A feeding structure for a biomass gasification furnace

Abstract

This invention relates to the field of biomass gasification furnace technology and discloses a feeding structure for a biomass gasification furnace, including a furnace body. A feed lifter is located on one side of the furnace body, and an upper feed pipe is located on one side of the top of the furnace body. The upper feed pipe is positioned below the top end of the feed lifter. The feed lifter raises biomass fuel and feeds it into the furnace body through the upper feed pipe. An auger shaft is located inside the furnace body, and spiral blades are fixedly installed on the auger shaft. A discharge channel is located at the top of the furnace body, and an upper sealing plate and a lower sealing plate are installed within the discharge channel. The upper and lower sealing plates alternately block the discharge channel during feeding. By alternately blocking the discharge channel with the upper and lower sealing plates, when the upper sealing plate opens, the lower sealing plate is in a blocked state; when the upper sealing plate closes, the lower sealing plate opens. This ensures that the gasification furnace is always isolated from the outside environment, achieving continuous feeding of the gasification furnace without leakage.

Description

Technical Field

[0001] This invention relates to the field of biomass gasification furnace technology, specifically to a feeding structure for a biomass gasification furnace. Background Technology

[0002] With the rapid development of industry and the high-speed advancement of urbanization, energy shortages and environmental pollution have become the focus of attention in today's society. The search for more extensive and cleaner energy sources has become particularly urgent. As a result, the utilization and promotion of biomass energy has made great progress. Biomass gasification technology is a technology of thermochemical conversion of biomass. Under incomplete combustion conditions, the higher molecular weight organic hydrocarbon chains in biomass fuel are cracked and transformed into combustible gases such as CO, H2, and CH4 with lower molecular weight. For providing biomass fuel gas to boiler terminals, the most common and mature gasification technology is air biomass gasification technology, and biomass gasifiers are commonly used equipment for biomass fuel gas production.

[0003] Currently, there are two main feeding methods for biomass gasifiers. One method involves feeding from the top of the gasifier, allowing the material to fall freely under its own weight and distribute within the gasifier. The other method uses a auger to feed from the side, propelling the material using the axial force of the auger. However, when using gasifiers with these feeding methods, the first method is prone to gas overflow or air intake, affecting the safety of the gasifier. The second method, auger feeding, while ensuring the feed inlet is sealed, is easily blocked by large pieces of material, which, if not cleared in time, can lead to auger shaft breakage. Summary of the Invention

[0004] This invention provides a feeding structure for a biomass gasification furnace, which has the advantages of not clogging and not leaking, and solves the technical problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a feeding structure for a biomass gasification furnace, comprising a furnace body, a lifting machine on one side of the furnace body, and an upper feeding pipe on one side of the top of the furnace body. The upper feeding pipe is located below the top end of the lifting machine. The lifting machine lifts the biomass fuel and feeds it into the furnace body through the upper feeding pipe. A auger shaft is installed inside the furnace body, and spiral blades are fixedly installed on the auger shaft. From bottom to top, a lower feeding pipe, a lower guide pipe, an intermediate guide pipe, and an upper guide pipe are sequentially installed on the top of the furnace body. The top of the upper guide pipe is fixedly connected to the bottom of the upper feeding pipe. The upper guide pipe has a discharge pipe at the top of its inner cavity, and the bottom of the discharge pipe is inclined downward. The inner cavities of the lower feed pipe, lower guide pipe, middle guide pipe, upper guide pipe, upper feed pipe, and discharge pipe are connected. The upper guide pipe has an upper sealing plate inside that blocks the bottom opening of the discharge pipe. The rotation of the upper sealing plate is driven by a first hydraulic cylinder located on one side of the middle guide pipe. The lower guide pipe has a lower sealing plate movably fitted inside it. The movement of the lower sealing plate is driven by a second hydraulic cylinder located on one side of the middle guide pipe. The upper sealing plate and the lower sealing plate alternately block the discharge channel when feeding.

[0006] Optionally, the spiral blade is located directly below the upper feed pipe, and a smoke guide pipe is connected to one side of the top of the upper feed pipe.

[0007] Optionally, a positioning shaft is fixedly fitted on one side of the upper sealing plate, and the two ends of the positioning shaft extend outwards from the front and rear sides of the upper guide tube, respectively. A support plate is provided on one side of the middle guide tube. The first hydraulic cylinder and the second hydraulic cylinder are both fixedly mounted on the support plate. The end of the first hydraulic cylinder facing the positioning shaft drives a first piston shaft, and one end of the first piston shaft is rotatably sleeved with the positioning shaft. One end of the second hydraulic cylinder drives a second piston shaft. A sealing plate pull shaft is fixedly connected to the side of the lower sealing plate facing the second hydraulic cylinder. The end of the sealing plate pull shaft away from the lower sealing plate is rotatably sleeved with the second piston shaft of the second hydraulic cylinder.

