A continuous pyrolysis system

Abstract

The application discloses a continuous pyrolysis system, which comprises a material storage tank, a feeding system, a distribution hopper, a weighing feeder, a continuous pyrolysis furnace, an oil gas catalysis and condensation separation unit and a material residue conveying mechanism which are sequentially connected; the feeding system comprises a material conveying screw and an elevator, the material is sent into the material conveying screw through a bottom screw feeding mechanism and is lifted to the distribution hopper by the elevator, the distribution hopper divides the material into two paths which enter two weighing hoppers respectively, the weighing hoppers are supported on a frame through a weighing sensor and cooperate with discharge gate valves to realize metering and discharging, and the material is continuously sent into the feeding port of the continuous pyrolysis furnace through a screw shaft in a feeding conveying pipe; compared with the prior art, the application can realize stable and continuous metering and feeding, improve the uniformity and fullness of cracking heat transfer, reduce the risk of oil gas condensation blockage, realize closed and continuous conveying and heat exchange cooling of the material residue, and is suitable for the continuous and modular application of the pyrolysis device.

Description

Technical Field

[0001] This invention relates to the field of pyrolysis equipment technology, specifically a continuous pyrolysis system. Background Technology

[0002] Waste tires, rubber products, and their composite polymer materials contain a large number of pyrolytic organic components. Pyrolysis can yield resource-based products such as fuel oil, combustible gas, and carbon black, making it an important technological route for solid waste reduction and resource utilization. Existing pyrolysis units mostly adopt batch or semi-continuous processes, which typically suffer from problems such as discontinuous feeding, unstable feed, uneven heating of the pyrolysis reaction, imperfect oil-gas condensation chain, and difficulty in slag discharge. This results in insufficient continuous operation capacity of the system, large fluctuations in product yield, low energy efficiency, and high maintenance costs.

[0003] Firstly, regarding feeding and metering, the common feeding methods in existing technologies are manual feeding combined with belt / screw conveyors or single-compartment screw feeders. Because materials such as tire rubber powder and rubber granules are prone to bridging, arching, and adhesion, single-compartment structures are prone to intermittent feed interruptions when the material level changes or is affected by vibration. Simultaneously, vibrations from the upstream conveying device and the rigid connection of the pipeline will transmit disturbances to the weighing mechanism, causing fluctuations in the weighing signal and making it difficult to achieve stable and continuous metering, thus affecting the material residence time and heat load matching of the pyrolysis furnace.

[0004] Secondly, in the continuous pyrolysis reaction section, existing pyrolysis furnaces mostly adopt a single reaction chamber or a fixed tubular structure. During the process of material being pushed in the tube, it is easy to form agglomerates or local accumulation, resulting in insufficient contact with the high-temperature wall surface, low heat transfer efficiency, uneven temperature field, and the coexistence of local overheating and coking and local underheating and insufficient pyrolysis. In addition, when the overall structure of the screw conveyor is not easy to disassemble and maintain, the maintenance and replacement costs are high and the downtime is long, which is not conducive to continuous industrial operation.

[0005] In terms of oil and gas treatment and condensation collection, existing pyrolysis systems generally suffer from problems such as "single-stage condensation" or "dispersed condensation links": when high-temperature oil and gas directly enter the condenser from the furnace, the pipeline is prone to coking and blockage due to high temperature and entrainment of dust and heavy components; when there is a lack of buffer and primary cooling units, the system pressure fluctuates greatly, the condensation load is concentrated, and it is difficult to achieve staged heat exchange and stable collection.

[0006] Furthermore, regarding the discharge and transportation of solid carbon slag, the carbon slag produced by pyrolysis is hot, dusty, easily dispersed, and has a certain degree of abrasiveness. Current technologies mostly employ open-type discharge or simple screw conveyors for slag discharge, which have poor sealing, insufficient heat dissipation and cooling capacity, posing safety hazards such as high-temperature burns, dust pollution, and unstable downstream conveying. When the slag discharge angle and position are not adjustable, it also reduces the adaptability of the site layout and the convenience of maintenance.

[0007] Therefore, there is an urgent need for a continuous pyrolysis system that can achieve continuous and stable metering and feeding of materials, uniform and efficient heat transfer in the pyrolysis section, continuous connection between oil and gas catalysis and staged cooling and condensation, and closed cooling and conveying of solid slag, so as to improve the continuous operation stability of the unit, product yield and quality, and reduce the operational risks and maintenance costs caused by blockage, coking, weighing fluctuations and high-temperature slag discharge. Summary of the Invention

[0008] The technical problem to be solved by this invention is to overcome the defects of the prior art and provide a continuous pyrolysis system. This system addresses the problems that easily occur in the continuous processing of materials such as waste tire rubber, including discontinuous feeding, unstable metering, easy interference of vibration and pipeline load on weighing, uneven heat transfer in the pyrolysis section leading to insufficient pyrolysis and coking, high-temperature impurities in oil and gas causing back-end condensation blockage, and discontinuous discharge and cooling difficulties of high-temperature carbon slag. The system is designed to construct a complete system of "continuous metering feeding - tubular spiral propulsion pyrolysis - secondary catalysis and staged cooling and condensation collection of oil and gas - closed slag discharge and heat exchange cooling and transportation", thereby achieving continuous, stable and safe operation of the pyrolysis process.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a continuous pyrolysis system, comprising a material storage tank, a feeding system, a distribution hopper, a weighing feeding device, a continuous pyrolysis furnace, an oil and gas catalytic and condensation separation unit, and a slag conveying mechanism arranged sequentially; wherein, the feeding system includes a material conveying screw conveyor and an elevator, the bottom of the material storage tank is provided with a bottom screw feeding mechanism for feeding material into the material conveying screw conveyor, the discharge end of the material conveying screw conveyor is connected to the feed end of the elevator, and the discharge end of the elevator is connected to the distribution hopper; the weighing feeding device includes two weighing bins arranged in parallel, and the two discharge ports of the distribution hopper are respectively connected to the feed ports of the two weighing bins; each weighing bin is supported on a frame by a weighing sensor; the lower end of each weighing bin is connected to a feed conveying pipe via a discharge gate valve, and a screw shaft is provided inside the feed conveying pipe, the screw shaft being driven to rotate by a drive motor to feed material into the feed port of the continuous pyrolysis furnace. The continuous pyrolysis furnace includes a hot blast stove, an upper pyrolysis furnace, a lower pyrolysis furnace, and a material pyrolysis pipe installed within the furnace. The material pyrolysis pipe contains a spiral conveying assembly driven by a geared motor to rotate and continuously advance the material along the axial direction of the material pyrolysis pipe. The continuous pyrolysis furnace has an oil and gas outlet connected to the secondary catalytic and condensation separation unit. It also has a slag discharge port connected to the slag conveying mechanism. The slag conveying mechanism includes a slag conveying pipe sealed to the slag discharge port and an inclined conveying pipe connected to the slag conveying pipe. The inclined conveying pipe contains a spiral conveying component to convey the slag to the discharge end. The secondary catalytic and condensation separation unit includes a catalytic tank, a temporary storage tank, a water-cooled box, and an oil storage tank. The oil and gas outlet is connected to the inlet of the catalytic tank. The outlet of the catalytic tank is connected to the temporary storage tank via a water-cooled overhead pipe. The outlet of the temporary storage tank is connected to a serpentine cooling pipe within the water-cooled box. The condensate from the serpentine cooling pipe enters the oil storage tank via an oil delivery pipe.

[0010] Furthermore, the weighing hopper is provided with at least three legs in the circumferential direction, and each leg is connected to the frame through the weighing sensor. Each weighing hopper is provided with a rotating shaft and a material feeding plate on the rotating shaft. The rotating shaft is driven to rotate by a drive motor located on the top of the weighing hopper.

