JP2009208331A - Sorting system for waste plastics and sorting method of waste plastics - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sorting system for waste plastics, a system can improve sorting efficiency and accuracy, reduce a load of workers, and curtail labor cost, and also to provide a sorting method of waste plastics. <P>SOLUTION: This is a system 100 for sorting waste plastics from refuse 1 containing recyclable plastic wastes. The system is characterized in that it includes: a bag breaking apparatus 20 for sorting refuse 1 into difficultly deformable objects comprising hard matters and easily deformable objects comprising soft matters; a rotary sieve 30 for difficultly deformable objects, by which a residue is removed from the difficultly deformable objects sorted by the bag breaking apparatus 20 or a conveyor/sorter 40 for difficultly deformable objects; and an optical sorter 50 for difficultly deformable objects, by which waste plastics are sorted from the difficultly deformable objects with the residue removed by the rotary sieve 30 or the conveyor/sorter 40. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a waste plastic sorting system for sorting waste plastic for recycling from waste containing plastic resource waste, and a waste plastic sorting method.

  In recent years, from the viewpoint of resource saving and with the enforcement of the Container Recycling Law, a number of technologies related to recycling of waste plastics have been proposed. Waste plastic collected for recycling often contains garbage bags, plastic bottles, trays, etc., and foreign substances such as paper, metal, and sand are mixed. Here, when the waste plastic contained in the waste is used to recycle it into a new product, it is classified into a plastic or a flake form after being classified into each plastic material. For this reason, in the recycling technology, it is necessary to remove foreign substances from waste plastics and to sort them by material, and many proposals for such sorting technologies have been made.

  For example, Patent Document 1 discloses a waste plastic recycling method for separating waste plastics collected as domestic wastes, industrial wastes, and the like and processing them easily for reuse. In this treatment method, various types of mixed plastics collected as domestic waste and industrial waste are crushed by a crusher, etc. The piece is removed and supplied to the hand sorting process.

  In the manual sorting process, waste plastic placed on the conveyor is manually selected and transferred to a bunker. This waste plastic that is transferred is a plastic material with a clear material, such as garbage bags, plastic bottles, etc. The miscellaneous waste plastics, such as trays, whose materials are unknown, go through another processing path other than manual sorting. Note that the paper / foreign matter is carried out for disposal as an uncollected item.

This prior art relies on high manual identification accuracy, and sorts various plastic materials of clear material and non-recovered products from miscellaneous waste. In addition, things other than manual sorting are supplied to an automatic sorting facility, where metal is first removed by an eddy current sorting process, and then a container system (hardly deformable (heavy) Material)) and soft packaging material (easy deformable material (light material)).
JP 2004-255572 A (paragraphs 0021 to 0023, FIGS. 1 and 2)

However, the conventional recycling process technique has the following problems.
In conventional waste plastic sorting, waste is a mixture of materials of various types and shapes, so there are many types of materials to be sorted by hand. The work of separating the materials for each plastic material is complicated. For this reason, there is a problem that the burden on the worker is large, a large number of hand sorting workers are required, and labor costs are high. And since there are many operations by manual sorting, there is also a problem that sorting efficiency and sorting accuracy are poor.

  In addition, when performing eddy current sorting and wind sorting with automatic sorting equipment, if sheet-like materials such as garbage bags and films that could not be manually sorted are mixed into the automatic sorting equipment, this sheet-like material is sorted. Covering the product or underlaying the selected product may interfere with sorting in the eddy current sorting process and the wind sorting process, and may deteriorate sorting efficiency and sorting accuracy.

  The present invention has been made in view of the above circumstances, and the purpose thereof is waste plastic that can improve sorting efficiency and sorting accuracy, reduce the burden on workers, and reduce labor costs. And a method for sorting waste plastic.

  As described above, in the conventional recycling processing technology, although a device such as a crusher or a drum screen is used, in order to maintain high identification accuracy, the work mainly involves a manual sorting process. Conventionally, it has not been thought that the sorting efficiency and the sorting accuracy can be improved even if the recycling process is performed by combining various devices. However, as a result of intensive research, the inventors have used a bag-breaking device, a rotary sieve device, a conveyance sorting device, an optical sorting device, etc. in comparison with the conventional recycling technology, It has been found that sorting efficiency and sorting accuracy can be improved. As a result, while maintaining high sorting efficiency and sorting accuracy that could not be achieved with the conventional technology, it is possible to reduce the burden on workers and reduce labor costs by reducing the manual sorting process. The inventors have invented a plastic sorting system and a waste plastic sorting method.

  The waste plastic sorting system according to claim 1 is a waste plastic sorting system that sorts waste plastic from waste containing plastic resource waste, and includes a bag breaking device and a rotating sieve device for hardly deformable materials, or It is provided with a transporting and sorting device for difficult-to-transform objects and an optical sorting device for difficult-to-transform materials.

  According to such a waste plastic sorting system, the bag rotor is rotated by rotating a hook rotor provided with a hook, and an easily deformable material made of soft material is entangled with the hook, thereby disposing of plastic resource waste. A thing is classified into the hard deformation thing which consists of a hard thing, and the easy deformation thing which consists of a soft thing. In addition, the difficult-to-deformation rotating sieve device allows the difficult-to-deformation product sorted by the bag breaking device to be put into the rotating sieve and rotated, and the residue is removed by sieving the residue from the mesh of the rotating sieve. Alternatively, the difficult-to-deformation material transfer and sorting device conveys difficult-to-deformation materials separated by the bag breaking device on a conveyance path formed by providing a plurality of rollers at a predetermined interval, and the residue drops from the gaps in the roller interval. To remove the residue. The waste plastic is separated by the difference in the absorbance of the wavelength of the hard-deformable product from which the residue is removed by the hard-form-deformable rotary sieve device or the hard-deformable transport sorting device. Sorted and waste plastic is sorted by material.

