CN112549355A

CN112549355A - Production device and process for recycling and reusing high-quality bottle flakes

Info

Publication number: CN112549355A
Application number: CN202011301452.5A
Authority: CN
Inventors: 孙伟光; 王占军; 张全生; 刘双营
Original assignee: Zhengzhou Zhongyuan Drying Engineering Co ltd
Current assignee: Zhengzhou Zhongyuan Drying Engineering Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-03-26

Abstract

The invention relates to the technical field of bottle piece recycling, granulation and recycling, in particular to a production device and a process for recycling, granulation and recycling of high-quality bottle pieces, wherein the production device takes 3A-grade bottle pieces as raw materials and is sequentially provided with a bottle piece feeding device, an impurity removing and drying device, a screw extrusion and granulation device and a multi-bin mixing device, the screw extrusion and granulation device is respectively communicated with the multi-bin mixing device through material pipelines, and the process mainly comprises the steps of screening and sorting the bottle pieces to remove impurities, and then preheating, heating, drying and melting granulation are carried out; finally, the cut particles are uniformly mixed and then output, the device and the process have the characteristic of high refinement degree, and the defects of high cost, low quality and low yield of the existing production system are overcome, the bottle piece recycling and granulating process greatly improves the batch yield, and is convenient for downstream use; the granulated particles produced by the device and the process can be used for producing downstream high-end products and even can be made into food-grade products.

Description

Production device and process for recycling and reusing high-quality bottle flakes

Technical Field

The invention relates to the technical field of bottle flake recycling, granulation and recycling, in particular to a production device and a production process for recycling, granulation and recycling of high-quality bottle flakes.

Background

The existing bottle flake recycling and granulating process is different from manufacturers, and existing process equipment is used for directly feeding recycled bottle flakes into a screw extruder for melt granulation to form granules after primary selection, crushing, cleaning, drying or spin-drying treatment, wherein in the technology, the bottle flakes directly fed into the screw extruder are generally 3A standard bottle flakes (namely bottle flakes formed by primarily selecting, crushing, cleaning and drying PET (polyethylene terephthalate) bottles recycled from cities and towns, and are also called 3A-grade bottle flakes), the polyvinyl chloride content in the bottle flakes is about 90-100 mg/Kg, the polyolefin content is about 180-200 mg/Kg, the water content is about 1%, the powder content is about 1900-2000 mg/Kg, and the content of other impurities (silt and metal) is about 280-300 mg/Kg. The bottle chips still have high residues, which affect the performance indexes of downstream granulation and products in various stages, and the process equipment has low requirements on the quality of granulation, and most of products produced by the process can only be used for manufacturing low-end products.

In addition, the batch yield of the existing bottle piece recycling and granulating process is not large, generally, each batch is different from several tons to 40 tons, and because the recycled bottle pieces are used as raw materials, the quality of the raw materials is uneven, the production of small batches can cause the problems of unstable product quality, uneven molecular chain length and the like of products produced at different time intervals, stable quality and stable batch materials can not be provided for downstream, and great inconvenience is caused to stable use of downstream customers;

on the whole, the prior process equipment mainly has the following problems that firstly, the performance indexes of the obtained bottle flakes and the obtained granules are low, and the quality of the obtained product is not high; secondly, the weight of the obtained grain is different in different batches, and large-batch stable supply is not available; and thirdly, because the recycled bottle chips are used as raw materials, the quality of the raw materials is uneven, various parameters of the obtained granules in different batches are different, and due to the difference, the performance indexes of the product produced in the downstream are unstable, discontinuous and inconsistent, and even do not reach the standard. For example, when the dyeing agent is supplied to a downstream production filament, the phenomena of broken filaments and broken filaments occur, and when the dyeing agent is used for dyeing, the dyeing is difficult, the dyeing is not uniform, and the like.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provide a production device and a production process for recycling, granulating and reusing high-quality bottle flakes, so that the quality of a recycled bottle flake granulated product and the stability and continuity of product performance indexes are improved, and the recycling, granulating and reusing production environment is improved.

