A high-power plasma gas purification device

Abstract

The invention discloses a high-power plasma gas purification device, which belongs to the technical field of gas purification. The gas purification device comprises: a metal shaft and a metal electrode sleeved on the metal shaft, the edge of the metal electrode forms a circumferential linear discharge surface, an insulating medium cylinder is arranged outside the metal electrode, and the insulating medium cylinder is also A metal grounding shell is provided; the metal electrode is connected to the high-voltage pole of the high-voltage power supply through the metal shaft, and a grounding port is drawn out of the metal grounding shell to connect to the grounding end of the high-voltage power supply. The gas purification device of the present invention can increase the discharge power on the basis of increasing the discharge area, generate more plasma active components, and improve the purification efficiency of the gas to be treated.

Description

technical field [0001] The invention belongs to the technical field of gas purification, and more particularly, relates to a high-power plasma gas purification device. Background technique [0002] With the improvement of living standards, air quality problems have attracted more and more people's attention. As an emerging technology, low-temperature plasma has been used in biomedical fields such as sterilization and wound treatment in the past two decades. It contains a large amount of reactive nitrogen oxides, ultraviolet radiation, and high-energy electrons to kill bacteria and viruses There are good results. Compared with traditional air disinfection methods such as ultraviolet lamps and disinfection water, low-temperature plasma gas purification technology has the advantages of safety, high efficiency, small side effects, and low cost. Therefore, in recent years, low-temperature plasma gas purification has become a major research hotspot. . [0003] Among them, the l...

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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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