A continuous waste plastic thermal cracking reactor based on resource recycling

Abstract

This invention relates to the field of waste plastic pyrolysis technology, and particularly to a continuous pyrolysis reactor for waste plastics based on resource recycling. The reactor includes a reactor body with a connecting cover fixedly attached to its upper end. An inlet is provided on the inner wall of the reactor body, and a sealing pipe is provided on the outer wall of the reactor body. A rotating shaft is rotatably mounted on the upper end of the reactor body, and a drive motor is mounted on the upper side of the rotating shaft. The drive motor is fixedly connected inside the connecting cover, and its output end is fixedly connected to the rotating shaft. This invention provides a continuous pyrolysis reactor for waste plastics based on resource recycling. The separation mechanism enables more thorough gas-liquid separation and allows the separated liquid to automatically fall, improving the reaction sufficiency of the liquid during stirring. The stirring mechanism both agitates the liquid and drives the rotating shaft to automatically and quickly separate the liquid in the separation mechanism. The structure is simple.

Description

Technical Field

[0001] This invention relates to the field of waste plastic pyrolysis technology, specifically to a continuous pyrolysis reactor for waste plastics based on resource recycling. Background Technology

[0002] Thermopyrolysis of waste plastics is a core technology for the high-value utilization of organic solid waste. In my country, trough-type reactors are mainly used for the pyrolysis of waste plastics to produce fuel oil. Continuous pyrolysis reactors are the core equipment of the whole process. Currently, the mainstream continuous pyrolysis reactors in the industry mostly use spiral blades and agitators as core internal components, and are equipped with external jacket heating and external separation systems to achieve continuous production. However, there are prominent industrialization bottlenecks: under the unidirectional external heating mode, the radial temperature difference inside the reactor is large, which makes it easy for coking to occur on the wall and incomplete pyrolysis of the central material. Conventional internal components cannot take into account both stable conveying and mass and heat transfer, which can easily aggravate liquid-gas mixing. The coking removal mechanism is prone to jamming and wear, requiring frequent shutdowns for maintenance and a short continuous operation cycle.

[0003] The core shortcoming of existing technologies is that the functional modules of conveying, heating, separation, and waste heat recovery are completely separated, which easily leads to functional conflicts and makes it impossible to form a synergistic closed loop. The existing architecture of liquid-gas co-flow and external separation is prone to oil and gas carrying, pipeline coking and secondary cracking, resulting in low oil yield. The waste heat of oil and gas is mostly recovered by external heat exchangers, which has insufficient utilization rate and high system energy consumption. The heavy reflux material is not completely cracked, the raw material conversion rate is low, and it can only be used for pure polyolefin waste plastics. The pretreatment cost of mixed waste plastics is high, which limits the large-scale promotion of the technology. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a continuous pyrolysis reactor for waste plastics based on resource recycling.

[0005] This invention adopts the following technical solution: a continuous pyrolysis reactor for waste plastics based on resource recycling, comprising a reactor body, a connecting cover fixedly connected to the upper end of the reactor body, a feed inlet on the inner wall of the reactor body, a sealing pipe on the outer wall of the reactor body, a rotating shaft rotatably mounted on the upper end of the reactor body, a drive motor mounted on the upper side of the rotating shaft, the drive motor fixedly connected inside the connecting cover, the output end of the drive motor fixedly connected to the rotating shaft, a connecting rod fixedly connected to the lower outer wall of the rotating shaft, and a scraper rod at the end of the connecting rod away from the rotating shaft, and further comprising: The separation mechanism is capable of separating the gas and liquid in the inner cavity of the reactor body in real time. The separation mechanism is located in the upper part of the inner cavity of the reactor body. The reactor body is equipped with a stirring mechanism that can stir the liquid inside the reactor body and make the heat distribution more uniform. The stirring mechanism is located inside the reactor body.

