JP7058436B1 - Separate collection system and separate collection method for mixed crushed pieces - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a separate recovery technique having excellent recyclability for a mixed pulverized piece material in which a synthetic resin piece and a metal piece are mixed. SOLUTION: The separated and recovered system 1 of the mixed crushed piece material of the present disclosure has a stirrer 10 for generating a slurry 3 containing the mixed crushed piece material 2 and a synthetic resin piece by applying a centrifugal force to the slurry 3. Based on the reflection of light applied to the centrifuge 20 that separates 4 and the metal piece, the hopper 40 that houses the synthetic resin piece 4 separated from the slurry 3, and the synthetic resin piece 4 supplied from the hopper 40. An optical sorting device 50 for separating each synthetic resin piece and a conveyor 30 for transporting the synthetic resin piece 4 are provided. Then, in the vicinity of the second conveyor 32 of the conveyor 30, a blower 60 that causes wind power to act on the synthetic resin piece 4 conveyed by the second conveyor 32 is arranged. [Selection diagram] Fig. 1

Description

The present invention relates to a separate recovery system and a separate recovery method for a mixed pulverized piece material in which a synthetic resin piece and a metal piece are mixed.

In recent years, packaging containers made of synthetic resin and metal foil have been mass-produced and used for packaging medical devices, chemicals, foodstuffs, and the like. And, for the realization of a sustainable society, it is becoming more and more important to recycle such packaging containers collected after use or collected as defective products in the manufacturing process.

Here, the packaging containers collected as described above are often crushed into relatively small pieces, and when such a packaging container is to be recycled, the packaging container is crushed from the crushed piece material. Recycling becomes difficult unless the crushed metal pieces mixed in the resin pieces are removed. Therefore, a technique has been proposed that makes it possible to remove metal from plastic residues.

For example, Patent Document 1 discloses a reusable plastic production method for producing a reusable plastic from waste made of waste plastic including a coated electric wire. In this technique, metals are sorted and removed by electrostatic sorting from waste containing crushed metal and plastic.

Japanese Patent No. 4686827

With the aim of realizing a sustainable society and carbon neutrality, various recycling technologies for recycling waste as a resource without incinerating it are being developed, and the recycling of plastics is drawing attention. However, the plastic collected for recycling is often crushed into relatively small pieces and is often a plastic mixture in which a plurality of types of synthetic resin pieces and metal pieces are mixed. Therefore, the handling of small crushed mixed crushed piece materials and the separate recovery of each resource from the mixed crushed piece material become issues.

Here, according to the technique described in Patent Document 1, a recyclable plastic can be obtained by removing the metal from the plastic residue including the coated electric wire and the like, so that each of the plastic and the metal mixture can be obtained. It seems that separate collection of recyclable materials will be possible. However, in this technique, regarding the handling of small crushed plastic residues, the plastic residues are classified in advance into a predetermined particle size range in order to improve the sorting accuracy. Then, it becomes necessary to control the particle size range of the plastic residue, and there is a possibility that the productivity of separate collection of resources may be deteriorated due to the influence. As described above, there is still room for improvement in the technique for separating and recovering a mixture of plastic and metal with excellent recyclability.

An object of the present disclosure is to provide a separated recovery technique having excellent recyclability for a mixed pulverized piece material in which a synthetic resin piece and a metal piece are mixed.

The separated recovery system for the mixed crushed piece material of the present disclosure is a mixed crushing system for separating and recovering the synthetic resin piece and the metal piece from the mixed crushed piece material which is a crushed piece in which a synthetic resin piece and a metal piece are mixed. This is a separate collection system for single materials. This separated and recovered system for the mixed and crushed piece material separates the synthetic resin piece and the metal piece by applying a centrifugal force to the agitator for generating the slurry containing the mixed and crushed piece material and the slurry. A hopper that houses the synthetic resin piece separated from the slurry, and an optical beam that separates the synthetic resin piece based on the reflection of light radiated to the synthetic resin piece supplied from the hopper. A type sorting device and a conveyor for transporting the synthetic resin piece separated from the slurry, the first conveyor provided between the centrifuge and the hopper, and the hopper and the optical type. A conveyor including a second conveyor provided between the sorting device and the conveyor is provided. Then, in the vicinity of the second conveyor, a blower that causes wind power to act on the synthetic resin piece conveyed by the second conveyor is arranged.