[0008] Optionally, the first hydraulic cylinder has a first piston fixedly connected to one end of a first piston shaft inside its internal movable assembly. A sealing block is fixedly mounted in the middle of the first hydraulic cylinder. A first oil pipe located on one side of the first piston shaft is connected to the top of the first hydraulic cylinder. A connecting shaft is fixedly connected to the side of the first piston away from the first piston shaft. The end of the connecting shaft away from the first piston passes through the sealing block and is fixedly connected to a second piston. Two oil guide branches are connected to the top of the first hydraulic cylinder. One oil guide branch is located directly above the first hydraulic cylinder, and the other oil guide branch is located on the top of the first hydraulic cylinder away from the first oil pipe. The ends of both oil guide branches away from the first hydraulic cylinder are connected to the second oil pipe. A middle oil pipe located below the second piston is connected to the bottom of the first hydraulic cylinder. The middle oil pipe is close to the second piston and faces the sealing block. The end of the middle oil pipe away from the first hydraulic cylinder is fixedly connected to the second hydraulic cylinder. A third piston fixedly connected to one end of the second piston shaft is internally movable assembly in the second hydraulic cylinder. The top of the side of the second hydraulic cylinder away from the middle oil pipe is connected to the third oil pipe.

[0009] Optionally, the bottom of the first hydraulic cylinder is fixedly connected to an adjusting tube located between the sealing block and the first piston, and the adjusting tube is close to the sealing block. A fourth piston is movably fitted inside the adjusting tube. A spring is provided between the bottom of the fourth piston and the inner bottom of the adjusting tube. A vertical shaft located inside the spring is fixedly connected to the middle of the inner bottom of the adjusting tube. Two electrical contacts are fixedly connected to the top of the vertical shaft, and the two electrical contacts do not contact each other. The two electrical contacts are electrically connected to wires, and the two wires extend out of the adjusting tube. Two conductive plates are fixedly connected to the bottom of the fourth piston, located directly above the electrical contacts, and the bottom of the conductive plates is movably connected to the top of the electrical contacts. A motor is fixedly installed on the side of the upper sealing plate facing the feed pipe. The motor is located outside the feed tube. A geared motor is provided on the side of the upper sealing plate away from the feed tube, and the output shaft of the motor is fixedly connected to the input shaft of the geared motor. The output shaft of the geared motor passes through the upper sealing plate and is fixedly connected to a passive rotating shaft. Four arc-shaped rods are fixedly connected to the outside of the passive rotating shaft. The four arc-shaped rods are arranged in a circumferential array outside the passive rotating shaft. An arc-shaped shaft is fixedly connected to the end of the arc-shaped rod away from the passive rotating shaft. The bottom of the feed tube is provided with four grooves that match the arc-shaped rods. The motor is electrically connected to one electrode of the power supply through a wire. The motor is electrically connected to one electrical contact on the vertical shaft. Another electrical contact on the vertical shaft is electrically connected to another electrode of the power supply through a wire.

[0010] Optionally, pull ropes are fixedly sleeved on both the front and rear sides of the positioning shaft, and a counterweight is fixedly connected to the end of the pull rope away from the positioning shaft. An inclined plate is fixedly connected to the support plate, and the counterweight is movably placed on the inclined plate.

[0011] Optionally, a first limiting block is fixedly connected to the inner wall of the first hydraulic cylinder away from the first piston shaft. The outer side of the first limiting block does not contact the inner wall of the first hydraulic cylinder, and the side of the first limiting block away from the inner wall of the first hydraulic cylinder is located between the oil guide branch pipe and the second piston. A second limiting block is fixedly connected to the inner wall of the second hydraulic cylinder, and the side of the second limiting block away from the inner wall of the second hydraulic cylinder is located between the third piston and the third oil pipe.

[0012] Optionally, a scraper is fixedly installed at the top of the inner cavity of the lower guide tube, the bottom of the scraper is movably connected to the top of the lower sealing plate, and the scraper is located on the side close to the sealing plate pull shaft.

[0013] This invention provides a feeding structure for a biomass gasification furnace, which has the following beneficial effects:

[0014] 1. The feeding structure of this biomass gasifier is designed with a feeding channel consisting of a lower feed pipe, an intermediate feed pipe, an upper feed pipe, an upper feed pipe, and a discharge pipe. The design utilizes separate steps of sealing the discharge pipe with an upper sealing plate and sealing the lower feed pipe with a lower sealing plate. This design divides the material's entry into the gasifier through the upper feed pipe into two processes. When the upper sealing plate opens the discharge pipe, the lower sealing plate is in a state of sealing the lower feed pipe. Then, the upper sealing plate seals the discharge pipe, and the lower sealing plate opens the inner channel of the lower feed pipe. This ensures that the gasifier is always isolated from the outside environment during the feeding process, achieving continuous feeding of the gasifier without leakage.