  The waste plastic sorting system according to claim 2 is the waste plastic sorting system according to claim 1, wherein the easily deformable material sorted by the bag breaking device is put into a rotating sieve and rotated, and the rotating sieve sieve is used. The present invention is characterized in that it is equipped with an easily deformable rotating sieve device that removes the residue by sieving from the eyes and discharges it as waste plastic of the easily deformable material.

  The waste plastic sorting system according to claim 3 is the waste plastic sorting system according to claim 1, wherein the easily deformable material separated by the bag breaking device is formed by providing a plurality of rollers at predetermined intervals. An easily deformable material transport and sorting device is provided that transports along a transport path, drops residues from the gaps between the rollers, and discharges the residue as waste plastic of easily deformable materials.

  According to waste plastic sorting systems such as these, residues mixed in easily deformable materials separated by the bag breaking device are removed and used for recycling, such as plastic sheets, films, bags, etc. ( Hereinafter, the quality (purity) of easily deformable products (referred to as films and bags) is improved.

  The waste plastic sorting system according to claim 4 is the waste plastic sorting system according to any one of claims 1 to 3, wherein the waste plastic is sorted by the optically sorting device for hard-to-deform objects. According to the present invention, there is provided an optical sorting device for residue that sorts waste plastic contained in the residue according to the difference in the absorbance of the wavelength of the residue.

  According to such a waste plastic sorting system, by supplying the sorted residue to the optical sorting device for the residue, the waste plastic contained in the residue is sorted, and the recovery efficiency is improved. The amount of residue resulting from the residue is reduced. In addition, waste plastics are sorted by material.

  The waste plastic sorting method according to claim 5 is a waste plastic sorting method for sorting waste plastic from waste containing plastic resource waste, and includes a sorting step, a residue removing step, a waste plastic sorting step, It is characterized by including.

  According to such a waste plastic sorting method, a waste containing plastic resources waste is produced by rotating a hook rotor provided with a hook and entangled an easily deformable material made of a soft material in the separation step. However, it is classified into a hard deformation material made of a hard material and an easy deformation material made of a soft material. In addition, the residue removal process removes the residue by putting the difficultly deformed material separated in the separation process into a rotating sieve and rotates it, and sifts the residue from the mesh of the rotating sieve, or separates it in the separating process. The difficultly deformed material is transported on a transport path formed by providing a plurality of rollers at a predetermined interval, and the residue is removed by dropping the residue from a gap in the roller interval. In the waste plastic sorting process, the waste plastic is sorted according to the difference in the absorbance of the wavelength of the difficultly deformed product from which the residue has been removed in the residue removing process, and the waste plastic is sorted for each material.

  The waste plastic sorting method according to claim 6 is the waste plastic sorting method according to claim 5, wherein, in the residue removal step, in addition to removing residues from difficult-to-deform materials, the waste plastic separation method The deformed product is put into a rotating sieve and rotated, and the residue is removed by sieving the residue from the mesh of the rotating sieve, and discharged as waste plastic of an easily deformable product.

  The waste plastic sorting method according to claim 7 is the waste plastic sorting method according to claim 5, wherein, in the residue removal step, in addition to removing residues from difficult-to-deform materials, the easy separation separated in the separation step. The deformed product is transported on a transport path formed by providing a plurality of rollers at a predetermined interval, and a residue is dropped from a gap in the interval between the rollers, and is discharged as easily deformable waste plastic.

  According to the waste plastic sorting methods such as these, the residues mixed in the easily deformable materials separated in the separation process are removed, and the quality (purity) of easily deformable materials such as films and bags used for recycling. Will improve.

  The waste plastic sorting method according to claim 8 is the waste plastic sorting method according to any one of claims 5 to 7, wherein in the waste plastic sorting step, the waste plastic is sorted from hardly deformed material. In addition, the present invention is characterized in that the waste plastic contained in the residue is sorted according to the difference in the absorbance of the wavelength of the residue after sorting the waste plastic.

  According to such a waste plastic sorting method, the waste plastic contained in the residue is sorted from the residue after sorting the waste plastic from the difficult-to-deform material, and the recovery efficiency is improved. The amount of residue produced is reduced. In addition, waste plastics are sorted by material.

  According to the waste plastic sorting system according to the present invention, it is possible to reduce the burden of waste plastic sorting work, so it is possible to reduce the labor of workers performing manual sorting work and to reduce labor costs. . In addition, the sorting operation of the waste plastic can be performed efficiently and the sorting accuracy can be improved. Furthermore, the waste plastics can be sorted efficiently for each material. And the foreign material mixed in waste plastic can be reduced, and the quality (purity) of the waste plastic utilized for recycling can be improved. Moreover, waste plastic can be recovered from what has been disposed of as a residue until now, and the amount of residue can be reduced.

  According to the waste plastic sorting method according to the present invention, the burden of waste plastic sorting work can be reduced, the labor of workers performing manual sorting work can be reduced, and labor costs can be reduced. In addition, waste plastic can be sorted efficiently and with high accuracy. Furthermore, the efficiency of separating waste plastics by material is improved. And the foreign material mixed in waste plastic can be reduced, and the quality (purity) of the waste plastic utilized for recycling can be improved. Moreover, waste plastic can be recovered from what has been disposed of as a residue until now, and the amount of residue can be reduced.

