Biomass staged fast pyrolysis system and its drying feed device

Abstract

This invention discloses a biomass graded rapid pyrolysis system and its drying and feeding device, belonging to the technical field of biomass pyrolysis equipment, and solving the problem of low efficiency in biomass pyrolysis. The biomass graded rapid pyrolysis system includes a drying and feeding device, a tubular dryer, a material fan, a drying cyclone, a pyrolysis feeding device, a heat carrier feeding device, a primary pyrolysis reactor, a primary pyrolysis buffer chamber, a secondary pyrolysis reactor, a secondary pyrolysis buffer chamber, a tertiary pyrolysis reactor, a tertiary pyrolysis buffer chamber, a pyrolysis product conveying screw, a primary pyrolysis cyclone, a primary pyrolysis cyclone carbon powder conveying screw, a secondary pyrolysis cyclone, a secondary pyrolysis cyclone carbon powder conveying screw, a tertiary pyrolysis cyclone, and a tertiary pyrolysis cyclone carbon powder conveying screw. In this invention, a combination of a spiral pyrolysis reactor and direct heating pyrolysis technology with a solid heat carrier is used to enhance mass and heat transfer between the heat carrier and the material, achieving rapid pyrolysis of the material.

Description

Technical Field

[0001] This invention relates to the field of biomass pyrolysis equipment technology, specifically to a biomass graded rapid pyrolysis system and its drying and feeding device. Background Technology

[0002] Biomass resources are the fourth largest energy source after coal, oil, and natural gas, and the largest renewable energy source. The technology of converting biomass resources into green chemicals through pyrolysis can increase their energy density and solve transportation and utilization problems, making it one of the technologies for realizing the high-value utilization of biomass resources.

[0003] At present, rapid pyrolysis technology mainly includes direct pyrolysis and indirect pyrolysis technology.

[0004] Direct pyrolysis technologies mainly include gaseous heat carrier pyrolysis and solid heat carrier pyrolysis. Gaseous heat carrier technology typically uses pyrolysis gas as a circulating heat carrier. This technology can achieve uniform and rapid heating of materials, thereby obtaining a high bio-oil yield. However, the circulating pyrolysis gas has a large circulation volume and needs to be purified before being heated to the target temperature. The purification of circulating pyrolysis gas is difficult, and the energy and power consumption are extremely high, so it is rarely used in the market.

[0005] Without the addition of a forced mixing device, the mixing, mass transfer and heat transfer between materials and raw materials in solid heat carrier pyrolysis technology are uneven, affecting the liquid phase yield and quality. However, existing forced mixing technologies have failed to solve the problem of dynamic high-temperature sealing at the shaft end, resulting in leakage of pyrolysis oil and gas during the pyrolysis process, which affects the continuous operation of the device and also brings safety hazards.

[0006] Indirect pyrolysis technology mainly uses an externally heated heating surface to heat the reactants, thereby achieving the pyrolysis reaction. However, indirect pyrolysis technology has two main drawbacks: firstly, the limited heating surface makes it difficult to achieve rapid pyrolysis, thus affecting the yield of liquid products; secondly, there is the problem of coking on the heating surface, which in turn affects the continuous operation of the equipment.

[0007] In summary, the shortcomings of existing technologies are as follows: (1) The uneven heating of biomass and slow heating rate in existing biomass pyrolysis technology lead to a decline in the yield and quality of bio-oil. (2) Existing biomass pyrolysis technology faces the problem of high-temperature dynamic sealing of transmission equipment and forced mixing equipment; (3) The problem of coking on the heat transfer surface of the pyrolysis reactor in existing biomass pyrolysis technologies. Summary of the Invention

[0008] The purpose of this invention is to provide a biomass graded rapid pyrolysis system and its drying and feeding device to solve the problems mentioned in the background art.

[0009] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0010] This invention provides a biomass graded rapid pyrolysis system, comprising: a drying feed device, a tubular dryer, a material blower, a drying cyclone, a pyrolysis feed device, a heat carrier feed device, a primary pyrolysis reactor, a primary pyrolysis buffer chamber, a secondary pyrolysis reactor, a secondary pyrolysis buffer chamber, a tertiary pyrolysis reactor, a tertiary pyrolysis buffer chamber, a pyrolysis product conveying screw, a primary pyrolysis cyclone, a primary pyrolysis cyclone carbon powder conveying screw, a secondary pyrolysis cyclone, a secondary pyrolysis cyclone carbon powder conveying screw, a tertiary pyrolysis cyclone, and a tertiary pyrolysis cyclone. The system includes: a primary pyrolysis cyclone charcoal powder conveying screw, a solid-solid separation device, a solid-solid separation cyclone, a biochar conveying and cooling screw, a solid-solid separation fan, a primary pyrolysis spray tower, a primary pyrolysis spray circulating pump, a primary pyrolysis heat exchanger, a primary pyrolysis gas induced draft fan, a secondary pyrolysis spray tower, a secondary pyrolysis spray circulating pump, a secondary pyrolysis heat exchanger, a secondary pyrolysis gas induced draft fan, a tertiary pyrolysis spray tower, a tertiary pyrolysis spray circulating pump, a tertiary pyrolysis heat exchanger, a tertiary pyrolysis gas induced draft fan, a hot air furnace, an air preheater, and a combustion blower.

[0011] The drying system comprises a drying feed device, a tubular dryer, a material blower, and a drying cyclone. The pyrolysis system comprises a primary pyrolysis reactor, a primary pyrolysis buffer chamber, a secondary pyrolysis reactor, a secondary pyrolysis buffer chamber, a tertiary pyrolysis reactor, and a tertiary pyrolysis buffer chamber. The pyrolysis system has three layers of pyrolysis structures, and each group of pyrolysis structures is connected to the primary pyrolysis cyclone carbon powder conveying screw, the secondary pyrolysis cyclone carbon powder conveying screw, and the tertiary pyrolysis cyclone carbon powder conveying screw, respectively. Each group of pyrolysis structures is also connected to the primary pyrolysis spray tower, the secondary pyrolysis spray tower, and the tertiary pyrolysis spray tower, respectively. The primary pyrolysis gas induced draft fan, the secondary pyrolysis gas induced draft fan, and the tertiary pyrolysis gas induced draft fan are connected in parallel and connected to the hot air furnace.

[0012] In a preferred embodiment of the present invention, the drying feed device, the tubular dryer, the material blower, and the drying cyclone are connected in sequence, and the pyrolysis feed device and the heat carrier feed device are located side by side at the top of the primary pyrolysis reactor.

[0013] The primary pyrolysis reactor, primary pyrolysis buffer chamber, secondary pyrolysis reactor, secondary pyrolysis buffer chamber, tertiary pyrolysis reactor, tertiary pyrolysis buffer chamber, and pyrolysis product conveying spiral are connected in sequence.

