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A salt-adding electrodialysis device

A kind of electrodialysis technology, applied in the direction of electrodialysis, dispersed particle separation, separation methods, etc., can solve the problems affecting the long-term stable operation of electrodialysis units, inorganic salt scaling, etc., and achieve the effect of low noise and high recovery rate

Active Publication Date: 2017-11-24
华电水务工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in these applications, a lot of anions and cations will be enriched in the concentrated water chamber, which will easily form insoluble inorganic salts and cause scaling, which will affect the long-term stable operation of the electrodialysis device.

Method used

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  • A salt-adding electrodialysis device

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Embodiments of the present invention: as figure 1 As shown, a salt-adding electrodialysis device includes a cathode 1, a membrane unit 2 and an anode 3. The cathode 1, the membrane units 2 and anodes 3 stacked in parallel are arranged and fixed together in sequence, and the bottom of the membrane unit 2 is provided with Raw water inlet pipeline 4 and sodium chloride inlet pipeline 5, the top of membrane unit 2 is provided with fresh water outlet pipeline 6, sodium chloride solution recovery pipeline 7, first concentrated water pipeline 8 and second concentrated water pipeline 9 , the first concentrated water pipeline 8 and the second concentrated water pipeline 9 are both connected to the waste liquid reprocessing recovery device 17 .

[0018] Described membrane unit 2 comprises 3 cation exchange membranes 10, 2 anion exchange membranes 11 and 5...

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Abstract

The invention discloses a salting electrodialysis device comprising a cathode (1), a film unit (2) and an anode (3). The cathode (1) is arranged and fixed with the film unit (2) and the anode (3) which are stacked in parallel connection, a raw water inlet pipe (4) and a sodium chloride liquid inlet pipe (5) are arranged at the bottom of the film unit (2), the top of the film unit (2) is provided with a fresh water outlet pipe (6), a sodium chloride liquid recovery pipe (7), a first concentrated water pipe (8) and a second concentrated water pipe (9), and the first concentrated water pipe (8) and the second concentrated water pipe (9) are connected with a waste liquid retreatment and recovery device (17). The salting electrodialysis device has the advantages of low noise, high recovery rate and no scaling.

Description

technical field [0001] The invention relates to an electrodialysis device, in particular to a salt-adding electrodialysis device. Background technique [0002] Electrodialysis is an ion separation technology that combines a DC electric field with an ion-selective permeable membrane. Under the action of an electric field, charged ions pass through the selective permeable membrane after the charged ions and anions in the fresh water chamber pass through the selective permeable membrane, leaving a salt content. The effluent water is lower than the influent water, while the concentrated water chamber enriches the ions from the adjacent fresh water chamber to form effluent water with a higher salt content than the influent water, thus realizing the desalination, concentration, refining or purification of the solution. [0003] The electrodialysis device has a wide range of applications, including water desalination and desalination, seawater concentration and salt production, ref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D61/46C02F1/469
Inventor 秦树篷李宏秀闫彩霞潘旗
Owner 华电水务工程有限公司