JP5506501B2 - Aluminum foil / resin separation method and separation device - Google Patents

Description

  The present invention relates to an aluminum foil / resin separation method for separating and recovering aluminum foil and synthetic resin by crushing wastes such as PTP, packaging containers, CDs and DVDs containing aluminum foil, and a separation apparatus therefor. In this specification, the aluminum foil is a concept including an aluminum foil, an aluminum film, and an aluminum vapor deposition film.

  In recent years, packaging containers including aluminum foil for packaging capsules, tablets, PTP, foodstuffs, and the like have been produced in very large quantities, and almost all of them have been discarded after use.

  Currently, such packaging containers such as PTP containing aluminum foil are difficult to separate from aluminum foil and synthetic resin, so they are poorly recyclable and are mostly used for landfill or incineration as general waste. is there.

  However, incineration of packaging waste such as PTP containing aluminum foil incinerates synthetic resin such as PVC, so there is concern about the generation of toxic gases, and the aluminum foil is likely to remain unburned. Establishment of recycling technology for separating and collecting resin is desired.

  Therefore, conventionally, for an aluminum-containing paper container using an aluminum film such as a beverage paper pack, after pulverizing and mixing it, a technique for producing a paper-aluminum-resin mixed pellet and using it as a molding material is described below. It is proposed in Patent Document 1 and the like.

JP 2006-347031 A

  However, the above-mentioned technology is merely a method of pulverizing and mixing an aluminum-containing paper container and then pelletizing the paper-aluminum-resin mixture. Even if the molded product is molded using the pellet as a molding material, Since the product is a paper-aluminum-resin mixture, the strength may be insufficient, and the texture, color, etc. of the product are poor in quality, and there are very few applications that can be effectively reused.

  For this reason, there is a strong demand for a recycling technique for continuously separating and recovering aluminum foil and synthetic resin from waste containing aluminum foil.

  This invention solves the above-mentioned subject, the aluminum foil and the resin separation method which can isolate | separate and collect aluminum foil and synthetic resin efficiently from the synthetic resin waste containing aluminum foil, and its isolation | separation An object is to provide an apparatus.

  In the method for separating aluminum foil and resin according to the present invention, a synthetic resin waste having an aluminum foil adhered to a synthetic resin is put into a separation chamber in a casing, and a rotor with a blade is rotated in the separation chamber. In the aluminum foil / resin separation method for separating and recovering the synthetic resin, hot air is blown into the separation chamber, and the rotor is rotationally driven while heating the room temperature from about 80 ° C to about 100 ° C. The aluminum foil adhered to the synthetic resin waste is separated from the synthetic resin while being crushed, and the crushed and separated aluminum foil is sent to the aluminum recovery chamber through the lower porous bottom plate of the separation chamber, while the synthetic resin is fed to the rotor. The aluminum foil is recovered from the aluminum recovery chamber, and the synthetic resin is recovered from the resin recovery chamber.

  According to this invention, when the synthetic resin waste such as PTP charged into the separation chamber is heated to about 80 ° C. to about 100 ° C. by hot air, the aluminum foil shrinks and the synthetic resin softens. Further, the aluminum foil is separated from the synthetic resin and crushed by the stirring action by the rotation of the bladed rotor. This crushed aluminum foil enters the aluminum recovery chamber through the perforated bottom plate and is recovered. Since the synthetic resin is recovered from the resin recovery chamber, the synthetic resin waste is efficiently separated and recovered while being continuously put into the casing. be able to.

  Here, it is preferable that hot air for blowing the hot air is blown into the separation chamber in the casing in the rotation direction of the rotor and the tangential direction of the outer periphery of the rotor, and steam is supplied. Thereby, the synthetic resin waste in the separation chamber is well heated and stirred. In addition, the supply of steam increases the humidity in the separation chamber, suppresses the generation of static electricity that tends to occur in synthetic resin waste, eliminates adhesion of aluminum foil and synthetic resin due to static electricity, and separates aluminum foil and synthetic resin. Can be promoted.

