JP4108021B2 - Plastic mixture fractionation system - Google Patents

Description

  The present invention relates to a plastic mixture separation processing system (separation processing apparatus or separation processing method) and a separation processing plant (or separation processing facility), and the system (method) or plant (facility). It relates to granulated products that can be used for recycling raw materials.

  In recent years, plastic components such as polyethylene, polypropylene, polyethylene terephthalate (PET), polystyrene, and metal components are separated from waste (general waste, industrial waste, etc.) and processed to be used as fuel. Attempts have been made to reuse. Waste plastics separated at home are usually processed in the form of compressed plastic veils, which are treated as foreign matter [magnetic components, non-magnetic components (metal, stone, sand, glass, wood chips, etc.)] Because it contains moisture and the like, it is necessary to remove or separate these components from the plastic bale.

  In JP-A-7-290457 (Patent Document 1), plastic waste is crushed, metal is separated by a magnet or static electricity, the plastic waste is agglomerated or granulated, and the agglomerated waste is further crushed. A method for treating plastic waste is disclosed. In this document, plastic waste is crushed to a size of about 10 mm to separate metals, the plastic component is melted by frictional force and quenched with water, and then the aggregate is reduced to a particle size of 3 mm or less with a rotor cutter or the like. It is described that it is crushed.

  However, when the method of this document is applied to the plastic bale, the separation efficiency between the plastic component and the metal component is lowered due to the adhesion between the plastics or between the metal and the plastic, and the plastic recovery efficiency is lowered. Further, when the waste contains a high melting point plastic such as PET, nylon, or polycarbonate as a plastic component, a string-like plastic is generated with a decrease in the coagulation efficiency, and the processing capacity is lowered. Further, in the agglomeration or granulation of waste, energy consumption for agglomeration is large, the agglomeration efficiency is lowered, and it is difficult to agglomerate the plastic at a high density.

  In Japanese Patent No. 3109836 (Patent Document 2), a mixed plastic is shredded, a magnetic substance is removed from the shredded material, and the material from which the magnetic substance has been removed is heated or pressurized and agglomerated. A method is disclosed for reworking mixed plastics by suction removal, drying the agglomerated material, and sieving the dried material. In this document, as specific embodiments, (a) a material is shredded by a shredder or the like, (b) a magnetic material is separated and removed by magnetism (such as an overhead belt magnet), and (c) a rotary tube dryer. (D) Remove fine particles using a drum type sieve, etc. (e) Separate and remove heavy materials with a wind sorter, etc. (f) Vibrating conveyor with a sieve base, etc. Remove the fine particles again, (g) homogenize the material using a buffer silo, (h) agglomerate with a coagulator equipped with a suction device, (i) dry the agglomerated material, (j) drum type Fine particles are removed by sieving, etc. (k) coarse particles and fibrous materials are removed by rod sieving, etc. (l) non-magnetic materials are separated and removed by eddy current separators, etc. (m) excessive particles are removed. Sieving and further crusher It describes that the excessive plastic particles are shredded to treat the mixed plastic.

  However, even if the method of this document is applied to the plastic bale, the plastic recovery efficiency and the recovery or removal efficiency of the magnetic substance are lowered. Further, since the agglomeration is performed while containing foreign substances such as non-magnetic substances that are impossible or difficult to aggregate, it is difficult to reduce the agglomeration efficiency of the plastic and to agglomerate the plastic at a high density. Furthermore, in order to remove coarse particles and fibrous materials, high-melting plastics with large sizes (especially string-like high-melting plastics) cannot be separated into reusable shapes, making effective use of high-melting plastics. become unable. Further, the plastic separation process is complicated and disadvantageous in terms of cost.

Further, in the plastic processing method, a granulated product having a low bulk density, a large angle of repose, and good fluidity is obtained due to aggregation or a decrease in granulation efficiency. I can't. In particular, when the waste contains a high melting point plastic, only a granulated product having a low bulk density and a wide particle size distribution width and low fluidity can be obtained. Therefore, when such a granulated material is loaded on a vehicle (truck, etc.) and transported, it requires a large space, not only lowering the transportation efficiency but also tilting the loading surface or passing through the ramp. When the granulated product is transferred from the transport means to the transfer path, the granulated product cannot be smoothly transferred to the transfer path. Moreover, when supplying to a combustion apparatus, a gasifier, etc. through supply paths, such as a hopper, a granulated material will block a supply path. Therefore, it becomes difficult to smoothly transfer or supply the granulated product.
JP-A-7-290457 (Claims) Japanese Patent No. 3109836 (Claim 1, fifth column, lines 5 to 33).

  Accordingly, an object of the present invention is to provide a system (or a method for processing a plastic mixture) and a plant (which can efficiently separate a plastic component at a high yield even if it is a plastic mixture containing a liquid component such as moisture or a non-plastic component. Or a device).

  Another object of the present invention is to provide a system capable of efficiently separating a plastic mixture and effectively reusing the high-melting point plastic without reducing the processing capacity even if it contains a high-melting point plastic such as engineering plastic. It is to provide a plant (or apparatus).

  Still another object of the present invention is to provide a system and plant (or apparatus) capable of producing a recycled plastic granulated product having a large bulk density and good fluidity.

  As a result of intensive studies to achieve the above-mentioned problems, the present inventors combined primary crushing and drying of a plastic mixture in a fractionation treatment of a plastic mixture containing a liquid component such as water and a non-plastic component such as metal. , Found that the combination of wind power separation of plastic components from the primary crushed material after drying and separation of foreign matters (non-plastic components such as magnetic components or heavy components) can efficiently recover the plastic in a high yield. Completed the invention.

  That is, the fractionation processing system (or processing method) of the present invention is a system for fractionating a plastic component from a plastic mixture containing a volatile liquid component and a non-plastic component, and (a) primarily crushes the mixture. A step, (b) a step of drying the primary crushed material, and (c) the dried primary crushed material, using an air flow, into a plastic component and a crude plastic component containing foreign matter (non-plastic component). A step of sorting, (d) a step of removing foreign substances from the crude plastic component to separate the plastic component, and (f) a step of granulating the plastic component from the sorting step (c) and the separation step (d). And (h) a step of secondarily crushing this plastic granulated product. In the primary crushing step (a), the plastic mixture may be crushed to an average diameter of about 10 to 100 mm, and in the drying step (b), the primary crushed product may be dried to a moisture content of 12% by weight or less. Further, in the separation step (d), the magnetic component may be removed from the crude plastic component using (d-1) magnetic force, and (d-2) the coarse gravity difference or particle size difference may be used. Nonmagnetic components may be removed from the plastic component. In the granulation step (f), the plastic component is often melted and granulated using frictional heat, and the granulated product generated in the granulation step (f) is subjected to the secondary crushing step (h). Prior to this, it may be cooled by being conveyed while being vibrated by spraying a refrigerant or the like. In the secondary crushing step (h), the granulated product generated in the granulating step (f) may be crushed to an average diameter of about 1 to 20 mm.

