Chain thermal decomposition apparatus with transversely flexible filaments and thermal decomposition method

Abstract

The application provides a chain pyrolysis device with transverse flexible wires and a pyrolysis method, relates to the technical field of pyrolysis, and comprises a closed shell, a chain transmission mechanism, a flexible reaction net, a plurality of flexible scrapers and a baffle; the chain transmission mechanism comprises a pair of parallel horizontally placed flat annular plate chains and driving and supporting components thereof, is divided into a reaction zone, a separation zone and a driving zone; the flexible reaction net comprises a plurality of pairs of fin rods which are arranged at intervals on the two plate chains and a plurality of parallel flexible wires which are connected to the fin rods on the two sides respectively; one end of the flexible scraper is fixed to the inner surface of the closed shell above the separation zone and the other end can contact the flexible reaction net. The application can directly and efficiently pyrolyze large-size strip-shaped organic waste, so as to solve the technical problems that the existing pyrolysis device is prone to softening, caking and blocking of raw materials, serious coking and slagging and high pretreatment cost when processing strip-shaped organic waste.

Description

Technical Field

[0001] This invention relates to the field of pyrolysis technology, and in particular to a chain pyrolysis apparatus and pyrolysis method with transverse flexible filaments. Background Technology

[0002] Organic waste materials such as paper, tires, and fibers need to be processed into strips in some industrial and agricultural production processes. Textiles, rubber products, and plastic products also require cutting and trimming before molding, generating strip-shaped waste. If these strip-shaped wastes are carelessly discarded or landfilled, they not only pollute the environment but also result in a significant waste of resources.

[0003] Pyrolysis is a highly efficient method for treating organic strip-shaped waste. Compared with traditional methods, it offers advantages such as shorter processing cycles, higher conversion efficiency, significant volume reduction, efficient solidification of heavy metals, and avoidance of the formation of harmful substances like dioxins. It also yields high-value solid-liquid-gas byproducts. However, existing pyrolysis equipment has several shortcomings when processing strip-shaped raw materials. For example, organic raw materials soften and clump together easily when heated. Furthermore, the large size of the strips inevitably leads to blockages within the pyrolysis unit, causing severe coking and slagging problems, hindering heat transfer, and preventing the unit from operating stably for extended periods. If additional crushing pretreatment measures are used to pulverize the strip-shaped raw materials, it significantly increases the power consumption of the reaction unit, greatly raising processing costs and resulting in a bulky equipment.

[0004] Therefore, there is an urgent need to design new pyrolysis reaction devices that can ensure that strip-shaped waste materials can be directly fed into the pyrolysis reaction chamber for efficient pyrolysis without crushing and pretreatment, while also promptly cleaning up adhering coke and pyrolysis residues to prevent device blockage and maintain the stable operation of the pyrolysis process. Summary of the Invention

[0005] The purpose of this invention is to provide a chain pyrolysis device and pyrolysis method with transverse flexible filaments, which can solve the technical problems of existing pyrolysis devices in the treatment of strip-shaped organic waste, such as easy softening, adhesion and blockage of raw materials, serious coking and slagging, and high pretreatment costs.

[0006] This invention provides a chain pyrolysis apparatus with transverse flexible filaments, comprising: A sealed outer shell, wherein the sealed outer shell is a sealed hollow box structure, with a feed inlet and an air outlet at the top and a discharge outlet at the bottom; A chain drive mechanism is arranged inside the sealed housing. The chain drive mechanism includes at least one pair of annular flat chains, and a drive wheel and a driven wheel for pulling the flat chains. The flexible reaction net includes multiple pairs of wing rods spaced apart on the flat chain, and multiple parallel flexible wires connecting the pairs of wing rods on both sides, with all the flexible wires together forming a mesh-like bearing surface. A flexible scraper, which is an elastic structure and located above the chain drive mechanism, has one end fixed to the inner surface of the sealed shell and the other end capable of contacting the flexible filament.

