CN115139431A

CN115139431A - Waste plastic treatment system and treatment method

Info

Publication number: CN115139431A
Application number: CN202210726939.0A
Authority: CN
Inventors: 李建军; 李凡; 陈平绪; 叶南飚; 李聪; 彭智; 刘思杨; 陈锬; 王一行; 刘超
Original assignee: Jiangsu Jinfa Renewable Resources Co ltd; Kingfa Science and Technology Co Ltd; Guangdong Kingfa Science and Technology Co Ltd
Current assignee: Jiangsu Jinfa Renewable Resources Co ltd; Kingfa Science and Technology Co Ltd; Guangdong Kingfa Science and Technology Co Ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2022-10-04

Abstract

The invention relates to the technical field of solid waste treatment, in particular to a waste plastic treatment system and a treatment method, wherein the treatment system comprises a magnetic separation device, a crushing device, a prewashing device, a friction boiling device, a rinsing device, a drying device, a sorting device and a color sorting device which are connected in sequence; the rinsing device comprises a first rinsing tank, and the first rinsing tank comprises a rinsing groove, and a second material stirring mechanism and a second material discharging mechanism which are arranged in the rinsing groove, wherein a snakelike flow channel is arranged in the rinsing groove, the second material stirring mechanism is arranged along the flow channel, and the second material discharging mechanism is arranged at the material discharging end of the flow channel. The invention is convenient to use, can be suitable for the recovery treatment of various waste plastics, and improves the recovery rate of the waste plastics.

Description

Waste plastic treatment system and treatment method

Technical Field

The invention relates to the technical field of solid waste treatment, in particular to a waste plastic treatment system and a waste plastic treatment method.

Background

In daily necessities, plastics are very common material of the goods, and the using amount is very large, so the amount of the generated waste plastics cannot be in a small amount. If the plastic articles used in daily life are not recycled well after being scrapped, the environment is damaged and the health of people is harmed.

The prior art discloses a production process of PET bottle flake reclaimed materials, which comprises the following steps: unpacking by a unpacking machine, classifying and screening unpacked plastic bottles, separating and selecting the sorted PET plastic bottles through a color selector, separating the PET plastic bottles according to colors, pre-washing the whole bottles, selecting sundries through a platform, crushing the PET plastic bottles through a crusher, conveying the PET plastic bottles to a dehydrator for dehydration, performing high-temperature hot washing sterilization through alkali liquor, performing further high-speed friction and dehydration, then performing multiple washing and dehydration processes, finally conveying the PET bottle chips subjected to multiple times of washing into a label blowing machine for a label blowing process, conveying the PET bottle chips subjected to label blowing to a packing machine for packing, and conveying the PET bottle chips subjected to label blowing to a discharging bin for storage. The PET bottle flake production process has the advantages of good cleaning effect, high recovery production efficiency, labor intensity saving, cost saving and high economic benefit.

However, in the above scheme, the sequence of steps such as color separation and sorting, high-temperature cleaning and the like is only suitable for the treatment process of the PET bottle flakes, and is not suitable for the recovery treatment of other plastics.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a waste plastic treatment system and a waste plastic treatment method, is convenient to use, can be suitable for the recovery treatment of various waste plastics, and improves the recovery rate of the waste plastics.

In order to solve the technical problems, the invention adopts the technical scheme that:

the waste plastic treatment system comprises a magnetic separation device, a crushing device, a prewashing device, a friction boiling device, a rinsing device, a drying device, a sorting device and a color sorting device which are connected in sequence; the rinsing device comprises a first rinsing tank, the first rinsing tank comprises a rinsing groove, and a second material stirring mechanism and a second material discharging mechanism which are arranged in the rinsing groove, a snakelike flow channel is arranged in the rinsing groove, the second material stirring mechanism is arranged along the flow channel, and the second material discharging mechanism is arranged at the material discharging end of the flow channel.

Preferably, the second material stirring mechanism comprises a plurality of second rollers and a second driving part, the second rollers are uniformly distributed along the flow channel, and second blades are uniformly distributed on the circumferential surface of each second roller; the second driving piece is connected with the second rollers, and the adjacent second rollers on the same axis are connected through a reversing gear box; the second discharging mechanism comprises a second discharging groove connected with the discharging end of the flow channel and a second chain wheel and chain mechanism arranged in the second discharging groove, and a plurality of second rake nail rows are connected to the second chain wheel and chain mechanism.

Preferably, the first rinsing pool further comprises a second impurity conveying mechanism and a third filtering and water returning mechanism, and the second impurity conveying mechanism is located below the second material stirring mechanism; the rinsing device also comprises a third dehydrator communicated with the second discharging mechanism, a water outlet of the third dehydrator is communicated with a feed inlet of a third filtering backwater mechanism, and a water outlet of the third filtering backwater mechanism is communicated with the rinsing groove.

Preferably, the second impurity conveying mechanism comprises a second screw movably connected to the bottom of the rinsing tank, and a sixth spiral feeder communicated with the bottom of the rinsing tank; the third filtering backwater mechanism is a second circular vibrating screen, the water outlet of the third dehydrator is communicated with the feed inlet of the second circular vibrating screen, and the water outlet of the second circular vibrating screen is communicated with the rinsing tank.

Preferably, the rinsing device further comprises a second rinsing tank and a fourth dehydrator communicated with the second rinsing tank, a discharge end of the third dehydrator is communicated with a feed end of the second rinsing tank, and a discharge port of the fourth dehydrator is communicated with a feed end of the drying device.

Preferably, the prewashing device comprises a separation sedimentation tank, and the feed end of the separation sedimentation tank is communicated with the discharge end of the crushing device; wherein: the separation sedimentation tank includes the prewashing groove in advance and locates first group material mechanism, the first discharge mechanism in the prewashing groove, first group material mechanism arranges along material direction of delivery and locates be close to open position in the prewashing groove, first discharge mechanism locates the discharge end of prewashing groove in advance, the discharge end and the first hydroextractor of prewashing groove are linked together.

Preferably, the prewashing device further comprises a first dehydrator communicated with the separation sedimentation tank, and a discharge port of the first dehydrator is communicated with a feed end of the friction boiling and washing device; the separation and sedimentation tank also comprises a first impurity conveying mechanism and a first filtering and water returning mechanism, and the first impurity conveying mechanism is positioned below the first material stirring mechanism; the water outlet of the first dehydrator is communicated with the feed inlet of the first filtering water return mechanism, and the water outlet of the first filtering water return mechanism is communicated with the prewashing groove.

Preferably, the prewashing device further comprises a first spiral feeder and a third spiral feeder, wherein the first spiral feeder, the separation sedimentation tank, the third spiral feeder and the first dehydrator are sequentially connected and communicated; and the feeding end of the first spiral feeder is connected and communicated with the discharging end of the crushing device.

Preferably, the friction cooking device comprises a friction cooker and a second dewatering machine in communication with the friction cooker; the friction cooking machine comprises a plurality of cooking barrels which are sequentially communicated end to end, a first stirring and conveying mechanism is arranged in each cooking barrel, and a heating mechanism is connected to each cooking barrel; the discharge end of the friction cooking machine is also communicated with a second filtering water return mechanism, and the water outlet of the second filtering water return mechanism is communicated with the cooking barrel.

Preferably, the second water filtering and returning mechanism comprises a fourth spiral feeder and a guide pipe, a feed inlet of the fourth spiral feeder is communicated with a discharge end of the cooking barrel, and a discharge outlet of the fourth spiral feeder is communicated with a feed inlet of the second dehydrator; one end of the guide pipe is communicated with the filter hole of the fourth spiral feeder, and the other end of the guide pipe is communicated with the cooking barrel.

Preferably, the friction cooking and washing device further comprises a fifth spiral feeder, and the friction cooking machine is connected and communicated with the second dehydrator through the fifth spiral feeder; and the discharge port of the second dehydrator is communicated with the feed end of the rinsing device.

