Tunnel type circulating moving pyrolysis furnace

Abstract

The application provides a tunnel type circulating mobile pyrolysis furnace, which comprises a heating annular furnace, a track is arranged in the lower part of the interior of the heating annular furnace, a plurality of sequentially connected pyrolysis cages matched with the track are arranged on the track, a feeding device and a discharging device are respectively arranged in the upper part and the lower part of the heating annular furnace, and the feeding device and the discharging device are respectively communicated with the interior of the heating annular furnace; the application has good air tightness, realizes complete gasification of biomass and continuous production, efficiently removes tar and ash, and can be applied to large-scale industrialization to efficiently pyrolyze biomass into CO and H2 for synthesizing green methanol, realizes a multi-generation energy system taking biomass gasification as the core, can jointly produce methanol, fuel gas, heat energy and electric energy, improves the overall economy of the system, simplifies the production process of a single product, reduces the total investment, and simultaneously reduces pollutant emission.

Description

Technical Field

[0001] This application relates to the field of biomass pyrolysis technology, specifically to a tunnel-type circulating mobile pyrolysis furnace. Background Technology

[0002] The rapid development of modern industry has led to the excessive consumption of resources and fossil fuels. Resource depletion and environmental degradation have become pressing issues for sustainable development. It is estimated that 5 million people die each year from air pollution, famine, and disease caused by climate change and excessive carbon emissions. Countries around the world are increasingly emphasizing sustainable development, promoting green energy transition, developing renewable energy, and reducing pollution emissions. Biomass energy, as a renewable energy source, can effectively reduce greenhouse gas emissions. Theoretically, the utilization of biomass energy can achieve net-zero CO2 emissions, which helps to mitigate global climate change and control greenhouse gas emissions.

[0003] Biomass dry distillation technology, with its advantages of high calorific value and large production capacity, has become an important direction for the utilization of biomass energy. Dry distillation is a thermochemical conversion process, which is usually carried out in an oxygen-free or low-oxygen environment to avoid biomass oxidation. Its basic principle is to convert biomass organic molecular chains into primary energy substances in three states—gas (combustible gas), liquid (cracked oil), and solid (carbon)—under certain pressure, temperature, and time conditions at high temperatures.

[0004] Existing biomass dry distillation processes and equipment mostly use gasifying agents, with the main drawbacks being low calorific value and high tar content in the fuel gas. To improve the calorific value of the fuel gas, intermittent pyrolysis furnaces have emerged. Although the calorific value has increased, the large amount of tar produced not only easily causes secondary pollution but also prevents continuous production and large-scale application, becoming a bottleneck restricting this industry. Furthermore, in the existing processes, the dry distillation gasification, tar cracking, and CO to CH4 synthesis units are completed in three separate units, resulting in complex processes, high energy consumption, and a narrow range of catalysts. In addition, existing biomass gasification equipment on the market suffers from problems such as easy slagging, difficulty in filtration of tar, and easy clogging, which limits its market promotion and application.

[0005] To utilize biomass resources more efficiently and environmentally, various biomass pyrolysis furnaces employing biomass dry distillation technology have emerged, but all of them have certain problems to some extent: 1. High-efficiency pyrolysis type biomass dry distillation pyrolysis furnace: (1) It is easy to accumulate ash and clump together, causing blockage or poor reflux; (2) Chlorine corrosion and alkali metal sulfate corrosion exist in high temperature environment. In low temperature flue, it is easy to cause sulfuric acid mist and hydrochloric acid mist corrosion; (3) Agricultural and forestry biomass has low density, low calorific value, and high fiber content, which is easy to entangle and cause blockage of the feeding system or insufficient feeding, affecting the safe and continuous operation of the boiler; (4) It is easy to cause blockage of the bed slag discharge pipe and the tar on the inner wall of the furnace is easy to scale, affecting the boiler efficiency; (5) The energy recovery and utilization rate and gas utilization rate are poor.