[0007] Furthermore, the chain drive mechanism is divided into a reaction zone, a separation zone, and a drive zone in sequence along the direction of motion; A driven shaft is arranged upstream of the reaction zone in the direction of movement, and driven wheels are fixed at both ends of the driven shaft to rotate with the two flat chains respectively; a heating shaft is arranged downstream of the driven shaft in the reaction zone, and support wheels are installed at both ends of the heating shaft to support the flat chains on both sides respectively. A fixed shaft is arranged in the separation zone, and a support wheel is installed on the fixed shaft to support the flat chain; A drive shaft is arranged in the drive area, and drive wheels are fixed at both ends of the drive shaft to pull the two flat chains to rotate.

[0008] Furthermore, the heating shaft is a hollow pipe through which a heating medium flows, the heating medium including high-temperature flue gas or molten salt.

[0009] Furthermore, the driven shaft and the driving shaft respectively pass through and rotate on the end face of the sealed housing; One end of the drive shaft, which passes through the sealed housing, is connected to the drive system. A tensioning mechanism for straightening the flat chain is connected to the driven shaft.

[0010] Furthermore, the feed inlet is located on the top of the sealed shell above the upstream end of the reaction zone, the feed inlet is connected to the feeding system, and the width of the feed inlet is smaller than the width of the reaction zone; The discharge port is located at the bottom of the sealed shell below the separation zone, the discharge port is connected to the solid collection system, and the width of the discharge port is greater than the width of the separation zone; The gas outlet is located on the top of the sealed outer shell above the downstream end of the reaction zone, and the gas outlet is connected to the separation and condensation system.

[0011] Furthermore, there are multiple flexible scrapers, which are flat, strip-shaped elastic structures and are arranged at intervals above the separation zone.

[0012] Furthermore, the flexible filament has branches, and the length of the branches is greater than the spacing between adjacent flexible filaments; the branches overlap the adjacent flexible filaments in the opposite direction of the movement direction.

[0013] Furthermore, the sealed outer shell is also provided with baffles, and at least one pair of the baffles are respectively disposed on both sides of the flexible reaction net and arranged parallel to and close to the wing; The baffle is located above the flat chain, and the width of the baffle is smaller than the gap between the flat chain and the top of the sealed shell; The baffle is fixed to the inner wall of the sealed outer shell.

[0014] Furthermore, two links at opposite positions on a pair of flat chains are connected by thin rods.

[0015] This invention also provides a pyrolysis method, implemented based on the aforementioned chain pyrolysis device with transverse flexible filaments, the pyrolysis method comprising the following steps: S1. Drive the drive shaft and drive wheel to rotate, causing a pair of flat chains and flexible reaction net to move together at a set speed, while heating multiple heating shafts to their respective set temperatures; S2. The raw material enters the sealed shell through the feed port and falls on the flexible reaction net located at the upstream end of the reaction zone of the chain drive mechanism. Under the heating action of the heating shaft, the temperature gradually rises, the raw material softens and sticks to the flexible wire and undergoes pyrolysis. S3. The flexible reaction net continues to move along the ring under the drive of the flat chain, so that the raw material located at the upstream end of the reaction zone of the chain transmission mechanism moves with the flexible reaction net to the downstream end of the reaction zone and enters the separation zone, and the degree of pyrolysis gradually increases, generating pyrolysis gas. S4. Inside the separation zone of the chain drive mechanism, the flexible scraper and the flexible wires of the flexible reaction net collide intermittently, generating elastic high-frequency vibration. Through the intermittent vibration of the flexible wires and the scraping action of the flexible scraper, the coke and slag remaining on the flexible reaction net are peeled off and automatically discharged from the outlet under the action of gravity, and collected by the solid collection system. S5. The generated pyrolysis gas is discharged through the gas outlet, and after condensation and separation, the liquid products and non-condensable gases are collected.

