JP2023037773A - Material separation and recovery system and material separation and recovery method for used tile carpet - Google Patents

Abstract

To provide a material separation and recovery system and a material separation and recovery method for a used tile carpet, which are capable of separating and recovering all constituent materials from the used tile carpet with high accuracy.SOLUTION: There is provided a material separation and recovery system for a used tile carpet, the system comprising: a pile layer removing facility for removing a pile layer from the used tile carpet to obtain a material containing a backside support layer; a cutting facility for cutting the material containing the backside support layer; a pulverizing facility for pulverizing the material containing the cut backside support layer; a sorting facility for sorting constituent materials of a pulverized material containing the pulverized backside support layer; and a static elimination facility provided on each of an input side and a discharge side of the sorting facility and removing static electricity charged on the material containing the pulverized back side support layer.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a used tile carpet material separation and recovery system and a material separation and recovery method for separating and recovering constituent materials from a used tile carpet with high accuracy.

Conventionally, tile carpets have been widely used for floors of indoor structures, particularly offices, commercial facilities and residences. A tile carpet is generally composed of a surface fiber layer made of carpet fabric called a pile layer, a backing layer mainly composed of calcium carbonate or the like formed under the fiber layer, and a backing layer formed under the backing layer. and a backing layer containing vinyl chloride resin or the like as a main component.

FIG. 15 shows a schematic diagram of a part of the tile carpet. In FIG. 15, reference numeral 86 denotes a tile carpet, and a backing layer 81 mainly composed of calcium carbonate or the like is formed under a pile layer 79 of fibers. A backing layer 82 is formed. The backing layer 81 and the backing layer 82 are the back support layer 84 that supports the pile layer 79 .

In this way, the pile layer of fibers, the backing layer mainly composed of calcium carbonate, etc., and the backing layer mainly composed of vinyl chloride resin etc. are laminated together, so it is difficult to recycle tile carpets. It is a difficult point. Carpet tiles are not manufactured according to uniform standards. And the thickness of the backing layer differs from product to product. Therefore, the mixing ratio of the resin varies depending on the product, and the amount of the resin such as vinyl chloride and the hardness and thickness of the fibers of the carpet fabric also vary. In this way, the fact that the properties of tile carpet products differ from one another is another factor that makes recycling even more difficult.

As systems for separating and collecting used tile carpet materials, there are methods and systems described in Patent Documents 1 to 3, for example.

On the other hand, in recent years, there is a high level of demand for efforts to achieve the Sustainable Development Goals (SDGs), and separation is more accurate than the methods and systems described in Patent Documents 1 to 3. Need to collect. However, when separating and recovering the materials of the pile layer, backing layer, and backing layer of the used tile carpet, the fibers of the pile layer tend to adhere to the resin. There was a problem that it was difficult to separate and collect in

JP 2003-127140 JP 2013-193011 JP 2021-025170

SUMMARY OF THE INVENTION An object of the present invention is to provide a used tile carpet material separation and recovery system and a material separation and recovery method capable of separating and recovering each constituent material from the used tile carpet with high accuracy.

In order to solve the above-mentioned problems, the used tile carpet material separation and recovery system of the present invention includes a pile layer removing equipment for removing a pile layer from a used tile carpet to obtain a material containing a back side support layer, and a back side support layer containing material. A cutting facility for cutting a material, a fine pulverizing facility for finely pulverizing the cut material containing the backside support layer, a sorting facility for sorting out constituent materials of the finely pulverized material containing the pulverized backside support layer, and the sorting. A material separation and recovery system for used tile carpets, comprising static elimination equipment provided on the input side and discharge side of the equipment, respectively, for removing static electricity charged in the material containing the pulverized backside support layer.

Preferably, the pile layer removing equipment includes a transport mechanism for transporting the used tile carpet, and a cutting cutter for cutting and removing the pile layer of the used tile carpet transported by the transport mechanism. be.

Preferably, a metal detector is provided between the cutting facility and the pulverizing facility to detect metal in the cut backside support layer-containing material.

