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Quasi-zero-polar-distance electrolytic tank for water treatment

An electrolytic cell and water treatment technology, which is applied in the field of electrochemistry, can solve the problems of decreased ion exchange capacity, increased tank pressure, and inability to reduce energy consumption, etc., to achieve reduced energy consumption, reduced tank pressure, and reduced floor space. Effect

Active Publication Date: 2015-08-05
WUHAN WEIMENG ENVIRONMENTAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of water treatment, the above-mentioned "zero pole distance" electrolyzer is still not applicable, because the ion membrane will be blocked by impurity ions and organic matter in sewage, the ion exchange capacity will decrease, and the actual cell pressure will increase during operation, which cannot reduce energy consumption.

Method used

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  • Quasi-zero-polar-distance electrolytic tank for water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1: Treatment of landfill leachate in a certain landfill

[0047] One unit of quasi-zero pitch electrolytic cell is adopted, and the electrolytic cell contains 2 electrode assemblies. The cathode terminal and the anode terminal of the two electrode assemblies are respectively connected in parallel. Finally, the cathode terminal and the anode terminal connected together in parallel are connected to a pulsed DC power supply.

[0048] Taking the treatment of landfill leachate in a garbage dump as an example, under the same current density, the single-stage (including 1 cathode and 1 anode) cell The pressure data are shown in Table 1.

[0049] Table 1:

[0050]

[0051] Take 10L of landfill leachate raw water, and use a quasi-zero pole distance electrolytic cell and a traditional electrolytic cell for electrolysis to reduce the COD from 2800mg·L -1 down to 2000mg·L -1 nearby. The effective electrolysis area of ​​both electrolyzers is 400cm 2 ; The curren...

Embodiment 2

[0055] Example 2: Modification of metronidazole wastewater from a company

[0056] One unit of quasi-zero pitch electrolytic cell is adopted, and the electrolytic cell contains 4 electrode assemblies. Connect the cathode terminals and anode terminals of the four electrode assemblies in parallel respectively. Finally, the cathode terminal and the anode terminal connected together in parallel are connected to a pulsed DC power supply.

[0057] Taking the modification of metronidazole wastewater from a company as an example, under the same current density, the cell pressure of quasi-zero pitch electrolyzer, traditional electrolyzer and ion-exchange membrane electrolyzer single-stage (including 1 cathode and 1 anode) cell The data are shown in Table 3.

[0058] table 3:

[0059]

[0060] Take 10L of metronidazole wastewater, and use a quasi-zero pole distance electrolyzer and a traditional electrolyzer for electrolysis, and the concentration of metronidazole will be changed ...

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Abstract

The invention belongs to the technical field of electrochemistry and relates to a quasi-zero-polar-distance electrolytic tank for water treatment. The quasi-zero-polar-distance electrolytic tank consists of more than one electrolytic tank unit, and each electrolytic tank unit mainly comprises an electrolytic tank body and more than two electrode components inserted in the tank body; and each electrode component consists of a porous cathode, a diaphragm frame, a diaphragm and a porous anode, the size of the inner frame of the diaphragm frame is the same as that of the diaphragm, and the diaphragm is an electric insulating and water-permeable porous fibrous membrane. The electrolytic tank provided by the invention can ensure that the polar distance can be less than 1mm because the electrode polar distance can be reduced to the thickness of the porous membrane, and meanwhile, after the porous membrane absorbs water, the resistance is very low, so that the tank pressure is greatly reduced, and the energy consumption is dramatically reduced. The electrolytic tank can greatly reduce the equipment investment and the floor area of devices under the condition with the same treatment amount.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and relates to an electrochemical treatment device for water treatment, in particular to a quasi-zero pole pitch electrolytic cell for water treatment. Background technique [0002] The problem of water pollution has been widely concerned by people. Industrial wastewater, landfill leachate, domestic sewage, etc. have the characteristics of high toxicity, high organic content, complex composition and difficult treatment. It is difficult to meet the national discharge standards when the water treatment technology is currently widely used to treat these wastewater and sewage, or it requires high treatment costs. [0003] The electrocatalytic advanced oxidation technology uses an anode with a high oxygen evolution overpotential, and organic pollutants are oxidatively modified or directly mineralized on the surface of the anode during electrolysis. After the wastewater is treated by electro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
Inventor 李光张清刚涂晓波周元全
Owner WUHAN WEIMENG ENVIRONMENTAL TECH
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