阅读说明：本技术 一种热等离子火炬发生器 (Thermal plasma torch generator ) 是由 段志勇 于 2019-09-09 设计创作，主要内容包括：一种热等离子火炬发生器,本发明涉及热等离子处理技术领域,阳极的顶壁中部为圆台形结构,该圆台形结构的边缘与阴极下端的圆台体边缘平行设置,阳极的顶壁位于中部圆台形结构的外围部分为平顶式结构,该平顶式结构与阴极安装支架下端的平面相对称设置,两者之间的空间构成工作气体通道；上述平顶式结构的外缘设有倒角,该倒角与阴极安装支架下端外缘的倒角相对称设置,两者之间的空间构成喇叭状气体通道,喇叭状气体通道、工作气体通道以及阳极中的中心通道相贯通设置。其采用直流电、非转换电弧结构,阳极和阴极之间的电流不直接接触,等离子体在氮气等工作气体的压力作用下从阳极的环状中心喷出,与废气等接触,迅速完成反应。(The invention relates to a thermal plasma torch generator, which relates to the technical field of thermal plasma treatment.A middle part of a top wall of an anode is of a circular truncated cone-shaped structure, the edge of the circular truncated cone-shaped structure is parallel to the edge of a circular truncated cone body at the lower end of a cathode, the peripheral part of the top wall of the anode, which is positioned at the middle part of the circular truncated cone-shaped structure, is of a flat top type structure, the flat top type structure is symmetrically arranged with the plane at the lower end of a cathode mounting bracket, and a space between the flat top type structure; the outer edge of the flat top type structure is provided with a chamfer, the chamfer and the chamfer on the outer edge of the lower end of the cathode mounting bracket are symmetrically arranged, a horn-shaped gas channel is formed in the space between the chamfer and the chamfer, and the horn-shaped gas channel, the working gas channel and the central channel in the anode are communicated. The plasma is sprayed out from the annular center of the anode under the pressure action of working gas such as nitrogen and the like, and contacts with waste gas and the like to rapidly finish the reaction.)

1. A thermal plasma torch generator characterized by: the device comprises a cathode mounting support (1), a cooling cavity pressing plate (2), a cooling cavity cooling water inlet/outlet (3), a cathode (4), a cathode fixing plate (5), a gas nozzle (6), an electrode separation support (7), an anode (8), an ionization cavity (9), an ionization cavity cooling water inlet/outlet (10), a lower layer support (11), a bottom support (12), an electrode sheath (13), a flame sheath (14) and a bottom baffle (15); the cooling cavity pressing plate (2) is fixedly connected to the upper port of the cathode mounting support (1) in a threaded manner, the cathode mounting support (1) is of a hollow cylindrical structure, the lower end of the cathode mounting support is inserted into the upper port of the electrode separation support (7), the outer ring wall of the lower portion of the cathode mounting support (1) is fixedly connected with the upper wall of the electrode separation support (7) through bolts, a cathode fixing plate (5) is fixedly embedded in the lower port of the cathode mounting support (1), and the cathode (4) is fixedly embedded in the cathode fixing plate (5); the upper end of an anode (8) is inserted into the lower port of an electrode separation support (7), the outer ring wall of the anode (8) is clamped between the lower end surface of the electrode separation support (7) and the upper end surface of an ionization cavity (9), the lower end of the anode (8) is inserted into the ionization cavity (9), an electrode sheath (13) is clamped between the outer wall of the lower end of the anode (8) and the inner wall of the ionization cavity (9), the lower end of the ionization cavity (9) is inserted and fixed with a lower layer support (11), a flame sheath (14) is in threaded connection with the lower port of the anode (8), the flame sheath (14) and the anode (8) are of a vertically through structure, a support plate on the outer ring wall of the flame sheath (14) is arranged on the inner bottom surface of the ionization cavity (9), and the lower end of the flame sheath (14) penetrates through the bottom wall of the ionization cavity (9) and the lower layer support (11) in sequence and then is inserted into a bottom, the bottom baffle (15) is embedded and fixed in the bottom support (12), and the bottom support (12) is fixed on the lower surface of the lower layer support (11); a cooling cavity cooling water inlet and outlet (3) is inserted in the top wall of the cooling cavity pressure plate (2) and the annular wall of the cathode mounting bracket (1); a working gas inlet (16) is formed in the annular wall of the electrode separation support (7), a gas nozzle (6) with a circular ring structure is inserted into the inner annular wall of the electrode separation support (7), and the gas nozzle (6) is communicated with the working gas inlet (16); the annular wall of the ionization cavity (9) is connected with an ionization cavity cooling water inlet and outlet (10);

