阅读说明：本技术 一种糖和无机盐的分离系统及方法 (Separation system and method for sugar and inorganic salt ) 是由 许云鹏 陈明清 於锦锋 吴培福 刘斌 于 2020-12-18 设计创作，主要内容包括：本发明公开了一种糖和无机盐的分离系统,包括用于将糖和无机盐进行分离的连续离子分离系统、用于收集连续离子分离系统产生的无机盐溶液的储存罐、用于收集连续离子分离系统产生的糖液的糖液罐以及用于将无机盐溶液进行浓缩分离的膜分离系统。膜分离系统的进液端通过输料管与储存罐相连,输料管上设有输料泵。本发明还公开了一种糖和无机盐的分离方法,采用上述分离系统进行分离。本发明采用连续离子分离系统将糖和无机盐进行分离,并通过膜分离系统将分离出的无机盐溶液进行浓缩后再利用,有效节省了水的用量,减少了废水的排放,在实现提取工艺节能、减排、自动化生产的目的同时,缩短生产工艺周期,提高生产效率,减少产品的生产成本。(The invention discloses a sugar and inorganic salt separation system, which comprises a continuous ion separation system for separating sugar and inorganic salt, a storage tank for collecting inorganic salt solution generated by the continuous ion separation system, a sugar solution tank for collecting sugar solution generated by the continuous ion separation system, and a membrane separation system for concentrating and separating the inorganic salt solution. The liquid inlet end of the membrane separation system is connected with the storage tank through a material conveying pipe, and a material conveying pump is arranged on the material conveying pipe. The invention also discloses a separation method of sugar and inorganic salt, and the separation system is adopted for separation. The invention adopts the continuous ion separation system to separate sugar and inorganic salt, and the separated inorganic salt solution is concentrated and reused by the membrane separation system, thereby effectively saving the water consumption, reducing the discharge of waste water, shortening the production process period, improving the production efficiency and reducing the production cost of products while realizing the purposes of energy saving, emission reduction and automatic production of the extraction process.)

1. A separation system for sugars and inorganic salts, characterized in that: including the continuous ion separation system that is used for carrying out the separation with sugar and inorganic salt, be used for collecting the holding vessel of the inorganic salt solution that continuous ion separation system produced, be used for collecting the sugar liquid jar of the sugar liquid that continuous ion separation system produced and be used for carrying out the membrane separation system that the concentration was separated with inorganic salt solution, membrane separation system's feed liquor end pass through the conveying pipeline with the holding vessel links to each other, the conveying pipeline on be equipped with the conveying pump.

2. A separation system of sugars and inorganic salts according to claim 1, characterized in that: the membrane adopted by the membrane separation system is a reverse osmosis membrane.

3. A separation system of sugars and inorganic salts according to claim 1, characterized in that: the continuous ion separation system comprises at least 2 resin columns which are uniformly distributed along the circumferential direction, and resin filler for adsorbing inorganic salt is filled in each resin column.

4. A separation system of sugars and inorganic salts according to claim 3, characterized in that: the resin filler is K⁺Type chromatography resin packing.

5. A separation system of sugars and inorganic salts according to claim 3, characterized in that: continuous ion separation system include 24 resin columns, continuous ion separation system include first piece of separation system and second piece of separation system, first piece of separation system and second piece of separation system all include 12 resin columns, first piece of separation system and second piece of separation system equally divide into 3 regions, every regional component is as follows:

an adsorption zone: the sugar solution adsorption device comprises 4 resin columns, wherein the 4 resin columns are divided into a first adsorption area and a second adsorption area which are connected in series, the first adsorption area and the second adsorption area respectively comprise 2 resin columns which are connected in parallel, the liquid inlet end at the top of the first adsorption area is connected with a feeding pipe, and the liquid outlet end at the bottom of the second adsorption area is connected to a sugar solution tank through a pipeline;

a sugar washing area: the device comprises 4 resin columns, wherein the 4 resin columns are divided into a first sugar washing area and a second sugar washing area which are connected in series, the first sugar washing area and the second sugar washing area respectively comprise 2 resin columns which are connected in parallel, the liquid inlet end at the top of the first sugar washing area is connected with the outlet of a liquid suction pump through a pipeline, the inlet of the liquid suction pump is connected with a storage tank through a pipeline, and the liquid outlet end at the bottom of the second sugar washing area is connected with a feeding pipe through a pipeline;

inorganic salt washing zone: comprises 4 resin columns which are connected in series in sequence, the liquid inlet end of the inorganic salt cleaning area is connected with a pure water pipe, and the liquid outlet end is connected to a storage tank through a pipeline.