Hereinafter, a waste plastic sorting system and a waste plastic sorting method according to the present invention will be described in detail with reference to the drawings.
In the drawings to be referred to, FIG. 1 is a schematic diagram showing a configuration of a waste plastic sorting system, FIG. 2 is a schematic diagram showing an outline of a crushing device, and FIG. 3 is a schematic diagram showing an outline of a bag breaking device. 4 is a schematic diagram showing an outline of a rotary sieve device for hardly deformable materials or a rotary sieve device for easily deformable materials, and FIG. 5 is an outline of a transport and sorting device for hardly deformable materials or a transport sorter for easily deformable materials. FIG. 6 is a schematic diagram showing an outline of an optical sorting device for hardly deformable materials or an optical sorting device for residues, and FIG. 7 is a flowchart showing a method for sorting waste plastic.

First, a waste plastic sorting system will be described.
The waste plastic sorting system according to the present invention sorts waste plastic from waste including plastic resource waste.
In addition, in the waste plastic referred to in the present invention, there are various types other than PE (polyethylene), PP (polypropylene), PS (polystyrene), PVC (polyvinyl chloride), PET (polyethylene terephthalate), EPS (foamed polystyrene), and the like. Plastic is included.

≪Waste plastic sorting system≫
As shown in FIG. 1, a waste plastic sorting system (hereinafter also referred to as a sorting system as appropriate) 100 includes a bag-breaking device 20, a difficult-to-deform object rotary sieve device 30, and a to-be-transformed material transport and sorting device 40. And an optical sorting device 50 for difficult-to-deform objects. Further, the crushing device 10, the easily deformable material rotary sieve device 60, and the easily deformable material conveyance sorting device 70 may be provided, and the residue optical device is further provided downstream of the hardly deformable material optical sorting device 50. A type selection device 80 may be provided.
Each configuration will be described below.

<Crushing device>
The crushing device 10 is a device that crushes the waste 1 such as a bale product or a rose product. The crushing device 10 may be provided as necessary, and the waste 1 may be supplied to the bag breaking device 20 without using the crushing device 10.
It does not specifically limit as the crushing apparatus 10 to be used, For example, the crushing apparatus 10 which is demonstrated below can be used.

As shown in FIG. 2, the crushing device 10 mainly includes an input port 11, a screw auger 12, a discharge port 13, and a drive speed reducer 14.
In the crushing by the crushing apparatus 10, first, waste 1 (see FIG. 1) including plastic resource waste is input from the input port 11. The thrown-in waste 1 is crushed by the rotating screw auger 12 and then discharged from the discharge port 13. And this discharged | emitted waste 1 is supplied to the bag breaking apparatus 20 via the conveyor 5a (refer FIG. 1). The rotational speed of the screw auger 12 is adjusted by the drive speed reducer 14.

  By mechanizing the crushing of the waste 1 by the crushing device 10, it is possible to quantitatively supply the waste 1 to the bag breaking device 20 while reducing the labor of the worker. Moreover, the performance of the bag breaking apparatus 20 can be fully exhibited.

<Bag breaker>
As shown in FIGS. 1 and 3, the bag breaking device 20 is provided downstream of the crushing device 10 when the crushing device 10 is provided, and the hook rotor 26 provided with the hook 25 is rotated to rotate the hook. 25. An apparatus for separating waste 1 including plastic resource waste into hard-deformable material 2 made of hard material and easy-deformable material 3 made of soft material by entangling easy-deformed material 3 made of soft material with 25 It is.

Here, the difficult-to-deform product 2 refers to a material such as a PET bottle, a can, a bottle, a plastic tray, a battery, or the like that is made of a hard material that is generally discarded as garbage.
The easily deformable material 3 refers to a material made of a soft material that is generally discarded as garbage, such as a sheet, a film, a bag, a string, a rope, a rubber tube, and a thin wire.

  The bag breaking device 20 to be used is not particularly limited, and for example, a bag breaking device 20 as described below can be used.

  As shown in FIG. 3, the bag breaking device 20 includes a loading port 21, a bag breaking rotor 24 having a fixed blade 22 and a shaft blade 23, a hook rotor 26 having a hook 25, and a hardly deformable material discharge port 27. And an easily deformable material discharge port 28.

In the separation by the bag-breaking device 20, first, the waste 1 including plastic resource waste is input from the input port 21. When the thrown-in waste 1 is contained in a garbage bag, the garbage bag is broken by the fixed blade 22 and the shaft blade 23 by the rotation of the bag breaking rotor 24.
Then, the hardly deformable object 2 in the garbage bag is discharged from the hardly deformable object discharge port 27. Moreover, when not accommodated in the garbage bag, the hardly deformable object 2 is discharged from the hardly deformable object discharge port 27 as it is. The discharged hardly deformed object 2 is supplied to the hardly deformable object rotating sieve device 30 or the hardly deformable object conveying and sorting device 40 via the conveyor 5b (see FIG. 1).

  On the other hand, the easily deformable material 3 in the garbage bag, the easily deformable material 3 included in the waste 1 not accommodated in the garbage bag, and the broken bag material (easy deformable material 3) are produced by the rotation of the hook rotor 26. The easily deformable material 3 is entangled with the hook 25 and is discharged from the easily deformable material discharge port 28. The easily deformable product 3 that has been discharged is supplied to a recycling process in which plastics are recycled after removing foreign substances or separating them according to material, if necessary. Or it supplies to the rotary sieve apparatus 60 for easily deformable objects, or the conveyance sorter 70 for easily deformable objects via the conveyor 5c (refer FIG. 1).

  By the bag breaking device 20, the bag breaking operation of the bags included in the waste 1 and the separation operation for automatically separating the easily deformable material 3 that hinders the sorting of the optically sorting device 50 for difficult deformation material are performed. Thus, the work that has been performed only by hand sorting can be greatly reduced, and the labor cost can be greatly reduced. Further, it is possible to improve the sorting accuracy of the optically sorting device 50 for difficult-to-deform objects, and to improve the quality (purity) of the collected waste plastic.

