JP2001219426A - Method and apparatus for recovering spent edible oil packaging container made of thermoplastic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recover a polyethylene refined flake by removing a deposit such as a residual oxidized oil, mud, soil, sand and refuse from a spent edible oil packaging container made of a thermoplastic resin. SOLUTION: A method for recovering the spent edible oil packaging container made of the thermoplastic resin comprise a step of comminuting the container made of the resin together with a comminuted cellulose material, and a step of giving an impact grinding force to the comminuted individual small pieces to be treated to a resin material and a deposit such as the cellulose comminuted material adsorbing the residual oil such as wood chips or the like and granulating the resin material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recovering used thermoplastic resin edible oil packaging containers, and more particularly to used dirt and residual oil, mud,
The present invention relates to a method of recovering a thermoplastic resin such as polyethylene as flakes from an edible oil packaging container made of thermoplastic resin such as polyethylene to which soil, dust and the like are attached.

The target edible oil packaging container made of thermoplastic resin is a thermoplastic resin oil wrapped container, which is used for packaging edible oil and industrial oil, etc., in a large amount. Although used and discarded, the Containers and Packaging Recycling Law of April 2000 covers plastic containers and packaging and paper containers and packaging.

[0003] This plastic container and packaging (excluding PET bottles for beverages or soy sauce) is expected to be 3 million tons per year, and is expected to be recovered in large quantities. A large amount of used polyethylene cooking oil packaging containers and polyethylene (PE) bottles (hereinafter also referred to as “PE bottles”) will be included.

[0004] The resin packaging container is made of, for example, polyester (polyethylene terephthalate; PET).
Bottle (hereinafter, referred to as “PET bottle”) or a bottle made of vinyl chloride (PVC) (hereinafter, referred to as “PVC bottle”).

[0005] When recycling containers and packages that have been sorted and collected under the Packaging Containers Recycling Law, recycling that is used as a raw material is prioritized as much as possible, which is difficult from a technical viewpoint and an environmental load viewpoint. In that case, it will be used as energy (heat).

[0006]

2. Description of the Related Art Vinyl chloride (PVC) and polyester (PE) forming a packaging container made of thermoplastic resin formed by blow molding or the like, which is a packaging container made of this kind of waste resin.
T), thermoplastic resins such as polyethylene (PE) are discarded as disposable due to consumption of the contents, and mud, soil, sand,
Deposits such as dust are adhered, and these collected resin packaging containers are washed with water, dried, finely pulverized, and cut with fibers or blow molding (blow molding). It was molded and reused as a substitute for piles.

[0007] The above-mentioned resin-made packaging containers each have features such as excellent water resistance and weather resistance and are hardly perishable. On the other hand, in particular, in particular, in PVC, incineration by an incinerator for disposal is required. At that time, it is well known that a large amount of harmful gas or smoke is generated, which is not preferable in the social environment. In addition, there is a disadvantage that the resin material melted during incineration may adhere to the inside of the furnace and damage the furnace itself. Therefore, even if the waste resin packaging container is buried in the ground to avoid this disadvantage, it remains without decay for a long period of time, which is considered to be a cause of environmental destruction.

On the other hand, with respect to this kind of resin material, there is a tendency for resources to be depleted year by year, and it is required to reuse a used resin material without discarding it.

In the conventional re-commercialization technology, a washing step and a drying step for removing water remaining after washing are essential for removing the deposits attached to the thermoplastic oil packaging container.

[0010] Further, there is an oil method for a recycling method using thermal energy. That is, the recovered plastic is thermally decomposed to obtain a liquid hydrocarbon oil, and the hydrocarbon oil obtained in this step is used as a raw material or fuel for the chemical industry or the like.

Further, there has been proposed a technique of gasifying plastic containers and packages by removing foreign matter, crushing, dechlorinating, fractionating, etc. to obtain gases such as carbon monoxide and hydrogen.

Gases such as carbon monoxide and hydrogen are used as raw materials or fuels in the chemical industry.

[0013]

In the water washing process, a large amount of washing liquid is required to remove the deposits attached to the thermoplastic oil packaging container, and the water remaining after washing is removed. Since the drying step is indispensable, enormous equipment is required for the washing step and the drying step, and there is a problem that water resources and energy resources are wasted.

