A continuous cracking furnace and process using lava heating

Abstract

The application discloses a continuous cracking furnace and process using lava heating and relates to the technical field of organic waste resource utilization.The application comprises a shell, a cracking furnace is arranged in the shell, a heating unit is arranged outside the cracking furnace, a lava storage tank is arranged at the top of the shell, a lava driving pump is arranged on the side of the lava storage tank, and a decoking unit is arranged in the cracking furnace.The application has the advantages that the heating unit adopts lava surrounding heating, heat is evenly covered on the furnace body through a circulating pipeline, heat efficiency and safety are improved by matching heat preservation and reflection layers, the drawbacks of open fire heating are solved, the decoking unit is automatically decoked through a scraper and an elastic structure, manual shutdown or chemical decoking is not needed, safety risks and equipment corrosion are avoided, secondary pollution is eliminated, environmental protection requirements are met, the equipment operation cycle is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of organic waste resource utilization technology, and in particular to a continuous pyrolysis furnace and process using lava heating. Background Technology

[0002] In the field of waste material pyrolysis and recycling, the pyrolysis furnace is the core equipment for material conversion and resource recovery. The rationality of its heating method and the stability of its decoking effect directly determine the reliability of equipment operation, production efficiency, and safety of operation. At present, the existing pyrolysis furnaces in the industry generally adopt the method of direct open flame heating of the furnace body. Due to its simple structure and low initial investment cost, this heating method has become the most widely used technical solution and is widely used in the pyrolysis treatment of waste plastics, rubber and other materials.

[0003] However, the direct open flame heating method has defects that seriously restrict the development of the industry. During the open flame heating process, the heat of the flame is concentrated and difficult to spread evenly, which can easily lead to uneven phenomena such as excessively high local temperature and insufficient local temperature in the furnace body. This not only causes incomplete pyrolysis of materials and carbonization of some materials, significantly reducing the yield and quality of pyrolysis products, but also poses serious safety hazards and makes it difficult to guarantee safety.

[0004] In addition, during pyrolysis, pyrolysis products tend to adhere to the inner wall of the furnace, forming coke residue. Existing coke removal methods are mainly manual or chemical. Manual coke removal is labor-intensive, has extremely low efficiency, and requires shutdown, which seriously affects production continuity and increases downtime losses and labor maintenance costs. Chemical coke removal, on the other hand, easily corrodes the inner wall of the furnace, shortens the service life of the equipment, and the chemical agents can react with the pyrolysis products, producing secondary pollution, which does not meet environmental protection requirements. Therefore, there is an urgent need to provide a continuous pyrolysis furnace using lava heating to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a continuous pyrolysis furnace and process using lava heating, which solves the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A continuous pyrolysis furnace using lava heating includes a shell, inside which a pyrolysis furnace is located. One end of the pyrolysis furnace has a feed inlet, and the other end has a discharge outlet. A lava storage tank is located on the top of the shell. A heating device is located inside the lava storage tank. A lava drive pump is located on the side of the lava storage tank. The lava storage tank and the lava drive pump are connected by a high-temperature resistant steel pipe.

[0007] A heating unit is provided between the shell and the pyrolysis furnace to heat and maintain the pyrolysis furnace in a high-temperature environment. A decoking unit is provided inside the pyrolysis furnace, and rotating units are provided on both sides of the pyrolysis furnace to drive the pyrolysis furnace to rotate, so that the pyrolysis is more complete.

[0008] The heating unit also includes a circulation pipeline, one end of which passes through the shell and is connected to the lava drive pump, and the other end is connected to the inside of the lava storage tank. The circulation pipeline surrounds the outside of the pyrolysis furnace.

[0009] Furthermore, the housing is provided with an insulation layer, and the inner wall of the housing is provided with a reflective layer.

[0010] Furthermore, the decoking unit includes a fixed bracket, which is located inside the pyrolysis furnace. A bearing is provided in the middle of the fixed bracket, and a rotating shaft is fixedly installed on the inner ring of the bearing.

[0011] Furthermore, fixed rods are fixedly installed at both ends of the rotating shaft, and a connecting rod with a limit block at the top is movably installed inside the fixed rod. A spring is provided between the fixed rod and the limit block at the top of the connecting rod.

[0012] Furthermore, a guide rod is fixedly installed at the lower end of the connecting rod, a scraper is movably installed on the guide rod, counterweights are fixedly installed at both ends of the guide rod, a spring is fixedly installed at one end of the guide rod, and the other end of the spring is fixedly connected to the end of the scraper.

