Dust removal device of biomass gasifier

Abstract

The invention provides a biomass gasifier dust removal device, and relates to the technical field of dust removal devices.The biomass gasifier dust removal device comprises a furnace body, a water tank is arranged on one side of the furnace body, a vertical cylinder is fixed to the top of the water tank, an air supply pipe is connected between one side of the top of the vertical cylinder and the furnace body, three sets of transverse cylinders are installed at the top of the water tank at equal intervals, and inlet and outlet pipes are fixed to the two ends of each transverse cylinder; compared with the prior art, the vertical cylinder and the three sets of transverse cylinders are arranged on the outer side of the furnace body, the vertical cylinder is used for conducting primary spraying and dust falling on fed gas, then the gas is alternately fed into the three sets of transverse cylinders, the gas can stay for a period of time in each set of transverse cylinders, and therefore the gas can be discharged out of the furnace body. The three groups of alternately-used secondary spraying transverse barrels improve the dust removal effect on one hand, and can keep the furnace body continuously sending out the gas on the other hand, and the conveying of the gas does not need to be interrupted.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal devices, in particular to a dust removal device for a biomass gasification furnace. Background Art

[0002] When the biomass gas stove is burning, the exhaust flue gas contains a large amount of unburned and burned dust. In the prior art, the flue gas is generally discharged directly into the air, which not only pollutes the environment, but also the dust carried by the flue gas will adhere to the inner wall of the chimney when the flue gas passes through the chimney. After long-term use, the dust will clog the chimney, requiring users to clean it frequently and laboriously.

[0003] In the prior art, dust in the combustion gas is commonly removed by spraying water to reduce dust. After the dusty gas is sprayed, the dust is mixed with water, and the water is recovered and reused to remove the dust in the air. However, in this process, the dust removal efficiency is affected by the contact time between air and water. When the air passes through the spraying area quickly, the dust removal effect is not good. When the air stays for a long time, it is easy to affect the normal exhaust of the gasifier. Therefore, the prior art is not efficient in treating dust in the combustion gas. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a biomass gasification furnace dust removal device to solve the problems raised in the above-mentioned background technology. The present invention has a novel structure. A vertical cylinder and three groups of horizontal cylinders are provided on the outside of the furnace body. The vertical cylinder is used for primary spraying and dust reduction of the introduced gas, and then the gas is alternately sent into the three groups of horizontal cylinders. The gas can stay in each group of horizontal cylinders for a period of time so that the dust in the gas can be completely contacted with the spray water and then discharged. The three groups of alternating secondary spraying horizontal cylinders can improve the dust removal effect on the one hand, and on the other hand, can maintain the continuous delivery of gas from the furnace body without interrupting the gas delivery.

[0005] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical scheme: a dust removal device for a biomass gasification furnace, comprising a furnace body, a water tank is provided on one side of the furnace body, and a vertical cylinder is fixed on the top of the water tank, an air supply pipe is connected between the top side of the vertical cylinder and the furnace body, three groups of horizontal cylinders are equidistantly installed on the top of the water tank, and inlet and outlet pipes are fixed at both ends of the horizontal cylinder, the inlet and outlet pipe at one end of the horizontal cylinder is connected to the vertical cylinder, and the inlet and outlet pipe at the other end of the horizontal cylinder is connected to the exhaust pipe, a valve plate is slidably connected to the inside of the inlet and outlet pipe, a second scraper ring is slidably connected to the inside of the horizontal cylinder, and the second scraper ring Nozzles are installed equidistantly on the inner side of the top of the ring, a spray plate is fixed on the top of the vertical cylinder, and a first scraper ring is provided on the outer ring of the spray plate at the top of the vertical cylinder, and the first scraper ring slides along the inner wall of the vertical cylinder, a driving assembly is provided on the top of the water tank, and the driving assembly includes a screw, a moving block is threadedly sleeved on the surface of the screw, and a first electric push rod is fixed on the outside of the moving block, a moving layer is fixed on the top of the horizontal cylinder, and a connecting rod is slidably inserted in the moving layer, one end of the connecting rod is fixedly connected to the second scraper ring, and the first electric push rod is alternately connected to the connecting rods of the three groups of horizontal cylinders.