<Rotating sieve device for difficult deformation>
As shown in FIGS. 1 and 4, the rotary sieve device 30 for difficult deformation is provided downstream of the bag breaking device 20, and the hard deformation 2 sorted by the bag breaking device 20 is put into the rotary sieve 32. It is an apparatus that removes the residue 4 by rotating and removing the residue 4 from the sieve mesh 34 of the rotary sieve 32.
Here, the residue 4 refers to a small-diameter substance that is a foreign substance that cannot be used for plastic recycling, such as earth and sand, broken glass, a crown, and a small-diameter metal object.

  There is no particular limitation on the rotary sieve device 30 for difficult-to-deform products to be used, and a rotary sieve device (Trommel) may be used. For example, it is possible to use a rotating sieve device 30 for difficult deformation as described below.

As shown in FIG. 4, the difficult-to-deform product rotary sieve device 30 mainly includes an inlet 31, a rotary sieve 32, a sieve mesh 34, and an outlet 35.
In the removal of the residue 4 using the rotary sieve device 30 for difficult deformation, first, the hard deformation 2 (see FIG. 3) separated by the bag breaking device 20 is charged from the inlet 31. The hard-to-deformation product 2 that has been put in is rotated in the rotary screen 32 by the rotation of the rotary sieve 32, and the residue 4 contained in the hard-to-deformation product 2 is removed from the mesh 34 and discharged. Then, the hardly deformable object 2 from which the residue 4 has been removed is discharged from the discharge port 35, and the discharged difficultly deformable object 2 is supplied to the hardly deformable object optical sorting device 50. The residue 4 may collect the remaining waste plastic by manual selection.

  It should be noted that the hard-to-deformate 2 that has been discharged is transported by a conveyor 5d, which is a hand-sorting unit, as necessary, before being supplied to the optical sorting device 50 for difficult-to-deformation, and by hand sorting, You may remove the unsuitable thing (for example, paper, a bottle, a can, a string, a rope, etc.) which is a foreign substance which cannot be used for recycling. In addition, coarse waste plastic that is not suitable for sorting by the optically sorting device 50 for difficult-to-deform objects may be sorted by manual sorting while being conveyed by the conveyor 5d. Furthermore, a vibration conveyor 5A for allowing the hard-to-deformation object 2 to be introduced quantitatively and dispersed (so as not to overlap) may be provided upstream of the hardly-deformable optical sorting device 50.

  By removing the residue 4 from the difficultly deformable material 2 from which the easily deformable material 3 has been removed by the rotary sieve device 30 for difficultly deformable materials, the work that has been performed only by hand sorting can be greatly reduced. As a result, labor costs can be significantly reduced. Further, it is possible to improve the sorting accuracy of the optically sorting device 50 for difficult-to-deform objects, and to improve the quality (purity) of the collected waste plastic.

<Conveyance and sorting device for difficult-to-transform objects>
As shown in FIGS. 1 and 5, the difficult-deformable material transfer and sorting device 40 is provided downstream of the bag breaking device 20, and the hard deformed material 2 sorted by the bag breaking device 20 is provided with a plurality of rollers 42. It is an apparatus that transports the hardly deformable object 2 while removing the residue 4 by transporting it on the transport path formed by providing the clearance 4 and dropping the residue 4 from the gap in the interval of the rollers 42.

  There are no particular limitations on the difficult-to-transform material sorting device 40 to be used, and a transportation sorting device (vibrating sieve) may be used. For example, it is possible to use a difficult-to-deform material conveyance sorting apparatus 40 as described below.

As shown in FIG. 5, the difficult-to-deform material conveyance sorting apparatus 40 mainly includes a loading port 41, a roller (polygonal disk) 42, and a discharge port 43.
In the removal of the residue 4 by the difficult-deformable material transfer and sorting device 40, first, the difficult-to-deformable material 2 (see FIG. 3) sorted by the bag breaking device 20 is charged from the inlet 41. The introduced difficult-to-transform 2 is conveyed in the direction of the discharge port 43 while bouncing on the rotating roller (polygonal disk) 42. And by this bound, the residue 4 contained in the hardly deformable material 2 is separated and discharged from below the hardly deformable material conveying and sorting device 40. Then, the hardly deformable object 2 from which the residue 4 has been removed is discharged from the discharge port 43, and the discharged difficultly deformable object 2 is supplied to the hardly deformable object optical sorting device 50. The residue 4 may collect the remaining waste plastic by manual selection.

  The discharged difficult-to-deformation product 2 is conveyed by a conveyor 5d, which is a hand-sorting unit, as necessary, before being supplied to the optically sorting device 50 for difficult-to-deformation products. You may remove the unsuitable thing (for example, paper, a bottle, a can, a string, a rope, etc.) which is a foreign substance which cannot be used for recycling. In addition, coarse waste plastic that is not suitable for sorting by the optically sorting device 50 for difficult-to-deform objects may be sorted by manual sorting while being conveyed by the conveyor 5d. Furthermore, a vibration conveyor 5A for allowing the hard-to-deformation object 2 to be introduced quantitatively and dispersed (so as not to overlap) may be provided upstream of the hardly-deformable optical sorting device 50.

  By removing the residue 4 from the difficultly deformable material 2 from which the easily deformable material 3 has been removed by the transporting and sorting device 40 for difficultly deformable materials, it is possible to greatly reduce the work that has been performed only by hand sorting so far. As a result, labor costs can be significantly reduced. Further, it is possible to improve the sorting accuracy of the optically sorting device 50 for difficult-to-deform objects, and to improve the quality (purity) of the collected waste plastic.

