A waste plastic pyrolysis reaction device

Abstract

The present application relates to the technical field of plastic cracking treatment, and specifically discloses a waste plastic cracking reaction device, which comprises a stirring device arranged in a reaction tank, and the stirring device comprises a stirring plate one, a stirring plate two and a driving assembly; the driving assembly is connected with the stirring plate one and the stirring plate two respectively to drive the stirring plate one and the stirring plate two to rotate around the center of the reaction tank; the stirring plate one is arranged close to the center of the reaction tank, the stirring plate two is arranged close to the inner wall of the reaction tank, and the stirring plate one and the stirring plate two rotate in opposite directions; one end of the stirring plate one and the stirring plate two close to each other is rotationally provided with a group of pressing plates, the rotation shafts of the pressing plates are perpendicular to the rotation shaft of the stirring plate one, and the rotation shafts of the two groups of pressing plates are arranged in a spaced mode in the vertical direction; a torsional spring for driving the pressing plates to rotate to a vertical state is arranged at the rotation shaft of the pressing plate; the waste plastic cracking reaction device has the effect of improving the yield of cracking oil.

Description

Technical Field

[0001] This invention relates to the technical field of plastic pyrolysis treatment, and more specifically to a waste plastic pyrolysis reaction device. Background Technology

[0002] Waste plastic pyrolysis technology is an environmentally friendly treatment technology that converts waste plastics into high-value-added energy or chemical raw materials through thermochemical decomposition. Its core principle is to use high temperatures in an oxygen-free or oxygen-limited environment to break down the large molecular chains of plastics, generating small-molecule hydrocarbons, ultimately producing fuel oil, combustible gases, and solid residues. This technology simultaneously solves the problem of plastic pollution and enables resource recycling, reducing dependence on fossil fuels.

[0003] Patent document CN116694349A discloses a catalytic cracking device for waste plastics and waste rubber, comprising: a crushing mechanism including a crushing box with a first feed hopper connected to its top and a pulverizing section installed on the crushing box; a reaction mechanism including a reaction tank with several heating wires fixedly connected inside, a transport section and a catalyst feeding section connected to its top, the transport section connected to the bottom of the crushing box, a stirring section installed inside the reaction tank, and a slag discharge section connected to its bottom; a condensation mechanism including a cooling section connected to the top of the reaction tank and a blocking section installed on the cooling section; and a heat recovery mechanism including a preheating section and a circulation section, the preheating section being fixedly mounted on the transport section, both the preheating section and the cooling section being connected to the circulation section, and the preheating section being connected to the cooling section. The stirring section includes a stirring shaft rotatably connected to the inner wall of the top of the reaction tank, a stirring frame fixedly connected to the outer wall of the stirring shaft, and a fourth motor fixedly connected to the top of the reaction tank, with the output shaft of the fourth motor coaxially fixed to the stirring shaft. By setting up a preheating section and a circulation section, the heat absorbed during the condensation of oil and gas can be used to preheat rubber or plastic particles.

[0004] However, this method also has the following problems: waste plastics are mostly mixtures of various plastics, and the melting temperatures of the different polymers they contain vary significantly, which is one of the important reasons for the decline in pyrolysis oil yield. Due to the different melting temperatures, the low-temperature components tend to melt first during the pyrolysis process, while the high-temperature components fail to melt simultaneously, thus forming agglomerates. The heat transfer within the agglomerates is hindered, causing local pyrolysis reactions to be incomplete, ultimately resulting in a decrease in pyrolysis oil yield. In addition, high-viscosity melts are generated during the pyrolysis process, and traditional stirring equipment cannot effectively disperse them, causing polymer molecular chains to become entangled, thus forming clumps that hinder the smooth progress of the pyrolysis reaction and affect the pyrolysis oil yield. Summary of the Invention

[0005] This invention provides a waste plastic pyrolysis reaction device, which aims to solve the problem in related technologies where the yield of pyrolysis oil is affected by the agglomeration of materials.

[0006] The waste plastic pyrolysis reaction device of the present invention includes a stirring device disposed in a reaction tank. The stirring device includes: a first stirring plate, a second stirring plate, and a driving assembly. The driving assembly is connected to the first stirring plate and the second stirring plate respectively to drive the first stirring plate and the second stirring plate to rotate around the center of the reaction tank. The first stirring plate is disposed near the center of the reaction tank, and the second stirring plate is disposed near the inner wall of the reaction tank. The first stirring plate and the second stirring plate rotate in opposite directions. A set of pressure plates is rotatably disposed at one end of the first stirring plate and the second stirring plate near each other. The rotation axis of the pressure plates is perpendicular to the rotation axis of the first stirring plate, and the rotation axes of the two sets of pressure plates are spaced apart in the vertical direction. A torsion spring is disposed at the rotation axis of the pressure plates to drive the pressure plates to rotate to a vertical state. When the first stirring plate and the second stirring plate are close to each other, the two sets of pressure plates abut and rotate. At the same time, the two sets of pressure plates move relative to each other until they separate, so as to squeeze the agglomerated material between the two sets of pressure plates.