[0015] 2. This biomass gasifier uses a feeding structure. A first hydraulic cylinder drives the upper sealing plate to rotate and open the feed pipe, while a second hydraulic cylinder drives the lower sealing plate to move and open the lower guide pipe. An intermediate oil pipe connects the first and second hydraulic cylinders. During the process of injecting oil and pressurizing to control the upper sealing plate to block the feed pipe, and then the second hydraulic cylinder injects oil to control the lower sealing plate to open the lower guide pipe, the intermediate oil pipe remains closed when the upper sealing plate cannot completely block the feed pipe. This prevents the lower sealing plate from opening the counterweight during step feeding, which could lead to leakage as the upper sealing plate and feed pipe become blocked by biomass material, preventing a complete seal. This further ensures the feeding and sealing effect of the gasifier and eliminates the need for manual cleaning of blocked biomass material, simplifying operation.

[0016] 3. The biomass gasifier uses a feeding structure with an intermediate guide pipe on the upper sealing plate facing the feed pipe. The intermediate guide pipe is driven to rotate by an electric motor. It works in conjunction with an adjusting pipe connected to the first hydraulic cylinder. The adjusting pipe contains a fourth piston and a spring. When the upper sealing plate and the feed pipe are blocked by biomass raw materials, the first piston in the first hydraulic cylinder cannot move further under oil pressure, opening the intermediate oil pipe. Then, the fourth piston moves under oil pressure, energizing the electric motor and driving the arc rod to rotate. This disperses the biomass raw materials blocking the feed pipe and the upper sealing plate until the upper sealing plate rotates to block the feed pipe. At this time, the arc rod is located in the groove at the bottom of the feed pipe, thus maintaining the blocked feed pipe state without manual intervention. This ensures the sealing effect of the gasifier and avoids the problem of affecting the feeding efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 For the present invention Figure 1 Schematic diagram of the material feeding channel;

[0019] Figure 3 For the present invention Figure 2 A schematic diagram of the cross-sectional structure;

[0020] Figure 4 For the present invention Figure 2 A cross-sectional schematic diagram of the two hydraulic cylinders;

[0021] Figure 5 For the present invention Figure 3 A schematic diagram of the regulating pipe structure;

[0022] Figure 6 For the present invention Figure 3 Top view of the upper sealing plate structure;

[0023] Figure 7 For the present invention Figure 3 Medium motor and Figure 5 The circuit block diagram of the two conductive plates.

[0024] In the diagram: 1. Furnace body; 2. Feeder; 3. Lower feed pipe; 4. Lower guide pipe; 5. Intermediate guide pipe; 6. Upper guide pipe; 7. Upper feed pipe; 8. Drone shaft; 9. Spiral blades; 10. Feed pipe; 11. Upper sealing plate; 12. Positioning shaft; 13. First hydraulic cylinder; 14. Counterweight; 15. Lower sealing plate; 16. Sealing plate pull shaft; 17. Second hydraulic cylinder; 18. Support plate; 19. Smoke guide pipe; 20. Arc-shaped shaft; 21. First piston shaft; 22. Second piston shaft; 3. Scraper; 24. Passive rotating shaft; 25. Arc-shaped rod; 26. Electric motor; 27. Gear motor; 28. First piston; 29. ​​Sealing block; 30. First oil pipe; 31. Oil guide branch pipe; 32. Connecting shaft; 33. Second piston; 34. Second oil pipe; 35. Adjusting pipe; 36. Third piston; 37. Fourth piston; 38. Spring; 39. Vertical shaft; 40. Electrical contact piece; 41. Conductive piece; 42. Third oil pipe; 43. Intermediate oil pipe; 44. First limiting block; 45. Second limiting block. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1A feeding structure for a biomass gasification furnace includes a furnace body 1. A lifting machine 2 is located on one side of the furnace body 1, and an upper feeding pipe 7 is located on one side of the top of the furnace body 1. The upper feeding pipe 7 is positioned below one end of the top of the lifting machine 2. The lifting machine 2 lifts biomass fuel and feeds it into the furnace body 1 through the upper feeding pipe 7. An auger shaft 8 is located inside the furnace body 1. The auger shaft 8 is driven to rotate by a drive motor located outside the furnace body 1. Both ends of the auger shaft 8 are movably connected to the inner walls of both sides of the furnace body 1. Spiral blades 9 are located on the outer side of the auger shaft 8, directly below the upper feeding pipe 7. Since both ends of the auger shaft 8 are connected to the inner walls of the furnace body 1, and the spiral blades 9 on the auger shaft 8 are only located directly below the upper feeding pipe 7, this design is more efficient than existing biomass gasification furnaces where the auger shaft 8 is completely fitted with a spiral blade. The design of the spiral blade 9 ensures that the auger shaft 8 drives the spiral blade 9 to rotate, pushing the biomass fuel falling into the furnace body 1 from the upper feed pipe 7 forward. The biomass fuel is pushed to the front gap, and when the material is sufficient, the material will continuously fill the front gap, thereby achieving the effect of uniform material distribution throughout the furnace. Furthermore, the axial reaction force and resistance experienced by the spiral blade 9 during rotation are reduced, preventing the auger shaft 8 from being easily bent and broken due to excessive force, thus improving the service life of the gasifier. When large pieces of unprocessed material fall into the furnace body 1, the auger shaft 8 can also drive the spiral blade 9 to rotate, thereby moving the large pieces of material and preventing them from easily clogging the spiral blade 9 and the gasifier inlet, preventing feeding, rapid current increase, and the phenomenon of the auger shaft 8 breaking.