  The present invention can be applied to various plastic mixtures (or wastes), and the plastic mixture is composed of a low melting point plastic component (for example, a low melting point plastic component that can be melted by frictional heat in the granulation step (f)) and a high melting point plastic. And a component (for example, a high melting point plastic component that is not meltable by the frictional heat).

  More specifically, for example, a plastic mixture containing a moisture, a low-melting plastic component that can be melted at a temperature of 50 to 200 ° C., a non-melting high-melting plastic component and a non-plastic component at the above temperature, (a) an average diameter Primary crushing to 20 to 50 mm, (b) drying the primary crushing material to a moisture content of 10% by weight or less, (c) separating the plastic component and the crude plastic component including non-plastic components by wind force, (D) The magnetic component and the non-magnetic component are removed from the crude plastic component to separate the plastic component. (F) The rotational friction heat is used for the plastic component from the sorting step (c) and the separation step (d). Then, it is melted and granulated, transported while being vibrated and cooled, and (h) this plastic granulated product is subjected to fractionation treatment by secondary crushing to an average diameter of 3 to 10 mm. Good.

The present invention also includes a plastic granulated product obtained by the above system. This granulated product has a feature of a large bulk density and good fluidity. The bulk density of the granulated product may be about 0.35 to 0.55 g / cm ³ , and the angle of repose is usually 60 ° or less.

  The present invention further provides a plastic fractionation plant, for example, (a) a primary crusher for primary crushing of a plastic mixture containing volatile liquid components and non-plastic components, and (b) removing liquid components from the primary crush. (C) a wind separator for separating the dried primary crushed material into a plastic component and a crude plastic component containing foreign matter (non-plastic component), (d) removing foreign matter from the crude plastic component A separator for separating the plastic components, (f) a wind separator and a granulator for granulating the plastic components from the separator, and (h) a secondary for crushing the plastic granules It also includes a plant (or apparatus) composed of crushers. In this apparatus, the separator (d) may be composed of at least (d-1) a separator for removing the magnetic component from the crude plastic component.

  In the present invention, primary crushing, drying, wind sorting, and separation of foreign substances are combined, so that even plastic mixtures containing liquid components such as moisture and non-plastic components can be separated efficiently and with high yield. It can be processed. Further, even if a high melting point plastic component is contained, the plastic mixture can be fractionated efficiently without reducing the processing capacity, and the high melting point plastic component can also be effectively reused. Furthermore, a recycled plastic granulated product with high bulk density and high fluidity can be produced.

  Hereinafter, the present invention will be described in detail with reference to the accompanying drawings as necessary.

  In the present invention, the plastic component is fractionated or processed from the plastic mixture. Plastic mixtures (hereinafter sometimes referred to simply as mixtures) are usually available as plastic waste (eg, plastic waste from household or industrial (industrial) waste).

  Examples of the plastic component include various plastic components, for example, thermoplastic resins [olefin resins such as polyethylene (PE) and polypropylene (PP); polystyrene resins, acrylonitrile-styrene copolymers (AS resins), rubber components] Styrenic resins such as graft copolymers (impact-resistant polystyrene resins, ABS resins, etc.) obtained by graft polymerization of styrene monomers; acrylic resins such as polymethyl methacrylate; polyvinyl chloride, polyvinylidene chloride, fluorine Halogen-containing resins such as resins; Polyester resins such as polyethylene terephthalate (PET), polybutylene terephthalate, and polyethylene naphthalate (aromatic polyester resins (homo or copolyester resins)); Polyamide resins; Polycarbonate resins Etc.].

  The mixture may include a single plastic of these plastic components, but typically includes a plurality of plastics. Also, the mixture often includes at least one thermoplastic resin. In particular, the mixture is composed of a plastic component having a low melting point or a low softening point (a thermoplastic resin, for example, an olefin resin such as polyethylene or polypropylene, a general plastic such as a styrene resin or an acrylic resin) and a high melting point or a softening point plastic. It often contains a component (a thermoplastic resin such as an aromatic polyester resin, a polyamide resin, or a polycarbonate resin). The high melting point or high softening point plastic component may be an engineering plastic such as a polyphenylene ether resin, a polyphenylene sulfide resin, or a liquid crystal plastic.

  The low melting point or low softening point plastic component (hereinafter sometimes simply referred to as a low melting point plastic component) is usually meltable at a temperature of 50 to 200 ° C., preferably 70 to 160 ° C. (more preferably 100 to 150 ° C.). In general, a high melting point or high softening point plastic component (hereinafter sometimes simply referred to as a high melting point plastic component) is usually non-melting at the above temperature.

  The shape of the plastic component in the mixture is not particularly limited, and may be non-linear [debris (or powder), flakes, etc.], or linear (e.g., fiber, string, or strip). The plastic component (such as a linear plastic component) may be randomly twisted or bent. Further, when the mixture contains a high melting point plastic component, the form of the high melting point plastic component (such as aromatic polyester resin such as PET) may be nonlinear or linear (string, strip, etc.). May be.

  In addition to the plastic component, the plastic mixture contains a volatile liquid component (particularly moisture), a non-plastic component (foreign matter), etc., and these components are removed or separated from the plastic mixture according to the present invention. . Non-plastic component (foreign matter) includes magnetic component [magnetic metal component (magnetic metal such as iron, iron alloy)], non-magnetic component [non-magnetic metal component (copper, aluminum, etc.), non-magnetic inorganic component (stone, Sand, mud, glass, ceramic pieces, etc.), non-magnetic organic components (wood pieces, wood chips, paper, etc.), non-magnetic components in which organic and inorganic substances are combined or integrated (covered cables, etc.) It is. The magnetic component as a foreign substance is composed of a magnetic metal, and the non-magnetic component is a heavy component with a large specific gravity (metal component, inorganic component, composite component, etc.) and a light component with a low specific gravity (organic component, composite component, etc.) And can be broadly divided. Further, the form of the magnetic component and the non-magnetic component may be such that at least the short-axis cross section is in the form of particles (eg, powder, granules, rods). A component having at least a short-axis cross-section in the form of particles may be simply referred to as a particle component.

  The water content of the mixture varies depending on the source of the mixture, etc., but is usually about 7 to 20% by weight (for example, 10 to 20% by weight, particularly 13 to 18% by weight), but is not particularly limited. Absent.

Further, the form of the mixture may be a simple plastic mixture, but may be a form of a compression mixture usually referred to as a bale (hereinafter sometimes simply referred to as a bale). The veil is a lump of waste collected by households and municipalities and sorted and compressed by a processor, and is usually a compressed product of about 100 to 400 kg / m ³ , preferably about 250 to 350 kg / m ³ .

