JPH1119934A - Device for separately recovering waste plastic bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To separate and recover waste plastic vessels for recycling use. SOLUTION: A waste plastic vessel conveyed from a waste plastic vessel accepting part passes through a conveying pipe 7a and then a conveying pipe 7b, in the midway during its conveying through which its color is detected with a color detector 9 and then its material is detected with a material detector 11. Next, the waste plastic vessel is conveyed to an assorting part B equipped with an assorting compartment 13 and a foreign matter compartment 40. In response to the information of colors and materials obtained with the detectors 9 and 11 in the midway of the conveying pipe 7b, the waste plastic vessels conveying in an assorting passage 43 are blown with the airs injected from the nozzle 1A 14 and from a nozzle 1B 15 into an assorting compartment 1 13a, an assorting compartment 2 13b and the like so as to be assorted and recovered. Further, waste plastic vessels, which do not reach the standard of a vessel, is discharged to a foreign matter compartment 40. Since eddy current develops in the conveying pipes 7a and 7b by the action of an eddy current former 12 provided in the conveying pipe 7a, the waste plastic vessels are aligned at certain intervals and conveyed, resulting in executing easy detection and assortment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for collecting waste plastic containers (hereinafter referred to as "waste plastic containers") used for collecting waste, and more particularly, to a method for reusing or recycling recycled plastic containers. The present invention relates to a separation and collection device for separating and collecting fuel and the like.

[0002]

2. Description of the Related Art In order to reuse waste plastic containers or reuse them as recycled resources or as fuels, they must be classified into materials, colors, types and the like according to the applications.

Japanese Unexamined Patent Application Publication No. 8-99317 discloses a waste plastic container collecting apparatus that separates used and collected waste plastic containers by type of plastic material to reduce the volume (hereinafter referred to as “prior art”). ). However, the prior art does not describe separation and alignment of waste plastic containers.

[0004]

Generally, in order to separate waste plastic containers, these waste containers must be separated and arranged one by one, materials and the like must be detected, and sorting must be performed based on the information. In particular, it is not easy to individually separate and arrange the plastic bottle or the mixture of the plastic bottle and the plastic tray collected by compression, and there is a problem that the apparatus becomes large-scale. These problems hindered the development of recycling plastic waste containers.

[0005] Plastics, for example, if they are waste plastic bottles, depending on the material, besides polyethylene terephthalate bottles (hereinafter referred to as "PET bottles"), polyvinyl chloride bottles (hereinafter referred to as "PVC bottles"), polyethylene Bottles (hereinafter referred to as “PE bottles”) and polypropylene bottles (hereinafter referred to as “PP bottles”). The same applies to other waste plastic containers such as trays. The recycling of such waste plastic containers generally includes material recycling, which recycles them as recycled resources, and thermal recycling, which uses them as fuel.

When subjected to thermal recycling, PV which may generate harmful dioxins during combustion
Chlorine-containing plastics such as C must be removed. Therefore, an object of the present invention is to solve the above-mentioned problems,
An object of the present invention is to provide an apparatus for separating and collecting waste plastic containers, which can significantly reduce the cost of collecting and intermediate processing of waste plastic containers and obtain good quality recycled resources.

[0007]

According to the first aspect of the present invention,
A waste plastic container receiving unit, a waste plastic container sorting unit, and a transport unit provided in the waste plastic container receiving unit and the waste plastic container sorting unit, wherein the transport unit includes the waste plastic container receiving unit and the waste A conveying path comprising a conveying pipe or a conveying groove provided through the plastic container sorting section; an air conveying means for conveying the waste plastic container by pneumatic pressure through the conveying path; and an eddy for generating an eddy air flow in the conveying pipe. Airflow generating means, the waste plastic container sorting section includes a material detector and a color detector, and the waste plastic container can be classified by material and color based on detection results of the material detector and the color detector. Is characterized in that

According to a second aspect of the present invention, there is provided a waste plastic container receiving section, a waste plastic container sorting section,
The waste plastic container receiving section and the transport section provided in the waste plastic container sorting section, the transport section is provided from a transport pipe or a transport groove provided through the waste plastic container receiving section and the waste plastic container sorting section. Transport path, air transport means for transporting the waste plastic container by air pressure through the transport path, and vortex air flow generating means for generating vortex air flow in the transport pipe, the waste plastic container sorting section , A material detector, and means for separating and eliminating a waste plastic container made of chlorine-containing plastic detected by the material detector.