In particular, in the case of waste resin packaging containers for packaging products of oils such as tempura oil, sesame oil, salad oil, etc., in the case where the deposits of the oils are made of resin compared to other types of deposits. It is difficult to separate from the surface of the packaging container, and the above water washing process cannot remove oils attached to the surface of the packaging container, so a cleaning liquid for separating oil must be used. However, a cleaning solution containing a harmful substance such as a surfactant contaminates a river or the like and cannot be drained without a purification treatment, so that there is a problem that the purification treatment equipment and operation costs are expensive.

As for the method of recycling by thermal energy, hydrogen chloride gas is generated during thermal decomposition from plastic, so that not only the problem of metal corrosion of the treatment equipment but also the decomposition products such as oil and gas are used as fuel. The problem of corrosion of the combustor and generation of harmful gas at the time of use arises.

In the gasification technology, most of the unreacted carbon which cannot be converted into gas is discharged together with fine slag. If the unreacted carbon content accompanying the fine slag is not used, there is a problem that the carbon conversion rate of the entire system is reduced and the efficiency is poor.

[0017] The present invention solves the above-mentioned problem of the recycling method, and removes residual substances such as oxidized oil, mud, soil, sand, dust, etc. from a used thermoplastic resin edible oil packaging container, and removes the polyethylene. An object of the present invention is to provide a method and an apparatus for collecting refined flakes.

[0018]

[Means for Solving the Problems]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 basically shows a packaging container made of a target waste resin, which includes a cap, a screw portion, a body portion, and the like.
The resin material forming the hakama portion and the like is, for example, polyethylene, and a bottle with or without a label having a printing surface such as a trademark is to be processed. For the waste bottle, remove the cap from the container body and discard the remaining contents.If the cap is made of metal, collect it separately.Caps made of the same type of resin material, screws, body, body, hakama, etc. The used container is subjected to the (crushing step) to remove adhering substances such as residual oil to some extent, and to be used as a small piece to be subjected to a subsequent step, or, if necessary, a wood powder that has been subjected to a (wood flour drying step). Spent edible oil packaging container made of thermoplastic resin or crushed it in a broad sense, here crushed in a broader sense together with the small pieces to be treated obtained by crushing (crushing step). The residue is further absorbed to powder and removed to some extent, and the small particles to be treated are dried, preferably by stirring in a hot air atmosphere [drying step], and the residual oil is further melted and welded to the wood flour. [Separation / classification Separating and recovering a resin material and wood flour and deposits in granule sizing step], with classification and sizing collected into flakes. Further, if necessary, a label or the like is separated from the sized product by subjecting it to a [wind sorting process]. It is preferable that the colored materials are separated and processed simultaneously for each color. The wood flour is subjected to a pulverizing process a plurality of times and then separately regenerated into a solid fuel.

1. Crushing process For example, a edible oil packaging container made of used polyethylene, which is a target, has a cap made of the same material as the main body, a label made of paper or a plastic film, and has mud,
Deposits such as soil, sand, dust and the like are attached, and oxidized residual oil is attached to the inner surface.

When the color of the cap is different from that of the main body, for example, when a large amount of batch processing is performed, it is preferable to separate the cap separately and perform another processing.

Using a single-shaft crusher, the crushed material is greatly crushed to improve the crushing efficiency in the next step, and the residual oil in the container is scattered and reduced.

Since the twin-screw crusher does not scatter oil at low speed,
Using a uniaxial crusher, screen mesh φ20 ~ φ30mm
Crushing is preferably performed so as to pass through φ30 mm.

If the diameter is more than φ30 mm, the oil in the container is less likely to be scattered, and if the diameter is less than φ20 mm, the capacity is reduced due to the shape of the container consisting of the neck, shoulder and trunk.

Wire mesh (opening)
5 mm to 10 mm), and remove the residual oil from the crushed material with crushing.

By a known crushing means, which is a single-screw crusher (hereinafter referred to as a "cutter mill" for convenience in the present specification), for example, crushed into small pieces having a size of about 20 to 30 mm on a side, and these are crushed into small pieces 82 to be treated. I have.

FIG. 2 shows a cutter mill as an example of the crushing means. Reference numeral 121 denotes a cutter mill body, and an input port 123 is provided on the upper surface.
In the cutter mill main body 121, a cutter support 124 is provided in the cutter mill main body 121, which is supported by the cutter mill main body 121 and is rotated in a vertical direction by rotation driving means (not shown). Four rotating blades 125 that are long in the horizontal direction are provided so as to form an equal angle of 90 degrees in the rotating direction of the cutter support 124, and the cutting edges of these four rotating blades 125 are located on the same rotation locus.