[0007] The effect is that the drive assembly rotates stirring plate one and stirring plate two to stir the material in the reaction vessel. When stirring plate one and stirring plate two rotate, they intercept the agglomerated material. Stirring plate one and stirring plate two rotate in opposite directions, causing the pressure plate on stirring plate one and stirring plate two to rotate closer to each other and abut. The pressure plate squeezes the agglomerated material to eliminate the agglomerated material. The rotation axes of the two pressure plates are staggered in the vertical direction. When stirring plate one and stirring plate two continue to rotate, the two pressure plates rotate on their own while abutting, and at the same time, the pressure plate moves relative to the other pressure plate until the two pressure plates separate. During the process, the agglomerated material is kneaded again to further separate the agglomerated material, so that the material is heated evenly as a whole, thereby improving the yield of cracked oil.

[0008] Preferably, the side of the stirring plate one away from its axis of rotation is bent in a direction opposite to its rotation direction, and the side of the stirring plate two near the axis of rotation is bent in a direction opposite to its rotation direction.

[0009] The effect is that the first and second mixing plates are set in an arc shape. After the mixing plates intercept the agglomerated material, the agglomerated material is guided to the baffle through the arc side so that the agglomerated material can be squeezed by the baffle.

[0010] Preferably, a baffle is provided on the side of the pressure plate away from the mixing plate, and the baffle has multiple through holes.

[0011] Its effect is that when the clumped material moves to the baffle, the baffle intercepts the clumped material, causing it to stop moving after reaching the baffle.

[0012] Preferably, the baffle and the pressure plate are rotatably connected, the rotation axis of the baffle is parallel to the rotation axis of the first stirring plate, and a torsion spring is provided at the connection between the baffle and the first stirring plate to drive the baffle to rotate to be perpendicular to the pressure plate.

[0013] Its effect is that when the two sets of pressure plates rotate to be close to each other, the baffle abuts against the outer arc of stirring plate one or stirring plate two. Stirring plate one and stirring plate two continue to rotate, and the baffle rotates relative to the pressure plate until the pressure plate abuts against the other set of pressure plates, reducing the phenomenon of the baffle interfering with the cooperation of the two sets of pressure plates.

[0014] Preferably, scrapers are provided on the upper and lower sides of the two sets of pressure plates, and torsion springs are provided at the connection between the scrapers and the pressure plates. The torsion springs are used to drive the scrapers to rotate toward the other pressure plate. When the two sets of pressure plates come into contact, the scrapers slide against the side of the other pressure plate to scrape off the material adhering to the pressure plates.

[0015] Its effect is that when the pressure plate moves relative to another pressure plate, the torsion spring drives the scraper to rotate and abut against the side of the other set of pressure plates. At the same time, the scraper moves relative to the other scraper to scrape off the material that adheres to the pressure plate when the pressure plate squeezes the material.

[0016] Preferably, the middle position of the pressure plate is located between its rotating shaft and the scraper, so that when the two sets of pressure plates abut and move relative to each other, the scraper moves past the other set of pressure plates to clean it.

[0017] Its effect is that after the two sets of pressure plates come into contact, and when they rotate, they can drive the scraper to move past the other pressure plate to clean the other set of pressure plates.

[0018] Preferably, a top block is provided on the side of the pressure plate, the top block is located on the side of the pressure plate close to another pressure plate, the scraper is in an inclined state when it abuts against the top block, and the torsion spring at the connection between the scraper and the top block is used to drive the scraper to abut against the top block.

[0019] Its effect is that, in the initial state, the torsion spring drives the scraper to rotate until it abuts against the top block, so that the scraper is in an inclined state so that the scraper abuts against the side of another set of pressure plates, reducing the phenomenon of the scraper interfering with the movement of the pressure plates.

[0020] Preferably, the drive assembly includes: a drive component one, a transmission component, an intermediate shaft, and a mounting sleeve. The intermediate shaft and the mounting sleeve are both rotatably disposed inside the reaction vessel. The intermediate shaft is located in the middle of the reaction vessel, and the mounting sleeve rotatably abuts against the inner wall of the reaction vessel. A stirring plate one is connected to the intermediate shaft, and a stirring plate two is connected to the mounting sleeve. The drive component one is disposed outside the reaction vessel, and the output end of the drive component one is connected to the intermediate shaft and the mounting sleeve through the transmission component to drive the intermediate shaft and the mounting sleeve to rotate.

[0021] Its effect is that the drive component one drives the intermediate shaft and the mounting sleeve to rotate synchronously through the transmission component. The intermediate shaft drives the first stirring plate to rotate, and the mounting sleeve drives the second stirring plate to rotate, thereby mixing and stirring the materials.

