Bipolar membrane electrodialysis device and method for treating sodium sulfate wastewater by using same

A technology of bipolar membrane electrodialysis and electrodialysis, which is applied in electrodialysis, separation methods, water/sewage treatment, etc., can solve the problems of not realizing the maximization of economic value, and achieve convenient storage and application, and a large amount of wastewater treatment , high economic value

Active Publication Date: 2022-01-04
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although metathesis electrodialysis can convert two low economic value salts

Method used

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  • Bipolar membrane electrodialysis device and method for treating sodium sulfate wastewater by using same
  • Bipolar membrane electrodialysis device and method for treating sodium sulfate wastewater by using same
  • Bipolar membrane electrodialysis device and method for treating sodium sulfate wastewater by using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0150] Example 1 Bipolar membrane metathesis five-chamber electrodialysis device

[0151] Add respectively corresponding solutions in each water tank of the device, wherein: adding 2L concentration is the sodium sulfate solution of 0.1mol / L (usually 0.05-0.2mol / L) in the water tank of the pole chamber; 1% (usually 1-5%) HCl solution; add 1mol / L (usually 1-3mol / L) ammonium chloride solution to the ammonium chloride chamber water tank; add 1% mass concentration to the ammonium sulfate chamber water tank (usually 1-5%) ammonium sulfate solution; add 0.5mol / L (usually 0.5-1.5mol / L) sodium sulfate waste water in the sodium sulfate chamber water tank, add mass concentration in the alkali chamber water tank and be 1% (usually 1-5%) sodium hydroxide solution;

[0152] Then turn on the circulation pump corresponding to each water tank, that is, turn on the circulation pump arranged on the conduit connecting each water tank and the corresponding compartment in the membrane stack, adjus...

Embodiment 2

[0164] Except that the direct current power supply is turned on for electrodialysis, and the control voltage is constant at 12V during the metathesis reaction, the rest are the same as in Example 1, and the measurement results are shown in Table 1.

Embodiment 3

[0166] Except that the DC power supply is turned on for electrodialysis and the control voltage is constant at 15V during the metathesis reaction, the rest are the same as in Example 1, and the measurement results are shown in Table 1.

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Abstract

The invention belongs to the technical field of chemical environmental protection, and discloses a resource utilization method of high-salinity wastewater sodium sulfate, which adopts a bipolar membrane double decomposing multi-chamber electrodialysis method to treat high-salinity wastewater sodium sulfate, and realizes low-cost high-value resource utilization of high-salinity wastewater sodium sulfate zwitterions. The method provided by the invention overcomes the technical problems of low value and difficult resource utilization of the waste salt sodium sulfate, realizes continuous operation of the whole process, has stable product parameters, and meets the requirements of industrial production; and meanwhile, byproducts hydrochloric acid and sodium hydroxide are reused for factories, so that zero emission is realized.

Description

technical field [0001] The invention relates to the technical field of chemical environmental protection, and specifically relates to two kinds of bipolar membrane metathesis multi-chamber electrodialysis devices and a method for using the bipolar membrane metathesis multi-chamber electrodialysis devices to discharge sodium sulfate-type high-salt industrial wastewater towards zero. Background technique [0002] With the development of industry, the extensive use of sulfuric acid and sodium alkali in the chemical and metallurgical industry has caused a large amount of sodium sulfate-type high-salt industrial wastewater to be produced in the industrial production process, making it difficult to realize resource utilization. [0003] The traditional zero-discharge wastewater treatment method is to concentrate and crystallize the above wastewater to generate fresh water and crystallized salt. Chinese utility model patent CN211056871U discloses a device for electrodialysis and re...

Claims

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Application Information

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IPC IPC(8): B01D61/44B01D61/48B01D61/58C02F1/469C01B7/01C01C1/244C01D1/04
CPCB01D61/445B01D61/485B01D61/58C02F1/4693C01B7/01C01C1/244C01D1/04Y02A20/124
Inventor 田秉晖朱铭杨敏罗胜
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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