Waste polymer plastic recovery device and method for chemical reuse

Abstract

The application discloses a kind of waste polymer plastics recycling device and method for chemical recycling, it is related to plastic waste recycling technical field, the device includes installation support, granulating device, storage tank and spiral conveying device, its innovation lies in by annular electric slide rail drive intermittent feeding mechanism, make concave bin periodic close to the bottom of storage tank and accept plastic particles, and cooperate multifunctional board partition storage tank, opening and closing mechanism control cover open and close, realize accurate quantitative material taking;Concave bin is far away by tilting and discharging mechanism and is poured into spiral conveying device.The device adopts gear-rack linkage and spring column design, realizes the mechanical self-feedback telescoping and reset of concave bin, combined with circulating belt driven multifunctional board synchronous action, effectively avoid particle leakage and friction temperature rise.The application is optimized by intermittent conveying and mechanical linkage, solves the problem of high energy consumption, thermal sensitive material degradation and equipment wear caused by traditional continuous conveying.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic waste recycling, in particular to a waste high polymer plastic recycling device and method for chemical recycling. BACKGROUND

[0002] The recycling of waste high polymer plastics is a complex process involving multiple steps, aiming to convert waste plastic products into reusable resources. First, the waste high polymer plastics need to go through a pretreatment stage, which mainly includes breaking down large pieces of plastic into smaller fragments for subsequent processing. At the same time, the pretreatment process also includes a cleaning step to remove impurities and contaminants on the surface of the plastic fragments, ensuring the purity of the recycled plastics. The pretreated plastic fragments will enter the homogenization treatment stage. This stage usually achieves uniformity of plastic particles by melting and extruding the plastic fragments into uniform granules. Homogenization treatment not only improves the uniformity of plastic particles, but also provides convenient conditions for subsequent chemical treatment. The homogenized plastic particles will enter the chemical cracking stage. In this stage, plastic particles undergo chemical decomposition under specific reaction conditions (such as high temperature, high pressure, or the action of catalysts), generating small molecular compounds or monomers. These products can be further used to synthesize new high molecular materials or other chemicals, thereby realizing the chemical recycling of waste high polymer plastics.

[0003] However, in the prior art, when the homogenized plastic particles are transported to the reaction kettle, due to factors such as gravity flow design, pressure balance, and the fact that the high-level feed inlet can utilize gravity to completely empty the reaction kettle, the reaction kettle feed inlet is often set at a high level. When the pretreated waste plastics are transported at a high level by the screw conveyor, a large amount of heat is easily generated due to the continuous friction between the screw blades and the material, resulting in an excessively high temperature inside the conveyor. This overheating phenomenon not only may accelerate the degradation of plastic particles, affecting the effect of chemical cracking and the quality of the products, but also may cause damage to the screw conveyor itself, shortening its service life. In addition, overheating may also cause safety hazards such as fire or explosion, posing a threat to the production environment and personnel safety.

[0004] Therefore, we propose a waste high polymer plastic recycling device and method for chemical recycling. SUMMARY

[0005] The purpose of the present application is to provide a waste high polymer plastic recycling device and method for chemical recycling to solve the above-mentioned deficiencies in the prior art.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a waste polymer plastic recovery device for chemical reuse, comprising a mounting bracket, and a granulation device, a storage box, and a screw conveyor device arranged on the mounting bracket, wherein the storage box is used to temporarily store plastic particles discharged from the granulation device, and the waste polymer plastic recovery device for chemical reuse further comprises:

[0007] An annular electric slide rail is provided on the side support, and a concave bin is installed on the annular electric slide rail through an intermittent feeding mechanism. When the annular electric slide rail is in the started state, the intermittent feeding mechanism causes the concave bin to rotate in an annular shape and approach the storage box, so that the concave bin extends toward the bottom of the storage box to receive the plastic particles.

[0008] The multifunctional plate and the opening and closing mechanism are arranged on the mounting bracket by a driving member, and the opening and closing mechanism is further provided with a cover plate rotatably connected to the bottom opening of the storage box. When the concave bin moves close to the storage box, the driving member is driven by the intermittent feeding mechanism to insert the multifunctional plate into the storage box to form a segmentation. After that, the cover plate is opened by the opening and closing mechanism to enable the concave bin to receive the plastic particles below the segmented multifunctional plate.

[0009] The tilting discharge mechanism is arranged between the concave bin and the side support. When the concave bin moves away from the storage box, the tilting discharge mechanism tilts the concave bin and pours the received plastic particles into the screw conveyor.

