JP3761832B2 - Waste plastic sorting system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention provides a waste plastic sorting system.ToIn particular, waste plastic sorting system including waste paper and chlorinated plasticToIs preferred.
[0002]
[Prior art]
Light and durable plastic products are used in a wide range of applications, and their production is increasing year by year. As the production volume increases, the amount of waste also increases, which has developed into a recent environmental problem. In order to effectively use finite fossil fuels such as plastic, it is necessary to recycle from used materials.
[0003]
Waste paper, which is used plastic contained in general waste and industrial waste, is generally mixed with waste paper or chlorinated plastic. In other words, on the discharge side, when paper labels are stuck or entangled on the plastic itself, it is difficult to remove it, or it is difficult to identify chlorinated plastic, or waste paper and chlorinated plastic are sorted. Due to factors such as the case of discharging without waste, waste paper and chlorinated plastic are mixed into waste plastic.
[0004]
When such waste plastic is used as a recycling material for incineration, fueling, material recycling, etc., it is necessary to remove waste paper and chlorinated plastic from the waste plastic and collect it. That is, when materials are sorted by a specific gravity sorting method or the like in a state where waste paper is entangled with waste plastic, a chlorinated plastic having a large specific gravity is entangled with the paper, so that the apparent specific gravity is reduced and recovered as a low specific gravity. Therefore, it becomes difficult to properly separate materials according to specific gravity by specific gravity selection processing, resulting in a problem that the quality of the recovered material is lowered. If the selection of the material is insufficient, not only the recycling of the material becomes impossible, but also the incineration and the use as fuel become difficult. If chlorine-based plastics such as vinyl chloride (hereinafter referred to as PVC) are mixed in the combustible material, chlorine gas is generated during incineration and corrodes the incinerator. May react and generate toxic gases.
[0005]
Therefore, as a conventional method for removing chlorinated plastics, as shown in Japanese Patent Application Laid-Open No. 10-58451 (hereinafter referred to as the prior art), coarsely crushed and then dried waste is oscillated. A method has been proposed in which soft waste such as waste paper and film-like plastic is separated from hard waste such as metal and hard plastic by a machine, and chlorine-containing plastic is removed from the hard waste by a separation method using radiation such as infrared rays. .
[0006]
[Problems to be solved by the invention]
However, in the related art, since soft waste such as waste paper and film-like plastic is separated by a swinging sorter, a paper label is affixed to the plastic itself or the waste paper is tangled, etc. In addition, there is a problem that it is difficult to reliably remove the used paper, and that the accuracy in sorting out the chlorine-containing plastic from hard garbage is reduced due to the remaining used paper.
[0007]
  It is an object of the present invention to reliably separate waste paper contained in waste plastic using an inexpensive and small apparatus.RuinPlastic sorting systemTheIt is to provide.
[0008]
[Means for Solving the Problems]
  In order to achieve the above object, a waste plastic sorting system according to the present invention is a crushing apparatus that feeds plastic from which incombustible materials have been removed or waste plastic including waste paper, and crushes the waste plastic so that the particle size is 10 mm or less. Then, these crushed waste plastics are fed and stirred in a screen with a mesh smaller than the waste plastics to be fed, so that these waste plastics are rubbed together to separate waste paper and plastics. With equipment,The dry defibrating apparatus includes a cylindrical member formed in a horizontally long cylindrical shape, and the cylindrical portion.MaterialOn the other hand, the cylindrical screen having a predetermined space and a mesh smaller than the grain of rice, and the waste plastic that is installed with a predetermined space with respect to the screen and is thrown into this space A stirrer that stirs and defibrate the waste paper contained in these and separates them through a screen;An air cyclone for collecting the used paper separated through the screen, and a collecting unit for taking out the plastic from which the used paper has been separated by the stirring tool.The cylindrical member is provided with a waste plastic inlet on the upper surface on one side and a plastic discharge part on the other side surface.On the outer circumference of the defibration rollPlacedTheCorresponding to the feeding blade and the screenAround the defibration rollEquipped with defibration blades arranged side by side, the plastic discharge part can be adjusted to any pressure so as to give resistance to the propulsion of waste plastic stirred between the screen and the stirring tool Equipped with a compression plateIs.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings.
[0011]
First, a first embodiment of the present invention will be described with reference to FIGS.