[0027] Please see Figures 1-3A lower feed pipe 3 is fixedly installed on the top of the furnace body 1. The lower feed pipe 3 is located directly below the upper feed pipe 7. A lower guide pipe 4 is fixedly installed on the top of the lower feed pipe 3. An upper guide pipe 6 is fixedly installed on the top of the lower guide pipe 4. The top of the upper guide pipe 6 is fixedly connected to the bottom of the upper feed pipe 7. A discharge pipe 10 is provided at the top of the inner cavity of the upper guide pipe 6, and the bottom end of the discharge pipe 10 is inclined downward. The inner cavities of the lower feed pipe 3, lower guide pipe 4, intermediate guide pipe 5, upper guide pipe 6, upper feed pipe 7, and discharge pipe 10 are connected, and the lower feed pipe 3 and lower guide pipe 4... The intermediate guide pipe 5, upper guide pipe 6, upper feed pipe 7, and discharge pipe 10 constitute a discharge channel. The upper guide pipe 6 has an upper sealing plate 11 inside to block the bottom opening of the discharge pipe 10. A positioning shaft 12 is fixedly fitted on one side of the upper sealing plate 11. Both ends of the positioning shaft 12 extend outwards from the front and rear sides of the upper guide pipe 6, respectively. A support plate 18 is provided on one side of the intermediate guide pipe 5. A first hydraulic cylinder 13 is fixedly installed on the support plate 18. The end of the first hydraulic cylinder 13 facing the positioning shaft 12 drives a first piston shaft 21. One end of the first piston shaft 21 is rotatably connected to the positioning shaft 12. The pressure cylinder 13 drives the first piston shaft 21 to move, thereby causing the positioning rotating shaft 12 to drive the upper sealing plate 11 to rotate, thus sealing or opening the feed pipe 10. A lower sealing plate 15 is movably fitted inside the lower guide pipe 4. A second hydraulic cylinder 17 located on one side of the lower guide pipe 4 is fixedly installed on the support plate 18. One end of the second hydraulic cylinder 17 drives a second piston shaft 22. A sealing plate pull shaft 16 is fixedly connected to the side of the lower sealing plate 15 facing the second hydraulic cylinder 17. The end of the sealing plate pull shaft 16 away from the lower sealing plate 15 is rotatably sleeved with the second piston shaft 22 of the second hydraulic cylinder 17. The second piston shaft 22 is driven by the second hydraulic cylinder 17. The piston shaft 22 moves horizontally, pushing the lower sealing plate 15 to move inside the lower feed pipe 4, thereby opening or blocking the upper and lower sides of the lower feed pipe 4. Thus, the process of material falling into the furnace body 1 through the upper feed pipe 7 can be divided into two processes. When the upper sealing plate 11 opens the channel of the feed pipe 10, the lower sealing plate 15 is in the state of blocking the lower feed pipe 4. Then, the upper sealing plate 11 blocks the feed pipe 10, and the lower sealing plate 15 opens the inner channel of the lower feed pipe 4. Thus, during the feeding process, the gasifier can always be isolated from the outside world, achieving the effect of continuous feeding of the gasifier without leakage.