the cathode (4) is of a cylindrical structure, and the lower end of the cathode is of a cone structure; the middle part of the top wall of the anode (8) is of a circular truncated cone-shaped structure, the edge of the circular truncated cone-shaped structure is parallel to the edge of a circular truncated cone body at the lower end of the cathode (4), the peripheral part of the top wall of the anode (8) positioned on the circular truncated cone-shaped structure at the middle part is of a flat top type structure, the flat top type structure and the plane at the lower end of the cathode mounting bracket (1) are symmetrically arranged, and a space between the flat top type structure and the plane forms a working gas channel (17); the outer edge of the flat top type structure is provided with a chamfer which is symmetrically arranged with the chamfer of the outer edge of the lower end of the cathode mounting bracket (1), the space between the chamfer and the lower end of the cathode mounting bracket forms a horn-shaped gas channel (18), and the horn-shaped gas channel (18), the working gas channel (17) and the central channel (19) in the anode (8) are communicated.

2. A thermal plasma torch generator as claimed in claim 1, wherein: the electrode sheath (13) is composed of an upper ceramic layer, a magnet layer and a lower ceramic layer which are sequentially arranged from top to bottom.

3. A thermal plasma torch generator as claimed in claim 1, wherein: the ratio of the diameter to the height of the cylindrical structure of the cathode (4) is 0.8-2: 1.

4. a thermal plasma torch generator as claimed in claim 1, wherein: the diameter ratio of the upper circular surface and the lower circular surface of the circular truncated cone structure at the lower end of the cathode (4) is 3-1.2:1, and the diameter ratio of the upper circular surface of the circular truncated cone structure to the height ratio of the circular truncated cone structure is 15-5: 1.

5. A thermal plasma torch generator as claimed in claim 1, wherein: the ratio of the height to the diameter of the central channel (19) is 6-1: 1.

6. A thermal plasma torch generator as claimed in claim 1, wherein: the distance between the circular truncated cone-shaped structure in the middle of the top wall of the anode (8) and the circular truncated cone at the lower end of the cathode (4) is 0.5-5 mm.

7. A thermal plasma torch generator as claimed in claim 1, wherein: the distance between the cathode (4) and the anode (8) is 0.5-10 mm.