[0012]
The overall configuration and operation of the waste plastic sorting system of this embodiment will be described with reference to FIG. FIG. 2 is a block configuration and operation flow diagram showing the waste plastic sorting system and sorting method of the first embodiment of the present invention.
[0013]
The waste plastic sorting system 100 includes a rough crushing device 30, a metal sorting device 40, a secondary crushing device 50, a dry specific gravity sorting device 60, a dry defibrating device 1 and a specific gravity sorting device 20. It is configured to flow and be sorted.
[0014]
The waste plastic 80 is mainly made of plastic products and plastic scraps of general waste and industrial waste, and is waste plastic including non-combustible materials such as metal and ceramics and waste paper in addition to plastic. The waste plastic 80 is put into the rough crushing device 30 and roughly crushed, and then put into the metal sorting device 40 to sort, collect and remove metals such as iron and aluminum. The waste plastic 80 from which the metal has been removed in this way is crushed to a particle size suitable for specific gravity sorting by the secondary crushing device 50, and then is put into a vibration type dry specific gravity sorting device 60, which is heavier than the plastic. Incombustibles such as metal and earthenware are removed. The lightweight plastic from which the incombustible material has been removed in this way and the waste plastic including waste paper are put into the dry defibrating apparatus 1 and separated into waste paper and plastic. Separation of this waste paper and plastic is performed by rubbing waste plastics of appropriate particle sizes in the dry defibrating apparatus 1 to defibrate the waste paper contained therein, and the defibrated waste paper and the remaining plastic. Are separated and recovered. The plastic separated in this way is put into the specific gravity sorting device 20 and separated into a specific gravity side plastic and a low specific gravity side plastic.
[0015]
Next, details of each device will be described with reference to FIGS. 3 to 6 and FIG.
[0016]
Details of the rough crushing apparatus 30 will be described with reference to FIG. FIG. 3 is an explanatory diagram of the structure of the rough crusher 30 in FIG.
[0017]
The rough crushing device 30 includes a hopper 31, a rotary blade 32, and a transport device 33. The rotary blade 32 is rotatably disposed at a lower portion in the hopper 31 and is formed with a crushing blade 32b that is distributed in the axial direction outward from the outer periphery of the uniaxial rotor 32a. A screen portion 31 a having a mesh-like gap is formed on the lower surface of the hopper 31. The conveyance device 33 has a conveyance belt and is arranged so as to extend from below the hopper 31 to the conveyance device 44 of the metal sorting device 40 in the next stroke.
[0018]
The waste plastic 80a is put into the hopper 31 as indicated by an arrow 34, and is crushed between the crushing blade 32b of the rotary blade 32 and the screen portion 31a having a mesh-like gap. The waste plastic 80a is circulated and crushed between the crushing blade 32b and the screen portion 31a until it becomes smaller than the mesh size, and the waste plastic 80b smaller than the mesh size of the screen portion 31a becomes the mesh of the screen portion 31a. It is discharged to the outside and conveyed to the next step by a conveying device 33 provided below. The mesh size of the screen portion 31a is suitably 50 mm or less.
[0019]
Details of the metal sorting apparatus 40 will be described with reference to FIG. FIG. 4 is an explanatory view of the structure of the metal sorting apparatus 40 in FIG.
[0020]
The metal sorting device 40 includes a first metal sorting device 40A and a second metal sorting device 40B.
[0021]
The first metal sorting apparatus 40 </ b> A includes an endless belt 41, a roller 42, a permanent magnet 43, and a transport device 44. The endless belt 41 is wound around the four rollers 42 and is rotated in a direction crossing the conveying device 44 so as to be circulated. The endless belt 41 circulates along the lower surface of the permanent magnet 43 disposed inside. The permanent magnets 43 are arranged above the conveying device 44 with a predetermined interval via the endless belt 41 and have a width wider than the width of the conveying device 44. The conveyance device 44 is arranged so as to extend from below the permanent magnet 43 to the supply device 45 of the next second metal sorting device 40B.
[0022]
When the waste plastic 80 c that is roughly crushed and is transported by the transport device 44 is transported below the permanent magnet 43, the iron-based shredded fragment 81 mixed therein is moved to the endless belt 41 by the magnetic force of the permanent magnet 43. When the endless belt 41 is rotated, the endless belt 41 is moved together with the endless belt 41 from the outside of the conveying device 44 to the outside of the permanent magnet 43, and the attracting force by the permanent magnet 43 is released. Then, it is dropped from the endless belt 41 as indicated by an arrow.
