Chain type pyrolysis device with cross flexible rods and pyrolysis method
By designing a chain pyrolysis device with cross-shaped flexible rods, the problems of clogging and coking of strip-shaped waste were solved, achieving stable operation and efficient pyrolysis of the device, reducing pretreatment costs, and improving pyrolysis efficiency and space utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DATANG ENVIRONMENT IND GRP
- Filing Date
- 2026-03-25
- Publication Date
- 2026-05-29
AI Technical Summary
Existing pyrolysis devices are prone to softening, sticking, clogging, and severe coking and slagging when processing strip-shaped organic waste. This results in high pretreatment costs and the devices are also prone to clogging, making it impossible to operate stably for extended periods.
Design a chain pyrolysis device with cross flexible rods, adopting a flexible reaction mesh and scraper structure. Through the cross design of flexible rods and scrapers, the raw materials are automatically separated and coke is cleaned during the pyrolysis process to avoid blockage. Efficient heat transfer is ensured by an independent temperature-controlled heating shaft.
It achieves stable operation of the device, efficient heat transfer, automatic slag removal, reduces pretreatment costs, improves pyrolysis efficiency and space utilization, reduces the generation of harmful substances, has wide adaptability, and has a simple structure that is easy to maintain.
Smart Images
Figure CN122104254A_ABST
Abstract
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 cross flexible rods. 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, resulting in strip-shaped waste. If these strip-shaped wastes are carelessly discarded or landfilled, they not only pollute the environment but also cause 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. Adding additional crushing pretreatment to pulverize the strip-shaped raw materials significantly increases the power consumption of the reaction unit, greatly raising processing costs and resulting in 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 cross flexible rods, so as 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 slag formation, and high pretreatment costs.
[0006] On one hand, the present invention provides a chain pyrolysis device with cross flexible rods, comprising: a sealed shell, two sets of chain drive mechanisms disposed opposite to each other inside the sealed shell, a flexible reaction net fixed between the two sets of chain drive mechanisms, and at least one flexible scraper provided on the top of the flexible reaction net; The sealed outer shell has a feed inlet and an air outlet at the top, and a discharge outlet at the bottom; The chain drive mechanism includes a horizontally placed, flat, annular flat chain. The inner side of the flat chain is provided with a drive wheel, a driven wheel, and a support wheel for supporting or pulling the flat chain. The drive wheel, the driven wheel, and the support wheel are respectively mounted on a drive shaft, a driven shaft, and a fixed shaft. A heating shaft is also provided on one side of the support wheel. The flexible reactive net includes multiple wing rods that are parallel and spaced apart on the two flat chains and extend at an angle relative to each other. Each wing rod is connected to a flexible rod that extends one end into the area between the two flat chains. The ends of the wing rods on the two flat chains are distributed crosswise. The flexible rods extend at an angle in the opposite direction of the movement of the flat chains in the area between the two flat chains. The flexible rods intersect each other to form a mesh surface. The upper region of the chain drive mechanism is divided into a reaction zone, a separation zone, and a drive zone from the beginning to the end. The flexible scraper is a flat strip-shaped elastic element and is arranged at intervals above the separation zone of the chain drive mechanism. One end of the flexible scraper is fixed to the inner surface of the sealed shell and the other end is in contact with the mesh surface.
[0007] Preferably, baffles are provided on both sides of the flexible reaction net. The baffles are long, thin plates that are vertically arranged above the flat chain and are fixedly connected at both ends to the two ends of the sealed shell.
[0008] Preferably, the driven shaft is arranged at the beginning of the reaction zone of the chain drive mechanism, and two driven wheels are fixed at both ends of the driven shaft, which rotate with the two flat chains respectively and restrict the movement position of the flat chains; multiple heating shafts are arranged in the middle of the reaction zone, and two support wheels are installed at both ends of each heating shaft; at least one fixed shaft is arranged in the separation zone, and one support wheel is installed at both ends of each fixed shaft to support the two flat chains respectively; the support wheels are rotatably connected to the heating shaft or the fixed shaft through bearings; a drive shaft is arranged in the drive zone, and two drive wheels are fixed at both ends of the drive shaft to drive the two flat chains to rotate respectively, above the chain drive mechanism, and the running direction of the flat chains is from the beginning to the end.