[0013] Furthermore, the pyrolysis furnace is equipped with a spiral conveyor belt, with a first protrusion between the spiral conveyor belts, and a second protrusion at the discharge end of the pyrolysis furnace. The highest point of the first protrusion is lower than the height of the spiral conveyor belt, and the highest point of the second protrusion is higher than the height of the spiral conveyor belt.

[0014] Furthermore, the rotating unit includes a base, which is disposed inside the housing. A motor is fixedly mounted on the base, and a drive gear is fixedly mounted on the end of the output shaft of the motor. A driven gear is provided on the drive gear, which is disposed on the outer ring of the feed inlet. An auxiliary gear is provided on the opposite side of the driven gear, and the auxiliary gear is rotatably mounted on an auxiliary gear bracket. A guide rail is provided outside the discharge outlet, and auxiliary wheels are provided on both sides of the guide rail.

[0015] A continuous pyrolysis process using lava heating, employing a continuous pyrolysis furnace using lava heating, includes the following steps: S1: Add high-temperature lava medium into the lava storage tank, start the built-in heating device of the storage tank to heat the lava to 480~520℃ and maintain the constant temperature, start the lava drive pump, so that the lava forms a closed circulation in the circulation pipeline surrounding the pyrolysis furnace through the high-temperature resistant steel pipe, relying on the heat-locking of the shell insulation layer and the heat-concentrating of the reflective layer to preheat the pyrolysis furnace to a constant high temperature of 480~520℃; S2: After being crushed and pre-treated to remove impurities, organic waste is continuously and quantitatively fed into the pyrolysis furnace from the feed inlet by an oxygen-free sealed feeder, so that the pyrolysis furnace is always in an oxygen-free or oxygen-deficient state. S3: Start the motor of the pyrolysis furnace rotating unit. Through the meshing transmission of the drive gear and the driven gear, drive the pyrolysis furnace to rotate at a constant speed of 2-5 revolutions per minute. The auxiliary gear, auxiliary wheel and guide rail work together to limit the furnace body offset. Under the dual action of the furnace body rotation and the spiral conveyor belt, the organic waste moves slowly in a spiral manner along the furnace cavity towards the discharge port. S4: Organic waste undergoes continuous pyrolysis in a high-temperature constant-temperature environment heated by molten lava. The protrusions between the spiral conveyors rotate with the furnace body to assist in the turning of the material and improve the fullness of the pyrolysis. At the same time, the scraper of the decoking unit always adheres to the inner wall of the furnace body under the elastic force of springs one and two. When passing through protrusions one and two, it completes the "lifting-energy storage-falling-scraping" cycle action, realizing the simultaneous operation of pyrolysis and automatic decoking. The coke residue generated by decoking moves towards the discharge port along with the material. S5: The pyrolysis gas generated by pyrolysis is collected in real time through a dedicated gas path at the top of the pyrolysis furnace and transported to a condensation and separation device for processing. The condensable components are condensed into pyrolysis oil for collection and storage, while the non-condensable combustible gas is transported to the lava storage tank heating device for reuse as fuel. S6: The solid residue from the pyrolysis and the coke residue from the decoking process are continuously discharged from the outlet under the combined action of the screw conveyor belt and the rotation of the furnace body. After subsequent screening and processing, the residue is utilized as a resource. S7: The temperature of the lava in the lava tank and the temperature inside the pyrolysis furnace are continuously monitored throughout the pyrolysis process. The power of the heating device in the lava tank and the rotation speed of the furnace are finely adjusted in real time based on the monitoring data to ensure the stability of the pyrolysis process parameters. The lava continuously circulates and exchanges heat in the circulation pipeline to achieve efficient heat utilization. The pyrolysis furnace maintains a continuous feeding, continuous pyrolysis and continuous discharge operation throughout the process. Compared with existing technologies, the advantages of this invention are: 1. The heating unit adopts a lava-surround heating design. The lava is transported to the circulation pipeline surrounding the pyrolysis furnace by the drive pump and achieves circulation flow. This allows the heat to be evenly covered throughout the furnace body, solving the problem of local high temperature and local low temperature in open flame heating. This ensures that the material is fully pyrolyzed, avoids carbonization loss, and improves the yield and quality of pyrolysis products. At the same time, lava heating eliminates the risk of open flame. Combined with the heat preservation and heat-gathering design of the inner insulation layer and reflective layer of the shell, it not only reduces heat loss and improves thermal efficiency, but also greatly improves the safety and stability of equipment operation.

