A PET recycling equipment

Abstract

The present invention relates to the field of PET recycling technology, and is a PET recycling and regeneration equipment. Before removing the labels, the unpacked PET bottles are pressed by a pressing roller. The spacing between the two rollers of the pressing roller is 4mm-5mm, which can stretch the squeezed and deformed PET bottles and subsequently break them into pieces with an average area of ​​8cm 2 ‑10cm 2 When the PET flake material is cleaned, more regular flake materials can be obtained. Due to the large size of PET flake materials, there are fewer bends during one cleaning, the cleaning effect is better, and the screening and drying can be better. When passing through the profiling roller, the bottle cap is squeezed and deformed. Since the material of the bottle cap is generally PP or PE, a large number of cracks occur when it is squeezed to a thickness of 4mm-5mm, and then it can be detached with the label in the label removal device and then screened out. A small amount of PET bottles that cannot be detached are detached during sorting, and the PET bottles are sent to the profiling roller through the material-stripping teeth, which improves the feeding stability and can also puncture the label.

Description

Technical Field

[0001] The present invention relates to the technical field of PET recycling, in particular to PET recycling and regeneration equipment. Background Art

[0002] PET bottles are one of the main components of beverage bottles. Discarded PET bottles cannot degrade spontaneously in the natural environment. Technicians in this field have developed a variety of PET recycling methods, including physical and chemical methods. The physical method refers to the waste PET being subjected to color sorting, PVC sorting, crushing, washing, dehydration and drying to obtain clean PET flakes, which are then re-granulated and provided to fiber plants as raw materials for fiber production. This recycling process uses less equipment and requires less investment. It is the recycling method with the lowest impact on the environment and is also the most environmentally friendly treatment method.

[0003] To facilitate the collection and storage of PET bottles, technicians in this field sort the PET bottles and then compress them into PET bottle bricks. During the recycling process, the PET bottle bricks are unpacked, delabeled, sorted, crushed, cleaned, dried, melted and formed. In order to reduce costs and improve efficiency, technicians in this field hope to reduce recycling costs and increase the value of recycled products.

[0004] Since there are usually residues in PET bottles, cleaning after crushing can effectively remove the residues. Generally, they are crushed into granules with a particle size of 10mm-15mm, which is convenient for compression and melting during the melting process. However, when crushed to 10mm-15mm, the PET granules contain more corners, the cleaning effect becomes poor, and it is difficult to dehydrate, requiring higher dehydration costs. Summary of the Invention

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a PET recycling and regeneration device for performing secondary crushing and cleaning on PET bottles.

[0006] The present invention is achieved through the following technical solutions: a PET recycling and regeneration device, comprising a PET bottle brick pre-processing module, a PET granule processing module, and a regeneration module;

[0007] The PET bottle brick pre-processing module includes an unpacking device, a label removal device, a sorting device, a primary crushing device, a primary cleaning device, and a primary drying device, which are arranged in sequence;

[0008] The PET pellet processing module includes a secondary crushing device, a secondary cleaning device, and a secondary drying device arranged in sequence;

[0009] The regeneration module includes a melt extrusion device and a molding device arranged in sequence;

[0010] The sorting device includes a sorting conveyor belt, and the PET bottles are sorted by color at the sorting conveyor belt;

[0011] The primary crushing device crushes the PET bottle into pieces with an average area of ​​8cm 2 -10cm 2 PET flakes;

[0012] The primary cleaning device includes a stirring cleaning tank;

[0013] The primary drying device dries the PET flakes to a moisture content of less than 5%;

[0014] The secondary crushing device crushes the PET flakes into particles with a diameter of 10 mm to 15 mm to obtain PET pellets;

[0015] The secondary cleaning device includes a cleaning cylinder for removing impurities;

[0016] The secondary drying device dries the PET pellets to a moisture content of less than 1%;

[0017] The melt extrusion device includes a melt screw extruder;

[0018] The forming device includes a forming die;

[0019] A label removal pretreatment device is arranged between the unpacking device and the label removal device. The label removal pretreatment device includes a conveyor belt 1 arranged between the unpacking device and the label removal device. A pair of press rollers is arranged between the conveyor belt 1 and the label removal device. The spacing between the two rollers of the press rollers is 4mm-5mm. Both rollers of the press rollers are provided with material stripping teeth. The label removal device includes a label removal machine.

