Ash discharge mechanism of plasma gasification furnace

Abstract

The application discloses a kind of ash discharging mechanism of plasma gasification furnace, including drive located outside furnace body and grate, slag ring support plate, circular gear ring, transmission gear and transmission bearing located in furnace body.The circular ring support frame is fixed below the grate, the inner ring of transmission bearing is assembled in the circular ring support frame, the outer ring of transmission bearing is assembled in furnace body, the axial line of transmission bearing is eccentric with the up-down center line of grate;The slag ring support plate is fixedly sheathed in the circular ring support frame, and the center line coincides with the axial line of transmission bearing;Circular gear ring is sheathed in the circular ring support frame and is fixedly connected with slag ring support plate, transmission gear is engaged with circular gear ring;Drive drives grate to do eccentric rotation around the axial line of transmission bearing by transmission gear and circular gear ring, so that slag falls downward under the eccentric rotation of grate;To improve the smoothness and reliability of slag discharge in furnace body.

Description

Technical Field

[0001] This invention relates to the field of hazardous waste treatment, and more particularly to an ash discharge mechanism for a plasma gasification furnace. Background Technology

[0002] As is well known, plasma gasification furnaces are commonly used equipment for the harmless treatment of solid waste, especially hazardous solid waste. They can achieve the effect of low emissions and less landfill, and are increasingly favored by hazardous waste treatment companies.

[0003] In existing plasma gasifiers, because there is no relative movement between the grate and the slag ring support plate, the slag formed after the waste material at the grate is gasified first falls onto the slag ring support plate. The slag ring support plate accumulates the slag to a certain extent, allowing it to flow into the gap between the slag ring support plate and the grate and be discharged downwards through this gap. Furthermore, in existing plasma gasifiers, a single-stage air distribution system is used for each layer of the grate. During production, the air volume in one layer often becomes too high or too low. This leads to uneven furnace distribution and results in low gasification efficiency, uneven grate cooling, and high slag discharge temperature.

[0004] Therefore, there is an urgent need for an ash removal mechanism for a plasma gasification furnace to overcome one or more of the above-mentioned defects. Summary of the Invention

[0005] The purpose of this invention is to provide an ash removal mechanism for a plasma gasification furnace to improve the smoothness and reliability of slag discharge from the furnace body.

[0006] To achieve the above objectives, the ash removal mechanism of the plasma gasification furnace of the present invention is located at the furnace body, including a driver located outside the furnace body and grates, slag ring support plates, circular gear rings, transmission gears and transmission bearings located inside the furnace body. A circular support frame is fixed directly below the grate. The inner ring of the transmission bearing is mounted on the circular support frame, and the outer ring of the transmission bearing is mounted on the furnace body. The axis of the transmission bearing is eccentrically arranged with respect to the upper and lower center lines of the grate. A slag circular support plate is located above the transmission bearing and is fixedly fitted onto the circular support frame. The center line of the slag circular support plate coincides with the axis of the transmission bearing, and the slag circular support plate also protrudes radially from the grate. A circular gear ring is fitted onto the circular support frame and fixedly connected to the slag circular support plate. The transmission gear meshes with the circular gear ring. The driver is configured to drive the transmission gear to rotate. The rotating transmission gear drives the grate to rotate eccentrically around the axis of the transmission bearing through the circular gear ring, thereby causing the slag on the slag circular support plate to fall downwards from the gap between the slag circular support plate and the circular support frame under the eccentric rotation of the grate.

[0007] Compared with existing technologies, this method utilizes the eccentric arrangement of the upper and lower center lines of the grate and the axis of the transmission bearing, along with the cooperation of the driver, circular gear ring, transmission bearing, and transmission gear. The driver drives the grate to rotate eccentrically around the axis of the transmission bearing via the transmission gear and circular gear ring. This causes the slag on the slag ring support plate to automatically fall downwards from the gap between the slag ring support plate and the ring support frame under the eccentric rotation of the grate, thus ensuring smooth and reliable slag discharge from the furnace body.

