A treatment device for mixed electrochemical wastewater

Abstract

A treatment device for mixed electrochemical wastewater is disclosed. The device has three combination manners, namely an electric flocculation assembly having an electrooxidation function, an electrooxidation assembly having an electric flocculation function and an electrooxidation assembly having electroreduction and electric flocculation functions. The device has an innovative manufacturing manner and polar plate combination modes of the electrochemical wastewater treatment device, different manners of application of different polar plates in the device allow the range of pollutants that can be treated to be expanded, integrated application of the device in wastewater treatment is improved, and the device is of great significance for development of electrochemical techniques in wastewater treatment.

Description

Technical field [0001] The invention relates to the field of electrochemical wastewater treatment, in particular to a mixed electrochemical wastewater treatment device. Background technique [0002] The electrochemical wastewater treatment device is based on the electrochemical reaction theory, a wastewater treatment technology that uses different metal plates to electrochemically react under a certain direct current to remove pollutants in the wastewater. [0003] From the principle of reaction, electrochemistry is generally divided into three types: electro-flocculation, electro-oxidation and electro-reduction. Electro-flocculation generally uses sacrificial plates such as aluminum and iron as the reaction plates, which can generate a large number of flocculent new ions during the reaction process to electrolytically flocculate substances in the wastewater; electro-oxidation generally uses titanium-based coatings as the reactive electrodes. Due to its high oxidation potential, s...

AI Technical Summary

Problems solved by technology

[0005] A lot of industrial wastewater has complex components, many pollutants are separated separately, and the electrochemical reaction in a single form is often unsatisfactory. For example, in the surface treatment industry, many wastewater containing heavy metals may also contain high concentrations of surfactants, Organic substances such as reducing agents have a high COD value. Electrocoagulation, which has excellent efficiency in removing heavy metals, is powerless against organic substances in this type of wastewater. The concentration of organic substances in wastewater discharged from the pesticide and chemical industries is high, and electro-oxidation is often used. It is used in the degradation of this type of wastewater, but many wastewaters contain chlorine-based organics or organics with high oxidation potential, and the electro-oxidation also performs poorly. At this time, the assistance of electro-reduction is needed to replace organics or reduce the oxidation potential.

[0006] At present, for this kind of mixed wastewater, cumbersome and segmented reaction equipment is always used to meet the process requirements, which not only increases the manufacturing cost and treatment cost, but also increases the difficulty of operation and management, so a method that can be based on Different wastewater requirements, and then electrochemical treatment devices that combine electrochemical reactions with different reaction mechanisms become the key to technological breakthroughs

Images