Lithium extraction system by electrochemical de-intercalation method

文档序号：675418 发布日期：2021-04-30 浏览：27次中文

阅读说明：本技术 一种电化学脱嵌法提锂系统 (Lithium extraction system by electrochemical de-intercalation method ) 是由李传波闫东豪贾峰范庆顺张治奎于 2021-01-18 设计创作，主要内容包括：本发明提供了一种电化学脱嵌法提锂系统,涉及锂资源提取技术领域,以解决大规模工业生产的问题,优化实现电化学脱嵌法提锂工艺,更好地实现锂离子的富集分离,为后续工艺的进一步浓缩和净化打下良好的基础。该系统包括脱嵌槽、待提锂溶液容置部、富锂溶液容置部,待提锂溶液容置部与脱嵌槽之间设置第一循环系统,包括第一进液系统、第一出液系统和第一泄放系统；富锂溶液容置部与脱嵌槽之间设置第二循环系统,包括第二进液系统和第二出液系统和第二泄放系统；脱嵌槽上设置进液口和出液口,进液口连接进液管路,出液口连接出液管路。本发明用于通过设置合理的控制装置及管道布置实现富锂液和待提锂溶液在换向时交叉混合液量最少,实现高效生产。(The invention provides an electrochemical de-intercalation lithium extraction system, relates to the technical field of lithium resource extraction, aims to solve the problem of large-scale industrial production, optimizes and realizes an electrochemical de-intercalation lithium extraction process, better realizes enrichment and separation of lithium ions, and lays a good foundation for further concentration and purification of subsequent processes. The system comprises a desorption groove, a containing part of a solution to be extracted and a containing part of a lithium-rich solution, wherein a first circulating system is arranged between the containing part of the solution to be extracted and the desorption groove and comprises a first liquid inlet system, a first liquid outlet system and a first discharge system; a second circulating system is arranged between the lithium-rich solution containing part and the desorption groove and comprises a second liquid inlet system, a second liquid outlet system and a second discharge system; the de-embedding groove is provided with a liquid inlet and a liquid outlet, the liquid inlet is connected with a liquid inlet pipeline, and the liquid outlet is connected with a liquid outlet pipeline. The invention is used for realizing the minimum amount of cross mixed liquid of the lithium-rich liquid and the lithium solution to be extracted during reversing by arranging a reasonable control device and a pipeline, and realizing high-efficiency production.)

1. An electrochemical lithium extraction system by a desorption method is characterized by comprising a desorption tank, a lithium solution containing part to be extracted and a lithium-rich solution containing part, wherein:

a first circulating system is arranged between the accommodating part of the lithium solution to be extracted and the de-intercalation groove, and comprises a first liquid inlet system, a first liquid outlet system and a first discharge system;

a second circulating system is arranged between the lithium-rich solution accommodating part and the desorption groove, and comprises a second liquid inlet system, a second liquid outlet system and a second discharge system;

the de-embedding groove is provided with a liquid inlet and a liquid outlet, wherein the liquid inlet is connected with a liquid inlet pipeline, and the liquid outlet is connected with a liquid outlet pipeline.

2. The electrochemical lithium extraction system of claim 1, wherein:

the liquid inlet pipelines are at least two and are respectively a first liquid inlet pipeline and a second liquid inlet pipeline, and the liquid outlet pipelines are at least two and are respectively a first liquid outlet pipeline and a second liquid outlet pipeline;

the first liquid inlet system comprises the first liquid inlet pipeline, the first liquid outlet system comprises the first liquid outlet pipeline, the second liquid inlet system comprises the second liquid inlet pipeline, and the second liquid outlet system comprises the second liquid outlet pipeline.

3. The electrochemical lithium extraction system of claim 2, wherein: the first liquid inlet system at least comprises a first pipeline and a second pipeline, the first liquid outlet system at least comprises a fifth pipeline, and the first discharge system at least comprises a first discharge pipeline, wherein:

one end of the first pipeline is connected with the lithium solution containing part to be extracted, and the other end of the first pipeline is connected with the first liquid inlet pipeline;

one end of the second pipeline is connected to the first pipeline, and the other end of the second pipeline is connected with the second liquid inlet pipeline;

one end of the fifth pipeline is connected with the first liquid outlet pipeline, and the other end of the fifth pipeline is connected with the accommodating part for the lithium solution to be extracted through a first liquid return pipeline;

one end of the first discharge pipeline is connected with the first liquid inlet pipeline, and the other end of the first discharge pipeline is connected with the lithium solution containing part to be extracted through a fourth liquid return pipeline.

4. The electrochemical lithium extraction system of claim 3, wherein: first feed liquor system still includes first power device, first filter equipment, controlling means and first connecting device, wherein:

the first power device and the first filtering device are both arranged on the first pipeline;

the first connecting device comprises a plurality of connecting passages, and the first pipeline, the first liquid inlet pipeline and the first discharge pipeline are connected with the first connecting device;

the first pipeline, the second pipeline, the fifth pipeline, the first discharge pipeline, the first liquid return pipeline and the fourth liquid return pipeline are respectively provided with a first control device, a second control device, a fifth control device, a first discharge control device, a first liquid return control device and a fourth liquid return control device.

5. The electrochemical lithium extraction system of claim 4, wherein: the second liquid inlet system at least comprises a third pipeline and a fourth pipeline, the second liquid outlet system at least comprises a sixth pipeline, and the second discharge system at least comprises a second discharge pipeline, wherein:

one end of the third pipeline is connected with the lithium-rich solution containing part, and the other end of the third pipeline is connected with the first liquid inlet pipeline;

one end of the fourth pipeline is connected to the third pipeline, and the other end of the fourth pipeline is connected with the second liquid inlet pipeline;

one end of the sixth pipeline is connected with the second liquid outlet pipeline, and the other end of the sixth pipeline is connected with the lithium-rich solution containing part through a sixth liquid return pipeline;

one end of the second discharge pipeline is connected with the second liquid inlet pipeline, and the other end of the second discharge pipeline is connected with the lithium-rich solution containing part through a third liquid return pipeline.

6. The electrochemical lithium extraction system of claim 5, wherein: the second liquid inlet system further comprises a second power device, a second filtering device, a control device and a second connecting device, wherein:

the second power device and the second filtering device are both arranged on the third pipeline;

the second connecting device comprises a plurality of connecting passages, and the fourth pipeline, the second liquid inlet pipeline, the second discharge pipeline and the second pipeline are all connected with the second connecting device;

the third pipeline is connected with the first connecting device;

and a third control device, a fourth control device, a sixth control device, a second discharge control device, a third liquid return control device and a sixth liquid return control device are respectively arranged on the third pipeline, the fourth pipeline, the sixth pipeline, the second discharge pipeline, the third liquid return pipeline and the sixth liquid return pipeline.

7. The electrochemical lithium extraction system of any one of claims 1-6, wherein: still include the water washing portion, the water washing portion with take off and set up the third circulation system between the caulking groove, the third circulation system includes that the third advances the liquid system, the third goes out the liquid system and the third system of releasing.

8. The electrochemical lithium extraction system of claim 7, wherein: the third liquid inlet system is arranged as an upper washing water system, the third liquid inlet system at least comprises a seventh pipeline and an eighth pipeline, the third liquid outlet system at least comprises a first discharge pipeline and a second discharge pipeline, the third discharge system at least comprises a fifth pipeline and a sixth pipeline, and the third discharge system comprises:

one end of the seventh pipeline is connected with the washing part, and the other end of the seventh pipeline is connected with the first liquid outlet pipeline;

one end of the eighth pipeline is connected to the seventh pipeline, and the other end of the eighth pipeline is connected with the second liquid outlet pipeline;

one end of the first discharge pipeline is connected with the first liquid inlet pipeline, and the other end of the first discharge pipeline is connected with the water washing part through a fifth liquid return pipeline;

one end of the second discharge pipeline is connected with the second liquid inlet pipeline, and the other end of the second discharge pipeline is connected with the water washing part through a second liquid return pipeline;

one end of the fifth pipeline is connected with the first liquid outlet pipeline, and the other end of the fifth pipeline is connected with the water washing part through the second liquid return pipeline;

one end of the sixth pipeline is connected with the second liquid outlet pipeline, and the other end of the sixth pipeline is connected with the water washing part through the fifth liquid return pipeline.

9. The electrochemical lithium extraction system of claim 8, wherein: the third liquid inlet system further comprises a third power device, a third filtering device, a control device, a third connecting device and a fourth connecting device, wherein:

the third power device and the third filtering device are both arranged on the seventh pipeline;

the third connecting device comprises a plurality of connecting passages, and the seventh pipeline, the first liquid outlet pipeline and the fifth pipeline are all connected with the third connecting device;

the fourth connecting device comprises a plurality of connecting passages, and the eighth pipeline, the second liquid outlet pipeline and the sixth pipeline are all connected with the fourth connecting device;

and a seventh control device, an eighth control device, a second liquid return control device and a fifth liquid return control device are respectively arranged on the seventh pipeline, the eighth pipeline, the second liquid return pipeline and the fifth liquid return pipeline.

10. The electrochemical lithium extraction system of claim 7, wherein: the third system of intaking sets up to wash water system down, the third system of intaking includes seventh pipeline and eighth pipeline at least, the third play liquid system includes fifth pipeline and sixth pipeline at least, the third system of bleeding includes first pipeline and second pipeline of bleeding at least, wherein:

one end of the seventh pipeline is connected with the washing water part, and the other end of the seventh pipeline is connected with the first liquid inlet pipeline;

one end of the eighth pipeline is connected to the seventh pipeline, and the other end of the eighth pipeline is connected with the second liquid inlet pipeline;

one end of the fifth pipeline is connected with the first liquid outlet pipeline, and the other end of the fifth pipeline is connected with the water washing part through a second liquid return pipeline;

one end of the sixth pipeline is connected with the second liquid outlet pipeline, and the other end of the sixth pipeline is connected with the water washing part through a fifth liquid return pipeline;

11. The electrochemical lithium extraction system of claim 10, wherein: the third liquid inlet system further comprises a third power device, a third filtering device, a control device, a third connecting device and a fourth connecting device, wherein:

the third power device and the third filtering device are both arranged on the seventh pipeline;

the third connecting device comprises a plurality of connecting passages, and the seventh pipeline, the first liquid inlet pipeline and the first discharge pipeline are all connected with the third connecting device;

the fourth connecting device comprises a plurality of connecting passages, and the eighth pipeline, the second liquid inlet pipeline and the second discharge pipeline are all connected with the fourth connecting device;

the seventh pipeline, the eighth pipeline, the second liquid return pipeline and the fifth liquid return pipeline are respectively provided with a seventh control device, an eighth control device, a second liquid return control device and a fifth liquid return control device.

12. The system for extracting lithium by electrochemical deintercalation according to any of claims 8 to 11, wherein: the disengagement groove comprises at least one disengagement groove unit, and the two sides of the disengagement groove unit are respectively provided with a front end plate and a rear end plate, wherein:

each de-embedding groove unit comprises a cathode chamber frame body, an anode chamber frame body and an ionic membrane arranged between the cathode chamber frame body and the anode chamber frame body;

the cathode chamber frame body the anode chamber frame body the ionic membrane the front end plate and the rear end plate are all correspondingly provided with pipeline holes.