The invention described in claim 3 is the first or second invention.
In the apparatus described above, the waste plastic container receiving portion includes a storage container into which the transfer pipe is inserted, and air blowing means for jetting air to the waste plastic container in the storage container to cause convection, It is characterized in that the waste plastic container can be fed into the transport tube from the open end of the transport tube by separating the waste plastic containers individually by injecting air into the waste plastic container in which a plurality of waste plastic containers are solidified. Things.

[0010]

Next, an embodiment of the present invention will be described with reference to the drawings. [Embodiment 1] FIG. 1 is a sectional view showing a receiving portion of a waste plastic container sorting and collecting apparatus according to an embodiment of the present invention. In FIG. 1, 1 is a hopper, 2 is a waste plastic container, 3 is a sieving screen, 4 is a storage container, 5 is an air hole, 6
Denotes an air pipe, and 7a denotes a transport pipe.

FIG. 2 is a plan view showing a sorting section of the waste plastic container separating and collecting apparatus according to the embodiment of the present invention.
2, 7a and 7b are conveying pipes, 8 is a first passage counter, 9 is a color detector, 10 is a second passage counter, 11 is a material detector, 12 is an eddy current generator, 13 is a sorting section, 13a Is a sorting section (1), 13b is a sorting section (2), 14 is a sorting nozzle 1A, 15 is a sorting nozzle 1B, 16 is a light counter, 17 is an exhaust valve A, 1
8 is an exhaust valve B. 40 is a foreign matter section, 43 is a groove-shaped sorting passage, 44 is an exhaust valve C, 45 is a suction blower, 46
Indicates an exhaust pipe A, 47 indicates an exhaust pipe B, and 48 indicates an exhaust pipe C.

FIG. 3 is a sectional view taken along the line AA of FIG. 2 showing a sorting section of the waste plastic container sorting and collecting apparatus according to the embodiment of the present invention. In FIG. 3, 19 is a sorting section 1A,
20 is a sorting section 1B, 21 is above the section valve 1A, 22 is below the section valve 1A, 23 is above the section valve 1B, and 24 is the section valve 1B.
Below, 25 is a storage section, 26 is a sorting valve 1B, 14 is a sorting nozzle 1A, 28 is a sorting valve 1B, and 15 is a sorting nozzle 1B.

FIG. 4 is a sectional view taken along the line BB of FIG. 2 showing a sorting portion of the waste plastic container separating and collecting apparatus according to the embodiment of the present invention. 4, reference numeral 40 denotes a foreign matter partition, 41 denotes a foreign matter partition valve, 42 denotes foreign matter, 46 denotes an exhaust pipe A, and 47 denotes an exhaust pipe B.

FIG. 5 is an explanatory diagram showing a state of transporting a transported article by an eddy current according to the embodiment of the present invention. FIG.
In the figure, 50 indicates a flow of air. As shown in the drawing, in a waste plastic container receiving portion A, a storage container 4 having a hopper 1 at an upper part is provided with a transfer pipe 7 from outside to inside.
a is inserted. The tip of the transfer pipe 7a is the storage container 4.
Open inside. As shown in FIG. 2, the terminal end of the transport pipe 7a is connected to the transport pipe 7b. An eddy current generator 12 having a special shape for converting the air flow into an eddy air flow is provided at the end of the transport pipe 7b. The end of the transport pipe 7b is connected to the waste plastic container sorting section B. A suction blower 45 is provided at the end of the sorting section B. As described above, the suction mechanism of the waste plastic container 2 is configured, and the waste plastic container 2 is separated from the storage container 4 by the suction blower 45 via the conveying pipes 7a and 7b and the sorting unit B toward the end of the sorting unit B. It is designed to be transported toward. The exhaust side of the suction blower 45 is connected to the air hole 5 provided at the center bottom of the storage container 4 via the air pipe 6 and is used for the blow-up convection of the waste plastic container 2.

The above-mentioned vortex air generator 12 is provided with a conveying pipe 7.
It has a function of generating an eddy air current on the inner wall in a and 7b to transport the waste plastic container 2 in a semi-floating state. Therefore,
As shown in FIG. 5, the air flow 50 in the transport pipes 7a and 7b spirally flows in the transport pipes 7a and 7b by the vortex airflow generator 12, and the waste plastic containers 2 are separated from each other at regular intervals. It is arranged and transported in a state where it is in a state.
In addition, the vortex airflow generators 12 can be accurately separated one by one at a high speed regardless of the collapse of the waste plastic container 2 or the like. Therefore, the waste plastic containers 2 are individually detected one by one,
In the present invention that performs the sorting based on the result, the eddy current generator 12 provides an extremely useful function and effect.

