A device for recovering potassium ions in corn steep liquor

Abstract

The utility model discloses a kind of recovery devices of potassium ions in corn soaking water, it is related to corn soaking water production technical field, the inlet of sedimentation tank is connected with corn soaking water tank, the liquid phase outlet of sedimentation tank is connected with anion exchange resin column, the outlet of anion exchange resin column is connected with reaction tank, the inlet of reaction tank is connected with tartaric acid tank, the outlet of reaction tank is connected with first filter, and the solid phase outlet of first filter is connected with potassium hydrogen tartrate crude product tank.Sedimentation tank makes corn soaking water preliminary settlement, to reduce burden for subsequent processing, improve the stability and efficiency of overall recovery process.Potassium ions in the liquid after treatment and tartaric acid react, realize that potassium ions is precipitated from solution in solid form, reach the purpose of recovering potassium ions.First filter can generate potassium hydrogen tartrate of reaction preliminary filtration collection, obtain crude product, convenient for subsequent further purification processing.

Description

Technical Field

[0001] This utility model relates to the field of corn soaking water production technology, specifically to a device for recovering potassium ions from corn soaking water. Background Technology

[0002] Corn soaking water is a byproduct of the wet process of corn starch production and is rich in potassium. Analysis shows that per cubic meter of water... 3 The water used to soak corn contains 5.5 kg of potassium. As the world's largest producer of corn starch, my country produces approximately 35 million tons of corn soaking water annually, equivalent to 192,500 tons of potassium. Fully utilizing the potassium resources in this water could significantly alleviate my country's potassium shortage, generating substantial economic and social benefits.

[0003] Currently, the recovery of potassium from corn soaking water mainly uses the cation exchange method. This involves using cation exchange resin to adsorb potassium ions from the corn soaking water, followed by acid desorption to obtain an acidic solution containing potassium ions. The potassium product is then obtained through separation, concentration, and crystallization. However, the current process suffers from drawbacks such as high equipment investment, long processing time, and high production costs, limiting the recovery and utilization of potassium from corn soaking water. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a potassium ion recovery device for corn soaking water, which is simple in structure, low in cost, and has a high potassium recovery rate, in order to address the shortcomings of the existing technology.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A device for recovering potassium ions from corn soaking water includes a settling tank, the inlet of which is connected to a corn soaking water tank via a pipe, the liquid phase outlet of which is connected to an anion exchange resin column via a pipe, the outlet of which is connected to a reaction tank via a pipe, the inlet of which is connected to a tartaric acid tank via a pipe, the outlet of which is connected to a first filter via a pipe, and the solid phase outlet of which is connected to a crude potassium hydrogen tartrate tank.

[0007] As an improved technical solution, the solid phase outlet of the settling tank is connected to a first corn starch recovery tank.

[0008] As an improved technical solution, the liquid phase outlet of the first filter is connected to a second corn yellow powder recovery tank via a pipeline.

[0009] As an improved technical solution, the inlet of the anion exchange resin column is connected to a desorbent tank via a pipeline, the outlet of the anion exchange resin column is connected to a concentration tank via a pipeline, and the outlet of the concentration tank is connected to a concentrate tank.

[0010] As an improved technical solution, the outlet of the crude potassium hydrogen tartrate tank is connected to an acidification tank, the inlet of the acidification tank is connected to a dilute hydrochloric acid tank via a pipeline, the outlet of the acidification tank is connected to a second filter via a pipeline, the liquid phase outlet of the second filter is connected to a neutralization tank via a pipeline, the inlet of the neutralization tank is connected to an alkali tank via a pipeline, the outlet of the neutralization tank is connected to a centrifuge, and the solid phase outlet of the centrifuge is connected to the finished potassium hydrogen tartrate tank via a dryer.

[0011] As an improved technical solution, the solid phase outlet of the second filter is connected to a denatured protein tank.

[0012] As a preferred technical solution, the liquid phase outlet of the centrifuge is connected to a mother liquor tank.

