A biomass pyrolysis co-production of tar and fuel gas system

Abstract

The application discloses a biomass pyrolysis system for co-production of tar and fuel gas, which comprises a casing, a crushing mechanism and a crushing cylinder, the crushing mechanism is rotatably installed in the casing, the crushing cylinder is fixedly installed on the bottom of the crushing mechanism, the crushing cylinder is coaxially arranged with the casing, a crushing space is formed between the outer wall of the crushing cylinder and the inner wall of the casing, a feeding port is formed in the top of the casing, and an outer discharging port is formed in the bottom of the casing; a driving assembly is installed on one side of the casing, the output end of the driving assembly is drivingly connected with the crushing mechanism, the driving assembly drives the crushing mechanism to rotate in the casing, and a fixed gear ring is coaxially and fixedly installed in the casing. The biomass raw material can be crushed through the crushing mechanism, the biomass raw material can be finely processed to the maximum extent during crushing, and the pyrolysis speed can be improved during pyrolysis.

Description

A biomass pyrolysis system for co-producing tar and fuel gas Technical Field

[0001] This invention relates to the field of biomass pyrolysis technology. Specifically, it relates to a biomass pyrolysis system for co-producing tar and fuel gas. Background Technology

[0002] Biomass is a renewable energy source, and my country has abundant biomass energy resources. Developing and utilizing these biomass energy sources can help address energy shortages. Biomass contains fiber, especially biomass with long fibers, which needs to be pulverized before pyrolysis. Most existing technologies directly pulverize biomass raw materials into granules, which requires a long heating time and results in a slow pyrolysis rate. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a biomass pyrolysis co-production system for tar and gas that can improve the crushing effect of biomass raw materials and increase the pyrolysis rate.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a biomass pyrolysis co-production system for tar and gas, comprising a housing, a crushing mechanism, and a crushing cylinder. The crushing mechanism is rotatably installed inside the housing, and the crushing cylinder is fixedly installed on the bottom of the crushing mechanism. The crushing cylinder is coaxially arranged with the housing, and a crushing space is formed between the outer wall of the crushing cylinder and the inner wall of the housing. A feed inlet is provided on the top of the housing, and an external discharge outlet is provided on the bottom of the housing. A drive assembly is installed on one side of the housing, and the output end of the drive assembly is drivenly connected to the crushing mechanism. The drive assembly drives the crushing mechanism to rotate inside the housing. A fixed gear ring is coaxially fixedly installed inside the housing, and a gear is fixedly installed on the power input shaft of the crushing mechanism, the gear meshing with the fixed gear ring.

[0005] The aforementioned biomass pyrolysis co-production system for tar and gas includes a pulverizing mechanism comprising a support frame and a first pressure roller, a second pressure roller, a first pulverizing component, and a second pulverizing component arranged parallel to each other and in a clockwise direction. The first and second pressure rollers are rotatably mounted side-by-side on the upper part of the support frame, and the first and second pulverizing components are rotatably mounted side-by-side on the lower part of the support frame. A sprocket is fixedly mounted on the first end of the first pressure roller and the first end of the first pulverizing component, and the first pressure roller and the first pulverizing component are connected by a chain drive. A sprocket is also fixedly mounted on the second end of the second pressure roller and the second pulverizing component, and the second pressure roller and the second pulverizing component are connected by a chain drive. A rotating support ring is coaxially fixedly mounted inside the support frame, and a drive gear ring is fixedly mounted on the top of the support frame. The drive gear ring is rotatably mounted on the rotating support ring, and the drive end of the drive component is drivenly connected to the drive gear ring. Gears are fixedly mounted on the second end of the first pressure roller and the first end of the second pressure roller, and the gears mesh with a fixed gear ring. The bottom end of the support frame is fixedly connected to the top end of the pulverizing cylinder.

[0006] In the aforementioned biomass pyrolysis co-production system for tar and gas, the sprocket diameters at the ends of the first and second pressure rollers are the same, and the sprocket diameters at the ends of the first and second crushing components are the same; the sprocket diameters at the ends of the first and second pressure rollers are larger than the sprocket diameters at the ends of the first and second crushing components; the drive assembly includes a motor and an output gear mounted on the motor output shaft, the output gear being meshed and driven by the drive gear ring.