[0006] 2. External heating dry distillation pyrolysis furnace: (1) High investment cost and low thermal efficiency; (2) Uneven heating, resulting in serious secondary decomposition of volatile products; (3) External heating dry distillation equipment belongs to external heating carbonization device, that is, the heat for heating biofuel comes from other fuels, usually a part of the same fuel as the carbonization raw material, so the raw material consumption is large; (4) Low production efficiency, complex process, and cannot be continuously produced; (5) Not only seriously pollutes the environment, but also wastes a lot of resources.

[0007] The applicant, after searching, found a similar prior art document: Application No. CN202322086720.1, a biomass self-heating dry distillation charcoal gasifier, which discloses a technical solution including a hopper, a storage chamber, a main furnace body, and a discharge chamber arranged sequentially from top to bottom; the main furnace body includes a main furnace wall, an upper partition, and a lower partition, with several dry distillation pipes connected at their upper ends to the storage chamber and at their lower ends to the discharge chamber between the upper and lower partitions; each dry distillation pipe has multiple upward-sloping gas outlet pipes on its wall, and each dry distillation pipe has an ignition pipe connected to the outside of the main furnace wall; a furnace door and a ignition outlet are provided on the main furnace wall; the discharge chamber is a funnel-shaped discharge chamber. The hopper discharge chamber is equipped with a circulating cooling water pipe for cooling biomass char, and a discharge port is provided at the bottom of the funnel discharge chamber; a screw conveyor for conveying biomass char is provided below the discharge port; no tar or wastewater is generated in this production process, and combustible gas can be recycled, which is energy-saving and environmentally friendly, and the biomass char produced is of good quality; however, the application has the following problems: (1) the efficiency of biomass pyrolysis carbonization technology is relatively low and the production cycle is long, which limits its large-scale application and economic benefits; (2) the equipment has poor stability, which affects the continuous operation of the equipment and the production efficiency is low; (3) the feed hopper is not equipped with a sealing device, which inevitably leads to air mixing into the feed trough, affecting the biomass dry distillation effect.

[0008] Because biomass gasification can generate huge environmental, social and economic benefits, it is a core technology for achieving efficient and clean energy synthesis. Solving the current problems that restrict its development, such as low gasification efficiency and tar generation clogging pipelines, is an urgent problem to be solved for the continuous operation and production of biomass gasifiers.

[0009] In view of the problems and shortcomings of existing biomass pyrolysis furnaces, this application provides a new technical solution to address these issues. Utility Model Content

[0010] This application provides a tunnel-type circulating mobile pyrolysis furnace, including a heating ring furnace. The lower part of the heating ring furnace is provided with a track, and a plurality of pyrolysis cages connected in sequence to the track are provided on the track. The upper and lower parts of the heating ring furnace are respectively provided with a feeding device and a discharging device, and the feeding device and the discharging device are respectively connected to the interior of the heating ring furnace.

[0011] As a preferred embodiment, the pyrolysis cage includes a cage body for holding materials, the bottom of the cage body is provided with rollers that cooperate with the track, the bottom of the cage body is provided with a discharge port, and the discharge port is provided with a valve that cooperates with it.

[0012] The valve includes a triangular prism, the middle of which is connected to the pyrolysis cage via a rotating shaft. The two ends of the rotating shaft, which extends to the outside of the pyrolysis cage, are equipped with meshing wheels. The meshing wheels engage with meshing teeth set on a track. The inner wall of the pyrolysis cage is provided with a support column that abuts against the triangular prism.

[0013] As a preferred embodiment, the cage body is provided with a partition, and a gap is provided between the bottom of the partition and the bottom of the cage body.

[0014] As a preferred embodiment, the cage is lined with refractory bricks.

[0015] As a preferred embodiment, the heating ring furnace employs at least one heating method selected from plasma heating, microwave heating, and radiation heating.

[0016] As a preferred embodiment, the heating ring furnace is equipped with a heat preservation device.

[0017] As a preferred embodiment, the heating ring furnace is externally covered with aerosol insulation material.