[0028] Please see Figure 4The first hydraulic cylinder 13 has a first piston 28 internally mounted and fixedly connected to one end of the first piston shaft 21. A sealing block 29 is fixedly mounted in the middle of the first hydraulic cylinder 13. A first oil pipe 30 located on one side of the first piston shaft 21 is connected to the top of the first hydraulic cylinder 13. A connecting shaft 32 is fixedly connected to the side of the first piston 28 away from the first piston shaft 21. The end of the connecting shaft 32 away from the first piston 28 passes through the sealing block 29 and is fixedly connected to a second piston 33. Two oil guide branches 31 are connected to the top of the first hydraulic cylinder 13. Both oil guide branches 31 are located directly above the first hydraulic cylinder 13. Both are located on the top of the first hydraulic cylinder 13 away from the first oil pipe 30. The ends of the two oil guide branches 31 away from the first hydraulic cylinder 13 are connected to the second oil pipe 34. The bottom of the first hydraulic cylinder 13 is connected to the middle oil pipe 43 located below the second piston 33. The middle oil pipe 43 is close to the side of the second piston 33 facing the sealing block 29. The end of the middle oil pipe 43 away from the first hydraulic cylinder 13 is fixedly connected to the second hydraulic cylinder 17. The second hydraulic cylinder 17 is internally fitted with a third piston 36 fixedly connected to one end of the second piston shaft 22. The top of the side of the second hydraulic cylinder 17 away from the middle oil pipe 43 is connected to the third oil pipe 42.

[0029] Please see Figures 2-4When feeding material into the furnace body 1, oil is injected and pressurized into the first hydraulic cylinder 13 through the first oil pipe 30, causing the first piston 28 to drive the first piston shaft 21 to move towards one side of the sealing block 29. The first piston shaft 21 pulls the positioning shaft 12 to rotate, causing the positioning shaft 12 to drive the upper sealing plate 11 to rotate. The upper sealing plate 11 opens the channel of the feed pipe 10, and the biomass fuel falls into the lower guide pipe 4 above the lower sealing plate 15. Then, oil is injected and pressurized into the other side of the first piston 28 in the first hydraulic cylinder 13 through the second oil pipe 34, causing the first piston 28 to push the first piston shaft 21 to move back to its original position. The first piston shaft 21 pushes the positioning shaft 12 to rotate in the opposite direction, causing the positioning shaft 12 to drive the upper sealing plate 11 to rotate in the opposite direction to reseal the bottom of the feed pipe 10. At this time, the first piston 28 drives the movement of the connecting shaft 32 and the second piston 33, causing the second piston 33 to open. Hydraulic oil injected through the intermediate oil pipe 43 and the second oil pipe 34 enters the second hydraulic cylinder 17 through the intermediate oil pipe 43, pushing the third piston 36 to move towards the side of the third oil pipe 42. The third piston 36 pulls the second piston shaft 22, the sealing plate pull shaft 16, and the lower sealing plate 15 to move as a whole, thereby opening the lower feed pipe 4. The biomass raw material on the lower sealing plate 15 falls into the furnace body 1. Then, oil is injected and pressurized into the second hydraulic cylinder 17 through the third oil pipe 42, pushing the third piston 36, the second piston shaft 22, the sealing plate pull shaft 16, and the lower sealing plate 15 to move in the opposite direction, so that the lower sealing plate 15 re-seals the lower feed pipe 4. Then, oil is injected and pressurized into the first hydraulic cylinder 13 through the first oil pipe 30, pushing the first piston 28 to drive the first piston shaft 21 to move towards the side of the sealing block 29, thereby opening the feed pipe 10. This ensures that the interior of the gasifier is always isolated from the outside during the feeding process.

[0030] The bottom of the first hydraulic cylinder 13 is fixedly connected to an adjusting pipe 35 located between the sealing block 29 and the first piston 28, and the adjusting pipe 35 is close to the sealing block 29. Please refer to [link / reference needed]. Figure 5 The regulating tube 35 has a fourth piston 37 inside, and a spring 38 is provided between the bottom of the fourth piston 37 and the inner bottom of the regulating tube 35. The middle of the inner bottom of the regulating tube 35 is fixedly connected to a vertical shaft 39 located inside the spring 38. The top of the vertical shaft 39 is fixedly connected to two electrical contacts 40, which do not contact each other. The two electrical contacts 40 are electrically connected to wires, and the two wires extend out of the regulating tube 35. The bottom of the fourth piston 37 is fixedly connected to two conductive plates 41 located directly above the electrical contacts 40, and the bottom of the conductive plates 41 is movably connected to the top of the electrical contacts 40.

[0031] Please see Figure 3 and Figure 6A motor 26 is fixedly installed on the side of the upper sealing plate 11 facing the feed tube 10, and the motor 26 is located outside the feed tube 10. A geared motor 27 is provided on the side of the upper sealing plate 11 away from the feed tube 10, and the output shaft of the motor 26 is fixedly connected to the input shaft of the geared motor 27. The output shaft of the geared motor 27 passes through the upper sealing plate 11 and is fixedly connected to a passive rotating shaft 24. Four arc-shaped rods 25 are fixedly connected to the outside of the passive rotating shaft 24. The four arc-shaped rods 25 are arranged in a circumferential array outside the passive rotating shaft 24. An arc-shaped shaft 20 is fixedly connected to the end of the arc-shaped rod 25 away from the passive rotating shaft 24. The bottom of the feed tube 10 is provided with four grooves that are adapted to the arc-shaped rods 25.

