JP2003071386A - Apparatus for sorting/recovering lightweight plastic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for sorting/recovering lightweight plastic in which the wind velocity of conveying air in a conveying pipeline for conveying the sorted lightweight plastic can be set independently from the wind velocity of sorting air in an air sorter. SOLUTION: A suction port for sucking outdoor air is arranged in a lightweight plastic receiving part of the air sorter or on the conveying pipeline for conveying the lightweight plastic. Otherwise, a return pipeline for supplying the exhaust from a blower is connected to the lightweight plastic receiving part or the conveying pipeline.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light weight plastic sorting and collecting apparatus suitable for sorting and collecting plastics, and particularly for sorting and collecting film plastics from plastic wastes containing film plastics.

[0002]

2. Description of the Related Art (Sorting / Recovering Apparatus) FIG. 7 is a block diagram showing a conventional sorting / recovering apparatus for plastic waste. Figure 7
In, a plastic conveyor (for example, plastic waste containing metal, glass scraps, etc.) is supplied to a vertical air sorter 20 described below, and a vertical air sorter for separating plastic from the supplied plastic waste. Machine 20 and the separated plastic 40
Pipes 30 for air-transporting, a separator 40 for separating plastic and air, a blower 60 for discharging the air after the plastic is separated, a separator 40 and a blower 60
An air supply pipe 50 connecting the two, a dust collector 80 for separating dusts contained in the exhaust gas discharged by the blower 60,
An exhaust pipe 70 connecting the blower 60 and the dust collector 80,
A deodorizing device 90 that removes odors from the exhaust gas after dust collection is arranged, and the deodorized air is discharged to the atmosphere.

(Vertical Air Sorter) FIG. 8 is a side sectional view showing a vertical air sorter installed in a conventional plastic waste sorter / collector. In FIG. 8, the vertical air sorter 20 is composed of a tubular body (non-lightweight plastic drop portion 22 and light weight plastic receiving portion 23) bent once or a plurality of times in a substantially V-shape, and air is blown upward from below. Is flowing. Therefore, of the plastic mixture supplied into the cylinder, the light weight one rises with the rising air, while the heavy weight (non-light weight) falls. Further, when there are a plurality of bends, the sorting accuracy is improved due to the rising air turbulence in the bent portions or the rising plastic colliding with the wall surface.

That is, in the plastic mixture, the non-lightweight plastic dropping portion 22 (the plastic mixture lowering portion 21 of the cylindrical body is installed through the plastic mixture lowering portion 21 installed obliquely downward). It is thrown into the range below the position). The lightweight plastic contained in the plastic mixture rises together with the rising air toward the lightweight plastic receiving portion 23 (range above the position where the plastic mixture throwing portion 21 of the cylindrical body is installed), and the upper end portion 24 More discharged.

On the other hand, the plastic mixture left after the lightweight plastic has risen, mainly unsuitable objects such as pebbles, glass pieces, and metal pieces (hereinafter referred to as non-lightweight plastic) are opposed to the rising air. It falls and is discharged from the lower end portion 25. In addition, the rising air (hereinafter, referred to as selection air) is the lower end portion 25 of the non-lightweight plastic dropping portion 22.
Alternatively, it is supplied from an air intake duct 26 provided in the middle part. At this time, the rising air flow is usually of the suction type from above, but there is also the blowing type from below.

(Horizontal Air Sorter) FIG. 9 is a sectional side view showing a horizontal air sorter installed in a conventional plastic waste sorting and collecting apparatus. In FIG. 9, a horizontal air sorter 400 includes a nozzle 401 that horizontally ejects air.
A scraper conveyor 402 for dropping the plastic mixture on the front surface of the nozzle 401, and a plurality of bunkers 403, 4 for collecting the plastic mixture scattered by the air.
04 and 405, and an exhaust duct 406.

Therefore, pebbles that are difficult to be blown off, unsuitable objects such as glass pieces and metal pieces fall on the first bunker 403 near the nozzle 401, while light plastic that is easily blown off is blown off on the third distant place from the nozzle 401. Falls on the bunker 405.