Preferably, the color sorting device comprises a second hoister, a first mixing machine, a buffer bin, a first color sorting machine and a second color sorting machine which are sequentially connected and communicated, and a feed inlet of the second hoister is communicated with a discharge end of the sorting device.

Preferably, the waste plastic treatment system further comprises a packing device, and a feeding end of the packing device is communicated with a discharging end of the color sorting device.

The invention also provides a waste plastic treatment method, which comprises the following steps:

s1, magnetic separation: carrying out magnetic separation treatment on the waste plastic material to be treated to remove metal impurities;

s2, crushing: crushing and thinning the magnetically-separated material to obtain a fragment material;

s3, prewashing: pre-washing the fragment materials through a separation sedimentation tank to remove silt and residues, and then dehydrating through a first dehydrator;

s4, oil stain cleaning: adding a detergent and an alkali solution into a friction cooking machine, carrying out hot alkali cleaning on the pre-cleaned fragment material through the friction cooking machine, and then carrying out dehydration treatment through a second dehydrator to obtain the deoiled fragment material;

s5, rinsing: the deoiled fragment materials are sequentially rinsed and dehydrated for two times through a first rinsing tank, a third dehydrator, a second rinsing tank and a fourth dehydrator, so that the residual of a detergent is reduced;

s6, drying: heating and drying the rinsed fragment materials, and further removing water on the surfaces of the fragment materials;

s7, label blowing: performing label blowing treatment on the dried fragment materials to remove labels and film impurities on the fragment materials;

s8, color selection: and performing at least one color selection treatment on the fragment materials after the label blowing is finished, and removing variegated fragment materials to obtain a target finished product material.

Further, the step S3 specifically includes the following steps:

s31, putting the fragment materials into a prewashing groove filled with clear water, and stirring the fragment materials floating on the water surface through a first stirring mechanism to drive the fragment materials to move towards the direction of a first discharging mechanism;

s32, the fragment materials in the prewashing groove are moved out of the prewashing groove through a first discharging mechanism, and dehydration treatment is carried out through a first dehydrator;

s33, filtering the sewage in the first dehydrator through a first filtering and water returning mechanism and then returning the sewage into the prewashing tank;

s34, settling silt and residue impurities in the fragment materials into the bottom of the pre-washing tank, and conveying and discharging the sediment and the residue impurities through a first impurity conveying mechanism.

Further, the step S4 specifically includes the following steps:

s41, adding an alkali solution and a detergent into the cooking barrel, and starting a first stirring and conveying mechanism and a heating mechanism to stir and preheat liquid in the barrel; wherein the alkali concentration of the alkali solution is 2-5%;

s42, putting the pre-washed fragment materials into the cooking barrel to be thermally stirred and cleaned; wherein the heating temperature of the heating mechanism is 40-80 ℃;

s43, the fragment materials sequentially pass through each steaming bucket to be thermally cleaned for multiple times, and then are dehydrated through a second dehydrator;

and S44, liquid flowing out of the cooking barrel is filtered by a second filtering water return mechanism and then returns to the cooking barrel.

Further, the step S5 specifically includes the following steps:

s51, putting the fragment materials subjected to oil stain removal into a rinsing tank filled with clear water, and stirring the fragment materials floating on the water surface through a second stirring mechanism to drive the fragment materials to move along the flow channel;

s52, detecting the pH value of the liquid in the rinsing tank in real time, and controlling the pH value to be less than or equal to 9;

s53, moving the fragment materials to a second discharging mechanism, discharging, and then dehydrating through a third dehydrator; in the dehydration process, the sewage in the third dehydrator is filtered by a third filtering and water returning mechanism and then returns to the rinsing tank; silt and residue impurities in the fragment materials sink into the bottom of the rinsing tank and are transported and discharged through a second impurity conveying mechanism;

s54, allowing the fragment materials dehydrated by the third dehydrator to enter a second rinsing pool for secondary rinsing; in the process of secondary rinsing, detecting the pH value of the liquid in the second rinsing pool in real time, and controlling the pH value to be less than or equal to 7.5;

and S55, dehydrating the fragment materials subjected to secondary rinsing through a fourth dehydrator.

Further, the step S8 specifically includes the following steps:

s81, putting the fragment materials subjected to label blowing into a first mixer for uniform mixing;

s82, putting the uniformly mixed fragment materials into a first color selector to remove color impurities;

and S83, putting the fragment material subjected to the first color selection into a second color selector to perform second color impurity removal, and finally obtaining a target finished product material.

Further, the step S82 specifically includes the following steps:

s821, feeding the fragmented materials into a partial color selection channel of a first color selector to perform color selection to obtain a first target finished material group and a first mixed material group;

s822, transferring the first mixed color material group to the rest color selection channel for color selection, and then converging the obtained target finished product material into the first target finished product material group;

the step S83 specifically includes the following steps:

s831, putting the first target finished product material group obtained in the step S822 into a part of color sorting channels of a second color sorter for color sorting to obtain a second target finished product material group and a second variegated color material group;

s832, transferring the second mixed material group to the color sorting channel of the rest part for color sorting, and then converging the obtained target finished material into the second target finished material group; in the second target product group obtained in step S832, the proportion of variegated color is not more than 2%.

Further, the method also comprises the step S9: packaging: and uniformly mixing the target finished product materials, and finally packaging.

Compared with the prior art, the invention has the beneficial effects that:

the invention relates to a waste plastic treatment system and a treatment method, which remove metal impurities in waste plastic materials through magnetic separation treatment, and then crush and refine the waste plastic materials to obtain fragment materials, thereby facilitating subsequent cleaning treatment; then, pre-washing the fragment materials to preliminarily remove silt and residue impurities in the materials; then, the fragment materials are subjected to hot cleaning by using a detergent, so that oil stains on the surfaces of the fragment materials can be removed, and the fragment materials are subjected to at least one rinsing treatment to remove the detergent remained on the fragment materials; and then, drying and label blowing are carried out, residual labels or film impurities on the fragment materials are removed, the fragment materials obtained at the moment are the fragment materials for removing oil stains and surface coverings, the impurity removal efficiency of the subsequent color sorting step can be improved, color misrecognition caused by the oil stains or the surface coverings is avoided, and the yield of the recovered materials is prevented from being influenced.

Drawings

FIG. 1 is a schematic structural diagram of a waste lunch box processing system according to the present invention;

FIG. 2 is a schematic structural view of the magnetic separation apparatus of the present invention;

FIG. 3 is a schematic view of the crushing apparatus according to the present invention;

FIG. 4 is a schematic view showing the internal structure of the crushing apparatus of the present invention;

FIG. 5 is a schematic view of the pre-washing apparatus according to the present invention;

FIG. 6 is a schematic view of the structure of the separation and sedimentation tank according to the present invention;

FIG. 7 is a schematic structural view of another perspective of the separation and sedimentation tank of the present invention;

FIG. 8 is a schematic view of the construction of the frictional boiling device of the present invention;

FIG. 9 is a schematic view of the structure of the frictional cooking machine of the present invention;

FIG. 10 is a schematic view of the friction cooker of the present invention from another perspective;

FIG. 11 is a schematic view showing the internal structure of the friction cooker of the present invention;

FIG. 12 is a schematic view of the structure of a rinsing apparatus according to the present invention;

FIG. 13 is a schematic view of the first rinse tank of the present invention;

FIG. 14 is a schematic view of the structure of the drying apparatus according to the present invention;

FIG. 15 is a schematic view of a color sorter according to the present invention;

FIG. 16 is a schematic view of a partial structure of a color selection apparatus according to the present invention;

FIG. 17 is a flow chart of a method for treating waste plastics according to the present invention;

FIG. 18 is a line graph of the effect of different concentrations of alkali solutions on stain removal performance according to the present invention.

