Process and device for electric cracking catalytic oxidation and electric flocculation for petroleum drilling wastewater

Abstract

The invention discloses a process for electric cracking catalytic oxidation and electric flocculation for petroleum drilling wastewater. The process comprises an electric cracking catalytic oxidation-reduction procedure and an electric flocculation procedure, wherein the electric cracking catalytic oxidation-reduction procedure is performed in a high-pressure sealing reaction tank, and the pressure in the sealing reaction tank is 0.2-0.5 Mpa. The invention further discloses a device for electric cracking catalytic oxidation and electric flocculation for petroleum drilling wastewater. The device comprises an electric cracking catalytic oxidation-reduction device and an electric flocculation device, wherein the electric cracking catalytic oxidation-reduction device comprises the sealing reaction tank, an electrolytic bath and an electrode plate, and the electrode plate in the electrolytic bath comprises a negative titanium-based coating electrode plate; the electrolytic bath is formed in the lower part in the sealing reaction tank, and a concrete layer is arranged between the electrolytic bath and the sealing reaction tank; and a copper wiring terminal is arranged in the concrete layer, and connected with the electrode plate via a graphite wiring terminal and an inert metal wiring terminal. The wastewater is treated by the process and the device of pressurizing to dissolve air at first, and then electrolyzing, and finally performing electric flocculation, disclosed by the invention, so that the effluent quality is remarkably improved.

Description

technical field [0001] The invention relates to a process and device for treating petroleum drilling wastewater, in particular to a process and device for electrolysis, catalytic oxidation and electroflocculation of petroleum drilling wastewater. Background technique [0002] At present, environmental pollution, resource shortage and other problems are becoming more and more serious, which have threatened the environment we depend on for survival. Taking environmentally friendly development and adhering to the road of sustainable development has become the main theme of human development. Wastewater treatment and discharge are an important part of the environment-friendly production model. Part of it has received increasing attention. With the development of various industries such as chemical industry, medical treatment, and manufacturing industry, the types of production sewage and the difficulty of treatment have also increased significantly. With the deepening of resear...

AI Technical Summary

Problems solved by technology

However, the pure electroflocculation process also has the disadvantages of the above-mentioned traditional electrolysis process. The main reason is that it uses an open reaction space, and the oxygen content in the water is insufficient, resulting in incomplete redox reactions in the electrolysis, and the effluent water quality is difficult to achieve the desired quality.

[0011] Because the traditional electrolysis process and electroflocculation process have the same purpose, they have not been integrated into a wastewater treatment system at present. In fact, even if they are integrated into a system, due to the existence of the above problems, it is still impossible to solve the problem of effluent water quality. Difficult to achieve the desired quality

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