[0022] Preferably, the transmission component includes: an internal gear ring, an external gear ring, an intermediate gear, and a bevel gear set. The internal gear ring is coaxially connected to the intermediate shaft, and the external gear ring is coaxially connected to the mounting sleeve. The internal gear ring and the external gear ring are arranged in the same plane. The intermediate gear is rotatably assembled in the reaction vessel. The intermediate gear is arranged between the internal gear ring and the external gear ring and meshes with both of them simultaneously. The bevel gear set is connected to the intermediate gear to drive the intermediate gear to rotate.

[0023] Its effect is that the drive unit 1 drives the intermediate gear to rotate through the bevel gear set. Since the intermediate gear meshes with the internal gear ring and the external gear ring at the same time, the intermediate gear drives the internal gear ring and the external gear ring to rotate at the same time, and drives the internal gear ring and the external gear ring to rotate in opposite directions. This in turn drives the mixing plate 1 and the mixing plate 2 to rotate in opposite directions, improving the mixing effect of the material. At the same time, it makes it easier for the two sets of pressure plates to approach each other and press against each other to squeeze the agglomerated material, so as to eliminate the agglomerated material.

[0024] Preferably, both the intermediate shaft and the mounting sleeve are hollow structures. An adjusting rod is slidably mounted inside the intermediate shaft, and an adjusting ring is slidably mounted inside the mounting sleeve. Both stirring plates one and two are provided with connecting rods. The connecting rod on stirring plate one is rotatably engaged with the intermediate shaft and extends into the intermediate shaft. The connecting rod on stirring plate two is rotatably engaged with the mounting sleeve and extends into the mounting sleeve. Both the adjusting rod and the adjusting ring are provided with adjusting grooves, and adjusting racks are provided in the adjusting grooves. An adjusting gear is coaxially provided on the connecting rod and meshes with the adjusting rack. A control component is provided inside the reaction vessel. The control component is connected to both the adjusting rod and the adjusting ring to drive the adjusting rod and the adjusting ring to move up and down.

[0025] Its effect is that the control component drives the adjusting rod and adjusting ring to move up and down synchronously. When the adjusting rod and adjusting ring move, they drive the adjusting rack to move. The adjusting rack drives the first and second mixing plates to rotate through the adjusting gear and connecting rod, so that the outer side of the first mixing plate flips to face the opposite side. Then the first driving component drives the intermediate shaft and mounting sleeve to rotate in the opposite direction, so as to drive the first and second mixing plates to rotate in opposite directions, thereby stirring the material in opposite directions, and further making the material more uniformly mixed.

[0026] Beneficial effects: 1. This invention uses a drive assembly to drive stirring plate one and stirring plate two to rotate synchronously and in opposite directions, stirring materials in different directions. Simultaneously, during stirring, it intercepts agglomerated materials. Under the action of stirring plate one, stirring plate two, and baffles, the agglomerated materials are guided to the pressure plate. The rotation of stirring plate one and stirring plate two causes two sets of pressure plates to come into contact with each other, squeezing the agglomerated materials between the two sets of pressure plates. As stirring plate one and stirring plate two continue to rotate, the two pressure plates rotate simultaneously while in contact, and each pressure plate moves relative to the other, kneading the agglomerated materials until the two pressure plates separate. Through the cooperation of the two sets of pressure plates, the agglomerated materials are eliminated, ensuring uniform heating of the materials and improving the yield of cracked oil.

[0027] 2. Scrapers are provided on both sets of pressure plates. When the two sets of pressure plates rotate while they are in contact, the pressure plates move relative to the other set of pressure plates. At the same time, the scrapers keep in contact with the pressure plates. The scrapers remove the material that is stuck to the pressure plates when the pressure plates are pressing the material, thereby improving the uniformity of the overall mixing of the material.

[0028] 3. The control component moves the adjusting rod and adjusting sleeve, and then drives the first and second mixing plates to rotate through the connecting rod, so that the first and second mixing plates face different directions. Subsequently, the first driving component drives the first and second mixing plates to rotate in different directions, so as to achieve mixing and stirring of materials in different directions, further improving the uniformity of material mixing, and making the material uniformly heated as a whole. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of an embodiment of the present invention.

[0030] Figure 2 This is a schematic diagram of the internal structure of the reaction vessel in an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram showing the positional relationship between stirring plate one and stirring plate two in an embodiment of the present invention.

[0032] Figure 4 This is a partial exploded view of the stirring plate and the pressure plate in an embodiment of the present invention.

[0033] Figure 5 This is a schematic diagram showing the state when the two pressure plates are in contact in an embodiment of the present invention.

[0034] Figure 6 This is a schematic diagram of the scraper structure in an embodiment of the present invention.

[0035] Figure 7 This is a schematic diagram of the transmission component in an embodiment of the present invention.