6. A separation system of sugars and inorganic salts according to claim 5, characterized by: the adsorption area, the sugar washing area and the inorganic salt washing area are sequentially arranged along the circumferential direction.

7. A method for separating sugar and inorganic salt, which comprises the steps of using the sugar and inorganic salt separation system according to any one of claims 1 to 6 to perform separation:

s1, pumping the mixed solution of sugar and inorganic salt in the raw material tank into a continuous ion separation system, adsorbing the inorganic salt in the mixed solution by a resin column in the continuous ion separation system to obtain sugar solution, and collecting the sugar solution into a sugar solution tank;

s2, washing the resin column which has absorbed the inorganic salt in the step S1 with inorganic salt water solution to remove residual sugar in the resin column, and returning the removed sugar liquid to the raw material tank;

s3, washing out the inorganic salt in the resin column after sugar washing in the step S2 by using pure water and collecting the inorganic salt in a storage tank;

and S4, pumping the inorganic salt solution in the storage tank into a membrane separation system for concentration treatment to obtain pure water and an inorganic acid concentrated solution, and reusing the pure water and the inorganic acid concentrated solution in a continuous ion separation system.

8. A process according to claim 7 for the separation of sugars and inorganic salts, characterized in that: in the step S1, the refractive index of the mixed solution is 5-20 Brix, and the conductivity is 15-60 ms/cm.

Technical Field

The invention belongs to the technical field of separation, and particularly relates to a separation system and a separation method for sugar and inorganic salt.

Background

In the prior art, the solution containing sugar and inorganic salt is difficult to directly separate sugar and inorganic salt, and the separation of sugar and inorganic salt is usually realized in a mode of combining a plurality of processes such as neutralization, membrane separation and the like, which invisibly increases the production cost and wastes resources. The existing separation process of sugar and inorganic salt generally adopts cation-anion resin to carry out sectional separation on cations and anions in sugar liquid, and the regeneration of the ion exchange resin consumes a large amount of water and simultaneously generates acid and alkali wastewater, thereby causing water resource waste and bringing environmental pressure.

Disclosure of Invention

In view of the above problems, an object of the present invention is to provide a system and a method for separating sugar and inorganic salts, wherein a continuous ion separation system is used to separate sugar and inorganic salts, and a membrane separation system is used to concentrate and recycle the generated inorganic salt solution, so as to reduce the water consumption and reduce the discharge of wastewater.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a separation system for sugar and inorganic salt comprises a continuous ion separation system for separating sugar and inorganic salt, a storage tank for collecting inorganic salt solution generated by the continuous ion separation system, a sugar solution tank for collecting sugar solution generated by the continuous ion separation system, and a membrane separation system for concentrating and separating the inorganic salt solution. The liquid inlet end of the membrane separation system is connected with the storage tank through a material conveying pipe, and a material conveying pump is arranged on the material conveying pipe.

Preferably, the membrane adopted by the membrane separation system is a reverse osmosis membrane. Pure water components and inorganic matter components can be obtained by adopting reverse osmosis membrane separation, and if nanofiltration or ultrafiltration is adopted, the condition of incomplete separation can occur, so that impurities are carried in the separated water, and the recycling is influenced.

Further, the continuous ion separation system comprises at least 2 resin columns which are uniformly distributed along the circumferential direction, and the interior of each resin column is filled with resin filler for adsorbing inorganic salt.

Preferably, the resin filler is K⁺Type chromatography resin packing.

Further, the continuous ion separation system comprises 24 resin columns. The continuous ion separation system comprises a first separation system and a second separation system, and the first separation system and the second separation system respectively comprise 12 resin columns. The first separation system and the second separation system are divided into 3 regions, and each region comprises the following components:

an adsorption zone: contain 4 resin columns, 4 resin columns divide into series connection's first adsorption zone and second adsorption zone, and first adsorption zone and second adsorption zone are respectively including 2 resin columns of mutual parallel connection, and the inlet pipe is connected to the top feed liquor end in first adsorption zone, and the bottom of second adsorption zone goes out the liquid end and passes through pipe connection to sugar liquid jar.