The graphic symbols are illustrated as follows:

1-magnetic separation device, 11-magnetic separator, 12-conveyor belt, 13-sorting platform, 14-sorting discharge hopper, 2-crushing device, 21-material cylinder, 22-crushing feed inlet, 23-main shaft, 24-crushing driving member, 25-moving blade, 26-stationary blade, 27-screen, 28-crushing discharge outlet, 3-prewashing device, 31-first spiral feeder, 32-separation sedimentation tank, 321-prewashing tank, 322-first material shifting mechanism, 3221-first roller, 3222-first driving member, 3223-synchronous pulley, 323-first discharge mechanism, 3231-first discharge tank, 3232-first sprocket chain mechanism, 3233-first rake nail row, 324-first impurity conveying mechanism, 41-first screw, 3242-impurity hopper, 3243-second spiral feeder, 325-first return water filtering spiral feeder, 33-third return water filtering spiral feeder, 34-first dehydrator, 4-friction boiling device, 41-friction boiling device, 3242-impurity hopper, 3243-second spiral feeder, connecting pipe, 4142-second spiral feeder, 4121-boiling water stirring and heating and rinsing device, 4121-4142-boiling water feeding mechanism, 4121-boiling and 4121-stirring and 4142-stirring and heating and stirring and feeding mechanism, 5122-second paddle, 5123-second driving piece, 5124-reversing gear box, 513-second discharging mechanism, 5131-second discharging groove, 5132-second chain wheel and chain mechanism, 5133-second rake nail row, 514-second impurity conveying mechanism, 5141-second screw, 5142-sixth spiral feeding device, 515-third filtering and water returning mechanism, 516-flow channel, 52-third dehydrator, 53-second rinsing tank, 54-fourth dehydrator, 6-drying device, 61-heating barrel, 62-drying feed inlet, 63-drying discharge outlet, 64-second stirring and conveying mechanism, 7-sorting device, 8-color sorting device, 81-second hoister, 82-first mixer, 83-buffer bin, 84-first color sorter, 841-first color sorter body, 842-first feed hoister, 843-first disperser, 844-first checkweigher, 85-second color sorter, 852-second color sorter body, 853-second color sorter body, 854-second color sorter rack-second packaging hoister and 854-ton packaging frame device.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

Example 1

As shown in fig. 1, a first embodiment of a waste plastic treatment system according to the present invention comprises a magnetic separation device 1, a crushing device 2, a pre-washing device 3, a friction boiling device 4, a rinsing device 5, a drying device 6, a sorting device 7, and a color sorting device 8, which are connected in sequence.

As shown in fig. 12 and 13, the rinsing device 5 includes a first rinsing tank 51 and a third dehydrator 52 communicating with the first rinsing tank 51. The first rinsing tank 51 comprises a rinsing tank 511, and a second material stirring mechanism 512, a second discharging mechanism 513 and a second impurity conveying mechanism 514 which are arranged in the rinsing tank 511, wherein a serpentine flow channel 516 is arranged in the rinsing tank 511, and the feeding end and the discharging end of the flow channel 516 are respectively positioned at the first end and the second end of the rinsing tank 511; the second material stirring mechanisms 512 are arranged in the conveying direction of the flow channel 516, and the second discharging mechanism 513 is arranged at the discharging end of the flow channel 516; the second impurity conveying mechanism 514 is positioned below the second material stirring mechanism 512; the first rinsing pool 51 further comprises a third filtering and water returning mechanism 515, the water outlet of the third dehydrator 52 is communicated with the feed inlet of the third filtering and water returning mechanism 515, and the water outlet of the third filtering and water returning mechanism 515 is communicated with the rinsing tank 511.

Specifically, as shown in fig. 13, the second material shifting mechanism 512 includes a plurality of second rollers 5121 and a second driving member 5123, the plurality of second rollers 5121 are uniformly distributed along the flow channel 516, the circumferential surface of the second rollers 5121 is uniformly distributed with second blades 5122, and the second driving member 5123 is connected to the second rollers 5121. Because the flow channel 516 is arranged in a snake shape, the axial positions of part of the second rollers 5121 arranged on the flow channel 516 can be overlapped, and in order to save energy consumption, the second rollers 5121 on the same axial line are driven by the same second driving piece 5123; furthermore, in order to ensure that the final flow directions of the flow channels 516 all flow towards the direction of the second discharging mechanism 513, the second rollers 5121 which are adjacent on the same axis are connected through the reversing gear box 5124, so that the backflow of the broken materials in the flow channels 516 can be avoided.

As shown in fig. 12 and 13, the second discharging mechanism 513 includes a second discharging groove 5131 connected to the discharging end of the runner 516, and further includes a second chain wheel and chain mechanism 5132 disposed in the second discharging groove 5131, and the second chain wheel and chain mechanism 5132 is connected to a plurality of second rake nail rows 5133. In this embodiment, the portion of the second sprocket/chain mechanism 5132 having a floating surface can reduce the carry-over of moisture during discharging. The bottom of the second discharging groove 5131 is provided with a second opening structure for discharging, and the second opening structure is communicated with the third dehydrator 52.

As shown in fig. 13, the second impurity-transferring mechanism 514 includes a second screw 5141 rotatably connected to the bottom of the rinsing tank 511, the second screw 5141 extending from the first end to the second end of the rinsing tank 511; the second impurity delivery mechanism 514 further comprises a sixth screw feeder 5142 communicated with the bottom of the rinsing tank 511, and the second screw 5141 is used for transporting the residues in the rinsing tank 511 to the sixth screw feeder 5142 for collection, so as to facilitate subsequent centralized treatment.

As shown in fig. 12, the third filtering and water returning mechanism 515 is a second circular vibrating screen, the water outlet of the third dewatering machine 52 is communicated with the feed inlet of the second circular vibrating screen, and the water outlet of the second circular vibrating screen is communicated with the rinsing tank 511.

In this embodiment, the rinsing device 5 further includes a second rinsing tank 53 and a fourth dewatering machine 54 communicated with the second rinsing tank 53, a discharge end of the third dewatering machine 52 is communicated with a feed end of the second rinsing tank 53, and a discharge port of the fourth dewatering machine 54 is communicated with a feed end of the drying device 6. As shown in fig. 13, the second rinsing tank 53 has a structure similar to that of the first rinsing tank 51, and the second rinsing tank 53 is arranged to further increase the rinsing time and enable the debris materials to be rinsed again in a new clean water environment, thereby improving the rinsing effect and the rinsing efficiency.

Example 2

This embodiment is similar to embodiment 1, except that the prewashing apparatus 3 of this embodiment comprises a separation and sedimentation tank 32 and a first dewatering machine 34 communicating with the separation and sedimentation tank 32, the feeding end of the separation and sedimentation tank 32 communicates with the discharging end of the crushing apparatus 2, and the discharging end of the first dewatering machine 34 communicates with the feeding end of the friction boiling and washing apparatus 4.

As shown in fig. 5, in the present embodiment, the separation and sedimentation tank 32 includes a prewash tank 321, and a first material shifting mechanism 322, a first material discharging mechanism 323, and a first impurity conveying mechanism 324 which are arranged in the prewash tank 321, wherein the first material shifting mechanism 322 is arranged in the prewash tank 321 at a position close to the opening along the material conveying direction, the first material discharging mechanism 323 is arranged at the material discharging end of the prewash tank 321, and the material discharging end of the prewash tank 321 is communicated with the first dewatering machine 34; the first impurity conveying mechanism 324 is located below the first material shifting mechanism 322 and is communicated with the outside. The separation and sedimentation tank 32 further comprises a first filtering backwater mechanism 325, a water outlet of the first dehydrator 34 is communicated with a feed inlet of the first filtering backwater mechanism 325, a water outlet of the first filtering backwater mechanism 325 is communicated with the prewashing tank 321, and a discharge outlet of the first filtering backwater mechanism 325 is communicated with the outside.