The technical scheme of the invention is as follows:

on one hand, the invention provides a production device for recycling and reusing high-quality bottle flakes, which comprises a bottle flake feeding device and a screw extrusion and granulation device, wherein 3A-level bottle flakes are used as raw materials in the production device, an impurity removal drying device is arranged between the bottle flake feeding device and the screw extrusion and granulation device, the impurity removal drying device comprises a vortex current separator, a material sorting machine, a fluidized bed, a circular vibrating screen and a drying reaction tower which are sequentially arranged, and a multi-bin mixing device is arranged at the output end of the screw extrusion and granulation device.

The fluidized bed preheats the bottle pieces, removes water on the surfaces of the bottle pieces, and dries silt attached to the surfaces of the bottle pieces, so that the circular vibrating screen can easily screen out residual trace silt. The drying reaction tower further dries the bottle piece, thoroughly gets rid of the inside and surperficial moisture of bottle piece, avoids cutting grain inside or the surface bubble even fracture appearing in the grain process of cutting grain in the casting band to guarantee the quality of cutting grain and the even of weight.

Further, the bottle piece feeding device comprises a travelling crane, a bottle piece feeding hopper and a bottle piece storage bin, the travelling crane is located above the bottle piece feeding hopper, and a discharge port of the bottle piece feeding hopper is communicated with a feed port of the bottle piece storage bin through a material pipeline.

Further, the grain device is cut in screw extrusion includes screw extruder, doublestage fuse-element filter, casting band head, basin, pelleter, drier, rectilinear vibrating screen, screw extruder's discharge gate with the feed inlet intercommunication of doublestage fuse-element filter, the discharge gate of doublestage fuse-element filter with the feed inlet of casting band head is connected, the feed inlet of casting band head with pass through between the feed inlet of pelleter the basin is connected, the discharge gate of pelleter with the feed inlet intercommunication of drier, the discharge gate of drier with the feed inlet intercommunication of rectilinear vibrating screen, the discharge gate of rectilinear vibrating screen pass through material pipeline intercommunication waste bin and many feed bins compounding device.

Further, many feed bins compounding device includes the blending bunker, be provided with blending bunker feed inlet, blending bunker mix feed inlet, blending bunker gas outlet and blending bunker discharge gate on the blending bunker respectively, the blending bunker discharge gate pass through the material pipeline respectively with the automatic packing machine with blending bunker mix the feed inlet intercommunication.

Preferably, the number of the mixing bins is at least 2, the capacity of each mixing bin is not less than 100 tons per bin, the air outlets of the mixing bins are communicated with a cyclone separator through a gas pipeline, and a dust collecting barrel is arranged at the lower part of the cyclone separator.

The arrangement of the plurality of mixing bins can enable one mixing bin to store the cut grains produced by the production line by other mixing bins while mixing materials, so that the problem that the mixing bins cannot receive the cut grains produced by the production line during mixing materials can be avoided, and the production efficiency of the production line is effectively improved; simultaneously, the blending bunker of large capacity can save more eager grain, and the eager grain homogeneous mixing that makes different time quantums from this in the product of packing warehouse entry behind the compounding, the quality difference is little between the product of different batches, and product quality is more even, stable.

In another aspect, the present invention provides a production process for recovering, granulating and recycling bottle flakes, using the production apparatus for recovering, granulating and recycling high-quality bottle flakes, using 3A-grade bottle flakes or bottle flakes subjected to primary selection, crushing, cleaning and drying as raw materials, sequentially performing the following steps:

1) quantitatively screening to remove metal materials;

2) sorting and removing non-white PET sheets and non-PET label paper;

3) preheating to remove the surface moisture of the PET sheet;

4) removing trace residual silt by screening, and removing the impurity content to be below 20 mg/Kg;

5) heating and drying to remove the water content in the PET sheet molecules to below 40 ppm;