[0014] In a preferred embodiment of the present invention, the primary pyrolysis reactor, the primary pyrolysis cyclone, and the primary pyrolysis cyclone carbon powder conveying screw are connected in sequence, and the primary pyrolysis cyclone carbon powder conveying screw conveys the separated carbon powder to the interior of the primary pyrolysis buffer chamber.

[0015] The secondary pyrolysis reactor, the secondary pyrolysis cyclone, and the secondary pyrolysis cyclone carbon powder conveying screw are connected in sequence. The secondary pyrolysis cyclone carbon powder conveying screw transports the separated carbon powder to the interior of the secondary pyrolysis buffer chamber 10.

[0016] The three-stage pyrolysis reactor, the three-stage pyrolysis cyclone, and the three-stage pyrolysis cyclone carbon powder conveying screw are connected in sequence. The three-stage pyrolysis cyclone carbon powder conveying screw conveys the separated carbon powder to the interior of the three-stage pyrolysis buffer chamber.

[0017] As a preferred embodiment of the present invention, the primary pyrolysis cyclone, the primary pyrolysis spray tower and the primary pyrolysis gas induced draft fan are connected in sequence, the primary pyrolysis spray tower, the primary pyrolysis spray circulating pump and the primary pyrolysis heat exchanger are connected in sequence, and the primary pyrolysis heat exchanger and the primary pyrolysis spray tower are circulatedly connected.

[0018] The secondary pyrolysis cyclone, the secondary pyrolysis spray tower, and the secondary pyrolysis gas induced draft fan are connected in sequence. The secondary pyrolysis spray tower, the secondary pyrolysis spray circulating pump, and the secondary pyrolysis heat exchanger are connected in sequence. The secondary pyrolysis heat exchanger and the secondary pyrolysis spray tower are circulated together.

[0019] The three-stage pyrolysis cyclone, the three-stage pyrolysis spray tower, and the three-stage pyrolysis gas induced draft fan are connected in sequence. The three-stage pyrolysis spray tower, the three-stage pyrolysis spray circulating pump, and the three-stage pyrolysis heat exchanger are connected in sequence, and the three-stage pyrolysis heat exchanger and the three-stage pyrolysis spray tower are circulated together.

[0020] The primary pyrolysis gas induced draft fan, the secondary pyrolysis gas induced draft fan, and the tertiary pyrolysis gas induced draft fan are connected in parallel and then connected to the hot blast furnace.

[0021] The pyrolysis product conveying spiral, solid-solid separation device, solid-solid separation cyclone and biochar conveying and cooling spiral are connected in sequence, and the solid-solid separation device, hot air furnace and heat carrier feeding device are connected in sequence.

[0022] In a preferred embodiment of the present invention, the primary pyrolysis reactor, the secondary pyrolysis reactor, and the tertiary pyrolysis reactor have the same specifications and shape, and internally comprise: a motor reducer, a combined shaft end sealing device, a feed inlet, a discharge outlet, spiral blades, long-end stirring blades, short-end stirring blades, a reactor outer wall, and a spiral shaft.

[0023] The combined shaft end sealing device has a motor reducer installed on one side. The output end of the motor reducer is connected to a spiral blade, a long-end stirring blade, a short-end stirring blade, and a spiral shaft. The spiral blade, the long-end stirring blade, the short-end stirring blade, and the spiral shaft constitute a spiral stirring shaft that is movably connected inside the combined shaft end sealing device.

[0024] The feed inlet is located on one side of the top of the combined shaft end sealing device, and the discharge outlet is located on one side of the bottom of the combined shaft end sealing device. The two combined shaft end sealing devices and the outer wall of the reactor constitute a sealed reactor shell structure. The combined shaft end sealing devices are installed on the left and right sides of the outer wall of the reactor.

[0025] As a preferred embodiment of the present invention, the combined shaft end sealing device internally includes: a cooling shaft sleeve, a cooling water outlet, a nitrogen seal, a nitrogen gas sealing inlet, a cooling water inlet, an end limiting ring, a first labyrinth sealing ring, sealing packing, a second labyrinth sealing ring, and sealing packing.

[0026] The combined shaft end sealing device consists of, from the material end to the outer end, an end limiting ring, sealing packing, a first labyrinth sealing ring, sealing packing, a second labyrinth sealing ring, and sealing packing. The cooling shaft sleeve is fitted over the combined sealing portion of the first labyrinth sealing ring and sealing packing, and the second labyrinth sealing ring and sealing packing. The nitrogen sealing inlet is located at the end of the combined sealing portion of the first labyrinth sealing ring and sealing packing, and the second labyrinth sealing ring and sealing packing are completely covered by the nitrogen seal.

[0027] The cooling bushing is provided with a cooling water outlet and a cooling water inlet, and the nitrogen seal is provided with a nitrogen gas sealing inlet.

[0028] This invention also provides a drying and feeding device for rapid pyrolysis of biomass with graded components. A thermal spraying device is installed on the inner wall of the drying and feeding device, and a stirring and feeding device is installed inside the drying and feeding device on the outer side of the thermal spraying device. Material is transported into the drying and feeding device through an inlet pipe at the top of the device, and the stirred and dried material is transported into the tubular dryer through an outlet pipe.

[0029] The mixing and feeding device includes a gear-driven multi-stage mixing structure, which is installed on the inner top of the drying feeding device. A metal rod is connected to the bottom of the gear-driven multi-stage mixing structure, and a gear feeding structure is connected to the bottom of the metal rod. The gear feeding structure is movably connected inside the drying feeding device.

[0030] As a preferred embodiment of the present invention, the thermal spraying device includes:

[0031] Side wall panels are installed on the left and right sides of the inner wall of the drying feed device. An annular heat pipe is installed inside the side wall panel. One end of the annular heat pipe extends to the outside of the drying feed device and is connected to a gas control valve.

[0032] The nozzle is connected to the annular heat pipe body and is positioned downwards.

[0033] As a preferred embodiment of the present invention, the gear-driven multi-stage stirring structure includes:

[0034] A linear motor is installed at the eccentric position on the top of the drying feeding device and located on the side of the feed pipe. A synchronous belt is connected to the outer side of the output end of the linear motor through a synchronous pulley. The synchronous belt is movably installed on the top of the drying feeding device.

[0035] The first rotating rod is connected to the inner side of the synchronous belt via a synchronous pulley and is movably disposed at an eccentric position on the inner wall of the drying feed device. A first gear is mounted on the outer side of the first rotating rod and rotatably connected to the top of the drying feed device.

[0036] The first rotating rod and the first gear are provided in multiple ways. Multiple mixing blades are installed on the outer side of the first rotating rod. A metal rod is connected to the bottom of one of the first rotating rods.

