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

Abstract

The application discloses a biomass high-temperature pyrolysis auger group and a skid-mounted biomass high-temperature pyrolysis device, and belongs to the technical field of biomass treatment, and aims to solve the problems of low processing 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 parallelly arranged pyrolysis auger pipes; the pyrolysis auger pipe comprises a pyrolysis pipe body, a pyrolysis auger blade arranged in the pyrolysis pipe body and a pyrolysis rotating shaft, the pyrolysis auger blade is sleeved on the outer wall of the pyrolysis rotating shaft, and the plurality of pyrolysis pipe bodies are connected in a head-to-tail mode to form a zigzag biomass conveying pipeline; the spiral directions of the two adjacent pyrolysis auger blades are opposite, and the pyrolysis auger blade is driven to rotate by the pyrolysis rotating shaft. The application can be used for biomass high-temperature pyrolysis.

Description

Technical Field

[0001] This invention belongs to the field of biomass processing technology, and particularly relates to a biomass high-temperature pyrolysis auger assembly and a skid-mounted biomass high-temperature pyrolysis device. Background Technology

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

[0003] High-temperature pyrolysis typically employs skid-mounted biomass high-temperature pyrolysis units, which offer advantages such as short on-site installation time, ease of relocation and rearrangement, high flexibility, and the ability to achieve continuous material input and continuous product output.

[0004] However, most existing skid-mounted biomass high-temperature pyrolysis units adopt a rotary kiln structure. On the one hand, because rotary kilns rely on the rotation of the cylinder to achieve material tumbling 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 materials with high moisture content, the energy consumption cost soars. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide a biomass high-temperature pyrolysis auger assembly and a skid-mounted biomass high-temperature pyrolysis device to solve the problems of low processing capacity and high energy consumption in existing skid-mounted biomass high-temperature pyrolysis devices.

[0006] The objective of this invention is mainly achieved through the following technical solutions.

[0007] This invention provides a biomass high-temperature pyrolysis auger assembly, comprising multiple pyrolysis auger tubes arranged in parallel;

[0008] The pyrolysis auger pipe includes a pyrolysis pipe body, pyrolysis auger blades and a pyrolysis shaft disposed within the pyrolysis pipe body, the pyrolysis auger blades being sleeved on the outer wall of the pyrolysis shaft, and multiple pyrolysis pipe bodies connected end to end forming a zigzag biomass transport 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, multiple pyrolysis auger tubes are arranged in parallel.

[0011] Furthermore, the biomass high-temperature pyrolysis auger assembly also includes a cooling auger tube, which is arranged in parallel with the pyrolysis auger tube;

[0012] The cooling auger tube includes a cooling tube body, cooling auger blades and a cooling shaft disposed within 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 that of the last pyrolysis auger blades.

[0013] Furthermore, the cooling tube body includes an inner cooling layer and an outer cooling layer sleeved outside the inner cooling layer, with a gap between the inner cooling layer and the outer cooling layer, which serves as a flow cavity for the cooling medium.

[0014] Furthermore, an inlet is provided at the bottom of one side of the flow chamber, and an outlet is provided at the top of the other side.

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

[0016] Furthermore, the pyrolysis gas collection pipe assembly includes a main collection pipe, a pyrolysis collection pipe, and a cooling collection pipe;

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

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

[0019] Furthermore, the drive components include a drive motor, a reducer, and a synchronous belt pulley;

[0020] The output shaft of the drive motor is connected to the input end of the synchronous pulley via a reducer, and the output end of the synchronous pulley is connected to multiple pyrolysis shafts and cooling shafts respectively.

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

[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 assembly provided by this invention employs multiple pyrolysis auger tubes arranged in parallel, with the spiral directions of adjacent pyrolysis auger blades opposite. This enables multi-pass motion of the biomass, allowing it to 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 the biomass, improving heat transfer efficiency, reducing energy consumption costs, and enhancing the high-temperature pyrolysis efficiency and quality of the biomass. Furthermore, because multiple pyrolysis auger tubes are arranged in parallel, the overall length and installation space of the high-temperature pyrolysis auger assembly can be reduced while extending the high-temperature pyrolysis path.