  FIG. 1 is a flowchart showing an example of a plastic separation processing system (or separation processing method) according to the present invention. In order to improve the drying efficiency and the like, the plastic mixture is primarily crushed in the primary crushing step (a) and then dried in the drying step (b) to remove volatile liquid components (particularly water). Therefore, when the dried primary crushed material is subjected to a sorting step (c) using wind power, the primary crushed material is a crude plastic component containing each component, that is, a plastic component (or light component) and a foreign matter (non-plastic component). (Or heavy components) can be efficiently separated, and plastic components can be selected. The crude plastic component is subjected to a separation step (d), and foreign substances (or non-plastic components and heavy components) are removed from the crude plastic component to sort or separate the plastic component. In this separation step (d), first, in the magnetic component separation step (d-1), magnetic components (especially heavy magnetic components such as magnetic metals) are removed from the crude plastic component using magnetic force, and subsequently, In the nonmagnetic component separation step (d-2), the nonmagnetic heavy component (or the nonmagnetic particle component such as a nonmagnetic inorganic component) is removed using the specific gravity difference and the particle size difference. The plastic components from the sorting step (c) and the separation step (d) are temporarily stored in the storage step (e) if necessary, and then formed in the granulation step (f) using the thermal properties of the plastic component. Grained. The plastic granulated product (primary granulated product) is crushed and sized in the secondary crushing step (h) after the residual heat is removed in the cooling step (g). The sized granulated product (or secondary granulated product, sized product) is transported in the transporting step (i), if necessary, and then stored in the storage or storage step (j) for separation treatment. finish. The granulated product stored or stored in the storage step (j) can be used as a gasification raw material, fuel, re-raw material and the like.

  In the primary crushing step (a), the mixture is crushed or cut to an average diameter (average value of major axis) of about 20 to 50 mm (for example, 30 to 40 mm). When primary crushing is performed in such a size, not only energy and drying time required for drying can be reduced in the drying step (b), but also the primary crushed material can be efficiently separated into each component, and drying efficiency can be improved. In addition, the sorting or separation efficiency in the wind sorting process (c) can be improved. In the granulation process (f), the mixture can be granulated with a narrow particle size distribution, and the energy consumption in the granulation can be reduced. (Granulation accuracy) can be improved.

  FIG. 2 is a schematic cross-sectional view showing an example of the structure of a uniaxial crusher that can be used as a primary crusher. The uniaxial crusher 20 is formed on one side of a flow path (lower flow path) connected to the hopper, and a hopper 21 that constitutes an inlet for the material to be crushed (plastic mixture). A pusher 23 capable of moving forward and backward for supplying or pressing to the crushing area, a fixed blade 25 projecting from the crushing area, and crushing or cutting the object to be crushed in relation to the fixed blade 25, and A plurality of rotary blades 24 (or a rotor provided with the rotary blades 24) that can rotate with respect to the fixed blades, and a shredded object that is provided on the back of the rotation area of the rotary blades 24 and is crushed or cut to a predetermined size And a screen 26 through which objects can pass. The rotary blade 24 constitutes a crushing rotor, and the screen 26 can be opened for repair or the like.

  In such a primary crusher, after crushing the mixture with a rotary blade and a fixed blade, a mixture (or crushed material) exceeding a predetermined size (or particle size) is re-crushed in the machine by circulation. Even if a small mixture (a plastic mixture having various sizes and shapes (tape-like)) is crushed, a primary crushed material having a relatively stable size can be obtained.

  In the drying step (b), the primary crushed plastic mixture (primary crushed material) is heated to remove volatile liquid components (especially moisture) in the mixture, and the moisture content is 12% by weight based on the entire primary crushed material. It is dried to the following (for example, about 2 to 10% by weight, particularly about 2 to 8% by weight). When the primary crushed material is dried, the plastic component can be efficiently separated into each component in the sorting step (c) and can be granulated efficiently in the granulation step (f).

  In this example, the primary crushed material is dried using a rotating drum type (rotary kiln type) dehumidification or drying device that rotates the primary crushed material with hot air while rotating it. The rotating drum is inclined. When a rotary kiln type dehumidifier is used, the crushed material is stirred, and moisture or the like sandwiched between the crushed materials can be efficiently dehumidified or dried.

  In the sorting step (c), a crude plastic component (heavy component) including a plastic component as a low specific gravity component (light component) and a non-plastic component as a high specific gravity component using airflow (or wind power). And sorting. In the sorting step (c), the pre-dried primary crushed material is subjected to wind sorting, so that it is possible to prevent adhesion between plastic components and foreign matters (non-plastic components) and between plastics. The plastics can be sorted efficiently without causing a decrease in accuracy.

  FIG. 3 is a schematic cross-sectional view showing an example of a wind power sorter that can be used in the sorting step (c). The wind power sorter 30 is provided with an inlet 31 through which a dried primary crushed material can be continuously charged at a predetermined ratio, and a primary crushed material (or a primary crushed material falling path) that is dropped from the inlet 31 and dropped. On the other hand, a blowing nozzle 32 for blowing an air flow (air flow) obliquely upward from a diagonally downward direction (or intersecting direction) to the primary crushed material with a predetermined air volume, and an upper portion of the wind power sorter 30 facing the air flow. A shielding plate 33 that is disposed and guides the plastic component 38 that is shielded or separated by shielding the airflow downward, and an upper portion of the wind power sorter 30 that is located on the airflow traveling direction side of the shielding plate 33. An exhaust suction nozzle 34 formed between the shield plate 33 and the suction nozzle 34, and a net filter 35 for restricting the passage or discharge of the plastic component 38; A branch plate (or a plate for regulating mixing of a heavy component (coarse plastic component) 37 that has fallen without being scattered by an air current and a light component (plastic component) 38 that has flew without being scattered by an air current (or 35) A restricting plate) 36. That is, in the wind power sorter 30, the resistance against the airflow is used, and the plastic component (light component) 38 as a component having a relatively small weight (or specific gravity) and the component having a relatively large weight (or specific gravity) are used. Separated into crude plastic component (heavy component) 37. In such a method, since the airflow is used, the primary crushed material can be separated into individual components and loosened, and the separation efficiency can be increased.

  In this example, the heavy component and the light component are selected at a wind speed of about 5 to 20 m / second (for example, 6 to 18 m / second).

  The plastic component usually remains in the crude plastic component selected by wind power. Therefore, in the separation step (d), the non-plastic component (foreign matter or heavy component) is removed from the crude plastic component generated in the sorting step (c), and the remaining plastic component is further sorted or separated.

  In the separation step (d), the magnetic component separation step (d-1) for removing magnetic components (magnetic metal, etc.) from the crude plastic component using the magnetic attractive force (magnetic force) of the magnet, the difference in specific gravity and In the non-magnetic component separation step (d-2) for removing non-magnetic heavy components (or non-magnetic particle components such as non-magnetic inorganic components and organic components) from crude plastic components using the particle size difference It is configured. In the nonmagnetic component separation step (d-2), the nonmagnetic inorganic component is often mainly removed from the nonmagnetic heavy component, so that it can also be referred to as a nonmagnetic inorganic component separation step.

