Method and device for treating malodorous exhaust gas by low-temperature plasma cracking oxidation reactor

Abstract

The invention belongs to the field of exhaust gas treatment and particularly relates to a method and device for treating malodorous exhaust gas by a low-temperature plasma cracking oxidation reactor. The method comprises (1) treating exhaust gas through an efficient water membrane separator and carrying out pre-cooling, (2) treating the exhaust gas through a low-temperature plasma device, (3) feeding the exhaust gas into a three-phase multimedium catalytic oxidation tower and carrying out further degradation, and (4) completely decomposing a small amount of residual ozone through a deep oxidation bed. The low-temperature plasma cracking oxidation reactor can effectively reduce the concentration of volatile organic compounds after treatment. The method has the advantages of good treatment effect (on almost all common malodorous gas), low operating cost, no secondary pollution, stable operation, simple operation and management, and out-of-the-box functionality.

Description

technical field [0001] The invention belongs to the field of waste gas treatment, and in particular relates to a method and a device for treating malodorous waste gas with a low-temperature plasma cracking oxidation reactor. Background technique [0002] The rubber water workshop of the water supply and drainage plant mainly deals with various chemical sewage generated in the rubber production process. The water contains a large amount of highly volatile toxic, harmful and organic pollutants. A large amount of toxic and harmful gases are produced in the process of sewage treatment. The main source of malodorous gas is the waste gas from the sewage station, mainly including the odor gas produced by the sump, accident pool, adjustment pool, grease trap, air flotation pool and drying pool of the styrene-butadiene rubber and butadiene rubber sewage pretreatment device. Mainly non-methane total hydrocarbons, styrene and hydrogen sulfide, etc.; among them, the concentration of VO...

AI Technical Summary

Problems solved by technology

The biological method requires a long residence time, occupies a large area, and has almost no degradation effect on hydrogen sulfide, ammonia, mercaptan and other gases, and these substances are the main pollution factors of odor

The packing is easy to block, the air distribution is uneven, and there are dead corners; the dead corners are prone to anaerobic reaction and produce malodorous gases such as hydrogen sulfide, causing secondary pollution

Therefore, the use of biological processes has certain limitations and cannot completely solve the problem of stench

Both absorption and adsorption can temporarily remove soluble waste gas, but the generation of waste water, desorption of the adsorption process and regeneration of the adsorbent all produce secondary pollution, which cannot fundamentally solve the problem of waste gas pollution

The catalytic combustion method is more suitable for the purification of high-concentration and small-volume exhaust gas. When dealing with low-concentration exhaust gas, it is necessary to use concentration processes such as activated carbon adsorption to increase the combustion calorific value of the exhaust gas. Replacing the catalyst increases the operating cost, and there are Potential danger of explosion, increased safety hazard

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