JP2001170937A - Regeneration-processing installation for film waste and method for regeneration-processing film waste - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a regeneration-processing installation for film waste with such advantages that installation cost and operating cost are low and the cleaning effect is high and further, it is possible to regeneration-process a large amount of the film waste as well as a method for regeneration-processing the film waste. SOLUTION: This regeneration-processing installation for film waste is equipped with a cleaner 6 for separating/removing foreign substance such as sludge from a crushed film waste. Further, the cleaner 6 comprises a cylindrical wash tank 21, a rotor 22 for gyrating a cleaning liquid and the film waste loaded in the wash tank 21, a delivery pipe 26 for delivering the cleaned film waste to the outside and an opening/closing valve 27 installed in the delivery pipe 26. In addition, a separator 9 is installed as the after-processing device of the cleaner 6 which separates the cleaned film piece into a PE film piece and a PVC film piece. This separator separates the PE film piece and the PVC film piece by the difference of specific gravity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film waste recycling facility and a film waste recycling method. More specifically, the present invention relates to an apparatus and a method for regenerating a waste of a synthetic resin film or sheet such as vinyl chloride (hereinafter, also referred to as PVC) or polyethylene (hereinafter, also referred to as PE) so that it can be reused. Synthetic resin films and sheets are very widely used today, and one of them is agricultural supplies such as agricultural greenhouses. In order to regenerate such film waste from agricultural goods to which soil and sludge are liable to adhere, the soil, sand, sludge, oil scale, and other contaminants must be removed from the film in advance. In cleaning film waste. However, the mud adhering to the above-mentioned agricultural goods such as a greenhouse is firmly adhered, and its removal is particularly troublesome.

[0002]

2. Description of the Related Art As a conventional technique for cleaning film waste, there is a technique disclosed in Japanese Patent Publication No. 61-23027. In this conventional example, an ultrasonic oscillator is installed in a cleaning tank, and film waste is immersed in a cleaning liquid in the tank, and the film waste is irradiated with ultrasonic waves to separate and remove contaminants. It is characterized by.

[0003]

However, according to the prior art, the ultrasonic vibration has a small physical amplitude, so that it is impossible to remove a heavy or firmly adhered foreign substance. It was not enough. Further, there is a problem that the throughput is small and the efficiency is low. Further, when a large number of ultrasonic vibrators and the like are arranged on the wall surface of the cleaning tank, the equipment cost becomes extremely high and the operation cost becomes high.

The present invention has been made in view of the above circumstances, and has as its object to provide a film waste reclaiming facility and a film waste reclaiming method which are low in equipment cost and operation cost, high in cleaning effect, and capable of large-scale processing. Aim.

[0005]

According to a first aspect of the present invention, there is provided a film waste reclaiming and processing apparatus, comprising a washing machine for separating and removing foreign substances such as sludge from crushed film waste. A washing tank, a rotor for swirling the washing liquid and the film waste put in the washing tank, a take-out pipe for taking out the washed film waste to the outside, and an on-off valve attached to the take-out pipe. It is characterized by becoming. According to a second aspect of the present invention, in the first aspect of the present invention, as a pre-process facility of the cleaning machine, a primary crusher for crushing a large amount of film waste into large film pieces is provided. A secondary crusher is provided, which further crushes the shaped film pieces into smaller pieces by crushing the pieces into smaller pieces. According to a third aspect of the present invention, there is provided a film waste recycling treatment facility according to the first aspect, wherein a separator for separating the washed film piece into a PE film piece and a PVC film piece is provided as a post-process facility of the washing machine. The separator comprises a water tank, a horizontal feed screw provided horizontally at the bottom of the water tank, a submersible pump provided near the tip of the horizontal feed screw, and an extraction pipe connected to the submersible pump. And a discharge chute attached to the upper end of the water tank for scraping the upper water and a discharge chute provided on the exit side of the scrape blade. According to a fourth aspect of the present invention, there is provided the film waste recycling processing equipment according to the third aspect, wherein a primary dehydrator for substantially dehydrating a film piece connected to an outlet of the take-out pipe is provided as a post-processing equipment of the separator. And a secondary dehydrator for completely dehydrating the film piece subsequently. According to a fifth aspect of the present invention, there is provided the film waste recycling apparatus according to the fourth aspect.
As a post-process facility of the next dehydrator, a packing machine for stacking a large number of film pieces, compressing and packing, and an extruder for granulating the many film pieces into pellets are provided. . The method for reclaiming film waste according to claim 6, comprising: a primary crushing step of largely crushing the film waste; and a secondary crushing step of further crushing the large film piece greatly crushed in the primary crushing step. A washing step of swirling and flowing a small film piece small crushed in the secondary crushing step together with a liquid in a washing tank to separate and remove sludge and the like; a step of dewatering the washed film piece; And a reuse processing step of processing the pieces into a reusable state. According to a seventh aspect of the present invention, in the recycling method according to the sixth aspect, the recycling step includes a step of laminating and compressing and packing the PVC film pieces, or a step of forming the PVC film pieces into a pellet form. And performing a granulation step of granulating. In the present specification, the concept of “film” includes a sheet having a large thickness.

