Biomass high-temperature pyrolysis auger group and skid-mounted biomass high-temperature pyrolysis device

Abstract

The invention discloses a biomass high-temperature pyrolysis auger group and a skid-mounted biomass high-temperature pyrolysis device, belongs to the technical field of biomass treatment, and aims to solve the problems of low treatment capacity and high energy consumption of the skid-mounted biomass high-temperature pyrolysis device in the prior art. The biomass high-temperature pyrolysis auger group comprises a plurality of pyrolysis auger pipes which are arranged in parallel; each pyrolysis auger pipe comprises a pyrolysis pipe body, a pyrolysis auger blade and a pyrolysis rotating shaft, the pyrolysis auger blade and the pyrolysis rotating shaft are arranged in the pyrolysis pipe body, the outer wall of the pyrolysis rotating shaft is sleeved with the pyrolysis auger blade, and the multiple pyrolysis pipe bodies are connected end to end to form a zigzag biomass conveying pipeline; the spiral directions of every two adjacent pyrolysis auger blades are opposite, and the pyrolysis auger blades are driven by the pyrolysis rotating shaft to rotate. The device can be used for high-temperature pyrolysis of biomass.

Description

Technical Field

[0001] The present invention belongs to the technical field of biomass processing, and in particular relates to a biomass high-temperature pyrolysis auger group and a skid-mounted biomass high-temperature pyrolysis device. Background Art

[0002] High-temperature pyrolysis (e.g., high-temperature pyrolysis) technology is an important means to convert biomass into high-value-added products and energy.

[0003] High-temperature pyrolysis usually uses a skid-mounted biomass high-temperature pyrolysis device, which has the advantages of short on-site installation time, easy movement and rearrangement, high flexibility, and the ability to achieve continuous input of materials and continuous output of products.

[0004] However, existing skid-mounted biomass high-temperature pyrolysis devices mostly use a rotary kiln structure. On the one hand, since the rotary kiln relies on the rotation of the cylinder to achieve material turning and heat exchange, the heat transfer efficiency is low, resulting in slow heating and limited processing capacity. In order to maintain the reaction temperature, a large amount of external energy needs to be continuously consumed, especially when processing high-moisture content materials, the energy consumption cost increases sharply. Summary of the Invention

[0005] In view of the above analysis, the present invention aims to provide a biomass high-temperature pyrolysis auger group and a skid-mounted biomass high-temperature pyrolysis device to solve the problems of low processing capacity and high energy consumption of skid-mounted biomass high-temperature pyrolysis devices in the prior art.

[0006] The purpose of the present invention is mainly achieved through the following technical solutions.

[0007] The present invention provides a biomass high-temperature pyrolysis auger group, comprising a plurality of pyrolysis auger tubes arranged in parallel;

[0008] The pyrolysis auger pipe includes a pyrolysis pipe body, pyrolysis auger blades and a pyrolysis shaft arranged in the pyrolysis pipe body, the pyrolysis auger blades are sleeved on the outer wall of the pyrolysis shaft, and multiple pyrolysis pipe bodies are connected end to end to form a zigzag biomass transportation pipeline;

[0009] The spiral directions of two adjacent pyrolysis auger blades are opposite, and the pyrolysis auger blades are driven to rotate by the pyrolysis shaft.

[0010] Furthermore, a plurality of pyrolysis auger tubes are arranged in parallel.

[0011] Furthermore, the biomass high-temperature pyrolysis auger group further includes a cooling auger pipe, which is arranged in parallel with the pyrolysis auger pipe;

[0012] The cooling auger tube includes a cooling tube body and cooling auger blades and a cooling shaft arranged in the cooling tube body. The cooling auger blades are sleeved on the outer wall of the cooling shaft. The feed end of the cooling tube body is connected to the discharge end of the last pyrolysis tube body. The spiral direction of the cooling auger blades is opposite to the spiral direction of the last pyrolysis auger blade.

[0013] Furthermore, the cooling tube body includes a cooling inner layer and a cooling outer layer sleeved outside the cooling inner layer. There is a gap between the cooling inner layer and the cooling outer layer, and the gap serves as a circulation cavity for the cooling medium.