  FIG. 4 is a schematic cross-sectional view showing an example of a magnetic metal sorter that can be used in the magnetic component separation step (d-1). A magnetic component removing device (metal sorter) 40 includes an input port (or hopper) 41 for supplying a crude plastic component, and a magnetic component (mainly a magnetic metal component) among the crude plastic components input from the input port 41. ) And a magnet 42 having a semicircular arc-shaped (or fan-shaped) surface fixed with the top part thereof substantially directed to the side, and rotatable with respect to the fixed magnet (in this example) , A rotating drum 43 that can be rotated in a clockwise direction), and constitutes a drum type magnetic separator 44. More specifically, the top of the rotating drum 43 that can be rotated by the rotating shaft is located at the dropping position of the crude plastic component charged from the charging port 41, and the rotating drum 43 has a semicircular cross section. A (or fan-shaped) magnet 42 is fixed by being slightly inclined or rotated counterclockwise. That is, in order to efficiently collect the magnetic component contained in the crude plastic component, a predetermined portion (in this example, a drop in the counterclockwise direction from the drop center of the crude plastic component from the inlet (or the top of the rotating drum)) One end of a semicircular arc (or fan-shaped) magnet 42 is positioned on the left side of the center to form a collection start end by magnetic force. In addition, a portion of the rotating drum 43 corresponding to the other end of the semicircular arc (or fan-shaped) magnet 42 in the cross section (in this example, on the right side of the lowermost portion of the rotating drum 43) is a magnetic component caused by magnetic force. Forms a release site.

  Therefore, non-magnetic components (particularly non-magnetic heavy components such as non-magnetic inorganic components) among the crude plastic components falling on the rotating drum 43 are not affected by the magnetic attractive force of the magnet 42, and the rotating drum 43. Is rotated in the direction of rotation, is separated from the rotating drum 43 in the lateral region of the rotating drum 43, falls, and is collected by a collecting unit 45 for collecting nonmagnetic components including plastic. On the other hand, the magnetic component (particularly magnetic metal component) of the crude plastic component is conveyed in the rotation direction as the rotating drum 43 rotates while being attracted by the magnet 42. Further, the action of the magnetic force on the magnetic component is released at the terminal end portion (the lower end portion in this example) of the magnet 42, and the released magnetic component is captured by the collecting unit (not shown) while being guided by the guide plate 46. Be collected. The guide plate 46 is positioned on the axial direction side of the rotating drum 43 with respect to the side top in the rotating direction of the rotating drum 43 in order to increase the separation efficiency of the magnetic component.

  When such a drum type magnetic separator 44 is used, even if it is a plastic mixture (plastic veil etc.) with a low content of magnetic components (especially magnetic metal components), magnetic components (especially magnetic metal components) and non-magnetic components ( In particular, nonmagnetic heavy components such as nonmagnetic inorganic components) can be continuously and efficiently separated.

  In the separation step (d-2) of the non-magnetic heavy component (or particulate component such as the granular non-magnetic inorganic component), the non-magnetic component (particularly non-magnetic inorganic) from the crude plastic component from the magnetic component separation step (d-1) Remove heavy particle components such as components) and separate plastic components.

  In this example, since it is continuously processed, the non-magnetic component (or non-magnetic heavy particle component) is separated using the difference in particle size and specific gravity as a non-magnetic heavy component (or inorganic component) removal device. To do. Specifically, examples of the removing device include a vibrating sieve having an opening of 20 to 30 mm, a wind power sorter, and the like. In such an apparatus, the non-magnetic heavy component (inorganic component, particularly non-magnetic particle component) can be separated by supplying the crude plastic component from which the magnetic component (especially magnetic metal) has been removed.

  The plastic component separated in the sorting step (c) and the separation step (d) is temporarily stored in a storage unit (for example, a silo) in the storage step (e), and melt granulation step using rotational frictional heat ( Provided to f). In this granulation step (f), using the thermal properties of the plastic component, the plastic component selected in the selection step (c) and the separation step (d) is contracted in volume by melting, It is granulated (or agglomerated) by densifying it into granules by rotation and / or swirling.

  In this example, in order to efficiently granulate a plastic component containing a low melting point or low softening point plastic component and a high melting point plastic component, heating is applied as necessary to cause rotational shear force and rotational friction force to act on the plastic component. By heating to about 120 to 180 ° C. (for example, 150 to 160 ° C.), at least a part of the low melting point plastic component is softened or melted. Further, the plastic component is granulated by a spheroidizing action accompanying rotation (rotation and / or swirling on the inner surface of the chamber, or a spheroidizing action accompanying a collision with the inner surface of the chamber, etc.). Therefore, it is possible to granulate by melting or softening the low melting point plastic component without melting or softening the high melting point plastic component, and the energy efficiency is high.

  FIG. 5 is a schematic plan view showing an example of a granulator usable in the granulation step (f), and FIG. 6 is a schematic cross-sectional view of the granulator of FIG. The granulator 50 is attached to a casing 51 capable of containing a plastic component, and a plurality of components that are attached to a rotating shaft and can apply shearing force (frictional force) to the plastic component by stirring and cut or crush the solidified plastic component. The multistage rotary blade 52 (52a, 52b) and a cooling unit or a refrigerant charging unit (not shown) for cooling the melted (or softened) granulated plastic component. An inclined plate 51 a is attached to the lower corner portion of the casing 51. The lower blade 52b of the rotating blades 52 has a large thickness, and both end portions thereof are inclined upward (opening side) corresponding to the inclined plate 51a. In such a granulator, the plastic component is crushed and melted (or softened) by frictional heat due to the shearing force of the rotating blade 52 rotating at high speed and the collision with the inner wall of the casing 51. The melted plastic component is rapidly cooled and solidified by the refrigerant supplied from the cooling unit, and is crushed by the rotary blade 52 and simultaneously spheroidized and granulated.

  Since the plastic granulated product produced in the granulating step (f) and taken out from the chamber is still in a high temperature state, it is cooled in the cooling step (g) prior to the secondary crushing step (h). More specifically, in order to prevent the granules still in the softened state from adhering to each other or to be fused (blocking), the granules from the granulator are conveyed while being vibrated and conveyed. However, cooling is performed by spraying refrigerant (water). In addition, the spray amount of the refrigerant (water) is a ratio at which the granulated product is not excessively wetted with water and the granulated product can be prevented from being fused, for example, the temperature of the granulated product is about 50 to 100 ° C. It may be. In such a method, the cooling time and the transport or transfer distance to the secondary crushing process can be reduced, and the processing efficiency can be improved and the plant can be slimmed.