[0010] As a further description of the above technical solution: the intermittent feeding mechanism includes a sliding seat arranged on a ring-shaped electric slide rail and a shelf fixed on the sliding seat, and the concave bin is movably arranged on the shelf;

[0011] The intermittent feeding mechanism also includes rack 1 and rack 2 which are slidably arranged on the sliding seat, and gear 2 which is rotatably arranged on the sliding seat. Gear 2 is arranged between rack 1 and rack 2 and is simultaneously engaged with rack 1 and rack 2. Rack 2 is rotatably connected to the concave bin through a connecting frame. A pressure plate is provided at one end of the rack, and the pressure plate is connected to the sliding seat through a spring column. A traction plate is also provided on the mounting bracket. When the sliding seat moves close to the storage box, the pressure plate and the surface of the traction plate are pressed against each other.

[0012] As a further description of the above technical solution: the driving member is a circulating belt arranged on the mounting bracket, and a gear 1 is installed on the outer surface of the rotating shaft of the circulating belt near the traction plate. When the traction plate contacts the pressure plate and moves to the maximum stroke, the gear 1 engages with the teeth on the surface of the pressure plate.

[0013] As a further description of the above technical solution: the waste polymer plastic recovery device for chemical reuse also includes a vertical bar fixed on the side bracket. When the traction plate contacts the pressure plate and moves to the maximum stroke, the vertical bar is used to limit the pressure plate.

[0014] As a further description of the above technical solution: the multifunctional plate is arranged on the upper surface of the circulating belt, and the opening and closing mechanism is arranged on the lower surface of the circulating belt. When the gear 1 meshes with the teeth on the pressure plate and causes the circulating belt to rotate, the multifunctional plate is inserted into the storage box to form an independent cavity below, and the opening and closing mechanism is separated from the cover plate.

[0015] As a further description of the above technical solution: when the sliding seat moves along the annular electric slide rail to a position away from the storage box, the surface of the pressure plate abuts against the vertical bar, and gear 1 engages with the teeth on the pressure plate again.

[0016] As a further description of the above technical solution: the opening and closing mechanism is slidably arranged on a mounting bracket and is connected to a sliding frame on the lower surface of the circulating belt, and the sliding frame is provided with a contact roller that abuts against the bottom surface of the cover plate.

[0017] As a further description of the above technical solution: a limit plate is further provided on the storage box body, and when the cover is opened, the limit plate is used to limit the opening angle of the cover.

[0018] As a further description of the above technical solution: the inclined material discharge mechanism includes a material guide plate 1 arranged on the side bracket and a material guide plate 2 arranged on the top side of the material guide plate 1 by rotating through a torsion spring. The concave bin is provided with an extension plate close to the screw conveying device side, and the extension plate is provided with a groove adapted to the material guide plate 1.

[0019] A method for recovering waste polymer plastics for chemical reuse, applied to the above-mentioned waste polymer plastic recovery device for chemical reuse, comprises the following steps:

[0020] Step 1: After pre-treatment, the waste polymer plastics are homogenized by a granulation device. The polymer plastic particles after homogenization are temporarily stored in a storage box;

[0021] Step 2: Start the circular electric slide rail to make the intermittent feeding mechanism drive the concave bin to move in a circular motion;

[0022] Step 3: When the concave bin moves to a position close to the storage box, the intermittent feeding mechanism extends the concave bin toward the bottom of the storage box. At the same time, the intermittent feeding mechanism uses the driving member to separate the storage box with the multifunctional plate, and then the opening and closing mechanism opens the cover plate, allowing the plastic particles under the multifunctional plate to enter the concave bin;

[0023] Step four: when the concave bin moves away from the storage box position, the plastic particles in the concave bin are poured into the screw conveyor for height conveying by tilting the discharging mechanism, and the multifunctional plate and the cover plate are restored to the initial position again by the intermittent feeding mechanism through the driving member.

[0024] In the above technical solution, the waste high-molecular plastic recycling device and method for chemical recycling provided by the application has the following beneficial effects:

[0025] 1. By designing the annular electric sliding rail and the intermittent feeding mechanism, the concave bin can accurately extend downward when close to the storage box to receive the plastic particles and prevent spilling. This design ensures that the plastic particles can be efficiently and accurately transferred from the storage box to the concave bin, improving the overall conveying efficiency.