On the other hand, the aluminum foil / resin separation device according to the present invention, the synthetic resin waste having the aluminum foil attached to the synthetic resin is put into a separation chamber in the casing, and a rotor with a blade is rotated in the separation chamber, In an aluminum foil / resin separator that separates and collects aluminum foil and synthetic resin,
A waste input port for introducing synthetic resin waste is provided at the upper end of the casing, while a hot air supply port for blowing hot air to heat the inside of the casing is provided in the casing.
The separation chamber in the casing is rotatably provided with a rotor having a structure in which a plurality of movable blades are pivotally supported on a disk, and a resin recovery chamber is provided on the tip side of the separation chamber. A porous bottom plate is provided at the bottom of the chamber,
A plurality of fixed blades are erected on the porous bottom plate, and the fixed blades are provided with a tapered surface for sending synthetic resin waste in the separation chamber from the end portion to the tip portion,
While an aluminum recovery chamber is provided below the porous bottom plate, a resin discharge port for recovering the separated synthetic resin is provided on the bottom plate of the resin recovery chamber,
The synthetic resin waste thrown into the separation chamber is heated with hot air, and the aluminum foil on the synthetic resin waste is separated and crushed by the rotation of the movable blade of the rotor, and the aluminum foil is recovered from the aluminum recovery chamber. The synthetic resin is recovered from the resin recovery chamber.

  According to the present invention, the synthetic resin waste such as PTP charged in the separation chamber is heated by hot air, and the aluminum foil shrinks dusty by heating, while the synthetic resin softens and expands by heating. The aluminum foil is separated from the synthetic resin and crushed by the stirring action of the shaped bottom plate, rotor movable blade, and fixed blade, the aluminum foil is recovered from the aluminum recovery chamber through the porous bottom plate, and the synthetic resin is recovered from the resin recovery chamber. , Can be separated and recovered efficiently.

  Here, it is preferable that a serrated bottom plate having a sawtooth on the surface thereof is provided adjacent to the porous bottom plate at the bottom of the separation chamber, and a plurality of fixed blades are erected on the sawtooth bottom plate. According to the present invention, by providing a saw-toothed bottom plate with a fixed blade at the bottom of the separation chamber, the synthetic resin waste can be further efficiently agitated to separate the aluminum foil from the synthetic resin.

  The casing is preferably provided with a steam supply port for supplying steam into the separation chamber. According to the present invention, the humidity in the separation chamber increases due to the supply of steam, suppresses the generation of static electricity that is likely to occur in synthetic resin waste, eliminates adhesion of aluminum foil and synthetic resin due to static electricity, and combines with aluminum foil. Separation of the resin can be promoted.

  The aluminum recovery chamber is preferably provided with an exhaust port for exhausting and a discharge conveyor for taking out the aluminum foil. According to this invention, the crushed and separated aluminum foil can be efficiently taken out from the casing.

  According to the aluminum foil / resin separation method and the separation apparatus of the present invention, the aluminum foil and the synthetic resin can be separated and recovered continuously and efficiently from the synthetic resin waste to which the aluminum foil is adhered.

1 is a front view of an aluminum foil / resin separation device showing an embodiment of the present invention. It is a left view of the aluminum foil / resin separator. FIG. 3 is an enlarged sectional view taken along the line III-III in FIG. 2. It is IV-IV expanded sectional drawing of FIG. FIG. 5 is an enlarged V-V sectional view of FIG. 2. (a) is a developed plan view of the bottom plate in the casing, (b) is a bb sectional view thereof, (c) is a cc sectional view thereof, and (d) is a partial plan view of the porous bottom plate. It is a left view with a partial cross section which shows the rotor in a casing. It is VIII-VIII sectional drawing of FIG. FIG. 4 is a left side view of a separation apparatus showing hot air supply, steam supply, waste input, resin discharge, aluminum discharge position, etc. during operation.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 9 show a separation apparatus for carrying out the aluminum foil / resin separation method of the present invention. In general, this separation apparatus is configured to put a synthetic resin waste having an aluminum foil attached to the surface of a synthetic resin such as PTP into the separation chamber 2 in the casing 1, and a rotor with a movable blade 19 in the separation chamber 2. 16 is rotated to separate and collect the aluminum foil and the synthetic resin.