The number of bunker installations can be appropriately set according to the purpose of selection. Generally, a vertical type air sorter is suitable for sorting small items of about 50 mm and a horizontal type for 100 mm, and if a grizzly type vibrating conveyor is used as a feeding device, fine residues can be separated and supplied in advance. Since the objects can be uniformly spread in the width direction, the selection is stable.

Further, in addition to the direction in which the air is blown out from the nozzle 401, there is a case in which the diagonally upper side is diagonally downward.

[0010]

However, in the prior art, it was easy to separate the pebbles, glass scraps and metals contained in the plastic waste from the plastic waste. When film-like plastic or bottle-like plastic is contained, it is difficult to separate these plastic wastes.

For example, it was necessary to reduce the sorting wind speed (the sorting air velocity) in the vertical air sorter 20 to about 5 m / s. Further, since the selected air conveys the selected film-shaped plastic in the transportation pipe 30, the wind velocity in the transportation pipe 30 is also lowered at the same time, which makes smooth and steady transportation impossible.

Further, intermittent transportation occurs when the amount of the plastic mixture supplied changes or the ratio of the lightweight plastic contained in the plastic mixture changes, which causes the pressure in the transportation pipe 30. The sorting wind speed itself fluctuated under the influence of loss fluctuation (pulsation), and stable sorting operation and sorting accuracy could not be guaranteed. In addition, the plastic sometimes stays in the middle of transportation, and the transportation pipe 30 may be blocked.

Further, making the transportation pipes thin and increasing the wind speed of the transportation air limits the size of the transportation object, or limits the selection range of the sorting wind speed according to the characteristics of the transportation object. Therefore, it was not practical.

The present invention has been made to solve the above problems, and is lightweight in which the wind speed of the transport air in the transport pipe can be set independently of the wind speed of the sorted air in the air sorter. An object is to provide a sorting and collecting apparatus for plastics.

[0015]

[Means for Solving the Problems] A light weight plastic sorting and collecting apparatus of the present invention for solving the above problems is as follows.

[1] A light-weight plastic sorting and collecting apparatus for sucking or blowing away the light-weight plastic from a plastic mixture containing the light-weight plastic together with air, wherein the plastic mixture is a non-light-weight plastic dropping part described later. And a light weight plastic receiving part for receiving the light weight plastic that has been sucked or blown away by air together with air, and a non-light weight plastic from which the plastic mixture drops after the light weight plastic has been sorted out. An air sorter having a drop part, the lightweight plastic blown away by suction or air together with air, a separator for separating the air and the lightweight plastic, and a blower for sucking the air separated in the separator, The lightweight A transport pipe connecting the plastic receiving part and the separator, a blower pipe connecting the separator and the blower, and an exhaust pipe installed on the downstream side of the blower, and the lightweight plastic receiving part or the The transport pipe is provided with a suction port for sucking the atmosphere.

[2] A light weight plastic sorting and collecting apparatus for sucking or blowing away the light weight plastic from a plastic mixture containing the light weight plastic with air, wherein the plastic mixture is a non-light weight plastic dropping part described later. And a light weight plastic receiving part for receiving the light weight plastic that has been sucked or blown away by air together with air, and a non-light weight plastic from which the plastic mixture drops after the light weight plastic has been sorted out. An air sorter having a drop part, the lightweight plastic blown away by suction or air together with air, a separator for separating the air and the lightweight plastic, and a blower for sucking the air separated in the separator, The lightweight A transport pipe connecting the plastic receiving unit and the separator, a blower pipe connecting the separator and the blower, an exhaust pipe installed on the downstream side of the blower, the exhaust pipe, and the lightweight plastic receiving unit or the A return pipe connecting the transportation pipe is provided, and a part or all of the discharged air is supplied to the lightweight plastic receiving portion or the transportation pipe.

[3] In the above [2], there is a circulation pipe connecting the return pipe and the non-lightweight plastic dropping part, and a part of the discharged air is supplied to the non-lightweight plastic dropping part. It is characterized by that.

[4] In the above [3], air blocking means is installed vertically below the connecting portion of the circulation pipe of the non-lightweight plastic dropping portion.

[5] In any one of the above [1] to [4], the lightweight plastic is a film plastic.

