CN210958932U

CN210958932U - Thermal plasma generator

Info

Publication number: CN210958932U
Application number: CN201921952376.7U
Authority: CN
Inventors: 徐从裕
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-07-07
Anticipated expiration: 2029-11-13

Abstract

The utility model discloses a thermal plasma generator, the generator includes rifle head electrode, electrode mount pad, auxiliary electrode, refractory material inoxidizing coating, refractory material protection tube, tuber pipe, working gas entry, torch export. The utility model discloses in, according to the characteristics that waste gas was administered, improved thermal plasma generator's rifle head structure for the regional electrolytic corrosion loss along with the rifle head electrode of discharging can dynamic shift, with the life of extension rifle head. In addition, in order to reduce the power consumption of the generator device, the auxiliary electrode is added in the gun head, so that the gun head electrode can adopt high-current direct current with lower voltage to carry out 'arc continuation', and the 'arc starting' of the gun head electrode is easier and the 'arc continuation' of the gun head electrode is less prone to arc interruption by controlling the arc starting power supply and the pulse high-voltage power supply of the auxiliary electrode.

Description

Thermal plasma generator

Technical Field

The utility model relates to an environmental protection technology field relates to thermal plasma generating device, especially relates to a thermal plasma generator.

Background

The thermal plasma technology is a very valuable treatment technology introduced into the field of environmental protection in recent years, the thermal plasma technology can convert electric energy into heat energy with concentrated heat, the temperature generated in an energy concentrated area can reach 3000 ℃ to 5000 ℃, and substances which are difficult to decompose, such as dioxin substances, solid waste and the like in waste gas, can be thoroughly decomposed in the temperature range.

The key parts in the thermal plasma generating device, such as a gun head for generating a thermal plasma torch, the service life of the gun head and the power consumption of the device are two major factors influencing the application of the thermal plasma generating device in the environmental protection field. At present, although the service life of the torch head can reach 300h to 600h, the requirement from the market is still a great gap, and the problem of high power consumption of the thermal plasma generating device is a key problem to be solved urgently.

The service life of the gun head and the electric energy consumed by the device are related to the structure of the gun head and the adopted discharging mode. According to the application characteristics of the thermal plasma technology in the environmental protection field, the two important contents of the utility model are that: 1. the structure of the gun head is improved; 2. and innovating the discharge mode of the gun head.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is exactly in order to compensate prior art's defect, provides an use thermal plasma generator structure in the environmental protection field, through improving rifle head structure for the discharge area can dynamic movement along with the electroerosion loss of rifle head electrode, and then prolongs the life of rifle head. Meanwhile, in order to reduce the power consumption of the device, the electrode of the gun head adopts high-current low-voltage direct current to carry out 'arc continuation', and the 'arc striking' of the electrode of the gun head and the creation of conditions for uninterrupted 'arc continuation' of the electrode of the gun head are realized by controlling an arc striking power supply and a pulse high-voltage power supply.

The utility model discloses a realize through following technical scheme:

a thermal plasma generator comprises a refractory material protection tube, wherein an electrode mounting seat is fixedly mounted at one end of the refractory material protection tube, the other end of the refractory material protection tube is a torch outlet, a gun head electrode is mounted inside the refractory material protection tube, one end of the gun head electrode is fixed on the electrode mounting seat, the other end of the gun head electrode extends into the refractory material protection tube, the number of the gun head electrodes is two, the distance between the two gun head electrodes changes along the change of the distance of the long axis direction of the electrodes, the area, closest to the two gun head electrodes, is an arc striking area of the electrodes, the area, outside the arc striking area, in the gas flowing direction, is an arc continuing area, an air pipe is further mounted on the electrode mounting seat, one end of the air pipe extends into the interior of the refractory material protection tube, and an auxiliary electrode is mounted between the air. The other end of the air pipe is provided with an air inlet.

The auxiliary electrode is introduced from the electrode mounting seat to the position between the air pipe and the arc striking area of the gun head electrode, or is introduced from the pipe wall of the refractory material protection pipe to the position between the air pipe and the arc striking area of the gun head electrode.

The electrode at the continuous arc region of the electrode of the lance head is in a linear type, a sawtooth type or an arc type.

And a refractory material protective layer is also arranged in the refractory material protective tube and is attached to the refractory material protective tube.

The interior of the refractory material protective layer is of a hollow structure, and the refractory material is alumina or zirconia.

The refractory material protection pipe is a section of metal pipeline.

The auxiliary electrode is arranged at the front end of the arc striking area of the gun head electrode, and the auxiliary electrode discharges continuously under the excitation of a pulse high-voltage power supply to send generated charged particles into the space where the gun head electrode is located.

Moreover, the charged particles entering the arc striking region make the arc striking of the gun head electrode easier, and the charged particles entering the arc continuing region make the arc continuing of the gun head electrode difficult to break;

the refractory material protective layer is arranged in the refractory material protective tube, can be made into a hollow structure with any shape and is attached to the refractory material protective tube.

Moreover, the hollow channel of the refractory material protective layer is also a working gas channel of the thermal plasma generator;

the refractory material protection tube is a section of metal pipeline and is used for protecting a refractory material protection layer, one end of the refractory material protection tube is connected with the electrode mounting seat, and the other end of the refractory material protection tube is a torch outlet;

working gas enters into through the tuber pipe of installing on the electrode mount pad the utility model discloses an among the refractory material inoxidizing coating passageway, auxiliary electrode produces charged particle under the excitation of pulse high voltage power supply, and charged particle sends into "striking" region and "continuation arc" region of rifle head electrode under working gas's air current promotes, "striking" by the striking power supply, carries out "continuation arc" by heavy current low pressure DC power supply. The flare produced in the "continuing arc" region is sent out through the flare outlet under the push of the stream of working gas.