<Optical sorter for difficult deformation>
As shown in FIGS. 1 and 6, the optically sorting device 50 for hardly deformable objects is provided downstream of the rotary sieve device 30 for hardly deformable objects or the conveyance sorting device 40 for hardly deformable objects. This is a device that sorts waste plastic according to the difference in the absorbance of the wavelength of the hardly deformable material 2 from which the residue 4 has been removed by the rotary sieve device 30 or the hardly deformable material conveyance sorting device 40.

  The optically sorting device 50 for difficult-to-deform objects to be used is not particularly limited as long as material sorting can be performed, and an optical sorting device may be used. For example, the optical sorting device for difficult-to-deform objects that performs material sorting using the property that the wavelength absorption varies depending on the material of the treated material when the treated material is irradiated with near infrared rays, as described below. 50 can be used.

  As shown in FIG. 6, the optically sorting device 50 for difficult-to-transform objects includes an insertion port 51, a conveyor 52, a light source lamp 53, a detector 54, a control panel 55, an air tank 56, and a sorted product conveyor. 57 and a residue conveyor 58 are mainly provided.

  In sorting waste plastic by the optical sorting device 50 for difficult deformation, first, the hard deformation 2 discharged by the rotation deforming device 30 for difficult deformation or the conveyance sorting device 40 for difficult deformation is supplied to the inlet. 51, and placed on the conveyor 52. Next, near infrared rays emitted from the light source lamp 53 are irradiated on the hardly deformable object 2 on the transport conveyor 52, and data based on the wavelength of light reflected from the hardly deformable object 2 is input to the detector 54. At that time, the light source lamp 53 scans in the width direction of the transport conveyor 52 at high speed, and detects the sorted product 6 (hardly deformable material 2) that is waste plastic diffused on the transport conveyor 52.

The data input to the detector 54 is processed by the control panel 55 to detect the position of the waste plastic (sorted product 6) that is the material to be sorted. Then, by this position detection information, the waste plastic (sorted product 6) is identified, the air tank 56 is operated, and the air is discharged from the air nozzle attached to the tip of the conveyor 52, so that the waste plastic ( The sorted product 6) is placed on the sorted product conveyor 57. Further, the residue 7 (hardly deformable material 2) other than the sorted product 6 is placed on the residue conveyor 58.
The residue 7 is a mixture of waste plastics of a plurality of materials (for example, PE, PP, PS, PVC, PET, EPS, etc.) other than the sorted product 6 and foreign matters.

In addition, the waste plastic can be sorted by material (for example, PE, PP, PS, PVC, PET, EPS, etc.) by the optically sorting device 50 for difficult deformation.
In order to sort by material, for example, a sorting object (waste plastic material) which is the sorting product 6 is set on the control panel 55, and set when the detector 54 detects the material passing through the transport conveyor 52. If there is a material that has been selected, a command is issued from the control panel 55 to the air tank 56, and the sorting object (sorted product 6) is sent to the sorted product conveyor 57 by air and sorted. At this time, a plurality of air tanks 56 and sorted product conveyors 57 are prepared, and the control panel 55 sets the air tanks 56 for each detected material. You may make it fly.
In the optically sorting device 50 for difficult-to-deform objects, plastic bottles, plastic trays, and other plastics can be sorted by material.

  The waste plastic separated in this way is conveyed to a recycling process via conveyors 5e and 5f (see FIG. 1), and becomes plastic for recycling. On the other hand, the residue 7 is discarded as the residue 4. Alternatively, as will be described later, it may be supplied to the optical sorting device 80 for residues.

  In addition, the sorted waste plastic (sorted product 6) and the residue 7 are made into a manual sorting unit as needed before being transported to the recycling process or before being supplied to the residue optical sorting device 80. In addition, while being conveyed by the conveyors 5e and 5g (see FIG. 1), unsuitable substances that are foreign matters that cannot be used for plastic recycling may be removed by hand sorting, or waste plastics may be sorted by material.

  Here, using the conveyor 5g as a manual sorting unit, the residue 7 is separated by manual sorting while being conveyed by the conveyor 5g, and the waste plastic that has been recovered by the optically sorting device 50 for difficult-to-transform is returned to the conveyor 5e. The recovery rate of the entire equipment may be improved (arrow (B) in FIG. 1).

  With the optical sorting device 50 for difficult-to-deform objects, a large amount and continuous processing can be performed in sorting waste plastic. Further, compared with manual sorting, the work that has been performed only by manual sorting can be greatly reduced, and labor costs can be greatly reduced. Furthermore, the quality (purity) of the collected waste plastic can be improved. And waste plastic can also be classified for every material.

In the sorting system according to the present invention, an optical sorting device 80 for residues may be further provided.
<Optical sorter for residue>
As shown in FIGS. 1 and 6, the optical sorting device 80 for residues is provided downstream of the optical sorting device 50 for hardly deformable materials, and the waste plastic is sorted by the optical sorting device 50 for hardly deformable materials. This is a device for sorting out waste plastic contained in the residue 7 based on the difference in the absorbance of the wavelength of the residue 7.

  Thereby, the waste plastic (sorted product 6) remaining in the residue 7 can be collected. Therefore, the recovery efficiency is improved, and the amount of the residue 4 generated from the residue 7 can be reduced. At this time, as described above, the waste plastic in the residue 7 can also be sorted by material (PS, PET, etc.). The configuration and operation of the optical sorting device 80 for residues are the same as those of the optical sorting device 50 for hardly deformable materials, and thus the description thereof is omitted here.