[0024] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained through the embodiments described and the accompanying drawings, which are particularly pointed out. Attached Figure Description

[0025] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0026] Figure 1 This is a schematic diagram of the structure of the biomass high-temperature pyrolysis screw conveyor provided in Embodiment 1 of the present invention;

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

[0028] Figure 3 This is a schematic diagram showing the positional relationship between the biomass high-temperature pyrolysis auger assembly and the high-temperature pyrolysis furnace in the skid-mounted biomass high-temperature pyrolysis device provided in Embodiment 2 of the present invention.

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

[0030] Figure label:

[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-Drive wheel; 20-Transmission belt; 21-Driven wheel; 22-Main drive 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-Skimmed platform; 35-High-temperature pyrolysis furnace; 36-Heat storage buffer tank; 37-Pyrolysis gas burner; 371-Combustible gas inlet pipe; 372-Inner cylinder; 373-Outer cylinder; 374-Flue gas outlet pipe; 375-Igniter; 376-Central diffuser cone; 377-Cyclone blade; 378-Main air outlet; 379-Cyclone air hole; 38-Cyclone separator; 39-Tail gas dust collector; 40-Scattering pipe. Detailed Implementation

[0032] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which 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 intended to limit the scope of the present invention.

[0033] Example 1

[0034] This embodiment provides a biomass high-temperature pyrolysis screw conveyor assembly; see [link / reference]. Figure 1 It includes multiple parallel pyrolysis auger tubes, each comprising a pyrolysis tube body, pyrolysis auger blades, and a pyrolysis shaft housed within the pyrolysis tube body. The pyrolysis auger blades are fitted onto the outer wall of the pyrolysis shaft. In two adjacent pyrolysis auger tubes, the outlet of the upper pyrolysis tube body is connected to the inlet of the lower pyrolysis tube body. In other words, multiple pyrolysis tube bodies connected end to end 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 achieve biomass conveying.

[0035] For example, there are four pyrolysis auger tubes, namely a first pyrolysis auger tube, a second pyrolysis auger tube, a third pyrolysis auger tube, and a 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 shaft 3. The second pyrolysis auger tube includes a second pyrolysis tube body 4, a second pyrolysis auger blade 5, and a second pyrolysis shaft 6. The third pyrolysis auger tube includes a third pyrolysis tube body 7, a third pyrolysis auger blade 8, and a third pyrolysis shaft 9. The fourth pyrolysis auger tube includes a fourth pyrolysis tube body 10, a fourth pyrolysis auger blade 11, and a fourth pyrolysis shaft 12.

[0036] During implementation, biomass is fed into the high-temperature pyrolysis auger assembly from the feed end of the first pyrolysis tube 1, and moves to the discharge end of the first pyrolysis tube 1 under the drive of the first pyrolysis auger blades 2; the discharge end of the first pyrolysis tube 1 is connected to the feed end of the second pyrolysis tube 4, and biomass is fed into the feed end of the second pyrolysis tube 4 from the discharge end of the first pyrolysis tube 1, and moves to the discharge end of the second pyrolysis tube 4 under the drive of the second pyrolysis auger blades 5; the discharge end of the second pyrolysis tube 4 is connected to the feed end of the third pyrolysis tube 7, and biomass is fed into the third pyrolysis tube 7 from the discharge end of the second pyrolysis tube 7. The biomass is fed into the feed end of the third pyrolysis tube 7 and moves to the discharge end of the third pyrolysis tube 7 under the drive of the third pyrolysis auger blade 8. The discharge end of the third pyrolysis tube 7 is connected to the feed end of the fourth pyrolysis tube 10. Biomass is fed into the feed end of the fourth pyrolysis tube 10 from the discharge end of the third pyrolysis tube 7 and moves to the discharge end of the fourth pyrolysis tube 10 under the drive of the fourth pyrolysis auger blade 11. During the conveying 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 existing technologies, the biomass high-temperature pyrolysis auger assembly provided in this embodiment adopts multiple pyrolysis auger tubes arranged in parallel, with the spiral directions of adjacent pyrolysis auger blades opposite. This enables multi-pass motion of biomass, allowing biomass to 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 quality of biomass. In addition, since multiple pyrolysis auger tubes are arranged in parallel, the overall length and installation space of the high-temperature pyrolysis auger assembly can be reduced while extending the high-temperature pyrolysis path.