[0018] As a preferred embodiment, the heating ring furnace includes an annular base plate, on which the track is provided, and on the upper part of the annular base plate is an annular cover that cooperates with it. A heating device is provided on the annular base plate and / or the annular cover.

[0019] As a preferred embodiment, the annular cover is provided with an outer insulation groove and an inner insulation groove, and insulation devices are installed in both the outer insulation groove and the inner insulation groove.

[0020] As a preferred embodiment, the annular base plate is parallel to the ground, and multiple power devices are provided in the middle of the track.

[0021] As a preferred embodiment, the annular base plate is inclined, and at least two power units are provided in the middle of the track.

[0022] As a preferred embodiment, the angle between the annular base plate and the ground is 10°–45°.

[0023] As a preferred embodiment, the power unit includes a belt mounted on a track, with a drive wheel and a driven wheel connected to each end of the belt. The drive wheel and the driven wheel are connected to a drive shaft and a driven shaft, respectively. The drive shaft and the driven shaft are rotatably mounted on an annular base plate, and the drive shaft is connected to a rotary motor.

[0024] As a preferred embodiment, the unloading device includes multiple ash collection tanks, and a unloading safety valve is provided between adjacent ash collection tanks and at the bottom of the lowest ash collection tank.

[0025] As a preferred embodiment, the bottom of the heating ring furnace is provided with an exhaust port, which is connected to a gas collecting pipe, which is connected to a gas storage tank, and a Roots blower is provided at the connection between the gas collecting pipe and the gas storage tank.

[0026] As a preferred embodiment, the gas collection pipe is equipped with a buffer airbag.

[0027] This application has the following advantages: 1. During the gasification process, biomass is completely pyrolyzed, resulting in low tar content. This not only solves the problems of pipeline blockage and secondary pollution but also increases the composition of effective gases. 2. This application has good airtightness, which improves the quality of pyrolysis products and avoids the problems of dust and VOC leakage, ensuring that no secondary pollution will be generated, and also greatly improves production efficiency. 3. The track is not on the same horizontal plane. It is designed to utilize heat sources at different temperatures in stages, which maximizes the effect of high-temperature heat sources in different processes. It also enables the driving of the pyrolysis cage in some stages to utilize dynamic potential energy and gravitational potential energy, thereby reducing the external power input requirement and improving the overall airtightness of the device. 4. The heating ring furnace adopts at least one heat transfer method among plasma heating, microwave heating, and radiation heating, which greatly improves the heat transfer efficiency. 5. This application has an internal coil insulation device and can also be covered with aerosol insulation material, which ensures the insulation performance of the heating ring furnace. The production line is not affected by external environmental factors such as weather. Under the premise of safety and environmental protection, it can achieve long-term full-load uninterrupted and stable operation. 6. Adding refractory bricks into the pyrolysis cage creates a high-temperature space, reducing heat loss, resisting high temperatures and chemical erosion, adapting to working conditions, and extending service life. These factors together ensure the safe and stable operation of the pyrolysis furnace. 7. The pyrolysis cage has internal baffles to increase the heat transfer area and greatly improve the heat transfer efficiency. Attached Figure Description