The sorting equipment is composed of a plurality of sorting devices, and the static elimination equipment is sent to the vicinity of the input port of the pulverized back side support layer-containing material of each sorting device of the plurality of sorting devices and to the next sorting device. It is preferable that the static eliminators are provided in the vicinity of the discharge port of the pulverized backside support layer-containing material.

It is preferable that the plurality of sorting devices are a vibrating screen, a wind sorter and a specific gravity sorter.

It is preferable that the vibrating sieve includes a first vibrating sieve and a second vibrating sieve, and the material containing the pulverized back side support layer classified by the first vibrating sieve is further classified by the second vibrating sieve.

It is preferable that the wind separator is a circulation wind separator.

The plurality of sorting devices are the first vibrating sieve, the second vibrating sieve, the circulating air force sorter, and the specific gravity sorter, and the crushing back side support remaining on the sieve mesh of the first vibrating sieve The layer-containing material is sent to the circulation wind separator, and the pulverized back side support layer-containing material discharged from the heavy load side discharge port of the circulation wind separator is sent to the specific gravity difference separator. It is preferred that they are sorted.

The specific gravity difference sorter includes a perforated screening diaphragm provided at an angle, a blower that blows air toward the perforated screening diaphragm, and an upper portion of the perforated screening diaphragm on the side of a heavy object discharge port. and a rectifying plate, light specific gravity objects move toward the lower end of the selective perforated diaphragm and are discharged from the light object discharge port, and heavy specific gravity objects move toward the upper end direction of the selective perforated diaphragm and are weighted. It is preferable that the device for sorting by specific gravity difference discharges from a substance discharge port, and is configured such that the current plate allows the wind of the blower to flow to the side of the substances having a low specific gravity.

The used tile carpet material separation and recovery method of the present invention uses the used tile carpet material separation and recovery system to separate and recover constituent materials from the used tile carpet. a pile layer removing step of removing a pile layer from a used tile carpet to obtain a back side support layer-containing material; and a cutting step of cutting the back side support layer-containing material.
A fine pulverization step of finely pulverizing the cut material containing the cut back side support layer, and a sorting step of sorting out constituent materials of the pulverized material containing the pulverized back side support layer, wherein in the sorting step, the pulverization A material separation and recovery method for a used tile carpet, including a static elimination step for removing static electricity charged in the material containing the backside support layer.

According to the present invention, it is possible to provide a material separation and recovery system and a material separation and recovery method for a used tile carpet that can separate and recover each constituent material from the used tile carpet with high accuracy. effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic configuration explanatory diagram showing one embodiment of a used tile carpet material separation and recovery system according to the present invention; 1 is a structural schematic diagram of a circulation-type wind separator used in the present invention; FIG. It is a structural schematic diagram of a specific gravity difference sorter used in the present invention. 1 is a flow chart showing an example of steps of a method for separating and collecting used tile carpet materials according to the present invention. It is a photograph which shows the state in each process. It is a photograph which shows the state in each process. It is a photograph which shows the state in each process. It is a photograph which shows the state in each process. It is a photograph which shows the state in each process. 1 is a photograph of recycled tile carpet 1 recycled as product (1) and product (2), and a photograph of recycled tile carpet 2 recycled as product (3). It is a comparison photograph by the presence or absence of the static elimination equipment in a state (G). It is a comparison photograph by the presence or absence of the static elimination equipment in the product (1). It is a comparison photograph by the presence or absence of a straightening plate in a product (1). The photograph on the left shows a state in which 1,000 grains of product (1) are arranged and inspected, and the photograph on the right shows a fiber-attached product found as a result of inspecting 1,000 grains of product (1). It is a partial outline schematic diagram of a tile carpet.

Embodiments of the present invention will be described below, but these embodiments are shown by way of example, and it goes without saying that various modifications are possible without departing from the technical idea of the present invention.

In FIG. 1, reference numeral 10 denotes one embodiment of a used tile carpet material separation and recovery system according to the present invention. Moreover, FIG. 4 is an example of process of the material separation-recovery method of the used tile carpet which concerns on this invention. Description will be made based on FIGS. 1 and 4 and with reference to FIGS. 2 to 3 and 5 to 14. FIG.

