Electroplating sewage electrolysis treatment equipment and method

Abstract

The invention discloses electroplating sewage electrolysis treatment equipment and method, wherein the equipment comprises an anode cylinder, a first cover plate, the second cover plate, a cathode cylinder, a rerotator, an anode bar and a clear water cavity; the anode cylinder is conical and is provided with a water inlet; the first cover plate and the second cover plate are respectively arranged at two axial ends of the anode cylinder; the cathode cylinder is arranged in the anode cylinder, and an external electrolysis cavity is formed between the cathode cylinder and the anode cylinder; a tangential outlet is formed in the cathode cylinder; the rerotator is arranged at the lower part of the cathode cylinder; the anode bar is arranged in the cathode cylinder, an internal electrolysis cavity is formed between the anode bar and the cathode cylinder, one end of the anode bar is connected with a gland, and the other end of the anode bar is connected with the rerotator; and the clear water cavity is communicated with the tangential outlet and is provided with a water outlet. The method not only can effectively solve the adverse effect on electrolysis caused by impurities doped in the electroplating wastewater, too low pH of the wastewater and too high temperature, but also can eliminate the adverse effect on electrolysis caused by concentration polarization.

Description

technical field [0001] The invention belongs to the field of electroplating sewage treatment, and in particular relates to an electrolytic treatment equipment and method for electroplating sewage. Background technique [0002] In the industrial electroplating process, a large amount of electroplating wastewater is often produced. The electroplating wastewater is mainly composed of plating piece cleaning water, waste electroplating solution, equipment cooling water and bath liquid leaked from the plating tank. Electroplating wastewater often contains different concentrations of metal ions such as zinc, nickel, iron, chromium, lead, and copper. If it is discharged directly without treatment, it will not only lead to the waste and loss of some valuable non-ferrous metal resources, but also cause a certain degree of pollution to the environment, and even seriously threaten human health. [0003] The common electroplating wastewater treatment method is electrolysis, which is use...

AI Technical Summary

Problems solved by technology

But its implementation is poor, the swirl attenuation is obvious, the lower end of the anode rod is not positioned, and the axial over-positioning of the gland and the annular ring is over-positioned.

In the Chinese invention patent application with the publication number CN 102965693 A, an ultrasonic swirl electrolysis device is disclosed, which uses the action of ultrasonic waves to selectively electrolyze the valuable metals in the electroplating waste solution, which is suitable for waste with low concentration and complex composition. The liquid is used for metal recovery, but it adds external equipment ultrasonic oscillator and ultrasonic generator to assist the electrolysis, which increases the complexity of the structure

It can be seen that the structure of these cyclone electrolysis devices proposed at present is too complicated, the operation is inflexible, and the processing capacity is small

Second, the swirling degree of the electrolyte in swirl electrolysis is relatively low, which cannot well eliminate the adverse effects of concentration polarization on the electrolysis process, resulting in relatively low electrolysis efficiency

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