Ammonia-nitrogen electrolysis tail gas treatment system

Abstract

The invention provides an ammonia-nitrogen electrolysis tail gas treatment system. The ammonia-nitrogen electrolysis tail gas treatment system has the advantages that a first washing tower and a second washing tower are connected with the rear of a tail gas emission opening of an electrolytic tank, and peculiar smell of ammonia-nitrogen waste gas emitted from the electrolytic tank can be reduced by reducing chemicals at the first washing tower; dissipation smell of ammonia gas under the condition of high PH (potential of hydrogen) values can be removed by acidic materials such as sulfuric acidor hydrochloric acid in the second washing tower, accordingly, peculiar smell of electrolyzed tail gas can be reduced, and dissipation of the ammonia gas can be decreased; a PH value of washing liquid of the first washing tower keeps higher than 8 in procedures for reducing the smell of the gas by the aid of the reducing chemicals, and the usage amount of reducing agents can be effectively reduced.

Description

technical field [0001] The invention relates to a gas treatment device, in particular to a treatment system for ammonia nitrogen waste gas produced after ammonia nitrogen wastewater is electrolyzed. Background technique [0002] The governments of various countries have set very strict discharge standards for the ammonia nitrogen wastewater discharged by industry, so there are different ammonia nitrogen wastewater treatment methods in the industry, one of which is to use electrolysis for degradation, that is, the ammonia nitrogen wastewater is introduced into the electrolytic cell and used salt Water is used as the electrolyte, and after electrolysis, nitrogen, hydrogen, ammonia, chlorine, chloramine and other gases will be produced. However, the aforementioned gases do not meet the emission standards, and if they are discharged directly, they will produce foul odors and even pollute the environment. [0003] However, the prior art method is to use water washing and add redu...

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Problems solved by technology

[0002] The governments of various countries have set very strict discharge standards for the ammonia nitrogen wastewater discharged by industry, so there are different ammonia nitrogen wastewater treatment methods in the industry, one of which is to use electrolysis for degradation, that is, the ammonia nitrogen wastewater is introduced into the electrolytic cell and used salt Water is used as the electrolyte, and after electrolysis, nitrogen, hydrogen, ammonia, chlorine, chloramine and other gases will be produced. However, the aforementioned gases do not meet the emission standards. If they are discharged directly, they will produce foul odor and even pollute the environment.

[0003] However, the prior art method is to use water washing and add reducing substances instead of controlling the pH value and redox potential. Although reducing substances are added, the amount of reducing drugs will be greatly increased due to the acid radicals produced in the water. , and can not effectively suppress the odor of the gas

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