[0008] Preferably, the ash removal mechanism of the plasma gasification furnace of the present invention further includes an air distribution chamber located inside the furnace body and arranged directly below the grate. The air distribution chamber has a liquid holding cavity, an outer air distribution duct, an intermediate air distribution duct, and an inner air distribution duct. The grate includes a furnace tower located directly above the air distribution chamber and an outer sleeve, an intermediate sleeve, and an inner sleeve located between the furnace tower and the air distribution chamber. The outer sleeve, intermediate sleeve, and inner sleeve each extend downward into the liquid held in the liquid holding cavity. The furnace tower includes three or more tower layers arranged in a gradually decreasing direction from bottom to top. Each tower layer has a bottom opening at the middle position of its bottom. The outer sleeve is fitted and connected to the bottom of the lowest tower layer so that the internal space of the outer sleeve is connected to the internal space of the tower layer in which the outer sleeve is located. The intermediate sleeves are spaced apart. The outer sleeve is fitted inside the outer sleeve, and the middle sleeve extends upward from the outer sleeve and is assembled and connected to a layer of the tower located above the outer sleeve. The inner sleeve is fitted inside the middle sleeve separately, and the inner sleeve extends upward from the middle sleeve and is assembled and connected to a layer of the tower located above the middle sleeve. The outer air distribution duct, the middle air distribution duct, and the inner air distribution duct are each sealed and fixedly inserted into the bottom cavity wall of the liquid holding cavity. The outer air distribution duct extends upward from the liquid contained in the liquid holding cavity and is placed in the gap between the outer sleeve and the middle sleeve. The middle air distribution duct extends upward from the liquid contained in the liquid holding cavity and is placed in the gap between the middle sleeve and the inner sleeve. The inner air distribution duct extends upward from the liquid contained in the liquid holding cavity and is placed in the inner sleeve.

[0009] Preferably, the outer contour of the bottommost tower layer is a circular contour, and the center line of the circular contour coincides with the axis of the transmission bearing.

[0010] Preferably, the ash removal mechanism of the plasma gasifier of the present invention further includes a slag covering ring that is fitted onto the outer sleeve and fixedly connected to the outer sleeve. The slag covering ring extends downward at an angle away from the outer sleeve and protrudes from the air distribution chamber.

[0011] Preferably, the ash removal mechanism of the plasma gasification furnace of the present invention further includes a circular support frame located inside the furnace body. The circular support frame is sleeved on the air distribution chamber. The outer side wall of the circular support frame is provided with a plurality of lugs arranged at intervals around the outer side wall. The lugs face the furnace body and are fixedly connected to the furnace body. The outer ring of the transmission bearing is assembled on the circular support frame.

[0012] Preferably, the furnace body is provided with a number of support seats that are the same as the number of the lugs and located directly below the lugs. The support seats support the lugs from below and are fixedly connected to the lugs.

[0013] Preferably, the tower layer where the outer sleeve is located is separated from the tower layer where the intermediate sleeve is located by one tower layer.

[0014] Preferably, the air distribution chamber further comprises an inner air inlet channel, a middle air inlet channel, and an outer air inlet channel that are separated from each other and not interconnected. The inner air inlet channel is connected to the inner air distribution duct, the middle air inlet channel is connected to the middle air distribution duct, and the outer air inlet channel is connected to the outer air distribution duct.

[0015] Preferably, there are two actuators arranged on opposite sides of the furnace body, and each actuator corresponds to one transmission gear.

[0016] Preferably, the driver is a speed reducer, and the transmission gear is mounted on the output end of the speed reducer. Attached Figure Description

[0017] Figure 1 This is an internal view of the ash removal mechanism of the plasma gasification furnace of the present invention, located in the furnace body.

[0018] Figure 2 yes Figure 1 The diagram shows the internal structure of the ash discharge mechanism.

[0019] Figure 3 yes Figure 2 The diagram shows a three-dimensional view of the ash discharge mechanism.

