Pyrolysis apparatus and pyrolysis method

Abstract

This invention relates to the field of pyrolysis technology, and in particular to a pyrolysis apparatus and method. The pyrolysis apparatus includes a chain drive mechanism, a flexible reaction net, a scraper mechanism, and a cleaning mechanism. The chain drive mechanism includes a pair of parallel and horizontally placed flat annular outer plate chains and a pair of inner plate chains, along with their driving and supporting components. The flexible reaction net is divided into inner and outer layers, including multiple pairs of wing rods spaced apart on the two pairs of plate chains and flexible rods extending inclined between the plate chains and intersecting each other. The scraper mechanism has multiple flexible scrapers. One end of the cleaning mechanism can contact and clean the outer layer of flexible rods. This invention enables direct and efficient pyrolysis of large-sized strip-shaped organic waste, solving the technical problems of existing pyrolysis devices for treating strip-shaped organic waste, such as easy softening, adhesion, and blockage of raw materials, severe coking and slagging, and high pretreatment costs.

Description

Technical Field

[0001] This invention relates to the field of pyrolysis technology, and in particular to a pyrolysis apparatus and a pyrolysis method. 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 The purpose of this invention is to provide a pyrolysis device and a pyrolysis method to 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.

[0005] The present invention provides a pyrolysis device, including a sealed outer shell, wherein the sealed outer shell is a sealed hollow box structure and has an inlet, an outlet and an outlet, and the sealed outer shell is provided with a chain drive mechanism, a flexible reaction net and a scraper mechanism. The chain drive mechanism includes a pair of parallel and horizontally placed flat annular outer plate chains and a pair of inner plate chains, as well as drive wheels, driven wheels, and support wheels for supporting and traction of the outer and inner plate chains, inner drive shafts and outer drive shafts for mounting the drive wheels and driven wheels, and fixed shafts and heating shafts for mounting the support wheels; the inner plate chains have the same structure as the outer plate chains and are parallel to each other, and the inner plate chains are located inside the outer plate chains; The flexible reactive mesh is divided into an outer layer and an inner layer, including multiple outer wing rods spaced apart on the two outer plate chains and extending in a vertically outward direction, multiple inner wing rods spaced apart on the two inner plate chains and extending in a vertically outward direction, and flexible rods with one end connected to the free ends of the outer and inner wing rods and the other end extending into the area between the two inner plate chains; each outer wing rod and inner wing rod is connected to one flexible rod; the flexible rods on all the outer wing rods together constitute the outer mesh surface, and the flexible rods on all the inner wing rods together constitute the inner mesh surface, with the inner and outer mesh surfaces facing opposite directions overlapping to form a dense structure; "inner and outer layers facing opposite directions" means that the inclination direction of the flexible rods in the outer mesh surface is opposite to the inclination direction of the flexible rods in the inner mesh surface. The scraper mechanism includes multiple flexible scrapers located in the forward direction of the flexible reaction net.

[0006] Preferably, the chain drive mechanism is divided into an inner drive zone, an inner separation zone, a reaction zone, an outer separation zone, and an outer drive zone connected sequentially from the beginning to the end; in the upper part of the chain drive mechanism, the outer flat chain runs from the beginning to the end, and the inner flat chain runs from the end to the beginning.

[0007] Preferably, the two outer plate chains are respectively close to the two opposite end faces of the sealed shell, and the two inner plate chains are respectively close to the inner sides of the two outer plate chains; an inner drive shaft is arranged in the inner drive area, an outer drive shaft is arranged in the outer drive area, one or more pairs of fixed shafts are arranged in the inner separation area and the outer separation area respectively, and multiple heating shafts are arranged in the reaction area; all the inner drive shafts, fixed shafts, heating shafts and outer drive shafts are arranged parallel to each other on a plane.

[0008] Preferably, the outer wing rods on the two outer plate chains are asymmetrically distributed on the two outer plate chains, and the flexible rods on the outer wing rods extend at an angle in the opposite direction of movement of the outer plate chains; the inner wing rods on the two inner plate chains are asymmetrically distributed on the two inner plate chains, and the flexible rods on the inner wing rods extend at an angle in the opposite direction of movement of the inner plate chains; all the outer wing rods are of the same length, all the inner wing rods are of the same length, and the length of the outer wing rods is greater than the length of the inner wing rods.

[0009] Preferably, the scraper mechanism further includes an inner scraper frame arranged in the inner separation zone and an outer scraper frame arranged in the outer separation zone, with flexible scrapers spaced apart on the outer scraper frame and the inner scraper frame; the outer scraper frame is a flat plate structure and is fixed to the inner surface of the sealed shell above the outer separation zone; the inner scraper frame is a flat plate structure with both ends fixed to the fixed shaft, and the inner scraper frame is located between the mesh surfaces of the outer and inner layers; the flexible scrapers are all flat strip-shaped elastic structures; one end of the flexible scraper is fixed to the lower surface of the outer scraper frame and the inner scraper frame, and the other end of the flexible scraper fixed to the lower surface of the outer scraper frame can contact the mesh surface of the outer layer; the other end of the flexible scraper fixed to the lower surface of the inner scraper frame can contact the mesh surface of the inner layer.

[0010] Preferably, it further includes an upper baffle and a lower baffle. Both the pair of upper baffles and the pair of lower baffles are planar long thin plates that are perpendicular to the mesh surface, parallel to the running direction of the outer flat plate chain and the inner flat plate chain, and symmetrically arranged on both sides. The upper baffle is located above the mesh surface of the outer layer, and its two ends are fixed to the opposite end faces of the sealed shell. The lower baffle is located between the mesh surfaces of the outer and inner layers, and its upper end face is connected to the inner scraper frame.

[0011] Preferably, it further includes a cleaning mechanism, one end of which can contact and clean the flexible rod of the outer layer. The cleaning mechanism is composed of elastic steel brushes and is arranged vertically on the vertical end face of the sealed shell in the inner drive area. One end of the cleaning mechanism is fixed to the inner surface of the sealed shell, and the other end contacts the flexible rod that makes a circular motion around the inner drive shaft in the inner drive area.

[0012] Preferably, the feed inlet is located on the top of the sealed shell above the inner separation zone of the chain drive mechanism, and the feed inlet is connected to the feeding system; there are two discharge outlets, located at the bottom of the sealed shell below the inner drive zone and inner separation zone of the chain drive mechanism and below the outer separation zone, respectively, and the discharge outlets are connected to the solid collection system; the gas outlet is located on the top of the sealed shell above the reaction zone of the chain drive mechanism, and the gas outlet is connected to the separation and condensation system.