Specifically, as shown in fig. 6 and 7, a first end of the prewash tank 321 is used for receiving the fragmented materials that have completed the crushing, and a second end of the prewash tank 321 is used for outputting the fragmented materials that have completed the prewash. The first material shifting mechanism 322 includes a first roller 3221 rotatably connected to the inside of the prewash tank 321, and a first driving member 3222 connected to the first roller 3221, wherein first paddles are uniformly distributed on a circumferential surface of the first roller 3221, and in this embodiment, the first roller 3221 is uniformly distributed along a first end to a second end of the prewash tank 321. In order to reduce energy consumption, two or three adjacent first rollers 3221 are connected through a synchronous pulley 3223, and a plurality of first rollers 3221 in the same synchronous pulley 3223 are driven by a first driving member 3222; specifically, the first driving member 3222 is a motor in this embodiment.

As shown in fig. 6 and 7, the first discharging mechanism 323 includes a first discharging chute 3231, and a first chain wheel and chain mechanism 3232 disposed in the first discharging chute 3231, and a plurality of first rake nail rows 3233 are connected to the first chain wheel and chain mechanism 3232; the first discharging chute 3231 is connected to and communicated with the second end of the prewashing tank 321, and the first sprocket/chain mechanism 3232 has a part floating on the water surface, so that the moisture can be reduced from being taken out during discharging. The bottom of the first discharging groove 3231 is provided with a first opening structure for discharging, and the first opening structure is communicated with the first dehydrator 34.

As shown in fig. 6 and 7, the first impurity transfer mechanism 324 includes a first screw 3241, an impurity hopper 3242, and a second screw feeder 3243, the first screw 3241 is disposed in the prewash tank 321 in a direction from a first end to a second end, and a feeding end of the second screw feeder 3243 is communicated with a bottom of the prewash tank 321 through the impurity hopper 3242; the discharge of the residue impurities is performed through the second screw feeder 3243.

As shown in fig. 5, the first filtering and water returning mechanism 325 is a first circular vibrating screen, the water outlet of the first dewatering machine 34 is communicated with the feed inlet of the first circular vibrating screen, and the filtering water outlet of the first circular vibrating screen is communicated with the pre-washing tank 321.

In this embodiment, the pre-washing device 3 further comprises a first spiral feeder 31 and a third spiral feeder 33, wherein the first spiral feeder 31, the separation sedimentation tank 32, the third spiral feeder 33 and the first dewatering machine 34 are connected and communicated in sequence; the feeding end of the first spiral feeder 31 is connected and communicated with the discharging end of the crushing device 2.

Example 3

This embodiment is similar to

embodiment

1 or 2, except that the friction cooking device 4 in this embodiment includes a friction cooker 41 and a second dehydrator 43 communicating with the friction cooker 41.

As shown in fig. 8 to 11, the friction cooking machine 41 of the present embodiment includes a plurality of cooking barrels 411 that are sequentially connected end to end, each cooking barrel 411 is provided with a first stirring and conveying mechanism 412 inside, and each cooking barrel 411 is connected with a heating mechanism 413; the discharge end of the friction cooking machine 41 is also communicated with a second filtering water return mechanism 414, and a filtering water outlet of the second filtering water return mechanism 414 is communicated with the cooking barrel 411.

Specifically, the friction cooking machine 41 in this embodiment includes eight cooking barrels 411 arranged in an array, the cooking barrels 411 are sequentially connected and communicated end to end through a connecting pipe 415 to form a serpentine hot cleaning flow channel, and a cooking and washing feed port 4111 and a cooking and washing discharge port are respectively arranged at an inlet and an outlet of the hot cleaning flow channel; as shown in fig. 9 and 10, in this embodiment, the cooking inlet 4111 is disposed at a top position of a first end of the first cooking barrel 411, a second end of the first cooking barrel 411 is connected to a second end of the second cooking barrel 411 through a connecting pipe 415, a first end of the second cooking barrel 411 is connected to a first end of the third cooking barrel 411 through a connecting pipe 415, and so on, and the cooking outlet is disposed at a bottom position of a first end of the eighth cooking barrel 411. The first cooking barrel 411 is further provided with a feeding tube 4112 for replenishing detergent, as shown in fig. 9. In the present embodiment, the heating mechanism 413 is a steam generator, and heats the steam by introducing the steam into the cooking barrel 411. It should be noted that the heating mechanism 413 may also be an electric heating tube or other heating components, and is not limited herein.

As shown in fig. 11, the first stirring and conveying mechanism 412 includes a first stirring screw 4121 provided along the extending direction of the cooking barrel 411, and a first stirring and driving member 4122 located outside the cooking barrel 411 and connected to the first stirring screw 4121. The first agitation driving member 4122 in this embodiment includes a motor and a speed reducer, and the motor is connected to the first agitation screw 4121 through the speed reducer.

As shown in fig. 8, the second filtered backwater mechanism 414 includes a fourth screw feeder 4141 and a duct 4142, a feed inlet of the fourth screw feeder 4141 is communicated with a boiling and washing discharge port, and a discharge port of the fourth screw feeder 4141 is communicated with a feed inlet of the second dewatering machine 43; one end of the duct 4142 is communicated with the filtering hole of the fourth spiral feeder 4141, the other end of the duct 4142 is communicated with the first cooking barrel 411, and the arrangement of the duct 4121 enables the cleaning water in the fourth spiral feeder 4141 to flow back into the cooking barrel 411 for recycling after being filtered by the filtering hole, thereby reducing the waste of water resources and lowering the cost.

The friction cooking and washing device 4 in this embodiment further comprises a fifth spiral feeder 42, and the friction cooking machine 41 is connected and communicated with the second dehydrator 43 through the fifth spiral feeder 42; the discharge port of the second dehydrator 43 is communicated with the feed end of the rinsing device 5.

Example 4

The present embodiment is similar to any one of embodiments 1 to 3, except that the color selecting device 8 in the present embodiment includes a second elevator 81, a first mixer 82, a buffer bin 83, a first color selector 84, and a second color selector 85, which are connected in sequence and communicated with each other; the second elevator 81 is communicated with the discharge end of the sorting device 7.

As shown in fig. 1, 15, and 16, the first color sorter 84 in this embodiment includes a first color sorter body 841, a first feeding elevator 842, a first dispenser 843, a first checking elevator 844; the discharge end of the first disperser 843 is communicated with the feed end of the first color selector body 841, and the buffer bin 83 is connected with the first disperser 843 through a first feed elevator 842; the feeding end and the discharging end of the first checking hoister 844 are respectively communicated with the discharging end and the feeding end of the first color sorter body 841.

The second color sorter 85 in this embodiment has a similar structure to the first color sorter 84, and the second color sorter 85 includes a second feeding elevator 852, a second dispenser 853, a second sorter body 851, and a second checking elevator 854 that are sequentially communicated; the feeding end of the second feeding hoister 852 is communicated with the first color sorter body 841, and the discharging end of the second checking hoister 854 is communicated with the feeding end of the first color sorter body 841.

As shown in fig. 16, the color sorter 8 further includes a ton bag holder 86, the ton bag holder 86 is disposed at a position close to the discharge port of the second color sorter body 851, and a ton bag is placed on the ton bag holder 86 and used for transporting the target finished product through the ton bag.

Example 5

The embodiment is similar to any one of embodiments 1 to 4, except that the waste plastic treatment system further includes a packing device 9, and a feeding end of the packing device 9 is communicated with a discharging end of the color sorting device 8. The packing device 9 in this embodiment is connected and communicated with the discharge end of the second color sorter 85. Specifically, packing apparatus 9 mixes the machine for the second, and in order to facilitate the transportation of finished product material, the discharge end department that the second mixes the machine also is provided with ton package frame and carries out ton package packing.

Example 6

This embodiment is similar to any one of embodiments 1-5, the difference lies in, as shown in fig. 1 and fig. 2, magnetic separator 1 includes magnet separator 11 in this embodiment, conveyer belt 12, letter sorting platform 13, sort out hopper 14, conveyer belt 12 includes that the raw materials carries the section and carries the section with the letter sorting that the raw materials was carried the section and is connected, the raw materials carries the section to slope upwards along the direction of transport and sets up, magnet separator 11 installs and is used for the magnetic separation in raw materials transport section department, letter sorting is carried the section and is located letter sorting platform 13 department, sort out hopper 14 and then locate the output end of letter sorting transport section, and sort out hopper 14 and breaker 2's feed end and be linked together. The material raw materials are magnetically separated by the magnetic separator 11 on the raw material conveying section, so that metal impurities can be removed; when getting into the letter sorting and carrying the section, then be used for sorting the material that does not belong to the plastics material for the raw materials material of 14 outputs is plastics raw materials material from letter sorting out.

