Preparation method of polypropylene regenerated plastic particles

Abstract

The invention belongs to the technical field of recycling and processing of plastics, and discloses a preparation method of polypropylene regenerated plastic particles. A crushing box is included, an auxiliary mechanism is arranged on the outer side of the crushing box, and the auxiliary mechanism extends into the crushing box. Due to the fact that the multiple inclined plates are arranged in the waste polypropylene plastic particles, the waste polypropylene plastic particles can be driven to move, after the waste polypropylene plastic particles move to the highest point, the waste polypropylene plastic particles fall between the inclined plates located at the bottom and the rotating ring under the influence of gravity to move and fall next time, meanwhile, the electric heating wire dissipates heat, and therefore the rotating ring is made of copper materials, and the waste polypropylene plastic particles are not prone to falling. The waste polypropylene plastic particles have good heat conductivity, so that the waste polypropylene plastic particles can be dried at 55 DEG C, moisture on the surfaces of the waste polypropylene plastic particles can be rapidly removed, the purpose of conveniently and rapidly putting the waste polypropylene plastic particles into subsequent treatment operation is achieved, and the waste polypropylene plastic particles have considerable commercial value.

Description

Technical Field

[0001] The present application relates to the technical field of plastic recycling and processing, and more specifically, to a method for preparing polypropylene recycled plastic particles. Background Art

[0002] Plastic materials are playing an increasingly important role in human society and production life. The application fields of plastic products have been very wide, and the pollution caused by waste plastics is also very serious, which not only brings increasingly serious environmental pollution problems, but also causes a lot of waste of resources.

[0003] At present, although most waste plastics have not been recycled more effectively, the resource recycling and reuse technology of waste plastics has attracted more and more attention. On the one hand, the recycling of waste plastics can reduce the consumption of petroleum or bio-based raw materials and bring resource conservation benefits. On the other hand, compared with the production of virgin plastics from petroleum, the production of recycled plastics from waste plastics has the environmental benefits of reducing energy consumption and reducing carbon dioxide emissions. Among them, polypropylene plastic is the plastic with the largest domestic production capacity, the largest import volume, and the largest usage, so its recycling volume on the market is also huge.

[0004] In order to solve the above problems, the present application provides a method for preparing polypropylene recycled plastic particles. Summary of the invention

[0005] The present application provides a method for preparing polypropylene recycled plastic particles using the following technical solution:

[0006] A method for preparing polypropylene recycled plastic particles, comprising a crushing box, an auxiliary mechanism is arranged outside the crushing box, the auxiliary mechanism extends into the crushing box, and the auxiliary mechanism comprises a driving component and an adjusting component;

[0007] The auxiliary mechanism includes two guide plates, both of which are fixedly embedded inside the crushing box. The bottom of the crushing box is fixedly connected with a first discharge rack, and the bottom of the first discharge rack is fixedly connected with a hose. A first valve is sleeved outside the hose, and a connecting ring is sleeved outside the bottom end of the hose. One side of the connecting ring is fixedly connected with a connecting cylinder. One end of the hose extends into the connecting cylinder. A rotating ring is embedded inside the connecting cylinder. One end of the rotating ring extends to one side of the connecting cylinder. A plurality of inclined plates are fixedly connected to the inner wall of the rotating ring, and the plurality of inclined plates are evenly distributed around the central line of the rotating ring. A gear ring is fixedly sleeved outside one end of the rotating ring, and a gear meshes with the top of the gear ring. A roller is fixedly embedded inside the gear. The top of the connecting cylinder is fixedly connected with a base, and a first motor is fixedly connected to the top of the base. The output shaft of the first motor is fixedly connected with the roller. A spiral groove is formed outside the connecting cylinder, and an electric heating wire is fixedly embedded inside the spiral groove. A connecting component is arranged outside the electric heating wire.

