Plasma cracking furnace

Abstract

The invention relates to the technical field of smelting furnaces, and discloses a plasma cracking furnace which comprises a shell, the inner wall of the shell fixedly communicates with a water outlet pipe, the bottom of the shell fixedly communicates with a water inlet pipe, the outer wall of the shell is fixedly connected with a reduction bin, the top of the reduction bin fixedly communicates with a collecting pipe, and the bottom of the reduction bin fixedly communicates with a first connecting pipe. The top of the reduction bin is fixedly communicated with an air inlet, the buffer bin is arranged in the shell, and a flow guide mechanism is arranged in the isolation bin. Gas obtained after combustible gas is recycled and combusted is guided into the collecting pipe through the backflow pipe, high temperature generated by cracking in the cracking furnace and carbon deposition in the collecting pipe are subjected to a reduction reaction, the concentration of the combustible gas is increased, the carbon deposition in the collecting pipe is reduced, meanwhile, the combustible gas of combustion supplementation components is collected and refluxed, secondary combustion is conducted, and the combustion efficiency is improved. And combustible gas generated in the cracking furnace is fully utilized.

Description

Technical Field

[0001] The present invention relates to the technical field of melting furnaces, in particular to a plasma cracking furnace. Background Art

[0002] With the rapid development of industrialization, the contradiction of garbage disposal has become more prominent. Traditional landfill occupies a large amount of land, pollutes the soil and groundwater, and incineration produces harmful gases, which endangers the environment and human health. The discovery of the high-temperature characteristics of plasma provides a direction for solving this dilemma. In an oxygen-free or oxygen-deficient environment, it can decompose waste, avoid the disadvantages of traditional incineration, and recycle resources.

[0003] Patent application number CN201420780511.5 discloses a plasma cracking furnace, which belongs to the field of mechanical technology. It solves the problem of short service life of existing plasma cracking furnaces. The plasma cracking furnace includes a furnace body with a feed port and a discharge port. An incineration chamber is provided in the furnace body, and the incineration chamber is connected to the feed port and the discharge port. An air outlet connected to the incineration chamber is also provided on the furnace body. Three plasma generators are evenly distributed around the lower part of the furnace body.

[0004] However, when the existing cracking furnace is cracking solid waste, the cracking reaction cannot be completely carried out, resulting in a large amount of impurities remaining in the cracking furnace. As a result, a large amount of carbon deposits appear in the recovery pipeline during the recovery process of combustible gas, causing the combustible gas pipeline to be blocked, affecting the efficiency of combustible gas recovery and combustion. Summary of the Invention

[0005] The object of the present invention is to provide a plasma cracking furnace to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a plasma cracking furnace, comprising a shell, wherein the inner wall of the shell is fixedly connected to a water outlet pipe, the bottom of the shell is fixedly connected to a water inlet pipe, the outer wall of the shell is fixedly connected to a reduction chamber, the top of the reduction chamber is fixedly connected to a collection pipe, the bottom of the reduction chamber is fixedly connected to a connecting pipe 1, the top of the reduction chamber is fixedly connected to an air inlet, the inner wall of the shell is fixedly connected to an isolation chamber, and the inner wall of the shell is plugged with an electrode, and further comprising: The buffer bin is arranged inside the shell, the bottom of the buffer bin is fixedly connected to a reflux pipe, the top of the buffer bin is fixedly connected to a connecting pipe 2, the inner wall of the collecting pipe is fixedly connected to a connecting pipe 3, the inner wall of the isolation bin is fixedly connected to a partition, a diversion mechanism is provided inside the isolation bin, activated carbon is added inside the reduction bin to adsorb the filtered and collected gas, and at the same time reacts with the gas generated after combustion through high temperature, the collecting pipe is used to divert the gas generated by the cracking of solid waste, the partition is used to isolate the solid waste from the combustible gas, and the air inlet is used to supplement the combustion-supporting gas.

[0007] According to the above technical solution, the collecting pipe is fixedly connected to the inner wall of the shell at one end away from the reduction bin, the connecting pipe is fixedly connected to the outer wall of the shell at one end away from the reduction bin, and the reflux pipe is fixedly connected to the inside of the isolation bin at one end away from the buffer bin. The connecting pipe is used to reflux and burn the gas generated by the cracking of the solid waste.