[0037] An intermediate gear is meshed with the inner side of the first gear and rotatably connected to the outer side of the feed pipe. An intermediate rotating rod is connected to the eccentric part of the bottom of the intermediate gear through an oblique sleeve rod. Multiple mixing blades are installed on the outer side of the intermediate rotating rod.

[0038] The lower support base is installed inside the drying feeding device and has multiple through holes inside. The top of the lower support base is rotatably connected to a central rotating rod.

[0039] As a preferred embodiment of the present invention, the gear feeding structure includes:

[0040] A lower bevel gear is connected to the bottom of the metal rod, and a side bevel gear is meshed with the side of the lower bevel gear. Both the side bevel gear and the lower bevel gear are movably connected to the side of the drying feed device.

[0041] A spiral feeding roller is connected to a lower bevel gear. The spiral feeding roller is rotatably connected to the inner bottom of the drying feed device and is located above the discharge pipe.

[0042] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects: 1. In the biomass graded rapid pyrolysis system and its drying and feeding device, graded pyrolysis is achieved through the regulation of three parallel and uniquely configured pyrolysis reactors, thereby improving the quality of bio-oil. Simultaneously, a combination of a spiral pyrolysis reactor and direct heating pyrolysis technology with a solid heat carrier is employed. The unique design of the spiral pyrolysis reactor's internal components enhances mass and heat transfer between the heat carrier and the material, enabling rapid pyrolysis of the material. This allows for the initial separation of water and organic acids from the initial pyrolysis products, further improving the quality of the bio-oil.

[0043] It should be noted that the multi-stage design of the pyrolysis reactor, consisting of "spiral blades + long-end stirring blades + short-end stirring blades," combined with the grinding effect of the solid heat carrier, effectively solves the problem of coking on the reactor wall, enhances mass and heat transfer between the heat carrier and the material, and achieves rapid pyrolysis of the material. 2. In the biomass graded rapid pyrolysis system and its drying feed device, during the pyrolysis of biomass materials by the pyrolysis reactor, a unique design of "nitrogen seal + labyrinth seal + packing seal" is adopted for the shaft end seal of the pyrolysis reactor. On the one hand, its sealing structure can form a pressure gradient, the nitrogen seal blocks the leakage of pyrolysis gas, the labyrinth seal reduces pressure and leakage, and the packing seal acts as a final barrier, so even if one stage fails, the others can still maintain the sealing effect. On the other hand, the labyrinth and nitrogen seals bear the main pressure difference, significantly reducing the pressure difference and gas erosion borne by the packing seal, slowing down the wear of the packing, and extending the replacement cycle. Furthermore, the shaft end is designed with a cooling jacket, which can effectively reduce the shaft end temperature and effectively solve the high-temperature sealing problem. 3. In the biomass graded rapid pyrolysis system and its drying feeder, when drying biomass materials, the biomass raw materials stored inside the drying feeder are stirred at multiple locations. Combined with pressurized sprayed drying gas, this allows the biomass raw materials to continuously tumble inside the feeder, increasing the contact area between the raw materials and the drying gas, thus improving the drying effect. Simultaneously, the drive source that tumbles the biomass raw materials also drives the spiral feed roller to rotate, pushing the dried biomass raw materials to the next drying unit (tubular dryer) automatically and evenly, achieving automated biomass raw material drying operations. Attached Figure Description

[0044] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0045] Furthermore, the terms "installation," "setup," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0046] Figure 1 This is a schematic diagram of the pyrolysis system of the present invention;

[0047] Figure 2 This is a schematic diagram showing the connection between the drying feed device and the primary pyrolysis buffer chamber of the present invention;

[0048] Figure 3 This is a schematic diagram showing the connection between the primary pyrolysis reactor and the tertiary pyrolysis buffer chamber of the present invention;

[0049] Figure 4 This is a schematic diagram showing the connection between the three-stage pyrolysis buffer chamber and the solid-solid separation fan of the present invention;

[0050] Figure 5 This is a schematic diagram showing the connection between the primary pyrolysis spray tower and the hot air furnace of the present invention;

[0051] Figure 6 This is a schematic diagram showing the connection between the hot air furnace and the combustion blower of the present invention;

[0052] Figure 7 This is a schematic diagram of the pyrolysis reactor of the present invention from a top-down perspective;

[0053] Figure 8 This is a schematic diagram of the front section of the pyrolysis reactor of the present invention;

[0054] Figure 9 This is a top-section structural schematic diagram of the combined shaft end sealing device of the present invention;

[0055] Figure 10 This is a schematic diagram of the drying and feeding device of the present invention;

[0056] Figure 11 This is a cross-sectional structural schematic diagram of the drying and feeding device of the present invention;

[0057] Figure 12 This is a front cross-sectional view of the drying and feeding device of the present invention;

[0058] Figure 13 This is a cross-sectional structural diagram showing the connection between the drying feeding device and the thermal spraying device of the present invention;

[0059] Figure 14This is a cross-sectional structural diagram showing the connection between the drying feeding device and the gear multi-stirring structure of the present invention;

[0060] Figure 15 This is the present invention. Figure 14 Enlarged structural diagram of region A in the middle;

[0061] Figure 16 This is a schematic diagram of the structure of the mixing and feeding device of the present invention;

[0062] Figure 17 This is a schematic diagram of the connection between the intermediate gear and the lower support base of the present invention;

[0063] Figure 18 This is a cross-sectional structural diagram showing the connection between the drying feeding device and the gear feeding structure of the present invention;

[0064] In the picture:

[0065] 1. Drying feeder; 2. Tubular dryer; 3. Material blower; 4. Drying cyclone; 5. Pyrolysis feeder; 6. Heat carrier feeder; 7. Primary pyrolysis reactor; 8. Primary pyrolysis buffer chamber; 9. Secondary pyrolysis reactor; 10. Secondary pyrolysis buffer chamber; 11. Tertiary pyrolysis reactor; 12. Tertiary pyrolysis buffer chamber; 13. Pyrolysis product conveying screw; 14. Primary pyrolysis cyclone; 15. Primary pyrolysis cyclone carbon powder conveying screw; 16. Secondary pyrolysis cyclone; 17. Secondary pyrolysis cyclone carbon powder conveying screw; 18. Tertiary pyrolysis cyclone; 19. Tertiary pyrolysis cyclone carbon powder conveying screw; 20. Solid Solid-solid separation unit; 21. Solid-solid separation cyclone; 22. Biochar conveying and cooling spiral; 23. Solid-solid separation fan; 24. Primary pyrolysis spray tower; 25. Primary pyrolysis spray circulating pump; 26. Primary pyrolysis heat exchanger; 27. Primary pyrolysis gas induced draft fan; 28. Secondary pyrolysis spray tower; 29. ​​Secondary pyrolysis spray circulating pump; 30. Secondary pyrolysis heat exchanger; 31. Secondary pyrolysis gas induced draft fan; 32. Tertiary pyrolysis spray tower; 33. Tertiary pyrolysis spray circulating pump; 34. Tertiary pyrolysis heat exchanger; 35. Tertiary pyrolysis gas induced draft fan; 36. Hot air furnace; 37. Air preheater; 38. Combustion blower;