[0036] Figure 8 This is a schematic diagram of the control component in an embodiment of the present invention.

[0037] Figure 9 This is a schematic diagram of the adjustment rod and the intermediate shaft in an embodiment of the present invention.

[0038] Figure 10 This is a partially exploded schematic diagram of the connecting rod and adjusting rod in an embodiment of the present invention.

[0039] Figure label: 1. Frame; 2. Reaction vessel; 21. Baffle plate; 22. Feed pipe; 3. Stirring plate one; 31. Intermediate rod; 32. Intermediate groove; 33. Connecting rod; 331. Adjusting gear; 4. Stirring plate two; 5. Drive assembly; 51. Drive component one; 52. Transmission component; 521. Internal gear ring; 522. External gear ring; 523. Intermediate gear; 524. Bevel gear set; 53. Intermediate shaft; 54. Mounting sleeve; 6. Pressure plate; 61. Scraper; 62. Top block; 7. Baffle; 71. Through hole; 8. Adjusting rod; 81. Adjusting ring; 82. Adjusting groove; 83. Adjusting rack; 9. Control assembly; 91. Drive component two; 92. Control rack; 93. Control gear; 94. Control rod; 941. Connecting rod one; 942. Connecting rod two; 943. Crossbar; 944. Intermediate ring. Detailed Implementation

[0040] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] like Figures 1 to 10 As shown, the waste plastic pyrolysis reactor of the present invention includes a reaction tank 2 mounted on a frame 1. A stirring device for stirring the materials is provided inside the reaction tank 2. The stirring device includes a first stirring plate 3, a second stirring plate 4, and a drive assembly 5. The drive assembly 5 is connected to both the first stirring plate 3 and the second stirring plate 4, and drives the first stirring plate 3 and the second stirring plate 4 to rotate around the center of the reaction tank 2. During the pyrolysis treatment of waste plastics, the waste plastics are crushed and added to the reaction tank 2, then heated. Simultaneously, the drive assembly 5 drives the first stirring plate 3 and the second stirring plate 4 to stir the materials.

[0042] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 The first stirring plate 3 is positioned near the center of the reaction vessel 2, and the second stirring plate 4 is positioned near the inner wall of the reaction vessel 2. In addition, the driving component 5 drives the first stirring plate 3 and the second stirring plate 4 to rotate in opposite directions, that is, the rotation axis of the first stirring plate 3 is parallel to the rotation axis of the second stirring plate 4, so as to stir the material in the reaction vessel 2 in two opposite directions, so that the material is heated evenly, while increasing the shear force during stirring and reducing the phenomenon of material agglomeration.

[0043] Reference Figure 3 , Figure 4 , Figure 5A set of pressure plates 6 are rotatably installed at one end of both the first stirring plate 3 and the second stirring plate 4, close to each other. The connection method between the pressure plates 6 and the first stirring plate 3 is the same as the connection method between the pressure plates 6 and the second stirring plate 4. The following description focuses on the connection method between the pressure plates 6 and the first stirring plate 3.

[0044] Reference Figure 4 The rotation axis of the pressure plate 6 is perpendicular to the rotation axes of the first stirring plate 3 and the second stirring plate 4. An intermediate rod 31 is provided on the first stirring plate 3. The intermediate rod 31 is inserted into the pressure plate 6 and the pressure plate 6 is rotatably engaged with the intermediate rod 31. That is, the pressure plate 6 is rotatably engaged with the first stirring plate 3 through the intermediate rod 31.

[0045] Reference Figure 4 , Figure 5 , Figure 6 A torsion spring (not shown in the figure) is installed at the pivot of the pressure plate 6. The torsion spring is located between the intermediate rod 31 and the pressure plate 6 and is connected to both the intermediate rod 31 and the pressure plate 6. The torsion spring is used to drive the pressure plate 6 to rotate to a vertical position. The pivots of the two sets of pressure plates 6 are spaced apart in the vertical direction, that is, the intermediate rod 31 on the first stirring plate 3 and the intermediate rod 31 on the second stirring plate 4 are spaced apart in the vertical direction.

[0046] Reference Figure 3 , Figure 5 , Figure 6 As stirring plate 3 and stirring plate 4 rotate in opposite directions and approach each other, they cause the two sets of pressure plates 6 to come into contact with each other, squeezing the clumps of material between them. Simultaneously, stirring plate 3 and stirring plate 4 continue to rotate. Because the shafts of the two sets of pressure plates 6 are staggered in the vertical direction, the two sets of pressure plates 6 rotate around the central rod 31 while in contact, and also move relative to each other until they separate. After separation, a torsion spring causes the pressure plates 6 to rotate back to a vertical position. During the contact and relative movement of the two sets of pressure plates 6, the clumps of material are squeezed and kneaded to eliminate clumping, ensuring uniform heating during pyrolysis.

