Biomass horizontal carbonization furnace waste heat recovery device and method thereof

Abstract

The invention discloses a biomass horizontal carbonization furnace waste heat recovery device and method, and relates to the technical field of carbonization furnaces, the biomass horizontal carbonization furnace waste heat recovery device comprises a horizontal carbonization furnace and a cooling bin, a heat insulation pipeline is fixedly installed on the surface of the horizontal carbonization furnace, a material conveying bin is fixedly installed at the other end of the heat insulation pipeline, and a feeding hopper is fixedly installed at the top of the material conveying bin; a spiral blade rotatably penetrates through one surface, far away from the heat insulation pipeline, of the material conveying bin, and comprises a three-way pipe, the three-way pipe fixedly penetrates through the inner wall and the outer wall of the horizontal carbonization furnace, a valve and a hollow frame are arranged on the three-way pipe, the hollow frame is fixedly mounted on the circumferential surface of the material conveying bin, and the hollow frame is fixedly connected with the three-way pipe; moisture in biomass raw materials is evaporated through the preheating device, it is ensured that the carbonization process of the raw materials is more sufficient, the temperature in the material conveying bin is controlled, and the situation that the raw materials are coked too early, and generated kerosene adheres to the interior of the material conveying bin is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of carbonization furnaces, and in particular to a waste heat recovery device and method for a horizontal biomass carbonization furnace Background Technique

[0002] The annular biomass carbon and steam co-production device is an efficient and sustainable biomass energy utilization system that converts biomass into biochar and combustible gas through thermochemical conversion, while achieving the coordinated recovery of energy and resources

[0003] The patent with the patent announcement number CN203501815U relates to a waste heat recovery device for carbonized materials, including: a carbonized material channel; a plurality of heat collection boxes arranged on the outer side wall of the carbonized material channel and close to the inlet end, each heat collection box is provided with a heat conduction medium inlet and a heat conduction medium outlet; a plurality of heat pipes arranged along the length direction of the carbonized material channel, each heat pipe includes an evaporation section and a condensation section, the evaporation section is closely attached to the outer side wall of the carbonized material channel, and the condensation section extends into the heat collection box; a rotary discharge valve for controlling discharging is provided at the discharge port of the carbonized material channel; when in use, the evaporation section of the heat pipe is closely attached to the outer side wall of the carbonized material channel, and the waste heat of the carbonized material can be absorbed from the carbonized material channel, and the condensation section extends into the heat collection box, and the waste heat absorbed from the carbonized material can be transmitted to the heat conduction medium in the heat collection box for recovery and reuse, solving the problems that the existing carbonization furnace discharge cooling method wastes a large part of heat and causes thermal pollution to the environment

[0004] In the above patent, the problems that the existing carbonization furnace discharge cooling method wastes a large part of heat and causes thermal pollution to the environment are solved. However, when continuously transporting and burning biomass raw materials, it is necessary to preheat the raw materials to evaporate the moisture in the raw materials, thereby improving the effect of the subsequent carbonization process. Direct preheating with high temperature can accelerate the moisture evaporation process, but this approach will increase energy consumption, and there will be by-products such as kerosene generated in the biomass raw material conveying area, which will not only affect the raw material quality but also increase the subsequent maintenance burden Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a waste heat recovery device and method for a horizontal biomass carbonization furnace, which solves the problems raised in the above background technique