[0020] Figure 4 yes Figure 2 An internal diagram of the grate in the furnace.

[0021] Figure 5 yes Figure 2 An internal diagram of the air distribution chamber. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1 and Figure 2 The ash removal mechanism 100 of the plasma gasification furnace of the present invention is located at the furnace body 210, as shown in the figure. Figure 1As shown. The ash removal mechanism 100 of the present invention includes a driver 10 located outside the furnace body 210, and grates 20, slag ring support plates 30, circular gear rings 40, transmission gears 50, and transmission bearings 60 located within the furnace body 210. A ring support frame 71 is fixed directly below the grate 20, allowing the ring support frame 71 to be fixed together with the grate 20 and rotate together. The inner ring 61 of the transmission bearing 60 is assembled to the ring support frame 71, so that the inner ring 61 and the ring support frame 71 are assembled together. The outer ring 62 of the transmission bearing 60 is assembled to the furnace body 210, providing support to the outer ring 62. The axis 63 of the transmission bearing 60 is eccentrically arranged with respect to the upper and lower center lines 21 of the grate 20, to meet the requirement of eccentric rotational motion of the grate 20 during rotation around the axis 63. This ensures that the gap between the circumferential profile of the grate 20 and the furnace body 210 is along the axis 60. The arrangement varies circumferentially; the slag ring support plate 30 is located above the transmission bearing 60 and is fixedly sleeved on the ring support frame 71, so that the slag ring support plate 30 and the ring support frame 71 are fixed together and can rotate with the grate 20. The center line of the slag ring support plate 30 coincides with the axis 63 of the transmission bearing 60. The slag ring support plate 30 also protrudes radially from the grate 20 to meet the requirement that slag falls onto the slag ring support plate 30; the circular gear ring 40 is sleeved on the ring support frame 71 and fixedly connected to the slag ring support plate 30, so that the circular gear ring 40 and the ring support frame 71 are fixed together and can rotate with the grate 20. Optionally, in Figure 1 , Figure 2 and Figure 4 In this example, the circular gear ring 40 is located directly below the slag ring support plate 30, with its teeth facing downwards. This design avoids the circular gear ring 40 being affected by slag due to its location directly above the slag ring support plate 30, and also prevents the teeth of the circular gear ring 40 from facing the furnace body 210. When the teeth of the circular gear ring 40 face the furnace body 210, the transmission gear 50 needs to mesh with the circular gear ring 40, which would increase the radial dimension of the furnace body 210. This results in a large volume; the transmission gear 50 meshes with the circular gear ring 40; the driver 10 is configured to drive the transmission gear 50 to rotate, and the rotating transmission gear 50 drives the grate 20 to rotate eccentrically around the axis 63 of the transmission bearing 60 through the circular gear ring 40, thereby causing the slag 211 on the slag ring support plate 30 to fall downward from the gap 72 between the slag ring support plate 30 and the ring support frame 71 under the eccentric rotation of the grate 20; the ash discharge path of the slag 211 is visible. Figure 1 The spline curve referred to by reference numeral 93 is represented by a centerline. Specifically, in Figure 3As an example, the annular support frame 71 has multiple side passages 711 arranged circumferentially spaced on its side wall. These side passages 711 allow some of the slag 211 entering the gap 72 to fall downwards, thus increasing the ash discharge path for the slag 211 and improving ash discharge efficiency. More specifically, as follows:

[0024] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the ash removal mechanism 100 of the present invention also includes an air distribution chamber 80 located inside the furnace body 210 and arranged directly below the grate 20. The air distribution chamber 80 has a liquid holding chamber 81, an outer air distribution pipe 82, an intermediate air distribution pipe 83, and an inner air distribution pipe 84. The grate 20 includes a furnace tower 20a located directly above the air distribution chamber 80 and an outer sleeve 20b, an intermediate sleeve 20c, and an inner sleeve 20d located between the furnace tower 20a and the air distribution chamber 80. The outer sleeve 20b, the intermediate sleeve 20c, and the inner sleeve 20d each extend downward into the liquid 811 contained in the liquid holding chamber 81. The furnace tower 20a includes six layers 22 arranged in a gradually decreasing direction from bottom to top along the furnace tower 20a (see arrow A), so that the entire furnace tower 20a is arranged in a conical shape, for example, but not limited to, [other configurations]. Figure 3 The cone shape shown is designed to better guide solid waste and slag downwards; a bottom opening 221 is provided in the middle of the bottom 22a of each tower layer 22. Optionally, as an example, the bottom opening 221 is a circular opening to facilitate the manufacturing and processing of the bottom 22a of the tower layer 22. Of course, the shape of the bottom opening 221 can be other than that, depending on actual needs.

[0025] Meanwhile, the outer sleeve 20b is assembled and connected to the bottom 22a of the lowest (i.e., the sixth) tower layer 22, so that the internal space of the outer sleeve 20b is connected to the internal space 22b of the tower layer 22 where the outer sleeve 20b is located; the intermediate sleeve 20c is spaced and fitted inside the outer sleeve 20b, and the intermediate sleeve 20c also extends upward from the outer sleeve 20b and is assembled and connected to a tower layer 22 located above the outer sleeve 20b, for example, it is assembled and connected to the fourth tower layer 22; the inner sleeve 20d is spaced and fitted inside the intermediate sleeve 20c, and the inner sleeve 20d also extends upward from the intermediate sleeve 20c and is assembled and connected to a tower layer 22 located above the intermediate sleeve 20c, for example, it is assembled and connected to the third tower layer 22.

[0026] Furthermore, the external air duct 82, the intermediate air duct 83, and the internal air duct 84 are each sealed and fixedly inserted into the bottom cavity wall 812 of the liquid holding cavity 81. Specifically, the external air duct 82 is inserted into the bottom cavity wall 812 of the liquid holding cavity 81, and is also fixed to the bottom cavity wall 812; the fit between the external air duct 82 and the bottom cavity wall 812 is also sealed. The intermediate air duct 83 is inserted into the bottom cavity wall 812 of the liquid holding cavity 81, and is also fixed to the bottom cavity wall 812; the fit between the intermediate air duct 83 and the bottom cavity wall 812 is also sealed. The internal air duct 84 is inserted into the bottom cavity wall 812 of the liquid holding cavity 81. In the bottom cavity wall 812 of cavity 81, the inner air duct 84 is fixed to the bottom cavity wall 812, and the fit between the inner air duct 84 and the bottom cavity wall 812 is sealed. Additionally, the outer air duct 82 extends upwards through the liquid 811 contained in the liquid container cavity 81 and is placed in the gap 20e between the outer sleeve 20b and the intermediate sleeve 20c; the intermediate air duct 83 extends upwards through the liquid 811 contained in the liquid container cavity 81 and is placed in the gap 20f between the intermediate sleeve 20c and the inner sleeve 20d; and the inner air duct 84 extends upwards through the liquid 811 contained in the liquid container cavity 81 and is placed in the inner sleeve 20d. (See attached diagram). Figure 2 As shown. Therefore, when gas is introduced into the external air distribution duct 82, the gas enters the gap 20e and is then discharged from the air outlet 222 of the fourth to sixth tower layers 22; when gas is introduced into the internal air distribution duct 84, the gas enters the inner sleeve 20d and is then discharged from the air outlet 222 of the first and second tower layers 22; when gas is introduced into the intermediate air distribution duct 83, the gas enters the gap 20f and is then discharged from the air outlet 222 of the third tower layer 22.

