Plasma torch and plasma torch system for gasification of solid waste

Abstract

The application provides a solid waste gasification plasma torch and a plasma torch system, wherein the solid waste gasification plasma torch comprises a shell and an electrode group, the shell has a containing space in the shell, the shell is provided with a gas inlet and a gas outlet which are connected with the containing space respectively, a plurality of electrode groups are arranged in the containing space in a matrix arrangement, and gaps exist between adjacent electrode groups, the electrode group comprises an anode and a cathode which are arranged at intervals, an ionization field is formed between the anode and the cathode, and the ionization fields between the electrode groups are communicated with each other. The service life of the solid waste gasification plasma torch is long. In addition, the electrode groups are arranged in the containing space of the shell in a matrix arrangement, the gas can pass through the ionization fields of the multiple electrode groups arranged in a matrix, the ionization path is longer, and the ionization is more uniform and sufficient.

Description

Technical Field

[0001] This invention relates to the field of solid waste treatment technology, and in particular to a plasma torch for solid waste gasification. Background Technology

[0002] In the gasification process of solid waste residue, a plasma torch is typically used as a high-temperature heat source. A plasma torch is a device that utilizes the high-temperature, high-energy electron beam generated by plasma to perform chemical reactions such as heating, melting, evaporation, oxidation, and reduction. The working principle of a plasma torch is to pass gas through an electric field between electrodes, causing the gas molecules to ionize and form plasma. Plasma is a high-temperature, high-energy ionized gas, with temperatures reaching thousands or even tens of thousands of degrees Celsius and extremely high energy density.

[0003] Currently, existing plasma torches employ a single-electrode structure. Because the solid waste gasification process requires heating to 3000-5000℃, the material requirements for the single electrode are very high, resulting in high electrode costs. Furthermore, relying on a single electrode to achieve the required temperature leads to a shorter electrode lifespan, consequently shortening the plasma torch's overall lifespan. Additionally, the single-electrode structure of existing plasma torches also results in incomplete and uneven gas ionization.

[0004] Therefore, it is necessary to provide a plasma torch for solid waste gasification with a long service life and more uniform ionization, as well as a plasma torch system having the plasma torch. Summary of the Invention

[0005] The primary objective of this invention is to provide a plasma torch for solid waste gasification that has a long service life and more uniform ionization.

[0006] The second objective of this invention is to provide a plasma torch system that has a long service life and provides more uniform ionization for solid waste gasification.

[0007] To achieve the aforementioned first objective, the present invention provides a plasma torch for solid waste gasification, comprising a shell and an electrode assembly. The shell has a accommodating space, and the shell is provided with a gas inlet and a gas outlet connected to the accommodating space, respectively. A plurality of electrode assemblies are arranged in a matrix within the accommodating space, and there are gaps between adjacent electrode assemblies. Each electrode assembly includes an anode and a cathode distributed at intervals, and an ionization field is formed between the anode and the cathode. The ionization fields between each electrode assembly are interconnected.

[0008] Compared to existing technologies, the plasma torch for solid waste gasification of the present invention employs multiple electrode groups. Each electrode group can ionize the gas using relatively low power, resulting in superimposed ionization of the gas through multiple electrode groups, thus achieving the required high temperature for the resulting plasma. Therefore, by using multiple electrode groups to achieve the same power output, the present invention improves the lifespan of the electrode groups and reduces their operating costs, resulting in a longer service life for the solid waste gasification plasma torch. Furthermore, by arranging the electrode groups in a matrix within the housing space, the gas passes through the ionization field of the multiple matrix-arranged electrode groups, resulting in a longer ionization path and more uniform and complete ionization.

[0009] Preferably, the electrode groups are spirally distributed along the same straight line.

[0010] Preferably, the electrode groups are distributed in parallel along the same straight line.

[0011] Preferably, the anode and the cathode correspond one-to-one.

[0012] Preferably, both the anode and the cathode have a cylindrical structure.