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A waste heat recovery device for a biomass horizontal carbonization furnace, comprising a horizontal carbonization furnace and a cooling bin. An insulating pipeline is fixedly installed on the surface of the horizontal carbonization furnace. One end of the insulating pipeline away from the horizontal carbonization furnace is fixedly installed with a feeding bin. A feeding hopper is fixedly installed on the top of the feeding bin. A spiral blade rotatably penetrates through one side of the feeding bin away from the insulating pipeline. It includes: a three-way pipe, the three-way pipe fixedly penetrates through the inner and outer walls of the horizontal carbonization furnace, and a valve is provided on the three-way pipe. The operator opens the valve on the three-way pipe to split the high-temperature gas. Part of the gas is directly discharged upward for collection, and the other part is discharged upward through the three-way pipe for collection. A hollow frame, the hollow frame is fixedly installed on the circumferential surface of the feeding bin, and the hollow frame is fixedly connected to the three-way pipe; a preheating device, the preheating device includes three thin rods and a U-shaped backing plate. The three thin rods fixedly penetrate through the inner and outer walls of the hollow frame, the thin rods fixedly penetrate through the inner and outer walls of the feeding bin, the U-shaped backing plate is fixedly installed inside the feeding bin, and the U-shaped backing plate is fixedly connected to one end of the thin rod; an arc-shaped piece, the arc-shaped piece is fixedly installed at the other end of the thin rod; a handle, the handle is arranged inside the hollow frame; a heat conduction pipe, the heat conduction pipe is fixedly installed on the side of the handle close to the three-way pipe. Pull the handle to move the handle in a direction away from the three-way pipe, and the movement of the handle drives the heat conduction pipe to move synchronously.

[0007] According to the above technical solution, the cooling bin is connected to the side of the horizontal carbonization furnace away from the feeding bin. The arc-shaped piece and the thin rods and U-shaped backing plate in the preheating device have high heat conduction effects. The heat conduction pipe transfers heat to the preheating device through the arc-shaped piece, so that the temperature of the preheating device rises to the preset range. The hollow frame and the handle have high heat insulation effects, and the heat conduction pipe is in contact with the inner wall of the arc-shaped piece.

[0008] According to the above technical solution, a circular ring plate is fixedly installed inside the hollow frame. The heat conduction pipe is in contact with the inner wall of the circular ring plate. The movement of the handle drives the heat conduction pipe to move synchronously. The heat conduction pipe sequentially disengages from contact with the circular ring plate and the arc-shaped piece during the movement. A natural gas ignition device is provided on the horizontal carbonization furnace. The natural gas ignition device is used for preheating and warming up the horizontal carbonization furnace in the early stage. A temperature sensor is provided on the surface of the feeding bin. The temperature sensor is used for real-time monitoring of the temperature inside the feeding bin.

[0009] According to the above technical solution, a limiting device for improving the control effect is provided on the material feeding bin, and a protection device for improving the operation safety is arranged inside the limiting device; the limiting device includes a fixed box, a T-shaped rod, a first spring, a connecting block, a retractable rod, a limiting plate and a second spring. The T-shaped rod moves to compress the first spring. When the external force disappears, the first spring restores to push the T-shaped rod back to the initial position. The fixed box is fixedly penetrated through the surface of the material feeding bin. The T-shaped rod slides through the inner and outer walls of the fixed box. A first spring is arranged between the T-shaped rod and the fixed box. The connecting block is fixedly installed on the side of the T-shaped rod away from the fixed box. The retractable rod slides through the inner and outer walls of the connecting block. The limiting plate is fixedly installed on the side of the connecting block away from the connecting block. When the limiting plate moves, it drives the retractable rod to move away from the fixed box. The movement of the retractable rod drives the connecting block to move synchronously. A second spring is arranged between the limiting plate and the connecting block.

[0010] According to the above technical solution, a rectangular groove is formed on the circumferential surface of the handle, and the limiting plate is in contact with the inner wall of the rectangular groove. When the handle accidentally moves due to an external force, the handle drives the limiting plate to move synchronously through the rectangular groove.

[0011] According to the above technical solution, the T-shaped rod is in contact with the inner wall of the fixed box. When the T-shaped rod moves, the fixed box provides necessary support for the contacting T-shaped rod to ensure that the T-shaped rod moves smoothly in the horizontal direction. Two rectangular grooves are formed on the T-shaped rod, and the two rectangular grooves are symmetrically distributed with the center line of the T-shaped rod as the vertical axis.