[0023]
The second metal sorting device 40B includes a supply device 45, a belt conveyor 46, a rotating drum 47, a non-ferrous metal collection unit 48, and a waste plastic collection unit 49. The supply device 45 supplies the waste plastic 80b conveyed from the conveyance device 44 of the first metal sorting device 40A onto the belt conveyor 46. One side of the belt conveyor 46 is wound around a rotary drum 47 so as to be rotatable. The rotating drum 47 has a rotor in which permanent magnets of N and S poles are alternately arranged on the outer peripheral portion, and rotates a belt conveyor 46 arranged on the outer periphery of the rotating rotor together. .
[0024]
The waste plastic 80 b conveyed from the first metal sorting device 40 </ b> A to the supply device 41 is supplied onto the belt conveyor 46 through the supply device 45 and is transferred to the rotating drum 47 by the rotation of the belt conveyor 46. The non-ferrous metal 81 such as aluminum and copper in the eddy current is generated to pass through the rotating magnetic field generated by the rotating drum 47 provided with the magnet, and is formed by the rotating drum 47 by the magnetic field generated by the eddy current. It receives a repulsive force from the rotating magnetic field and flies in a parabolic shape from the rotating drum 47 in the close contact direction. Further, the waste plastic 80c other than the non-ferrous metal 81 does not generate an eddy current even if it passes through the rotating magnetic field of the rotating drum 47, and therefore does not receive a repulsive force and falls downward from the belt conveyor 46 to the rotating drum 47. To do. Therefore, by providing the non-ferrous metal recovery part 48 in the part of the parabolic locus of the non-ferrous metal 81 and providing the waste plastic recovery part 49 in the part where the waste plastic 80c falls, the non-ferrous metal 81 and other waste plastics 80c are provided. Can be easily selected.
[0025]
The detail of the secondary crushing apparatus 50 is demonstrated using FIG. FIG. 5 is an explanatory view of the structure of the secondary crushing device 50 in FIG.
[0026]
The secondary crushing apparatus 50 includes a hopper 51, a rotary blade 52, and a discharge unit 53. The rotary blade 52 is rotatably disposed at a lower portion in the hopper 51, and is formed with a crushing blade 52b that projects in an axial direction from the outer periphery of the uniaxial rotor 52a. A screen portion 51 a having a mesh-like gap is formed on the lower surface of the hopper 51. The discharge part 53 covers the screen part 51a and extends in the horizontal direction from below to be provided to discharge the waste plastic 80e in the next stroke.
[0027]
Waste plastic 80c conveyed from the metal sorting apparatus 40 is put into the hopper 51 as indicated by an arrow 54, and is crushed between the crushing blade 52b of the rotary blade 52 and the screen portion 51a having a mesh-like gap. The waste plastic 80c is circulated and crushed between the crushing blade 52b and the screen portion 51a until it becomes smaller than the mesh size, and the waste plastic 80d having a size smaller than the mesh size of the screen portion 51a becomes the mesh of the screen portion 51a. And is discharged from the discharge portion 53 to the next step as indicated by an arrow 55. The screen portion 51a has a mesh size of 10 mm or less, and is preferably crushed to waste plastic 80d that is 10 mm or less and is adjusted to a grain size of about rice grains.
[0028]
Details of the dry specific gravity sorting device 60 will be described with reference to FIG. FIG. 6 is an explanatory view of the structure of the dry specific gravity sorting device 60 in FIG.
[0029]
The dry specific gravity sorting device 60 includes a hopper 61, a vibrating net 62, a base frame 63, a link mechanism 64, a seat portion 65, and a blower 66. The tip supply port of the hopper 61 is located above the central portion of the vibrating net 62. The vibration network 62 having a large number of holes is disposed at an inclination and is supported by the base frame 63 through the link mechanism 64 so as to be capable of vibrating. The seat portion 65 that has a bellows structure on the entire periphery and can be expanded and contracted is provided so as to form an air flow path between the base frame 63 on the discharge side of the blower 66 and the vibrating net 62.