The residue optical sorting device 80 enables large-scale and continuous processing in the separation of waste plastic. Further, compared with manual sorting, the work that has been performed only by manual sorting can be greatly reduced, and labor costs can be greatly reduced. Furthermore, the quality (purity) of the collected waste plastic can be improved. And waste plastic can also be classified for every material.
An oscillating conveyor 5 </ b> B may be provided upstream of the residue optical sorting device 80 for allowing the residue 7 to be distributed quantitatively and dispersed (so as not to overlap).

  In this way, the waste plastic (sorted product 6) and the residue 7 sorted by the residue optical sorting device 80 are conveyed by the conveyors 5h and 5i, which are hand sorting units, as necessary. By hand sorting, unsuitable foreign substances that cannot be used for plastic recycling may be removed, or waste plastic may be sorted by material (PS and PET in FIG. 1). Although not shown, the same may be applied to the waste plastic (sorted product 6) and the residue 7 sorted by the optically sorting device 50 for hardly deformable material.

In the sorting system according to the present invention, a rotary sieve device 60 for easily deformable material or a transport sorting device 70 for easily deformable material may be further provided.
<Rotating sieve device for easily deformable material>
As shown in FIGS. 1 and 4, the easily deformable rotary sieve device 60 is provided downstream of the bag breaking device 20, and the easy deformable material 3 sorted by the bag breaking device 20 is put into the rotary sieve 32. It is a device that rotates and removes the residue 4 by sieving the residue 4 from the mesh 34 of the rotary sieve 32 and discharging it as waste plastic of the easily deformable product 3.

  It does not specifically limit as the rotary sieve apparatus 60 for easily deformable materials to be used, A rotary sieve apparatus (Trommel) should just be used. For example, the above-described rotating sieve device 60 for the easily deformable object is obtained by making the mesh 34 of the rotating sieve 32 of the rotating sieve device 30 for the hardly deformable material larger than the sieve 34 of the rotating sieve device 30 for the hardly deformable material described above. Can be used as

  The configuration and operation of the easily deformable rotating sieve device 60 are the same as the difficultly deformable rotating sieve device 30 except that the mesh 34 is larger than the hardly deformable rotating sieve device 30. The description is omitted here.

<Easily deformable material transfer and sorting device>
As shown in FIGS. 1 and 5, the easily-deformable material conveyance sorting device 70 is provided downstream of the bag breaking device 20, and the easily deformable material 3 sorted by the bag breaking device 20 is given a plurality of rollers 42. It is an apparatus that removes the residue 4 by dropping the residue 4 from the gap in the interval of the rollers 42 and discharging it as waste plastic of the easily deformable material 3.

  There are no particular limitations on the easily-deformable material transfer sorting device 70 used, and a transfer sorting device (vibrating sieve) may be used. For example, an easily deformable material transport and sorting device 70 having a larger distance between the rollers 42 of the hardly deformable material transport and sorting device 40 than the interval of the rollers 42 of the hardly deformable material transport and sorting device 40 is used. can do.

  The configuration and operation of the easily-deformable material transport and sorter 70 are the same as those of the hardly-deformable material transport and sorter 40 except that the interval between the rollers 42 is larger than that of the hardly deformable material transport and sorter 40. Therefore, the description is omitted here.

  As described above, in the bag breaking device 20, the easily deformable material 3 is discharged from the easily deformable material discharge port 28, and this easily deformable material rotating sieve device 60 or the easily deformable material conveyance sorting device 70 Residues 4 such as earth and sand, glass fragments, crowns, and small-diameter metal objects mixed in the discharged easily deformable material 3 are removed. Here, the residue 4 includes small-diameter difficult-to-deform products 2 such as fluff-like films and bags that are waste plastics.

The easily deformable material 3 discharged from the easily deformable material rotating sieve device 60 or the easily deformable material conveyance sorting device 70 is transported to the regeneration process via the conveyor 5f (arrow (C) in FIG. )) Alternatively, after being supplied to the residue optical sorting device 80 via the conveyor 5g, it is transported to the recycling process and becomes plastic for recycling (arrow (D) in FIG. 1).
On the other hand, the residue 4 is discarded as it is, or is supplied to the hardly deformable material rotary sieve device 30 or the hardly deformable material conveying and sorting device 40 via the conveyor 5b, and remains in the residue 4. The deformation 2 may be separated (arrow (A) in FIG. 1).

  The discharged easily deformable product 3 is manually sorted while being conveyed by a conveyor 5j as a manual sorting unit, if necessary, before being supplied to the optical sorting device 80 for a regeneration process or residue. You may remove the unsuitable thing (For example, paper, a bottle, a can, a string, a rope, etc.) which is a foreign substance which cannot be used for recycling of plastic.

  By removing the residue 4 from the easily deformable material 3 by using the easily deformable material rotating sieve device 60 or the easily deformable material transport and sorting device 70, the work that has been performed only by hand sorting is greatly reduced. This can greatly reduce labor costs. Moreover, the quality (purity) of the waste plastics of films and bags to be collected can be improved. And waste plastics (films and bags) can be separated for each material.

Next, a method for sorting waste plastic will be described.
The method for sorting waste plastic according to the present invention sorts waste plastic for recycling from waste containing plastic resource waste.
The waste plastic as used in the present invention is the same as the waste plastic in the sorting system, and the description thereof is omitted here.

≪Waste plastic sorting method≫
As shown in FIG. 7, the waste plastic sorting method (hereinafter also referred to as a sorting method as appropriate) includes a sorting step S1, a residue removing step S2, and a waste plastic sorting step S3.
Hereinafter, each step will be described.