The used tile carpet material separation and recovery system 10 is a used tile carpet material separation and recovery system for separating and recovering constituent materials from the used tile carpet with high accuracy. Generally, as shown in FIG. 15, a tile carpet is formed with a backing layer 81 mainly composed of calcium carbonate or the like under a pile layer 79 of fibers, and under the backing layer 81 mainly composed of vinyl chloride resin or the like. A backing layer 82 is formed as a component, and in the present invention, these constituent materials can be separated and collected with high precision. Backing layer 81 and backing layer 82 are referred to herein as backing support layer 84 that supports pile layer 79 .

Examples of the fibers of the pile layer 79 are chemical fibers such as nylon fibers (hereinafter sometimes referred to as "nylon"), but other fibers are also applicable. A constituent material of the backing layer 81 is a filler such as calcium carbonate. An example of the resin of the backing layer 82 is synthetic resin such as vinyl chloride resin. In the following embodiments of the present invention, fibers made of nylon resin are used as an example of the fibers of the pile layer 79, vinyl chloride resin is used as the resin of the backing layer 82, and calcium carbonate (hereinafter referred to as calcium carbonate) is used as the main constituent material of the backing layer. , sometimes called “charcoal calcium”).

The used tile carpet material separation and recovery system 10 removes the pile layer 79 from the used tile carpet 12 to obtain the back side support layer containing material 14 including the back side support layer 84, the pile layer removal equipment 16, and the back side support. A cutting facility 18 for cutting the layer-containing material, a pulverizing facility 22 for finely pulverizing the cut material 20 containing the back side support layer, and a resin grain in the pulverized material 24 containing the pulverized back side support layer. and a static elimination facility 28 that is provided on each of the input side and the discharge side of the sorting facility and removes static electricity charged on the pulverized back side support layer-containing material 24. there is

As the pile layer removing equipment 16, there is provided a conveying mechanism 30 for conveying the used tile carpet 12, and a rotary type for cutting and removing the pile layer 79 of the used tile carpet 12 conveyed by the conveying mechanism 30. and a cutting cutter 32 . In the illustrated example, the used tile carpet 12 is automatically placed on the conveying mechanism 30 one by one by a loading robot 34 . As a result, from the introduction of the used tile carpet 12 to the separation and recovery of the constituent materials, the operation is automatically performed without human intervention.

The cutting cutter 32 is provided with a dust collection hood, which cuts and removes the pile layer 79 while collecting the fibers of the pile layer 79 of the used tile carpet 12 (see FIG. 4). step S100). The collected fibers are sent to a dust collector (not shown). FIG. 5 shows photographs of the state of the used tile carpet 12 in (Z-1), (Z-2) and (Z-3) of FIG.

As the cutting equipment 18, the back side support layer-containing material 14 is cut and roughly cut by passing between a pair of rotating rotary blades 35 and 37, and a known biaxial shredder can be suitably applied. . The back support layer-containing material 14 from which the pile layer 79 has been removed is cut by the cutting equipment 18 (step S102 in FIG. 4). FIG. 6(A) shows a photograph of the state of the cut back side support layer-containing material 14 in FIG. 1(A).

As the pile layer removing equipment 16 and the cutting equipment 18, for example, a tile carpet dismantling system described in Patent Document 3 can be applied.

A metal detector 36 is provided between the cutting equipment 18 and the pulverizing equipment 22 to detect the cut back side support layer containing material 20 containing metal in the cut cut back side support layer containing material 20. (substep SS200 in FIG. 4). Also, the metal detector 36 is provided with a metal discharge port 38 with an opening/closing door, and the detected metals 40 are discharged from the metal discharge port 38 . As the metal detector 36, various commercially available metal detectors 36 are applicable.

The sorting facility 26 is composed of a plurality of sorting devices, and the static elimination facility 28 is provided in the vicinity of an inlet into which the pulverized backside support layer-containing material 24 is put in each of the plurality of sorting devices. ing. The static elimination equipment 28 is also provided near the discharge port of the pulverized back side support layer-containing material, through which the pulverized back side support layer-containing material 24 introduced from the inlet is sorted and sent to the next sorting device. ing.

