Method for removing sulfuryl fluoride by coupling plasma and chemical absorbing

Abstract

The invention belongs to the technical field of gas pollutant treatment and provides a method for removing sulfuryl fluoride by coupling plasma and chemical absorbing, which is used for removing residual sulfuryl fluoride gas after fumigating. The treatment process of the method comprises: introducing a gas containing sulfuryl fluoride into a plasma reactor, wherein the sulfuryl fluoride decomposes into harmful gas products including sulfur oxide and fluoride under the action of the plasma; and introducing the gas product of the reaction into a gas liquid absorbing tower to absorb the gas by alkali liquor, and thus removing the sulfuryl fluoride waste gas in a harmless manner. The method has the advantage that after the sulfuryl fluoride is removed by coupling a plasma technique and chemical absorption, the treated gas reaches national discharge standards. Compared with discharging the sulfuryl fluoride into the atmosphere through ventilation at present, the method protects natural environment and human health. In addition, with simple process flow and low operation cost, the method is more suitable for on-site use.

Description

technical field [0001] The invention belongs to the technical field of gas pollutant treatment, and mainly relates to a method for removing sulfuryl fluoride by plasma coupled chemical absorption. Background technique [0002] Sulfuryl fluoride, as a fumigant instead of methyl bromide, has been gradually promoted and applied worldwide. However, the toxicity of sulfuryl fluoride can damage the central nervous system. Long-term exposure will seriously affect human health and even cause death. According to the latest research findings show that: sulfuryl fluoride is a strong greenhouse gas. The global warming effect of one kilogram of sulfuryl fluoride discharged into the atmosphere is 4800 times that of one kilogram of carbon dioxide, and the content of sulfuryl fluoride in the air is increasing at a rate of 5% per year, and can exist in the air for about 36 years. Therefore, in order to protect human health and the natural environment, the harmless treatment of residual fumi...

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Problems solved by technology

[0004] Non-equilibrium plasma treatment of exhaust gas technology has been deeply studied and has been used to remove NO X , SO 2 And VOCs, etc., non-equilibrium plasma can be generated by gas discharge, including glow discharge, corona discharge, dielectric barrier discharge, microwave discharge, etc., but while non-equilibrium plasma treats waste gas, the exhaust gas still contains toxic and harmful gas components. There is a secondary pollution problem

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