  As shown in FIGS. 1 and 2, the casing 1 is formed in a substantially rectangular parallelepiped box shape, and the bottom thereof is formed in a substantially triangular shape on the left side in FIG. 2, that is, on the waste input side. The bottom of the resin discharge side portion is formed in a semi-cylindrical shape. In addition, a separation chamber 2 is formed inside the casing 1, and a rotor 16 with a movable blade 19 is disposed horizontally in the left-right direction in FIG. Provided possible.

  As shown in FIG. 3, a semicylindrical sawtooth bottom plate 12 is provided at the bottom of the separation chamber 2 on the left side of the casing 1 in FIG. 2, and a semicylindrical porous plate is provided on the right side of the sawtooth bottom plate 12. A bottom plate 13 is provided as shown in FIG. 4, and an aluminum recovery chamber 3 is formed below the serrated bottom plate 12 and the porous bottom plate 13. The serrated bottom plate 12 has a triangular prism-shaped protrusion as shown in FIG. 6 arranged on the inner side of a semi-cylindrical metal plate in the axial direction (left-right direction in FIG. 2). The semi-cylindrical bottom plates are arranged side by side in the circumferential direction so that the cross section has a sawtooth shape. That is, saw blades are arranged in the circumferential direction of the separation chamber 2, which is the rotation direction of the rotor 16, and the synthetic resin waste is rubbed on the serrated bottom plate 12 as the rotor 16 rotates, so that the aluminum foil is separated from the synthetic resin. It has become.

  Further, as shown in FIGS. 3 and 6, on the upper surface (inner side surface) of the serrated bottom plate 12, for example, five fixed blades 15 are projected while shifting their positions in the circumferential direction and the axial direction. Since these fixed blades 15 are inserted between the movable blades 19 of the rotor 16 described later, they are located along a vertical plane perpendicular to the axial direction of the rotor 16. As shown in FIG. 6, the end surface of the fixed blade 15 facing the tip surface of the movable blade 19 during rotation is formed as an inclined taper surface 15a, and the taper surface 15a acts to respond to the rotation of the rotor 16. The stirred synthetic resin waste is sent to the right side (discharge side) of FIG.

  A porous bottom plate 13 is provided as a semi-cylindrical bottom plate on the right side, that is, on the discharge side of the saw-toothed bottom plate 12 as a semi-cylindrical bottom plate with a double area of the saw-toothed bottom plate 12. As shown in FIG. 6, similarly to the sawtooth bottom plate 12, the fixed blade 15 is also provided on the upper surface of the porous bottom plate 13 while shifting its position in the circumferential direction and the axial direction. A large number of holes formed in the porous bottom plate 13 are formed in such a size that the synthetic resin cannot pass through the aluminum foil separated from the synthetic resin waste and passed through the aluminum foil. Then, the crushed aluminum foil is passed through the porous bottom plate 13 and sent to the aluminum recovery chamber 3 below.

  On the other hand, a waste input port 8 for supplying synthetic resin waste with an aluminum foil such as PTP attached is provided at the upper part of the input side (left end portion in FIG. 2) of the casing 1 by connecting a hopper or the like. ing. Furthermore, the hot air supply port 10 which blows in hot air in order to heat the temperature in a casing is provided in the upper part of the casing 1.

  As shown in FIG. 1, the hot air supply port 10 is formed to be inclined on the side wall portion of the casing 1 so as to blow hot air in the tangential direction of the disk 18 of the rotor 16 and in the rotational direction of the rotor 16. Hot air is blown into the separation chamber 2 through the duct 10 a connected to the hot air supply port 10 toward the rotation direction of the outer peripheral portion of the rotor 16. Further, the hot air supply port 10 is divided into three portions at the upper part of the casing 1, is formed in an elongated shape like a slit, and is provided so as to supply hot air to the entire separation chamber 2.

  Further, a steam supply port 11 is provided in the upper part of the casing 1 adjacent to the hot air supply port 10 for supplying steam into the separation chamber 2. Similar to the hot air supply port 10, these steam supply ports 11 are also formed to be inclined on the side wall portion of the casing 1 toward the tangential direction of the outer periphery of the disk 18 of the rotor 16. Steam is blown into the separation chamber 2 along the rotational direction of the rotor 16 through the connected duct 11a.