[0008] Further, the connecting component includes a second discharge rack, which is fixedly embedded inside one end of the rotating ring. Both the first discharge rack and the second discharge rack are in a hopper shape.

[0009] Through the above technical solution, since both the first discharge rack and the second discharge rack are in a hopper shape, the discharging speed of the crushed waste polypropylene plastic can be increased.

[0010] Further, one side of the second discharge rack is fixedly connected with a discharge pipe, a second valve is sleeved outside the discharge pipe, an operating handle is fixedly sleeved outside the connecting cylinder, and a support block is fixedly connected to the bottom of the connecting cylinder.

[0011] Through the above technical solution, by arranging the operating handle, it is convenient for the user to adjust the angle of the connecting cylinder later.

[0012] Further, the connection between the rotating ring and the connecting cylinder is movably connected through a bearing, and the connection between the connecting ring and the hose is movably connected through a bearing.

[0013] Further, the driving component includes two rotating shafts, both of which are movably embedded inside the crushing box. Crushing rollers are fixedly embedded outside both of the rotating shafts, and both of the crushing rollers are located at the bottom of the two guide plates.

[0014] Through the above technical solution, by arranging two crushing rollers, the waste polypropylene plastic can be crushed.

[0015] Further, a first gear disk and a second gear disk are respectively fixedly sleeved outside the rear ends of the two rotating shafts. Both the first gear disk and the second gear disk are located at the rear side of the crushing box. A bottom plate is fixedly connected to the rear side of the crushing box, and a second motor is fixedly connected to the top of the bottom plate. The output shaft of the second motor is fixedly connected to the rear end of one of the rotating shafts.

[0016] Through the above technical solution, by the mutual cooperation between the first gear disk and the second gear disk, the two rotating shafts can drive the two crushing rollers to rotate towards each other.

[0017] Furthermore, the adjusting component includes two screw rods, both of the two screw rods are rotatably connected to the bottom of the crushing box, screw sleeves are screwed on the outer walls of the bottoms of the two screw rods, telescopic rods are arranged on the front sides of the two screw sleeves, the tops of the two telescopic rods are fixedly connected to the bottom of the crushing box, four reinforcing rods are arranged at the bottom of the crushing box, and the four reinforcing rods are respectively fixedly embedded between the two screw sleeves and the two telescopic rods.

[0018] Through the above technical solution, by arranging the four reinforcing rods, the two screw sleeves can be limited, and at the same time, the device can be more stable and firm during use.

[0019] Furthermore, worm wheels are fixedly sleeved on the outer sides of the two screw rods, worm gears are engaged with the rear sides of the two worm wheels, a reinforcing plate is fixedly connected to the rear side of the crushing box, a double-shaft motor is fixedly connected to the bottom of the reinforcing plate, the output shafts of the double-shaft motor are respectively fixedly connected to the two worm gears, and support plates are movably sleeved on the outer sides of the two worm gears, and the two support plates are both fixedly connected to the crushing box.

[0020] Through the above technical solution, by the mutual cooperation between the two worm gears and the two worm wheels, the two screw rods can rotate synchronously, and then the height of the crushing box can be adjusted accordingly.

[0021] Furthermore, movable frames are movably embedded in the front and rear sides of the connecting cylinder, universal wheels are fixedly connected to the bottoms of the two movable frames, and the bottoms of the two universal wheels, the support blocks, the two telescopic rods and the two screw sleeves are all on the same horizontal plane.

[0022] Through the above technical solution, by the mutual cooperation between the two movable frames and the two universal wheels, not only can the connecting cylinder be supported, but also the flexibility of the device can be enhanced.

[0023] Furthermore, it includes the following steps:

[0024] S1: When in use, first open Valve 1 and start Motor 2, and then pour the recycled waste polypropylene plastic after cleaning into the crushing box. Because there are two guide plates, the poured waste polypropylene plastic can be guided to fall between the two crushing rollers. At the same time, the output shaft of Motor 2 drives the rotating shaft on one side to rotate, the rotating shaft on one side drives the first gear disk to rotate, and the first gear disk meshes with the second gear disk to make the rotating shaft on the other side rotate. At this time, the two rotating shafts will drive the two crushing rollers to rotate towards each other. With the rotation of the two crushing rollers, the waste polypropylene plastic will be crushed into particles with a particle size of 5≤mm.