[0013] Preferably, high-temperature flue gas or molten salt circulates inside the heating shaft; the flexible rod is made of stainless steel, aluminum-titanium alloy, nickel-based alloy, or chromium-based alloy steel; the flexible scraper is a steel sheet; the spacing between adjacent flexible rods of the inner flexible reaction net is smaller than the spacing between adjacent flexible rods of the outer flexible reaction net; branches may be provided on the flexible rod, and the flexible rod and its branches extend at an angle in the opposite direction to the movement direction of the outer and inner plate chains, with the angle between the extension direction and the movement direction being greater than 90° and less than 180°.

[0014] The present invention also provides a pyrolysis method, which is implemented based on the above-described pyrolysis apparatus, and the pyrolysis method includes the following steps: S1. Drive the inner drive shaft and the outer drive shaft to rotate, and drive the pair of inner flat plate chains and the pair of outer flat plate chains and their corresponding inner and outer flexible reaction nets to move towards each other at a set speed through the drive wheels, while heating the heating shaft to their respective set temperatures. S2. The raw material enters the sealed shell through the feed port and falls on the outer mesh surface of the flexible reaction mesh located in the inner separation zone. Under the heating action of the heating shaft, the temperature gradually rises, the raw material softens and sticks to the flexible rod and undergoes pyrolysis. S3. The outer flexible reaction net continues to move along the ring under the drive of the outer plate chain, causing the raw materials located in the inner separation zone to move to the reaction zone and enter the outer separation zone, gradually increasing the degree of pyrolysis and generating pyrolysis steam. S4. In the outer separation zone, the flexible scraper on the outer scraper frame intermittently collides with the flexible rod of the outer flexible reaction net, generating elastic high-frequency vibration, peeling off the incompletely pyrolyzed raw materials remaining on the outer flexible reaction net, and simultaneously crushing the pyrolysis residue coke and waste residue. S5. The unpyrolyzed raw material peeled off from the outer flexible reaction net falls onto the inner flexible reaction net; the inner flexible reaction net continues to move in the opposite direction along the ring under the drive of the inner plate chain, so that the unpyrolyzed raw material located in the outer separation zone moves to the reaction zone and enters the inner separation zone, continues to generate pyrolysis steam until it is completely pyrolyzed and converted into coke and waste residue. S6. In the inner separation zone, the flexible scraper on the inner scraper frame intermittently collides with the flexible rod of the inner flexible reaction net, generating elastic high-frequency vibrations to peel off the coke and waste residue remaining on the inner flexible reaction net. S7. The outer flexible reaction net moves from the lower half of the chain drive mechanism to the inner drive area along with the outer flat plate chain and rotates around the inner drive shaft. During this process, the gap between the flexible rods increases and they collide and rub against the cleaning mechanism to remove the coke and waste residue that are tightly adhered to the flexible rods. S8. The coke and waste fragments stripped from the inner drive zone, inner separation zone and outer separation zone pass through the flexible reaction net under the action of gravity and are automatically discharged from the discharge port below, and collected by the solid collection system; the generated pyrolysis steam is discharged through the gas outlet, and after condensation and separation, the liquid products and non-condensable gases are collected.

[0015] Beneficial effects: This invention provides a pyrolysis apparatus that, through the construction of a double-layer flexible reaction net, utilizes staggered inner and outer layers of fins and flexible rods to form a dense mesh surface. When strip-shaped waste materials (such as paper, tires, fibers, textiles, rubber, and plastics) are directly fed into the inlet, they can be effectively supported, held, and transported by the flexible reaction net, entering the pyrolysis reaction zone without the need for crushing pretreatment. This not only avoids the high power consumption and bulky equipment problems of the pretreatment stage, significantly reducing processing costs, but also ensures that the raw materials are in full contact with the heat source (such as a heating shaft) during pyrolysis, guaranteeing the uniformity and efficiency of the pyrolysis reaction.

[0016] Secondly, this invention incorporates a scraper mechanism in the forward direction of the flexible reaction mesh. Due to the flexibility of the mesh surface formed by the flexible rods, the scraper mechanism effectively removes coke, pyrolysis residues, and adhering materials from the mesh surface upon reaching it, preventing the materials from softening and accumulating due to heat. The synergistic cooperation between the double-layer reaction mesh and the scraper achieves a self-cleaning function for the materials, fundamentally solving the problems of clogging and coking / slagging that easily occur in traditional pyrolysis devices when processing long, strip-shaped raw materials, thus ensuring the long-term stable and continuous operation of the device.

[0017] Furthermore, the rational layout of the flat chain, drive wheel, and support wheel in the chain drive mechanism ensures the stable operation of the flexible reaction network under high-temperature conditions, further improving the reliability and pyrolysis efficiency of the device. This device is compact, stable in operation, and widely adaptable, and can be widely applied to the resource-based treatment of organic strip-shaped waste, offering significant environmental and economic benefits. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the pyrolysis apparatus of the present invention; Figure 2 for Figure 1 A schematic diagram of the chain drive mechanism; Figure 3 for Figure 1 A schematic diagram of the cross-sectional structure of the inner separation zone; Figure 4 for Figure 1 A schematic diagram of the cross-sectional structure of the outer separation zone; Figure 5 This is a schematic diagram of the inner and outer layers of the flexible reaction mesh. Figure 6 This is a schematic diagram of the three-dimensional structure of a flexible reactive mesh with inner and outer layers.

[0020] Explanation of reference numerals in the attached diagram: 1: Sealed outer shell; 11: Inlet; 12: Outlet; 13: Air outlet; 2: Chain drive mechanism; 21: Inner drive shaft; 22: Fixed shaft; 23: Heating shaft; 24: Outer drive shaft; 25: Drive wheel; 26: Driven wheel; 27: Support wheel; 28: Outer flat chain; 29: Inner flat chain; 3: Flexible reactive mesh; 31: Outer wing rod; 32: Inner wing rod; 33: Flexible rod; 4: Scraper mechanism; 41: Outer scraper frame; 42: Inner scraper frame; 43: Flexible scraper; 5: Upper baffle; 6: Lower baffle; 7: Cleaning facilities. Detailed Implementation

[0021] 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.