The plastic granulated product (primary granulated product) obtained in the granulating step (f) has a wide particle size distribution and often contains a string-like plastic component (high melting point plastic component). Therefore, in the secondary crushing step (h), the granulated product is secondarily crushed to obtain an average diameter of about 3 to 10 mm (for example, 3 to 4 mm) and a bulk density of 0.4 to 0.6 g / cm ³ ( For example, it is sized as a granulated product (or secondary granulated product, sized product) of about 0.4 to 0.55 g / cm ³ ).

  FIG. 7 is a schematic cross-sectional view showing an example of a uniaxial crusher that can be used in the secondary crushing step (h). The uniaxial crusher 60 includes a crushing or cutting means for crushing a plastic granulated material from a chamber inlet 61 in a ring-shaped crushing area, and a granulation cut or crushed to a predetermined size by the crushing means. It is comprised with the screen 66 which permits passage of an object. The crushing or cutting means includes a fixed blade 65 projecting from a crushing region having a ring-shaped cross section, and a rotary blade 64 that can rotate with respect to the fixed blade. A rotary table (rotary blade base) 63 having a triangular cross section that can be rotated in the crushing zone, and is attached to a corner portion of the rotary table via an attachment unit, and in combination with the fixed blade 65, And a blade 62 for crushing or cutting into a predetermined size. Further, as the blade 62, a straight blade that can be cut linearly or a helical blade that can be cut in a meandering manner is used. Further, the screen 66 is disposed on the opposite side (back part) of the rotation area of the rotary blade 64 to the insertion port 61.

  In such a uniaxial crusher, a shearing force acting between a uniaxial rotating blade and a fixed blade is used as a main crushing force to crush the granulated product and to obtain a predetermined screen size (or particle size). It is possible to re-crush the plastic granulated material in excess in the machine. Therefore, even if it is a granulated product that is relatively soft and has a small specific gravity, the particle size of the secondary crushed product (sized product or granulated product) can be made uniform and sized. In particular, even if the primary granulated product produced in the granulation process contains string-like plastic (high melting point plastic) or relatively large size high melting point plastic, it is ensured by crushing and passing through the screen. The particle size or particle size distribution of the secondary granulated product (or secondary granulated product, sized product) can be narrowed efficiently and efficiently, and the granulated product of stable size (or secondary granulated product, sized product) Can be obtained.

  If the volume of the granulated material is simply reduced, a certain amount of granulation can be performed. However, in the use of an actual granulated product, it is required that the bulk density is large, the particle size distribution width is narrow (for example, particle size distribution is on the order of several mm), and the angle of repose is small. This method is effective as a treatment method for obtaining such a granulated product.

  The granulated product (or secondary granulated product, granulated product) generated by secondary crushing is transported to a storage or storage unit such as a silo using an air flow (especially an air flow) in the transport step (i). In the storage step (j), it is stored or stored as the final granulated product. When an air transportation and transportation device is used as the transportation device, the granulated product can be smoothly transported using an air stream (particularly air stream), and the granulated product can be dried and cooled by the air stream. Space saving and prevention of blocking of granulated products are possible.

  In addition, in the primary crushing step (a), the average diameter of the primary crushed material (average value of the major axis of the primary crushed material) is not limited. For example, the crushing average diameter of the plastic mixture can be selected from a range of about 10 to 100 mm, Preferably it may be about 20-50 mm, more preferably about 20-40 mm.

  As the primary crusher, various crushers such as a shredder, a hammer crusher, a biaxial crusher that crushes with a biaxial rotary blade, a triaxial crusher that crushes with a triaxial rotary blade, etc. However, in order to efficiently crush even if a tape-shaped plastic is mixed, a fixed blade, a rotary blade (crushing rotor or rotor blade) and a screen having a predetermined hole diameter are provided, and crushing or pressing is performed. It is preferred to use a severable uniaxial crusher.

  In the drying step (b), the moisture content of the dried crushed material depends on the moisture content of the plastic mixture, but is, for example, 12% by weight or less (for example, 0 to 12% by weight) with respect to the entire primary crushed material. ), Preferably 10% by weight or less (for example, 0 to 10% by weight), more preferably 8% by weight or less (for example, 0 to 8% by weight).

  The drying method can be appropriately selected according to the mode of the mixture and the water content, and is a method by centrifugation (for example, separation and removal of water by a centrifuge), heating (heating using induction heating, heated airflow, external heating, etc.) The method by etc. is mentioned. For a plastic mixture having a relatively high water content, such as a plastic veil, a method of heating, particularly drying with hot air is preferred.

  The drying device by heating is not particularly limited as long as volatile liquid components (especially moisture) can be removed by heating, and it is heated while conveying crushed material by an induction heating device, a floating fluid drying device by a heated air current, or a conveyance path. A drying furnace for drying with an air current, a heating dehumidifier, or the like can be used. In order to increase the heating and drying efficiency of the primary crushed material, it is advantageous to use a rotating drum type (rotary kiln type) dehumidifying or drying device as the drying device (or heating dehumidifying device). In the rotary drum type drying apparatus (or heating dehumidifying apparatus), the primary crushed material may be dried by introducing a drying airflow (particularly a heating airflow) into the kiln.

  In the sorting step (c), the wind speed for sorting is, for example, 8 m / second or more (for example, 10 to 25 m / second), preferably 10 m / second or more (for example, 10 to 20 m / second), more preferably 12 m. / Second or more (for example, 12 to 20 m / second). In addition, the separation efficiency between the light component and the heavy component can be adjusted by the position of the branch plate in association with the type of the mixture (waste) and the air volume, and the arrangement position of the branch plate moves to the filter side. As it goes on, the separation efficiency of the light components can be improved.

  Separation step (d) removes foreign substances (non-plastic components and heavy foreign components) from the crude plastic component, and as long as the plastic component can be separated, various separation methods (especially dry type) can be used depending on the type of plastic mixture. Separation method), for example, separation method using airflow (wind classification or separation method), magnetic separation method, electrostatic separation method (separation method of insulators such as plastics and particles by static electricity), centrifugal force, etc. Separation method (separation method using a rotating table that may tilt), separation method using vibration (separation method using vibration table, etc.), separation method using passage size (screen, filter or sieve) Or a combination of these methods can be used. In the separation step (d), in particular, metal (magnetic metal, non-magnetic metal), inorganic substance (sand, stone, mud, glass, ceramic piece, etc.) and organic / inorganic composite containing at least inorganic substance (covered cable wire, metal) It is advantageous to separate a bonded body of glass and resin.