[0007] In the aforementioned biomass pyrolysis co-production system for tar and gas, the distance between the first crushing component and the second pressure roller is equal to the distance between the second crushing component and the first pressure roller; the distance between the first pressure roller and the second pressure roller is greater than the distance between the second crushing component and the first pressure roller.

[0008] The aforementioned biomass pyrolysis co-production system for tar and fuel gas has the same structure for the first and second pulverizing components. The second pulverizing component includes a central shaft, a drive cylinder, an external pressure cylinder, a crushing component, and a dispersing component. The central shaft is coaxially disposed within the drive cylinder, and the external pressure cylinder is coaxially sleeved on the drive cylinder. A central support frame is fixedly installed in the middle of the central shaft, and the end of the central support frame is fixedly connected to the drive cylinder. Both ends of the central shaft are splined shafts, and splined cylinders are drivenly connected to the splined shafts at both ends of the central shaft. An end support frame is fixedly installed, with the other end of the end support frame fixedly connected to the outer pressure cylinder. Both ends of the central shaft are rotatably mounted on the support frame, and the sprocket is installed on the end of the central shaft. A first push block and a second push block are respectively installed on both ends of the outer pressure cylinder. The first push block and the second push block are respectively located on both sides of the central shaft. The first push block and the second push block gradually become thinner from the middle to both ends. A first guide wheel and a second guide wheel are respectively installed on both sides of the support frame. The crushing component and the dispersing component are spaced apart and installed on the outer pressure cylinder.

[0009] The aforementioned biomass pyrolysis co-production system for tar and fuel gas includes a compaction component comprising a compaction block. A compaction groove is formed on the side wall of the compaction block away from the axis of the outer pressure cylinder. A connecting shaft is fixedly installed on the bottom end of the compaction block. The other end of the connecting shaft passes through the outer pressure cylinder and is rotatably connected to it. A connecting plate is fixedly connected to the end of the connecting shaft. A drive pin is fixedly installed on the end of the connecting plate. A drive groove is formed on the outer wall of the drive cylinder along its circumference. The end of the drive pin is inserted into the drive groove.

[0010] The above-mentioned biomass pyrolysis co-production tar and gas system includes a dispersion component comprising a blade, a connecting shaft fixedly connected to the bottom of the blade, the other end of the connecting shaft passing through an external pressure cylinder and rotatably connected to the external pressure cylinder, a connecting plate fixedly installed on the end of the connecting shaft, a drive pin fixedly installed on the end of the connecting plate, a drive groove being formed along the circumference of the outer wall of the drive cylinder, and the end of the drive pin being inserted into the drive groove.

[0011] In the aforementioned biomass pyrolysis co-production system for tar and fuel gas, the outer diameter of the crushing cylinder gradually increases from top to bottom. A heating plate is installed on the inner wall of the crushing cylinder, and a heating plate is also installed on the outer wall of the casing. An inner discharge port is installed at the bottom of the crushing cylinder, corresponding to the outer discharge port. A gas guide groove is coaxially arranged on the top of the crushing cylinder, and a through hole communicating with the interior of the crushing cylinder is opened on the bottom wall of the gas guide groove. An annular cover plate is installed on the gas guide groove, and a gas pipe is installed on the annular cover plate. One end of the gas pipe is inserted into the gas guide groove, and the other end of the gas pipe extends out of the casing. An air inlet pipe is provided on the side wall of the crushing cylinder, with one end communicating with the crushing space and the other end communicating with the interior of the crushing cylinder.

[0012] In the aforementioned biomass pyrolysis co-production system for tar and fuel gas, the air inlet pipe extends gradually upward from one end connected to the crushing cylinder to its middle section, and then bends downward from the middle section to its other end.

[0013] In the above-mentioned biomass pyrolysis co-production tar and gas system, a feed guide trough is coaxially fixedly installed on the inner side wall of the casing, and the bottom of the feed guide trough is inserted between the crushing cylinder and the crushing cylinder.

