Continuous electrochemical cyanogen breaking device for cyanogen-containing waste liquid

Abstract

The invention discloses a continuous electrochemical cyanogen breaking device for cyanogen-containing waste liquid, wherein the device is used as a pretreatment process for cyanogen breaking, the cyanogen breaking stability is high, the use amount of chemical reagents for treating high-concentration cyanogen-containing waste liquid can be effectively reduced, electrolyzed tail gas is absorbed through a tail gas treatment system, and the problem that an existing absorption tower is poor in treatment effect on cyanide entrained in tail gas is solved. A moving channel is provided for gas through a first adjusting area and a second adjusting area, and the area of the channel is adjusted through a first adjusting assembly and a second adjusting assembly, so that the tail gas passing speed is adjusted, the tail gas speed is prevented from being too high, and the cyanide treatment effect is improved. A spraying device is matched with an adjusting device, so that a spraying plate is aligned with the opened first adjusting area or the opened second adjusting area, and cyanide is fully sprayed on a tail gas moving channel; and meanwhile, a main spraying pipe and an annular spraying pipe are utilized to form multidirectional cross spraying, so that spraying dead angles are avoided.

Description

technical field [0001] The invention specifically relates to a continuous electrochemical cyanide breaking device for cyanide-containing waste liquid. Background technique [0002] Because cyanide is a very toxic substance, a very small amount of cyanide will kill people and animals in a short period of time, and the allowable discharge concentration is 0.5mg / L. Once it enters the water body or soil, it will cause aquatic poisoning , crop yield reduction and other hazards. High-concentration cyanide-containing waste liquid cannot be treated by biochemical methods. High-concentration cyanide can be treated by high-temperature incineration or heating hydrolysis, but they all need to consume a lot of energy, and there are many supporting facilities, complex operations, and high operating costs. In addition, chlorine gas oxidation can also be used for treatment, but since chlorine gas needs to be hydrolyzed in water, and the oxidation ability is poor, for high-concentration cya...

AI Technical Summary

Problems solved by technology

The disadvantage is that cyanide is easily entrained in the nitrogen and hydrogen discharged during the electrolysis process. Usually, the absorption tower is used to treat the entrained cyanide in the gas by spraying, but because the gas is less hindered in the absorption tower, The residence time of gas entrained with cyanide in the absorption tower is short, thus affecting the treatment effect of cyanide

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