[0006] As a further description of the above technical solution: the separation mechanism includes a separation hood, which is fixed to the inner wall of the upper end of the reactor body. The separation hood is movably sleeved on the outside of the rotating shaft. The separation hood is located above the feed inlet. A leak-proof and wear-resistant ring is provided at the contact part between the separation hood and the rotating shaft. A transition cavity one is opened inside the bottom end of the separation hood. A conical groove is opened on one side of the transition cavity inside the separation hood. An air outlet is connected between the transition cavity one and the conical groove. A threaded liquid guiding groove is opened on the inner wall of the conical groove. A transition cavity two is opened on the upper side of the conical groove inside the separation hood. An air jet is connected between the transition cavity two and the conical groove. A connecting hose is connected to the upper end of the transition cavity two. The connecting hose is connected to the outside of the reactor body. A liquid flow groove is opened at the bottom end of the conical groove. A through groove is opened at the end of the transition cavity one away from the rotating shaft, and a one-way valve is provided in the through groove.

[0007] As a further description of the above technical solution: the stirring mechanism includes a vertical air guide groove, which is opened inside the rotating shaft; a horizontal groove is opened inside the connecting rod; an air inlet groove is opened at the upper end of the scraper; the upper end of the air inlet groove is connected to the upper side of the scraper; the vertical air guide groove, the horizontal groove, and the air inlet groove are connected; a connecting slot is connected at the upper end of the vertical air guide groove; the upper end of the connecting slot is connected to a transition cavity; a slide is slidably provided at the end of the scraper away from the reactor body; the bottom end of the slide extends to the outside of the scraper; a return spring is fixedly connected between the slide and the scraper; a limit rod is fixedly connected at the upper end of the slide; a rotating block is rotatably provided at the end of the connecting rod near the scraper; the rotating block is fixedly connected to the scraper; and the limit rod is inserted into the connecting rod and the rotating block.

[0008] As a further description of the above technical solution: several scraper rods are evenly spaced, and the end of the scraper rod near the inner wall of the reactor body is elastic.

[0009] As a further description of the above technical solution: the conical groove is in the shape of an inverted frustum, the air outlet is opened towards the rotation axis, and the air outlet and the jet nozzle are staggered vertically.

[0010] As a further description of the above technical solution: the bottom end of the threaded liquid guide groove is connected to the liquid flow groove, and the one-way valve allows the water to flow only from top to bottom.

[0011] As a further description of the above technical solution: the side wall of the bottom end of the transition cavity near the rotating shaft is higher than the side away from the rotating shaft.

[0012] As a further description of the above technical solution: the slide extends to the scraper rod and has inclined sliding surfaces on both opposite sides.

[0013] This invention provides an improved continuous pyrolysis reactor for waste plastics based on resource recycling, which has the following improvements and advantages compared with the prior art: Firstly, the built-in separation mechanism enables efficient in-situ gas-liquid separation of pyrolyzed oil and gas, solving the industry pain points of existing technologies such as liquid-gas mixing and oil-gas carrying. Its three-stage separation design guides the oil and gas to rise in a spiral, achieving multi-stage interception and sedimentation of droplets, thus avoiding pipeline coking and secondary pyrolysis of oil and gas from the source, effectively improving the oil yield and oil quality. The separated heavy droplets automatically flow back to the reaction chamber, realizing the recycling of incompletely pyrolyzed materials and greatly improving the utilization rate of raw materials. Secondly, by linking the gas path of the stirring mechanism and the separation mechanism, the in-situ cascade utilization of waste heat from oil and gas is achieved. High-temperature oil and gas circulate through the scraper channel, balancing the temperature of the upper and lower chambers inside the reactor. This solves the problems of uneven heating, coking on the wall surface, and incomplete pyrolysis of the central material caused by unidirectional external heating. At the same time, the high-temperature scraper can preheat the reflux heavy material, enhance reaction efficiency, and is suitable for mixed waste plastic raw materials, significantly reducing pretreatment costs. Thirdly, it achieves integrated and coordinated stirring, separation, and decoking without additional driving components, resulting in a minimalist structure, low failure rate, and self-adaptive self-locking and unlocking scraper. It enhances the preheating effect during the reaction and achieves decoking without dead angles on the inner wall of the reactor after the reaction. This solves the problems of easy jamming and frequent shutdown for maintenance of existing decoking mechanisms, significantly extends the continuous operation cycle, forms a positive closed loop of reaction, is suitable for industrial continuous production, and has outstanding value for large-scale promotion. In summary, the separation mechanism enables more thorough gas-liquid separation and allows the separated liquid to fall automatically. It also improves the reaction sufficiency of the liquid when the stirring mechanism is agitated. The stirring mechanism can both agitate the liquid and drive the rotating shaft to automatically and quickly separate the liquid in the separation mechanism. The structure is simple, and the scraper can make full use of the heat of the escaping gas, making the heat in the reactor body more uniform. Furthermore, the scraper can preheat the liquid, improving efficiency. It can also self-lock and automatically unlock, and when tilted, it can increase the contact area with the separated liquid. Attached Figure Description

