Method for achieving ammonium chloride cooperative production through ADC foaming agent wastewater by means of total-hydrochloric acid pure hydrazine hydrate condensation

Abstract

The invention relates to ADC foaming agent production technology improvement and waste water recycling, in particular to a method for achieving ammonium chloride cooperative production through ADC foaming agent wastewater by means of total-hydrochloric acid pure hydrazine hydrate condensation. The method comprises the steps that vapor containing hydrazine is prepared from a hydrazine hydrate coarse solution at first, then the vapor containing hydrazine is rectified through a rectifying tower to obtain pure hydrazine needed for producing ADC, crystallized sodium chloride and sodium carbonate particles in the evaporation process are deposited at the bottom of an evaporator, separated through a centrifugal machine and then fed to sodium carbonate for electrolysis, urea and hydrochloric acid produced through oxidation in follow-up working procedures are added into the hydrazine hydrate obtained after rectification to be used for production of an ADC foaming agent, the obtained waste water only contains ammonium chloride, water in the ammonium chloride solution is continuously evaporated through heating, and an ammonium chloride crystal is separated out after supersaturation is reached; the method is unique, the ADC foaming agent production wastewater is converted into the water solution only containing ammonium chloride, follow-up treatment is more simple, and the obtained product is higher in value.

Description

technical field [0001] The invention relates to the improvement of the production process of the ADC foaming agent and the recycling of waste water, in particular to a method for realizing the co-production of ammonium chloride from ADC foaming agent waste water through the condensation of pure hydrazine hydrate of full hydrochloride. Background technique [0002] Application number 03132081.3, application date 2003.07.15, name ADC foaming agent recovery method and device for serious pollutants in the production process; application number 200610085350.8, application date 2006.06.12, name ADC foaming agent wastewater treatment method and integrated device; Application number: 200510017886.1, date of application: 2005.08.12, name Biurea synthesis process. The above first and third patented technologies use hydrochloric acid or hydrogen chloride gas instead of sulfuric acid to produce ADC foaming agent. The resulting wastewater contains two inorganic salts, sodium chloride and...

AI Technical Summary

Problems solved by technology

The second patented technology does not improve the production process of ADC foaming agent, but only achieves the purpose of wastewater discharge through terminal treatment.

[0003] There is currently no solution to the above problem