[0014] Furthermore, a liquid inlet is provided at the bottom end of one side of the circulation cavity, and a liquid outlet is provided at the top end of the other side.

[0015] Furthermore, the biomass high-temperature pyrolysis auger group also includes a pyrolysis gas collection pipe group for collecting pyrolysis gas discharged from the biomass high-temperature pyrolysis auger group.

[0016] Furthermore, the pyrolysis gas collecting pipe group includes a main collecting pipe, a pyrolysis collecting pipe and a cooling collecting pipe;

[0017] The air inlet end of the pyrolysis collection pipe is connected to the air outlet end of the pyrolysis auger pipe, the cooling collection pipe is connected to the air outlet end of the cooling auger pipe, and the air outlet ends of the pyrolysis collection pipe and the cooling collection pipe are both connected to the air inlet end of the main collection pipe.

[0018] Furthermore, the biomass high-temperature pyrolysis auger group also includes a driving component for driving multiple pyrolysis shafts and cooling shafts to rotate synchronously.

[0019] Furthermore, the driving assembly includes a driving motor, a speed reducer and a synchronous pulley;

[0020] The output shaft of the driving motor is connected to the input end of the synchronous pulley through a reducer, and the output end of the synchronous pulley is connected to a plurality of pyrolysis rotating shafts and a cooling rotating shaft respectively.

[0021] The present invention also provides a skid-mounted biomass high-temperature pyrolysis device, comprising the above-mentioned biomass high-temperature pyrolysis auger group.

[0022] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0023] The biomass high-temperature pyrolysis auger group provided by the present invention adopts a plurality of pyrolysis auger tubes arranged in parallel, and the spiral directions of two adjacent pyrolysis auger blades are opposite, thereby realizing multi-return movement of biomass, and the biomass can exchange heat with the high-temperature flue gas multiple times, thereby extending the heat exchange time between the biomass and the high-temperature flue gas, and then extending the pyrolysis time of the biomass, improving the heat transfer efficiency, reducing the energy consumption cost, and improving the high-temperature pyrolysis efficiency and high-temperature pyrolysis quality of the biomass; in addition, since the plurality of pyrolysis auger tubes are arranged in parallel, on the basis of extending the high-temperature pyrolysis path, the overall length and installation space of the high-temperature pyrolysis auger group can also be reduced.

[0024] In the present invention, the above-mentioned technical solutions can be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages will become apparent from the description or be understood through practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the embodiments of the description and the contents particularly pointed out in the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0026] Figure 1 A schematic structural diagram of a biomass high-temperature pyrolysis auger assembly provided in Example 1 of the present invention;

[0027] Figure 2 This is a schematic structural diagram of a skid-mounted biomass high-temperature pyrolysis device provided in Example 2 of the present invention;

[0028] Figure 3 A schematic diagram of the positional relationship between the biomass high-temperature pyrolysis auger group and the high-temperature pyrolysis furnace in the skid-mounted biomass high-temperature pyrolysis device provided in Example 2 of the present invention;

[0029] Figure 4 This is a schematic structural diagram of a pyrolysis gas burner in a skid-mounted biomass high-temperature pyrolysis device provided in Example 2 of the present invention.

[0030] Reference numerals:

[0031] 1-first pyrolysis tube; 2-first pyrolysis auger blade; 3-first pyrolysis shaft; 4-second pyrolysis tube; 5-second pyrolysis auger blade; 6-second pyrolysis shaft; 7-third pyrolysis tube; 8-third pyrolysis auger blade; 9-third pyrolysis shaft; 10-fourth pyrolysis tube; 11-fourth pyrolysis auger blade; 12-fourth pyrolysis shaft; 13-cooling tube; 14-cooling auger blade; 15-cooling shaft; 16-preheating burner; 17-drive motor; 18-reducer; 19-driving wheel; 20-transmission belt; 21-driven wheel; 22-total gear; 23-first pyrolysis synchronization chain; 24-second pyrolysis synchronization chain; 25-third pyrolysis Synchronization chain; 26-fourth pyrolysis synchronization chain; 27-first pyrolysis transfer gear; 28-second pyrolysis transfer gear; 29-third pyrolysis transfer gear; 30-fourth pyrolysis transfer gear; 31-linkage gear; 32-cooling synchronization chain; 33-cooling transfer gear; 34-skid-mounted platform; 35-high-temperature pyrolysis furnace; 36-heat storage buffer tank; 37-pyrolysis gas burner; 371-combustible gas inlet pipe; 372-inner tube; 373-outer tube; 374-flue gas outlet pipe; 375-igniter; 376-central diffusion cone; 377-cyclone blade; 378-main air inlet; 379-cyclone air hole; 38-cyclone separator; 39-exhaust dust removal box; 40-scattering tube. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0033] Example 1