[6] In any one of the above [1] to [4], the lightweight plastic is a bottle-shaped plastic.

[7] The first lightweight plastic sorting and collecting apparatus according to any one of [1] to [4], and the second lightweight plastic according to any of [1] to [4]. And a non-lightweight plastic drop portion of the first light weight plastic sorting and collecting apparatus is connected to the plastic mixture lowering portion of the second light weight plastic sorting and collecting apparatus. .

[8] A first light-weight plastic sorting / collecting device according to the above [5] and a second light-weight plastic sorting / collecting device according to the above-mentioned [6]. The non-lightweight plastic dropping part of the device is connected to the plastic mixture lowering part of the second light weight plastic sorting and collecting device, and the film plastic is separated by the separator of the first light weight plastic sorting and collecting device. It collects and separates and collects the bottle-shaped plastic in the separator of the second light weight plastic sorting and collecting apparatus.

[0024]

BEST MODE FOR CARRYING OUT THE INVENTION [First Embodiment] FIG. 1 is a configuration diagram showing an embodiment of a light weight plastic sorting and collecting apparatus according to the present invention. It should be noted that the same parts as those of the conventional technique described in FIG.

In FIG. 1, a suction pipe 90 for sucking air into the lightweight plastic receiving portion 23 of the vertical air sorter 20.
0 is set. A suction adjusting valve 901 is installed in the suction pipe 900. Therefore, by adjusting the exhaust amount of the blower 70 and the opening degree of the suction adjustment valve 901, the flow velocity and flow rate of the selection air (the air rising the non-lightweight plastic drop portion 22) are guaranteed, and then the transportation pipe 30 is provided. You can adjust the flow rate and flow rate of the transport air,
The film plastic can be transported smoothly.

The adjustment may be carried out by a manual setting method, or the selection status may be monitored by ITV or the like, and remote operation may be performed if necessary. The blower 70 and the suction adjustment valve 901 may be cascade-controlled when the variation characteristics of the objects to be sorted are known in advance. In addition, even if there are many light things such as films and many solid things, each condition is preset and the operator can automatically adjust to the optimum setting conditions by pressing the selection switch. Good.

On the contrary, when the characteristics of the object to be processed are known and its fluctuation is small, the suction adjustment 901 may be of a fixed type.

In FIG. 1, since the rotary valve 11 is installed at the connecting portion between the supply conveyor 10 and the supply portion 21 and the airtightness of the plastic mixture lowering portion 21 is maintained, the non-lightweight plastic dropping portion 22 is raised. Sorted air enters through the opening (the outlet for non-lightweight plastic) of the lower end portion 25 of the cylindrical body, and the entire amount is sucked into the lightweight plastic receiving portion 23.

The installation position of the suction pipe is not limited to the position shown in the figure, and in the case of a cylinder having a plurality of bends, it is located away from the intersection with the plastic mixture lowering portion 21 (the same as the branching portion). It may be located at a position or may be directly installed on the transportation pipe 30.

The supply conveyor may be of a belt type, a vibrating type or a slanted surface and a rotary valve, and a method can be selected according to the size and characteristics of the plastic mixture to be supplied.

When the plastic mixture is waste plastic discharged from general households, it is packed in a bag or the like, so that the contents can be easily sorted by a bag breaking machine or a crusher in advance. It is better to coarsely crush to a size of about 100 mm before supplying.

With the above structure, it is possible to reliably select the film-like plastic and the hard plastic at a low wind speed, and the selected film-like plastic can be transported smoothly. In addition, in order to make it difficult for the film-shaped plastic to stay at the branching portion (the joining portion of the plastic mixture lowering portion 21 and the lightweight plastic receiving portion 23) to cause clogging, the size of the feed is 100 m
It is better to pre-crush to m or less. 50 mm if possible
The following are preferred. Furthermore, if an air blowing nozzle is provided at the branch portion, retention at the branch portion can be more reliably avoided.

[Embodiment 2] FIG. 2 is a block diagram showing an embodiment of a light weight plastic sorting and collecting apparatus according to the present invention. It should be noted that the same parts as those of the conventional technique described in FIG. 8 are denoted by the same reference numerals and the description thereof is partially omitted.