[0030]
The waste plastic 80d, which has been arranged to some extent from the secondary crusher 50 to a suitable particle size, falls from the hopper 61 onto the center of the vibrating net 62 as indicated by the arrow 69 and is deposited. During the sorting operation, the vibrating net 62 is vibrated in an inclined direction as indicated by an arrow 67, and an air flow is blown out from the inside of the vibrating net 62 as indicated by an arrow 68 from the blower 66. For this reason, the non-combustible material 82 such as metal and ceramics having a large specific gravity in the waste plastic 80d deposited on the vibration net 62 is carried upward along the inclined surface of the vibration net 62 and is located on the upper end side of the vibration net 62. Recovered from. In addition, the waste plastic 80f having a small specific gravity in the waste plastic 80d deposited on the vibration net 62 exhibits a behavior of being lifted from the vibration net 62 by an air flow, and as a result, behaves so as to slide down on the waste plastic 80e having a large specific gravity. Then, it is recovered from the lower end side of the vibrating net 62.
[0031]
Details of the dry defibrating apparatus 1 and the specific gravity sorting apparatus 20 will be described with reference to FIG. FIG. 1 is a configuration diagram of the dry defibrating apparatus 1 and the specific gravity sorting apparatus 20 in FIG.
[0032]
The dry defibrating apparatus 1 is a cylindrical screen that has a cylindrical member 2 and a mesh (preferably about 2 to 4 mm) smaller than rice grains and is installed with a predetermined space with respect to the cylindrical member 2. 3 and a stirrer 19 which is installed with a predetermined space with respect to the screen 3 and stirs the waste plastic put into the space to defibrate the waste paper contained therein and separate it through the screen 3 And an air cyclone 10 for collecting the used paper separated through the screen 3 and a collecting unit 17 for taking out the plastic from which the used paper has been separated by the stirring tool 19.
[0033]
The dry defibrating apparatus 1 of the present embodiment has the same structure as an existing rice mill as described in, for example, Japanese Patent Application Laid-Open No. 7-124485. Therefore, it is possible to divert the existing mass-produced rice mills as the dry defibrating apparatus 1, whereby the dry defibrating apparatus 1 can be easily obtained.
[0034]
The tubular member 2 is formed in a horizontally long cylindrical shape and constitutes an outer portion of the dry defibrating apparatus 1. A waste plastic inlet 8 is provided on the upper surface of one side of the cylindrical member 2, a plastic discharge portion 17 is provided on the other side surface of the cylindrical member 2, and a discharge port is provided on the lower surface of the cylindrical member 2. 9 is provided.
[0035]
Specifically, the stirrer 19 is constituted by a defibrating roll 6 provided with a feed blade 4 and a defibrating blade 5. The feed blade 4 and the stirring blade 5 are juxtaposed on the outer periphery of the defibrating roll 6, the feed blade 4 is disposed below the inlet 8, and the stirring blade 5 is disposed corresponding to the screen 3. The stirring blades 5 are formed on the inside of the screen 3 with substantially the same width, and a plurality of stirring blades 5 are installed on the outer periphery of the defibrating roll 6. The defibrating roll 6 is connected via a belt so as to rotate in conjunction with the drive of the motor 7.
[0036]
Waste plastic introduced from the inlet 8 reaches the outer periphery of the feed blade 4, and propulsive force is applied in the direction of the stirring blade 5 by the rotation of the feed blade 4 accompanying the rotation of the defibration roll 6, and the screen 3 and the defibration roll. It is sent between 6 and. The waste plastics fed into this space are stirred by the stirring blade 5 rotating together with the defibrating roll 6 and rubbed against each other, or rubbed against the stirring blade 5 and the screen 3, and the waste paper contained in these is removed. Defibrated. The fibrillated waste paper is discharged to the space between the screen 3 and the cylindrical member 2 through the screen 3 by the stirring force of the stirring blade 5 and the suction force of the air cyclone 10. In other words, waste paper whose fiber length is shorter than that of plastic and whose physical properties such as tensile strength and elongation are low breaks into a fiber and is discharged through the mesh of the screen 3.
[0037]
A fiber discharge port 9 is provided below the tubular member 2 facing the screen 3, and an air cyclone 10 is connected to the fiber discharge port 9. Accordingly, the fibrous waste paper discharged through the screen 3 is discharged to the discharge port 9 and further sucked into the air cyclone 10. The used paper is separated from the air by the air cyclone 10 and collected in the fiber collection box 11.
