Process for preparing degradable plastic master batch by recovering plastic waste

Abstract

The invention relates to the field of plastic waste recovery, in particular to a process for preparing degradable plastic master batch by recovering plastic waste, which comprises the following steps: S1, crushing the recovered plastic waste into fragments; s2, plastic fragments are added between a side plate I and a side plate II in the tube shell through a communicating hole; s3, cleaning liquid is sprayed to the plastic fragments at high pressure through a plurality of water spraying pipes, meanwhile, a center shaft is driven to drive a plurality of stirring plates to conduct stirring and cleaning, and sewage flows out of a water leakage net; s4, after cleaning is completed, a pipe shell is rotated to enable a communicating hole to reach the lower portion, and the plastic fragments are discharged; and S5, drying and crushing the cleaned plastic fragments, mixing the crushed plastic fragments with other raw materials, and carrying out extrusion granulation through an extruder to obtain the degradable plastic master batch. According to the device for preparing the degradable plastic master batch by recycling the plastic waste, the plastic waste can be efficiently and thoroughly cleaned.

Description

Technical Field

[0001] The invention relates to the field of plastic waste recycling, in particular to a process for preparing degradable plastic masterbatch by recycling plastic waste. Background Art

[0002] my country produces a large amount of waste plastics every year. Waste plastics are difficult to degrade in the natural environment, so they cause environmental pollution. my country's main ways to deal with waste plastics are: landfill, incineration, chemical degradation, and recycling. The two recycling methods of landfill and incineration will cause secondary pollution, and the added value of the recycled products is low. Chemical degradation refers to the degradation reaction of polymers under the action of heat and chemical reagents to form low-molecular-weight products. The products can be further utilized, such as monomers can be repolymerized and oil products can be further processed. However, chemical methods require high temperature and high pressure, resulting in high energy consumption and harsh conditions. They have high requirements for equipment materials and are difficult to achieve large-scale operations. Recycling refers to the use of discarded plastic products, which are processed through sorting, cleaning, granulation and other processes to obtain recycled materials. Because this treatment method is environmentally friendly and energy-saving, it is currently the most commonly used treatment method. Moreover, with the advancement of science and technology, it can be prepared into degradable plastics to ensure environmental protection needs.

[0003] Recycling In the cleaning process, the existing methods are mainly divided into two categories. The first method is to evenly lay the plastic fragments on a mesh conveyor belt and use a high-pressure water gun to wash them vigorously. However, this method has an obvious disadvantage: the plastic fragments on the conveyor belt tend to stack together, making it difficult for the high-pressure water gun to fully and thoroughly rinse each piece of plastic, resulting in stains remaining on some fragments. Another method is to put the plastic fragments into a bucket filled with cleaning fluid and use a motor-driven stirring rod to stir and clean the fragments. Although this method can make the plastic fragments fully contact with the cleaning fluid, there is also a problem: since some plastic fragments will float on the water surface, it is difficult to effectively remove stubborn stains attached to the fragments by stirring alone, resulting in poor cleaning effect.

[0004] Although these two methods have their own characteristics, they both have the problem of incomplete cleaning to varying degrees, which affects the reprocessing quality and utilization rate of waste plastic fragments. Therefore, seeking a more efficient and thorough cleaning method has become an urgent problem to be solved in the field of plastic recycling. Summary of the invention

[0005] The purpose of the present invention is to provide a process for preparing degradable plastic masterbatch by recycling plastic waste. By using a device for preparing degradable plastic masterbatch by recycling plastic waste, plastic waste can be cleaned efficiently and thoroughly.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A device for recycling plastic waste to prepare degradable plastic masterbatch, comprising a tube shell with a connecting hole provided on the side of the middle part, side plate frames are rotatably provided at both ends of the tube shell, side plate I and side plate II are provided inside the tube shell, a plurality of water spray pipes are evenly arranged in the circumferential direction on the side of side plate II away from side plate I, a water leakage net is provided at the lower part of side plate I, a frame is fixed at the side of the water leakage net away from side plate II, the frame extends through the side plate frames, central shafts are rotatably provided at the centers of the two side plate frames, the two central shafts respectively penetrate the side plate I and side plate II, and a plurality of stirring plates are fixed to the inner ends of the two central shafts.

[0008] A plurality of water spray pipes are fixed with ring plugs at the ends away from the side plate II, a connecting pipe is passed through the side plate frame close to the side plate II, a ring cavity frame is fixed at the inner end of the connecting pipe, and the ring plug is sealingly connected in the ring cavity frame.

