Device and method for processing VOCs through asymmetrical single-medium barrier discharge

Abstract

The invention belongs to the technical field of VOCs processing devices, and relates to a device and method for processing VOCs through asymmetrical single-medium barrier discharge. The device comprises a draught fan, a power supply and a box body. A flow equalizing plate, an electrode fixing plate and a discharging unit are arranged in the box body. The discharging unit is of an asymmetrical discharging electrode structure, and comprises a metal electrode and an insulating medium pipe. The metal electrode is prepared from a metal rod with threads and fins. A medium internal electrode preparedfrom a conductive material is arranged in the insulating medium pipe. Gas containing VOCs enters the device from the inlet, is equalized by the flow equalizing plate and then enters a high-density strong plasma discharging area to collide and react with high-activity particles produced by discharging for degradation, coking substances produced in the discharging process are collected by a groovein the metal electrode, and the discharging stability and the high processing effect and efficiency are kept. The device has the advantages of being long in cleaning cycle, high in VOCs processing efficiency and the like, and is suitable for processing VOCs pollution in related industries.

Description

technical field [0001] The invention belongs to the technical field of VOCs treatment devices, and in particular relates to a device and method for treating VOCs with an asymmetric single dielectric barrier discharge. Background technique [0002] With the continuous increase of my country's industrial production scale and the types and quantities of new products, the types and quantities of air pollutants are also increasing, and the air pollution is becoming more and more serious, which has gradually attracted people's attention to pollution control. As one of the main sources of air pollution, industrial waste gas, especially volatile organic pollutants (VOCs), has caused great harm to human health and the environment. VOCs in industrial waste gas are divided according to their sources, mainly including spray paint waste gas, plastic waste gas, Plastic waste gas, stereotyped waste gas, chemical organic waste gas and printing waste gas, etc. When the VOCs in the environme...

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Problems solved by technology

[0004] The traditional forms of dielectric barrier discharge to generate plasma include plate-plate type, coaxial cylinder type, packed bed type, etc. The structure of the discharge electrode is symmetrical. Electrons and active particles collide violently, and the macromolecular organic matter will produce oily intermediate products during the degradation process. These intermediate products will continue to adhere to the surface of the electrode in a certain form of coking and gradually accumulate. Due to the randomness of the adhesion of coking substances And unevenness, making the discharge air gap uneven, affecting the uniformity of the discharge area, reducing the discharge intensity and energy utilization rate, reducing the mineralization rate and pollutant removal rate, and even causing the partial discharge air gap to be too narrow in severe cases Small, easy to generate spark discharge or arc discharge, causing fire or even fire, so in the process of actual application, the electrodes need to be replaced or cleaned regularly, which increases the cost of device operation and maintenance

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