[0014] The technical solution of the present invention achieves the following beneficial technical effects:

[0015] 1. This invention, by setting up a pulverizing mechanism, can pulverize biomass raw materials, and during pulverization, it can refine the biomass raw materials to the greatest extent, thereby increasing the pyrolysis rate during pyrolysis; by setting up a rotatable first pressure roller and a second pressure roller, the biomass raw materials are first twisted and crushed during pulverization, and then pass through the first pulverizing component and the second pulverizing component. Since the rotation speed of the pulverizing component is higher than that of the pressure roller, the pulverizing component can continuously crush and refine the biomass raw materials, maximizing the pulverization effect; since the upper and lower corresponding pressure rollers and the pulverizing component rotate in opposite directions, harder biomass raw materials, after being crushed by the two pressure rollers and moving downwards, can be pushed upwards by the pulverizing component, continuously subjected to reverse compression, causing the biomass raw materials to bend and scrape.

[0016] 2. This invention, by setting up a pulverizing component, enables the outer pressure cylinder to repeatedly move axially during rotation, applying a kneading effect to the biomass raw material and promoting fiber dispersion. By setting up a dispersion component, the blades continuously cut the fiber bundles during rotation; furthermore, the blades can oscillate during rotation, thereby improving the cutting effect. By setting up a crushing component, the crushing block can apply high local pressure to promote fiber dispersion; the crushing block can oscillate during rotation, and in conjunction with the crushing groove, it can apply overall lateral kneading and localized repeated torsional kneading to the fiber bundles. The above three effects work together to not only achieve overall kneading and cutting of biomass to promote pulverization, but also to apply localized pressure to further promote fiber refinement and pulverization, thereby improving the pulverization effect and increasing the pyrolysis rate.

[0017] 3. This invention, by setting up a crushing cylinder and a heating plate, enables the fibers to be continuously crushed and simultaneously heated and pyrolyzed after falling into the crushing space. Due to continuous contact with the heat source, the pyrolysis effect and efficiency can be improved, making the pyrolysis more thorough. By setting up an air inlet pipe, pyrolysis gas can be extracted at the same time as pyrolysis, thereby accelerating the extraction speed of pyrolysis gas and preventing the bottom layer of pyrolysis from failing to release. Attached Figure Description

[0018] Figure 1 is a schematic cross-sectional view of the present invention;

[0019] Figure 2 is an enlarged structural schematic diagram of point A in Figure 1 of the present invention;

[0020] Figure 3 is a schematic diagram of the crushing mechanism of the present invention;

[0021] Figure 4 is a schematic diagram of the crushing mechanism of the present invention;

[0022] Figure 5 is a schematic cross-sectional view of the second crushing component of the present invention;

[0023] Figure 6 is a three-dimensional structural schematic diagram of the second crushing component of the present invention;

[0024] Figure 7 is a schematic cross-sectional view of the rolling component of the present invention;

[0025] Figure 8 is a schematic cross-sectional view of the dispersion component of the present invention.

[0026] The reference numerals in the figure are as follows: 1-machine housing; 2-drive assembly; 201-motor; 202-output gear; 3-crushing mechanism; 301-support frame; 302-drive gear ring; 303-first pressure roller; 304-second pressure roller; 305-first crushing assembly; 306-second crushing assembly; 307-gear; 308-sprocket; 309-central shaft; 310-middle support frame; 311-drive cylinder; 312-spline cylinder; 313-end support frame; 314-outer pressure cylinder; 315-crushing component. 316-Dispersion component; 317-First guide wheel; 318-First push block; 319-Second guide wheel; 320-Second push block; 321-Connecting shaft; 322-Connecting plate; 323-Drive pin; 324-Drive groove; 325-Crushing block; 326-Crushing groove; 327-Blade; 4-Guide groove; 5-Crushing cylinder; 6-Heating plate; 7-Air inlet pipe; 8-Air guide groove; 9-Air pipe; 10-External discharge port; 11-Internal discharge port; 12-Annular cover plate; 13-Rotation support ring; 14-Fixed gear ring. Detailed Implementation