  The separation step (d) may be composed of the magnetic component separation step (d-1) or the nonmagnetic component separation step (d-2) alone. Since it often contains inorganic components, in order to increase the recovery efficiency of plastic components, magnetic component separation step (d-1) for separating magnetic metals and nonmagnetic components for separating nonmagnetic inorganic components, etc. It is preferable to separate the plastic component in combination with the separation step (d-2). The order of the magnetic component separation step (d-1) and the nonmagnetic component separation step (d-2) is not particularly limited, and after the nonmagnetic component separation step (d-2), the magnetic component separation step ( d-1) may be performed. From the viewpoint of recovery of the magnetic metal, as shown in FIG. 1, after separating the magnetic component, it is preferable to separate the nonmagnetic component and recover the plastic component.

  In the separation step (d-1) of the magnetic component, it is only necessary to separate the magnetic metal component and the non-magnetic component using magnetism or magnetic force. In addition to the drum type sorter shown in FIG. Metal sorter provided with magnetic metal adhesion means, for example, magnetic adsorption means (magnets, etc.) are arranged at predetermined intervals with respect to the traveling direction of the crude plastic component passing on the conveyor to adhere the magnetic metal. It is also possible to use a hanging type sorter that sorts by. A permanent magnet or an electromagnet may be used as the magnet.

  In the nonmagnetic component separation step (d-2), the plastic component and the nonmagnetic component may be separated by various separation methods depending on the type of the nonmagnetic component, not limited to the particle size difference. For example, in a crude plastic component obtained by air classification, a nonmagnetic component often has a higher specific gravity than a plastic component. Therefore, the nonmagnetic component may be separated by using a classification means using the specific gravity difference, for example, an air classification. Further, the separation method using the particle size difference and the separation method using the specific gravity difference may be combined.

  Although the removal apparatus of a nonmagnetic component (or inorganic component) is not specifically limited, The sieve (sieve) using a particle size difference, an air classification, etc. can be utilized. As a preferable apparatus, an apparatus capable of continuous processing, for example, the vibrating sieve can be used. The opening size (average opening diameter) of the sieve (sieve) can be selected according to the crushing size of the primary crusher, for example, 10 to 100 mm, preferably 20 to 50 mm, more preferably about 20 to 40 mm. There may be. In addition, when the plastic mixture contains a high specific gravity plastic (for example, polyvinyl chloride resin, polyvinylidene chloride resin, etc.), depending on the use of the final product (granulated product), the drying step (b) (D-3) The high specific gravity plastic is separated and removed from the plastic component at an appropriate stage from the process to the granulation process (f) (for example, following the separation process (d-2) of the non-magnetic component). Also good. Examples of the method for separating and removing the high specific gravity plastic include a specific gravity separation method (for example, a method using the wind power sorter or the like).

  The plastic components selected in the sorting step (c) and the separation step (d) may be directly used in the granulation step (f) without being temporarily stored in a storage unit such as a silo in the storage step (e). it can. The granulation temperature may be any temperature as long as at least the plastic component can be melted or softened and granulated, and can be appropriately selected from the range of about 50 to 200 ° C. depending on the type of the mixture (particularly the plastic component). When the mixture includes a low melting point or low softening point plastic component and a high melting point plastic component, in the granulation step (f), at least a part of the low melting point plastic component is softened or melted to granulate the plastic component. Good. The melting temperature of the plastic component (particularly the low melting point plastic component) can be selected within a range in which at least a part of the plastic can be melted (or softened), and is, for example, 50 to 200 ° C, preferably 70 to 160 ° C, and more preferably 100 to 100 ° C. It may be about 150 ° C. Granulation at the melting or softening temperature of the low melting point plastic component is advantageous in terms of energy efficiency.

  In the granulation step (f), fluidized bed granulation using a binder or the like may be performed, but a heat granulation method in which a plastic component is thermally fused and granulated is preferable. For heating the plastic component, induction heating, external heating, or the like can be used. For example, depending on the type of the mixture, granulation may be performed using an extruder (ring die type, screw type, etc.) equipped with a melt kneader. In a preferred method, the plastic component is often melted by utilizing a method utilizing self-heating, for example, frictional heat (or shearing heat), particularly frictional heat generated by rotation, turning, collision, or the like. In this method, during the granulation process, various spheroidizing or spheroidizing actions act on the plastic component with rotation or rolling, and the plastic component can be smoothly granulated into a form having a curved surface such as a sphere. In particular, even if it contains a string-like plastic component, it can be efficiently granulated. When used for rotating or rolling, the generated granulated material often has a curved surface at least partially, and the shape of the granulated product is generally spherical (spherical, ellipsoidal, spindle, disk-shaped) Etc.) in many cases.

  In the granulator, the number of rotating blades is not particularly limited, and for example, the rotating blade may have a plurality of rotating blades of about 2 to 6 in the circumferential direction. Further, the rotary blades need not be attached in multiple stages with respect to the rotary shaft (or the rotary base), and may be a single stage. Furthermore, the shape of the rotary blade is not particularly limited, and the rotational speed of the rotary blade can be selected according to the type of plastic component, the melting point, and the like, for example, 400 to 1000 rpm, preferably 500 to 800 rpm, and more preferably 600 to 700 rpm. It may be a degree. In the above example, at least a part of the low melting point plastic component is softened or melted, but it may be heated to a temperature at which at least a part of the high melting point plastic component is softened or melted.

  After the granulation step (f), the cooling step (g) is not necessarily required. In order to prevent granulation from being fused (blocking) and obtain a granulated product of a predetermined size by secondary crushing. The granulated product produced in the granulation step is preferably cooled.

  The cooling method may be air cooling or cooling by using cold air or the like, but it is preferable to spray a coolant such as water (for example, water) using a coolant spraying device. Cooling may be performed in a granulator or may be performed while conveying a plastic granulated product from the granulator. The conveying method is not particularly limited, and an air current or the like may be used, or the conveying method may be performed by a conveyor or the like. The conveyor may be vibrable and may be ventilated to cool the granulate. In a preferred method, in order to avoid or suppress the granules that are still in a softened state from adhering to or fusing with each other, the granulated product is conveyed while being vibrated using a conveyer that can be vibrated and ventilated. . In order to increase the processing capacity, it is preferable to cool the plastic granule by conveying it while vibrating it and spraying a refrigerant.

  The cooling temperature of the granulated product (the temperature of the granulated product to be subjected to secondary crushing) may be in a range that does not interfere with the secondary crushing process, for example, 50 to 100 ° C, preferably 50 to 80 ° C, Preferably, about 50-60 degreeC may be sufficient. Moreover, the conveyance distance in cooling can be selected according to a processing amount, the temperature of a granulated material, watering ability, a conveyance speed, etc.

  The particle size of the granulated product (secondary granulated product or sized product) produced by the secondary crushing step (h) is, for example, an average particle size of 1 to 20 mm, preferably 3 to 10 mm, more preferably 3 to 7 mm. It may be about (for example, 3 to 4 mm). The screen size of the secondary crusher may be set to, for example, an opening (opening diameter) of 4 to 25 mm, preferably 4 to 10 mm, and more preferably about 6 to 8 mm.