[0006] Furthermore, a fixing frame is fixed to the inner ring of the second scraper ring, and a bidirectional electric push rod is fixed to the center position of the fixing frame, and the bidirectional electric push rod can be in extrusion contact with the valve plates at both ends.

[0007] Furthermore, the drive assembly also includes a vertical frame, the vertical frame is fixed at the position of the screw on the top of the water tank, and the screw is rotatably installed on the vertical frame through a bearing, a motor is fixed on the top of the vertical frame, and the output end of the motor is fixedly connected to the screw.

[0008] Furthermore, a horizontal plate is fixed to one end of the connecting rod passing through the horizontal tube, and a second electric push rod is fixed on the surface of the horizontal plate. A socket is opened at the extended end of the first electric push rod, and the extended end of the second electric push rod can be inserted into the socket.

[0009] Furthermore, an annular belt is fixed on the surface of the first scraper ring, and the outer side of the belt slides along the outer wall of the vertical cylinder. A connecting frame is fixed to the outer end of the belt, and the other end of the connecting frame is fixedly connected to the top of the moving block.

[0010] Furthermore, a return pipe is provided at the bottom of the back side of the horizontal cylinder, and the return pipe is connected to the water tank. The bottom of the vertical cylinder is connected to the water tank. Solenoid valves are installed at the positions where the vertical cylinder and the return pipe are connected to the water tank.

[0011] Furthermore, a filter plate is fixed inside the water tank, and a condensation layer is fixed on one side of the back side of the water tank, and the condensation layer is connected to the water tank through a pipeline.

[0012] Furthermore, a water supply pipe is fixed on the top of the condensation layer, and a bellows is fixed at the position of each group of horizontal cylinders corresponding to the water supply pipe. The other end of the bellows penetrates into the moving layer and is connected to the nozzle of the second scraper ring.

[0013] Furthermore, springs are fixed at equal distances between the connecting ends of the inlet and outlet pipes and the horizontal cylinder, and the other end of the spring is fixedly connected to the valve plate.

[0014] Furthermore, the exhaust pipe is connected to the middle position of the inlet and outlet pipes, and an accommodating cavity for receiving the valve plate is provided on the outer side of the inlet and outlet pipes at the connection with the exhaust pipe.

[0015] Beneficial effects of the present invention: 1. In the present invention, water in the water tank is first sent to the top through a pipe and sprayed through a spray plate, and then sewage is sent to the water tank through a discharge port at the bottom, and the sewage is filtered by a filter plate of the water tank. Then, the filtered clean water is sent to the condensation layer and then sent back to the horizontal cylinder and the vertical cylinder through a water supply pipe to recycle water. The nozzle and the water supply pipe are connected by a bellows, so that when the connecting rod drives the second scraper ring to move along the inside of the horizontal cylinder, the bellows can maintain the connection between the water supply pipe and the nozzle through its own elasticity.

[0016] 2. The present invention connects the connecting frame and the moving block. Each time the screw adjusts the position of the moving block to open and close different horizontal cylinders, the belt will also rotate accordingly, thereby pulling the first scraper ring inside the vertical cylinder to slide along the inner wall of the vertical cylinder to clean the inner wall of the vertical cylinder. During this process, the moving path of the first scraper ring will not exceed the position of the horizontal cylinder currently being opened and used, thereby avoiding movement interference.

[0017] 3. The present invention drives the screw to rotate through a motor, and the moving block cooperates with the screw thread to drive the first electric push rod to move vertically. When it moves to the horizontal plate position, the extended end of the first electric push rod extends and contacts the horizontal plate. At this time, the socket of the extended end of the first electric push rod just corresponds to the second electric push rod on the horizontal plate. After the extended end of the second electric push rod is inserted into the socket, the locking connection between the horizontal plate and the first electric push rod is completed. Then, through the extension and shortening of the extended end of the first electric push rod, the horizontal rod drives the connecting rod to slide along the moving layer, pulling the second scraper ring to move along the inner wall of the horizontal cylinder. This process can act on the inlet and outlet pipes at both ends of the horizontal cylinder to close.