[0016] The beneficial effects of the technical solution of this invention are as follows: This invention provides a chain pyrolysis device with transverse flexible filaments, capable of directly and efficiently pyrolyzing large-sized strip-shaped organic waste. The core component comprises a pair of flat chains, a flexible reaction net, and a flexible scraper. The flexible reaction net is fixed to the pair of flat chains by fins, driving a drive shaft and drive wheel to rotate, causing the flat chains and the flexible reaction net to move in a circular motion at a set speed. Parallel flexible filaments are connected between the fins of the flexible reaction net, with the direction of the filaments perpendicular to the direction of motion. After the strip-shaped waste enters the sealed shell and falls onto the flexible reaction net, it softens as the temperature rises, wrapping around and adhering to the flexible filaments while simultaneously initiating pyrolysis. Driven by the flat chains, the flexible reaction net moves the waste from the beginning to the end of the reaction zone and into the separation zone. In the separation zone, the flexible scraper intermittently collides with the parallel flexible filaments, generating elastic high-frequency vibrations. These vibrations and scraping action remove residual coke and slag from the surface of the flexible reaction net, and automatic discharge is achieved through gravity. Due to the adoption of the above technical solution, this invention has the following advantages: 1. Stable operation of the equipment: The strip-shaped waste material used as raw material undergoes pyrolysis reaction on the flexible reaction net. The raw material softens when heated and can spontaneously adhere and fix itself on the flexible wire. At the same time, it ensures that the contact area between the raw material and the flexible wire is small, so that the pyrolysis residue can easily detach spontaneously under the intermittent collision action of the flexible scraper. The baffle prevents the raw material from falling into the reaction zone and sticking to the inner surface of the sealed shell, effectively preventing the blockage of the sealed shell and the chain drive mechanism, and ensuring that the equipment can operate smoothly and continuously.

[0017] 2. High heat transfer efficiency and high pyrolysis efficiency: The flexible reaction mesh and heating shaft are located inside the sealed shell and are close to each other, which reduces heat dissipation. At the same time, each heating shaft can be independently temperature controlled to ensure that the raw materials continue to pyrolyze at the optimal temperature required by the pyrolysis curve, resulting in high reaction efficiency.

[0018] 3. Effective control of reaction time: Because the raw materials mainly come into contact with the elastic flexible filaments, the violent vibrations caused by the flexible filaments moving to the separation zone hitting the flexible scraper are difficult to be transmitted to the flexible filaments located in the reaction zone, thus avoiding the accidental fall of unreacted raw materials. At the same time, the size of the reaction zone is easy to adjust, ensuring an effective reaction time.

[0019] 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 reaction nets with different gaps and connection methods, as well as flexible scrapers with different sizes and layouts, can be replaced. At the same time, the feed rate, drive shaft speed, pyrolysis temperature and other parameters of the device can be flexibly controlled to adjust the pyrolysis reaction process, so as to achieve efficient pyrolysis of different raw materials in a targeted manner.

[0020] 5. Automatic slag discharge: The fixed shaft is divided into two coaxial sections, and an independent drive area is set at the end of the chain drive mechanism to ensure that there is no shaft obstruction below the separation zone. The coke and slag remaining after pyrolysis will be automatically discharged from the discharge port under the action of flexible scrapers and gravity.

[0021] 6. Simple structure and easy maintenance: No complex rotating components are required. The core of the chain drive mechanism is a common chain plate conveyor belt. The flexible scraper is an elastic flat strip structure. The wing rods are connected to the flat chain. The outer edges of the wing rods are connected to each other by flexible wires, which makes it easy to replace and maintain the device.

[0022] 7. Compact device with high space utilization: Large-sized strip-shaped raw materials can be directly fed into the pyrolysis device for pyrolysis without being crushed into particles, which can save the need for additional pretreatment, stirring, decoking and other equipment. At the same time, the core of the device is only a chain drive mechanism, which makes the device compact, improves the overall space utilization, and makes it easy to expand the processing scale of the device by extending the reaction zone.

[0023] 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. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the chain pyrolysis device with transverse flexible wires of the present invention. Figure 2 for Figure 1 A top-view structural diagram; Figure 3 This is a schematic diagram of a flexible wire connection method with branches.