[0020] Furthermore, the stirring cleaning tank includes a cleaning pool, and a swing-type cleaning machine is provided in the cleaning pool.

[0021] Furthermore, the primary drying device includes a drainage conveyor belt and a bouncing screen arranged in sequence.

[0022] Furthermore, the secondary cleaning device includes an inclined impurity removal cleaning cylinder, the impurity removal cleaning cylinder is connected to a water inlet pipe and a water outlet pipe, and the impurity removal cleaning cylinder is also connected to a dosing device. The PET pellets enter from the lower end of the impurity removal cleaning cylinder and are discharged from the upper end of the impurity removal cleaning cylinder. The upper end of the impurity removal cleaning cylinder is provided with a draining device for draining the PET pellets.

[0023] The secondary drying device includes a drying cylinder, which is connected to an exhaust pipe. The moisture content of the PET pellets passing through the drying cylinder is less than 1%.

[0024] Furthermore, an upward pushing device is provided in the impurity removal and cleaning cylinder, and the pushing device includes a spiral blade provided at the lower end of the impurity removal and cleaning cylinder, and the length of the spiral blade is 1 / 2 of the length of the impurity removal and cleaning cylinder.

[0025] Furthermore, the spiral blade includes a main shaft, an extrusion blade is installed on the upper end of the main shaft, the main shaft is connected to the drive motor, and the extrusion blade is made of a perforated plate.

[0026] Furthermore, the pitch value of the push flow blades is greater than the pitch value of the extrusion blades, and the push flow blades are made of orifice plates.

[0027] Furthermore, the dosing device includes an alkali liquid tank and an acid liquid tank, and the alkali liquid tank and the acid liquid tank are respectively connected to the lower end of the impurity removal and cleaning cylinder through pipelines with valves.

[0028] The beneficial effects of the present invention are:

[0029] 1. Before removing the labels, the unpacked PET bottles are pressed by a pressing roller. The distance between the two rollers of the pressing roller is 4mm-5mm, which can stretch the squeezed and deformed PET bottles and then break them into an average area of ​​8cm in the subsequent crushing. 2 -10cm 2 When processing PET flakes, more regular flakes can be obtained. Due to the large size of PET flakes, there are fewer bends during one cleaning, the cleaning effect is better, and the screening and drying can be better performed. When passing through the pressing rollers, the bottle caps are squeezed and deformed. Since the material of the bottle caps is generally PP or PE, a large number of cracks will occur when they are squeezed to a thickness of 4mm-5mm. Then, they can be separated along with the labels in the label removal device and then screened out. A small number of PET bottles that cannot be removed are separated during sorting and fed into the pressing rollers by the material-dividing teeth, which improves the feeding stability and can also puncture the labels.

[0030] 2. Use the swing type cleaning machine to clean the average area of ​​8cm in the cleaning pool. 2 -10cm 2 The PET flakes are cleaned and turned over to remove residual liquid, dust and other attached impurities. The PET flakes are then drained through a drain conveyor belt and then dehydrated through a bouncing screen to dry the PET flakes to a moisture content of less than 5%. A water film is attached to the surface of the dried PET flakes with few water droplets. Further dehydration is costly and requires secondary cleaning to control the moisture content to less than 5%. Tests have found that when a water film is attached to the surface of the PET flakes, a water film can be formed on the surface of the cutter disc during the crushing process to a particle size of 10mm-15mm, reducing the amount of PET melt adhering to the cutter disc.

[0031] 3. The crushed PET pellets are cleaned by an inclined impurity removal and cleaning cylinder. Since the density of PET is relatively low, usually 1.38-1.40g / cm³, and its shape is irregular, it is filled and risen in the impurity removal and cleaning cylinder. The gaps between them are guaranteed, and the upward driving force required is relatively small. The impurity removal and cleaning cylinder is also connected to a dosing device. An air distribution pipe is installed at the lower end of the impurity removal and cleaning cylinder. The air distribution pipe is connected to a high-temperature air source to heat the cleaning water and generate air flow disturbance, thereby improving the cleaning effect and energy utilization. An upward-slanting pushing spiral blade is installed in the impurity removal and cleaning cylinder. The length of the spiral blade is 1 / 2 of the length of the impurity removal and cleaning cylinder. A drainage device is provided at the upper end of the impurity removal and cleaning cylinder to drain the PET pellets. The PET pellets are heated, air flow disturbed, water flow disturbed, and spiral blade disturbed at the lower end of the impurity removal and cleaning cylinder, which has a good cleaning effect. After cleaning, they are enriched and squeezed to drain at the upper end of the impurity removal and cleaning cylinder, and the time is relatively long, which has a good initial water removal effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the connection relationship between various devices of the present invention;