A sugar washing area: contain 4 resin columns, 4 resin columns divide into first sugar washing district and second sugar washing district of series connection, and first sugar washing district and second sugar washing district are respectively including 2 resin columns of mutual parallel connection. The top liquid inlet end of the first sugar washing area is connected with the outlet of the liquid pumping pump through a pipeline, the inlet of the liquid pumping pump is connected with the storage tank through a pipeline, and the bottom liquid outlet end of the second sugar washing area is connected with the feeding pipe through a pipeline.

Inorganic salt washing zone: comprises 4 resin columns which are connected in series in sequence, the liquid inlet end of the inorganic salt cleaning area is connected with a pure water pipe, and the liquid outlet end is connected to a storage tank through a pipeline.

Wherein, the adsorption area, the sugar washing area and the inorganic salt washing area are arranged in sequence along the circumferential direction.

The invention also discloses a separation method of sugar and inorganic salt, which adopts the separation system of sugar and inorganic salt to separate and comprises the following steps:

and S1, pumping the mixed solution of sugar and inorganic salt in the raw material tank into a continuous ion separation system, adsorbing the inorganic salt in the mixed solution by a resin column in the continuous ion separation system to obtain sugar solution, and collecting the sugar solution into a sugar solution tank.

And S2, washing the resin column which has absorbed the inorganic salt in the step S1 with inorganic salt water solution to remove residual sugar in the resin column, and returning the removed sugar liquid to the raw material tank.

S3, washing out the inorganic salt in the resin column after sugar washing in the step S2 by using pure water and collecting the inorganic salt in a storage tank.

And S4, pumping the inorganic salt solution in the storage tank into a membrane separation system for concentration treatment to obtain pure water and an inorganic acid concentrated solution, and reusing the pure water and the inorganic acid concentrated solution in a continuous ion separation system.

In the step S1, the refractive index of the mixed solution is 5-20 Brix, and the conductivity is 15-60 ms/cm.

The invention has the following beneficial effects: 1. breaking through the neutralization-extraction process in the traditional sugar making process, not only separating two substances by a physical method, but also recycling resources after retreating the by-products, recycling effective resources and being more economic and environment-friendly; 2. the use of water can be effectively saved, and the discharge of waste water is reduced; 3. the equipment investment is reduced, and the occupied area is reduced; 4. the production process period is shortened, the time is saved, and the production efficiency is improved.

Drawings

FIG. 1 is a schematic view of a sugar and inorganic salt separation system according to the present invention.

Fig. 2 is a schematic diagram of a continuous ion separation system.

Description of the main component symbols: 1. a continuous ion separation system; 101. a first separation system; 102. a second separation system; 11. a feed pipe; 12. a liquid pump; 13. a pure water pipe; 2. a storage tank; 3. a sugar solution tank; 4. a membrane separation system; 40. a reverse osmosis membrane; 5. a delivery pipe; 6. a material delivery pump.

Detailed Description

The invention is further described with reference to the following drawings and detailed description.

As shown in fig. 1, a separation system for sugar and inorganic salt comprises a continuous ion separation system 1 for separating sugar and inorganic salt, a storage tank 2 for collecting inorganic salt solution generated by the continuous ion separation system 1, a sugar solution tank 3 for collecting sugar solution generated by the continuous ion separation system 1, and a membrane separation system 4 for concentrating and separating inorganic salt solution. The liquid inlet end of the membrane separation system 4 is connected with the storage tank 2 through a material conveying pipe 5, and a material conveying pump 6 is arranged on the material conveying pipe 5.

Preferably, the membrane employed in the membrane separation system 4 is a reverse osmosis membrane 40. Pure water components and inorganic matter components can be obtained by adopting the reverse osmosis membrane 40 for separation, and if nanofiltration or ultrafiltration is adopted, incomplete separation can occur, so that impurities are carried in the separated water, and the recycling is influenced.

As shown in FIG. 2, the continuous ion separation system 1 comprises 24 resin columns uniformly arranged on a circular turntable along the circumferential direction, and K for adsorbing inorganic salts is filled in each resin column⁺The position of the resin column is switched once after the turntable is stepped once, and the resin column is switched leftwards one by one in the embodiment. The continuous ion separation system 1 includes a first separation system 101 and a second separation system 102, the first separation system 101 includes 12 resin columns (1-12#), the first separation system 101 is divided into 3 regions, each region is composed as follows:

an adsorption zone: contain 4 resin columns (9-12#), 4 resin columns divide into the first adsorption zone (9#, 10#) and the second adsorption zone (11#, 12#) of series connection, and inlet pipe 11 is connected to the top inlet port of 9# resin column and 10# resin column, and 11# resin column and 12# resin column's bottom play liquid end pass through pipe connection to sugar liquid jar 3.