6) heating the mixture to a process temperature by a screw extruder to melt the mixture into slurry in a molten state;

7) filtering the slurry for the first time, and further pressurizing for filtering for the second time;

8) casting, cooling and granulating the slurry subjected to the secondary filtration in sequence;

9) drying the cut granules until the water content is below 1.5%, and screening to remove the cutter connecting material and powder;

10) the screened cut granules are sent to a multi-material-bin mixing device;

11) sending the materials to a multi-bin material mixing device at different time intervals for granulating and uniformly mixing;

12) and outputting the uniformly mixed cut granules from a multi-bin material mixing device, packaging and warehousing or conveying the cut granules to a downstream.

Further, the heating and drying time in the step 5) is 23-25 hours.

Further, the process temperature in the step 6) is 260 ℃ and 270 ℃, and the second filtering precision in the step 7) is 20 μm.

Further, in step 11), the materials in the mixing bin enter the mixing bin again from the discharge port (505) of the mixing bin through the material pipeline and the mixing feed port (503) of the mixing bin under the action of the corresponding rotary valve and the corresponding conveying fan, and the cut particles entering at different time periods are fully mixed to homogenize the viscosity.

Further, in step 11), when one mixing bin is in mixing operation, the screened cut pellets are received and stored by the other mixing bin.

The invention has the positive effects that:

the recycled 3A standard bottle chips are used as raw materials, and after residues such as residual metal, labels, silt and the like are further removed, the impurities in the raw materials can be effectively removed through melt filtration, and the granules with higher quality can be obtained. Further removing impurities and purifying the bottle chips entering the screw extruder through the process steps of an eddy current separator, a material separator, a fluidized bed and a drying reaction tower, so that the content of polyvinyl chloride in the bottle chips is reduced to be below 30mg/Kg from 90-100 mg/Kg; the polyolefin content is reduced from 180-200 mg/Kg to below 40 mg/Kg; the moisture content is reduced from 1% to below 40 ppm; the content of the powder is reduced from 1900-2000 mg/Kg to below 50 mg/Kg; the content of other impurities (silt and metal) is reduced to be below 20mg/Kg from 280-300 mg/Kg, so that the quality of produced cut pellets is greatly improved, then the cut pellets produced in different time periods are uniformly mixed for multiple times through a multi-bin material mixing device, the viscosity of the cut pellets in the same material mixing bin is homogenized, high-quality cut pellets with stable and consistent performance indexes and reliability are provided for downstream, the stability and reliability of downstream production products are greatly improved, the probability of broken filaments and broken filaments in the downstream spinning field is greatly reduced, the dyeing uniformity and the dyeing property of the downstream are improved.

Each mixing bin in the multi-bin mixing device can be filled with at least 100 tons of slices, and then the multiple mixing and viscosity homogenizing outputs of the slices are unified, so that raw material products with stable quality and stable supply quantity are provided for the downstream.

The device and the process have the characteristic of high refinement degree, the defects of high cost, low quality and low yield of the existing process equipment are overcome, and the produced granulated particles can be used for producing downstream high-end products and even can be used as food-grade products.

Drawings

FIG. 1 is a schematic view showing the connection of the production apparatus of the present invention.

In the figure: a bottle flake feeding hopper-10, a bottle flake storage bin-11, a first rotary valve-12, a first conveying fan-13 and a travelling crane-14;

a first screw conveyor-20, an eddy current separator-21, a second screw conveyor-22, a third screw conveyor-23, a vibrating feeder-24, a material separator-25, a first centrifugal fan-26 and a feed hopper-27;

negative pressure bin-300, second rotary valve-301, intermediate bin-302, third rotary valve-303, fluidized bed-304, circular vibrating screen-305, fourth rotary valve-306, second conveying fan-307, drying reaction tower-308, second centrifugal fan-309, crystallization heater-310, cyclone separator-311, negative pressure fan-312, drying heater-313 and high pressure dehumidifier-314;