[0026] 2. Before the concave bin receives the plastic particles, the multifunctional plate is first inserted into the storage box for separation, and then the opening and closing mechanism opens the cover plate to make the plastic particles located below the multifunctional plate fall into the concave bin. This design effectively prevents excess plastic particles from spilling at once due to gravity, avoiding the problem of exceeding the carrying capacity of the concave bin. In the initial stage when the multifunctional plate opens outward to remove the separation, that is, after the cover plate is resisted by the resisting roller and begins to close, the blocking block delays the falling of the waste plastic particles. After the cover plate is closed and the multifunctional plate moves away from the blocking block, the plastic particles will fall, further preventing the problem of plastic particles falling. Moreover, when the cover plate is closed, the multifunctional plate is still in a state of separating the storage box. At this time, the multifunctional plate and the cover plate are not filled with plastic particles, thereby reducing the closing pressure of the cover plate and improving the overall stability.

[0027] 3. By intermittently conveying the plastic particles, the continuous friction between the screw blades and the material is avoided, significantly reducing the conversion efficiency of mechanical energy to heat energy. This design not only reduces mechanical wear and extends the service life of the equipment, but also reduces energy consumption and improves energy utilization efficiency. The non-continuous material flow formed by intermittent conveying leaves a heat dissipation window for the conveying gap of the material in the screw conveyor, allowing the temperature gradient between the screw groove and the particle surface to be quickly dissipated through air convection or an external cooling system. This is particularly important for processing low-melting-point plastics or materials containing volatile components, helping to maintain the material within a suitable temperature range for conveying. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings described below are only some embodiments described in the application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0029] Figure 1 Overall structural schematic diagram provided for the embodiment of the present application;

[0030] Figure 2 Partial structural schematic diagram provided for the embodiment of the present application;

[0031] Figure 3 Partial structural schematic diagram provided for the embodiment of the present application from another angle;

[0032] Figure 4 Partial structural schematic diagram provided for the embodiment of the present application from a third angle;

[0033] Figure 5 Structural schematic diagram of the storage box provided for the embodiment of the present application;

[0034] Figure 6 Structural schematic diagram of the circulating feeding mechanism provided for the embodiment of the present application;

[0035] Figure 7 Structural schematic diagram of the circulating feeding mechanism provided for the embodiment of the present application; Figure 6 Structural schematic diagram of the circulating feeding mechanism provided for the embodiment of the present application;

[0036] Figure 8 Structural schematic diagram of the circulating feeding mechanism provided for the embodiment of the present application;

[0037] Figure 9 Structural schematic diagram of the circulating feeding mechanism provided for the embodiment of the present application;

[0038] Figure 10 Structural schematic diagram of the circulating feeding mechanism provided for the embodiment of the present application;

[0039] Explanation of reference numerals:

[0040] 1, mounting bracket; 2, multifunctional plate; 3, circulating belt; 31, gear one; 4, granulating device; 5, spiral conveying device; 6, annular electric sliding rail; 61, sliding seat; 62, spring column; 63, traction plate; 64, pressure receiving plate; 65, rack one; 66, shelf; 67, concave bin; 68, gear two; 69, rack two; 610, connecting shelf; 7, side stand; 8, sliding shelf; 81, abutting roller; 82, limiting plate; 83, cover plate; 9, storage box; 10, vertical bar; 11, guide plate; 12, extension plate; 121, missing slot; 122, guide plate one; 123, guide plate two; 13, blocking block. DETAILED DESCRIPTION

[0041] In order for those skilled in the art to better understand the technical solutions of the present application, the present application will be further described in detail below with reference to the drawings.

[0042] Please refer toFigures 1-9 , an embodiment of the present invention provides a technical solution: a waste polymer plastic recycling device for chemical reuse, comprising a mounting bracket 1, and a granulating device 4, a storage box 9 and a screw conveying device 5 arranged on the mounting bracket 1, the storage box 9 is used to temporarily store the plastic particles discharged by the granulating device 4, when recycling the waste polymer plastic, it is first necessary to pre-treat the polymer plastic to process large pieces of plastic into small pieces of plastic, and to clean it to remove impurities, and in order to further chemically treat the polymer plastic, it is necessary to use the granulating device 4 to melt and granulate the plastic particles to ensure that the material is evenly heated during the subsequent chemical decomposition and to improve the homogenization effect, and the homogenized plastic-grade particles after granulation enter the storage box 9 at the bottom through the discharge port of the granulating device 4;