The above-mentioned separate recovery system for mixed and crushed piece materials is a system for separately and recovering each synthetic resin piece and metal piece from a mixed and crushed piece material in which a plurality of types of synthetic resin pieces and metal pieces are mixed. Here, the above-mentioned plurality of types of synthetic resin pieces are formed of, for example, a polypropylene piece obtained by crushing a polypropylene (PP) case in an individual packaging container for a contact lens, and a predetermined synthetic resin (for example, acrylic resin). The crushed contact lens is a crushed piece of contact lens. Further, the metal piece is, for example, an aluminum piece obtained by crushing an aluminum foil that seals an opening of the PP case. From the mixed pulverized piece material containing such pulverized pieces, first, the metal piece and the contact lens piece are separately collected by a centrifuge. On the other hand, the remaining synthetic resin pieces (including, for example, a polypropylene piece and a polypropylene piece to which aluminum foil is attached) are transferred to an optical sorting device, and the polypropylene piece is transferred by the optical sorting device. And the polypropylene piece with the aluminum foil attached, and collected separately. Here, the mixed pulverized piece material may be mixed with a soft polyethylene piece caused by a polyethylene packaging bag. Then, when the synthetic resin piece containing such a soft polyethylene piece is supplied to the optical sorting device, the optical sorting device may cause a sorting failure. Therefore, in the separate recovery system of the present disclosure, a blower is arranged in the vicinity of the second conveyor connected to the optical sorting device, and wind power is applied to the synthetic resin pieces conveyed by the second conveyor. According to this, among the synthetic resin pieces, only the foil-shaped soft polyethylene pieces are blown off by the wind force, and the polyethylene pieces can be easily removed from the synthetic resin pieces conveyed by the second conveyor. As a result, it is possible to suppress the situation where the above-mentioned polyethylene pieces are sent to the optical sorting device, and thus it is possible to realize excellent recyclability for the separated recovery of the mixed and crushed pieces material. Further, according to such a configuration, the transfer step by the second conveyor and the step of removing the polyethylene piece from the synthetic resin piece are integrated, so that the productivity of separate collection can be maintained high.

Here, in the separated recovery system for the mixed pulverized piece material of the present disclosure, in the above configuration, the stirrer stirs the mixed liquid containing the mixed pulverized piece material, water, and a silicone emulsion to obtain the slurry. May be generated. According to this, the situation where bubbles are generated in the mixed liquid is suppressed, and the generated slurry can be preferably pumped into the centrifuge. Further, the synthetic resin piece after centrifugation can be brought into a state suitable for optical sorting due to the water-repellent effect of silicone and the surface modification effect on the synthetic resin piece.

In this case, a heater that sends warm air to the synthetic resin piece conveyed by the first conveyor may be arranged in the vicinity of the first conveyor. According to this, it is possible to suitably remove water from the synthetic resin piece conveyed by the first conveyor, and it is possible to suppress a situation in which the optical sorting device causes a sorting problem due to the water.

Further, the present disclosure can be grasped from the aspect of the separate collection method of the mixed pulverized piece material. That is, in the method for separating and recovering the mixed crushed piece material of the present disclosure, the synthetic resin piece and the metal piece are separately and recovered from the mixed crushed piece material which is a crushed piece in which the synthetic resin piece and the metal piece are mixed. A method for separating and recovering a mixed crushed piece material, in which a stirring step of stirring a mixed solution containing the mixed crushed piece material and water to generate a slurry containing the mixed crushed piece material and centrifugation into the slurry. A first sorting step for separating the synthetic resin piece and the metal piece by applying a force, and a transport step for transporting the synthetic resin piece separated from the slurry, and accommodating the synthetic resin piece. The first transport step of transporting the synthetic resin piece to the hopper, the second transport step of transporting the synthetic resin piece supplied from the hopper, and the reflection of the light irradiated to the synthetic resin piece transported by the second transport step. Based on this, it has a second separation step of separating the synthetic resin piece. Then, in the second transport step, wind power is applied to the synthetic resin piece being transported by a blower.

Here, in the stirring step, the slurry may be produced by stirring while adding a silicone emulsion to the mixed solution at a predetermined frequency.

