JP2000015636A - Multistage washing/dewatering/drying method for cut pet bottle fine piece and its multistage washing/ dewatering apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To wash/remove the dirt of a PET bottle, label pieces, paste, sugar, and others adherent to the bottle by subjecting PET bottle fine pieces cut by a crusher to multistage washing and dewatering/drying treatment in order to recycle a waste PET bottle. SOLUTION: Cut PET bottle fine pieces X, after being stored in a cyclone 1, are supplied to a high speed rotary washing machine S to be washed frictionally, dropped into the first washing tank 17, agitated, washed, dewatered, and conveyed by a conveyor in which agitating blades 20 are formed in the rear half part and rotary blades 21 are formed in the front half part, dropped into the second washing tank 24. The fine pieces precipitated in hot water are conveyed while being washed by a guide trough 25 and a screw conveyor 27. The fine pieces pushed out from the second washing tank 24 are dropped into a dewatering drum 30, after being rotated/dewatered by dewatering rotary blades formed in the drum 30, discharged by discharging rotary blades, and dried by being conveyed by hot air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for multi-stage washing, dehydration and drying of cut PET bottle pieces and a multi-stage washing and dehydrating apparatus therefor. After washing the strips in multiple stages and subjecting them to a dehydration drying process, they are used to wash and remove stains on the PET bottles, label pieces, glue, sugar and the like adhering thereto.

[0002]

2. Description of the Related Art Recently, collection and reuse of waste PET bottle containers have been actively carried out in various places, and caps have been removed.
After cleaning the inside of the bottle and removing the label, it is gathered at the collection point in each place, crushed and blocked, stored in bags, and transported to a facility with large reprocessing equipment, Therefore, after performing the sorting process, various processes are performed until a reusable state is reached, and finally the resource is reused.

[0003]

Therefore, the cost of transporting waste PET bottles, transporting them to reprocessing facilities, sorting, removing labels, and improving the quality of reusable resources. Is bulky, which makes it difficult to put it on a profitable basis.

Therefore, the present inventor has set up a collection facility in various parts of the country for collecting waste PET bottles collected from each household.
By providing the pulverizer of the PET bottle and the multi-stage washing / dehydrating / drying apparatus for the cut PET bottle pieces of the present invention, which is relatively small and compact, the pet bottle can be easily processed in individual collecting facilities, and the pet Focus on achieving low-cost recycling by transporting bottles to large-scale reprocessing facilities by attempting to improve the quality of bottles as resources that can be reused as much as possible and transporting them to large-scale reprocessing facilities. It was done.

[0005]

Therefore, according to the present invention, in order to solve the above-mentioned problems, as described in claim 1, a cut pet having the following processing steps (1) to (4) is provided. Provided is a method for multistage washing, dehydration and drying of bottle pieces. (1) A step of storing the cut PET bottle pieces in a cyclone, sending the cut pieces from the cyclone to a high-speed rotary washer, and rubbing the mixture by stirring and pouring water in the high-speed rotary washer. (2) A step of dropping the rubbed and washed PET bottle pieces into the first washing tank, forming stirring blades in the second half, stirring and cleaning with a conveyor having rotating blades in the first half, and draining and conveying. (3) Drop the drained PET bottle strips from the tip of the conveyor into the second washing tank, and wash the PET bottle strips immersed in the high-temperature water with the guide trough and the screw conveyor that support the diagonally upward slope. While transporting,
A step of extruding and conveying from the water in the second washing tank at a position near the tip of the screw conveyor. (4) The extruded PET bottle pieces are dropped into the dewatering drum from the tip of the screw conveyer, and are dewatered by the rotating blades for draining provided inside the dewatering drum, and then transported by the rotating blades for discharging. A step of drying the pipe by unloading the pipe and transporting it with warm air.

