High-power plasma gas purification device

Abstract

The invention discloses a high-power plasma gas purification device, and belongs to the technical field of gas purification. The gas purification device comprises a metal shaft and a metal electrode arranged on the metal shaft in a sleeving mode; a circumferential linear discharge face is formed on the edge of the metal electrode, an insulating medium cylinder is arranged outside the metal electrode, and a metal grounding shell is further arranged outside the insulating medium cylinder; and the metal electrode is connected with a high-voltage electrode of a high-voltage power supply through the metal shaft, and a grounding port is led out of the metal grounding shell and connected with a grounding end of the high-voltage power supply. According to the gas purification device, the discharge power can be improved on the basis of increasing the discharge area, more plasma active components are generated, and the purification efficiency of to-be-treated gas is improved.

Description

Technical field [0001] The present invention belongs to the field of gas purification technology, and more particularly to a high power plasma gas purification device. Background technique [0002] With the improvement of living standards, air quality problems are more and more attention. Low temperature plasma is used as a kind of emerging technology, often studied in biomedical fields such as sterilization, wound treatment in the past two decades, which contains a large number of active nitrogen oxides, ultraviolet radiation, and high energy electrons to kill bacterial viruses. Have a good effect. Compared to the traditional ultraviolet lamp, disinfectous water and other air murderous methods, low temperature plasma gas purification technology has the advantages of safe, efficient side effects, low cost, etc. . [0003] Among them, the low temperature plasma generated by the DIElectric Barrier Discharge (DBD), due to the blocking of the medium, can avoid discharge of the arc or...

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Problems solved by technology

[0004] For air purification, the breakdown voltage of air is high, and the existing DBD low-temperature plasma generators are difficult to take into account both the ventilation rate and the discharge intensity. The DBD discharge in the form of a packed bed can fully purify the gas to be treated. However, the large wind resistance leads to low processing efficiency and cannot operate in a large area of ​​work; the existing long-gap discharge gas purification device, by changing the electrode structure such as needle electrode discharge, wire electrode discharge, etc., generates a local distorted electric field to generate discharge. However, the local extremely uneven electrode structure leads to strong distortion of the electric field in a small area, so that the electric field strength drops rapidly at a certain distance from the electrode, and the discharge usually generated is in the corona discharge mode, the discharge current is weak, and the discharge itself The dissipated power is low, the active ingredients produced, such as active nitrogen oxides, high-energy electrons, and the content of ultraviolet radiation are small, and the sterilization effect is poor

And because the discharge channel is not completely turned on, the discharge is concentrated near the electrode, and the contact area between the gas to be treated and the plasma is small, making the treatment efficiency low

At the same time, the proportion of ozone produced by corona discharge is too high, which can easily cause discomfort to the human body and cause corrosion to objects.

In addition, the existing structure increases the electric field intensity by adding ground electrodes to enhance the discharge, such as the existing needle-plate discharge. The needle electrode array structure is used to improve the processing efficiency, and when the gas to be processed passes through, it will still pass through a certain proportion of the non-discharge area, which cannot be completely purified

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