Double dielectric barrier discharge device with catalytic coating for waste gas treatment

Abstract

The invention relates to a double dielectric barrier discharge device with a catalytic coating for waste gas treatment. The double dielectric barrier discharge device comprises a shell; a gas inlet and a gas outlet are formed in the two ends of the shell; a plurality of clamping grooves are formed in the side surface of the shell and are used for allowing plate electrodes and catalytic medium plates to be put in. The double dielectric barrier discharge device provided by the invention has the structure characteristic of plasma-catalytic module integration, is used for waste gas treatment and can not only realize plasma-catalytic efficient synergistic removal of volatile organic compounds, nitrogen oxides and other gaseous pollutants, but also realize the deep oxidation of the pollutants through catalyst formula adjustment aiming at different waste gas components; relative to a two-stage type plasma catalytic device, catalyst modules are reduced, the space is saved, and the pollutant removal efficiency is improved; relative to a traditional one-stage type plasma catalytic device, the caused airflow pressure drop is less, and the energy utilization efficiency is higher; when volatile organic waste gas is treated, the appearance of sediments on the inner wall of a discharge reactor can be effectively inhibited.

Description

technical field [0001] The invention belongs to the technical field of manufacturing gas pollutant control equipment, and in particular relates to a double-dielectric barrier discharge device with a catalytic coating for waste gas treatment. Background technique [0002] Low-temperature plasma technology is an effective exhaust gas treatment technology, which can generate a large number of substances with strong chemical reactivity such as high-energy electrons and OH , O , N free radicals at room temperature, and is effective for nitrogen oxides and volatile organic compounds. It has better processing effect. Glow discharge, corona discharge, radio frequency discharge, sliding arc discharge and dielectric barrier discharge can all generate low-temperature plasma, among which dielectric barrier discharge is widely used in the field of gas pollutant control. [0003] Dielectric Barrier Discharge (DBD) is a non-equilibrium gas discharge that inserts an insulating medium into ...

AI Technical Summary

Problems solved by technology

In the traditional one-stage plasma catalytic device, the catalyst layer is placed in the plasma discharge area, resulting in a large loss of air flow pressure drop, and deposition will still occur on the inner wall of the reactor where the catalyst is not placed; when dealing with volatile organic waste gas, It can effectively suppress the appearance of deposits on the inner wall of the discharge reactor; the two-stage plasma catalytic device is equipped with a catalyst module after the plasma module, and utilizes the long-life active substances generated by the discharge reaction (mainly O 3 etc.), the pollutant molecules are further degraded in the catalyst layer, and the transient active substances generated by the plasma cannot be fully utilized, and the energy utilization rate is low

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