  Further, as shown in FIG. 2, a resin recovery chamber 4 is formed in the casing 1 so as to communicate with the right side (opposite side) of the separation chamber 2. The resin collection chamber 4 is a portion for collecting the synthetic resin after the aluminum foil is separated from the synthetic resin waste in the separation chamber 2, and a semi-cylindrical bottom plate 14 is a bottom portion of the resin collection chamber 4 as shown in FIG. Is provided. Furthermore, as shown in FIG. 6, a plurality of fixed blades 15 are also provided on the upper surface of the bottom plate 14 of the resin recovery chamber 4 so as to shift their positions in the circumferential direction and the axial direction, similarly to the porous bottom plate 13. Yes.

  As shown in FIG. 6, the fixed blade 15 projecting from the bottom plate 14 of the separation chamber 2 and the resin recovery chamber 4 is disposed at a position along the spiral, and the synthetic resin waste is generated by the rotation of the movable blade 19 of the rotor 16. 1 rotates in the counterclockwise direction in FIG. 1, the waste is gradually sent from the input position of the separation chamber 2 in the casing 1 to the discharge side of the resin recovery chamber 4 (from the left side to the right side in FIG. 2). Further, a resin discharge port 6 is formed in the bottom plate 14 of the resin recovery chamber 4, and synthetic resin waste is discharged and recovered through a discharge duct connected to the resin discharge port 6.

  As shown in FIG. 7, the rotor 16 is disposed horizontally from the separation chamber 2 in the casing 1 to the resin recovery chamber 4. The rotor 16 has a structure that is rotationally driven by a drive motor (not shown) in the counterclockwise direction of FIG. 1 about a rotating shaft 17 that is horizontally supported. As shown in FIGS. 7 and 8, the rotor 16 has a large number of disks 18 mounted on a rotating shaft 17 that is horizontally supported at intervals slightly wider than the thickness of the movable blade 19. In the front of each disk 18, for example, four movable blades 19 are pivotally supported by a pivot 19 a at intervals of 90 °, and the movable blades 19 of the disk 18 are rotated by centrifugal force as the rotor 16 rotates. Rotate to swing outward.

  An aluminum recovery chamber 3 is provided below the separation chamber 2 in the casing 1, that is, below the serrated bottom plate 12 and the porous bottom plate 13. As shown in FIG. 1, the aluminum collection chamber 3 is formed with a bottom having an acute angle when viewed from the front, and a discharge conveyor 5 is disposed horizontally along the bottom. An aluminum discharge port 7 is formed at the tip of the discharge conveyor 5, and the aluminum foil that has entered the aluminum recovery chamber 3 is collected by the discharge conveyor 5 at the aluminum discharge port 7. A screw conveyor is used as the discharge conveyor 5 and is rotated by a drive motor (not shown). As shown in FIGS. 1 and 2, an exhaust port 9 is provided in the upper side wall of the discharge conveyor 5, and air in the casing 1 is discharged from the exhaust port 9 through a filter.

  Next, an aluminum foil / resin separation method performed using the aluminum foil / resin separation apparatus having the above configuration will be described.

  In the separation device, a drive motor (not shown) is activated to rotate the rotor 16 at a speed of about 500 to 750 rpm. The rotation speed of the rotor 16 is increased when the thickness of the synthetic resin waste with aluminum foil to be input is thick, and is decreased when the thickness of the synthetic resin waste is thin. Examples of the synthetic resin waste with aluminum foil include PTP packaging waste, packaging sheet with an aluminum film attached, CD, DVD, and the like.