Then, in this case, in the first transport step, warm air may be sent to the synthetic resin piece being transported by a heater.

According to the present disclosure, it is possible to provide a separated recovery technique having excellent recyclability for a mixed crushed piece material in which a synthetic resin piece and a metal piece are mixed.

It is a 1st figure which shows the schematic structure of the separated recovery system of the mixed pulverized piece material in 1st Embodiment. It is a figure for demonstrating the process of removing a soft polyethylene piece from a synthetic resin piece conveyed by a 2nd conveyor. It is a figure which shows the comparison schematically of the synthetic resin piece containing the polyethylene piece when the silicone emulsion is not added, and the synthetic resin piece containing the polyethylene piece when the silicone emulsion is added. It is a 2nd figure which shows the schematic structure of the separated recovery system of the mixed pulverized piece material in 1st Embodiment. It is a flowchart which shows the processing flow of the separation and recovery method of the mixed pulverized piece material in the modification of 1st Embodiment.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The configurations of the following embodiments are exemplary and the present disclosure is not limited to the configurations of the embodiments.

<First Embodiment>
The outline of the separate recovery system for the mixed pulverized piece material in the first embodiment will be described with reference to FIG. FIG. 1 is a first diagram showing a schematic configuration of a separate recovery system for a mixed pulverized piece material in the present embodiment. The separate collection system 1 according to the present embodiment is a system for separately collecting each synthetic resin piece and metal piece from a mixed crushed piece material which is a crushed piece in which a plurality of types of synthetic resin pieces and metal pieces are mixed. be. In this embodiment, the case where the mixed pulverized piece material is a defective product generated in the manufacturing process of individually packaged contact lenses will be described below as an example.

Here, the individual packaging container for the contact lens is composed of a polypropylene (PP) case made of synthetic resin and an aluminum foil which is a metal foil for sealing the opening of the PP case. Further, the contact lens is formed of a predetermined synthetic resin (for example, acrylic resin). Then, such contact lenses and their individual packaging containers, which are collected as defective products in the manufacturing process, are crushed into relatively small pieces. Therefore, the mixed crushed piece material 2 separately and recovered in the present embodiment is a mixture of a plurality of types of synthetic resin pieces (polypropylene piece and contact lens piece), an aluminum piece, and a polypropylene piece to which an aluminum foil is attached. The separated and recovered system 1 separately and recovers the aluminum piece, the contact lens piece, the polypropylene piece, and the polypropylene piece to which the aluminum foil is attached from the mixed and crushed piece material 2.

Then, as shown in FIG. 1, the separate collection system 1 according to the present embodiment has a stirrer 10 for generating a slurry 3 containing a mixed pulverized piece material 2 and a synthetic resin piece 4 by applying centrifugal force to the slurry 3. From the centrifuge 20 that separates the aluminum pieces and the aluminum pieces, the conveyor 30 that conveys the synthetic resin pieces 4 separated from the slurry 3, the hopper 40 that houses the synthetic resin pieces 4 separated from the slurry 3, and the hopper 40. An optical sorting device 50 for separating the supplied synthetic resin piece 4 is provided.

Here, each component constituting the separate collection system 1 will be described in detail below.

The stirrer 10 stirs the mixed liquid containing the mixed pulverized piece material 2 and water to generate a slurry 3 containing the mixed pulverized piece material 2. Here, the stirrer 10 includes a stirrer tank and a stirrer screw, and the stirrer tank contains a mixed crushed piece material 2 conveyed by a material supply conveyor, water supplied by a water supply pipe, and the like. Is thrown in. Then, the slurry 3 is generated by stirring these mixed liquids with a stirring screw.

The centrifuge 20 is a hydrocyclone that applies centrifugal force to the slurry 3 to sort by specific gravity, and utilizes the difference in specific gravity between the synthetic resin piece 4 and the aluminum piece and the contact lens piece contained in the slurry 3. Separate the synthetic resin piece 4, the aluminum piece, and the contact lens piece from 3. As shown in FIG. 1, a collection container 22 is arranged below the centrifuge 20, and aluminum pieces having a higher specific density than the synthetic resin piece 4 are separately collected from the bottom of the centrifuge 20. A washing / dehydrating machine 21 is provided between the centrifuge 20 and the recovery container 22, and the washing / dehydrating machine 21 cleans / dehydrates the aluminum pieces separated from the slurry 3.