[0027] In this system, the outer sleeve 20b, inner sleeve 20d, intermediate sleeve 20c, liquid storage chamber 81, external air distribution duct 82, intermediate air distribution duct 83, and inner air distribution duct 84 work together to create a liquid seal between the lower ends of the outer sleeve 20b, inner sleeve 20d, and intermediate sleeve 20c by the liquid 811 in the liquid storage chamber 81. This ensures that the gas introduced through the external air distribution duct 82 enters the gap 20e between the outer sleeve 20b and the intermediate sleeve 20c, thereby controlling other tower layers 22 located below the tower layer 22 where the intermediate sleeve 20c is located (e.g., Figure 2The airflow of the fourth to sixth layers (22) in the furnace tower 20a is controlled by the gas introduced through the intermediate air distribution duct 83 into the gap 20f between the intermediate sleeve 20c and the inner sleeve 20d. The gas introduced through the inner air distribution duct 84 enters the inner sleeve 20d to control the airflow of the layers 22 above it. In this way, the airflow of the corresponding layers 22 in the furnace tower 20a can be adjusted and controlled independently, realizing multi-stage air distribution. This ensures that the airflow of each layer 22 in the furnace tower 20a is evenly distributed, which improves gasification efficiency and ensures uniform cooling of the furnace tower 20a and reduces emissions. Slag temperature; In addition, by utilizing the design of "furnace tower 20a comprising three or more layers of tower 22 arranged in a gradually decreasing direction from bottom to top along furnace tower 20a", it is convenient to guide solid waste and gasified slag downwards on the one hand, and increase the contact area between furnace tower 20a and solid waste on the other hand, thus making it more conducive to gasification treatment; by using the liquid 811 in the liquid container 81 to liquid seal the lower ends of the outer sleeve 20b, inner sleeve 20d and intermediate sleeve 20c, the furnace tower 20a can also be further cooled and de-temperatured through the outer sleeve 20b, inner sleeve 20d and intermediate sleeve 20c. It should be noted that, since there are six layers of tower 22 in the attached diagram, when one outer sleeve 20b and one inner sleeve 20d are each configured, in order to meet the requirement that one sleeve corresponds to two layers of tower 22, the intermediate sleeve 20c is designed as one. That is, the number of layers of tower 22 is twice the number of sleeves, in order to reduce the number of sleeves used and also to make the bottom opening 221 of the tower 22 where the sleeve is located smaller than the bottom opening 221 of the tower 22 below that does not have a sleeve. Of course, according to actual needs, the number of layers of tower 22 can also be arranged in the same way as the number of sleeves to meet the requirement that one sleeve controls one layer of tower 22. Therefore, the intermediate sleeve 20c is designed to include the first to the Nth intermediate sleeves according to the number of layers of tower 22, so as to meet the requirement that the number of layers of tower 22 is equal to the number of sleeves or a multiple of the number of sleeves. Here, the sleeve is the sum of the number of outer sleeve 20b, intermediate sleeve 20c and inner sleeve 20d.

[0028] like Figure 4 As shown, there is one tower layer 22 between the tower layer 22 where the outer casing 20b is located and the tower layer 22 where the intermediate casing 20c is located, so that the air distribution of the three tower layers 22 can be controlled by the outer casing 20b. Additionally, as... Figure 5 As shown, the air distribution chamber 80 also has separate and non-communicating internal air inlet channels 85, intermediate air inlet channels 86, and external air inlet channels 87. The internal air inlet channel 85 is connected to the internal air distribution duct 84, the intermediate air inlet channel 86 is connected to the intermediate air distribution duct 83, and the external air inlet channel 87 is connected to the external air distribution duct 82; this facilitates assembly and connection with a corresponding number of external fans. Furthermore, as... Figure 1 , Figure 2 and Figure 4 As shown, the ash discharge mechanism 100 of the present invention also includes a slag covering ring 91 that is sleeved on the outer sleeve tube 20b and fixedly connected to the outer sleeve tube 20b. The slag covering ring 91 extends downward at an angle away from the outer sleeve tube 20b and protrudes out of the air distribution chamber 91. With the help of the slag covering ring 91, on the one hand, the slag 220 is prevented from falling into the air distribution chamber 80, and on the other hand, the slag 220 falling from the gap 71 is guided downward, thereby improving the smoothness of slag discharge.

