Tail gas absorbing device in acetone cyanohydrin production

Abstract

The invention relates to an organic chemical substance production device, and concretely relates to a tail gas absorbing device in acetone cyanohydrin production. The device is characterized in that an acetone pump is arranged, fresh acetone is cooled by an acetone cooler and is sent to a tail gas absorbing tower, and a waste tail gas is discharged to air. The tail gas absorbing device has the following beneficial effects: the tail gas absorbing tower is arranged to treat the tail gas of the acetone cyanohydrin device on the basis of an acetone tank, the acetone pump and the acetone cooler which have been arranged in the acetone cyanohydrin device, so the tail gas discharge problem of the acetone cyanohydrin device is solved, tail gas discharge standards reach national standards, wastewater amount reduction, energy saving, emission reduction and good economic benefits are realized, cyanogen harms are released, the safeties of onsite operators are guaranteed, the environment is protected, and country and human benefiting is realized. The device allows the cost for burning cyanogen-containing wastewater to be saved by above 2 billion yuan each year, so the device has substantial economic and social benefits.

Description

technical field [0001] The invention relates to a production device of organic chemicals, in particular to a tail gas absorption device in the production of acetone cyanohydrin. Background technique [0002] Acetone cyanohydrin is a highly toxic chemical substance, and its production method has been prepared by reacting hydrocyanic acid and acetone. During the production process, cyanide-containing tail gas will be produced, which is poisonous to on-site operators and has great harm to air pollution. The treatment of cyanide-containing tail gas produced by acetone cyanohydrin has been a technical problem that has plagued production enterprises for many years. [0003] At present, the tail gas produced by domestic acetone cyanohydrin production equipment is usually washed with spray water. The spray water after washing contains cyanide. After the spray water containing cyanide is collected, it is sent to the incinerator for incineration. The continuous expansion of the scale...

AI Technical Summary

Problems solved by technology

[0003] At present, the tail gas produced by domestic acetone cyanohydrin production equipment is usually washed with spray water. The spray water after washing contains cyanide. After the spray water containing cyanide is collected, it is sent to the incinerator for incineration. The continuous expansion of the scale of cyanohydrin production equipment has led to an increase in the amount of wastewater and an increase in cost production

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