[0009] Preferably, the feed inlet is located at the top of the sealed shell above the first end of the reaction zone of the chain drive mechanism, and the feed inlet is connected to the feeding system. The width of the feed inlet is smaller than the width of the reaction zone above the chain drive mechanism. The discharge outlet is located at the bottom of the sealed shell below the separation zone of the chain drive mechanism, and the discharge outlet is connected to the solid collection system. The width of the discharge outlet is larger than the width of the separation zone above the chain drive mechanism. The gas outlet is located at the top of the sealed shell at the end of the reaction zone above the chain drive mechanism, and the gas outlet is connected to the separation and condensation system.
[0010] Preferably, high-temperature flue gas or high-temperature molten salt circulates inside the heating shaft; the flexible rod and the flexible scraper are made of stainless steel, aluminum-titanium alloy, nickel-based alloy or chromium-based alloy steel.
[0011] Preferably, the links between the two sets of flat chains at their relative positions are connected by thin rods.
[0012] Preferably, the height of the baffle is less than the gap between the flat chain and the top of the sealed shell, the gap between the baffle and the flat chain is greater than 2 mm, and the distance between the baffle and the wing on the same side is greater than 2 mm.
[0013] Preferably, the flexible rods are arranged at intervals and do not contact each other; each flexible rod is provided with a branch rod, and both the flexible rod and the branch rod extend at an angle opposite to the direction of movement of the flat chain, with the angle between the extension direction and the direction of movement being 90~180°.
[0014] Preferably, the gap between the surface of the flat chain and the inner surface of the sealed shell is greater than 10 mm, the interval between adjacent flexible scrapers is at least 10 mm, the gap between the free end of the wing and the inner surface of the sealed shell is 20~100 mm, and the difference between the spacing between the two flat chains and the axial spacing between each pair of fixed shafts does not exceed 50 mm.
[0015] On the other hand, the present invention also provides a pyrolysis method based on the above-mentioned chain pyrolysis apparatus with cross flexible rods, comprising the following steps: S1. The drive shaft and drive wheel rotate, driving a pair of flat chains and a 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 at the beginning of the reaction zone above 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 rod 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 at the beginning of the reaction zone of the chain transmission mechanism moves with the flexible reaction net to the end of the reaction zone and enters the separation zone, and the degree of pyrolysis gradually increases, generating pyrolysis gas. S4. In the separation zone above the chain drive mechanism, the flexible scraper and the flexible rod of the flexible reaction net intermittently collide, generating elastic high-frequency vibration. Through the intermittent vibration of the flexible rod 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] Compared with the prior art, the present invention has the following beneficial effects: 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 to the flexible rod. At the same time, it ensures that the contact area between the raw material and the flexible rod is small, so that the pyrolysis residue can easily detach spontaneously under the intermittent collision action of the flexible scraper. This prevents the raw material from falling into the reaction zone and sticking to the inner surface of the sealed shell, effectively preventing the sealed shell and chain drive mechanism from clogging, and ensuring that the equipment can operate smoothly and continuously. 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. 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 separation zone hitting the flexible scraper are difficult to be transmitted to the flexible rods 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. 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 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. In addition, the flexible rod has high strength while ensuring elasticity, and can be used for raw materials with strong adhesion. 5. Automatic slag discharge: The flexible rod or its branches are in the opposite direction of the movement to ensure smooth contact and collision between the flexible scraper and the flexible rod and / or branch rod. The fixed shaft is divided into two coaxial sections. At the same time, 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 the flexible scraper and gravity. 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 rod is connected to the flat chain, and the flexible rod is connected to the outer edge of the wing rod, which is convenient to replace and easy to maintain. 7. Compact device and high space utilization: Large-sized strip-shaped raw materials can be directly fed into the pyrolysis device for pyrolysis without crushing into particles, which can save 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. 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
[0017] 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.
[0018] Figure 1 This is a schematic diagram of the main structure of the pyrolysis apparatus of the present invention; Figure 2 This is a top view of the pyrolysis apparatus of the present invention. Figure 3 A schematic diagram of a flexible rod structure that extends at an angle in the opposite direction of motion and has no branches. Figure 4 A schematic diagram of a flexible rod structure that extends at an angle in the opposite direction of the direction of motion and has branch rods. Figure 5 This is a schematic diagram of a flexible rod that extends in a direction perpendicular to the direction of motion and has branch rods.
[0019] 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: Winged rod; 32: Flexible rod; 4: Flexible scraper; 5: Baffle; A: Reaction zone; B: Separation zone; C: Driving zone. Detailed Implementation
[0020] 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.
[0021] 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.
[0022] 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.