13. The electrochemical lithium extraction system of claim 12, wherein:

the first liquid inlet pipeline comprises a first pipe structure, a second pipe structure, a first connecting pipe structure and a first communicating pipeline, wherein the first pipe structure and the second pipe structure are arranged on the same horizontal plane;

the second liquid inlet pipeline comprises a third pipe structure, a fourth pipe structure, a fifth pipe structure, a second connecting pipe structure, a sixth pipe structure, a seventh pipe structure, an eighth pipe structure and a second communicating pipeline connected to the second connecting pipe structure, wherein the third pipe structure, the fourth pipe structure, the sixth pipe structure, the seventh pipe structure and the eighth pipe structure are sequentially arranged, and the inlet and the outlet of the fourth pipe structure and the inlet and the outlet of the seventh pipe structure are positioned on different horizontal planes; the third tube structure and the eighth tube structure are arranged in parallel, and the sixth tube structure and the fifth tube structure are arranged in parallel; the sixth pipe structure, the fifth pipe structure, the second connecting pipe structure and the second communicating pipeline are all located on the same horizontal plane;

the first liquid outlet pipeline comprises a third liquid outlet pipe structure, a fourth liquid outlet pipe structure, a fifth liquid outlet pipe structure, a first liquid outlet connecting pipe structure, a sixth liquid outlet pipe structure, a seventh liquid outlet pipe structure, an eighth liquid outlet pipe structure and a first liquid outlet communicating pipeline connected to the first liquid outlet connecting pipe structure, wherein the third liquid outlet pipe structure, the fourth liquid outlet pipe structure, the fifth liquid outlet pipe structure, the first liquid outlet connecting pipe structure, the sixth liquid outlet pipe structure, the;

the second liquid outlet pipeline comprises a first liquid outlet pipe structure, a second liquid outlet connecting pipe structure and a second liquid outlet communicating pipeline, wherein the first liquid outlet pipe structure and the second liquid outlet pipe structure are arranged on the same horizontal plane; the third liquid outlet pipe structure and the eighth liquid outlet pipe structure are arranged in parallel, and the sixth liquid outlet pipe structure and the fifth liquid outlet pipe structure are arranged in parallel; the sixth liquid outlet pipe structure, the fifth liquid outlet pipe structure, the first liquid outlet connecting pipe structure and the first liquid outlet communicating pipeline are positioned on the same horizontal plane.

14. The electrochemical lithium extraction system of claim 13, wherein: the disengagement groove is provided as at least two disengagement grooves connected in series, wherein:

the third circulating system also comprises a serial pipeline, the liquid outlet of the previous de-embedding groove is connected with the liquid inlet of the next adjacent de-embedding groove through the serial pipeline, and a control device is arranged on the serial pipeline;

and the liquid inlet of each de-embedding groove is respectively connected with a discharge pipeline, and a control device is arranged on the discharge pipeline.

15. The electrochemical lithium extraction system of claim 14, wherein: the disengagement groove is provided with two disengagement grooves, including a first disengagement groove and a second disengagement groove, wherein:

the series pipeline is arranged to comprise a first series pipeline and a second series pipeline, and a first liquid outlet of the first de-embedding groove is connected with a second liquid inlet of the second de-embedding groove through the second series pipeline;

the second liquid outlet of the first de-embedding groove is connected with the first liquid inlet of the second de-embedding groove through the first serial pipeline, the first serial pipeline is provided with an eleventh control device, and the second serial pipeline is provided with a twelfth control device.

16. The electrochemical lithium extraction system of claim 15, wherein: the third liquid inlet system is arranged as a wash-up water system, the third liquid inlet system comprises a seventh pipeline and an eighth pipeline, the third liquid outlet system comprises a fifth pipeline and a sixth pipeline, the third discharge system comprises a first discharge pipeline, a second discharge pipeline, a third discharge pipeline and a fourth discharge pipeline, and the third discharge pipeline, the wash-up water system, the third discharge pipeline and the fourth discharge pipeline are arranged in parallel, wherein:

the second liquid outlet of the first de-embedding groove is connected with a seventh pipeline through a second washing water inlet pipeline, and the first liquid outlet of the first de-embedding groove is connected with an eighth pipeline through a first washing water inlet pipeline;

the first liquid outlet of the second disengaging and embedding groove is connected with the eighth pipeline through a third washing water inlet pipeline, and the second liquid outlet of the second disengaging and embedding groove is connected with the seventh pipeline through a fourth washing water inlet pipeline;

a first liquid outlet of the second de-embedding groove is connected with the sixth pipeline, and a second liquid outlet of the second de-embedding groove is connected with the fifth pipeline;

the first liquid inlet of the first de-embedding groove and the second liquid inlet of the first de-embedding groove are respectively connected with a first discharge pipeline and a second discharge pipeline, the first discharge pipeline is connected with the water washing part through a fifth liquid return pipeline, and the second discharge pipeline is connected with the water washing part through a second liquid return pipeline;

the first liquid inlet of the second de-embedding groove and the second liquid inlet of the second de-embedding groove are respectively connected with a third discharge pipeline and a fourth discharge pipeline, the third discharge pipeline is connected with the water washing part through the second liquid return pipeline, and the fourth discharge pipeline is connected with the water washing part through the fifth liquid return pipeline;

and a third discharge control device is arranged on the third discharge pipeline, and a fourth discharge control device is arranged on the fourth discharge pipeline.

17. The electrochemical lithium extraction system of claim 15, wherein: the third system of intaking sets up to wash down the water system, the third system of intaking includes seventh pipeline and eighth pipeline, the third system of going out the liquid includes fifth pipeline and sixth pipeline, the third system of bleeding includes first pipeline, second pipeline, third pipeline and the fourth pipeline of bleeding, wherein:

the first liquid inlet of the first de-embedding groove is connected with the seventh pipeline through a first liquid inlet pipeline, and the second liquid inlet of the first de-embedding groove is connected with the eighth pipeline through a second liquid inlet pipeline;

a first liquid outlet of the second de-embedding groove is connected with the sixth pipeline, and a second liquid outlet of the second de-embedding groove is connected with the fifth pipeline;

and a third discharge control device is arranged on the third discharge pipeline, and a fourth discharge control device is arranged on the fourth discharge pipeline.

Technical Field

The invention relates to the technical field of lithium resource extraction, in particular to a lithium extraction system by an electrochemical de-intercalation method.

Background

With the consumption of non-renewable energy, the development and utilization of new energy is a necessary trend. The new energy automobile, as a typical representative of the development and utilization of new energy, has been rapidly developed in recent years, and will eventually surpass the market share of the conventional fuel automobile, and gradually complete the replacement of the fuel automobile. The market demand of lithium as an essential energy metal for a new energy automobile power system will also increase rapidly, and the efficient, clean and low-cost exploitation of lithium resources is crucial to the sustainable development of the new energy automobile industry.

The lithium resource exists in nature mainly in the form of ore and brine, wherein most of the lithium resource exists in the brine, particularly salt lake brine, and the reserve accounts for more than 80% of the total reserve of the lithium resource. Along with the exploitation of high-quality lithium ore resources, the requirements of the current process that the high-grade ores are less and the cost for extracting lithium from the ores is higher are met. Compared with the extraction of lithium from ore, the lithium in brine has rich lithium resource reserves, and lithium exists in an ion form, so that the lithium extraction cost has natural advantages.

Besides lithium, brine usually contains symbiotic cations such as sodium, potassium, magnesium, calcium and the like, Mg2+ and Li + are positioned at diagonal positions of a periodic table of elements, and the chemical properties are very similar according to the diagonal rule, so that efficient separation is difficult to carry out, the development and utilization of lithium resources in brine are severely restricted, and the extraction of lithium from brine with high magnesium-lithium ratio is a worldwide problem.

At present, the lithium resource in brine is extracted by adopting the technologies of a precipitation method, a carbonization method, a calcination method, a solvent extraction method, an adsorption method and the like, but most of the methods have complex processes, or have pollution problems, or have high production cost or have requirements on the properties of the brine.

In order to solve the problem that salt lake brine with high magnesium-lithium ratio is difficult to economically, efficiently and cleanly extract, CN 102382984A provides a new technology of extracting lithium by an electrochemical de-intercalation method, namely, the working principle of an aqueous lithium battery is utilized, a battery anode material which has 'memory effect' on lithium ions is taken as an electrode material, salt lake brine is taken as a cathode electrolyte, a supporting electrolyte without magnesium is taken as an anode electrolyte, so that an electrochemical de-intercalation system is formed, and the lithium extraction is realized. In order to solve the problem of industrial production, a valve and a loop pipeline arrangement method matched with a cell body are required to be provided, the lithium extraction process by an electrochemical desorption method is optimized, the enrichment and separation of lithium ions are realized, and a good foundation is laid for further concentration and purification of the subsequent process.

The present invention has been made in view of the above circumstances.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a valve and a pipeline arrangement method matched with a de-intercalation tank body for extracting lithium from a salt lake by an electrochemical de-intercalation method.

The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.

In order to achieve the purpose, the invention provides the following technical scheme: an electrochemical lithium extraction system by a deintercalation method comprises a deintercalation groove, a lithium solution containing part to be extracted and a lithium-rich solution containing part, wherein:

Furthermore, the number of the liquid inlet pipelines is at least two, namely a first liquid inlet pipeline and a second liquid inlet pipeline, and the number of the liquid outlet pipelines is at least two, namely a first liquid outlet pipeline and a second liquid outlet pipeline;

Further, the first liquid inlet system at least comprises a first pipeline and a second pipeline, the first liquid outlet system at least comprises a fifth pipeline, the first drainage system at least comprises a first drainage pipeline, wherein:

one end of the first pipeline is connected with the lithium solution containing part to be extracted, and the other end of the first pipeline is connected with the first liquid inlet pipeline;

one end of the second pipeline is connected to the first pipeline, and the other end of the second pipeline is connected with the second liquid inlet pipeline;

Further, the first liquid inlet system further comprises a first power device, a first filtering device, a control device and a first connecting device, wherein:

the first power device and the first filtering device are both arranged on the first pipeline;

Further, the second liquid inlet system at least comprises a third pipeline and a fourth pipeline, the second liquid outlet system at least comprises a sixth pipeline, and the second drainage system at least comprises a second drainage pipeline, wherein:

one end of the third pipeline is connected with the lithium-rich solution containing part, and the other end of the third pipeline is connected with the first liquid inlet pipeline;

one end of the fourth pipeline is connected to the third pipeline, and the other end of the fourth pipeline is connected with the second liquid inlet pipeline;

Further, the second liquid inlet system further comprises a second power device, a second filtering device, a control device and a second connecting device, wherein:

the second power device and the second filtering device are both arranged on the third pipeline;

the third pipeline is connected with the first connecting device;

Further, still include the washing water portion, the washing water portion with set up the third circulation system between the disengagement and embedding groove, the third circulation system includes that the third advances the liquid system, the third goes out the liquid system and the third system of releasing.