[0009] An extension tube I is provided at the edge of the side panel II in a direction extending away from the side panel I, and an electric telescopic rod I is provided between the extension tube I and the corresponding side panel frame.

[0010] An extension tube II is provided at the edge of the side panel I in a direction extending away from the side panel II, and a gear ring is provided on the extension tube II. An electric telescopic rod II is installed on the other side panel frame, and a clamping block is provided at the free end of the electric telescopic rod II, and the gear ring is limitedly slid in the clamping block.

[0011] A transmission roller is rotated on the side plate frame close to the side plate I, and the transmission roller is meshed and transmission-connected with the gear ring.

[0012] An isolation net is fixed on the side of the side plate I close to the side plate II.

[0013] An outer tube is sleeved on the tube shell, and the outer tube is fixedly connected to two side plate frames. A material storage tube is fixed at the upper end of the outer tube, and a discharge tube is fixed at the lower end of the outer tube.

[0014] The inner end of the central shaft is evenly provided with a support rod shaft, a sleeve is sleeved on the support rod shaft, a washboard is tangentially fixed on the sleeve, and a torsion spring is provided between the sleeve and the support rod shaft to make the sleeve press against the limit block fixed on the support rod shaft.

[0015] The kneading surface of the washboard is provided with a kneading edge.

[0016] The preparation process of the device for preparing degradable plastic masterbatch by recycling plastic waste comprises:

[0017] S1. Crushing the recycled plastic waste into fragments;

[0018] S2, adding plastic fragments into the space between the side plates I and II in the tube shell through the connecting hole;

[0019] S3, high-pressure cleaning liquid is sprayed onto the plastic fragments through multiple water spray pipes, and at the same time, the transmission center shaft drives multiple stirring plates to stir and clean, and the sewage flows out from the leakage net;

[0020] S4. After cleaning is completed, the tube housing is rotated so that the connecting hole is downward to discharge the plastic fragments;

[0021] S5. Dry, crush and mix the cleaned plastic fragments with other raw materials, and then extrude and granulate them through an extruder to obtain biodegradable plastic masterbatch. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 and Figure 2 It is a structural schematic diagram of a device for recycling plastic waste to prepare degradable plastic masterbatch;

[0023] Figure 3 yes Figure 1 A schematic cross-sectional structure diagram of ;

[0024] Figure 4 yes Figure 1 A schematic diagram of the local structure;

[0025] Figure 5 yes Figure 4 A schematic diagram of a partial cross-sectional structure;

[0026] Figure 6 It is a schematic diagram of the structure of the outer tube and the side plate frame;

[0027] Figure 7 is a schematic diagram of the structure of the tube shell;

[0028] Figure 8 It is a schematic diagram of the cross-sectional structure of the extension pipe II, the isolation net and the side plate I;

[0029] Fig. 9 It is a structural schematic diagram of the ring cavity frame;

[0030] Fig.10 It is a schematic diagram of the structure of the side plate II and the extension pipe I;

[0031] Fig.11 It is a structural schematic diagram of a central shaft, a stirring plate, a support shaft, a sleeve and a washboard.

[0032] In the figure:

[0033] Outer tube 101; storage tube 102; discharge tube 103; side plate frame 104;

[0034] Tube housing 201; communicating hole 202;

[0035] Extension pipe II 301; isolation net 302; side plate I 303; water spray pipe 304; ring plug 305; ring cavity frame 306; connecting pipe 307;

[0036] Side plate II 401; extension pipe I 402; water leakage net 403; frame 404; electric telescopic rod I 405;

[0037] Electric telescopic rod II 501; clamping block 502; transmission roller 503;

[0038] Central axis 601; stirring plate 602; support rod axis 603; limit block 604; sleeve 605; washboard 606. DETAILED DESCRIPTION

[0039] like Figure 1-11 As shown, the device for recycling plastic waste to prepare degradable plastic masterbatch is described in detail:

[0040] A device for recycling plastic waste to prepare degradable plastic masterbatch, comprising a tube shell 201 with a connecting hole 202 on the side of the middle part, side plate frames 104 are rotatably provided at both ends of the tube shell 201, side plate I 303 and side plate II 401 are provided inside the tube shell 201, a plurality of water spray pipes 304 are evenly arranged on the side of side plate II 401 away from side plate I 303, a water leakage net 403 is provided at the lower part of the side plate I 303, a frame 404 is fixed on the side of the water leakage net 403 away from side plate II 401, the frame 404 extends through the side plate frame 104, a central shaft 601 is rotatably provided at the center of the two side plate frames 104, the two central shafts 601 respectively penetrate the side plate I 303 and the side plate II 401, and a plurality of stirring plates 602 are fixed to the inner ends of the two central shafts 601.

