A built-in double-layer flexible rotary pyrolysis device and a pyrolysis method thereof

Abstract

This application discloses a built-in double-layer flexible rotary pyrolysis device and its pyrolysis method. The pyrolysis device includes: a pyrolysis furnace, an inner flexible reaction cage, an outer flexible reaction cage, an outer scraper assembly, an inner scraper assembly, and a feed cylinder. The pyrolysis furnace has a cavity, within which the inner and outer flexible reaction cages are located. One end of the feed cylinder extends into the pyrolysis furnace and further into the inner flexible reaction cage. A drive mechanism is coupled to both the outer and inner flexible reaction cages, driving them to rotate in the same direction. By setting a double-layer nested structure of the inner and outer flexible reaction cages, this application allows the material to complete a two-stage pyrolysis process sequentially in the inner and outer layers. This achieves a processing path equivalent to a multi-stage reaction within a single pyrolysis furnace, effectively extending the material's reaction residence time and significantly improving the sufficiency and thoroughness of the pyrolysis.

Description

Technical Field

[0001] This application relates to the field of pyrolysis technology, specifically to a built-in double-layer flexible rotary pyrolysis device and its pyrolysis method. Background Technology

[0002] Organic waste pyrolysis technology has been widely applied in the treatment of agricultural and forestry waste, waste plastics, waste rubber, textile waste, and other materials due to its ability to achieve harmless, volume-reduced, and resource-based treatment. Traditional horizontal / vertical pyrolysis devices mostly adopt a single-layer reaction chamber or single-layer reaction cage structure. The material can only complete a single heating process within the device, resulting in a short reaction path and limited effective residence time. This makes it difficult to ensure the complete decomposition of large-sized, highly tough, and difficult-to-pyrolyze materials, and easily leads to problems such as incomplete pyrolysis, high organic matter content in the residue, and unstable product quality.

[0003] To extend the residence time of materials and improve the sufficiency of pyrolysis, existing technologies typically employ methods such as increasing the size of the equipment, connecting multiple pyrolysis units in series, or extending the length of the reaction chamber. However, these solutions significantly increase the equipment footprint, manufacturing costs, and operating energy consumption, resulting in a bulky pyrolysis system structure and low space utilization, which is not conducive to miniaturization and distributed application.

[0004] Therefore, existing pyrolysis equipment still suffers from technical defects such as insufficient residence time, incomplete pyrolysis, large equipment size, and low space utilization, making it difficult to achieve long-term, high-efficiency, and high-conversion pyrolysis reactions of materials in a compact space.

[0005] In view of this, the present invention is hereby proposed. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a built-in double-layer flexible rotary pyrolysis device and its pyrolysis method.

[0007] This application provides the following technical solution:

[0008] In a first aspect, this application provides a built-in double-layer flexible rotary pyrolysis device, comprising:

[0009] A pyrolysis furnace having a cavity;

[0010] An inner flexible reaction cage is located inside the cavity and is rotatably mounted on the pyrolysis furnace.

[0011] An outer flexible reaction cage is located inside the cavity and sleeved on the outside of the inner flexible reaction cage. The outer flexible reaction cage is rotatably mounted on the pyrolysis furnace, and the rotation axes of the outer flexible reaction cage and the inner flexible reaction cage are collinear.

[0012] Both the outer scraper assembly and the inner scraper assembly are disposed within the cavity. The outer scraper assembly is in contact with the outer flexible reaction cage, and the inner scraper assembly is in contact with the inner flexible reaction cage.

[0013] A feed cylinder, one end of which extends into the pyrolysis furnace and into the inner flexible reaction cage;

[0014] A driving mechanism is provided, which is in transmission cooperation with the outer flexible reaction cage and the inner flexible reaction cage respectively, to drive the inner flexible reaction cage and the outer flexible reaction cage to rotate in the same direction.

[0015] Optionally, the driving mechanism includes a first driving member and a second driving member;

[0016] The first driving member and the second driving member are respectively disposed on both sides of the pyrolysis furnace along the rotation axis;

[0017] The first driving member is connected to the outer flexible reaction cage to drive the outer flexible reaction cage to rotate;

[0018] The second driving component is connected to the inner flexible reaction cage to drive the inner flexible reaction cage to rotate.

[0019] Optionally, the outer flexible reaction cage includes an outer main end plate, an outer slave end plate, and outer flexible wires, with each of the outer flexible wires arranged sequentially around the outer main end plate in the circumferential direction, and the two ends of each outer flexible wire being connected to the outer main end plate and the outer slave end plate, respectively.

[0020] The first driving member is rotatably disposed on the pyrolysis furnace and connected to the outer main end plate.

[0021] Optionally, the outer main end plate is rotatably sleeved on the feed cylinder;

[0022] The first driving component is a cylinder, which is rotatably sleeved on the outside of the feed cylinder. The first driving component is rotatably disposed on the pyrolysis furnace and connected to the outer main end plate.

[0023] Optionally, the inner flexible reaction cage includes an inner main end plate, an inner slave end plate, and inner flexible wires, with each inner flexible wire arranged sequentially around the inner main end plate in the circumferential direction, and the two ends of each inner flexible wire being connected to the inner main end plate and the inner slave end plate, respectively.

[0024] The inner main end plate and the inner slave end plate are located between the outer main end plate and the outer slave end plate, and the outer main end plate and the inner main end plate are located on opposite sides of the pyrolysis furnace;

[0025] The second driving member is rotatably disposed in the pyrolysis furnace and passes through the outer slave end plate and is connected to the inner main end plate.

[0026] Optionally, the second drive member is equipped with bearings between the pyrolysis furnace and the outer end plate, respectively;

[0027] Bearings are respectively provided between the feed cylinder and the inner slave end plate, the outer main end plate and the first driving member;

[0028] A bearing is provided between the first driving component and the pyrolysis furnace.

[0029] Optionally, the outer scraper assembly is disposed on the inner wall of the pyrolysis furnace, and the outer scraper assembly is in contact with the outer flexible reaction cage;

[0030] An annular cavity is formed between the inner flexible reaction cage and the outer flexible reaction cage;

[0031] The inner scraper assembly is located inside the annular cavity and is in contact with the inner flexible reaction cage.

[0032] Optionally, the inner scraper assembly includes an inner support and multiple flexible scrapers;

[0033] The inner support includes a radial extension and an axial extension;

[0034] The feed cylinder extends along the rotation axis, the radial extension is perpendicularly connected to the feed cylinder, the axial extension is perpendicularly connected to the radial extension, and the axial extension extends along the rotation axis;

[0035] Each of the flexible scrapers is connected to the axial extension, and the flexible scraper is in contact with the inner flexible reaction cage.

[0036] Optionally, a reaction zone and a separation zone are arranged sequentially along the circumference of the rotation axis inside the cavity;

[0037] The axis of rotation is located on a vertical center plane, and the vertical center plane is perpendicular to the horizontal plane;

[0038] The reaction zone and the separation zone are located on opposite sides of the vertical center plane;

[0039] The bottom of the pyrolysis furnace is provided with a discharge port, which is located on the side of the separation zone near the vertical center plane;

[0040] Both the outer scraper assembly and the inner scraper assembly are located in the middle of the separation zone;

[0041] During the process of the inner flexible reaction cage and the outer flexible reaction cage rotating in the same direction, some of the material that is peeled off by the inner scraper assembly on the inner flexible reaction cage falls onto the outer flexible reaction cage, and under the drive of the outer flexible reaction cage, passes through the reaction zone and the separation zone in sequence and is peeled off by the outer scraper assembly.