[0033] Figure 2 It is a schematic diagram of the connection between the profiled rollers and the conveyor belt;

[0034] Figure 3 It is a structural diagram of a swing type cleaning machine;

[0035] Figure 4 This is a schematic diagram of the connection between the impurity removal cleaning cylinder and the melting screw extruder;

[0036] Figure 5 It is a cross-sectional diagram of the impurity removal cleaning cylinder and the melting screw extruder;

[0037] Figure 6 This is a cross-sectional schematic diagram of the impurity removal and cleaning cylinder of Example 2;

[0038] Figure 7 Schematic diagram of the overflow grid structure of Example 2.

[0039] Among them: 1. Conveyor belt 1; 2. Docking slide; 3. Profiled rollers; 301. Divider gear; 4. Swing cleaning basket; 5. Support shaft; 6. Crusher 2; 7. Debris cleaning cylinder; 701. Drain pipe; 702. Main shaft; 703. Push flow blade; 704. Extrusion blade; 705. Water inlet pipe; 706. Filter plate; 707. One-way valve; 708. Turbine rod; 709. Overflow grid; 8. Alkali liquid tank; 9. Acid liquid tank; 10. Pressure relief port; 11. Reflux trough; 12. Air distribution pipe; 13. Booster pump; 14. Melting screw extruder; 1401. Variable diameter screw; 1402. Heating hood; 15. Spinning box; 16. Cooling box; 17. Pipeline 1; 18. Pipeline 2; 19. Vacuum pump; 20. Isolation valve; 21. Throttle valve; 22. Drying cylinder; 23. Dropping pipe. DETAILED DESCRIPTION

[0040] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] Example 1

[0043] like Figure 1-5 As shown, a PET recycling and regeneration equipment includes a PET bottle brick pretreatment module, a PET particle material processing module, and a regeneration module.

[0044] The PET bottle brick pre-processing module includes an unpacking device, a label removal device, a sorting device, a primary crushing device, a primary cleaning device, and a primary drying device which are distributed in sequence.

[0045] The unpacking device uses the bottle brick unpacking machine of Henan Genghui Machinery Equipment Co., Ltd. to disassemble and disperse the bottle bricks.

[0046] The label removal device uses the beverage bottle label removal machine of Henan Youbao Machinery Equipment Co., Ltd., which removes the label through the action of the label removal roller.

[0047] A label removal pretreatment device is arranged between the unpacking device and the label removal device. The label removal pretreatment device includes a conveyor belt 1 installed between the unpacking device and the label removal device. The conveyor belt 1 is a magnetic separation conveyor belt, which can separate iron blocks. A pressing roller 3 is installed between the conveyor belt 1 and the label removal device. The discharge end of the conveyor belt 1 guides the PET bottle to the pressing roller 3 through the docking slide 2. The spacing between the two rollers of the pressing roller 3 is 4mm-5mm. Both rollers of the pressing roller 3 are equipped with a material-dividing tooth 301. In this embodiment, the material-dividing tooth 301 is a conical tooth and is distributed in rows and columns on the rollers of the pressing roller 3. The pressing roller 3 is connected to a drive motor. Before label removal, the unpacked PET bottles are pressed by the pressing roller 3. The spacing between the two rollers of the pressing roller 3 is 4mm-5mm, which can stretch the squeezed and deformed PET bottles and then crush them into an average area of ​​8cm in the subsequent crushing. 2 -10cm 2 When the PET flake material is processed, more regular flake materials can be obtained. When passing through the pressing roller 3, the bottle cap is squeezed and deformed. Since the material of the bottle cap is generally PP or PE, a large number of cracks occur when it is squeezed to a thickness of 4mm-5mm, and then it can be separated along with the label in the label removal device and then screened out. A small amount of PET bottles that cannot be removed are separated during sorting and fed into the pressing roller 3 through the material stripping teeth 301, which improves the feeding stability and can also puncture the label.