Further, the third liquid inlet system is set as an upper washing water system, the third liquid inlet system at least comprises a seventh pipeline and an eighth pipeline, the third liquid outlet system at least comprises a first discharge pipeline and a second discharge pipeline, the third discharge system at least comprises a fifth pipeline and a sixth pipeline, wherein:

one end of the seventh pipeline is connected with the washing part, and the other end of the seventh pipeline is connected with the first liquid outlet pipeline;

one end of the eighth pipeline is connected to the seventh pipeline, and the other end of the eighth pipeline is connected with the second liquid outlet pipeline;

Further, the third liquid inlet system further comprises a third power device, a third filtering device, a control device, a third connecting device and a fourth connecting device, wherein:

the third power device and the third filtering device are both arranged on the seventh pipeline;

Further, the third liquid inlet system is set as a lower water washing system, the third liquid inlet system at least comprises a seventh pipeline and an eighth pipeline, the third liquid outlet system at least comprises a fifth pipeline and a sixth pipeline, the third discharge system at least comprises a first discharge pipeline and a second discharge pipeline, wherein:

one end of the seventh pipeline is connected with the washing water part, and the other end of the seventh pipeline is connected with the first liquid inlet pipeline;

one end of the eighth pipeline is connected to the seventh pipeline, and the other end of the eighth pipeline is connected with the second liquid inlet pipeline;

Further, the third liquid inlet system further comprises a third power device, a third filtering device, a control device, a third connecting device and a fourth connecting device, wherein:

the third power device and the third filtering device are both arranged on the seventh pipeline;

Further, the disengagement groove comprises at least one disengagement groove unit, and the two sides of the disengagement groove unit are respectively provided with a front end plate and a rear end plate, wherein:

the cathode chamber frame body the anode chamber frame body the ionic membrane the front end plate and the rear end plate are all correspondingly provided with pipeline holes.

Further, the first liquid inlet pipeline comprises a first pipe structure, a second pipe structure, a first connecting pipe structure and a first communicating pipeline, wherein the first pipe structure and the second pipe structure are arranged on the same horizontal plane;

the second liquid inlet pipeline comprises a third pipe structure, a fourth pipe structure, a fifth pipe structure, a second connecting pipe structure, a sixth pipe structure, a seventh pipe structure, an eighth pipe structure and a second communicating pipeline connected to the second connecting pipe structure, wherein the third pipe structure, the fourth pipe structure, the sixth pipe structure, the seventh pipe structure and the eighth pipe structure are sequentially arranged, the fourth pipe structure and the seventh pipe structure are arranged in parallel, and inlets and outlets of the fourth pipe structure and the seventh pipe structure are positioned on different horizontal planes; the third tube structure and the eighth tube structure are arranged in parallel, and the sixth tube structure and the fifth tube structure are arranged in parallel; the sixth pipe structure, the fifth pipe structure, the second connecting pipe structure and the second communicating pipeline are all located on the same horizontal plane;

Further, the disengagement groove is arranged to comprise at least two disengagement grooves connected in series, wherein:

and the liquid inlet of each de-embedding groove is respectively connected with a discharge pipeline, and a control device is arranged on the discharge pipeline.

Further, the disengagement groove is provided in two, including a first disengagement groove and a second disengagement groove, wherein:

Further, the third liquid inlet system is set as a wash-up water system, the third liquid inlet system comprises a seventh pipeline and an eighth pipeline, the third liquid outlet system comprises a fifth pipeline and a sixth pipeline, the third discharge system comprises a first discharge pipeline, a second discharge pipeline, a third discharge pipeline and a fourth discharge pipeline, wherein:

a first liquid outlet of the second de-embedding groove is connected with the sixth pipeline, and a second liquid outlet of the second de-embedding groove is connected with the fifth pipeline;

and a third discharge control device is arranged on the third discharge pipeline, and a fourth discharge control device is arranged on the fourth discharge pipeline.

Further, the third liquid inlet system is set as a lower water washing system, the third liquid inlet system comprises a seventh pipeline and an eighth pipeline, the third liquid outlet system comprises a fifth pipeline and a sixth pipeline, the third discharge system comprises a first discharge pipeline, a second discharge pipeline, a third discharge pipeline and a fourth discharge pipeline, wherein:

a first liquid outlet of the second de-embedding groove is connected with the sixth pipeline, and a second liquid outlet of the second de-embedding groove is connected with the fifth pipeline;

and a third discharge control device is arranged on the third discharge pipeline, and a fourth discharge control device is arranged on the fourth discharge pipeline.

The invention provides a lithium extraction system by an electrochemical de-intercalation method, which comprises the following steps:

1. the valve number used in the whole procedure of the whole electrochemical desorption lithium extraction separation enrichment reaction is small. The independent washing water loop and the pipeline are arranged horizontally and symmetrically, and matched with valve type selection, residual solution in the pipeline after each reaction process is further reduced, so that the mixing amount of the residual lithium solution to be extracted and the target lithium-rich solution in the pipeline of the next reaction is reduced, the impurity content in the target lithium-rich solution is reduced accordingly, and the burden of the subsequent process is reduced.

2. The mode of independent upper washing is further set, so that the total consumption of washing water in system operation is reduced although not too much one-time fixed investment is increased, and meanwhile, the washing process is short in time and better in effect; the resistance of the pipeline is reduced, the water inlet flow and the pressure are uniform, and preliminary preparation is provided for the uniformity of a flow field in the cavity of the de-embedding groove.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a first embodiment of a lithium extraction system according to the present invention;

FIG. 2 is a schematic structural diagram of a deintercalation slot unit in a lithium extraction system by an electrochemical deintercalation method according to the invention;

FIG. 3 is a schematic structural diagram of a liquid inlet pipeline arrangement of a lithium extraction system by an electrochemical desorption method according to the present invention;

FIG. 4 is a schematic structural diagram of a liquid outlet pipe arrangement of a lithium extraction system by an electrochemical desorption method according to the present invention;

FIG. 5 is a schematic structural diagram of a second embodiment of a lithium extraction system according to the present invention;

FIG. 6 is a schematic structural diagram of a third embodiment of a lithium extraction system according to the electrochemical deintercalation method of the invention;

FIG. 7 is a schematic structural diagram of a fourth embodiment of the lithium extraction system by an electrochemical desorption method according to the present invention.

In the figure:

1. removing the embedding groove; 2. a receiving part of the lithium solution to be extracted; 3. a lithium-rich solution receiving part; 4. a water washing part; 11. a first liquid inlet; 12. a second liquid inlet; 13. a third liquid inlet; 14. a fourth liquid inlet; 110. a first liquid outlet; 120. a second liquid outlet; 130. a third liquid outlet; 140. a fourth liquid outlet; 15. a first liquid inlet pipeline; 16. a second liquid inlet pipeline; 150. a first liquid outlet pipeline; 160. a second liquid outlet pipeline; 10. a first pipeline; 101. a first power unit; 102. a first filtering device; 103. a first control device; 104. a first four-way pipe; 105. a first pressure gauge; 20. a second pipeline; 203. a second control device; 204. a second four-way pipe; 30. a third pipeline; 301. a second power unit; 302. a second filtering device; 303. a third control device; 305. a second pressure gauge; 40. a fourth pipeline; 403. a fourth control device; 50. a fifth pipeline; 503. a fifth control device; 510. a third pressure gauge; 60. a sixth pipeline; 603. a sixth control device; 605. a fourth pressure gauge; 70. a seventh pipeline; 701. a third power unit; 702. a third filtering device; 703. a seventh control device; 704. a first three-way pipe; 705. a fifth pressure gauge; 80. an eighth pipeline; 803. an eighth control device; 804. a second three-way pipe; 90. a first bleed line; 903. a first bleed control device; 100. a second bleed line; 1003. a second bleed control device; 61. a first liquid return control device; 62. a second liquid return control device; 63. a third liquid return control device; 64. a fourth liquid return control device; 65. a fifth liquid return control device; 66. a sixth liquid return control device; 171. a front end plate; 172. a rear end plate; 173. a cathode chamber frame; 174. an anode chamber frame; 175. an ionic membrane; 151. a first tube structure; 152. a second tube structure; 153. a first connecting tube structure; 154. a first communicating pipe; 1501. a first liquid outlet connecting pipe structure; 1502. a first liquid outlet communication pipeline; 1503. a third liquid outlet pipe structure; 1504. a fourth liquid outlet pipe structure; 1505. a fifth liquid outlet pipe structure; 1506. a sixth liquid outlet pipe structure; 1507. a seventh liquid outlet pipe structure; 1508. an eighth liquid outlet pipe structure; 161. a second connecting tube structure; 162. a second communication line; 163. a third tube structure; 164. a fourth tube structure; 165. a fifth tube structure; 166. a sixth tube structure; 167. a seventh tube structure; 168. an eighth tube structure; 1601. a first liquid outlet pipe structure; 1602. a second liquid outlet pipe structure; 1603. a second liquid outlet connecting pipe structure; 1604. a second liquid outlet communication pipeline; 36. a first anode chamber; 32. a second anode chamber; 31. a first cathode chamber; 33. a second cathode chamber; 34. a front end plate of the releasing and embedding groove; 35. a rear end plate of the releasing groove; 1a, a first release and embedding groove; 1b, a second disengaging and inserting groove; 5. a first series line; 6. a second series line; 7. a third bleed line; 8. a fourth bleed line; 111. a first liquid inlet of the first de-embedding groove; 112. a second liquid inlet of the first de-embedding groove; 113. a first liquid outlet of the first de-embedding groove; 114. a second liquid outlet of the first de-embedding groove; 121. a first liquid inlet of the second de-embedding groove; 122. a second liquid inlet of the second de-embedding groove; 123. a first liquid outlet of the second de-embedding groove; 124. a second liquid outlet of the second de-embedding groove; 80a, a first washing water inlet pipeline; 70a, a second washing water inlet pipeline; 80b, a third washing water inlet pipeline; 70b, a fourth washing water inlet pipeline; 1103. an eleventh control device; 1203. a twelfth control device; 1303. a third bleed control device; 1403. a fourth bleed control means.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

The first embodiment is as follows:

the invention provides a lithium extraction system by an electrochemical desorption method, fig. 1 is a schematic structural diagram of the embodiment, as shown in fig. 1, including: a desorption tank 1, a lithium solution containing part 2 and a lithium-rich solution containing part 3. During normal work, brine or other solution which contains lithium and needs to extract lithium from the brine and is contained in the cathode side unit cell body is called lithium solution to be extracted, and target lithium-enriched solution contained in the anode side unit cell body is called lithium-enriched solution; in the reaction process, the solution on the target solution side, whether the solution contains no lithium in the supporting electrolyte for the first time or the solution with gradually increasing concentration, is called "lithium-rich solution", and in this embodiment, the lithium-to-be-extracted solution containing part 2 and the lithium-rich solution containing part 3 are both tank bodies.

A first circulating system is arranged between the accommodating part 2 for lithium solution to be extracted and the de-intercalation tank 1, and comprises a first liquid inlet system, a first liquid outlet system and a first discharge system; a second circulating system is arranged between the lithium-rich solution accommodating part 3 and the desorption groove 1, and comprises a second liquid inlet system, a second liquid outlet system and a second discharge system;

set up inlet and liquid outlet on the disengaging groove 1, the inlet is connected into the liquid pipeline, and the liquid outlet is connected out the liquid pipeline, and when the in-service use, the number of inlet, feed liquor pipeline sets up according to actual use needs, also can set up inlet and liquid outlet as required, the number of liquid pipeline and play liquid pipeline is different, satisfy the use needs can.

As an alternative embodiment, at least two liquid inlet pipelines are provided, namely a first liquid inlet pipeline 15 and a second liquid inlet pipeline 16. The number of the liquid outlet pipes is at least two, namely a first liquid outlet pipe 150 and a second liquid outlet pipe 160. In this embodiment, two sets of liquid inlets are provided, each set includes a first liquid inlet 11, a second liquid inlet 12, a third liquid inlet 13, and a fourth liquid inlet 14, and the liquid outlets and the liquid inlets are in one-to-one correspondence, and are provided as a first liquid outlet 110, a second liquid outlet 120, a third liquid outlet 130, and a fourth liquid outlet 140.

The first liquid inlet system comprises a first liquid inlet pipeline 15, and the first liquid outlet system comprises a first liquid outlet pipeline 150; the second liquid inlet system comprises a second liquid inlet pipeline 16, and the second liquid outlet system comprises a second liquid outlet pipeline 160.