According to the first aspect of the present invention, when the film waste swirls and flows in the cleaning tank together with the cleaning liquid, foreign matter such as sludge is caused by physical collision with the cleaning liquid, dissolution by water, and contact between the film wastes. Is removed. Since the swirling flow in the cleaning tank has a large physical movement, even a strongly stuck foreign matter can be scraped off, and the cleaning effect is high. In addition, since the processing amount is large, the work efficiency is high despite the batch processing. Further, the main components are simple in structure such as a washing tank and a rotor, so that the equipment cost is low, and the operation is mainly performed by rotating the rotor, so that the running cost is also low. According to the second aspect of the present invention, the film waste is crushed into small pieces by the crusher before the film waste is put into the washing tank, so that the washing becomes easy and the work efficiency is improved. In addition, the crushing of film waste is not performed at once, but a primary crusher that crushes large and a secondary crusher that crushes small are used separately, so that work efficiency is increased and the blade of the crusher is also large. Since the crushing type and the small crushing type can be selectively used, the life of the blade is prolonged. According to the third aspect of the present invention, the PE film and the PVC film can be separated by the separator, so that they can be separately supplied to the respective regenerating processes, and the regenerating processes can be performed efficiently. Also, since the separator is placed in a water tank and separated by the difference in specific gravity between the PE film and the PVC film, almost no manual work is required. Since the film can be taken out by the scraping blades and the discharge chute, the taking out work can be automated, and the working efficiency is high.
According to the invention of claim 4, since the PVC film taken out from the take-out pipe is dehydrated in two times, complete dehydration is possible, and the subsequent regeneration process can be performed without water. Work efficiency is increased. According to the fifth aspect of the present invention, the PVC film can be arbitrarily selected as a flat film in the form of a laminated film as it is or in a pellet form, so that it can be conveniently used in the subsequent steps. is there. According to the invention of claim 6, the film waste is continuously worked in each of the crushing, washing, separation and dewatering steps while facilitating the work of the next step, so that the work efficiency is high. According to the seventh aspect of the present invention, the final processing form can be arbitrarily selected from a layered form and a granular form, which is convenient.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory diagram of a first half process portion of a regeneration treatment facility according to an embodiment of the present invention, FIG. 2 is an explanatory diagram of a second half process portion of the regeneration treatment facility, FIG. 3 is an explanatory diagram of a muddy water treatment process portion, FIG. FIG. 5 is a configuration diagram of a washing machine, FIG. 5 is an explanatory diagram of a separator, and FIG. 6 is a flowchart of a regeneration processing method according to the present invention.

First, referring to FIGS. 1 to 3, a schematic configuration of the regeneration processing equipment of the present embodiment will be described. In FIG. 1, reference numeral 1 denotes a primary crusher, which is generally a hopper 1a and this hopper 1a.
And a rough-cutting cutter 1b provided at the bottom of the main body. When mud-soiled film waste is thrown into a hopper 1a using a greenhouse or the like, it is 200 x 400 mm
Continuous large film pieces. This large film piece is sent to a secondary crusher on a conveyor 2.

The secondary crusher 3 cuts a large-sized film piece into smaller small-sized film pieces or cuts a long strip-shaped film which cannot be completely cut by the primary crusher 1, Any crusher having such a function may be used. For example, a fixed blade is provided on the inner periphery of the side wall in the tank, a rotary blade rotating around a vertical axis is provided at the bottom of the tank, and a film piece is cut by a shearing action of the fixed blade and the rotary blade. By this secondary crusher 3, a large film piece is subdivided into smaller or shorter small film pieces. The small film pieces are sent to a hopper 5 by a conveyor 4 and further sent to a washing machine 6.

