Electrolysis system with descaling device, and descaling method

Abstract

The invention provides an electrolysis system with a descaling device, and a descaling method. The system mainly comprises an electrolysis device, a cleaning ball storage barrel, a delivery pump and power supply, the electrolysis device is provided with a rotating device to rotate an anode plate, a characteristic that a cathode scaling at the initial stage of electrolysis is soft and can be easilyscrubbed off is utilized, cleaning balls are fed into the tank body of the electrolysis device to fully fill a gap between the electrodes, and relative displacement is generated between the electrodes when the anode plate rotates in order to make the cathode scaling scraped off by the cleaning balls without acid pickling facilities, so secondary pollution caused by cleaning of a waste liquid treatment device and residual acid is reduced, and remarkable advantages are achieved.

Description

technical field [0001] The invention relates to electrolysis equipment for water treatment, in particular to a cathode automatic cleaning electrolysis device. Background technique [0002] Electrochemical methods are used in water treatment more and more applications, such as on-site sodium hypochlorite generator to produce sodium hypochlorite, because of its safety, stability and reliability, it has been widely used, and the device has a high degree of automation and can realize unattended operation. The current problem is that the cathode generates fouling during the electrolysis process, and it is necessary to interrupt the electrolysis and switch to the descaling program. The current descaling methods include: pickling and dissolution method and reverse current method. After the cathode scaling is removed, turn to the descaling program into normal electrolysis. The pickling method will corrode the electrode and affect the life of the electrode. The pickling is not easy ...

AI Technical Summary

Problems solved by technology

The pickling method will corrode the electrode and affect the life of the electrode, the pickling is not easy to complete, and the residual scale will affect the electrolysis efficiency

In particular, pickling brings new pollution and safety problems. The cleaning effect is best with hydrochloric acid, but hydrochloric acid is a controlled hazardous chemical, and there are strict requirements for procurement, storage, and use. It is very troublesome and is generally not used. The cleaning cycle of organic weak acids such as acid is very short, and the amount of use is large. The cleaning waste liquid contains a large amount of residual acid, which needs to be treated, and there are many disadvantages.

The reverse current method will cause the original anode to undergo a reduction reaction, and the anodic oxide coating will partially generate metal products after receiving electrons. can be widely applied

[0003] Electrolytic cathode scaling is mainly caused by the accumulation of calcium and magnesium ions in the cathode, which combine with carbonate or hydroxide ions to form a double salt that adheres to the cathode plate. The initial scale of the cathode is soft and does not adhere tightly to the cathode. easy to scrub off

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