According to a second aspect of the present invention, a cyclone for storing cut PET bottle pieces is provided, and a high-speed rotary washing machine for PET bottle pieces is provided at a lower end of the cyclone, and the inside of the high-speed washing machine is washed. A water injection nozzle is provided, and a first washing tank is provided immediately below the high-speed rotary washing machine with a gently sloping slope at the bottom of the tank, and a stirring blade is formed in the second half of the first washing tank. , A conveyor provided with a screw in the first half and formed in a sloping upward gently inclined gradient, facing the base end of a second cleaning tank for storing high-temperature water at a lower position of the tip of the conveyor, and performing the second cleaning. The bottom of the tank is formed with a gentle slope with a diagonal upward, a screw conveyor for PET bottle strips and a guide gutter are provided along the bottom of the tank, and a dewatering drum is installed at the lower part of the tip of the screw conveyor. The draining rotary vane multistage formed inside of the dewatering drum, provides a multi-stage washing dehydrator bottle strip formed by providing the exhaust rotary slats to the lower discharge chamber.

According to a third aspect of the present invention, a number of fixing pins project from one inner wall surface inside the housing of the high-speed washing machine, and a rotating disk is provided on the other inner wall surface. A large number of rotating pins protrude from the front side of the housing, and the plastic bottle strips fed into the housing are configured to be rubbed and cleaned by coming out between the fixed pins and the rotating pins that rotate at high speed. The present invention provides an apparatus for cleaning small PET bottles.

According to a fourth aspect of the present invention, the dewatering drum for the washed PET bottle strips is formed in a stepped shape from the upper part to the lower part in the order of small, medium and large, and the rotating shaft is set up at the center position inside the dewatering drum. The present invention provides a device for dewatering PET bottle strips, which is provided with a draining rotary blade plate having a large diameter in the order of small, medium and large from the upper part to the lower part.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Reference numeral 1 denotes a cyclone for storing PET bottle fragments X, which is a crusher (not shown) in a previous process.
PET bottle strip X cut to a size of several mm square with
(Hereinafter, also simply referred to as a strip) is caused to flow from the upper end inlet 2 of the cyclone 1 by pneumatic transport. In addition, as shown in FIG. 2, at the lower position of the cyclone 1,
A drop passage 3 for the stored strip X is provided, and an opening / closing damper 4 is provided at an intermediate position.

Reference numeral 5 denotes a screw conveyor provided at the bottom of the drop passage 3 for extruding the strip X, and M1 denotes a drive motor for driving the PET bottle strip X falling into the drop passage 3.
From the delivery opening 6 to the central position inside the housing 7 of the next high-speed rotary washer S.

Next, a high-speed rotary washing machine S installed on the gantry 8
Will be described. On the inner wall surface of the housing 7 on the opening 6 side, a number of fixing pins 9 are provided so as to project substantially in the horizontal direction. A rotating disk 10 is rotatably supported on the inner wall surface at the opposing position, and a number of rotating pins 11 project inwardly and outwardly on a concentric circle on the outer peripheral portion of the front surface of the rotating disk 10. The fixed pin 9 is disposed between the two inner and outer rotary pins 11 in an engagement relationship with a small gap therebetween. Reference numeral 12 denotes a rotating shaft of the rotating disk 9, which is rotated at a high speed by a driving motor M <b> 2 installed on the gantry 8. 4
Reference numeral 4 denotes an annular cushioning piece made of rubber, which is attached to the inner wall surface of the housing 7 at the outer peripheral position thereof so as to face the inner wall surface.

Numeral 13 denotes a water injection nozzle for sprinkling and supplying washing water to the inside of the housing 7, which is attached to a side body of the housing 7, and which is provided with a water supply pipe 14.
The piping is connected so that hot water in a second washing tank 24 described later is supplied by the circulation pump 15.