The washing machine 6 is one of the features of the present invention, and the details thereof will be described later, but roughly, a washing liquid (or water) and a small film piece are put into a washing tank, and the washing machine 6 uses a rotor. When it is stirred, it swirls and flows in the tank, and at that time, a physical collision phenomenon removes mud and foreign matter from the film piece. The washed small film pieces are sent to the dehydrator 7.

As the dehydrator 7, any type can be used as long as the film pieces can be dehydrated. For example, a centrifugal dehydrator is used. The wastewater discharged from the dehydrator 7 is reprocessed in a processing tank 16 (see FIG. 3) described later. Then, the film piece sent from the dehydrator 7 is sent to the separator 9 shown in FIG.

Although details of the separator 9 shown in FIG. 2 will be described later,
In a water tank storing water, the two are separated using the specific gravity difference between the PE film piece and the PVC film piece. The separated PE film pieces are sent to a recycle processing device (not shown), and the PVC film pieces are sent to the primary dehydrator 10.

The primary dewatering machine 10 is for substantially dewatering a PVC film piece first, and is carried out by using a known centrifugal separator. Next, the PVC film pieces are sent to the secondary dehydrator 11. The secondary dehydrator 11 is a centrifugal separator, but rotates at a high speed and can completely dehydrate. Thus, the primary dehydrator 10 and the secondary dehydrator 11
The dehydration is performed twice in order to perform the complete dehydration efficiently. The primary and secondary dehydrator 10,
The wastewater from 11 is reprocessed in a processing tank 16 (see FIG. 3) described later.

The PVC film piece exiting the secondary dewatering machine 11 is sent to a packing machine 13 or an extruder 14 by a conveyor 12. The packing machine 13 is a known device for stacking and compressing a large number of pieces of PVC film and packing the same to produce a film-shaped raw material A. The extruder 14 is a known device that melts a PVC film piece and granulates it into a pellet to produce a pellet-shaped raw material B. These recycling machines turn the PVC film pieces into raw materials that can be recycled into new products.

The above-mentioned waste water is treated by the waste water treatment equipment shown in FIG. In FIG. 3, reference numeral 16 denotes a water treatment tank,
It comprises a reaction tank 16a and a settling tank 16b. Settling tank
When the wastewater and the chemical are introduced into 16b, they are separated into fresh water and mud in the reaction tank 16a. Fresh water is sent from the upper part of the reaction tank 16a to a water tank 17 where it is stored, and mud is sent to a filter press 18 to be formed into a sand cake. The fresh water in the water tank 17 is further sent to the charging water tank 19,
From there, it is supplied to the washing machine 6 as appropriate. As described above, the wastewater is recycled in the present facility, and therefore does not pollute the external environment. The sand cake is landfilled or used for waste.

Next, the details of the washing machine 6 will be described with reference to FIG. Reference numeral 21 denotes a water tank which is cylindrical, has an open top surface, and has a bottom plate. A rotor 22 supported on a vertical rotating shaft is attached to the bottom of the water tank 21, and the rotor 22 is rotated by a motor 24 connected via a speed reducer 23. This rotor 22
Is rotated, the cleaning liquid in the water tank 21 (generally used is water, but an appropriate cleaning agent may be added thereto) and the film piece put in the water tank 21 are swirled together. . If the baffle plate 25 is attached to the inner peripheral surface of the side wall of the water tank 21, the swirling of the cleaning liquid and the film piece is hindered, turbulence occurs, interference and friction between the film pieces increase, and the disintegration action of mud and the like is performed. Will be performed effectively. An outlet pipe 26 is connected to the bottom of the washing tank 21, and the tip of the outlet pipe 26 is connected to the inlet of the dehydrator 7. An on-off valve 27 is provided in the middle of the take-out pipe 26. The on-off valve 27 is opened and closed by an air cylinder 28, and can quickly open and close a large valve plate, and can send a large amount of water and a piece of film to the dehydrator 7 at once. The cleaning machine 6
The hopper 5 disposed above the hopper 5 is of a type in which a bottom plate 5a is opened and closed by an air cylinder 5b. After storing a certain amount of film pieces, the hopper 5 is put into the washing machine 6.