A sugar washing area: contain 4 resin columns (5-8#), 4 resin columns divide into the first sugar washing district (5#, 6#) and the second sugar washing district (7#, 8#) of series connection, and the top feed liquor end of 5# resin column and 6# resin column passes through the pipeline and links to each other with the export of drawing liquid pump 12, and the import of drawing liquid pump 12 passes through the pipeline and links to each other with holding vessel 2, and the bottom of 7# resin column and 8# resin column is gone out the liquid end and is passed through the pipeline and link to each other with inlet pipe 11.

Inorganic salt washing zone: comprises 4 resin columns (1-4#) connected in series in sequence, wherein the liquid inlet end of the 1# resin column is connected with a pure water pipe 13, and the liquid outlet end of the 4# resin column is connected to a storage tank 2 through a pipeline.

The second separation systems 102 each include 12 resin columns (13-24#), and the second separation system 102 is divided into 3 zones, each zone consisting of:

an adsorption zone: the sugar solution machine comprises 4 resin columns (21-24#), wherein the 4 resin columns are divided into a first adsorption area (21#, 22#) and a second adsorption area (23#, 24#) which are connected in series, the liquid inlet ends at the tops of the 21# resin columns and the 22# resin columns are connected with a feeding pipe 11, and the liquid outlet ends at the bottoms of the 23# resin columns and the 24# resin columns are connected to a sugar solution tank 3 through pipelines.

A sugar washing area: contain 4 resin columns (17-20#), 4 resin columns divide into the first sugar washing district (17#, 18#) and the second sugar washing district (19#, 20#) of series connection, and the top inlet end of 17# resin column and 18# resin column passes through the pipeline and links to each other with the export of drawing liquid pump 12, and the import of drawing liquid pump 12 passes through the pipeline and links to each other with holding vessel 2, and the bottom of 19# resin column and 20# resin column is gone out the liquid end and is linked to each other with inlet pipe 11 through the pipeline.

Inorganic salt washing zone: comprises 4 resin columns (13-16#) connected in series in sequence, wherein the liquid inlet end of the 13# resin column is connected with a pure water pipe 13, and the liquid outlet end of the 16# resin column is connected to a storage tank 2 through a pipeline.

The invention also provides a separation method of sugar and inorganic salt, which adopts the separation system of sugar and inorganic salt to separate and comprises the following steps:

firstly, pumping a mixed solution of sugar and inorganic salt in a raw material tank into a continuous ion separation system 1, adsorbing the inorganic salt in the mixed solution by a resin column in the continuous ion separation system 1 to obtain sugar liquor, and collecting the sugar liquor into a sugar liquor tank 3.

And secondly, washing the resin column which has absorbed the inorganic salt with inorganic salt water solution, washing out residual sugar in the resin column, and returning the washed sugar liquid to the raw material tank.

And thirdly, washing out the inorganic salt in the resin column after sugar washing by using pure water and collecting the inorganic salt in the storage tank 2.

And fourthly, pumping the inorganic salt solution in the storage tank 2 into the membrane separation system 2 for concentration treatment to obtain pure water and inorganic acid concentrated solution which are reused in the continuous ion separation system 1.

Repeating the above steps to continuously separate the sugar salt from the feed solution.

The feed to the continuous ion separation system 1 of the present invention is a sugar solution (which may be a polysaccharide or monosaccharide) containing sugars, inorganic salts, organic acids, inorganic acids, pigments, and the like. The sugar content is represented by a refractive index of 5-20 Brix, and the inorganic matter is characterized by an electric conductivity of 15.0-60 ms/cm. After separation is carried out by the continuous ion separation system 1, the refractive index of the obtained sugar solution is 5-20 Brix, and the conductivity of the obtained inorganic salt mixed solution is 8-40 ms/cm. And pumping the inorganic substance mixed solution into the membrane separation system 2 for concentration and separation, so that 20-80% of water can be recovered for returning to production, and the inorganic substance in the concentrated solution can continue to return to production for use because the inorganic substance also contains a large amount of inorganic acid. According to the invention, the continuous ion separation system 1 and the membrane separation system 2 are organically combined and fully complemented, and acid-base neutralization, separation and concentration in the traditional process are broken through, so that the sugar making process is more environment-friendly and more economic.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.