[0038] In order to cool down the biomass after high-temperature pyrolysis, the above-mentioned high-temperature pyrolysis auger assembly also includes a cooling auger tube. The cooling auger tube is arranged in parallel with the pyrolysis auger tube. The cooling auger tube includes a cooling tube body 13, cooling auger blades 14 and a cooling shaft 15 disposed 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 blades. The biomass after high-temperature pyrolysis is cooled through the cooling auger tube.

[0039] In order to enable the supply of cooling medium, the cooling pipe body 13 is a sandwich structure, including an inner cooling layer and an outer cooling layer sleeved outside the inner cooling layer. There is a gap between the inner cooling layer and the outer cooling layer, which serves as a flow cavity for the cooling medium. An inlet is opened at the bottom of one side of the flow cavity, and an outlet is opened at the top of the other side.

[0040] Understandably, biomass produces pyrolysis gases (e.g., carbon monoxide and hydrogen) during pyrolysis. To facilitate the emission of these gases, the aforementioned high-temperature biomass pyrolysis auger assembly also includes a pyrolysis gas collection pipe assembly. Specifically, this assembly comprises a main collection pipe, a pyrolysis collection pipe, and a cooling collection pipe. The inlet of the pyrolysis collection pipe is connected to the outlet of the pyrolysis auger pipe, and the cooling collection pipe is connected to the outlet of the cooling auger pipe. Both the outlets of the pyrolysis and cooling collection pipes are connected to the inlet of the main collection pipe. This pyrolysis gas collection pipe assembly enables the emission of pyrolysis gases generated within multiple pyrolysis and cooling auger pipes.

[0041] In order to simplify the structure of the high-temperature pyrolysis auger assembly and at the same time realize the rotation of multiple pyrolysis shafts and cooling shafts 15, the above-mentioned biomass high-temperature pyrolysis auger assembly also includes a drive assembly 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 via the reducer 18. The output end of the synchronous pulley is connected to multiple pyrolysis shafts and cooling shafts 15, respectively. In this way, the drive motor 17 drives the multiple pyrolysis shafts and cooling shafts 15 to rotate synchronously via the reducer 18 and the synchronous pulley, thereby realizing the transportation of biomass in the high-temperature pyrolysis auger unit.

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

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

[0045] The main drive gear 22 is coaxially and fixedly connected to the output shaft of the reducer 18. One end of the second pyrolysis synchronizing chain 24 and one end of the third pyrolysis synchronizing chain 25 are both sleeved on the outer wall of the main drive gear 22. The other end of the second pyrolysis synchronizing chain 24 is sleeved on the outer wall of the second pyrolysis transfer gear 28. The other end of the third pyrolysis synchronizing chain 25 is sleeved on the outer wall of the third transfer gear. One end of the first pyrolysis synchronizing chain 23 is sleeved on the outer wall of the second transfer gear. The other end of the first pyrolysis synchronizing chain 23 is sleeved on the outer wall of the first transfer gear. One end of the fourth pyrolysis synchronizing 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 synchronizing chain 26 is sleeved on the outer wall of the fourth pyrolysis split gear 30, one end of the cooling synchronizing chain 32 is sleeved on the outer wall of the linkage gear 31, and the other end of the cooling synchronizing chain 32 is sleeved on the outer wall of the cooling split gear 33. With this structure, 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 can be synchronously rotated by a drive motor 17. This can effectively improve the structural compactness and transmission efficiency of the drive assembly, reduce the number of power units, and reduce costs and maintenance difficulty.

