Device for recovering hydrogen chloride tail gas

Abstract

The invention discloses a device for recovering hydrogen chloride tail gas. The device comprises a bittern spray pump, a spray absorption tower, an absorption liquid delivery pump and an industrial salt evaporation tank which are communicated with one another in sequence, wherein the tower top of the spray absorption tower is provided with a hydrogen chloride tail gas exhaust port; a spray header communicated with the bittern spray pump is arranged at the upper part of the tower, a hydrogen chloride tail gas inlet is formed in the lower part of the tower, and an absorption liquid outlet is formed in the bottom of the tower and is communicated with the absorption liquid delivery pump; and an inlet of the bittern spray pump is communicated with a waste bittern discharge pipeline. The device is suitable for recovering the hydrogen chloride tail gas of the marine industry, and can not only recycle tail gases containing hydrogen chloride and generated by synthesis workshops and drying workshops of products including 2,4-binitro-6-bromaniline, 2,4-binitro-6-chloroaniline or 2,6-dibromo-4-nitro-chloroaniline and the like and improve the yield and quality of industrial salts, but also reduce the production cost and avoid secondary pollution caused by dedusting water to the environment.

Description

technical field [0001] The present invention relates to the technical field of chemical equipment for products such as 2,4-dinitro-6-bromoaniline, 2,4-dinitro-6-chloroaniline or 2,6-dibromo-4-nitrochloroaniline, Specifically, it is a hydrogen chloride tail gas recovery device. Background technique [0002] In coastal areas, industrial salt, bromine, 2,4-dinitro-6-bromoaniline, 2,4-dinitro-6-chloroaniline, 2,6-dibromo-4-nitrochloroaniline, etc. All are important chemical products of the marine industry, which have special value in the development of the national economy and science and technology. With the development of my country's leading industries, they are penetrating into various industries and fields. [0003] However, in the synthesis workshop and drying workshop of 2,4-dinitro-6-bromoaniline, 2,4-dinitro-6-chloroaniline and 2,6-dibromo-4-nitrochloroaniline A large amount of tail gas mainly containing hydrogen chloride will be produced. These tail gases are generall...

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Problems solved by technology

[0003] However, in the synthesis workshop and drying workshop of 2,4-dinitro-6-bromoaniline, 2,4-dinitro-6-chloroaniline and 2,6-dibromo-4-nitrochloroaniline A large amount of tail gas mainly containing hydrogen chloride will be produced. These tail gases are generally discharged directly into the atmosphere without treatment, causing pollution to the environment; For the production of industrial salt

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