[0011] Furthermore, a flexible pipe connection assembly is provided at one end of the feed conveying pipe near the continuous pyrolysis furnace. The flexible pipe connection assembly includes a connecting flange, an adjusting flange, and a bellows disposed between the connecting flange and the adjusting flange. The inner diameter of the flange hole of the adjusting flange is larger than the outer diameter of the feed conveying pipe, so that a circumferential gap is formed between the adjusting flange and the feed conveying pipe.

[0012] Furthermore, the material pyrolysis tube of the continuous pyrolysis furnace includes at least a material pyrolysis tube one and a material pyrolysis tube two arranged in parallel vertically. One end of the material pyrolysis tube one and the material pyrolysis tube two are connected by a short pipe. The other end of the material pyrolysis tube one is provided with the feed inlet and the oil and gas outlet, and the other end of the material pyrolysis tube two is provided with the slag discharge port.

[0013] Furthermore, the spiral conveying assembly includes several spiral conveying units that are detachably connected along the axial direction; each spiral conveying unit includes a spiral connecting shaft and a propeller blade fixed on the spiral connecting shaft, and adjacent spiral connecting shafts are detachably connected by a female connector and a male connector through a pin; the female connector is provided with a limiting platform, and the male connector is provided with a positioning platform, and the limiting platform and the positioning platform cooperate to limit the docking depth and improve coaxiality.

[0014] Furthermore, each spiral conveying unit also includes a material feeding reinforcement structure disposed between the spiral connecting shaft and the propeller blade. The material feeding reinforcement structure includes a reinforcing material feeding plate and an auxiliary plate. One end of the auxiliary plate is fixedly connected to the spiral connecting shaft, and the other end is fixedly connected to the propeller blade.

[0015] Furthermore, the pyrolysis furnace is provided with a circulating flue gas outlet, which is connected to the air inlet of the hot blast stove via a circulating fan.

[0016] Furthermore, the outlet end of the slag conveying pipe is connected to a guide cover, and the guide cover is connected to the inlet end of the inclined conveying pipe through a connecting guide pipe; a heat dissipation cover is provided on the outer periphery of the inclined conveying pipe and forms a heat dissipation cavity with the inclined conveying pipe, and the heat dissipation cavity is provided with a water inlet and a water outlet for connecting with a cooling circulation system to exchange heat and cool down the slag conveyed in the inclined conveying pipe.

[0017] Furthermore, the inclined conveying pipe is mounted on a movable inclined support frame, and the lower end of the inclined support frame is equipped with a support wheel with brakes to realize the position adjustment and positioning of the inclined conveying pipe.

[0018] The material distribution hopper is located above the discharge end of the elevator of the feeding system. The material distribution hopper has two discharge ports that correspond to the two weighing hoppers respectively.

[0019] The oil and gas secondary catalytic and condensation separation unit includes a catalytic tank connected to the oil and gas outlet and a condensation separation device connected to the catalytic tank.

[0020] Furthermore, a continuous pyrolysis method includes the following steps:

[0021] S1. The crushed tire rubber and other materials are put into the material storage box. The bottom screw feeding mechanism at the bottom of the material storage box feeds the material into the material conveying screw conveyor. Then, the elevator lifts the material to the distribution hopper, and the distribution hopper divides the material into two paths.

[0022] S2. The two materials are fed into the two weighing bins of the weighing feeder, and the weighing sensor is used to weigh and measure each weighing bin. After the weighing reaches the set condition, the material is discharged into the feed conveying pipe through the discharge gate valve.

[0023] S3. Drive the spiral shaft in the feed conveying pipe to rotate, continuously feed the material into the feed port of the continuous pyrolysis furnace, and drive the spiral conveying component in the material pyrolysis pipe to rotate, so that the material can move continuously along the axial direction of the material pyrolysis pipe and be heated and pyrolyzed in the furnace to generate oil, gas and solid slag.

[0024] S4. The oil and gas generated by cracking are introduced into the catalytic tank through the oil and gas outlet for secondary catalysis and preliminary gas-liquid separation. The outlet of the catalytic tank is connected to the temporary storage tank through the water-cooled overhead pipe to achieve buffering and initial cooling. The outlet of the temporary storage tank is connected to the serpentine cooling pipe in the water-cooled box to achieve secondary cooling and condensation. The condensed products are collected in the oil storage tank through the oil pipeline, thereby completing the cooling and collection of oil and gas.

[0025] S5. The solid slag produced by pyrolysis is fed into the slag conveying mechanism through the slag discharge port, and then conveyed to the discharge end through the slag conveying pipe and the spiral conveying component in the inclined conveying pipe.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. The continuous pyrolysis system of the present invention adopts a continuous link at the material supply end: “bottom screw feeding of storage tank - screw conveyor - elevator lifting - two-way diversion of material hopper - dual weighing bin metering”, so as to realize the stable and continuous entry of material into the pyrolysis furnace; the weighing bin is supported by a weighing sensor for metering, and the material is disturbed by the material feeding mechanism in the bin, which effectively suppresses the material interruption caused by the easy bridging and arching of materials such as tire rubber powder, thereby ensuring the continuity of feeding and the repeatability of metering control.

[0028] 2. At the coupling point between the feeding pipeline and the weighing system, the feeding conveying pipe is equipped with a corrugated flexible connection and flange gap structure, which can absorb installation deviations and thermal expansion stress, and isolate the influence of upstream conveying vibration on the weighing mechanism, significantly reducing weighing signal fluctuations and improving the accuracy and stability of continuous metering feeding; at the same time, the screw shaft forced conveying method can avoid material pulsation, ensuring that the feed amount and residence time of the pyrolysis furnace are more controllable and improving the stability of the operating conditions.

[0029] 3. In the pyrolysis reaction section, the material is continuously propelled axially by the screw conveyor assembly inside the pyrolysis tube. The propeller blades and the material-reinforcing structure work together to convey, tumble, and disperse the material, ensuring full contact between the material and the high-temperature tube wall and enhancing heat transfer. This reduces the problems of local overheating and coking caused by uneven temperature field and insufficient pyrolysis, thereby improving pyrolysis efficiency and product yield. The screw conveyor assembly adopts a detachable modular unit connection structure, which can be disassembled and reassembled in sections during maintenance and replacement, reducing maintenance difficulty and downtime, and is suitable for long-term continuous operation.

[0030] 4. At the product processing end, after secondary catalysis and initial gas-liquid separation in the catalytic converter, the oil and gas are sequentially pre-cooled by water-cooled overhead pipes, buffered and initially cooled in a temporary storage tank, and deeply condensed by serpentine cooling pipes in a water-cooled box. The condensed products are collected in the oil storage tank via the oil pipeline, forming a continuous processing link of "catalysis - pre-cooling - buffering - staged heat exchange - condensation and collection". This can effectively distribute the condensation load, reduce the risk of coking and blockage, and improve the collection stability. Solid slag is continuously discharged by a closed slag conveying pipe and an inclined conveying pipe, and can be cooled by heat exchange in the heat dissipation chamber, reducing dust leakage and high temperature safety hazards. The overall system has a compact structure and a continuous process, which is convenient for modular integration and application. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0032] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0033] Figure 3 This is a system block diagram of the present invention;

[0034] Figure 4 This is a schematic diagram of the structure of the present invention;

[0035] Figure 5 The isometric view of the catalytic converter is removed in this invention;

[0036] Figure 6 This is a schematic diagram of the structure for removing the upper furnace shell of the pyrolysis furnace according to the present invention;

