CN114980467A - Sliding arc plasma generator device for coupling microwave arc striking - Google Patents

Sliding arc plasma generator device for coupling microwave arc striking Download PDF

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Publication number
CN114980467A
CN114980467A CN202210453120.1A CN202210453120A CN114980467A CN 114980467 A CN114980467 A CN 114980467A CN 202210453120 A CN202210453120 A CN 202210453120A CN 114980467 A CN114980467 A CN 114980467A
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plasma generator
voltage
sliding arc
microwave
arc plasma
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CN202210453120.1A
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刘成周
刘亮
林启富
马文东
江怡满
朱梁
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Hefei Institutes of Physical Science of CAS
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Hefei Institutes of Physical Science of CAS
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05HPLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
    • H05H1/00Generating plasma; Handling plasma
    • H05H1/24Generating plasma

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  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Spectroscopy & Molecular Physics (AREA)
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Abstract

The invention discloses a sliding arc plasma generator device for coupling microwave arc striking, which mainly comprises a three-stage plasma generator device: the high-voltage single-electrode plasma generator and the microwave plasma generator are used in a matched mode, arc striking is provided for the sliding arc plasma generator, the impedance change range of the sliding arc plasma is reduced, the difference value between no-load voltage and loaded voltage of a sliding arc plasma driving power supply is further reduced, the distance between electrodes of the sliding arc plasma generator is increased, and therefore high-power sliding arc plasma is generated.