[0034] This embodiment provides a biomass high temperature pyrolysis auger group, see Figure 1 , including multiple pyrolysis auger tubes arranged in parallel, the pyrolysis auger tube includes a pyrolysis tube body and pyrolysis auger blades and a pyrolysis shaft arranged in the pyrolysis tube body, the pyrolysis auger blades are sleeved on the outer wall of the pyrolysis shaft, and in two adjacent pyrolysis auger tubes, the discharge port of the pyrolysis tube body located above is connected to the feed port of the pyrolysis tube body located below, that is, multiple pyrolysis tube bodies are connected end to end to form a zigzag biomass conveying pipeline; the spiral directions of two adjacent pyrolysis auger blades are opposite, and the pyrolysis auger blades are driven to rotate by the pyrolysis shaft to realize the conveying of biomass.

[0035] Exemplarily, the number of pyrolysis auger tubes is 4, namely the first pyrolysis auger tube, the second pyrolysis auger tube, the third pyrolysis auger tube and the fourth pyrolysis auger tube. The first pyrolysis auger tube includes a first pyrolysis tube body 1, a first pyrolysis auger blade 2 and a first pyrolysis rotating shaft 3. The second pyrolysis auger tube includes a second pyrolysis tube body 4, a second pyrolysis auger blade 5 and a second pyrolysis rotating shaft 6. The third pyrolysis auger tube includes a third pyrolysis tube body 7, a third pyrolysis auger blade 8 and a third pyrolysis rotating shaft 9. The fourth pyrolysis auger tube includes a fourth pyrolysis tube body 10, a fourth pyrolysis auger blade 11 and a fourth pyrolysis rotating shaft 12.

[0036] During implementation, biomass is fed into the high-temperature pyrolysis auger group from the feed end of the first pyrolysis tube body 1, and is driven by the first pyrolysis auger blade 2 to the discharge end of the first pyrolysis tube body 1; the discharge end of the first pyrolysis tube body 1 is connected to the feed end of the second pyrolysis tube body 4, and biomass is fed from the discharge end of the first pyrolysis tube body 1 into the feed end of the second pyrolysis tube body 4, and is driven by the second pyrolysis auger blade 5 to the discharge end of the second pyrolysis tube body 4; the discharge end of the second pyrolysis tube body 4 is connected to the feed end of the third pyrolysis tube body 7, and biomass is fed from the discharge end of the second pyrolysis tube body 4 into the feed end of the third pyrolysis tube body 7. The biomass is supplied from the discharge end of the third pyrolysis tube 7 to the feed end of the fourth pyrolysis tube 10, and is driven by the fourth pyrolysis auger blade 11 to the discharge end of the fourth pyrolysis tube 10. During the transportation process of the first pyrolysis tube 1, the second pyrolysis tube 4, the third pyrolysis tube 7 and the fourth pyrolysis tube 10, the biomass transfers heat with the high-temperature flue gas to achieve pyrolysis.

[0037] Compared with the existing technology, the biomass high-temperature pyrolysis auger group provided in this embodiment adopts multiple pyrolysis auger tubes arranged in parallel, and the spiral directions of two adjacent pyrolysis auger blades are opposite, so that multi-return movement of biomass can be achieved. Biomass can exchange heat with high-temperature flue gas multiple times, extending the heat exchange time between biomass and high-temperature flue gas, thereby extending the pyrolysis time of biomass, improving heat transfer efficiency, reducing energy consumption costs, and improving the high-temperature pyrolysis efficiency and high-temperature pyrolysis quality of biomass; in addition, since multiple pyrolysis auger tubes are arranged in parallel, on the basis of extending the high-temperature pyrolysis path, the overall length and installation space of the high-temperature pyrolysis auger group can also be reduced.