[0047] Reference Figure 3 , Figure 4 The mixing plate 3 is bent in the opposite direction of its rotation axis, while the mixing plate 4 is bent in the opposite direction of its rotation axis. Both mixing plates 3 and 4 are arc-shaped and bent in the opposite direction of their rotation. Mixing plates 3 and 4 have the same structure, with multiple intermediate grooves 32 running through them. This allows mixing plates 3 to intercept agglomerated materials during rotation. Simultaneously, the arc shape of both mixing plates 3 and 4 guides the intercepted agglomerated materials to the pressure plate 6 on their arc-shaped sides during rotation, facilitating subsequent processing by the pressure plate 6.

[0048] Reference Figure 4 , Figure 5 A baffle 7 is provided on the side of the pressure plate 6 away from the stirring plate 3, and multiple through holes 71 are provided on the baffle 7. The baffle 7 is used to intercept the agglomerated material, so that the agglomerated material gathers at the baffle 7, so that the pressure plate 6 can squeeze the agglomerated material.

[0049] The baffle 7 is rotatably connected to the pressure plate 6, and when the pressure plate 6 is in a vertical position, the axis of rotation of the baffle 7 is parallel to the axis of rotation of the stirring plate 3. A torsion spring is provided at the connection between the baffle 7 and the pressure plate 6, and the torsion spring is connected to both the baffle 7 and the pressure plate 6 to drive the baffle 7 to rotate to be perpendicular to the pressure plate 6.

[0050] Initially, baffle 7 is perpendicular to pressure plate 6. When pressure plate 6 approaches another set of pressure plates 6, baffle 7 abuts against the arc-shaped side of stirring plate 2 4. Stirring plate 1 3 and stirring plate 2 4 continue to rotate, pressing baffle 7 down. Baffle 7 rotates relative to pressure plate 6 until the two sets of pressure plates 6 abut against each other. By setting baffle 7 and pressure plate 6 in a rotatable connection, while baffle 7 intercepts agglomerated materials, baffle 7 can rotate relative to pressure plate 6, avoiding interference between baffle 7 and the abutment of the two sets of pressure plates 6.

[0051] Reference Figure 4 , Figure 6 Scrapers 61 are respectively provided on the upper side of the pressure plate 6 and on the lower side of the other pressure plate 6. A torsion spring is provided at the connection between the scraper 61 and the pressure plate 6. The torsion spring is connected to both the scraper 61 and the pressure plate 6 and is used to drive the scraper 61 to rotate towards the other pressure plate 6. When the two sets of pressure plates 6 abut against each other and move relative to each other, the torsion spring drives the scraper 61 to rotate until it abuts against the other set of pressure plates 6, and at the same time moves relative to the other set of pressure plates 6 to scrape off the material adhering to the pressure plate 6. This reduces the phenomenon of material adhering to the pressure plate 6 and affecting the overall mixing when the material is squeezed and agglomerated by the pressure plate 6.

[0052] Reference Figure 6 The intermediate rod 31 is located on one side of the middle position of the pressure plate 6. The middle position of the pressure plate 6 is the center position of the side of the pressure plate 6 closest to the mixing plate 3. The middle position of the pressure plate 6 is located between the intermediate rod 31 and the scraper 61. That is, the rotating shaft of the pressure plate 6 and the scraper 61 are respectively set on the upper and lower sides of the middle position of the pressure plate 6. So that when the two sets of pressure plates 6 are in contact and moving relative to each other, the scraper 61 can move past the other set of scrapers 61 to clean the material on the scraper 61.

[0053] Reference Figure 6A top block 62 is provided on the side of the pressure plate 6, located on the side of the pressure plate 6 closest to another set of pressure plates 6. The top block 62 is positioned on one side of the scraper 61, and a torsion spring on the scraper 61 causes the scraper 61 to abut against the top block 62. When the scraper 61 abuts against the top block 62, the scraper 61 is in an inclined state so that the scraper 61 abuts against the other set of pressure plates 6, reducing the phenomenon of the scraper 61 interfering with the abutment of the two sets of pressure plates 6.

[0054] Reference Figure 1 , Figure 2 Multiple sets of stirring plates 3 and 4 are arranged vertically, with each set consisting of stirring plates 3 and 4 arranged around the center of the reaction vessel 2. Each set of stirring plates 3 and 4 is positioned on the same horizontal plane. By simultaneously stirring the materials with multiple sets of stirring plates 3 and 4, the material is mixed and heated more evenly.

[0055] Reference Figure 1 , Figure 2 A baffle 21 is provided inside the reaction vessel 2. The baffle 21 is located near the top of the reaction vessel 2. A feed pipe 22 is provided on the reaction vessel 2. The feed pipe 22 passes through the baffle 21 and communicates with the inside of the reaction vessel 2. The material is added into the reaction vessel 2 through the feed pipe 22.