[0008] According to the above technical solution, the guide mechanism includes a support rod 1, the bottom of the support rod 1 is fixedly connected to a connecting plate, the bottom of the connecting plate is fixedly connected to the inner wall of the fan through a rotating shaft passing through the partition, the outer wall of the fan is fixedly connected to a centrifugal block, the outer wall of the support rod 1 is provided with a stirring assembly, the fan is used to stir the gas inside the isolation chamber, and the centrifugal block is used to increase the centrifugal force of the fan rotation.

[0009] According to the above technical solution, the stirring assembly includes a sliding sleeve, the outer wall of the sliding sleeve is fixedly connected to the support rod 2, the outer wall of the support rod 2 is rotatably connected to the extrusion block, the outer wall of the extrusion block is slidably connected to the stirring block, the outer wall of the stirring block is provided with a positioning groove, the inner wall of the stirring block is rotatably connected to the support wheel through a rotating shaft, the outer wall of the stirring block is fixedly connected to an elastic plate, the other end of the elastic plate is fixedly connected to the outer wall of the extrusion block, the stirring block is used to stir solid waste, and the extrusion block is used to extrude and crush solid waste.

[0010] According to the above technical solution, the position of connecting pipe 2 and the position of connecting pipe 3 are on the same axis, the outer wall of the buffer bin is fixedly connected to the inner wall of the shell, and the gap between connecting pipe 2 and connecting pipe 3 is connected by a one-way valve, so that the gas enters connecting pipe 3 from connecting pipe 2 through the one-way valve.

[0011] According to the above technical solution, there are three groups of collecting pipes and connecting pipes, and the three groups of collecting pipes and connecting pipes are equidistantly arrayed on the outer wall of the reduction bin with the center line of the shell as the rotation axis. There are three groups of return pipes, and the three groups of return pipes are equidistantly arrayed on the bottom of the buffer bin with the center line of the isolation bin as the rotation axis. The return pipes are used to guide the post-combustion gas.

[0012] According to the above technical solution, there are two groups of support rods, and the two groups of support rods are symmetrically arranged on the top of the connecting plate with the center line of the connecting plate as the symmetry axis. The bottom of the connecting plate is rotatably connected to the surface of the partition through a bearing. The support rods are used to stir the solid waste, and the centrifugal block is used to conduct plasma current and ignite the combustible gas at the bottom of the partition.

[0013] According to the above technical solution, the outer wall of the support wheel rolls along the inner wall of the isolation chamber, the extrusion block slides along the outer wall of the support rod 2, the inner wall of the extrusion block supports the support rod 2 through hydraulic damping, and the outer wall of the extrusion block conducts the plasma current by contacting the outer wall of the electrode.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The plasma cracking furnace recovers the combustible gas after combustion through a reflux pipe and guides the gas into a collection pipe. The high temperature of the cracking in the cracking furnace is used to carry out a reduction reaction with the carbon deposits in the collection pipe, thereby increasing the concentration of the combustible gas and reducing the carbon deposits in the collection pipe. At the same time, the combustible gas generated by the combustion is collected and refluxed for secondary combustion, fully utilizing the combustible gas generated in the cracking furnace and making the cracking furnace more efficient.

[0015] 2. The plasma cracking furnace stirs the solid waste in the cracking furnace through the guide mechanism, so that the solid waste inside the cracking furnace is heated in all directions. While being fully cracked, it contacts the plasma anode and conducts the plasma current to the gas recovery and combustion area to ignite the recovered combustion gas, thereby increasing the combustion efficiency of the recovered gas and fully releasing energy.

[0016] 3. The plasma cracking furnace stirs the solid waste in the cracking furnace through the stirring assembly, so that the cracking temperature of the solid waste in the cracking furnace is evenly transmitted, the solid waste is fully cracked, and the solid waste is auxiliary crushed to prevent the solid waste particles from being too large and difficult to crack, thereby increasing the cracking efficiency of the cracking furnace for the solid waste.

[0017] 4. The plasma cracking furnace filters the collected combustible gas through the reduction chamber to prevent the gas produced by plasma cracking from carrying a large amount of solid impurities, which affects the combustion efficiency of the recovered gas. At the same time, combustion-supporting gas is introduced to mix with the recovered combustible gas to ensure that the recovered combustible gas is fully burned. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 The cross-sectional view of the present invention Figure 1 ; Figure 3 The cross-sectional view of the present invention Figure 2 ; Figure 4 The cross-sectional view of the present invention Figure 3 ; Figure 5 The cross-sectional view of the present invention Figure 4 ; Figure 6 Schematic diagram of the structure of the flow guide mechanism of the present invention; Figure 7 It is a structural schematic diagram of the stirring assembly of the present invention; Figure 8 It is a cross-sectional view of the stirring assembly of the present invention.