[0046] Example 2

[0047] This embodiment provides a skid-mounted high-temperature biomass pyrolysis device. See [link to relevant documentation]. Figure 2 This includes the biomass high-temperature pyrolysis screw conveyor assembly 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 basically the same as those of the biomass high-temperature pyrolysis auger group provided in Embodiment 1, and will not be described in detail here.

[0050] Understandably, 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 a tail gas dust collector 39, all located on the skid-mounted platform 34. The high-temperature pyrolysis auger assembly is located 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 tube are connected in sequence to the pyrolysis gas burner 37 and the heat storage buffer tank 36. The pyrolysis gas generated by the high-temperature pyrolysis furnace 35 and the cooling auger tube is burned by the pyrolysis gas burner 37 to produce high-temperature flue gas, which is returned to the high-temperature pyrolysis furnace 35 through the heat storage buffer tank 36 to provide heat for the high-temperature pyrolysis of biomass. The exhaust gas outlet of the high-temperature pyrolysis furnace 35 is connected in sequence to the cyclone separator 38 and the tail gas dust collector 39. After dust removal, the exhaust gas is discharged into the atmosphere through the chimney.

[0052] In this way, on the one hand, the pyrolysis gas generated by the high-temperature pyrolysis of biomass is used to provide heat for the pyrolysis of biomass in the high-temperature pyrolysis furnace 35. Only a small amount of natural gas needs to be provided for combustion 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 be self-sufficient in heat by using the pyrolysis gas generated by itself, reducing external energy consumption, lowering operating costs, and saving energy and protecting the environment. On the other hand, the skid-mounted integrated design is adopted, with all components integrated on the skid-mounted platform 34. The layout is reasonable and can be directly loaded onto trucks, railway freight cars or cargo ships, avoiding the cumbersome process of disassembling and transporting traditional large equipment. It is convenient for overall installation and movement, greatly reducing the footprint, adapting to different site requirements, and facilitating transportation and installation.

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

[0054] Among them, see Figure 3The upper end of the high-temperature pyrolysis auger assembly is fixedly connected to one side of the high-temperature pyrolysis furnace 35, and the lower end is fixedly connected to the other side of the high-temperature pyrolysis furnace 35. The high-temperature pyrolysis auger assembly is inclined and 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 pipe 40 is provided in the lower furnace chamber, and the air inlet end of the scattering pipe 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 into the lower furnace chamber through the scattering pipe 40. The high-temperature flue gas heats the biomass in the high-temperature pyrolysis auger assembly, causing the biomass to undergo high-temperature pyrolysis. 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 tail gas collection pipe, and then enters the subsequent cyclone separator 38 and tail gas dust collector 39 for dust removal and purification.

[0055] Specifically, the structure of the high-temperature pyrolysis furnace 35 includes a furnace body and an insulation layer and a refractory layer arranged sequentially on the inner wall of the furnace body. A biomass feed inlet is opened at the top of the furnace body, and the biomass feed inlet is connected to the feed end of the high-temperature pyrolysis auger assembly, thereby ensuring the overall structural strength, 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 narrowed-diameter wall, a second narrowed-diameter wall, a third narrowed-diameter wall, and a constant-diameter wall connected sequentially on the planar bottom wall. The planar bottom wall, the first narrowed-diameter wall, the second narrowed-diameter wall, the third narrowed-diameter wall, and the constant-diameter wall constitute a tubular structure composed of multiple eccentrically oriented eccentrically oriented tubes. Scattering holes are formed on the first narrowed-diameter wall, the second narrowed-diameter wall, the third narrowed-diameter wall, and the constant-diameter wall. The end of the first narrowed-diameter wall furthest from the second narrowed-diameter wall serves as the air inlet of the scattering tube 40. This structure of the scattering tube 40 enables uniform gas supply, thereby improving the uniformity of biomass pyrolysis.

[0057] Understandably, during the operation of the device, a small amount of natural gas needs to be supplied into the furnace and ignited. Therefore, the aforementioned 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 into the furnace body to realize the preheating and pre-high-temperature pyrolysis of biomass.