[0012] According to the above technical solution, the protection device includes a mounting frame, a round rod, a contact plate and a rubber plate. The mounting frame is fixedly installed inside the fixed box. The round rod is fixedly penetrated through the surface of the T-shaped rod. When the T-shaped rod moves, the T-shaped rod drives the round rod to move away from the rubber plate. The contact plate is fixedly installed on the side of the round rod away from the T-shaped rod. The rubber plate is fixedly installed on the inner wall of the mounting frame. A groove is formed on the side of the rubber plate close to the contact plate, and the contact plate is in contact with the groove.

[0013] According to the above technical solution, a rotating shaft is fixedly installed inside the mounting frame. A rotating plate is rotatably installed on the circumferential surface of the rotating shaft. Elastic pieces are arranged on the surface of the rotating plate. One end of the elastic piece away from the rotating plate is fixedly connected to the inner wall of the mounting frame. The deformed elastic pieces exert a continuous reaction force on the rotating plate to keep the rotating plate in close contact with the rectangular groove. The rotating plate is in contact with the inner wall of the rectangular groove.

[0014] A usage method of a waste heat recovery device for a biomass horizontal carbonization furnace. Using the above-mentioned waste heat recovery device for a biomass horizontal carbonization furnace includes the following steps: Step 1: The biomass raw material continuously enters the material conveying bin through the feeding hopper. After entering the material conveying bin, the biomass raw material contacts the U-shaped backing plate in the preheating device. Step 2: The operator starts the motor to drive the spiral blade to rotate. The spiral blade pushes the biomass raw material towards the horizontal carbonization furnace. During the movement, the biomass raw material separates from the U-shaped backing plate. Step 3: Guided by the heat-insulating pipeline, the biomass raw material finally uniformly enters the horizontal carbonization furnace under the push of the spiral blade. Step 4: The operator ignites the biomass raw material through the natural gas ignition device. The high-temperature gas generated during the combustion is discharged upward for collection, while the generated biochar enters the cooling bin.

[0015] The present invention provides a waste heat recovery device for a horizontal biomass carbonization furnace, which has the following beneficial effects: (1) For this waste heat recovery device of the horizontal biomass carbonization furnace, the heat conduction pipe slides out of the hollow frame to complete disassembly. Through standardized operation, the heat conduction pipe can be quickly withdrawn for replacement within a preset time, shortening the replacement time, thereby maintaining the stable use of the preheating device. At the same time, the heat conduction pipe transfers heat to the preheating device, and the moisture in the biomass raw material is evaporated through the preheating device, ensuring a more sufficient carbonization process of the raw material and controlling the temperature in the material conveying bin to prevent premature coking of the raw material and the generation of kerosene adhering to the inside of the material conveying bin. (2) For this waste heat recovery device of the horizontal biomass carbonization furnace, after the external force disappears, the first spring restores and pushes the T-shaped rod to return to the initial position. Through the synchronous movement of the limit plate and the grip, it can prevent the accidental displacement of the grip from affecting the contact area between the heat conduction pipe and the high-temperature gas in the three-way pipe, thereby reducing the adverse effects caused by accidental touch. At the same time, when the limit plate is completely separated from the rectangular groove, the limit state is released. By setting the T-shaped rod and the retractable rod, the flexibility of adjusting the limit plate is improved, thereby improving the convenience of operation and enhancing the safety of operation through limiting. (3) For this waste heat recovery device of the horizontal biomass carbonization furnace, the rubber plate and the contact plate are in close contact and generate frictional resistance. By slowing down the speed of the first spring's restoration, it prevents the impact and vibration caused by the rapid rebound of the first spring, ensuring a more stable movement of the heat conduction pipe. At the same time, the rotating plate and the rectangular groove remain in close contact. Through the close fit of the rotating plates on both sides and the T-shaped rod, the fixing effect of the T-shaped rod at the specified position is improved, thereby enhancing the stability of the heat conduction pipe during operation. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the material conveying bin of the present invention; Figure 3 It is a schematic diagram of the position structure of the preheating device of the present invention; Figure 4Schematic diagram of the overall structure of the hollow frame of the present invention; Figure 5 Schematic diagram of the internal structure of the hollow frame of the present invention; Figure 6 Schematic diagram of the overall structure of the locking device of the present invention; Figure 7 Schematic diagram of the internal structure of the fixed box of the present invention; Figure 8 Schematic diagram of the internal structure of the carrying frame of the present invention; Figure 9 Schematic diagram of the structure of the T-shaped rod of the present invention.