[0016] 2. The decoking unit achieves automatic decoking through a scraper and elastic structure. When the pyrolysis furnace rotates, the scraper adheres to the inner wall of the furnace under the elastic force of springs one and two, continuously scraping away coke residue. There is no need for manual shutdown for decoking, avoiding the safety risks of manual operation, extending the continuous operation cycle of the equipment, and reducing manual maintenance costs. At the same time, it abandons chemical decoking methods, avoiding problems such as furnace corrosion and shortened equipment lifespan, and also preventing secondary pollution caused by the reaction of chemical agents with pyrolysis products, which fully meets the industry requirements for environmentally friendly production.

[0017] In summary, the heating unit of this invention adopts lava-surround heating, and the heat is evenly distributed to the furnace body through the circulation pipeline. Combined with the heat preservation and reflective layer, it improves thermal efficiency and safety, and solves the drawbacks of open flame heating. The decoking unit automatically removes coke through scrapers and elastic structure, without the need for manual shutdown or chemical decoking, avoiding safety risks and equipment corrosion, eliminating secondary pollution, meeting environmental protection requirements, and extending the equipment operating cycle and reducing maintenance costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a continuous pyrolysis furnace using lava heating proposed in this invention; Figure 2 This is a half-sectional schematic diagram of the present invention; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the pyrolysis furnace of the present invention; Figure 5 This is a schematic diagram of the installation of the desiccant removal unit of the present invention; Figure 6 This is a partially enlarged schematic diagram A of the present invention; Figure 7 This is a schematic diagram of the interior of the pyrolysis furnace of the present invention.

[0019] In the diagram: 1. Shell, 2. Inlet, 3. Outlet, 4. Lava storage tank, 5. Lava drive pump, 6. Base, 7. Motor, 8. Drive gear, 9. Driven gear, 10. Auxiliary wheel, 11. Guide rail, 12. Circulation pipeline, 13. Insulation layer, 14. Reflective layer, 15. Pyrolysis furnace, 16. Auxiliary gear, 17. Fixed bracket, 18. Bearing, 19. Rotary shaft, 20. Spiral conveyor belt, 21. Protrusion 1, 22. Fixed rod, 23. Guide rod, 24. Scraper, 25. Spring 1, 26. Counterweight, 27. Connecting rod, 28. Spring 2, 29. Protrusion 2. Detailed Implementation

[0020] Reference Figures 1-7 A continuous pyrolysis furnace using lava heating includes a shell 1. The shell 1 is characterized in that a pyrolysis furnace 15 is provided inside the shell 1. One end of the pyrolysis furnace 15 is provided with a feed port 2 and the other end is provided with a discharge port 3. A lava storage tank 4 is provided on the top of the shell 1. A heating device is provided inside the lava storage tank 4. A lava drive pump 5 is provided on the side of the lava storage tank 4. The lava storage tank 4 and the lava drive pump 5 are connected by a high-temperature resistant steel pipe.

[0021] A heating unit is provided between the shell 1 and the pyrolysis furnace 15 to heat and maintain the pyrolysis furnace in a high-temperature environment. A decoking unit is provided inside the pyrolysis furnace 15. Rotating units are provided on both sides of the pyrolysis furnace 15 to drive the pyrolysis furnace 15 to rotate, so that the pyrolysis is more complete.

[0022] The heating unit also includes a circulation pipe 12, one end of which passes through the shell 1 and is connected to the lava drive pump 5, and the other end is connected to the interior of the lava storage tank 4. The circulation pipe 12 surrounds the outside of the cracking furnace 15.

[0023] The shell 1 is provided with a heat insulation layer 13 and a reflective layer 14 on the inner wall of the shell 1. The heat insulation layer is a composite layer of lightweight high-alumina refractory fiber cotton and aluminum silicate refractory felt. The bottom layer is aluminum refractory fiber cotton and the top layer is aluminum silicate refractory felt. A high-temperature resistant aluminum foil air barrier layer is bonded between the two layers. The reflective layer is a multi-group semi-circular bump structure and its surface is uniformly coated with nano-composite infrared reflective coating.