[0038] In order to cool down the biomass after high-temperature pyrolysis, the above-mentioned biomass high-temperature pyrolysis auger group also includes a cooling auger pipe, which is arranged in parallel with the pyrolysis auger pipe. The cooling auger pipe includes a cooling tube body 13 and cooling auger blades 14 and a cooling shaft 15 arranged in the cooling tube body 13. The cooling auger blades 14 are sleeved on the outer wall of the cooling shaft 15. The feed end of the cooling tube body 13 is connected to the discharge end of the last pyrolysis tube body (i.e., the fourth pyrolysis tube body 10). The spiral direction of the cooling auger blades 14 is opposite to the spiral direction of the last pyrolysis auger blade. The biomass after high-temperature pyrolysis is cooled by the cooling auger pipe.

[0039] In order to enable the supply of cooling medium, the above-mentioned cooling tube body 13 is a sandwich structure, including a cooling inner layer and a cooling outer layer sleeved outside the cooling inner layer. There is a gap between the cooling inner layer and the cooling outer layer, and the gap serves as a circulation cavity for the cooling medium. A liquid inlet is opened at the bottom end of one side of the circulation cavity, and a liquid outlet is opened at the top end of the other side.

[0040] It is understandable that biomass will produce pyrolysis gas (for example, carbon monoxide and hydrogen) during the pyrolysis process. In order to achieve the emission of pyrolysis gas, the above-mentioned biomass high-temperature pyrolysis auger group also includes a pyrolysis gas collection pipe group. Specifically, the pyrolysis gas collection pipe group includes a main collection pipe, a pyrolysis collection pipe and a cooling collection pipe. The air inlet end of the pyrolysis collection pipe is connected to the air outlet end of the pyrolysis auger pipe, and the cooling collection pipe is connected to the air outlet end of the cooling auger pipe. The air outlet ends of the pyrolysis collection pipe and the cooling collection pipe are both connected to the air inlet end of the main collection pipe. The pyrolysis gas generated in multiple pyrolysis auger pipes and cooling auger pipes is discharged through the pyrolysis gas collection pipe group.

[0041] In order to simplify the structure of the high-temperature pyrolysis auger group and realize the rotation of multiple pyrolysis shafts and cooling shafts 15 at the same time, the above-mentioned biomass high-temperature pyrolysis auger group also includes a drive component for driving multiple pyrolysis shafts and cooling shafts 15 to rotate synchronously.

[0042] Specifically, the drive assembly includes a drive motor 17, a reducer 18, and a synchronous pulley. The output shaft of the drive motor 17 is connected to the input end of the synchronous pulley through the reducer 18, and the output end of the synchronous pulley is respectively connected to multiple pyrolysis shafts and cooling shafts 15. In this way, the drive motor 17 drives the multiple pyrolysis shafts and cooling shafts 15 to rotate synchronously through the reducer 18 and the synchronous pulley, thereby realizing the transportation of biomass in the high-temperature pyrolysis auger group.

[0043] In order to realize the connection between the drive motor 17 and the reducer 18, the above-mentioned drive assembly also includes a driving wheel 19, a transmission belt 20 and a driven wheel 21. The driving wheel 19 is coaxially fixedly connected to the output shaft of the drive motor 17, and the driven wheel 21 is coaxially fixedly connected to the input shaft of the reducer 18. One end of the transmission belt 20 is sleeved on the outer wall of the driving wheel 19, and the other end of the transmission belt 20 is sleeved on the outer wall of the driven wheel 21.

[0044] Taking the number of pyrolysis auger tubes as 4 as an example, the structure of the synchronous pulley, specifically, includes a total drive gear 22, a first pyrolysis synchronization chain 23, a second pyrolysis synchronization chain 24, a third pyrolysis synchronization chain 25, a fourth pyrolysis synchronization chain 26, a first pyrolysis transfer gear 27, a second pyrolysis transfer gear 28, a third pyrolysis transfer gear 29, a fourth pyrolysis transfer gear 30, a linkage gear 31, a cooling synchronization chain 32 and a cooling transfer gear 33. The first pyrolysis transfer gear 27 is coaxially fixedly connected to one end of the first pyrolysis shaft 3, the second pyrolysis transfer gear 28 is coaxially fixedly connected to one end of the second pyrolysis shaft 6, the third pyrolysis transfer gear 29 is coaxially fixedly connected to one end of the third pyrolysis shaft 9, the fourth pyrolysis transfer gear 30 is coaxially fixedly connected to one end of the fourth pyrolysis shaft 12, the linkage gear 31 is coaxially fixedly connected to the other end of the fourth pyrolysis shaft 12, and the cooling transfer gear 33 is coaxially fixedly connected to one end of the cooling shaft 15.