8. A thermal plasma torch generator as claimed in claim 1, wherein: the thickness of the bottom support (12) is 1-5 mm.

9. A thermal plasma torch generator as claimed in claim 1, wherein: the working principle is as follows: gas enters from a working gas inlet (16), is sprayed into the gas nozzle (6) through a pipeline, passes through a slit between an anode (8) and a cathode fixing plate (5) and a slit between a cathode (4) and the anode (8), the slit between the anode (8) and the cathode fixing plate (5) is of an annular structure, the slit between the cathode (4) and the anode (8) is of an approximate conical annular structure, the diameter of the upper part is large, and the diameter of the lower part is small; the distance between the cathode (4) and the anode (8) is 0.5-10mm, the cylindrical cathode (4) and the annular anode (8) are coaxially arranged, alternating current is converted into direct current by adopting a rectification technology, voltage is increased and is applied to the cathode (4) and the anode (8), high-voltage electricity is generated between the anode and the cathode and penetrates through working gas, gas molecules are ionized in a short time to form plasma, the high-temperature plasma is generated after ionization under the action of an electric field between the cathode and the anode and is ejected from the lower part through a central channel (19) in the middle of the anode (8) and a cylindrical channel in the middle of a flame sheath (14) to form hot plasma flame; the flame is used for heating waste gas or waste liquid and providing a high-temperature heat source; the cooling cavity cooling water inlet and outlet (3) is used for cooling a cooling cavity in the cathode mounting bracket (1), the ionization cavity cooling water inlet and outlet (10) is used for cooling the ionization cavity (9), the lower support (11) is used for fixing the ionization cavity (9), the electrode sheath (13) is used for isolating the electrode and other components to ensure insulation, a magnet layer in the electrode sheath (13) generates a magnetic field, plasma flame is controlled not to be greatly deflected, and the plasma flame is ensured to move downwards in the center of the central channel (19) and the flame sheath (14); the bottom support (12) is in the form of a hollow disc for connection to a scrubber tower, and the cathode (4) and anode (8) require high conductivity to ensure sufficient charge generation.

Technical Field

The invention relates to the technical field of thermal plasma treatment, in particular to a thermal plasma torch generator.

Background

The thermal plasma is generated by five methods, namely spark discharge, arc discharge, radio frequency discharge, high-frequency coupling discharge, microwave discharge and the like. Thermal plasmas can be used for the treatment of waste gases, waste liquids and solid waste, in addition to material processing. The plasma torch discharges between a cathode and an anode, working gas flows through the plasma torch and is ionized under the action of strong current to form plasma flame, and the plasma flame is jetted out through a nozzle under the action of the working gas to form jet flow flame and then is mixed with waste gas to be treated. The plasma flow heats the exhaust gas, and organic matters or halides in the exhaust gas are converted into inorganic micromolecular substances such as carbon dioxide, water and the like under the action of gas such as air and the like.

In patent number GB2534890, it is proposed that the working gas is fed through a helical duct into the discharge region between the cathode and the anode to form a plasma flame, and the exhaust gas is fed through a hollow duct of the cathode to mix with the plasma flow, both of which flow axially.

The plasma reaction process has high temperature, high reaction speed and high corrosion to the surface of equipment, so that the service life of equipment materials is short. The use of passivation layers within the walls of the reaction chamber is proposed in patent nos. GB279514 and CN 201721240822.2. The passivation layer is made of alumina, alumina mullite, zirconia, yttria, fused silica, hafnium oxide, aluminosilicate or lanthanum hexaboride. The passivation layer is more resistant to corrosion than the base material, but less resistant to thermal cracking. The passivation layer is disposed on the substrate material by spraying, physical deposition, chemical vapor deposition, brushing, and the like.

The core of the thermal plasma technology is a plasma torch head generator, also called a torch head. In the torch head, an electric field is applied to an anode and a cathode through a very close interval to generate discharge. The working gas is ionized by the energy of the current to generate plasma. The temperature of the generated plasma is high, generally from one thousand to tens of thousands of degrees. In order to prevent oxygen from oxidizing at high temperature to damage the cathode and the anode, nitrogen, argon or hydrogen is used as working gas. Nitrogen is a working gas with a wide range of applications, since it is inert and cheap.

Disclosure of Invention

The invention aims to provide a reasonably designed thermal plasma torch generator aiming at the defects and shortcomings of the prior art, which adopts a direct current and non-switching arc structure, the current between an anode and a cathode is not directly contacted, and plasma is sprayed out from the annular center of the anode under the pressure action of working gas such as nitrogen and the like and is contacted with waste gas and the like to quickly finish the reaction.

