Dielectric barrier low-temperature plasma discharge assembly

Abstract

The invention relates to a dielectric barrier low-temperature plasma discharge assembly, which comprises a barrier dielectric tube, a grounding electrode and a discharge electrode. The grounding electrode is wound on the outer side wall of the barrier dielectric tube, two ends of the grounding electrode form a fixed ring connected with a reactor body, and the discharge electrode is arranged in thebarrier dielectric tube. The dielectric barrier low-temperature plasma discharge assembly has the advantages that the dielectric barrier tube is fixed to the reactor shell through the grounding electrode wound on the barrier dielectric tube to form grounding; then, power is supplied to the discharge electrode in the barrier dielectric tube to generate fluidization discharge to form plasma; the discharge electrode is arranged in the barrier dielectric tube; therefore, dielectric barrier discharge is formed in the discharge process, and the discharge is uniform and stable, so that the dischargeassembly can be used for purifying flue gas pollutants, VOCs (volatile organic compounds) in waste gas, odor and the like at different temperatures, and is wide in application range, high in secondary voltage resistance peak value, high in input power, high in waste gas treatment flow rate, large in flow rate, small in resistance and particularly suitable for large-air-volume treatment.

Description

technical field [0001] The invention relates to a dielectric barrier low-temperature plasma discharge assembly. Background technique [0002] Glow discharge, corona discharge, and dielectric barrier discharge are the most common discharge types to obtain low-temperature plasma discharge at room temperature and pressure. [0003] Glow discharge belongs to low-pressure discharge, and its working pressure is generally lower than 10mbar. Its structure is to place two parallel electrode plates in a closed container, and use electrons to excite neutral atoms and molecules. In the ground state, energy is released in the form of light. The generation of glow discharge low-temperature plasma is limited by low pressure. Industrial applications are difficult to produce continuously and the application cost is high, so they cannot be widely used in industrial manufacturing. [0004] Corona discharge is near the tip electrode with a small radius of curvature. Since the local electric fi...

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Problems solved by technology

[0006] The operating pressure range of the dielectric barrier discharge is wide, and it can generate a large area and high energy density low-temperature non-equilibrium plasma at close to room temperature and atmospheric pressure; the discharge voltage of the planar dielectric barrier reactor is proportional to the distance between the plates on both sides of the discharge gas, Increasing the spacing will lead to an increase in the working voltage of the device, making it difficult to design and manufacture the power supply; the cylindrical electrodes of quartz glass tubes are commonly used in industry, and the number of micro-discharge channels generated between the electrodes is less than that of ceramics, and it is not as uniform and stable as ceramics, and the initial discharge voltage is also lower. Higher than when ceramic is the medium

In addition, quartz glass is not as resistant to temperature changes, dust, and wear as ceramics, and its service life is relatively low

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