[0018] 4. In the present invention, when the gas remains inside the horizontal cylinder, the movement of the second scraper ring can clean the inner wall of the horizontal cylinder to prevent dust accumulation, and can change the spraying range of the nozzle on the other hand, so that the dust in the gas can contact with water more fully, and the efficiency of dust dissolving in water can be accelerated. At the same time, the driving component has another function when driving the first scraper ring to move. When the second scraper ring moves to a position close to the inlet and outlet pipes, the extended end of the two-way electric push rod located at the center of the second scraper ring pushes the valve plate in the inlet and outlet pipes outward, thereby opening the inlet and outlet pipes. The inlet and outlet pipes at one end of the vertical cylinder and the horizontal cylinder can be opened to facilitate the delivery of gas into the horizontal cylinder. After the gas stays for a period of time, the inlet and outlet pipes at one end of the exhaust pipe are opened to send the gas out through the exhaust pipe. A fan is installed inside the exhaust pipe to facilitate the discharge of gas.

[0019] 5. Compared with the prior art, the present invention is provided with a vertical cylinder and three groups of horizontal cylinders on the outside of the furnace body. The vertical cylinder is used for primary spraying and dust reduction of the introduced gas, and then the gas is alternately sent into the three groups of horizontal cylinders. The gas can stay in each group of horizontal cylinders for a period of time, so that the dust in the gas is completely in contact with the spray water and then discharged. The three groups of alternating secondary spraying horizontal cylinders can improve the dust removal effect on the one hand, and on the other hand, can maintain the continuous delivery of gas from the furnace without interrupting the gas delivery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of a dust removal device for a biomass gasification furnace of the present invention; Figure 2 It is a schematic diagram of the connection between the horizontal cylinder and the water tank of a dust removal device for a biomass gasification furnace of the present invention; Figure 3 A schematic diagram of the connection between a belt and a moving block of a dust removal device for a biomass gasification furnace of the present invention; Figure 4 It is a schematic diagram of the internal structure of the vertical cylinder, horizontal cylinder and water tank of a dust removal device for a biomass gasification furnace of the present invention; Figure 5 This is a schematic diagram of the internal structure of a horizontal cylinder of a dust removal device for a biomass gasification furnace of the present invention; Figure 6 This is a schematic diagram of the structure of a driving component of a biomass gasification furnace dust removal device of the present invention; Figure 7 This is a schematic diagram of the connection between a first electric push rod and a second electric push rod of a biomass gasification furnace dust removal device of the present invention.