[0019] In the figure: 1. Shell; 101. Water outlet pipe; 102. Reduction chamber; 103. Air inlet; 104. Collecting pipe; 105. Electrode; 106. Connecting pipe 1; 107. Water inlet pipe; 108. Buffer chamber; 109. Isolation chamber; 110. Return pipe; 111. Partition; 112. Connecting pipe 2; 113. Connecting pipe 3; 2. Flow guide mechanism; 201. Support rod 1; 202. Connecting plate; 203. Fan; 204. Centrifugal block; 3. Stirring assembly; 301. Sliding sleeve; 302. Support rod 2; 303. Extrusion block; 304. Stirring block; 305. Elastic plate; 306. Positioning groove; 307. Support wheel. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] For example 1, please refer to Figure 1-Figure 5 The present invention provides a technical solution: a plasma cracking furnace, comprising a shell 1, an inner wall of the shell 1 fixedly connected to a water outlet pipe 101, a bottom of the shell 1 fixedly connected to a water inlet pipe 107, an outer wall of the shell 1 fixedly connected to a reduction chamber 102, a top of the reduction chamber 102 fixedly connected to a collection pipe 104, a bottom of the reduction chamber 102 fixedly connected to a connecting pipe 106, a top of the reduction chamber 102 fixedly connected to an air inlet 103, an inner wall of the shell 1 fixedly connected to an isolation chamber 109, and an inner wall of the shell 1 plugged with an electrode 105, further comprising: The buffer bin 108 is arranged inside the shell 1, the bottom of the buffer bin 108 is fixedly connected with a return pipe 110, the top of the buffer bin 108 is fixedly connected with a connecting pipe 2 112, the inner wall of the collecting pipe 104 is fixedly connected with a connecting pipe 3 113, the inner wall of the isolation bin 109 is fixedly connected with a partition 111, and the isolation bin 109 is provided with a guide mechanism 2. Activated carbon is added to the reduction bin 102 for adsorbing and filtering the collected gas, and reacting with the gas generated after combustion at high temperature. The collecting pipe 104 is used to guide the gas generated by the cracking of the solid waste, and the partition 111 is used to separate the solid waste and the combustible gas. Isolation, the air inlet 103 is used to supplement the combustion-supporting gas. When the plasma cracking furnace is put into use, the solid waste is placed in the isolation chamber 109, and the cooling water is injected from the water inlet pipe 107 and flows out from the water outlet pipe 101 to thermally isolate the isolation chamber 109 from the shell 1. The electrode 105 is energized, and the solid waste in the isolation chamber 109 is plasma cracked by the electrode 105. During the cracking process, the combustible gas generated by the melting of the solid waste enters the collection chamber, is guided by the collection pipe 104, and is introduced into the reduction chamber 102. The impurities in the collected combustible gas are filtered through the activated carbon in the reduction chamber 102. The combustible gas after combustion is introduced into the isolation chamber 109 through the connecting pipe 106, and contacts the anode through the guide mechanism 2, and introduces the plasma current into the bottom of the partition 111 to ignite the combustible gas output from the connecting pipe 106, heat the partition 111, and assist in cracking the solid waste. As the temperature inside the isolation chamber 109 rises, the combustible gas output efficiency increases, driving the guide mechanism 2 to rotate in the isolation chamber 109, stirring the solid waste in the isolation chamber 109, and crushing the solid waste. The burned gas is collected through the reflux pipe 110, and after being cooled by cooling water, it enters the buffer chamber 108 and passes through the connecting pipe. The second 112 and the one-way valve enter the connecting pipe 3 113, allowing the gas to enter the collecting pipe 104 through the connecting pipe 3 113. The high temperature generated by the cracking furnace is used to reduce the carbon deposits attached to the collecting pipe 104 to generate combustible gas, which is then burned and utilized. The burned gas that does not participate in the reaction enters the reduction chamber 102 and is reduced by the activated carbon in the reduction chamber 102 to generate combustible gas, which is continuously utilized to increase the cracking efficiency of the cracking furnace. Until the solid waste cracking is completed, the electrode 105 is powered off, and after the temperature of the isolation chamber 109 drops, the interior of the isolation chamber 109 is cleaned before the next cracking operation is carried out. One end of the collecting pipe 104 is away from the reduction chamber 102 and is fixedly connected to the inner wall of the shell 1. One end of the connecting pipe 106 is away from the reduction chamber 102 and passes through the outer wall of the shell 1 and is fixedly connected to the isolation chamber 109. One end of the reflux pipe 110 is away from the buffer chamber 108 and is fixedly connected to the inside of the isolation chamber 109. The connecting pipe 106 is used to reflux and burn the gas generated by the cracking of the solid waste. During the cracking process, the combustible gas generated by the melting of the solid waste enters the collection chamber and is guided by the collecting pipe 104 to introduce the combustible gas into the reduction chamber 102. The activated carbon in the reduction chamber 102 filters the impurities in the collected combustible gas. The filtered combustible gas is introduced into the isolation chamber 109 through the connecting pipe 106, contacts the anode through the guide mechanism 2, and introduces the plasma current into the bottom of the partition 111 to ignite the combustible gas output by the connecting pipe 106. The position of the second connecting pipe 112 and the position of the third connecting pipe 113 are on the same axis. The outer wall of the buffer bin 108 is fixedly connected to the inner wall of the shell 1. The gap between the second connecting pipe 112 and the third connecting pipe 113 is connected by a one-way valve, so that the gas enters the third connecting pipe 113 from the second connecting pipe 112 through the one-way valve. The combusted gas is collected by the return pipe 110 and cooled by cooling water before entering the buffer bin 108. It then enters the third connecting pipe 113 through the second connecting pipe 112 and the one-way valve, and then enters the collection pipe 104 through the third connecting pipe 113. There are three groups of collecting pipes 104 and connecting pipe 1 106. The three groups of collecting pipes 104 and connecting pipe 1 106 are equidistantly arranged on the outer wall of the reduction bin 102 with the center line of the shell 1 as the rotation axis. There are three groups of return pipes 110. The three groups of return pipes 110 are equidistantly arranged at the bottom of the buffer bin 108 with the center line of the isolation bin 109 as the rotation axis. The return pipe 110 is used to guide the post-combustion gas. The post-combustion gas is guided through the return pipe 110 and enters the buffer bin 108, and enters the connecting pipe 3 113 through the connecting pipe 2 112 and the one-way valve, so that the gas enters the collecting pipe 104 through the connecting pipe 3 113, and uses the high temperature generated by the cracking furnace to carry out a reduction reaction with the carbon deposits attached to the collecting pipe 104 to generate combustible gas, which continues to be burned and utilized.