Wherein, the liquid inlet is connected with the first liquid inlet pipeline 15, the second liquid inlet pipeline 16, and the liquid outlet is connected with the first liquid outlet pipeline 150 and the second liquid outlet pipeline 160, and the liquid flowing in through the first liquid inlet 11 and the third liquid inlet 13 flows out from the liquid outlets of the first liquid outlet 110 and the third liquid outlet 130; the liquid flowing in through the second inlet port 12 and the fourth inlet port 14 flows out through the second outlet port 120 and the fourth outlet port 140.

In an alternative embodiment, the first intake system includes at least a first pipeline 10 and a second pipeline 20, the first tapping system includes at least a fifth pipeline 50, and the first tapping system includes at least a first tapping pipeline 90.

Wherein, one end of the first pipeline 10 is connected with the liquid outlet of the lithium solution containing part 2 to be extracted, and the other end of the first pipeline is connected with the first liquid inlet pipeline 15; one end of the second pipeline 20 is connected to the first pipeline 10, and the other end of the second pipeline 20 is connected to the second liquid inlet pipeline 16;

one end of the fifth pipeline 50 is connected to the first liquid outlet pipeline 150, and the other end of the fifth pipeline 50 is connected to the accommodating part 2 for lithium solution to be extracted through the first liquid return pipeline;

one end of the first discharge pipeline 90 is connected to the first liquid inlet pipeline 15, and the other end of the first discharge pipeline 90 is connected to the accommodating portion 2 for lithium solution to be extracted through the fourth liquid return pipeline.

Specifically, the first liquid inlet system further includes a first power device 101, a first filtering device 102, a control device, and a first connecting device, the first connecting device includes a plurality of connecting passages, in this embodiment, the first connecting device is a first four-way pipeline 104, and the first pipeline 10, the first liquid inlet pipeline 15, and the first discharge pipeline 90 are all connected to the first four-way pipeline 104.

Wherein: the first pipeline 10 is sequentially provided with a first power device 101, a first filtering device 102 and a first control device 103; in this embodiment, the first power unit 101 employs a pump; the first, second, fifth, first bleed off, first return line 10, second line 20, fifth line 50, first bleed off line 90, first return line and fourth return line are respectively provided with a first control device 103, a second control device 203, a fifth control device 503, a first bleed off control device 903, a first return control device 61 and a fourth return control device 64.

In an alternative embodiment, the second inlet system includes at least a third pipeline 30 and a fourth pipeline 40, the second outlet system includes at least a sixth pipeline 60, and the second drain system includes at least a second drain pipeline 100.

One end of the third pipeline 30 is connected to the liquid outlet of the lithium-rich solution containing part 3, the other end of the third pipeline 30 is connected to the first liquid inlet pipeline 15, one end of the fourth pipeline 40 is connected to the third pipeline 30, and the other end of the fourth pipeline 40 is connected to the second liquid inlet pipeline 16;

one end of the sixth pipeline 60 is connected to the second liquid outlet pipeline 160, and the other end of the sixth pipeline 60 is connected to the lithium-rich solution accommodating part 3 through a sixth liquid return pipeline;

one end of the second discharge line 100 is connected to the second liquid inlet line 16, and the other end of the second discharge line 100 is connected to the lithium-rich solution accommodating portion 3 through a third liquid return line.

Specifically, the second liquid inlet system further includes a second power device 301, a second filtering device 302, a control device, and a second connecting device, where the second connecting device includes a plurality of connecting passages, in this embodiment, the second connecting device is configured as a second four-way pipe 204, and the fourth pipe 40, the second liquid inlet pipe 16, the second drain pipe 100, and the second pipe 20 are all connected to the second four-way pipe 204.

Wherein, the third pipeline 30 is sequentially provided with a second power device 301, a second filtering device 302 and a third control device 303; in this embodiment, the second power unit 301 employs a pump; the third pipeline 30, the fourth pipeline 40, the sixth pipeline 60, the second drain pipeline 100, the third return pipeline and the sixth return pipeline are respectively provided with a third control device 303, a fourth control device 403, a sixth control device 603, a second drain control device 1003, a third return control device 63 and a sixth return control device 66.

In an optional embodiment, the lithium extraction system by the electrochemical desorption method further includes a water washing unit 4, in this embodiment, the water washing unit adopts a tank, and a third circulation system is disposed between the water washing unit 4 and the desorption tank 1, and the third circulation system includes a third liquid inlet system, a third liquid outlet system, and a third discharge system.

As an alternative embodiment, the third liquid inlet system is configured as an upper washing water system, the third liquid inlet system at least includes a seventh pipeline 70 and an eighth pipeline 80, the third liquid outlet system at least includes a first drain pipeline 90 and a second drain pipeline 100, and the third drain system at least includes a fifth pipeline 50 and a sixth pipeline 60.

Wherein, one end of the seventh pipeline 70 is connected with the liquid outlet of the washing water part 4, and the other end of the seventh pipeline 70 is connected with the first liquid outlet pipeline 150; one end of the eighth pipeline 80 is connected to the seventh pipeline 70, and the other end of the eighth pipeline 80 is connected to the second liquid outlet pipeline 160.

One end of the first discharge pipeline 90 is connected with the first liquid inlet pipeline 15, and the other end of the first discharge pipeline 90 is connected with the water washing part 4 through a fifth liquid return pipeline; one end of the second discharge pipeline 100 is connected to the second liquid inlet pipeline 16, and the other end of the second discharge pipeline 100 is connected to the water washing unit 4 through the second liquid return pipeline.

One end of the fifth pipeline 50 is connected with the first liquid outlet pipeline 150, and the other end of the fifth pipeline 50 is connected with the water washing part 4 through the second liquid return pipeline; one end of the sixth pipeline 60 is connected to the second liquid outlet pipeline 160, and the other end of the sixth pipeline is connected to the water washing unit 4 through the fifth liquid return pipeline.

Specifically, the third liquid inlet system further includes a third power device 701, a third filtering device 702, a control device, a third connecting device, and a fourth connecting device, wherein: the third connecting means and the fourth connecting means each comprise a plurality of connecting passages.

In this embodiment, the third connecting device is a first three-way pipeline 704, and the seventh pipeline 70, the first liquid outlet pipeline 150, and the fifth pipeline 50 are all connected to the first three-way pipeline 704; the fourth connecting device is a second three-way pipeline 804, and the eighth pipeline 80, the second liquid outlet pipeline 160 and the sixth pipeline 60 are all connected with the second three-way pipeline 804.

Wherein: a third power device 701, a third filtering device 702 and a seventh control device 703 are sequentially arranged on the seventh pipeline 70, in this embodiment, the third power device 701 adopts a pump; the seventh pipeline 70, the eighth pipeline 80, the second liquid return pipeline, and the fifth liquid return pipeline are respectively provided with a seventh control device 703, an eighth control device 803, a second liquid return control device 62, and a fifth liquid return control device 65.

When installed, the lowest position of the first and second drain lines 90 and 100 is ensured to be higher than the first, second, third, fourth, fifth and sixth liquid return control devices 61, 62, 63, 64, 65 and 66.

As an alternative embodiment, the release groove 1 includes at least one release groove unit, fig. 2 is a schematic structural diagram of the release groove unit of the present embodiment, and as shown in fig. 2, a front end plate 171 and a rear end plate 172 are respectively disposed at two sides of the release groove unit, wherein: each of the trap units includes a cathode chamber frame 173, an anode chamber frame 174, and an ionic membrane 175 disposed between the cathode chamber frame 173 and the anode chamber frame 174; the cathode chamber frame 173, the anode chamber frame 174, the ion membrane 175, the front end plate 171, and the rear end plate 172 are provided with pipe holes.

In this embodiment, four lower liquid inlet holes are formed below the front end plate 171, the ionic membrane 175, the cathode chamber frame 173 and the anode chamber frame 174, four upper liquid outlet holes are formed at the top of the front end plate, a lower liquid inlet water distribution tank and an upper liquid outlet water distribution tank are included in the cathode chamber frame 173 and the anode chamber frame 174, a second hole 1732 and a fourth hole 1734 below the cathode chamber frame 173 are cathode tank unit water inlet channels, and a first hole 1735 and a third hole 1737 above the cathode chamber frame 173 are cathode tank unit water outlet channels; the first hole 1745 and the third hole 1747 above the anode chamber frame 174 are cathode cell unit water inlet channels, and the second hole 1742 and the fourth hole 1744 below the anode chamber frame 174 are cathode cell unit water inlet channels; the first hole 1731 and the third hole 1733 below the cathode chamber frame 173 are plate frame via holes for forming an anode tank liquid inlet pipeline, the second hole 1736 and the fourth hole 1738 above the cathode chamber frame 173 form plate frame via holes for forming an anode tank liquid outlet pipeline, the first hole 1741 and the third hole 1743 below the anode chamber frame 174 are plate frame via holes for forming an anode tank liquid inlet pipeline, and the second hole 1746 and the fourth hole 1748 above the anode chamber frame 174 form plate frame via holes for forming an anode tank liquid outlet pipeline; the first hole 1711 and the third hole 1713 below the front end plate 171, the second hole 1716 and the fourth hole 1718 above the front end plate are via holes for respectively forming an anode chamber inlet pipe and an anode chamber outlet pipe, the second hole 1712 and the fourth hole 1714 below the front end plate 171, and the first hole 1715 and the third hole 1717 above the front end plate are via holes for forming a cathode chamber inlet pipe and an anode chamber outlet pipe, or a hole for forming a liquid outlet pipe can be formed at the upper end of the rear end plate of the de-embedding groove, and the holes can be arranged according to actual use requirements.

As an alternative implementation manner, fig. 3 is a schematic structural diagram of a liquid inlet pipe arrangement in the present embodiment, and fig. 4 is a schematic structural diagram of a liquid outlet pipe arrangement in the present embodiment, as shown in fig. 3 and fig. 4, where the liquid outlet pipe arrangement manner is the same as the water inlet pipe arrangement manner.

Specifically, the first liquid inlet pipeline 15 is configured to include a first pipe structure 151, a second pipe structure 152, a first connection pipe structure 153 connecting the first pipe structure 151 and the second pipe structure 152, and a first connection pipeline 154 connected to the first connection pipe structure 153, which are disposed on the same horizontal plane. The second liquid inlet line 16 is provided to include a third tube structure 163, a fourth tube structure 164, a fifth tube structure 165, a second connecting tube structure 161, a sixth tube structure 166, a seventh tube structure 167, and an eighth tube structure 168, which are arranged in this order, and a second communication line 162 connected to the second connecting tube structure 161.

Wherein the fourth tube structure 164 and the seventh tube structure 167 are disposed in parallel, and the inlets and outlets of the fourth tube structure 164 and the seventh tube structure 167 are located on different horizontal planes; the third tube structure 163 is arranged in parallel with the eighth tube structure 168 and the sixth tube structure 166 is arranged in parallel with the fifth tube structure 165;

the sixth tube structure 166, the fifth tube structure 165, the second connecting tube structure 161, and the second communicating tube 162 are located on the same horizontal plane, and the fourth tube structure 164 and the seventh tube structure 167 are arranged in an inclined manner at a certain angle, in this embodiment, the fourth tube structure 164 and the seventh tube structure 167 are arranged to be inclined downward, so as to avoid interference caused by mutual contact between the first liquid inlet tube 15 and the second liquid inlet tube 16 during use. In the pipeline between each loop liquid inlet control device and the liquid inlet, in order to ensure that reaction liquid is discharged into respective buffer tanks after each process is finished, and the residual liquid in the pipeline is minimum, the diameters of each pipe fitting and the pipeline in each liquid inlet pipeline are required to be the same, the central lines are in the same level, the pipelines with the same functions are parallel, the connection modes are consistent, and the concave connection in a straight-through loop is avoided.