[0027] This embodiment of a biomass pyrolysis co-production system for tar and fuel gas, as shown in Figures 1 and 3, includes a housing 1, a crushing mechanism 3, and a crushing cylinder 5. The crushing mechanism 3 is rotatably mounted inside the housing 1. The crushing cylinder 5 is fixedly mounted on the bottom of the crushing mechanism 3. The crushing cylinder 5 is coaxially arranged with the housing 1, and a crushing space is formed between the outer wall of the crushing cylinder 5 and the inner wall of the housing 1. A guide groove 4 is coaxially fixedly mounted on the inner side wall of the housing 1. The bottom of the guide groove 4 is inserted into the crushing cylinder. Between the cylinder 5 and the crushing cylinder 5, a feed inlet is provided on the top of the housing 1, and an external discharge outlet 10 is provided on the bottom of the housing 1. A drive assembly 2 is installed on one side of the housing 1, and the output end of the drive assembly 2 is drivenly connected to the crushing mechanism 3. The drive assembly 2 drives the crushing mechanism 3 to rotate inside the housing 1. A fixed gear ring 14 is coaxially fixedly installed inside the housing 1, and a gear 307 is fixedly installed on the power input shaft of the crushing mechanism 3. The gear 307 meshes with the fixed gear ring 14. By setting the crushing mechanism 3, biomass raw materials can be crushed, and during crushing, the biomass raw materials can be refined to the maximum extent, thereby improving the pyrolysis rate during pyrolysis.

[0028] As shown in Figures 3-4, the crushing mechanism 3 includes a support frame 301 and a first pressure roller 303, a second pressure roller 304, a first crushing component 305, and a second crushing component 306 arranged parallel to each other and in a clockwise direction. The first pressure roller 303 and the second pressure roller 304 are rotatably mounted side-by-side on the upper part of the support frame 301, and the first crushing component 305 and the second crushing component 306 are rotatably mounted side-by-side on the lower part of the support frame 301. A sprocket 308 is fixedly mounted on the first end of the first pressure roller 303 and the first end of the first crushing component 305, and the first pressure roller 303 and the first crushing component 305 are connected by a chain drive. A sprocket 308 is also fixedly mounted on the second end of the second pressure roller 304 and the second crushing component 306, and the second pressure roller 304 and the second crushing component 306 are connected by a chain drive. A rotary support ring 13 is coaxially fixedly installed inside the support frame 301. A drive gear ring 302 is fixedly installed at the top of the support frame 301. The drive gear ring 302 is rotatably mounted on the rotary support ring 13. The drive end of the drive assembly 2 is drivenly connected to the drive gear ring 302. Gears 307 are fixedly installed on the second end of the first pressure roller 303 and the first end of the second pressure roller 304. In order to ensure that the meshing angle between the gear 307 and the fixed gear ring 14 is correct, an angle transmission box can be installed on the ends of the first pressure roller 303 and the second pressure roller 304. The angle transmission box is fixed on the support frame 301. One end of the angle transmission box is connected to the end of the pressure roller, and the other end is connected to the gear 307. By changing the transmission angle, the meshing angle is ensured to be correct. The gear 307 meshes with the fixed gear ring 14. The bottom end of the support frame 301 is fixedly connected to the top end of the crushing cylinder 5. By setting a first pressure roller 303 and a second pressure roller 304 that can rotate, the biomass raw material can be twisted and crushed during crushing. Since the upper and lower corresponding pressure rollers and crushing components rotate in opposite directions, the harder biomass raw material can be pushed upward by the crushing components when it moves downward after being crushed by the two pressure rollers. The reverse compression continuously causes the biomass raw material to bend and be scraped.

[0029] As shown in Figures 3-4, the diameter of the sprocket 308 at the end of the first pressure roller 303 is the same as the diameter of the sprocket 308 at the end of the second pressure roller 304. The diameter of the sprocket 308 at the end of the first crushing component 305 is the same as the diameter of the sprocket 308 at the end of the second crushing component 306. The diameter of the sprocket 308 at the ends of the first pressure roller 303 and the second pressure roller 304 is larger than the diameter of the sprocket 308 at the ends of the first crushing component 305 and the second crushing component 306. The drive component 2 includes a motor 201 and an output gear 202 mounted on the output shaft of the motor 201. The output gear 202 is meshed with the drive gear ring 302 for transmission. When biomass passes through the first crushing component 305 and the second crushing component 306, since the rotation speed of the crushing component is higher than that of the pressure roller, the crushing component can continuously crush and refine the biomass raw material, maximizing the crushing effect.

[0030] As shown in Figure 3, the distance between the first crushing component 305 and the second pressure roller 304 is equal to the distance between the second crushing component 306 and the first pressure roller 303; the distance between the first pressure roller 303 and the second pressure roller 304 is greater than the distance between the second crushing component 306 and the first pressure roller 303.