[0032] Please participate Figure 3-7The motor 26 is electrically connected to one electrode of the power supply via a wire. The motor 26 is also electrically connected to one contact 40 on the vertical shaft 39. Another contact 40 on the vertical shaft 39 is electrically connected to the other electrode of the power supply via a wire. When oil is injected and pressurized into the first hydraulic cylinder 13 through the second oil pipe 34, the oil pushes the first piston 28, causing the first piston shaft 21 to move toward one side of the first oil pipe 30. The first piston shaft 21 pushes the positioning shaft 12 to rotate, and the positioning shaft 12 causes the upper sealing plate 11 to rotate to block the feed pipe 10. When the upper sealing plate 11 and the feed pipe 10 are blocked by biomass raw materials... This prevents the upper sealing plate 11 from rotating into position and blocking the feed pipe 10. At this time, the first piston 28 cannot move further toward the first oil pipe 30, and the second piston 33 remains in the state of blocking the intermediate oil pipe 43. The oil pressure injected through the second oil pipe 34 continues to increase, causing the fourth piston 37 to overcome the elastic force of the spring 38 and move downwards until the conductive sheet 41 contacts the two electrical contacts 40. The motor 26 is then energized to drive the reduction motor 27 to rotate. Due to the reduction transmission of the reduction motor 27, even when the biomass raw material is subjected to significant extrusion pressure between the feed pipe 10 and the upper sealing plate 11, the electric motor... Machine 26 can also drive the geared motor 27 to rotate, which in turn drives the passive rotating shaft 24 to slowly rotate the arc rod 25, dispersing the biomass raw material between the feed pipe 10 and the upper sealing plate 11 until the upper sealing plate 11 rotates to block the feed pipe 10. At this time, the arc rod 25 is located in the groove at the bottom of the feed pipe 10, thus maintaining the state of blocking the feed pipe 10. After the upper sealing plate 11 can rotate to block the feed pipe 10, the continued movement of the first piston 28 also pulls the second piston 33 to move, thereby opening the intermediate oil pipe 43, allowing hydraulic oil to enter the second hydraulic cylinder 17 through the intermediate oil pipe 43. The third piston 36 is pushed to pull the second piston shaft 22, the sealing plate pull shaft 16, and the lower sealing plate 15 to move as a whole, opening the lower feed pipe 4. This ensures that the lower sealing plate 15 will only open after the upper sealing plate 11 completely blocks the feed pipe 10 during the feeding process. This avoids the problem of leakage caused by the lower sealing plate 15 opening the counterweight block 14 when the upper sealing plate 11 and the feed pipe 10 are blocked by biomass raw materials during step feeding, which would lead to the connection between the inside and outside of the gasifier. This further ensures the feeding and sealing effect of the gasifier, and eliminates the need for manual cleaning of the blocked biomass raw materials, making it more convenient to use.

[0033] Please continue reading. Figures 3-4The top of the upper feed pipe 6 is connected to a flue pipe 19 located on one side of the top of the feed pipe 10, so that when the lower sealing plate 15 opens the lower feed pipe 4, the flue gas entering from the furnace body 1 can be discharged through the flue pipe 19, thus preventing the flue gas in the upper feed pipe 6 from leaking out through the feed pipe 10 when the feed pipe 10 is opened later, and further ensuring the isolation effect between the gasifier and the outside world. A scraper 23 is fixedly installed on the top of the inner cavity of the lower feed pipe 4. The bottom of the scraper 23 is movably connected to the top of the lower sealing plate 15, and the scraper 23 is located on the side close to the sealing plate pull shaft 16. When the lower sealing plate 15 moves with the sealing plate pull shaft 16 to open the lower feed pipe 4, the scraper 23 scrapes the material so that the biomass raw material on the top of the lower sealing plate 15 falls down.

[0034] Pull ropes are fixedly sleeved on both the front and rear sides of the positioning shaft 12. A counterweight 14 is fixedly connected to the end of the pull rope away from the positioning shaft 12. An inclined plate is fixedly connected to the support plate 18. The counterweight 14 is movably placed on the inclined plate. By adding the counterweight 14, the positioning shaft 12 can be pulled, so that the positioning shaft 12 keeps driving the upper sealing plate 11 to rotate toward the feed pipe 10 to seal it. This prevents the problem of needing more energy to drive the upper sealing plate 11 to seal the feed pipe 10 due to the gravity of the biomass raw material in the feed pipe 10.

