Method and equipment for treating volatile organic compounds by low-temperature plasma coupling adsorption

Abstract

The invention provides equipment and a method for treating volatile organic compounds by low-temperature plasma coupling adsorption, wherein a low-temperature plasma process and an adsorbing process are adopted, and volatile organic waste gas and odor gas are firstly treated by a low-temperature plasma device, and then enter an adsorbing device to be treated. When a low-temperature plasma coupling adsorption method is applied to treat organic waste gas and odor waste gas with non-methane hydrocarbon lower than 6000 ppm and sulfuretted hydrogen lower than 100 ppm, benzene in exhaust is lower than 4mg / m<3> and various odorous substances completely reach the standards in comparison with a mode of purely using an adsorbing method or purely using low-temperature plasmas; and the filling amount of an ozone disintegrant can be reduced by more than 50% and the regeneration period is prolonged by one time and more in comparison with a mode of independently using low-temperature plasmas.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a method for low-temperature plasma coupled adsorption treatment of volatile organic compounds and malodorous gases. Background technique [0002] Petroleum refining is one of the key industries that produce odor pollution. Odor gases generated during the production process of refining and chemical enterprises not only contain odor pollution such as hydrogen sulfide, mercaptans, sulfides, and ammonia, but also contain a large amount of oil gas and organic pollutants. The complex process reaction will produce a large amount of disgusting and sensitive odorous substances. Among them, inorganic and organic sulfides, ammonia and organic amines, aromatic hydrocarbons, phenols and organic acids are more harmful. At present, the sources of odor pollution include exhaust gas from installations, gas released from breathing valves in tank farms, and fugitive discharge gas from...

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Problems solved by technology

[0004] Regarding the treatment of organic waste gas by adsorption method, the most common adsorbent is activated carbon, but whether it is CN204543922U (a new type of adsorption device with improved structure), CN204619676U (an adsorption tower), CN104785025A (an activated carbon filter box), CN204522680U (a ring shape adsorption device), etc., or CN104888702A (a kind of antibacterial and deodorizing modified adsorbent), CN104923180A (a kind of adsorbent for adsorbing gasoline vapor), etc., cannot break through the adsorption empirical formula of Friedrich and Langmuir The law of dynamic adsorption and analysis of organic matter on the surface of activated carbon is revealed, that is, when the gas phase partial pressure of pollutants is lower than a certain value, it cannot be adsorbed on activated carbon. 120mg / m 3 Therefore, multi-stage adsorption towers are required, and the investment and operation costs will increase exponentially

In addition, the same adsorbent also has a large difference in the adsorption capacity of different components in the same exhaust gas, and it is difficult to achieve the benzene below 4mg / m3 stipulated in GB31571-2015 3 emission limits

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