[0023] like Figure 1-3 As shown, the present invention provides a chain pyrolysis device with cross flexible rods, comprising: a sealed outer shell 1, the sealed outer shell 1 being a sealed hollow box structure, two sets of chain drive mechanisms 2 being disposed opposite to each other inside the sealed outer shell 1, a flexible reaction net 3 being fixed between the two sets of chain drive mechanisms 2, and at least one flexible scraper 4 being provided on the top of the flexible reaction net 3; the top of the sealed outer shell 1 is provided with a feed inlet 11 and an air outlet 13, and the bottom is provided with a discharge outlet 12.
[0024] The chain drive mechanism 2 includes two sets of relatively horizontally placed flat ring-shaped flat chains 28. The inner side of the flat chain 28 is provided with a drive wheel 27, a driven wheel 22 and a support wheel 24 for supporting or pulling the flat chain 28. The drive wheel 27, the driven wheel 22 and the support wheel 24 are respectively mounted on the drive shaft 26, the driven shaft 21 and the fixed shaft 25. A heating shaft 23 is also provided on one side of the support wheel 24.
[0025] The flexible reactive mesh 3 includes multiple wing rods 31 arranged parallel to each other on two flat chains 28 and extending at an angle to each other. Each wing rod 31 is connected to a flexible rod 32 extending one end into the area between the two flat chains 28. The wing rods 31 on the two flat chains 28 are offset by a certain distance, so that the ends of the wing rods 31 on the two flat chains 28 are alternately distributed, and each wing rod 31 is connected to only one flexible rod 32. The flexible rods 32 extend at an angle in the opposite direction of the movement of the flat chains 28 in the area between the two flat chains 28, so that the flexible rods 32 intersect each other to form a mesh surface.
[0026] The upper region of the chain drive mechanism 2 is divided into a reaction zone A, a separation zone B and a drive zone C from the beginning to the end. The flexible scraper 4 is a flat strip of elastic material and is 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 shell 1 and the other end is in full contact with the mesh surface, which facilitates scraping and removing the adhesive residue remaining on the surface of the flexible reaction mesh 3.
[0027] In this embodiment, baffles 5 are provided on both sides of the flexible reaction net 3. The baffles 5 are long and thin plates. The baffles 5 are arranged vertically above the flat chain 28 and are fixedly connected to the two ends of the sealed shell 1. The baffles 5 can wrap the flexible reaction net 3 to prevent the raw materials from falling in the direction perpendicular to the direction of movement.
[0028] Specifically, the driven shaft 21 is arranged at the beginning of the reaction zone of the chain drive mechanism 2. Two symmetrical driven wheels 22 are fixed at both ends of the driven shaft (21) along the axial direction, which can rotate with the two flat chains 28 respectively and restrict the movement position of the flat chains 28. Multiple heating shafts 23 are arranged in the middle and near the reaction zone A. Two support wheels 24 are installed at both ends of the axial direction of each heating shaft 23. At least one fixed shaft 25 is arranged in the separation zone B. A support wheel 24 is also installed at both ends of the axial direction of each fixed shaft 25, which is used to support the two flat chains 28 respectively. The support wheel 24 is rotatably connected to the heating shaft 23 or the fixed shaft 25 through bearings. A drive shaft 26 is arranged in the drive zone C. Two drive wheels 27 are fixed at both ends of the drive shaft 26, which drive the two flat chains 28 to rotate respectively. Above the chain drive mechanism 2, the running direction of the flat chains 28 is from the beginning (i.e., Figure 1 From the middle left end to the end (i.e.) Figure 1 (Middle right end).
[0029] Two sets of flat chains 28 are arranged close to the front and rear walls of the sealed outer shell 1, respectively. The two adjacent links of the two sets of flat chains 28 are connected by thin rods to enhance the synchronous movement of the two flat chains 28. The axes of all driven shafts 21, heating shafts 23, fixed shafts 25 and drive shafts 26 are arranged in parallel in the same plane. All drive wheels 27, driven wheels 22 and support wheels 24 have the same outer diameter, and the flat chains 28 surround the outer surfaces of all drive wheels 27, driven wheels 22 and support wheels 24 to form an annular area. The driven shafts 21, fixed shafts 25 and drive shafts 26 are solid shafts, while the heating shaft 23 is a hollow pipe, and high-temperature flue gas or high-temperature molten salt flows inside the heating shaft 23. Both the driven shaft 21 and the drive shaft 26 pass through the opposite end faces of the sealed housing 1 and are rotatably connected to the sealed housing 1 via bearings; the drive shaft 26 passes through the end face of one end of the sealed housing 1 and is connected to the drive system, which can drive the drive shaft 26 and the drive wheel 27 to rotate, further driving the flat chain 28 to move; the driven shaft 21 is equipped with a matching tensioning mechanism, which can straighten the flat chain 28; the heating shaft 23 passes through the opposite end faces of the sealed housing 1 and is fixedly connected to them; 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 drive wheel 27, the driven wheel 22, the support wheel 24 and the flat chain 28 and the inner surface of the sealed housing 1 is greater than 10 mm.