[0028] Figure 1 This is a structural schematic diagram from one angle of this application; Figure 2 This is a structural schematic diagram from angle two of this application; Figure 3 This is a structural schematic diagram of angle one of the annular base plate of this application; Figure 4 This is a structural schematic diagram of angle two of the annular base plate in this application; Figure 5 This is a schematic diagram of the power unit at angle one of this application; Figure 6 This is a schematic diagram of the power unit at angle two of this application; Figure 7 This is a schematic diagram of the ring-shaped cover. Figure 8 This is a schematic diagram of the structure of the pyrolysis cage at angle one; Figure 9 This is a schematic diagram of the structure of the pyrolysis cage at angle two; Figure 10 This is a schematic diagram of a ring-shaped cover with an internal heating coil installed. Figure 11 yes Figure 3 A magnified view of part A in the middle; Figure 12 yes Figure 6 A magnified view of part B in the middle section; 1. Heating ring furnace; 2. Track; 3. Pyrolysis cage; 4. Feeding device; 5. Discharging device; 6. Ash collection hopper; 7. Discharging safety valve; 8. Discharge port; 9. Exhaust port; 10. Gas collection pipe; 11. Gas storage tank; 12. Roots blower; 13. Feeding hopper; 14. Cage body; 15. Hook; 16. Hanging ring; 17. Roller; 18. Triangular prism; 19. Rotating shaft; 20. Meshing wheel; 21. Meshing tooth; 22. Support column; 23. Partition; 24. Gap; 25. Annular bottom plate; 26. Annular cover; 27. Heating device; 28. Outer insulation groove; 29. ​​Inner insulation groove; 30. Insulation device; 31. Belt; 32. Driving wheel; 33. Driven wheel; 34. Driving shaft; 35. Driven shaft; 36. Rotary motor. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 To be continued Figure 12 The specific embodiments of this utility model will be described in detail below. It should be noted that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model. Example 1

[0030] This application provides a tunnel-type circulating mobile pyrolysis furnace, including a heating ring furnace 1. The heating ring furnace 1 is sealed to ensure good airtightness, avoiding dust and VOC leakage and preventing secondary pollution. The heating ring furnace 1 employs at least one heating method selected from plasma heating, microwave heating, and radiation heating. Combining multiple heating methods can significantly improve heat transfer efficiency. The interior of the heating ring furnace 1 is divided into a drying zone, a low-temperature zone, and a high-temperature zone. The specific zone division is not specifically limited and can be adjusted by technicians according to actual working conditions. The temperature of the drying zone is approximately 100℃-250℃. After drying, the material enters the low-temperature zone of the pyrolysis zone along with the pyrolysis cage, where a pyrolysis reaction occurs. The temperature is typically between 200℃ and 500℃. During this stage, most of the volatile components in the biomass are pyrolyzed from the solid, producing... The pyrolysis process generates volatile substances and solid char. The volatile components produced by pyrolysis undergo oxidation and reduction reactions with the coke. The pyrolysis cage continues to move into the high-temperature zone of the pyrolysis zone, where the temperature is approximately 800℃-1200℃. In this zone, the biomass is completely gasified, and the generated CO2 and H2O may undergo reduction reactions with the coke, ultimately producing a gas with CO and H2 as the main combustible components. The aforementioned plasma heating, microwave heating, and radiation heating devices all employ controllable temperature-changing devices, facilitating the adjustment of the drying zone, low-temperature zone, and high-temperature zone temperatures to achieve high-temperature decomposition of the tar. The heating ring furnace 1 is equipped with a vacuum device (not shown in the figure), which creates a sealed negative pressure space within the heating ring furnace 1. Materials can be transported under negative pressure, effectively ensuring airtightness and material safety during transport, and achieving uninterrupted, continuous, and stable operation of the feeding process.

[0031] The bottom of the heating ring furnace 1 is provided with a track 2, which is fixed to the heating ring furnace 1 by welding or other methods to improve the stability of the connection. Multiple pyrolysis cages 3 are sequentially connected to the track 2 and move along it. This application can effectively prevent tar from solidifying and clogging in the equipment, ensuring continuous and stable operation of the process. The upper and lower parts of the heating ring furnace 1 are respectively provided with a feeding device 4 and a discharging device 5, which are respectively connected to the interior of the heating ring furnace 1. The discharging device 5 corresponds to the discharging port 8 located at the bottom of the heating ring furnace 1. Preferably, for convenience... For convenient feeding, the feeding device 4 adopts a bucket feeding system. There can be one or more feeding devices 4, which can be adjusted according to the amount of tar, the properties of the material and the product category. It is easy to operate and safe and reliable. Specifically, the unloading device 5 includes multiple ash collection tanks 6. A discharge safety valve 7 is provided at the bottom of the lowest ash collection tank 6 between adjacent ash collection tanks 6. This structure maintains the airtightness of the equipment and uses pressure changes to control the collection and discharge of ash collection tanks 6, ensuring uninterrupted, continuous and stable operation. Furthermore, the unloading device 5 is connected to a screw conveyor to transport small molecule ash and large molecule biochar. It has a high level of automation and solves the problem of difficult slag discharge.

