Plasma generation system by tubular dielectric barrier discharge and application thereof

Abstract

A plasma generation system by tubular dielectric barrier discharge belongs to the technical field of environmental protection and is characterized by comprising discharge tubes, plasma power supplies, high-tension transformers and a gas delivery and distribution system. The discharge tubes comprise three medium tubes with identical center, wherein a closed cavity formed by external medium tube and middle medium tube is filled with conductive metal powder so as to serve as an external electrode, a gas passage is formed in an open area formed by the middle medium tube and internal medium tube, and a closed cavity in the internal medium tube is filled with the conductive metal powder so as to serve as an internal electrode. The plasma generation system is capable of avoiding the problem of electrode corrosion, generating high power and large volume plasma stably, is even in gas flow distribution, stable in discharge, and is applicable to purification treatment of waste gas pollution.

Description

technical field [0001] The invention relates to an environmental protection technology, which is a process technology and a device for generating plasma through a dielectric barrier discharge of a circular casing under atmospheric pressure and applying it to the purification of organic odor gases, specifically a dielectric barrier discharge device and its application. Background technique [0002] Dielectric Barrier Discharge (DBD), as a reliable method to generate low-temperature (non-equilibrium) plasma under atmospheric pressure, is widely used in the fields of ozone synthesis, vacuum ultraviolet light source, material surface treatment and environmental protection. Dielectric barrier discharge can realize large-area uniform discharge, and can fully ionize organic molecules, water molecules, and oxygen molecules, thereby stimulating more active species, such as -OH, O 3 , -O, energy-carrying electrons, R, H 2 o 2 etc. Compared with other discharge methods that generate...

AI Technical Summary

Problems solved by technology

[0005] 1. It cannot stably generate high-power and large-volume plasma regions under low voltage conditions, and its practicability is poor;

[0006] 2. It is easy to have partial discharge, resulting in uneven discharge;

[0007] 3. The thermal effect is obvious, the energy utilization rate is low, and the energy conversion efficiency of the plasma power supply is low;

[0008] 4. Poor adaptability, it is difficult to achieve stable discharge under the conditions of high wind speed, atmospheric pressure (normal pressure), high water vapor content and corrosive components

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