Example 7

The present embodiment is similar to any one of embodiments 1 to 6, and is different in that, as shown in fig. 1, 3 and 4, the crushing device 2 in the present embodiment includes a material cylinder 21, a crushing feed inlet 22 arranged at the top of the material cylinder 21, and a crushing discharge outlet 28 arranged at the bottom of the material cylinder 21, the material cylinder 21 is rotatably connected with a main shaft 23, the main shaft 23 is connected with a plurality of moving blades 25, and the moving blades 25 are located in the material cylinder 21; the end of the main shaft 23 is connected with a crushing driving piece 24, and the crushing driving piece 24 is positioned outside the charging barrel 21; the inner side wall of the charging barrel 21 is fixedly connected with a plurality of fixed knives 26; a screen 27 is also provided in the barrel 21, the screen 27 being located directly above the crushing outlet 28. When the material crushing device is used, raw materials are put into the material barrel 21 from the crushing feed port 22, the crushing driving piece 24 drives the main shaft 23 to drive the movable knife 25 to rotate, the movable knife 25 and the fixed knife 26 are used for cutting in a coordinated mode to realize material crushing, and finally the thinning degree of discharging is controlled through the arrangement of the aperture of the screen 27.

Example 8

This embodiment is similar to any one of embodiments 1 to 7, except that, as shown in fig. 1 and 14, the drying device 6 in this embodiment includes a heating barrel 61, a drying material inlet 62 disposed at a top position of a first end of the heating barrel 61, and a drying material outlet 63 disposed at a bottom position of a second end of the heating barrel 61, and a second stirring and conveying mechanism 64 is rotatably connected to the heating barrel 61. The drying feed port 62 is communicated with the discharge port of the fourth dehydrator 54, and the drying discharge port 63 is communicated with the feed port of the sorting device 7. In the drying device 6, the fragment material in the barrel is heated by the heating barrel 61, and the residual moisture on the fragment material is evaporated by combining the stirring and conveying actions of the second stirring and conveying mechanism 64, so that the drying is realized, and finally, the material is discharged from the drying discharge port 63. In this embodiment, the second stirring and conveying mechanism 64 includes a second stirring screw and a second stirring driving member connected to the second stirring screw, the second stirring screw is rotatably connected to the inside of the heating barrel 61 and is disposed along the direction from the drying material inlet 62 to the drying material outlet 63, and the second stirring driving member is located outside the heating barrel 61.

Example 9

The embodiment is similar to any one of embodiments 1 to 8, except that, as shown in fig. 1, the sorting device 7 in the embodiment includes a hoisting machine and a Z-type sorting machine, the dry discharge port 63 is connected and communicated with the feed end of the Z-type sorting machine through the hoisting machine, and the discharge end of the Z-type sorting machine is communicated with a second hoisting machine 81.

Example 10

Fig. 17 shows a first embodiment of a waste plastic treatment method according to the present invention, which comprises the following steps:

s3, prewashing: the fragment materials are pre-washed by a separation sedimentation tank 32 to remove silt and residues, and then are dehydrated by a first dehydrator 34;

s4, oil stain cleaning: adding a detergent and an alkali solution into the friction cooking machine 41, carrying out hot alkali cleaning on the pre-cleaned fragment materials through the friction cooking machine 41, and then carrying out dehydration treatment through a second dehydrator 43 to obtain the deoiled fragment materials;

s5, rinsing: the deoiled fragment materials are rinsed and dehydrated for two times through a first rinsing tank 51, a third dehydrator 52, a second rinsing tank 53 and a fourth dehydrator 54 in sequence, so that the residual of a detergent is reduced;

s6, drying: heating and drying the rinsed fragment materials, and further removing the moisture on the surfaces of the fragment materials;

s8, color selection: and performing at least one color selection treatment on the fragment materials after the label blowing is finished, and removing variegated fragment materials to obtain the target finished product material.

According to the invention, metal impurities in the waste plastic materials are removed through magnetic separation treatment, and then the waste plastic materials are crushed and refined to obtain fragment materials, so that the subsequent cleaning treatment is facilitated; then, pre-washing the fragment materials to preliminarily remove silt and residue impurities in the materials; then, the fragment materials are subjected to hot cleaning by using a detergent, so that oil stains on the surfaces of the fragment materials can be removed, and the fragment materials are subjected to at least one rinsing treatment to remove the residual detergent on the fragment materials; and then, drying and label blowing are carried out to remove residual labels or film impurities on the fragment materials, the fragment materials obtained at the moment are the fragment materials for removing oil stains and surface coverings, the impurity removal efficiency of the subsequent color sorting step can be improved, color misrecognition caused by the oil stains or the surface coverings is avoided, and the yield of the recovered materials is prevented from being influenced. It should be noted that the waste plastic treatment method is applied to materials made of hard PP or PE, and the density of the materials is less than that of water.

Example 11

This example is similar to example 10, except that the structure of the separation and sedimentation tank 32 in this example is as shown in example 2. The separation and sedimentation tank 32 comprises a prewashing tank 321, a first material shifting mechanism 322, a first discharging mechanism 323 and a first impurity conveying mechanism 324, wherein the first material shifting mechanism 322, the first discharging mechanism 323 and the first impurity conveying mechanism 324 are arranged in the prewashing tank 321 in the material conveying direction, the first discharging mechanism 323 is arranged at the discharging end of the prewashing tank 321, and the discharging end of the prewashing tank 321 is communicated with the first dehydrator 34; the first impurity conveying mechanism 324 is located below the first material shifting mechanism 322 and is communicated with the outside. The separation sedimentation tank 32 further comprises a first filtering backwater mechanism 325, a water outlet of the first dehydrator 34 is communicated with a feed inlet of the first filtering backwater mechanism 325, a water outlet of the first filtering backwater mechanism 325 is communicated with the prewashing tank 321, and a discharge outlet of the first filtering backwater mechanism 325 is communicated with the outside.

Specifically, the first material shifting mechanism 322 includes a first roller 3221 rotatably connected to the inside of the prewash tank 321, and a first driving member 3222 connected to the first roller 3221, and first paddles are uniformly distributed on a circumferential surface of the first roller 3221. The first discharging mechanism 323 includes a first discharging chute 3231 and a first chain wheel and chain mechanism 3232 disposed in the first discharging chute 3231, and the first chain wheel and chain mechanism 3232 is connected to a plurality of first rake nail rows 3233. The first impurity conveying mechanism 324 comprises a first screw 3241, an impurity hopper 3242 and a second spiral feeder 3243, wherein the first screw 3241 is arranged in the prewash tank 321 along the direction from the first end to the second end, and the feeding end of the second spiral feeder 3243 is communicated with the bottom of the prewash tank 321 through the impurity hopper 3242; the discharge of the residue impurities is performed through the second screw feeder 3243. The first filtering backwater mechanism 325 is a first circular vibrating screen, the water outlet of the first dehydrator 34 is communicated with the feed inlet of the first circular vibrating screen, and the filtering water outlet of the first circular vibrating screen is communicated with the prewashing tank 321.

Wherein, step S3 specifically includes the following steps:

s31, putting the fragment materials into a prewashing tank 321 filled with clear water, wherein the fragment materials made of plastic can float on the water surface because the density of the fragment materials is smaller than that of water; the fragment materials floating on the water surface are stirred and cleaned through the rolling of the first roller 3221, and the fragment materials are stirred by the first paddle to be conveyed towards the first discharging groove 3231;

s32, driving a first chain wheel and chain mechanism 3232 to drive a first harrow pin row 3233 to move, conveying the fragment materials into a first discharge chute 3231 by the first harrow pin row 3233, and discharging the fragment materials to a first dehydrator 34 through a first opening structure for dehydration;

s33, the sewage removed from the first dehydrator 34 is filtered by the first circular vibrating screen and then returns to the prewashing tank 321, so that the energy consumption of water can be reduced, and the cost is reduced;

s34, settling silt and residue impurities in the fragment materials into the bottom of the prewashing tank 321, conveying the sediment and the residue impurities to an impurity hopper 3242 through a first screw 3241, and finally discharging the sediment and the residue impurities through a second spiral feeder 3243.