[0066] 0901, Motor reducer; 0902, Combined shaft end sealing device; 0903, Feed inlet; 0904, Discharge outlet; 0905, Spiral blades; 0906, Long-end stirring blades; 0907, Short-end stirring blades; 0908, Reactor outer wall; 0909, Spiral shaft;

[0067] 090201, Cooling bushing; 090202, Cooling water outlet; 090203, Nitrogen seal; 090204, Nitrogen seal inlet; 090205, Cooling water inlet; 090206, End limiting ring; 090207, First labyrinth seal ring; 090208, Sealing packing; 090209, Second labyrinth seal ring;

[0068] 1001. Feed pipe; 1002. Discharge pipe;

[0069] 101. Thermal injection device; 1011. Side wall plate; 1012. Annular heat pipe body; 1013. Gas control valve; 1014. Injection nozzle;

[0070] 102. Mixing and feeding device; 1021. Gear multi-mixing structure; 1022. Metal rod; 1023. Gear feeding structure;

[0071] 10211 Linear motor; 10212 Synchronous belt; 10213 First rotating rod; 10214 First gear; 10215 Mixing blades; 10216 Intermediate gear; 10217 Inclined sleeve; 10218 Intermediate rotating rod; 10219 Lower support base;

[0072] 10231. Lower bevel gear; 10232. Side bevel gear; 10233. Spiral feed roller. Detailed Implementation

[0073] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application. Example 1

[0074] Please see Figures 1-18A biomass graded rapid pyrolysis system includes a drying feed device 1, a tubular dryer 2, a material fan 3, a drying cyclone 4, a pyrolysis feed device 5, a heat carrier feed device 6, a primary pyrolysis reactor 7, a primary pyrolysis buffer chamber 8, a secondary pyrolysis reactor 9, a secondary pyrolysis buffer chamber 10, a tertiary pyrolysis reactor 11, a tertiary pyrolysis buffer chamber 12, a pyrolysis product conveying screw 13, a primary pyrolysis cyclone 14, a primary pyrolysis cyclone carbon powder conveying screw 15, a secondary pyrolysis cyclone 16, and a secondary pyrolysis cyclone... 17. Pyrolysis cyclone charcoal powder conveying screw; 18. Three-stage pyrolysis cyclone; 19. Three-stage pyrolysis cyclone charcoal powder conveying screw; 20. Solid-solid separation device; 21. Solid-solid separation cyclone; 22. Biochar conveying and cooling screw; 23. Solid-solid separation fan; 24. First-stage pyrolysis spray tower; 25. First-stage pyrolysis spray circulation pump; 26. First-stage pyrolysis heat exchanger; 27. First-stage pyrolysis gas induced draft fan; 28. Second-stage pyrolysis spray tower; 29. ​​Second-stage pyrolysis spray circulation pump; 30. Second-stage pyrolysis heat exchanger; 31. Second-stage pyrolysis gas induced draft fan. The system comprises a three-stage pyrolysis spray tower 32, a three-stage pyrolysis spray circulating pump 33, a three-stage pyrolysis heat exchanger 34, a three-stage pyrolysis gas-fired induced draft fan 35, a hot air furnace 36, an air preheater 37, and a combustion blower 38. The drying system consists of a drying feed device 1, a tubular dryer 2, a material fan 3, and a drying cyclone 4. The pyrolysis system consists of a first-stage pyrolysis reactor 7, a first-stage pyrolysis buffer chamber 8, a second-stage pyrolysis reactor 9, a second-stage pyrolysis buffer chamber 10, a third-stage pyrolysis reactor 11, and a third-stage pyrolysis buffer chamber 12. The pyrolysis system has a three-layer pyrolysis structure. Each pyrolysis structure is connected to the first-stage pyrolysis cyclone carbon powder conveying screw 15, the second-stage pyrolysis cyclone carbon powder conveying screw 17, and the third-stage pyrolysis cyclone carbon powder conveying screw 19. Each pyrolysis structure is also connected to the first-stage pyrolysis spray tower 24, the second-stage pyrolysis spray tower 28, and the third-stage pyrolysis spray tower 32. The first-stage pyrolysis gas induced draft fan 27, the second-stage pyrolysis gas induced draft fan 31, and the third-stage pyrolysis gas induced draft fan 35 are connected in parallel and connected to the hot air furnace 36.

[0075] It should be noted that the drying feed device 1, tubular dryer 2, material fan 3 and drying cyclone 4 are connected in sequence, and the pyrolysis feed device 5 and heat carrier feed device 6 are located side by side above the primary pyrolysis reactor 7. The primary pyrolysis reactor 7, primary pyrolysis buffer chamber 8, secondary pyrolysis reactor 9, secondary pyrolysis buffer chamber 10, tertiary pyrolysis reactor 11, tertiary pyrolysis buffer chamber 12 and pyrolysis product conveying screw 13 are connected in sequence.

[0076] The primary pyrolysis reactor 7, the primary pyrolysis cyclone 14, and the primary pyrolysis cyclone carbon powder conveying screw 15 are connected in sequence. The primary pyrolysis cyclone carbon powder conveying screw 15 conveys the separated carbon powder to the interior of the primary pyrolysis buffer chamber 8. The secondary pyrolysis reactor 9, the secondary pyrolysis cyclone 16, and the secondary pyrolysis cyclone carbon powder conveying screw 17 are connected in sequence. The secondary pyrolysis cyclone carbon powder conveying screw 17 conveys the separated carbon powder to the interior of the secondary pyrolysis buffer chamber 10. The tertiary pyrolysis reactor 11, the tertiary pyrolysis cyclone 18, and the tertiary pyrolysis cyclone carbon powder conveying screw 19 are connected in sequence. The tertiary pyrolysis cyclone carbon powder conveying screw 19 conveys the separated carbon powder to the interior of the tertiary pyrolysis buffer chamber 12.

