阅读说明：本技术 一种适用于电解铜废液再生回用的扩散渗析膜分离系统 (Diffusion dialysis membrane separation system suitable for electrolytic copper waste liquid regeneration and reuse ) 是由 朱团团 于 2019-11-05 设计创作，主要内容包括：本发明提供了一种适用于电解铜废液再生回用的扩散渗析膜分离系统包括废液酸度回调装置和膜分离装置。其中,所述废液酸度回调装置包括将电解铜废液酸浓度调至不大于500g/L的回调罐。所述膜分离装置包括基本结构单元；所述基本结构单元由一张阴离子膜隔开,形成渗析室和扩散室；所述膜分离装置采用逆流操作,在所述阴离子均相膜的两侧分别通入废酸液及接受液,利用扩散渗析原理分离出再生酸液。本发明采用采用独特、先进的扩散渗析膜分离技术处理此类已通过蒸发和过滤处理将镍、铁、铝等金属回收的电解液废液,可再生至铜电解槽循环使用,极大节约了企业成本,提高了生产效率。(The invention provides a diffusion dialysis membrane separation system suitable for recycling electrolytic copper waste liquid, which comprises a waste liquid acidity callback device and a membrane separation device. Wherein, the waste liquor acidity callback device comprises a callback tank for adjusting the acid concentration of the electrolytic copper waste liquor to be not more than 500 g/L. The membrane separation device comprises a basic structural unit; the basic structural unit is separated by an anionic membrane to form a dialysis chamber and a diffusion chamber; the membrane separation device adopts countercurrent operation, waste acid liquid and receiving liquid are respectively introduced into two sides of the anion homogeneous phase membrane, and the regenerated acid liquid is separated by utilizing the diffusion dialysis principle. The invention adopts a unique and advanced diffusion dialysis membrane separation technology to treat the electrolyte waste liquid which is obtained by recovering metals such as nickel, iron, aluminum and the like through evaporation and filtration treatment, and the electrolyte waste liquid can be regenerated to a copper electrolytic tank for recycling, thereby greatly saving the enterprise cost and improving the production efficiency.)

1. The utility model provides a diffusion dialysis membrane separation system suitable for electrolytic copper waste liquid regeneration, its characterized in that: comprises a waste liquid acidity adjusting device and a membrane separation device; wherein the content of the first and second substances,

the waste liquid acidity adjusting device comprises an adjusting tank for adjusting the acid concentration of the electrolytic copper waste liquid to be not more than 500g/L, and adjusting the acidity of the electrolyte waste liquid to meet the condition of diffusion dialysis;

the membrane separation device comprises a basic structural unit; the basic structural unit is separated by an anionic membrane to form a dialysis chamber and a diffusion chamber; the membrane separation device adopts countercurrent operation, and waste acid solution and receiving solution are respectively introduced into two sides of the anion homogeneous membrane; the concentration of the waste acid liquid side is far higher than that of the receiving liquid side; one end of the diffusion chamber of the membrane separation device for recovering acid is connected with the electrolytic copper tank and is used for receiving the regenerated acid solution; one end of the residual liquid separated by the dialysis chamber of the membrane separation device is connected with a waste liquid pool and is used for recycling the metal ion residual liquid.

2. The diffusion dialysis membrane separation system suitable for the regeneration and reuse of electrolytic copper waste liquid according to claim 1, characterized in that: the anion membrane is an acid-resistant anion homogeneous exchange membrane.

3. The diffusion dialysis membrane separation system suitable for the regeneration and reuse of electrolytic copper waste liquid according to claim 1, characterized in that: the receiving liquid is tap water and is supplied with water by a high-level water tank.

Technical Field

The invention relates to the field of electrolytic copper, in particular to a diffusion dialysis membrane separation system suitable for regenerating and recycling electrolytic copper waste liquid.

Background

In the production of electrolytic copper, a large amount of waste electrolyte is generated in the production process of the electrolytic copper, the electrolyte mainly contains sulfuric acid, various metal ions and a small amount of organic matters, the prior art recovers metals such as nickel, iron and aluminum through evaporation and filtration treatment, and simultaneously reduces waste liquid, but the amount of waste liquid generated every day is quite large, an acid-base neutralization method is mainly adopted in the current market, a large amount of solid waste is generated, and the later-stage environment-friendly treatment cost is very high.

On the other hand, environmental management is being enhanced by environmental management departments in China, and enterprises are strived to avoid or reduce environmental pollution and damage.

Disclosure of Invention

The invention provides a diffusion dialysis membrane separation system suitable for recycling electrolytic copper waste liquid, which solves the problem of treatment of waste liquid obtained by recovering metals such as nickel, iron, aluminum and the like through evaporation and filtration treatment in electrolytic copper production.

To achieve the purpose, the invention provides a diffusion dialysis membrane separation system suitable for regenerating and recycling electrolytic copper waste liquid, which comprises a waste liquid acidity callback device and a membrane separation device.

The waste liquid acidity adjusting device comprises an adjusting tank for adjusting the acid concentration of the electrolytic copper waste liquid to be not more than 500g/L, and the acidity of the electrolyte waste liquid is adjusted to meet the condition of diffusion dialysis.

