Decomposing device and decomposing method for chloroethylene rectification residual liquid

Abstract

The invention discloses a decomposition device and a decomposition method for vinyl chloride rectification residual liquid, the decomposition device comprises a vinyl chloride rectification residual liquid tank, a reactor, an alkali tank and an ethanol decomposition tank, the vinyl chloride rectification residual liquid, caustic soda and ethanol are respectively conveyed to the reactor to generate a first reactant and a second reactant; the decomposing device further comprises a condenser, the first outlet end of the reactor is connected with the condenser and used for outputting a first reactant, and the second outlet end of the reactor and the first inlet end of the ethanol decomposing tank are used for outputting a second reactant. The chloroethylene rectification residual liquid, caustic soda and ethanol are respectively added into a reactor for reaction, a first reactant is conveyed to a condenser, the condensed first reactant and a second reactant are conveyed to an ethanol decomposition tank, the uncondensed first reactant is reused for a production process, and the second reactant is reused for a production process. The vinyl chloride rectification residual liquid is treated, and meanwhile, the decomposed product is recycled, so that the environment-friendly treatment cost of an enterprise is reduced, and the utilization rate of the vinyl chloride rectification residual liquid is improved.

Description

technical field [0001] The invention relates to the technical field of petrochemical industry, in particular to a decomposition device and a decomposition method for vinyl chloride rectification residual liquid. Background technique [0002] Crude vinyl chloride is a high-boiling substance mainly produced by rectification of dichloroethane, which is insoluble in water. It is a colorless liquid with a chloroform-like odor at room temperature, which is toxic and potentially carcinogenic. As an intermediate in the production of crude vinyl chloride, it is about 200 tons per year. Because it is toxic and potentially carcinogenic, it can only be sent to qualified units for disposal as a hazardous waste, which increases the cost of environmental protection for enterprises. SUMMARY OF THE INVENTION [0003] In view of this, the present invention provides a device for decomposing vinyl chloride rectification raffinate and a decomposition method, and the decomposed product can be r...

AI Technical Summary

Problems solved by technology

As an intermediate in the production process of crude vinyl chloride, there are about 200 tons of it per year. Because it is toxic and potentially carcinogenic, it can only be sent to qualified units for disposal as a hazardous waste, which will increase the cost of environmental protection for enterprises.

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