[0026] Explanation of reference numerals in the attached figures: 1: Sealed outer shell; 11: Inlet; 12: Outlet; 13: Vent; 2: Chain drive mechanism; 21: Driven shaft; 22: Driven wheel; 23: Heating shaft; 24: Support wheel; 25: Fixed shaft; 26: Drive shaft; 27: Drive wheel; 28: Flat chain; 3: Flexible reactive mesh; 31: Wings; 32: Flexible filaments; 4: Flexible scraper; 5: Baffle; A: Reaction zone; B: Separation zone; C: Driving zone. Detailed Implementation

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0030] See Figures 1 to 2 The present invention provides a chain pyrolysis device with transverse flexible wires, which includes a sealed shell 1, a chain transmission mechanism 2, a flexible reaction net 3, multiple flexible scrapers 4 and a pair of baffles 5.

[0031] The sealed outer shell 1 is a sealed hollow box structure that encloses all the chain drive mechanism 2, flexible reaction net 3, flexible scraper 4 and baffle 5; the sealed outer shell 1 has a feed inlet 11, a discharge outlet 12 and an air outlet 13.

[0032] The chain drive mechanism 2 includes a pair of parallel, horizontally placed flat annular flat chains 28, a drive wheel 27, a driven wheel 22 and a support wheel 24 for supporting or pulling the flat chains 28, and a driven shaft 21, a heating shaft 23, a fixed shaft 25 and a drive shaft 26 for mounting the drive wheel 27, the driven wheel 22 or the support wheel 24.

[0033] The chain drive mechanism 2 is divided into three sequentially connected zones: reaction zone A, separation zone B, and drive zone C, from the beginning (upstream) to the end (downstream). At the beginning (upstream) end of the reaction zone A of the chain drive mechanism 2, there is a driven shaft 21. Two driven wheels 22 are fixed on both sides of the driven shaft 21, which rotate with the two flat chains 28 respectively and limit the movement position of the flat chains 28. At other positions in the reaction zone A, there are multiple heating shafts 23, and two support wheels 24 are installed on both sides of the axial direction of each heating shaft 23.

[0034] The separation zone B of the chain drive mechanism 2 is provided with one or more pairs of fixed shafts 25. Each pair of fixed shafts 25 is coaxially arranged and located on both sides of the axial direction. Each fixed shaft 25 is equipped with a support wheel 24. The pair of support wheels 24 located at corresponding positions on both sides support two flat chains 28 respectively. The support wheels 24 are connected to the heating shaft 23 or the fixed shaft 25 through bearings and can rotate freely. The difference between the distance between the two flat chains 28 and the axial distance between each pair of fixed shafts 25 does not exceed 50 mm.

[0035] The drive area C of the chain drive mechanism 2 is provided with a drive shaft 26. Two drive wheels 27 are fixed on both sides of the drive shaft 26, which drive two flat chains 28 to rotate respectively. Above the chain drive mechanism 2, the running direction of the flat chains 28 is from the first end (upstream end) to the last end (downstream end).

[0036] The two or a pair of flat chains 28 of the chain drive mechanism 2 are respectively close to one end face of the sealed shell 1. The two links of the two flat chains 28 at opposite positions can be connected by thin rods to enhance the synchronous movement of the two flat chains 28. In the chain drive mechanism 2, all driven shafts 21, heating shafts 23, fixed shafts 25, and drive shafts 26 are arranged in parallel on a plane; all drive wheels 27, driven wheels 22, and support wheels 24 have the same outer diameter, and the flat chain 28 surrounds the annular area formed by the outer surfaces of all drive wheels 27, driven wheels 22, and support wheels 24.

[0037] The driven shaft 21, fixed shaft 25, and drive shaft 26 of the chain drive mechanism 2 are solid shafts, while the heating shaft 23 is a hollow pipe through which high-temperature flue gas or molten salt flows. Both the driven shaft 21 and drive shaft 26 pass through the opposite end faces of the sealed housing 1 and are supported by bearings within the sealed housing 1. The drive shaft 26 passes through one end face of the sealed housing 1 and is connected to the drive system, which drives the drive shaft 26 and drive wheel 27 to rotate, further driving the flat chain 28. The driven shaft 21 is equipped with a matching tensioning mechanism to straighten the flat chain 28. The heating shaft 23 passes through the opposite end faces of the sealed housing 1 and is fixed to the sealed housing 1. Each pair of fixed shafts 25 passes through two opposite end faces of the sealed housing 1 and is fixed to the sealed housing 1. The gap between the drive wheel 27, driven wheel 22, support wheel 24, and flat chain 28 and the inner surface of the sealed housing 1 is greater than 10 mm.