Further, the contact lens piece (acrylic resin piece) having a higher specific gravity than the synthetic resin piece 4 is also separated and collected from the bottom of the centrifuge 20. Here, the contact lens piece (acrylic resin piece) is separately collected by a predetermined flue machine in front of the washing / dehydrating machine 21. Then, the separately collected contact lens pieces are recycled as heat energy by, for example, a thermal recycling process. Further, the aluminum pieces separated and recovered as described above are, for example, put into a hydrogen generator that generates hydrogen by reacting aluminum with an alkaline solution, and power generation is performed using the generated hydrogen. Will be recycled.

Further, the synthetic resin piece 4 having a lighter specific gravity than the aluminum piece and the contact lens piece (acrylic resin piece) is also separated by the centrifuge 20 and sent to the conveyor 30. Here, the synthetic resin piece 4 separated by the centrifuge 20 includes a polypropylene piece and a polypropylene piece to which an aluminum foil is attached. A washing / dehydrating machine 21 is also provided between the centrifuge 20 and the conveyor 30, and the washing / dehydrating machine 21 cleans / dehydrates the synthetic resin piece 4 separated from the slurry 3.

The conveyor 30 includes a first conveyor 31 provided between the centrifuge 20 and the hopper 40, and a second conveyor 32 provided between the hopper 40 and the optical sorting device 50. The conveyor 30 has a well-known configuration capable of transporting powder such as a screw conveyor.

The hopper 40 is connected to the first conveyor 31 and houses the synthetic resin piece 4 separated from the slurry 3 and conveyed by the first conveyor 31. Then, the hopper 40 is further connected to the second conveyor 32 and supplies the housed synthetic resin piece 4 to the second conveyor 32.

Here, as will be described later, the optical sorting device 50 may abnormally stop due to the material adhering to the sorter portion that sorts the material based on the reflection of the irradiated light. Then, if the optical sorting device 50 is stopped while the mixed and crushed piece material 2 is being separated and recovered by the separate recovery system 1, the entire separate and recovery system 1 must be stopped. Can occur. On the other hand, according to the configuration in which the synthetic resin piece 4 sent from the centrifuge 20 to the first conveyor 31 is once housed in the hopper 40, even if the optical sorting device 50 is stopped. , The centrifuge 20 can be continuously operated, and it is not necessary to stop the entire separate collection system 1. Therefore, it is possible to maintain the separate recovery efficiency when the mixed pulverized piece material 2 is separately collected and recycled.

The optical sorting device 50 has a sorter unit that sorts materials based on the reflection of the irradiated light. Specifically, the optical sorting device 50 determines the polypropylene piece and the polypropylene piece to which the aluminum foil is attached in the synthetic resin piece 4 based on the reflection of the light applied to the synthetic resin piece 4 supplied from the hopper 40. Color code. Then, the polypropylene piece to which the color-coded aluminum foil is attached is blown off by an air jet to separate the synthetic resin piece 4 supplied from the hopper 40 into a polypropylene piece and a polypropylene piece to which the aluminum foil is attached.

Then, the polypropylene pieces separated and collected in this way are, for example, molded into an arbitrary shape and recycled as plastic pellets.

It should be noted that preferably, two optical sorting devices 50 may be arranged. According to this, the recovery rate of the polypropylene piece from the synthetic resin piece 4 can be improved.

Here, the mixed pulverized piece material 2 may be mixed with a soft polyethylene piece caused by a polyethylene packaging bag. Then, when the synthetic resin piece 4 containing such a soft polyethylene piece is supplied to the optical sorting device 50, the polyethylene piece flies in the air in the optical sorting device 50 due to the influence of the air jet. Therefore, there is a possibility that an abnormality may occur in the sorting by the air jet, or the polyethylene piece may adhere to the sorter portion and the optical sorting device 50 may stop abnormally.

Therefore, in the separate collection system 1 of the present disclosure, as shown in FIG. 1, a blower 60 that causes wind power to act on the synthetic resin piece 4 conveyed by the second conveyor 32 is arranged in the vicinity of the second conveyor 32. Ru. The blower 60 is a device that sends wind by the rotational motion of the impeller 61, and a well-known fan or the like can be used.