[0014] The present invention will be further explained below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 A three-dimensional cross-sectional view of the reaction vessel body provided in an embodiment of the present invention. Figure 1 ; Figure 3 A three-dimensional cross-sectional view of the reaction vessel body provided in an embodiment of the present invention. Figure 2 ; Figure 4 A perspective sectional view of the separation shroud provided in an embodiment of the present invention; Figure 5This is a partial enlarged view of the conical groove provided in an embodiment of the present invention; Figure 6 for Figure 4 Enlarged view of point A in the middle; Figure 7 for Figure 4 Enlarged view of point B in the middle; Figure 8 for Figure 5 A magnified view of point C in the middle.

[0015] In the diagram: 1. Reactor body; 2. Connecting cover; 3. Sealing pipe; 4. Feed inlet; 5. Drive motor; 6. Rotating shaft; 7. Scraper; 8. Separation mechanism; 81. Separation cover; 82. Leak-proof wear-resistant ring; 83. Transition chamber one; 84. Gas outlet; 85. Conical groove; 86. Threaded liquid guide groove; 87. Transition chamber two; 88. Air jet; 89. Connecting hose; 810. One-way valve; 811. Liquid flow groove; 9. Stirring mechanism; 91. Vertical gas guide groove; 92. Horizontal groove; 93. Air inlet groove; 94. Connecting groove opening; 95. Slide frame; 96. Return spring; 97. Rotating block; 98. Limiting rod; 10. Connecting rod. Detailed Implementation

[0016] To make the technical means, creative features, objectives, and effects of this invention readily understandable, the invention is further described below with reference to specific illustrations. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Please see Figure 1 - Figure 8 This invention provides a technical solution: a continuous pyrolysis reactor for waste plastics based on resource recycling, comprising a reactor body 1, a connecting cover 2 fixedly connected to the upper end of the reactor body 1, a feed inlet 4 on the inner wall of the reactor body 1, a sealing pipe 3 on the outer wall of the reactor body 1, a rotating shaft 6 rotatably mounted on the upper end of the reactor body 1, a drive motor 5 mounted on the upper side of the rotating shaft 6, the drive motor 5 fixedly connected inside the connecting cover 2, the output end of the drive motor 5 fixedly connected to the rotating shaft 6, a connecting rod 10 fixedly connected to the lower outer wall of the rotating shaft 6, and a scraper 7 mounted on the end of the connecting rod 10 away from the rotating shaft 6, and further comprising: The separation mechanism 8 is capable of separating the gas and liquid in the inner cavity of the reactor body 1 in real time. The separation mechanism 8 is located in the upper part of the inner cavity of the reactor body 1. And the stirring mechanism 9, which can stir the liquid inside the reactor body 1 and make the heat in the upper and lower parts more uniform, is located inside the reactor body 1.