[0017] In the figure: 1, horizontal carbonization furnace; 2, heat insulation pipeline; 3, feeding bin; 4, feeding hopper; 5, spiral blade; 6, three-way pipe; 7, hollow frame; 8, preheating device; 9, arc-shaped piece; 10, handle; 11, heat conduction pipe; 12, circular ring plate; 13, natural gas ignition device; 141, fixed box; 142, T-shaped rod; 143, first spring; 144, connecting block; 145, retractable rod; 146, limiting plate; 147, second spring; 151, carrying frame; 152, round rod; 153, contact plate; 154, rubber plate; 155, rotating shaft; 156, rotating plate; 157, elastic piece. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] Please refer to Figures 1 - 5, an embodiment of the present invention is: a waste heat recovery device for a biomass horizontal carbonization furnace, including a horizontal carbonization furnace 1 and a cooling bin. An insulating pipeline 2 is fixedly installed on the surface of the horizontal carbonization furnace 1. One end of the insulating pipeline 2 far from the horizontal carbonization furnace 1 is fixedly installed with a feeding bin 3. A feeding hopper 4 is fixedly installed on the top of the feeding bin 3. A spiral blade 5 rotatably penetrates through one side of the feeding bin 3 far from the insulating pipeline 2, including: a tee pipe 6, the tee pipe 6 fixedly penetrates through the inner and outer walls of the horizontal carbonization furnace 1, a valve is arranged on the tee pipe 6, a hollow frame 7, the hollow frame 7 is fixedly installed on the circumferential surface of the feeding bin 3, and the hollow frame 7 is fixedly connected with the tee pipe 6; a preheating device 8, the preheating device 8 includes three thin rods and a U-shaped backing plate. The three thin rods fixedly penetrate through the inner and outer walls of the hollow frame 7, the thin rods fixedly penetrate through the inner and outer walls of the feeding bin 3, the U-shaped backing plate is fixedly installed inside the feeding bin 3, and the U-shaped backing plate is fixedly connected with one end of the thin rods; an arc-shaped piece 9, the arc-shaped piece 9 is fixedly installed at the other end of the thin rods; a handle 10, the handle 10 is arranged inside the hollow frame 7; a heat conduction pipe 11, the heat conduction pipe 11 is fixedly installed on the side of the handle 10 close to the tee pipe 6. By evaporating the moisture in the biomass raw material through the preheating device 8, the carbonization process of the raw material is ensured to be more sufficient.

[0020] The cooling bin is connected to the side of the horizontal carbonization furnace 1 far from the feeding bin 3. The arc-shaped piece 9 and the thin rods and U-shaped backing plate in the preheating device 8 have high heat conduction effects, the hollow frame 7 and the handle 10 have high heat insulation effects, the heat conduction pipe 11 contacts the inner wall of the arc-shaped piece 9, controls the temperature inside the feeding bin 3, and prevents the raw material from coking prematurely and generating kerosene that adheres to the inside of the feeding bin 3.

[0021] A circular ring plate 12 is fixedly installed inside the hollow frame 7, the heat conduction pipe 11 contacts the inner wall of the circular ring plate 12. A natural gas ignition device 13 is arranged on the horizontal carbonization furnace 1, and the natural gas ignition device 13 is used for preheating and heating up the horizontal carbonization furnace 1 in the early stage. A temperature sensor is arranged on the surface of the feeding bin 3, and the temperature sensor is used for real-time monitoring of the temperature inside the feeding bin 3. Through standardized operation, the heat conduction pipe 11 can be quickly drawn out for replacement within a preset time, shortening the replacement time, thereby maintaining the stable use of the preheating device 8.