Further, the two fixed blades 126 are spaced apart from the rotation locus of the cutting edge of the four rotary blades 125 by a small gap.
Is fixed to the cutter mill main body 121 at a position substantially symmetrical with the rotation locus of the cutting edge of the rotary blade 125, the inside of the cutter mill main body 121 is divided by the two fixed blades 126, the cutter support 124 and the rotary blade 125, and the input chamber 127 and the crushing chamber are crushed. A chamber 128 is formed. The charging port 123 communicates with the charging chamber 127. In addition,
The clearance between the second fixed blade 126 and the rotary blade 125 can be freely adjusted so that the object to be crushed can be cut into a desired size or, in a broad sense, crushed.

The crushing chamber 128 is provided with the second fixed blade 12.
The six screens are separated by a mesh screen 129 so as to surround the rotation locus of the rotary blade 125. In this embodiment, the screen 129 uses a punching metal in which holes with a diameter of 20 to 30 mm are formed innumerably. Further, an outlet 111 is provided below the crushing chamber 128 for discharging crushed pieces that have passed through the screen 129 and adhering substances such as residual oil separated from the surface of the small pieces 81 during crushing.

In the above-mentioned cutter mill 120, small pieces 81 formed by crushing, crushing or coarsely crushing in a broad sense by the cutter mill 120 are introduced from the inlet 123, and the cutter 81 is rotated by a rotary driving means (not shown) (power 5.5 KW). Support 12
800 min 4 as an example ^- when rotating at ^1, the small piece 81 formed by the crushing rotary blade 1 of the cutter support 124
Although the shape and the area between the fixed blade 25 and the fixed blade 126 are undefined,
It is crushed into squares such as rectangles or squares, or irregularly shaped pieces such as triangles, trapezoids, and diamonds. Diameter 20-3
By using a punching metal of 0 mm as the screen 129 and appropriately adjusting the processing time, the input small piece 81 becomes a small piece 82 to be processed having a long side or a long diameter of about 3 to 35 mm. The small piece to be processed 82 does not pass through the screen 129 and remains in the crushing chamber 128.

On the other hand, a part of the adhered matter such as residual oil separated from the surface of the small piece 81 during the crushing, the screen 12
The small pieces crushed into a size that can pass through the opening 9 pass through the screen 129 and are discharged from the discharge port 111.

Thus, without passing through the screen,
The small pieces remaining in the crushing chamber 128 become the small pieces to be processed 82.

In the embodiment shown in FIG. 2, the cutter mill 120 is shown as having a horizontal rotation axis, but the cutter mill 120 used in the present invention uses a vertical rotation axis. You may.

The crushed material from which oil has been removed to some extent in this step is subjected to a pulverization step in the next step together with a cellulosic crushed material such as wood flour, but when the wood flour has a water content of a certain level or more, the crushed Since the efficiency of adhering the residual oil to the wood flour in the process is reduced, it is preferable to go through the wood flour drying process. Next, the wood flour drying step will be described for convenience.

Wood Powder Drying Step As a device, a high temperature bath or the like, for example, a SANYO constant temperature dryer MOV-202F can be used in addition to JP-A-10-244535. Drying conditions 180 to 110 ° C Time 15 to 60 minutes Reduce the water content to 5 wt% or less. The lower the water content, the easier the oil is adsorbed.

If the particle size is large, the residual oil is difficult to be adsorbed, so that the particle size of the wood flour is adjusted to 3 mm or less (from a sawdust to a small particle size, before drying).

2. Pulverizing Step The small particles from which the oil has been removed to some extent are subjected to a pulverizing step together with wood flour. There is cellulose such as wood flour in the process of crushing together with wood flour to improve the adhesion to the oil wood flour, and to reduce the size or particle size of the small pieces to be treated to a long side or a long diameter of about 2 to 25 mm. This improves the adhesion of oil to wood flour. Also in this pulverization, a single-shaft pulverizer is used because the residual oil is pulverized while being entangled and adhered to the cellulose evenly. Screen mesh φ8 to 15 mm Compounding weight ratio Cellulose crushed product: Polyethylene crushed product = 60 to 5: 100 Preferably 50 to 10: 100, more preferably 40 to 20: 100.

