Rotating electric-discharging low temperature plasma organic waste gases purifying device

Abstract

The present invention provides a whirl discharging non-thermal plasma organic gas purifying device, the device is composed of a AC high voltage source 4, a radial deflection terminal 8, an outside electrode 9, a field coil 11, gas circuit. The field and the tangential organic gas flow make the electrical discharge arc rotate in the high speed around the radial deflection terminal 8, and quickly push down to extinguish at the same time, meanwhile, the electric arc is ignited in the minimum distance between electrodes, and repeating the procedures, pulse-type whirl arc discharging 14 is formed, to generate a large scale whirl discharging non-thermal plasma containing active particles such as O, O2, O3, H, OH2, NO etc, UV and other element, organic feculence in the organic gas is degraded to micromolecule organic matter under the oxygenizement of active particles, even directly converted to carbon dioxide and water etc. When the down stream of the radial deflection terminal is set with a carrier 15 attached with TiO2, whirling discharging plasma to excite TiO2, forming TiO2 light-catalyzed reaction, organic feculence of undegradation by plasma is continuously oxidized and decomposed.

Description

technical field [0001] The invention relates to a rotary discharge low-temperature plasma organic waste gas purification device, which belongs to the field of environmental technology and waste gas treatment. Background technique [0002] Since 1990, research on the application of low-temperature plasma technology to control air pollutants has flourished in the international academic community, and related low-temperature plasma technologies have emerged one after another, such as electron beam, glow discharge, corona discharge, dielectric barrier discharge, and microwave discharge. , Sliding arc discharge, etc. The principle of low-temperature plasma is to apply electric energy to ionize gas to accelerate gas-phase chemical reactions, especially to generate highly oxidative free radicals for gaseous oxidation reactions, and to oxidize harmful gas pollutants into harmless or low-toxic substances. Can be effectively used for nitrogen oxides NO x , sulfur dioxide SO 2 , vol...

AI Technical Summary

Problems solved by technology

In 1988, Frenchmen Lesueur H. and Czemichowski A. proposed a sliding arc discharge device (French patent 2639172) that uses airflow to drive and cool the arc. Subsequent research found that this kind of sliding arc discharge can treat gaseous organic pollutants, such as purifying formaldehyde-containing , toluene, heptane, carbon tetrachloride, polycyclic aromatic hydrocarbons, carbon black particles and other substances (CzemichowskiA., et al.Chemtech.1996, 26 (4): 45-49.; .Plasma Chem.PlasmaProcess.2003, 24(2): 155-167.; Du Changming, et al. Chinese Journal of Electrical Engineering. 2006, 26(1): 77-81.), their production technology is at least 2 electrodes The shortcoming of this method is that the distribution of the arc in the discharge space is not uniform, and the mixing between the arc discharge and the airflow is not sufficient. , The formed discharge plasma area is small, resulting in small organic waste gas treatment capacity and low purification rate

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