In FIG. 2, an exhaust pipe 70 is provided with an exhaust adjusting valve 71, and an exhaust adjusting valve 71 is provided upstream (blower 6
0) and a return pipe 100 that connects the lightweight plastic receiving portion 23 of the vertical air sorter 20 is installed.
A return adjusting valve 101 is installed in the pipe 100. Therefore, by adjusting one or both of the exhaust control valve 71 and the return control valve 101, the flow velocity and flow rate of the transport air in the transport pipe 30 can be secured, and the film-shaped plastic is transported smoothly.

The adjustment may be carried out by a manual setting method, or the selection status may be monitored by ITV or the like and remote operation may be performed if necessary. When the variation characteristics of the objects to be sorted are known to some extent in advance, the angle of the return adjustment valve 101 for the suction air volume of the blower and the exhaust air volume or the return air volume may be cascade controlled. In addition, even if there are many light things such as films and many solid things, each condition is preset and the operator can automatically adjust to the optimum setting conditions by pressing the selection switch. Good. On the contrary, when the characteristics of the object to be processed are grasped and its fluctuation is small, the return adjusting valve 101 may be of a fixed type. Instead of the exhaust control valve 71, a three-way valve may be arranged at the branch portion.

In FIG. 2, since the rotary valve 11 is installed at the connecting portion between the supply conveyor 10 and the supply portion 21 and the airtightness of the plastic mixture lowering portion 21 is maintained, the non-lightweight plastic dropping portion 22 is raised. Sorted air enters through the opening (the outlet for non-lightweight plastic) of the lower end portion 25 of the cylindrical body, and the entire amount is sucked into the lightweight plastic receiving portion 23.

The installation position of the return pipe is not limited to the illustrated position, and in the case of a cylindrical body having a plurality of bends, it is located away from the intersection with the plastic mixture lowering portion 21 (the same as the branching portion). It may be located at a position or may be directly installed on the transportation pipe 30.

The supply conveyor may be of a belt type, a vibration type or a slanted surface and a rotary valve, and a method can be selected according to the size and characteristics of the plastic mixture to be supplied.

When the plastic mixture is waste plastic discharged from a general household, it is packed in a bag or the like, so that the contents can be easily sorted by a bag breaking machine or a crushing machine in advance. It is better to coarsely crush to a size of about 100 mm before supplying.

With the above construction, it is possible to reliably select the film-like plastic and the hard plastic at a low wind speed, and the selected film-like plastic can be transported smoothly. Further, since the amount of air supplied to the dust collector 80 and the deodorizing device 90 is drastically reduced, the equipment can be made small and simple.

Since the film-shaped plastic is less likely to stay and block at the branch portion (where the plastic mixture lowering portion 21 and the lightweight plastic receiving portion 23 meet), it is difficult to cause clogging.
It is better to pre-crush the feed to a size of 100 mm or less. If possible, it is preferably 50 mm or less. Furthermore, if an air blowing nozzle is provided at the branch portion, retention at the branch portion can be more reliably avoided.

[Third Embodiment] FIG. 3 is a block diagram showing another embodiment of the light weight plastic sorting and collecting apparatus according to the present invention. The same parts as those of the second embodiment described with reference to FIG. 2 are designated by the same reference numerals, and the description thereof is partially omitted.

In FIG. 3, an exhaust adjusting valve 71 is provided in the exhaust pipe 70, and the upstream side of the exhaust adjusting valve 71 (blower 6
0) and a return pipe 100 that connects the rising portion 23 of the vertical air sorter 20 to each other.
Is branched, and the branched portion (hereinafter referred to as the circulation pipe 110) is connected to the non-lightweight plastic dropping portion 22 of the vertical air sorter 20. Further, a rotary valve 27 is installed near the lower end 25 of the non-lightweight plastic dropping part 22.

Therefore, by adjusting one or both of the exhaust adjusting valve 71 and the return adjusting valve 101, the flow velocity and flow rate of the transport air in the transport pipe 30 can be secured, and the flow velocity and flow rate of the sorting air can be ensured. Can be adjusted. At this time, the selected air (air rising in the non-lightweight plastic dropping part 22) is prevented from invading the plastic mixture lowering part 21, that is, exhausted from the exhaust control valve by an amount corresponding to the expected amount of air. Therefore, a part of the plastic mixture is not blown up from the supply conveyor 10.