[0022] 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 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 limitations on this invention.

[0023] 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, features defined with "first" and "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.

[0024] Device Examples See Figures 1 to 4 The present invention provides a stacked chain pyrolysis device with a mesh flexible rod, which includes a sealed shell 1, a chain transmission mechanism 2, a flexible reaction mesh 3, a scraper mechanism 4, an upper baffle 5, a lower baffle 6 and a cleaning mechanism 7. The sealed outer shell 1 is a sealed hollow box structure. The chain drive mechanism 2, flexible reaction net 3, scraper mechanism 4, a pair of upper baffles 5 and a pair of lower baffles 6 are located inside the sealed outer shell 1. The sealed outer shell 1 is provided with a feed inlet 11, a discharge outlet 12 and an air outlet 13. The chain drive mechanism 2 includes a pair of parallel and horizontally placed flat annular outer flat chains 28 and a pair of inner flat chains 29, a drive wheel 25, a driven wheel 26, and a support wheel 27 for supporting and traction of the outer flat chains 28 and the inner flat chains 29, an inner drive shaft 21 and an outer drive shaft 24 for mounting the drive wheels 25 and the driven wheels 26, and a fixed shaft 22 and a heating shaft 23 for mounting the support wheels 27; the inner flat chains 29 have the same structure as the outer flat chains 28 and are parallel to each other, and the inner flat chains 29 are located inside the outer flat chains 28; the chain drive mechanism 2 is divided into an inner drive zone A, an inner separation zone B, a reaction zone C, an outer separation zone D, and an outer drive zone E connected sequentially from the beginning to the end; in the upper part of the chain drive mechanism 2, the outer flat chains 28 run from the beginning to the end, and the inner flat chains 29 run from the end to the beginning; Two outer flat chains 28 are respectively close to the two opposite end faces of the sealed outer shell 1, and two inner flat chains 29 are respectively close to the inner sides of the two outer flat chains 28. In the inner drive area A of the chain transmission mechanism 2, an inner drive shaft 21 is arranged. Two drive wheels 25 and two driven wheels 26 are symmetrically installed on both sides of the axial direction of the inner drive shaft 21. The drive wheels 24 are located on the inner side and fixed on the inner drive shaft 21, respectively driving the two inner flat chains 29 to move. The driven wheels 26 are located on the outer side and connected to the inner drive shaft 21 through bearings, respectively following the rotation of the two outer flat chains 28 and restricting the movement position of the outer flat chains 28. In the inner separation area B and the outer separation area D, one or more pairs of fixed shafts 22 are arranged respectively. Each pair of fixed shafts 22 is coaxially symmetrically arranged and respectively Located on both sides of the axial direction, each fixed shaft 22 is equipped with two support wheels 27; in the reaction zone C, multiple heating shafts 23 are arranged, and each heating shaft 23 has two pairs of support wheels 27 symmetrically installed on both sides of its axial direction; the support wheels 27 are connected to the heating shafts 23 and the fixed shafts 22 through bearings and can rotate freely; two pairs of support wheels 24 located symmetrically on both sides support one pair of outer flat chains 28 and one pair of inner flat chains 29 respectively; in the outer drive zone E, an outer drive shaft 24 is arranged; two drive wheels 25 and two driven wheels 26 are symmetrically installed on both sides of the outer drive shaft 24, the drive wheels 24 are located on the outer side and fixed to the outer drive shaft 24, respectively driving the two outer flat chains 28 to move, and the driven wheels 26 are located on the inner side and connected to the outer chain 28 through bearings. The drive shafts 24 are connected and rotate with the two inner flat chains 29 respectively, limiting the movement position of the inner flat chains 29; all the inner drive shafts 21, fixed shafts 22, heating shafts 23 and outer drive shafts 24 are arranged parallel to each other on a plane; all the drive wheels 25, driven wheels 26 and support wheels 27 have the same outer diameter, and the outer flat chains 28 and inner flat chains 29 respectively surround the annular area formed by the outer surfaces of their respective drive wheels 25, driven wheels 26 and support wheels 27; the inner drive shafts 21, outer drive shafts 24 and fixed shafts 22 are solid shafts, and the heating shaft 23 is a hollow pipe; the inner drive shafts 21 and outer drive shafts 24 both penetrate the opposite end faces of the sealed housing 1 and are supported by the sealed housing 1 through bearings; the inner drive shafts 21 and outer drive shafts 24 pass through... The end faces of the sealed housing 1 are connected to the drive system, which can drive the inner drive shaft 21, the outer drive shaft 24 and the drive wheel 25 to rotate, further driving the outer flat chain 28 and the inner flat chain 29 to move; the outer drive shaft 24 is equipped with a matching tensioning mechanism to straighten the outer flat chain 28 and the inner flat chain 29; 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 the two opposite end faces of the sealed housing 1 and is fixed to the sealed housing 1; the gap between the outer flat chain 28 and the side of the sealed housing 1 is greater than 10mm, and the gap between the outer flat chain 28 and the inner flat chain 29 on the same side is 50~100mm; high-temperature flue gas or molten salt flows inside the heating shaft 23;The axial spacing x of each pair of fixed shafts 22 is less than the spacing between the two inner flat chain plates 29, and the difference does not exceed 50 mm.

[0025] The feed inlet 11 is located on the top of the sealed shell 1 above the inner separation zone B of the chain drive mechanism 2, and is connected to the feeding system. There are two discharge outlets 12, located at the bottom of the sealed shell 1 below the inner drive zone A and inner separation zone B of the chain drive mechanism 2 and below the outer separation zone D, respectively. The discharge outlets 12 are connected to the solid collection system. The width of the two discharge outlets 12 is greater than the sum of the widths of the inner drive zone A and inner separation zone B of the chain drive mechanism 2 and the width of the outer separation zone D, respectively. The air outlet 13 is located on the top of the sealed shell 1 above the reaction zone C of the chain drive mechanism 2, and is connected to the separation and condensation system.