[0037] Figure 7 This is a schematic diagram showing the removal of the internal structure of the pyrolysis tube in this invention;

[0038] Figure 8 This is a schematic diagram of the spiral conveyor assembly structure of the present invention;

[0039] Figure 9 This is an enlarged structural diagram of point A in the present invention;

[0040] Figure 10 This is a schematic diagram of the structure of a single spiral conveyor unit of the present invention;

[0041] Figure 11 This is a schematic diagram of the male connector structure of the present invention;

[0042] Figure 12 This is a schematic diagram of the female connector structure of the present invention;

[0043] Figure 13 This is a front view structural diagram of the present invention;

[0044] Figure 14 This is a schematic diagram of the overall cross-sectional structure of the present invention;

[0045] Figure 15 This is a schematic diagram of the cross-sectional structure of the weighing silo of the present invention;

[0046] Figure 16 This is a schematic diagram of the pipe connection assembly structure of the present invention;

[0047] Figure 17 This is a schematic diagram of the overall structure of the present invention;

[0048] Figure 18 This is a top view of the structure of the present invention;

[0049] Figure 19 This is a schematic diagram of the cross-sectional structure of the inclined conveying pipe of the present invention;

[0050] Figure 20 This is a partially enlarged structural diagram of the inclined conveying pipe of the present invention.

[0051] In the diagram: 1. Pyrolysis furnace, 101. Circulating fan, 102. Burner, 103. Hot blast stove, 104. Lower pyrolysis furnace, 105. Gear motor, 106. Upper pyrolysis furnace, 107. Oil and gas outlet, 108. Feed inlet, 109. Slag discharge outlet, 1010. Screw conveyor, 1011. Circulating flue gas outlet, 1012. Furnace inlet, 1013. Material pyrolysis pipe II, 1014. Material pyrolysis pipe I, 1015. Fixed frame, 1016. Short pipe, 1017. Screw conveyor assembly, 1018. Propeller blade, 1019. Propeller reinforcing blade. 1020 Reinforced feeding plate, 1021 Auxiliary plate, 1022 Connecting pin hole, 1023 Spiral connecting shaft, 1024 Female connector, 1025 Male connector, 1026 Rectangular mating part, 1027 Positioning platform, 1028 Connecting hole, 1029 Cylindrical connecting part, 1030 Limiting platform, 2 Material and slag conveying mechanism, 3 Weighing feeding device, 201 Gear motor, 202 Feeding and conveying pipe, 203 Pipeline flexible connection assembly, 204 Weighing sensor, 205 Support leg, 206 Weighing hopper, 207 Gear motor Machine 2, 208 Inlet Gate Valve, 209 Frame, 2010 Screw Shaft, 2011 Discharge Gate Valve, 2012 Connecting Flange, 2013 Adjusting Flange, 2014 Bellows, 2015 Screw, 2016 Rotary Shaft, 2017 Pin, 2018 Material Dispensing Plate, 2019 Fixed Flange, 2020 Center Hole, 2021 Clearance, 301 Material Conveying Pipe, 302 Material Guide Cover, 303 Inclined Conveying Pipe, 304 Water Inlet, 305 Heat Dissipation Cover, 306 Inclined Support Frame, 307 Support Wheel, 308 Water Outlet 309 Discharge pipe, 3010 Cover plate, 3011 Temperature sensor, 3012 Inspection cover, 3013 Gear motor III, 3014 Gear motor IV, 3015 Spiral shaft, 3016 Hollow shaft, 3017 Spiral blade, 3018 Support fan-shaped plate, 3019 Connecting guide pipe, 3020 Bracket, 3021 Flow hole, 4 Distributor hopper, 5 Water-cooled header pipe, 6 Oil and gas temporary storage and cooling tank, 7 Material storage box, 8 Material conveying screw conveyor, 9 Elevator, 10 Belt elevator, 11 Slag storage tank, 12 Catalytic tank. Detailed Implementation

[0052] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0053] Please see Figure 1-20The present invention provides a technical solution: a continuous pyrolysis system, comprising a material storage tank 7, a feeding system, a distributing hopper 4, a weighing feeding device 3, a continuous pyrolysis furnace 1, an oil and gas catalytic and condensation separation unit, and a slag conveying mechanism arranged in sequence.

[0054] The material storage box 7 is used to temporarily store crushed materials such as tire rubber. The bottom of the material storage box 7 is equipped with a bottom spiral feeding mechanism to feed the material into the feeding system. The feeding system includes a material conveying screw conveyor 8 and an elevator 9. The discharge end of the material conveying screw conveyor 8 is connected to the feed end of the elevator 9, and the discharge end of the elevator 9 is connected to the distribution hopper 4. The distribution hopper 4 is located above the discharge end of the elevator 9 and has two discharge ports to divide the material into two output paths.

[0055] The continuous pyrolysis furnace includes a hot blast stove 103, an upper pyrolysis furnace 106, a lower pyrolysis furnace 104, a material pyrolysis pipe, and a screw conveyor assembly 1017. The outlet of the hot blast stove 103 is connected to the furnace opening 1012 of the lower pyrolysis furnace 104. The hot blast stove 103 is composed of a furnace lining, an inner furnace chamber, an outer furnace chamber, an insulation layer, and lifting lugs. The furnace lining is made of refractory material, the inner furnace chamber is made of 310S stainless steel, and the insulation layer is made of aluminum silicate fiber blanket. The lower pyrolysis furnace 104 and the upper pyrolysis furnace 106 are fixedly connected by bolts to form an integral furnace structure, forming a continuous high-temperature reaction chamber inside.

[0056] The material pyrolysis pipe is installed in the upper pyrolysis furnace 106. One end of the material pyrolysis pipe is provided with a feed inlet 108, and the other end is provided with an oil and gas outlet 107, which is connected to the feed end of the catalytic tank. The screw conveyor assembly 1017 is installed inside the material pyrolysis pipe and is used to drive the material to move axially, so that the material is gradually pyrolyzed to generate oil and gas in the heated environment. A geared motor 105 is provided outside the upper pyrolysis furnace 106. Its output shaft is connected to the screw shaft of the screw conveyor assembly 1017 through a flange, driving the screw conveyor assembly 1017 to rotate and realize the continuous conveying and mixing of materials.

[0057] The screw conveyor assembly 1017 consists of several screw conveyor units. Each screw conveyor unit includes a screw connecting shaft 1023, a propeller blade 1018, and a propeller-reinforced material-pushing plate 1019 disposed between the two. Each screw connecting shaft 1023 is connected to a male connector 1025 via a female connector 1024. The female connector 1024 and the male connector 1025 are respectively disposed at the ends of adjacent screw connecting shafts. After the male connector 1025 is inserted into the female connector 1024, it is connected by a pin to form a reliable detachable structure. This modular design facilitates transportation and installation, and can effectively reduce the risk of thermal deformation of the overall shaft in high-temperature operating environments.

[0058] The propeller-reinforced material-pushing plate 1019 includes a reinforcing material-pushing plate 1020 and an auxiliary plate 1021. One end of the auxiliary plate 1021 is welded to the screw connecting shaft 1023, and the other end is welded to the propeller blade 1018. It not only provides support and reinforcement but also agitates and stirs the material during its movement, thereby enhancing heat exchange and improving pyrolysis. The reinforcing material-pushing plate 1020 is vertically welded to the side of the auxiliary plate 1021 to further enhance the material turning and mixing, making the material heat more evenly and avoiding local coking or overheating. This structure enables the screw conveyor assembly to maintain overall strength and shape stability under high-temperature operation.