The first liquid outlet pipeline 150 includes a third liquid outlet pipe structure 1503, a fourth liquid outlet pipe structure 1504, a fifth liquid outlet pipe structure 1505, a first liquid outlet connecting pipe structure 1501, a sixth liquid outlet pipe structure 1506, a seventh liquid outlet pipe structure 1507, an eighth liquid outlet pipe structure 1508, and a first liquid outlet communicating pipeline 1502 connected to the first liquid outlet connecting pipe structure 1501.

The second liquid outlet pipe 160 includes a first liquid outlet pipe structure 1601, a second liquid outlet pipe structure 1602, a second liquid outlet connecting pipe structure 1603 connecting the first liquid outlet pipe structure 1601 and the second liquid outlet pipe structure 1602, and a second liquid outlet communicating pipe 1604 connected to the second liquid outlet connecting pipe structure 1603.

The fourth liquid outlet pipe structure 1504 and the seventh liquid outlet pipe structure 1507 are arranged in parallel, and inlets and outlets of the fourth liquid outlet pipe structure 1504 and the seventh liquid outlet pipe structure 1507 are positioned on different horizontal planes; the third liquid outlet pipe structure 1503 is parallel to the eighth liquid outlet pipe structure 1508, and the sixth liquid outlet pipe structure 1506 is parallel to the fifth liquid outlet pipe structure 1505;

the sixth liquid outlet pipe structure 1506, the fifth liquid outlet pipe structure 1505, the first liquid outlet connecting pipe structure 1501 and the first liquid outlet communicating pipe 1502 are located on the same horizontal plane, and the fourth liquid outlet pipe structure 1504 and the seventh liquid outlet pipe structure 1507 are arranged in an inclined manner at a certain angle, in this embodiment, the fourth liquid outlet pipe structure 1504 and the seventh liquid outlet pipe structure 1507 are arranged to be inclined downwards, so that the first liquid outlet pipe 150 and the second liquid outlet pipe 160 are prevented from being contacted with each other to generate interference when in use. In the pipeline between each loop liquid inlet control device and the liquid inlet, in order to ensure that reaction liquid is discharged into respective buffer tanks after each process is finished, and the residual liquid in the pipeline is minimum, the diameters of each pipe fitting and the pipeline in each liquid inlet pipeline are required to be the same, the central lines are in the same level, the pipelines with the same functions are parallel, the connection modes are consistent, and the concave connection in a straight-through loop is avoided.

In this embodiment, when the pipeline and the control device body are arranged, it is ensured that the position of the disengagement groove 1 in the system is at the highest, the pipeline installation positions behind the first bleed control device 903 and the second bleed control device 1003 for controlling the liquid bleed are lower than the first bleed control device 903 and the second bleed control device 1003, and higher than the first liquid return control device 61 to the sixth liquid return control device 66, and each tank body is at the lowest position, so that the liquid in the disengagement groove can easily flow back to the respective tank body by the self gravity.

The lithium extraction system by the electrochemical desorption method further comprises a first pressure gauge 105, a second pressure gauge 305, a third pressure gauge 510, a fourth pressure gauge 605 and a fifth pressure gauge 705, wherein the first pressure gauge 105, the second pressure gauge 305, the third pressure gauge 510, the fourth pressure gauge 605 and the fifth pressure gauge 705 are respectively arranged on the first pipeline 10, the third pipeline 30, the fifth pipeline 50, the sixth pipeline 60 and the seventh pipeline 70, and are used for monitoring the liquid pressure in the pipelines in real time.

The lithium extraction process by the electrochemical de-intercalation method comprises the following steps: the forward reaction, the reversing, the reverse reaction, the reversing and the forward reaction are carried out circularly.

The working principle of the embodiment is as follows:

the positive reaction process of extracting lithium by an electrochemical de-intercalation method comprises the following steps: adding a positive plate on the side of the lithium-rich solution (lithium extraction side) to connect with the positive electrode; the negative plate is arranged on the side of the solution to be extracted (the side where lithium ions are inserted) and connected with the negative electrode. Under the action of an external electric field, a positive charging process is started, and lithium ions begin to be extracted from a positive plate coated with a lithium-rich material on the anode side and enter a circularly flowing lithium-rich liquid; on the cathode side, lithium ions are inserted from the continuously circulating solution to be extracted into the electrode plate coated with the material in the lithium-deficient state until the set conditions are met, and the forward reaction process is finished. Or for the anode side the lithium extraction process ends, while for the cathode side the lithium insertion process ends.

Reversing:

after the reaction is finished, the liquid in the releasing and embedding groove is firstly respectively discharged into the corresponding accommodating parts. The lithium-rich solution is replaced into a chamber where the lithium-rich solution is located during the last reaction, and meanwhile the lithium-rich solution is placed into the chamber where the lithium-rich solution is located at the last reaction; the polarity of the voltage applied to the electrode plate is reversed, that is, the electrode plate to which the positive voltage is originally applied is changed into the negative voltage, and the electrode plate to which the negative voltage is originally applied is changed into the positive voltage. The reverse reaction process (relative to the reaction process just performed) is started. And finishing the reversing.

Reverse reaction process (relative to the forward reaction process): the lithium-rich liquid flows into a chamber where a positive plate (a negative electrode before switching) is positioned, and is a lithium-rich liquid side (a lithium extraction side), and the positive plate is connected with the positive electrode; the lithium solution to be extracted flows into a chamber where a negative plate (positive electrode before switching) is positioned, and the side (lithium ion embedding side) of the lithium solution to be extracted is connected with the negative electrode. Under the action of an external electric field, starting a reverse (forward relative exchange) charging process, and at the anode side, lithium ions begin to be extracted from a polar plate which is embedded with lithium ions in the previous reaction process and is in a lithium-rich state, and enter a circulating lithium-rich liquid; and (3) at the cathode side, lithium ions are inserted into the electrode plate in the lithium-deficient state from the continuously circulating solution to be subjected to lithium extraction until a set condition is met, and the reverse reaction process is finished. I.e. for the anode side the lithium extraction process ends, while for the cathode side the lithium insertion process ends.

This process is to enrich lithium ions on the lithium-rich liquid side and increase the concentration ratio thereof with respect to magnesium and other impurity ions (or decrease the magnesium-lithium ratio). When the power supply is switched, the lithium-rich liquid and the solution to be extracted are exchanged at the position in the desorption groove correspondingly, and the lithium enrichment in the lithium-rich liquid is realized in a matching way. However, a forward or reverse lithium extraction process works for a relatively long time, which is several hours, during which, in order to increase the reaction effectiveness, the coating material on the electrode plate is specially treated to make the solution more easily enter the coating material, so as to accelerate the reaction, and at the same time, it is also impossible to avoid that the lithium extraction material coated on the cathode contains a lot of lithium solution to be extracted, so that after the reaction lithium extraction process is finished, the lithium-rich solution and the lithium solution to be extracted are released into respective buffer storage tanks, and then the tank body chamber and the circuit just containing the lithium solution to be extracted in the de-intercalation tank are washed with water. For the lithium solution to be extracted with high magnesium-lithium ratio, such as a Qinghai Chevrolene region, the pipeline and the inner part of the chamber are not cleaned, so that the magnesium-lithium ratio and impurity components of the lithium-rich solution are obviously increased, the complexity of subsequent process treatment is increased, and the investment and treatment cost are increased.

And the forward reaction process and the reverse reaction process are circularly repeated, the lithium-rich solution and the solution to be extracted continuously flow in the circulating loop until the reaction meets the set conditions of the process, the lithium-rich solution or the solution to be extracted in the pipeline of the circulating loop and the de-embedding groove is discharged, then the working liquid is injected again, and the next circulating process is started.

Due to the complexity of the reversal process, these problems are not noticed or very well dealt with when valve selection and piping are performed, and after the forward or reverse process is completed, there remains a lot of reaction solution in the two loop pipes: lithium-rich solution and solution to be extracted; liquid can remain in a pipeline loop (containing a control device) flowing through the lithium solution to be extracted before reversing, and the remaining liquid is mixed into the lithium-rich solution after reversing, so that the impurity content in the lithium-rich solution is increased. Therefore, the pipeline arrangement is reasonable, the residual liquid in the pipeline is reduced as much as possible, and the impurity content is reduced by cleaning the pipeline.

The reasonable pipeline arrangement and the implementation of the washing process have the following advantages:

1. the residual reaction liquid in the pipeline loop is less, and the impurity components doped into the lithium-rich liquid after the exchange are less.

2. The cleaning procedure is added or changed, the component amount of the solution to be extracted in the loop (containing the electrode) is further greatly reduced, and the difficulty of slag removal and concentration treatment in the subsequent process is reduced. Because the subsequent treatment process of the mature lithium-rich solution is nanofiltration and reverse osmosis, the deslagging and the concentration are realized, the less the impurity components in the feed liquid supplied by the front-stage process to the rear-stage process are, the simpler the subsequent process is.

After the washing water procedure is added, the procedure of extracting lithium by the electrochemical desorption method is changed into the following procedures: the forward reaction, washing water, reversing, reverse reaction, washing water, reversing, forward reaction and circulation are carried out.

As shown in FIG. 1, when the first reaction process is a forward reaction, the circulation of the solution in the loop is as follows:

the liquid in the lithium solution tank to be extracted is output through a first power device 101, in this embodiment, the power device adopts a pressure pump, and is filtered through a first filtering device 102, and the solution to be treated with a certain pressure enters a first liquid inlet pipeline 15 through a first control device 103 and a first four-way pipeline 104. The liquid is equally distributed to the first pipe structure 151 and the second pipe structure 152 through the first communication pipe 154, the first connection pipe structure 153, the first liquid inlet 11 and the third liquid inlet 13, respectively, and passes through the front end plate 34 of the de-embedding groove, and enters the corresponding pipes of the cathode chamber, and enters the first cathode chamber 31 and the second cathode chamber 33 through the water distribution system, the liquid reaches the upper part of the chamber from the bottom of the chamber, and is evenly collected through the water distribution system, the liquid flows out from the first liquid outlet 110 and the third liquid outlet 130, and merges with the first liquid outlet communication pipe 1502 through the first liquid outlet connection pipe structure 1501, flows through the fifth control device 503 through the first three-way pipe 704, and enters the lithium solution to be extracted tank through the first liquid return control device 61.

The liquid in the lithium-rich solution tank is output through the second power device 301, filtered through the second filtering device 302, and the lithium-rich liquid with a certain pressure passes through the fourth control device 403, the second four-way pipeline 204 and enters the second liquid inlet pipeline 16. Through the second communicating pipe 162, the second connecting pipe 161, the liquid is equally distributed to the third pipe structure 163, the fourth pipe structure 164, the fifth pipe structure 165, the sixth pipe structure 166, the seventh pipe structure 167, and the eighth pipe structure 168, and respectively enters the second liquid inlet 12 and the fourth liquid inlet 14, passes through the front end plate 34 of the de-embedding groove, respectively enters the pipes corresponding to the anode chambers, passes through the water distribution system, enters the first anode chamber 36 and the second anode chamber 32, passes through the bottom of the chamber, reaches the upper part of the chamber, uniformly receives water through the water receiving system, enters the pipes formed by the frame body of the de-embedding groove, passes through the front end plate 34 of the de-embedding groove, flows out from the second liquid outlet 120 and the fourth liquid outlet 140, respectively passes through the first liquid outlet pipe structure 1601 and the second liquid outlet 1602, and is converged to the second liquid outlet communicating pipe 1604 through the second liquid outlet connecting pipe structure 1603, passes through the sixth control device 603, and enters a lithium-rich solution tank through a sixth liquid return control device 66.