[0048] The sorting device includes a sorting conveyor belt, and the PET bottles are manually sorted by color on the sorting conveyor belt. In this embodiment, colored PET bottles and colorless PET bottles with bottle caps are rejected.

[0049] The primary crushing device includes a crusher. The crusher uses a cutter disc crusher. By controlling the distance between the cutter discs, the PET bottles are crushed into an average area of ​​8cm 2 -10cm 2 PET flakes, due to the large size of PET flakes, have fewer bends during one cleaning, have better cleaning effects, and can be better screened and dried.

[0050] The primary cleaning device includes a stirring cleaning tank. Specifically, the stirring cleaning tank includes a cleaning pool. A swing-type cleaning machine is installed in the cleaning pool. The swing-type cleaning machine includes a swing cleaning basket 4. The swing cleaning basket 4 is connected to a swing driving device through a horizontal support shaft 5. The swing driving device can be a forward and reverse motor, or a motor-driven rocker, thereby realizing the reciprocating cleaning of the swing cleaning basket 4. Since the density of PET is relatively small, usually 1.38-1.40g / cm³, the average area of ​​PET in the cleaning pool is 8cm3 by the swing cleaning machine. 2 -10cm 2The PET flakes are cleaned, dispersed, and turned over, and then the residual liquid, dust and other attached impurities are removed. After the cleaning is completed, the PET flakes are taken out from the swing cleaning basket 4 through a net bag or a mechanical gripper.

[0051] The primary drying device dries the PET flakes to a moisture content of less than 5%. Specifically, the primary drying device includes a drainage conveyor belt and a bouncing screen installed in sequence. After drying, a water film is attached to the surface of the PET flakes, with few water droplets. Further dehydration is costly and requires secondary cleaning, so the moisture content can be controlled below 5%. Tests have found that when a water film is attached to the surface of the PET flakes, a water film can be formed on the surface of the cutter disc during the process of crushing to a particle size of 10mm-15mm, reducing the amount of PET melt adhering to the cutter disc. During the test, the moisture content of the PET flakes was controlled by controlling the length of the drainage conveyor belt and the power of the bouncing screen. The test results are shown in Table 1.

[0052] Table 1

[0053]

[0054] In Appendix 1, the PET flake pile refers to the PET flake pile observed after primary drying. The PET flake piles with a moisture content of 5% and 8% are directly obtained by the primary drying device provided in this embodiment, and the PET flake pile with a moisture content of 3% is obtained by being processed by the primary drying device, spread on the stockpile, and further dried.

[0055] The PET pellet processing module includes a secondary crushing device, a secondary cleaning device, and a secondary drying device which are distributed in sequence.

[0056] Specifically, the secondary crushing device includes a crusher 2 6, which uses a cutter disc crusher. By controlling the distance between the cutter discs, the PET flakes are crushed to a particle size of 10mm-15mm to obtain PET granules.