Reference numeral 16 denotes a drop passage at the bottom of the housing 7 of the high-speed rotary washing machine S. Reference numeral 17 denotes a first washing tank disposed immediately below the drop passage 16, and the bottom of the tank is formed to have a gentle upward slope. The conveyor tube 18 is connected to the tank at the front of the tank bottom at substantially the same inclination and gradient, and a mesh-shaped drainage hole 19 is formed at the bottom near the base end.

K is the strip X that has fallen into the first washing tank 17,
A conveyor for draining and transporting while stirring and washing in a relatively small amount of washing water in the tank, and is inserted and supported from the tank bottom of the first washing tank 17 to the conveyor tube 18. In the latter half of the conveyor K, a stirring blade 20 that is bent and formed in a crank shape is formed on the conveyor shaft on the bottom side of the first cleaning tank 17, and the first half of the first half that is inserted into the conveyor cylinder 18. On the conveyor shaft, rotating blades 21 for transporting the conveyor tube 18 while being drained by the drain holes 19 are formed in a spiral shape. M3 is a drive motor for rotating the conveyor K, and 22 is a drainage channel for washing water flowing out of the first washing tank 17 and for washing water, which is provided at the bottom of the drain hole 19.

Reference numeral 23 denotes a drop port formed at the bottom of the distal end of the conveyor tube 18, and reference numeral 24 denotes a second cleaning tank for storing high-temperature washing water at 80 to 90 ° C. The base end of which is located immediately below the drop port 23. It is facing. The bottom of the second cleaning tank 24 is inclined obliquely upward toward the tip with a gentle inclination.
As shown in FIG. 4, a guide gutter 25 having a U-shaped longitudinal section and a lower half portion having a porous mesh shape is provided on the upper side spaced apart from the bottom of the tank, substantially at the bottom of the second washing tank 24. At the same time, the guide gutter 25 is provided with a conveyer cylinder 26 at the front end of the guide gutter 25. Reference numeral 27 denotes a screw conveyor inscribed in the guide gutter 25. The screw conveyor 27 is fitted and supported with its tip end position facing the conveyor tube 26, and is rotated by a drive motor M4. 2
Reference numeral 8 denotes a discharge port for cleaning water containing floating dust and the like provided above the base end of the second cleaning tank 24, and reference numeral 45 denotes a discharge port 28 and a drain gutter of the drain passage 22.

Reference numeral 29 denotes a drop passage formed at the bottom of the tip end of the conveyor tube 26, and reference numeral 30 denotes a dehydration drum attached to the lower end of the drop passage 29, as shown in FIG. Three large steps are formed in the order of middle and large. Numeral 31 denotes a rotating shaft which rises from the lower part at the center position of the inside of the dewatering drum 30. At the upper part, three-stage draining rotary blades whose diameters increase from the upper part to the lower part and become larger in the order of small, medium and large. Plates 32, 33, 34
Are vertically arranged at intervals. Reference numeral 35 denotes a drum cover provided on an outer peripheral portion of the dewatering drum 30, and a drain gutter 36 is provided at a lower end thereof.

Reference numeral 37 denotes a discharge chamber formed on the bottom side of the dewatering drum with substantially the same diameter as the drum cover 35, and a discharge rotary blade plate 38 is attached to the rotation shaft 31 at the center of the chamber. That is, the discharge rotary blade plate 38 is pivotally supported at a lower position of the draining rotary blade plates 32, 33, 34, and these rotary blade plates 32-34, 38 are rotated by the drive motor M5. I have. Numeral 39 denotes a transport pipe attached at a position tangential to the outer periphery of the discharge chamber 37, and hot air is supplied from one of the inlets 40 for air transport.

Reference numeral 41 denotes a heater device arranged at the bottom of the second cleaning tank 24, which heats the cleaning water in the second cleaning tank 24, and at the same time, transports the strip X, which is pneumatically transported, through the transport pipe 39 with hot air. Piping is performed so that drying treatment is performed by transporting. 42
Is a blower, and 43 is an air transport pipe. Reference numeral 46 denotes a storage or storage container for the small pieces X provided at the distal end of the transport pipe 39.