[0026] The flexible reactive mesh 3 is divided into an outer layer and an inner layer, including multiple outer wing rods 31 spaced apart on two outer flat plate chains 28 and extending in a vertically outward direction, multiple inner wing rods 32 spaced apart on two inner flat plate chains 29 and extending in a vertically outward direction, and a flexible rod 33 with one end connected to the free ends of the outer wing rods 31 and inner wing rods 32 and the other end extending into the area between the two inner flat plate chains 29; each outer wing rod 31 and inner wing rod 32 is connected to a flexible rod 33; the outer wing rods on the two outer flat plate chains 28 The distribution position of the outer wing rods 31 is offset by a certain distance, so that the outer wing rods 31 are asymmetrically distributed (staggered) on the two outer plate chains 28, and the flexible rods 33 on the outer wing rods 31 extend in the opposite direction of the movement of the outer plate chains 28; the distribution position of the inner wing rods 32 on the two inner plate chains 29 is offset by a certain distance, so that the inner wing rods 32 are asymmetrically distributed (staggered) on the two inner plate chains 29, and the flexible rods 33 on the inner wing rods 32 extend in the opposite direction of the movement of the inner plate chains 29. The flexible rods extend in an inclined direction; all outer wing rods 31 are of the same length, and all inner wing rods 32 are of the same length, with the length of the outer wing rods 31 being greater than that of the inner wing rods 32; the flexible rods 33 on all outer wing rods 31 together form the outer mesh surface, and the flexible rods 33 on all inner wing rods 32 together form the inner mesh surface, with the inner and outer mesh surfaces facing opposite directions overlapping to form a dense structure; the spacing between adjacent flexible rods 33 in the inner flexible reaction mesh 3 is smaller than the spacing between adjacent flexible rods 33 in the outer flexible reaction mesh 3 (to accommodate raw materials with large volume changes during pyrolysis); branches can be set on the flexible rods 33, and the flexible rods 33 and their branches extend in an inclined direction in the opposite direction to the movement direction of the outer plate chain 28 and the inner plate chain 29, with the angle between the extension direction and the movement direction being greater than 90° and less than 180° (to reduce the resistance when the flexible rods 33 and their branches move relative to the flexible scraper 43); the material of the flexible rods 33 is high-temperature resistant stainless steel, aluminum-titanium alloy, nickel-based alloy, or chromium-based alloy steel. It should be noted that the "flexible rod" mentioned in this article does not refer to the rod material itself having soft properties, but rather to the rod being designed as a slender structure (i.e., with a large length-to-diameter ratio), enabling it to undergo elastic bending deformation when subjected to an external force perpendicular to the axial direction, and to return to its original shape after the external force is removed. The stainless steel, aluminum-titanium alloy, nickel-based alloy, or chromium-based alloy steel materials maintain good elastic modulus and fatigue resistance at high temperatures, and combined with their slender geometry, together achieve the "flexible" (i.e., elastic) function required by this invention.

[0027] The scraper mechanism 4 includes an inner scraper frame 42 arranged in the inner separation zone B, an outer scraper frame 41 arranged in the outer separation zone D, and flexible scrapers 43 spaced apart on the outer scraper frame 41 and the inner scraper frame 42. The outer scraper frame 41 is a flat plate structure and is fixed to the inner surface of the sealed outer shell 1 above the outer separation zone D. The inner scraper frame 42 is a flat plate structure with both ends fixed to the fixed shaft 22, and the inner scraper frame 42 is located between the mesh surfaces of the outer and inner layers. The flexible scrapers 43 are all flat strip-shaped elastic structures. One end of the flexible scraper 43 is fixed to the outer scraper frame 41 and the inner scraper frame. The lower surface of the inner scraper frame 42 and the other end can respectively contact the inner and outer mesh surfaces; the inner scraper frame 42 has an inverted U-shaped structure, with both ends fixed on the fixed shaft 22 and located between two pairs of support wheels 27; the interval between adjacent flexible scrapers 43 on the outer scraper frame 41 and the inner scraper frame 42 is at least 10mm; the gap between the free end of the outer wing rod 31 and the outer scraper frame 41 and the gap between the free end of the inner wing rod 32 and the inner scraper frame 42 are both 20~100mm, and the length of the flexible scraper 43 is 5~10mm longer than the gap; the flexible scraper 43 is a steel sheet. This design allows the flexible scraper 43 to fully contact the flexible rod 33, facilitating the scraping and removal of adhesive residues remaining on the surface of the flexible reactive mesh 3.

[0028] Both the upper baffles 5 and the lower baffles 6 are planar, long, thin plates perpendicular to the mesh surface, parallel to the running directions of the outer flat chain 28 and the inner flat chain 29, and symmetrically arranged on both sides. The upper baffles 5 are located above the outer mesh surface and are fixed at both ends to the opposite end faces of the sealed shell 1. The lower baffles 6 are located between the outer and inner mesh surfaces and their upper end faces are connected to the inner scraper frame 42. The width of the upper baffles 5 is less than the distance between the outer mesh surface of the flexible reaction mesh 3 and the top of the sealed shell 1. The width of the lower baffles 6 is less than the distance between the outer and inner mesh surfaces of the flexible reaction mesh 3. The length of the lower baffles 6 is less than the distance between the inner drive shaft 21 and the outer drive shaft 24. The spacing between the upper baffles 5 and the lower baffles 6 is the same, y, which is less than the axial spacing x of the fixed shaft 22, and the difference does not exceed 50 mm. The width of the feed inlet 11 is less than the spacing y. This design prevents the raw materials from falling in the direction perpendicular to the direction of movement from the upper baffles 5 and the lower baffles 6 on both sides.

[0029] The cleaning mechanism 7 is composed of elastic steel brushes and is arranged vertically on the vertical end face of the sealed shell 1 of the inner drive zone A. One end of the cleaning mechanism 7 is fixed to the inner surface of the sealed shell 1, and the other end is in contact with the flexible rod 33 that makes a circular motion around the inner drive shaft 21 in the inner drive zone A.