[0018] Several scraper rods 7 are evenly spaced, and the end of the scraper rod 7 near the inner wall of the reactor body 1 is elastic.

[0019] Specifically, the built-in separation mechanism 8 enables in-situ high-efficiency gas-liquid separation of pyrolysis oil and gas, solving the industry pain points of liquid-gas mixing and oil-gas carrying in existing technologies. Its three-stage separation design guides the oil and gas spiral upward, realizing multi-stage interception and sedimentation of droplets, avoiding pipeline coking and secondary pyrolysis of oil and gas from the source, effectively improving oil yield and oil quality. The separated heavy droplets automatically flow back to the reaction chamber, realizing the recycling of incompletely pyrolyzed materials and greatly improving the utilization rate of raw materials. By linking the gas path of the stirring mechanism 9 and the separation mechanism 8, the in-situ cascade utilization of waste heat from oil and gas is achieved. High-temperature oil and gas flow through the scraper 7 channel, balancing the temperature of the upper and lower chambers inside the reactor. This solves the problems of uneven heating, coking on the wall surface, and incomplete pyrolysis of the central material caused by unidirectional external heating. At the same time, the high-temperature scraper 7 can preheat the reflux heavy material, enhance reaction efficiency, and is suitable for mixed waste plastic raw materials, significantly reducing pretreatment costs. It achieves integrated and coordinated stirring, separation and decoking, with no additional driving components, extremely simple structure and low failure rate. The scraper 7 can self-adaptively lock and unlock, enhance the preheating effect during the reaction, and achieve decoking without dead corners on the inner wall of the reactor after the reaction. It solves the problems of easy jamming and frequent shutdown for maintenance of existing decoking mechanisms, greatly extends the continuous operation cycle, forms a positive closed loop of reaction, is suitable for industrial continuous production, and has outstanding value for large-scale promotion. The separation mechanism 8 can not only make the gas-liquid separation more thorough, but also make the separated liquid fall automatically. It can improve the reaction of the liquid when the stirring mechanism 9 is agitated. The stirring mechanism 9 can not only agitate the liquid, but also drive the rotating shaft 6 to automatically and quickly separate the liquid in the separation mechanism 8. The structure is simple, and the scraper 7 can make full use of the heat of the escaped gas to make the heat in the reaction vessel body 1 more uniform. The scraper 7 can also preheat the liquid to improve efficiency. It can also be self-locking and automatically unlocking. When tilted, it can increase the contact area with the separated liquid.

[0020] In another embodiment of the present invention, the separation mechanism 8 includes a separation cover 81, which is fixed to the inner wall of the upper end of the reactor body 1. The separation cover 81 is movably sleeved on the outside of the rotating shaft 6. The separation cover 81 is located above the feed inlet 4. A leak-proof and wear-resistant ring 82 is provided at the contact part between the separation cover 81 and the rotating shaft 6. A transition cavity 83 is opened inside the bottom end of the separation cover 81. A conical groove 85 is opened on the side of the transition cavity 83 inside the separation cover 81. The transition cavity 83 and the conical groove 85 are connected. There is an air outlet 84, and a threaded liquid guide groove 86 is opened on the inner wall of the conical groove 85. A transition chamber 87 is opened on the upper side of the conical groove 85 inside the separation cover 81. An air outlet 88 is connected between the transition chamber 87 and the conical groove 85. A connecting hose 89 is connected to the upper end of the transition chamber 87. The connecting hose 89 is connected to the outside of the reactor body 1. A liquid flow groove 811 is opened at the bottom end of the conical groove 85. A through groove is opened at the end of the transition chamber 83 away from the rotating shaft 6, and a one-way valve 810 is installed in the through groove.

[0021] The conical groove 85 is in the shape of an inverted frustum, and the air outlet 84 is opened facing the rotating shaft 6. The air outlet 84 and the jet nozzle 88 are staggered vertically.