[0021] In the figure: 1. furnace body; 11. air supply pipe; 2. vertical cylinder; 21. belt; 22. connecting frame; 23. spray plate; 24. first scraper ring; 3. horizontal cylinder; 31. inlet and outlet pipes; 32. second scraper ring; 33. spray head; 34. two-way electric push rod; 35. valve plate; 36. moving layer; 37. connecting rod; 38. fixed frame; 39. spring; 4. exhaust pipe; 5. drive assembly; 51. vertical frame; 52. screw; 53. moving block; 54. first electric push rod; 55. horizontal plate; 56. second electric push rod; 57. jack; 58. motor; 6. water tank; 61. condensation layer; 62. water supply pipe; 63. reflux pipe; 64. bellows; 65. filter plate. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0023] See also Figures 1 to 7 The present invention provides a technical solution: a dust removal device for a biomass gasification furnace, comprising a furnace body 1, a water tank 6 is provided on one side of the furnace body 1, and a vertical cylinder 2 is fixed on the top of the water tank 6, an air supply pipe 11 is connected between the top side of the vertical cylinder 2 and the furnace body 1, three groups of horizontal cylinders 3 are equidistantly installed on the top of the water tank 6, and inlet and outlet pipes 31 are fixed at both ends of the horizontal cylinder 3, the inlet and outlet pipe 31 at one end of the horizontal cylinder 3 is connected with the vertical cylinder 2, and the inlet and outlet pipe 31 at the other end of the horizontal cylinder 3 is connected with the exhaust pipe 4, a valve plate 35 is slidably connected inside the inlet and outlet pipe 31, a second scraper ring 32 is slidably connected inside the horizontal cylinder 3, and a nozzle 33 is equidistantly installed on the inner side of the top of the second scraper ring 32, a spray plate 23 is fixed on the top of the vertical cylinder 2, and a first scraper ring 24 is provided on the outer ring of the spray plate 23 at the top of the vertical cylinder 2, the first scraper ring 24 slides along the inner wall of the vertical cylinder 2, and a driving group is provided on the top of the water tank 6 Part 5, the driving assembly 5 includes a screw rod 52, a moving block 53 is threadedly sleeved on the surface of the screw rod 52, and a first electric push rod 54 is fixed on the outer side of the moving block 53, a moving layer 36 is fixed on the top of the horizontal cylinder 3, and a connecting rod 37 is slidably inserted in the moving layer 36, one end of the connecting rod 37 is fixedly connected to the second scraper ring 32, and the first electric push rod 54 is alternately connected to the connecting rods 37 of the three groups of horizontal cylinders 3. When the device is used, the gas generated by the combustion of the furnace body 1 is sent into the interior of the vertical cylinder 2, and then alternately transported to the interior of the three groups of horizontal cylinders 3 through the vertical cylinder 2 for retention, the spray plate 23 on the vertical cylinder 2 is used to perform primary dust reduction treatment on the gas, and the nozzle 33 in the horizontal cylinder 3 is used to perform secondary spray dust reduction treatment on the gas. After the treatment is completed, the gas is sent out from the exhaust pipe 4, and the sewage is sent to the bottom water tank 6, which is filtered and recycled for reuse, thereby improving the efficiency of dust treatment in the combustion gas.

[0024] In this embodiment, a fixing frame 38 is fixed to the inner ring of the second scraper ring 32, and a bidirectional electric push rod 34 is fixed to the center position of the fixing frame 38, and the bidirectional electric push rod 34 can be squeezed and contacted with the valve plates 35 at both ends. The driving assembly 5 also includes a vertical frame 51, and the vertical frame 51 is fixed to the position corresponding to the screw 52 on the top of the water tank 6, and the screw 52 is rotatably mounted on the vertical frame 51 through a bearing, and a motor 58 is fixed to the top of the vertical frame 51, and the output end of the motor 58 is fixedly connected to the screw 52, ​​and a horizontal plate 55 is fixed to the end of the connecting rod 37 passing through the horizontal cylinder 3, and a second electric push rod 56 is fixed to the surface of the horizontal plate 55. The first electric push rod The extended end of 54 is provided with a plug hole 57, and the extended end of the second electric push rod 56 can be inserted into the plug hole 57, the spring 39 is fixed equidistantly at the connecting end of the inlet and outlet pipe 31 and the horizontal cylinder 3, and the other end of the spring 39 is fixedly connected to the valve plate 35, the exhaust pipe 4 is connected to the middle position of the inlet and outlet pipe 31, and the inlet and outlet pipe 31 is provided with a receiving cavity for the valve plate 35 on the outer side of the connection of the exhaust pipe 4, the motor 58 drives the screw rod 52 to rotate, and the moving block 53 and the screw 52 threadedly cooperate to drive the first electric push rod 54 to move vertically. When it moves to the position of the horizontal plate 55, the extended end of the first electric push rod 54 extends and contacts with the horizontal plate 55. At this time, the first electric push rod 54 The socket 57 at the extended end just corresponds to the second electric push rod 56 on the horizontal plate 55. After the extended end of the second electric push rod 56 is inserted into the socket 57, the locking connection between the horizontal plate 55 and the first electric push rod 54 is completed. Then, through the extension and shortening of the extended end of the first electric push rod 54, the horizontal rod drives the connecting rod 37 to slide along the moving layer 36, pulling the second scraper ring 32 to move along the inner wall of the horizontal cylinder 3. This process can act on the inlet and outlet pipes 31 at both ends of the horizontal cylinder 3 to be closed. When the gas remains in the horizontal cylinder 3, the movement of the second scraper ring 32 can clean the inner wall of the horizontal cylinder 3 on the one hand to prevent dust accumulation, and on the other hand change the spraying range of the nozzle 33, so that the dust in the gas The contact with water is more complete, which speeds up the efficiency of dust dissolving in water. At the same time, the driving component 5 has another function when driving the first scraper ring 24 to move. When the second scraper ring 32 moves to a position close to the inlet and outlet pipe 31, the extended end of the two-way electric push rod 34 located at the center of the second scraper ring 32 pushes the valve plate 35 in the inlet and outlet pipe 31 outward, thereby opening the inlet and outlet pipe 31. You can choose to open the inlet and outlet pipe 31 at one end of the vertical cylinder 2 and the horizontal cylinder 3 to facilitate the delivery of gas into the horizontal cylinder 3. After the gas stays for a period of time, open the inlet and outlet pipe 31 at one end of the exhaust pipe 4 to send the gas out through the exhaust pipe 4. A fan is installed inside the exhaust pipe 4 to facilitate the discharge of gas.