[0022] A using method of a waste heat recovery device for a biomass horizontal carbonization furnace, using the above-mentioned waste heat recovery device for a biomass horizontal carbonization furnace, includes the following steps: Step 1: Biomass raw materials continuously enter the feeding bin 3 through the feeding hopper 4. After entering the feeding bin 3, the biomass raw materials contact the U-shaped backing plate in the preheating device 8; Step 2: The operator starts the motor to drive the spiral blade 5 to rotate. The spiral blade 5 pushes the biomass raw materials to move towards the horizontal carbonization furnace 1. During the movement, the biomass raw materials are separated from the U-shaped backing plate; Step 3: The biomass raw materials are guided by the heat-insulating pipeline 2 and finally uniformly enter the horizontal carbonization furnace 1 under the pushing of the spiral blades 5; Step 4: The operator ignites the biomass raw materials through the natural gas ignition device 13. The high-temperature gas generated during the combustion process is discharged upward for collection, while the generated biochar enters the cooling bin.

[0023] When this embodiment works, when the biomass raw materials are continuously transported and burned, the operator opens the valve on the three-way pipe 6 to divert the high-temperature gas. Part of the gas is directly discharged upward for collection, and the other part is discharged upward through the three-way pipe 6 for collection; the high-temperature gas in the three-way pipe 6 contacts the heat conduction pipe 11 during the discharge process and, through heat exchange, raises the temperature of the heat conduction pipe 11. The heat conduction pipe 11 transfers the heat to the preheating device 8 through the arc-shaped piece 9, raising the temperature of the preheating device 8 to the preset range; during this process, the U-shaped backing plate in the preheating device 8 preheats the contacting biomass raw materials, evaporating the moisture in the biomass raw materials. The generated water vapor is discharged from the top of the feeding bin 3. Evaporating the moisture in the biomass raw materials through the preheating device 8 ensures a more sufficient carbonization process of the raw materials and controls the temperature in the feeding bin 3 to prevent the raw materials from coking prematurely and generating kerosene that adheres to the inside of the feeding bin 3. When the temperature sensor detects that the temperature in the feeding bin 3 exceeds the preset range, the operator immediately closes the valve on the three-way pipe 6, cutting off the path of the high-temperature gas flowing into the three-way pipe 6. After closing the valve, the heat conduction pipe 11 gradually cools down due to stopping receiving the high-temperature gas, and the temperature of the preheating device 8 then drops back to the safe range to prevent the biomass raw materials from overheating and coking; when the operator needs to replace the heat conduction pipe 11, confirm that the valve is fully closed, then wear high-temperature resistant gloves and protective gear, and pull the handle 10 to move the handle 10 away from the three-way pipe 6. The movement of the handle 10 drives the heat conduction pipe 11 to move synchronously. The heat conduction pipe 11 sequentially disengages from the circular ring plate 12 and the arc-shaped piece 9 during the movement and finally slides out of the hollow frame 7 to complete the disassembly. Through standardized operation, the heat conduction pipe 11 can be quickly withdrawn for replacement within the preset time, shortening the replacement time, thereby maintaining the stable use of the preheating device 8.

[0024] Please refer to Figures 1 - 9, on the basis of the above embodiments, in another embodiment of the present invention, a limiting device for improving the control effect is provided on the feeding bin 3, and a protection device for improving the operation safety is arranged in the limiting device; the limiting device includes a fixed box 141, a T-shaped rod 142, a first spring 143, a connecting block 144, a retractable rod 145, a limiting plate 146 and a second spring 147. The fixed box 141 is fixedly penetrated through the surface of the feeding bin 3. The T-shaped rod 142 slides through the inner and outer walls of the fixed box 141. A first spring 143 is arranged between the T-shaped rod 142 and the fixed box 141. The connecting block 144 is fixedly installed on the side of the T-shaped rod 142 away from the fixed box 141. The retractable rod 145 slides through the inner and outer walls of the connecting block 144. The limiting plate 146 is fixedly installed on the side of the connecting block 144 away from the connecting block 144. A second spring 147 is arranged between the limiting plate 146 and the connecting block 144. By setting the T-shaped rod 142 and the retractable rod 145, the flexibility when adjusting the limiting plate 146 is improved, thereby improving the convenience of operation, and the operation safety is improved by limiting.

