Device and method for producing continuous low-temperature large-section atmospheric pressure plasma plumes

An atmospheric pressure plasma and large cross-section technology, applied in the field of plasma, can solve the problems of small cross-section, low time duty cycle, and high plasma plume temperature, and achieve large cross-sectional area, high time duty cycle, and low gas temperature Effect
CN104411083AInactive Publication Date: 2015-03-11HEBEI UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HEBEI UNIVERSITY
Publication Date
2015-03-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a device and a method for producing continuous low-temperature large-section atmospheric pressure plasma plumes. The device comprises a spray gun mechanism, a gas supply mechanism and a power supply mechanism, wherein the spray gun mechanism comprises a metallic cathode, a hollow closed anode and a U-shaped medium pipe; the metallic cathode extends into a central axis in the U-shaped medium pipe, and the free end is flush with the opening end of the U-shaped medium pipe; the hollow closed anode is oppositely arranged with the metallic cathode, and the central axes of the hollow closed anode and the metallic cathode are overlapped; the gas supply mechanism is used for feeding discharge gas to the U-shaped medium pipe; the power supply mechanism comprises a high-voltage direct-current power supply and a ballast resistor; the positive high voltage output end of the high-voltage direct-current power supply is electrically connected with the hollow closed anode through the ballast resistor. The device provided by the invention is a plasma spray gun device which is excited by atmospheric pressure direct current, simple in structure and low in price; the plasma plumes generated by the device have the advantages of constant time, large cross sectional area, low gas temperature during the discharge process, and high chemical reaction efficiency.
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Description

technical field

[0001] The invention relates to the technical field of low-temperature plasma, in particular to a device and method for generating a continuous low-temperature large-section atmospheric-pressure plasma plume. Background technique

[0002] The low-temperature plasma (or plasma plume) produced by atmospheric pressure uniform discharge has a wide range of application values ​​in industry, biomedicine, and military affairs, such as material preparation, surface treatment, material etching, ozone synthesis, water treatment, and industrial waste gas desulfurization Denitrification, sterilization, aircraft drag reduction, aircraft stealth and other fields. At present, dielectric barrier discharge is the most commonly used technology to generate atmospheric pressure uniform discharge plasma, but due to the limitation of the size of the discharge gap between two electrodes, the application of dielectric barrier discharge to generate uniform plasma is greatly limited. ...

Claims

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