[0031] As shown in Figures 4-5, the first crushing component 305 and the second crushing component 306 have the same structure. The second crushing component 306 includes a central shaft 309, a drive cylinder 311, an outer pressure cylinder 314, a crushing component 315, and a dispersing component 316. The central shaft 309 is coaxially arranged inside the drive cylinder 311, and the outer pressure cylinder 314 is coaxially sleeved on the drive cylinder 311. A central support frame 310 is fixedly installed in the middle of the central shaft 309, and the end of the central support frame 310 is fixedly connected to the drive cylinder 311. Both ends of the central shaft 309 are splined shafts, and splined cylinders 312 are drivenly connected to the splined shafts at both ends of the central shaft 309. An end support frame 313 is fixedly installed on the splined cylinder 312, and the other end of the end support frame 313 is connected to the outer pressure cylinder 314. The central shaft 309 is fixedly connected, with both ends rotatably mounted on the support frame 301. The sprocket 308 is mounted on the end of the central shaft 309. A first pusher 318 and a second pusher 320 are respectively mounted on both ends of the external pressure cylinder 314. The first pusher 318 and the second pusher 320 are located on both sides of the central shaft 309. The first pusher 318 and the second pusher 320 gradually become thinner from the middle to both ends. A first guide wheel 317 and a second guide wheel 319 are respectively mounted on both sides of the support frame 301. The crushing component 315 and the dispersing component 316 are spaced apart and installed on the external pressure cylinder 314. By setting the crushing component, the external pressure cylinder 314 can first perform axial repeated movement when rotating, applying a kneading effect to the biomass raw material and promoting its fiber dispersion.

[0032] As shown in Figure 7, the rolling component 315 includes a rolling block 325. A rolling groove 326 is formed on the side wall of the rolling block 325 away from the axis of the outer pressure cylinder 314. A connecting shaft 321 is fixedly installed on the bottom end of the rolling block 325. The other end of the connecting shaft 321 passes through the outer pressure cylinder 314 and is rotatably connected to the outer pressure cylinder 314. A connecting plate 322 is fixedly connected to the end of the connecting shaft 321. A driving pin 323 is fixedly installed on the end of the connecting plate 322. A driving groove 324 is formed on the outer wall of the driving cylinder 311 along its circumference. The end of the driving pin 323 is inserted into the driving groove 324. By setting the rolling component 315, the rolling block 325 can first apply a high local pressure to promote fiber dispersion. During the rotation of the rolling block 325, it can swing. In conjunction with the rolling groove 326, it can apply overall transverse kneading and local repeated torsional kneading to the fiber bundle.

[0033] As shown in Figure 8, the dispersing component 316 includes a blade 327. A connecting shaft 321 is fixedly connected to the bottom of the blade 327. The other end of the connecting shaft 321 passes through the outer pressure cylinder 314 and is rotatably connected to the outer pressure cylinder 314. A connecting plate 322 is fixedly installed on the end of the connecting shaft 321. A driving pin 323 is fixedly installed on the end of the connecting plate 322. A driving groove 324 is opened along its circumference on the outer wall of the driving cylinder 311. The end of the driving pin 323 is inserted into the driving groove 324. By setting the dispersing component 316, the blade 327 can continuously cut the fiber bundle during rotation. Furthermore, the blade 327 can swing during rotation, thereby improving the cutting effect.

[0034] As shown in Figure 1, the outer diameter of the crushing cylinder 5 gradually increases from top to bottom. A heating plate 6 is installed on the inner wall of the crushing cylinder 5, and a heating plate 6 is also installed on the outer wall of the housing 1. An inner discharge port 11 is installed at the bottom of the crushing cylinder 5, corresponding to the outer discharge port 10. Valves are provided on both the inner discharge port 11 and the outer discharge port 10. An air guide groove 8 is coaxially arranged on the top of the crushing cylinder 5. A through hole communicating with the inside of the crushing cylinder 5 is opened on the bottom wall of the air guide groove 8. A heating plate 6 is installed on the air guide groove 8. An annular cover plate 12 is provided, on which an air pipe 9 is installed. One end of the air pipe 9 is inserted into the air guide groove 8, and the other end of the air pipe 9 extends out of the machine casing 1. An air inlet pipe 7 is provided on the side wall of the crushing cylinder 5. One end of the air inlet pipe 7 is connected to the crushing space, and the other end of the air inlet pipe 7 is connected to the inside of the crushing cylinder 5. By setting the crushing cylinder 5 and the heating plate 6, after the fiber is crushed, it falls into the crushing space and is continuously crushed and heated and pyrolyzed simultaneously. Due to continuous contact with the heat source, the pyrolysis effect and efficiency can be improved, making the pyrolysis more thorough.