[0056] Reference Figure 1 , Figure 2 , Figure 7 The drive assembly 5 includes: a drive component 51, a transmission component 52, an intermediate shaft 53, and a mounting sleeve 54. The drive component 51 is located outside the reaction vessel 2 and is configured as a motor. The intermediate shaft 53 and the mounting sleeve 54 are both rotatably mounted inside the reaction vessel 2, and both the intermediate shaft 53 and the mounting sleeve 54 are rotatably engaged with the partition plate 21. The intermediate shaft 53 is located in the middle of the reaction vessel 2. The mounting sleeve 54 rotatably abuts against the inner wall of the reaction vessel 2, that is, the outer side of the mounting sleeve 54 abuts against the inner wall of the reaction vessel 2. The stirring plate 3 is connected to the intermediate shaft 53, and the stirring plate 4 is connected to the mounting sleeve 54. The transmission component 52 is mounted on the partition plate 21. The output end of the drive component 51 extends into the reaction vessel 2, and the output end of the drive component 51 is connected to the intermediate shaft 53 and the mounting sleeve 54 respectively through the transmission component 52.

[0057] The drive component 51 drives the intermediate shaft 53 and the mounting sleeve 54 to rotate through the transmission component 52. The rotation of the intermediate shaft 53 and the mounting sleeve 54 drives the stirring plate 3 and the stirring plate 4 to rotate respectively.

[0058] Reference Figure 1 , Figure 2 , Figure 7The transmission component 52 includes: an internal gear ring 521, an external gear ring 522, an intermediate gear 523, and a bevel gear set 524. The internal gear ring 521 is connected to the intermediate shaft 53, and the external gear ring 522 is connected to the mounting sleeve 54. The internal gear ring 521 is coaxially arranged with the intermediate shaft 53, and the external gear ring 522 is coaxially arranged with the mounting sleeve 54. The internal gear ring 521 and the external gear ring 522 are arranged in the same plane. The intermediate gear 523 is rotatably connected to the partition plate 21, that is, the intermediate gear 523 is rotatably arranged in the reaction tank 2. The internal gear ring 521 and the external gear ring 522 are spaced apart. The intermediate gear 523 is arranged between the internal gear ring 521 and the external gear ring 522 and meshes with both of them simultaneously. The bevel gear set 524 is connected to the intermediate gear 523.

[0059] The drive unit 51 drives the intermediate gear 523 to rotate through the bevel gear set 524. The rotation of the intermediate gear 523 simultaneously drives the intermediate shaft 53 and the mounting sleeve 54 to rotate in opposite directions, thereby driving the stirring plate 3 and the stirring plate 4 to rotate in different directions.

[0060] The lower end of the feed pipe 22 is located between the inner toothed ring 521 and the outer toothed ring 522, that is, the feed pipe 22 adds the material into the reaction vessel 2 through the space between the inner toothed ring 521 and the outer toothed ring 522.

[0061] Reference Figure 4 , Figure 8 , Figure 9 , Figure 10 Both stirring plate 3 and stirring plate 4 are provided with connecting rods 33. Stirring plate 3 is rotatably connected to intermediate shaft 53 through connecting rod 33, and stirring plate 4 is rotatably connected to mounting sleeve 54 through connecting rod 33. The rotation axis of connecting rod 33 is set perpendicular to the rotation axis of intermediate shaft 53.

[0062] Reference Figure 8 , Figure 9 , Figure 10 Both the intermediate shaft 53 and the mounting sleeve 54 are hollow structures. An adjusting rod 8 is slidably mounted up and down inside the intermediate shaft 53, and an adjusting ring 81 is slidably mounted up inside the mounting sleeve 54. Adjusting grooves 82 are provided on both the adjusting rod 8 and the adjusting ring 81. An adjusting rack 83 is provided in the adjusting groove 82. The end of the connecting rod 33 extends into the adjusting groove 82. An adjusting gear 331 is provided at the end of the connecting rod 33 near the adjusting groove 82. The adjusting gear 331 meshes with the adjusting rack 83.

[0063] During stirring, the adjusting rod 8 and adjusting ring 81 can be moved up and down, which in turn drives the adjusting gear 331 to rotate via the adjusting rack 83. The rotation of the adjusting gear 331 drives the connecting rod 33 to rotate, which in turn drives the first stirring plate 3 and the second stirring plate 4 to rotate, thus flipping the first stirring plate 3 and the second stirring plate 4. Then, the driving component 51 drives the first stirring plate 3 and the second stirring plate 4 to rotate in opposite directions, mixing and stirring the materials in different directions.

[0064] Multiple sets of adjusting grooves 82 are arranged vertically, and each set of adjusting grooves 82 corresponds to a set of stirring plates 3. When the adjusting rod 8 and the adjusting ring 81 move up and down, multiple stirring plates 3 and stirring plates 4 are adjusted simultaneously. Furthermore, when adjusting stirring plates 3 and 4, they rotate in the same direction, reducing interference between them.