[0038] The feed inlet 11 is located on the top of the sealed shell 1 above the first end (upstream end) of the reaction zone A of the chain drive mechanism 2. The feed inlet 11 is connected to the feeding system, and the width of the feed inlet 11 is smaller than the width of the reaction zone A of the chain drive mechanism 2. The discharge outlet 12 is located on the bottom of the sealed shell 1 below the separation zone B of the chain drive mechanism 2. The discharge outlet 12 is connected to the solid collection system, and the width of the discharge outlet 12 is larger than the width of the separation zone B of the chain drive mechanism 2. The air outlet 13 is located on the top of the sealed shell 1 above the last end (downstream end) of the reaction zone A of the chain drive mechanism 2. The air outlet 13 is connected to the separation and condensation system.

[0039] See Figures 2 to 3 The flexible reactive mesh 3 includes multiple pairs of wing rods 31 spaced apart on two flat chains 28 and extending in a vertical outward direction, and multiple flexible wires 32 respectively connected to the free ends of the same pair of wing rods 31 on the two flat chains 28; each pair of wing rods 31 is connected to only one flexible wire 32; all wing rods 31 are of the same length; branches can be set on the flexible wires 32, and the length of the branches is greater than the distance between adjacent flexible wires 32; the branches overlap the adjacent flexible wires 32 in the opposite direction of the movement direction; all flexible wires 32 and branches together form a mesh surface; the material of the flexible wires 32 is high-temperature resistant steel, molybdenum, tungsten or nickel; the length of the wing rods 31 can be 0~100 mm (when the length of the wing rod 31 is 0 mm, the flexible wire 32 is directly connected to the same plane as the flat chain 28).

[0040] All flexible scrapers 4 are flat, strip-shaped elastic structures arranged at intervals above the separation zone B of the chain drive mechanism 2; one end of the flexible scraper 4 is fixed to the inner surface of the sealed housing 1, and the other end can contact the mesh surface; at the top of the sealed housing 1, the interval between adjacent flexible scrapers 4 is at least 10 mm; the gap between the free end of the wing 31 and the inner surface of the top of the sealed housing 1 is 20~100 mm, and the length of the flexible scraper 4 is 5~10 mm longer than the gap; the flexible scraper 4 is made of steel sheet. This design allows the flexible scraper 4 to fully contact the flexible wire 32, facilitating the scraping and removal of adhesive residue remaining on the surface of the flexible reactive mesh 3.

[0041] The baffle 5 is a long, thin, planar plate arranged on the outside of the flexible reaction net 3. The baffle 5 is parallel to and close to all the fins 31. The baffle 5 is located above the flat chain 28, and its two ends are fixed to the opposite end faces of the sealed outer shell 1. When laid horizontally, the width of the baffle 5 (its height during use) is less than the gap between the flat chain 28 and the top of the sealed outer shell 1. The gap between the baffle 5 and the flat chain 28 is greater than 2 mm. The distance between the baffle 5 and the fins 31 on the same side is greater than 2 mm. This design allows the baffles 5 on both sides to wrap around the flexible reaction net 3, preventing raw materials from falling in the direction perpendicular to the direction of movement.