[0042] Secondly, embodiments of this application also provide a pyrolysis method with a built-in double-layer flexible rotary pyrolysis device, including:

[0043] Step S1: The driving mechanism drives the inner flexible reaction cage and the outer flexible reaction cage to rotate in the same direction, while heating the pyrolysis furnace to the set temperature.

[0044] Step S2: The raw material is fed into the inner flexible reaction cage through the feed cylinder. As the temperature rises, the material softens and adheres to the inner flexible reaction cage and undergoes pyrolysis.

[0045] Step S3: The inner flexible reaction cage rotates, driving the material from the reaction zone into the separation zone. In the separation zone, the material is peeled off by the inner scraper assembly. At least part of the peeled material falls onto the outer flexible reaction cage and rotates with it.

[0046] Step S4: The outer flexible reaction cage rotates, driving the material from the reaction zone into the separation zone, and the material is peeled off in the separation zone by the outer scraper assembly.

[0047] By adopting the above technical solution, this application has the following beneficial effects:

[0048] This application employs a double-layer nested structure with an inner flexible reaction cage and an outer flexible reaction cage, enabling the material to complete a two-stage pyrolysis process sequentially in the inner and outer layers. This achieves a processing path equivalent to a multi-stage reaction within a single pyrolysis furnace, effectively extending the material's reaction residence time and significantly improving the sufficiency and thoroughness of the pyrolysis.

[0049] The specific embodiments of the present invention will be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0050] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0051] Figure 1 This is a front sectional view of the built-in double-layer flexible rotary pyrolysis apparatus provided in an embodiment of the present disclosure;

[0052] Figure 2 This diagram shows a top view of the cross-sectional structure of the built-in double-layer flexible rotary pyrolysis device provided in an embodiment of this disclosure;

[0053] Figure 3This diagram shows a side view of the cross-sectional structure of the built-in double-layer flexible rotary pyrolysis device provided in an embodiment of the present disclosure.

[0054] Figure 4 This diagram shows a partial three-dimensional structural schematic of the flexible reaction cage of the built-in double-layer flexible rotary pyrolysis device provided in an embodiment of the present disclosure.

[0055] In the diagram: 1. Feed cylinder; 2. First driving component; 3a. Outer flexible reaction cage; 3b. Inner flexible reaction cage; 31. Flexible wire; 32. Wing; 33. Support rod; 34. Outer main end plate; 35. Outer secondary end plate; 36. Inner main end plate; 37. Inner secondary end plate; 4. Discharge port; 5. Pyrolysis furnace; 6. Second driving component; 7. Flexible scraper; 8. Gas outlet; 9. Inner support; A. Reaction zone; B. Separation zone; R. Radius of outer secondary end plate; r. Radius of inner secondary end plate.

[0056] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0058] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0059] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0060] like Figures 1 to 4As shown, this application provides a built-in double-layer flexible rotary pyrolysis device, including: a pyrolysis furnace 5, an inner flexible reaction cage 3b, an outer flexible reaction cage 3a, an outer scraper assembly, an inner scraper assembly, and a feed cylinder 1. The pyrolysis furnace 5 has a cavity. An inner flexible reaction cage 3b is located in the cavity and is rotatably disposed in the pyrolysis furnace 5. An outer flexible reaction cage 3a is located in the cavity and is sleeved on the outside of the inner flexible reaction cage 3b. The outer flexible reaction cage 3a is rotatably disposed in the pyrolysis furnace 5. The rotation axes of the outer flexible reaction cage 3a and the inner flexible reaction cage 3b are collinear. Both the outer scraper assembly and the inner scraper assembly are disposed in the cavity. The outer scraper assembly is in contact with the outer flexible reaction cage 3a, and the inner scraper assembly is in contact with the inner flexible reaction cage 3b. One end of the feed cylinder 1 extends into the pyrolysis furnace 5 and extends into the interior of the inner flexible reaction cage 3b. The drive mechanism is in transmission cooperation with the outer flexible reaction cage 3a and the inner flexible reaction cage 3b respectively, driving the inner flexible reaction cage 3b and the outer flexible reaction cage 3a to rotate in the same direction.

[0061] The pyrolysis furnace 5 serves as the outer shell and reaction carrier of the entire device, forming a sealed cavity structure inside. This cavity provides a stable, oxygen-free (or low-oxygen), and temperature-controlled environment for material pyrolysis. Heating components (such as electromagnetic heating, flue heat exchange, etc.) can be installed according to pyrolysis requirements to ensure that the preset pyrolysis temperature is maintained within the cavity, preventing heat loss and laying the foundation for complete pyrolysis of the material. The entire pyrolysis furnace 5 can be made of high-temperature resistant and corrosion-resistant materials to ensure long-term stable operation of the device.

[0062] The inner flexible reaction cage 3b is located inside the cavity of the pyrolysis furnace 5 and is connected to the pyrolysis furnace 5 by a rotatable installation method. The reaction cage is a flexible mesh structure, composed of high-temperature resistant flexible wires 31, fins 32, and other components, possessing a certain degree of elasticity and toughness. Its main function is to support the initial feed material and drive the material to move within the pyrolysis furnace 5 through its own rotation, ensuring uniform heating of the material. At the same time, the flexible structure can adapt to the softening and expansion characteristics of the material after heating, preventing the material from getting stuck or sticking together and clogging.

[0063] The outer flexible reaction cage 3a is also located within the cavity of the pyrolysis furnace 5, and is coaxially nested around the inner flexible reaction cage 3b. It is collinear with the rotation axis of the inner flexible reaction cage 3b and can be independently rotated within the pyrolysis furnace 5. Its structure is similar to that of the inner flexible reaction cage 3b, both being flexible mesh structures. However, parameters such as the mesh size and the density of the flexible wires 31 can be adjusted according to pyrolysis requirements. For example, the gap between the flexible wires 31 (inner flexible wires) of the inner flexible reaction cage 3b can be set larger than the gap between the flexible wires 31 (outer flexible wires) of the outer flexible reaction cage 3a, ensuring that materials falling from the inner layer can smoothly fall into the outer layer. The outer flexible reaction cage 3a receives the incompletely pyrolyzed material falling from the inner layer and continues to pyrolyze it, achieving secondary deep pyrolysis of the material.

[0064] Both the outer and inner scraper assemblies are fixedly installed within the cavity of the pyrolysis furnace 5, their positions matching the corresponding reaction cages. The scraping end of the inner scraper assembly is in close contact with the surface of the inner flexible reaction cage 3b, while the scraping end of the outer scraper assembly is in close contact with the surface of the outer flexible reaction cage 3a. The scraper assemblies employ an elastic scraper structure, providing a certain degree of cushioning to prevent damage to the flexible reaction cages. Their core function is to continuously scrape away softened materials and pyrolysis residues (such as coke) adhering to the cage surface during the cage's rotation, preventing clogging of the cage mesh, and simultaneously promoting the shedding of incompletely pyrolyzed materials from the inner layer to the outer layer, ensuring a continuous and smooth pyrolysis process.

[0065] The feed cylinder 1 penetrates the shell of the pyrolysis furnace 5 and extends into the cavity, with its end extending directly into the interior of the inner flexible reaction cage 3b. This ensures that the material to be processed (especially large strip-shaped materials) can be directly fed into the reaction zone A of the inner flexible reaction cage 3b without the need for an additional conveying mechanism, thus simplifying the feeding process. At the same time, it prevents the material from scattering into other areas of the cavity during the feeding process, ensuring that all the material participates in the pyrolysis reaction.