[0025] In this embodiment, an annular belt 21 is fixed on the surface of the first scraper ring 24, and the outer side of the belt 21 slides along the outer wall of the vertical cylinder 2. A connecting frame 22 is fixed to the outer end of the belt 21, and the other end of the connecting frame 22 is fixedly connected to the top of the moving block 53. Through the connection between the connecting frame 22 and the moving block 53, each time the screw rod 52 adjusts the position of the moving block 53 to open and close different horizontal cylinders 3, the belt 21 will also rotate accordingly, and then pull the first scraper ring 24 inside the vertical cylinder 2 to slide along the inner wall of the vertical cylinder 2 to clean the inner wall of the vertical cylinder 2. During this process, the moving path of the first scraper ring 24 will not exceed the position of the horizontal cylinder 3 that is currently opened and used, so as to avoid movement interference.

[0026] In this embodiment, a return pipe 63 is provided at the bottom of the back side of the horizontal cylinder 3, and the return pipe 63 is connected to the water tank 6, and the bottom of the vertical cylinder 2 is connected to the water tank 6. The positions where the vertical cylinder 2 and the return pipe 63 are connected to the water tank 6 are both equipped with solenoid valves. A filter plate 65 is fixed inside the water tank 6, and a condensation layer 61 is fixed on one side of the back side of the water tank 6. The condensation layer 61 is connected to the water tank 6 through a pipeline. A water supply pipe 62 is fixed on the top of the condensation layer 61. A bellows 64 is fixed on the water supply pipe 62 corresponding to the position of each group of horizontal cylinders 3. The other end of the bellows 64 penetrates into the moving layer 36 and is connected to the nozzle 33 of the second scraper ring 32. The return pipe 63 at the bottom of each group of horizontal cylinders 3 is at the bottom and is connected to the water tank 6 through a vertical pipe. The electric control of the return pipe 63 The magnetic valve controls the discharge amount of water in the horizontal cylinder 3, keeping the water level in the horizontal cylinder 3 lower than the position of the inlet and outlet pipes 31. The dust dissolves in the water inside the horizontal cylinder 3 and is sent into the water tank 6 through the reflux pipe 63. The same is true for the vertical cylinder 2. The water in the water tank 6 is first sent to the top through the pipeline and sprayed through the spray plate 23. Then the sewage is sent into the water tank 6 through the discharge port at the bottom. The sewage is filtered by the filter plate 65 of the water tank 6. Then the filtered clean water is sent to the condensation layer 61 and then sent back to the horizontal cylinder 3 and the vertical cylinder 2 through the water supply pipe 62 to recycle the water. The nozzle 33 is connected to the water supply pipe 62 by the bellows 64, which is convenient for the connecting rod 37 to drive the second scraper ring 32 to move along the inside of the horizontal cylinder 3. The bellows 64 can maintain the connection between the water supply pipe 62 and the nozzle 33 through its own elasticity.