When the wind speed of the transport air in the transport pipe 30 is 20 m / s, the wind speed of the sorted air can be adjusted within the range of 5 to 15 m / s.

Further, since the selection air is supplied from the circulation pipe 110, it is not necessary to hermetically seal the plastic mixture lowering portion 21, so that the rotary valve 11 shown in the first embodiment can be omitted. This alleviates the restrictions on the size of the plastic mixture to be added.

Therefore, with the above construction, it is possible to reliably select the film-shaped plastic and the hard plastic at a low wind speed, and the selected film-shaped plastic can be transported smoothly. Further, since the amount of air supplied to the dust collector 80 and the deodorizing device 90 is drastically reduced, the equipment can be made small and simple.

[Fourth Embodiment] FIG. 4 is a block diagram showing another embodiment of the light weight plastic sorting and collecting apparatus according to the present invention. The same parts as those of the third embodiment described with reference to FIG. 3 are designated by the same reference numerals, and part of the description will be omitted.

In FIG. 4, the non-lightweight plastic drop portion 22 of the first lightweight plastic sorting and collecting apparatus shown in FIG. 3 is the second lightweight plastic sorting and collecting apparatus shown in FIG. Of the light weight plastic sorting and collecting apparatus 2 is connected to the plastic mixture feeding unit 221. The separator 40 of the first light weight plastic sorting and collecting apparatus 1 separates and collects the film-like plastic to obtain the second lightweight plastic. The separator 240 of the plastic sorting and collecting apparatus 2 separates and collects bottle-shaped plastic.

That is, the plastic mixture after the light weight plastics have been selected and removed by the first light weight plastics sorting and collecting apparatus 1 falls through the non-lightweight plastics drop section 22, and the second light weight plastics sorting and collecting apparatus 2 It is thrown into the plastic mixture feeding section 221 of.

Second light weight plastic sorting and collecting apparatus 2
Is a vertical air sorter 220 for separating the intermediate-weight plastic from the supplied plastic mixture, a transportation pipe 230 for pneumatically transporting the separated intermediate-weight plastic to the separator 240 described later, and separating the intermediate-weight plastic and air. Separator 240, blower 260 that discharges air after the intermediate weight plastic has been separated, blower pipe 250 that connects separator 240 and blower 260, and blower 26
An exhaust pipe 270 for guiding the exhaust gas discharged by 0,
It has a circulation pipe 310 that connects the exhaust pipe 270 and the non-lightweight plastic drop portion 222.

A rotary valve 227 is installed near the lower end 225 of the non-lightweight plastic dropping part 222. Therefore, the air supplied by the blower 260 is an intermediate weight plastic (bottle plastic).
It serves as the sorting air for sorting and the transporting air for transporting the sorted intermediate weight plastic (bottle plastic). In the second light weight plastic sorting and collecting apparatus 2, the wind speed of the sorting air is as high as 20 m / s in order to sort the bottle plastic and the foreign matters such as glass scraps and metals.

Therefore, it becomes possible to continuously select the film-based plastic, the bottle-based plastic and the other plastics, and the selected film-based plastic can be transported smoothly. Furthermore, dust collectors and deodorizers can be integrated,
Moreover, since the amount of air supplied to them is drastically reduced, the equipment can be made small and simple.

[Fifth Embodiment] FIG. 5 is a block diagram showing another embodiment of the light weight plastic sorting and collecting apparatus according to the present invention. In FIG. 5, a mixture of plastics (eg, plastic waste including lightweight plastics)
To a horizontal air sorter 520 described below, a horizontal air sorter 520 for separating a lightweight plastic from the supplied plastic mixture, and a transportation pipe for pneumatically transporting the separated lightweight plastic to a separator 540 described later. 530, a separator 540 for separating the lightweight plastic from the air, a blower 560 for sending the air after the lightweight plastic has been separated, an air supply pipe 550 for connecting the separator 540 and the blower 60, and an exhaust by the blower 560. An exhaust pipe 570 for radiating the released air to the atmosphere is arranged. According to the first embodiment, exhaust pipe 570 may be connected to a dust collector or a deodorizing device.