[0059] One end of the male connector 1025 is provided with a rectangular mating part 1026, and the other end is fixed on the spiral connecting shaft 1023. One end of the spiral connecting shaft 1023 is provided with a connecting pin hole 1022. Both the male connector 1025 and the female connector 1024 are provided with connecting holes 1028 corresponding to the connecting pin hole 1022. After the rectangular mating part 1026 is inserted into the through hole of the female connector 1024, the connecting pin passes through the connecting hole 1028 and the connecting pin hole 1022 to form a precise mating. This structure has clear positioning and is easy to disassemble and assemble during assembly, and can withstand the transmission torque under high temperature environment. The rectangular mating part ensures the coaxiality of the spiral conveying assembly, prevents torsional deviation or vibration, and improves the transmission stability of the system.

[0060] The female connector 1024 is provided with a cylindrical connecting part 1029 and a limiting platform 1030. The cylindrical connecting part 1029 is inserted into the helical connecting shaft 1023 to form a tight fit. The limiting platform 1030 is used to control the insertion depth to ensure accurate assembly. The connecting hole 1028 is opened on the cylindrical connecting part 1029. The male connector 1025 is provided with a positioning platform 1027 to limit the insertion depth of the rectangular mating part 1026, so that the connecting holes of the female connector 1024 and the male connector 1025 can accurately correspond, and the pin shaft can be smoothly assembled. This limiting and positioning structure can prevent assembly deviation and eliminate axial displacement, thereby improving the reliability and service life of the helical drive assembly.

[0061] The material pyrolysis tubes can be arranged in multiple stages. In a preferred structure, a material pyrolysis tube 1014 and a material pyrolysis tube 2013 are set up, arranged in parallel vertically. One end is connected through a short pipe 1016, and the other end is respectively provided with a feed inlet 108 and an oil and gas outlet 107. The material pyrolysis tube 1014 is connected to the discharge port of the feeder. After the material is heated and pyrolyzed once in the upper pyrolysis tube, it enters the lower pyrolysis tube 2013 through the short pipe 1016 to continue pyrolysis, completing the secondary heating and segmented reaction process. Through the design of the parallel double pyrolysis tubes, the residence time of the material can be extended in a limited space, improving the completeness of pyrolysis, while reducing the furnace length and floor area.

[0062] The other end of the material pyrolysis pipe 1013 is provided with a slag discharge port 109. A screw conveyor 1010 is installed below the slag discharge port, and its feed port is connected to the slag discharge port 109 for continuous discharge of carbon slag produced after pyrolysis. The screw conveyor 1010 can be connected to the downstream cooling system or the closed slag storage bin to realize automatic slag discharge and closed collection, ensure continuous operation and avoid material blockage.

[0063] Material pyrolysis tube 1014 and material pyrolysis tube 2 1013 are fixed by a fixed frame 1015, which is connected to the upper pyrolysis furnace 106 to maintain the stability of the pyrolysis tubes during high-temperature operation. The rotation speed of the screw conveyor assembly is adjusted by a frequency conversion control system to adapt to the characteristics of different materials and the pyrolysis reaction rate, thereby achieving precise control. A temperature sensor and controller are installed between the hot air furnace and the pyrolysis furnace body to monitor the hot air temperature in real time and automatically adjust the heating power of the burner, thereby ensuring the stability and controllability of the pyrolysis temperature and preventing overheating or temperature fluctuations.

[0064] A burner 102 is installed at one end of the hot blast stove 103, which can use cracked oil or externally supplied fuel; a circulating flue gas outlet 1011 is installed on one side of the pyrolysis furnace 104, and the circulating flue gas outlet is connected to a circulating fan 101 through a pipeline. The air outlet of the circulating fan 101 returns to the air inlet of the hot blast stove 103 through a pipeline, forming a flue gas circulation heating system. This system realizes energy recovery through flue gas reuse, reduces fuel consumption, and achieves energy-saving and environmental protection effects by setting up a flue gas purification system to ensure that a small amount of exhaust gas is discharged in compliance with standards.

[0065] The weighing feeding device includes a frame 209 and a weighing hopper 206. The weighing hopper 206 is installed on the frame 209 and is used to weigh and measure the material before it enters the pyrolysis equipment and to transport it downstream. The lower part of the weighing hopper 206 is designed with a conical structure so that the material can converge at the lower outlet under the action of gravity, reducing material stagnation and forming a stable feeding channel. Several support legs 205 are arranged in the circumferential direction of the weighing hopper 206. Each support leg 205 is connected to the frame 209 through a weighing sensor 204, so that the load of the weighing hopper 206 can be collected by the weighing sensor 204, thereby realizing the detection and measurement of the weight of the material in the hopper.

[0066] To further ensure the stability of the weighing signal, preferably, the feed conveying pipe 202 is provided with a support / limiting structure on the side near the weighing hopper 206, so that the weight of the feed conveying pipe 202 and the load of the external pipeline are not transmitted to the weighing sensor 204 through the weighing hopper 206; for example, pipe clamps, brackets or elastic supports can be provided on the frame 209 to support the feed conveying pipe 202, and an installation margin is reserved between the feed conveying pipe 202 and the frame 209 to accommodate thermal expansion and contraction and equipment displacement; in addition, the lead wires of the weighing sensor 204 and the auxiliary pipelines related to the weighing hopper 206 preferably adopt flexible routing or leave bending margin to avoid the cables / pipelines exerting a pulling force on the weighing hopper 206, so that the weighing hopper 206 is closer to a relatively independent weighing state, improving the stability of the weighing process and the weighing accuracy.

[0067] The lower outlet of the weighing hopper 206 is connected to the feed conveying pipe 202 through the discharge gate valve 2011. The discharge gate valve 2011 is used to control the opening and closing of the weighing hopper 206 and the feed conveying pipe 202. A screw shaft 2010 is installed inside the feed conveying pipe 202. A geared motor 201 is installed at one end of the feed conveying pipe 202. The output shaft of the geared motor 201 is connected to the screw shaft 2010 to drive the screw shaft 2010 to rotate and realize the axial conveying of the material. The material is pushed along the feed conveying pipe 202 to the feed port of the pyrolysis equipment, thereby forming a continuous and controllable feeding channel.

[0068] To reduce the impact of vibration, load, or installation deviations on the weighing link of downstream pyrolysis equipment, and to ensure a sealed connection with the downstream feed inlet, a flexible pipe connection assembly 203 is installed at the end of the feed conveying pipe 202 furthest from the weighing silo 206. The flexible pipe connection assembly 203 includes a connecting flange 2012, an adjusting flange 2013, and a bellows pipe 2014 positioned between them. The connecting flange 2012 is fixed to the feed conveying pipe 202, the adjusting flange 2013 connects to the feed inlet of the pyrolysis equipment, and the bellows pipe 2014 provides flexible support between the connecting flange 2012 and the adjusting flange 2013. This compensates for installation errors within the axial, radial, and certain angular range and provides a buffer against vibration. Furthermore, the inner diameter of the flange hole of the adjusting flange 2013 is larger than the outer diameter of the feed conveying pipe 202, creating a gap 2021 between the adjusting flange 2013 and the feed conveying pipe 202. Structurally, this avoids rigid contact between the adjusting flange 2013 and the feed conveying pipe 202, forming a combination of "flexible connection + non-contact isolation" at the connection between the feed conveying pipe 202 and the pyrolysis equipment side. This reduces the transmission of vibration and external load to the weighing hopper 206 through a rigid path, improving the stability and weighing accuracy of the weighing process.