[0024] The decoking unit includes a fixed bracket 17, which is located inside the pyrolysis furnace 15. A bearing 18 is provided in the middle of the fixed bracket 17, and a rotating shaft 19 is fixedly installed on the inner ring of the bearing 18.

[0025] Fixed rods 22 are fixedly installed at both ends of the rotating shaft 19. A connecting rod 27 with a limit block at the top is movably installed inside the fixed rod 22. A spring 28 is provided between the fixed rod 22 and the limit block at the top of the connecting rod 27.

[0026] A guide rod 23 is fixedly installed at the lower end of the connecting rod 27. A scraper 24 is movably installed on the guide rod 23. A counterweight 26 is fixedly installed at both ends of the guide rod 23. A spring 25 is fixedly installed at one end of the guide rod 23. The other end of the spring 25 is fixedly connected to the end of the scraper 24.

[0027] The pyrolysis furnace 15 is equipped with a spiral conveyor belt 20, with protrusion 1 21 between the spiral conveyor belts 20, and protrusion 29 at the discharge end of the pyrolysis furnace 15. The highest end of protrusion 1 21 is lower than the height of the spiral conveyor belt 20, and the highest end of protrusion 29 is higher than the height of the spiral conveyor belt 20.

[0028] Spring 1 (25) and Spring 2 (28) are made of high-temperature resistant alloy material, specifically 60Si2Mn alloy steel. This type of material can effectively resist creep and oxidation at high temperatures and maintain stable elasticity. Bearing 18 is also made of high-temperature resistant material, specifically martensitic stainless steel, which combines high-temperature resistance, wear resistance, and corrosion resistance, making it suitable for the complex working conditions of the pyrolysis furnace.

[0029] The rotating unit includes a base 6, which is located inside the housing 1. A motor 7 is fixedly mounted on the base 6. A drive gear 8 is fixedly mounted on the end of the output shaft of the motor 7. A driven gear 9 is provided on the drive gear 8. The driven gear 9 is located on the outer ring of the feed port 2. An auxiliary gear 16 is provided on the opposite side of the driven gear 9. The auxiliary gear 16 is rotatably mounted on the auxiliary gear bracket. A guide rail 11 is provided on the outside of the discharge port 3. Auxiliary wheels 10 are provided on both sides of the guide rail 11.

[0030] A continuous pyrolysis process using lava heating, employing a continuous pyrolysis furnace using lava heating, includes the following steps: S1: Add high-temperature lava medium into the lava storage tank, start the built-in heating device of the storage tank to heat the lava to 480~520℃ and maintain the constant temperature, start the lava drive pump, so that the lava forms a closed circulation in the circulation pipeline surrounding the pyrolysis furnace through the high-temperature resistant steel pipe, relying on the heat-locking of the shell insulation layer and the heat-concentrating of the reflective layer to preheat the pyrolysis furnace to a constant high temperature of 480~520℃; S2: After being crushed and pre-treated to remove impurities, organic waste is continuously and quantitatively fed into the pyrolysis furnace from the feed inlet by an oxygen-free sealed feeder, so that the pyrolysis furnace is always in an oxygen-free or oxygen-deficient state. S3: Start the motor of the pyrolysis furnace rotating unit. Through the meshing transmission of the drive gear and the driven gear, drive the pyrolysis furnace to rotate at a constant speed of 2-5 revolutions per minute. The auxiliary gear, auxiliary wheel and guide rail work together to limit the furnace body offset. Under the dual action of the furnace body rotation and the spiral conveyor belt, the organic waste moves slowly in a spiral manner along the furnace cavity towards the discharge port. S4: Organic waste undergoes continuous pyrolysis in a high-temperature constant-temperature environment heated by molten lava. The protrusions between the spiral conveyors rotate with the furnace body to assist in the turning of the material and improve the fullness of the pyrolysis. At the same time, the scraper of the decoking unit always adheres to the inner wall of the furnace body under the elastic force of springs one and two. When passing through protrusions one and two, it completes the "lifting-energy storage-falling-scraping" cycle action, realizing the simultaneous operation of pyrolysis and automatic decoking. The coke residue generated by decoking moves towards the discharge port along with the material. S5: The pyrolysis gas generated by pyrolysis is collected in real time through a dedicated gas path at the top of the pyrolysis furnace and transported to a condensation and separation device for processing. The condensable components are condensed into pyrolysis oil for collection and storage, while the non-condensable combustible gas is transported to the lava storage tank heating device for reuse as fuel. S6: The solid residue from the pyrolysis and the coke residue from the decoking process are continuously discharged from the outlet under the combined action of the screw conveyor belt and the rotation of the furnace body. After subsequent screening and processing, the residue is utilized as a resource. S7: The temperature of the lava in the lava tank and the temperature inside the pyrolysis furnace are continuously monitored throughout the pyrolysis process. The power of the heating device in the lava tank and the rotation speed of the furnace are finely adjusted in real time based on the monitoring data to ensure the stability of the pyrolysis process parameters. The lava continuously circulates and exchanges heat in the circulation pipeline to achieve efficient heat utilization. The pyrolysis furnace maintains a continuous feeding, continuous pyrolysis and continuous discharge operation throughout the process.