[0025] A rectangular groove is formed on the circumferential surface of the handle 10. The limiting plate 146 contacts the inner wall of the rectangular groove. By synchronously moving the limiting plate 146 and the handle 10, the accidental displacement of the handle 10 can be prevented, thereby reducing the adverse effects caused by accidental touch.

[0026] The T-shaped rod 142 contacts the inner wall of the fixed box 141. Two rectangular grooves are formed on the T-shaped rod 142 and are symmetrically distributed with the center line of the T-shaped rod 142 as the vertical axis. By providing support for the T-shaped rod 142, it is ensured that the T-shaped rod 142 can move smoothly along the preset direction, thereby ensuring the correct triggering of the limiting effect.

[0027] The protection device includes a mounting frame 151, a round rod 152, a contact plate 153 and a rubber plate 154. The mounting frame 151 is fixedly installed inside the fixed box 141. The round rod 152 is fixedly penetrated through the surface of the T-shaped rod 142. The contact plate 153 is fixedly installed on the side of the round rod 152 away from the T-shaped rod 142. The rubber plate 154 is fixedly installed on the inner wall of the mounting frame 151. A groove is formed on the side of the rubber plate 154 close to the contact plate 153. The contact plate 153 contacts the groove. By slowing down the speed of the first spring 143 when it restores, the impact and vibration generated by the rapid rebound of the first spring 143 are prevented, ensuring that the movement of the heat conduction tube 11 is smoother.

[0028] Inside the mounting frame 151, a rotating shaft 155 is fixedly installed. On the circumferential surface of the rotating shaft 155, a rotating plate 156 is rotatably installed. On the surface of the rotating plate 156, a spring piece 157 is provided. One end of the spring piece 157 away from the rotating plate 156 is fixedly connected to the inner wall of the mounting frame 151. The rotating plate 156 contacts the inner wall of the rectangular groove. Through the close fit of the rotating plates 156 on both sides and the T-shaped rod 142, the fixing effect of the T-shaped rod 142 at the specified position is improved, thereby improving the stability of the heat conducting pipe 11 during operation.