<Separation process>
The separation step S1 rotates a hook rotor provided with a hook and entangles the hook with an easily deformable material made of a soft material, so that the waste including the plastic resource waste is changed into a hard material made of a hard material, This is a step of separating into an easily deformable product made of a soft material.

As the separation method in the separation step S1, for example, the bag breaking device 20 (see FIGS. 1 and 3) described above can be used.
In addition, since it is as having demonstrated with the bag-breaking apparatus 20 of the sorting system 100 mentioned above about a difficult-to-deformation thing, an easily-deformable thing, and the bag-breaking apparatus 20, description is abbreviate | omitted.

The difficultly deformed product separated in the separation step S1 is supplied to the residue removal step S2. On the other hand, the separated easily deformable product is discarded as it is or supplied to the residue removing step S2.
In addition, you may include the waste crushing process which crushes a waste before classification process S1. For crushing waste, for example, the crushing apparatus 10 (see FIGS. 1 and 2) described above can be used.

<Residue removal step>
The residue removing step S2 is a step of removing the residue by putting the difficultly deformed material separated in the separating step S1 into a rotating sieve and rotating it, and removing the residue from the mesh of the rotating sieve (residue for difficultly deformed material). Removal step).
Alternatively, in the step of removing the residue by transporting the difficultly deformed material separated in the separation step S1 on a transportation path formed by providing a plurality of rollers at a predetermined interval and dropping the residue from the gap in the roller interval. Yes (residue removal step for difficult deformation).

The method of removing the residue from the hardly deformable material in the residue removing step S2 uses, for example, the above-described rotary screen device 30 for hardly deformable material or the conveyance sorting device 40 for difficult deformable material (see FIGS. 1, 4 and 5). can do.
In addition, about the residue, the rotation sieve apparatus for difficult-to-deformation objects, and the conveyance sorter 40 for 30 and the hardly-deformable objects, the rotation sieve apparatus 30 for the hardly-deformable objects and the transfer-sorting apparatus 40 for the hardly deformable object described above Therefore, the description thereof is omitted here.
The hardly deformed product from which the residue is removed in the residue removing step S2 is supplied to the waste plastic sorting step S3. As for the residue, the remaining waste plastic may be collected by manual selection.

Here, in the residue removing step S2, in addition to removing the residue from the hardly deformed material, the easily deformable material separated in the separating step S1 is put into a rotating sieve and rotated, and the residue is sieved from the mesh of the rotating sieve. The residue may be removed by dropping and discharged as waste plastic of easily deformable material (residue removing step for easily deformable material).
Alternatively, in the residue removal step S2, in addition to removing the residue from the hardly deformable material, the easily deformable material separated in the separation step S1 is transported on a transport path formed by providing a plurality of rollers at predetermined intervals. Residues may be dropped from the gaps between the rollers and discharged as easily deformable waste plastic (residue removal step for easily deformable materials).

The method for removing the residue from the easily deformable material in the residue removing step S2 uses, for example, the above-described easily deformable material rotating sieve device 60 or the easily deformable material transport and sorting device 70 (see FIGS. 1, 4 and 5). can do.
Note that the easily deformable product rotary sieve device 60 and the easily deformable material transport and sorting device 70 are as described in the easily deformable material rotary sieve device 60 and the easily deformable material transport and sorting device 70 of the sorting system 100 described above. Since there is, description is abbreviate | omitted here.

  The easily deformable product from which the residue has been removed in the residue removing step S2 is conveyed to a recycling step for recycling plastic, and becomes plastic for recycling films and bags. Alternatively, it may be supplied to the waste plastic sorting step S3 (see (C) and (D) of FIG. 1). On the other hand, the residue removed from the easily deformable material is discarded as it is, or the hardly deformable material remaining in the residue may be separated in the residue removing step S2 (residue removing step for difficultly deformable material) (FIG. 1 (A)).

<Waste plastic sorting process>
The waste plastic sorting step S3 is a step of sorting the waste plastic based on the difference in the absorbance of the wavelength of the hardly deformed product from which the residue is removed in the residue removing step S2.

As the sorting method in the waste plastic sorting step S3, for example, the above-described optically sorting device 50 for difficult-to-transform objects (see FIGS. 1 and 6) can be used.
In addition, since it is as having demonstrated with the optical sorting apparatus 50 for difficult deformations of the above-mentioned sorting system 100 about the optical sorting apparatus 50 for difficult deformation, description is abbreviate | omitted here.

Here, in the waste plastic sorting step S3, in addition to sorting the waste plastic from the difficult-to-deform product, the waste contained in the residue due to the difference in the absorbance of the wavelength of the residue after sorting the waste plastic. Plastics may be sorted out (residual plastic sorting process for residues).
As a method of sorting waste plastic from the residue in the waste plastic sorting step S3, for example, the above-described residue optical sorting device 80 (see FIGS. 1 and 6) can be used.
The residue optical sorting device 80 is the same as that described in the residue optical sorting device 80 of the sorting system 100 described above, and a description thereof will be omitted here.
The waste plastic and the residue sorted in the waste plastic sorting step S3 are sorted for each material as necessary, and supplied to the recycling step for recycling the plastic.

  As described above, the waste plastic sorting system and the waste plastic sorting method according to the present invention have been described in detail with reference to the best embodiment, but the gist of the present invention is not limited to the contents described above. The scope of rights should be broadly interpreted based on the claims. Needless to say, the contents of the present invention can be widely modified and changed based on the above description.

  For example, in the sorting system according to the present invention, a roll screen may be used as the rotary sieve device. Further, instead of the optical sorting device, a wind sorting device, a combined sorting device that sorts by wind and vibration, or an X-ray sorting device may be used.