a screw extruder-400, a first melt filter-401, a booster pump-402, a second melt filter-403, a casting belt head-404, a granulator-405, a drier-406, a linear vibrating screen-407, a fifth rotary valve-408, a third conveying fan-409 and a water tank-410;

a waste bin-500, a first mixing bin-501, a mixing bin feed inlet-502, a mixing bin mixing feed inlet-503, a mixing bin gas outlet-504, a mixing bin discharge outlet-505, a sixth rotary valve-506, a fourth conveying fan-507, a cyclone-508, a dust collecting barrel-509, a second mixing bin-511, a seventh rotary valve-516 and a fifth conveying fan-517;

a first automatic packing machine-600 and a second automatic packing machine-601.

Detailed Description

The present invention will now be described in connection with certain preferred embodiments with reference to the following illustrative figures. It is emphasized that the description herein is for the clarity of illustration of how the several forms of the invention may be practiced and is not intended to be limited to the specific figures and embodiments shown.

Example (b): as shown in figure 1, a production device for recycling, granulating and reusing high-quality bottle flakes comprises a bottle flake feeding device, an impurity removal and drying device, a screw extrusion and granulation device and a multi-bin mixing device,

wherein the bottle flake feeding device mainly comprises a bottle flake feeding hopper 10 and a bottle flake storage bin 11, a discharge port of the bottle flake feeding hopper is communicated with a feed port of the bottle flake storage bin through a material pipeline, the material pipeline of the discharge port of the bottle flake feeding hopper is provided with a first rotary valve 12 and a first conveying fan 13,

the impurity removal drying device comprises an eddy current separator 21, a material separator 25, a fluidized bed 304, a circular vibrating screen 305 and a drying reaction tower 308 which are sequentially arranged, wherein a discharge port of a bottle flake storage bin 11 is sequentially provided with a first spiral conveyor 20, an eddy current separator 21, a second spiral conveyor 22, a third spiral conveyor 23, a vibrating feeder 24 and a material separator 24, the eddy current separator 21 selects a TLFXP-14 model product of Zhejiang Tian mechatronics and electromagnetics Limited company, and the material separator 24 selects a 6SXZ-300CL model product of Hefei Meiya photoelectricity technology Limited company.

The discharge port of the material sorting machine 24 is sequentially communicated with a negative pressure bin 300, a second rotary valve 301, an intermediate bin 302, a third rotary valve 303, a fluidized bed 304, a circular vibrating screen 305, a fourth rotary valve 306, a second conveying fan 307, a drying reaction tower 308 and a high-pressure dehumidifier 314 through material pipes, wherein the fluidized bed 304 is also provided with an air circulation system consisting of a second centrifugal fan 309, a crystallization heater 310 and a cyclone separator 311, the circular vibrating screen 305 is arranged on the material pipe between the discharge port of the fluidized bed 304 and the fourth rotary valve 306, the circular vibrating screen 305 is an XF1500DE model product of Pioneer vibration machinery Co., Ltd, of Xinxiang province, and the high-pressure dehumidifier 314 is a TPE-650 model product of Wutai purification equipment Co., Ltd.

The screw extrusion granulating device comprises a screw extruder 400, a double-stage melt filter consisting of a first melt filter 401, a booster pump 402 and a second melt filter 403, a casting belt head 404, a water tank 410, a granulator 405, a drying machine 406 and a linear vibrating screen 407 which are arranged in sequence, wherein a discharge port of the granulator 405 is communicated with a feed port of the drying machine 406, a discharge port of the drying machine 406 is communicated with a feed port of the linear vibrating screen 407, a discharge port of the linear vibrating screen 407 is respectively communicated with a waste bin 500 and a multi-bin mixing device through material pipelines, a fifth conveying fan 408 and a third conveying fan 507 are arranged on the material pipeline of the discharge port of the linear vibrating screen 407, and the screw extruder 400 is a chemical fiber rotary valve of Shanghai Jinwei mechanical manufacturing Limited company

A screw extruder and a double-stage melt filter are CPF-PT-15C products of Zhejiang Yufeng mechanical limited, wherein a granulator 405 including a casting belt head 404, a water tank 410, a drying machine 406 and a linear vibrating screen 407 is TSQW200Z products of Kalimei (Luoyang) electromechanical limited.