Example 12

This embodiment is similar to

embodiment

10 or 11, except that the structure of the friction cooker 41 in this embodiment is as shown in embodiment 3. The friction cooking machine 41 comprises a plurality of cooking barrels 411 which are sequentially communicated end to end, a first stirring and conveying mechanism 412 is arranged in each cooking barrel 411, and a heating mechanism 413 is connected to each cooking barrel 411; the discharge end of the friction cooking machine 41 is also communicated with a second filtering water return mechanism 414, and a filtering water outlet of the second filtering water return mechanism 414 is communicated with the cooking barrel 411. The plurality of steaming and boiling barrels 411 are sequentially connected and communicated end to end through a connecting pipe 415 to form a serpentine hot washing flow passage, and a boiling and washing feed inlet 4111 and a boiling and washing discharge outlet are respectively arranged at the inlet and the outlet of the hot washing flow passage.

The first stirring and conveying mechanism 412 includes a first stirring screw 4121 disposed along the extending direction of the cooking barrel 411, and further includes a first stirring driving member 4122 located outside the cooking barrel 411 and connected to the first stirring screw 4121. The first agitation driving member 4122 in this embodiment includes a motor and a speed reducer, and the motor is connected to the first agitation screw 4121 through the speed reducer.

Specifically, the second filtered backwater mechanism 414 includes a fourth spiral feeder 4141 and a conduit 4142, a feed inlet of the fourth spiral feeder 4141 is communicated with a boiling and washing discharge port, and a discharge port of the fourth spiral feeder 4141 is communicated with a feed inlet of the second dehydrator 43; one end of the guide tube 4142 is communicated with the filtering hole of the fourth screw feeder 4141, and the other end of the guide tube 4142 is communicated with the first cooking barrel 411.

Wherein, step S4 specifically includes the following steps:

s41, adding an alkali solution and a detergent into the cooking barrel 411, and starting the first stirring and conveying mechanism 412 and the heating mechanism 413 to stir and preheat liquid in the barrel; in this embodiment, the alkali solution is a NaOH solution, as shown in fig. 18, the stain removing ability of the NaOH solution is enhanced with the increase of the concentration, and when the concentration of the NaOH solution is greater than 0.5mol/L, the stain removing ability is slowed down, so that the concentration of the NaOH solution is 2 to 5% to achieve the effects of reducing the cost and reducing the energy consumption under the condition of ensuring the removing ability; note that the columns shown in fig. 18 are stain removal ratios, and the stain removal ratios are calculated in the following manner: setting the weight of the material before cleaning as m ₁ Let m be the weight of the stain obtained during the cleaning process ₂ Stain removal ratio = (m) ₁ -m ₂ )/m ₁ When the stain removal ratio is larger, the stain removal effect is better; and the concentration of the detergent is 2-5 kg/t;

s42, putting the pre-washed fragment materials into a first cooking barrel 411 through a cooking feed port 4111, and driving a first stirring driving piece 4122 to drive a first stirring screw 4121 to rotate, so that stirring heat cleaning is realized in the process of forward conveying the fragment materials along a spiral section of the first stirring screw 4121; wherein the heating temperature of the heating mechanism 413 is 40-80 ℃;

s43, performing flowing type thermal stirring cleaning on the fragment materials along a snakelike thermal cleaning flow channel, and then, entering a second dehydrator 43 through a fourth spiral feeder 4141 to perform dehydration treatment;

s44, the liquid flowing out of the cooking barrel 411 to the fourth spiral feeder 4141 along with the fragment materials returns to the cooking barrel 411 through the guide pipe 4142, and waste of water resources is reduced.

Example 13

This embodiment is similar to any of embodiments 10 to 12, except that the first rinse tank 51 is constructed as shown in embodiment 1. The first rinsing pool 51 comprises a rinsing tank 511, and a second material stirring mechanism 512, a second discharging mechanism 513 and a second impurity conveying mechanism 514 which are arranged in the rinsing tank 511, wherein a serpentine flow channel 516 is arranged in the rinsing tank 511, and the feeding end and the discharging end of the flow channel 516 are respectively positioned at the first end and the second end of the rinsing tank 511; the second material stirring mechanisms 512 are arranged in the conveying direction of the flow channel 516, and the second discharging mechanism 513 is arranged at the discharging end of the flow channel 516; the second impurity conveying mechanism 514 is positioned below the second material stirring mechanism 512; the first rinsing pool 51 further comprises a third filtering water return mechanism 515, a water outlet of the third dehydrator 52 is communicated with a feed inlet of the third filtering water return mechanism 515, and a water outlet of the third filtering water return mechanism 515 is communicated with the rinsing tank 511.

Specifically, the second material shifting mechanism 512 includes a plurality of second rollers 5121 and a second driving member 5123, the plurality of second rollers 5121 are uniformly distributed along the flow channel 516, the circumferential surface of the second rollers 5121 is uniformly distributed with second blades 5122, and the second driving member 5123 is connected to the second rollers 5121. The second discharging mechanism 513 includes a second discharging groove 5131 connected to the discharging end of the runner 516, and further includes a second chain wheel and chain mechanism 5132 disposed in the second discharging groove 5131, and the second chain wheel and chain mechanism 5132 is connected to a plurality of second rake nail rows 5133. The second impurity conveying mechanism 514 comprises a second screw 5141 which is rotatably connected to the bottom of the rinsing tank 511, and the second screw 5141 extends from the first end to the second end of the rinsing tank 511; the second impurity transfer means 514 further includes a sixth screw loader 5142 communicating with the bottom of the rinsing tank 511. The third filtering water return mechanism 515 is a second circular vibrating screen.

Wherein, step S5 specifically comprises the following steps:

s51, putting the fragment materials subjected to oil stain removal into a rinsing tank 511 filled with clear water from the feeding end of the flow channel 516, stirring and rinsing the fragment materials floating on the water surface through the rolling of a second roller 5121, stirring the fragment materials by a second blade 5122 to flow in a snake shape along the flow channel 516, increasing the rinsing time, and driving the fragment materials to be conveyed towards the direction of a second discharge groove 5131;

s52, detecting the pH value of the liquid in the rinsing tank 511 in real time, and controlling the pH value to be less than or equal to 9; specifically, the liquid in the rinse tank 511 is sampled and pH is detected, and if the detected pH is greater than 9, fresh water is replenished into the rinse tank 511 or the concentration of the detergent is adjusted.

S53, the second chain wheel and chain mechanism 5132 drives the second rake nail row 5133 to move, the second rake nail row 5133 conveys the fragment materials into the second discharge groove 5131, and the fragment materials are discharged to the third dehydrator 52 through the second opening structure to be dehydrated; in the dewatering process, the sewage in the third dewatering machine 52 is filtered by the second circular vibrating screen and then returns to the rinsing tank 511; silt and residue impurities in the fragment materials sink into the bottom of the rinsing tank 511 and are conveyed to a sixth spiral feeder 5142 through a second screw 5141 to be discharged;

s54, the fragment materials dehydrated by the third dehydrator 52 enter a second rinsing pool 53 to be rinsed for the second time; in the process of secondary rinsing, detecting the pH value of the liquid in the second rinsing tank 53 in real time, and controlling the pH value to be less than or equal to 7.5;

and S55, dehydrating the fragment materials subjected to the secondary rinsing by a fourth dehydrator 54.