  The rotor 16 rotates in the direction shown by the arrow in FIG. 1, hot air is blown into the separation chamber 2 of the casing 1 from the hot air supply port 10, and steam is blown from the steam supply port 11. By blowing the hot air, the temperature and the air volume of the hot air are adjusted so that the temperature inside the separation chamber 2 is about 80 ° C. to about 100 ° C. Depending on the material, it is adjusted in a range from about 80 ° C. to about 100 ° C. so that the separation of the aluminum foil is promoted. That is, the aluminum foil of the synthetic resin waste with aluminum foil that is put into the separation chamber 2 of the casing 1 shrinks and shrinks, and the synthetic resin extends, so that the aluminum foil is separated from the synthetic resin. The room temperature is adjusted in the range of about 80 ° C. to about 100 ° C.

  When the temperature in the separation chamber 2 is less than about 80 ° C., the aluminum foil shrinks little and the synthetic resin softens and stretches little, so the synthetic resin waste is crushed with the aluminum foil attached, and the aluminum foil Separation becomes difficult. On the other hand, if the temperature in the separation chamber 2 exceeds about 100 ° C., the softening of the synthetic resin becomes excessive and stickiness occurs, making it difficult to separate the aluminum foil.

  Steam is blown into the separation chamber 2 from the steam supply port 11 so that the humidity in the separation chamber 2 is about 60%. As a result, the humidity in the separation chamber 2 rises to prevent the generation of static electricity that is likely to occur in the separation chamber 2, and the aluminum foil and the synthetic resin waste are prevented from adhering due to static electricity.

  As shown in FIGS. 1 and 9, the synthetic resin waste with aluminum foil such as PTP is continuously fed from the waste loading port 8, and the thrown synthetic resin waste is tangent to the outer peripheral portion of the rotor 16. Into the separation chamber 2 in the direction and in the direction of rotation. At this time, since the synthetic resin waste is thrown in the same direction as the hot air is blown, it is processed while rotating together with the rotor 16 without being disturbed in the separation chamber 2, and the inside of the separation chamber 2 in FIG. Gradually moving from the left side to the right side, the aluminum foil is separated from the synthetic resin waste.

  That is, as shown in FIG. 9, the synthetic resin waste such as PTP charged into the separation chamber 2 from the waste inlet 8 is first heated to about 80 ° C. to about 100 ° C. with hot air in the room, 2 enters the portion of the serrated bottom plate 12 and is stirred by the rotation of the movable blade 19 of the rotor 16.

  At this time, the synthetic resin waste with heated aluminum foil is stretched by softening the synthetic resin as a base by heat, while the aluminum foil attached to the surface is heated and shrinks finely. In this state, the synthetic resin waste is struck on the movable blade 19 and the fixed blade 15 and further rubbed on the sawtooth bottom plate 12, whereby the aluminum foil is efficiently separated from the synthetic resin. The separated aluminum foil and the synthetic resin are gradually sent to the porous bottom plate 13 side in the separation chamber 2, that is, the right side in FIG. 9 by the rotation of the rotor 16 and the action of the tapered surface 15 a of the fixed blade 15.

  The aluminum foil and the synthetic resin that have reached the position of the porous bottom plate 13 in the separation chamber 2 are also struck and agitated on the movable blade 19 and the fixed blade 15 along with the rotation of the rotor 16 in this part. Is finely crushed. The finely crushed aluminum foil passes through the porous bottom plate 13 and enters the lower aluminum recovery chamber 3. And the aluminum foil which entered the aluminum collection | recovery chamber 3 is conveyed to the aluminum discharge port 7 with the discharge conveyor 5 of the bottom part, is discharged | emitted and collect | recovered.

  On the other hand, since the synthetic resin is heated and softened, it is not crushed and is gradually sent to the right side of FIG. 9, that is, the discharge side by the action of the tapered surface 15 a of the fixed blade 15 as the rotor 16 rotates. Enters the resin recovery chamber 4 from the separation chamber 2. The synthetic resin waste that has entered the resin recovery chamber 4 is recovered from the resin discharge port 6 through a duct.

  The operation of charging the synthetic resin waste with aluminum foil, separating the aluminum foil, and separately collecting the aluminum foil and the synthetic resin is performed continuously, not in batch mode, but continuously. And synthetic resin waste can be separated and recovered.