[0022] The bottom end of the threaded liquid guide groove 86 is connected to the liquid flow groove 811, and the one-way valve 810 allows the liquid to flow only from top to bottom.

[0023] The side wall of the bottom end of the transition cavity 83, near the rotating shaft 6, is higher than the side away from the rotating shaft 6.

[0024] Specifically, the built-in separation mechanism 8 enables in-situ high-efficiency gas-liquid separation of pyrolysis oil and gas, solving the industry pain points of liquid-gas mixing and oil-gas carrying in existing technologies. Its three-stage separation design guides the oil and gas spiral upward, realizing multi-stage interception and sedimentation of droplets, avoiding pipeline coking and secondary pyrolysis of oil and gas from the source, effectively improving oil yield and oil quality. The separated heavy droplets automatically flow back to the reaction chamber, realizing the recycling of incompletely pyrolyzed materials and greatly improving the utilization rate of raw materials. By linking the gas path of the stirring mechanism 9 and the separation mechanism 8, the in-situ cascade utilization of waste heat from oil and gas is achieved. High-temperature oil and gas flow through the scraper 7 channel, balancing the temperature of the upper and lower chambers inside the reactor. This solves the problems of uneven heating, coking on the wall surface, and incomplete pyrolysis of the central material caused by unidirectional external heating. At the same time, the high-temperature scraper 7 can preheat the reflux heavy material, enhance reaction efficiency, and is suitable for mixed waste plastic raw materials, significantly reducing pretreatment costs.

[0025] In another embodiment of the present invention, the stirring mechanism 9 includes a vertical air guide groove 91, which is opened inside the rotating shaft 6. A horizontal groove 92 is opened inside the connecting rod 10. An air inlet groove 93 is opened at the upper end of the scraper 7. The upper end of the air inlet groove 93 is connected to the upper side of the scraper 7. The vertical air guide groove 91, the horizontal groove 92 and the air inlet groove 93 are connected. A connecting slot 94 is connected at the upper end of the vertical air guide groove 91. The upper end of the connecting slot 94 is connected to the transition cavity 83. A slide 95 is slidably provided at the end of the scraper 7 away from the reactor body 1. The bottom end of the slide 95 extends to the outside of the scraper 7. A return spring 96 is fixed between the slide 95 and the scraper 7. A limiting rod 98 is fixedly connected at the upper end of the slide 95. A rotating block 97 is rotatably provided at the end of the connecting rod 10 near the scraper 7. The rotating block 97 is fixed to the scraper 7. The limiting rod 98 is inserted into the connecting rod 10 and the rotating block 97.

[0026] The slide 95 extends to the scraper 7 and has inclined sliding surfaces on both opposite sides of one end.

[0027] Specifically, it achieves integrated and coordinated stirring, separation, and decoking without additional driving components, resulting in a minimalist structure and low failure rate. The scraper 7 can adaptively lock and unlock, enhancing the preheating effect during the reaction and achieving decoking without dead angles on the inner wall of the reactor after the reaction. It solves the problems of easy jamming and frequent shutdown for maintenance of existing decoking mechanisms, significantly extends the continuous operation cycle, forms a positive closed loop of reaction, is suitable for industrial continuous production, and has outstanding value for large-scale promotion.