The multi-bin mixing device comprises mixing bins, wherein the mixing bins comprise a first mixing bin 501 and a second mixing bin 511; the first mixing bunker 501 is provided with a mixing bunker feeding inlet 502, a mixing bunker mixing feeding inlet 503, a mixing bunker air outlet 504 on the bunker body, and a mixing bunker discharging outlet 505 at the bottom of the first mixing bunker 501, wherein the mixing bunker discharging outlet 505 is communicated with the mixing bunker mixing feeding inlet 503 through a material pipeline provided with a sixth rotary valve 506 and a fourth conveying fan 507, and the mixing bunker discharging outlet 505 is communicated with the first automatic packing machine 600 through the material pipeline.

The silo body of the second mixing silo 511 is respectively provided with a mixing silo feed inlet, a mixing silo mixing feed inlet and a mixing silo gas outlet, and the bottom of the silo body of the second mixing silo 511 is provided with a mixing silo discharge outlet, the mixing silo discharge outlet and the mixing silo mixing feed inlet are communicated through a material pipeline provided with a seventh rotary valve 516 and a fifth conveying fan 517, and the mixing silo discharge outlet on the second mixing silo 511 is communicated with the second automatic packing machine 601 through a material pipeline. The first automatic packing machine 600 and the second automatic packing machine 601 are selected from LPS-1000GF model of Kunshan mechanical and electrical engineering Co.

The feed inlets of the mixing bins on the first mixing bin 501 and the second mixing bin 511 are respectively communicated with the discharge outlet of the linear vibrating screen 407 through material pipelines.

The gas outlets of the mixing bins are respectively communicated with the cyclone separator 508 through gas pipelines, and the lower part of the cyclone separator 508 is provided with a dust collecting barrel 509.

This production technology that granulation was recycled is retrieved to high-quality bottle piece uses the apparatus for producing that granulation was retrieved to high-quality bottle piece and is recycled to use 3A level bottle piece or the bottle piece after primary election, crushing, washing, drying process as raw and other materials, carries out according to following step in proper order:

1) quantitatively screening to remove metal materials;

2) sorting and removing non-white PET sheets and non-PET label paper;

3) preheating, dewatering and dehumidifying;

4) residual trace silt is screened out, and the impurity content is removed to be below 20 mg/Kg;

5) heating and drying to remove the water content in the PET sheet molecules to below 40ppm, wherein the heating and drying time is 23-25 hours;

6) heating the mixture to a process temperature of 260 ℃ and 270 ℃ by a screw extruder to melt the mixture into slurry in a molten state;

7) carrying out primary filtration on the slurry, and further pressurizing for carrying out secondary filtration, wherein the precision of the secondary filtration is 20 microns;

10) the screened cut granules are sent to a multi-material-bin mixing device;

11) sending the materials to a multi-bin material mixing device at different time intervals for granulating and uniformly mixing; in this step, under the action of the corresponding rotary valve and the conveying fan, the materials in the mixing bin enter the mixing bin again from the discharge port 505 of the mixing bin through the material pipeline and the mixing feed port 503 of the mixing bin, and the cut granules entering at different time periods are fully mixed to homogenize the viscosity; when one mixing bin is used for mixing materials, the other mixing bin is used for receiving, storing and screening the cut particles.

Referring to the attached drawing 1, the operation of the device in the production process steps is that beverage bottles made of PET materials recovered from towns are primarily selected, crushed, cleaned and dried to form 3A-grade standard bottle flakes, or 3A-grade standard bottle flakes are directly recovered, and then the bottles are put into a bottle flake feeding hopper 10 through a travelling crane 14 and are conveyed into a bottle flake storage bin 11 through a first rotary valve 12 and a first conveying fan 13, wherein the capacity of the bottle flake storage bin 11 is 150 tons per bin.