  As described above, when the synthetic resin waste such as PTP put into the separation chamber 2 is heated to about 80 ° C. to about 100 ° C. by hot air, the aluminum foil shrinks and the synthetic resin softens. Furthermore, the aluminum foil is separated from the synthetic resin and crushed by the rotation of the movable blade 19 of the rotor 16 and the stirring action of the fixed blade 15, so that the crushed aluminum foil passes through the perforated bottom plate 13 and is in the aluminum recovery chamber. 3 is recovered and the synthetic resin can be recovered from the resin recovery chamber 4. Thereby, it can collect | recover in the state which isolate | separated the aluminum foil and the synthetic resin efficiently, throwing the synthetic resin waste with an aluminum foil into the casing 1 continuously.

DESCRIPTION OF SYMBOLS 1 Casing 2 Separation chamber 3 Aluminum collection chamber 4 Resin collection chamber 5 Discharge conveyor 6 Resin discharge port 7 Aluminum discharge port 8 Waste input port 9 Exhaust port 10 Hot air supply port 11 Steam supply port 12 Serrated bottom plate 13 Porous bottom plate 14 Bottom plate 15 Fixed blade 15a Tapered surface 16 Rotor 17 Rotating shaft 18 Disk 19 Movable blade

Claims (6)

Aluminum foil that puts synthetic resin waste with aluminum foil on the synthetic resin into the separation chamber in the casing, rotates the rotor with blades in the separation chamber, and separates and collects the aluminum foil and synthetic resin In the resin separation method,
While blowing hot air into the separation chamber and heating the room temperature from about 80 ° C to about 100 ° C, the rotor is driven to rotate and the aluminum foil adhering to the synthetic resin waste is crushed and separated from the synthetic resin. Let
While the crushed and separated aluminum foil is sent to the aluminum recovery chamber through the porous bottom plate at the bottom of the separation chamber, the synthetic resin is sent to the resin recovery chamber adjacent to the separation chamber by the rotation of the rotor. An aluminum foil / resin separation method, wherein the synthetic resin is recovered from a recovery chamber, and the synthetic resin is recovered from the resin recovery chamber.   2. The aluminum foil / resin separation according to claim 1, wherein the hot air is blown into the separation chamber in the casing in a rotation direction of the rotor and a tangential direction of the outer periphery of the rotor, and steam is supplied into the separation chamber. Method. Aluminum foil that puts synthetic resin waste with aluminum foil on the synthetic resin into the separation chamber in the casing, rotates the rotor with blades in the separation chamber, and separates and collects the aluminum foil and synthetic resin In the resin separator,
A waste input port for introducing synthetic resin waste is provided at the upper end of the casing, while a hot air supply port for blowing hot air to heat the inside of the casing is provided in the casing.
The separation chamber in the casing is rotatably provided with a rotor having a structure in which a plurality of movable blades are pivotally supported on a disk, and a resin recovery chamber is provided on the tip side of the separation chamber. A porous bottom plate is provided at the bottom of the chamber,
A plurality of fixed blades are erected on the porous bottom plate, and the fixed blades are provided with a taper portion for sending synthetic resin waste in the separation chamber from the end portion to the tip portion,
While an aluminum recovery chamber is provided below the porous bottom plate, a resin discharge port for recovering the separated synthetic resin is provided on the bottom plate of the resin recovery chamber,
The synthetic resin waste thrown into the separation chamber is heated with hot air, and the aluminum foil on the synthetic resin waste is separated and crushed by the rotation of the movable blade of the rotor, and the aluminum foil is recovered from the aluminum recovery chamber. The synthetic resin is recovered from the resin recovery chamber.   A serrated bottom plate provided with a sawtooth on a surface thereof is provided adjacent to the porous bottom plate at a lower portion of the separation chamber, and a plurality of fixed blades are erected on the sawtooth bottom plate. Item 4. The aluminum foil / resin separator according to Item 3.   4. The aluminum foil / resin separation device according to claim 3, wherein the casing is provided with a steam supply port for supplying steam into the separation chamber.   4. The aluminum foil / resin according to claim 3, wherein an exhaust port for exhausting is provided in the aluminum recovery chamber, and a discharge conveyor for taking out the aluminum foil is provided at the bottom of the aluminum recovery chamber. Separation device.

Images