[0029] During the operation of this embodiment, when the grip 10 moves accidentally due to an external force, the grip 10 drives the limiting plate 146 to move synchronously through the rectangular groove. The movement of the limiting plate 146 drives the retractable rod 145 to move away from the fixed box 141. The movement of the retractable rod 145 drives the connecting block 144 to move synchronously. The movement of the connecting block 144 drives the T-shaped rod 142 to move away from the fixed box 141. The movement of the T-shaped rod 142 compresses the first spring 143. When the external force disappears, the first spring 143 restores and pushes the T-shaped rod 142 back to the initial position. During the reset process, the limiting plate 146 moves towards the starting position together, thereby pushing the grip 10 back to the starting position. By the synchronous movement of the limiting plate 146 and the grip 10, it is possible to prevent the accidental displacement of the grip 10 from affecting the contact area between the heat conducting pipe 11 and the high-temperature gas in the three-way pipe 6, thereby reducing the adverse effects caused by accidental touch. Before the operator disassembles the heat conducting pipe 11, it is necessary to first release the contact between the limiting plate 146 and the rectangular groove. First, horizontally push the limiting plate 146 towards the connecting block 144. The movement of the limiting plate 146 drives the retractable rod 145 to move away from the grip 10. The retractable rod 145 provides support for the limiting plate 146 to ensure the stable movement of the retractable rod 145 along the parallel direction. The moving retractable rod 145 compresses the second spring 147. When the limiting plate 146 and the rectangular groove are completely separated, the limiting state is released. At this time, the operator can perform the disassembly operation of the heat conducting pipe 11. By setting the T-shaped rod 142 and the retractable rod 145, the flexibility of adjusting the limiting plate 146 is improved, thereby improving the convenience of operation, and the safety of operation is improved through limiting; When the T-shaped rod 142 moves, the T-shaped rod 142 will drive the round rod 152 to move in the direction away from the rubber plate 154, and the movement of the round rod 152 will drive the contact plate 153 to move in the direction away from the rubber plate 154. The contact plate 153 is separated from the groove of the rubber plate 154 during the movement. At this time, the rubber plate 154, which has been deformed due to the extrusion, automatically returns to its original state; when the T-shaped rod 142 is reset, the round rod 152 and the contact plate 153 move in the direction of the rubber plate 154. The contact plate 153 gradually contacts the rubber plate 154 during the movement and squeezes the groove of the rubber plate 154 to deform it. The deformed rubber plate 154 is in close contact with the contact plate 153 under the action of its own elasticity and generates friction resistance. The friction resistance can slow down the speed of the contact plate 153 resetting, thereby controlling the recovery process of the No. 1 spring 143. By slowing down the speed of the No. 1 spring 143 when it is restored, the rubber plate 154 can be prevented from being deformed. The impact and vibration caused by the rapid rebound of the No. 1 spring 143 are stopped, ensuring that the movement of the heat pipe 11 is more stable. At the same time, the movement of the T-shaped rod 142 causes its rectangular groove to disengage from the rotating plate 156. At this time, the compressed spring piece 157 recovers and pushes the rotating plate 156 to rotate to the specified position. When the T-shaped rod 142 is reset and its rectangular groove and the rotating plate 156 are re-contacted, the T-shaped rod 142 applies pressure to the rotating plate 156, forcing the rotating plate 156 to rotate in the direction of the spring piece 157, thereby compressing the spring piece 157 again. The deformed spring piece 157 applies a continuous reaction force to the rotating plate 156, so that the rotating plate 156 and the rectangular groove remain in close contact, thereby improving the stability of the T-shaped rod 142 at the specified position. The rotating plates 156 and the T-shaped rod 142 on both sides are closely fitted, and the fixing effect of the T-shaped rod 142 at the specified position is improved, thereby improving the stability of the heat pipe 11 during operation.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for a horizontal biomass carbonization furnace, comprising a horizontal carbonization furnace (1) and a cooling bin. A heat insulation pipeline (2) is fixedly installed on the surface of the horizontal carbonization furnace (1). One end of the heat insulation pipeline (2) away from the horizontal carbonization furnace (1) is fixedly installed with a feeding bin (3). A feeding hopper (4) is fixedly installed on the top of the feeding bin (3). A spiral blade (5) rotatably penetrates through one side of the feeding bin (3) away from the heat insulation pipeline (2), and it is characterized in that, Including: A three-way pipe (6) fixedly penetrating through the inner and outer walls of the horizontal carbonization furnace (1), and a valve is arranged on the three-way pipe (6); A hollow frame (7) fixedly installed on the circumferential surface of the feeding bin (3), and the hollow frame (7) is fixedly connected to the three-way pipe (6); A preheating device (8), the preheating device (8) includes three thin rods and a U-shaped backing plate. The three thin rods fixedly penetrate through the inner and outer walls of the hollow frame (7), the thin rods fixedly penetrate through the inner and outer walls of the feeding bin (3), the U-shaped backing plate is fixedly installed inside the feeding bin (3), and the U-shaped backing plate is fixedly connected to one end of the thin rod; An arc-shaped piece (9) fixedly installed at the other end of the thin rod; A handle (10) arranged inside the hollow frame (7); A heat conduction pipe (11) fixedly installed on the side of the handle (10) close to the three-way pipe (6).

2. The waste heat recovery device for a biomass horizontal carbonization furnace according to claim 1, characterized in that: The cooling bin is connected to the side of the horizontal carbonization furnace (1) away from the feeding bin (3), and the heat conduction pipe (11) is in contact with the inner wall of the arc-shaped piece (9); Wherein, a limiting device for improving the control effect is arranged on the feeding bin (3), and a protection device for improving the operation safety is arranged inside the limiting device.