In the above step, the residual oil is centrifuged or further adsorbed on wood flour and sent to the next step together with the crushed container.

3. Drying process Wood flour and polyethylene crushed material with residual oil adsorbed
Furthermore, it is sent to a drying process. Since the residual oil is oxidized and sticks in the used container, the residual oil is heated to make it more easily adhere to cellulose, and further stirred to promote the adhesion of the residual oil to wood powder.

Drying is performed at a hot air temperature of 120 to 70 ° C. using a machine similar to the above-mentioned wood flour drying apparatus. At 70 ° C. or lower, the oxidized residual oil is less likely to be adsorbed on the cellulose, and at 120 ° C. or higher, the small pieces to be treated melt.

If it is less than 40 rpm, the residual oil is less likely to be adsorbed on the cellulose, and if it is more than 200 rpm, the polyethylene is pulverized and becomes too fine. Therefore, stirring is carried out at 40 to 200 rpm for 1 to 10 minutes.

Within 1 minute, cellulose and polyethylene are not uniform and do not adhere.

4. Separation, classification and sizing process Equipment Cleaning separator Rotation speed 3000-4000 rpm Separation time 1-4 minutes Screen mesh φ1.5mm In this process, the above-mentioned polyethylene
Separate cellulosic crushed material with soil, sand, garbage, paper labels, and residual oil. The separated cellulose to which residual oil adheres is recycled as fuel pellets by press molding.

Further, the cellulosic crushed material after the separation can be supplied again to the pulverizing step together with another cellulosic crushed material. The number of diversions was up to six. Thereafter, it can be solidified as a solid fuel.

Apparatus Briquette Ring Press Co., Ltd. Shintokoki Seisakusho Co., Ltd. Model SKB-7 Compressive force 1.3 ton / cm ² Product diameter φ50mm In the crushing process, formed by crushing into an irregular shape of about 2 to 25 mm on one side An impact-milling force is applied to the treated small piece 82 to remove or remove the remaining oil, the wood powder to which the residual oil is adsorbed, and other attached matter still attached to the surface of the small piece 82 to be treated. At the same time, the particles 82 to be treated are sized by, for example, shaving the treated small pieces 82 by application of the grinding impact force, such as a portion of the surface of the packaging container 1 which is deteriorated by repeated use. The polyethylene sized product obtained as a raw material is recovered.

FIGS. 3 to 5 show examples of the structure of the separation / classification / granulation means used in the present invention (referred to as “cleaning separator” in this embodiment for convenience).

First, the general outline of the cleaning separator 130 will be described.
30 is provided with a supply inlet 132 into which each of the small pieces 82 to be treated is introduced, and by processing the small pieces 82 in the cleaning separator 130, the residual oil and the residual oil still adhering to the small pieces 82 are adsorbed. Adhesive substances such as wood powder and paper labels attached to the container body are peeled off,
These removed polyethylene sized products are taken out,
An outlet 153 leading to the recovery tank 240, the adhered material peeled off from the small piece 82 to be treated and the dust generated by scraping the small piece 82 itself by the application of the impact milling force, the wood powder to which the residual oil is adsorbed, and a container A collection tank 250 is provided for collecting the paper label and the like attached to the main body through an outlet 152 for discharging the paper label and the like.

[0047] Wood powder treated in the pulverization or pulverization and drying step is attached to the supply inlet 132 or
The wood powder to which the residual oil is adsorbed and the small pieces to be treated 82 (hereinafter, these are collectively referred to as “the small pieces to be treated”) are supplied. The outlet 153 communicates with the supply inlet 132 via a communication pipe 235, and a pipe 236 from a compressed air supply source (not shown) communicates with the outlet of the communication pipe 235. A flow straightening plate is provided at a communicating portion of the pipe 236 so that compressed air mainly flows to the supply inlet 132. A branch pipe 237 is provided to branch off the communication pipe 235 to reach the polyethylene sized product collection tank 240.
At the branch point 7, a three-way solenoid valve 238 is provided which can be switched at predetermined time intervals by a timer circuit, for example.