[0057] The secondary cleaning device includes an inclined impurity removal cleaning cylinder 7, which is connected to the discharge port of the crusher 2 6 by a connecting pipe. The cleaning water level in the impurity removal cleaning cylinder 7 can extend into the connecting pipe. The impurity removal cleaning cylinder 7 is connected with an inlet pipe 705 and an outlet pipe. In this embodiment, the inclination angle of the impurity removal cleaning cylinder 7 is 5°. The PET pellets enter from the lower end of the impurity removal cleaning cylinder 7 and are discharged from the upper end of the impurity removal cleaning cylinder 7. The inlet pipe 705 is installed close to the upper end of the impurity removal cleaning cylinder 7, and the drain pipe 701 is installed at the lower end of the impurity removal cleaning cylinder 7, so that the moving direction of the PET pellets is opposite to the direction of the water flow, forming a flushing Washing, the impurity removal cleaning cylinder 7 is also connected to a dosing device, which includes an alkali liquid tank 8 and an acid liquid tank 9. The alkali liquid tank 8 and the acid liquid tank 9 are respectively connected to the lower end of the impurity removal cleaning cylinder 7 through a pipe with a valve. According to the material of the original material of the discarded colorless polyester bottle, the corresponding acid or alkali liquid is configured to improve the cleaning effect. An upward pushing device is installed in the impurity removal cleaning cylinder 7. The pushing device includes a spiral blade installed at the lower end of the impurity removal cleaning cylinder 7. The length of the spiral blade is 1 / 2 of the length of the impurity removal cleaning cylinder 7. Specifically, the spiral blade includes a main shaft 702, a large-pitch pushing device installed at the lower end of the main shaft 702. The flow blade 703 and the small-pitch extrusion blade 704 at the upper end are connected to the main shaft 702 and the drive motor. The flow-pushing blade 703 and the extrusion blade 704 are made of orifice plates, so that there is a greater interaction force between the spiral blade and the PET pellets, that is, the water flows through the holes of the orifice plate, pushing the PET pellets and the spiral blades to squeeze each other. The spiral pitch value of the flow-pushing blade 703 is 1.5-2 times the spiral pitch value of the extrusion blade. At the flow-pushing blade 703, the PET pellets can fully contact with the cleaning water, and the PET pellets can move freely, thereby improving the cleaning effect. At 04, the PET pellets are enriched and squeezed, and pushed upward to the area without spiral blades. A draining device for draining the PET pellets is installed at the upper end of the impurity removal and cleaning cylinder 7. The draining device includes a long strip drain port processed at the upper end of the impurity removal and cleaning cylinder 7. A filter plate 706 is installed at the drain port, and a reflux groove 11 is installed on the outside of the drain port. The cleaned PET pellets are pushed upward by the extrusion blades 704 and drained through the drain port to reduce the water content, and then continue to be discharged upward through the discharge port. The cleaning water level is close to the lower end of the drain port, and the water in the reflux groove 11 flows downward back into the impurity removal and cleaning cylinder 7.

[0058] The secondary drying device includes a drying cylinder 22. The feed port of the drying cylinder 22 and the discharge port of the impurity removal and cleaning cylinder 7 are sealed together by a drop pipe 23. The drying cylinder 22 is connected to an exhaust pipe. The temperature and length of the drop drying cylinder 22 are controlled to make the moisture content of the PET granules passing through the drying cylinder 22 less than 1%, thereby meeting the melting requirement.

[0059] The melt extrusion device includes a melt screw extruder 14, specifically a variable diameter melt screw extruder 14, the diameter of which gradually decreases from the feed end to the discharge end, thereby increasing the pressure at the discharge end to ensure the stability of the spinneret. The variable diameter melt screw extruder 14 includes a variable diameter screw 1401 and a heating cover 1402 installed outside the variable diameter screw 1401. The heating cover 1402 extends to the drying cylinder 22. In this embodiment, the feed section of the melt screw extruder 14 forms the drying cylinder 22, and the length of the drying cylinder 22 is 1 / 4" (1 / 4). The length value is 1 / 4 of the total length value of the melting screw extruder 14. The exhaust pipe is connected to the feed end of the drying cylinder 22. The screws at the drying cylinder 22 are equally spaced screws. Since a large amount of water vapor is generated at the drying cylinder 22, a throttle valve 21 is installed on the exhaust pipe. The exhaust pipe is connected to a booster pump 13. The booster pump 13 is a pipeline pump. The inlet end of the booster pump 13 is connected to the exhaust pipe, which can quickly discharge the water vapor at the drying cylinder 22 and prevent the water vapor from condensing into water droplets. It can also stabilize the drying cylinder 2 2, reduce heat loss, because the exhaust pipe and the blanking pipe 23 are close, the air flow from the blanking pipe 23 to the drying cylinder 22 will affect the discharge effect of water vapor, and an isolation valve 20 is installed on the blanking pipe 23. The isolation valve 20 is a plate valve. The isolation valve 20 is opened and closed periodically to ensure sufficient blanking into the drying cylinder 22. Specifically, when the isolation valve 20 is closed, the air flows from the drying cylinder 22 and the feed end of the variable diameter screw to the booster pump 13, ensuring the drying effect and reducing the melting screw extruder. 14. At this time, the PET pellets are enriched above the isolation valve 20. When the isolation valve 20 is opened, the enriched PET pellets fall down. Since the PET pellets are enriched, they fall down quickly and form a sealed isolation. Based on this situation, the ratio of the opening time and the closing time of the isolation valve 20 is 1 / 3-1 / 2. The total amount of material falling does not decrease, so as to ensure the stable feeding of the melting screw extruder 14. A vacuum pump 19 is installed at the end of the melting screw extruder 14 to ensure the discharge of air.