[0029] like Figures 1 to 3 As shown, the ash removal mechanism 100 of the present invention also includes a circular support frame 92 located inside the furnace body 210. The circular support frame 92 is sleeved on the air distribution chamber 80. A plurality of lugs 93 are provided on the outer side wall 921 of the circular support frame 92, arranged at intervals around the outer side wall 921. The lugs 93 face the furnace body 210 and are fixedly connected to the furnace body 210. The outer ring 62 of the transmission bearing 60 is assembled on the circular support frame 92, so that the furnace body 210 provides more reliable support for the transmission bearing 60, the circular support frame 72, the slag circular support plate 30, the circular gear ring 40, and the grate 20 through the circular support frame 92. Specifically, in Figures 1 to 3 As an example, the furnace body 210 has a number of support seats 211 that are the same as the number of lugs 93 and located directly below the lugs 93. The support seats 211 support the lugs 93 from below and are fixedly connected to the lugs 93 to improve the convenience of assembly operations between the furnace body 210 and the annular support frame 92.

[0030] like Figures 1 to 3 As shown, there are two actuators 10 arranged on opposite sides of the furnace body 210. Each actuator 10 corresponds to a transmission gear 50 to increase the reliability of the actuators 10 in driving the grate 20 to rotate eccentrically around the axis 63 of the transmission bearing 60. For example, the actuator 10 is a speed reducer, and the transmission gear 50 is mounted on the output end 11 of the speed reducer, as shown in the diagram. Figure 1 As shown.

[0031] like Figure 2 As shown, the outer contour 223 of the bottommost tower layer 22 is a circular contour, and the center line of the circular contour coincides with the axis of the transmission bearing 60. This design allows the slag 220 at the slag ring support plate 30 to enter the gap 72 more reliably during the eccentric rotation of the grate 20 around the axis 63 of the transmission bearing 60. Part of the slag 220 entering the gap 72 falls directly downwards, and the other part enters the side passage 711 and falls downwards.

[0032] Compared with the prior art, by means of the eccentric arrangement of the upper and lower center lines 21 of the grate 20 and the axis 63 of the transmission bearing 60, and by means of the cooperation of the driver 10, the circular gear ring 40, the transmission bearing 60 and the transmission gear 50, the driver 10 drives the grate 20 to rotate eccentrically around the axis 63 of the transmission bearing 60 through the transmission gear 50 and the circular gear ring 40. As a result, the slag 220 on the slag ring support plate 30 automatically falls down from the gap 71 between the slag ring support plate 30 and the ring support frame 72 under the eccentric rotation of the grate 20, thus making the discharge of slag 220 in the furnace body 210 smooth and reliable.

[0033] It is worth noting that the first to sixth layers mentioned above are named in the direction from top to bottom along the furnace tower 20a, that is, the top tower layer 22 is the first layer and the bottom tower layer 22 is the sixth layer.