Then lifted by a first screw conveyor 20 and quantitatively conveyed to a feeding port of an eddy current separator 21, the material is vibrated and paved, and uniformly passes through the eddy current separator, metal materials such as copper, aluminum, iron and the like which may exist in the bottle flakes are separated from the bottle flakes, the metal bottle flakes are removed, then the material is guided by a second screw conveyor 22 and conveyed to a third screw conveyor 23 to enable the bottle flakes to be quantitatively lifted to a vibrating feeder 24 to be vibrated and paved, then the material is conveyed to a feeding port of a material separator 25, label paper and non-white PET (polyethylene terephthalate) sheets which are not made of PET (polyethylene terephthalate) are removed from the bottle flakes in the material separator 25, then the separated bottle flakes are conveyed to a negative pressure bin 300 through a negative pressure fan 312, are preheated by a fluidized bed 304 to remove moisture on the surfaces of the bottle flakes, then fall into a circular vibrating screen 305 by the gravity of the bottle flakes, and a small part of uncleaned silt adhered to the surfaces of the bottle flakes is removed in the circular vibrating screen 305 under the action of exciting force, the content of impurities such as metal, label paper, non-white PET sheet, silt, etc. after impurity removal is below 20 mg/Kg. Then, the dried bottle flakes are sent into a drying reaction tower 308 through a fourth rotary valve 306 and a second conveying fan 307 to be heated and dried, the bottle flakes are heated by hot air in the drying reaction tower 308 through a drying heater 313 and a high-pressure dehumidifier 314 and stay for 23-25 hours, and moisture in the interior of the molecules of the bottle flakes is dried to be below 40 ppm.

And then feeding the dried sheet into a screw extruder 400, heating the heated area of the screw extruder 400 to a process temperature of 265 ℃, melting the sheet into a molten state, filtering the sheet by a first melt filter 401, pressurizing the sheet by a booster pump 402, filtering the sheet by a second melt filter 403, feeding the sheet into a casting belt of a casting belt head 404, cooling the sheet by a water tank 410, cutting the sheet into particles by a granulator 405, and drying the particles by a drier 406 until the water content is below 1.5%, so as to avoid the situation that the vibrating screen does not work due to the agglomeration of excessive water in the material. After being dried, the material is conveyed to a linear vibrating screen 407 to be screened and removed of the continuous cutting material and the powder, and then the material is conveyed to a waste bin 500 or a first mixing bin 501 or a second mixing bin 511 through a fifth rotary valve 408 and a third conveying fan 409, wherein the waste bin 500 is used for collecting and storing the material which is detected to be unqualified.

The first mixing bin 501 and the second mixing bin 511 have the same capacity, and can be used for filling 100-plus-200-ton/bin pellets, the first mixing bin 501 and the second mixing bin 511 are respectively 150-ton/bin, when the first mixing bin 501 is filled with pellets, the first mixing bin 501 is switched to the second mixing bin 511, the first mixing bin 501 filled with the pellets is circularly conveyed through the sixth rotary valve 506 and the fourth conveying fan 507, the pellets entering the first mixing bin 501 at different time intervals are fully mixed to homogenize viscosity, the pellets fall into the first automatic packaging machine 600 after being mixed for 3 times and are weighed and packaged, and the packaged pellets or chips can be put in storage for sale or directly conveyed to the downstream.

Although the invention has been described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to the invention without departing from the scope of the invention.

Claims

1. The utility model provides a production device that granulation was recycled is retrieved to high-quality bottle piece, throws material device, screw extrusion and cuts grain device, its characterized in that including the bottle piece: this device uses 3A level bottle piece as raw and other materials, and the bottle piece is thrown and is equipped with edulcoration drying device between material device and the eager grain device of screw extrusion, edulcoration drying device is including eddy current sorter (21), material sorter (25), fluidized bed (304), circular shale shaker (305) and dry reaction tower (308) that set gradually, the output of the eager grain device of screw extrusion is equipped with many feed bins compounding device.