  In the secondary crushing step (h), a shearing crusher (a cutter mill such as a single-shaft crusher, a hammer mill that crushes with a rotating hammer, a twin-screw crusher that crushes with a biaxial rotary blade, or a triaxial rotary blade. A triaxial crusher, etc.) and an impact crusher (impeller breaker, pulverizer, etc.) can be used. In particular, when a string-like high melting point plastic is included, as shown in FIG. 7, a uniaxial crusher equipped with a fixed blade and a rotary blade that can rotate with respect to the fixed blade can be suitably used. The blade may be a straight blade or a helical blade.

  The transport method in the transport step (i) is not particularly limited, and examples thereof include a conveyor system and an air transport system that transports by an air flow. The plastic granulated product storage step (j) is not necessarily required, and the granulated product is transported (or not transported) in the transporting step (i) and directly used for transportation means (for example, a truck). Well, you may use for a reuse process (for example, gasification process etc.).

In the present invention, since the primary crushing of the plastic mixture, the drying of the primary crushed material, the wind sorting and the separator are combined, it is possible to efficiently sort into the plastic component and the crude plastic component containing foreign substances using wind power. In addition, foreign substances such as magnetic metals can be effectively removed from the crude plastic component. Therefore, even if it is a plastic mixture containing a liquid component and a non-plastic component, it is possible to improve the granulation efficiency and the processing capacity of the entire system, and to collect the plastic at a high recovery rate. In this invention, even if it is a plastic waste, it has a form which can be reused and can obtain a high quality plastic granulated product. That is, the granulated product has a high bulk density, high fluidity, and a relatively narrow particle size distribution. The bulk density of the granulated product, depending on the type of processing plastic mixtures, for example, 0.25~0.6g / cm ^3, preferably 0.35~0.55g / cm ³ order.

  In addition, a granulated product often has a curved surface at least partially, and the shape of the granulated product is generally a cross-section spindle or sphere (spherical, ellipsoid (or spindle), disk, etc.). There may be. In particular, even if the mixture contains a high melting point plastic component, the granulated product often has at least a curved surface. Therefore, the granulated product has a small angle of repose and a high fluidity (and consequently, transportability or transportability). The angle of repose of the granulated product is 60 ° or less (for example, 40 to 60 °), preferably 50 ° or less (for example, 40 to 50 °). The granulated product not only has the same average particle size as described above, but also has a feature that the particle size distribution width is narrow and sharp. When the screen size of the secondary crusher, that is, the opening (opening diameter) is set to about 8 mm, the particle size distribution of the granulated product is about 2.5 to 4 mm in average particle size. When the ratio of the granular material passing through the sieve having a mesh of 2.36 mm is D2.0, the sieve having a sieve opening of 4.75 mm, and the ratio of the granular material passing through the sieve having an aperture of 8.0 mm is D4.75, D2 0.0 = about 10-16% by weight and D4.75 = about 25-30% by weight.

  In addition, the granulated product (sized product) may include amorphous granular materials (for example, flat or flaky materials), plastic small pieces, and the like as long as the properties such as fluidity are not impaired.

  The water content of the granulated product is not particularly limited, but is usually a low moisture content. The water content of the granulated product is, for example, 3.5% by weight or less (0 to 3.5% by weight), preferably 2.5% by weight or less (0 to 2.5% by weight), more preferably 1. 5% by weight or less (0 to 1.5% by weight).

  The system and plant of the present invention can be effectively used for the separation of plastic mixtures (particularly plastic waste) obtained from household waste, industrial waste, and the like. In addition, the plastic granulated product obtained by the present invention can be used as a gasification raw material, fuel, re-raw material, etc. For example, when used for gasification, a useful component can be generated along with combustion or oxidation. it can.

  Hereinafter, the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

Example 1
Plastic veil with a moisture content of about 15% by weight (at least plastics such as PE, PP and PET, magnetic metals such as iron, nonmagnetic metals such as aluminum, nonmagnetic inorganic components such as sand and stone, nonmagnetic particle components, and coated conductors) About 300 kg was supplied to the uniaxial crusher 20 shown in FIG. 2 and crushed to an average diameter of 35 mm. The primary crushed material contained high melting point plastic (PET). 300 kg of primary crushed material is supplied to a rotary kiln type dehumidifier, heated with hot air while rotating an inclined drum, and dried to a water content of about 8% by weight. While supplying air at 30 at a rate of 2000 kg / h, air was supplied at a wind speed of 12 m / sec to separate 209 kg of the plastic component (A) and 70 kg of a crude plastic component containing at least a magnetic metal and a nonmagnetic inorganic component.

  The separated crude plastic component is supplied to the magnetic separator 40 shown in FIG. 4 at a rate of 500 kg / h, the magnetic metal is removed, and the crude plastic component from which the magnetic metal has been removed is continuously supplied to the vibration sieve device. To remove non-magnetic components (mainly inorganic components such as non-magnetic metals, sand and stones, coated conductors, etc.), and 57 kg of the plastic component (B) was selected.

  120 kg of the plastic components (A) and (B) are put into the granulator 50 shown in FIGS. 5 and 6, the stirring blade is rotated at a speed of 630 rpm, a shearing force is applied, and the temperature is generated by rotating frictional heat. It melted and granulated while being heated and rolled at 155 to 160 ° C., and the granulated product was cooled by spraying water using a sprinkling device while being vibrated using a vibrating conveyer capable of passing water. Most of the cooled granulated material had a spherical or ellipsoidal (or spindle-shaped) form, but contained string-like high melting point plastic (PET). The temperature at the end of the conveyor was about 70 ° C.

  The cooled granulated product is secondarily crushed and sized to a maximum diameter (screen size) of 8 mm using the uniaxial crusher 60 shown in FIG. The product was transferred to the product silo while cooling. The weight of the obtained granulated product was 117 kg, and the temperature was 55 ° C.

The obtained granulated product (sized product) has a water content of 1.7% by weight, an angle of repose of 45 °, an average diameter of 3.1 mm, and a bulk density (consolidated bulk density) of 0.52 g / cm ³ . there were. The granulated product did not contain string-like plastic, and contained flat or flaky plastic of 8 mm or less, but was almost spindle or spherical. FIG. 8 shows the particle size distribution of the granulated product.

Example 2
Instead of the plastic bale used in Example 1, a plastic bale with a different recovery route (water content of about 14% by weight, at least plastic such as PE, PP, PET, magnetic metal such as iron, non-magnetic metal such as aluminum, sand, etc. A granulated product was obtained in the same manner as in Example 1 except that a nonmagnetic inorganic component such as stone or a nonmagnetic particle component was used. The obtained granulated product had a water content of 1.6% by weight, an angle of repose of 54 °, an average diameter of 3.4 mm, and a bulk density (consolidated bulk density) of 0.48 g / cm ³ . Moreover, although the granulated product did not contain string-like plastic and contained flat or flaky plastic, it was almost spindle-shaped or spherical. FIG. 9 shows the particle size distribution of the granulated product.