[0043] In order to transport the homogenized waste polymer plastic in the storage box 9 to the spiral conveying device 5, so as to transport the waste plastic particles at a high speed, thereby performing a chemical cracking operation through the reactor, the waste polymer plastic recovery device for chemical reuse also includes: an annular electric slide rail 6 arranged on the side support 7, and a concave bin 67 is installed on the annular electric slide rail 6 through an intermittent feeding mechanism. When the annular electric slide rail 6 is in the started state, the intermittent feeding mechanism causes the concave bin 67 to rotate in a circular shape and, when it approaches the storage box 9, the concave bin 67 extends toward the bottom of the storage box 9 to receive the plastic particles. In this way, the intermittent feeding mechanism can be used to extend the concave bin 67 toward the bottom of the storage box 9 when it approaches the bottom of the storage box 9, thereby receiving the plastic particles, thereby preventing the waste plastic particles from being scattered due to a gap between the storage box 9 and the concave bin 67.

[0044] In order to further improve the effect of conveying the waste plastic particles to the position of the spiral conveying device 5, the waste polymer plastic recovery device for chemical reuse is further provided with a multifunctional plate 2 and an opening and closing mechanism on the mounting bracket 1 through a driving member. The opening and closing mechanism is further provided with a cover plate 83 rotatably connected to the bottom opening of the storage box 9. When the concave bin 67 moves close to the storage box 9, the driving member is driven by the intermittent feeding mechanism to insert the multifunctional plate 2 into the storage box 9 to form a segmentation. After that, the cover plate 83 is opened through the opening and closing mechanism to enable the concave bin 67 to receive the plastic particles below the multifunctional plate 2 after segmentation.

[0045] That is, before the waste plastic particles in the storage box 9 are received by the concave bin 67, the intermittent feeding mechanism causes the driving member to drive the multi-function board 2 to be inserted into the storage box 9. After the multi-function board 2 is inserted and the partition is formed, the cover 83 is opened by the opening and closing mechanism, so that the waste plastic particles below the multi-function board 2 fall into the concave bin 67 under the action of gravity, thereby preventing the excess plastic particles from falling beyond the carrying capacity of the concave bin 67 and causing the plastic particles to spill.

[0046] After the plastic particles are received by the concave bin 67, the concave bin 67 moves away from the storage box 9 due to the continuous driving of the annular electric slide rail 6, and a tilting discharge mechanism is provided between the concave bin 67 and the side stand 7. In this way, when the concave bin 67 moves away from the storage box 9, the tilting discharge mechanism tilts the concave bin 67 and pours the received plastic particles into the feed port of the screw conveyor 5. Then, the screw conveyor 5 transports the waste plastic particles at a high speed and transports them to the cracking furnace or reactor to chemically crack the waste polymer plastics so as to chemically reuse the polymer plastics.

[0047] In this way, as the annular electric slide rail 6 is continuously driven, the intermittent feeding mechanism drives the concave bin 67 to rotate continuously along the annular electric slide rail 6. Therefore, the waste plastic particles in the storage box 9 can be periodically transported to the spiral conveying device 5 through the concave bin 67, and the waste plastic particles can be transported at a high level in stages through the spiral conveying device 5. The waste plastic particles are put into the spiral conveying device 5 in discrete batches, so that the material is distributed in sections in the spiral groove instead of being continuously filled. This fundamentally reconstructs the material flow pattern of the traditional screw conveyor. Its advantages are: it avoids the friction between the spiral blades and the material. Continuous friction significantly reduces the efficiency of converting mechanical energy into thermal energy, while also creating a heat dissipation window for the material in the conveying gap of the screw conveyor 5. This allows the temperature gradient between the spiral trough and the particle surface to be quickly dissipated through air convection or an external cooling system. This is particularly suitable for processing low-melting-point plastics (such as LDPE) or materials containing volatile components. At the same time, the discontinuous material flow formed by intermittent conveying can reduce the fluctuation amplitude of the spiral bearing load, reduce mechanical fatigue caused by long-term full-load operation, and extend the life of key components. Moreover, the entire intermittent feeding process of waste plastic particles is automated, reducing the demand for manpower and achieving better performance.

[0048] In one embodiment of the present invention, the intermittent feeding mechanism includes a sliding seat 61 provided on the annular electric slide 6 and a shelf 66 fixed to the sliding seat 61. The concave bin 67 is movably provided on the shelf 66. When the annular electric slide 6 is in the starting state, the sliding seat 61 provided thereon can drive the shelf 66 and the concave bin 67 to rotate cyclically.