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

[0059] It should be noted that the central diffuser cone 376 is positioned so that its larger end faces the flame direction, which can also block the flame and prevent it from flowing back to the other layer of the central diffuser cone 376, thus ensuring the combustion safety of the preheating burner 16 and the pyrolysis gas burner 37.

[0060] It should be noted that 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] For example, 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 expanding section, a contracting section and a constant diameter section connected in sequence along the combustible gas flow direction, the central diffuser cone 376 and the cyclone blade 377 are both located in the expanding section, the cyclone air hole 379 is located on the side wall of the expanding section and is located on the side of the cyclone blade 377 away from the combustible gas inlet pipe 371, and the igniter 375 is located on the side of the cyclone blade 377 away from the combustible gas inlet pipe 371.

[0062] Thus, on the one hand, due to the expansion section and the constant diameter of the outer cylinder 373, when air is supplied from the main air inlet 378 into the gap between the inner cylinder 372 and the outer cylinder 373, the air velocity continuously increases as the cross-section of the gap gradually decreases, forming a high-speed swirling flow of air through the cyclone holes 379 and supplying it into the outer cylinder 373. On the other hand, the central diffuser cone 376 also reduces the flow cross-section of the combustible gas, increases the flow velocity of the combustible gas, and reduces the increased flow resistance caused by the cyclone blades 377, allowing the combustible gas to flow smoothly through the cyclone blades 377. In summary, by adopting a specific structure for the outer cylinder 373 and the inner cylinder 372, and by positioning each component specifically, the nested structure of the outer cylinder 373 and the inner cylinder 372 can increase the air velocity and the combustible gas velocity, thereby forming two high-speed swirling flows and achieving thorough mixing of air and combustible gas.

[0063] It is worth noting that the generation of two high-speed swirling streams may cause a decrease in gas pressure near the axis of the inner cylinder 372, resulting in a lower concentration of combustible gas and air at this location, which affects the uniformity of combustion within the inner cylinder 372. Therefore, the aforementioned preheating burner 16 and pyrolysis gas burner 37 also include a double-helix central gas supply pipe assembly. Specifically, the central gas supply pipe assembly is located inside the inner cylinder 372 and is coaxially arranged with the inner cylinder 372. The central gas supply pipe assembly includes a spiral combustible gas supply pipe and a spiral air supply pipe, which are intertwined to form a double-helix structure. Multiple combustible gas nozzles are opened on the combustible gas supply pipe, and the outlet direction of the combustible gas nozzles is perpendicular to the side wall of the combustible gas supply pipe. Multiple air nozzles are opened on the air supply pipe, and the outlet direction of the air nozzles is perpendicular to the side wall of the air supply pipe. The combustible gas ejected from the combustible gas nozzles has the same swirling direction as the combustible gas flowing out of the cyclone blades 377, and the air ejected from the air nozzles has the same swirling direction as the air supplied from the cyclone air holes 379. In this way, the double-helix central gas supply pipe assembly can effectively compensate for the problem of low concentration of combustible gas and air in the central area, improve the uniformity of combustion, and at the same time, the combustible gas ejected from the combustible gas nozzle and the air ejected from the air nozzle are still two swirling streams, further improving the overall swirling of the airflow in the inner cylinder 372.