On the other hand, the discharge port 152 communicates with the collection tank 250 through a discharge pipe 239, and the crushed and finely adhered substances discharged from the discharge port 152 and the small pieces to be processed 82 themselves are shaved. The dust 84 made of powder of the polyethylene sized product and the like generated by suction is sucked into a discharge pipe 239 provided with a blower 157 and collected in a collection tank 250.

The internal structure of the cleaning separator 130 will be described with reference to FIGS. 3 to 5. The cleaning separator 130 used in this embodiment is a small one for an experimental device.
Has a processing capacity of 7 kg / h.

The above-mentioned supply inlet 132 of the cleaning separator 130 has a fixed disk 131 having a diameter of 400 mm.
The fixed end plate 133 is opposed to the fixed disk 131 with a processing space 155 therebetween, and the outer peripheral edge of each fixed end plate 133 is fixed to the fixed disk 131 by a peripheral side plate 135.

In the processing space 155, a rotating horizontal shaft 142 is provided.
A fixed end plate 133 and a movable disk 141 having substantially the same diameter are provided.
3,143. The rotating horizontal axis 14
2 is rotationally driven by a rotational driving means such as a motor 161 or the like.
Rotate at ^-1 .

On the fixed disk 131, identification pins 134 are sequentially planted on a plurality of concentric rotation trajectories a1 to a6 (relative to the movable disk 141) (FIG. 5). On the other hand, on the movable disk 141, movable pins 144 that are alternately inserted between rotation trajectories of the fixed pins 134 on a plurality of rotation trajectories b1 to b6 different from the fixed pins 134 are sequentially planted. The effect that the adhered matter such as residual oil adhering to the surface of the small piece 82 to be treated is separated or separated by the impact grinding force between the fixed and movable pins 134 and 144, and that the small piece 82 to be treated is spherical. It is arranged so that the effect of sizing can be obtained.

More specifically, the number of the fixed pins 134 is 16 on the rotation locus a1 near the center of the fixed disk 131.
The rotation locus a located on the outer peripheral side of the rotation locus a1
On 2 above, 24 are planted.

On the other hand, the number of movable pins 144 is
41 on the rotation trajectory b1 near the center of 41, and 4 on the rotation trajectory b2 located on the outer peripheral side of the rotation trajectory b1.
This is planted.

In practice, the fixed and movable pins 134, 1
The grinding force applied to the small piece to be processed 82 is reduced by increasing the clearance between the pieces 44, and the grinding force is increased by decreasing the clearance.

Further, in FIG. 3, a discharge space 15 is provided on the outer peripheral side of the movable disk 141 and on the inner peripheral side of the peripheral side plate 135.
A screen 151 of a predetermined mesh in which pores are formed by punching is provided around the screen 6, and a discharge port 152 is provided below the discharge space 156. In the present embodiment, the screen 151 is, for example, a mesh having a hole having a diameter of 1.5 mm.

The screen 151 of the processing space 155
An outlet 153 is provided in the lower part of the
Reference numeral 3 is used to collect the sized polyethylene sized product which is communicated with the supply inlet 132 through the communication pipe 235 as described above and is collected via the branch pipe 237 which branches off the supply inlet side of the communication pipe 235. To the collection tank 240. As another example, a plug valve for opening / closing control is provided in the outlet 153, and the outlet 153 is connected to the outlet 153 in FIG.
As shown in (1), it is also possible to communicate with the supply inlet 132 via a blower 158 that sucks air in the cleaning separator 130.

Accordingly, the cleaning separator 1 described above is used.
In 30, the rotating disk 142 is rotated by the rotation driving means of the motor 161 to rotate the movable disk 141, and each of the small pieces 82 is supplied to the supply slot 132. At the center, each of the small pieces 82 to be processed is hit by the impact of the fixed and movable pins 134 and 144 between the fixed and movable pins 134 and 144 by the impact attrition force. The surface of the small piece 82 to be treated or the surface of the small piece 82 to be treated is rubbed with each other, so that the surface of the small piece 82 to be treated is crushed, so that the adhered substances or the deteriorated polyethylene sized material adhered to the surface are finely divided. It is pulverized into a dust and peeled off from the surface of the small piece 82 to be processed. Due to the addition of the impact milling force, the small piece 82 to be treated itself is partially shaved to become a powder and peeled off together with the adhered substance, and is sized in a substantially spherical form to form a sized polyethylene. Things. In this way, the adhering matter peeled off from the processing target piece 82 and the dust 84 generated by scraping the processing target piece 82 pass through the screen 151 by the centrifugal action of each movable pin 144,
After being classified in the discharge space 156, the air is sucked and discharged from the discharge port 152 to the outside through the blower 157 (FIG. 6).