  Further, in the sorting method according to the present invention, for example, foreign substances and unsuitable materials that cannot be used for plastic recycling are removed by hand sorting before or after each step within a range that does not adversely affect each step. Manual sorting process, drying process to dry waste, difficult-to-deformation, easy-to-transform, waste plastic, etc., disinfection process to disinfect these, waste plastic grinding process to grind the obtained waste plastic, waste plastic Other steps such as a washing step for washing the substrate may be included.

It is a schematic diagram which shows the structure of the sorting system of the waste plastic which concerns on this invention. It is a schematic diagram which shows the outline of the crushing apparatus which can be used with the sorting system of the waste plastic which concerns on this invention. It is a schematic diagram which shows the outline of the bag breaking apparatus in the sorting system of the waste plastic which concerns on this invention. It is a schematic diagram which shows the outline of the rotary sieve apparatus for hardly deformable materials, or the rotary sieve apparatus for easily deformable materials in the waste plastic sorting system according to the present invention. It is a schematic diagram which shows the outline of the conveyance sorter for difficult deformations in the sorting system of waste plastics concerning this invention, or the conveyance sorter for easy deformations. It is a schematic diagram which shows the outline of the optical sorting apparatus for hardly deformed materials or the optical sorting apparatus for residues in the waste plastic sorting system according to the present invention. It is a flowchart which shows the sorting method of the waste plastic concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Waste 2 Hardly deformable 3 Easy deformable 4 Residue 5a, 5b, 5c, 5d, 5e, 5f, 5g, 5h, 5i, 5j Conveyor 5A, 5B Vibratory conveyor 6 Selection goods 7 Residue 10 Crushing device 20 Destruction Bag device 30 Rotating sieve device for hardly deformable material 40 Conveying and sorting device for difficultly deformable material 50 Optical sorting device for difficultly deformable material 60 Rotating sieve device for easily deformable material 70 Conveying and sorting device for easily deformable material 80 Optical sorting for residue Equipment 100 Waste plastic sorting system S1 Sorting process S2 Residue removal process S3 Waste plastic sorting process

Claims (8)

A waste plastic sorting system for sorting waste plastic from waste including plastic resources.
By rotating a hook rotor provided with a hook and entangled the easily deformable material made of a soft material with the hook, the waste is changed into an easily deformable material made of a hard material, an easily deformable material made of a soft material, A bag-breaking device that separates into
Rotating sieve device for difficult-to-deformate material that removes residue by putting and rotating difficult-to-deform materials separated by bag-breaking device into rotating sieve and removing residue from sieve mesh of said rotating sieve, or said bag-breaking bag Transporting difficultly deformed objects separated by the apparatus on a transport path formed by providing a plurality of rollers at predetermined intervals, and removing the residues by dropping the residues from the gaps between the rollers. A sorting device;
Optical sorting device for difficult-to-deformable materials that sorts waste plastic according to the difference in absorbance of wavelengths of difficult-to-deformable materials from which residues have been removed by the difficult-to-deformable rotary sieve device or the difficult-to-deformable material transfer and sorting device When,
A waste plastic sorting system characterized by comprising:   The easily deformable material separated by the bag breaking apparatus is put into a rotating sieve and rotated, the residue is removed by sieving the residue from the mesh of the rotating sieve, and the easily deformable material is discharged as easily deformable waste plastic. The waste plastic sorting system according to claim 1, further comprising a rotary sieve device.   The easily deformable material separated by the bag breaking device is transported on a transport path formed by providing a plurality of rollers at a predetermined interval, and the residue is dropped from the gaps in the space between the rollers, so that the easily deformable waste plastic The waste plastic sorting system according to claim 1, further comprising a transport sorting device for easily deformable material to be discharged.   An optical sorting device for residue that sorts waste plastic contained in the residue according to the difference in absorbance of the wavelength of the residue after sorting the waste plastic with the optical sorting device for difficult deformation The waste plastic sorting system according to any one of claims 1 to 3, wherein A waste plastic sorting method for sorting waste plastic from waste including plastic resource waste,
By rotating a hook rotor provided with a hook and entangled the easily deformable material made of a soft material with the hook, the waste is changed into an easily deformable material made of a hard material, an easily deformable material made of a soft material, A separation process of separating into
The difficultly deformed material separated in the separation step is put into a rotating sieve and rotated, and the residue is removed by sieving the residue from the mesh of the rotating sieve, or the difficultly deformed material separated in the separating step is removed. A residue removing step of removing the residue by transporting the transport path formed by providing a plurality of rollers at a predetermined interval and dropping the residue from a gap in the interval of the rollers;
A waste plastic sorting process for sorting waste plastic according to the difference in the absorbance of the wavelength of the hardly deformed product from which the residue has been removed in the residue removing process,
A method for sorting waste plastic, comprising:   In the residue removing step, in addition to removing the residue from the hardly deformable material, the easily deformable material separated in the separating step is put into a rotating sieve and rotated, and the residue is removed from the mesh of the rotating sieve. 6. The waste plastic sorting method according to claim 5, wherein the residue is removed and discharged as easily deformable waste plastic.   In the residue removal step, in addition to removing the residue from the hardly deformable material, the easily deformable material separated in the separation step is transported on a transport path formed by providing a plurality of rollers at predetermined intervals, and the roller 6. The method for sorting waste plastic according to claim 5, wherein the residue is dropped from a gap at an interval of and discharged as easily deformable waste plastic.   In the waste plastic sorting process, in addition to sorting the waste plastic from difficult-to-deform materials, sorting the waste plastic contained in the residue according to the difference in the absorbance of the wavelength of the residue after sorting the waste plastic. The method for sorting waste plastic according to any one of claims 5 to 7, characterized in that:

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