[0032] The bottom of the heating ring furnace 1 is provided with an exhaust port 9, from which pyrolysis gas, mainly composed of CO and H2, is discharged. Specifically, the exhaust port 9 is connected to a gas collecting pipe 10, which is connected to a gas storage tank 11. A Roots blower 12 is provided at the connection between the gas collecting pipe 10 and the gas storage tank 11. There can be one or more exhaust ports 9, which can be adjusted according to the amount of tar, the properties of the material, and the product category. The operation is convenient, safe, and reliable. Preferably, in order to stabilize the airflow pressure, a buffer air bag (not shown in the figure) is provided on the gas collecting pipe 10. The exhaust port 9 is located in the high-temperature zone, which increases the content of effective gas and ensures complete pyrolysis of the tar.

[0033] Preferably, the heating ring furnace 1 is equipped with a heat preservation device 30, and the exterior of the heating ring furnace 1 is covered with aerosol heat preservation material; the heating ring furnace 1 of this application has good heat preservation performance, thereby making the production line operation unaffected by external environmental factors such as weather, and under the premise of safety and environmental protection, it can achieve long-term full-load uninterrupted and stable operation.

[0034] In this embodiment, the biomass raw materials, after pretreatment, enter the bucket feeding system. The material enters the buckets of the bucket elevator and is transported to a higher position by the conveyor belt or chain. In the bucket elevator, the buckets scoop up the material from the storage below and lift it to the top by the conveyor belt or chain. After passing over the top wheel, the material is tilted downwards and first added to the feeding bin 13. Then, the material is controlled to enter the pyrolysis cage 3 for drying in the drying zone. The wet material is heated, causing the moisture in the material to evaporate and precipitate, thus dehydrating and drying the biomass. The dried material moves with the pyrolysis cage 3 through electrical energy or gravitational potential energy into the low-temperature pyrolysis zone, where a pyrolysis reaction occurs. In the low-temperature zone, the organic components of biomass decompose, producing volatile substances and solids. The volatile components produced by pyrolysis undergo oxidation and reduction reactions with the coke. The pyrolysis cage 3 continues to move to the high-temperature zone, further increasing the temperature to 800℃-1200℃. The biomass is completely gasified, and the produced CO2 and H2O can undergo reduction reactions with the coke, ultimately generating a gas with CO and H2 as the main combustible components. During the pyrolysis process, the types and proportions of pyrolysis products obtained will vary depending on the heating rate, pyrolysis temperature, and residence time of the pyrolysis gas. There are no specific limitations; technicians can select appropriate process parameters as needed.

[0035] This embodiment can be used under both normal and pressurized conditions. Example 2

[0036] This embodiment describes the pyrolysis cage 3, specifically: The pyrolysis cage 3 includes a cage body 14 for placing materials. The cage body 14 is preferably rectangular. Hooks 15 and hanging rings 16 are respectively provided at both ends of the cage body 14 to connect multiple pyrolysis cages 3. The bottom of the cage body 14 is provided with rollers 17 that cooperate with the track 2. The rollers 17 move along the track 2, thereby driving the cage body 14 to move clockwise or counterclockwise along the track 2. The bottom of the pyrolysis cage 3 is provided with a pyrolysis cage outlet. A triangular prism 18 is provided on the outlet to cooperate with it. The middle part of the triangular prism 18 is connected to the pyrolysis cage 3 through a rotating shaft 19. The rotating shaft 19, which extends to the outside of the pyrolysis cage 3, is equipped with meshing wheels 20 at both ends. The meshing wheels 20 mesh with teeth provided on the track 2. To ensure that the triangular prism 18 does not rotate when the meshing wheel 20 and the meshing tooth 21 are not meshing, a support column 22 is provided on the inner wall of the pyrolysis cage 3 to abut against the side wall of the triangular prism 18. Under the action of the support column 22, no action will occur during the addition of materials to the pyrolysis cage 3 or during its operation. When the meshing wheel 20 and the meshing tooth 21 are meshing, the triangular prism 18 rotates, and the material is discharged along the discharge port and unloading port 8 of the pyrolysis cage. In this embodiment, the unloading port 8 has a certain length so that the pyrolysis cage 3 completes the unloading of materials during the movement. After leaving the unloading port 8, the plane of the triangular prism 18 is parallel to the bottom of the pyrolysis cage 3, waiting for the next filling.