[0013] As a preferred technical solution, the outlet of the acidification tank is connected to a decolorization tank via a pipeline, the inlet of the decolorization tank is connected to an activated carbon tank, and the outlet of the decolorization tank is connected to the neutralization tank via a pipeline.

[0014] As a preferred technical solution, the outlet of the mother liquor tank is connected to the desiccant tank via a pipeline.

[0015] Due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0016] This invention relates to a potassium ion recovery device for corn soaking water, comprising a settling tank. The inlet of the settling tank is connected to a corn soaking water tank via a pipe. The liquid phase outlet of the settling tank is connected to an anion exchange resin column via a pipe. The outlet of the anion exchange resin column is connected to a reaction tank via a pipe. The inlet of the reaction tank is connected to a tartaric acid tank via a pipe. The outlet of the reaction tank is connected to a first filter via a pipe. The solid phase outlet of the first filter is connected to a crude potassium hydrogen tartrate tank. The connection between the settling tank inlet and the corn soaking water tank allows for initial settling of the corn soaking water, separating larger particulate impurities, reducing the burden on subsequent processing, and improving the stability and efficiency of the overall recovery process. Utilizing the adsorption characteristics of resin for specific anions, phytic acid in the deionized liquid is adsorbed, increasing the purity of potassium ions. The potassium ions in the treated liquid react with tartaric acid to generate potassium hydrogen tartrate, achieving the precipitation of potassium ions from the solution in solid form, thus realizing the recovery of potassium ions. The first filter can initially filter and collect the potassium hydrogen tartrate generated in the reaction to obtain a crude product, which is convenient for further purification and processing. This utility model has a simple structure, low cost, and high potassium recovery rate.

[0017] The solid phase outlet of the settling tank of this invention is connected to a first corn starch recovery tank, which increases the added value of the product and reduces waste emissions.

[0018] The liquid phase outlet of the first filter is connected to a second corn starch recovery tank via a pipeline, which further recovers residual corn starch from the liquid phase, improves the recovery rate of corn starch, and fully taps the resource value.

[0019] The inlet of the anion exchange resin column is connected to a desorption tank via a pipeline, and the outlet of the anion exchange resin column is connected to a concentration tank via a pipeline. The outlet of the concentration tank is connected to a concentrate tank. The anion exchange resin column can be desorbed to elute the adsorbed phytic acid. The outlet is connected to the concentration tank and the concentrate tank, allowing for the concentration of the eluent. The concentrated eluent can be sold directly or hydrolyzed to produce inositol and byproducts, thus improving its economic value.

[0020] The outlet of the crude potassium hydrogen tartrate tank is connected to an acidification tank. The inlet of the acidification tank is connected to a dilute hydrochloric acid tank via a pipeline. The outlet of the acidification tank is connected to a second filter via a pipeline. The liquid phase outlet of the second filter is connected to a neutralization tank via a pipeline. The inlet of the neutralization tank is connected to an alkali tank via a pipeline. The outlet of the neutralization tank is connected to a centrifuge. The solid phase outlet of the centrifuge is connected to the finished potassium hydrogen tartrate tank via a dryer. Through a series of operations including acidification, filtration, neutralization, centrifugation, and drying, the crude potassium hydrogen tartrate can be purified to obtain a high-purity finished potassium hydrogen tartrate product, improving product quality and market competitiveness.

[0021] The solid phase outlet of the second filter is connected to a denatured protein tank to collect the denatured proteins generated during the acidification process, thereby realizing the recycling of useful components in the waste, reducing environmental pollution, and increasing potential economic benefits.

[0022] The centrifuge's liquid outlet is connected to a mother liquor tank to avoid wasting useful components remaining in the mother liquor and to facilitate subsequent processing and reuse of the mother liquor.

[0023] The outlet of the acidification tank is connected to a decolorization tank via a pipeline, the inlet of the decolorization tank is connected to an activated carbon tank, and the outlet of the decolorization tank is connected to the neutralization tank via a pipeline.