A circuit for discharging the lithium solution to be extracted to the lithium tank to be extracted:

after the reaction is finished, the solution to be extracted in the first cathode chamber 31 and the second cathode chamber 33 is collected to the first connecting pipe structure 153 from the first liquid inlet 11 and the third liquid inlet 13 through the water distribution system, the first pipe structure 151 and the second pipe structure 152, enters the first liquid inlet pipeline 15 through the first communicating pipeline 154, passes through the first four-way pipeline 104, passes through the first discharge control device 903 and the fourth liquid return control device 64, and returns to the solution tank to be extracted.

The first release control device 903 and the fourth liquid return control device 64 are controlled to be conducted in the process; controlling the first control device 103, the third control device 303, the fifth liquid return control device 65 and the sixth liquid return control device 66 to be closed;

and (3) discharging the lithium-rich liquid to a lithium-rich liquid tank:

the lithium-rich liquid in the first anode chamber 36 and the second anode chamber 32 enters the corresponding pipeline of the anode chamber through the water distribution system, passes through the front end plate 34 of the de-embedding groove, respectively flows out through the second liquid inlet 12 and the fourth liquid inlet 14, passes through the third pipe structure 163, the fourth pipe structure 164, the fifth pipe structure 165, the sixth pipe structure 166, the seventh pipe structure 167 and the eighth pipe structure 168, is collected to the second connecting pipe structure 161, passes through the second communicating pipe 162, enters the second liquid inlet pipeline 16, passes through the second four-way pipe 204, passes through the second discharge control device 1003 and the third liquid return control device 63, and returns to the lithium-rich liquid tank.

In the process, the second discharge control device 1003 and the third liquid return control device 63 are controlled to be conducted; controlling the second control device 203, the fourth control device 403, the first liquid return control device 61 and the second liquid return control device 62 to be closed;

the working process of the washing procedure is as follows:

the washing water in the washing tank is output through the third power device 701, filtered through the third filtering device 702, and the washing water with a certain pressure passes through the seventh control device 703, the first three-way pipeline 704, and the first liquid outlet pipeline 150. The liquid is equally distributed to the eighth liquid outlet pipe structure 1508, the seventh liquid outlet pipe structure 1507, the sixth liquid outlet pipe structure 1506, the fifth liquid outlet pipe structure 1505, the fourth liquid outlet pipe structure 1504 and the third liquid outlet pipe structure 1503 through the first liquid outlet communication pipeline 1502 and the first liquid outlet connecting pipe structure 1501, respectively enters the first liquid outlet 110 and the third liquid outlet 130, respectively, passes through the pipeline at the upper part of the front end plate 34 of the de-embedding groove, respectively enters the corresponding pipeline formed by the frame body, respectively enters the first cathode chamber 31 and the second cathode chamber 33 through the water distribution and distribution system, reaches the lower part of the chamber from the upper part of the chamber, uniformly collects water through the water distribution system at the lower part, enters the pipeline formed by the frame body of the de-embedding groove, flows out through the first liquid inlet 11 and the third liquid inlet 13 at the lower part of the front end plate 34 of the de-embedding groove, respectively passes through the first pipe structure 151 and the second pipe structure 152, and is converged, and returns to the washing water tank through a first discharge control device 903 and a fifth liquid return control device 65 through a first four-way pipeline 104. Then, the fifth control device 503 is opened to clean the fifth pipeline 50 through which the lithium solution to be extracted flows last time, and the washing water is returned to the washing water tank through the second liquid return control device 62.

In this embodiment, when the upper washing water mode is adopted, the control mode of the control device in the forward reaction process is as follows:

in the process, when the solution to be extracted is pumped out of the solution to be extracted into the first control device 103 through the first power device 101 in the circulation loop of the solution to be extracted, the first control device 103 is controlled to be switched on, and the third control device 303 and the first discharge control device 903 are controlled to be switched off. The solution to be extracted enters the cathode slot unit of the de-intercalation slot to participate in the reaction, and meanwhile, the solution continuously flows out of the cathode slot unit through a pipeline formed by the slot body plate frame, the seventh control device 703 is controlled to be closed, the solution passes through the fifth control device 503 and is controlled to be conducted at the same time, the solution reaches the first liquid return control device 61 along the fifth pipeline 50, the first liquid return control device 61 is controlled to be conducted, the second liquid return control device 62 and the third liquid return control device 63 are closed, the second discharge control device 1003 is closed, and the solution to be extracted is guaranteed to flow back to the solution tank to be extracted. The seventh control device 703 is controlled to be turned off to prevent the lithium solution to be extracted from entering the washing water tank and causing liquid mixing.

Meanwhile, in the lithium-rich liquid circulation loop, when the lithium-rich liquid is pumped out of the lithium-rich liquid tank through the second power device 301 and enters the fourth control device 403, the second control device 203 and the second discharge control device 1003 are controlled to be closed when the fourth control device 403 is controlled to be switched on; so as to keep the lithium-rich liquid solution to enter the anode tank unit of the de-intercalation tank and generate oxidation reaction with the electrode plate, the removed lithium ions enter the lithium-rich solution, meanwhile, the lithium-rich liquid continuously flows out from the anode tank unit through the tank body plate frame forming pipeline, along the sixth pipeline 60, the eighth control device 803 is controlled to be closed, the solution passes through the sixth control device 603 and is controlled to be switched on, the solution passes through the sixth pipeline 60 and then goes back to the sixth liquid return control device 66, the control is switched on, the fourth liquid return control device 64 and the fifth liquid return control device 65 are closed, and the first release control device 903 is closed to ensure that the lithium-rich liquid flows back to the lithium-rich liquid tank. The eighth control device 803 is controlled to be closed to prevent the lithium-rich solution from entering the washing water tank and causing liquid mixing.

In the reverse reaction corresponding to the first reaction process, the solution circulation process in the loop is as follows:

the liquid in the lithium solution tank to be extracted is output through the first power device 101, filtered through the first filtering device 102, the solution to be treated with a certain pressure passes through the second control device 203, the second four-way pipe 204, enters the second liquid inlet pipe 16, evenly distributes the liquid to the fifth pipe structure 165, the fourth pipe structure 164, the third pipe structure 163, the sixth pipe structure 166, the seventh pipe structure 167 and the eighth pipe structure 168 through the second communication pipe 162 and the second connecting pipe structure 161, respectively enters the second liquid inlet 12 and the fourth liquid inlet 14, passes through the front end plate 34 of the de-embedding groove, respectively enters the corresponding pipes of the cathode (original anode) chamber, passes through the water distribution system, enters the cathode (original anode) chamber, passes through the first anode chamber 36 and the second anode chamber 32, reaches the upper part of the chamber from the bottom of the chamber, uniformly receives the water through the water receiving system, and flows out from the second liquid outlet 120 and the fourth liquid outlet 140, respectively through first liquid outlet pipe structure 1601, second liquid outlet pipe structure 1602, merge in second liquid outlet communicating pipe 1604 through second liquid outlet connecting pipe structure 1603, pass through second three way pipe 804, flow through sixth controlling means 603, get into the lithium liquid jar of treating through fourth liquid return controlling means 64.

The liquid in the lithium-rich solution tank is output through the second power device 301, filtered through the second filtering device 302, and the lithium-rich liquid with a certain pressure passes through the third control device 303, the first four-way pipeline 104 and the first liquid inlet pipeline 15. Through the first communicating pipe 154 and the first connecting pipe structure 153, the liquid is equally distributed to the first pipe structure 151 and the second pipe structure 152, respectively enters the first liquid inlet 11 and the third liquid inlet 13, passes through the front end plate 34 of the de-embedding groove, respectively enters the corresponding pipe of the anode (original cathode) chamber, passes through the water distribution system, enters the anode chamber (original cathode) chamber, namely the first cathode chamber 31 and the second cathode chamber 33, reaches the upper part of the chamber from the bottom of the chamber, uniformly receives water through the water receiving system, enters the pipe formed by the de-embedding groove frame body, flows out from the second liquid outlet 120 and the fourth liquid outlet 140 through the front end plate 34 of the de-embedding groove, respectively passes through the third liquid outlet pipe structure 1503, the fourth liquid outlet pipe structure 1504, the fifth liquid outlet pipe structure 1505, the sixth liquid outlet pipe structure 1506, the seventh liquid outlet pipe structure 1507 and the eighth liquid outlet pipe structure 1508, and merges into the first liquid outlet communicating pipe structure 1501, through a first three-way line 704, through a fifth control device 503, through a third liquid return control device 63, and into the lithium-rich liquid tank.

And (3) discharging the lithium-rich liquid to a lithium-rich liquid tank: :

after the reaction is finished, the lithium-rich liquid in the first cathode chamber 31 and the second cathode chamber 33 is collected to the first connecting pipe structure 153 from the first liquid inlet 11 and the third liquid inlet 13 through the water distribution system, the first pipe structure 151 and the second pipe structure 152, enters the first liquid inlet pipeline 15 through the first communicating pipeline 154, passes through the first four-way pipeline 104, passes through the first drain control device 903 and the sixth liquid return control device 66, and returns to the lithium-rich liquid tank.

The process controls the conduction of the first release control device 903 and the sixth liquid return control device 66; controlling the first control device 103, the third control device 303, the fifth liquid return control device 65 and the fourth liquid return control device 64 to be closed;

a circuit for discharging the lithium solution to be extracted to the lithium tank to be extracted:

the solution to be subjected to lithium extraction in the first anode chamber 36 and the second anode chamber 32 enters the corresponding pipeline of the anode chamber through the water distribution system, passes through the front end plate 34 of the de-embedding groove, respectively flows out through the second liquid inlet 12 and the fourth liquid inlet 14, passes through the third pipe structure 163, the fourth pipe structure 164, the fifth pipe structure 165, the sixth pipe structure 166, the seventh pipe structure 167 and the eighth pipe structure 168, is collected to the second connecting pipe structure 161, passes through the second communicating pipeline 162, enters the second liquid inlet pipeline 16, passes through the second four-way pipeline 204, passes through the second discharge control device 1003 and the first liquid return control device 61, and returns to the solution tank to be subjected to lithium extraction.

The process controls the conduction of the second bleeding control device 1003 and the first liquid return control device 61; the second control device 203, the fourth control device 403, the third liquid return control device 63 and the second liquid return control device 62 are controlled to be closed;

the subsequent washing process comprises the following steps: the washing water in the water washing tank is output by the third power device 701, filtered by the third filtering device 702, and the washing water with a certain pressure passes through the eighth control device 803, the second three-way pipeline 804, the second liquid outlet pipeline 160, the second liquid outlet communication pipeline 1604, the second liquid outlet connecting pipeline 1603 to equally distribute the liquid to the first liquid outlet pipe structure 1601, the second liquid outlet pipe structure 1602, respectively enter the second liquid outlet 120 and the fourth liquid outlet 140, pass through the upper pipeline of the front end plate 34 of the de-embedding groove, respectively enter the corresponding pipelines formed by the frame body, pass through the water distribution system to enter the cathode cavities, namely the first anode cavity 36 and the second anode cavity 32, and reach the lower part of the cavity from the upper part of the cavity, uniformly receive the water by the lower water distribution system, pass through the pipeline formed by the frame body of the de-embedding groove, pass through the second liquid inlet 12 at the lower part of the front end plate 34 of the de-embedding groove, The fourth liquid inlet 14 flows out, and passes through a third pipe structure 163, a fourth pipe structure 164, a fifth pipe structure 165, a sixth pipe structure 166, a seventh pipe structure 167, and an eighth pipe structure 168, and merges with the second communication pipe 162 through a second connecting pipe structure 161, and enters the wash tank through a second bleed control device 1003 and a second liquid return control device 62 through a second four-way pipe 204. Then, the sixth control device 603 is opened, the sixth pipeline 60 through which the lithium solution to be extracted flows last time is cleaned, and the washing water returns to the washing water tank through the fifth liquid return control device 65.