[0013] To achieve the second objective mentioned above, the present invention provides a plasma torch system, including an air distribution structure, an air source supply device, and the aforementioned solid waste gasification plasma torch. The air distribution structure has an air distribution space, and the air source supply device is connected to the air distribution structure. The air source supply device is used to supply air to the air distribution space. A plurality of the solid waste gasification plasma torches are respectively connected to the air distribution structure, and each housing is provided with a conduit connecting the gas outlet and the air distribution space between the air distribution structure and the housing. The air distribution structure is also provided with an air distribution outlet communicating with the air distribution space, and the air distribution outlet is used to communicate with the gasifier.

[0014] Compared with existing technologies, the plasma torch system of this invention features a plasma torch for solid waste gasification. This solid waste gasification plasma torch is equipped with several electrode groups, each of which can use relatively low power to ionize the gas. This results in superimposed ionization of the gas by multiple electrode groups, allowing the ionized plasma to reach the required high temperature. Therefore, by using multiple electrode groups to achieve the same power, this invention can improve the service life of the electrode groups and reduce their operating costs, thus resulting in a long service life for the solid waste gasification plasma torch. Furthermore, by arranging the electrode groups in a matrix within the housing space, the gas can pass through the ionization field of the multiple electrode groups arranged in a matrix, resulting in a longer ionization path and more uniform and thorough ionization. Additionally, this invention incorporates an air distribution structure, allowing the plasma generated by ionization within each solid waste gasification plasma torch to enter the air distribution space of the structure. An air supply device distributes air to the air distribution space, ensuring uniform plasma distribution within the space and resulting in a uniform temperature of the plasma heat source discharged from the air distribution outlet. Attached Figure Description

[0015] Figure 1 This is a structural diagram of the first embodiment of the plasma torch for solid waste gasification of the present invention.

[0016] Figure 2 This is an internal structural diagram of the second embodiment of the plasma torch for solid waste gasification of the present invention.

[0017] Figure 3 This is a structural diagram of the plasma torch system of the present invention. Detailed Implementation

[0018] To illustrate the technical content and structural features of the present invention in detail, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0019] Please see Figure 1The plasma torch 100 for solid waste gasification of the present invention includes a shell 1 and an electrode assembly 2. The shell 1 has a accommodating space 11, and the shell 1 is provided with a gas inlet 12 and a gas outlet 13 connected to the accommodating space 11. A plurality of electrode assemblies 2 are arranged in a matrix within the accommodating space 11, and there are gaps between adjacent electrode assemblies 2. The electrode assembly 2 includes an anode 21 and a cathode 22 distributed at intervals. An ionization field is formed between the anode 21 and the cathode 22, and the ionization fields between each electrode assembly 2 are connected. Gas can enter the accommodating space 11 from the gas inlet 12 of the shell 1, and then be ionized by the ionization field between the anode 21 and the cathode 22 of the electrode assembly 2, and finally be discharged from the gas outlet 13. The plasma torch 100 for solid waste gasification may also include a high-voltage power supply (not shown in the figure) and a power controller (not shown in the figure). The high-voltage power supply is electrically connected to each electrode assembly 2, and the power controller is connected to the high-voltage power supply and is used to control the high-voltage power supply to turn on or off. The electrical connection methods and principles between the high-voltage power supply and each electrode group, as well as the connection methods and principles between the power controller and the high-voltage power supply, are well known to those skilled in the art, and therefore will not be elaborated here.

[0020] Please see Figure 2 In one embodiment, the electrode groups 2 are spirally distributed along the same straight line. By arranging the electrode groups 2 in a spiral distribution, the gas can be ionized 360 degrees along the same straight line in three-dimensional space, further ensuring the uniformity of gas ionization.

[0021] Please see Figure 1 In one embodiment, the electrode groups 2 are arranged in parallel along the same straight line. By arranging the electrode groups 2 in a parallel manner, the gas ionization path is extended, allowing the gas to be ionized rapidly.

[0022] It is worth noting that the matrix arrangement of electrode group 2 is not limited to the spiral or parallel distribution described above. For example, in other embodiments, the matrix arrangement of electrode group 2 can also be in an arc shape.