[0069] Regarding the sealing connection, both ends of the bellows 2014 form a sealed connection with the connecting flange 2012 and the regulating flange 2013 respectively. A heat-resistant sealing gasket, sealing ring or welding / clamping can be installed between the regulating flange 2013 and the feed inlet end face of the downstream pyrolysis equipment to achieve a seal, thereby forming a closed channel from the feed conveying pipe 202 to the downstream feed inlet. It should be noted that the gap 2021 is set between the regulating flange 2013 and the feed conveying pipe 202. Its function is to cut off the rigid contact vibration transmission path and provide non-contact isolation. The gap 2021 does not serve as a material flow channel, nor does it constitute a leakage channel.

[0070] In one embodiment, the connecting flange 2012 and the adjusting flange 2013 are connected by a bellows 2014. A screw 2015 is provided circumferentially on both the connecting flange 2012 and the adjusting flange 2013, with both ends of the screw 2015 connected to the connecting flange 2012 and the adjusting flange 2013 respectively. Specifically, both ends of the screw 2015 are respectively inserted into grooves in the circumferential direction of the connecting flange 2012 and the adjusting flange 2013. After adjusting the relative positions, the screws are tightened with nuts to achieve rapid assembly of the connecting parts, fine adjustment of the circumferential position, and reliable fastening. This ensures that the bellows 2014 is stably clamped between the two flanges and meets the sealing and strength requirements.

[0071] To improve the material feeding state in the weighing hopper 206 and suppress bridging and arching, a rotating shaft 2016 is installed inside the weighing hopper 206. A material-pulling plate 2018 is installed on the rotating shaft 2016. A geared motor 207 is installed at the top of the weighing hopper 206 to drive the rotating shaft 2016 to rotate. When the geared motor 207 drives the rotating shaft 2016 to rotate, the material-pulling plate 2018 rotates with the rotating shaft 2016, which disturbs, turns over and breaks the arches of the material in the hopper. This keeps the material in a relatively loose pile state and promotes the continuous collection of the material to the lower outlet. This works in conjunction with the continuous conveying of the screw shaft 2010 to achieve continuous and stable weighing feeding.

[0072] In one embodiment, a feed gate valve 208 is provided on one side of the upper end of the weighing silo 206. The feed gate valve 208 is used to control the entry and exit of upstream materials into the weighing silo 206. Through the cooperation of the feed gate valve 208 and the discharge gate valve 2011, the weighing silo 206 can be switched between the feeding stage and the weighing stage: when feeding is required, the feed gate valve 208 is opened to allow materials to enter the weighing silo 206; when stable weighing or feeding control is required, the feed gate valve 208 is closed to reduce the influence of upstream fluctuations on the weighing signal, and the discharge gate valve 2011 is opened according to the feeding requirements to allow materials to enter the feed conveying pipe 202. The screw shaft 2010 continuously feeds the materials into the feed port of the pyrolysis equipment, thereby achieving stable metering and continuous feeding.

[0073] In one embodiment, a central hole 2020 is provided in the center of the weighing hopper 206, and a fixed flange 2019 is provided at the upper end of the central hole 2020. A second geared motor 207 is mounted on the fixed flange 2019, and a rotating shaft 2016 passes through the central hole 2020, so that the rotating shaft 2016 is arranged in the central area of ​​the hopper to obtain a more uniform material feeding coverage. The output shaft of the second geared motor 207 is connected to the rotating shaft 2016 through a pin 2017 to realize torque transmission and convenient assembly and disassembly. The feeding plate 2018 is arranged along the axial direction of the rotating shaft 2016, so that the feeding action covers different height areas of the weighing hopper 206, further improving the arch breaking and guiding effect, which is suitable for material conditions with uneven particles or certain viscosity.

[0074] In one optional embodiment, the feed gate valve 208 and the discharge gate valve 2011 can be any of hydraulically driven, pneumatically driven, or electrically driven. Hydraulic drive can be used in scenarios requiring greater driving force and anti-jamming capability, pneumatic drive is suitable for scenarios with frequent actions and fast response, and electric drive is convenient for linkage control with weighing control logic. In practical applications, the feed gate valve 208 and the discharge gate valve 2011 can adopt the same driving method, or they can be selected separately according to the action frequency, thrust requirements, and on-site energy conditions.

[0075] In another embodiment, two weighing silos 206 can be configured, with the two weighing silos 206 installed side by side on the frame 209. By coordinating and controlling the feeding and discharging cycles of the two weighing silos 206, a replacement feeding and alternating feeding operation mode can be realized. When one weighing silo 206 is in the feeding or weighing stabilization stage, the other weighing silo 206 is in the feeding and conveying stage. This improves the continuity and processing efficiency of the overall feeding while ensuring the independent weighing of each silo, and meets the working conditions of the continuous pyrolysis equipment for stable feeding.

[0076] Furthermore, without departing from the overall concept of this invention, the material and inner surface form of the weighing hopper 206, the number of support legs 205 and the form of the weighing sensor 204, the pitch and blade structure of the screw shaft 2010, the material and temperature resistance rating of the bellows 2014, the fastening form of the screw 2015, and the structure and arrangement of the feeding plate 2018 can all be selected and adjusted according to the material characteristics and on-site working conditions. As long as the relatively independent weighing of the weighing hopper 206, the isolation and buffering of downstream vibration loads, and the improvement of the material feeding state can be achieved, it should fall within the protection scope of this invention.

[0077] The slag conveying mechanism includes a slag conveying pipe 301 and an inclined conveying pipe 303. The inlet end of the slag conveying pipe 301 is provided with a flange structure for sealing connection with the slag discharge port of the pyrolysis equipment. The outlet end of the slag conveying pipe 301 is connected to a guide cover 302. The outlet of the guide cover 302 is connected to the feed end of the inclined conveying pipe 303 through a connecting guide pipe 3019, thereby forming a continuous transition channel from the slag discharge port to the inclined conveying section. The discharge end of the inclined conveying pipe 303 is provided with a discharge pipe 309 for docking with downstream cooling devices, storage silos, or transfer containers. The inclined conveying pipe 303 includes at least two sections. The discharge end of the first section of two adjacent sections is connected to the feed end of the second section in sequence to extend the conveying distance and facilitate segmented installation and maintenance.

[0078] A spiral shaft 3015 is installed inside the slag conveying pipe 301. A geared motor 3013 is installed at one end of the slag conveying pipe 301. The output shaft of the geared motor 3013 is connected to the spiral shaft 3015 and is used to actively push the high-temperature slag entering the slag conveying pipe 301. A spiral conveying assembly is installed inside the inclined conveying pipe 303. The spiral conveying assembly includes a hollow shaft 3016 and spiral blades 3017 disposed on the outer periphery of the hollow shaft 3016. A driving device is installed at one end of the inclined conveying pipe 303. The driving device is a geared motor 3014. The output shaft of the geared motor 3014 is connected to the hollow shaft 3016 and is used to drive the spiral blades 3017 to rotate inside the inclined conveying pipe 303, thereby continuously pushing the slag along the inclined direction to the discharge end and discharging it through the discharge pipe 309.

[0079] The lower part of the inclined conveying pipe 303 has a semi-circular structure, and the upper part has a rectangular structure. A cover plate 3010 is provided on the upper surface of the inclined conveying pipe 303. The cover plate 3010 is detachably fixed to the inclined conveying pipe 303 by fasteners so as to form a cover during operation and to be disassembled and opened during maintenance, thereby facilitating the inspection and cleaning of the spiral blades 3017, accumulated material and wear condition inside the inclined conveying pipe 303.