Various known static eliminators can be applied as the static eliminator 28 . An example of the static eliminator 28 suitable for the present invention is, for example, a dual I.C.C. controlled static eliminator manufactured by KEYENCE CORPORATION.

In the illustrated example, the sorting equipment 26 is configured to include a first vibrating screen 42 and a second vibrating screen 44 as vibrating screens, a wind sorter 46 and a specific gravity sorter 48 . As the wind sorter 46, an example of a circulation wind sorter is shown.

The cut backside support layer-containing material 20 for which no metal was detected by the metal detector 36 between the cutting facility 18 and the pulverizing facility 22 is conveyed to the pulverizing facility 22 by a transfer conveyor 50 . In the pulverizing equipment 22, the cut backside support layer-containing material 20 is pulverized (step S104 in FIG. 4).

As the fine pulverization equipment 22, a large number of rotary blades 51 are provided, and the rotary blades 51 are rotated at high speed, so that the cut back side support layer containing material 20 can be finely pulverized back side support layer containing material 24. If so, any known pulverizing device can be applied. In particular, a fine pulverizing device capable of finely pulverizing the back side support layer-containing material 24 of 3 mm or less is preferable, and a fine pulverizing device having a rostr sieve mesh diameter of 3 mm is preferable. Examples of the fine pulverizing equipment 22 applicable to the present invention include, for example, Horai Co., Ltd.'s HA series "fine pulverizer mesh mill".

The pulverized backside support layer-containing material 24 pulverized by the pulverizing equipment 22 (pulverized to 3 mm or less in the embodiment of the present specification) is pumped to the next step by the air blower 52 . A photograph of the pulverized backside support layer-containing material 24 in FIG. 1(B) is shown in FIG. 6(B).

Numeral 54 is a cyclone, which discharges the pulverized backside support layer-containing material 24 that has been pressure-fed from the lower rotary valve and puts it into the first vibrating screen 42 . Also, at this time, light fibers are collected and sent to a dust collection facility (not shown). At the time of input, static electricity charged in the pulverized backside support layer-containing material 24 to be input is removed by the static elimination equipment 28 provided at the input port of the first vibrating screen 42 (substep in FIG. 4 SS202). The purpose of the first vibrating screen 42 is to screen particles of 1 mm or less from the pulverized backside support layer-containing material 24, which is a mixture of vinyl chloride, calcium carbonate and fibers of 3 mm to 0 mm.

A first vibrating screen process is performed in the first vibrating screen 42 (step S106 in FIG. 4). The pulverized back side support layer-containing material 24 (3 mm to 1 mm PVC + fiber on the screen) remaining on the sieve screen of the first vibrating screen 42 is sent to the circulation type wind separator 46, but the first vibrating screen 42 A static elimination device 28 is also provided at the discharge port of the material on the sieve, and static electricity charged on the discharged pulverized back side support layer-containing material 24 is removed (substep SS204 in FIG. 4). A photograph of the state of the pulverized backside support layer-containing material 24 in FIG. 1(C) is shown in FIG. 6(C).

The pulverized back side support layer-containing material 24 (1 mm to 0 mm under the screen + calcium carbonate + fiber) that fell under the screen of the first vibrating screen 42 is thrown into the second vibrating screen 44 . A second vibrating screen process is performed in the second vibrating screen 44 (sub-step SS208 in FIG. 4). At this time, the static electricity charged on the crushed back side support layer-containing material 24 is removed by the static elimination equipment 28 provided at the outlet of the first vibrating screen 42 and the inlet of the second vibrating screen 44 (Fig. 4 substep SS206). The purpose of the second vibrating screen 44 is to screen particles of 1 mm or less from the pulverized backside support layer-containing material 24, which is a mixture of 1 mm to 0 mm of vinyl chloride, calcium carbonate and fibers. A photograph of the state of the pulverized backside support layer-containing material 24 in FIG. 1(D) is shown in FIG. 7(D).