[0025] S2: The waste polypropylene plastic after crushing will fall through a hose into the inside of the rotating ring. When a certain amount of waste polypropylene plastic particles are loaded inside the rotating ring, valve one can be closed, and the electric heating wire and motor one can be started. The output shaft of motor one drives the roller to rotate, the roller drives the gear to rotate, and the gear meshes with the gear ring to make the rotating ring rotate. During the rotation of the rotating ring, multiple inclined plates inside it will follow the rotation and drive the waste polypropylene plastic particles to move. When the waste polypropylene plastic particles move to the highest point, they will fall due to gravity to the space between the inclined plate at the bottom and the rotating ring for the next movement and fall. At the same time, the electric heating wire emits heat. Here, the rotating ring is made of copper material and has good thermal conductivity. Through the above structure, the waste polypropylene plastic particles can be dried at 55°C to remove the moisture on their surfaces;

[0026] S3: When the moisture treatment is completed, the dual-axis motor can be started. The dual-axis motor drives two worm gears to rotate synchronously. The two worm gears cooperate with two worm wheels to make two screws rotate. Since there are four connecting rods, the stability of the crushing box during the rising process can be ensured. During the slow rising of the crushing box, the staff can slowly move the connecting cylinder to the bottom of the crushing box through the operating handle and rotate the connecting cylinder. When the connecting cylinder is in a vertical state, the dual-axis motor can be turned off. Then, the collection container can be placed at the bottom of the discharge pipe and valve two can be opened so that the dried waste polypropylene plastic particles can be discharged through the discharge pipe.

[0027] In summary, the present application includes the following beneficial technical effects:

[0028] In this invention, through the mutual cooperation among motor one, roller, gear, and gear ring, the rotating ring can be rotated. Because there are multiple inclined plates inside it, the waste polypropylene plastic particles can be driven to move. When the waste polypropylene plastic particles move to the highest point, they will fall due to gravity to the space between the inclined plate at the bottom and the rotating ring for the next movement and fall. At the same time, the electric heating wire emits heat. Since the rotating ring here is made of copper material and has good thermal conductivity, the waste polypropylene plastic particles can be dried at 55°C to quickly remove the moisture on their surfaces, achieving the purpose of facilitating quick input into subsequent processing operations and having considerable commercial value. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is the overall structural schematic diagram of the present application;

[0030] Figure 2 is the front view cross-sectional perspective view of the present application;

[0031] Figure 3 is the rear view partial perspective view of the present application;

[0032] Figure 4 For the present application Figure 3 Enlarged view of the structure at position A in

[0033] Figure 5 Perspective sectional view of the connecting cylinder of the present application.

[0034] Description of the reference numerals in the figure:

[0035] 1. Crushing box; 2. Guide plate; 3. First discharge rack; 4. Hose; 5. First valve; 6. Connecting ring; 7. Connecting cylinder; 8. Rotating ring; 9. Inclined plate; 10. Gear ring; 11. Gear; 12. Roller; 13. Base; 14. First motor; 15. Electric heating wire; 16. Second discharge rack; 17. Discharge pipe; 18. Second valve; 19. Operating handle; 20. Support block; 21. Rotating shaft; 22. Crushing roller; 23. First tooth disc; 24. Second tooth disc; 25. Second motor; 26. Screw; 27. Screw sleeve; 28. Telescopic rod; 29. Reinforcing rod; 30. Worm gear; 31. Worm; 32. Biaxial motor; 33. Movable frame; 34. Universal wheel. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0037] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0038] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0039] Embodiment:

[0040] An embodiment of the present application discloses a preparation method of polypropylene recycled plastic particles. Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , including a crushing box 1. An auxiliary mechanism is provided outside the crushing box 1, and the auxiliary mechanism extends into the crushing box 1. The auxiliary mechanism includes a driving component and an adjusting component;

[0041] The auxiliary mechanism includes two guide plates 2. Both of the two guide plates 2 are fixedly embedded in the crushing box 1. A first discharge rack 3 is fixedly connected to the bottom of the crushing box 1. A hose 4 is fixedly connected to the bottom of the first discharge rack 3. A first valve 5 is sleeved outside the hose 4. A connecting ring 6 is sleeved outside the bottom end of the hose 4. A connecting cylinder 7 is fixedly connected to one side of the connecting ring 6. One end of the hose 4 extends into the connecting cylinder 7. A rotating ring 8 is embedded in the connecting cylinder 7. One end of the rotating ring 8 extends to one side of the connecting cylinder 7. A plurality of inclined plates 9 are fixedly connected to the inner wall of the rotating ring 8. The plurality of inclined plates 9 are evenly distributed with the central line of the rotating ring 8 as the axis. A gear ring 10 is fixedly sleeved outside one end of the rotating ring 8. A gear 11 meshes with the top of the gear ring 10. A roller 12 is fixedly embedded in the gear 11. A base 13 is fixedly connected to the top of the connecting cylinder 7. A first motor 14 is fixedly connected to the top of the base 13. The output shaft of the first motor 14 is fixedly connected to the roller 12. A spiral groove is formed on the outside of the connecting cylinder 7, and an electric heating wire 15 is fixedly embedded in the spiral groove;

[0042] Please refer to Figure 1 , Figure 2 and Figure 5 , a connecting component is provided outside the electric heating wire 15. The connecting component includes a second discharge rack 16. The second discharge rack 16 is fixedly embedded in one end of the rotating ring 8. Both the first discharge rack 3 and the second discharge rack 16 are in a hopper shape. A discharge pipe 17 is fixedly connected to one side of the second discharge rack 16. A second valve 18 is sleeved outside the discharge pipe 17. An operating handle 19 is fixedly sleeved on the outside of the connecting cylinder 7. A support block 20 is fixedly connected to the bottom of the connecting cylinder 7. The connection between the rotating ring 8 and the connecting cylinder 7 is movably connected through a bearing. The connection between the connecting ring 6 and the hose 4 is movably connected through a bearing;

[0043] Please refer to Figure 1 , Figure 2 and Figure 3, The driving component includes two rotating shafts 21. Both rotating shafts 21 are movably embedded inside the crushing box 1. On the outer sides of both rotating shafts 21, crushing rollers 22 are fixedly embedded. Both crushing rollers 22 are located at the bottom of the two guide plates 2. On the outer sides of the rear ends of both rotating shafts 21, a first gear disk 23 and a second gear disk 24 are respectively fixedly sleeved. Both the first gear disk 23 and the second gear disk 24 are located at the rear side of the crushing box 1. The rear side of the crushing box 1 is fixedly connected to a bottom plate. On the top of the bottom plate, a second motor 25 is fixedly connected. The output shaft of the second motor 25 is fixedly connected to the rear end of one of the rotating shafts 21;

[0044] Please refer to Figure 1 、 Figure 3 and Figure 4 , The adjusting component includes two screw rods 26. Both screw rods 26 are rotatably connected to the bottom of the crushing box 1. On the outer walls of the bottom ends of both screw rods 26, screw sleeves 27 are screwed. On the front sides of both screw sleeves 27, telescopic rods 28 are provided. The tops of both telescopic rods 28 are fixedly connected to the bottom of the crushing box 1. There are four reinforcing rods 29 at the bottom of the crushing box 1. The four reinforcing rods 29 are respectively fixedly embedded between the two screw sleeves 27 and the two telescopic rods 28;