[0037] Preferably, to avoid uneven heating and incomplete decomposition of biomass within the pyrolysis cage 3, a partition 23 is provided inside the cage body 14. The partition 23 has a certain gap 24 with the bottom of the pyrolysis cage 3. The partition 23 improves the heat transfer effect, thereby ensuring uniform heating of the biomass. More preferably, refractory bricks are provided inside the cage body 14. The refractory bricks can protect the cage body 14, forming a high-temperature space to reduce heat loss, resist high temperature and chemical corrosion, adapt to working conditions, and extend the service life of the equipment. Example 3

[0038] This embodiment describes the heating ring furnace 1, specifically: The heating ring furnace 1 includes an annular base plate 25, on which the track 2 is provided. An annular cover 26, which mates with the annular base plate 25, is provided on the upper part of the annular base plate 25. A sealing device, such as a sealing ring and sealing layer, is provided between the annular cover 26 and the annular base plate 25 to ensure a sealed connection. A heating device 27 is provided on the annular base plate 25 and / or the annular cover 26. The heating device 27 is at least one of a plasma heater, a microwave heater, and a radiation heater. Preferably, the plasma heater is a plasma heating gun; the microwave heater is preferably a radiation heater, and the radiation heater is preferably an electric heating radiation plate, an infrared heating lamp, etc. More specifically, the plasma heater is installed on the top or side wall of the annular cover 26, allowing the plasma jet to directly... The microwave heater is applied directly above the object or material being heated to better transfer heat and heat the material quickly and efficiently. The microwave heater is preferably installed on the outer sidewall of the annular cover 26, transmitting microwave energy into the annular furnace 1 via waveguides or antennas to create a uniform microwave field, thereby heating the material. The radiant heater is preferably installed on the top or sidewall of the annular cover 26, with radiant heating elements evenly distributed along the inner circumference of the annular cover 26, ensuring that heat is evenly radiated to all locations within the annular furnace 1, guaranteeing uniform heating of the object. When installed on the top, it can radiate downwards to heat the material inside the furnace, suitable for processes requiring high surface heating. Specific installations are not limited; technicians can choose according to the specific circumstances.

[0039] Preferably, the annular cover 26 is provided with an outer heat preservation groove 28 and an inner heat preservation groove 29, and a heat preservation device 30 is installed in both the outer heat preservation groove 28 and the inner heat preservation groove 29. In this embodiment, the heat preservation device 30 is a heating coil. Example 4

[0040] The annular base plate 25 is inclined, and at least two power devices are provided in the middle of the track 2. One of them is located at the lower part of the meshing teeth 21, and the other is located at the upper part of the meshing teeth 21. In this embodiment, only the power device located at the upper part of the meshing teeth 21 is shown in the figure. The angle between the annular base plate 25 and the ground is 10° to 45°. In this case, the track 2 is not on the same horizontal plane. The driving of the pyrolysis cage 3 in some stages utilizes dynamic potential energy and gravitational potential energy, thereby reducing electrical energy and saving production costs.