[0045] The total gear 22 is coaxially fixedly connected to the output shaft of the reducer 18, one end of the second pyrolysis synchronization chain 24 and one end of the third pyrolysis synchronization chain 25 are both sleeved on the outer wall of the total gear 22, the other end of the second pyrolysis synchronization chain 24 is sleeved on the outer wall of the second pyrolysis transfer gear 28, the other end of the third pyrolysis synchronization chain 25 is sleeved on the outer wall of the third transfer gear, one end of the first pyrolysis synchronization chain 23 is sleeved on the outer wall of the second transfer gear, the other end of the first pyrolysis synchronization chain 23 is sleeved on the outer wall of the first transfer gear, and one end of the fourth pyrolysis synchronization chain 26 is sleeved on the outer wall of the third transfer gear. The outer wall of the gear, the other end of the fourth pyrolysis synchronization chain 26 is sleeved on the outer wall of the fourth pyrolysis transfer gear 30, one end of the cooling synchronization chain 32 is sleeved on the outer wall of the linkage gear 31, and the other end of the cooling synchronization chain 32 is sleeved on the outer wall of the cooling transfer gear 33. With this structure, a drive motor 17 is used to realize the synchronous rotation of the first pyrolysis auger tube, the second pyrolysis auger tube, the third pyrolysis auger tube, the fourth pyrolysis auger tube and the cooling auger tube, which can effectively improve the structural compactness and transmission efficiency of the drive component, reduce the number of power units, and reduce costs and maintenance difficulties.

[0046] Example 2

[0047] This embodiment provides a skid-mounted biomass high-temperature pyrolysis device. Figure 2 , including the biomass high-temperature pyrolysis auger group provided in Example 1.

[0048] It should be noted that the high-temperature pyrolysis in this embodiment specifically refers to carbonization, that is, the above-mentioned skid-mounted biomass high-temperature pyrolysis device is a skid-mounted biomass carbonization device.

[0049] Compared with the prior art, the beneficial effects of the skid-mounted biomass high-temperature pyrolysis device provided in this embodiment are substantially the same as the beneficial effects of the biomass high-temperature pyrolysis auger group provided in Example 1, and are not described in detail here.

[0050] It can be understood that in order to achieve high-temperature pyrolysis, the above-mentioned skid-mounted biomass high-temperature pyrolysis device also includes a skid-mounted platform 34 and a high-temperature pyrolysis furnace 35, a heat storage buffer tank 36, a pyrolysis gas burner 37, a cyclone separator 38 and an exhaust gas dust removal box 39 arranged on the skid-mounted platform 34, and the high-temperature pyrolysis auger group is arranged in the high-temperature pyrolysis furnace 35.

[0051] The pyrolysis gas outlet of the high-temperature pyrolysis furnace 35 and the pyrolysis gas outlet of the cooling auger pipe are connected to the pyrolysis gas burner 37 and the heat storage buffer tank 36 in sequence. The pyrolysis gas generated by the high-temperature pyrolysis furnace 35 and the cooling auger pipe is burned by the pyrolysis gas burner 37 to generate high-temperature flue gas, and returns to the high-temperature pyrolysis furnace 35 through the heat storage buffer tank 36 to provide heat for high-temperature pyrolysis of biomass. The exhaust gas outlet of the high-temperature pyrolysis furnace 35 is connected to the cyclone separator 38 and the exhaust dust removal box 39 in sequence, and the exhaust gas is discharged into the atmosphere from the chimney after dust removal.