Example 14

This embodiment is similar to any one of embodiments 10 to 13, except that step S8 in this embodiment specifically includes the following steps:

s81, putting the fragment materials subjected to label blowing into a first mixer 82 for uniform mixing;

s82, putting the uniformly mixed fragment materials into a first color selector 84 for color impurity removal; specifically, step S82 specifically includes the following steps:

s821, dividing ten color selection channels of the first color selector 84 into a first primary selection channel group and a first check channel group; then, putting the fragment materials into a first primary selection channel group for color selection to obtain a first target finished product material group and a first mixed material group; and for the fragment materials which are not selected, putting the fragment materials into the first primary selection channel group again for color selection.

The broken pieces of the selected materials are scattered materials which do not fall into the first transparent finished material collecting position or the first variegated material collecting position; in this embodiment, the first primary selection channel group has eight color selection channels, and the first check channel group has two color selection channels;

s822, transferring the first mixed color material group to a first check channel group for color selection, and then converging the target finished product material obtained in the step into the first target finished product material group; and the variegated materials obtained by the separation in the step are not subjected to color separation, but are additionally collected and processed.

S83, putting the fragment materials subjected to the first color sorting into a second color sorting machine 85 to perform second color impurity removal, and finally obtaining target finished product materials; specifically, step S83 specifically includes the following steps:

s831, dividing ten color sorting channels of the second color sorter 85 into a second primary sorting channel group and a second check channel group; then, the first target finished product material group obtained in the step S822 is put into a second primary selection channel group for color selection to obtain a second target finished product material group and a second variegated color material group; in this embodiment, the second primary selection channel group has eight color selection channels, and the second check channel group has two color selection channels;

s832, transferring the second mixed material group to a second check channel group for color selection, and then converging the obtained target finished material into a second target finished material group to be used as the finally obtained target finished material; in the second target product group obtained in step S832, the variegated color ratio is 2% or less. It should be noted that, when the processing method is applied to the transparent PP cutlery box material, the obtained first target finished product material group is the first transparent finished product material group, and the obtained second target finished product material group is the second transparent finished product material group; when the processing method is applied to other PP or PE materials with colors, the colors of the obtained first target finished material group and the second target finished material group can be selected according to actual application scenes.

In the embodiment, the recovery rate of the target fragment materials can be further improved by setting the primary selection channel group and the check channel group. The first color selector 84 and the second color selector 85 in this embodiment have the same structure as that of embodiment 4. The first color selector 84 comprises a first feeding hoister 842, a first material scattering device 843, a first color selector body 841 and a first checking hoister 844 which are communicated in sequence; the second color sorter 85 comprises a second feeding hoister 852, a second disperser 853, a second color sorter body 851 and a second checking hoister 854 which are communicated in sequence. The feeding end of the second feeding hoister 852 is communicated with the first color sorter body 841, and the discharging end of the second checking hoister 854 is communicated with the feeding end of the first color sorter body 841.

In this embodiment, the discharge end of the first disperser 843 is communicated with the first primary selection channel group of the first color sorter body 841, and the feed end of the first check elevator 844 is communicated with the first check channel group of the first color sorter body 841; the discharge end of the second disperser 853 is communicated with the second primary check channel group of the second sorter body 851, and the feed end of the second check elevator 854 is communicated with the second check channel group of the second sorter body 851. Specifically, in this embodiment, the first feeding elevator 842, the first checking elevator 844, the second feeding elevator 852, and the second checking elevator 854 are all bucket elevators.

When the color sorting operation is performed on the fragment materials, the fragment materials which are sorted are sequentially subjected to the second lifting machine 81 and the first mixing machine 82 to be uniformly mixed, and are conveyed to the buffer bin 83 for buffer storage, then the fragment materials are conveyed to the first material scattering device 843 through the first material feeding lifting machine 842, the fragment materials are conveyed into the first primary sorting channel group through the first material scattering device 843 for primary sorting, and the fragment materials which are classified into the first mixed color material group are conveyed to the first checking channel group through the first checking lifting machine 844 for primary checking. When the materials are conveyed to the second color sorter 85, the fragmented materials sequentially pass through the second feeding hoister 852, the second material disperser 853 and the second primary sorting channel group to complete the secondary primary sorting, and the fragmented materials classified into the second mixed material group sequentially pass through the second checking hoister 854 and the second checking channel group to complete the secondary checking, so that the final target finished product materials are obtained.

Example 15

This embodiment is similar to any one of embodiments 10 to 14, except that the present embodiment further includes step S9: packaging: and uniformly mixing the target finished product materials through a second mixer, and finally packaging.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A waste plastic treatment system is characterized by comprising a magnetic separation device (1), a crushing device (2), a prewashing device (3), a friction boiling device (4), a rinsing device (5), a drying device (6), a sorting device (7) and a color sorting device (8) which are connected in sequence; the rinsing device (5) comprises a first rinsing pool (51), the first rinsing pool (51) comprises a rinsing tank (511) and a second material stirring mechanism (512) and a second material discharging mechanism (513) which are arranged in the rinsing tank (511), a flow channel (516) which is arranged in a snake shape is arranged in the rinsing tank (511), the second material stirring mechanism (512) is arranged along the flow channel (516), and the second material discharging mechanism (513) is arranged at the material discharging end of the flow channel (516).

2. The waste plastic treatment system of claim 1, wherein the second material stirring mechanism (512) comprises a plurality of second rollers (5121) and a second driving member (5123), the plurality of second rollers (5121) are uniformly distributed along the flow channel (516), and second blades (5122) are uniformly distributed on the circumferential surface of the second rollers (5121); the second driving piece (5123) is connected with the second roller (5121), and the adjacent second rollers (5121) on the same axis are connected through a reversing gear box (5124);

the second discharging mechanism (513) comprises a second discharging groove (5131) connected with the discharging end of the flow channel (516), and further comprises a second chain wheel chain mechanism (5132) arranged in the second discharging groove (5131), and a plurality of second rake nail rows (5133) are connected to the second chain wheel chain mechanism (5132).

3. The waste plastic treatment system of claim 1, wherein the first rinsing tank (51) further comprises a second impurity conveying mechanism (514) and a third filtered water returning mechanism (515), and the second impurity conveying mechanism (514) is positioned below the second material stirring mechanism (512); the rinsing device (5) further comprises a third dewatering machine (52) communicated with the second discharging mechanism (513), a water outlet of the third dewatering machine (52) is communicated with a material inlet of a third filtering water return mechanism (515), and a water outlet of the third filtering water return mechanism (515) is communicated with the rinsing tank (511).

4. The waste plastic treatment system as claimed in claim 3, wherein the second impurity conveying mechanism (514) comprises a second screw (5141) movably connected to the bottom of the rinsing tank (511), and further comprises a sixth spiral feeder (5142) communicated with the bottom of the rinsing tank (511);

the third filtering backwater mechanism (515) is a second circular vibrating screen, the water outlet of the third dehydrator (52) is communicated with the feed inlet of the second circular vibrating screen, and the water outlet of the second circular vibrating screen is communicated with the rinsing groove (511).

5. The waste plastic treatment system according to claim 3, characterized in that the rinsing device (5) further comprises a second rinsing tank (53) and a fourth dewatering machine (54) communicated with the second rinsing tank (53), wherein the discharge end of the third dewatering machine (52) is communicated with the feed end of the second rinsing tank (53), and the discharge end of the fourth dewatering machine (54) is communicated with the feed end of the drying device (6).

6. The waste plastic treatment system according to claim 1, characterized in that the prewashing device (3) comprises a separation and sedimentation tank (32), and the feed end of the separation and sedimentation tank (32) is communicated with the discharge end of the crushing device (2); wherein: separation sedimentation tank (32) are including prewashing groove (321) and locate first group material mechanism (322), first discharge mechanism (323) in prewashing groove (321), first group material mechanism (322) are arranged along material direction of delivery and are located be close to open position in prewashing groove (321), first discharge mechanism (323) are located the discharge end of prewashing groove (321), the discharge end and first hydroextractor (34) of prewashing groove (321) are linked together.