[0031] The motor 7 of the rotating unit is started, which drives the drive gear 8 to rotate, thereby driving the driven gear 9 and the pyrolysis furnace 15 to rotate synchronously and smoothly. The auxiliary gear 16 plays a role in reversing and supporting. The guide rail 11 at the discharge end cooperates with the auxiliary wheel 10 to ensure that the furnace body rotates without deviation. Organic waste enters the pyrolysis furnace 15 from the feed port 2 and moves continuously along the furnace cavity towards the discharge port 3 under the dual action of the furnace body rotation and the spiral conveyor belt 20.

[0032] During the slow rotation of the pyrolysis furnace 15, the scraper 24 of the decoking unit remains in contact with the inner wall of the furnace under the elastic thrust of spring 25. When the scraper 24 rotates with the furnace to the positions of protrusion 21 and protrusion 29, because the cross-section of the protrusion is sloping and its direction is consistent with the rotation direction of the furnace, the scraper 24 slowly moves upward along the slope of the protrusion, achieving a slight lift. During the lifting process of the scraper 24, spring 25 is stretched and spring 28 extends and retracts upward with the connecting rod 27, storing elastic potential energy. When the scraper 24 rotates past the highest point of the protrusion, under the gravity of the counterweights 26 at both ends of the guide rod 23, the scraper 24 falls rapidly, restoring its contact with the inner wall of the furnace. During the fall, it scrapes the coke residue on the inner wall of the furnace, achieving coke residue cleaning.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A continuous pyrolysis furnace using lava heating, comprising a shell (1), characterized in that, The shell (1) is equipped with a pyrolysis furnace (15) inside. One end of the pyrolysis furnace (15) is equipped with a feed inlet (2) and the other end is equipped with a discharge outlet (3). The top of the shell (1) is equipped with a lava tank (4). The lava tank (4) is equipped with a heating device. The side of the lava tank (4) is equipped with a lava drive pump (5). The lava tank (4) and the lava drive pump (5) are connected by a high-temperature resistant steel pipe. A heating unit is provided between the shell (1) and the pyrolysis furnace (15) for heating and maintaining the pyrolysis furnace in a high-temperature environment. A decoking unit is provided inside the pyrolysis furnace (15). Rotating units are provided on both sides of the pyrolysis furnace (15) for driving the pyrolysis furnace (15) to rotate, so that the pyrolysis is more complete. The heating unit also includes a circulation pipeline (12), one end of which passes through the shell (1) and is connected to the lava drive pump (5), and the other end is connected to the interior of the lava storage tank (4). The circulation pipeline (12) surrounds the outside of the pyrolysis furnace (15).

2. The continuous pyrolysis furnace using lava heating according to claim 1, characterized in that, The housing (1) is provided with a heat insulation layer (13) and the inner wall of the housing (1) is provided with a reflective layer (14).

3. A continuous pyrolysis furnace using lava heating according to claim 1, characterized in that, The decoking unit includes a fixed bracket (17), which is located inside the pyrolysis furnace (15). A bearing (18) is provided in the middle of the fixed bracket (17), and a rotating shaft (19) is fixedly installed on the inner ring of the bearing (18).

4. A continuous pyrolysis furnace using lava heating according to claim 3, characterized in that, Fixed rods (22) are fixedly installed at both ends of the rotating shaft (19). A connecting rod (27) with a limit block at the top is movably installed inside the fixed rod (22). A spring (28) is provided between the fixed rod (22) and the limit block at the top of the connecting rod (27).

