Cyanide-containing wastewater treatment control system and control method

Abstract

The invention relates to the technical field of cyanide-containing wastewater treatment, in particular to a cyanide-containing wastewater treatment control system and control method.The system comprises a cyanide-containing wastewater feeding device, a sodium hydroxide dosing device, a sodium hypochlorite dosing device and three cyanide breaking reaction pools, and the cyanide-containing wastewater feeding device, the sodium hydroxide dosing device and the sodium hypochlorite dosing device are connected with the cyanide breaking reaction pools respectively.The treatment stages of the cyanide breaking reaction pools are sequentially staggered for wastewater treatment in turns to enable wastewater treatment to form a continuous cycle, therefore, wastewater treatment of each cyanide breaking reaction pool is performed intermittently in turns, the whole wastewater treatment process is continuously cycled, and the wastewater treatment efficiency is greatly improved; in addition, the agentia is dosed in a rough adjusting mode and then automatically dosed in a fine adjusting mode in the dosing process, and therefore the problem that the dosing quantity is inaccurate due to the fact that the agentia is dissolved in a lagging mode is solved; in the whole wastewater treatment process, a PLC control system performs whole-process pH monitoring and interlocking according to detection signals of a pH probe, and cyanide is effectively prevented from overflowing.

Description

technical field [0001] The invention relates to the technical field of cyanide-containing wastewater treatment, in particular to a cyanide-containing wastewater treatment control system and a control method thereof. Background technique [0002] Electroplating is one of the most polluting industries in the world today. A large amount of heavy metals (gold, silver, chromium, cadmium, nickel, lead, etc.), cyanide and other organic substances are produced during the electroplating production process. If it is not treated or the treatment fails to meet the requirements of the national discharge standard, it is likely to cause serious harm to organisms and humans. [0003] Because cyano group (-CN) is a strong complexing agent, cyanide is widely used in cyanide metallurgy and cyanide electroplating metal industry. The cyanide-containing wastewater produced in large quantities is a serious threat to human health and the lives of livestock and fish. Although many methods have bee...

AI Technical Summary

Problems solved by technology

These methods all need to use the cyanide-breaking reaction tank for reaction neutralization when carrying out cyanide wastewater treatment. In the prior art, each cyanide-breaking reaction tank is equipped with a separate feed system, which has high cost, or multiple cyanide-breaking reaction tanks A set of feed system is shared, and the feed system transports cyanide wastewater to multiple cyanide-breaking reaction tanks at the same time. In order to fully react, it needs to stop for a period of time in the middle to fully react, so the feed system needs to work intermittently, and the work efficiency is low.

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