[0042] The technical solution of the present invention will be further described below based on the preferred embodiment. Specifically, the width of the chain drive mechanism 2, i.e., the distance between the two flat chains 28, is 1000 mm; the length of reaction zone A is 2000 mm; the length of separation zone B is 400 mm; the length of drive zone C is 300 mm; and the width of the flat chains 28 is 50 mm. The width of the discharge port is 500 mm. There are 5 heating shafts in reaction zone A and 1 pair of fixed shafts in separation zone B. The outer diameter of all drive wheels 27, driven wheels 22, and support wheels 24 is 200 mm, and the gap between them and the inner surface of the sealed shell 1 is 20 mm. The shaft diameter of drive shaft 26 and driven shaft 21 is 80 mm, and the shaft diameter of heating shaft 23 and fixed shaft 25 is 140 mm. The axial spacing of the fixed shafts 25 is 950 mm. High-temperature flue gas flows inside the heating shaft 23. The length of the fin 31 is 50 mm, and the diameter is 5 mm, ensuring that the gap between the edge of the fin 31 and the inner surface of the top of the sealed shell 1 is 50 mm. mm; 80 wing rods 31 are evenly spaced at the centerline of each flat chain 28; the width of the baffle 5 is 90 mm; the gap between the baffle 5 and the flat chain 28 is 4 mm; the distance between the baffle 5 and the wing rod on the same side is 4 mm; the flexible wire 32 is made of stainless steel wire, and in this embodiment it is used Figure 3The connection is made in a branched manner, but is not limited to this material and connection method; the flexible scraper 4 is a flat, strip-shaped, elastic thin stainless steel sheet, 60 mm long, 10 mm wide, and 0.2 mm thick; on the inner surface of the sealed outer shell 1 above the separation zone B, multiple flexible scrapers 4 are evenly arranged, with 7 distributed longitudinally and 40 distributed transversely. This ingenious arrangement allows the flexible scrapers 4 to achieve optimal efficiency in scraping and removing the adhesive residue remaining on the surface of the flexible reactive mesh 3.

[0043] To better achieve the above technical solution, the present invention also provides a pyrolysis method for strip-shaped organic waste, which utilizes the aforementioned chain pyrolysis device with transverse flexible filaments to pyrolyze the strip-shaped organic waste, and the steps include: S1. Drive the drive shaft 26 and drive wheel 27 to rotate, which drives a pair of flat chain 28 and flexible reaction net 3 to move together at a set speed, while heating multiple heating shafts 23 to their respective set temperatures. S2. The raw material enters the sealed shell 1 through the feed port 11 and falls on the flexible reaction net 3 at the beginning (upstream end) of the reaction zone A located in the chain transmission mechanism 2. Under the heating action of the heating shaft 23, the temperature gradually rises, the raw material softens and sticks to the flexible wire 32 and undergoes pyrolysis. S3, the flexible reaction net 3 continues to move along the ring under the drive of the flat chain 27, so that the raw material located at the beginning (upstream end) of the reaction zone A of the chain transmission mechanism 2 moves with the flexible reaction net 3 to the end (downstream end) of the reaction zone A and enters the separation zone B, the degree of pyrolysis gradually increases, and pyrolysis gas is generated. S4. Inside the separation zone B of the chain drive mechanism 2, the flexible scraper 4 and the flexible wire 32 of the flexible reaction net 3 intermittently collide, generating elastic high-frequency vibration. Through the intermittent vibration of the flexible wire 32 and the scraping action of the flexible scraper 4, the coke and slag remaining on the flexible reaction net 3 are peeled off and automatically discharged from the outlet 12 under the action of gravity, and collected by the solid collection system. S5. The generated pyrolysis gas is discharged through gas outlet 13. After condensation and separation, liquid products and non-condensable gases are collected.

[0044] To improve the pyrolysis efficiency of the raw materials, the heating shaft 23 is set to a temperature of 300~800℃, and the drive shaft 26 is set to a rotation speed of 1~20 r / min. This ensures that the temperature and reaction time during the pyrolysis process are as close as possible to the optimal pyrolysis environment for the specific strip-shaped raw materials, thereby improving the pyrolysis conversion rate of the raw materials and the yield of the target product. The following detailed description of the pyrolysis process using this pyrolysis device is provided through specific embodiments. The devices used in each embodiment have essentially the same structure.

[0045] Example 1 The temperatures of the five heating shafts 23 were adjusted sequentially from the upstream end to the downstream end: 400℃, 430℃, 460℃, 490℃, and 520℃, with a drive shaft speed of 4 r / min. Waste paper strips with an average length of 300 mm were fed into a chain pyrolysis device with transverse flexible filaments. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed. The liquid phase yield was 43.2%, with the target product, L-glucanone, accounting for 10.3 wt% of the liquid phase product, achieving efficient disposal and utilization of waste paper strips. Simultaneously, after the flexible reaction mesh 3 passed through the separation zone, the residue generated by pyrolysis on the flexible filaments 32 was essentially scraped off, effectively preventing the adhesion, clogging, and coking of the raw materials.