[0066] The drive mechanism, serving as the power source for the device, is coupled with the outer flexible reaction cage 3a and the inner flexible reaction cage 3b for transmission. It can independently adjust the rotation speed of the two reaction cages and drive the inner flexible reaction cage 3b and the outer flexible reaction cage 3a to rotate in the same direction. This design of rotating in the same direction ensures that the material can move along a preset path in both cages, extending the residence time of the material in the pyrolysis furnace 5.

[0067] In operation, the built-in double-layer flexible rotary pyrolysis device of this application first drives the inner and outer flexible reaction cages to rotate in the same direction at a set speed, while simultaneously heating the cavity of the pyrolysis furnace 5 to a preset pyrolysis temperature. After the temperature stabilizes, the organic waste to be treated is directly fed into the inner flexible reaction cage 3b through the feed cylinder 1. The material falls onto the flexible wires 31 of the inner cage and gradually moves with the rotation of the inner reaction cage, initiating the pyrolysis reaction in the high-temperature environment of the cavity. During rotation, the inner scraper assembly continuously scrapes the surface of the inner reaction cage, peeling off incompletely pyrolyzed material and pyrolysis residues adhering to the cage. The incompletely pyrolyzed material falls onto the outer flexible reaction cage 3a under gravity. The outer flexible reaction cage 3a continues to drive the material to rotate, causing the material to pass through the high-temperature pyrolysis zone again, completing a secondary deep pyrolysis and further decomposing the organic matter in the material. Simultaneously, the outer scraper assembly scrapes the surface of the outer reaction cage, peeling off the completely pyrolyzed residue. The residue falls through the cage mesh under gravity, completing the discharge. Throughout the process, the material undergoes preliminary pyrolysis in the inner layer and deep pyrolysis in the outer layer, achieving full decomposition. The gas generated by pyrolysis can be discharged through the preset gas outlet 8 of the pyrolysis furnace 5 for subsequent condensation and recovery.

[0068] This application's built-in double-layer flexible rotary pyrolysis device, through optimized structural design, effectively addresses the technical shortcomings of traditional pyrolysis devices, such as short material residence time, incomplete pyrolysis, large equipment size, and low space utilization. By adopting an inner and outer double-layer coaxial nested structure, the material reaction residence time is significantly extended, improving the sufficiency and thoroughness of pyrolysis. Through the coaxial nesting of the inner and outer flexible reaction cages 3a, the material does not pass through the pyrolysis zone only once. Instead, it first undergoes preliminary pyrolysis in the inner layer, and then, after being peeled off by the scraper assembly, enters the outer layer for secondary deep pyrolysis. This is equivalent to achieving "two-stage series pyrolysis" within a single pyrolysis furnace 5, significantly extending the effective reaction residence time of the material in a high-temperature environment. This effectively solves the problems of incomplete material pyrolysis and high organic matter content in the residue of traditional single-layer reaction structures, significantly improving the pyrolysis conversion rate of the material, ensuring more thorough pyrolysis, and simultaneously improving the quality of the pyrolysis products (solid, liquid, and gas).

[0069] In this application, the double-layer nested layout is compact, significantly saving equipment space and improving space utilization. The inner and outer flexible reaction cages are coaxially nested within the same pyrolysis furnace cavity 5, sharing a single heating environment and shell structure. This eliminates the need for additional pyrolysis equipment or extending the reaction chamber length. While achieving "two-stage pyrolysis," it significantly reduces the equipment's footprint and overall volume. Compared to traditional multi-stage series pyrolysis devices, space utilization is improved by more than 30%. The compact structure and reasonable layout are more suitable for the promotion and application of miniaturized and distributed pyrolysis scenarios, reducing equipment installation and transportation costs.

[0070] In this application, the inner and outer double-layer scraper assemblies work together to effectively solve the problems of material adhesion and cage blockage, ensuring continuous pyrolysis. The inner and outer scraper assemblies are in close contact with the corresponding reaction cages, continuously scraping away the softened material and pyrolysis residue adhering to the surface during cage rotation. This fundamentally solves the problem in traditional pyrolysis devices where materials easily adhere and block the cage or reaction chamber after softening due to heat, ensuring smooth material transport and uninterrupted pyrolysis, further improving the stability and reliability of the device operation.

[0071] In this application, the feeding method is simple and reliable, suitable for large-sized strip-shaped materials, and simplifies the pretreatment process. The feeding cylinder 1 extends directly into the inner flexible reaction cage 3b, which can directly feed large-sized strip-shaped, fibrous, and other materials into the reaction zone A without the need for material crushing pretreatment, saving crushing equipment and related energy consumption, simplifying the pyrolysis process, reducing system operating costs, and avoiding dust pollution generated during the crushing process, making it more environmentally friendly.

[0072] In this application, both the inner and outer layers adopt a flexible mesh structure, which can adapt to the softening, expansion and contraction characteristics of the material after heating, avoid material jamming or local overheating. At the same time, the mesh structure increases the contact area between the material and the high-temperature environment, making the material heat more uniform, further improving the pyrolysis efficiency and sufficiency, and reducing the residue of unpyrolyzed material in some areas.

[0073] In some possible implementations, the driving mechanism includes a first driving member 2 and a second driving member 6, which are respectively disposed on both sides of the pyrolysis furnace 5 along the rotation axis. The first driving member 2 is connected to the outer flexible reaction cage 3a to drive the outer flexible reaction cage 3a to rotate, and the second driving member 6 is connected to the inner flexible reaction cage 3b to drive the inner flexible reaction cage 3b to rotate.

[0074] In this application, the driving mechanism includes a first driving component 2 and a second driving component 6. The first driving component 2 and the second driving component 6 are respectively disposed on both sides of the pyrolysis furnace 5 along the rotation axis. The first driving component 2 is connected to the outer flexible reaction cage 3a to drive the outer flexible reaction cage 3a to rotate, and the second driving component 6 is connected to the inner flexible reaction cage 3b to drive the inner flexible reaction cage 3b to rotate. This symmetrical arrangement allows the two reaction cages to be subjected to more balanced forces and rotate more smoothly, while also facilitating separate maintenance and debugging, thus improving the operational reliability of the driving mechanism.

[0075] In some possible implementations, the outer flexible reaction cage 3a includes an outer main end plate 34, an outer slave end plate 35, and outer flexible wires. Each of the outer flexible wires is arranged sequentially around the outer main end plate 34, and both ends of each outer flexible wire are connected to the outer main end plate 34 and the outer slave end plate 35, respectively. The first driving member 2 is rotatably mounted on the pyrolysis furnace 5 and connected to the outer main end plate 34. The outer main end plate 34 and the outer slave end plate 35 serve to fix the outer flexible wires and transmit driving force, ensuring the stability of the cage structure when the outer flexible reaction cage 3a rotates and preventing the outer flexible wires from easily falling off. The first driving member 2 is rotatably mounted on the pyrolysis furnace 5 and fixedly connected to the outer main end plate 34. By driving the outer main end plate 34 to rotate, the entire outer flexible reaction cage 3a can be driven to rotate synchronously, resulting in high transmission efficiency and a simple structure.

[0076] In some possible implementations, the outer main end plate 34 is rotatably sleeved on the feed cylinder 1, the first driving member 2 is a cylinder body, the first driving member 2 is rotatably sleeved on the outside of the feed cylinder 1, the first driving member 2 is rotatably disposed on the pyrolysis furnace 5, and connected to the outer main end plate 34.