[0038]
The plastic discharge portion 17 provided on the other side of the outer cylinder 2 includes a compression plate 12 and an outlet 13. The compression plate 12 is provided so as to be adjustable to an arbitrary pressure so as to give resistance to the propulsion of the waste plastic stirred between the screen 3 and the stirring tool 19. By imparting resistance to the propulsion of the waste plastic in this way, the waste plastics can be sufficiently rubbed together. Then, the plastic from which the used paper has been separated is discharged to the outlet 13 while receiving the resistance of the compression plate 12, and further supplied to the input device 29 and collected.
[0039]
The specific gravity sorting device 20 includes a charging device 29, a water tank 23 provided with a charging port 22 therein, a pump 24 for sucking water, plastics and the like of the charging port 22 into the liquid cyclone 21, and a liquid cyclone 21 which is a specific gravity sorting unit. And a dehydrator 25 for draining the plastic 84 having a small specific gravity selected by the liquid cyclone 21 and a dehydrator 27 for draining the plastic 85 having a large specific gravity. The plastic 84 discharged from the dehydrator 25 is collected in the specific gravity side collection box 26, and the plastic 85 discharged from the dehydrator 27 is collected in the specific gravity side collection box 28.
[0040]
The plastic supplied to the input device 29 is input to the input port 22 in the water tank 23, sucked up together with water by the pump 24, and supplied to the liquid cyclone 21. The water containing the plastic supplied into the cylindrical container of the hydrocyclone 21 becomes a swirl flow and is discharged from the two systems of the lower discharge port 21a and the upper discharge port 21b. At this time, the plastic supplied to the hydrocyclone 21 is given a centrifugal force by the swirling flow of water, and a plastic having a large specific gravity such as PVC (specific gravity 1.2 to 1.4) or polystyrene (specific gravity 1.1) Centrifugal force acts so that it is discharged from the lower discharge port 21a along the inner wall surface of the cylindrical container, polyolefin plastic such as polyethylene and polypropylene (specific gravity 0.9 to 0.98), ABS resin (specific gravity 1.05), etc. The plastic having a small specific gravity is reduced in centrifugal force, converges at the center of the cylindrical container, and is discharged from the upper discharge port 21b.
[0041]
The plastic 84 discharged from the upper discharge port 21b is drained by the dehydrator 25 and is collected in the small specific gravity collection box 26. The plastic 85 discharged from the lower discharge port 21a is drained by the dehydrator 27 and is recovered in the specific-side recovery box 28. The water removed by the dehydrators 25 and 26 is returned to the water tank 23 for circulation.
[0042]
According to the present embodiment, the waste paper, which is a factor that lowers the specific gravity sorting performance of the plastic, is surely removed and the specific gravity sorting process is performed, so that the plastic from which the waste paper has been removed can be properly sorted, and high-quality useful plastic can be recovered. Can be planned. In particular, high quality useful plastics can be recovered by collecting them separately into non-combustible materials including chlorinated plastics such as PVC and non-chlorine flammable plastics. As a result, the recovered material can be easily applied to incineration or recycled raw materials.
[0043]
In addition, since a dry defibrating method is used that mechanically defibrates by the action of the drive unit that imparts the defibrating action of waste paper, compared to the wet method of defibrating while immersed in the solution and stirring, There is no need for management, replenishment, or waste liquid treatment, and it is possible to sort with inexpensive and small-scale equipment, and the sorting cost can be made easy.
[0044]
Next, a second embodiment of the present invention will be described with reference to FIG. The second embodiment is a waste plastic sorting system and a sorting method thereof in which a wind sorting device 70 is combined between the dry defibrating device 1 and the specific gravity sorting device 20 shown in the first embodiment.
[0045]
The wind power sorting apparatus 70 is configured to include a wind tunnel 72 provided with an inlet 71 and an air cyclone 73 that sucks up the plastic of the wind tunnel 72. As the suction fan of the air cyclone 73 is driven, air is sucked into the air cyclone 73 from the wind tunnel 72, so that an upward flow of air is generated inside the wind tunnel 72.