[0080] To reduce material leakage during slag conveying and achieve relatively closed conveying, a high-temperature resistant sealing gasket can be installed between the flange structure and the slag discharge port, and a sealed connection can be achieved by tightening with fasteners; a sealing strip / sealing ring can be installed at the circumferential contact point between the cover plate and the upper opening of the inclined conveying pipe, and the cover plate can be tightened and fixed with fasteners; at the drive end or shaft end of the screw conveyor assembly, a shaft sealing structure such as a packing seal, labyrinth seal, or equivalent dustproof seal structure can be installed to reduce dust or gas leakage from the shaft end; through the above sealing combinations, the airtightness of the conveying channel can be improved without affecting maintenance and disassembly.

[0081] A heat dissipation shroud 305 is provided on the outer periphery of the inclined conveying pipe 303. The heat dissipation shroud 305 and the inclined conveying pipe 303 form a heat dissipation cavity. The heat dissipation cavity is provided with an inlet 304 and an outlet 308 for connecting to the cooling circulation system, so that the cooling medium flows in the heat dissipation cavity and exchanges heat with the outer wall of the inclined conveying pipe 303, thereby indirectly cooling / cooling down the material slag during the conveying process. Supporting fan-shaped plates 3018 are provided at intervals along the length direction of the inclined conveying pipe 303 in the heat dissipation cavity. The supporting fan-shaped plates 3018 are provided with flow holes 3021 to support and position the heat dissipation shroud 305 and ensure that the cooling medium flows continuously in the heat dissipation cavity.

[0082] The heat dissipation cavity formed between the heat dissipation shroud and the outer wall of the inclined conveying pipe is connected to the external cooling circulation system through the water inlet and outlet. The cooling medium can be water or other coolant. After entering the heat dissipation cavity, the cooling medium flows along the heat dissipation cavity and exchanges heat with the outer wall of the inclined conveying pipe, thereby carrying away the heat transferred by the slag in the inclined conveying pipe. After being discharged through the water outlet, the cooling medium returns to the external heat exchange equipment or cooling device to achieve circulating cooling.

[0083] An inclined support frame 306 is provided below the inclined conveying pipe 303. Support wheels 307 are provided at the four corners of the lower end of the inclined support frame 306. The support wheels 307 are used to move the inclined support frame 306 along the track to change the inclination angle and discharge position of the inclined conveying pipe 303. The support wheels 307 have a braking function to fix the inclined support frame 306 after selecting the position to prevent displacement during the conveying process. Brackets 3020 are provided at both ends of the inclined surface of the inclined support frame 306. The brackets 3020 abut against the heat sink 305 to support the inclined conveying pipe 303 and realize the force distribution.

[0084] The track can be set on the base platform or equipment frame. The track is preferably two parallel guide rails / ground rails arranged along the moving direction of the inclined support frame. The support wheels set at the lower end of the inclined support frame roll in cooperation with the track so that the inclined support frame can move linearly along the track, thereby realizing the adjustment of the discharge position of the inclined conveying pipe within a predetermined range. To limit the movement stroke, the end of the track can be set with a limit block / stop, or a limit component can be set between the frame and the track to prevent the frame from moving beyond its stroke.

[0085] To achieve positioning and fixation after adjustment to the target discharge position, the support wheel can be a foot-operated caster with a braking structure or a roller with a locking mechanism. The braking structure / locking mechanism is used to limit the rotation or direction of the support wheel, thereby keeping the tilting support frame in the set position. Alternatively or optionally, the frame can also be locked in position by cooperating with the rail by setting clamps, locking pins or wedges.

[0086] The top of the guide cover 302 is provided with an inspection cover 3012 for inspecting, cleaning and clearing obstacles inside the guide cover 302; a temperature sensor 3011 is provided on the guide cover 302 for real-time monitoring of the temperature of the discharged slag, so as to provide temperature signals for the operation adjustment of the cooling circulation system and the downstream process control.

[0087] In one operating mode, high-temperature slag is discharged from the slag discharge port of the pyrolysis equipment and enters the slag conveying pipe 301 through the flange structure. The geared motor 3013 drives the spiral shaft 3015 to rotate, pushing the slag to the guide cover 302. After being collected by the guide cover 302, the slag enters the inclined conveying pipe 303 through the connecting guide pipe 3019. The geared motor 3014 drives the hollow shaft 3016 and the spiral blade 3017 to rotate, continuously pushing the slag along the inclined conveying pipe 303 to the discharge end, and then discharges it through the discharge pipe 309. The cooling medium enters the heat dissipation chamber through the inlet 304 and flows out through the outlet 308, forming a continuous heat exchange condition between the heat dissipation cover 305 and the inclined conveying pipe 303, realizing indirect cooling during the conveying process. The inclination angle and discharge position of the inclined conveying pipe 303 can be adjusted by moving the inclined support frame 306 along the track. The support wheel 307 maintains a stable position after braking.

[0088] In the above embodiments, the inclined conveying pipe 303 can be connected in two or more sections according to the conveying distance; the fastening method of the cover plate 3010 can be selected by bolt fastening or quick lock according to maintenance requirements; the spacing of the supporting fan-shaped plate 3018 and the opening ratio of the flow hole 3021 can be matched and set according to the cooling medium flow rate and allowable pressure drop; the temperature sensor 3011 can be selected by thermocouple or resistance temperature detector according to the on-site temperature range and can be installed by insertion or wall mounting.

[0089] Working principle: After the burner 102 ignites the fuel, the hot air furnace 103 generates high-temperature hot air, which enters the lower pyrolysis furnace 104 through the furnace inlet 1012, providing a continuous and uniform heat source for the upper pyrolysis furnace 106; the inner wall of the furnace is made of refractory material and a high-efficiency heat insulation layer structure, which can reduce heat loss and ensure uniform heat distribution; the heat is conducted from bottom to top along the furnace to the material cracking tube set in the upper pyrolysis furnace 106, so that its internal temperature is stably maintained between 450℃ and 600℃, thereby providing the necessary conditions for the cracking reaction;

[0090] After the material enters the material pyrolysis pipe through the feed inlet 108 via the feeding system, it moves continuously along the pipe axis under the drive of the screw conveyor assembly 1017. The screw conveyor assembly is driven to rotate by the geared motor 105. Its propeller blades 1018 and auxiliary plate 1021 work together to achieve continuous material conveying on the one hand, and to make the material constantly tumble and disperse during the movement, thereby ensuring full contact between the material and the high-temperature pipe wall, promoting uniform heat transfer and efficient pyrolysis. As the material is gradually heated in the pyrolysis pipe, its organic components undergo thermal decomposition reaction to generate oil and gas and solid carbon slag.

[0091] The oil and gas produced by pyrolysis are introduced into the catalytic tank through the oil and gas outlet 107 for secondary catalytic cracking and condensation separation to obtain liquid fuel oil and a small amount of combustible gas. The carbon slag enters the slag discharge port 109 by gravity and screw conveyor, and is continuously discharged by screw conveyor 1010 to achieve continuous production. After releasing heat, the flue gas in the system is sent back to the hot blast furnace 103 by the circulating fan 101 for reheating, realizing the recovery and recycling of waste heat from the flue gas, reducing energy consumption and maintaining a constant furnace temperature. The entire system is monitored in real time by temperature sensors and frequency conversion control system, which automatically adjusts the screw conveyor speed and burner power to ensure that different materials complete the pyrolysis reaction within the optimal residence time and temperature range, thereby achieving a highly efficient, stable, and energy-saving continuous pyrolysis process.

[0092] A continuous pyrolysis method, employing the aforementioned continuous pyrolysis system, includes the following steps:

[0093] S1, the crushed tire rubber and other materials are put into the material storage box 7. The bottom screw feeding mechanism at the bottom of the material storage box 7 feeds the material into the material conveying screw conveyor 8, and then the elevator 9 lifts it to the distribution hopper 4, and the distribution hopper 4 divides the material into two paths.