[0060] The forming device includes a forming box, which is then regenerated to obtain strip, filament, sheet, or film-shaped products. In this embodiment, the forming box is a spinneret 15 for forming polyester fibers. The spinneret 15 is sealed to the discharge port of the melting screw extruder 14. A spinneret is installed in the spinneret 15. The molten polyester passes through the spinneret to form polyester fibers.

[0061] The cooling device includes a cooling box 16, which is connected to a cooling air inlet and a cooling air outlet. The cooling air inlet is connected to an air source. The cooled polyester fibers are bundled, curled, heat-set, and cut to obtain imitation down filling material, which in this embodiment is imitation duck down filling material.

[0062] In this embodiment, an air distribution pipe 12 is installed at the lower end of the impurity removal and cleaning cylinder 7. The air distribution pipe 12 is connected to the cooling air outlet and the exhaust pipe through a pipe. Specifically, the cooling air outlet is connected to the air distribution pipe 12 through a pipe 2 18, providing a main airflow with a large airflow and a low temperature. The exhaust pipe is connected to the air distribution pipe 12 through a pipe 17, providing a high-temperature airflow with a small airflow and a high pressure. The air distribution pipe 12 is connected to a one-way valve 707 pointing to the impurity removal and cleaning cylinder 7, thereby preventing water from flowing back into the air distribution pipe 12 and the hot air discharged from the cooling air outlet and the exhaust pipe. , an air flow is formed through the air distribution pipe 12, which disturbs the PET granules in the impurity removal and cleaning cylinder 7, and heats the cleaning water flow and the PET granules, thereby improving the cleaning effect and improving energy utilization. In addition, the air flow containing polymers discharged from the melting screw extruder 14 is filtered through the impurity removal and cleaning cylinder 7 and can be discharged directly. A pressure relief port 10 is installed at the upper end of the impurity removal and cleaning cylinder 7, which is then connected to an emptying pipe to discharge the exhaust gas. When the air flow passes through the PET granules enriched at the upper end of the impurity removal and cleaning cylinder 7, it can also accelerate the drainage.

[0063] Example 2

[0064] like Figure 6-7As shown, the PET granule processing module and the regeneration module can be used in combination to obtain a polyester spinning recycling and regeneration equipment. The difference from Example 1 is that the inclination angle of the impurity removal and cleaning cylinder 7 is 30°-35°. During the test of the PET recycling and regeneration equipment obtained in Example 1, it was found that when the air flow direction is opposite to the water flow direction, the recycling effect is better for the sorted discarded colorless polyester bottles. However, for the sorted polyester spinning, it is mainly discarded polyester fabrics or polyester fillers, which contain less impurities and more fine fibers obtained by crushing. The pushing effect at the pushing blade 703 is poor, and it will be enriched first and then pushed upward. In this embodiment, the pushing blade 703 is replaced by a spoiler rod 708, and the water inlet pipe 705 is installed at the lower end of the impurity removal and cleaning cylinder 7. The air distribution pipe 12 is connected to the water inlet pipe 705, so that the incoming water forms turbulent flow and contains a large number of bubbles. An overflow grid 709 is installed on the inner wall of the impurity removal and cleaning cylinder 7 between the blades 704. The area of ​​the overflow grid 709 is 1 / 2-2 / 3 of the cross-sectional area of ​​the impurity removal and cleaning cylinder 7. Since the discarded polyester fabric or polyester filler has a smaller bulk density and there are more fine fibers obtained by crushing, it is more susceptible to disturbance by the water flow and will float upward under the drive of the air flow. The spoiler rod 708 is selected to have a stirring and disturbing effect to ensure the cleaning effect of the PET particles. After the PET particles float upward and pass over the overflow grid 709, the overflow grid 709 blocks them and they do not move downward, but are enriched on the upper side of the overflow grid 709, and then the extrusion blades 704 push upward. In this embodiment, the drain pipe 701 is installed near the upper side of the overflow grid 709, and a filter cover is installed at the inlet end of the drain pipe 701 to avoid blockage. The drainage water flow improves the enrichment effect of the PET particles on the upper side of the overflow grid 709.

