Treatment method of methyl mercaptan exhaust

Abstract

The invention relates to a treatment method of methyl mercaptan exhaust, belonging to a waste gas treatment method. The treatment method of the methyl mercaptan exhaust comprises the following steps: guiding wastewater containing methyl mercaptan produced in the methylthio production process to a reactor, adjusting the pH with hydrochloric acid, and respectively introducing the methyl mercaptan exhaust and chlorine into the reactor according to a certain proportion, wherein the chlorine is bubbled through a distribution plate in the reactor to fully contact methyl mercaptan gas, the temperature of the reaction process is controlled to be 25-55 DEG C, micro negative pressure is kept in reaction through a jet pump so that the generated hydrogen chloride can be pumped away, and the jet pump realizes circulation with 20% caustic soda liquid; and hydrolyzing the materials in the reactor with 30% caustic soda liquid after the reaction, delivering the salt forming wastewater to a wastewater treatment system, and discharging the effluent reaching standards. The treatment method has unique superiority, and is low in treatment cost, low in equipment investment and simple in operation; and methyl mercaptan is transformed into other groups by a chlorine oxidation method and hydrolyzed into inorganic salts, so that a treatment effect is radically achieved.

Description

technical field [0001] The invention relates to a method for treating methyl mercaptan tail gas, belonging to the field of waste gas treatment methods. Background technique [0002] The pollution control of methyl mercaptan tail gas is a problem that often needs to be solved in the methyl thiolation reaction of chemical production units. Because the gas molecules of methyl mercaptan diffuse quickly and drift away with the wind, the stench feels heavy and has strong adhesion, which is very strong in the atmosphere. It is difficult to be decomposed. When a small amount of methyl mercaptan tail gas is emitted during production, it will fly to a place with a radius of several kilometers, causing a very bad impact on the surrounding environment. Due to the characteristics of methyl mercaptan, my country's emission standards for air pollution and odor pollutants (Gbl4554-93) limit the discharge of methyl mercaptan at the boundary of the production plant, and limit the very strict ...

AI Technical Summary

Problems solved by technology

[0002] The pollution control of methyl mercaptan tail gas is a problem that often needs to be solved in the methyl thiolation reaction of chemical production units. Because the gas molecules of methyl mercaptan diffuse quickly and drift away with the wind, the stench feels heavy and has strong adhesion, which is very strong in the atmosphere. It is difficult to be decomposed. When a small amount of methyl mercaptan tail gas is emitted during production, it will fly to a place with a radius of several kilometers, causing a very bad impact on the surrounding environment.

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