[0046] Example 2 The temperatures of the five heating shafts 23 were adjusted sequentially from the upstream end to the downstream end: 400℃, 450℃, 500℃, 550℃, and 600℃, with a drive shaft speed of 8 r / min. PET waste plastic wire with an average length of 200 mm was fed into a chain pyrolysis device with transverse flexible filaments. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed. The liquid phase yield was 36.5%, with the target product benzoic acid yielding 27.1 wt%, achieving efficient disposal and utilization of the waste plastic wire. Simultaneously, after the flexible reaction mesh 3 passed through the separation zone, the residue generated during pyrolysis on the flexible filaments 32 was essentially scraped off, effectively preventing the raw materials from sticking, clogging, and coking.

[0047] Example 3 The temperatures of the five heating shafts 23 were adjusted sequentially from the upstream end to the downstream end: 400℃, 500℃, 600℃, 700℃, and 500℃, with a drive shaft speed of 5 r / min. Waste denim processing material with an average length of 200 mm was fed into a chain pyrolysis device with transverse flexible filaments. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed, collecting 41.5% of the non-condensable gas, achieving efficient disposal and utilization of the waste denim processing material. Simultaneously, after the flexible reaction mesh 3 passed through the separation zone, the residue generated by pyrolysis on the flexible filaments 32 was essentially scraped off, effectively preventing the raw materials from sticking, clogging, and coking.

[0048] Example 4 The temperatures of the five heating shafts 23 were adjusted sequentially from the upstream end to the downstream end: 400℃, 550℃, 700℃, 550℃, and 400℃, with a drive shaft speed of 6 r / min. Waste tire strips with an average length of 300 mm were fed into a chain pyrolysis device with transverse flexible filaments. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed. The liquid phase yield was 40.7%, with the target aromatic hydrocarbon product accounting for 16.9 wt% of the liquid phase product, achieving efficient disposal and utilization of waste tire strips. Simultaneously, after the flexible reaction mesh 3 passed through the separation zone, the residue generated by pyrolysis on the flexible filaments 32 was essentially scraped off, effectively preventing the raw materials from sticking, clogging, and coking.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chain pyrolysis device with transverse flexible filaments, characterized in that, include: The sealed outer shell (1) is a sealed hollow box structure with a feed inlet (11) and an air outlet (13) at the top and a discharge outlet (12) at the bottom. Chain drive mechanism (2), the chain drive mechanism (2) is arranged inside the sealed housing (1), the chain drive mechanism (2) includes at least one pair of annular flat chains (28), and a drive wheel (27) and a driven wheel (22) for pulling the flat chains (28) to run. The flexible reaction net (3) includes multiple pairs of wing rods (31) spaced apart on the flat chain (28) and multiple parallel flexible wires (32) connected between the pairs of wing rods (31) on both sides. All the flexible wires (32) together form a mesh bearing surface. The flexible scraper (4) is an elastic structure and is located above the chain transmission mechanism (2). One end of the flexible scraper (4) is fixed to the inner surface of the sealed shell (1) and the other end can contact the flexible wire (32).

2. The chain pyrolysis device with transverse flexible filaments according to claim 1, characterized in that, The chain drive mechanism (2) is divided into a reaction zone (A), a separation zone (B) and a drive zone (C) in sequence along the direction of motion. A driven shaft (21) is arranged at the upstream end of the reaction zone (A) in the direction of movement. The driven wheels (22) are fixed at both ends of the driven shaft (21) and rotate with the two flat chains (28) respectively. A heating shaft (23) is arranged at the downstream side of the driven shaft (21) in the reaction zone (A). Support wheels (24) are installed at both ends of the heating shaft (23) to support the flat chains (28) on both sides respectively. A fixed shaft (25) is arranged in the separation zone (B), and a support wheel (24) is installed on the fixed shaft (25) to support the flat chain (28). A drive shaft (26) is arranged in the drive area (C), and the drive wheels (27) are fixed at both ends of the drive shaft (26) to pull the two flat chains (28) to rotate.