7. The waste plastic treatment system according to claim 6, wherein the prewashing device (3) further comprises a first dewatering machine (34) communicated with the separation and sedimentation tank (32), and a discharge port of the first dewatering machine (34) is communicated with a feed end of the friction boiling and washing device (4);

the separation and sedimentation tank (32) further comprises a first impurity conveying mechanism (324) and a first filtering and water returning mechanism (325), wherein the first impurity conveying mechanism (324) is positioned below the first material stirring mechanism (322); the water outlet of the first dehydrator (34) is communicated with the feed inlet of the first filtering water return mechanism (325), and the water outlet of the first filtering water return mechanism (325) is communicated with the prewashing groove (321).

8. The waste plastic treatment system according to claim 7, wherein the prewashing device (3) further comprises a first spiral feeder (31) and a third spiral feeder (33), and the first spiral feeder (31), the separation sedimentation tank (32), the third spiral feeder (33) and the first dehydrator (34) are sequentially connected and communicated; the feeding end of the first spiral feeder (31) is connected and communicated with the discharging end of the crushing device (2).

9. The waste plastic treatment system according to claim 1, characterized in that the friction cooking device (4) comprises a friction cooker (41) and a second dewatering machine (43) in communication with the friction cooker (41); the friction cooking machine (41) comprises a plurality of cooking barrels (411) which are sequentially communicated end to end, a first stirring and conveying mechanism (412) is arranged in each cooking barrel (411), and a heating mechanism (413) is connected to each cooking barrel (411); the discharge end of the friction cooking machine (41) is also communicated with a second filtering water return mechanism (414), and the water outlet of the second filtering water return mechanism (414) is communicated with the cooking barrel (411).

10. The waste plastic treatment system as claimed in claim 9, wherein the second filtering backwater mechanism (414) comprises a fourth spiral feeder (4141) and a conduit (4142), a feed inlet of the fourth spiral feeder (4141) is communicated with a discharge end of the cooking barrel (411), and a discharge outlet of the fourth spiral feeder (4141) is communicated with a feed inlet of the second dehydrator (43); one end of the guide pipe (4142) is communicated with the filtering hole of the fourth spiral feeder (4141), and the other end is communicated with the cooking barrel (411).

11. The waste plastic treatment system according to claim 9, wherein the friction cooking device (4) further comprises a fifth screw feeder (42), and the friction cooking machine (41) is connected and communicated with the second dewatering machine (43) through the fifth screw feeder (42); the discharge port of the second dewatering machine (43) is communicated with the feed end of the rinsing device (5).

12. The waste plastic treatment system according to claim 1, wherein the color sorting device (8) comprises a second lifting machine (81), a first mixing machine (82), a buffer bin (83), a first color sorting machine (84) and a second color sorting machine (85) which are connected in sequence and communicated with each other, and a feeding hole of the second lifting machine (81) is communicated with a discharging end of the sorting device (7).

13. The waste plastic treatment system according to any one of claims 1-12, characterized in that it further comprises a packing device (9), the feeding end of the packing device (9) being in communication with the discharging end of the color sorting device (8).

14. A waste plastic treatment method is characterized by comprising the following steps:

s3, prewashing: pre-washing the fragment materials by a separation and sedimentation tank (32) to remove silt and residues, and then dehydrating by a first dehydrator (34);

s4, oil stain cleaning: adding a detergent and an alkali solution into a friction cooking machine (41), carrying out hot alkali cleaning on the pre-cleaned fragment material through the friction cooking machine (41), and then carrying out dehydration treatment through a second dehydrator (43) to obtain the deoiled fragment material;

s5, rinsing: the deoiled fragment materials are rinsed and dehydrated twice through a first rinsing tank (51), a third dehydrator (52), a second rinsing tank (53) and a fourth dehydrator (54) in sequence, so that the residual of a detergent is reduced;

15. The waste plastic treatment method according to claim 14, wherein the step S3 specifically comprises the steps of:

s31, putting the fragment materials into a prewashing tank (321) filled with clear water, and stirring the fragment materials floating on the water surface through a first stirring mechanism (322) to drive the fragment materials to move towards the first discharging mechanism (323);

s32, removing the broken pieces in the prewashing groove (321) out of the prewashing groove (321) through a first discharging mechanism (323), and performing dehydration treatment through a first dehydrator (34);

s33, filtering the sewage in the first dehydrator (34) through a first filtering and water returning mechanism (325) and then returning the sewage into the prewashing tank (321);

s34, settling silt and residue impurities in the fragment materials into the bottom of the prewashing tank (321) and conveying and discharging the silt and the residue impurities through a first impurity conveying mechanism (324).

16. The waste plastic treatment method according to claim 14, wherein the step S4 specifically comprises the steps of:

s41, adding an alkali solution and a detergent into the cooking barrel (411), and starting a first stirring and conveying mechanism (412) and a heating mechanism (413) to stir and preheat liquid in the barrel; wherein, the alkali concentration of the alkali solution is 2-5%;

s42, putting the pre-washed fragment materials into the cooking barrel (411) for hot stirring and cleaning; wherein the heating temperature of the heating mechanism (413) is 40-80 ℃;

s43, the fragment materials sequentially pass through each cooking barrel (411) to be subjected to multiple times of thermal cleaning, and then are subjected to dehydration treatment through a second dehydrator (43);

s44, liquid flowing out of the cooking barrel (411) is filtered by a second filtering and water returning mechanism (414) and then returns to the cooking barrel (411).

17. The waste plastic treatment method according to claim 14, wherein the step S5 specifically comprises the steps of:

s51, putting the fragment materials subjected to oil stain removal into a rinsing tank (511) filled with clear water, and stirring the fragment materials floating on the water surface through a second stirring mechanism (512) to drive the fragment materials to move along a runner (516);

s52, detecting the pH value of the liquid in the rinsing tank (511) in real time, and controlling the pH value to be less than or equal to 9;

s53, moving the fragment materials to a second discharging mechanism (513) and discharging, and then performing dehydration treatment through a third dehydrator (52); in the dehydration process, the sewage in the third dehydrator (52) is filtered by a third filtering and water returning mechanism (515) and then returns to the rinsing tank (511); silt and residue impurities in the fragment materials sink into the bottom of the rinsing tank (511) and are conveyed and discharged through a second impurity conveying mechanism (514);

s54, the fragment materials dehydrated by the third dehydrator (52) enter a second rinsing pool (53) for secondary rinsing; in the process of secondary rinsing, detecting the pH value of the liquid in the second rinsing pool (53) in real time, and controlling the pH value to be less than or equal to 7.5;

and S55, dehydrating the fragment materials subjected to the secondary rinsing through a fourth dehydrator (54).

18. The waste plastic treatment method according to claim 14, wherein the step S8 specifically comprises the steps of:

s81, putting the fragment materials subjected to label blowing into a first mixer (82) for uniform mixing;

s82, feeding the uniformly mixed fragment materials into a first color selector (84) for color impurity removal;

and S83, putting the fragment material subjected to the first color selection into a second color selector (85) for second color impurity removal, and finally obtaining a target finished product material.

19. The waste plastic treatment method of claim 18, wherein the step S82 specifically comprises the steps of:

s821, feeding the fragment materials into a partial color selection channel of a first color selector (84) for color selection to obtain a first target finished material group and a first mixed material group;

s822, transferring the first mixed material group to the color sorting channel of the rest part for color sorting, and then gathering the obtained target finished material into the first target finished material group;

the step S83 specifically includes the following steps:

s831, putting the first target finished product material group obtained in the step S822 into a part of color selection channels of a second color selector (85) for color selection to obtain a second target finished product material group and a second mixed color material group;

s832, transferring the second mixed material group to the color sorting channel of the rest part for color sorting, and then converging the obtained target finished material into the second target finished material group; in the second target product group obtained in step S832, the variegated color ratio is 2% or less.

20. The waste plastic treatment method as set forth in any one of claims 14 to 19, further comprising the step S9 of: packaging: and uniformly mixing the target finished product materials, and finally packaging.