[0077] The primary pyrolysis cyclone 14, primary pyrolysis spray tower 24, and primary pyrolysis gas induced draft fan 27 are connected in sequence. The primary pyrolysis spray tower 24, primary pyrolysis spray circulation pump 25, and primary pyrolysis heat exchanger 26 are connected in sequence, and the primary pyrolysis heat exchanger 26 and primary pyrolysis spray tower 24 are cyclically connected. The secondary pyrolysis cyclone 16, secondary pyrolysis spray tower 28, and secondary pyrolysis gas induced draft fan 31 are connected in sequence. The secondary pyrolysis spray tower 28, secondary pyrolysis spray circulation pump 29, and secondary pyrolysis heat exchanger 30 are connected in sequence, and the secondary pyrolysis heat exchanger 30 and secondary pyrolysis spray tower 28 are cyclically connected. The tertiary pyrolysis cyclone 1... 8. The three-stage pyrolysis spray tower 32 and the three-stage pyrolysis gas induced draft fan 35 are connected in sequence. The three-stage pyrolysis spray tower 32 and the three-stage pyrolysis spray circulating pump 33 are connected in sequence. The three-stage pyrolysis heat exchanger 34 and the three-stage pyrolysis spray tower 32 are circulatedly connected. The first-stage pyrolysis gas induced draft fan 27, the second-stage pyrolysis gas induced draft fan 31 and the third-stage pyrolysis gas induced draft fan 35 are connected in parallel and then connected to the hot air furnace 36. The pyrolysis product conveying spiral 13, the solid-solid separation device 20, the solid-solid separation cyclone 21 and the biochar conveying cooling spiral 22 are connected in sequence. The solid-solid separation device 20 and the hot air furnace 36 and the heat carrier feeding device 6 are connected in sequence.

[0078] The above working principle is as follows: Bamboo powder is used as raw material with a moisture content of 20%. Waste heat flue gas is used to dry it in a tubular dryer 2, reducing its moisture content to below 5%. Simultaneously, it is pneumatically conveyed to the pyrolysis feeding device 5. The material from the pyrolysis feeding device 5 and the heat carrier (530℃) from the heat carrier feeding device 6 enter the primary pyrolysis reactor 7 at a ratio of 10:1 for primary pyrolysis. After primary pyrolysis, the mixture enters the primary pyrolysis buffer chamber 8. The resulting primary pyrolysis products (mainly moisture, organic acids, etc.) are extracted by the primary pyrolysis gas blower 27 and enter the primary pyrolysis spray tower 24. The mixture in the primary pyrolysis buffer chamber 8 then sequentially passes through the secondary pyrolysis reactor 9, the secondary pyrolysis buffer chamber 10, the tertiary pyrolysis reactor 11, and the tertiary pyrolysis spray tower 24. After the pyrolysis buffer chamber 12 has fully reacted, the pyrolysis oil and gas enter the multi-stage spray cooling system for cooling, yielding bio-oil products. The biomass gas is then discharged into the hot air furnace 36 for combustion via the primary pyrolysis gas induced draft fan 27, the secondary pyrolysis gas induced draft fan 31, and the tertiary pyrolysis gas induced draft fan 35. The heat carrier and biochar mixture discharged from the tertiary pyrolysis buffer chamber 12 are separated by the solid-solid separation device 20. The cooled biochar is then transported as a product. The heat carrier enters the hot air furnace 36 for heating and then enters the heat carrier feeding device 6. The flue gas discharged from the hot air furnace 36 is heated by the air preheater 37 and then enters the tubular dryer 2 for raw material drying.

[0079] For details, please refer to the following: Figure 7 and Figure 8 The primary pyrolysis reactor 7, secondary pyrolysis reactor 9, and tertiary pyrolysis reactor 11 have identical specifications and shapes, and internally consist of: a motor reducer 0901, a combined shaft end sealing device 0902, a feed inlet 0903, a discharge outlet 0904, a spiral blade 0905, a long-end stirring blade 0906, a short-end stirring blade 0907, a reactor outer wall 0908, and a spiral shaft 0909. The motor reducer 0901 is installed on one side of the combined shaft end sealing device 0902, and the output end of the motor reducer 0901 is connected to the spiral blade 0905, the long-end stirring blade 0906, and the short-end stirring blade 0907. 7 and the spiral shaft 0909, spiral blades 0905, long-end stirring blades 0906, short-end stirring blades 0907 and spiral shaft 0909 constitute a spiral stirring shaft that is movably connected inside the combined shaft end sealing device 0902. The feed inlet 0903 is located on one side of the top of the combined shaft end sealing device 0902, and the discharge outlet 0904 is located on one side of the bottom of the combined shaft end sealing device 0902. The two combined shaft end sealing devices 0902 and the reactor outer wall 0908 constitute a sealed reactor shell structure. The combined shaft end sealing devices 0902 are installed on the left and right sides of the reactor outer wall 0908.

[0080] Preferably, the height of the long-end stirring blade 0906 is consistent with the height of the spiral blade 0905.

[0081] Preferably, the number of long-end stirring blades 0906 evenly arranged on each radial surface is ≥x, where 2≤x≤5.

[0082] Preferably, the angle between the axial plane of the long-end stirring blade 0906 and the horizontal plane of the shaft is α, where 5°≤α≤45°.

[0083] Preferably, the height of the short-end stirring blade 0907 is 1 / 3 to 2 / 3 of the length of the long-end stirring blade 0906.

[0084] Preferably, the number of short-end stirring blades 0907 evenly arranged on each radial surface is ≥y, where 2≤y≤5.

[0085] Preferably, the angle between the axial plane of the short-end stirring blade 0907 and the horizontal plane of the shaft is β, where 5°≤β≤30°.

[0086] In the biomass graded rapid pyrolysis system of the present invention, the stirring unit composed of spiral blade 0905, long-end stirring blade 0906, short-end stirring blade 0907 and spiral shaft 0909 can expand the contact area with the material and ensure that the material is heated evenly during pyrolysis.

[0087] For details, please refer to the following: Figure 9 The combined shaft end sealing device 0902 internally includes: a cooling shaft sleeve 090201, a cooling water outlet 090202, a nitrogen seal 090203, a nitrogen sealing inlet 090204, a cooling water inlet 090205, an end limiting ring 090206, a first labyrinth seal ring 090207, a sealing packing 090208, and a second labyrinth seal ring 090209. From the material end to the outer end, the combined shaft end sealing device 0902 consists of the end limiting ring 090206, the sealing packing 090208, the first labyrinth seal ring 090207, the sealing packing 090208, the second labyrinth seal ring 090209, and the sealing packing 090208. The cooling shaft sleeve 090201 is fitted onto the first labyrinth seal ring. The nitrogen sealing inlet 090204 is located outside the combined sealing part of the first labyrinth sealing ring 090207, sealing packing 090208, second labyrinth sealing ring 090209, and sealing packing 090208. It is located at the end of the combined sealing part of the first labyrinth sealing ring 090207, sealing packing 090208, second labyrinth sealing ring 090209, and sealing packing 090208, and covers the first labyrinth sealing ring 090207, sealing packing 090208, second labyrinth sealing ring 090209, and sealing packing 090208. The cooling bushing 090201 is provided with a cooling water outlet 090202 and a cooling water inlet 090205, and the nitrogen seal 090203 is provided with a nitrogen sealing inlet 090204.