The PET bottle is cut into several mm square in a crusher (not shown) in the previous step.
The PET bottle strip X is pneumatically transported to the cyclone 1 of the apparatus by a blower. Specified amount of strip X is cyclone 1
At the stage where the water is stored, the drive motors M1 to M5 of the present apparatus are operated, and at the same time, the circulation pump 15 is operated to start spraying water from the water injection nozzle 13 into the housing 7 of the high-speed rotary washer S.

First, the opening / closing damper 4 is opened to cause the strip X to flow down, and is sent to the next central position inside the high-speed rotary washing machine S by the screw conveyor 5 for extrusion from the drop passage 3. Inside the housing 7 of the high-speed rotary washing machine S,
Washing hot water is sprinkled from the water injection nozzle 13 and the rotating disk 10 provided with the rotating pin 11 is rotating at high speed. Therefore, the strip X fed into the housing 7 is given an appropriate centrifugal force by the rotating disk 10, and the inner and outer rotating pins 11 of the rotating disk 10 and the fixed pins 9 located therebetween are fixed. While being rubbed and washed between them, the water passes through the space and scatters in all directions via the buffer pieces 44 inside the housing 7, and then flows down from the falling passage 16 to the first cleaning tank 17 below. As a result, the strip X is strongly rubbed and washed, and the glue, the remaining label residue, the dirt, and the like adhering to the strip X are cleanly removed.

The PET bottle strip X containing the washing water that has flowed down to the first washing tank 17 is appropriately immersed in a relatively small amount of washing water at the bottom of the tank of the first washing tank 17, and the stirring blades 2 of the conveyor K are used.
0, while being rubbed and washed by being agitated by 0, is conveyed along the bottom of the tank with an obliquely upward slope and is sent out of the washing water, and at the stage where it is sent out from the washing water, the rotating blades 21 in the first half are
And the water is drained in the drain hole 19 and the conveyor tube 18 is drained and conveyed. The rubbing cleaning of the conveyor K by stirring with the stirring blades 20 and the rubbing cleaning of the high-speed rotary washer S complement the mutual cleaning power and significantly improve the cleaning effect.

Next, the drained strip X is placed in a conveyor tube 1
8 and dropped into a second washing tank 24 storing hot water, and the strip X immersed in the hot water is agitated and washed by a screw conveyor 27 supported on a gentle obliquely upward slope. While transporting the guide gutter 25. This dissolves the sugars and the like adhering to the small pieces X into the high-temperature water, promotes the floating of the dust and the like adhering to the small pieces X, discharges them from the discharge port 28 to the outside of the tank, and conveys foreign substances that do not float. At the stage, it is settled to the bottom of the tank by being pushed out and discharged from the guide gutter 25. Then, at a position near the tip of the screw conveyor 27, the conveyer tube 26 is gradually pushed out from the water of the second washing tank 24 while the strip X is being pushed out.
Drain and transport inside the cylinder.

The drained strip X is dropped into the dewatering drum 30 from the tip drop passage 29 of the conveyor cylinder 26,
After being dropped while rotating and dewatering sequentially by the three draining rotary blades 32, 33 and 34 provided inside the dewatering drum 30, the transport pipe 39 is carried out by the lowermost discharge rotary blade 38. At the same time, the carry-out is pneumatically conveyed by the warm air from the heater device 41, so that it is dried and stored until it is stored in a predetermined storage or container 46.

[0024]

According to the present invention, a method for multi-stage washing, dehydration and drying of the cut PET bottle pieces as described above and the multi-stage washing and dehydrating apparatus are used. It can greatly contribute to the reuse of waste plastic bottles by installing it in combination with a crusher at a collection facility in each place.

