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

A low-temperature plasma and organic waste gas technology, applied in the field of environmental technology and waste gas treatment, can solve the problems of low organic waste gas treatment capacity, insufficient mixing, and small discharge plasma area.

Inactive Publication Date: 2008-08-13
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 C

Method used

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

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Referring to the accompanying drawings, the materials used for the center electrode 8 and the outer electrode 9 are brass and red copper respectively; the length of the center electrode is 120mm; the outer diameter of the outer electrode is 60mm, the thickness is 4mm, and the length is 400mm; the minimum distance between the two electrodes is 4mm; the magnetic field strength is 0.011 T; organic waste gas 1 is waste gas containing toluene, the concentration is 2000mg / m 3 , flow 10.8m 3 / h; the output voltage of the AC high-voltage power supply 4 is controlled at 10kV; during the experiment, the concentration of toluene is determined by activated carbon adsorption and carbon disulfide desorption gas chromatography. No attached TiO is placed downstream of the center electrode 2 When the catalyst carrier is 15, the removal rate of toluene is 56.4%; 2 When the honeycomb ceramic carrier is 15, the removal rate of toluene is 81.3%.

Embodiment 2

[0019] Referring to the accompanying drawings, the materials used for the center electrode 8 and the outer electrode 9 are brass and red copper respectively; the length of the center electrode is 120mm; the outer diameter of the outer electrode is 60mm, the thickness is 4mm, and the length is 400mm; the minimum distance between the two electrodes is 4mm; the magnetic field strength is 0.011 T; organic waste gas 1 is waste gas containing carbon tetrachloride, concentration 5500mg / m 3 , flow 10.8m 3 / h; the output voltage of the AC high-voltage power supply 4 is controlled at 10kV. No attached TiO is placed downstream of the center electrode 2 When the catalyst carrier is 15, the removal rate of toluene is 66.4%; 2 When the honeycomb ceramic carrier is 15, the removal rate of toluene is 88.4%.

Embodiment 3

[0021] Referring to the accompanying drawings, the material used for the central electrode 8 and the external electrode 9 is copper; the central electrode is 180mm long; the external electrode has an outer diameter of 102mm, a thickness of 4mm, and a length of 500mm; the minimum distance between the two electrodes is 5mm; the magnetic field strength is 0.03T; Waste gas 1 is waste gas containing xylene, concentration 3000mg / m 3 , flow 60m 3 / h; the output voltage of the AC high-voltage power supply 4 is controlled at 10kV; during the experiment, the concentration of toluene is determined by activated carbon adsorption and carbon disulfide desorption gas chromatography. No attached TiO is placed downstream of the center electrode 2 When the catalyst carrier is 15, the removal rate of toluene is 50.1%; 2 When the honeycomb ceramic carrier is 15, the removal rate of toluene is 74.5%.

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): B01D53/74B01J19/08H05H1/00
Inventor 杜长明
Owner SUN YAT SEN UNIV
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