Description

Sliding arc plasma generator device for coupling microwave arc striking
Technical Field
The invention relates to the field of high-end equipment, in particular to a sliding arc plasma generator device for coupling microwave arc striking, which is used for generating large-size sliding arc plasma.
Background
The gas temperature range of the sliding arc plasma is generally 1500-4000K, the sliding arc plasma is warm plasma and has the advantages of cold plasma and hot plasma, and therefore the sliding arc plasma has wide application prospects in the fields of auxiliary combustion, methane and carbon dioxide reforming, fuel cracking, material surface treatment and the like.
The current sliding arc plasma has some problems which are not solved yet, one of the main problems is that the discharge power is small, the discharge power of the current sliding arc plasma is generally between 100 and 1000W, which is mainly determined by the load characteristics of the sliding arc plasma, the electrode distance of the sliding arc plasma is gradually widened, the shortest distance between the electrodes is generally less than 5mm, and the longest distance may exceed 100mm, which causes the impedance variation range of the sliding arc plasma to be huge, a low-voltage large-current state is presented when an arc is generated at the shortest distance, and a high-voltage low-current state is presented when an arc is generated at the farthest distance, but generally, the primary-secondary side turn ratio of a high-voltage package of a driving power supply of the sliding arc plasma is fixed, and the requirements of the sliding arc plasma on the power supply voltage are difficult to match, on the premise of preferentially ensuring that the sliding arc can be broken down at the nearest part of the electrode distance, when the arc column is stretched to a certain length, the voltage and current required by the sliding arc plasma are difficult to maintain continuously, the sliding arc is annihilated, and the discharge power cannot be further improved.
In order to solve the problem, a solution for solving the problem of arc striking of the sliding arc plasma by coupling the microwave plasma is provided, so that the length of the sliding arc plasma is always kept in a longer state, and the discharge power range of the sliding arc plasma is expanded.
Disclosure of Invention
The invention aims to provide a sliding arc plasma generator device coupled with microwave arc striking so as to improve the discharge power of sliding arc plasma.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a sliding arc plasma generator device for coupling microwave arc striking comprises a high-voltage single-electrode plasma generator, a microwave plasma generator and a sliding arc plasma generator; the high-voltage single-electrode plasma generator and the microwave plasma generator are coaxially fixed through a ceramic cyclone ring, and the microwave plasma generator and the sliding arc plasma generator are coaxially fixed through an insulating ring.
Furthermore, the high-voltage single-electrode plasma generator comprises a single high-voltage electrode and a ceramic cyclone ring, wherein the single high-voltage electrode is made of conical conductive metal, the tip of the electrode is positioned at the position of an electric field peak of the rectangular waveguide, the ceramic cyclone ring is fixed on the periphery of the single high-voltage electrode, and the central axis of the single high-voltage electrode is superposed with the central axis of the ceramic cyclone ring.
Furthermore, the microwave plasma generator comprises a microwave generator, a rectangular waveguide and an insulating ring, wherein the rectangular waveguide is a stepped rectangular waveguide, the insulating ring made of ceramic or quartz and the like is sleeved in the rectangular waveguide by taking a lambda-shaped wave position along the length direction of the rectangular waveguide as a center, and the central axis of the insulating ring is superposed with the central axis of the ceramic cyclone ring. The microwave generator is connected with the rectangular waveguide.
Furthermore, the sliding arc plasma generator comprises n pairs of knife-shaped high-voltage electrodes and 2n ceramic spacers, wherein n is a positive integer, and the knife-shaped high-voltage electrodes and the ceramic spacers are symmetrically arranged in a staggered manner. The central axis of the sliding arc plasma generator is superposed with the central axis of the ceramic cyclone ring.
In the invention, lambda is the wavelength of the microwave, and when the microwave plasma generator is used, the wavelength of the microwave generated by the microwave generator is lambda.
Furthermore, the high-voltage single-electrode plasma generator, the microwave plasma generator and the sliding arc plasma generator are sequentially distributed in an upper mode, a middle mode and a lower mode on the spatial position.
The term "high voltage" in the present invention means a voltage higher than 0.5 kV.
The term "high power" in the present invention means that the discharge power is more than 2 kW.
Furthermore, the high-voltage electrode of the single high-voltage electrode plasma generator is driven by direct current, alternating current or pulse high voltage.
Furthermore, the cyclone angle alpha of the ceramic cyclone ring is selected to be more than or equal to 0 degrees and less than 90 degrees.
Furthermore, the n pairs of high-voltage electrodes of the sliding arc plasma generator are composed of n high-voltage electrodes and n ground electrodes, wherein n is a positive integer.
The n pairs of high-voltage electrodes of the sliding arc plasma generator are driven by n independent high-voltage power supplies, and the output of the power supplies can be high-voltage direct current, high-frequency high-voltage alternating current or high-voltage pulse.