Comparative Example After the primary crushing, the plastic bale is supplied to the wind power sorter of Example 1 without drying, and the secondary crushing is not performed by the uniaxial crusher of Example 1 as in Example 1. To obtain a granulated product. The obtained granulated product has a water content of 3.0% by weight, a bulk density (consolidated bulk density) of 0.27 g / cm ³ , and the granulated product contains many string-like high melting point plastics (PET). The angle of repose was 70 ° or more and the average diameter was 8.0 mm or more, which could not be measured strictly. In addition, the plastics that were not dried were entangled with each other, and crude plastic containing about 60% of foreign matters was generated by wind sorting.

FIG. 1 is a flowchart showing an example of a plastic separation processing system. FIG. 2 is a schematic cross-sectional view showing an example of a uniaxial crusher as a primary crusher. FIG. 3 is a schematic cross-sectional view showing an example of a wind power sorter in the sorting step (c). FIG. 4 is a schematic sectional view showing an example of a magnetic metal sorter in the magnetic component separation step (d-1). FIG. 5 is a schematic plan view showing an example of a granulator in the granulation step (f). FIG. 6 is a schematic cross-sectional view showing the granulator of FIG. FIG. 7 is a schematic sectional view showing an example of a uniaxial crusher in the secondary crushing step (h). FIG. 8 is a graph showing the particle size distribution of the granulated product obtained in Example 1. FIG. 9 is a graph showing the particle size distribution of the granulated product obtained in Example 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 20 ... Uniaxial crusher 21 ... Hopper 23 ... Pusher 24 ... Rotating blade 25 ... Fixed blade 26 ... Screen 30 ... Wind power sorter 31 ... Input port 32 ... Blast nozzle 33 ... Blocking plate 34 ... Suction nozzle 35 ... Net filter 36 ... Branch Board (regulation board)
37 ... Coarse plastic component 38 ... Plastic component 40 ... Metal sorter 41 ... Inlet 42 ... Magnet 43 ... Rotating drum 44 ... Drum type magnetic separator 45 ... Recovery unit 46 ... Guide plate 50 ... Granulator 51 ... Case 52 ... Rotation Blade 60 ... Uniaxial crusher 61 ... Loading port 62 ... Blade 63 ... Rotating blade base 64 ... Rotating blade 65 ... Fixed blade 66 ... Screen

Claims (17)

A system for fractionating the plastic components of plastic mixtures containing volatile liquid component and a non-plastic component, a primary crushing machine for crushing primary: (a) said mixture, the (b) the primary crushed material A drying apparatus for drying ; (c) a wind power sorter for sorting the dried primary crushed material into a plastic component and a crude plastic component containing foreign matters using an air stream; and (d) this and separator for separating plastic components to remove foreign matter from the crude plastics component, and granulator for granulating the plastic components from (f) the wind sorter (c) and separator (d) , (H) A plastic fractionation system comprising a secondary crusher for secondary crushing of the plastic granulated product. The primary crusher (a), the processing system of claim 1 wherein crushing the plastic mixture to the average diameter of 10 to 100 mm. In the drying device (b), the processing system according to claim 1 or 2, wherein drying the primary crushed material below 12 wt% water content. Separator (d) is, (d-1) processing system according to any force from the crude plastics components by utilizing the claims 1-3 which is composed of separator for removing magnetic components. Separator (d) further, (d-2) processing system according to claim 4, wherein utilizing the difference in specific gravity or particle diameter differences from the crude plastics component is composed of a removing device for removing the non-magnetic components . Processing system according to any of claims 1-5, which granulator (f) is, by utilizing the frictional heat to melt the plastic component and granulated. Processing system according to granulator (f) granules produced by, in any one of claims 1 to 6 which comprises a conveyor and a cooling device for cooling and conveying while shaking. The processing system according to claim 7 , wherein the cooling device cools the granulated material by spraying a refrigerant. Secondary crusher (h) is, processing system according to any of claims 1-8 for crushing the granulated product produced by the granulator (f) to the average diameter of 1 to 20 mm. The processing system according to any one of claims 1 to 9, wherein the plastic mixture includes a low melting point plastic component and a high melting point plastic component. Plastic mixture, processing system of claim 6, further comprising a low-melting plastic component meltable, and a high-melting plastic component of the non-fusible by the frictional heat due to frictional heat at the granulator (f). (A) For primary crushing of a plastic mixture containing moisture, a low-melting plastic component that can be melted at a temperature of 50 to 200 ° C., a non-melting high-melting plastic component and a non-plastic component at the above temperature to an average diameter of 20 to 50 mm A primary crusher , (b) a drying device for drying the primary crushed material to a water content of 10% by weight or less, and (c) a crude plastic component including a plastic component and a non-plastic component by wind power. and sorting machine for sorting, (d) and separator for separating plastic components by removing the magnetic component and a non-magnetic component from the crude plastics component, (f) said sorter (c) and separator ( the plastic components from d), a granulator for granulating melted by using a rotating frictional heat while granulated at this granulator, vibration plastic granules Claims comprises a ventable conveyors and the coolant spray device for cooling and conveying while, and (h) Secondary crusher for secondary crushing in the plastic granules average diameter 3~10mm Item 12. The processing system according to any one of Items 1 to 11 . The processing system according to claim 1, wherein the bulk density of the granulated product crushed by the secondary crusher is 0.35 to 0.55 g / cm ³ . The processing system according to any one of claims 1 to 13, wherein the repose angle of the granulated product crushed by the secondary crusher is 60 ° or less.   (A) a primary crusher for primarily crushing a plastic mixture containing a volatile liquid component and a non-plastic component, (b) a drying device for removing the liquid component from the primary crush, and (c) a dried primary crush For separating a plastic component and a crude plastic component containing foreign matter, (d) a separator for removing foreign matter from the crude plastic component to separate the plastic component, and (f) a wind sorter. And a plastic fractionation processing plant comprising a granulator for granulating the plastic component from the separator, and (h) a secondary crusher for crushing the plastic granulated product. The plastic fractionation processing plant according to claim 15, wherein the separator (d) comprises a separator for removing magnetic components from at least (d-1) crude plastic components. A method of fractionating a plastic component from a plastic mixture containing a volatile liquid component and a non-plastic component, the method comprising (a) primary crushing of the mixture, (b) drying the primary crushed material, c) A step of separating the dried primary crushed material into a plastic component and a crude plastic component containing foreign matter using an air flow; and (d) separating the plastic component by removing foreign matter from the crude plastic component. And (f) a step of granulating the plastic component from the sorting step (c) and the separation step (d), and (h) a step of secondary crushing the plastic granulated product. Plastic sorting method.

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