5. A continuous pyrolysis furnace using lava heating according to claim 4, characterized in that, A guide rod (23) is fixedly installed at the lower end of the connecting rod (27). A scraper (24) is movably installed on the guide rod (23). A counterweight (26) is fixedly installed at both ends of the guide rod (23). A spring (25) is fixedly installed at one end of the guide rod (23). The other end of the spring (25) is fixedly connected to the end of the scraper (24).

6. A continuous pyrolysis furnace using lava heating according to claim 5, characterized in that, The pyrolysis furnace (15) is equipped with a spiral conveyor belt (20), and a first protrusion (21) is provided between the spiral conveyor belts (20). The discharge end of the pyrolysis furnace (15) is equipped with a second protrusion (29). The highest end of the first protrusion (21) is lower than the height of the spiral conveyor belt (20), and the highest end of the second protrusion (29) is higher than the height of the spiral conveyor belt (20).

7. A continuous pyrolysis furnace using lava heating according to claim 1, characterized in that, The rotating unit includes a base (6), which is located inside the housing (1). A motor (7) is fixedly installed on the base (6). A drive gear (8) is fixedly installed at the end of the output shaft of the motor (7). A driven gear (9) is provided on the drive gear (8). The driven gear (9) is located on the outer ring of the feed port (2). An auxiliary gear (16) is provided on the opposite side of the driven gear (9). The auxiliary gear (16) is rotatably installed on the auxiliary gear bracket. A guide rail (11) is provided outside the discharge port (3). Auxiliary wheels (10) are provided on both sides of the guide rail (11).

8. A continuous pyrolysis process using lava heating, employing a continuous pyrolysis furnace using lava heating as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Add high-temperature lava medium into the lava storage tank, start the built-in heating device of the storage tank to heat the lava to 480-520℃ and maintain the constant temperature, start the lava drive pump, so that the lava forms a closed circulation in the circulation pipeline surrounding the pyrolysis furnace through the high-temperature resistant steel pipe, and rely on the heat-locking of the shell insulation layer and the heat-concentrating of the reflective layer to preheat the pyrolysis furnace to a constant high temperature of 480-520℃ for pyrolysis; S2: After being crushed and pre-treated to remove impurities, organic waste is continuously and quantitatively fed into the pyrolysis furnace from the feed inlet by an oxygen-free sealed feeder, so that the pyrolysis furnace is always in an oxygen-free or oxygen-deficient state. S3: Start the motor of the pyrolysis furnace rotating unit. Through the meshing transmission of the drive gear and the driven gear, drive the pyrolysis furnace to rotate at a constant speed of 2-5 revolutions per minute. The auxiliary gear, auxiliary wheel and guide rail work together to limit the furnace body offset. Under the dual action of the furnace body rotation and the spiral conveyor belt, the organic waste moves slowly in a spiral manner along the furnace cavity towards the discharge port. S4: Organic waste undergoes continuous pyrolysis in a high-temperature constant-temperature environment heated by molten lava. The protrusions between the spiral conveyors rotate with the furnace body to assist in the turning of the material and improve the fullness of the pyrolysis. At the same time, the scraper of the decoking unit always adheres to the inner wall of the furnace body under the elastic force of springs one and two. When passing through protrusions one and two, it completes the "lifting-energy storage-falling-scraping" cycle action, realizing the simultaneous operation of pyrolysis and automatic decoking. The coke residue generated by decoking moves towards the discharge port along with the material. S5: The pyrolysis gas generated by pyrolysis is collected in real time through a dedicated gas path at the top of the pyrolysis furnace and transported to a condensation and separation device for processing. The condensable components are condensed into pyrolysis oil for collection and storage, while the non-condensable combustible gas is transported to the lava storage tank heating device for reuse as fuel. S6: The solid residue from the pyrolysis and the coke residue from the decoking process are continuously discharged from the outlet under the combined action of the screw conveyor belt and the rotation of the furnace body. After subsequent screening and processing, the residue is utilized as a resource. S7: The temperature of the lava in the lava tank and the temperature inside the pyrolysis furnace are continuously monitored throughout the pyrolysis process. The power of the heating device in the lava tank and the rotation speed of the furnace are finely adjusted in real time based on the monitoring data to ensure the stability of the pyrolysis process parameters. The lava continuously circulates and exchanges heat in the circulation pipeline to achieve efficient heat utilization. The pyrolysis furnace maintains a continuous feeding, continuous pyrolysis and continuous discharge operation throughout the process.

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