The n pairs of high-voltage electrodes of the sliding arc plasma generator are driven by n independent high-voltage power supplies, and the output of the power supplies can be high-voltage direct current, high-frequency high-voltage alternating current or high-voltage pulse.
Furthermore, the shortest distance d between each pair of opposite knife-shaped high-voltage electrodes is larger than 10 mm.
The invention has the beneficial effects that:
the mode that the high-voltage single-electrode plasma is coupled with the microwave plasma solves the problems that the high-voltage single-electrode plasma is easy to discharge, but the plasma volume is small, and the problem that the microwave plasma is difficult to ignite.
Drawings
FIG. 1 is a schematic structural diagram (front view) of a high-power sliding arc plasma generator device coupled with microwave arc ignition according to the present invention;
FIG. 2 is a schematic structural diagram (top view) of a high-power sliding arc plasma generator device coupled with microwave arc ignition according to the present invention;
the reference numbers: the plasma generator comprises a 1 high-voltage single-electrode plasma generator, a 1-1 single high-voltage electrode, a 1-2 ceramic cyclone ring, a 1-3 first insulating sheath, a 2 microwave plasma generator, a 2-1 microwave generator, a 2-2 rectangular waveguide, a 2-3 insulating ring, a 3 sliding arc plasma generator, a 3-1 knife-shaped high-voltage electrode, a 3-2 ceramic spacer and a 3-3 second insulating sheath.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention without creative efforts.
According to one embodiment of the present invention, as shown in fig. 1, a high power sliding arc plasma generator device (front view) coupled with microwave ignition, the device comprises a three-stage plasma generator: a high voltage single electrode plasma generator 1, a microwave plasma generator 2 and a sliding arc plasma generator 3. The high-voltage single-electrode plasma generator 1 and the microwave plasma generator 2 are coaxially fixed through a ceramic gas rotating ring 1-2, and the microwave plasma generator 2 and the sliding arc plasma generator 3 are coaxially fixed through an insulating ring 2-3. The three plasma generators are distributed in an upper mode, a middle mode and a lower mode in spatial position.
The high-voltage single-electrode plasma generator 1 is composed of a single high-voltage electrode 1-1, a ceramic cyclone ring 1-2 and a first insulating sheath 1-3. The first insulating sheath 1-3 is connected with the ceramic cyclone ring 1-2, and the first insulating sheath 1-3 is fixed right above the ceramic cyclone ring 1-2 in a thread mode. The single high-voltage electrode 1-1 is made of conical conductive metal, the electrode tip is located at the position of an electric field peak of the rectangular waveguide 2-2, and the top of the electrode tip is deep into the top of the rectangular waveguide 2-2. The ceramic cyclone ring 1-2 is fixed on the periphery of the single high-voltage electrode 1-1, and the central axis of the single high-voltage electrode 1 is superposed with the central axis of the ceramic cyclone ring 1-2.
The microwave plasma generator 2 is composed of a microwave generator 2-1, a rectangular waveguide 2-2 and an insulating ring 2-3. The rectangular waveguide 2-2 is a rectangular waveguide with steps, an insulating ring 2-3 made of ceramic or quartz and the like is sleeved in the rectangular waveguide 2-2 by taking the position of lambda-2 (lambda is the microwave wavelength and is along the length direction of the rectangular waveguide 2-2) as the center, and the central axis of the insulating ring 2-3 is superposed with the central axis of the ceramic cyclone ring 1-2. The microwave generator 2-1 is connected to the rectangular waveguide 2-2.
The sliding arc plasma generator 3 is composed of a knife-shaped high-voltage electrode 3-1, a ceramic spacer 3-2 and a second insulating sheath 3-3, wherein the second insulating sheath 3-3 is positioned right below the rectangular waveguide and is coaxial with the insulating ring 2-3. The number of the knife-shaped high-voltage electrodes 3-1 is n pairs, the number of the ceramic spacers 3-2 is 2n, and n is a positive integer. The knife-shaped high-voltage electrodes 3-1 and the ceramic spacers 3-2 are symmetrically arranged in a staggered manner, and the central axis of the sliding arc plasma generator 3 is superposed with the central axis of the ceramic cyclone ring 1-2.
The high-voltage electrode of the single high-voltage electrode plasma generator 1 is driven by direct current, alternating current or pulse high voltage.
The cyclone angle alpha of the ceramic cyclone ring 1-2 is selected as 0.
The n pairs of high voltage electrodes of the sliding arc plasma generator 3 may be formed of n high voltage electrodes and n ground electrodes.
The n pairs of high voltage electrodes of the sliding arc plasma generator 3 are driven by n independent high voltage power supplies, and the output of the power supplies can be high voltage direct current, high frequency high voltage alternating current or high voltage pulse.
The n pairs of high voltage electrodes of the sliding arc plasma generator 3 are driven by n independent high voltage power supplies, and the output of the power supplies can be high voltage direct current, high frequency high voltage alternating current or high voltage pulse.
Fig. 2 is a top view of a high power sliding arc plasma generator device (top view) coupled with microwave arc ignition designed by the invention. The shortest distance d between each pair of opposite knife-shaped high-voltage electrodes 3-1 needs to be more than 10 mm.
The working principle of the device of the invention is as follows:
(1) working gas is introduced into the ceramic cyclone ring 1-2.
(2) Starting a high-voltage single-electrode plasma generator 1;
(3) starting the microwave plasma generator 2;
(4) and starting the sliding arc plasma generator 3 to obtain large-size high-power sliding arc plasma.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (10)

