Electrochemical oxidation treatment device and method of low-salt wastewater through micro-fluid reactor

Abstract

The invention discloses an electrochemical oxidation treatment device of a low-salt wastewater through micro-fluid reactor. An anode plate, an insulated membrane layer and a cathode plate are arrangedin the fluid direction; insulated pad layers are arranged on the outer sides of the anode plate and the cathode plate; shells are arranged on the outer sides of the insulated pad layers. The invention also discloses an electrochemical oxidation treatment method. An insulated membrane layer is only arranged between the anode plate and the cathode plate, so that a space of polar plates is greatly reduced, and the efficiency of an electrochemical reaction process is effectively improved; when a reaction device is used alone, a high action effect is achieved; according to different electrochemical oxidation processes, materials of the polar plates can be replaced; when the different polar plate materials are connected in series and the different electrochemical processes and electrochemical parameters are adopted, wastewater containing different types of pollutant substances are treated, so that the current density is increased to the maximum limit and the electrolysis time is shortened;electrochemical oxidation reaction on organic pollutants in the wastewater is directly carried out, so that secondary pollution is avoided.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to an electrochemical oxidation treatment device and method for low-salt wastewater by a microfluidic reactor. Background technique [0002] As the problem of water pollution becomes more and more serious, the legislative requirements for wastewater discharge in various countries are becoming increasingly strict. The technology of using electrochemical catalytic oxidation to treat refractory biodegradable organic pollutants has attracted widespread attention of researchers. Compared with other types of wastewater treatment technologies, the main advantages of electrochemical methods are mild reaction conditions, flexible operation, easy automation, strong selectivity, and no secondary pollution. In recent years, many researchers have begun to apply electrochemical wastewater treatment technology to high-salt / conductivity practical wastewater treatment projects such as...

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Problems solved by technology

Under normal circumstances, electrochemical wastewater treatment technology needs to be applied when the wastewater contains electrolytes such as sodium chloride or sodium sulfate. Under the action of an external power supply, the current passes through the electrolyte solution, and a redox reaction occurs on the surface of the cathode and anode; the higher the electrolyte content, the That is, the higher the conductivity, the smaller the resistance during the electrolysis reaction, and the easier the electrolysis reaction is. In the prior art, electrolytes such as NaCl / Na are often added to wastewater. 2 SO 4 To solve this problem, the prior art is not to carry out the electrochemical reaction in the electrolytic cell, and two polar plates are installed in the electrolytic cell, for the wastewater with high conductivity (high salt), it can react, but for low conductivity ( Low-salt) wastewater, in the actual wastewater treatment project, adding electrolytes to the water body will not only increase the investment cost, but also cause secondary pollution. Therefore, the improvement of wastewater electrochemical treatment technology for low conductivity (low-salt) is very necessary

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