The sixth control device 603 is opened to purge the part of the piping through which the lithium solution to be extracted flows to the lithium solution storage part. The first anode chamber 36 and the second anode chamber 32 and associated other circuits are then cleaned.

When the valve is used in practice, the control device can select a manual or automatic control valve, and when the type of the control valve is selected, only the valve with the lowest end of the opening and closing movable part of the valve inlet and the valve outlet and the lowest end of the pipeline inlet and the pipeline outlet almost at the same level can be selected, so that the inlet and the outlet of water are kept completely without residual liquid. Due to the structure, after the stop valve and the diaphragm valve are opened and closed, if the installation direction is not noticed, liquid with a certain height can be remained in the valve, and meanwhile, due to the functional structure, the check valve cannot be electrically or pneumatically controlled, and is preferably an electrically or pneumatically controlled gate valve, a butterfly valve and a plug valve.

Example two:

different from the first embodiment, in the present embodiment, the third liquid inlet system is configured as a lower water washing system, fig. 5 is a schematic structural diagram of the present embodiment, as shown in fig. 5, the third liquid inlet system at least includes a seventh pipeline 70 and an eighth pipeline 80, the third liquid outlet system at least includes a fifth pipeline 50 and a sixth pipeline 60, and the third drain system at least includes a first drain pipeline 90 and a second drain pipeline 100.

Wherein, one end of the seventh pipeline 70 is connected with the liquid outlet of the washing water portion 4, the other end of the seventh pipeline 70 is connected with the first liquid inlet pipeline 15, one end of the eighth pipeline 80 is connected to the seventh pipeline 70, and the other end of the eighth pipeline 80 is connected with the second liquid inlet pipeline 16.

One end of the fifth pipeline 50 is connected with the first liquid outlet pipeline 150, and the other end of the fifth pipeline 50 is connected with the water washing part 4 through the second liquid return pipeline; one end of the sixth pipeline 60 is connected to the second liquid outlet pipeline 160, and the other end of the sixth pipeline 60 is connected to the water washing unit 4 through the fifth liquid return pipeline.

In this embodiment, the third connecting device is a first three-way pipeline 704, and the seventh pipeline 70, the first liquid inlet pipeline 15, and the first drain pipeline 90 are all connected to the first three-way pipeline 704; the fourth connecting device is a second three-way pipeline 804, and the eighth pipeline 80, the second liquid inlet pipeline 16 and the second bleed pipeline 100 are all connected with the second three-way pipeline 804.

For the forward reaction, the washing process of the lower washing water is as follows:

the washing water in the washing tank is output by the third power device 701, filtered by the third filtering device 702, the washing water with certain pressure passes through the seventh control device 703, the first three-way pipeline 704 and the first four-way pipeline 104, enters the first liquid inlet pipeline 15, passes through the first communicating pipeline 154, evenly distributes the liquid to the first pipe structure 151 and the second pipe structure 152 by the first connecting pipe structure 153, respectively enters the first liquid inlet 11 and the third liquid inlet 13, passes through the pipeline at the lower part of the front end plate 34 of the de-embedding groove, respectively enters the corresponding pipelines formed by the frame body, passes through the water distribution system, enters the first cathode chamber 31 and the second cathode chamber 33, reaches the upper part of the chamber from the lower part of the chamber, evenly receives the water by the water distribution system at the upper part, enters the pipeline formed by the frame body of the de-embedding groove, and flows out through the outlets of the first liquid outlet 110 and the third liquid outlet 130 at the upper part of the front end plate 34 of the, the water respectively passes through a third liquid outlet pipe structure 1503, a fourth liquid outlet pipe structure 1504, a fifth liquid outlet pipe structure 1505, an eighth liquid outlet pipe structure 1508, a seventh liquid outlet pipe structure 1507 and a sixth liquid outlet pipe structure 1506, and is converged in a first liquid outlet communication pipeline 1502 through a first liquid outlet connecting pipe structure 1501, passes through a fifth pipeline 50, and enters the water washing tank through a liquid return second liquid return control device 62.

For the reverse reaction, the washing process of the lower washing water is as follows:

the washing water in the washing tank is output by the third power device 701, filtered by the third filtering device 702, and the washing water with certain pressure passes through the eighth control device 803, the second three-way pipeline 804 and the second four-way pipeline 204, enters the second liquid inlet pipeline 16, passes through the second communication pipeline 162, the second connecting pipeline 161, and evenly distributes liquid to the fifth pipeline structure 165, the fourth pipeline structure 164, the third pipeline structure 163, the sixth pipeline structure 166, the seventh pipeline structure 167 and the eighth pipeline structure 168, respectively enters the second liquid inlet 12 and the fourth liquid inlet 14, passes through the lower pipeline of the front end plate 34 of the de-caulking groove, respectively enters the corresponding pipelines formed by the frame bodies, passes through the water distribution system, enters the cathode cavity, namely the first anode cavity 36 and the second anode cavity 32, passes through the lower part of the cavity, reaches the upper part of the cavity, evenly receives water by the upper water distribution system, and enters the pipelines formed by the de-caulking groove frame bodies, the second liquid outlet 120 and the fourth liquid outlet 140 which pass through the upper part of the front end plate 34 of the de-embedding groove flow out respectively through the first liquid outlet pipe structure 1601, the second liquid outlet pipe structure 1602, the second liquid outlet connecting pipe structure 1603, join the second liquid outlet communicating pipe 1604, pass through the sixth pipe 60, and enter the water washing tank through the fifth liquid return control device 65.

The valve control mode of the lower washing mode is adopted:

in the process, in the circulation loop of the lithium solution to be extracted, when the lithium solution to be extracted is pumped out of the lithium solution tank to be extracted through the first power device 101 and enters the first control device 103, the first control device 103 is controlled to be switched on, and the second control device 203, the third control device 303 and the first discharge control device 903 are controlled to be switched off; and the solution to be extracted enters the cathode tank unit of the de-intercalation tank to participate in the lithium intercalation reaction, and meanwhile continuously flows out of a pipeline formed by the cathode tank unit through the tank body plate frame, and flows to the first liquid return control device 61 along the fifth pipeline 50, the first liquid return control device 61 is controlled to be switched on, the second liquid return control device 62 and the third liquid return control device 63 are controlled to be switched off, and the second discharge control device 1003 is controlled to be switched off, so that the solution to be extracted is ensured to flow back to the solution tank to be extracted.

Meanwhile, in the lithium-rich liquid circulation loop, when the lithium-rich liquid is pumped out of the lithium-rich liquid tank through the second power device 301 and enters the fourth control device 403, when the fourth control device 403 is controlled to be switched on, the second control device 203, the third control device 303 and the eighth control device 803 are controlled to be switched off, and the second discharge control device 1003 is also controlled to be kept switched off; so as to keep rich lithium liquid solution to get into and take off and inlay groove anode slot unit, the lithium ion that deviates from gets into rich lithium solution, has rich lithium liquid to form the pipeline outflow through the cell body sheet frame from groove anode slot unit constantly simultaneously, along sixth pipeline 60, to sixth liquid controlling means 66 that returns, sixth liquid controlling means 66 switches on, and fourth liquid controlling means 64, fifth liquid controlling means 65 that returns close to guarantee that rich lithium liquid flows back in the rich lithium fluid tank.

Example three:

different from the first embodiment and the second embodiment, the disengaging grooves in the present embodiment are arranged to include at least two disengaging grooves connected in series, the third circulating system further includes a series pipeline, the liquid outlet of the previous disengaging groove is connected with the liquid inlet of the next disengaging groove adjacent to the previous disengaging groove through the series pipeline, a control device is arranged on the series pipeline, the liquid inlet of each disengaging groove is respectively connected with a discharge pipeline, and a control device is arranged on the discharge pipeline.

In actual use, in order to reduce the investment of lithium extraction by an electrochemical desorption method, the investment of public equipment is reduced, such as public accessory equipment: the lithium-rich liquid circulating pump, the lithium solution circulating pump to be extracted, the water washing pump, the control valve and the like can adopt the operation mode that a plurality of de-embedding grooves are connected in series, and the number of the series connection and the number of the liquid inlets and the liquid outlets are all set according to the actual use requirement.

When the series connection operation, the arrangement mode of each de-embedding groove body can be selected according to the actual use requirement, if the arrangement mode adopts an upper layer or a lower layer or a plurality of layers, the arrangement mode can also adopt a parallel side-by-side arrangement mode, if the arrangement mode adopts an upper layer or a lower layer or a plurality of layers, the arrangement mode can select the upper layer de-embedding groove to set or not set a discharge pipeline, when the discharge pipeline is not set, the liquid discharge speed can be slowed down, but the effect of the washing process is not influenced.

In this embodiment, a side-by-side arrangement is employed, and preferably, a bleed line is provided. The arrangement of the third discharge pipeline 7 and the fourth discharge pipeline 8 increases a liquid discharge channel of the series connection de-embedding groove, reduces the discharge time of the solution in the series connection de-embedding groove, and improves the working efficiency.

As an alternative implementation manner, in the present embodiment, two de-intercalation tanks are provided, including the first de-intercalation tank 1a and the first de-intercalation tank 1b, the serial pipeline is provided to include the first serial pipeline 5 and the second serial pipeline 6, and the first liquid outlet 113 of the first de-intercalation tank is connected to the second liquid inlet 122 of the second de-intercalation tank through the second serial pipeline 6;

the second liquid outlet 114 of the first de-embedding groove is connected with the first liquid inlet 121 of the second de-embedding groove through a first series pipeline 5, the first series pipeline 5 is provided with an eleventh control device 1103, and the second series pipeline 6 is provided with a twelfth control device 1203.

The first inlet 121 of second disengagement and embedding groove and the second inlet 122 of second disengagement and embedding groove connect respectively third bleed pipeline 7 and fourth bleed pipeline 8, and the third bleed pipeline 7 is connected the washing portion through second liquid return pipeline, and the fourth bleed pipeline 8 is connected the washing portion 4 through fifth liquid return pipeline, sets up third bleed controlling means 1303 on the third bleed pipeline 7, sets up fourth bleed controlling means 1403 on the fourth bleed pipeline 8.

Because the lithium-rich liquid and the lithium solution to be extracted are fed from the lower liquid inlet of the de-embedding groove, and discharged from the upper liquid outlet, the two de-embedding grooves operate in series, and then the two de-embedding grooves operate in series, so that the two liquid in series enters the second liquid inlet 122 of the corresponding second de-embedding groove and the first liquid inlet 121 of the corresponding second de-embedding groove from the first liquid outlet 113 of the first de-embedding groove and the second liquid outlet 114 of the first de-embedding groove respectively, and flows back to the corresponding tank body through the first liquid outlet 123 of the second de-embedding groove and the second liquid outlet 124 of the second de-embedding groove. Except for the washing water loop, the loop liquid circulation of the forward reaction process and the reverse reaction process is the same as the arrangement of a de-embedding groove pipeline and a control device.