[0030] In this embodiment, the feed inlet 11 is located on the top of the sealed shell 1 above the first 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 above 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 above the chain drive mechanism 2. The air outlet 13 is located on the top of the sealed shell 1 at the end of the reaction zone A above the chain drive mechanism 2, and the air outlet 13 is connected to the separation and condensation system.
[0031] In this embodiment, the flexible rods 32 are arranged at intervals and do not contact each other; branch rods are provided on the flexible rods 32, and both the flexible rods 32 and the branch rods extend obliquely in the opposite direction of the movement direction of the flat chain 28, with the angle between the extension direction and the movement direction being 90~180°. The wing rods 31 have the same length, and 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 rods 32 are directly connected to the same plane as the flat chain 28); all the flexible rods 32 and the branch rods intersect each other but do not contact each other (ensuring sufficient support of the raw materials while preventing the vibration of each flexible rod 32 from affecting each other), together forming a mesh surface. The arrangement of the flexible rods 32 and their branches is described in [reference needed]. Figures 3 to 5All flexible rods 32 and flexible scrapers 4 are made of stainless steel, aluminum-titanium alloy, nickel-based alloy, or chromium-based alloy steel.
[0032] In this embodiment, the gap between the surface of the flat chain 28 and the inner surface of the sealed shell 1 is greater than 10 mm, 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 sealed shell 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 a steel sheet, which allows the flexible scraper 4 to fully contact the flexible rod 32, facilitating the scraping and removal of the adhesive residue remaining on the surface of the flexible reaction mesh 3. The difference between the spacing between the two flat chains 28 and the axial spacing of each pair of fixed shafts 25 does not exceed 50 mm.
[0033] In this embodiment, the height of the baffle 5 is less than the gap between the flat chain 28 and the top of the sealed shell 1, and the gap between the baffle 5 and the flat chain 28 is greater than 2 mm; the distance between the baffle 5 and the wing 31 on the same side is greater than 2 mm, so that the baffles 5 on both sides can wrap the flexible reaction net 3 and prevent the raw materials from falling in the direction perpendicular to the direction of movement.
[0034] The following is the preferred embodiment of the present invention. 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 the reaction zone A is 2000 mm; the length of the separation zone B is 400 mm; the length of the 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 the reaction zone A and 1 pair of fixed shafts in the 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 the drive shaft 26 and driven shaft 21 is 80 mm, and the shaft diameter of the 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 top inner surface of the sealed shell 1 is 50 mm. mm; 80 wing rods 31 are evenly spaced at the centerline of each flat chain 28, and the wing rods 31 on both sides of the flat chain 28 are spaced apart; the width of the baffle 5 is 90 mm; the gap width 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 rod 32 is a stainless steel straight rod, the length of the flexible rod 32 is 600 mm, and the angle between the extension direction of the flexible rod 32 and its movement direction is 105°. This embodiment adopts Figure 3The flexible scraper 4 is arranged without branch rods, but is not limited to this material and arrangement. It is a flat, strip-shaped, elastic thin stainless steel sheet, 60 mm long, 10 mm wide, and 0.2 mm thick. Multiple flexible scrapers 4 are evenly arranged on the inner surface of the sealed outer shell 1 above the separation zone B, with 7 distributed longitudinally and 40 distributed transversely. This arrangement allows the flexible scrapers 4 to achieve optimal efficiency in scraping and removing the adhesive residue remaining on the surface of the flexible reaction mesh 3.