[0049] The intermittent feeding mechanism also includes a rack 1 65 and a rack 2 69 slidably arranged on the sliding seat 61, and a gear 2 68 rotatably arranged on the sliding seat 61. The gear 2 68 is arranged between the rack 1 65 and the rack 2 69 and is simultaneously engaged with the rack 1 65 and the rack 2 69. The rack 2 69 is rotatably connected to the concave bin 67 through the connecting frame 610. A pressure plate 64 is provided at the end of the rack 1 65, and the pressure plate 64 is connected to the sliding seat 61 through a spring column 62. A traction plate 63 is also provided on the mounting bracket 1. When the sliding seat 61 moves close to the storage box 9, the pressure plate 64 is pressed against the surface of the traction plate 63. Here, please refer to Figure 9 , which is a front view of the traction plate 63. When the sliding seat 61 rotates on the annular electric slide rail 6, when the pressure plate 64 abuts against the upper inclined portion of the traction plate 63, the pressure plate 64 is compressed, the spring column 62 is compressed and deformed, and the pressure plate 64 pushes the rack 1 65 to move on the sliding seat 61, thereby pushing the concave groove to extend toward the bottom of the storage box 9 through the gear 2 68 and the rack 2 69, so as to facilitate the reception of the waste plastic particles in the storage box 9 and prevent the waste plastic particles from being spilled due to the gap between the storage box 9 and the concave bin 67;

[0050] In another embodiment of the present invention, the driving member is an endless belt 3 arranged on the mounting bracket 1, and a gear 31 is installed on the outer surface of the rotating shaft of the endless belt 3 near the traction plate 63. When the traction plate 63 contacts the pressure plate 64 and moves to the maximum stroke, that is, when the pressure plate 64 and the plane surface of the traction plate 63 are in contact, the gear 31 is engaged with the teeth on the surface of the pressure plate 64. In this way, when the sliding seat 61 continues to move with the annular electric slide rail 6, the endless belt 3 can be rotated by the cooperation of the gear and the teeth on the surface of the pressure plate 64, and the multi-function plate 2 is arranged on the upper surface of the endless belt 3, and the opening and closing mechanism is arranged on the circulating belt 3. The lower surface of the endless belt 3, in this way, when the endless belt 3 rotates, the rotating endless belt 3 can make the multifunctional board 2 be inserted into the storage box 9 to form a separation between the upper and lower spaces in the storage box 9. After the separation is formed, the cover 83 is opened by the opening and closing mechanism, so that the waste plastic particles below the multifunctional board 2 in the storage box 9 fall into the concave bin 67 under the action of gravity, so that the concave bin 67 can receive the waste plastic particles, and the storage box 9 is separated by the multifunctional board 2, so as to prevent a large amount of excess waste plastic particles from falling under the action of gravity and causing the problem of exceeding the bearing limit of the concave bin 67;

[0051] It should be noted here that, since the pressure plate 64 and the sliding seat 61 are connected by the spring column 62, in order to improve the stability of the teeth on the pressure plate 64 when meshing with the gear 1 31, the waste polymer plastic recycling device for chemical reuse further includes a vertical bar 10 fixed to the side bracket 7. When the traction plate 63 abuts against the pressure plate 64 and moves to the maximum stroke, the vertical bar 10 is used to limit the pressure plate 64. That is, when the pressure plate 64 abuts against the spring column 62 to the maximum stroke under the abutment of the traction plate 63, the pressure plate 64 abuts against the vertical bar 10. At this time, under the abutment of the flat surface of the traction plate 63 and the vertical bar 10, the pressure plate 64 is equivalent to being limited, so that the meshing of the teeth on the pressure plate 64 and the gear 1 31 is more stable, thereby preventing vibration.