[0035] As shown in Figure 1, the air inlet pipe 7 extends gradually upward from one end connected to the crushing cylinder 5 to the middle, ensuring that the biomass residue will not slip into the crushing cylinder 5. The middle part of the air inlet pipe 7 bends downward from the other end. When the air is drawn, the gas carries the particulate impurities downward first, giving the particulate impurities a downward tendency. Then the gas rises again, promoting the separation of the gas and the particulate impurities. By setting the air inlet pipe 7, pyrolysis gas can be drawn while pyrolysis is being performed, thereby accelerating the pyrolysis gas extraction speed and preventing the bottom layer of pyrolysis from failing to release gas.

[0036] Workflow: During pyrolysis, the heating plate 6 is turned on for preheating. The heating plate 6 is an electric heating plate. The motor 201 is started, which drives the drive gear ring 302 to rotate, causing the entire crushing mechanism 3 to rotate. When the crushing mechanism 3 rotates, the gear 307 continuously meshes and rolls on the fixed gear ring 14, causing the gear 307 to rotate on its own, as shown in Figure 3-4. The two first pressure rollers 303 rotate through the drive of the gear 307, and both rotate inward synchronously. The first pressure roller 303 drives the first crushing component 305 to rotate through the chain, and the second pressure roller 304 drives the second crushing component 306 to rotate through the chain. The rotation speed of the crushing component is higher than that of the pressure roller. Through the speed difference, the crushing component continuously crushes the biomass raw materials. The crushing mechanism 3 not only achieves its own overall rotation, but also allows each roller to rotate.

[0037] As shown in Figure 1, while the crushing mechanism 3 rotates, it can synchronously drive the crushing cylinder 5 to rotate. The crushing cylinder 5 rotates relative to the inner wall of the crushing cylinder 5, thereby achieving further crushing. Under the dual action of high temperature and crushing, the crushing effect is further improved.

[0038] As shown in Figure 3, under normal conditions, the outer discharge port 10 and the inner discharge port 11 are closed. They are opened when discharge is required. When the preheating reaches the preset temperature, the biomass raw material is fed in. The two rotating first pressure rollers 303 roll in the raw material and apply initial crushing to make the raw material continue to move downward. After contacting the two crushing components, the harder fibers can be continuously crushed, and the softer fibers can be pushed into the gap between the pressure rollers and the crushing components and continuously crushed.

[0039] As shown in Figure 5, during crushing, the continuous rotation of the blade 327 enables the cutting and scraping of the fiber bundles, while the crushing block 325 applies high local pressure, thereby promoting fiber separation. Simultaneously, during the continuous rotation of the outer pressure cylinder 314, when the first push block 318 contacts the first guide wheel 317, the outer pressure cylinder 314 is pushed to one side; when the second push block 320 contacts the second guide wheel 319, the outer pressure cylinder 314 is pushed to the other side, achieving the reciprocating axial movement of the outer pressure cylinder 314, thus applying a kneading effect to the fibers. During the axial movement of the outer pressure cylinder 314, since the drive cylinder 311 is fixed to the central shaft 309, it can only... As shown in Figure 7, the outer pressure cylinder 314 rotates but cannot move axially. The axial movement of the outer pressure cylinder 314 drives the crushing block 325 to work synchronously. Under the action of the drive groove 324, drive pin 323 and connecting plate 322, the connecting shaft 321 rotates, causing the crushing block 325 to deflect. This applies local torsion to the fiber bundle, promoting fiber bundle dispersion. Furthermore, under the action of the crushing groove 326, part of the fiber bundle is stuck in the crushing groove 326. Under the oscillation of the crushing block 325, the fiber bundle is further split. As shown in Figure 8, using the same principle, the blade 327 can oscillate when rotating, thereby promoting the dispersion and crushing effect on the fiber bundle.