Then, by the wind power acting on the synthetic resin piece 4 in this way, it is possible to suppress the situation where the polyethylene piece is sent to the optical sorting device 50. This will be described with reference to FIG.

FIG. 2 is a diagram for explaining a step of removing a soft polyethylene piece from the synthetic resin piece 4 conveyed by the second conveyor 32. As shown in FIG. 2, the soft polyethylene piece (PE piece) caused by the polyethylene packaging bag is in the form of a foil. Therefore, in the separate collection system 1 of the present disclosure, the wind power from the blower 60 is applied to the synthetic resin piece 4 conveyed by the second conveyor 32. Then, among the synthetic resin pieces 4, the granular polypropylene pieces (including the polypropylene pieces to which the aluminum foil is attached) are not largely blown off, and only the foil-shaped soft polyethylene pieces are blown off by the wind force. As a result, the soft polyethylene piece (PE piece) can be easily removed from the synthetic resin piece 4 conveyed by the second conveyor 32. As described above, according to the configuration in which the wind force from the blower 60 is applied to the synthetic resin piece 4 being conveyed by the second conveyor 32, the transfer process by the second conveyor 32 and the polyethylene piece from the synthetic resin piece 4 Since the removal process of the above is integrated, the productivity of separate collection can be maintained high. Further, the strength of the wind force from the blower 60 acting on the synthetic resin piece 4 can be appropriately adjusted based on the size of the granular polypropylene piece so that only the foil-shaped soft polyethylene piece is blown off.

When the polyethylene piece is removed by the action of wind power on the synthetic resin piece 4 in this way, it is possible to suppress the situation where the polyethylene piece is sent to the optical sorting device 50. As a result, it is possible to suppress a situation in which an abnormality occurs in sorting by an air jet in the optical sorting device 50 and a situation in which a polyethylene piece adheres to the sorter portion and the optical sorting device 50 stops abnormally. Therefore, excellent recyclability for separate recovery of the mixed pulverized piece material 2 can be realized.

Then, according to the above-mentioned separate recovery system 1, it is possible to provide a separate recovery technique having excellent recyclability for a mixed crushed piece material in which a synthetic resin piece and a metal piece are mixed.

Further, the present disclosure person has newly found that the problem in the stirring step that may occur when the mixed pulverized piece material 2 contains the contact lens piece can be solved by stirring while adding the silicone emulsion.

Here, in the stirring step, as described above, the mixed liquid containing the mixed crushed piece material 2 and water is stirred by the stirrer 10, and the slurry 3 containing the mixed crushed piece material 2 is generated. At this time, in the mixed liquid of the mixed pulverized piece material 2 containing the contact lens piece and water, bubbles are generated in the mixed liquid, and due to the influence of the bubbles, the generated slurry 3 is centrifugally separated by a pump. A new issue was found that could lead to a situation where it could not be sent to 20.

Therefore, in the present embodiment, the stirrer 10 may stir the mixed liquid containing the mixed pulverized piece material 2 and water and the silicone emulsion to generate the slurry 3 containing the mixed pulverized piece material 2. In this case, the silicone emulsion is added to the mixed solution containing the mixed pulverized piece material 2 and water at a predetermined frequency, so that the mixed solution containing the mixed pulverized piece material 2 and water and the silicone emulsion is stirred. The slurry 3 is generated. As a result, the situation where bubbles are generated in the mixed liquid is suppressed, and the generated slurry 3 can be preferably pumped into the centrifuge 20.

The above-mentioned silicone emulsion is an emulsion-type silicone having an active ingredient of 15%, which is an emulsified silicone oil compound, and has excellent dilute dispersity. Highly compatible with. Then, in the present embodiment, such a silicone emulsion is charged into the stirring tank as an undiluted solution every hour, and 500 cc of the silicone emulsion per day is charged into the stirring tank.

Further, the stirrer 10 stirs the mixed liquid containing the mixed pulverized piece material 2, water, and the silicone emulsion to generate the slurry 3. In the optical sorting apparatus 50, the synthetic resin piece 4 is formed in the sorter portion. It is possible to suppress a situation in which the optical sorting device 50 adheres and stops abnormally.