Next, the processing steps of the waste plastic container will be described. As shown in FIG. 1, first, the waste plastic container 2 is supplied to the hopper 1 of the receiving section A. The supplied waste plastic container 2 is sieved by a sieve 3 and the waste plastic container 2 having a size smaller than a predetermined size falls into a storage container 4. Air introduced from the exhaust side of the suction blower 45 through the air pipe 6 blows up the waste plastic container 2 from the air hole 5 at the center bottom of the storage container 4 to make it convection. Thus, the waste plastic container 2 approaching the vicinity of the open end of the transport pipe 7a is sucked into the transport pipe 7a and transported by the action of the suction mechanism. The arrows in FIGS. 1 and 2 indicate the transport direction of the waste plastic container 2. Further, the waste plastic container 2 which has been compressed and tied and conveyed to the storage container 4 is blown up by the air from the air hole 5 so that the tied cord and the clumped state are separated and separated, so that the individual plastic containers are separated. , Can enter the transfer pipe 7.

The waste plastic container 2 having a size exceeding the sieve 3 which has not been sieved is removed from this processing step and crushed by means separately prepared. Next, the waste plastic container 2 is transported to the sorting section B. FIG.
As shown in the figure, a first passage counter 8, a color detector 9, a second passage counter 10, and a material detector 11 are provided in the middle of the transport pipe 7b. When the waste plastic container 2 passes through the first passage counter 8 while being transported through the transport pipe 7b, the color detector 9 is activated, and the color of the waste plastic container 2 is detected. As the color detector 9, a color CCD camera and a color sensor by image processing are used (not shown). Next, when the material passes through the second passage counter 10, the material detector 11 is activated, and the material is detected. As the material detector 11, an infrared spectrum detector that projects near-infrared rays onto the waste plastic container 2, detects the material of the plastic based on a difference in absorption spectrum, and determines the type of the plastic is used (not shown).

The sorting section B includes sorting sections (1) 13a,
(2) A plurality of sorting sections 13 including the 13b and a foreign substance section 40 are provided, and the sorting passage 43 is provided over the entire length thereof.
Is provided. The sorting passage 43 has a groove-like structure made of a slippery material, so that the waste plastic container 2 can be smoothly transported by the airflow during the passage. Further, the waste plastic container 2 includes the vortex airflow generator 1 as described above.
By the action of 2, since the sheets are conveyed while being arranged at a certain interval, the sorting is easily performed.

The transferred waste plastic container 2 is sorted into a sorting section and a foreign matter section according to the information on the color and the material by the detectors 9 and 11 in the middle of the transport pipe 7b. For example, the waste plastic container 2 that satisfies a certain standard from the information and is determined to conform to the sorting section (1): 13a.
Are sorting nozzles 1A: 14 and sorting nozzles 1B:
One of 15 operates in conjunction with the light counter 16 and blows away the waste plastic container 2 to the sorting section (1): 13a. The exhaust valve A: 17 and the exhaust valve B: 18
This is for sucking (negative pressure) one of the sorting sections 1A: 19 and 1B: 20 and opening the other to the atmosphere, and this switching is performed at a constant cycle. Thereby, the waste plastic container 2 is divided into the sections 1A:
Section 19 or Section 1B: Section (1): 13 via section 20
a, and is thus sorted.

The exhaust valve C: 44 in front of the suction blower 45 shown in FIG. 2 is interlocked with the foreign matter partition valve 41 shown in FIG. 4, and it is determined from the color and material information that it does not belong to any sorting section. The foreign matter 42 that has been removed cannot fall in the sorting section 13 and advances through the sorting passage 43 to move to the foreign matter section 4 at the end.
Fall to zero. In the foreign matter section 40, usually, the exhaust valve C: 4
4 (see FIG. 2), the exhaust valve C: 44 is closed at a constant period to bring the pressure to the atmospheric pressure, and at the same time, the foreign matter partitioning valve 41 is opened to discharge the foreign matter 42 to the foreign matter compartment 40. . Although the sorting passage 43 is configured to be transported by an air flow, a transport device such as a belt conveyor may be used instead.