[0028] Working principle: When using this device, the liquid raw material is first introduced into the inner cavity of the reactor body 1 through the feed port 4, so that the raw material is located in the lower part of the inner cavity of the reactor body 1. When reaction stirring is required, the drive motor 5 is started. The drive motor 5 drives the rotating shaft 6 to rotate. Through the connection of the connecting rod 10, the scraper 7 also rotates, which can stir the raw material evenly and make the reaction more thorough. Gas is generated during the reaction. The gas and a small amount of liquid need to be discharged. The gas-liquid mixture will flow in from the upper end of the gas inlet groove 93. Then, the gas-liquid mixture enters the transition cavity 83 through the gas inlet groove 93, the horizontal groove 92, the vertical gas guide groove 91 and the connecting groove 94. Then, the gas and liquid rush out from the gas outlet 84. The gas-liquid mixture will be sprayed towards the outer wall of the rotating shaft 6. Because the rotating shaft 6 rotates at a relatively high speed and the liquid is heavier, the liquid on the outer wall of the rotating shaft 6 will be sprayed towards the outer wall of the rotating shaft 6. Due to centrifugal force, the liquid is thrown against the inner wall of the conical groove 85. Because the conical groove 85 is inclined, the liquid moves downward due to gravity. Due to the threaded liquid guide groove 86, the liquid can flow downward faster. Then the liquid flows from the liquid flow groove 811 into the transition chamber 83, and then flows out from the groove where the one-way valve 810 is located. The liquid flows downward into the inner cavity of the reactor body 1, which can make the gas-liquid separation more thorough. Then this part of the liquid continues to be stirred by the scraper 7 to react and make the reaction more thorough. Because the gas outlet 84 is inclined and the gas outlet 84 and the jet nozzle 88 are staggered vertically, the separated gas will spiral upward and then be discharged to the outside of the reactor body 1. When the gas spirals upward, it can also prevent the rising gas from being mixed with a very small amount of liquid, making the gas-liquid separation more thorough. Because the hotter gas flows out through the air inlet groove 93 inside the scraper 7, the separated liquid falls onto the scraper 7, which can preheat the liquid and make the temperature inside the reactor body 1 more uniform. This is more conducive to a more thorough reaction during stirring. When the scraper 7 rotates, because the molten plastic is a high-viscosity fluid, the slide 95 on the scraper 7 will be subjected to lateral extrusion force when the scraper 7 is stirred at a relatively fast speed. This causes the slide 95 to be squeezed into the scraper 7, which can pull the limiting rod 98 out of the connecting rod 10. After the limiting rod 98 is pulled out, the bottom end of the scraper 7 is squeezed by the high-viscosity fluid, which causes the scraper 7 to rotate automatically around the connecting rod 10. After the scraper 7 rotates, the area of ​​the scraper 7 that separates the falling liquid to the upper side is larger, which can improve the preheating effect of the scraper 7 on the separated liquid. After the reaction is complete, the raw materials are discharged from the lower side of the reactor body 1. Then, due to the weight of the scraper 7, the scraper 7 automatically rotates back to its original position, so that the limiting rod 98 is re-inserted into the connecting rod 10. Therefore, after the liquid is discharged, the scraper 7 rotates again, which can scrape the inner wall of the reactor body 1 to prevent a small amount of raw materials from sticking to the inner wall of the reactor body 1, making the cleaning more thorough. When the scraper 7 rotates around the rotating shaft 6, since there is no liquid in the reactor body 1, the slide 95 will not be pressed inward, which can make the scraper 7 self-locking.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous pyrolysis reactor for waste plastics based on resource recycling, comprising a reactor body (1), a connecting cover (2) fixedly connected to the upper end of the reactor body (1), a feed inlet (4) provided on the inner wall of the reactor body (1), a sealing pipe (3) provided on the outer wall of the reactor body (1), a rotating shaft (6) rotatably provided on the upper end of the reactor body (1), a drive motor (5) provided on the upper side of the rotating shaft (6), the drive motor (5) fixedly connected inside the connecting cover (2), the output end of the drive motor (5) fixedly connected to the rotating shaft (6), a connecting rod (10) fixedly connected to the outer wall of the lower end of the rotating shaft (6), and a scraper (7) provided at the end of the connecting rod (10) away from the rotating shaft (6), characterized in that, Also includes: The separation mechanism (8) is capable of separating the gas and liquid in the inner cavity of the reactor body (1) in real time. The separation mechanism (8) is located in the upper part of the inner cavity of the reactor body (1). And a stirring mechanism (9) is provided in the inner cavity of the reactor body (1) to stir the liquid and make the heat in the upper and lower parts more uniform. The stirring mechanism (9) is provided in the inner cavity of the reactor body (1).