The pulverized backside support layer-containing material 24 remaining on the sieve screen of the second vibrating screen 44 (fine fibers contained in 1 mm to 0 mm on the screen) is collected. FIG. 7(E) shows a photograph of the state of the pulverized backside support layer-containing material 24 of fine fibers collected in FIG. 1(E).

In addition, a static elimination device 28 is also provided at the discharge port for discharging the material under the screen of the second vibrating screen 44, and the material under the screen of the second vibrating screen 44 (1 mm to 0 mm under the screen + calcined powder) Also, static electricity is removed (sub-step SS210 in FIG. 4). The material under the sieve screen of the second vibrating screen 44 is precisely sorted vinyl chloride + carbon calcium powder, and is collected as a product (3). FIG. 7(F) shows a photograph of the state of the product (3), which is the pulverized backside support layer-containing material 24 recovered in FIG. 1(F). About 100% of calcium carbonate, which is a constituent material of the used tile carpet, is recovered as this product (3). Although some powdered PVC is mixed in, most of it is calcium carbonate, so there is no problem in remanufacturing.

In the circulation-type wind separator 46, the pulverized backside support layer-containing material 24 (3 mm to 1 mm vinyl chloride+fiber) remaining on the sieve screen of the first vibrating screen 42 is wind-sorted (step S108 in FIG. 4).

FIG. 2 shows a schematic structural diagram of the circulation-type wind separator 46. As shown in FIG. In the circulation-type wind separator 46, the pulverized back side support layer-containing material 24 introduced from the inlet 56 is blown up by the wind from the sirocco fan 58 provided inside the circulation-type wind separator 46, and light specific gravity objects 60 are sorted out to the light-weight side discharge port 88, and the heavy specific gravity side 62 is sorted out to the heavy-side discharge port 90, respectively. As the circulation-type wind separator 46, a known circulation-type wind separator can be applied. When the pulverized back side support layer-containing material 24 is charged, static electricity charged in the pulverized back side support layer-containing material 24 to be charged is removed by the static elimination equipment 28 provided near the inlet 56 (Fig. 4 substep SS212).

In the circulation type wind sorter 46, fibers are sorted and collected from the light-weight material side discharge port 88 on the light-weight material side. FIG. 8(G) shows a photograph of the state of the pulverized backside support layer-containing material 24 of fibers recovered in FIG. 1(G). In FIG. 1G, only fibers are collected. The fibers are, for example, nylon fibers. The fibers collected in (G) of FIG. 1 are collected together with the fibers collected by the dust collecting equipment in step S110 of FIG. It becomes the product of the processed fiber. The fibers collected by the dust collection equipment are fibers with extremely low specific gravity such as cotton, and the fibers sorted on the light weight side of the wind sorter 46 are the fibers collected by the dust collection equipment. It is a fiber with a relatively large specific gravity. The recovered fiber product is free of adhesion of vinyl chloride grains and the like because static electricity is removed in each process, and is a fiber product sorted with high accuracy. For example, if the fibers are nylon fibers, the nylon fibers sorted with high accuracy according to the present invention can be reused for various uses of nylon. It can be reused as a raw material for antifoaming agents such as (registered trademark).

The discharge port 88 on the light-weight side is not provided with the static elimination equipment 28 because the fibers sorted to the light-weight side are only collected and are not turned into products. On the other hand, the heavy goods side discharge port 90 where the PVC grains ((H) in FIG. 1) are sorted is provided with a static elimination equipment 28, and the discharged pulverized back side support layer containing material 24 is charged with static electricity. is removed (substep SS214 of FIG. 4).

The pulverized backside support layer-containing material 24 (PVC grains of 3 mm to 1 mm) that has been sorted into PVC grains is pumped to the next step by a blower 78 for further cleaning. FIG. 8(H) shows a photograph of the pulverized backside support layer-containing material 24 selected in FIG. 1(H).

Reference numeral 80 denotes a cyclone, which discharges the pulverized back side support layer-containing material 24 of PVC grains that has been pumped from the lower rotary valve and puts it into the specific gravity difference sorter 48 . Also, at this time, light fibers are collected and sent to a dust collection facility (not shown). The purpose of the specific gravity sorter 48 is to carefully select PVC grains of 3 mm to 1 mm. The specific gravity sorter 48 performs specific gravity sorting (step S110 in FIG. 4).