In order to achieve the purpose, the invention adopts the following technical scheme: the device comprises a cathode mounting bracket, a cooling cavity pressing plate, a cooling cavity cooling water inlet and outlet, a cathode fixing plate, a gas nozzle, an electrode separation bracket, an anode, an ionization cavity cooling water inlet and outlet, a lower layer support, a bottom support, an electrode sheath, a flame sheath and a bottom baffle; the cooling cavity pressure plate is fixedly connected to the upper port of the cathode mounting bracket in a threaded manner, the cathode mounting bracket is of a hollow cylindrical structure, the lower end of the cathode mounting bracket is inserted into the upper port of the electrode separation bracket, the outer ring wall of the lower part of the cathode mounting bracket is fixedly connected with the upper wall of the electrode separation bracket by using a bolt, a cathode fixing plate is fixedly embedded in the lower port of the cathode mounting bracket, and the cathode is fixedly embedded in the cathode fixing plate; the upper end of the anode is inserted into the lower port of the electrode separation support, the outer ring wall of the anode is clamped between the lower end surface of the electrode separation support and the upper end surface of the ionization cavity, the lower end of the anode is inserted into the ionization cavity, an electrode sheath is clamped between the outer wall of the lower end of the anode and the inner wall of the ionization cavity, the lower end of the ionization cavity is inserted and connected and fixed with the lower layer support, the lower port of the anode is in threaded connection with a flame sheath, the flame sheath and the anode are of a vertically through structure, a support plate on the outer ring wall of the flame sheath is erected on the inner bottom surface of the ionization cavity, the lower end of the flame sheath penetrates through the bottom wall of the ionization cavity and the lower layer support in sequence and then is inserted into a bottom baffle, the bottom baffle is embedded and; cooling water inlets and outlets of the cooling cavity are inserted in the top wall of the cooling cavity pressure plate and the annular wall of the cathode mounting bracket; a working gas inlet is formed in the annular wall of the electrode separation bracket, a gas nozzle with a circular ring structure is inserted into the inner annular wall of the electrode separation bracket, and the gas nozzle is communicated with the working gas inlet; the annular wall of the ionization cavity is connected with an ionization cavity cooling water inlet and outlet;

the cathode is of a cylindrical structure, and the lower end of the cathode is of a cone structure; the middle part of the top wall of the anode is of a circular truncated cone-shaped structure, the edge of the circular truncated cone-shaped structure is parallel to the edge of a circular truncated cone body at the lower end of the cathode, the peripheral part of the top wall of the anode, which is positioned at the middle circular truncated cone-shaped structure, is of a flat top type structure, the flat top type structure and the plane at the lower end of the cathode mounting bracket are symmetrically arranged, and a working gas channel is formed by the space between the flat top type structure and; the outer edge of the flat top type structure is provided with a chamfer, the chamfer and the chamfer on the outer edge of the lower end of the cathode mounting bracket are symmetrically arranged, a horn-shaped gas channel is formed in the space between the chamfer and the chamfer, and the horn-shaped gas channel, the working gas channel and the central channel in the anode are communicated.

Furthermore, the electrode sheath is composed of an upper ceramic layer, a magnet layer and a lower ceramic layer which are sequentially arranged from top to bottom.

Further, the ratio of the diameter to the height of the cylindrical structure of the cathode is 0.8-2: 1.

furthermore, the diameter ratio of the upper circular surface and the lower circular surface of the truncated cone structure at the lower end of the cathode is 3-1.2:1, and the diameter ratio of the upper circular surface of the truncated cone structure to the height ratio of the truncated cone structure is 15-5: 1.

Further, the ratio of the height to the diameter of the central channel is 6-1: 1.

Further, the distance between the circular truncated cone-shaped structure in the middle of the top wall of the anode and the circular truncated cone at the lower end of the cathode is 0.5-5 mm.

Further, the distance between the cathode and the anode is 0.5-10 mm.

Further, the thickness of the bottom support is 1-5 mm.