The membrane separation device comprises a basic structural unit; the basic structural unit is separated by an anionic membrane to form a dialysis chamber and a diffusion chamber; the membrane separation device adopts countercurrent operation, and waste acid solution and receiving solution are respectively introduced into two sides of the anion homogeneous membrane; the concentration of the waste acid liquid side is far higher than that of the receiving liquid side; one end of the diffusion chamber of the membrane separation device for recovering acid is connected with the electrolytic copper tank and is used for receiving the regenerated acid solution; one end of the residual liquid separated by the dialysis chamber of the membrane separation device is connected with a waste liquid pool and is used for recycling the metal ion residual liquid.

Preferably, the anion membrane is an acid-resistant anion homogeneous exchange membrane.

Preferably, the receiving liquid is tap water, and a high-level water tank is adopted for supplying water.

Has the advantages that:

(1) the invention adopts a unique and advanced diffusion dialysis membrane separation technology to treat the electrolyte waste liquid which is obtained by recovering metals such as nickel, iron, aluminum and the like through evaporation and filtration treatment, and the electrolyte waste liquid can be regenerated to a copper electrolytic tank for recycling, thereby greatly saving the enterprise cost and improving the production efficiency.

(2) The recovery rate of the treated electrolyte acid is more than or equal to 80 percent, the content of organic matters and metal impurity ions is lower than the specified lower limit value of the electrolytic copper solution, the condition of electrolytic copper is met, and the electrolyte acid can be recycled.

(3) The regenerated electrolyte meets the recycling requirement and simultaneously realizes zero discharge of three wastes, thereby fundamentally solving the problem of environmental pollution.

Drawings

FIG. 1 is a schematic flow chart of the present invention;

FIG. 2 is a schematic diagram of the principle of diffusion dialysis in the present invention.

Reference numerals: none.

Detailed Description

Reference will now be made in detail to the various embodiments of the invention, examples of which are illustrated in the accompanying drawings and described below. While the invention is described in conjunction with the exemplary embodiments, it will be understood that they are not intended to limit the invention to these exemplary embodiments. On the contrary, the invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.

The invention provides a diffusion dialysis membrane separation system suitable for recycling electrolytic copper waste liquid.

The waste liquid acidity adjusting device comprises an adjusting tank for adjusting the acid concentration of the electrolytic copper waste liquid to be not more than 500g/L, and the acidity of the electrolyte waste liquid is adjusted to meet the condition of diffusion dialysis.

The membrane separation device comprises a basic structural unit; the basic structural unit is separated by an anionic membrane to form a dialysis chamber and a diffusion chamber; the membrane separation device adopts countercurrent operation, and waste acid solution and receiving solution are respectively introduced into two sides of the anion homogeneous membrane; the concentration of the waste acid liquid side is far higher than that of the receiving liquid side; one end of the diffusion chamber of the membrane separation device for recovering acid is connected with the electrolytic copper tank and is used for receiving the regenerated acid solution; one end of the residual liquid separated by the dialysis chamber of the membrane separation device is connected with a waste liquid pool and is used for recycling the metal ion residual liquid.

Further, in the embodiment, the anion membrane is an acid-resistant anion homogeneous exchange membrane, so that the dialysis effect is remarkable, and the service life is long.

Further, in the embodiment, tap water is used as the receiving liquid, and a high-level water tank is used for supplying water, so that the operation is convenient, and the device is safe and energy-saving.

Specifically, the concentration of impurity ions such as nickel and iron in the electrolytic copper workshop is higher and higher along with the time, which greatly affects the electrolytic copper production, so that the electrolyte must be regenerated every 50-60 days. The waste liquid stock solution is subjected to decoppering, evaporation and filtration, so that copper ions, nickel ions, iron ions and the like are recovered and utilized; meanwhile, waste electrolyte reduction treatment is completed; the waste electrolyte after the reduction treatment is subjected to acidity adjustment back treatment, and the acid concentration is adjusted back to be within 500g/L, so that the working condition of the diffusion dialysis membrane is met; the membrane separation device is composed of a plurality of basic structural units; the basic structural units are separated by a homogeneous membrane resistant to acid anions to form a dialysis chamber and a diffusion chamber; the membrane separation device adopts countercurrent operation, waste acid liquid and receiving liquid are respectively introduced into two sides of the anion homogeneous membrane, and the receiving liquid is tap water high-level water supply; the concentration of the waste acid liquid side is much higher than that of the receiving liquid side to improve the expansionThe recovery effect of the dispersion dialysis; one end of the diffusion chamber of the membrane separation device for recovering acid is connected with the electrolytic copper tank and is used for receiving the regenerated acid solution; the concentration of acid and salt thereof on the waste acid liquid side is far higher than that on the water side; according to the principle of diffusion dialysis, due to the existence of concentration gradient, waste acid and salts thereof tend to permeate into a diffusion chamber, but a membrane has selective permeability to anions, so under the action of concentration difference, the anions on the waste acid side are attracted and smoothly permeate through a membrane pore passage to enter one side of water; at the same time, cations are entrained according to the requirement of electric neutrality, because of H⁺The hydration radius of the composite is smaller, and the charge is less; the metal salt has larger hydration radius and more charge, so H⁺The electrolyte solution passes through the membrane preferentially, so that acid in the waste liquid is separated to a regeneration acid tank, thereby realizing the recycling and regeneration of the electrolyte solution waste liquid, and the separated metal ion waste liquid is sent to a waste liquid tank for continuous recycling treatment.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.