[0052] After the concave bin 67 receives the waste plastic particles in the storage box 9 at the bottom of the multi-function board 2, it continues to move along the annular electric slide rail 6 under the drive of the sliding seat 61, so that the pressure plate 64 contacts the inclined surface below the traction plate 63, and the spring column 62 gradually recovers its deformation, thereby restoring the concave bin 67 to its original position through the rack 1 65, gear 2 68 and rack 2 69 on the pressure plate 64;

[0053] As the annular electric slide 6 is driven, the sliding seat 61 moves along the annular electric slide 6 with the concave bin 67 containing the waste feed particles thereon. When the annular electric slide 6 rotates to a position away from the storage box 9, the surface of the pressure plate 64 abuts against the vertical bar 10, and the gear 1 31 engages with the teeth on the pressure plate 64 again. At this time, the circulating belt 3 rotates in the opposite direction, thereby restoring the multi-function plate 2 and the cover plate 83 to their initial positions. It should be noted here that in order to allow the concave bin 67 to extend toward the bottom of the storage box 9 to better receive the plastic particles, the teeth on the pressure plate 64 are staggered with the gear 1 31 in the initial state. , and it is this staggered distance that allows the concave bin 67 to extend, and when the sliding seat 61 moves along the annular electric slide rail 6 to the side away from the storage box 9, the staggered distance just fills the distance between the sliding seat 61 and the storage box 9 along the annular electric slide rail 6, so that the teeth on the pressure plate 64 can just mesh with the gear 1 31 to restore the circulating belt 3 to its initial position. Through the spatial posture matching of the mechanical components themselves, the synchronization of the telescopic movement of the concave bin 67 and the movement phase of the slide rail is achieved without relying on sensors or external power intervention, which not only simplifies the control system, but also ensures the accuracy and repeatability of the movement through a purely mechanical self-feedback mechanism.

[0054] In still another embodiment of the present application, the opening and closing mechanism slidingly arranged on the mounting bracket 1 and connected with the lower surface of the circulating belt 3 is a sliding frame 8, which is provided with a contact roller 81 abutting against the bottom surface of the cover plate 83. In the stage of receiving the waste plastic particles in the storage box 9 through the concave bin 67, with the movement of the circulating belt 3, the multifunctional plate 2 is gradually inserted into the storage box 9 to form a partition, at the same time, the sliding frame 8 drives the contact roller 81 to move in the opposite direction of the multifunctional plate 2, but because the contact roller 81 continuously abuts against the surface of the cover plate 83, the cover plate 83 will not be immediately opened, but will be opened when the contact roller 81 is completely separated from the cover plate 83, so as to discharge the waste plastic particles. Such a design is to prevent the problem of excessive waste plastic leakage caused by the opening of the cover plate 83 when the multifunctional plate 2 does not completely form a partition to the storage box 9;

[0055] When the circulating belt 3 moves in the opposite direction, the sliding frame 8 pushes the contact roller 81 to directly abut against the bottom of the cover plate 83 again, and directly makes the cover plate 83 close through the pushing force, and then the contact roller 81 slides towards the end of the cover plate 83 under the driving of the circulating belt 3, while the multifunctional plate 2 gradually expands to remove the partition to the storage box 9, so that the waste plastic particles are filled to the bottom of the storage box 9 again. Through such reciprocating, the waste plastic particles can be continuously and intermittently transported;

[0056] And the amount of each transportation is the waste plastic particles stored in the storage box 9 below the multifunctional plate 2, which effectively controls the transportation amount of the waste plastic particles each time, and when the circulating belt 3 rotates in the opposite direction, the cover plate 83 can be quickly closed to prevent the problem of the waste plastic above falling out along the opening of the cover plate 83 after the multifunctional plate 2 is opened. In order to further optimize this problem, please refer to Figure 10 The blocking block 13 is also arranged on the inner wall surface of the storage box 9. In the initial stage of the multifunctional plate 2 opening outward to remove the partition, that is, the stage of the cover plate 83 starting to close after being abutted by the contact roller 81, the blocking block 13 delays the falling of the waste plastic particles, until the cover plate 83 is closed and the multifunctional plate 2 is away from the blocking block 13, the plastic particles will fall, further preventing the problem of plastic particles falling. Moreover, when the cover plate 83 is closed, the multifunctional plate 2 is still in the partition state to the storage box 9, and the multifunctional plate 2 is not filled with plastic particles between the cover plate 83, so as to slow down the closing pressure of the cover plate 83 and improve the overall stability;