[0030] The technical solution of the present invention will be further described below based on the preferred embodiment. Specifically, the chain drive mechanism 2 is divided into an inner drive zone A, an inner separation zone B, a reaction zone C, an outer separation zone D, and an outer drive zone E connected sequentially from the beginning to the end. Figure 1and Figure 2 (From left to right in the image); the width of the chain drive mechanism 2, i.e., the distance between the two outer flat chains 28, is 1300mm; the length of the reaction zone C is 2000mm; the lengths of the inner separation zone B and the outer separation zone D are 300mm; the lengths of the inner drive zone A and the outer drive zone E are 300mm; the widths of the outer flat chains 28 and the inner flat chains 29 are both 50mm; the distance between the outer flat chains 28 and the inner flat chains 29 on the same side is 50mm; the distance between the outer flat chains 28 and the inner surface of the sealed shell 1 on the same side is... The gap between them is 20mm; the length of the feed inlet is 800mm and the width is 300mm, and the length of the discharge inlet is 1000mm and the width is 400mm; there are 4 heating shafts in reaction zone C, and 1 pair of fixed shafts each in inner separation zone B and outer separation zone D; the outer diameter of all drive wheels 25, driven wheels 26 and support wheels 27 is 200mm; the shaft diameter of inner drive shaft 21 and outer drive shaft 24 is 80mm, and the shaft diameter of heating shaft 23 and fixed shaft 22 is 140mm; Reference Figure 1 , Figure 3 and Figure 4 The axial spacing x of the fixed shaft 25 is 950mm; high-temperature flue gas flows inside the heating shaft 23; the outer wing rod 31 is 100mm long and 5mm in diameter, ensuring a 30mm gap between the edge of the outer wing rod 31 and the outer scraper frame 41; the inner wing rod 32 is 10mm long and 5mm in diameter, ensuring a 30mm gap between the edge of the inner wing rod 32 and the inner scraper frame; 80 outer wing rods 31 are evenly spaced at the centerline of each outer flat chain 28, and the outer wing rods 31 on both sides of the outer flat chain 28 are spaced apart; 100 inner wing rods 32 are evenly spaced at the centerline of each inner flat chain 29, and the inner wing rods 32 on both sides of the inner flat chain 29 are spaced apart; the upper baffle 5 is 50mm wide, and the lower baffle 6 is 80mm wide and 2800mm long; (Reference) Figure 3 The distance y between the pair of upper baffles and the pair of lower baffles is 900mm; the flexible rod 33 is made of stainless steel, the length of the flexible rod 33 is 600mm, and the angle between the extension direction of the flexible rod 33 and its movement direction is 105°. This embodiment adopts... Figure 5 The arrangement can be done without branches, but is not limited to this material and arrangement method; please refer to the specific arrangement of the outer wing rods, inner wing rods, and flexible rods. Figure 6 The outer plate chain has evenly distributed outer wing rods, and the inner plate chain has evenly distributed inner wing rods. Figure 6To more clearly demonstrate its specific structure and arrangement, only a portion of the outer and inner wing rods are shown. The distance between the rotation axis of the inner drive shaft 21 and the end face of the cleaning mechanism is 150mm; the flexible scraper 43 is a flat, strip-shaped, elastic thin stainless steel sheet, 40mm long, 10mm wide, and 0.2mm thick; multiple flexible scrapers 43 are evenly arranged on the lower surfaces of the outer scraper frame 41 and the inner scraper frame 41, with 6 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.

[0031] Method Implementation Examples To better achieve the above technical solution, the present invention also provides a pyrolysis method for strip-shaped organic waste, which utilizes the aforementioned stacked chain pyrolysis device with mesh flexible rods to pyrolyze the strip-shaped organic waste, and the steps include: S1. Drive the inner drive shaft 21 and the outer drive shaft 24 to rotate, and drive the pair of inner flat plate chains 29 and the pair of outer flat plate chains 28 and their corresponding inner and outer flexible reaction nets 3 to move towards each other at a set speed through the drive wheel 25. At the same time, heat the heating shaft 23 to its respective set temperature. S2. The raw material enters the sealed shell 1 through the feed port 11 and falls on the outer mesh surface of the flexible reaction net 3 located in the inner separation zone. Under the heating action of the heating shaft 23, the temperature gradually rises, the raw material softens and sticks to the flexible rod 33 and undergoes pyrolysis. S3, the outer flexible reaction net 3 continues to move along the ring under the drive of the outer plate chain 28, so that the raw material located in the inner separation zone moves to the reaction zone and enters the outer separation zone, the degree of pyrolysis gradually increases, and pyrolysis steam is generated; S4. In the outer separation zone, the flexible scraper 43 located on the outer scraper frame 41 intermittently collides with the flexible rod 33 of the outer flexible reaction net 3, generating elastic high-frequency vibration, peeling off the unpyrolyzed raw materials remaining on the outer flexible reaction net 3, and simultaneously crushing the pyrolysis residue coke and waste residue. S5. The unpyrolyzed raw material peeled off from the outer flexible reaction net 3 falls onto the inner flexible reaction net 3. The inner flexible reaction net 3 continues to move in the opposite direction along the ring under the drive of the inner plate chain 28, so that the unpyrolyzed raw material located in the outer separation zone moves to the reaction zone and enters the inner separation zone, continuing to generate pyrolysis steam until it is completely pyrolyzed and converted into coke and waste residue. S6. In the inner separation zone, the flexible scraper 43 located on the inner scraper frame 42 intermittently collides with the flexible rod 33 of the inner flexible reaction net 3, generating elastic high-frequency vibration, and peeling off the coke and waste residue remaining on the inner flexible reaction net 3. S7. The outer flexible reaction net 3 moves from the lower half of the chain drive mechanism to the inner drive area along with the outer flat plate chain 28 and rotates around the inner drive shaft 21. During this process, the gap between the flexible rods 33 increases and collides and rubs with the cleaning mechanism 7 to remove the coke and waste residue that are tightly adhered to the flexible rods 33. S8. The coke and waste fragments stripped from the inner drive zone, inner separation zone and outer separation zone pass through the flexible reaction net 3 under the action of gravity and are automatically discharged from the discharge port 12 below, and collected by the solid collection system; the generated pyrolysis steam is discharged through the gas outlet 13, and after condensation and separation, the liquid products and non-condensable gases are collected.

[0032] To improve the pyrolysis efficiency of the raw materials, the heating shaft 23 is set to a temperature of 300~800℃, and the rotational speeds of the inner drive shaft 21 and the outer drive shaft 24 are set to 1~20 r / min. This ensures that the temperature and reaction time conditions 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 embodiments employ devices with essentially the same structure.

[0033] Implementation Plan 1 The temperatures of the four heating shafts 23 were adjusted sequentially from the first to the last: 400℃, 430℃, 470℃, and 500℃. The rotational speeds of the outer drive shaft 24 and the inner drive shaft 21 were both 4 r / min. Waste paper strips with an average length of 300 mm were fed into a stacked chain pyrolysis device with a mesh flexible rod. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed, with a liquid phase yield of 43.8%. The target product, L-glucanone, accounted for 10.4 wt% of the liquid phase product, achieving efficient disposal and utilization of waste paper strips. Simultaneously, after the outer and inner flexible reaction meshes 3 passed through the inner drive zone / outer separation zone and the inner separation zone, respectively, the residue generated by pyrolysis on the flexible rods 33 was basically scraped off, effectively preventing the adhesion, blockage, coking, and slagging of the raw materials.