[0077] The outer main end plate 34 is rotatably sleeved on the outside of the feed cylinder 1, ensuring that the outer main end plate 34 and the feed cylinder 1 do not interfere with each other, and that the outer main end plate 34 can rotate smoothly while the feed cylinder 1 is fixedly feeding. The first driving member 2 is a cylindrical structure, which is rotatably sleeved on the outside of the feed cylinder 1 and rotatably mounted on the shell (sealed shell) of the pyrolysis furnace 5. The first driving member 2 is fixedly connected to the outer main end plate 34. This structure can make full use of space, making the layout of the driving mechanism and the feeding structure more compact, avoiding the occupation of extra space, and further improving the space utilization rate of the equipment. At the same time, the first driving member 2 of the cylindrical structure can provide a certain degree of protection for the feed cylinder 1.

[0078] In some possible implementations, the inner flexible reaction cage 3b includes an inner main end plate 36, an inner secondary end plate 37, and inner flexible wires. Each of the inner flexible wires is arranged sequentially around the inner main end plate 36 in the circumferential direction, and the two ends of each inner flexible wire are respectively connected to the inner main end plate 36 and the inner secondary end plate 37. The inner main end plate 36 and the inner secondary end plate 37 are located between the outer main end plate 34 and the outer secondary end plate 35, and the outer main end plate 34 and the inner main end plate 36 are located on opposite sides of the pyrolysis furnace. The second driving member 6 is rotatably disposed on the pyrolysis furnace 5 and passes through the outer secondary end plate 35 and is connected to the inner main end plate 36.

[0079] The inner main end plate 36 and the inner slave end plate 37 are both located between the outer main end plate 34 and the outer slave end plate 35, and the outer main end plate 34 and the inner main end plate 36 are located on opposite sides of the pyrolysis furnace 5. This arrangement allows for a more rational transmission of the driving force between the two reaction cages and avoids interference between the driving mechanisms. The second driving member 6 is rotatably mounted at the other end of the pyrolysis furnace 5 and passes through the outer slave end plate 35 before being fixedly connected to the inner main end plate 36. The second driving member 6 and the outer slave end plate 35 are rotatably coupled to ensure that the rotation of the outer flexible reaction cage 3a does not affect the normal operation of the second driving member 6, thereby enabling the independent rotation of the inner flexible reaction cage 3b. It should be noted that the first driving member 2 and the second driving member 6 can be selected from shaft or cylinder structures according to actual installation requirements to adapt to different transmission scenarios and spatial layouts, thereby improving the design flexibility of the device.

[0080] In some possible implementations, the second drive member 6 is equipped with bearings between the pyrolysis furnace 5 and the outer slave end plate 35, the feed cylinder 1 is equipped with bearings between the inner slave end plate 37, the outer main end plate 34 and the first drive member 2, and the first drive member 2 is equipped with a bearing between the pyrolysis furnace 5.

[0081] The bearings between the feed cylinder 1 and the inner slave end plate 37 and the outer main end plate 34 ensure that the feed cylinder 1 and the two layers of reaction cage end plates do not interfere with each other. This ensures that the feed cylinder 1 remains fixed and feeds stably, while the inner slave end plate 37 and the outer main end plate 34 can rotate relative to each other. The bearing between the feed cylinder 1 and the first drive component 2, in conjunction with the bearing between the first drive component 2 and the pyrolysis furnace 5, ensures that the first drive component 2 rotates stably around the feed cylinder 1. This guarantees the stable transmission of driving force from the first drive component 2 to the outer flexible reaction cage 3a, while also reducing rotational wear between the first drive component 2 and the feed cylinder 1 and the pyrolysis furnace 5, reducing equipment operating noise, and extending the service life of the drive mechanism and the feeding structure. All bearings are selected from high-temperature resistant models, adapted to the high-temperature working environment inside the pyrolysis furnace 5, ensuring that the bearings can still work stably at the preset pyrolysis temperature, further improving the operational reliability and service life of the entire device. To ensure smooth rotation of the second driving component 6, reduce rotational friction, and avoid wear between it and the pyrolysis furnace 5 and the outer end plate 35, bearings are installed between the second driving component 6 and the pyrolysis furnace 5 and the outer end plate 35, respectively. The bearings achieve rotational engagement, which not only ensures the rotational accuracy of the second driving component 6, but also effectively reduces rotational resistance. This ensures that the rotation of the outer flexible reaction cage 3a does not affect the normal operation of the second driving component 6, thereby enabling the independent rotation of the inner flexible reaction cage 3b.

[0082] In this application, the flexible reaction cage is divided into inner and outer layers. Both the inner and outer flexible reaction cages 3a are horizontally placed hollow cylindrical structures, and are coaxially rotatable within the sealed outer shell of the pyrolysis furnace 5. The inner flexible reaction cage 3b is located inside the outer flexible reaction cage 3a. Multiple axial support rods 33 are connected between the outer main end plate 34 and the outer secondary end plate 35, and between the inner main end plate 36 and the inner secondary end plate 37. Multiple wing rods 32 extend radially from the outer edges of the outer main end plate 34 and the outer secondary end plate 35, and multiple flexible wires 31 are connected between the free ends of the opposing wing rods 32, together forming the outer flexible reaction cage 3a. Multiple wing rods 32 extend radially from the outer edges of the inner main end plate 36 and the inner secondary end plate 37, and multiple flexible wires 31 are connected between the free ends of the opposing wing rods 32, together forming the inner flexible reaction cage 3b.

[0083] In some possible implementations, the outer scraper assembly is disposed on the inner wall of the pyrolysis furnace 5, the outer scraper assembly is in contact with the outer flexible reaction cage 3a, an annular cavity is formed between the inner flexible reaction cage 3b and the outer flexible reaction cage 3a, the inner scraper assembly is located in the annular cavity and is in contact with the inner flexible reaction cage 3b.

[0084] In this application, the outer scraper assembly is fixedly mounted on the inner wall of the pyrolysis furnace 5, with its scraping end facing the outer side of the outer flexible reaction cage 3a and in close contact with the outer wall of the outer flexible reaction cage 3a. This arrangement can fully utilize the installation space on the inner wall of the pyrolysis furnace 5 and stably scrape off the adhesive materials and residues on the surface of the outer flexible reaction cage 3a. Since the outer flexible reaction cage is fitted inside the inner flexible reaction cage, an annular cavity is naturally formed between them. This annular cavity provides dedicated installation space for the inner scraper assembly. Therefore, the inner scraper assembly is set inside the annular cavity, with its scraping end facing the outer wall of the inner flexible reaction cage 3b and in close contact with the inner flexible reaction cage 3b.

[0085] The advantage of this partitioned layout design lies in the fact that the outer and inner scraper assemblies operate independently without interference. The outer scraper assembly focuses on cleaning the outer flexible reaction cage 3a, while the inner scraper assembly focuses on cleaning the inner flexible reaction cage 3b, ensuring the targeted and effective scraping cleaning. Simultaneously, the inner scraper assembly is located within the annular cavity, occupying no additional space inside the pyrolysis furnace 5 and not affecting the material's path from the inner to the outer layer, ensuring smooth material transfer and further optimizing the spatial layout of the device, thus improving space utilization.

[0086] In some possible implementations, the inner scraper assembly includes an inner support 9 and a plurality of flexible scrapers 7. The inner support 9 includes a radial extension and an axial extension. The feed cylinder 1 extends along the rotation axis of the inner flexible reaction cage. The radial extension is perpendicularly connected to the feed cylinder 1, and the axial extension is perpendicularly connected to the radial extension. The axial extension extends along the rotation axis, and each of the flexible scrapers 7 is connected to the axial extension. The flexible scrapers 7 are in contact with the inner flexible reaction cage 3b.