Here, the synthetic resin piece 4 separated from the slurry 3 by the centrifuge 20 is washed and dehydrated by the washing / dehydrating machine 21 before being conveyed by the conveyor 30, but water remains in the synthetic resin piece 4. It may end up. Then, due to this moisture, a situation may occur in which the synthetic resin piece 4 adheres to the sorter portion in the optical sorting device 50. On the other hand, according to the fact that the slurry 3 is generated by stirring the mixed solution containing the silicone emulsion, the water-repellent effect of the silicone preferably removes water by washing and dehydrating by the washing and dehydrating machine 21. .. Further, even if water remains in the synthetic resin piece 4 sent to the optical sorting device 50, the synthetic resin piece 4 adheres to the sorter portion due to the surface modification effect of the silicone on the synthetic resin piece 4. It is possible to suppress the situation where it ends up. This makes it possible to suitably separate and recover the resources from the mixed pulverized piece material 2.

Further, in such a configuration, the wind power from the blower 60 makes it possible to suitably remove the soft polyethylene piece from the synthetic resin piece 4 conveyed by the second conveyor 32. This will be described with reference to FIG.

FIG. 3 is a diagram schematically showing a comparison between a synthetic resin piece 4 containing a polyethylene piece when a silicone emulsion is not added and a synthetic resin piece 4 containing a polyethylene piece when a silicone emulsion is added. be. Here, FIG. 3A shows a synthetic resin piece 4 containing a polyethylene piece when the silicone emulsion is not added. In this case, the synthetic resin pieces are affected by the moisture remaining in the synthetic resin piece 4. Are overlapped with each other, and polyethylene pieces tend to adhere to them. On the other hand, FIG. 3B shows a synthetic resin piece 4 containing a polyethylene piece when a silicone emulsion is added, and in this case, due to the water-repellent effect of silicone and the surface modification effect on the synthetic resin piece 4. The synthetic resin pieces do not adhere to each other, and the polyethylene pieces do not adhere to them.

According to this, there is little possibility that the removal of the polyethylene pieces by the wind power from the blower 60 is hindered by the overlapping of the synthetic resin pieces and the adhesion of the polyethylene pieces to the synthetic resin pieces. Therefore, the soft polyethylene piece (PE piece) can be more easily removed from the synthetic resin piece 4 conveyed by the second conveyor 32, and thus excellent recycling for the separated recovery of the mixed crushed piece material 2 is possible. Sex can be realized.

In such a separate collection system 1, a heater 70 that sends warm air to the synthetic resin piece 4 conveyed by the first conveyor 31 may be arranged in the vicinity of the first conveyor 31. Here, FIG. 4 is a second diagram showing a schematic configuration of a separate recovery system for mixed pulverized pieces materials in the present embodiment.

As shown in FIG. 4, when the heater 70 is arranged, the synthetic resin piece 4 conveyed by the first conveyor 31 is dried by the warm air from the heater 70. Then, moisture can be suitably removed from the synthetic resin piece 4 conveyed by the first conveyor 31, and the situation where the synthetic resin piece 4 adheres to the sorter portion of the optical sorting apparatus 50 due to the moisture is suppressed. be able to.

According to the separate recovery system 1 described above, it is possible to provide a separate recovery technique having excellent recyclability for a mixed crushed piece material in which a synthetic resin piece and a metal piece are mixed.

<Modified example of the first embodiment>
A modified example of the first embodiment will be described with reference to FIG. This modification is a method for separating and recovering a mixed crushed piece material in which each synthetic resin piece and a metal piece are separately and recovered from a mixed crushed piece material which is a crushed piece in which a plurality of types of synthetic resin pieces and metal pieces are mixed. Is.

FIG. 5 is a flowchart showing a processing flow of the method for separating and recovering the mixed pulverized piece material in the present modification.

In this flow, first, the stirring step is executed in S101. In the treatment of S101, the mixed liquid containing the mixed pulverized piece material and water is stirred to generate a slurry containing the mixed pulverized piece material. The details of this stirring step are as described in the above description of the first embodiment. Further, in this stirring step, a slurry may be produced by stirring while adding a silicone emulsion to the above-mentioned mixture at a predetermined frequency.

Next, in S102, the first sorting step is executed. In the treatment of S102, the synthetic resin piece and the metal piece are separated by applying a centrifugal force to the slurry. The details of this first sorting step are as described in the above description of the first embodiment.