[0034] 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. An ash removal mechanism for a plasma gasification furnace, located in the furnace body, characterized in that, The furnace assembly includes a drive unit located outside the furnace body and various components located inside the furnace body, including a grate, a slag ring support plate, a circular gear ring, a transmission gear, and a transmission bearing. A ring support frame is fixed directly below the grate. The inner ring of the transmission bearing is fitted onto the ring support frame, and the outer ring of the transmission bearing is fitted onto the furnace body. The axis of the transmission bearing is eccentrically positioned relative to the upper and lower center lines of the grate. The slag ring support plate is located above the transmission bearing and is fixedly fitted onto the ring support frame. The center line of the slag ring support plate is aligned with the axis of the transmission bearing. The slag ring support plate also protrudes radially from the grate. The circular gear ring is sleeved on the ring support frame and fixedly connected to the slag ring support plate. The transmission gear meshes with the circular gear ring. The driver is configured to drive the transmission gear to rotate. The rotating transmission gear drives the grate to rotate eccentrically around the axis of the transmission bearing through the circular gear ring. As a result, the slag on the slag ring support plate falls downward from the gap between the slag ring support plate and the ring support frame under the eccentric rotation of the grate. The ash removal mechanism of the plasma gasification furnace further includes an air distribution chamber located inside the furnace body and directly below the grate. The air distribution chamber has a liquid storage cavity, an outer air distribution duct, a middle air distribution duct, and an inner air distribution duct. The grate includes a furnace tower located directly above the air distribution chamber and an outer sleeve, a middle sleeve, and an inner sleeve located between the furnace tower and the air distribution chamber. Each of the outer sleeve, middle sleeve, and inner sleeve extends downwards into the liquid contained in the liquid storage cavity. The furnace tower includes three or more tower layers arranged in a gradually decreasing order from bottom to top. Each tower layer has a bottom opening at the center of its bottom. The outer sleeve is fitted and connected to the bottom of the lowest tower layer, so that the internal space of the outer sleeve is connected to the internal space of the tower layer in which it is located. The middle sleeves are spaced apart and fitted onto the grate. In the outer sleeve, the intermediate sleeve extends upward from the outer sleeve and is assembled and connected to a layer of the tower located above the outer sleeve. The inner sleeve is spaced out and fitted inside the intermediate sleeve. The inner sleeve also extends upward from the intermediate sleeve and is assembled and connected to a layer of the tower located above the intermediate sleeve. The outer air distribution duct, the intermediate air distribution duct, and the inner air distribution duct are each sealed and fixedly inserted into the bottom cavity wall of the liquid holding cavity. The outer air distribution duct extends upward from the liquid contained in the liquid holding cavity and is placed in the gap between the outer sleeve and the intermediate sleeve. The intermediate air distribution duct extends upward from the liquid contained in the liquid holding cavity and is placed in the gap between the intermediate sleeve and the inner sleeve. The inner air distribution duct extends upward from the liquid contained in the liquid holding cavity and is placed in the inner sleeve. The ash removal mechanism of the plasma gasifier also includes a slag covering ring that is fitted onto the outer sleeve and fixedly connected to the outer sleeve. The slag covering ring extends downward in a direction away from the outer sleeve and protrudes out of the air distribution chamber. The ash removal mechanism of the plasma gasification furnace also includes a circular support frame located inside the furnace body. The circular support frame is sleeved on the air distribution chamber. The outer side wall of the circular support frame is provided with a plurality of lugs arranged at intervals around the outer side wall. The lugs face the furnace body and are fixedly connected to the furnace body. The outer ring of the transmission bearing is assembled on the circular support frame.

2. The ash discharge mechanism of the plasma gasification furnace according to claim 1, characterized in that, The outer contour of the bottommost tower layer is circular, and the center line of this circular contour coincides with the axis of the transmission bearing.

3. The ash discharge mechanism of the plasma gasification furnace according to claim 1, characterized in that, The furnace body is provided with a number of support seats that are the same as the number of the support ears and located directly below the support ears. The support seats support the support ears from below and are fixedly connected to the support ears.

4. The ash discharge mechanism of the plasma gasification furnace according to claim 1, characterized in that, The tower layer containing the outer sleeve is separated from the tower layer containing the intermediate sleeve by one tower layer.

5. The ash discharge mechanism of the plasma gasification furnace according to claim 1, characterized in that, The air distribution chamber also has an inner air inlet channel, a middle air inlet channel and an outer air inlet channel that are separated from each other and not connected to each other. The inner air inlet channel is connected to the inner air distribution duct, the middle air inlet channel is connected to the middle air distribution duct, and the outer air inlet channel is connected to the outer air distribution duct.

6. The ash discharge mechanism of the plasma gasification furnace according to claim 1, characterized in that, There are two drives arranged on opposite sides of the furnace body, and each drive corresponds to one transmission gear.

7. The ash discharge mechanism of the plasma gasification furnace according to claim 1, characterized in that, The driver is a speed reducer, and the transmission gear is mounted on the output end of the speed reducer.

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