[0065] Reference Figure 2 , Figure 8 A control component 9 is provided inside the reaction vessel 2. The control component 9 is connected to the adjusting rod 8 and the adjusting ring 81 and is used to adjust the position of the adjusting rod 8 and the adjusting ring 81.

[0066] Reference Figure 2 , Figure 8 The control component 9 includes: a second drive unit 91, a control rack 92, a control gear 93, and a control rod 94. The second drive unit 91 is a motor and is mounted on the partition plate 21. The control gear 93 is coaxially mounted at the output end of the second drive unit 91. The control rod 94 is connected to the adjusting rod 8 and the adjusting ring 81. The control rack 92 is connected to the control rod 94 and is arranged vertically. The second drive unit 91 drives the control gear 93 to rotate, the control gear 93 drives the control rack 92 to move up and down, the control rack 92 drives the control rod 94 to move up and down, which in turn drives the adjusting rod 8 and the adjusting ring 81 to move up and down, thereby adjusting the angle of the first stirring plate 3 and the second stirring plate 4 to stir the material in the reaction tank 2 in different directions.

[0067] Reference Figure 8 The control lever 94 includes: connecting rod 331, connecting rod 332, and crossbar 943. The control rack 92 is connected to the crossbar 943. Both connecting rod 331 and connecting rod 332 are connected to the crossbar 943. Connecting rod 331 extends into the intermediate shaft 53 and rotates with the adjusting rod 8. Connecting rod 332 extends into the mounting sleeve 54. An intermediate ring 944 is provided at the end of connecting rod 332 near the mounting sleeve 54. The intermediate ring 944 rotates with the adjusting ring 81. An annular opening is provided at the upper end of the mounting sleeve 54.

[0068] The intermediate shaft 53 and the mounting sleeve 54 rotate in opposite directions. At this time, connecting rod 33-1 and connecting rod 33-2 remain stationary, that is, connecting rod 33-2 rotates relative to the annular opening, and drives the intermediate ring 944 to rotate relative to the adjusting sleeve. When it is necessary to adjust the stirring direction, the driving component 2 91 drives the crossbar 943 to move. The crossbar 943 drives the adjusting rod 8 and the adjusting sleeve to move through connecting rod 33-1 and connecting rod 33-2, which in turn drives the stirring plate 1 3 and the stirring plate 2 4 to rotate. Then, the driving component 1 51 drives the intermediate shaft 53 and the mounting sleeve 54 to rotate in opposite directions, thus completing the adjustment of the stirring direction.

[0069] The implementation principle of this invention is as follows: the drive component 51 drives the intermediate gear 523 to rotate through the bevel gear set 524. The rotation of the intermediate gear 523 drives the internal gear ring 521 and the external gear ring 522 to rotate, thereby driving the intermediate shaft 53 and the mounting sleeve 54 to rotate in opposite directions, and in turn driving the stirring plate 3 and the stirring plate 4 to rotate in opposite directions to stir the material.

[0070] As the mixing plates 3 and 4 rotate, they intercept agglomerated material through the intermediate trough 32. Simultaneously, under the action of the arc-shaped sides of the mixing plates 3 and 4, the agglomerated material moves towards the pressure plate 6 and is then intercepted by the baffle 7 at the pressure plate 6. The mixing plates 3 and 4 rotate and move closer together until the two pressure plates 6 come into contact, compressing the agglomerated material. As the mixing plates continue to rotate, they cause the two pressure plates 6 to rotate while remaining in contact, and simultaneously move relative to each other until the two pressure plates 6 separate. During this separation process, the two pressure plates 6 knead the agglomerated material to better eliminate it. This reduces the agglomerated material from affecting pyrolysis and improves the yield of pyrolyzed oil.

[0071] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A waste plastic pyrolysis reaction apparatus, comprising a stirring device disposed within a reaction tank (2), characterized in that, The stirring device includes: stirring plate one (3), stirring plate two (4), and drive assembly (5); the drive assembly (5) is connected to stirring plate one (3) and stirring plate two (4) respectively, so as to drive stirring plate one (3) and stirring plate two (4) to rotate around the center of reaction tank (2); stirring plate one (3) is set close to the center of reaction tank (2), stirring plate two (4) is set close to the inner wall of reaction tank (2), and stirring plate one (3) and stirring plate two (4) rotate in opposite directions; stirring plate one (3) and stirring plate two (4) (4) A set of pressure plates (6) are rotatably provided at the ends close to each other. The axis of rotation of the pressure plate (6) is perpendicular to the axis of rotation of the first stirring plate (3). The axes of rotation of the two sets of pressure plates (6) are spaced apart in the vertical direction. A torsion spring is provided at the axis of rotation of the pressure plate (6) to drive the pressure plate (6) to rotate to the vertical state. When the first stirring plate (3) and the second stirring plate (4) are close to each other, the two sets of pressure plates (6) abut and rotate. At the same time, the two sets of pressure plates (6) move relative to each other until they separate, so as to squeeze the agglomerated material between the two sets of pressure plates (6).