[0040] As shown in Figure 1, a certain gap is left between the feed trough 4 and the crushing cylinder 5 to ensure that the biomass at the top of the crushing cylinder 5 can enter the crushing space. The crushed fibers are thrown into the feed trough 4 and enter the crushing space under the rotation of the crushing components. Under the continuous rotation of the crushing cylinder 5, crushing and pyrolysis are achieved. When a catalyst needs to be added, the crushing cylinder 5 can also promote the full contact and reaction between the biomass and the catalyst. The generated pyrolysis gas is extracted through the gas pipe 9. The setting of the gas inlet pipe 7 can not only ensure the timely release of pyrolysis gas, but also reduce the impurity content in the pyrolysis gas. Finally, tar and fuel gas are obtained after treatment.

[0041] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A biomass pyrolysis system for co-producing tar and fuel gas, characterized in that, The device includes a housing (1), a crushing mechanism (3), and a crushing cylinder (5). The crushing mechanism (3) is rotatably installed inside the housing (1), and the crushing cylinder (5) is fixedly installed on the bottom of the crushing mechanism (3). The crushing cylinder (5) is coaxially arranged with the housing (1). When the crushing mechanism (3) rotates, it can synchronously drive the crushing cylinder (5) to rotate. A crushing space is formed between the outer wall of the crushing cylinder (5) and the inner wall of the housing (1). A feed inlet is provided on the top of the housing (1). An external discharge port (10) is provided at the bottom; a drive assembly (2) is installed on one side of the housing (1), the output end of the drive assembly (2) is connected to the crushing mechanism (3), the drive assembly (2) drives the crushing mechanism (3) to rotate inside the housing (1), a fixed gear ring (14) is coaxially fixedly installed inside the housing (1), a gear (307) is fixedly installed on the power input shaft of the crushing mechanism (3), and the gear (307) meshes with the fixed gear ring (14); on the inner wall of the housing (1) A guide trough (4) is coaxially fixedly installed, with the bottom of the guide trough (4) inserted between the crushing cylinder (5) and the housing (1); the outer diameter of the crushing cylinder (5) gradually increases from the top to the bottom; a heating plate (6) is installed on the inner wall of the crushing cylinder (5), and a heating plate (6) is also installed on the outer wall of the housing (1); an inner discharge port (11) is installed on the bottom of the crushing cylinder (5), and the inner discharge port (11) corresponds to the outer discharge port (10); a coaxially arranged [feature / structure] is provided on the top of the crushing cylinder (5). An air guide groove (8) is provided on the bottom wall of which a through hole is provided to communicate with the inside of the crushing cylinder (5). An annular cover plate (12) is installed on the air guide groove (8). An air pipe (9) is installed on the annular cover plate (12). One end of the air pipe (9) is inserted into the air guide groove (8), and the other end of the air pipe (9) extends out of the housing (1). An air inlet pipe (7) is provided on the side wall of the crushing cylinder (5). One end of the air inlet pipe (7) is connected to the crushing space, and the other end of the air inlet pipe (7) is connected to the inside of the crushing cylinder (5).

2. The biomass pyrolysis co-production system for tar and fuel gas according to claim 1, characterized in that, The crushing mechanism (3) includes a support frame (301) and a first pressure roller (303), a second pressure roller (304), a first crushing component (305), and a second crushing component (306) arranged in a clockwise direction and parallel to each other. The first pressure roller (303) and the second pressure roller (304) are rotatably mounted side by side on the upper part of the support frame (301), and the first crushing component (305) and the second crushing component (306) are rotatably mounted side by side on the lower part of the support frame (301). A sprocket (308) is fixedly mounted on the first end of the first pressure roller (303) and the first end of the first crushing component (305). The first pressure roller (303) and the first crushing component (305) are connected by a chain drive. A sprocket (308) is fixedly mounted on the second end of the second pressure roller (304) and the second crushing component (306). The crushing components (306) are also fixedly equipped with sprockets (308). The second pressure roller (304) and the second crushing components (306) are connected by chain drive. A rotary support ring (13) is coaxially fixedly installed inside the support frame (301). A drive gear ring (302) is fixedly installed at the top of the support frame (301). The drive gear ring (302) is rotatably installed on the rotary support ring (13). The drive end of the drive component (2) is drivenly connected to the drive gear ring (302). The gear (307) is fixedly installed on the second end of the first pressure roller (303) and the first end of the second pressure roller (304). The gear (307) meshes with the fixed gear ring (14). The bottom end of the support frame (301) is fixedly connected to the top end of the crushing cylinder (5).