[0046]
The processing flow in the second embodiment of waste plastic crushed to an appropriate particle size will be described. The waste plastic that has been input to the dry defibrating apparatus 1 from the input device 18 is defibrated and the fibrous used paper is recovered in the fiber recovery box 11. The plastic from which the used paper has been removed is discharged from the take-out port 13 and is put into the charging device 29, and is charged into the charging port 71 of the wind power sorting device 70 by the charging device 29 and supplied into the wind tunnel 72.
[0047]
The plastic supplied to the wind tunnel 72 is collected in a lightweight collection box 74 by a film-like lightweight object 86 riding on the upward flow and sucked into the air cyclone 73. Sheets and plate-like thick and heavy objects are not attracted by the upward flow, fall in the direction of gravity, are discharged from below the wind tunnel 72, and are input to the input device 29. Especially for chlorine-containing plastic products such as PVC contained in general waste, film-like products such as food packaging films are often used. Therefore, it is necessary to remove the film.
[0048]
The plastics thrown into the throwing device 29 are supplied to the specific gravity sorting device 20 by the throwing device 29, and are collected by the specific gravity sorting device 20 separately into a plastic 85 having a high specific gravity and a plastic 84 having a low specific gravity.
[0049]
In the specific gravity sorting apparatus 20, when there are different shapes of plastic such as a thin film and a thick one such as a film, the behavior at the time of sorting is different, which causes a reduction in sorting performance. In addition, thin plastic film-like materials may be crushed by processing such as crushing, making it easier to enclose air in the crushed pieces, and the sorting performance will be reduced because the apparent specific gravity of the plastic changes during specific gravity sorting. To do. Therefore, after removing the film-like plastic with the wind power sorter 70 as in the present embodiment, the sheet and plate-like heavy objects are sorted with the specific gravity sorter 20 so that a more appropriate specific gravity can be selected.
[0050]
Next, a third embodiment of the present invention will be described with reference to FIG. The third embodiment is a waste plastic sorting system and a sorting method thereof that perform both specific gravity sorting of light and heavy items sorted by the wind power sorter 20 shown in the second embodiment.
[0051]
The waste plastic sorting system 100 includes a dry defibrating device 1, a wind power sorting device 70 that collects and collects plastics collected from the dry defibrating device 1 into light and heavy materials, and a light weight for performing a specific gravity sorting process for light materials. The specific gravity sorting device for goods 20A and the specific gravity sorting device for heavy goods 20B for carrying out a specific gravity sorting process for heavy goods are provided.
[0052]
The processing flow in the third embodiment of waste plastic crushed to an appropriate particle size will be described. The waste plastic supplied to the dry defibrating apparatus 1 is subjected to a defibrating process so that fibrous waste paper is recovered in the fiber recovery box 11 and plastic from which the waste paper has been removed is recovered from the outlet 13. The collected plastic is collected by the wind power sorter 70 into a film-like lightweight article and a sheet or plate-like heavy article.
[0053]
Lightweight items collected by the wind power sorting device 70 are sorted and collected by the light weight specific gravity sorting device 20A set to a sorting condition suitable for the light weight materials into a low specific gravity material 87 and a high specific gravity material 88. The heavy objects collected by the wind power sorting apparatus 70 are sorted and collected by the heavy gravity specific gravity sorting apparatus 20B set to the sorting conditions suitable for the heavy goods into the low specific gravity 84 and the high specific gravity 85.
[0054]
According to the third embodiment, the plastic recovery rate can be improved by processing the lightweight and heavy plastics collected from the wind power sorting device 70 with the specific gravity sorting devices 20A and 20B, respectively. The amount of waste can be reduced.
[0055]
Next, a fourth embodiment of the present invention will be described with reference to FIG. The fourth embodiment is a waste plastic sorting system and a sorting method for operating the dry defibrating apparatus 1 described in the first to third embodiments by batch processing. The batch processing in the fourth embodiment performs sorting processing by controlling the driving of the input device 18.
[0056]
When the input device 18 is turned on (step 90), a predetermined amount of waste plastic 80 crushed to an appropriate particle size is input from the input device 18 to the dry defibrating device 1 (step 91). When a predetermined amount (for example, detected by a charging time or a charging weight) of waste plastic is charged from the charging device 18, the charging device 18 is turned off and the operation is stopped (step 92). When the input device 18 is stopped, it is determined whether or not the defibrating process of the dry defibrating device 1 has been completed (step 93). If the defibrating process has not been completed, the input device 18 remains off. When the defibrating process is completed, the process returns to step 90, the input device 18 is turned on, and the waste plastic 80 is newly input into the dry defibrating device 1. The operation of the charging device 18 is controlled so that this series of operations is repeated.