The two de-caulking grooves 1 are connected in series to run in a reversing process, and the requirements that a circulation loop is not mixed and the residual liquid in the loop is less are also met. To add third and fourth bleed control means 1303, 1403 of the second slip bowl 1b as control means for the liquid bleed passage in the second slip bowl 1 b. After each process reaction is finished, firstly, the liquid in the first de-embedding groove 1a, the second de-embedding groove 1b and the groove cavity is discharged and flows back to the corresponding reaction buffer intermediate storage tank, so that the washing water process operation can be carried out, preparation is made for the further reversing process, and meanwhile, when washing water is carried out, in order to promote washing water with pressure to enter the second de-embedding groove 1b, the cavity of the de-embedding groove and the like is cleaned, the third discharge control device 1303 and/or the fourth discharge control device 1403 must be closed. Otherwise, the washing water is directly discharged into the washing water tank without passing through the second disentangling groove 1 b.

Specifically, fig. 6 is a schematic structural diagram of the present embodiment, as shown in fig. 6, the third liquid inlet system is configured as an upper washing water system, and includes a seventh pipeline 70 and an eighth pipeline 80, the third liquid outlet system includes a fifth pipeline 50 and a sixth pipeline 60, and the third bleed system includes a first bleed pipeline 90, a second bleed pipeline 100, a third bleed pipeline 7, and a fourth bleed pipeline 8.

Wherein: the second washing water inlet pipe 70a and the fourth washing water inlet pipe 70b are both connected to the seventh pipe 70; the first wash water inlet line 80a and the third wash water inlet line 80b are both connected to the eighth line 80.

The second liquid outlet 114 of the first de-embedding groove is connected with the seventh pipeline 70 through a second washing water liquid inlet pipeline 70a, the first liquid outlet 113 of the first de-embedding groove is connected with the eighth pipeline 80 through a first washing water liquid inlet pipeline 80a,

the first liquid outlet 123 of the second de-embedding groove is connected with the eighth pipeline 80 through a third washing water liquid inlet pipeline 80b, and the second liquid outlet 124 of the second de-embedding groove is connected with the seventh pipeline 70 through a fourth washing water liquid inlet pipeline 70 b;

the first outlet 123 of the second de-embedding groove is connected with the sixth pipeline 60, and the second outlet 124 of the second de-embedding groove is connected with the fifth pipeline 50.

The first liquid inlet 111 of the first de-embedding groove and the second liquid inlet 112 of the first de-embedding groove are respectively connected with the first discharge pipeline 90 and the second discharge pipeline 100, the first discharge pipeline 90 is connected with the water washing part 4 through the fifth liquid return pipeline, and the second discharge pipeline 100 is connected with the water washing part 4 through the second liquid return pipeline.

Taking the case that the solution to be extracted flows through the first liquid inlet 111 of the first desorption tank before the washing process of the first desorption tank 1a is started as an example: before the washing water is used for washing the de-embedding groove, the liquid return pipeline is firstly washed, and then the de-embedding groove is washed. Namely: controlling the conduction of the seventh control device 703, the eleventh control device 1103, the third discharge control device 1303 and the second liquid return control device 62 of the valve, and cleaning the first series pipeline 5 corresponding to the first de-embedding groove 1 a; meanwhile, the fifth control device 503 is also controlled to be conducted to clean the fifth pipeline 50 corresponding to the first desorption groove 1b, and then the eleventh control device 1103 and the fifth control device 503 are closed to start cleaning the first desorption groove 1a and the first desorption groove 1 b.

The washing water in the washing water tank is guided by the seventh control device 703 to enter the second liquid outlet 114 of the first de-embedding groove and the second liquid outlet 124 of the second de-embedding groove through the seventh pipeline 70, respectively, and the eleventh control device 1103 is turned off in order to avoid the washing water entering the first de-embedding groove 1a from being discharged along the first serial pipeline 5.

Loop on the first disengaging groove 1a through which the washing water passes: enters the groove body of the first de-embedding groove 1a from the second liquid outlet 114 of the first de-embedding groove through the seventh control device 703, the seventh pipeline 70 and the second washing water inlet pipeline 70a, flows out, then enters the first liquid inlet pipeline 15, the first four-way pipeline 104, the first discharge control device 903, the first discharge pipeline 90 and the fifth liquid return control device 65, and returns to the washing water tank.

Loop on the second disengagement groove 1b through which the washing water passes: enters the second de-embedding groove 1b from the second liquid outlet 124 of the second de-embedding groove through the seventh control device 703 and the seventh pipeline 70, flows out of the second de-embedding groove, enters the third discharging pipeline 7, the third discharging control device 1303, the second liquid return control device 62 and returns to the water washing tank. To avoid the wash water entering the second disengagement groove 1b from draining along the fifth pipeline 50, the fifth control means 503 is turned off;

the washing step is carried out in the reverse reaction to the forward reaction as follows:

before washing the water to wash the de-embedding groove, firstly controlling the eighth control device 803, the twelfth control device 1203, the fourth discharge control device 1403 and the fifth liquid return control device 65 to be conducted, keeping a washing water loop smooth, and washing the corresponding second serial pipeline 6 of the first de-embedding groove 1 a; and meanwhile, the sixth control device 603 is also controlled to be conducted to clean the sixth pipeline 60 corresponding to the first release groove 1 b. Then, the twelfth control means 1203 and the sixth control means 603 are closed, and the cleaning of the first and second desorption grooves 1a and 1b is started.

Loop on the first disengaging groove 1a through which the washing water passes: the eighth control device 803, the first washing water inlet pipeline 80a, the first liquid outlet 113 from the first de-embedding groove, the first de-embedding groove 1a, the second liquid inlet pipeline 16, the second four-way pipeline 204, the second discharge pipeline 100, the second discharge control device 1003 and the second liquid return control device 62, and the second liquid return control device 62. In order to avoid that the washing water entering the first de-embedding groove 1a is drained along the second series pipeline 6, the twelfth control device 1203 is closed;

loop on the second disengagement groove 1b through which the washing water passes: the eighth control device 803, the second washing water inlet pipeline 80b, the first liquid outlet 123 from the second de-embedding tank, the second de-embedding tank 1b, the fourth discharge pipeline 8, the fourth discharge control device 1403, the fifth liquid return control device 65 after flowing out, and returning to the washing water tank. To avoid the wash water entering the second disengagement groove 1b from draining along the sixth pipeline 60, the sixth control means 603 is closed;

for the washing process of the upper washing mode, the upper washing water under pressure flows through the water distribution structure to enter the cavity of the de-embedding groove, the water distribution structure plays a role in water distribution, and the water flows wash the internal parts such as the cavity and the electrode plate immersed with the lithium solution to be extracted and finally flows out from a liquid outlet at the bottom of the de-embedding groove. Because the clean water always first faces the chamber and the electrode plates that were previously washed with the wash water, the plates are easily cleaned.

Correspondingly, four control devices are added in the auxiliary assembly for each additional series operation of the de-caulking groove.

In the case of operation of a plurality of stripping cells working in series, replacement or withdrawal of operation is necessary if one of the stripping cells fails for large-scale production. When the production line is withdrawn from operation, in order to ensure the continuous operation of the original production line, a loop between the liquid inlet and the liquid outlet of the disengagement groove needs to be bypassed, and a loose joint or quick joint pipe fitting is correspondingly added in a related loop, so that the loop can be quickly constructed to restore a path, the production is quickly restored, and the production line shutdown time is shortened.

By taking fig. 6 as an example, after the first disengaging groove is withdrawn, the first liquid inlet pipeline 15 is short-circuited with the first serial pipeline 5, the second liquid inlet pipeline 16 is short-circuited with the second serial pipeline 6, and loose joint or quick-connection pipe fittings are respectively added between the first liquid inlet pipeline 15 and the first serial pipeline 5 and between the second liquid inlet pipeline 16 and the second serial pipeline 6.

Example four:

the third difference from the third embodiment is that the third liquid inlet system in this embodiment is configured as a lower washing system, wherein, when two de-intercalation tanks work in series, the connection mode of the valve and the pipeline arrangement valve through which the lithium-rich liquid and the solution to be extracted circulate in the loop and the working process of the positive and negative working processes and the working process of the upper washing mode are basically the same, and the washing control process and the loop are slightly different:

fig. 7 is a schematic structural diagram of the present embodiment, and as shown in fig. 7, the third liquid inlet system includes a seventh pipeline 70 and an eighth pipeline 80, the third liquid outlet system includes a fifth pipeline 50 and a sixth pipeline 60, and the third bleed system includes a first bleed pipeline 90, a second bleed pipeline 100, a third bleed pipeline 7, and a fourth bleed pipeline 8.

Wherein, the first liquid inlet 111 of the first de-embedding groove is connected with the seventh pipeline 70 through the first liquid inlet pipeline 15, and the second liquid inlet 112 of the first de-embedding groove is connected with the eighth pipeline 80 through the second liquid inlet pipeline 16; the first outlet 123 of the second de-embedding groove is connected with the sixth pipeline 60, and the second outlet 124 of the second de-embedding groove is connected with the fifth pipeline 50.

The first liquid inlet 121 of the second de-embedding groove is connected with the second liquid outlet 114 of the first de-embedding groove through a first serial pipeline 5, and the second liquid inlet 122 of the second de-embedding groove is connected with the first liquid outlet 113 of the first de-embedding groove through a second serial pipeline 6. Simultaneously, the inlet also acts as the relief mouth of the chamber of the relief de-embedding groove, i.e. the first inlet 121 of the second de-embedding groove is connected with the water washing part 4 through the third relief pipeline 7, and the second inlet 122 of the second de-embedding groove is connected with the water washing part 4 through the fourth relief pipeline 8. A third bleed control means 1303 is provided on the third bleed line 7 and a fourth bleed control means 1403 is provided on the fourth bleed line 8.

Because rich lithium liquid and treat that it dissolves from taking off the characteristics of groove lower part inlet feed liquid, upper portion play liquid to be rich lithium liquid promptly, two take off the caulking groove series connection just liquid flows into two inlets of corresponding second take off caulking groove 1b respectively from two liquid outlets of first take off caulking groove 1a promptly: the first liquid inlet 121 of the second de-embedding groove and the second liquid inlet 122 of the second de-embedding groove respectively flow out from the second liquid outlet 124 of the second de-embedding groove and the first liquid outlet 123 of the second de-embedding groove, and then flow back into the corresponding tank body. The forward and reverse process loop liquid circulation is the same as a de-caulking tank piping arrangement and valve arrangement, except for the wash water loop.

In washing, the third drain control means 1303 and/or the fourth drain control means 1403 are/is closed to perform a washing operation of the desorption tank chamber or the like in order to force the washing water under pressure into the second desorption tank 1 b.

For the lower washing water, the fresh washing water entering from the bottom of the lower liquid inlet is always polluted by the mixed liquid of the previous washing water and the residual liquid, and the solution containing the impurities washes other parts in the groove body which needs to be washed next and contains the same impurity components, and finally flows out from the upper liquid outlet. Compared with the upper washing mode, the lower washing mode is not easy under the same pressure, and the lower washing mode needs more water.

Accordingly, every additional slip tank is operated in series, 2 additional control devices are added to the auxiliary equipment.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

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Lithium extraction system by electrochemical de-intercalation method

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