[0024] The outlet of the mother liquor tank is connected to the desorbent tank via a pipeline, which allows some components of the mother liquor to be used as a supplement or raw material for the desorbent, thereby achieving resource recycling, reducing production costs, and improving the sustainability of the entire recycling process. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0027] The components include: 1. Settling tank; 2. Corn soaking water tank; 3. Anion exchange resin column; 4. Reaction tank; 5. Tartaric acid tank; 6. First filter; 7. Potassium hydrogen tartrate crude product tank; 8. First corn yellow powder recovery tank; 9. Second corn yellow powder recovery tank; 10. Eluent tank; 11. Concentrator tank; 12. Concentrate tank; 13. Acidification tank; 14. Dilute hydrochloric acid tank; 15. Second filter; 16. Neutralization tank; 17. Alkali tank; 18. Centrifuge; 19. Dryer; 20. Potassium hydrogen tartrate finished product tank; 21. Denatured protein tank; 22. Mother liquor tank; 23. Decolorization tank; 24. Activated carbon tank. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] like Figure 1 As shown, a device for recovering potassium ions from corn soaking water includes a settling tank 1. The inlet of the settling tank 1 is connected to a corn soaking water tank 2 via a pipe. The liquid phase outlet of the settling tank 1 is connected to an anion exchange resin column 3 via a pipe. The outlet of the anion exchange resin column 3 is connected to a reaction tank 4 via a pipe. The inlet of the reaction tank 4 is connected to a tartaric acid tank 5 via a pipe. The outlet of the reaction tank 4 is connected to a first filter 6 via a pipe. The solid phase outlet of the first filter 6 is connected to a crude potassium hydrogen tartrate tank 7. The connection between the inlet of the settling tank 1 and the corn soaking water tank 2 allows for initial settling of the corn soaking water, separating larger particulate impurities, reducing the burden on subsequent processing, and improving the stability and efficiency of the overall recovery process. Utilizing the adsorption characteristics of resin for specific anions, phytic acid in the deionized liquid is adsorbed, increasing the purity of potassium ions. The potassium ions in the treated liquid react with tartaric acid to generate potassium hydrogen tartrate, achieving the precipitation of potassium ions from the solution in solid form, thus realizing the purpose of potassium ion recovery. The first filter 6 can initially filter and collect the potassium hydrogen tartrate generated in the reaction to obtain a crude product, which is convenient for further purification and processing. The present invention has a simple structure, low cost, and high potassium recovery rate.

[0030] The solid phase outlet of settling tank 1 is connected to the first corn starch recovery tank 8, which increases the added value of the product and reduces waste emissions.

[0031] The liquid phase outlet of the first filter 6 is connected to the second corn starch recovery tank 9 via a pipeline, which further recovers the residual corn starch from the liquid phase, improves the recovery rate of corn starch, and fully taps the resource value.

[0032] The inlet of the anion exchange resin column 3 is connected to a desorption tank 10 via a pipe, and the outlet of the anion exchange resin column 3 is connected to a concentration tank 11 via a pipe. The outlet of the concentration tank 11 is connected to a concentrate tank 12. The anion exchange resin column 3 can be desorbed to elute the adsorbed phytic acid. The outlet is connected to the concentration tank 11 and the concentrate tank 12, allowing for the concentration of the eluent. The concentrated eluent can be sold directly or hydrolyzed to produce inositol and byproducts, thus improving its economic value.

[0033] The outlet of the crude potassium hydrogen tartrate tank 7 is connected to an acidification tank 13. The inlet of the acidification tank 13 is connected to a dilute hydrochloric acid tank 14 via a pipeline. The outlet of the acidification tank 13 is connected to a second filter 15 via a pipeline. The liquid phase outlet of the second filter 15 is connected to a neutralization tank 16 via a pipeline. The inlet of the neutralization tank 16 is connected to an alkali tank 17 via a pipeline. The outlet of the neutralization tank 16 is connected to a centrifuge 18. The solid phase outlet of the centrifuge 18 is connected to the finished potassium hydrogen tartrate tank 20 via a dryer 19. Through a series of operations such as acidification, filtration, neutralization, centrifugation, and drying, the crude potassium hydrogen tartrate can be purified to obtain a high-purity finished potassium hydrogen tartrate product, thereby improving product quality and market competitiveness.