[0057]
According to the fourth embodiment, not only a dry defibrating apparatus capable of continuous operation but also a dry defibrating apparatus requiring batch operation can be applied to a waste plastic sorting system and its sorting method.
[0058]
Each embodiment described above is constructed as a sorting equipment and sorting method combined with existing sorting equipment and sorting methods for the purpose of incineration, reuse, volume reduction, etc. of waste from general waste and industrial waste. Also good.
[0059]
【The invention's effect】
  As is clear from the description of each of the above embodiments, according to the present invention, it is possible to reliably separate waste paper contained in waste plastic using an inexpensive and small-sized apparatus.RuinPlastic sorting systemTheObtainable.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a defibrating device and a specific gravity sorting device showing a waste plastic sorting system of a first embodiment of the present invention.
FIG. 2 is a block configuration and an operation flowchart showing a waste plastic sorting system and a sorting method thereof according to the first embodiment of the present invention.
FIG. 3 is an explanatory diagram of the structure of the rough crushing apparatus in FIG. 2;
4 is an explanatory diagram of the structure of the metal sorting apparatus in FIG. 2;
FIG. 5 is an explanatory diagram of the structure of the secondary crushing device in FIG. 2;
6 is a structural explanatory diagram of the dry specific gravity sorting apparatus in FIG. 2. FIG.
FIG. 7 is a configuration diagram of a defibrating device, a wind power sorting device, and a specific gravity sorting device showing a waste plastic sorting system of a second embodiment of the present invention.
FIG. 8 is a block configuration and operation flow diagram showing a waste plastic sorting system and sorting method according to a third embodiment of the present invention.
FIG. 9 is an operation flowchart of the waste plastic sorting system according to the fourth embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Dry defibrating apparatus, 2 ... Cylindrical member, 3 ... Screen, 4 ... Feeding blade, 5 ... Stirring blade, 6 ... Defibration roll, 7 ... Motor, 8 ... Input port, 9 ... Discharge port, 10 ... Air Cyclone, 12 ... compression plate, 17 ... plastic discharge part, 19 ... stirring device, 20 ... specific gravity sorting device, 20A ... specific gravity sorting device for heavy objects, 20B ... specific gravity sorting device for light weight materials, 21 ... liquid cyclone, 23 ... water tank 25 ... dehydrator, 27 ... dehydrator, 30 ... coarse crushing device, 40 ... metal sorting device, 50 ... secondary crushing device, 60 ... dry specific gravity sorting device, 70 ... wind sorting device, 72 ... wind tunnel, 73 ... air Cyclone, 80 ... waste plastic, 100 ... waste plastic sorting system.

Claims (1)

A crushing device that crushes the waste plastic including waste plastics and waste paper from which incombustible materials have been removed, and crushes the waste plastic so that the particle size is 10 mm or less,
A dry-type defibrating device in which waste paper that has been crushed is charged and agitated in a screen that has a mesh smaller than the waste plastic that is thrown in to separate the waste paper and plastic by rubbing them together. With
The dry type defibrating device includes a cylindrical member formed in a horizontally long cylindrical shape, a tubular of the screen with a small mesh than rice grains while being disposed with a predetermined space for the the tubular member A stirrer that is installed with a predetermined space with respect to the screen, stirs the waste plastic that has been thrown into the space, defibrates the waste paper contained in the plastic, and separates it through the screen; An air cyclone that collects the separated used paper, and a collection unit that takes out the plastic from which the used paper has been separated by the stirring tool ,
The cylindrical member is provided with a waste plastic inlet on the upper surface on one side and a plastic discharge part on the other side surface,
The mixing tool has a feed blade disposed on the outer periphery of the fibrillating roll inlet lower, provided side by side and solutions繊羽roots disposed on the outer periphery of the fibrillating roll corresponding to the screen,
The plastic discharge part is provided with a compression plate provided with a compression plate that can be adjusted to an arbitrary pressure so as to give resistance to propulsion of the waste plastic stirred between the screen and the stirring tool. system.

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