Low-temperature plasma cooperating two-phase catalyzing device and harmful exhaust gas processing method

A technology of low-temperature plasma and low-temperature plasma, which is applied in the direction of separation methods, chemical instruments and methods, and noise reduction devices, can solve the problems of short residence time and insufficient chemical reaction, etc., and achieve prolonged residence time, simple structure, and convenient disassembly Effect

Active Publication Date: 2011-08-31
JIANGSU UNIV
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Problems solved by technology

This technology can ensure the safe and reliable operation of the low-temperature plasma generator in the diesel engine exhaust bench test and research work, and has good

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  • Low-temperature plasma cooperating two-phase catalyzing device and harmful exhaust gas processing method
  • Low-temperature plasma cooperating two-phase catalyzing device and harmful exhaust gas processing method
  • Low-temperature plasma cooperating two-phase catalyzing device and harmful exhaust gas processing method

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[0017] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0018] The invention is a low-temperature plasma cooperative "two-phase" catalytic device for treating harmful emissions of diesel engines. During the test, first connect the high-voltage electrodes 12 and low-voltage electrodes 16 of three or more plasma generators in parallel, and then connect the high-voltage electrodes to the variable-frequency and variable-voltage plasma power supply and the low-voltage electrodes to ground to generate plasma. Silicone pipes are used to connect the exhaust port A3 and the intake port A5 and between the exhaust port B7 and the intake port B9. Diesel engine exhaust is first passed into the oxidation phase catalytic device 2 for reaction, and then reacted with the active matrix through the plasma generator 6, and finally passed into the reducing phase catalytic device 10 for further reaction before being discha...

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Abstract

The invention discloses a low-temperature plasma cooperating two-phase catalyzing device and a harmful exhaust gas processing method, belonging to the technical field of purification of harmful exhaust gas from a diesel engine. The device provided by the invention comprises a main air inlet (1), an oxide phase catalyzing device (2), an air outlet A (3), a support A (4), a plasma generator (6), a support B (8), an air inlet B (9), a reduction phase catalyzing device (10) and a main air outlet (11). The method provided by the invention comprises the following steps of: firstly, catalyzing the oxide phase of the harmful exhaust gas through the oxide phase catalyzing device (2); secondly, dividing the gas into three or more than three flows, respectively introducing the gas flows into a double-dielectric-barrier-discharge low-temperature plasma generator to perform low-temperature plasma dielectric barrier discharge on the gas; and finally, catalyzing the reduction phase of the gas through the reduction phase catalyzing device. In the invention, two-phase catalyzing devices are combined, the conversion efficiency of the exhaust gas is further increased, and the harmful emission of thediesel engine is reduced.

Description

technical field [0001] The invention relates to the technical field of purification treatment of harmful exhaust gas from diesel engines. Background technique [0002] At present, the low-temperature plasma generator structure used in the field of aftertreatment of diesel engine emissions consists of a plasma power supply, an equivalent capacitor, a high-voltage electrode, a dielectric layer and a low-voltage electrode. Connect the high-voltage electrode to the plasma variable frequency AC power supply, the low-voltage electrode to ground, and place the dielectric material between the two electrodes, so that a uniform and stable dielectric barrier discharge will appear along the surface of the dielectric in the gap between the two electrodes. The dielectric barrier discharge method requires a high degree of ionization, sufficient energy density in the gas phase region, and a long residence time for gas components in the plasma gas phase region to treat harmful emissions from...

Claims

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Application Information

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IPC IPC(8): B01D53/94B01D53/56F01N3/18
Inventor 蔡忆昔王攀王军李小华雷利利
Owner JIANGSU UNIV
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