The horizontal air sorter 520 includes a blowing nozzle 521 for blowing air obliquely upward and a blowing nozzle 52.
1, a supply conveyor 510 for dropping the plastic mixture into the flow of air blown out from No. 1, and a blowing nozzle 521.
A light weight plastic receiving portion 523 which is disposed diagonally above and which receives the light weight plastic blown away by the blown air, and a non-lightweight plastic drop portion 522 where the non-lightweight plastic not blown away by the blown air falls. Have Further, a suction valve 524 for taking in outside air is installed in the lightweight plastic receiving portion 523, and is connected to the transportation pipe 530. Therefore, the received lightweight plastic is sucked and transported to the separator 540 together with the air sucked by the suction valve 524, separated from the air in the separator 540, and then supplied to the compression packing machine 800.

Upstream of the supply conveyor 510, the bag breaking machine 5
00 is arranged, and the non-lightweight plastic drop portion 52 is arranged.
A hand selection conveyor 700 is arranged downstream of the line 2. This is to recycle the waste plastic discharged from general households covered by the Container and Packaging Law. That is, as plastics discharged from ordinary households, film-like plastics such as bags and wraps, and hard plastics such as shampoo bottles are put in garbage bags. For this reason, the bag breaking machine 500 was installed to once make it easy to sort the plastic in the dust bag, and then the plastic was supplied to the wind power sorter 520 by the supply conveyor 510.

10 to 20% of unsuitable materials such as toys and glass products other than plastic are contained in the collected garbage bag, and it is necessary to sort these from plastic. Usually, plastics that have been crushed are light and have a large processing volume, and the volume of films alone accounts for about 70% of the total. Therefore, it is difficult to find the unsuitable object because the unsuitable object is hidden under the films. For this reason,
By sorting and collecting only large-volume films without mixing unsuitable substances, manual sorting can be greatly reduced.

The wind speed of the transportation piping is always 15 m / s.
The opening degree of the suction valve 524 was adjusted so that Further, the wind speed of the suction part can be adjusted in the range of 0 to 15 m / s, and the atmosphere intake valve was gradually closed and adjusted so that only the films could be collected so that unsuitable materials did not mix.

Below the air sorter 520, a hand sorting conveyor 700 is provided so that unsuitable materials mixed with plastic such as bottles and conveyed can be collected by hand sorting. The non-lightweight plastic from which the unsuitable material is removed merges with the film-shaped plastic collected by the air sorter, and is packed by the compression packing machine 800.

With the above construction, the blown lightweight plastic is sucked and transported, so that the sorting accuracy is improved. That is, since the wind speed (suction wind speed) of the lightweight plastic receiving part can be freely adjusted, it is possible to adjust only the film-shaped plastic to be sucked (in the past, not only normal films but also bottles are sucked). Also, it was easy to inhale film-like plastic with unsuitable materials). Therefore, the selected film-shaped plastic can be directly conveyed to the packing machine 800.

Further, since only the large-volume films are collected in advance, it is possible to reduce the size of the hand selection conveyor, and it becomes easy to find the unsuitable objects, so that it is possible to reduce the number of hand selection personnel. became.

[Embodiment 6] FIG. 6 is a block diagram showing another embodiment of the light weight plastic sorting and collecting apparatus according to the present invention. The same parts as those in the fifth embodiment described with reference to FIG. 5 are designated by the same reference numerals, and part of the description will be omitted.

In FIG. 6, a supply conveyor 5 for supplying a plastic mixture (for example, plastic waste including lightweight plastic) to a horizontal air sorter 520 described below.
10, a horizontal air sorter 520 for separating the lightweight plastic from the supplied plastic mixture, a transportation pipe 530 for pneumatically transporting the separated lightweight plastic to a separator 540 described later, and a separator for separating the lightweight plastic and air 540, a blower 560 that sends air after the lightweight plastic is separated, an air supply pipe 550 that connects the separator 540 and the blower 60, an exhaust pipe 570 that sends the air discharged by the blower 560, and an exhaust pipe 570. It has a bypass pipe 600 branched from the above and a circulation pipe 610.