[0034] Implementation Plan 2 The temperatures of the four heating shafts 23 were adjusted sequentially from the beginning to the end to 450℃, 500℃, 550℃, and 600℃, respectively. The rotational speeds of the outer drive shaft 24 and the inner drive shaft 21 were both 8 r / min. PET waste plastic wire with an average length of 200 mm was fed into a stacked chain pyrolysis device with a mesh flexible rod. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed, achieving a liquid phase yield of 36.5%, with the target product benzoic acid yielding 26.0 wt%, thus realizing the efficient disposal and utilization of waste plastic wire. Simultaneously, after the outer and inner flexible reaction meshes 3 passed through the inner drive zone / outer separation zone and the inner separation zone, respectively, the residue generated by pyrolysis on the flexible rods 33 was essentially scraped off, effectively preventing the adhesion, blockage, coking, and slagging of the raw materials.

[0035] Implementation Plan 3 The temperatures of the four heating shafts 23 were adjusted sequentially from the first to the last: 400℃, 550℃, 700℃, and 600℃. The outer drive shaft 24 rotated at 5 r / min, and the inner drive shaft 21 rotated at 8 r / min (to accelerate the movement of incompletely pyrolyzed raw materials on the inner flexible reaction mesh). Waste denim processing waste with an average length of 200 mm was fed into a stacked chain pyrolysis device with mesh flexible rods. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed, with 43.4% of the non-condensable gas collected, achieving efficient disposal and utilization of waste denim processing waste. Simultaneously, after the outer and inner flexible reaction meshes 3 passed through the inner drive zone / outer separation zone and the inner separation zone, respectively, the residue generated by pyrolysis on the flexible rods 33 was basically scraped off, effectively preventing the adhesion, blockage, coking, and slagging of the raw materials.

[0036] Implementation Plan 4 The temperatures of the four heating shafts 23 were adjusted sequentially from the first to the last: 500℃, 700℃, 700℃, and 500℃. The rotational speeds of the outer drive shaft 24 and the inner drive shaft 21 were both 6 r / min. Waste tire strips with an average length of 300 mm were fed into a stacked chain pyrolysis device with a mesh flexible rod. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed, with a liquid phase yield of 41.7%, of which the target aromatic product accounted for 16.7 wt%, achieving efficient disposal and utilization of waste tire strips. Simultaneously, after the outer and inner flexible reaction meshes 3 passed through the inner drive zone / outer separation zone and the inner separation zone, respectively, the residue generated by pyrolysis on the flexible rods 33 was basically scraped off, effectively preventing the adhesion, blockage, coking, and slagging of the raw materials.

[0037] Implementation Plan 5 The temperatures of the four heating shafts 23 were adjusted sequentially from the first to the last: 400℃, 600℃, 700℃, and 500℃. The rotational speeds of the outer drive shaft 24 and the inner drive shaft 21 were both 8 r / min. Waste PS plastic strips with an average length of 200 mm were fed into a stacked chain pyrolysis device with a mesh flexible rod. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed. The target aromatic product accounted for 73.4% of the liquid phase product, achieving efficient disposal and utilization of easily softened and tightly bound waste PS plastic. Simultaneously, after the outer and inner flexible reaction meshes 3 passed through the inner drive zone / outer separation zone and the inner separation zone, respectively, the residue generated by pyrolysis on the flexible rods 33 was basically scraped off, effectively preventing the raw materials from sticking, clogging, and coking.

[0038] This invention provides a stacked chain pyrolysis device with flexible mesh rods, capable of directly and efficiently pyrolyzing large-sized strip-shaped organic waste that is easily softened and has strong adhesion. The core components are a flexible reaction net with two pairs of flat chains, outer and inner layers, a flexible scraper, and a cleaning mechanism. The outer and inner flexible reaction nets are fixed to a pair of outer and inner flat chains via outer and inner wing rods, respectively. A drive shaft and drive wheel rotate, causing the inner and outer flat chains and their corresponding inner and outer flexible reaction nets to move in opposite directions in a circular motion at a set speed. Each outer and inner wing rod of the flexible reaction net is connected to a flexible rod, which extends inwards towards the sides of the flat chains and in the opposite direction of motion. After the strip-shaped waste enters the sealed shell and falls onto the outer flexible reaction net, it softens as the temperature rises, wraps around and adheres to the flexible rods, and pyrolysis begins. Driven by the outer flat chains, the outer flexible reaction net causes the waste to pass through the reaction zone from the inner separation zone and... The material enters the outer separation zone; in this zone, the flexible scraper intermittently collides with the outer flexible rod, generating elastic high-frequency vibrations. This vibration and scraping action peels off incompletely pyrolyzed raw materials while simultaneously crushing residual coke and waste. The incompletely pyrolyzed material falls onto the inner flexible reaction mesh and moves in the opposite direction under the drive of the inner plate chain until complete pyrolysis. In the inner separation zone, the flexible scraper intermittently collides with the inner flexible rod, peeling off residual coke and waste. In the inner drive zone, the outer flexible rod rotates around the inner drive shaft, increasing the gap and colliding and rubbing against the cleaning mechanism to remove tightly adhered coke and waste. All peeled coke and waste are automatically discharged by gravity. Due to the adoption of the above technical solution, this invention has the following effects: 1. Stable device operation: The flexible rods or their branches are oriented in the opposite direction of the movement to avoid resistance when the flexible rods and / or branches move relative to the flexible scraper / cleaning mechanism; the strip-shaped waste material, as raw material, undergoes pyrolysis on the flexible reaction net. The raw material softens when heated and can spontaneously adhere to the flexible rods, while ensuring a small contact area between the raw material and the flexible rods, making it easy for the pyrolysis residue to spontaneously detach under the intermittent collision action of the flexible scraper; the upper and lower baffles prevent the raw material from falling into the reaction zone and sticking to the inner surface of the sealed shell, effectively preventing blockage of the sealed shell and the chain drive mechanism. At the same time, the gap between the inner flexible rods is smaller than the gap between the outer flexible rods, so that the incompletely pyrolyzed raw material peeled off from the outer flexible reaction net falls smoothly onto the inner flexible reaction net, avoiding material leakage from the flexible reaction net and ensuring smooth and continuous operation of the device.