The working principle of the invention is as follows: the gas enters from the working gas inlet, is sprayed into the gas nozzle through a pipeline, passes through the slit between the anode and the cathode fixing plate and the slit between the cathode and the anode, the slit between the anode and the cathode fixing plate is of an annular structure, the slit between the cathode and the anode is of an approximate conical annular structure, the diameter of the upper part is large, and the diameter of the lower part is small; the distance between the cathode and the anode is 0.5-10mm, the cylindrical cathode and the annular anode are coaxially arranged, alternating current is converted into direct current by adopting a rectification technology, voltage is increased and is applied to the cathode and the anode, high voltage is generated between the cathode and the anode and penetrates through working gas to ionize gas molecules in a short time to form plasma, the high-temperature plasma is generated after ionization under the action of an electric field between the cathode and the anode and is ejected from the lower part through a central channel in the middle of the anode and a cylindrical channel in the middle of a flame sheath to form plasma flame; the flame is used for heating waste gas or waste liquid and providing a high-temperature heat source; the cooling cavity cooling water inlet and outlet are used for cooling a cooling cavity in the cathode mounting bracket, the ionization cavity cooling water inlet and outlet are used for cooling the ionization cavity, the lower layer support is used for fixing the ionization cavity, the electrode sheath is used for isolating the electrode and other components to ensure insulation, a magnetic field is generated by a magnet layer in the electrode sheath to control plasma flame not to generate large deflection and ensure that the plasma flame moves downwards in the center channel and the center of the flame sheath; the bottom support is in the form of a hollow disc for connection to components such as a scrubber tower, the cathode and anode being highly conductive to ensure sufficient charge generation.

After adopting the structure, the invention has the beneficial effects that: the invention provides a thermal plasma torch generator, which adopts a direct current, a non-conversion arc structure and a non-conversion arc structure, wherein the current between an anode and a cathode is not directly contacted, and plasma is sprayed out from the annular center of the anode under the pressure action of nitrogen and is contacted with air to quickly finish the reaction.

Description of the drawings:

fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

Description of reference numerals:

the cathode separation device comprises a cathode mounting support 1, a cooling cavity pressing plate 2, a cooling cavity cooling water inlet and outlet 3, a cathode 4, a cathode fixing plate 5, a gas nozzle 6, an electrode separation support 7, an anode 8, an ionization cavity 9, an ionization cavity cooling water inlet and outlet 10, a lower support 11, a bottom support 12, an electrode sheath 13, a flame sheath 14, a bottom baffle 15, a working gas inlet 16, a working gas channel 17, a horn-shaped gas channel 18 and a central channel 19.