Next, in S103, the first transfer step is executed. In the treatment of S103, the synthetic resin piece separated from the slurry is conveyed to the hopper. The details of this first transfer step are as described in the above description of the first embodiment. Further, in this first transfer step, warm air may be sent to the transferred synthetic resin piece by a heater.

Next, in S104, the second transfer step is executed. In the process of S104, the synthetic resin piece supplied from the hopper is conveyed. Then, in this second transfer step, wind power is applied to the transferred synthetic resin piece by a blower. The details of this second transfer step are as described in the above description of the first embodiment.

Next, in S105, the second sorting step is executed. In the process of S105, the synthetic resin piece is separated based on the reflection of the light applied to the synthetic resin piece conveyed by the second transfer step. The details of this second sorting step are as described in the above description of the first embodiment. Then, after the treatment of S105, the execution of this flow is completed, and the synthetic resin piece and the metal piece are separately collected from the mixed pulverized piece material.

Further, the method for separating and recovering the mixed and crushed piece material described above can also provide a separate and recovering technique having excellent recyclability for the mixed and crushed piece material in which the synthetic resin piece and the metal piece are mixed.

1 ... Separation and recovery system 2 ... Mixed and crushed piece material 10 ... Stirrer 20 ... Centrifugator 30 ... Conveyor 31 ... First conveyor 32 ...・ ・ 2nd conveyor 40 ・ ・ ・ ・ Hopper 50 ・ ・ ・ ・ Optical sorting device 60 ・ ・ ・ ・ Blower

Claims (4)

A separate collection system for a mixed crushed piece material that separates and recovers the synthetic resin piece and the metal piece from the mixed crushed piece material that is a crushed piece in which a synthetic resin piece and a metal piece are mixed.
A stirrer for producing a slurry containing the mixed pulverized piece material, and
A centrifuge that separates the synthetic resin piece and the metal piece by applying centrifugal force to the slurry.
A hopper for accommodating the synthetic resin piece separated from the slurry, and
An optical sorting device that separates the synthetic resin piece based on the reflection of light applied to the synthetic resin piece supplied from the hopper.
A conveyor for transporting the synthetic resin piece separated from the slurry, the first conveyor provided between the centrifuge and the hopper, and between the hopper and the optical sorting device. Conveyor including the second conveyor provided in
Equipped with
The stirrer produces the slurry by stirring a mixed liquid containing the mixed pulverized piece material, water and a silicone emulsion.
In the vicinity of the second conveyor, a blower for applying wind power to the synthetic resin piece conveyed by the second conveyor and whose surface is modified by the silicone contained in the silicone emulsion is arranged. Be done,
Separate collection system for mixed crushed pieces. A heater that sends warm air to the synthetic resin piece conveyed by the first conveyor is arranged in the vicinity of the first conveyor.
The separate collection system for the mixed pulverized piece material according to claim 1 . A method for separating and recovering a mixed crushed piece material, which separates and recovers the synthetic resin piece and the metal piece from the mixed crushed piece material which is a crushed piece in which a synthetic resin piece and a metal piece are mixed.
A stirring step of stirring the mixed liquid containing the mixed pulverized piece material and water to generate a slurry containing the mixed pulverized piece material.
The first separation step of separating the synthetic resin piece and the metal piece by applying a centrifugal force to the slurry,
A transport step for transporting the synthetic resin piece separated from the slurry, the first transport step for transporting the synthetic resin piece to a hopper containing the synthetic resin piece, and the like.
A second transport step for transporting the synthetic resin piece supplied from the hopper, and
A second sorting step of separating each synthetic resin piece in the synthetic resin piece based on the reflection of light applied to the synthetic resin piece transported by the second transport step.
Have,
In the stirring step, the slurry is produced by stirring while adding a silicone emulsion to the mixture at a predetermined frequency.
In the second transport step, a blower is used to apply wind power to the synthetic resin piece that is being transported and whose surface is modified by the silicone contained in the silicone emulsion .
Separate collection method for mixed crushed pieces. In the first transport step, warm air is sent to the synthetic resin piece being transported by a heater.
The method for separating and recovering a mixed pulverized piece material according to claim 3 .

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