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Electrodialysis purification system and purification method of solid phase system

A purification method and electrodialysis technology, applied in electrodialysis, chemical instruments and methods, membranes, etc., can solve problems such as no industrial application, achieve the effects of enhancing electrical conductivity, reducing corrosion rate, and prolonging the service life

Active Publication Date: 2021-04-13
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing technology only has a laboratory scale, and there is no industrial application

Method used

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  • Electrodialysis purification system and purification method of solid phase system
  • Electrodialysis purification system and purification method of solid phase system
  • Electrodialysis purification system and purification method of solid phase system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] see figure 1 , an electrodialysis purification system comprising: a material pre-dispersion device 1, a primary electrodialysis device 2, a buffer storage device 3, three secondary electrodialysis devices 4, a storage device 5, a centrifugal device 6, a drying device 7, a first A pole liquid circulation device 8 and a second pole liquid circulation device 9, the transportation and connection of the slurry are realized through pipelines between each device; the first-stage electrodialysis device 2 is externally connected with a first pole liquid circulation device 8; the two-stage electrodialysis device 2 The electrodialysis device 4 is externally connected with a second electrolyte circulation device 9 . The two-stage electrodialysis device can be multiple, and the multiple two-stage electrodialysis devices are externally connected to the same second electrolyte circulation device.

Embodiment 2

[0087] see figure 2 , the primary electrodialysis device includes a first casing 22, and the first anode chamber 213, the first anode membrane 25, the first material chamber 212, the first cathode membrane 27 and the first anode membrane are sequentially arranged in the first casing 22 The cathode chamber 211, the first anode chamber 213, the first material chamber 212 and the first cathode chamber 211 are formed by the interval between the first anode film 25 and the first cathode film 27, the first anode film 25, the first The surface of the negative side membrane 27 adjacent to the first material chamber 212 is provided with a dialysis membrane layer; the first anode membrane 25 is a monovalent and / or divalent anion exchange membrane; the first cathode membrane 27 is a valence and / or divalent cation exchange membrane; the first anolyte circulation inlet 21, the first anolyte circulation outlet 23 are connected with the first anolyte circulation device to realize the circul...

Embodiment 3

[0089]see image 3 , the secondary electrodialysis device includes a second housing 42, and the second housing 42 is sequentially provided with a second anode chamber 413, a second anode membrane 45, a second material chamber 412, a second cathode membrane 47 and a second The cathode chamber 411, the second anode chamber 413, the second material chamber 412 and the second cathode chamber 411 are formed by the interval between the second anode film 45 and the second cathode film 47, the second anode film 45, the second The surface of the cathode membrane 47 adjacent to the second material chamber 412 is provided with a dialysis membrane layer; the second anode membrane 45 is a monovalent anion exchange membrane; the second cathode membrane 47 is a monovalent cation exchange membrane. The second anolyte circulation inlet 41 and the second anolyte circulation outlet 43 are connected to the second anolyte circulation device to realize the circulation of the second anolyte. The sec...

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Abstract

The invention discloses an electrodialysis purification system and a purification method of a solid phase system. The purification method comprises the steps that the electrodialysis purification system is adopted, a solid phase system containing electrolyte is dispersed in water to form slurry, and then the obtained slurry is inputted into a first material chamber of the primary electrodialysis device to be subjected to primary electrodialysis treatment; and the slurry subjected to the first-stage electrodialysis treatment is inputted into a second material chamber of the secondary electrodialysis device for secondary electrodialysis treatment, and then centrifugation and drying treatment is performed to obtain purified solid powder, wherein the anolyte of the first anode chamber and the anolyte of the second anode chamber both comprise anolyte and imidazoline corrosion inhibitors, and the catholyte of the first cathode chamber and the catholyte of the second cathode chamber both comprise catholyte and scale and corrosion inhibitors. According to the electrodialysis purification system, the service cycles of the electrode, the anolyte and the catholyte are greatly prolonged, and the cost is greatly reduced; meanwhile, the purification process is simple, and the purification efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of electric-driven membrane separation, and in particular relates to an electrodialysis purification system and a purification method of a solid-phase system. Background technique [0002] High-purity powder is the basic material of modern industrial systems, such as advanced ceramic raw materials, zinc borate flame retardant for circuit boards, calcium carbonate filler for high-grade paper, lithium battery electrode raw materials, titanium dioxide zinc oxide pigments, cosmetic raw materials, etc. Some powders can be synthesized from high-purity raw materials, such as titanium dioxide, zinc oxide, etc., and such powders usually do not need further evolution. Zinc borate, calcium carbonate and other products are produced by solution precipitation or solid-liquid reaction, in which Cl - , SO 4 2 -, Na + , Mg 2+ It will be adsorbed in tiny powder particles, and separated by conventional cleaning and centri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D61/48B01D61/52
CPCB01D61/48B01D61/52B01D61/422B01D2311/25B01D2311/12B01D2311/2676B01D2311/26
Inventor 董明哲周德文聂国亮李军
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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