[0064] The above description is only a preferred 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 conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A skid-mounted high-temperature biomass pyrolysis device, characterized in that, It includes a biomass high-temperature pyrolysis auger assembly, a high-temperature pyrolysis furnace, and a pyrolysis gas burner; the pyrolysis gas outlet of the high-temperature pyrolysis furnace is connected to the pyrolysis gas burner, and the biomass high-temperature pyrolysis auger assembly includes multiple pyrolysis auger tubes arranged in parallel; the pyrolysis auger tube includes a pyrolysis tube body and pyrolysis auger blades and a pyrolysis shaft disposed within the pyrolysis tube body, the pyrolysis auger blades being sleeved on the outer wall of the pyrolysis shaft, and multiple pyrolysis tube bodies 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. The high-temperature pyrolysis furnace includes a furnace body and a preheating burner, and the gas outlet of the preheating burner is connected to the furnace body. Both the preheating burner and the pyrolysis gas burner include a combustible gas inlet pipe, an inner cylinder, an outer cylinder, a flue gas outlet pipe, an igniter, and a double-spiral central gas supply pipe assembly. The combustible gas inlet pipe, the inner cylinder, and the flue gas outlet pipe are connected in sequence. The inner cylinder is located inside the outer cylinder and is coaxially and fixedly connected to the outer cylinder. A central diffuser cone and cyclone blades are arranged coaxially with the inner cylinder inside the inner cylinder. There is a gap between the outer wall of the central diffuser cone and the inner wall of the inner cylinder. The cyclone blades are sleeved on the outer wall of the central diffuser cone. The inner end of the cyclone blades is fixedly connected to the central diffuser cone, and the outer end of the cyclone blades is fixedly connected to the inner wall of the inner cylinder. The cyclone blades are located in the gap between the outer wall of the central diffuser cone and the inner wall of the inner cylinder. Multiple cyclone air holes are opened on the side wall of the inner cylinder, and a main air inlet is opened on the side wall of the outer cylinder. There is a gap between the inner and outer cylinders. The main air inlet, the gap between the inner and outer cylinders, and the cyclone air holes form a cyclone channel. The ignition end of the igniter extends into the inner cylinder. The central gas supply pipe group is located inside the inner cylinder and is coaxially arranged with the inner cylinder. The central gas supply pipe group includes a spiral combustible gas supply pipe and a spiral air supply pipe. The two are intertwined to form a double spiral structure. Multiple combustible gas nozzles are opened on the combustible gas supply pipe. The gas outlet direction of the combustible gas nozzles is perpendicular to the side wall of the combustible gas supply pipe. Multiple air nozzles are opened on the air supply pipe. The gas outlet direction of the air nozzles is perpendicular to the side wall of the air supply pipe. The combustible gas ejected from the combustible gas nozzles has the same swirl direction as the combustible gas flowing out of the cyclone blades. The air ejected from the air nozzles has the same swirl direction as the gas supplied from the cyclone air holes. The large end of the central diffuser cone faces the flame direction; the outer cylinder is a constant diameter cylinder structure, and the inner cylinder includes an expanding section, a contracting section and a constant diameter section connected in sequence along the combustible gas flow direction. The central diffuser cone and cyclone blades are both located in the expanding section, and the cyclone air holes are located on the side wall of the expanding section and on the side of the cyclone blades away from the combustible gas inlet pipe. The igniter is located on the side of the cyclone blades away from the combustible gas inlet pipe.

2. The skid-mounted biomass high-temperature pyrolysis device according to claim 1, characterized in that, Multiple pyrolysis augers are arranged in parallel.

3. The skid-mounted biomass high-temperature pyrolysis device according to claim 1, characterized in that, The biomass high-temperature pyrolysis auger assembly also includes a cooling auger pipe, which is arranged in parallel with the pyrolysis auger pipe. The cooling auger tube includes a cooling tube body, cooling auger blades and a cooling shaft disposed within 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 that of the last pyrolysis auger blades.

4. The skid-mounted biomass high-temperature pyrolysis device according to claim 3, characterized in that, The cooling pipe body includes an inner cooling layer and an outer cooling layer sleeved outside the inner cooling layer. There is a gap between the inner cooling layer and the outer cooling layer, and the gap serves as a flow cavity for the cooling medium.

5. The skid-mounted biomass high-temperature pyrolysis device according to claim 4, characterized in that, The flow chamber has an inlet at the bottom of one side and an outlet at the top of the other side.

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

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

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

9. The skid-mounted biomass high-temperature pyrolysis device according to claim 8, characterized in that, The drive assembly includes a drive motor, a reducer, and a synchronous belt pulley; The output shaft of the drive motor is connected to the input end of the synchronous pulley via a reducer, and the output end of the synchronous pulley is connected to multiple pyrolysis shafts and cooling shafts respectively.

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