[0087] The inner scraper assembly specifically includes an inner support 9 and multiple flexible scrapers 7. The inner support 9 serves as the mounting carrier for the flexible scrapers 7, and its structural design is adapted to the spatial layout of the annular cavity and the installation position of the feed cylinder 1, ensuring stable installation without affecting material transfer. Specifically, the inner support 9 includes a radial extension and an axial extension. To achieve stable fixation of the inner support 9, the radial extension is vertically connected to the outer wall of the feed cylinder 1. The connection method can be welding, bolt fixing, or other high-temperature resistant and high-strength fixing methods, ensuring that the inner support 9 remains fixed with the feed cylinder 1 and does not rotate with the inner flexible reaction cage 3b. The axial extension is vertically connected to the free end of the radial extension, and the axial extension extends along the rotation axis. Its extension length is adapted to the axial length of the inner flexible reaction cage 3b, ensuring that the flexible scrapers 7 can cover the entire axial area of ​​the inner flexible reaction cage 3b, achieving comprehensive scraping and cleaning.

[0088] Each of the flexible scrapers 7 is evenly spaced and connected to the axial extension, with the connection position facing the inner flexible reaction cage 3b. The scraping end of each flexible scraper 7 is in close contact with the cage surface of the inner flexible reaction cage 3b. The contact pressure can be adapted according to the elastic characteristics of the flexible scraper 7, ensuring scraping effectiveness while avoiding excessive scraping force that could damage the flexible filaments 31 of the inner flexible reaction cage 3b. The multiple flexible scrapers 7 are evenly arranged along the axial extension, achieving complete coverage of the circumference of the inner flexible reaction cage 3b, avoiding scraping blind spots, and ensuring that softened materials and pyrolysis residues on the surface of the inner flexible reaction cage 3b are effectively scraped off. The flexible scrapers 7 can adopt an elastic structure to adapt to the slight vibrations during the rotation of the inner flexible reaction cage 3b and the volume changes of the material after heating, avoiding rigid friction between the scraper and the cage, extending the service life of both, and ensuring the continuity and stability of the scraping process.

[0089] In some possible implementations, reaction zone A and separation zone B are sequentially arranged circumferentially around the rotation axis of the inner flexible reaction cage within the cavity. The rotation axis is located on a vertical central plane, which is perpendicular to the horizontal plane. Reaction zone A and separation zone B are located on opposite sides of the vertical central plane. A discharge port 4 is provided at the bottom of the pyrolysis furnace 5. The discharge port 4 is located on the side of separation zone B closer to the vertical central plane. Both the outer scraper assembly and the inner scraper assembly are located in the middle of separation zone B. During the rotation of the inner flexible reaction cage 3b and the outer flexible reaction cage 3a in the same direction, some of the material peeled off by the inner scraper assembly on the inner flexible reaction cage 3b falls onto the outer flexible reaction cage 3a. Driven by the outer flexible reaction cage 3a, the material passes through reaction zone A and separation zone B sequentially and is peeled off by the outer scraper assembly.

[0090] Alternatively, the main body of the pyrolysis furnace 5 is a sealed shell, which is a horizontally placed hollow cylindrical structure. The sealed shell is provided with a discharge port 4 and a gas outlet 8. Inside the sealed shell, according to the vertical cross section through the axis, it is divided into two parts: a reaction zone A and a separation zone B. The top of the reaction zone A and the bottom of the separation zone B are the ends of their respective regions, and the bottom of the reaction zone A and the top of the separation zone B are the beginnings of their respective regions.

[0091] To further optimize the pyrolysis process and achieve orderly material pyrolysis and residue separation, the cavity of the pyrolysis furnace 5 is divided into a reaction zone A and a separation zone B along the circumferential direction of the rotation axis. The two zones are interconnected without obvious separation, forming a complete pyrolysis and separation space, adapted to the rotational trajectory of the double-layer flexible reaction cage. Reaction zone A is the core area for material pyrolysis, and the heating components of the pyrolysis furnace 5 are mainly arranged corresponding to reaction zone A to ensure that the preset high-temperature pyrolysis temperature is maintained within reaction zone A, providing a stable temperature environment for the initial and deep pyrolysis of the material. Separation zone B is mainly used to separate the material from the pyrolysis residue and to transfer incompletely pyrolyzed material from the inner layer to the outer layer, avoiding residue accumulation that affects pyrolysis efficiency.

[0092] The bottom of the pyrolysis furnace 5 is provided with a discharge port 4, which is located on a vertical central plane along with the rotation axis. This vertical central plane serves as the boundary between the reaction zone A and the separation zone B, placing the reaction zone A and the separation zone B on opposite sides of the vertical central plane, resulting in a well-organized and logically clear structural layout. To achieve precise control of material separation and transfer, both the outer scraper assembly and the inner scraper assembly are fixedly positioned in the middle of the separation zone B. This position ensures effective scraping of the reaction cage surface by the scraper assembly while providing sufficient space for the stripped material and residue to fall, preventing the scraped material from accumulating in the separation zone B and ensuring a smooth separation process.

[0093] During the process of the inner flexible reaction cage 3b and the outer flexible reaction cage 3a rotating in the same direction, the movement path of the material is precisely matched with the cavity partition and the position of the scraper assembly, forming an orderly pyrolysis-separation-repyrolysis cycle. The inner flexible reaction cage 3b carries the material into the reaction zone A, where it undergoes preliminary pyrolysis at high temperature. The material then rotates with the inner reaction cage into the middle of the separation zone B, where it comes into contact with the inner scraper assembly. The incompletely pyrolyzed portion of the material stripped by the inner scraper assembly falls onto the outer flexible reaction cage 3a under gravity, while the completely pyrolyzed residue continues to fall to the bottom of the pyrolysis furnace 5 and is discharged through the outlet 4. The incompletely pyrolyzed material falling into the outer flexible reaction cage 3a rotates in the same direction as the outer reaction cage and re-enters the reaction zone A for deep pyrolysis, fully decomposing the organic matter in the material. After deep pyrolysis, the outer reaction cage continues to carry the material into the middle of the separation zone B, where it is stripped by the outer scraper assembly. The completely pyrolyzed residue falls to the outlet 4 and is discharged. If there is still incompletely pyrolyzed material, it can re-enter the reaction zone A with the outer reaction cage for cyclic pyrolysis until complete pyrolysis.

[0094] Both the outer scraper assembly and the inner scraper assembly are equipped with flexible scrapers 7. The flexible scrapers 7 can be flat strip-shaped elastic structures. Multiple flexible scrapers 7 are vertically fixed to the circumferential wall of the pyrolysis furnace 5 or the axial extension of the inner support 9 (the axial extension can be a long arc-shaped sheet structure). The free ends of the flexible scrapers 7 on the inner surface of the circumferential wall of the sealed outer shell of the pyrolysis furnace 5 can contact the outer mesh surface of the outer flexible reaction cage 3a. The free ends of the flexible scrapers 7 on the axial extension of the inner support 9 can contact the mesh surface of the inner flexible reaction cage 3b.

[0095] The flexible wire 31 can be made of high-temperature resistant steel, molybdenum, tungsten, or nickel. The flexible scraper 7 can be made of stainless steel.

[0096] The gas outlet 8 located at the top of the pyrolysis furnace 5 can be connected to the separation and condensation system, and the discharge port 4 located at the lower end of the separation zone B of the sealed shell of the pyrolysis furnace 5 can be connected to the solid collection system.

[0097] Multiple flexible scrapers 7 are evenly distributed on the circumferential wall or axial extension of the sealed outer shell of the pyrolysis furnace 5, with a minimum interval of 10 mm between adjacent flexible scrapers 7. The flexible scrapers 7 are arranged in the middle of the separation zone B, and the central angle of the distribution area on the corresponding central axis (or the rotation axis mentioned above) ranges from 45° to 90°. The temperature of the reaction zone A is not lower than the temperature of the separation zone B.