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the 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, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and fig. 2, the following technical solutions are adopted in the present embodiment: the device comprises a cathode mounting bracket 1, a cooling cavity pressing plate 2, a cooling cavity cooling water inlet/outlet 3, a cathode 4, a cathode fixing plate 5, a gas nozzle 6, an electrode separation bracket 7, an anode 8, an ionization cavity 9, an ionization cavity cooling water inlet/outlet 10, a lower layer support 11, a bottom support 12, an electrode sheath 13, a flame sheath 14 and a bottom baffle 15; the cooling cavity pressing plate 2 is made of pure copper or copper-zinc alloy or copper-tin alloy containing not less than 40% of copper, and is fixedly connected to the upper port of the cathode mounting bracket 1 through threads, the cathode mounting bracket 1 (made of pure copper or copper-zinc alloy or copper-tin alloy containing not less than 40% of copper) is of a hollow cylinder structure, the lower end of the cathode mounting bracket 1 is inserted into the upper port of the electrode separation bracket 7, the outer ring wall of the lower part of the cathode mounting bracket 1 is fixedly connected with the upper wall of the electrode separation bracket 7 through bolts, a cathode fixing plate 5 is fixedly embedded in the lower port of the cathode mounting bracket 1, the cathode fixing plate 5 is of a circular structure and is made of pure copper or copper-zinc alloy or copper-tin alloy containing not less than 40%, and the cathode 4 (made of tungsten, tungsten compounds or tungsten alloys) is fixedly embedded in the cathode fixing plate 5; the upper end of an anode 8 (made of copper or copper alloy) is inserted into the lower port of an electrode separation bracket 7 (made of glass fiber, ceramic or composite material of glass fiber and ceramic), the outer annular wall of the anode 8 is clamped between the lower end surface of the electrode separation bracket 7 and the upper end surface of an ionization cavity 9 (made of copper-zinc alloy or copper-tin alloy containing not less than 40% of copper), the three are connected and fixed by bolts, the lower end of the anode 8 is inserted into the ionization cavity 9, an electrode sheath 13 is clamped between the outer wall of the lower end of the anode 8 and the inner wall of the ionization cavity 9, the electrode sheath 13 is composed of an upper ceramic layer, a magnet layer and a lower ceramic layer which are sequentially arranged from top to bottom (the upper ceramic layer and the lower ceramic layer can also be replaced by polytetrafluoroethylene layers, the magnet layer in the middle is used for controlling and regulating the flow direction of thermal plasma to move downwards, and because a large amount, under the action of a magnetic field, the flow of thermal plasma flame can be controlled not to be deflected to the pipe wall, but to move downwards along a channel in the middle of an anode, an electrode sheath 13 is cooled by cooling water to ensure that the temperature is not too high), the lower end of an ionization cavity 9 is inserted and fixed with a lower layer support 11, a flame sheath 14 (which is positioned at the lowest part of the center of a torch head and is of an annular structure and made of copper or copper-zinc alloy or copper-tin alloy with copper content not less than 40%) is in threaded connection with the lower port of the anode 8, the flame sheath 14 and the anode 8 are of a vertical through structure, a supporting plate on the outer ring wall of the flame sheath 14 is arranged on the inner bottom surface of the ionization cavity 9, the lower end of the flame sheath 14 sequentially penetrates through the bottom wall of the ionization cavity 9 and the lower layer support 11 and then is inserted in a bottom baffle 15, the bottom baffle 15 is made of ceramic, the bottom baffle 15 is embedded and fixed in a bottom support 12 with a thickness of 1-5mm and a hollow disc-shaped structure, the bottom support 12 is made of stainless steel, the bottom support 12 is a connecting piece of a torch head and other equipment, and the bottom support 12 is fixed on the lower surface of a lower layer support 11 (the lower layer support 11 is an insulating part of the bottom support 12 and the ionization cavity 9 and is made of glass fiber, ceramic or a composite material of the glass fiber and the ceramic); a cooling cavity cooling water inlet and outlet 3 is respectively inserted in the top wall of the cooling cavity pressure plate 2 and the annular wall of the cathode mounting bracket 1 (one of the cooling cavity pressure plate 2 and the annular wall of the cathode mounting bracket is used for water inlet, the other one of the cooling cavity pressure plate and the annular wall of the cathode mounting bracket 1 is used for water outlet, and the two cooling cavity cooling water inlet and outlet 3 for water inlet and the cooling cavity cooling water inlet and outlet 3 for water outlet are communicated by a pipeline); a working gas inlet 16 is formed in the annular wall of the electrode separation support 7, a gas nozzle 6 with a circular ring structure is inserted into the inner annular wall of the electrode separation support 7, a plurality of gas pore channels are distributed on the gas nozzle 6 and used for working gas circulation, and the gas nozzle 6 is communicated with the working gas inlet 16; the annular wall of the ionization cavity 9 is connected with two or more ionization cavity cooling water inlets and outlets 10 (one is used for water inlet, and one or two or more are used for water outlet, and the two are communicated by a pipeline);