[0041] When cleaning the plastic fragments, the first motor installed on one of the side plate frames 104 is started to drive the tube housing 201, so that the tube housing 201 rotates on the two side plate frames 104, so that the connecting hole 202 faces upward. At this time, the plastic fragments are added into the tube housing 201 through the connecting hole 202 and enter the cleaning chamber between the side plate I 303 and the side plate II 401. The cleaning liquid is supplied to the multiple water spray pipes 304 through the water supply system, so that the cleaning liquid is sprayed to the plastic fragments at high pressure through the multiple water spray pipes 304. First, the plastic fragments are washed with high pressure. Since the liquid inlet amount of the multiple water spray pipes 304 is greater than the leakage amount at the leakage net 403, as the washing proceeds, the cleaning liquid in the cleaning chamber between the side plate I 303 and the side plate II 401 will gradually increase, so that the plastic fragments are fully contacted with the cleaning liquid, and are immersed and cleaned again, thereby achieving the purpose of efficiently and thoroughly cleaning the plastic fragments;

[0042] At the same time, during cleaning, by starting the two second motors installed on the two side plate frames 104, the two central shafts 601 are driven at the same time, thereby driving the multiple stirring plates 602 to rotate in the cleaning chamber, stirring the plastic fragments, and further improving the efficiency and effect of flushing and soaking the plastic fragments with the cleaning liquid;

[0043] After cleaning is completed, the multiple water spray pipes 304 stop spraying, and the cleaning liquid in the cleaning chamber will gradually flow out through the water leakage net 403 with impurities, and then rotate the first motor transmission tube shell 201 to move the connecting hole 202 downward, thereby discharging the cleaned plastic fragments and completing the cleaning.

[0044] Further:

[0045] A ring plug 305 is fixed to the end of multiple water spray pipes 304 away from the side plate II 401, and a connecting pipe 307 runs through the side plate frame 104 close to the side plate II 401. A ring cavity frame 306 is fixed to the inner end of the connecting pipe 307, and the ring plug 305 is sealed and connected in the ring cavity frame 306.

[0046] By connecting the water supply system with the connecting pipe 307, cleaning liquid is supplied to the annular cavity frame 306, thereby supplying liquid to multiple water spray pipes 304 at the same time, thereby achieving the purpose of supplying liquid to multiple water spray pipes 304 at the same time.

[0047] like Figure 3 , 4, 10 as shown:

[0048] An extension tube I 402 is extended from the edge of the side panel II 401 in a direction away from the side panel I 303 , and an electric telescopic rod I 405 is provided between the extension tube I 402 and the corresponding side panel frame 104 .

[0049] When flushing and soaking cleaning are performed, the electric telescopic rod I405 can be started to reciprocate and retract, which can drive the side plate II401 to move axially back and forth in the tube shell 201, thereby forming an axial reciprocating push on the plastic fragments. When flushing, the plastic fragments can be turned over to improve the flushing effect. When soaking cleaning, the plastic fragments can be stirred in conjunction with the stirring plate 602 to improve the soaking and tilting efficiency.

[0050] Further:

[0051] An extension tube II301 is extended from the edge of the side panel I303 away from the side panel II401, and a gear ring is provided on the extension tube II301. An electric telescopic rod II501 is installed on the other side panel frame 104, and a clamping block 502 is provided at the free end of the electric telescopic rod II501. The gear ring is limited and slides in the clamping block 502.

[0052] By starting the electric telescopic rod II 501 to reciprocate, the extension tube II 301 can be driven to reciprocate axially through the clamping block 502 engaging the toothed ring, and then the side plate I 303 can be moved axially back and forth. When soaking and cleaning, the plastic fragments can be further stirred in cooperation with the stirring plate 602 to improve the soaking and tilting efficiency; since the side plate I 303 can drive the movement of multiple water spray pipes 304 to change the distance of spraying the fragments, and cooperate with the axial reciprocating movement of the side plate II 401 in the tube shell 201, it is easier to turn over the plastic fragments during flushing, thereby improving the flushing effect; moreover, the multiple water spray pipes 304 will drive the ring plug 305 The sealed connection moves back and forth in the annular cavity frame 306. When the multiple water spray pipes 304 are away from the annular cavity frame 306, the space in the annular cavity frame 306 increases, and the water spraying pressure of the multiple water spray pipes 304 decreases. When the multiple water spray pipes 304 are close to the annular cavity frame 306, the space in the annular cavity frame 306 decreases, and the water spraying pressure of the multiple water spray pipes 304 increases, thereby forming a change in the water spraying pressure of the multiple water spray pipes 304, thereby forming a wave-like flushing of the plastic fragments, further improving the flushing efficiency, and during soaking, it is easier to make the cleaning liquid in the cleaning cavity drive the plastic pieces to flow, and then be stirred by the stirring plate 602, further improving the cleaning effect.