In this embodiment, the blower 157 is 15 kw, the pressure is 460 mmAq, the suction speed is 65 m ³ / min in the case of a large machine, and the blower 157 is 3.7 kw, the pressure of 4 in the medium machine.
At 60 mmAq, at a suction speed of 51 m ³ / min., For small machines, 1.5 kw, at a pressure of 400 mmAq, at a suction speed of 3.4 m ³ / min. The dust-like polyethylene sized product that has just been generated is sucked together with the air in the cleaning separator 130.

On the other hand, the small pieces 82 to be processed which do not pass through the screen 151 accumulate in the screen 151. The small pieces to be treated 82 from which the extraneous matter adheres are still mixed in the small pieces to be treated 82 from which the extraneous matter has been removed. However, since the outlet 153 and the supply inlet 132 communicate with each other through the communication pipe 235, the processing target piece 82 taken out from the outlet 153 is returned to the supply inlet 132, and is again returned to the inside of the cleaning separator 130. It is repeatedly milled under the impact milling force, and the deposits such as residual oil adhering to the surface of the small piece 82 to be treated are peeled off from the small piece 82 to be treated, leaving only the polyethylene sized material constituting the small piece 82 to be treated. .

Although the small particles to be treated 82 from which the deposits have been removed in this way are refluxed, they are not finely ground so as to pass through the screen 151, but are mostly milled.
It remains in 51. The above-mentioned separation / classification / size control step can be repeated a plurality of times as necessary until the adhered substance of the small pieces 82 to be treated in one batch is separated.

The above-mentioned cleaning separator 130 is driven by the rotary driving means 161 to open the downstream side of the communication pipe 235 with a three-way solenoid valve 238 and to open the branch pipe 237.
By closing the side and supplying compressed air from the pipe 236 to the communication pipe 235, the supply inlet 132, the processing space 155, and the outlet 15
3, and an airflow circulating to the communication pipe 235 is generated. When each of the small pieces 82 of one batch is supplied to the supply inlet 132 through the supply pipe 231, the small pieces 82 are sized in a substantially spherical shape by the grinding impact force applied to the small pieces 82, and The dust 84 is formed by finely pulverizing the adhering matter that has been processed in the cleaning separator 130 and peeled off from the surface of the small piece 82 to be processed, and the dust 84 composed of a polyethylene sized product generated by partially shaving the small piece 82 itself. After passing through the screen 151, it is discharged to the collection tank 250 by the blower 157, while the small pieces to be processed 82 remaining in the screen 151 are sucked into the communication pipe 235 by the circulating airflow and fed again to the processing space 155 to be cleaned again. 130, and a series of steps are performed as necessary until the adhered material on the surface of the small piece 82 to be treated in one batch is peeled off. Repeated over.

Then, after the above processing is completed, the downstream side of the communication pipe 235 is closed with a three-way solenoid valve 238 and the branch pipe side is opened, so that the small pieces 82 to be processed left in the screen 151 are removed. From the communication pipe 235 to the branch pipe 23
The sieved polyethylene sized product formed by sieving into a substantially spherical shape through 7 is collected in the collection tank 240.

Note that, instead of the three-way solenoid valve 238, a solenoid valve for opening and closing the branch pipe 237 and the communication pipe 2
It is also possible to provide an electromagnetic valve that opens and closes the downstream side of 35, and to open and close these two electromagnetic valves alternately.

5. Wind separation process For a small piece to be treated and pulverized together with wood flour while a plastic film having a printing surface is wound around a thermoplastic resin packaging container to be treated, the impact grinding force is applied to the small piece to be treated. To separate the resin material and deposits,
The resin material is sized to obtain a recovered resin material that has been made into a material, and then the film is separated and removed by suction of wind. Suction wind speed 2-4m / s Equipment Suction type wind sorting MHV-105 Harashima Electric Co., Ltd.

[0066]

[Example 1] Residual oil removal step A used polyethylene oil bottle (122 g) was charged into a crusher. The apparatus used was a Horai type uniaxial crusher Z1420, and the screen mesh size was φ30 mm. The cap used was the same color (translucent) as the main body.