[0035] A first limiting block 44 is fixedly connected to the inner wall of the first hydraulic cylinder 13 away from the first piston shaft 21. The outer side of the first limiting block 44 does not contact the inner wall of the first hydraulic cylinder 13, and the side of the first limiting block 44 away from the inner wall of the first hydraulic cylinder 13 is located between the oil guide branch pipe 31 and the second piston 33, ensuring that the second piston 33 will not block the oil guide branch pipe 31. A second limiting block 45 is fixedly connected to the inner wall of the second hydraulic cylinder 17. The side of the second limiting block 45 away from the inner wall of the second hydraulic cylinder 17 is located between the third piston 36 and the third oil pipe 42, ensuring that the third piston 36 will not block the third oil pipe 42.

[0036] In operation, the biomass gasifier uses a feeding structure where the feeder 2 lifts the biomass material upwards, and the raw material falls into the upper feed pipe 7. First, the first hydraulic cylinder 13 drives the first piston shaft 21 to move, pushing the positioning shaft 12 to rotate, causing the upper sealing plate 11 to open the feed pipe 10. The biomass material in the upper feed pipe 7 falls into the upper guide pipe 6 through the feed pipe 10 and finally falls onto the lower sealing plate 15. Then, the first hydraulic cylinder 13 drives the first piston shaft 21 to move in the opposite direction, causing the positioning shaft 12 to drive the upper sealing plate 11 to rotate in the opposite direction and close the feed pipe 10. Then, the second hydraulic cylinder 17 drives the second piston shaft 22 to move the lower sealing plate 15, opening the lower guide pipe 4. The biomass material on the lower sealing plate 15 falls into the furnace body 1 above the spiral blades 9. The drive motor located in the furnace body 1 drives the auger shaft 8 to rotate the spiral blades 9. The spiral blades 9 push the falling biomass material forward for combustion and gasification.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding structure for a biomass gasification furnace, comprising a furnace body (1), a lifting machine (2) provided on one side of the furnace body (1), and an upper feeding pipe (7) provided on one side of the top of the furnace body (1), the upper feeding pipe (7) being located below one end of the top of the lifting machine (2), the biomass fuel being lifted by the lifting machine (2) and fed into the furnace body (1) through the upper feeding pipe (7), the furnace body (1) being provided with a auger shaft (8), and a spiral blade (9) being fixedly installed on the auger shaft (8), characterized in that: The top of the furnace body (1) is equipped with a lower feed pipe (3), a lower guide pipe (4), an intermediate guide pipe (5), and an upper guide pipe (6) in sequence from bottom to top. The top of the upper guide pipe (6) is fixedly connected to the bottom of the upper feed pipe (7). The top of the inner cavity of the upper guide pipe (6) is provided with a discharge pipe (10), and the bottom end of the discharge pipe (10) is inclined downward. The inner cavity of the lower feed pipe (3), lower guide pipe (4), intermediate guide pipe (5), upper guide pipe (6), upper feed pipe (7), and discharge pipe (10) are arranged in a downward direction. The upper guide tube (6) is connected to the lower guide tube (4), and the upper sealing plate (11) is provided inside to block the bottom opening of the lower guide tube (10). The rotation of the upper sealing plate (11) is driven by the first hydraulic cylinder (13) located on one side of the middle guide tube (5). The lower guide tube (4) is movably fitted with a lower sealing plate (15). The movement of the lower sealing plate (15) is driven by the second hydraulic cylinder (17) located on one side of the middle guide tube (5). The upper sealing plate (11) and the lower sealing plate (15) alternately block the lower guide tube during feeding. A positioning shaft (12) is fixedly fitted on one side of the upper sealing plate (11). The two ends of the positioning shaft (12) extend out of the front and rear sides of the upper guide tube (6). A support plate (18) is provided on one side of the middle guide tube (5). The first hydraulic cylinder (13) and the second hydraulic cylinder (17) are both fixedly installed on the support plate (18). The first hydraulic cylinder (13) drives a first piston shaft (21) at one end facing the positioning shaft (12). One end of the first piston shaft (21) is rotatably sleeved with the positioning shaft (12). The second hydraulic cylinder (17) drives a second piston shaft (22) at one end. A sealing plate pull shaft (16) is fixedly connected on the side of the lower sealing plate (15) facing the second hydraulic cylinder (17). The end of the sealing plate pull shaft (16) away from the lower sealing plate (15) is rotatably sleeved with the second piston shaft (22) of the second hydraulic cylinder (17). The first hydraulic cylinder (13) has a first piston (28) internally mounted and fixedly connected to one end of the first piston shaft (21). A sealing block (29) is fixedly mounted in the middle of the first hydraulic cylinder (13). The top of the first hydraulic cylinder (13) is connected to a first oil pipe (30) located on one side of the first piston shaft (21). A connecting shaft (32) is fixedly connected to the side of the first piston (28) away from the first piston shaft (21). The end of the connecting shaft (32) away from the first piston (28) passes through the sealing block (29) and is fixedly connected to a second piston (33). The top of the first hydraulic cylinder (13) is connected to two oil guide branches (31). One oil guide branch (31) is located directly above the first hydraulic cylinder (13), and the other oil guide branch (31) is located on the other side of the first hydraulic cylinder (13). The first hydraulic cylinder (13) is located on the top side away from the first oil pipe (30). The two oil guide branches (31) are connected to the second oil pipe (34) at the ends away from the first hydraulic cylinder (13). The bottom of the first hydraulic cylinder (13) is connected to the middle oil pipe (43) located below the second piston (33). The middle oil pipe (43) is close to the second piston (33) and faces the sealing block (29). The end of the middle oil pipe (43) away from the first hydraulic cylinder (13) is fixedly connected to the second hydraulic cylinder (17). The second hydraulic cylinder (17) is internally fitted with a third piston (36) fixedly connected to one end of the second piston shaft (22). The top of the second hydraulic cylinder (17) away from the middle oil pipe (43) is connected to the third oil pipe (42).

