SU574100A1 - Plasma generator - Google Patents

Description

one

The invention relates to electrical engineering, and more specifically to transformer toroidal generators of low-temperature plasma operating on alternating current, including current of industrial frequency, which. can be used for continuous heating of the gas flow in various high-temperature technological processes,

Plasma generating devices in toroidal discharge chambers of the Tokamak type are known. These pulsed-type devices cannot provide heating of the gas stream and the production of a low-temperature plasma jet 1.

It is also known a device for the emission of a transformer discharge in a toroidal chamber under reduced pressure, comprising a transformer with a primary winding connected to an alternating current source and a closed toroidal kiln as the secondary winding 2,

The disadvantage of this design lies in the fact that it does not allow to reduce the operating frequency to industrial, as the transformer discharge in this case ceases to be independent. Using electrodes

to maintain the discharge, it negates its positive qualities.

The purpose of the invention is to create a design that allows the use of a transient discharge in the range of industrial frequencies and higher for continuous plasma electrodeless heating of the gas flow.

The goal is achieved by the fact that a transformer with a toroidal chamber is placed in a grounded housing in which the inlet and outlet fittings connected to the toroidal chamber and, respectively, with the gas source and reactor are fixed; connected to a high-frequency source, and additional grounded electrodes are placed on the toroidal chamber and at the outlets of the unions from the housing.

The drawing shows a cross section of a transformer generator G lasma,

The transformer plasma generator has a housing 1, into which an H-shaped transformer core 2 is placed. A toroidal discharge chamber 4 is located on the central core magnetic core 3, A torus

To the ideal chamber two nozzles 5 and 6 are connected, respectively, for the input and output of plasma-forming gas. The external electrodes 7 and 8 are mounted at the junction points of the chokes with the toroidal chamber. 12 and 13, and the external electrodes 14 and 15 are mounted on the toroidal discharge chamber. A plasma gas supply unit 16 is installed at the nozzle. Low-frequency windings 17 and 18 of the transformer are located on the side magnetic conductors. Using dissolving filters (not shown in the diagram), the windings are removed from the housing 1 of the plasma generator and connected to a source of alternating voltage of industrial frequency (not shown in the drawing).

The plasma generator works as follows

 Using assembly 16, plasma-forming gas, such as air, oxygen, nitrogen, hydrogen, helium, methane, water vapor, vapors of substances, or a mixture of them, is introduced into the choke. Using an RF generator 11, high high-frequency voltage is applied to the electrodes 7 and 8 and high-frequency capacitive (RFE) discharges between electrodes 8 and 12 are ignited in a known manner, then between 7 and 13. After that, The discharges between the electrodes 8 and 14, 14 and 7 7 and 15, 15 and 8 light up on their own. Yes, the absorption of low frequency energy begins. After increasing the conductivity of the toroidal discharge, the voltage on the electrodes 7 and 8 is reduced to a minimum level that ensures stable burning of the transformer discharge.

The absence of consumable electrodes permits heating of a transformer-type plasma generator of flows of any gases, including aggressive ones, without limiting the resource. The unit power of the plasma generator is not limited by the power of the power source, as is the case with all modern low-temperature plasma generators. The proposed design allows

to use electric power of industrial frequency for electrodeless plasma heating of a gas stream.

Claims (2)

1. Lucov S.Yu. Hot plasma and controlled nuclear synthesis. Science, Moscow, 1975, p. 292. 2. Eckert G. Plasma production by induction heating of the gas by low-frequency currents. Rocket technology and astronautics, 1971, № 8, p. 18.