[0065] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A PET recycling and regeneration equipment, characterized in that: Including PET bottle brick pretreatment module, PET granule processing module and regeneration module; The PET bottle brick pretreatment module includes an unpacking device, a label removal device, a sorting device, a primary crushing device, a primary cleaning device, and a primary drying device which are arranged in sequence; The PET pellet processing module includes a secondary crushing device, a secondary cleaning device, and a secondary drying device which are arranged in sequence; The regeneration module comprises a melt extrusion device and a molding device which are arranged in sequence; The sorting device comprises a sorting conveyor belt, and the PET bottles are sorted by color at the sorting conveyor belt; The primary crushing device crushes the PET bottle into pieces with an average area of ​​8cm 2 -10cm 2 PET flakes; The primary cleaning device comprises a stirring cleaning tank; The primary drying device dries the PET flake material to a moisture content of less than 5%; The secondary crushing device crushes the PET flakes into particles with a diameter of 10 mm to 15 mm to obtain PET granules; The secondary cleaning device comprises a cleaning cylinder for removing impurities; The secondary drying device dries the PET pellets to a moisture content of less than 1%; The melt extrusion device comprises a melt screw extruder; The forming device comprises a forming die; A label removal pretreatment device is arranged between the unpacking device and the label removal device, and the label removal pretreatment device includes a conveyor belt 1 arranged between the unpacking device and the label removal device. A pair of press rollers is arranged between the conveyor belt 1 and the label removal device. The spacing between the two rollers of the pair of press rollers is 4mm-5mm. Both rollers of the pair of press rollers are provided with material stripping teeth. The label removal device includes a label removal machine.

2. A PET recycling and regeneration equipment according to claim 1, characterized in that: The stirring cleaning tank comprises a cleaning pool, and a swing-type cleaning machine is arranged in the cleaning pool.

3. A PET recycling and regeneration equipment according to claim 1, characterized in that: The primary drying device comprises a drainage conveyor belt and a bouncing screen which are arranged in sequence.

4. A PET recycling and regeneration equipment according to claim 1, characterized in that: The secondary cleaning device comprises an inclined impurity removal cleaning cylinder, the impurity removal cleaning cylinder is connected to a water inlet pipe and a water outlet pipe, the impurity removal cleaning cylinder is also connected to a dosing device, the PET pellets enter from the lower end of the impurity removal cleaning cylinder and are discharged from the upper end of the impurity removal cleaning cylinder, and a drain device for draining the PET pellets is provided at the upper end of the impurity removal cleaning cylinder; The secondary drying device comprises a drying cylinder, the drying cylinder is connected with an exhaust pipe, and the moisture content of the PET granules passing through the drying cylinder is less than 1%.

5. A PET recycling and regeneration equipment according to claim 4, characterized in that: An upward pushing device is arranged in the impurity removal and cleaning cylinder. The pushing device comprises a spiral blade arranged at the lower end of the impurity removal and cleaning cylinder. The length of the spiral blade is 1 / 2 of the length of the impurity removal and cleaning cylinder.

6. A PET recycling and regeneration equipment according to claim 5, characterized in that: The spiral blade comprises a main shaft, an extrusion blade is installed on the upper end of the main shaft, the main shaft is connected to a driving motor, and the extrusion blade is made of a perforated plate.

7. A PET recycling and regeneration equipment according to claim 6, characterized in that: A push flow blade is arranged on the main shaft at the lower side of the extrusion blade, the spacing value of the push flow blade is greater than the spacing value of the extrusion blade, and the push flow blade is made of a perforated plate.

8. A PET recycling and regeneration equipment according to claim 4, characterized in that: The dosing device comprises an alkali liquid tank and an acid liquid tank, and the alkali liquid tank and the acid liquid tank are respectively connected with the lower end of the impurity removal and cleaning cylinder through pipelines with valves.

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