[0088] Preferably, both the first labyrinth sealing ring 090207 and the second labyrinth sealing ring 090209 are configured with n levels, where n ≥ 3.

[0089] Preferably, the sealing cavity of the first labyrinth sealing ring 090207 and the second labyrinth sealing ring 090209 is r, where r≥2.

[0090] Preferably, the sealing packing 090208 is set at the m level, where m ≥ 2;

[0091] Preferably, the number of sealing rings of the single-stage sealing packing 090208 is s, where s≥4.

[0092] In the biomass graded rapid pyrolysis system of the present invention, a unique design of "nitrogen seal + labyrinth seal + packing seal" is adopted. At the same time, a cooling jacket is designed at the shaft end to reduce the temperature of the shaft end and effectively solve the high temperature sealing problem. Example 2

[0093] Please see Figures 10-18 A drying and feeding device for rapid pyrolysis of biomass is disclosed. The inner wall of the drying and feeding device 1 is equipped with a thermal spray device 101, and a stirring and feeding device 102 is installed inside the drying and feeding device 1 on the outer side of the thermal spray device 101. Material is conveyed to the interior of the drying and feeding device 1 through an inlet pipe 1001 opened at the top of the device. The stirred and dried material is conveyed to the interior of a tubular dryer 2 through an outlet pipe 1002. The stirring and feeding device 102 includes a gear-driven multi-stage stirring structure 1021, which is installed at the top inner wall of the drying and feeding device 1. A metal rod 1022 is connected to the bottom of the gear-driven multi-stage stirring structure 1021, and a gear-driven feeding structure 1023 is connected to the bottom of the metal rod 1022. The gear-driven feeding structure 1023 is movably connected inside the drying and feeding device 1.

[0094] The working principle is as follows: When pyrolyzing biomass materials, the biomass raw materials are first fed into the drying feed device 1, and hot air for drying is injected into the drying feed device 1 through the hot air jet device 101 to perform spray drying treatment on the raw materials inside the drying feed device 1. When drying the biomass raw materials, the gear multi-stirring structure 1021 can be activated to continuously stir the biomass materials in various positions inside the drying feed device 1. Combined with the spraying of drying gas on the materials, the biomass raw materials in each part can be fully dried and heated, improving the processing and drying effect of the biomass raw materials. At the same time, the heated and dried materials can enter the bottom of the drying feed device 1, and the gear multi-stirring structure 1021 drives the next group of biomass materials to perform stirring and drying operations. The dried biomass materials are automatically pushed and moved into the tubular dryer 2 for secondary drying treatment.

[0095] For details, please refer to the following: Figure 13 The thermal spraying device 101 includes a side wall plate 1011, which is installed on the left and right sides of the inner wall of the drying feed device 1. An annular heat pipe body 1012 is installed inside the side wall plate 1011. One end of the annular heat pipe body 1012 extends to the outside of the drying feed device 1 and is connected to the gas control valve 1013. The spray nozzle 1014 is connected to the annular heat pipe body 1012 and is arranged downward.

[0096] In the biomass graded rapid pyrolysis drying and feeding device, when drying biomass is being dried, the drying gas is transmitted to the inside of the annular heat pipe body 1012 through the gas control valve 1013. Under the control of the gas regulating unit inside the annular heat pipe body 1012, the drying gas is sequentially delivered to multiple nozzles 1014 and sprayed out from the inside of the nozzles 1014 to heat and dry the biomass material.

[0097] For details, please refer to the following: Figure 12 , Figure 15 and Figure 17The gear-driven multi-stage stirring structure 1021 includes a linear motor 10211, which is mounted eccentrically at the top of the drying feed device 1 and located on the side of the feed pipe 1001. A synchronous belt 10212 is connected to the outer side of the output end of the linear motor 10211 via a synchronous pulley. The synchronous belt 10212 is movably mounted on the top of the drying feed device 1. A first rotating rod 10213 is connected to the inner side of the synchronous belt 10212 via a synchronous pulley and is movably mounted eccentrically on the inner wall of the drying feed device 1. A first gear 10214 is rotatably connected to the top of the drying feed device 1 on the outer side of the first rotating rod 10213. Multiple first rotating rods 10213 and first gears 10214 are provided. Multiple mixing blades 10215 are installed on the outer side of a rotating rod 10213, and a metal rod 1022 is connected to the bottom of the first rotating rod 10213; an intermediate gear 10216 is meshed with the inner side of the first gear 10214, and the intermediate gear 10216 is rotatably connected to the outer side of the feed pipe 1001; the eccentric part at the bottom of the intermediate gear 10216 is connected to an intermediate rotating rod 10218 through an inclined sleeve 10217, and multiple mixing blades 10215 are installed on the outer side of the intermediate rotating rod 10218; a lower support 10219 is installed inside the drying feed device 1, and multiple through holes are opened inside; the top of the lower support 10219 is rotatably connected to the intermediate rotating rod 10218.

[0098] In the biomass graded rapid pyrolysis drying and feeding device of the present invention, when drying the biomass material, the linear motor 10211 is started to operate, driving the synchronous belt 10212 connected to the outer side of the output end of the linear motor 10211 via a synchronous pulley, causing the first rotating rod 10213 connected to the inner side of the synchronous belt 10212 via the synchronous pulley to rotate. When the first rotating rod 10213 rotates, the first gear 10214 mounted on its top outer side will rotate, driving the intermediate gear 10216 meshing with the side of the first gear 10214 to rotate. At this time, when the intermediate gear 10216 rotates, the inclined sleeve 10217 mounted on its bottom outer side will drive the intermediate rotating rod 10218 mounted on its inner side to rotate, and causing the other first gears 10214 meshing with the outer side of the intermediate gear 10216 to rotate synchronously.

[0099] When the first rotating rod 10213 and the intermediate rotating rod 10218 rotate, the multiple mixing blades 10215 installed on their outer sides will rotate to mix the biomass raw materials.

[0100] For details, please refer to the following: Figure 18The gear feeding structure 1023 includes a lower bevel gear 10231, which is connected to the bottom of the metal rod 1022. A side bevel gear 10232 is meshed with the side of the lower bevel gear 10231. Both the side bevel gear 10232 and the lower bevel gear 10231 are movably connected to the side of the drying feeding device 1. A spiral feeding roller 10233 is connected to the lower bevel gear 10231. The spiral feeding roller 10233 is rotatably connected to the inner bottom of the drying feeding device 1 and is located above the discharge pipe 1002.