[0039] 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 and makes the temperature of the inner flexible reaction mesh higher than that of the outer flexible reaction mesh. At the same time, the temperature of each heating shaft can be controlled independently and the speed of the inner and outer flexible reaction meshes can be controlled independently, ensuring that the raw materials continue to pyrolyze at the optimal temperature required by the pyrolysis curve, resulting in high reaction efficiency.

[0040] 3. Effective control of reaction time: Because the raw materials mainly come into contact with the elastic flexible rods, the violent vibrations caused by the flexible rods moving to the outer or inner separation zone hitting the flexible scraper, as well as the violent friction between the flexible rods moving to the inner drive zone and the cleaning mechanism, are difficult to transmit to the flexible rods located in the reaction zone. This avoids 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.

[0041] 4. Convenient reaction control and wide adaptability to 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 and cleaning mechanisms of different sizes and layouts, can be replaced. At the same time, the feed rate, the rotation speed of the inner and outer drive shafts, the pyrolysis temperature and other parameters of the device can be flexibly controlled to adjust the pyrolysis reaction process, and to achieve efficient pyrolysis of different raw materials in a targeted manner. In addition, the flexible rods have high strength while ensuring elasticity, allowing the steel brushes of the cleaning mechanism to directly collide and rub against each other. At the same time, the cleaning mechanism is located at the end of the inner drive area. When the flexible rods rotate around the inner drive shaft, the gap between adjacent flexible rods increases, which can avoid obstructing the cleaning mechanism and thoroughly remove coke and slag that cannot be completely removed by the flexible scraper alone. It is suitable for raw materials that are easily softened and firmly bonded.

[0042] 5. Convenient discharge and automatic slag removal: Unpyrolyzed raw materials located on the outer flexible reaction net can automatically fall into the inner flexible reaction net under the action of flexible scrapers and gravity to continue pyrolysis. At the same time, the lower temperature in the outer separation zone can also solidify the unpyrolyzed raw materials, making it easy to peel them off from the flexible rod. The fixed shafts of the inner and outer separation zones are divided into two coaxial sections. At the same time, additional and independent inner and outer drive zones are set at the beginning and end of the chain drive mechanism, respectively. This allows the drive shaft that spans the opposite end face of the sealed shell to be arranged outside the inner and outer separation zones, ensuring that there are no shafts obstructing the inner and outer separation zones. The remaining coke and slag from pyrolysis will be automatically discharged from the discharge port under the action of flexible scrapers and gravity.

[0043] 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 cleaning mechanism is an elastic steel brush. The wing rod is connected to the flat chain, and the flexible rod is connected to the outer edge of the wing rod, which is convenient for replacement and easy for device maintenance.

[0044] 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 the need for additional pretreatment, stirring, decoking and other equipment. At the same time, the outer flexible reaction net and the inner flexible reaction net of the core device share a chain drive mechanism in a stacked manner. The device is compact, which improves the overall space utilization and makes it easy to expand the processing scale of the device by extending the reaction zone.

[0045] 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 therein. Such 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 pyrolysis apparatus, characterized in that, Includes a sealed outer shell (1), which is a sealed hollow box structure and has an inlet (11), an outlet (12) and an outlet (13). The sealed outer shell (1) is equipped with a chain drive mechanism (2), a flexible reaction net (3) and a scraper mechanism (4). The chain drive mechanism (2) includes a pair of parallel and horizontally placed flat annular outer flat chain (28) and a pair of inner flat chain (29), as well as a drive wheel (25), a driven wheel (26) and a support wheel (27) for supporting and pulling the outer flat chain (28) and the inner flat chain (29), an inner drive shaft (21) and an outer drive shaft (24) for mounting the drive wheel (25) and the driven wheel (26), and a fixed shaft (22) and a heating shaft (23) for mounting the support wheel (27); the inner flat chain (29) is located inside the outer flat chain (28); The flexible reactive mesh (3) is divided into an outer layer and an inner layer, including multiple outer wing rods (31) spaced apart on the two outer plate chains (28) and extending in a vertical outward direction, multiple inner wing rods (32) spaced apart on the two inner plate chains (29) and extending in a vertical outward direction, and a flexible rod (33) with one end connected to the free end of the outer wing rods (31) and the inner wing rods (32) and the other end extending into the area between the two inner plate chains (29); each outer wing rod (31) and inner wing rod (32) is connected to a flexible rod (33); the flexible rods (33) on all the outer wing rods (31) together constitute the outer mesh surface, and the flexible rods (33) on all the inner wing rods (32) together constitute the inner mesh surface; The scraper mechanism (4) includes a plurality of flexible scrapers (43) located in the forward direction of the flexible reaction net (3).

2. The pyrolysis apparatus according to claim 1, characterized in that, The chain drive mechanism (2) is divided into an inner drive zone, an inner separation zone, a reaction zone, an outer separation zone, and an outer drive zone connected in sequence from the beginning to the end. In the upper part of the chain drive mechanism (2), the outer flat chain (28) runs from the beginning to the end, and the inner flat chain (29) runs from the end to the beginning.

3. The pyrolysis apparatus according to claim 2, characterized in that, Two outer plate chains (28) are respectively close to the two opposite end faces of the sealed shell (1), and two inner plate chains (29) are respectively close to the inner sides of the two outer plate chains (28); an inner drive shaft (21) is arranged in the inner drive area, an outer drive shaft (24) is arranged in the outer drive area, one or more pairs of fixed shafts (22) are arranged in the inner separation area and the outer separation area respectively, and multiple heating shafts (23) are arranged in the reaction area; all the inner drive shafts (21), fixed shafts (22), heating shafts (23) and outer drive shafts (24) are arranged in parallel on a plane.

4. The pyrolysis apparatus according to claim 1, characterized in that, The outer wing rods (31) on the two outer plate chains (28) are asymmetrically distributed on the two outer plate chains (28), and the flexible rods (33) on the outer wing rods (31) extend in the opposite direction of the movement of the outer plate chains (28); the inner wing rods (32) on the two inner plate chains (29) are asymmetrically distributed on the two inner plate chains (29), and the flexible rods (33) on the inner wing rods (32) extend in the opposite direction of the movement of the inner plate chains (29); all the outer wing rods (31) are of the same length, all the inner wing rods (32) are of the same length, and the length of the outer wing rods (31) is greater than the length of the inner wing rods (32).