[0053] Further:

[0054] A transmission roller 503 is rotated on the side plate frame 104 close to the side plate I 303, and the transmission roller 503 is meshed and transmission-connected with the gear ring.

[0055] By means of the third motor installed on the side plate frame 104 to drive the drive roller 503, the gear ring can be driven to drive the extension tube II 301 and the side plate I 303 to rotate, thereby driving the rotation of multiple water spray pipes 304, thereby forming a circumferentially rotating circulating high-pressure liquid spray for the plastic fragments in the cleaning chamber, further improving the flushing effect. At the same time, during the soaking wash, the cleaning liquid can be better flowed to cooperate with the stirring plate 602 to improve the cleaning effect.

[0056] Further:

[0057] By fixing the isolation net 302 on the side of the side plate I 303 close to the side plate II 401 , it is possible to prevent plastic fragments from entering the water spray pipe 304 and affecting the spraying of liquid.

[0058] like Figure 6 As shown:

[0059] The outer tube 101 is sleeved on the tube shell 201 . The outer tube 101 is fixedly connected to two side frame frames 104 . A storage tube 102 is fixed to the upper end of the outer tube 101 , and a discharge tube 103 is fixed to the lower end of the outer tube 101 .

[0060] The fixed arrangement of the outer tube 101 and the two side frame frames 104 makes the device as a whole more stable, and is supported by the legs at the lower ends of the two side frame frames 104. The storage tube 102 is used to store plastic fragments for the next cleaning. When the connecting hole 202 is rotated to the upper side, the plastic fragments in the storage tube 102 can automatically enter the cleaning chamber. Through the arrangement of the discharge tube 103, the discharged plastic fragments are guided to facilitate centralized collection.

[0061] like Figure 4 , 5, 11 as shown:

[0062] The inner end of the central axis 601 is evenly provided with a support rod shaft 603, a sleeve 605 is sleeved on the support rod shaft 603, a washboard 606 is tangentially fixed on the sleeve 605, and a torsion spring is provided between the sleeve 605 and the support rod shaft 603 to make the sleeve 605 press against the limit block 604 fixed on the support rod shaft 603.

[0063] The kneading surface of the washboard 606 is provided with kneading edges.

[0064] Initially, a torsion spring is provided between the sleeve 605 and the support rod shaft 603, which will make the sleeve 605 rotate on the support rod shaft 603. Since a recessed groove is provided at the end of the sleeve 605, the side of the recessed groove will be affected by the elastic force of the torsion spring to press against the limit block 604. At this time, the washboard 606 is tilted toward the central axis 601 on the other side.

[0065] During the cleaning rotation, the two central axes 601 rotate in opposite directions, so that the rubbing plates 606 on both sides will rotate relatively and contact each other, thereby rubbing the plastic fragments between them, thereby further improving the cleaning effect of the plastic fragments; at the same time, the rubbing effect can be improved by setting the rubbing edges.

[0066] When the two washboards 606 are in contact, the two washboards 606 will squeeze the corresponding torsion springs at the same time, and then rotate on the support rod shaft 603 through the sleeve 605, so that the two washboards 606 fit and slide across each other to complete the scrubbing.

[0067] like Figure 1-11 As shown:

[0068] The preparation process of the device for preparing degradable plastic masterbatch by recycling plastic waste comprises:

[0069] S1. Crushing the recycled plastic waste into fragments;

[0070] S2, adding plastic fragments into the space between the side plate I 303 and the side plate II 401 in the tube housing 201 through the connecting hole 202;

[0071] S3, high-pressure cleaning liquid is sprayed onto the plastic fragments through multiple water spray pipes 304, and at the same time, the transmission center shaft 601 drives multiple stirring plates 602 to stir and clean, and the sewage flows out from the leakage net 403;

[0072] S4, after cleaning is completed, the tube housing 201 is rotated so that the connecting hole 202 is downward to discharge the plastic fragments;

[0073] S5. Dry, crush and mix the cleaned plastic fragments with other raw materials, and then extrude and granulate them through an extruder to obtain biodegradable plastic masterbatch.