1. A sliding arc plasma generator device for coupling microwave arc striking is characterized in that: the device comprises a high-voltage single-electrode plasma generator, a microwave plasma generator and a sliding arc plasma generator; the high-voltage single-electrode plasma generator and the microwave plasma generator are coaxially fixed through the ceramic gas rotating ring, and the microwave plasma generator and the sliding arc plasma generator are coaxially fixed through the insulating ring.
2. A sliding arc plasma generator apparatus coupled with microwave ignition according to claim 1, wherein: the high-voltage single-electrode plasma generator comprises a single high-voltage electrode and a ceramic cyclone ring, wherein the single high-voltage electrode is made of conical conductive metal, the position of an electrode tip is located at the position of an electric field wave crest of a rectangular waveguide, the top of the electrode tip is deep into the top of the rectangular waveguide, the ceramic cyclone ring is fixed on the periphery of the single high-voltage electrode, and the central axis of the single high-voltage electrode is superposed with the central axis of the ceramic cyclone ring;
preferably, the high voltage single electrode plasma generator, the microwave plasma generator and the sliding arc plasma generator are distributed in an upper, middle and lower manner in spatial position in sequence.
3. A sliding arc plasma generator apparatus coupled with microwave ignition according to claim 1, wherein: the microwave plasma generator comprises a microwave generator, a rectangular waveguide and an insulating ring, wherein the rectangular waveguide is a stepped rectangular waveguide, the rectangular waveguide is sleeved in a ceramic or quartz insulating ring by taking a lambda/4 position along the length direction of the rectangular waveguide as a center, and the central axis of the insulating ring is superposed with the central axis of the ceramic cyclone ring; wherein λ is the wavelength of the microwaves, said microwaves being generated by a microwave generator; preferably, the central axis of the sliding arc plasma generator coincides with the central axis of the ceramic gas swirler.
4. A sliding arc plasma generator apparatus coupled with microwave ignition according to claim 1, wherein: the sliding arc plasma generator comprises n pairs of knife-shaped high-voltage electrodes and 2n ceramic spacers, wherein n is a positive integer, and the knife-shaped high-voltage electrodes and the ceramic spacers are symmetrically arranged in a staggered mode.
5. A sliding arc plasma generator apparatus coupled with microwave ignition according to claim 1, wherein: the high-voltage electrode of the single high-voltage electrode plasma generator is driven by direct current, alternating current or pulse high voltage.
6. A sliding arc plasma generator apparatus coupled with microwave ignition according to claim 2, wherein: the cyclone angle alpha of the ceramic cyclone ring is selected to be more than or equal to 0 degree and less than 90 degrees.
7. A sliding arc plasma generator apparatus coupled with microwave ignition according to claim 1, wherein: the sliding arc plasma generator comprises n pairs of high-voltage electrodes, wherein the n pairs of high-voltage electrodes are composed of n high-voltage electrodes and n ground electrodes, and n is a positive integer.
8. A sliding arc plasma generator system coupled with microwave ignition as claimed in claim 4 or 7, wherein: the sliding arc plasma generator has n pairs of high voltage electrodes driven with n independent high voltage power supplies, and the power supplies output high voltage DC, high frequency high voltage AC or high voltage pulse.
9. A sliding arc plasma generator apparatus coupled with microwave ignition according to claim 1, wherein: the operation method of the device comprises the following steps:
a) introducing gas into the ceramic cyclone ring;
b) starting a high-voltage single-electrode plasma generator;
c) starting a microwave plasma generator;
d) the sliding arc plasma generator was turned on.
10. A sliding arc plasma generator device coupled with microwave ignition according to claim 4, characterized in that: the shortest distance d between each pair of opposite knife-shaped high-voltage electrodes is more than 10 mm.
CN202210453120.1A 2022-04-24 2022-04-24 Sliding arc plasma generator device for coupling microwave arc striking Pending CN114980467A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210453120.1A CN114980467A (en) 2022-04-24 2022-04-24 Sliding arc plasma generator device for coupling microwave arc striking

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210453120.1A CN114980467A (en) 2022-04-24 2022-04-24 Sliding arc plasma generator device for coupling microwave arc striking

Publications (1)

Publication Number Publication Date
CN114980467A true CN114980467A (en) 2022-08-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210453120.1A Pending CN114980467A (en) 2022-04-24 2022-04-24 Sliding arc plasma generator device for coupling microwave arc striking

Country Status (1)

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