the cathode 4 is in a cylindrical structure, and the ratio of the diameter to the height is 0.8-2: 1, the lower end of the cathode 4 is of a cone structure, the diameter ratio of the upper and lower circular surfaces of the cone structure is 3-1.2:1, and the diameter ratio of the upper circular surface of the cone structure to the height of the cone structure is 15-5: 1; the middle part of the top wall of the anode 8 is of a truncated cone-shaped structure, the edge of the truncated cone-shaped structure is parallel to the edge of the truncated cone body at the lower end of the cathode 4, and the distance is 0.5-5 mm; the top wall of the anode 8 is positioned at the peripheral part of the middle circular truncated cone-shaped structure and is of a flat top type structure, the flat top type structure and the plane at the lower end of the cathode mounting bracket 1 are symmetrically arranged, and the space between the flat top type structure and the plane forms a working gas channel 17; the outer edge of the flat top type structure is provided with a chamfer which is symmetrically arranged with the chamfer of the outer edge of the lower end of the cathode mounting bracket 1, the space between the two forms a horn-shaped gas channel 18, the working gas channel 17 and the central channel 19 in the anode 8 are arranged in a penetrating way, so that a conical gas channel with the diameter from the gas nozzle 16 to the cathode and the anode decreasing is formed; the ratio of the height to the diameter of the central passage 19 is 6-1: 1.

The working principle of the specific embodiment is as follows: working gas (argon, helium, nitrogen and hydrogen, or mixed gas, oxidizing gas cannot be used, so as to avoid tungsten oxide cathode) enters from a working gas inlet 16, is sprayed into the gas nozzle 6 through a pipeline, passes through a slit between the anode 8 and the cathode fixing plate 5 and a slit between the cathode 4 and the anode 8, the slit between the anode 8 and the cathode fixing plate 5 is of an annular structure, the slit between the cathode 4 and the anode 8 is of an approximately conical annular structure, the diameter of the upper part is large, and the diameter of the lower part is small; the distance between the cathode 4 and the anode 8 is 0.5-10mm, the cylindrical cathode 4 and the circular anode 8 are coaxially arranged, the anode 8 is made of copper, the cathode 4 is made of tungsten or tungsten alloy or tungsten compounds, such as thoriated tungsten and metal tungsten, alternating current is converted into direct current by adopting a rectification technology, voltage is increased and is applied to the cathode 4 and the anode 8, high voltage is generated between the anode and the cathode to break down working gas, gas molecules are ionized in a short time to form plasma, the high-temperature plasma is generated after ionization under the action of an electric field between the cathode and the anode and is ejected from the lower part through a central channel 19 in the middle of the anode 8 and a cylindrical channel in the middle of a flame sheath 14 to form hot plasma flame (the temperature of the hot plasma reaches one thousand-tens of thousands of degrees); the flame is used for heating waste gas or waste liquid and providing a high-temperature heat source; a cooling cavity cooling water inlet and outlet 3 is used for cooling a cooling cavity in the cathode mounting bracket 1, an ionization cavity cooling water inlet and outlet 10 is used for cooling the ionization cavity 9, a lower layer support 11 is used for fixing the ionization cavity 9, an electrode sheath 13 is used for isolating electrodes and other parts to ensure insulation, a magnet layer in the electrode sheath 13 generates a magnetic field, plasma flame is controlled not to generate large deflection, and the plasma flame is ensured to move downwards in the center of a central channel 19 and a flame sheath 14; the bottom support 12 is in the form of a hollow disc for connection to a washing tower or the like, and the cathode 4 and the anode 8 are required to be highly conductive to ensure sufficient charge generation.

After adopting above-mentioned structure, this embodiment's beneficial effect is: the present embodiment provides a thermal plasma torch generator, which employs a direct current, non-switching arc structure, the current between the anode and the cathode is not in direct contact, and the plasma is ejected from the annular center of the anode under the pressure of the working gas such as nitrogen, and contacts with the exhaust gas, etc., to complete the reaction rapidly.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.