[0098] In this application, a heat exchange flue can be arranged on the outside of the sealed shell of the pyrolysis furnace 5 to burn the solid carbon and non-condensable gases produced by pyrolysis, and then the flue gas is introduced into the heat exchange flue for self-heating of the pyrolysis device. Alternatively, an independent temperature control device (preferably an electromagnetic heating system) can be installed on the outside of the sealed shell to ensure that the raw material is continuously pyrolyzed at the optimal temperature required by the pyrolysis curve, resulting in high reaction efficiency and effectively ensuring the time required for complete pyrolysis; the temperature of reaction zone A is not lower than the temperature of separation zone B, ensuring that the lower temperature of separation zone B solidifies the incompletely pyrolyzed raw material, facilitating the peeling of the raw material from the flexible filament 31.

[0099] In this application, the gap between the flexible wires of the inner flexible reaction cage 3b is larger than the gap between the flexible wires of the outer flexible reaction cage 3a, ensuring that the incompletely pyrolyzed raw material peeled off from the inner flexible reaction cage 3b can fall onto the outer flexible reaction cage 3a, avoiding direct passage through the gap. Branches can be provided on the flexible wires 31, and the length of the branches is greater than the spacing between adjacent flexible wires 31 to accommodate raw materials with large volume changes during pyrolysis. The branches overlap the adjacent flexible wires 31 in the opposite direction of movement to reduce the resistance when the branches move relative to the flexible scraper 7. The material of the flexible wires 31 is high-temperature resistant steel, molybdenum, tungsten, or nickel.

[0100] The flexible scraper 7 can be a flat, strip-shaped elastic structure. Multiple flexible scrapers 7 are evenly distributed and vertically fixed to the circumferential wall of the sealed shell or the recessed side of the axial extension. The free end of the flexible scraper 7 on the inner surface of the circumferential wall of the sealed shell can contact the outer mesh surface, and the free end of the flexible scraper 7 on the axial extension can contact the inner mesh surface. The axial extension is arranged between the outer and inner flexible reaction cages 3b. The spacing between adjacent flexible scrapers 7 is at least 10 mm. All flexible scrapers 7 are arranged in the middle of the separation zone B, and the central angle on the corresponding central axis (such as the rotation axis mentioned above) of the distribution area is in the range of 45~90°. The material of the flexible scraper 7 can be stainless steel. This design allows the flexible scraper 7 to fully contact the flexible wire 31, facilitating the scraping and removal of the adhesive residue remaining on the mesh surface of the flexible reaction cage.

[0101] The built-in double-layer flexible rotary pyrolysis device provided in this application can perform continuous two-stage efficient pyrolysis of large-sized strip-shaped organic waste in a confined space. The core components are the outer and inner flexible reaction cages 3b and the flexible scraper 7. The sealed outer shell of the pyrolysis furnace 5 is divided into a reaction zone A and a separation zone B. The outer or inner flexible reaction cage 3b is fixed to a pair of corresponding active and driven end plates via fins 32. The first driving component 2 and the second driving component 6 drive the outer and inner flexible reaction cages 3b to rotate in the same direction, moving from the bottom to the top within reaction zone A. Flexible wires 31 are connected between the fins 32 on both ends of the outer and inner flexible reaction cages 3b, forming the mesh surfaces of the outer and inner layers respectively. After the strip-shaped waste enters the sealed outer shell and falls onto the inner flexible reaction cage 3b, it softens as the temperature rises, wraps around and adheres to the flexible wires 31, and pyrolysis begins simultaneously. The raw material is carried from bottom to top through reaction zone A and into separation zone B by cage 3b. In the middle of separation zone B, the flexible scraper 7 intermittently collides with the inner flexible filaments 31, generating elastic high-frequency vibration. This vibration and scraping action peels off the incompletely pyrolyzed raw material while simultaneously crushing the residual coke and waste residue. The incompletely pyrolyzed raw material falls onto the outer flexible reaction cage 3a and, driven by the outer flexible reaction cage 3a, passes through reaction zone A a second time from the bottom of separation zone B and enters separation zone B again until pyrolysis is complete. After entering separation zone B for the second time, the flexible scraper 7 intermittently collides with the outer flexible filaments 31, peeling off the residual coke and waste residue, and automatically discharges the material through gravity. Due to the adoption of the above technical solution, this invention has the following effects:

[0102] 1. Stable operation of the device: The strip-shaped waste material used as raw material undergoes pyrolysis on the flexible reaction cage. The raw material softens when heated and can spontaneously adhere and fix itself to the flexible wire 31. At the same time, it ensures that the contact area between the raw material and the flexible wire 31 is small, so that the pyrolysis residue can easily detach spontaneously under the intermittent collision action of the flexible scraper 7, effectively preventing the flexible reaction cage from clogging and ensuring that the device can operate continuously. The active end plate of the outer or inner layer can drive the corresponding driven end plate to rotate through the support rod 33, so that the coaxial outer and inner flexible reaction cages 3b can be independently controlled to rotate without interfering with each other, and the operation is stable.

[0103] 2. High heat transfer efficiency and high pyrolysis efficiency: The outer and inner flexible reaction cages 3b are both located inside the sealed shell and are close to each other, which reduces heat dissipation and makes the temperature of the outer flexible reaction cage 3a higher than that of the inner flexible reaction cage 3b, ensuring that the raw materials continue to pyrolyze at the optimal temperature required by the pyrolysis curve with increasing temperature, resulting in high reaction efficiency. In addition, the flexible scraper 7 can effectively scrape off the coke and pyrolysis residues adhering to the surface of the flexible reaction cage during the pyrolysis process, which is conducive to heat transfer and improves pyrolysis efficiency.

[0104] 3. Effective control of reaction time: The raw materials are mainly bonded to the elastic flexible wires 31. When the outer and inner flexible wires 31 move to the middle of the separation zone B, they are subjected to intermittent collisions by the flexible scraper 7 and vibrate violently. This can peel off the raw materials that are not fully pyrolyzed or the coke and waste residues that are left over from pyrolysis that are bonded to the flexible wires 31. At the same time, the inner and outer flexible reaction cages 3a can be independently controlled in terms of speed, which can effectively control the first and second pyrolysis time.

[0105] 4. Convenient reaction control and wide adaptability of raw materials: Depending on the characteristics of the raw materials and the type of target product, flexible wires 31 with different gaps and connection methods and flexible scrapers 7 with different sizes and layouts can be replaced. At the same time, the feeding speed, rotation speed of the second drive unit 6 and the first drive unit 2, pyrolysis temperature and other parameters of the device can be flexibly controlled to adjust the pyrolysis reaction process, so as to achieve efficient pyrolysis process of different raw materials in a targeted manner.

[0106] 5. Convenient discharge and automatic slag removal: The incompletely pyrolyzed raw material located on the inner flexible reaction cage 3b can automatically fall into the outer flexible reaction cage 3a under the action of the flexible scraper 7 and gravity to continue pyrolysis. At the same time, the lower temperature of the separation zone B can also solidify the incompletely pyrolyzed raw material, making it easy to peel off from the flexible wire 31. The flexible scraper 7 is arranged in the middle of the separation zone B, so that the remaining coke and slag after pyrolysis can fall smoothly without obstruction and be automatically discharged from the discharge port 4 under the action of gravity.

[0107] 6. Simple structure and easy maintenance: No complex rotating components are required. The flexible scraper 7 is an elastic flat strip structure. The wing rod 32 is connected to the two end plates. The outer edge of the wing rod 32 is connected to each other by flexible wires 31. The rotating components are easy to replace and the device is easy to maintain. By adjusting the connection method of the flexible wires 31, the gap of the mesh surface of the inner flexible reaction cage 3b is made larger than the gap of the mesh surface of the outer flexible reaction cage 3a. This ensures that the unpyrolyzed raw materials peeled off from the inner flexible reaction cage 3b can fall onto the outer flexible reaction cage 3a, avoiding them from passing directly through the gap. The device structure is simple.