[0035] The present invention also provides a pyrolysis method based on the above-mentioned chain pyrolysis device with cross flexible rods, which uses the above-mentioned device to pyrolyze strip-shaped organic waste, including the following steps: S1, drive shaft 26 and drive wheel 27 rotate, driving 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 of the reaction zone A above the chain drive mechanism 2. Under the heating action of the heating shaft 23, the temperature gradually rises, the raw material softens and sticks to the flexible rod 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 of the reaction zone A of the chain transmission mechanism 2 moves with the flexible reaction net 3 to the end of the reaction zone A and enters the separation zone B, the degree of pyrolysis gradually increases, and pyrolysis gas is generated. S4. In the separation zone B above the chain drive mechanism 2, the flexible scraper 4 and the flexible rod 32 of the flexible reaction net 3 intermittently collide, generating elastic high-frequency vibration. Through the intermittent vibration of the flexible rod 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.
[0036] 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.
[0037] Example 1 The temperatures of the five heating shafts 23 were adjusted sequentially from the first to the last: 400℃, 430℃, 460℃, 490℃, and 520℃, with a drive shaft speed of 6 r / min. Waste paper strips with an average length of 300 mm were fed into a chain pyrolysis device with cross-shaped flexible rods. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed. The liquid phase yield was 43.8%, with the target product, L-glucanone, accounting for 10.7 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 during pyrolysis on the flexible rods 32 was essentially scraped off, effectively preventing the adhesion, clogging, and coking of the raw materials.
[0038] Example 2 The temperatures of the five heating shafts 23 were adjusted sequentially from the beginning to the end to 400℃, 450℃, 500℃, 550℃, and 600℃, with a drive shaft speed of 10 r / min. PET waste plastic wire with an average length of 200 mm was fed into a chain pyrolysis device with cross-shaped flexible rods. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed. The liquid phase yield was 37.6%, with the target product benzoic acid yielding 26.5 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 rods 32 was essentially scraped off, effectively preventing the raw materials from sticking, clogging, and coking.
[0039] Example 3 The temperatures of the five heating shafts 23 were adjusted sequentially from the first to the last: 400℃, 500℃, 600℃, 700℃, and 500℃, with a drive shaft speed of 6 r / min. Waste denim processing material with an average length of 200 mm was fed into a chain pyrolysis device with cross-shaped flexible rods. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed, with 39.6% of the non-condensable gas collected, 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 rods 32 was essentially scraped off, effectively preventing the raw materials from sticking, clogging, and coking.
[0040] Example 4 The temperatures of the five heating shafts 23 were adjusted sequentially from the first to the last: 400℃, 550℃, 700℃, 550℃, and 400℃, with a drive shaft speed of 8 r / min. Waste tire strips with an average length of 300 mm were fed into a chain pyrolysis device with cross-shaped flexible rods. After one round of pyrolysis, the pyrolysis gas was collected and rapidly separated and condensed. The liquid phase yield was 42.3%, with the target aromatic hydrocarbon product accounting for 16.8 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 during pyrolysis on the flexible rods 32 was essentially scraped off, effectively preventing the raw materials from sticking, clogging, and coking.
[0041] 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 cross-shaped flexible rods, characterized in that, include: A sealed shell (1) is provided with two sets of chain drive mechanisms (2) arranged opposite to each other inside the sealed shell (1). A flexible reaction net (3) is fixed between the two sets of chain drive mechanisms (2). At least one flexible scraper (4) is provided on the top of the flexible reaction net (3). The sealed outer shell (1) has a feed inlet (11) and an air outlet (13) on both sides of the top, and a discharge outlet (12) on the bottom. The chain drive mechanism (2) includes a flat, ring-shaped flat chain (28) placed horizontally. The inner side of the flat chain (28) is provided with a drive wheel (27), a driven wheel (22), and a support wheel (24) for supporting or pulling the flat chain (28). The drive wheel (27), the driven wheel (22), and the support wheel (24) are respectively mounted on a drive shaft (26), a driven shaft (21), and a fixed shaft (25). A heating shaft (23) is also provided on one side of the support wheel (24). The flexible reactive mesh (3) includes multiple wing rods (31) arranged parallel to each other on two flat chains (28) and extending at an angle to each other. Each wing rod (31) is connected to a flexible rod (32) extending at one end into the area between the two flat chains (28). The ends of the wing rods (31) on the two flat chains (28) are distributed crosswise. The flexible rods (32) extend at an angle in the opposite direction of the movement of the flat chains (28) in the area between the two flat chains (28). The flexible rods (32) intersect each other to form a mesh surface. The upper region of the chain drive mechanism (2) is divided into a reaction zone, a separation zone and a driving zone from the beginning to the end. The flexible scraper (4) is a flat strip-shaped elastic element and is arranged at intervals above the separation zone of the chain drive mechanism (2). One end of the flexible scraper (4) is fixed to the inner surface of the sealed shell (1) and the other end is in contact with the mesh surface.