[0023] Please see Figure 1 In one embodiment, the anode 21 and the cathode 22 correspond one-to-one.

[0024] Please see Figure 2 In one embodiment, both the anode 21 and the cathode 22 are cylindrical. However, this is not a limitation; for example, the anode 21 and the cathode 22 may also be sheet-like, annular, etc.

[0025] Please see Figure 3The present invention also provides a plasma torch system 200, which includes an air distribution structure 201, an air source supply device 202, and the aforementioned solid waste gasification plasma torch 100. The air distribution structure 201 has an air distribution space 201a. The air source supply device 202 is connected to the air distribution structure 201 and is used to supply air to the air distribution space 201a. Several solid waste gasification plasma torches 100 are respectively connected to the air distribution structure 201. Each housing 1 is provided with a conduit 203 connecting the gas outlet 13 and the air distribution space 201a between the air distribution structure 201 and the housing 1. The air distribution structure 201 is also provided with an air distribution outlet 201b communicating with the air distribution space 201a. The air distribution outlet 201b is used to communicate with the gasifier. The plasma generated by ionization in the plasma torch 100 of each solid waste gasification can enter the air distribution space 201a of the air distribution structure 201 through the conduit. The air supply device 202 distributes air to the air distribution space 201a, so that the plasma in the air distribution space 201a is evenly distributed. Then it is discharged from the air distribution outlet 201b and can then enter the gasification furnace.

[0026] In summary, the plasma torch system 200 of the present invention includes a plasma torch 100 for solid waste gasification. This plasma torch 100 for solid waste gasification utilizes multiple electrode groups 2, each of which can ionize the gas using relatively low power. This results in superimposed ionization of the gas by multiple electrode groups 2, enabling the formed plasma to reach the required high temperature. Therefore, by using multiple electrode groups 2 to achieve the same power output, the present invention can improve the service life of the electrode groups 2 and reduce their operating costs. Consequently, the plasma torch 100 for solid waste gasification of the present invention has a long service life. Furthermore, by arranging the electrode groups 2 in a matrix within the accommodating space 11 of the housing 1, the gas can pass through the ionization field of the multiple electrode groups 2 arranged in a matrix, resulting in a longer ionization path and more uniform and complete ionization. Furthermore, by setting up an air distribution structure 201, the present invention allows the plasma generated by ionization within each solid waste gasification plasma torch 100 to enter the air distribution space 201a of the air distribution structure 201. The air supply device 202 distributes air to the air distribution space 201a, resulting in a uniform distribution of plasma within the air distribution space 201a, thereby ensuring a uniform temperature of the plasma heat source discharged from the air distribution outlet 201b.

[0027] The above-disclosed examples are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent variations made in accordance with the claims of the present invention are within the scope of the present invention.

Claims

1. A plasma torch system, characterized in that, The system includes an air distribution structure, an air supply device, and a plasma torch for solid waste gasification. The plasma torch for solid waste gasification includes a shell and an electrode assembly. The shell has a accommodating space, and the shell has a gas inlet and a gas outlet connected to the accommodating space. There are gaps between adjacent electrode assemblies. Each electrode assembly includes anodes and cathodes distributed at intervals, and an ionization field is formed between the anodes and cathodes. The ionization fields between each electrode assembly are interconnected. Each electrode assembly is spirally distributed along the same straight line to extend the gas ionization path. The air distribution structure has an air distribution space. The air supply device is connected to the air distribution structure and is used to supply air to the air distribution space. Several plasma torches for solid waste gasification are respectively connected to the air distribution structure. Each shell and the air distribution structure are provided with a conduit connecting the gas outlet and the air distribution space. The air distribution structure also has an air distribution outlet connected to the air distribution space, and the air distribution outlet is used to connect to the gasifier.

2. The plasma torch system according to claim 1, characterized in that, The anode and the cathode correspond one-to-one.

3. The plasma torch system according to claim 1, characterized in that, Both the anode and the cathode have a cylindrical structure.

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