Wood flour drying 48.8 g of sawdust was placed in a thermostat at 180 ° C. for 15 minutes to adjust the water content of 35% to 3.6% by weight. At this time, stirring was performed at intervals of 5 minutes.

Grinding Step with Wood Flour 122 g of the crushed oil bottle and 48.8 g of sawdust whose water content was adjusted to 3.6% by drying the wood flour were put together in a single-shaft crusher. The screen of the crusher is a horizontal crusher Z14 manufactured by Horai Co., Ltd.
20 was used. Here, 170.8g of crushed wood flour
Obtained.

Stirring Hot Air Step 170.8 g of the small pieces to be treated obtained in the crushing step together with the wood flour were put into a stirring hot air blower. The charging method was carried from a bucket conveyor provided in the stirring hot air blower to a belt conveyor, and was thrown into the stirring hot air blower. The test was performed under the conditions of a hot air temperature of 90 ° C., a treatment time of 3 minutes, and a stirring rotation speed of 40 rpm.

Dry Washing Step 170.8 g obtained in the stirring hot air step was charged into a mini cleaning separator.

The rotation was performed at 3000 rpm, the screen mesh was 2.0 mm, and the separation time was 1 minute.

Polyethylene flakes separated from cellulose adhering to mud, soil, sand, dust and residual oil were recovered. The recovered amount was 93.6 g, and the yield was 76.6%. mud,
77.2 g of cellulose with soil, trash and residual oil attached

Wind Separation Step 93.6 g of the recovered polyethylene flakes obtained above were charged into a suction-type wind separator.

The suction wind speed is set at 4.0 m / s. 1.4 g of the plastic label mixed in the collected polyethylene flakes was removed by the suction air, and the purified polyethylene flake was 92.
2 g could be recovered. For the separated wood flour, 77.2 g of cellulose adhering to the mud, soil, dust, and residual oil separated in the dry washing process was reused together with the wood flour as sawdust in the grinding process. Reuse was performed six times.

Evaluation of separation

[Table 1] * Yield is the recovery rate as an object. Example 1 ... Example 1 Example 2 ... Example 1 was not subjected to the stirring hot air process. Other conditions were the same. Example 3 Newspaper was used as a cellulosic crushed product instead of wood flour in Example 1. Other conditions were the same. Example 4 The separation time was made longer than in Example 3. Other conditions were the same. Example 5: No wood flour was added to Example 1.

Result analysis Analysis method 10 g of a sample is placed on a thimble and heated to reflux with hexane.
Thereafter, the hexane was heated and concentrated, and the residual oil was measured. Example 21 ppm Example 43 ppm Example 35 ppm Example 30 ppm Example 50 ppm

[0077]

According to the above-mentioned invention, it is possible to re-commercialize as a resin raw material without enormous consumption of water resources and energy and without requiring large-scale equipment. Further, since the recycled resin raw material is sized, there is an advantage in cost reduction that repelleting is not required. Further, since the heat history of the object is small, it is possible to prevent deterioration and is optimal as a recycled resin material.

In the present invention, "recycling as raw material is prioritized" as described in the Packaging Container Recycling Law, not thermal recycling such as thermal energy.
The principle of material recycling is that there is no adverse effect on the human body due to the generation of toxic gas or corrosion of equipment. There is no social problem due to environmental pollution.

The present invention is an excellent recycling method economically and environmentally, and also as a product of a recycled resin raw material.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of the process of the present invention.

FIG. 2 is a sectional view of a main part showing an example of a fine crushing means (cutter mill) used in the embodiment of the present invention.

FIG. 3 is an overall perspective view showing a main part of a separation / classification / grain sizing means (cleaning separator) used in the embodiment of the present invention.

