Treatment technology for high-concentration production wastewater

Abstract

The invention relates to a treatment technology for high-concentration production wastewater. The high-concentration production wastewater comprises phenylhydrazine hydrochloride mother liquor wastewater and phenylhydrazine mother liquor wastewater, and the phenylhydrazine hydrochloride mother liquor wastewater and the phenylhydrazine mother liquor wastewater are treated by adopting the process flow comprising macro-porous resin adsorption, super-gravity stripping deamination, sulfur removal, ozone catalytic oxidation, loading chimerism, four-effect downstream evaporation concentrating separation and fluidized bed spray granulation. The treatment technology can reduce the treatment cost, and can recycle effective ingredients in the production wastewater.

Description

Technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a treatment process for high-concentration production wastewater of phenylhydrazine hydrochloride and phenylhydrazine. Background technique [0002] In the process of producing phenylhydrazine hydrochloride and phenylhydrazine, a large amount of production process wastewater will be produced. The wastewater contains a large amount of organic phenylhydrazine and inorganic salts of ammonium chloride, ammonium sulfate, sodium chloride, etc.; if not treated, it will be Pollution to the environment and waste of resources. At present, the main treatment method for this type of wastewater is to first use the MVR multi-effect evaporation method to vaporize the salt in the wastewater, and then use the biochemical treatment method to treat the effluent. The disadvantage of this method is that it produces a large amount of mixed salt hazardous waste. Comprehensive treat...

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Problems solved by technology

[0002] In the process of producing phenylhydrazine hydrochloride and phenylhydrazine, a large amount of productive process wastewater will be produced. The wastewater contains a large amount of organic matter phenylhydrazine and inorganic salts such as ammonium chloride, ammonium sulfate, and sodium chloride; if not treated, it will be Pollution to the environment and waste of resources

At present, the main treatment method for this type of wastewater is to first use MVR multi-effect evaporation to evaporate the salt in the wastewater, and then use biochemical treatment to treat the effluent. The disadvantage of this method is that it produces a large amount of mixed salt hazardous waste. The cost of comprehensive treatment is high, and if the hazardous waste is not transferred and disposed of in time, it will occupy a large amount of factory space and affect the normal operation of the factory, and the process does not make comprehensive use of resources, resulting in a certain amount of waste

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