[0057] In still another embodiment of the present application, the tilting feeding mechanism comprises a guide plate one 122 arranged on the side stand 7 and a guide plate two 123 arranged on the top side of the guide plate one 122 through a torsional spring, the extension plate 12 is arranged close to the side of the screw conveyor 5, the extension plate 12 is provided with a slot 121 matched with the guide plate one 122, when the sliding seat 61 moves to a position away from the storage box 9 along the annular electric sliding rail 6, the surface of the slot 121 of the extension plate 12 on the concave bin 67 abuts against the guide plate one 122, and as the sliding seat 61 and the concave bin 67 continue to move upwards, the concave bin 67 is gradually deflected under pressure, and the surface gradually abuts against the end of the guide plate two 123, at this time, the concave bin 67, the guide plate two 123 and the guide plate one 122 form a channel, and the waste plastic particles are poured out through the channel as the concave bin 67 gradually tilts, and a guide plate 11 is further arranged between the side stand 7 and the feeding port of the screw conveyor 5, the poured waste plastic particles enter the screw conveyor 5 along the guide plate 11 for height transportation, and after the concave bin 67 is deflected to the maximum angle and passes through the guide plate one 122 and the guide plate two 123, the concave bin 67 returns to the original position, and then the concave bin 67 moves along with the annular electric sliding rail 6, so as to continuously and intermittently transport the waste plastic particles in the storage box 9 to the position of the screw conveyor 5 for height transportation, and the waste plastic particles are chemically cracked in the reaction kettle, so as to facilitate the subsequent treatment of the waste high molecular plastic.

[0058] It should be further pointed out that the storage box 9 is further provided with a limiting plate 82, which is used to limit the opening angle of the cover plate 83 when the cover plate 83 is opened, so as to prevent the opening angle from being too large and difficult to close.

[0059] The screw conveyor 5 and the granulating device 4 described above are both prior art and will not be described in detail.

[0060] A waste high molecular plastic recycling method for chemical reuse, applied to the waste high molecular plastic recycling device for chemical reuse, comprising the following steps:

[0061] Step one: the waste high molecular plastic is pretreated and then subjected to homogenization treatment through the granulating device 4, and the high molecular plastic particles after the homogenization treatment are temporarily stored in the storage box 9;

[0062] Step two: start the annular electric sliding rail 6 to drive the concave bin 67 to move annularly;

[0063] Step three: when the concave bin 67 moves to the position close to the storage box 9, the intermittent feeding mechanism makes the concave bin 67 extend to the bottom of the storage box 9, at the same time, the intermittent feeding mechanism drives the multifunctional plate 2 to separate the storage box 9, then the opening and closing mechanism opens the cover plate 83, and the plastic particles below the multifunctional plate 2 enter into the concave bin 67;

[0064] Step four: when the concave bin 67 moves to the position away from the storage box 9, the inclined feeding mechanism makes the plastic particles in the concave bin 67 pour into the spiral conveying device 5 for height conveying, at the same time, the intermittent feeding mechanism drives the multifunctional plate 2 and the cover plate 83 to return to the initial position again.