The utility model has the advantages that: 1. the utility model discloses rifle head electrode improves, and it is regional to increase the electrode of "continuing the arc", and the point of any electroerosion loss can be replaced by other "continuing the arc" regional automation, has prolonged the life of rifle head electrode.

2. The utility model discloses the auxiliary electrode who increases for the "striking" of rifle head electrode is easier, "continuation arc" is difficult for disconnected arc simultaneously. In addition, low continuous arc direct current voltage can be adopted, and under the same high continuous arc current, the extra power consumption of the generating device can be greatly reduced.

Drawings

Fig. 1 is a schematic view of the structure of the device of the present invention in a half-section.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a schematic diagram of an electrode of the lance tip of fig. 1.

Detailed Description

As shown in fig. 1, 2 and 3, a thermal plasma generator structure comprises a gun head electrode 1, an electrode mounting seat 2, an auxiliary electrode 3, a refractory material protective layer 4, a refractory material protective tube 5, an air pipe 6, a working gas inlet 7 and a torch outlet 8;

the electrode 1 of the torch head comprises two electrodes which are made of metal materials, the distance between the two electrodes changes along with the change of the distance in the long axis direction of the electrodes, and the position of the closest distance between the two electrodes is the arc striking area of the electrode of the torch head.

One end of the gun head electrode 1 is connected with the electrode mounting seat 2, and the rest part of the electrode is inserted into the hollow interior of the refractory material protective layer 4;

a gun head electrode 1, an auxiliary electrode 3 and an air pipe 6 are arranged on the electrode mounting seat 2;

the auxiliary electrode 3 is arranged at the front end of an arc striking area of the gun head electrode 1, the auxiliary electrode 3 continuously discharges under the excitation of a pulse high-voltage power supply, and generated charged particles are sent to a space where the gun head electrode 1 is located.

Moreover, the charged particles entering the arc striking region make the arc striking of the gun head electrode 1 easier, and the charged particles entering the arc continuing region make the arc continuing of the gun head electrode 1 not easy to break;

the refractory material protective layer 4 is arranged in the refractory material protective tube 5, and the refractory material protective layer 4 can be made into a hollow structure with any shape and is attached to the refractory material protective tube 5.

Moreover, the hollow channel of the refractory material protective layer 4 is also a working gas channel of the thermal plasma generator of the utility model;

the refractory material protection tube 5 is a section of metal pipeline and is used for protecting the refractory material protection layer 4, one end of the refractory material protection tube 5 is connected with the electrode mounting seat 2, and the other end of the refractory material protection tube is provided with a torch outlet 8;

working gas enters into through the tuber pipe 6 of installing on electrode mount pad 2 the utility model discloses an among the 4 passageways of refractory material inoxidizing coating, auxiliary electrode 3 produces charged particle under the excitation of pulse high voltage power supply, and charged particle sends into "striking" region and "continuation arc" region of rifle head electrode 1 under working gas's air current promotes, carries out "striking" by the striking power supply, carries out "continuation arc" by heavy current low pressure DC power supply. The flare produced in the "continuing arc" region is sent out through flare exit 8 under the impetus of the stream of working gas.

The working gas is air or oxygen or other gas, enters the auxiliary electrode and the electrode area of the gun head along the air pipe, and blows out the flame in the 'continuous arc' area from the flame outlet;

or the working gas is waste gas, enters an ionization region and a high-temperature region of a continuous arc region, and is directly decomposed.

Claims

1. A thermal plasma generator, characterized by: the electrode protection device comprises a refractory material protection tube, wherein an electrode mounting seat is fixedly mounted at one end of the refractory material protection tube, the other end of the refractory material protection tube is a torch outlet, a gun head electrode is mounted inside the refractory material protection tube, one end of the gun head electrode is fixed on the electrode mounting seat, the other end of the gun head electrode extends into the refractory material protection tube, the number of the gun head electrodes is two, the distance between the two gun head electrodes changes along with the change of the distance in the long axis direction of the electrode, the closest region between the two gun head electrodes is an arc striking region of the electrode, the electrode region outside the arc striking region in the gas flowing direction is an arc continuing region, an air pipe is further mounted on the electrode mounting seat, one end of the air pipe extends into the refractory material protection tube, and an auxiliary electrode is mounted between.

2. A thermal plasma generator according to claim 1, wherein: the auxiliary electrode is introduced from the electrode mounting seat to the position between the air pipe and the arc striking area of the gun head electrode, or is introduced from the pipe wall of the refractory material protection pipe to the position between the air pipe and the arc striking area of the gun head electrode.

3. A thermal plasma generator according to claim 1, wherein: the electrode at the continuous arc region of the electrode of the lance head is in a linear type, a sawtooth type or an arc type.

4. A thermal plasma generator according to claim 1, wherein: and a refractory material protective layer is also arranged in the refractory material protective tube and is attached to the refractory material protective tube.

5. A thermal plasma generator according to claim 4, wherein: the interior of the refractory material protective layer is of a hollow structure, and the refractory material is alumina or zirconia.

6. A thermal plasma generator according to claim 5, wherein: the refractory material protection pipe is a section of metal pipeline.