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Reactor for treating VOCs by plasma cooperating chemical catalysis

A technology of chemical catalysis and plasma, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., can solve the problems of low selectivity and high energy consumption, and achieve increased residence time, improved degradation efficiency, and improved energy utilization. Effect

Inactive Publication Date: 2011-08-17
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the concentration of VOCs in the exhaust gas is generally low (hundreds of ppm), and there are various forms, resulting in high energy consumption, CO 2 low selectivity

Method used

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  • Reactor for treating VOCs by plasma cooperating chemical catalysis
  • Reactor for treating VOCs by plasma cooperating chemical catalysis
  • Reactor for treating VOCs by plasma cooperating chemical catalysis

Examples

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Effect test

Embodiment 1

[0028] Such as figure 1 and figure 2 A plate-type plasma synergistic chemical catalysis reactor for treating VOCs waste gas is shown, including a quartz glass shell 1, one end of the shell 1 is an air inlet 6, and the other end is an air outlet 7; the outer layer of the shell 1 is wrapped The metal conductor 2, the metal conductor 2 is grounded as the outer electrode of the dielectric barrier discharge; there is a stainless steel reaction chamber 3 inside the housing 1, and the reaction chamber 3 is connected to the AC high-voltage power supply 8 as the inner electrode of the dielectric barrier discharge. The cross-sections of the housing 1 and the reaction chamber 3 are both rectangular, and one opposite wall of the reaction chamber 3 is close to the inner wall of the housing 1 and is isolated with an insulating material; the other opposite wall has a small hole with a diameter of less than 3mm. The opening ratio is 30-50%, and there is a discharge air gap 9 between the inn...

Embodiment 2

[0034] a kind of like image 3 and Figure 4 The cylinder-type reactor for cooperating chemical and catalytic treatment of VOCs with plasma includes a shell 1 (outer cylinder) with a circular cross section and a reaction chamber 3 (inner cylinder). The outer cylinder is a quartz glass tube, the outer wall of the quartz glass tube is covered with a metal conductor 2, and the metal conductor 4 is grounded as an external electrode for dielectric barrier discharge. The metal conductor 4 is silver foil or silver coating with a thickness of 0.5-1 mm. The inner cylinder is a stainless steel cylinder. The opening in the inner cylinder is used as a gas channel, and it is connected to an AC high-voltage power supply 8 as an inner electrode for dielectric barrier discharge. The opening diameter of the inner cylinder wall can be selected according to the particle size of the adsorbent 4 and the catalyst 5, which is smaller than the particle diameter of the adsorbent 4 and the catalyst ...

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Abstract

The invention discloses a reactor for treating volatile organic compounds (VOCs) by plasma cooperating chemical catalysis. The reactor comprises a shell, the shell is made of quartz glass material, one end of the shell is provided with an air inlet, and the other end of the shell is provided with an air outlet; a metallic conductive object is coated on the outer layer of the shell, and the metallic conductive object is grounded and used as a medium for blocking a discharging outer electrode; a stainless steel reaction chamber is formed in the shell, and the wall of the reaction chamber is provided with a hole, connected with an alternating current high-voltage power supply and used as a medium for blocking a discharging inner electrode; one end of the reaction chamber close to the air inlet is closed, the other end of the reaction chamber close to the air outlet is open and communicated with the air outlet, and an adsorbent and a catalyst are placed in the reaction chamber; and a certain clearance is reserved between the shell and the reaction chamber to form a medium blocked discharging air gap. The reactor integrates the functions of plasma oxidation, adsorption and catalysis, greatly increases the residence time of the VOCs in the reactor, can realize efficient degradation of the VOCs, and inhibits the generation of harmful byproducts.

Description

technical field [0001] The invention relates to a reactor for treating VOCs, in particular to a reactor for treating VOCs with plasma synergistic chemical catalysis. Background technique [0002] Volatile organic compounds (VOCs) are the second largest category of air pollutants after dust, which not only cause air pollution problems such as ozone holes and photochemical smog, but also are mostly toxic substances, causing great harm to human health . The VOCs in the exhaust gas are not only of various types, but also have a concentration of several hundred ppm, which is extremely difficult to deal with. The traditional control method of VOCs is to use activated carbon to adsorb it, but the activated carbon after adsorption is often directly discarded to landfill, which is easy to cause secondary pollution. Therefore, in recent years, the research on the control of VOCs has gradually turned to the ability to convert VOCs into harmless substances (CO 2 and H 2 O etc.) meth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/32B01D53/86B01D53/04B01D53/72
Inventor 吴祖良陆豪
Owner ZHEJIANG GONGSHANG UNIVERSITY
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