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A quasi-zero pitch electrolytic cell for water treatment

An electrolytic cell and water treatment technology, applied in the field of electrochemistry, can solve the problems of inability to reduce energy consumption, decline in ion exchange capacity, and increase in cell pressure, and achieve the effects of reducing energy consumption, reducing cell pressure, and reducing floor space.

Active Publication Date: 2016-11-23
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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  • A quasi-zero pitch electrolytic cell for water treatment
  • A quasi-zero pitch electrolytic cell for water treatment
  • A quasi-zero pitch electrolytic cell for water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Example 1: Treatment of landfill leachate in a garbage dump

[0047] A quasi-zero pole pitch electrolytic cell with one unit is adopted, and the electrolytic cell contains two electrode assemblies. Connect the cathode and anode terminals of the two electrode assemblies in parallel. Finally, connect the cathode terminal and anode terminal connected in parallel with the pulse DC power supply.

[0048] Take the treatment of landfill leachate in a garbage dump as an example. Under the same current density, the quasi-zero pole-pitch electrolyzer, the traditional electrolyzer and the ion-exchange membrane electrolyzer are single-stage (including 1 cathode and 1 anode) tank. Pressure data are shown in Table 1.

[0049] Table 1:

[0050]

[0051] Take 10L of landfill leachate raw water, use quasi-zero-pole-pitch electrolyzer and traditional electrolyzer for electrolysis, reduce COD from 2800mg·L -1 Down to 2000mg·L -1 nearby. The effective electrolysis area of ​​the two electrolytic...

Embodiment 2

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

[0056] A quasi-zero pole-pitch electrolytic cell of one unit is adopted, and the electrolytic cell contains 4 electrode assemblies. Connect the cathode terminals and anode terminals of the four electrode assemblies in parallel. Finally, connect the cathode terminal and anode terminal connected in parallel with the pulse DC power supply.

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

[0058] table 3:

[0059]

[0060] Take 10L of metronidazole wastewater, use quasi-zero pole pitch electrolytic cell and traditional electrolytic cell for electrolysis, and reduce the concentration of metronidazole from 32mg·L -1 Do...

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Abstract

The invention belongs to the technical field of electrochemistry, and relates to a quasi-zero pole pitch electrolytic cell for water treatment. It consists of more than one electrolytic cell unit, and each electrolytic cell unit is mainly composed of an electrolytic cell body and more than two electrode assemblies embedded in the cell body; the electrode assembly consists of a porous cathode, a diaphragm frame, a diaphragm and a porous anode Composition, the size of the inner frame of the diaphragm frame is the same as that of the diaphragm, and the diaphragm is an electrically insulating, water-permeable porous fiber membrane. In the electrolytic cell of the present invention, since the pole distance of the electrodes can be reduced to the thickness of the porous membrane, the pole distance can be less than 1mm. At the same time, after the porous membrane absorbs water, the resistance is very low, so that the cell pressure is greatly reduced, and the energy consumption is greatly reduced. Under the condition of the same processing capacity, the electrolyzer can greatly reduce equipment investment and reduce the area occupied by the device.

Description

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

Claims

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Application Information

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