[0045] Please refer to Figure 1 and Figure 3 , On the outer sides of both screw rods 26, worm gears 30 are fixedly sleeved. On the rear sides of both worm gears 30, worm shafts 31 are engaged. The rear side of the crushing box 1 is fixedly connected to a reinforcing plate. At the bottom of the reinforcing plate, a dual-shaft motor 32 is fixedly connected. The output shafts of the dual-shaft motor 32 are respectively fixedly connected to the two worm shafts 31. On the outer sides of both worm shafts 31, support plates are movably sleeved. Both support plates are fixedly connected to the crushing box 1. Inside the front and rear sides of the connecting cylinder 7, movable frames 33 are movably embedded. At the bottom ends of both movable frames 33, universal wheels 34 are fixedly connected. The bottoms of the two universal wheels 34, the support block 20, the two telescopic rods 28, and the two screw sleeves 27 are all on the same horizontal plane;

[0046] The implementation principle of this embodiment is as follows: When in use, first open the first valve 5 and start the second motor 25. Then pour the recycled waste polypropylene plastic after cleaning into the crushing box 1. Because there are two guide plates 2, it can guide the poured waste polypropylene plastic, making it fall between the two crushing rollers 22. At the same time, the output shaft of the second motor 25 drives one of the rotating shafts 21 to rotate. One rotating shaft 21 drives the first gear disk 23 to rotate. The first gear disk 23 meshes with the second gear disk 24, causing the other rotating shaft 21 to rotate. At this time, the two rotating shafts 21 will drive the two crushing rollers 22 to rotate towards each other. With the rotation of the two crushing rollers 22, the waste polypropylene plastic will be crushed into particles with a particle size ≤ 5 mm;

[0047] The waste polypropylene plastic after being crushed will fall through the hose 4 to the inside of the rotating ring 8. When a certain amount of waste polypropylene plastic particles are loaded inside the rotating ring 8, the first valve 5 can be closed, and the electric heating wire 15 and the first motor 14 can be started. The output shaft of the first motor 14 drives the roller 12 to rotate, the roller 12 drives the gear 11 to rotate, and the gear 11 meshes with the gear ring 10 to make the rotating ring 8 rotate. During the rotation of the rotating ring 8, multiple inclined plates 9 inside it will follow the rotation and drive the waste polypropylene plastic particles to move. When the waste polypropylene plastic particles move to the highest point, they will fall due to gravity to the space between the inclined plate 9 at the bottom and the rotating ring 8 for the next movement and fall. At the same time, the electric heating wire 15 emits heat. Here, the rotating ring 8 is made of copper material and has good thermal conductivity. Through the above structure, the waste polypropylene plastic particles can be dried at 55 °C to remove the moisture on their surfaces;

[0048] After the moisture treatment is completed, the double-shaft motor 32 can be started. The double-shaft motor 32 drives two worm gears 31 to rotate synchronously. The two worm gears 31 cooperate with two worm wheels 30 to make two screw rods 26 rotate. Since there are four reinforcing rods 29, the stability of the crushing box 1 during the rising process can be ensured. During the slow rising of the crushing box 1, the staff can slowly move the connecting cylinder 7 to the bottom of the crushing box 1 through the operating handle 19 and rotate the connecting cylinder 7. When the connecting cylinder 7 is in a vertical state, the double-shaft motor 32 can be turned off. Then, the collection container can be placed at the bottom of the discharge pipe 17 and the second valve 18 can be opened so that the dried waste polypropylene plastic particles can be discharged through the discharge pipe 17. The above operations have the advantages of simple process and less equipment investment, can quickly crush and dry the waste polypropylene plastic, and are convenient for quickly putting it into subsequent processing operations, with considerable commercial value.