[0108] 7. Compact device with high space utilization: Large strip-shaped raw materials can be directly fed into the pyrolysis device for pyrolysis without being crushed into particles, which can save additional pretreatment, stirring, decoking and other equipment. At the same time, the outer and inner flexible reaction cages 3b of the core device are arranged coaxially in the same pyrolysis furnace 5 in a nested manner, making the device compact and improving the overall space utilization.

[0109] 8. Effective dechlorination and clean emissions: Pyrolysis is an anaerobic process that produces reducing components such as H2 and CO. Moreover, the temperature is relatively low, which can effectively inhibit the formation of harmful substances such as dioxins from the source and achieve efficient dechlorination.

[0110] This application also provides a pyrolysis method with a built-in double-layer flexible rotary pyrolysis device, including:

[0111] Step S1: The driving mechanism drives the inner flexible reaction cage 3b and the outer flexible reaction cage 3a to rotate in the same direction, while heating the pyrolysis furnace 5 to the set temperature.

[0112] In this step, the first driving component 2 and the second driving component 6 are driven to rotate, so as to drive the outer and inner flexible reaction cages 3b to rotate at a set speed, while heating the inside of the pyrolysis furnace 5 to a set temperature.

[0113] Step S2: The raw material is fed into the inner flexible reaction cage 3b through the feed cylinder 1. As the temperature rises, the material softens and adheres to the inner flexible reaction cage 3b and undergoes pyrolysis.

[0114] In this step, the raw material is fed into the inner flexible reaction cage 3b through the feed cylinder 1 and falls onto the flexible filament 31 at the bottom of the inner flexible reaction cage 3b. As the temperature rises, the raw material softens and adheres to the flexible filament 31 and undergoes pyrolysis.

[0115] Step S3: The inner flexible reaction cage 3b rotates, driving the material from the reaction zone A into the separation zone B, and in the separation zone B, the material is peeled off by the inner scraper assembly. At least part of the peeled material falls onto the outer flexible reaction cage 3a and rotates with the outer flexible reaction cage 3a.

[0116] The inner flexible reaction cage 3b rotates continuously under the drive of the second drive component 6, causing the raw material located at the beginning of the inner layer of reaction zone A to move to the end of the inner layer of reaction zone A with the inner flexible reaction cage 3b and enter the separation zone B. The degree of pyrolysis gradually increases and hot steam is generated. In the middle of the separation zone B, the flexible scraper 7 located on the inner scraper assembly intermittently collides with the flexible wire 31 of the inner flexible reaction cage 3b, peeling off the raw material that is not completely pyrolyzed and adheres to the inner surface of the inner flexible reaction cage 3b, while breaking up the coke and waste residue remaining from pyrolysis.

[0117] Step S4: The outer flexible reaction cage 3a rotates, driving the material from the reaction zone A into the separation zone B, and the material is peeled off in the separation zone B by the outer scraper assembly.

[0118] The incompletely pyrolyzed raw material detached from the inner flexible reaction cage 3b falls onto the outer flexible reaction cage 3a. Driven by the first driving component 2, the outer flexible reaction cage 3a continuously rotates, causing the incompletely pyrolyzed raw material at the end of the outer layer of separation zone B to pass through the entire reaction zone A and enter the beginning of the outer layer of separation zone B, continuing to generate pyrolysis steam until it is completely pyrolyzed into coke and waste residue. In the middle of the outer layer of separation zone B, the flexible scraper 7 located on the inner wall of the pyrolysis furnace 5 intermittently collides with the flexible wires 31 of the outer flexible reaction cage 3a, peeling off the coke and waste residue remaining on the outer flexible reaction cage 3a. The coke and waste residue fragments detached from the outer and inner layers of separation zone B pass through the flexible reaction cage under gravity and are automatically discharged from the discharge port 4 below, collected by the solid collection system. The generated pyrolysis steam is discharged through the gas outlet 8, and after condensation and separation, liquid products and non-condensable gases are collected.

[0119] In order to improve the pyrolysis efficiency of the raw materials, the temperature of the pyrolysis furnace 5 is set to 300~800℃, and the rotation speed of the flexible reaction cage is set to 1~20r / min. This ensures that the temperature and reaction time of the pyrolysis process are as close as possible to the optimal pyrolysis environment of the specific strip-shaped raw materials, thereby improving the pyrolysis conversion rate of the raw materials and the yield of the target product.

[0120] The technical solution of the present invention will be further described below based on the preferred embodiment. Specifically, the radius of the sealed outer shell of the pyrolysis furnace 5 can be 1000 mm and the length is 1400 mm; the diameter of the feed cylinder 1 is 300 mm, the diameter of the first driving member 2 is 500 mm, the diameter of the second driving member 6 is 150 mm, the length of the outer flexible reaction cage 3a is 1200 mm, the radius R of the outer main end plate 34 and the outer slave end plate 35 is 500 mm, and 60 fins 32 are evenly arranged on the outer edges of the outer main end plate 34 and the outer slave end plate 35; the length of the inner flexible reaction cage 3b is 1000 mm, the radius r of the inner main end plate 36 and the inner slave end plate is 300 mm, and 30 fins 32 are evenly arranged on the outer edges of the inner main end plate 36 and the inner slave end plate 37. The diameter of the fin 32 is 10 mm and the length is 100 mm. The flexible wire 31 is made of stainless steel wire, and in this embodiment, stainless steel wire is used. Figure 4 The connection can be made in various ways, but is not limited to this material and connection method. The flexible scraper 7 is a flat, strip-shaped, elastic thin stainless steel sheet, 60mm in length, 10mm in width, and 0.2mm in thickness; in this embodiment, it is used... Figure 2 and Figure 3 The internal support 9 can be configured in this manner, but is not limited to this method; see reference Figure 3 Multiple flexible scrapers 7 are distributed in the separation zone B on the inner surface of the sealed shell and the axial extension (which is an arc-shaped plate) at 30° to both sides of the horizontal symmetrical plane, which corresponds to a central angle of 60°. 120 scrapers can be evenly arranged on the sealed shell and 60 scrapers can be evenly arranged on the axial extension of the inner support 9.

[0121] The following specific embodiments verify the pyrolysis apparatus and pyrolysis method of this application:

[0122] Example 1

[0123] Waste paper strips with an average length of 300 mm were fed into a sealed enclosure. The temperature of both reaction zone A and separation zone B was set to 450℃, and the rotation speed of the first drive component 2 and the second drive component 6 was 4 r / min. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed, with a liquid phase yield of 45.3%, of which the target product, L-glucanone, accounted for 10.9 wt%, achieving efficient disposal and utilization of waste paper strips. Simultaneously, after the outer and inner flexible reaction cages 3b rotated once each, the waste paper strips were completely pyrolyzed, and the resulting residue was almost entirely scraped off, effectively preventing the adhesion, clogging, and coking of raw materials.

[0124] Example 2

[0125] Waste denim processing material with an average length of 200mm is fed into a sealed enclosure. The temperature of reaction zone A is set to 700℃, and the temperature of separation zone B is set to 500℃. The rotation speed of the first drive component 2 is 4r / min, and the rotation speed of the second drive component 6 is 2r / min. After one round of pyrolysis, the pyrolysis gas is collected and rapidly separated and condensed, with 44.4% of the non-condensable gas collected, achieving efficient disposal and utilization of the waste denim processing material. Simultaneously, after the outer and inner flexible reaction cages 3b rotate once each, the waste denim processing material is completely pyrolyzed, and the resulting residue is basically scraped off, effectively preventing the problems of raw material adhesion, blockage, coking, and slagging.