[0022] Example 2, based on Example 1, please refer to Figure 6, the present invention provides a technical solution: the guide mechanism 2 includes a support rod 201, the bottom of the support rod 201 is fixedly connected to a connecting plate 202, the bottom of the connecting plate 202 is fixedly connected to the inner wall of the fan 203 through a rotating shaft penetrating the partition 111, the outer wall of the fan 203 is fixedly connected to a centrifugal block 204, the outer wall of the support rod 201 is provided with a stirring assembly 3, the fan 203 is used to stir the gas inside the isolation chamber 109, and the centrifugal block 204 is used to increase the centrifugal force of the fan 203. During the cracking process, the recovered combustible gas enters the bottom of the partition 111 through the connecting pipe 106. As the temperature in the isolation chamber 109 rises, the solid waste melts and the combustible gas The flow rate increases, driving the fan 203 to rotate, and driving the support rod 201 to rotate in the isolation cabin through the connecting plate 202, stirring the solid waste, and at the same time driving the stirring assembly 3 to rotate in the isolation chamber 109. The stirring assembly 3 contacts the anode, and the plasma current is guided to the centrifugal block 204 through the support rod 201, igniting the combustible gas, heating the partition 111, and accelerating the cracking reaction. At the same time, the flow rate of the combustible gas continues to increase, and the centrifugal block 204 increases the rotation counterweight of the fan 203, increases the stirring force of the stirring assembly 3 in the isolation chamber 109, and makes the fan 203 fully stir the combustible gas, thereby improving the efficiency of the cracking reaction; There are two groups of support rods 201. The two groups of support rods 201 are symmetrically arranged on the top of the connecting plate 202 with the center line of the connecting plate 202 as the symmetry axis. The bottom of the connecting plate 202 is rotatably connected to the surface of the partition 111 through a bearing. The support rods 201 are used to stir the solid waste. The centrifugal block 204 is used to conduct plasma current to ignite the combustible gas at the bottom of the partition 111. The recovered combustible gas enters the bottom of the partition 111 through the connecting pipe 106. As the temperature in the isolation chamber 109 rises, the solid waste melts, and the flow rate of the combustible gas increases, driving the fan 203 to rotate, and driving the support rods 201 to rotate in the isolation chamber through the connecting plate 202 to stir the solid waste.