FIG. 4 is a plan view of FIG. 3;

FIG. 5 is a sectional view of an essential part taken along line VV in FIG. 3;

FIG. 6 is an overall perspective view of a separation / classification / granulation means (cleaning separator) used in the embodiment of the present invention and devices connected to the cleaning separator.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 Used thermoplastic resin edible oil packaging container 81 Small pieces 82 Small pieces to be treated 83 Sizing and collecting resin material 102 Dryer 111 Discharge port 120 Cutter mill 121 Cutter mill body 123 Input port 124 Cutter support 125 Rotary blade 126 Fixed blade 127 Input Chamber 128 Crushing chamber 129 Screen 130 Cleaning separator (separation / classification / granulation means) 131 Fixed disk 132 Supply inlet 133 Fixed end plate 134 Fixed pin 135 Peripheral side plate 141 Movable disk 142 Rotating horizontal shaft 143 Bearing 144 Movable pin 151 Screen 152 Outlet 153 Outlet 155 Processing space 156 Discharge space 157 Blower 158 Blower 161 Motor 231 Supply pipe 235 Communication pipe 236 Pipe 237 Branch pipe 238 Three-way solenoid valve 239 Discharge pipe 240 Collection tank 25 Collecting tank

Claims (9)

[Claims] 1. A method for separating adhered matter from a used thermoplastic resin edible oil packaging container and recovering a resin material, wherein the thermoplastic resin packaging container is pulverized together with a cellulosic crushed material. A step of applying a shock-milling force to each of the pulverized individual pieces to be treated to separate the resin material and the attached matter, and sizing the resin material. A method for collecting edible oil packaging containers. 2. A method for separating adhering matter from a used thermoplastic resin edible oil packaging container and recovering a resin material, wherein the thermoplastic resin packaging container is crushed into a plurality of small pieces to be treated. And a step of coarsely crushing the small pieces together with the cellulosic crushed material, and applying an impact milling force to each of the coarsely crushed small pieces to separate the resin material and the attached matter. And a method for collecting a used thermoplastic resin edible oil packaging container comprising at least a step of sizing the resin material. 3. The collection of the used thermoplastic resin edible oil packaging container according to claim 1 or 2, further comprising a step of classifying the sized resin material to obtain a materialized recovered resin material. Method. 4. A small piece to be treated which has been pulverized together with wood flour while a plastic film having a printing surface is wound around a thermoplastic resin packaging container to be treated, and which is subjected to impact friction with the small piece to be treated. 2. The method according to claim 1, wherein a crushing force is applied to separate the resin material and the attached matter, the resin material is sized to obtain a recovered resin material, and the film is separated and removed by suction of wind. Any one of ~ 3
The method for collecting a used thermoplastic resin edible oil packaging container according to the above item. 5. The use according to any one of claims 1 to 4, further comprising a step of coarsely crushing the crushed cellulosic material together with the small pieces to be treated beforehand, preferably through a drying step, preferably to a water content of 5 wt% or less. For collecting used thermoplastic resin edible oil packaging containers. 6. After the coarsely crushed cellulosic crushed material has passed through a drying step, an impact-milling force is applied to each of the small pieces to be treated to separate the resin material from the attached material, and the resin material is separated. The method for collecting a used thermoplastic resin edible oil packaging container according to any one of claims 1 to 5, which comprises at least a step of sizing. 7. An apparatus for separating adhering matter from a used thermoplastic resin edible oil packaging container and recovering a resin material, wherein the pulverization is performed by pulverizing the thermoplastic resin packaging container together with a cellulosic crushed material. Means, fixed-side washing / drying / separation / classification / granulation means on a fixed disk, in which each fixed pin is sequentially implanted on a plurality of rotation trajectories, and can be rotationally driven to face the fixed disk On the movable disk provided in the, movable side cleaning / drying and separation / classification / sizing means sequentially implanted each movable pin on a plurality of rotation trajectories different from each of the fixed pins, and each of the fixed pins At the outer periphery in combination with each movable pin, a classifying means communicating with a discharge port for discharging separated deposits, and a takeout means for taking out a recovered resin material having a desired particle size or more to a takeout port, Fixed pin and each movable And separating and classifying the resin material and the deposits by an impact milling force, and separating and classifying the resin material. Collection device for used thermoplastic resin edible oil packaging containers. 8. A crushing means for crushing the thermoplastic resin packaging container into a plurality of pieces to be treated, and a crushing means for crushing the pieces to be treated together with a cellulosic crushed material. An apparatus for collecting used thermoplastic resin edible oil packaging containers according to the above. 9. A drying means for preliminarily drying a cellulosic crushed material mixed with the small pieces to be treated,
The container for edible oil packaging made of used thermoplastic resin according to any one of claims 7 to 8, further comprising drying means for drying the small pieces to be treated and the cellulosic crushed material supplied to the sizing means. Collection device.