Next, the separator 9 will be described with reference to FIG. This separator 9 has a water tank 31. The water tank 31 is a rectangular tank in which water is stored. A horizontal feed screw 32 is provided horizontally at the bottom of the water tank 31, and is rotated by a motor 33.
A submersible pump 3 is located near the tip of the lateral feed screw 32.
A take-out pipe 35 connected to a discharge port of the submersible pump 34 is connected to the primary dehydrator 10. A scraping blade 41 is rotatably attached to the upper end of the water tank 31 and is rotated by a motor 42. A discharge chute 43 is provided on the discharge side of the scraping blade 41.
An outlet 44 is formed at the outlet. A drain pipe 45 is connected to a suction port of a pump 46 inside the discharge chute 43, and a discharge pipe 47 is connected to a discharge port of the pump 46. The other end of the liquid feed pipe 47 is connected to a header pipe 48, and the discharge pipe 10a of the first dehydrator 10 is also connected to the header pipe 48.
The supply pipe 49 connected to the header pipe 48 is arranged so as to supply water to the water tank 31. Further, the water tank 31 is provided with a stirrer 51 so that the water in the tank and the input material can be stirred. In addition, a fresh water pipe 52 for supplying water into the tank is also provided, which is connected to the charging water tank 19 or a tap.

When a large number of film pieces cut and washed by the conveyor 8 are put into the water tank 31, the agitator 5
Mix well with 1. A large amount of film pieces include PE film pieces and PVC film pieces, but the specific gravity of PE is 0.
Since the specific gravity of PVC is 1.2 to 1.38 and the difference in specific gravity is large, it is separated in water, the PE film pieces accumulate in the upper part of the water, and the PVC film pieces sink in the water. For this reason, the piece of PVC film submerged in water is sent to the submersible pump 34 by the lateral feed screw 32, and is sent out to the primary dehydrator 10 by the submersible pump 34. One PE film piece in the upper part of the water is sent out to the discharge chute 43 by the scraping blades 41, and the PE film piece taken out therefrom is regenerated by another processing equipment (not shown). In addition, the water poured into the discharge chute together with the PE film piece is supplied by the pump 46 to the liquid supply pipe 47 and the header pipe 4.
8. The water is again supplied to the water tank 31 via the supply pipe 49.
The water fed into the primary dehydrator 10 together with the PVC film pieces is discharged from the discharge pipe 10a, the header pipe 48, and the supply pipe 49.
Is supplied to the water tank 31. As described above, the PE film piece and the PVC film piece are separated from the large amount of waste film piece by the separator 9.

Next, a method of regenerating a waste film using the above-described regenerating equipment will be described with reference to the process chart of FIG.
In the primary crushing step 101, the film waste is largely crushed by the primary crusher 1 to form a large film piece of about 200 to 400 mm. In the next secondary crushing step 102, the secondary crusher 3 cuts the film into smaller or shorter pieces to form small film pieces.
In the washing step 103, the small film pieces are washed by the washing machine 6, and mud and foreign matters are disintegrated and separated from the film pieces.
In the dewatering step 104, the washed film pieces are dewatered.
In the separation step 105, a large amount of film pieces are
Separate E film pieces and PVC film pieces so that they can be handled individually. Primary dehydration step 106 and secondary dehydration step 107
In this method, complete dehydration is performed efficiently by performing dehydration twice. Then, as a reuse processing step, a packing step 10
8 or the granulation step 109 is performed. In the packing step 108, the dehydrated PVC film pieces are laminated, compressed and packed by the compression packing machine 13 to become the film raw material A. Granulation process 10
In 9, the PVC film pieces are heated and melted by the extruder 14 and granulated into pellets, and the raw material B is pelletized. The PVC raw materials A and B thus finalized are used as recycled raw materials for producing new products.