[0094] S2, the two materials are fed into the two weighing bins 206 of the weighing feeder 3 respectively, and the weighing sensor 204 is used to weigh and measure each weighing bin 206. After the weighing reaches the set condition, the material is discharged to the feed conveying pipe 202 through the discharge gate valve 2011.

[0095] S3, drive the spiral shaft 2010 in the feed conveying pipe 202 to rotate, continuously feed the material into the feed port 108 of the continuous pyrolysis furnace 1, and drive the spiral conveying assembly 1017 in the material pyrolysis pipe to rotate, so that the material can move continuously along the axial direction of the material pyrolysis pipe and be heated and pyrolyzed in the furnace to generate oil, gas and solid slag.

[0096] S4, the oil and gas generated by cracking are introduced into the catalytic tank through the oil and gas outlet 107 for secondary catalysis and preliminary gas-liquid separation. The outlet of the catalytic tank is connected to the temporary storage tank through the water-cooled overhead pipe to achieve buffering and initial cooling. The outlet of the temporary storage tank is connected to the serpentine cooling pipe in the water-cooled box to achieve secondary cooling and condensation. The condensed products are collected in the oil storage tank through the oil pipeline, thus completing the cooling and collection of oil and gas.

[0097] S5, the solid slag generated by pyrolysis enters the slag conveying mechanism through the slag discharge port 109, and is conveyed to the discharge end through the spiral conveying component in the slag conveying pipe 301 and the inclined conveying pipe 303.

[0098] In this embodiment, the temporary storage tank in the oil and gas catalytic and condensation separation unit is a structural unit disclosed in the applicant's prior application. Its overall configuration, internal flow heat exchange, and impurity sedimentation and sewage discharge mechanism can be directly adopted from the technical solution of the prior application. Based on this, this application uses the temporary storage tank as an oil and gas buffer and primary cooling module of the continuous pyrolysis system. It is connected to the upstream catalytic tank and the downstream water-cooled box through pipelines and integrated in a frame layered arrangement, thereby forming a continuous processing link suitable for continuous operation: "catalysis - pre-cooling - buffer primary cooling - secondary cooling condensation - oil storage and collection". Therefore, the specific structure and working principle of the temporary storage tank will not be elaborated without affecting the overall system implementation of this application. Only its interface relationship and synergistic effect with the system of this application will be explained as necessary.

[0099] Specifically, in this embodiment, the oil and gas catalytic and condensation separation unit includes a catalytic tank, a water-cooled overhead pipe, a temporary storage tank, a water-cooled enclosure, and an oil storage tank. The temporary storage tank, the water-cooled enclosure, and the oil storage tank are integrated and arranged in a layered frame to form a compact modular component. High-temperature oil and gas are transported from the outlet of the catalytic tank to the oil and gas inlet of the temporary storage tank through the water-cooled overhead pipe. After buffering and initial cooling in the temporary storage tank, the oil and gas is introduced into the serpentine cooling pipe in the water-cooled enclosure through the oil and gas outlet at the top of the temporary storage tank for secondary cooling and condensation. The condensation products are finally collected in the oil storage tank through the oil pipeline, thus constructing a continuous processing link of "temporary storage and buffering - staged heat exchange - condensation and collection". The process is coherent and easy to integrate and apply in pyrolysis units.

[0100] The temporary storage tank adopts an upper cylindrical and lower conical structure. The end cap is connected and sealed to the tank body via a flange. An internal guide pipe is installed inside the tank, and the oil and gas inlet is sealed and abutted against the upper end of the guide pipe, so that the oil and gas are forced to the bottom of the tank and then rise back. During the rising back, the oil and gas exchange heat with the spiral cooling pipe wrapped around the outside of the guide pipe to achieve primary cooling. A high-temperature and corrosion-resistant filter screen is installed between the lower end of the guide pipe and the inner wall of the tank to disperse the airflow and intercept large particulate impurities. The impurities settle in the conical part and are discharged through the bottom drain valve. At the same time, a temperature sensor and cooling water inlet and outlet valves can be configured to monitor and regulate the cooling water circulation, realizing an integrated primary cooling unit that integrates buffering, forced flow, enhanced heat exchange, filtration and settling, and online draining.

[0101] The upper part of the water-cooled box can be open and equipped with a cover. Inside the box, multiple layers of water-cooled support frames are arranged along the height direction to support and limit the serpentine cooling pipes formed by detachable splicing of straight oil pipe sections and elbow flanges. Oil and gas enter the serpentine channel through the material connection pipe and exchange heat with the circulating cooling water to achieve deep condensation. The system can be configured with two water-cooled boxes, interconnected by connecting water pipes, main inlet pipes, and balance water pipes. Simultaneously, series oil pipes extend the heat exchange path through multiple stages to adapt to different processing scales. The cooling water circuit can be supplied by two parallel booster pumps with corresponding control valves for maintenance and to ensure stable circulation. In the catalytic tank structure, the lower end of the tank has an oil and gas inlet connected to the cracking furnace outlet, allowing oil and gas to enter the tank from bottom to top for catalysis and preliminary separation. A tangentially arranged, downward-sloping outlet pipe on the outer side of the tank is used to guide the separated oil out and flow through the water-cooled overhead pipe to the subsequent temporary storage tank. Conduits are installed along the axis inside the tank, and oil and gas separation is achieved through isolation rings. The system incorporates a separation hood and a lower sealing plate above the duct to facilitate the flow of oil and gas, enabling dynamic stratification and separation by causing the oil to sink and the gas to rise. A flanged inner pipe serves as an exhaust channel, connected by bolts and a sealing ring to ensure reliable high-temperature sealing. The separation hood and upper cover structure facilitate disassembly and maintenance. The water-cooled overhead pipe uses a concentric double-layered pipeline to form a water-cooled jacket. An inlet ball valve is located at the bottom of the outer pipe, and an outlet ball valve at the top, connecting to the temporary storage tank and the water-cooled housing for cooling water recycling. Semi-circular flow dividers are arranged axially within the jacket cavity, creating a serpentine flow path to enhance heat exchange and provide support and reinforcement. One end of the water-cooled inner pipe connects to the inlet of the temporary storage tank, while the other end connects to the outlet pipe of the catalytic tank via a flanged flexible corrugated pipe assembly. This absorbs installation deviations and thermal expansion stress, pre-cools the gas during oil and gas transport, reduces downstream cooling load, and improves operational safety.

[0102] Based on the above structural design, the continuous pyrolysis furnace of the present invention achieves continuous, efficient and controllable pyrolysis reaction through the synergistic effect of modular spiral conveyor components, high-precision connectors, upper and lower double pyrolysis pipes and circulating hot air system; the equipment as a whole has good thermal stability and structural rigidity, is easy to operate and maintain, has high energy utilization rate, and can be widely used in the field of pyrolysis treatment of waste rubber, waste plastics and organic solid waste.