5. The pyrolysis apparatus according to claim 2, characterized in that, The scraper mechanism (4) further includes an inner scraper frame (42) arranged in the inner separation zone and an outer scraper frame (41) arranged in the outer separation zone. The flexible scrapers (43) are spaced apart on the outer scraper frame (41) and the inner scraper frame (42). The outer scraper frame (41) is a flat plate structure and is fixed on the inner surface of the sealed outer shell (1) above the outer separation zone. The inner scraper frame (42) is a flat plate structure and is fixed at both ends on the fixed shaft (22). The plate frame (42) is located between the mesh surfaces of the outer and inner layers; the flexible scrapers (43) are all flat strip-shaped elastic structures; one end of the flexible scraper (43) is fixed to the lower surface of the outer scraper frame (41) and the inner scraper frame (42), and the other end of the flexible scraper fixed to the lower surface of the outer scraper frame (41) can contact the mesh surface of the outer layer; the other end of the flexible scraper fixed to the lower surface of the inner scraper frame (42) can contact the mesh surface of the inner layer.

6. The pyrolysis apparatus according to claim 5, characterized in that, It also includes an upper baffle (5) and a lower baffle (6). The pair of upper baffles (5) and the pair of lower baffles (6) are both planar long thin plates that are perpendicular to the mesh surface, parallel to the running direction of the outer flat plate chain (28) and the inner flat plate chain (29) and symmetrically arranged on both sides. The upper baffle (5) is located above the mesh surface of the outer layer and its two ends are fixed to the opposite end faces of the sealed shell (1). The lower baffle (6) is located between the mesh surfaces of the outer and inner layers and its upper end face is connected to the inner scraper frame (42).

7. The pyrolysis apparatus according to claim 2, characterized in that, It also includes a cleaning mechanism (7), one end of which can contact and clean the flexible rod (33) of the outer layer. The cleaning mechanism (7) is composed of elastic steel brushes and is arranged vertically on the vertical end face of the sealed shell (1) in the inner drive area. One end of the cleaning mechanism (7) is fixed to the inner surface of the sealed shell (1), and the other end contacts the flexible rod (33) that makes a circular motion around the inner drive shaft (21) in the inner drive area.

8. The pyrolysis apparatus according to claim 2, characterized in that, The feed inlet (11) is located on the top of the sealed shell (1) above the inner separation zone of the chain drive mechanism (2), and the feed inlet (11) is connected to the feeding system; there are two discharge outlets (12), located at the bottom of the sealed shell (1) below the inner drive zone and inner separation zone and below the outer separation zone of the chain drive mechanism (2), respectively, and the discharge outlets (12) are connected to the solid collection system; the gas outlet (13) is located on the top of the sealed shell (1) above the reaction zone of the chain drive mechanism (2), and the gas outlet (13) is connected to the separation and condensation system.

9. The pyrolysis apparatus according to claim 1, characterized in that, The heating shaft (23) is circulated with high-temperature flue gas or molten salt; the flexible rod (33) is made of stainless steel, aluminum-titanium alloy, nickel-based alloy or chromium-based alloy steel; the flexible scraper (43) is a steel sheet; the spacing between adjacent flexible rods (33) of the inner flexible reaction net (3) is smaller than the spacing between adjacent flexible rods (33) of the outer flexible reaction net (3); branches can be provided on the flexible rod (33), and the flexible rod (33) and its branches extend in the opposite direction to the movement direction of the outer plate chain (28) and the inner plate chain (29), with the angle between the extension direction and the movement direction being greater than 90° and less than 180°.

10. A pyrolysis method, said pyrolysis method being carried out based on the pyrolysis apparatus according to any one of claims 1-9, characterized in that, The pyrolysis method includes the following steps: S1. Drive the inner drive shaft (21) and the outer drive shaft (24) to rotate. Drive the drive wheel (25) to drive a pair of inner flat plate chains (29) and a pair of outer flat plate chains (28) and their corresponding inner and outer flexible reaction nets (3) to move towards each other at a set speed. At the same time, heat the heating shaft (23) to its respective set temperature. S2. The raw material enters the sealed shell (1) through the feed port (11) and falls on the outer mesh surface of the flexible reaction mesh (3) located in the inner separation zone. Under the heating action of the heating shaft (23), the temperature gradually increases, the raw material softens and sticks to the flexible rod (33) and undergoes pyrolysis. S3, the outer flexible reaction net (3) continues to move along the ring under the drive of the outer plate chain (28), so that the raw material located in the inner separation zone moves to the reaction zone and enters the outer separation zone, the degree of pyrolysis gradually increases, and pyrolysis steam is generated; S4. In the outer separation zone, the flexible scraper (43) located on the outer scraper frame (41) intermittently collides with the flexible rod (33) of the outer flexible reaction net (3), generating elastic high-frequency vibration, peeling off the unpyrolyzed raw materials remaining on the outer flexible reaction net (3), and at the same time crushing the pyrolysis residue coke and waste residue. S5. The unpyrolyzed raw material peeled off from the outer flexible reaction net (3) falls onto the inner flexible reaction net (3); the inner flexible reaction net (3) continues to move in the opposite direction along the ring under the drive of the inner plate chain (28), so that the unpyrolyzed raw material located in the outer separation zone moves to the reaction zone and enters the inner separation zone, continues to generate pyrolysis steam until it is completely pyrolyzed and converted into coke and waste residue. S6. In the inner separation zone, the flexible scraper (43) located on the inner scraper frame (42) intermittently collides with the flexible rod (33) of the inner flexible reaction net (3), generating elastic high-frequency vibration, and peeling off the coke and waste residue remaining on the inner flexible reaction net (3). S7. The outer flexible reaction net (3) moves from the lower half of the chain drive mechanism to the inner drive area along with the outer flat plate chain (28) and rotates around the inner drive shaft (21); during this process, the gap between the flexible rods (33) increases and collides and rubs with the cleaning mechanism (7) to remove the coke and slag that are tightly adhered to the flexible rods (33). S8. The coke and waste fragments stripped from the inner drive zone, inner separation zone and outer separation zone pass through the flexible reaction net (3) under the action of gravity and are automatically discharged from the discharge port (12) below, and collected by the solid collection system; the generated pyrolysis steam 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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