[0034] The solid phase outlet of the second filter 15 is connected to a denatured protein tank 21, which collects the denatured protein generated during the acidification process, thereby realizing the recycling of useful components in the waste, reducing environmental pollution, and increasing potential economic benefits.

[0035] The liquid outlet of the centrifuge 18 is connected to the mother liquor tank 22 to avoid wasting the useful components remaining in the mother liquor and to facilitate subsequent processing and reuse of the mother liquor.

[0036] The outlet of the acidification tank 13 is connected to the decolorization tank 23 via a pipeline, the inlet of the decolorization tank 23 is connected to the activated carbon tank 24, and the outlet of the decolorization tank 23 is connected to the neutralization tank 16 via a pipeline.

[0037] The outlet of the mother liquor tank 22 is connected to the desorbent tank 10 through a pipeline, which can use some components in the mother liquor as a supplement or raw material for the desorbent, thereby realizing resource recycling, reducing production costs, and improving the sustainability of the entire recycling process.

[0038] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

Claims

1. A device for recovering potassium ions from corn soaking water, characterized in that: The system includes a settling tank, the inlet of which is connected to a corn soaking water tank via a pipe, the liquid phase outlet of which is connected to an anion exchange resin column via a pipe, the outlet of which is connected to a reaction tank via a pipe, the inlet of which is connected to a tartaric acid tank via a pipe, the outlet of which is connected to a first filter via a pipe, and the solid phase outlet of which is connected to a crude potassium hydrogen tartrate tank.

2. The device for recovering potassium ions from corn soaking water as described in claim 1, characterized in that: The solid phase outlet of the settling tank is connected to a first corn starch recovery tank.

3. The device for recovering potassium ions from corn soaking water as described in claim 1, characterized in that: The liquid phase outlet of the first filter is connected to a second corn starch recovery tank via a pipeline.

4. The device for recovering potassium ions from corn soaking water as described in claim 1, characterized in that: The inlet of the anion exchange resin column is connected to a desorbent tank via a pipeline, the outlet of the anion exchange resin column is connected to a concentration tank via a pipeline, and the outlet of the concentration tank is connected to a concentrate tank.

5. The device for recovering potassium ions from corn soaking water as described in claim 4, characterized in that: The outlet of the crude potassium hydrogen tartrate tank is connected to an acidification tank. The inlet of the acidification tank is connected to a dilute hydrochloric acid tank via a pipeline. The outlet of the acidification tank is connected to a second filter via a pipeline. The liquid phase outlet of the second filter is connected to a neutralization tank via a pipeline. The inlet of the neutralization tank is connected to an alkali tank via a pipeline. The outlet of the neutralization tank is connected to a centrifuge. The solid phase outlet of the centrifuge is connected to the finished potassium hydrogen tartrate tank via a dryer.

6. The device for recovering potassium ions from corn soaking water as described in claim 5, characterized in that: The solid phase outlet of the second filter is connected to a denatured protein tank.

7. The device for recovering potassium ions from corn soaking water as described in claim 5, characterized in that: The centrifuge's liquid phase outlet is connected to a mother liquor tank.

8. The device for recovering potassium ions from corn soaking water as described in claim 5, characterized in that: The outlet of the acidification tank is connected to a decolorization tank via a pipeline, the inlet of the decolorization tank is connected to an activated carbon tank, and the outlet of the decolorization tank is connected to the neutralization tank via a pipeline.

9. The device for recovering potassium ions from corn soaking water as described in claim 7, characterized in that: The outlet of the mother liquor tank is connected to the desorbent tank via a pipeline.

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