[0049] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A device for preparing polypropylene recycled plastic particles, comprising a crushing box (1), characterized in that: An auxiliary mechanism is provided on the outside of the crushing box (1), the auxiliary mechanism extends into the interior of the crushing box (1), and the auxiliary mechanism comprises a driving component and an adjusting component; The auxiliary mechanism comprises two guide plates (2), the two guide plates (2) are fixedly embedded in the crushing box (1), the bottom of the crushing box (1) is fixedly connected to a discharge rack (3), the bottom of the discharge rack (3) is fixedly connected to a hose (4), the outer side of the hose (4) is sleeved with a valve (5), the outer side of the bottom end of the hose (4) is sleeved with a connecting ring (6), one side of the connecting ring (6) is fixedly connected to a connecting tube (7), one end of the hose (4) extends to the inside of the connecting tube (7), a rotating ring (8) is embedded in the inside of the connecting tube (7), one end of the rotating ring (8) extends to one side of the connecting tube (7), and the inner wall of the rotating ring (8) is fixedly connected to There are a plurality of inclined plates (9), and the plurality of inclined plates (9) are evenly distributed with the center line of the rotating ring (8) as the axis. A gear ring (10) is fixedly sleeved on the outer side of one end of the rotating ring (8), a gear (11) is meshed on the top of the gear ring (10), a roller (12) is fixedly embedded inside the gear (11), a base (13) is fixedly connected to the top of the connecting tube (7), a motor (14) is fixedly connected to the top of the base (13), an output shaft of the motor (14) is fixedly connected to the roller (12), a spiral groove is opened on the outer side of the connecting tube (7), an electric heating wire (15) is fixedly embedded inside the spiral groove, and a connecting component is provided on the outer side of the electric heating wire (15).

2. The device for preparing polypropylene recycled plastic particles according to claim 1, characterized in that: The connecting component comprises a second discharging frame (16), wherein the second discharging frame (16) is fixedly embedded inside one end of the rotating ring (8), and the first discharging frame (3) and the second discharging frame (16) are both configured in a bucket shape.

3. The device for preparing polypropylene recycled plastic particles according to claim 2, characterized in that: A discharge pipe (17) is fixedly connected to one side of the discharge rack (16), a valve (18) is sleeved on the outer side of the discharge pipe (17), an operating handle (19) is fixedly sleeved on the outer side of the connecting tube (7), and a support block (20) is fixedly connected to the bottom of the connecting tube (7).

4. The device for preparing polypropylene recycled plastic particles according to claim 1, characterized in that: The connection between the rotating ring (8) and the connecting tube (7) is movably connected via a bearing, and the connection between the connecting ring (6) and the hose (4) is movably connected via a bearing.

5. The device for preparing polypropylene recycled plastic particles according to claim 1, characterized in that: The driving component comprises two rotating shafts (21), the two rotating shafts (21) are movably embedded in the crushing box (1), and crushing rollers (22) are fixedly embedded on the outsides of the two rotating shafts (21), and the two crushing rollers (22) are located at the bottom of the two guide plates (2).

6. The device for preparing polypropylene recycled plastic particles according to claim 5, characterized in that: A toothed disc 1 (23) and a toothed disc 2 (24) are respectively fixedly sleeved on the outer sides of the rear ends of the two rotating shafts (21); the toothed disc 1 (23) and the toothed disc 2 (24) are both located at the rear side of the crushing box (1); a bottom plate is fixedly connected to the rear side of the crushing box (1); a motor 2 (25) is fixedly connected to the top of the bottom plate; an output shaft of the motor 2 (25) is fixedly connected to the rear end of one rotating shaft (21).

7. The device for preparing polypropylene recycled plastic particles according to claim 1, characterized in that: The adjusting component comprises two screw rods (26), the two screw rods (26) are rotatably connected to the bottom of the crushing box (1), the outer walls of the bottom ends of the two screw rods (26) are screwed with screw sleeves (27), the front sides of the two screw sleeves (27) are provided with telescopic rods (28), the tops of the two telescopic rods (28) are fixedly connected to the bottom of the crushing box (1), and the bottom of the crushing box (1) is provided with four reinforcement rods (29), and the four reinforcement rods (29) are respectively fixedly embedded between the two screw sleeves (27) and the two telescopic rods (28).