Claims

1. A device for recycling plastic waste to prepare degradable plastic masterbatch, characterized in that: The invention comprises a tube shell (201) having a connecting hole (202) arranged on the side of the middle part, side plate frames (104) are rotatably arranged at both ends of the tube shell (201), side plate I (303) and side plate II (401) are arranged inside the tube shell (201), a plurality of water spray pipes (304) are evenly arranged on the side of the side plate II (401) away from the side plate I (303), a water leakage net (403) is arranged at the lower part of the side plate I (303), a frame (404) is fixed on the side of the water leakage net (403) away from the side plate II (401), the frame (404) extends through the side plate frame (104), a central axis (601) is rotatably arranged at the center of the two side plate frames (104), the two central axes (601) respectively penetrate the side plate I (303) and the side plate II (401), and a plurality of stirring plates (602) are fixed on the inner ends of the two central axes (601).

2. The device for recycling plastic waste to prepare degradable plastic masterbatch according to claim 1, characterized in that: A plurality of water spray pipes (304) are fixed with a ring plug (305) at the end away from the side plate II (401), a connecting pipe (307) is passed through the side plate frame (104) close to the side plate II (401), a ring cavity frame (306) is fixed to the inner end of the connecting pipe (307), and the ring plug (305) is sealed and connected in the ring cavity frame (306).

3. The device for recycling plastic waste to prepare degradable plastic masterbatch according to claim 2, characterized in that: An extension tube I (402) is provided at the edge of the side panel II (401) extending away from the side panel I (303), and an electric telescopic rod I (405) is provided between the extension tube I (402) and the corresponding side panel frame (104).

4. The device for recycling plastic waste to prepare degradable plastic masterbatch according to claim 3, characterized in that: An extension tube II (301) is provided at the edge of the side plate I (303) extending away from the side plate II (401), and a gear ring is provided on the extension tube II (301). An electric telescopic rod II (501) is installed on the other side plate frame (104), and a clamping block (502) is provided at the free end of the electric telescopic rod II (501), and the gear ring is limitedly slid in the clamping block (502).

5. The device for recycling plastic waste to prepare degradable plastic masterbatch according to claim 4, characterized in that: A transmission roller (503) is rotatably mounted on the side plate frame (104) close to the side plate I (303), and the transmission roller (503) is meshed and transmission-connected with the gear ring.

6. The device for recycling plastic waste to prepare degradable plastic masterbatch according to claim 5, characterized in that: An isolation net (302) is fixed to the side of the side plate I (303) close to the side plate II (401).

7. The device for recycling plastic waste to prepare degradable plastic masterbatch according to claim 1, characterized in that: An outer tube (101) is sleeved on the tube shell (201), the outer tube (101) is fixedly connected to two side plate frames (104), a material storage tube (102) is fixed at the upper end of the outer tube (101), and a discharge tube (103) is fixed at the lower end of the outer tube (101).

8. The device for recycling plastic waste to prepare degradable plastic masterbatch according to claim 1, characterized in that: The inner end of the central shaft (601) is evenly provided with a support rod shaft (603), a sleeve (605) is sleeved on the support rod shaft (603), a wash plate (606) is tangentially fixed on the sleeve (605), and a torsion spring is provided between the sleeve (605) and the support rod shaft (603) so that the sleeve (605) presses against a limit block (604) fixed on the support rod shaft (603).

9. The device for recycling plastic waste to prepare degradable plastic masterbatch according to claim 8, characterized in that: The kneading surface of the washboard (606) is provided with kneading edges.

10. A process for preparing a degradable plastic masterbatch by recycling plastic waste according to any one of claims 1 to 9, characterized in that: The process includes: S1. Crushing the recycled plastic waste into fragments; S2, adding plastic fragments through the connecting hole (202) between the side plate I (303) and the side plate II (401) in the tube shell (201); S3, high-pressure cleaning liquid is sprayed onto the plastic fragments through multiple water spray pipes (304), and at the same time, the transmission center shaft (601) drives multiple stirring plates (602) to stir and clean, and the sewage flows out from the leakage net (403); S4, after cleaning is completed, the tube housing (201) is rotated so that the connecting hole (202) is downward to discharge the plastic fragments; S5. Dry, crush and mix the cleaned plastic fragments with other raw materials, and then extrude and granulate them through an extruder to obtain biodegradable plastic masterbatch.

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