[0023] Example 3, based on Example 1 and Example 2, please refer to Figure 7-Figure 8The present invention provides a technical solution: the stirring assembly 3 includes a sliding sleeve 301, the outer wall of the sliding sleeve 301 is fixedly connected to the support rod 2 302, the outer wall of the support rod 2 302 is rotatably connected to the extrusion block 303, the outer wall of the extrusion block 303 is slidably connected to the stirring block 304, the outer wall of the stirring block 304 is provided with a positioning groove 306, the inner wall of the stirring block 304 is rotatably connected to the support wheel 307 through the rotating shaft, the outer wall of the stirring block 304 is fixedly connected to the elastic plate 305, and the other end of the elastic plate 305 is fixedly connected to the outer wall of the extrusion block 303, the stirring block 304 is used to stir the solid waste, and the extrusion block 303 is used to squeeze the solid waste into pieces. When the connecting plate 202 drives the support rod 1 201 to rotate in the isolation chamber 109, the stirring block 304 contacts the solid waste, driving the extrusion block 303 to rotate on the outer wall of the support rod 2 302, so that the stirring block 304 stirs the solid waste. When the support wheel 307 contacts the inner wall of the isolation chamber 109, the extrusion block 303 is supported by the hydraulic damping, so that the stirring block 304 squeezes the elastic plate 305 to slide on the outer wall of the extrusion block 303, so that the extrusion block 303 is inserted into the positioning groove 306 to crush the solid waste. After the crushing is completed, the stirring block 304 is guided by the guide wheel to drive the extrusion block 303 to compress the hydraulic damping and slide on the outer wall of the support rod 2 302 to prevent the stirring block 304 from colliding with the inner wall of the isolation chamber 109. At the same time, the outer wall of the extrusion block 303 contacts the outer wall of the electrode 105, and the plasma current is guided to the centrifugal block 204 through the anode to ignite the combustible gas. The electrode 105 contacts the outer wall of the extrusion block 303, driving the sliding sleeve 301 to rotate on the outer wall of the support rod 1 201, stirring the solid waste in the isolation chamber 109, and preventing the electrode 105 from interfering with the extrusion block 303; The outer wall of the support wheel 307 rolls along the inner wall of the isolation chamber 109, and the extrusion block 303 slides along the outer wall of the support rod 2 302. The inner wall of the extrusion block 303 supports the support rod 2 302 through hydraulic damping. The outer wall of the extrusion block 303 contacts the outer wall of the electrode 105 to conduct the plasma current. When the support wheel 307 contacts the inner wall of the isolation chamber 109, the extrusion block 303 is supported by the hydraulic damping, so that the stirring block 304 squeezes the elastic plate 305 to slide on the outer wall of the extrusion block 303, so that the extrusion block 303 is inserted into the positioning groove 306 to crush the solid waste. After the crushing is completed, the stirring block 304 is guided by the guide wheel, driving the extrusion block 303 to compress the hydraulic damping and slide on the outer wall of the support rod 2 302 to prevent the stirring block 304 from colliding with the inner wall of the isolation chamber 109. At the same time, the outer wall of the extrusion block 303 contacts the outer wall of the electrode 105, and the plasma current is guided to the centrifugal block 204 through the anode to ignite the combustible gas.

[0024] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A plasma cracking furnace, comprising a shell (1), wherein the inner wall of the shell (1) is fixedly connected to a water outlet pipe (101), the bottom of the shell (1) is fixedly connected to a water inlet pipe (107), the outer wall of the shell (1) is fixedly connected to a reduction chamber (102), the top of the reduction chamber (102) is fixedly connected to a collecting pipe (104), the bottom of the reduction chamber (102) is fixedly connected to a connecting pipe (106), the top of the reduction chamber (102) is fixedly connected to an air inlet (103), the inner wall of the shell (1) is fixedly connected to an isolation chamber (109), and the inner wall of the shell (1) is plugged with an electrode (105), characterized in that: Also includes: A buffer bin (108) is provided inside the shell (1); the bottom of the buffer bin (108) is fixedly connected to a return pipe (110); the top of the buffer bin (108) is fixedly connected to a second connecting pipe (112); the inner wall of the collecting pipe (104) is fixedly connected to a third connecting pipe (113); the inner wall of the isolation bin (109) is fixedly connected to a partition (111); a guide mechanism (2) is provided inside the isolation bin (109); activated carbon is added inside the reduction bin (102) for adsorbing and filtering the collected gas and reacting with the gas generated after combustion at high temperature; the collecting pipe (104) is used to guide the gas generated by the cracking of the solid waste; the partition (111) is used to isolate the solid waste from the combustible gas; and the air inlet (103) is used to supplement the combustion-supporting gas.