A structural schematic diagram of the specific gravity difference sorter 48 is shown in FIG. The specific gravity difference sorter 48 includes a sorting porous vibrating plate 66 provided at an angle in a dust collection hood 64 , an inlet 68 into which the pulverized back side support layer-containing material 24 is introduced, and the sorting porous vibrating plate 66 . and a rectifying plate 76 provided on the upper part of the selective porous vibrating plate 66 on the heavy object discharge port side. As the specific gravity sorter 48, a known specific gravity sorter 48 can be used, and for example, an SH type specific gravity sorter manufactured by Harada Sangyo Co., Ltd. is suitable. As the perforated selection diaphragm 66, a perforated selection diaphragm 66 having a saw-toothed net when viewed from the side is suitable. In the present invention, it is preferable to attach the rectifying plate 76 shown in the figure to a known specific gravity difference sorter.

When the pulverized backside support layer-containing material 24 is introduced from the inlet 68 onto the screen of the perforated vibrating plate 66 for selection, the air generated by the blower 70 moves the material with low specific gravity toward the lower end of the perforated vibrating plate for selection 66, thereby It is configured such that the heavy objects discharged from the discharge port move toward the upper end of the perforated screening diaphragm 66 and are discharged from the heavy object discharge port. The rectifying plate 76 is configured to allow the wind from the blower to flow toward the lighter specific gravity object. This wind flow can efficiently remove the fibers adhering to the vinyl chloride resin.

Further, the pulverized backside support layer-containing material 24 passing through the screening perforated vibrating plate 66, which is a screen, is discharged from the mesh-passed material discharge port 72. As shown in FIG. Further, the specific gravity difference sorter 48 is provided with a heavy specific gravity material discharge shutter 74, and the heavy specific gravity material is guided to the heavy material discharge port.

The inlet 68 of the specific gravity sorter 48, the outlet for lightweight materials, the outlet for heavy materials, and the outlet 72 for materials passed through the net are each provided with static elimination equipment 28, and the reverse side of pulverization, which is the discharged vinyl chloride grains, is provided. Static electricity on the support layer-containing material 24 is removed (substeps SS214 and SS216 in FIG. 4).

The pulverized back side support layer-containing material 24 (3 mm to 1 mm vinyl chloride grains) discharged from the heavy object discharge port of the specific gravity difference sorter 48 and neutralized is applied to the metal detector 36, and the detected metals are detected through the metal discharge port 38. discharged from The 3 mm to 1 mm PVC grains discharged from this heavy article discharge port are carefully selected and collected as the product (1) (step S112 in FIG. 4). FIG. 8(I) shows a photograph of the state of the product (1) of 3 mm to 1 mm or less vinyl chloride grains, which is the material 24 containing the pulverized backside support layer recovered in FIG. 1(I). The product (1) thus collected can be reused for various PVC products.

The pulverized backside support layer-containing material 24 (vinyl chloride grains of 1 mm or less under the mesh) discharged from the mesh passage discharge port 72 after passing through the sorting porous diaphragm 66 was applied to the metal detector 36 and detected. Metals are discharged from the metal discharge port 38 . The PVC grains of 1 mm or less under the screen discharged from the net-passing material discharge port 72 are carefully selected and collected as the product (2) of 1 mm or less PVC grains (step S112 in FIG. 4). FIG. 9(J) shows a photograph of the state of the product (2) of 1 mm or less vinyl chloride grains, which is the material 24 containing the pulverized backside support layer recovered in FIG. 1(J). The product (2) thus recovered can be reused for various PVC products.

The pulverized back side support layer-containing material 24 discharged from the light weight material discharge port of the specific gravity difference sorter 48 is PVC grains with fibers attached, so it is returned to the fine pulverization equipment 22 and finely pulverized again. A photograph of the state of the pulverized backside support layer-containing material 24 in (K) of FIG. 1 is shown in FIG. 9 (K).