[0020]

According to the first aspect of the present invention, when the film waste swirls and flows in the cleaning tank together with the cleaning liquid, the swirling flow at this time has a large physical movement, so that even a strongly stuck foreign matter can be scraped off. High cleaning effect. Further, since the processing amount is large, the work efficiency is high even though the batch processing is performed. Further, the main components are simple in structure such as a washing tank and a rotor, so that the equipment cost is low, and the operation is mainly performed by rotating the rotor, so that the running cost is also low. According to the second aspect of the present invention, the film waste is crushed into small pieces by the crusher before the film waste is put into the washing tank, so that the washing becomes easy and the work efficiency is improved. In addition, film crushing uses a primary crusher that crushes large and a secondary crusher that crushes small, so the work efficiency is high, and the blades of the crusher can be used for large crushing and small crushing. Since the blades can be used properly, the life of the blade is prolonged. According to the third aspect of the present invention, the PE film and the PVC film can be separated by the separator, so that they can be separately supplied to the respective regenerating processes, and the regenerating processes can be performed efficiently. Also, since the separator is placed in a water tank and separated by the difference in specific gravity between the PE film and the PVC film, almost no manual work is required. Since the film can be taken out by the scraping blades and the discharge chute, the taking out work can be automated, and the working efficiency is high. According to the invention of claim 4, since the PVC film taken out from the take-out pipe is dehydrated in two times, complete dehydration is possible, and the subsequent regeneration process can be performed without water. Work efficiency is increased. According to the fifth aspect of the present invention, the PVC film can be arbitrarily selected as a flat film in the form of a laminated film as it is or in a pellet form, so that it can be conveniently used in the subsequent steps. is there. According to the invention of claim 6, the film waste is continuously worked in each of the crushing, washing, separation and dewatering steps while facilitating the work of the next step, so that the work efficiency is high. According to the seventh aspect of the present invention, the final processing form can be arbitrarily selected from a layered form and a granular form, which is convenient.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a first half process portion of a regeneration processing facility according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a latter half process part of the reprocessing equipment.

FIG. 3 is an explanatory view of a muddy water treatment process part.

FIG. 4 is a configuration diagram of a cleaning machine.

FIG. 5 is an explanatory diagram of a separator.

FIG. 6 is a flowchart of a reproduction processing method according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Primary crusher 3 Secondary crusher 6 Washer 9 Separator 10 Primary dehydrator 11 Secondary dehydrator 13 Packing machine 14 Extruder

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4D071 AA67 DA15 4F201 AA04 AA15 AA50 BA04 BC01 BC02 BC13 BC25 BC37 BN22 BN29 BP01 BP27 4F301 AA12 AA13 AA17 BA01 BA02 BA11 BA13 BA21 BA29 BD09 BE18 BE22 BE29 BF01 BF01BF BG45

Claims (7)

[Claims] 1. A washing machine for separating and removing sludge and other foreign matter from crushed film waste, the washing machine comprises a cylindrical washing tank, and a washing liquid and a film contained in the washing tank. A film waste reclaiming facility comprising: a rotor for rotating with waste, a take-out pipe for taking out the washed film waste to the outside, and an on-off valve mounted in the take-out pipe. 2. A primary crusher for crushing film waste into large-sized film pieces as a pre-process equipment of said washing machine, and a small-size film piece by crushing large-sized film pieces further smaller. 2. The film waste recycling system according to claim 1, further comprising a secondary crusher. 3. A post-process facility for the washing machine, comprising a separator for separating the washed film piece into a PE film piece and a PVC film piece, the separator comprising a water tank and a bottom part of the water tank. A horizontal feed screw provided horizontally, a submersible pump provided near the tip of the horizontal feed screw, a take-out pipe connected to the submersible pump, and a scraping blade for scraping upper water attached to the upper end of the water tank. 2. A film waste reclaiming facility according to claim 1, comprising: a discharge chute provided on the exit side of the scraping blade. 4. As a post-processing equipment of the separator, a primary dewatering device connected to the outlet side of the take-out pipe for substantially dewatering a film piece and subsequently completely dewatering the film piece.
4. The film waste recycling system according to claim 3, further comprising a secondary dehydrator. 5. A packing machine for laminating, compressing and packing a large number of film pieces as post-processing equipment of said secondary dewatering machine,
5. The film waste recycling system according to claim 4, further comprising an extruder for granulating a large number of film pieces into pellets. 6. A primary crushing step for largely crushing film waste, a secondary crushing step for further crushing a large film piece crushed largely in said primary crushing step, and A washing step of swirling and flowing the small crushed small film pieces together with the liquid in the washing tank to separate and remove sludge and the like, and a step of dehydrating the washed film pieces,
A recycling process for sequentially processing the dehydrated film pieces into a reusable state. 7. The recycle processing step includes a step of laminating, compressing and packing PVC film pieces, or a step of stacking the PVC film pieces.
The method according to claim 6, wherein a granulating step of granulating the C film pieces into pellets is performed.