[0052] In this way, on the one hand, the pyrolysis gas generated by the high-temperature pyrolysis of biomass is burned to realize the pyrolysis heat supply of the biomass in the high-temperature pyrolysis furnace 35. Only a small amount of natural gas needs to be burned in the initial stage of operation to generate the initial high-temperature pyrolysis heat required by the biomass. The subsequent operation of the device can use the pyrolysis gas generated by itself to achieve heat self-sufficiency, reduce external energy consumption, reduce operating costs, and save energy and protect the environment. On the other hand, a skid-mounted integrated design is adopted, and all components are integrated on the skid-mounted platform 34 with a reasonable layout. It can be directly loaded on trucks, railway trucks or cargo ships, avoiding the tedious process of disassembly and transportation of traditional large-scale equipment, facilitating overall installation and movement, greatly reducing the floor space, adapting to the needs of different sites, and convenient transportation and installation.

[0053] Illustratively, the high-temperature pyrolysis furnace 35 is arranged on one side of the skid-mounted platform 34 , and the heat storage buffer tank 36 , the pyrolysis gas burner 37 , the cyclone separator 38 and the exhaust gas dust removal box 39 are arranged in sequence in a direction gradually away from the high-temperature pyrolysis furnace 35 .

[0054] Among them, see Figure 3The upper end of the high-temperature pyrolysis auger group is fixedly connected to one side of the high-temperature pyrolysis furnace 35, and the lower end of the high-temperature pyrolysis auger group is fixedly connected to the other side of the high-temperature pyrolysis furnace 35. The high-temperature pyrolysis auger group is tilted. The high-temperature pyrolysis auger group divides the inner cavity of the high-temperature pyrolysis furnace 35 into an upper furnace chamber and a lower furnace chamber from top to bottom. A scattering tube 40 is provided in the lower furnace chamber, and the air inlet end of the radiator tube 40 is connected to the air outlet of the heat storage buffer tank 36. In this way, when the biomass moves in the high-temperature pyrolysis auger assembly, the high-temperature flue gas in the heat storage buffer tank 36 is supplied to the lower furnace chamber through the scattering tube 40. The high-temperature flue gas heats the biomass in the high-temperature pyrolysis auger assembly, causing the biomass to be pyrolyzed at high temperature. The low-temperature flue gas after heat exchange with the biomass enters the upper furnace chamber and is discharged from the upper furnace chamber through the exhaust gas collection pipe, and enters the subsequent cyclone separator 38 and the exhaust gas dust removal box 39 for dust removal and purification.

[0055] Among them, the structure of the high-temperature pyrolysis furnace 35, specifically, includes a furnace body and an insulation layer and a refractory layer sequentially arranged on the inner wall of the furnace body. A biomass feed port is opened on the top of the furnace body, and the biomass feed port is connected to the feed end of the high-temperature pyrolysis auger group, thereby ensuring the overall structural strength, thermal insulation and refractory properties of the high-temperature pyrolysis furnace 35.

[0056] Specifically, the structure of the scattering tube 40 includes a planar bottom wall and a first, second, third, and constant diameter walls disposed on and sequentially connected to the planar bottom wall. The planar bottom wall, the first, second, third, and constant diameter walls form a tubular structure comprised of multiple eccentric reducers. Scattering holes are provided in the first, second, third, and constant diameter walls. The end of the first, second, third, and constant diameter walls serves as the air inlet end of the scattering tube 40. This structure of the scattering tube 40 ensures uniform flue gas supply, thereby improving the uniformity of biomass pyrolysis.

[0057] It is understandable that during the operation of the device, a small amount of natural gas needs to be supplied into the furnace body and ignited. Therefore, the above-mentioned high-temperature pyrolysis furnace 35 also includes a preheating burner 16, the gas outlet of the preheating burner 16 is connected to the furnace body, and the high-temperature flue gas generated by the preheating burner 16 is supplied to the furnace body to achieve pre-pyrolysis and pre-high-temperature pyrolysis of the biomass.