In this manner, according to the used tile carpet material separation and recovery system and material separation and recovery method of the present invention, all constituent materials can be separated and recovered from the used tile carpet with high accuracy.

In the past, it was not possible to recycle 100% of sorted resin (vinyl chloride), which is a constituent material of tile carpets, and recycling was carried out to the extent that it was increased to a pure raw material. The reason is that at least 1% of the fibers inevitably remain even if the conventional method is used for sorting. In the present invention, the PVC grains of 3 mm to 1 mm or less in product (1) and the PVC grains of 1 mm or less in product (2) were successfully removed almost completely from the fibers, making it possible to recycle them as pure raw materials.

The photograph on the left side of FIG. 10 is a photograph of a recycled tile carpet 1 recycled with the product (1) and the product (2) obtained in the embodiment of the present invention described above. About 3 mm to 1 mm or less PVC of product (1) and 1 mm or less of PVC of product (2), the fibers are almost completely removed (about 0.2% even if there is fiber residue), so recycled PVC can be recycled as a pure raw material.

The photograph on the right side of FIG. 10 is a photograph of recycled tile carpet 2 recycled as product (3). Regarding the product (3) powder, it was 100% recyclable as a pure raw material, although some fibers were mixed in as a by-product of the equipment of the system of the present invention. As a point, compared with the conventional recycled product, there is an effect of removing static electricity from the static eliminator.

FIG. 11 shows a comparison photograph in the state (G) of FIG. 1 with and without the static elimination equipment 28 . In the state (G) of FIG. 1, if the static elimination equipment 28 is not installed, a state in which PVC grains are mixed as shown in the photograph on the left side of FIG. 11 will occur. On the other hand, if the static elimination equipment 28 is provided, fibers free from mixed vinyl chloride grains can be recovered as shown in the photograph on the right side of FIG.

FIG. 11 shows a comparison photograph of the product (1) obtained above with and without the static elimination equipment 28 . In the product (1) obtained above, if the static elimination equipment 28 is not provided, a very small amount of fibers are mixed in, as shown in the photograph on the left side of FIG. 12 . On the other hand, if the static elimination equipment 28 is provided, as shown in the photograph on the right side of FIG. 12, vinyl chloride grains free of fibers are recovered.

FIG. 13 shows a comparison photograph of the specific gravity sorter 48 with and without the current plate 76 . In the above-obtained product (1), without the current plate 76 of the specific gravity sorter 48, as shown in the photograph on the left side of FIG. On the other hand, if the rectifying plate 76 of the specific gravity sorter 48 is present, as shown in the photograph on the right side of FIG. Even without the rectifying plate 76 of the specific gravity sorter 48, it is possible to collect the PVC grains with a high degree of accuracy so that it can be used as a product. PVC grains can be recovered.

FIG. 14 shows a state in which 1000 grains were inspected for the product (1) obtained as described above. The photograph on the left shows a state in which 1,000 grains of product (1) are arranged and inspected, and the photograph on the right shows a fiber-attached product found as a result of inspecting 1,000 grains of product (1). 1,000 PVC grains of the obtained product (1) were inspected, and two grains were found to have adhered fibers. From this, it can be seen that the fiber adhesion rate was 0.2%, and the fibers were almost completely removed in the present invention.

10: Used tile carpet material separation and recovery system according to the present invention, 12: Used tile carpet, 14: Back side support layer containing material, 16: Pile layer removal equipment, 18: Cutting equipment, 20: Cut back side support layer containing Material, 22: fine pulverization equipment, 24: pulverized back side support layer containing material, 26: sorting equipment, 28: static elimination equipment, 30: conveying mechanism, 32: cutting cutter, 34: input robot, 35, 37: rotary blade, 36 : Metal detector, 38: Metal discharge port, 40: Metals, 42: First vibrating screen, 44: Second vibrating screen, 46: Air force sorter, 48: Specific gravity difference sorter, 50: Conveyor, 51: Rotary blade, 52, 78: Air blower, 54, 80: Cyclone, 56, 68: Input port, 58: Sirocco fan, 60: Light specific gravity object, 62: Heavy specific gravity object, 64: Dust collection hood, 66: Sorting perforation Diaphragm 70: Blower 72: Mesh-passing material discharge port 74: Heavy specific gravity material discharge shutter 76: Straightening plate 79: Pile layer 81: Backing layer 82: Backing layer 84: Back support layer 86 : tile carpet, 88: light weight side discharge port, 90: heavy weight side discharge port.