2. The waste plastic pyrolysis reactor according to claim 1, characterized in that, The stirring plate one (3) is bent in the direction opposite to its rotation direction on the side away from its axis of rotation, and the stirring plate two (4) is bent in the direction opposite to its rotation direction on the side close to the axis of rotation.

3. The waste plastic pyrolysis reactor according to claim 2, characterized in that, A baffle (7) is provided on the side of the pressure plate (6) away from the stirring plate (3), and multiple through holes (71) are provided on the baffle (7).

4. The waste plastic pyrolysis reactor according to claim 3, characterized in that, The baffle (7) is rotatably connected to the pressure plate (6). The axis of rotation of the baffle (7) is parallel to the axis of rotation of the stirring plate (3). A torsion spring is provided at the connection between the baffle (7) and the stirring plate (3) to drive the baffle (7) to rotate perpendicular to the pressure plate (6).

5. The waste plastic pyrolysis reactor according to claim 2, characterized in that, Scrapers (61) are provided on the upper and lower sides of the two sets of pressure plates (6). A torsion spring is provided at the connection between the scraper (61) and the pressure plate (6). The torsion spring is used to drive the scraper (61) to rotate in the direction of the other pressure plate (6). When the two sets of pressure plates (6) come into contact, the scraper (61) slides against the side of the other pressure plate (6) to scrape off the material adhering to the pressure plate (6).

6. The waste plastic pyrolysis reactor according to claim 5, characterized in that, The middle position of the pressure plate (6) is located between its rotating shaft and the scraper (61). When the two sets of pressure plates (6) come into contact and move relative to each other, the scraper (61) moves past the other set of pressure plates (6) to clean it.

7. The waste plastic pyrolysis reactor according to claim 5, characterized in that, A top block (62) is provided on the side of the pressure plate (6). The top block (62) is located on the side of the pressure plate (6) close to another pressure plate (6). When the scraper (61) abuts against the top block (62), the scraper (61) is in an inclined state. The torsion spring at the connection between the scraper (61) and the top block (62) is used to drive the scraper (61) to abut against the top block (62).

8. The waste plastic pyrolysis reactor according to claim 1, characterized in that, The drive assembly (5) includes: drive component one (51), transmission component (52), intermediate shaft (53), and mounting sleeve (54). The intermediate shaft (53) and mounting sleeve (54) are rotatably disposed inside the reaction vessel (2). The intermediate shaft (53) is located in the middle of the reaction vessel (2). The mounting sleeve (54) rotates and abuts against the inner wall of the reaction vessel (2). The stirring plate one (3) is connected to the intermediate shaft (53). The stirring plate two (4) is connected to the mounting sleeve (54). The drive component one (51) is disposed outside the reaction vessel (2). The output end of the drive component one (51) is connected to the intermediate shaft (53) and the mounting sleeve (54) through the transmission component (52) to drive the intermediate shaft (53) and the mounting sleeve (54) to rotate.

9. The waste plastic pyrolysis reactor according to claim 8, characterized in that, The transmission component (52) includes: an internal gear ring (521), an external gear ring (522), an intermediate gear (523), and a bevel gear set (524). The internal gear ring (521) is coaxially connected to the intermediate shaft (53), and the external gear ring (522) is coaxially connected to the mounting sleeve (54). The internal gear ring (521) and the external gear ring (522) are arranged in the same plane. The intermediate gear (523) is rotatably assembled in the reaction vessel (2). The intermediate gear (523) is arranged between the internal gear ring (521) and the external gear ring (522) and meshes with both of them simultaneously. The bevel gear set (524) is connected to the intermediate gear (523) to drive the intermediate gear (523) to rotate.

10. The waste plastic pyrolysis reactor according to claim 8, characterized in that, Both the intermediate shaft (53) and the mounting sleeve (54) are hollow structures. An adjusting rod (8) is slidably mounted inside the intermediate shaft (53), and an adjusting ring (81) is slidably mounted inside the mounting sleeve (54). A connecting rod (33) is provided on both the first stirring plate (3) and the second stirring plate (4). The connecting rod (33) on the first stirring plate (3) rotates with the intermediate shaft (53) and extends into the intermediate shaft (53). The connecting rod (33) on the second stirring plate (4) rotates with the mounting sleeve (54). The adjusting rod (8) and the adjusting ring (81) are both provided with adjusting grooves (82) and adjusting racks (83) respectively. The adjusting rod (33) is coaxially provided with adjusting gears (331) that mesh with the adjusting racks (83). The reaction tank (2) is provided with a control component (9). The control component (9) is connected to both the adjusting rod (8) and the adjusting ring (81) to drive the adjusting rod (8) and the adjusting ring (81) to move up and down.

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