[0027] When the device is used, the gas generated by the winding of the furnace body 1 is sent into the vertical cylinder 2, and then alternately transported to the three groups of horizontal cylinders 3 through the vertical cylinder 2 for retention. The gas is subjected to primary dust reduction treatment by the spray plate 23 on the vertical cylinder 2, and the gas is subjected to secondary spray dust reduction treatment by the nozzle 33 in the horizontal cylinder 3. The motor 58 drives the screw rod 52 to rotate, and the moving block 53 cooperates with the screw 52 thread to drive the first electric push rod 54 to move vertically. When it moves to the position of the horizontal plate 55, the extended end of the first electric push rod 54 extends and contacts the horizontal plate 55. At this time, the extended end of the first electric push rod 54 The socket 57 of the horizontal plate 55 just corresponds to the second electric push rod 56 on the horizontal plate 55. After the extended end of the second electric push rod 56 is inserted into the socket 57, the locking connection between the horizontal plate 55 and the first electric push rod 54 is completed. Then, through the extension and contraction of the extended end of the first electric push rod 54, the horizontal rod drives the connecting rod 37 to slide along the moving layer 36, pulling the second scraper ring 32 to move along the inner wall of the horizontal cylinder 3. This process can act on the inlet and outlet pipes 31 at both ends of the horizontal cylinder 3 to be closed. When the gas remains in the horizontal cylinder 3, the movement of the second scraper ring 32 can clean the inner wall of the horizontal cylinder 3 on the one hand, preventing dust from leaking out. Dust accumulation, on the other hand, changes the spraying range of the nozzle 33, so that the dust in the gas contacts with water more fully, and the efficiency of dust dissolving in water is accelerated. At the same time, the driving component 5 drives the first scraper ring 24 to move, and there is another part of the function. When the second scraper ring 32 moves to a position close to the inlet and outlet pipe 31, the extended end of the two-way electric push rod 34 located at the center of the second scraper ring 32 pushes the valve plate 35 in the inlet and outlet pipe 31 outward, thereby opening the inlet and outlet pipe 31. The inlet and outlet pipe 31 at one end of the vertical cylinder 2 and the horizontal cylinder 3 can be opened to facilitate the gas to be sent into the horizontal cylinder 3 Inside, after the gas stays for a period of time, the inlet and outlet pipe 31 at one end of the exhaust pipe 4 is opened, and the gas is sent out through the exhaust pipe 4. The dust dissolves in the water inside the horizontal cylinder 3 and is sent into the water tank 6 through the reflux pipe 63. The same is true for the vertical cylinder 2. The water in the water tank 6 is first sent to the top through the pipe and sprayed through the spray plate 23. Then the sewage is sent to the water tank 6 through the discharge port at the bottom. The sewage is filtered by the filter plate 65 of the water tank 6, and then the filtered clean water is sent to the condensation layer 61 and then sent back to the horizontal cylinder 3 and the vertical cylinder 2 through the water supply pipe 62 to recycle the water.

[0028] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A dust removal device for a biomass gasification furnace, comprising a furnace body (1), characterized in that: A water tank (6) is provided on one side of the furnace body (1), and a vertical cylinder (2) is fixed on the top of the water tank (6); an air supply pipe (11) is connected between one side of the top of the vertical cylinder (2) and the furnace body (1); three groups of horizontal cylinders (3) are equidistantly installed on the top of the water tank (6), and inlet and outlet pipes (31) are fixed at both ends of the horizontal cylinder (3); the inlet and outlet pipe (31) at one end of the horizontal cylinder (3) is connected to the vertical cylinder (2), and the inlet and outlet pipe (31) at the other end of the horizontal cylinder (3) is connected to the exhaust pipe (4); a valve plate (35) is slidably connected inside the inlet and outlet pipe (31); a second scraper ring (32) is slidably connected inside the horizontal cylinder (3), and a nozzle (33) is equidistantly installed on the inner side of the top of the second scraper ring (32); and a nozzle (33) is fixed on the top of the vertical cylinder (2). A spray plate (23) is provided at the top of the vertical cylinder (2) and the outer ring of the spray plate (23). The first scraper ring (24) slides along the inner wall of the vertical cylinder (2). A driving assembly (5) is provided at the top of the water tank (6). The driving assembly (5) comprises a screw (52). A moving block (53) is threadedly sleeved on the surface of the screw (52). A first electric push rod (54) is fixed to the outer side of the moving block (53). A moving layer (36) is fixed at the top of the horizontal cylinder (3). A connecting rod (37) is slidably inserted in the moving layer (36). One end of the connecting rod (37) is fixedly connected to the second scraper ring (32). The first electric push rod (54) is alternately connected to the connecting rods (37) of the three groups of horizontal cylinders (3).