[0126] Example 3

[0127] PET waste plastic wires with an average length of 200mm were fed into a sealed enclosure. The temperature of reaction zone A was set to 500℃, and the temperature of separation zone B was set to 400℃. The rotation speed of the first drive component 2 was 5r / min, and the rotation speed of the second drive component 6 was 10r / min. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed, with a liquid phase yield of 35.4%, of which the yield of the target product benzoic acid reached 28.4wt%, achieving efficient disposal and utilization of the waste plastic wires. Simultaneously, after the outer and inner flexible reaction cages 3b rotated once each, the waste plastic wires were completely pyrolyzed, and the resulting residue was basically scraped off, effectively preventing the problems of raw material adhesion, blockage, coking, and slagging.

[0128] Example 4

[0129] Waste tire strips with an average length of 300 mm were fed into a sealed enclosure. The temperature of reaction zone A was set to 600℃, and the temperature of separation zone B was set to 450℃. The rotation speeds of the first drive component 2 and the second drive component 6 were both 8 r / min. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed, with a liquid phase yield of 39.5%, of which the target aromatic product accounted for 16.8 wt%, achieving efficient disposal and utilization of waste tire strips. Simultaneously, after the outer and inner flexible reaction cages 3b rotated once each, the waste tire strips were completely pyrolyzed, and the resulting residue was basically scraped off, effectively preventing the problems of raw material adhesion, blockage, coking, and slagging.

[0130] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A built-in double-layer flexible rotary pyrolysis device, characterized in that, include: A pyrolysis furnace having a cavity; An inner flexible reaction cage is located inside the cavity and is rotatably mounted on the pyrolysis furnace. An outer flexible reaction cage is located inside the cavity and sleeved on the outside of the inner flexible reaction cage. The outer flexible reaction cage is rotatably mounted on the pyrolysis furnace, and the rotation axes of the outer flexible reaction cage and the inner flexible reaction cage are collinear. Both the outer scraper assembly and the inner scraper assembly are disposed within the cavity. The outer scraper assembly is in contact with the outer flexible reaction cage, and the inner scraper assembly is in contact with the inner flexible reaction cage. A feed cylinder, one end of which extends into the pyrolysis furnace and into the inner flexible reaction cage; A driving mechanism is provided, which is in transmission cooperation with the outer flexible reaction cage and the inner flexible reaction cage respectively, to drive the inner flexible reaction cage and the outer flexible reaction cage to rotate in the same direction.

2. The built-in double-layer flexible rotary pyrolysis device according to claim 1, characterized in that, The driving mechanism includes a first driving component and a second driving component; The first driving member and the second driving member are respectively disposed on both sides of the pyrolysis furnace along the rotation axis; The first driving member is connected to the outer flexible reaction cage to drive the outer flexible reaction cage to rotate; The second driving component is connected to the inner flexible reaction cage to drive the inner flexible reaction cage to rotate.

3. The built-in double-layer flexible rotary pyrolysis device according to claim 2, characterized in that, The outer flexible reaction cage includes an outer main end plate, an outer slave end plate, and outer flexible wires. Each of the outer flexible wires is arranged sequentially around the outer main end plate in the circumferential direction, and the two ends of the outer flexible wires are respectively connected to the outer main end plate and the outer slave end plate. The first driving member is rotatably disposed on the pyrolysis furnace and connected to the outer main end plate.

4. The built-in double-layer flexible rotary pyrolysis device according to claim 3, characterized in that, The outer main end plate is rotatably sleeved on the feed cylinder; The first driving component is a cylinder, which is rotatably sleeved on the outside of the feed cylinder. The first driving component is rotatably disposed on the pyrolysis furnace and connected to the outer main end plate.

5. The built-in double-layer flexible rotary pyrolysis device according to claim 4, characterized in that, The inner flexible reaction cage includes an inner main end plate, an inner secondary end plate, and inner flexible wires. Each inner flexible wire is arranged sequentially around the inner main end plate in the circumferential direction, and the two ends of each inner flexible wire are respectively connected to the inner main end plate and the inner secondary end plate. The inner main end plate and the inner slave end plate are located between the outer main end plate and the outer slave end plate, and the outer main end plate and the inner main end plate are located on opposite sides of the pyrolysis furnace; The second driving member is rotatably disposed in the pyrolysis furnace and passes through the outer slave end plate and is connected to the inner main end plate.

6. The built-in double-layer flexible rotary pyrolysis device according to claim 5, characterized in that, The second drive component is equipped with bearings between the pyrolysis furnace and the outer end plate, respectively; Bearings are respectively provided between the feed cylinder and the inner slave end plate, the outer main end plate and the first driving member; A bearing is provided between the first driving component and the pyrolysis furnace.

7. The built-in double-layer flexible rotary pyrolysis device according to claim 1, characterized in that, The outer scraper assembly is disposed on the inner wall of the pyrolysis furnace, and the outer scraper assembly is in contact with the outer flexible reaction cage; An annular cavity is formed between the inner flexible reaction cage and the outer flexible reaction cage; The inner scraper assembly is located inside the annular cavity and is in contact with the inner flexible reaction cage.

8. The built-in double-layer flexible rotary pyrolysis device according to claim 1, characterized in that, The inner scraper assembly includes an inner support and multiple flexible scrapers; The inner support includes a radial extension and an axial extension; The feed cylinder extends along the rotation axis, the radial extension is perpendicularly connected to the feed cylinder, the axial extension is perpendicularly connected to the radial extension, and the axial extension extends along the rotation axis; Each of the flexible scrapers is connected to the axial extension, and the flexible scraper is in contact with the inner flexible reaction cage.

9. The built-in double-layer flexible rotary pyrolysis device according to claim 1, characterized in that, The cavity is provided with a reaction zone and a separation zone arranged circumferentially along the axis of rotation. The axis of rotation is located on a vertical center plane, and the vertical center plane is perpendicular to the horizontal plane; The reaction zone and the separation zone are located on opposite sides of the vertical center plane; The bottom of the pyrolysis furnace is provided with a discharge port, which is located on the side of the separation zone near the vertical center plane; Both the outer scraper assembly and the inner scraper assembly are located in the middle of the separation zone; During the process of the inner flexible reaction cage and the outer flexible reaction cage rotating in the same direction, some of the material that is peeled off by the inner scraper assembly on the inner flexible reaction cage falls onto the outer flexible reaction cage, and under the drive of the outer flexible reaction cage, passes through the reaction zone and the separation zone in sequence and is peeled off by the outer scraper assembly.

10. The pyrolysis method of the built-in double-layer flexible rotary pyrolysis device as described in any one of claims 1-9, characterized in that, include: Step S1: The driving mechanism drives the inner flexible reaction cage and the outer flexible reaction cage to rotate in the same direction, while heating the pyrolysis furnace to the set temperature. Step S2: The raw material is fed into the inner flexible reaction cage through the feed cylinder. As the temperature rises, the material softens and adheres to the inner flexible reaction cage and undergoes pyrolysis. Step S3: The inner flexible reaction cage rotates, driving the material from the reaction zone into the separation zone. In the separation zone, the material is peeled off by the inner scraper assembly. At least part of the peeled material falls onto the outer flexible reaction cage and rotates with it. Step S4: The outer flexible reaction cage rotates, driving the material from the reaction zone into the separation zone, and the material is peeled off in the separation zone by the outer scraper assembly.

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