3. The chain pyrolysis device with transverse flexible filaments according to claim 2, characterized in that, The heating shaft (23) is a hollow pipe, through which a heating medium flows, including high-temperature flue gas or molten salt.

4. The chain pyrolysis device with transverse flexible filaments according to claim 2, characterized in that, The driven shaft (21) and the driving shaft (26) respectively pass through and rotate on the end face of the sealed shell (1); The drive shaft (26) passes through one end of the sealed housing (1) and is connected to the drive system; The driven shaft (21) is connected to a tensioning mechanism that straightens the flat chain (28).

5. The chain pyrolysis device with transverse flexible filaments according to claim 2, characterized in that, The feed inlet (11) is located on the top of the sealed shell (1) above the upstream end of the reaction zone. The feed inlet (11) is connected to the feeding system. The width of the feed inlet (11) is smaller than the width of the reaction zone. The discharge port (12) is located at the bottom of the sealed shell (1) below the separation zone. The discharge port (12) is connected to the solid collection system. The width of the discharge port (12) is greater than the width of the separation zone. The outlet (13) is located on the top of the sealed shell (1) above the downstream end of the reaction zone, and the outlet (13) is connected to the separation and condensation system.

6. The chain pyrolysis device with transverse flexible filaments according to claim 2, characterized in that, The number of flexible scrapers (4) is multiple, and the flexible scrapers (4) are flat strip-shaped elastic structures and are arranged at intervals above the separation zone.

7. The chain pyrolysis device with transverse flexible filaments according to claim 1, characterized in that, The flexible filament (32) has branches, and the length of the branches is greater than the spacing between adjacent flexible filaments (32); the branches are placed on the adjacent flexible filaments (32) in the opposite direction of the movement direction.

8. The chain pyrolysis device with transverse flexible filaments according to claim 1, characterized in that, The sealed outer shell (1) is also provided with baffles (5), and at least one pair of baffles (5) are respectively arranged on both sides of the flexible reaction net (3) and parallel to and close to the wing (31); The baffle (5) is located above the flat chain (28), and the width of the baffle (5) is smaller than the gap between the flat chain (28) and the top of the sealed shell (1). The baffle (5) is fixed to the inner wall of the sealed outer shell (1).

9. The chain pyrolysis device with transverse flexible filaments according to claim 1, characterized in that, Two links on opposite positions of a pair of flat chains (28) are connected by thin rods.

10. A pyrolysis method, implemented using a chain pyrolysis apparatus with transverse flexible filaments as described in any one of claims 1-9, characterized in that, The pyrolysis method includes the following steps: S1. Drive the drive shaft (26) and drive wheel (27) to rotate, which drives a pair of flat chains (28) and flexible reaction net (3) to move together at a set speed, while heating multiple heating shafts (23) to their respective set temperatures; S2. The raw material enters the sealed shell (1) through the feed port (11) and falls on the flexible reaction net (3) located at the upstream end of the reaction zone of the chain transmission mechanism (2). Under the heating action of the heating shaft (23), the temperature gradually rises, the raw material softens and sticks to the flexible filament (32) and undergoes pyrolysis. S3. The flexible reaction net (3) continues to move along the ring under the drive of the flat chain (27), so that the raw material located at the upstream end of the reaction zone of the chain transmission mechanism (2) moves with the flexible reaction net (3) to the downstream end of the reaction zone and enters the separation zone, the degree of pyrolysis gradually increases, and pyrolysis gas is generated. S4. Inside the separation zone of the chain drive mechanism (2), the flexible scraper (4) and the flexible wire (32) of the flexible reaction net (3) collide intermittently, generating elastic high-frequency vibration. Through the intermittent vibration of the flexible wire (32) and the scraping action of the flexible scraper (4), the coke and slag remaining on the flexible reaction net (3) are peeled off and automatically discharged from the outlet (12) through the flexible reaction net (3) under the action of gravity, and collected by the solid collection system. S5. The generated pyrolysis gas is discharged through the gas outlet (13), and after condensation and separation, the liquid products and non-condensable gases are collected.

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