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

Inactive Publication Date: 2015-03-11
HEBEI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] One of the purposes of the present invention is to provide a device for generating continuous low-temperature large-section atmospheric-pressure plasma plume to solve the problems of high temperature, small cross-section and low time-duty ratio of the plasma plume produced by the existing spray gun

Method used

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

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Embodiment 1

[0037] Example 1, a device for generating a continuous low-temperature large-section atmospheric-pressure plasma plume.

[0038] like figure 1 As shown, the device provided by the present invention includes a spray gun mechanism, an air supply mechanism and a power supply mechanism.

[0039] The spray gun mechanism includes a rod-shaped metal cathode 1 , a hollow closed anode 2 and a U-shaped dielectric tube 3 . One end of the rod-shaped metal cathode 1 is grounded, and the other end is a free end. The U-shaped medium pipe 3 has a sealed end and an open end; the U-shaped medium pipe 3 is placed laterally so that the sealed end and the open end are in the same horizontal plane. The free end of the rod-shaped metal cathode 1 penetrates into the U-shaped dielectric tube 3 from the bottom of the sealed end of the U-shaped dielectric tube 3, and extends to the open end of the U-shaped dielectric tube 3. The free end of the rod-shaped metal cathode 1 is connected to the U-shaped d...

Embodiment 2

[0046] Embodiment 2, a method for generating a continuous low-temperature large-section atmospheric pressure plasma plume.

[0047] The method for producing a continuous low-temperature large-section atmospheric pressure plasma plume provided by the present invention comprises the following steps:

[0048] a. Set up the spray gun mechanism.

[0049] like figure 1 As shown, the spray gun mechanism includes a rod-shaped metal cathode 1 , a hollow closed anode 2 and a U-shaped dielectric tube 3 . One end of the rod-shaped metal cathode 1 is grounded, and the other end is a free end. The U-shaped medium pipe 3 has a sealed end and an open end; the U-shaped medium pipe 3 is placed laterally so that the sealed end and the open end are in the same horizontal plane. The free end of the rod-shaped metal cathode 1 penetrates into the U-shaped dielectric tube 3 from the bottom of the sealed end of the U-shaped dielectric tube 3, and extends to the open end of the U-shaped dielectric t...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H1/34
Inventor 李雪辰鲍文婷张盼盼楚婧娣
Owner HEBEI UNIVERSITY
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