[0041] The power unit includes a belt 31 mounted on the track 2, with its upper surface flush with the upper surface of the track 2. The belt 31 is made of a high-temperature resistant material, and a drive wheel 32 and a driven wheel 33 are connected to its two ends respectively. The drive wheel 32 and the driven wheel 33 are connected to the drive shaft 34 and the driven shaft 35 respectively. The drive shaft 34 and the driven shaft 35 are rotatably mounted on the annular base plate 25 via bearings and other components. The drive shaft 34 is connected to a rotary motor 36, which is located on the outside of the annular base plate 25 and is directly fixed to a fixed platform that cooperates with it. This is conventional prior art and is not shown in the figures of this application. Similarly, the heating annular furnace 1 of this application is fixed to a support frame or other parts according to the needs of use. This is a conventional method and is not within the scope of protection of this application, so it will not be described in detail here. When the rotary motor 36 is started, it drives the belt 31 to rotate through the drive wheel 32 and the driven wheel 33, thereby driving the pyrolysis cage 3 mounted on the belt 31 to move, providing the power required for the movement of the pyrolysis cage 3. Example 5

[0042] In this embodiment, the annular base plate 25 is parallel to the ground, and multiple power devices are provided on the track 2. In this case, the pyrolysis cage 3 is driven by the power devices. In this scheme, in order to avoid interference between the power devices and the meshing teeth, the valve in this embodiment does not use a meshing method for opening and closing, but can use external force. For example, a pushing device is provided on the outside of the corresponding position of the discharge port 8, and a rotating device is provided on the pushing device. The rotating device extends to the inside of the heating annular furnace 1. When the pyrolysis cage 3 moves to the discharge port 8, the power device controls it to pause its movement, and the pushing device pushes it. The rotating device cooperates with the rotating shaft 19 to drive the rotating shaft 19 to rotate, thereby releasing the material. After the triangular prism 18 is reset, the power device continues to drive the movement. It should be noted that the rotating device that extends into the interior of the pyrolysis cage 3 is only a connecting rod that cooperates with the rotating shaft 19. The power device that drives the rotation is located on the outside of the heat receiving cage 3. If the pushing device adopts a moving module, the slider of the moving module is equipped with a rotary motor. The output end of the rotary motor is connected to a rotating shaft. The top of the rotating shaft is equipped with an internal hex wrench, and the two sides of the rotating shaft 19 are equipped with hexagons that cooperate with the internal hex wrench.

[0043] Biomass feedstock enters the heating ring furnace 1 from the top. The material undergoes uniform dehydration and pyrolysis within the furnace in a monolithic state. As the pyrolysis cage 3 moves, the material heats up and pyrolyzes into pyrolysis gas, mainly composed of CO and H2, and ash containing biomass char, which is discharged from the exhaust port 9 and the unloading device 5 respectively. This application has good airtightness, realizes complete gasification and continuous production of biomass, efficiently removes tar and ash, and can be applied on a large scale to efficiently pyrolyze biomass into CO and H2 for the synthesis of green methanol. It realizes a multi-generation energy system with biomass gasification as the core, which can jointly produce methanol, fuel gas, heat energy and electricity, improve the overall economic efficiency of the system, simplify the production process of a single product, reduce total investment, and reduce pollutant emissions. This application obtains combustible gas, mainly CO and H2, biomass char and ash as the main products for collection and utilization. CO and H2 can be subsequently used to synthesize green methanol.

[0044] This application has the following advantages: 1. During the gasification process, biomass is completely pyrolyzed, resulting in low tar content. This not only solves the problems of pipeline blockage and secondary pollution but also increases the composition of effective gases. 2. This application has good airtightness, which improves the quality of pyrolysis products and avoids the problems of dust and VOC leakage, ensuring that no secondary pollution will be generated, and also greatly improves production efficiency. 3. The track is not on the same horizontal plane. It is designed to utilize heat sources at different temperatures in a tiered manner, maximizing the effect of high-temperature heat sources in different processes. It also enables the driving of the pyrolysis cage in some stages to utilize dynamic potential energy and gravitational potential energy, thereby reducing external power input and improving the airtightness of the device. 4. The heating ring furnace adopts at least one heat transfer method among plasma heating, microwave heating, and radiation heating, which greatly improves the heat transfer efficiency. 5. This application has an internal coil insulation device and can also be covered with aerosol insulation material, which ensures the insulation performance of the heating ring furnace. The production line is not affected by external environmental factors such as weather. Under the premise of safety and environmental protection, it can achieve long-term full-load uninterrupted and stable operation. 6. Adding refractory bricks into the pyrolysis cage creates a high-temperature space, reducing heat loss, resisting high temperatures and chemical erosion, adapting to working conditions, and extending service life. These factors together ensure the safe and stable operation of the pyrolysis furnace. 7. The pyrolysis cage has internal baffles to increase the heat transfer area and greatly improve the heat transfer efficiency.