Claims (10)

A pile layer removing equipment for removing the pile layer from the used tile carpet to obtain a material containing the back side support layer;
a cutting facility for cutting the material containing the backside support layer;
a pulverizing facility for pulverizing the cut backside support layer-containing material;
a sorting facility for sorting constituent materials of the pulverized material containing the pulverized backside support layer;
A static elimination device provided on each of the input side and the discharge side of the sorting device and removing static electricity charged on the pulverized back side support layer containing material;
including,
Material separation and recovery system for used carpet tiles. The pile layer removing equipment is
a transport mechanism for transporting the used tile carpet;
a cutting cutter for cutting and removing the pile layer of the used tile carpet conveyed by the conveying mechanism;
The used tile carpet material separation and recovery system according to claim 1, comprising: 3. The used tile carpet material according to claim 1 or 2, wherein a metal detector is provided between said cutting equipment and said pulverizing equipment to detect metal in said cut back side support layer containing material. Separation and collection system. The sorting equipment is composed of a plurality of sorting devices,
The static elimination equipment
A static eliminator provided in the vicinity of the inlet of the pulverized back side support layer-containing material of each of the plurality of sorting devices and in the vicinity of the outlet of the pulverized back side support layer-containing material sent to the next sorting device, respectively. The material separation and recovery system for used tile carpets according to any one of claims 1 to 3. 5. The used tile carpet material separation and recovery system according to claim 4, wherein said plurality of sorting devices are a vibrating screen, a wind sorter and a specific gravity sorter. 6. The vibrating screen according to claim 5, wherein the vibrating screen comprises a first vibrating screen and a second vibrating screen, and the material containing the pulverized backside support layer classified by the first vibrating screen is further classified by the second vibrating screen. Material separation and recovery system for used carpet tiles. 7. The used tile carpet material separation and recovery system according to claim 5 or 6, wherein said wind separator is a circulation type wind separator. The plurality of sorting devices are the first vibrating sieve, the second vibrating sieve, the circulating air force sorter, and the specific gravity sorter, and the crushing back side support remaining on the sieve mesh of the first vibrating sieve The layer-containing material is sent to the circulation wind separator, and the pulverized back side support layer-containing material discharged from the heavy load side discharge port of the circulation wind separator is sent to the specific gravity difference separator. 8. The system for separating and collecting used tile carpet material according to claim 7, wherein the used tile carpet is sorted. The specific gravity difference sorter is
a sorting perforated diaphragm provided at an angle;
a blower blowing air toward the perforated selection diaphragm;
a rectifying plate provided at the upper part of the selective perforated vibration plate on the side of the heavy object discharge port;
light specific gravity objects move toward the lower end of the selective perforated diaphragm and are discharged from the light object discharge port, and heavy specific gravity objects move toward the upper end direction of the selected perforated diaphragm and are discharged from the heavy object discharge port A used tile according to any one of claims 5 to 8, which is a specific gravity sorting device adapted to discharge, wherein the rectifying plate allows the wind of the blower to flow to the light specific gravity side. Carpet material separation and recovery system. A material separation and recovery method for a used tile carpet, wherein the used tile carpet material separation and recovery system according to any one of claims 1 to 9 is used to separate and recover constituent materials from the used tile carpet,
A pile layer removing step of removing the pile layer from the used tile carpet to obtain a material containing the back side support layer;
a cutting step of cutting the material containing the backside support layer;
a pulverizing step of pulverizing the cut backside support layer-containing material;
a selection step of selecting constituent materials of the pulverized material containing the pulverized backside support layer;
including
In the sorting step, including a static elimination step of removing static electricity charged on the pulverized back side support layer containing material,
A material separation and recovery method for used tile carpets.

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