[0058] For the structure of the preheat burner 16 and the pyrolysis gas burner 37, see Figure 4, both include a combustible gas inlet pipe 371, an inner tube 372, an outer tube 373, a flue gas outlet pipe 374 and an igniter 375. The combustible gas inlet pipe 371, the inner tube 372 and the flue gas outlet pipe 374 are connected in sequence. The inner tube 372 is arranged in the outer tube 373 and is coaxially fixedly connected to the outer tube 373. The inner tube 372 is provided with a central diffusion cone 376 and a cyclone blade 377 coaxially arranged with the inner tube 372. There is a gap between the outer wall of the central diffusion cone 376 and the inner wall of the inner tube 372. The cyclone blade 377 is sleeved on the outer wall of the central diffusion cone 376. The inner end of the cyclone blade 377 is fixed to the inner wall of the inner tube 372. The central diffusion cone 376 is fixedly connected, and the outer end of the cyclone blade 377 is fixedly connected to the inner wall of the inner cylinder 372. The cyclone blade 377 is located in the gap between the outer wall of the central diffusion cone 376 and the inner wall of the inner cylinder 372. The side walls of the inner cylinder 372 are respectively provided with multiple cyclone holes 379, and the side walls of the outer cylinder 373 are provided with a main air port 378 (air inlet). There is a gap between the inner cylinder 372 and the outer cylinder 373. The main air port 378, the gap between the inner cylinder 372 and the outer cylinder 373 and the cyclone holes 379 constitute a cyclone channel, and the ignition end of the igniter 375 extends into the inner cylinder 372.

[0059] It should be noted that the central diffusion cone 376 is set with its large end facing the flame direction, which can also block the flame and prevent the flame from flowing back to another layer of the central diffusion cone 376, thereby ensuring the combustion safety of the preheating burner 16 and the pyrolysis gas burner 37.

[0060] It should be noted that the combustible gas refers to pyrolysis gas or natural gas. Specifically, for the preheating burner 16, the combustible gas is natural gas, and for the pyrolysis gas burner 37, the combustible gas is pyrolysis gas.

[0061] Exemplarily, the outer cylinder 373 is a constant diameter cylinder structure, the combustible gas inlet pipe 371 and the flue gas outlet pipe 374 are constant diameter pipes, the inner cylinder 372 includes an expanded diameter section, a reduced diameter section and a constant diameter section connected in sequence along the flow direction of the combustible gas, the central diffusion cone 376 and the cyclone blades 377 are both arranged in the expanded diameter section, the cyclone holes 379 are arranged on the side wall of the expanded diameter section, and are located on the side of the cyclone blades 377 away from the combustible gas inlet pipe 371, and the igniter 375 is located on the side of the cyclone blades 377 away from the combustible gas inlet pipe 371.

[0062] Thus, on the one hand, due to the provision of the expanded diameter section and the fact that the outer cylinder 373 is a constant diameter section, when air is supplied from the main air inlet 378 into the gap between the inner cylinder 372 and the outer cylinder 373, the cross-section of the gap gradually decreases, causing the air flow rate to continuously increase, and the air flows through the cyclone holes 379 to form a high-speed swirl of air that is supplied to the outer cylinder 373. On the other hand, due to the provision of the central diffusion cone 376, the flow cross-section of the combustible gas can also be reduced, increasing the flow rate of the combustible gas, reducing the increase in flow resistance caused by the provision of the cyclone blades 377, and allowing the combustible gas to flow smoothly through the cyclone blades 377. In summary, the use of the specific structure of the outer cylinder 373 and the inner cylinder 372, as well as the specific positions of the various components, can increase the air flow rate and the combustible gas flow rate on the basis of realizing the nested structure of the outer cylinder 373 and the inner cylinder 372, thereby forming two high-speed swirls and achieving sufficient mixing of the air and combustible gas.

[0063] It is worth noting that due to the generation of two high-speed vortexes, the air pressure at the position of the inner cylinder 372 close to the axis may be reduced, and the concentration of the combustible gas and air here is low, which affects the combustion uniformity in the inner cylinder 372. Therefore, the above-mentioned preheating burner 16 and the pyrolysis gas burner 37 also include a double-helix central air supply pipe group. Specifically, the central air supply pipe group is located in the inner cylinder 372 and is coaxially arranged with the inner cylinder 372. The central air supply pipe group includes a spiral combustible gas supply pipe and a spiral air supply pipe, which are intertwined to form a double-helix structure. A plurality of combustible gas spray holes are opened on the combustible gas supply pipe, and the gas outlet direction of the combustible gas spray holes is perpendicular to the side wall of the combustible gas supply pipe. A plurality of air spray holes are opened on the air supply pipe, and the gas outlet direction of the air spray holes is perpendicular to the side wall of the air supply pipe. The combustible gas ejected from the combustible gas spray holes has the same swirl direction as the combustible gas flowing out of the cyclone blades 377, and the air ejected from the air spray holes has the same swirl direction as the air supply flowing out of the cyclone holes 379. In this way, the double-helix central air supply pipe group can effectively compensate for the problem of low concentration of combustible gas and air in the central area and improve the uniformity of combustion. At the same time, the combustible gas ejected from the combustible gas nozzle and the air ejected from the air nozzle are still two swirls, further improving the overall swirl of the airflow in the inner tube 372.