2. The plasma cracking furnace according to claim 1, characterized in that: The end of the collecting pipe (104) away from the reduction chamber (102) is fixedly connected to the inner wall of the shell (1); the end of the connecting pipe (106) away from the reduction chamber (102) passes through the outer wall of the shell (1) and is fixedly connected to the isolation chamber (109); the end of the reflux pipe (110) away from the buffer chamber (108) is fixedly connected to the inside of the isolation chamber (109); the connecting pipe (106) is used to reflux and burn the gas generated by the cracking of the solid waste.

3. The plasma cracking furnace according to claim 1, characterized in that: The guide mechanism (2) comprises a support rod (201), the bottom of the support rod (201) is fixedly connected to a connecting plate (202), the bottom of the connecting plate (202) is fixedly connected to the inner wall of the fan (203) via a rotating shaft penetrating the partition (111), the outer wall of the fan (203) is fixedly connected to a centrifugal block (204), the outer wall of the support rod (201) is provided with a stirring assembly (3), the fan (203) is used to stir the gas inside the isolation chamber (109), and the centrifugal block (204) is used to increase the centrifugal force of the fan (203).

4. The plasma cracking furnace according to claim 3, characterized in that: The stirring assembly (3) comprises a sliding sleeve (301), the outer wall of the sliding sleeve (301) is fixedly connected to a second support rod (302), the outer wall of the second support rod (302) is rotatably connected to an extrusion block (303), the outer wall of the extrusion block (303) is slidably connected to a stirring block (304), the outer wall of the stirring block (304) is provided with a positioning groove (306), the inner wall of the stirring block (304) is rotatably connected to a support wheel (307) via a rotating shaft, the outer wall of the stirring block (304) is fixedly connected to an elastic plate (305), the other end of the elastic plate (305) is fixedly connected to the outer wall of the extrusion block (303), the stirring block (304) is used to stir solid waste, and the extrusion block (303) is used to squeeze and crush solid waste.

5. The plasma cracking furnace according to claim 1, characterized in that: The position of the connecting pipe 2 (112) and the position of the connecting pipe 3 (113) are on the same axis, the outer wall of the buffer bin (108) is fixedly connected to the inner wall of the shell (1), and the gap between the connecting pipe 2 (112) and the connecting pipe 3 (113) is connected by a one-way valve, so that the gas enters the connecting pipe 3 (113) from the connecting pipe 2 (112) through the one-way valve.

6. The plasma cracking furnace according to claim 2, characterized in that: The number of the collecting pipes (104) and the connecting pipe (106) is three groups, and the three groups of the collecting pipes (104) and the connecting pipe (106) are equidistantly arranged on the outer wall of the reduction chamber (102) with the center line of the shell (1) as the rotation axis. The number of the return pipes (110) is three groups, and the three groups of the return pipes (110) are equidistantly arranged on the bottom of the buffer chamber (108) with the center line of the isolation chamber (109) as the rotation axis. The return pipes (110) are used to guide the post-combustion gas.

7. The plasma cracking furnace according to claim 3, characterized in that: The support rods (201) are provided in two groups. The two groups of support rods (201) are symmetrically arranged on the top of the connecting plate (202) with the center line of the connecting plate (202) as the symmetry axis. The bottom of the connecting plate (202) is rotatably connected to the surface of the partition (111) through a bearing. The support rods (201) are used to stir the solid waste. The centrifugal block (204) is used to conduct plasma current and ignite the combustible gas at the bottom of the partition (111).

8. The plasma cracking furnace according to claim 4, characterized in that: The outer wall of the support wheel (307) rolls along the inner wall of the isolation chamber (109), and the extrusion block (303) slides along the outer wall of the second support rod (302). The inner wall of the extrusion block (303) supports the second support rod (302) through hydraulic damping, and the outer wall of the extrusion block (303) conducts the plasma current by contacting the outer wall of the electrode (105).

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