[0103] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Various changes and modifications can be made to the present invention without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A continuous pyrolysis system, characterized in that, The system includes a material storage tank (7), a feeding system, a distribution hopper (4), a weighing feeder (3), a continuous pyrolysis furnace (1), an oil and gas catalytic and condensation separation unit, and a slag conveying mechanism, all connected in sequence. The feeding system includes a material conveying screw conveyor (8) and an elevator (9). The bottom of the material storage tank (7) is equipped with a bottom screw feeding mechanism for feeding materials into the material conveying screw conveyor (8). The discharge end of the material conveying screw conveyor (8) is connected to the feed end of the elevator (9), and the discharge end of the elevator (9) is connected to the distribution hopper (4). The weighing feeder (3)... The system includes two parallel weighing hoppers (206), with the two outlets of the distribution hopper (4) respectively connected to the inlets of the two weighing hoppers (206); each weighing hopper (206) is supported on a frame (209) by a weighing sensor (204); the lower end of each weighing hopper (206) is connected to a feeding conveying pipe (202) via a discharge gate valve (2011), and the feeding conveying pipe (202) is equipped with a spiral shaft (2010), which is driven by a drive motor to rotate and feed the material into the inlet (108) of the continuous pyrolysis furnace (1); the continuous The continuous pyrolysis furnace (1) includes a hot blast stove (103), an upper pyrolysis furnace (106), a lower pyrolysis furnace (104), and a material pyrolysis pipe installed in the furnace. A spiral conveying assembly (1017) is installed inside the material pyrolysis pipe. The spiral conveying assembly (1017) is driven to rotate by a geared motor (105) to continuously advance the material along the axial direction of the material pyrolysis pipe. The continuous pyrolysis furnace (1) has an oil and gas outlet (107) connected to the oil and gas secondary catalytic and condensation separation unit. The continuous pyrolysis furnace (1) also has a slag discharge port (109) connected to the slag conveying mechanism. The slag conveying mechanism includes... The unit includes a slag conveying pipe (301) sealed to the slag discharge port (109) and an inclined conveying pipe (303) connected to the slag conveying pipe (301). The inclined conveying pipe (303) is equipped with a spiral conveying component to convey the slag to the discharge end. The oil and gas secondary catalysis and condensation separation unit includes a catalytic tank (12), a temporary storage tank, a water-cooled box and an oil storage tank. The oil and gas outlet (107) is connected to the inlet of the catalytic tank (12). The outlet of the catalytic tank (12) is connected to the temporary storage tank via a water-cooled overhead pipe. The outlet of the temporary storage tank is connected to a serpentine cooling pipe inside the water-cooled box. The condensation products of the serpentine cooling pipe enter the oil storage tank via an oil delivery pipe.

2. The continuous pyrolysis system according to claim 1, characterized in that: The weighing hopper (206) is provided with at least three legs (205) in the circumferential direction. Each leg (205) is connected to the frame (209) through the weighing sensor (204). Each weighing hopper (206) is provided with a rotating shaft (2016) and a material feeding plate (2018) on the rotating shaft (2016). The rotating shaft (2016) is driven to rotate by a drive motor located on the top of the weighing hopper (206).

3. The continuous pyrolysis system according to claim 1, characterized in that: The feed conveying pipe (202) is provided with a flexible pipe connection assembly (203) at one end near the continuous pyrolysis furnace (1). The flexible pipe connection assembly (203) includes a connecting flange (2012), an adjusting flange (2013), and a bellows (2014) disposed between the connecting flange (2012) and the adjusting flange (2013). The inner diameter of the flange hole of the adjusting flange (2013) is larger than the outer diameter of the feed conveying pipe (202), so that a circumferential gap (2021) is formed between the adjusting flange (2013) and the feed conveying pipe (202).

4. A continuous pyrolysis system according to claim 1, characterized in that: The material pyrolysis tube of the continuous pyrolysis furnace (1) includes at least a material pyrolysis tube one (1014) and a material pyrolysis tube two (1013) arranged in parallel. One end of the material pyrolysis tube one (1014) and the material pyrolysis tube two (1013) are connected by a short pipe (1016). The other end of the material pyrolysis tube one (1014) is provided with the feed inlet (108) and the oil and gas outlet (107), and the other end of the material pyrolysis tube two (1013) is provided with the slag discharge port (109).

5. A continuous pyrolysis system according to claim 4, characterized in that: The spiral conveying assembly (1017) includes several spiral conveying units that are detachably connected along the axial direction; each spiral conveying unit includes a spiral connecting shaft (1023) and a propeller blade (1018) fixed on the spiral connecting shaft (1023). Adjacent spiral connecting shafts (1023) are detachably connected by a female connector (1024) and a male connector (1025) through a pin; the female connector (1024) is provided with a limiting platform (1030), and the male connector (1025) is provided with a positioning platform (1027). The limiting platform (1030) and the positioning platform (1027) cooperate to limit the docking depth and improve coaxiality.

6. A continuous pyrolysis system according to claim 1, characterized in that: Each spiral conveyor unit also includes a material feeding reinforcement structure disposed between the spiral connecting shaft (1023) and the propeller blade (1018). The material feeding reinforcement structure includes a reinforcing material feeding plate (1020) and an auxiliary plate (1021). One end of the auxiliary plate (1021) is fixedly connected to the spiral connecting shaft (1023), and the other end is fixedly connected to the propeller blade (1018).

7. A continuous pyrolysis system according to claim 1, characterized in that: The pyrolysis furnace (104) is provided with a circulating flue gas outlet (1011), which is connected to the air inlet of the hot blast stove (103) via a circulating fan (101).

8. A continuous pyrolysis system according to claim 1, characterized in that: The outlet end of the slag conveying pipe (301) is connected to the guide cover (302), and the guide cover (302) is connected to the feed end of the inclined conveying pipe (303) through the connecting guide pipe (3019); a heat dissipation cover (305) is provided on the outer periphery of the inclined conveying pipe (303) and together with the inclined conveying pipe (303) to form a heat dissipation cavity, and the heat dissipation cavity is provided with a water inlet (304) and a water outlet (308) for connecting with the cooling circulation system to exchange heat and cool down the slag conveyed in the inclined conveying pipe (303).

9. A continuous pyrolysis system according to claim 1, characterized in that: The inclined conveying pipe (303) is mounted on a movable inclined support frame (306), and the lower end of the inclined support frame (306) is provided with a support wheel (307) with brakes to realize the position adjustment and positioning of the inclined conveying pipe (303).

10. A continuous pyrolysis method, characterized in that, The continuous pyrolysis system according to any one of claims 1-9 includes the following steps: S1. The crushed tire rubber and other materials are put into the material storage box (7). The bottom screw feeding mechanism at the bottom of the material storage box (7) feeds the material into the material conveying screw conveyor (8), and then the elevator (9) lifts it to the distribution hopper (4), and the distribution hopper (4) divides the material into two paths. S2. The two materials are fed into the two weighing bins (206) of the weighing feeder (3), and the weighing sensor (204) is used to weigh each weighing bin (206). After the weighing reaches the set condition, the material is discharged to the feed conveying pipe (202) through the discharge gate valve (2011). S3. Drive the spiral shaft (2010) in the feed conveying pipe (202) to rotate, continuously feed the material into the feed port (108) of the continuous pyrolysis furnace (1), and drive the spiral conveying assembly (1017) in the material pyrolysis pipe to rotate, so that the material can move continuously along the axial direction of the material pyrolysis pipe and be heated and pyrolyzed in the furnace to generate oil and gas and solid slag. S4. The oil and gas generated by cracking are introduced into the catalytic tank through the oil and gas outlet (107) for secondary catalysis and preliminary gas-liquid separation. The outlet of the catalytic tank is connected to the temporary storage tank through the water-cooled overhead pipe to achieve buffering and initial cooling. The outlet of the temporary storage tank is connected to the serpentine cooling pipe in the water-cooled box to achieve secondary cooling and condensation. The condensed products are collected in the oil storage tank through the oil pipeline, thereby completing the cooling and collection of oil and gas. S5. The solid slag produced by pyrolysis is fed into the slag conveying mechanism through the slag discharge port (109) and conveyed to the discharge end through the spiral conveying component in the slag conveying pipe (301) and the inclined conveying pipe (303).

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