[0064] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A biomass high temperature pyrolysis auger group, characterized in that: It includes a plurality of pyrolysis auger tubes arranged in parallel; The pyrolysis auger pipe includes a pyrolysis pipe body, pyrolysis auger blades and a pyrolysis shaft arranged in the pyrolysis pipe body, the pyrolysis auger blades are sleeved on the outer wall of the pyrolysis shaft, and multiple pyrolysis pipe bodies are connected end to end to form a zigzag biomass transportation pipeline; The spiral directions of two adjacent pyrolysis auger blades are opposite, and the pyrolysis auger blades are driven to rotate by the pyrolysis shaft.

2. The biomass high temperature pyrolysis auger group according to claim 1, characterized in that: Multiple pyrolysis auger tubes are arranged in parallel.

3. The biomass high temperature pyrolysis auger group according to claim 1, characterized in that: The biomass high-temperature pyrolysis auger group further includes a cooling auger pipe, which is arranged in parallel with the pyrolysis auger pipe; The cooling auger tube includes a cooling tube body and cooling auger blades and a cooling shaft arranged in the cooling tube body. The cooling auger blades are sleeved on the outer wall of the cooling shaft. The feed end of the cooling tube body is connected to the discharge end of the last pyrolysis tube body. The spiral direction of the cooling auger blades is opposite to the spiral direction of the last pyrolysis auger blades.

4. The biomass high temperature pyrolysis auger group according to claim 3, characterized in that: The cooling tube body comprises a cooling inner layer and a cooling outer layer sleeved on the cooling inner layer. There is a gap between the cooling inner layer and the cooling outer layer, and the gap serves as a circulation cavity for the cooling medium.

5. The biomass high temperature pyrolysis auger group according to claim 4, characterized in that: A liquid inlet is provided at the bottom end of one side of the circulation cavity, and a liquid outlet is provided at the top end of the other side.

6. The biomass high temperature pyrolysis auger assembly according to claim 1, characterized in that: The biomass high-temperature pyrolysis auger group further includes a pyrolysis gas collection pipe group for collecting pyrolysis gas discharged from the biomass high-temperature pyrolysis auger group.

7. The biomass high temperature pyrolysis auger assembly according to claim 6, characterized in that: The pyrolysis gas collecting pipe group includes a main collecting pipe, a pyrolysis collecting pipe and a cooling collecting pipe; The air inlet end of the pyrolysis collection pipe is connected to the air outlet end of the pyrolysis auger pipe, the cooling collection pipe is connected to the air outlet end of the cooling auger pipe, and the air outlet ends of the pyrolysis collection pipe and the cooling collection pipe are both connected to the air inlet end of the main collection pipe.

8. The biomass high temperature pyrolysis auger assembly according to any one of claims 3 to 7, characterized in that: The biomass high-temperature pyrolysis auger group also includes a driving component for driving multiple pyrolysis shafts and cooling shafts to rotate synchronously.

9. The biomass high temperature pyrolysis auger assembly according to claim 8, characterized in that: The driving assembly includes a driving motor, a speed reducer and a synchronous pulley; The output shaft of the driving motor is connected to the input end of the synchronous pulley through a speed reducer, and the output end of the synchronous pulley is respectively connected to a plurality of pyrolysis rotating shafts and a cooling rotating shaft.

10. A skid-mounted biomass high-temperature pyrolysis device, characterized in that: It comprises the biomass high-temperature pyrolysis auger group according to any one of claims 1 to 9.

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