3. A biomass pyrolysis co-production system for tar and fuel gas according to claim 2, characterized in that, The diameter of the sprocket (308) at the end of the first pressure roller (303) is the same as the diameter of the sprocket (308) at the end of the second pressure roller (304). The diameter of the sprocket (308) at the end of the first crushing component (305) is the same as the diameter of the sprocket (308) at the end of the second crushing component (306). The diameter of the sprocket (308) at the end of the first pressure roller (303) and the second pressure roller (304) is greater than the diameter of the sprocket (308) at the end of the first crushing component (305) and the second crushing component (306). The drive component (2) includes a motor (201) and an output gear (202) mounted on the output shaft of the motor (201). The output gear (202) meshes with the drive gear ring (302) for transmission.

4. A biomass pyrolysis co-production system for tar and fuel gas according to claim 3, characterized in that, The distance between the first crushing component (305) and the second pressure roller (304) is equal to the distance between the second crushing component (306) and the first pressure roller (303); the distance between the first pressure roller (303) and the second pressure roller (304) is greater than the distance between the second crushing component (306) and the first pressure roller (303).

5. A biomass pyrolysis co-production system for tar and fuel gas according to claim 3, characterized in that, The first crushing component (305) and the second crushing component (306) have the same structure. The second crushing component (306) includes a central shaft (309), a drive cylinder (311), an external pressure cylinder (314), a crushing component (315), and a dispersing component (316). The central shaft (309) is coaxially arranged inside the drive cylinder (311), and the external pressure cylinder (314) is coaxially sleeved on the drive cylinder (311). A central support frame (310) is fixedly installed in the middle of the central shaft (309), and the end of the central support frame (310) is fixedly connected to the drive cylinder (311). Both ends of the central shaft (309) are splined shafts, and splined cylinders (312) are drivenly connected to the splined shafts at both ends of the central shaft (309). End support frames (316) are fixedly installed on the splined cylinders (312). 3) The other end of the end support frame (313) is fixedly connected to the external pressure cylinder (314). Both ends of the central shaft (309) are rotatably mounted on the support frame (301). The sprocket (308) is mounted on the end of the central shaft (309). The first push block (318) and the second push block (320) are respectively mounted on both ends of the external pressure cylinder (314). The first push block (318) and the second push block (320) are respectively located on both sides of the central shaft (309). The first push block (318) and the second push block (320) gradually become thinner from the middle to both ends. The first guide wheel (317) and the second guide wheel (319) are respectively mounted on both sides of the support frame (301). The rolling component (315) and the dispersing component (316) are spaced apart and mounted on the external pressure cylinder (314).

6. A biomass pyrolysis co-production system for tar and fuel gas according to claim 5, characterized in that, The rolling component (315) includes a rolling block (325). A rolling groove (326) is provided on the side wall of the rolling block (325) away from the axis of the outer pressure cylinder (314). A connecting shaft (321) is fixedly installed on the bottom end of the rolling block (325). The other end of the connecting shaft (321) passes through the outer pressure cylinder (314) and is rotatably connected to the outer pressure cylinder (314). A connecting plate (322) is fixedly connected to the end of the connecting shaft (321). A driving pin (323) is fixedly installed on the end of the connecting plate (322). A driving groove (324) is provided on the outer wall of the driving cylinder (311) along its circumference. The end of the driving pin (323) is inserted into the driving groove (324).

7. A biomass pyrolysis co-production system for tar and fuel gas according to claim 5, characterized in that, The dispersing component (316) includes a blade (327), a connecting shaft (321) is fixedly connected to the bottom of the blade (327), the other end of the connecting shaft (321) passes through the outer pressure cylinder (314) and is rotatably connected to the outer pressure cylinder (314), a connecting plate (322) is fixedly installed on the end of the connecting shaft (321), a driving pin (323) is fixedly installed on the end of the connecting plate (322), a driving groove (324) is opened along its circumference on the outer wall of the driving cylinder (311), and the end of the driving pin (323) is inserted into the driving groove (324).

8. A biomass pyrolysis co-production system for tar and fuel gas according to claim 1, characterized in that, The air inlet pipe (7) extends gradually upward from one end connected to the crushing cylinder (5) to its middle part, and the middle part of the air inlet pipe (7) bends downward from its other end.

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