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Filter element, separation device and treatment equipment

A filter element and central location technology, applied in the field of water treatment, can solve the problems of electrode burning, desalination performance decline, water flow blockage, etc.

Pending Publication Date: 2021-09-17
广东栗子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In short, the electrode chamber makes the structural design of electrochemical deionization very complicated. Once the control is not good, it will cause serious problems such as desalination performance, water flow blockage, and electrode burnout.

Method used

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  • Filter element, separation device and treatment equipment
  • Filter element, separation device and treatment equipment
  • Filter element, separation device and treatment equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A roll-type bipolar membrane filter element, including at least one pair of electrode groups and a membrane structure wound by more than one bipolar membrane, the electrode group includes at least one porous electrode, and each bipolar membrane is made of The same cation exchange membrane and anion exchange membrane are formed, and there is no flow channel between the cation exchange membrane and the anion exchange membrane forming the same bipolar membrane.

[0061] A pair of electrode groups may be composed of two porous electrodes, or may be composed of a porous electrode and a common electrode. Common electrodes such as metal electrodes, titanium electrodes with ruthenium-yttrium coating, ruthenium-yttrium electrodes, carbon electrodes, graphite electrodes, etc.

[0062] Wherein, the porous electrode can be formed by porous material, or by lamination of porous material and current collector, or by sequential lamination of current collector, porous material and ion e...

Embodiment 2

[0086] A roll-type bipolar membrane filter element, other features are the same as in Embodiment 1, the difference is that in this embodiment: as Figure 4 , Figure 5 As shown, the porous electrode 100 is formed by stacking the current collector 130, the porous material 110, and the anion exchange membrane 120 sequentially, and the porous electrode 100 is an anion membrane electrode; Formed in layers, the porous electrode 200 is a positive membrane electrode. The porous electrode can be laminated and clamped by current collectors, porous materials, and ion-exchange membranes without the use of binders; or it can also be fixed by thermal lamination or bonded by binders.

[0087] The roll-type bipolar membrane filter element of the present embodiment, its desalination process is as follows Figure 4 As shown, during the desalination process of the roll-type bipolar membrane filter element, the cation exchange membrane of the bipolar membrane faces the positive electrode, and ...

Embodiment 3

[0096] A roll-type bipolar membrane filter element, other features are the same as those in Embodiment 1 or 2, except that the porous electrode is not provided with a collector, and is only formed by laminating porous materials and ion-exchange membranes. The electrical conductivity of the porous material in this embodiment meets the requirement of electrical conductivity, so no collector is required.

[0097] It should be noted that the specific structure of the two porous electrodes can be flexibly set according to needs, such as one porous electrode has a collector and the other porous electrode has no collector, or both porous electrodes have collectors at the same time, or both porous electrodes have collectors at the same time. The collector is not set, as long as the actual demand is met.

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Abstract

The invention discloses a roll type bipolar membrane filter element, an electrodeionization device with the filter element and water treatment equipment of the electrodeionization device. The filter element comprises at least one pair of electrode groups and a membrane structure formed by winding more than one bipolar membrane. The electrode assembly at least comprises a porous electrode, and each bipolar membrane is composed of a cation exchange membrane and an anion exchange membrane which are attached together. There is no flow channel between the cation exchange membrane and the anion exchange membrane which form the same bipolar membrane. The porous electrode and the bipolar membrane are adopted, and the bipolar membrane is wound into a roll type structure, so that the problems of gas generation and scaling caused by hydrolysis of water in an electrode chamber in the prior art can be avoided. The technical scheme can improve the desalination rate, and has the characteristics of high water production rate and less water resource waste.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a roll-type bipolar membrane filter element, an electrodeionization device with the roll-type bipolar membrane filter element and water treatment equipment. Background technique [0002] In the traditional electrochemical deionization device, the flow channel between the electrode and the ion exchange membrane is the pole water chamber, in which the oxidation reaction occurs in the anode chamber to generate oxygen, the anode water is acidic, and the anode is easily corroded; the reduction reaction occurs in the cathode chamber, Hydrogen is produced, the cathode water is alkaline, and the cathode is easy to scale. Therefore, the generation of gas and scale causes the voltage drop in the electrode water chamber to increase, which makes the device work unstable and the overall efficiency is low. In addition, the electrode chamber of the electrochemical deionization device d...

Claims

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Application Information

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IPC IPC(8): C02F1/469B01D61/48
CPCC02F1/4695B01D61/445B01D61/48C02F2303/22Y02A20/124
Inventor 陈小平
Owner 广东栗子科技有限公司
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