8. The device for preparing polypropylene recycled plastic particles according to claim 7, characterized in that: The outer sides of the two screw rods (26) are fixedly sleeved with worm wheels (30), the rear sides of the two worm wheels (30) are meshed with worms (31), the rear side of the crushing box (1) is fixedly connected with a reinforcement plate, the bottom of the reinforcement plate is fixedly connected with a double-axis motor (32), the output shafts of the double-axis motor (32) are respectively fixedly connected to the two worms (31), the outer sides of the two worms (31) are movably sleeved with support plates, and the two support plates are fixedly connected to the crushing box (1).

9. The device for preparing polypropylene recycled plastic particles according to claim 1, characterized in that: The front and rear sides of the connecting tube (7) are both movably embedded with movable frames (33), the bottom ends of the two movable frames (33) are both fixedly connected with universal wheels (34), and the bottom ends of the two universal wheels (34), the support block (20), the two telescopic rods (28) and the two screw sleeves (27) are all in the same horizontal plane.

10. A method for preparing polypropylene recycled plastic particles, characterized in that: The following steps are involved: S1: When in use, first open valve 1 (5) and start motor 2 (25), then pour the cleaned recycled waste polypropylene plastic into the crushing box (1). Since two guide plates (2) are provided, the poured waste polypropylene plastic can be guided so that it falls between two crushing rollers (22). At the same time, the output shaft of motor 2 (25) drives the rotating shaft (21) on one side to rotate, and the rotating shaft (21) on one side drives the gear plate 1 (23) to rotate. The gear plate 1 (23) meshes with the gear plate 2 (24), so that the rotating shaft (21) on the other side rotates. At this time, the two rotating shafts (21) will drive the two crushing rollers (22) to rotate in opposite directions. As a result, the two crushing rollers (22) rotate, and the waste polypropylene plastic will be crushed into particles with a particle size of ≤5 mm. S2: The crushed waste polypropylene plastic will fall into the inside of the rotating ring (8) through the hose (4). When a certain amount of waste polypropylene plastic particles are loaded into the rotating ring (8), the valve (5) can be closed, and the electric heating wire (15) and the motor (14) can be started. The output shaft of the motor (14) drives the roller (12) to rotate, and the roller (12) drives the gear (11) to rotate. The gear (11) then meshes with the ring gear (10) to make the rotating ring (8) rotate. The rotating ring (8) is During the rotation, the multiple inclined plates (9) inside the waste polypropylene plastic particles will rotate with it and drive the waste polypropylene plastic particles to move. When the waste polypropylene plastic particles move to the highest point, they will fall between the inclined plate (9) and the rotating ring (8) at the bottom due to gravity, and move and fall again. At the same time, the electric heating wire (15) emits heat. The rotating ring (8) is made of copper material with good thermal conductivity. The above structure can dry the waste polypropylene plastic particles at 55°C to remove moisture from their surface. S3: After the moisture treatment is completed, the double-shaft motor (32) can be started, and the two worms (31) can be driven by the double-shaft motor (32) to rotate synchronously. The two worms (31) cooperate with the two worm wheels (30) to rotate the two screws (26). Since four connecting rods are provided, the stability of the crushing box (1) during the rising process can be guaranteed. During the slow rising of the crushing box (1), the staff can slowly move the connecting tube (7) to the bottom of the crushing box (1) through the operating handle (19) and rotate the connecting tube (7). When the connecting tube (7) is in a vertical state, the double-shaft motor (32) can be turned off, and then the collection container can be placed at the bottom of the discharge pipe (17) and the valve 2 (18) can be opened to allow the dried waste polypropylene plastic particles to be discharged through the discharge pipe (17).

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