[Embodiment 2] Embodiment 1 is an example of the case where material recycling is performed, and a plurality of sorting sections are provided. On the other hand, in the application of thermal recycling, only the detection of chlorine-containing plastics such as PVC may be performed by the material detector. Therefore, in the present embodiment, the object can be achieved if only the waste plastic container not containing the chlorine-containing plastic is discharged to the sorting section for sorting. Remaining, waste plastic containers containing chlorine-containing plastics are rejected to the foreign material compartment. It goes without saying that the sorting section and the foreign substance section are equivalent even if they are interchanged.

[0022]

As described above, according to the present invention, in the recycling of waste plastic containers, the waste plastic containers conveyed after being compressed, tied and unwrapped can be accurately separated regardless of the collapse of the containers. Can be separated at high speed one by one, so that waste plastic containers such as waste plastic bottles and waste plastic trays can be efficiently separated and collected according to their uses, and recycling costs including reduction of transportation costs can be reduced. Can be significantly reduced, and thus
A useful effect is provided.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a receiving portion of a waste plastic container separation and collection device according to an embodiment of the present invention.

FIG. 2 is a plan view showing a sorting unit of the waste plastic container separation and collection device according to the embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2 showing a sorting unit of the waste plastic container sorting and collecting apparatus according to the embodiment of the present invention.

FIG. 4 is a sectional view taken along the line BB of FIG. 2 showing a sorting unit of the waste plastic container separation and recovery device according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram showing a state of transporting a transported object by an eddy current according to the embodiment of the present invention.

[Explanation of symbols]

 A: Waste plastic container receiving unit B: Waste plastic container sorting unit 1: Hopper 2: Waste plastic container 3: Screen (sieving) 4: Storage container 5: Air hole 6: Air piping 7a, 7b: Conveying tube 8: First Pass counter 9: Color detector 10: Second pass counter 11: Material detector 12: Eddy current generator 13: Sorting section 13a: Sorting section (1) 13b: Sorting section (2) 14: Sorting nozzle 1A 15: Sorting Nozzle 1B 16: Light counter 17: Exhaust valve A 18: Exhaust valve B 19: Sorting section 1A 20: Sorting section 1B 21: Upper section valve 1A 22: Lower section valve 1A 23: Upper section valve 1B 24: Separation valve Bottom 1B 25: Storage compartment 26: Sorting valve 1B 28: Sorting valve 1B 40: Foreign material compartment 41: Foreign material compartment valve 42: Foreign material 43: Sorting passage 44: Exhaust valve C4 : Suction blower 46: exhaust pipe A 47: exhaust pipe B 48: exhaust pipe C 50: eddy stream

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI // B29K 101: 00 105: 26 (72) Inventor Takashi Noto 1-2-1, Marunouchi 1-chome, Chiyoda-ku, Tokyo Nippon Steel Pipe Co., Ltd. Inside

Claims (3)

[Claims] 1. A waste plastic container receiving part, a waste plastic container sorting part, and a transport part provided in the waste plastic container receiving part and the waste plastic container sorting part, wherein the transport part is provided with the waste plastic container. A conveying path comprising a receiving pipe and a conveying pipe or a conveying groove provided through the receiving section and the waste plastic container sorting section, air conveying means for conveying the waste plastic container by pneumatic pressure through the conveying path, and a vortex in the conveying pipe. An eddy current generator for generating the waste plastic container, the waste plastic container sorting section includes a material detector and a color detector, and the material of the waste plastic container is determined based on a detection result of the material detector and the color detector. Waste plastic that can be separated by color Separate collection device for stick containers. 2. A waste plastic container receiving section, a waste plastic container sorting section, and a transport section provided in the waste plastic container receiving section and the waste plastic container sorting section, wherein the transport section includes the waste plastic container. A conveying path comprising a receiving pipe and a conveying pipe or a conveying groove provided through the receiving section and the waste plastic container sorting section, air conveying means for conveying the waste plastic container by pneumatic pressure through the conveying path, and a vortex in the conveying pipe. Vortex airflow generating means for generating, the waste plastic container sorting section comprises a material detector, and means for separating and eliminating a waste plastic container made of chlorine-containing plastic detected by the material detector. Of plastic waste containers Sorting and collecting device. 3. The waste plastic container receiving section includes a storage container into which the transport pipe is inserted, and air blowing means for jetting air to the waste plastic container in the storage container to cause convection. By injecting air into a plurality of solidified waste plastic containers and separating the waste plastic containers individually, the waste plastic container can be sent into the transport tube from the open end of the transport tube. The waste plastic container separation and collection device according to claim 1 or 2.