[0101] In the biomass graded rapid pyrolysis drying and feeding device of the present invention, when the first rotating rod 10213 rotates, it drives the metal rod 1022 connected to its bottom to rotate, which in turn drives the lower bevel gear 10231 connected to the bottom of the metal rod 1022 to rotate. When the lower bevel gear 10231 rotates, it drives the side bevel gear 10232 meshing with it to rotate, which in turn drives the spiral feeding roller 10233 connected to the side of the side bevel gear 10232 to rotate, thus pushing the drying material located inside the drying and feeding device 1 and discharging it from the discharge pipe 1002.

[0102] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

[0103] The terms “center,” “longitudinal,” “lateral,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are merely simplified descriptions for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0104] Therefore, any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this invention, based on the technical solution and inventive concept of this invention, should be covered within the protection scope of this invention.

Claims

1. A biomass graded rapid pyrolysis system, characterized in that, include: Drying feed device (1), tubular dryer (2), material blower (3), drying cyclone (4), pyrolysis feed device (5), heat carrier feed device (6), primary pyrolysis reactor (7), primary pyrolysis buffer chamber (8), secondary pyrolysis reactor (9), secondary pyrolysis buffer chamber (10), tertiary pyrolysis reactor (11), tertiary pyrolysis buffer chamber (12), pyrolysis product conveying screw (13), primary pyrolysis cyclone (14), primary pyrolysis cyclone carbon powder conveying screw (15), secondary pyrolysis cyclone (16), secondary pyrolysis cyclone carbon powder conveying screw (17), tertiary pyrolysis cyclone (18), tertiary pyrolysis cyclone carbon powder conveying screw (19), solid-solid separation The apparatus includes (20), a solid-solid separation cyclone (21), a biochar conveying and cooling spiral (22), a solid-solid separation fan (23), a primary pyrolysis spray tower (24), a primary pyrolysis spray circulation pump (25), a primary pyrolysis heat exchanger (26), a primary pyrolysis gas induced draft fan (27), a secondary pyrolysis spray tower (28), a secondary pyrolysis spray circulation pump (29), a secondary pyrolysis heat exchanger (30), a secondary pyrolysis gas induced draft fan (31), a tertiary pyrolysis spray tower (32), a tertiary pyrolysis spray circulation pump (33), a tertiary pyrolysis heat exchanger (34), a tertiary pyrolysis gas induced draft fan (35), a hot air furnace (36), an air preheater (37), and a combustion blower (38). The drying system comprises the drying feed device (1), the tubular dryer (2), the material blower (3), and the drying cyclone (4). The pyrolysis system comprises the primary pyrolysis reactor (7), the primary pyrolysis buffer chamber (8), the secondary pyrolysis reactor (9), the secondary pyrolysis buffer chamber (10), the tertiary pyrolysis reactor (11), and the tertiary pyrolysis buffer chamber (12). The pyrolysis system is provided with three layers of pyrolysis structure, and each group of the pyrolysis structure is connected to the primary pyrolysis cyclone. The pyrolysis cyclone charcoal conveying screw (15), the secondary pyrolysis cyclone charcoal conveying screw (17), and the tertiary pyrolysis cyclone charcoal conveying screw (19) are connected. Each pyrolysis structure is connected to the primary pyrolysis spray tower (24), the secondary pyrolysis spray tower (28), and the tertiary pyrolysis spray tower (32). The primary pyrolysis gas induced draft fan (27), the secondary pyrolysis gas induced draft fan (31), and the tertiary pyrolysis gas induced draft fan (35) are connected in parallel and connected to the hot air furnace (36).

2. The biomass graded rapid pyrolysis system according to claim 1, characterized in that: The drying feed device (1), tubular dryer (2), material blower (3), and drying cyclone (4) are connected in sequence. The pyrolysis feed device (5) and heat carrier feed device (6) are located side by side at the top of the primary pyrolysis reactor (7). The primary pyrolysis reactor (7), the primary pyrolysis buffer chamber (8), the secondary pyrolysis reactor (9), the secondary pyrolysis buffer chamber (10), the tertiary pyrolysis reactor (11), the tertiary pyrolysis buffer chamber (12), and the pyrolysis product conveying spiral (13) are connected in sequence.

3. The biomass graded rapid pyrolysis system according to claim 1, characterized in that: The primary pyrolysis reactor (7), the primary pyrolysis cyclone (14), and the primary pyrolysis cyclone carbon powder conveying screw (15) are connected in sequence. The primary pyrolysis cyclone carbon powder conveying screw (15) conveys the separated carbon powder to the interior of the primary pyrolysis buffer chamber (8). The secondary pyrolysis reactor (9), the secondary pyrolysis cyclone (16), and the secondary pyrolysis cyclone carbon powder conveying screw (17) are connected in sequence. The secondary pyrolysis cyclone carbon powder conveying screw (17) conveys the separated carbon powder to the interior of the secondary pyrolysis buffer chamber 10 (10). The three-stage pyrolysis reactor (11), the three-stage pyrolysis cyclone (18) and the three-stage pyrolysis cyclone carbon powder conveying screw (19) are connected in sequence. The three-stage pyrolysis cyclone carbon powder conveying screw (19) conveys the separated carbon powder to the interior of the three-stage pyrolysis buffer chamber (12).

4. The biomass graded rapid pyrolysis system according to claim 1, characterized in that: The first-stage pyrolysis cyclone (14), the first-stage pyrolysis spray tower (24) and the first-stage pyrolysis gas induced draft fan (27) are connected in sequence. The first-stage pyrolysis spray tower (24), the first-stage pyrolysis spray circulating pump (25) and the first-stage pyrolysis heat exchanger (26) are connected in sequence, and the first-stage pyrolysis heat exchanger (26) and the first-stage pyrolysis spray tower (24) are circulated together. The secondary pyrolysis cyclone (16), the secondary pyrolysis spray tower (28) and the secondary pyrolysis gas induced draft fan (31) are connected in sequence. The secondary pyrolysis spray tower (28), the secondary pyrolysis spray circulating pump (29) and the secondary pyrolysis heat exchanger (30) are connected in sequence. The secondary pyrolysis heat exchanger (30) and the secondary pyrolysis spray tower (28) are circulated together. The three-stage pyrolysis cyclone (18), the three-stage pyrolysis spray tower (32), and the three-stage pyrolysis gas induced draft fan (35) are connected in sequence. The three-stage pyrolysis spray tower (32), the three-stage pyrolysis spray circulating pump (33), and the three-stage pyrolysis heat exchanger (34) are connected in sequence. The three-stage pyrolysis heat exchanger (34) and the three-stage pyrolysis spray tower (32) are circulated together. The primary pyrolysis gas induced draft fan (27), the secondary pyrolysis gas induced draft fan (31), and the tertiary pyrolysis gas induced draft fan (35) are connected in parallel and then connected to the hot blast furnace (36). The pyrolysis product conveying spiral (13), solid-solid separation device (20), solid-solid separation cyclone (21) and biochar conveying cooling spiral (22) are connected in sequence, and the solid-solid separation device (20), hot air furnace (36) and heat carrier feeding device (6) are connected in sequence.