3. The waste heat recovery device of a biomass horizontal carbonization furnace according to claim 2, characterized in that: A circular ring plate (12) is fixedly installed inside the hollow frame (7), the heat conduction pipe (11) is in contact with the inner wall of the circular ring plate (12), a natural gas ignition device (13) is arranged on the horizontal carbonization furnace (1), the natural gas ignition device (13) is used for preheating and heating up the horizontal carbonization furnace (1) in the early stage, a temperature sensor is arranged on the surface of the feeding bin (3), and the temperature sensor is used for monitoring the temperature inside the feeding bin (3) in real time.

4. A waste heat recovery device for a biomass horizontal carbonization furnace according to claim 3, characterized in that: The limiting device includes a fixed box (141), a T-shaped rod (142), a first spring (143), a connecting block (144), a retractable rod (145), a limiting plate (146) and a second spring (147). The fixed box (141) fixedly penetrates through the surface of the feeding bin (3), the T-shaped rod (142) slides through the inner and outer walls of the fixed box (141), a first spring (143) is arranged between the T-shaped rod (142) and the fixed box (141), the connecting block (144) is fixedly installed on the side of the T-shaped rod (142) away from the fixed box (141), the retractable rod (145) slides through the inner and outer walls of the connecting block (144), the limiting plate (146) is fixedly installed on the side of the connecting block (144) away from the connecting block (144), and a second spring (147) is arranged between the limiting plate (146) and the connecting block (144).

5. The waste heat recovery device of a biomass horizontal carbonization furnace according to claim 4, characterized in that: Rectangular grooves are formed on the circumferential surface of the handle (10), and the limiting plate (146) is in contact with the inner wall of the rectangular grooves.

6. The waste heat recovery device of a biomass horizontal carbonization furnace according to claim 5, characterized in that: The T-shaped rod (142) is in contact with the inner wall of the fixed box (141), and two rectangular grooves are formed on the T-shaped rod (142), and the two rectangular grooves are symmetrically distributed with the center line of the T-shaped rod (142) as the vertical axis.

7. The waste heat recovery device of a biomass horizontal carbonization furnace according to claim 6, characterized in that: The protection device includes a mounting frame (151), a round rod (152), a contact plate (153) and a rubber plate (154). The mounting frame (151) is fixedly installed inside the fixed box (141). The round rod (152) is fixedly penetrated through the surface of the T-shaped rod (142). The contact plate (153) is fixedly installed on the side of the round rod (152) away from the T-shaped rod (142). The rubber plate (154) is fixedly installed on the inner wall of the mounting frame (151). A groove is formed on the side of the rubber plate (154) close to the contact plate (153), and the contact plate (153) is in contact with the groove.

8. A waste heat recovery device for a biomass horizontal carbonization furnace according to claim 7, characterized in that: A rotating shaft (155) is fixedly installed inside the mounting frame (151). A rotating plate (156) is rotatably installed on the circumferential surface of the rotating shaft (155). Elastic pieces (157) are arranged on the surface of the rotating plate (156). One end of the elastic piece (157) away from the rotating plate (156) is fixedly connected to the inner wall of the mounting frame (151), and the rotating plate (156) is in contact with the inner wall of the rectangular groove.

9. A method for using a waste heat recovery device of a biomass horizontal carbonization furnace, using the waste heat recovery device of a biomass horizontal carbonization furnace described in claim 8, characterized in that, It includes the following steps: Step 1: Biomass raw materials continuously enter the feeding bin (3) through the feeding hopper (4). The biomass raw materials after entering the feeding bin (3) are in contact with the U-shaped backing plate in the preheating device (8). Step 2: The operator starts the motor to drive the spiral blade (5) to rotate. The spiral blade (5) pushes the biomass raw materials towards the horizontal carbonization furnace (1). During the movement, the biomass raw materials are separated from the U-shaped backing plate. Step 3: Guided by the heat insulation pipeline (2), the biomass raw materials finally uniformly enter the horizontal carbonization furnace (1) under the push of the spiral blade (5). Step 4: The operator ignites the biomass raw materials through the natural gas ignition device (13). The high-temperature gas generated during the combustion process is discharged upward for collection, and the generated biochar enters the cooling bin.

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