The bypass pipe 600 is connected to the transportation pipe 530 to supply the transportation air, while the circulation pipe 610 is connected to the blowing nozzle 521 to supply the sorting air.

A three-way valve 571 is installed at the branch portion,
The amount of air sent to each pipe is adjusted. Since the suction air amount is slightly smaller than the blown air amount, air leaks to the outside, but there was no hindrance in operation, so exhaust pipes to the outside of the system are not provided, but it is not limited to this. A dust collector or a deodorizing device may be connected according to the first embodiment.

With the above configuration, in addition to the effects of the sixth embodiment, the sorting air for blowing up the lightweight plastic is supplied by the blower 70, so that it is not necessary to install a dedicated blower for the sorting air.

[0067]

According to the above-described apparatus for sorting and recovering lightweight plastics of the present invention, since a part of the transportation air is returned and used as sorting air, the following remarkable effects are obtained. 1) The wind speed of the transport air for transporting the selected lightweight plastic can be kept constant without being affected by the wind speed of the sort air of the sorter, and stable transport can be achieved. 2) Furthermore, the wind speed of the sorting air of the sorting machine is stable, and sorting accuracy is guaranteed. 3) Furthermore, the adjustment of the wind speed of the sorting air is simplified by adjusting the adjustment valve. 4) Also, since air is circulated and used, exhaust system equipment such as a dust collector and a deodorizing device can be omitted or minimized. 5) Since it is not necessary to provide a rotary valve or the like for ensuring the airtightness in the plastic mixture charging portion, it becomes possible to select films having a relatively large shape as a selection target. 6) It is possible to sort three kinds of materials by connecting the air sorters of the light weight plastic sorter / collector of the present invention in two stages. Furthermore, the dust collector and the deodorizer can be greatly reduced by greatly reducing the exhaust air volume. It became possible to miniaturize. 7) In the horizontal air sorter, since the film-shaped plastic blown up and having no unsuitable parts is sucked and transported, the sorting accuracy is improved.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a lightweight plastic sorting and collecting apparatus according to the present invention.

FIG. 2 is a configuration diagram showing another embodiment of the lightweight plastic sorting and collecting apparatus according to the present invention.

FIG. 3 is a configuration diagram showing another embodiment of the lightweight plastic sorting and collecting apparatus according to the present invention.

FIG. 4 is a configuration diagram showing another embodiment of the lightweight plastic sorting and collecting apparatus according to the present invention.

FIG. 5 is a configuration diagram showing another embodiment of the lightweight plastic sorting and collecting apparatus according to the present invention.

FIG. 6 is a configuration diagram showing another embodiment of the lightweight plastic sorting and collecting apparatus according to the present invention.

FIG. 7 is a block diagram showing a conventional plastic waste sorting and collecting apparatus.

FIG. 8 is a cross-sectional side view showing a vertical air sorter installed in a conventional plastic waste sorter / collector.

FIG. 9 is a cross-sectional side view showing a horizontal air sorter installed in a conventional plastic waste sorter / collector.

[Explanation of symbols]

1 The first light weight plastic sorting and recovery device 2 Second light weight plastic sorting and collecting device 10 Supply conveyor 11 Rotary valve 20 Vertical air sorter 21 Plastic mixture drop section 22 Non-lightweight plastic drop section 23 Lightweight plastic receiving part 24 upper end 24 25 lower end 25 26 Air intake duct 27 Rotary valve 30 Transportation piping 40 separator 50 Air supply piping 60 blower 70 Exhaust pipe 71 Exhaust control valve 80 Dust collector 90 Deodorizer 100 return piping 101 Return adjustment valve 110 circulation piping 210 supply conveyor 220 Vertical air sorter 221 Plastic Mixing Section 222 Non-lightweight plastic drop part 223 Lightweight plastic receiving part 227 rotary valve 230 Transportation piping 240 separator 250 air supply piping 260 blower 270 Exhaust pipe 300 return piping 301 Return adjustment valve 310 Circulation piping 400 Horizontal air sorter 401 nozzle 402 scraper conveyor 403, 404, 405 bunker 406 exhaust duct 500 bag breaker 510 supply conveyor 520 Horizontal air sorter 521 blow nozzle 523 Lightweight plastic receiving part 524 suction valve 530 Transportation piping 540 separator 530 Transportation piping 540 separator 550 Air supply piping 560 blower 570 exhaust pipe 571 three-way valve 600 bypass piping 610 Circulation piping 700 hand sorting conveyor 800 compression packing machine 900 suction pipe 901 Suction adjustment valve