2. The chain pyrolysis device with cross flexible rods according to claim 1, characterized in that, The flexible reaction net (3) is provided with baffles (5) on both sides. The baffles (5) are long thin plates. The baffles (5) are arranged vertically above the flat chain (28) and are fixedly connected to the two ends of the sealed shell (1).
3. The chain pyrolysis device with cross flexible rods according to claim 1, characterized in that, The driven shaft (21) is arranged at the beginning of the reaction zone of the chain drive mechanism (2). Two driven wheels (22) are fixed at both ends of the driven shaft (21), which rotate with the two flat chains (28) and restrict the movement position of the flat chains (28). Multiple heating shafts (23) are arranged in the middle of the reaction zone, and two support wheels (24) are installed at both ends of the axial direction of each heating shaft (23). At least one fixed shaft (25) is arranged in the separation zone. The two ends are equipped with a support wheel (24) to support the two flat chains (28) respectively; the support wheel (24) is rotatably connected to the heating shaft (23) or the fixed shaft (25) through bearings; a drive shaft (26) is arranged in the drive area, and two drive wheels (27) are fixed at both ends of the drive shaft (26) to drive the two flat chains (28) to rotate respectively. Above the chain transmission mechanism (2), the running direction of the flat chain (28) is from the first end to the last end.
4. The chain pyrolysis device with cross flexible rods according to claim 1, characterized in that, The feed inlet (11) is located on the top of the sealed shell (1) above the first end of the reaction zone of the chain drive mechanism (2). 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 above the chain drive mechanism (2). The discharge outlet (12) is located at the bottom of the sealed shell (1) below the separation zone of the chain drive mechanism (2). The discharge outlet (12) is connected to the solid collection system. The width of the discharge outlet (12) is greater than the width of the separation zone above the chain drive mechanism (2). The air outlet (13) is located on the top of the sealed shell (1) at the end of the reaction zone above the chain drive mechanism (2). The air outlet (13) is connected to the separation and condensation system.
5. The chain pyrolysis device with cross flexible rods according to claim 1, characterized in that, The heating shaft (23) is circulated with high-temperature flue gas or high-temperature molten salt; the flexible rod (32) and the flexible scraper (4) are made of stainless steel, aluminum-titanium alloy, nickel-based alloy or chromium-based alloy steel.
6. The chain pyrolysis apparatus with cross flexible rods according to claim 1, characterized in that, The two sets of flat chains (28) are connected by thin rods at their relative positions.
7. The chain pyrolysis apparatus with cross flexible rods according to claim 2, characterized in that, The height of the baffle (5) is less than the gap between the flat chain (28) and the top of the sealed shell (1), and the gap between the baffle (5) and the flat chain (28) is greater than 2 mm; the distance between the baffle (5) and the wing (31) on the same side is greater than 2 mm.
8. The chain pyrolysis apparatus with cross flexible rods according to claim 1, characterized in that, The flexible rods (32) are arranged at intervals and do not contact each other; branch rods are provided on the flexible rods (32), and the flexible rods (32) and the branch rods extend in the opposite direction of the movement direction of the flat chain (28), with the angle between the extension direction and the movement direction being 90~180°.
9. The chain pyrolysis apparatus with cross flexible rods according to claim 1, characterized in that, The gap between the surface of the flat chain (28) and the inner surface of the sealed shell (1) is greater than 10 mm, 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 sealed shell (1) is 20~100 mm, and 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.
10. A pyrolysis method based on the chain pyrolysis apparatus with cross flexible rods according to any one of claims 1-9, characterized in that, Includes the following steps: S1, drive shaft (26) and drive wheel (27) rotate, driving 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 of the reaction zone above the chain drive mechanism (2). Under the heating action of the heating shaft (23), the temperature gradually rises, the raw material softens and sticks to the flexible rod (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 at the beginning of the reaction zone of the chain transmission mechanism (2) moves with the flexible reaction net (3) to the end of the reaction zone and enters the separation zone, the degree of pyrolysis gradually increases, and pyrolysis gas is generated; S4. In the separation zone above the chain drive mechanism (2), the flexible scraper (4) and the flexible rod (32) of the flexible reaction net (3) collide intermittently, generating elastic high-frequency vibration. Through the intermittent vibration of the flexible rod (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.