2. The production apparatus for recycling, granulating and reusing high-quality bottle chips according to claim 1, wherein: the bottle piece feeding device comprises a travelling crane (14), a bottle piece feeding hopper (10) and a bottle piece storage bin (11), wherein the travelling crane (14) is located above the bottle piece feeding hopper (10), and a discharge hole of the bottle piece feeding hopper (10) is communicated with a feed inlet of the bottle piece storage bin (11) through a material pipeline.

3. The production apparatus for recycling, granulating and reusing high-quality bottle chips according to claim 1, wherein: the screw extrusion granulating device comprises a screw extruder (400), a double-stage melt filter, a casting belt head (404), a water tank (410), a granulator (405), a drying machine (406) and a linear vibrating screen (407) which are arranged in sequence, the discharge hole of the screw extruder (400) is communicated with the feed inlet of the double-stage melt filter, the discharge hole of the double-stage melt filter is connected with the feed inlet of the casting belt head (404), the feed inlet of the casting belt head (404) is connected with the feed inlet of the granulator (405) through the water tank (410), the discharge hole of the granulator (405) is communicated with the feed hole of the dryer (406), the discharge hole of the drying machine (406) is communicated with the feed hole of the linear vibrating screen (407), and a discharge port of the linear vibrating screen (407) is communicated with a waste bin (500) and the multi-bin mixing device through a material pipeline.

4. The production apparatus for recycling, granulating and reusing high-quality bottle chips according to claim 1, wherein: many feed bins compounding device includes the blending bunker, be provided with blending bunker feed inlet (502), blending bunker mix feed inlet (503), blending bunker gas outlet (504) and blending bunker discharge gate (505) on the blending bunker respectively, blending bunker discharge gate (505) through the material pipeline respectively with automatic packing machine (600) with blending bunker mix feed inlet (503) intercommunication.

5. The production apparatus for recycling, granulating and reusing high-quality bottle flakes according to claim 4, wherein: the number of the mixing bins is at least 2, the capacity of each mixing bin is not less than 100 tons per bin, the gas outlet (504) of each mixing bin is communicated with a cyclone separator (508) through a gas pipeline, and a dust collecting barrel (509) is arranged at the lower part of each cyclone separator (508).

6. A production process for recovering, granulating and recycling bottle flakes is characterized by comprising the following steps: the production device for recycling and granulating the high-quality bottle flakes according to claims 1 to 5, which takes 3A-grade bottle flakes or bottle flakes after primary selection, crushing, cleaning and drying as raw materials, and sequentially comprises the following steps:

1) quantitatively screening to remove metal materials;

2) sorting and removing non-white PET sheets and non-PET label paper;

3) preheating to remove the surface moisture of the PET sheet;

10) the screened cut granules are sent to a multi-material-bin mixing device;

7. The production process for recovering, granulating and recycling bottle flakes according to claim 6, wherein the production process comprises the following steps: the heating and drying time in the step 5) is 23-25 hours.

8. The production process for recovering, granulating and recycling bottle flakes according to claim 6, wherein the production process comprises the following steps: the process temperature in the step 6) is 260 ℃ and 270 ℃, and the secondary filtering precision in the step 7) is 20 μm.

9. The production process for recovering, granulating and recycling bottle flakes according to claim 6, wherein the production process comprises the following steps: in the step 11), the materials in the mixing bin enter the mixing bin again from a discharge port (505) of the mixing bin through a material pipeline and a mixing feed port (503) of the mixing bin under the action of a corresponding rotary valve and a corresponding conveying fan, and the cut particles entering at different time periods are fully mixed to homogenize the viscosity.

10. The production process for recovering, granulating and recycling bottle flakes according to claim 6, wherein the production process comprises the following steps: in step 11), when one mixing bin is in mixing operation, the other mixing bin receives and stores the screened cut granules.