Claims (8)

[Claims] 1. A device for sorting and recovering lightweight plastics, wherein the lightweight plastics are sucked or blown away with air from a plastics mixture containing the lightweight plastics to be sorted and collected, wherein the plastics mixture is applied to a non-lightweight plastic dropping section described later. A plastic mixture dropping part for dropping, a lightweight plastic receiving part for receiving the lightweight plastic which is sucked or blown away by air together with the air, and a non-lightweight plastic drop for dropping the plastic mixture after the lightweight plastic is selected and removed. An air sorter having a section, a separator for separating air and the lightweight plastic from the lightweight plastic that is sucked or blown away by the air, and a blower that sucks the air separated in the separator, Light weight A transport pipe connecting the stick receiving unit and the separator, a blow pipe connecting the separator and the blower, and an exhaust pipe installed on the downstream side of the blower, the lightweight plastic receiving unit or the A lightweight plastic sorting / collecting device, which is provided with a suction port for sucking air into the transportation pipe. 2. A sorting and collecting apparatus for a lightweight plastic, which collects and sorts the lightweight plastic from a plastic mixture containing the lightweight plastic by sucking or blowing with the air together with the plastic mixture in a non-lightweight plastic dropping section described below. A plastic mixture dropping part for dropping, a lightweight plastic receiving part for receiving the lightweight plastic which is sucked or blown away by air together with the air, and a non-lightweight plastic drop for dropping the plastic mixture after the lightweight plastic is selected and removed. An air sorter having a section, a separator for separating air and the lightweight plastic from the lightweight plastic that is sucked or blown away by the air, and a blower that sucks the air separated in the separator, Light weight A transport pipe connecting the stick receiving part and the separator, a blow pipe connecting the separator and the blower, an exhaust pipe installed on the downstream side of the blower, the exhaust pipe, and the lightweight plastic receiving part or the A light-weight plastic sorting and collecting apparatus, comprising a return pipe connecting a transportation pipe, wherein part or all of the discharged air is supplied to the lightweight plastic receiving portion or the transportation pipe. 3. A circulation pipe connecting the return pipe and the non-lightweight plastic dropping part, wherein a part of the discharged air is supplied to the non-lightweight plastic dropping part. The light weight plastic sorting and collecting device described in 2. 4. The apparatus for sorting and recovering lightweight plastics according to claim 3, wherein an air blocking means is installed vertically below the connecting portion of the circulation pipe of the non-lightweight plastic dropping portion. 5. The light weight plastic sorting and collecting apparatus according to claim 1, wherein the light weight plastic is a film-like plastic. 6. The light weight plastic sorting and collecting apparatus according to claim 1, wherein the light weight plastic is a bottle-shaped plastic. 7. A first light-weight plastic sorting and collecting device according to any one of claims 1 to 4 and a second light-weight plastic sorting and collecting device according to any one of claims 1 to 4. The first lightweight plastic sorting and collecting device is connected to the non-lightweight plastic dropping part and the second lightweight plastic sorting and collecting device is connected to the plastic mixture lowering portion. 8. A first light-weight plastic sorting and collecting apparatus according to claim 5, and a second light-weight plastic sorting and collecting apparatus according to claim 6, wherein the first light-weight plastic sorting and collecting apparatus is not provided. The light-weight plastic dropping part is connected to the plastic mixture lowering part of the second light-weight plastic sorting and collecting device, and the film-like plastic is separated and collected by the separator of the first light-weight plastic sorting and collecting device. The second light-weight plastic sorting and collecting device that separates and collects bottle-shaped plastic in the separator of the light-weight plastic sorting and collecting device.