Harmful gas conversion device with non-thermal plasma induced by dielectric barrier discharge

Abstract

The invention relates to a dielectric barrier discharge low-temperature plasma harmful gas converter, which belongs to the technical field of control of industrial waste gas and harmful emission of motor vehicles, wherein a low-temperature plasma reactor (7) of the dielectric barrier discharge low-temperature plasma harmful gas converter is a coaxial tubular dielectric barrier discharge low-temperature plasma reactor, and consists of a central low-voltage electrode (17), a quartz dielectric (15) which is coaxial with the central low-voltage electrode (17), a high-voltage electrode (16) which is packed on the outer wall of the dielectric, a polyfluortetraethylene connecting rod (14), a front end cover (11), a rear end cover (18), a front end cover air inlet interface (10), a rear end cover air outlet interface(19), a selectable air inlet and outlet interface (20), and a low-temperature plasma reaction zone which is formed by gaps between the outer wall of the central low-voltage electrode (17) and the inner wall of the quartz dielectric (15). The dielectric barrier discharge low-temperature plasma harmful gas converter has high treatment efficiency, simple equipment and no secondary pollution, does not need subsequent treatment, is easy to operate, and is suitable for treating harmful substances such as NO, CO, HC, H2S and PM.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, in particular to the technical field of transforming industrial waste gas and harmful emissions from motor vehicles by a low-temperature plasma device. Background technique [0002] With the development of social industrialization, environmental problems have become increasingly prominent. In the overall air pollution, harmful gases mainly come from industrial waste gas and motor vehicle exhaust emissions, and the "pollution contribution sharing rate" of the latter is as high as 60% to 70%. [0003] The current engine purification technology cannot effectively reduce harmful emissions from lean-burn gasoline engines and diesel engines. Because the diesel engine works in an oxygen-enriched state, the traditional three-way catalytic converter TWC (Three way catalyst) fails, which cannot effectively reduce the emission pollutants of the diesel engine. [0004] At present, the trea...

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Problems solved by technology

However, this technology has not yet reached the stage of industrial application, mainly due to the need for vacuum conditions, which greatly increases the manufacturing and maintenance costs of the equipment, and also limits the continuity of the treatment of harmful gases, thus greatly limiting its scope of application; ②Low efficiency when dealing with high-velocity harmful gases; ③The mechanical strength cannot meet the requirements of long-term continuous work under vibration conditions; ④The temperature tolerance is poor, and it cannot handle high-temperature harmful gases; ⑤Large energy consumption

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