5. The biomass graded rapid pyrolysis system according to claim 1, characterized in that: The primary pyrolysis reactor (7), secondary pyrolysis reactor (9), and tertiary pyrolysis reactor (11) have the same specifications and shape, and internally consist of: a motor reducer (0901), a combined shaft end sealing device (0902), a feed inlet (0903), a discharge outlet (0904), a spiral blade (0905), a long-end stirring blade (0906), a short-end stirring blade (0907), a reactor outer wall (0908), and a spiral shaft (0909). The combined shaft end sealing device (0902) is equipped with a motor reducer (0901) on one side. The output end of the motor reducer (0901) is connected to a spiral blade (0905), a long-end stirring blade (0906), a short-end stirring blade (0907), and a spiral shaft (0909). The spiral blade (0905), the long-end stirring blade (0906), the short-end stirring blade (0907), and the spiral shaft (0909) constitute a spiral stirring shaft that is movably connected inside the combined shaft end sealing device (0902). The feed inlet (0903) is located on one side of the top of the combined shaft end sealing device (0902), and the discharge port (0904) is located on one side of the bottom of the combined shaft end sealing device (0902). The two combined shaft end sealing devices (0902) and the reactor outer wall (0908) constitute a sealed reactor shell structure. The combined shaft end sealing devices (0902) are installed on the left and right sides of the reactor outer wall (0908).

6. The biomass graded rapid pyrolysis system according to claim 5, characterized in that: The combined shaft end sealing device (0902) includes the following internal components: a cooling shaft sleeve (090201), a cooling water outlet (090202), a nitrogen seal (090203), a nitrogen sealing inlet (090204), a cooling water inlet (090205), an end limiting ring (090206), a first labyrinth sealing ring (090207), a sealing filler (090208), a second labyrinth sealing ring (090209), and a sealing filler (090208). The combined shaft end sealing device (0902) consists of, from the material end to the outer end, an end limiting ring (090206), sealing packing (090208), a first labyrinth sealing ring (090207), sealing packing (090208), a second labyrinth sealing ring (090209), and sealing packing (090208). The cooling shaft sleeve (090201) is fitted onto the first labyrinth sealing ring (090207), the sealing packing (090208), and the second labyrinth sealing ring (090209). The nitrogen sealing inlet (090204) is located on the outside of the combined sealing portion of the first labyrinth sealing ring (090207) and sealing packing (090208) and the second labyrinth sealing ring (090209) and sealing packing (090208), and is positioned at the end of the combined sealing portion of the first labyrinth sealing ring (090207) and sealing packing (090208) and the second labyrinth sealing ring (090209) and sealing packing (090208), and covers the first labyrinth sealing ring (090207) and sealing packing (090208) and the second labyrinth sealing ring (090209) and sealing packing (090208). The cooling bushing (090201) is provided with a cooling water outlet (090202) and a cooling water inlet (090205), and the nitrogen seal (090203) is provided with a nitrogen sealing inlet (090204).

7. A drying and feeding device for rapid biomass pyrolysis, used in a rapid biomass pyrolysis system according to any one of claims 1-6, characterized in that, A thermal spraying device (101) is installed on the inner wall of the drying feed device (1), and a stirring and feeding device (102) is installed on the outside of the thermal spraying device (101) inside the drying feed device (1). The material is transported to the inside of the drying feed device (1) through an inlet pipe (1001) opened at the top of the drying feed device (1), and the material that has been stirred and dried is transported to the inside of the tubular dryer (2) through the outlet pipe (1002). The mixing and feeding device (102) includes a gear multi-mixing structure (1021), which is installed on the inner top of the drying feeding device (1). A metal rod (1022) is connected to the bottom of the gear multi-mixing structure (1021), and a gear feeding structure (1023) is connected to the bottom of the metal rod (1022). The gear feeding structure (1023) is movably connected inside the drying feeding device (1).

8. A drying and feeding device for rapid biomass grading and pyrolysis according to claim 7, characterized in that: The thermal spray device (101) includes: Side wall plate (1011) is installed on the left and right sides of the inner wall of the drying feed device (1). An annular heat pipe (1012) is installed inside the side wall plate (1011). One end of the annular heat pipe (1012) extends to the outside of the drying feed device (1) and is connected to the gas control valve (1013). The nozzle (1014) is connected to the annular heat pipe body (1012) and is positioned downwards.

9. A drying and feeding device for rapid biomass grading and pyrolysis according to claim 7, characterized in that: The gear-driven multi-stirring structure (1021) includes: A linear motor (10211) is installed at the eccentric position on the top of the drying feed device (1) and located on the side of the feed pipe (1001). A synchronous belt (10212) is connected to the outer side of the output end of the linear motor (10211) through a synchronous pulley. The synchronous belt (10212) is movably arranged on the top of the drying feed device (1). The first rotating rod (10213) is connected to the inner side of the synchronous belt (10212) via a synchronous pulley and is movably set at the eccentric position of the inner wall of the drying feed device (1). The outer side of the first rotating rod (10213) is equipped with a first gear (10214) that is rotatably connected to the top of the drying feed device (1). The first rotating rod (10213) and the first gear (10214) are provided in multiple ways. Multiple mixing blades (10215) are installed on the outer side of the first rotating rod (10213). A metal rod (1022) is connected to the bottom of one of the first rotating rods (10213). An intermediate gear (10216) is meshed with the inner side of the first gear (10214). The intermediate gear (10216) is rotatably connected to the outer side of the feed pipe (1001). An intermediate rotating rod (10218) is connected to the eccentric part at the bottom of the intermediate gear (10216) through an inclined sleeve (10217). Multiple mixing blades (10215) are installed on the outer side of the intermediate rotating rod (10218). The lower support base (10219) is installed inside the drying feed device (1) and has multiple through holes. The top of the lower support base (10219) is rotatably connected to the intermediate rotating rod (10218).

10. A drying and feeding device for rapid biomass grading and pyrolysis according to claim 7, characterized in that: The gear feeding structure (1023) includes: The lower bevel gear (10231) is connected to the bottom of the metal rod (1022). The side of the lower bevel gear (10231) is meshed with a side bevel gear (10232). Both the side bevel gear (10232) and the lower bevel gear (10231) are movably connected to the side of the drying feed device (1). The spiral feed roller (10233) is connected to the lower bevel gear (10231). The spiral feed roller (10233) is rotatably connected to the inner bottom of the drying feed device (1) and located above the discharge pipe (1002).

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