[0065] The above only describes certain exemplary embodiments of the present application by way of illustration, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for those skilled in the art. Therefore, the above drawings and descriptions are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A waste polymer plastic recycling device for chemical reuse, comprising a mounting bracket (1), a granulating device (4), a storage box (9) and a screw conveying device (5) arranged on the mounting bracket (1), wherein the storage box (9) is used for temporarily storing plastic particles discharged from the granulating device (4), and is characterized in that: The waste polymer plastic recovery device for chemical reuse further comprises: An annular electric slide rail (6) is provided on a side support (7), and a concave bin (67) is installed on the annular electric slide rail (6) via an intermittent feeding mechanism. When the annular electric slide rail (6) is in an activated state, the intermittent feeding mechanism causes the concave bin (67) to rotate in an annular shape and approach the storage box (9), so that the concave bin (67) extends toward the bottom of the storage box (9) to receive the plastic particles. The multifunctional plate (2) and the opening and closing mechanism are arranged on the mounting bracket (1) by a driving member, and the opening and closing mechanism is further provided with a cover plate (83) rotatably connected to the bottom opening of the storage box (9). When the concave bin (67) moves close to the storage box (9), the driving member is driven by the intermittent feeding mechanism to insert the multifunctional plate (2) into the storage box (9) to form a segmentation. After that, the cover plate (83) is opened by the opening and closing mechanism to enable the concave bin (67) to receive the plastic particles below the segmented multifunctional plate (2); A tilting discharge mechanism is provided between the concave bin (67) and the side support (7), and when the concave bin (67) moves away from the storage box (9), the tilting discharge mechanism tilts the concave bin (67) and pours the received plastic particles into the screw conveying device (5); The intermittent feeding mechanism comprises a sliding seat (61) arranged on an annular electric slide rail (6) and a rack (66) fixed on the sliding seat (61), and the concave bin (67) is movably arranged on the rack (66); The intermittent feeding mechanism also includes a rack 1 (65) and a rack 2 (69) slidably arranged on the sliding seat (61), and a gear 2 (68) rotatably arranged on the sliding seat (61), the gear 2 (68) being arranged between the rack 1 (65) and the rack 2 (69) and simultaneously meshing with the rack 1 (65) and the rack 2 (69), the rack 2 (69) being rotatably connected to the concave bin (67) through the connecting frame (610), the end of the rack 1 (65) being provided with a pressure plate (64), and the pressure plate (64) being connected to the sliding seat (61) through a spring column (62), the mounting bracket (1) being further provided with a traction plate (63), when the sliding seat (61) moves close to the storage box (9), the pressure plate (64) and the traction plate (63) are pressed against each other; The driving member is a circulating belt (3) arranged on the mounting bracket (1), and a gear 1 (31) is installed on the outer surface of the rotating shaft of the circulating belt (3) near the traction plate (63). When the traction plate (63) contacts the pressure plate (64) and moves to the maximum stroke, the gear 1 (31) meshes with the teeth on the surface of the pressure plate (64); The waste polymer plastic recycling device for chemical reuse further comprises a vertical bar (10) fixed to the side stand (7), and when the traction plate (63) contacts the pressure plate (64) and moves to the maximum stroke, the vertical bar (10) is used to limit the pressure plate (64); The multifunctional plate (2) is arranged on the upper surface of the circulating belt (3), and the opening and closing mechanism is arranged on the lower surface of the circulating belt (3). When the gear 1 (31) is engaged with the teeth on the pressure plate (64) and the circulating belt (3) is rotated, the multifunctional plate (2) is inserted into the storage box (9) to form an independent cavity below, and the opening and closing mechanism is separated from the cover plate (83); When the sliding seat (61) moves along the annular electric slide rail (6) to a position away from the storage box (9), the surface of the pressure plate (64) abuts against the vertical bar (10), and the gear 1 (31) meshes with the teeth on the pressure plate (64) again; The traction plate (63) consists of an upper inclined surface portion, a middle flat surface portion, and a lower inclined surface portion.

2. The waste polymer plastic recovery device for chemical reuse according to claim 1, characterized in that: The opening and closing mechanism is slidably mounted on a mounting bracket (1) and is connected to a sliding frame (8) on the lower surface of the circulating belt (3). The sliding frame (8) is provided with a contact roller (81) that contacts the bottom surface of the cover plate (83).

3. The waste polymer plastic recovery device for chemical reuse according to claim 2, characterized in that: A limit plate (82) is also provided on the storage box (9); when the cover plate (83) is opened, the limit plate (82) is used to limit the opening angle of the cover plate (83).

4. The waste polymer plastic recovery device for chemical reuse according to claim 3, characterized in that: The inclined material discharge mechanism includes a material guide plate 1 (122) arranged on a side support (7) and a material guide plate 2 (123) arranged on the top side of the material guide plate 1 (122) by a torsion spring. An extension plate (12) is provided on the concave bin (67) near the side of the spiral conveying device (5). The extension plate (12) is provided with a slot (121) adapted to the material guide plate 1 (122).

5. A method for recovering waste polymer plastics for chemical reuse, applied to the waste polymer plastics recovery device for chemical reuse according to any one of claims 1 to 4, characterized in that: The steps include: Step 1: After pre-treating the waste polymer plastic, the waste polymer plastic is homogenized by the granulation device (4), and the polymer plastic particles after homogenization are temporarily stored in the storage box (9); Step 2: Start the annular electric slide rail (6) to make the intermittent feeding mechanism drive the concave bin (67) to move in an annular motion; Step 3: When the concave bin (67) moves to a position close to the storage box (9), the intermittent feeding mechanism causes the concave bin (67) to extend toward the bottom of the storage box (9). At the same time, the intermittent feeding mechanism causes the multifunctional plate (2) to separate the storage box (9) through the driving member, and then causes the opening and closing mechanism to open the cover plate (83), so that the plastic particles below the multifunctional plate (2) enter the concave bin (67); Step 4: When the concave bin (67) moves to a position away from the storage box (9), the plastic particles in the concave bin (67) are dumped into the spiral conveying device (5) for high-speed conveying through the tilting discharge mechanism, and at the same time, the multi-function plate (2) and the cover plate (83) are restored to their initial positions through the intermittent feeding mechanism through the driving member.

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