2. A dust removal device for a biomass gasification furnace according to claim 1, characterized in that: A fixing frame (38) is fixed to the inner ring of the second scraper ring (32), and a bidirectional electric push rod (34) is fixed at the center of the fixing frame (38). The bidirectional electric push rod (34) can be in compression contact with the valve plates (35) at both ends.

3. The dust removal device for a biomass gasification furnace according to claim 1, characterized in that: The driving assembly (5) further comprises a vertical frame (51), the vertical frame (51) being fixed at a position on the top of the water tank (6) corresponding to the screw rod (52), and the screw rod (52) being rotatably mounted on the vertical frame (51) via a bearing, and a motor (58) being fixed on the top of the vertical frame (51), and an output end of the motor (58) being fixedly connected to the screw rod (52).

4. A dust removal device for a biomass gasification furnace according to claim 3, characterized in that: A transverse plate (55) is fixed to one end of the connecting rod (37) passing through the transverse cylinder (3), and a second electric push rod (56) is fixed on the surface of the transverse plate (55). A plug hole (57) is provided at the extended end of the first electric push rod (54), and the extended end of the second electric push rod (56) can be inserted into the plug hole (57).

5. A dust removal device for a biomass gasification furnace according to claim 4, characterized in that: An annular belt (21) is fixed on the surface of the first scraper ring (24), and the outer side of the belt (21) slides along the outer wall of the vertical cylinder (2). A connecting frame (22) is fixed to the outer end of the belt (21), and the other end of the connecting frame (22) is fixedly connected to the top of the moving block (53).

6. The dust removal device for a biomass gasification furnace according to claim 1, characterized in that: A return pipe (63) is provided at the bottom of the back side of the horizontal cylinder (3), and the return pipe (63) is connected to the water tank (6). The bottom of the vertical cylinder (2) is connected to the water tank (6). Solenoid valves are installed at the locations where the vertical cylinder (2) and the return pipe (63) are connected to the water tank (6).

7. A dust removal device for a biomass gasification furnace according to claim 6, characterized in that: A filter plate (65) is fixed inside the water tank (6), and a condensation layer (61) is fixed on one side of the back of the water tank (6); the condensation layer (61) is connected to the water tank (6) through a pipeline.

8. The dust removal device for a biomass gasification furnace according to claim 7, characterized in that: A water supply pipe (62) is fixed on the top of the condensation layer (61), and a bellows (64) is fixed on the water supply pipe (62) at a position corresponding to each group of horizontal cylinders (3). The other end of the bellows (64) penetrates into the moving layer (36) and is connected to the nozzle (33) of the second scraper ring (32).

9. The dust removal device for a biomass gasification furnace according to claim 2, characterized in that: Springs (39) are fixed equidistantly to the connecting ends of the inlet and outlet pipes (31) and the horizontal cylinder (3), and the other end of the spring (39) is fixedly connected to the valve plate (35).

10. The dust removal device for a biomass gasification furnace according to claim 1, characterized in that: The exhaust pipe (4) is connected to the middle position of the inlet and outlet pipe (31), and an accommodating cavity for receiving the valve plate (35) is provided on the outer side of the inlet and outlet pipe (31) at the connection position with the exhaust pipe (4).

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