2. The feeding structure for a biomass gasification furnace according to claim 1, characterized in that: The spiral blade (9) is located directly below the upper feed pipe (7), and a smoke guide pipe (19) is connected to one side of the top of the upper guide pipe (6).

3. The feeding structure for a biomass gasification furnace according to claim 1, characterized in that: The bottom of the first hydraulic cylinder (13) is fixedly connected to an adjusting tube (35) located between the sealing block (29) and the first piston (28), and the adjusting tube (35) is close to the sealing block (29). A fourth piston (37) is movably fitted inside the adjusting tube (35). A spring (38) is provided between the bottom of the fourth piston (37) and the inner bottom of the adjusting tube (35). A vertical shaft (39) located inside the spring (38) is fixedly connected to the middle of the inner bottom of the adjusting tube (35). 9) has two electrical contacts (40) fixedly connected to its top, and the two electrical contacts (40) do not contact each other. The two electrical contacts (40) are electrically connected to wires, and the two wires extend out of the outside of the regulating tube (35). The bottom of the fourth piston (37) is fixedly connected to two conductive plates (41) located directly above the electrical contacts (40), and the bottom of the conductive plates (41) is movably connected to the top of the electrical contacts (40). The upper sealing plate (11) is fixedly installed with a motor (2) on the side facing the feed tube (10). 6), and the motor (26) is located outside the feed pipe (10). The upper sealing plate (11) is provided with a geared motor (27) on the side away from the feed pipe (10). The output shaft of the motor (26) is fixedly connected to the input shaft of the geared motor (27). The output shaft of the geared motor (27) passes through the upper sealing plate (11) and is fixedly connected to a passive rotating shaft (24). Four arc-shaped rods (25) are fixedly connected to the outside of the passive rotating shaft (24). The four arc-shaped rods (25) are arranged in a circular array in the passive rotating shaft. On the outside of the rotating shaft (24), the end of the arc rod (25) away from the passive rotating shaft (24) is fixedly connected to the arc shaft (20). The bottom of the feed tube (10) is provided with four grooves that are adapted to the arc rod (25). The motor (26) is electrically connected to one electrode of the power supply through a wire. The motor (26) is electrically connected to one electrical contact (40) on the vertical shaft (39). Another electrical contact (40) on the vertical shaft (39) is electrically connected to another electrode of the power supply through a wire.

4. The feeding structure for a biomass gasification furnace according to claim 1, characterized in that: Pull ropes are fixedly sleeved on the front and rear sides of the positioning shaft (12). A counterweight (14) is fixedly connected to one end of the pull rope away from the positioning shaft (12). An inclined plate is fixedly connected to the support plate (18). The counterweight (14) is movably placed on the inclined plate.

5. The feeding structure for a biomass gasification furnace according to claim 1, characterized in that: A first limiting block (44) is fixedly connected to the inner wall of the first hydraulic cylinder (13) away from the first piston shaft (21). The outer side of the first limiting block (44) does not contact the inner wall of the first hydraulic cylinder (13), and the side of the first limiting block (44) away from the inner wall of the first hydraulic cylinder (13) is located between the oil guide branch pipe (31) and the second piston (33). A second limiting block (45) is fixedly connected to the inner wall of the second hydraulic cylinder (17). The side of the second limiting block (45) away from the inner wall of the second hydraulic cylinder (17) is located between the third piston (36) and the third oil pipe (42).

6. The feeding structure for a biomass gasification furnace according to claim 1, characterized in that: A scraper (23) is fixedly installed on the top of the inner cavity of the lower guide tube (4). The bottom of the scraper (23) is movably connected to the top of the lower sealing plate (15), and the scraper (23) is located on the side close to the sealing plate pull shaft (16).

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