2. The continuous pyrolysis reactor for waste plastics based on resource recycling according to claim 1, characterized in that: The separation mechanism (8) includes a separation cover (81), which is fixed to the inner wall of the upper end of the reactor body (1). The separation cover (81) is movably sleeved on the outside of the rotating shaft (6). The separation cover (81) is located above the feed inlet (4). A leak-proof and wear-resistant ring (82) is provided at the contact part between the separation cover (81) and the rotating shaft (6). A transition cavity (83) is opened inside the bottom end of the separation cover (81). A conical groove (85) is opened on the side of the transition cavity (83) inside the separation cover (81). An air outlet (85) is connected between the transition cavity (83) and the conical groove (85). 4) The inner wall of the conical groove (85) is provided with a threaded liquid guiding groove (86). The upper side of the conical groove (85) is provided with a transition chamber two (87) inside the separation hood (81). The transition chamber two (87) and the conical groove (85) are connected by a jet nozzle (88). The upper end of the transition chamber two (87) is connected with a connecting hose (89). The connecting hose (89) is connected to the outside of the reactor body (1). The bottom end of the conical groove (85) is provided with a liquid flow groove (811). The end of the transition chamber one (83) away from the rotating shaft (6) is provided with a through groove, and a one-way valve (810) is provided in the through groove.

3. The continuous pyrolysis reactor for waste plastics based on resource recycling according to claim 2, characterized in that: The stirring mechanism (9) includes a vertical air guide groove (91) located inside the rotating shaft (6). A horizontal groove (92) is provided inside the connecting rod (10). An air inlet groove (93) is provided at the upper end of the scraper (7). The upper end of the air inlet groove (93) is connected to the upper side of the scraper (7). The vertical air guide groove (91), the horizontal groove (92), and the air inlet groove (93) are connected. A connecting slot (94) is connected to the upper end of the vertical air guide groove (91). The upper end of the connecting slot (94) is connected to the transition cavity (83). The scraper (7) is connected to the reactor body (1) and a slide (95) is slidably provided at one end. The bottom end of the slide (95) extends to the outside of the scraper (7). A return spring (96) is fixed between the slide (95) and the scraper (7). A limit plug (98) is fixedly connected to the upper end of the slide (95). A rotating block (97) is rotatably provided at one end of the connecting rod (10) near the scraper (7). The rotating block (97) is fixed to the scraper (7). The limit plug (98) is inserted into the connecting rod (10) and the rotating block (97).

4. The continuous pyrolysis reactor for waste plastics based on resource recycling according to claim 1, characterized in that: The scraper (7) is provided at equal intervals, and the end of the scraper (7) near the inner wall of the reactor body (1) is elastic.

5. A continuous pyrolysis reactor for waste plastics based on resource recycling as described in claim 2, characterized in that: The conical groove (85) is in the shape of an inverted frustum, the air outlet (84) is opened towards the rotating shaft (6), and the air outlet (84) and the jet nozzle (88) are staggered vertically.

6. The continuous pyrolysis reactor for waste plastics based on resource recycling according to claim 2, characterized in that: The bottom end of the threaded liquid guide groove (86) is connected to the liquid flow groove (811), and the one-way valve (810) allows the liquid to flow only from top to bottom.

7. The continuous pyrolysis reactor for waste plastics based on resource recycling according to claim 2, characterized in that: The bottom of the transition cavity (83) is higher on the side wall near the rotating shaft (6) away from the rotating shaft (6).

8. A continuous pyrolysis reactor for waste plastics based on resource recycling according to claim 3, characterized in that: The slide (95) extends to the outside of the scraper (7) and has inclined sliding surfaces on both opposite sides.

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