[0045] The devices and connections not specifically described above are all existing technologies, and will not be described in detail here.

[0046] The preferred embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0047] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without conflict. In order to avoid unnecessary repetition, the various possible combinations in this application will not be described separately.

[0048] Furthermore, various different implementations of this application can be combined in any way, as long as they do not violate the spirit of this application, and such combinations should also be regarded as the content disclosed in this application.

Claims

1. A tunnel-type circulating mobile pyrolysis furnace, characterized in that, The device includes a heating ring furnace (1), with a track (2) in the lower part of the heating ring furnace (1), and a pyrolysis cage (3) that cooperates with the track (2). The upper and lower parts of the heating ring furnace (1) are respectively provided with a feeding device (4) and a discharging device (5), and the feeding device (4) and the discharging device (5) are respectively connected to the interior of the heating ring furnace (1).

2. The tunnel-type circulating mobile pyrolysis furnace according to claim 1, characterized in that, The pyrolysis cage (3) includes a cage body (14) for holding materials. The bottom of the cage body (14) is provided with rollers (17) that cooperate with the track (2). The bottom of the cage body (14) is provided with a discharge port, and a valve that cooperates with the discharge port is provided.

3. The tunnel-type circulating mobile pyrolysis furnace according to claim 2, characterized in that, The valve includes a triangular prism (18), the middle part of which is connected to the cage (14) via a pivot (19). The pivot (19) extending to the outside of the cage (14) has meshing wheels (20) installed at both ends. The meshing wheels (20) cooperate with meshing teeth (21) set on the track (2). The inner wall of the cage (14) is provided with a support column (22) that abuts against the triangular prism (18).

4. A tunnel-type circulating mobile pyrolysis furnace according to claim 2, characterized in that, The cage (14) is provided with a partition (23), and there is a gap (24) between the bottom of the partition (23) and the bottom of the cage (14).

5. A tunnel-type circulating mobile pyrolysis furnace according to claim 1, characterized in that, The heating ring furnace (1) adopts at least one of the following heating methods: plasma heating, microwave heating, and radiation heating.

6. A tunnel-type circulating mobile pyrolysis furnace according to claim 1, characterized in that, The heating ring furnace (1) is equipped with a heat preservation device (30).

7. A tunnel-type circulating mobile pyrolysis furnace according to claim 1, characterized in that, The heating ring furnace (1) is covered with aerosol insulation material.

8. A tunnel-type circulating mobile pyrolysis furnace according to claim 5, characterized in that, The heating ring furnace (1) includes an annular bottom plate (25), the track (2) is provided on the annular bottom plate (25), the upper part of the annular bottom plate (25) is provided with a sealed annular cover (26) that cooperates with it, and a heating device (27) is provided on the annular bottom plate (25) and / or the annular cover (26).

9. A tunnel-type circulating mobile pyrolysis furnace according to claim 8, characterized in that, The annular cover (26) is provided with an outer heat insulation groove (28) and an inner heat insulation groove (29), and heat insulation devices (30) are installed in both the outer heat insulation groove (28) and the inner heat insulation groove (29).

10. A tunnel-type circulating mobile pyrolysis furnace according to claim 8, characterized in that, The annular base plate (25) is parallel to the ground, and multiple power devices are provided in the middle of the track (2), or the annular base plate (25) is inclined, and at least two power devices are provided in the middle of the track (2).

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