When cleaning small pieces of PET bottles, rubbing and cleaning are performed by a high-speed rotary cleaning machine having a unique configuration, and the cleaning is performed by stirring and cleaning in the first cleaning tank and in high-temperature water in the second cleaning tank. Equipped with a multi-stage cleaning structure that uses different methods of cleaning and transporting, which is excellent for cleaning and removing dirt from waste PET bottles, label pieces, glue, sugar, etc. attached to it, and as a reused resource The quality improvement is very remarkable.

[Brief description of the drawings]

FIG. 1 is a side view showing the entire apparatus of the present invention.

FIG. 2 is a front view showing the inside of a cyclone for storing small pieces and a high-speed rotary washer.

FIG. 3 is a sectional view showing a dewatering / discharging device.

FIG. 4 is a sectional view showing a screw conveyor and a guide gutter provided in a second cleaning tank.

[Explanation of symbols]

 X Pet bottle strip S High-speed rotary washer K Conveyor M1-M4 Drive motor 1 Cyclone 2, 40 Inlet 3, 16, 29 Drop passage 4 Opening / closing damper 5 Screw conveyor 6 Opening 7 Housing 8 Mount 9 Fixing pin 10 Rotating circle Plate 11 Rotating pin 12, 31 Rotating shaft 13 Water injection nozzle 14 Water supply pipe 15 Circulation pump 17 First cleaning tank 18, 26 Conveyor cylinder 19 Drain hole 20 Stirrer blade 21 Rotating blade 22 Drainage channel 23 Drop port 24 Second cleaning tank 25 Guide Gutter 27 Screw conveyor 28 Discharge port 30 Dewatering drum 32, 33, 34, 38 Rotating blade 35 Drum cover 36 Drain gutter 37 Discharge chamber 39 Transport pipe 41 Heater device 42 Blower 43 Air transport pipe 44 Buffer piece 45 Water collecting gutter 46 Container

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Claims (4)

[Claims] 1. A method for multi-stage washing, dehydration and drying of cut PET bottle pieces, comprising the following processing steps (1) to (4). (1) A step of storing the cut PET bottle pieces in a cyclone, sending the cut pieces from the cyclone to a high-speed rotary washer, and rubbing the mixture by stirring and pouring water in the high-speed rotary washer. (2) A step of dropping the rubbed and cleaned PET bottle pieces into the first washing tank, forming stirring blades in the second half, stirring and cleaning with a conveyor having rotating blades in the first half, and transporting the drainage. (3) Drop the drained PET bottle pieces from the tip of the conveyor into the second washing tank, and wash the PET bottle pieces immersed in the high-temperature water with the guide gutter and screw conveyor supported on a diagonally upward slope. While transporting,
A step of extruding and conveying from the water in the second washing tank at a position near the tip of the screw conveyor. (4) The extruded PET bottle pieces are dropped into the dewatering drum from the tip of the screw conveyer, and are dewatered by the rotating blades for draining provided inside the dewatering drum, and then transported by the rotating blades for discharging. A step of drying the pipe by unloading the pipe and transporting it with warm air. 2. A cyclone for storing cut PET bottle strips, a high-speed rotary washing machine for PET bottle strips at a lower end of the cyclone, and a nozzle for injecting washing water into the high-speed washing machine. A first washing tank is provided immediately below the high-speed rotary washing machine, the bottom of which is provided with a gently sloped obliquely upward slope. The first washing tank is provided with a stirring blade in the latter half and a screw in the first half. Provide a conveyor formed with a gentle slope of diagonally upward with a, facing the base end of the second washing tank for storing high-temperature water at the lower part of the tip of the conveyor, and the bottom of the second washing tank It is formed with a gentle slope of diagonally upward, a screw conveyor of PET bottle strips and a guide gutter thereof are provided along the bottom of the tank, a dewatering drum is provided at a lower part of the tip of the screw conveyor, and a dewatering drum is provided. A multi-stage washing and dewatering device for cut PET bottle fragments, wherein a multi-stage rotating blade plate for draining is formed inside and a rotating blade plate for discharging is provided in a lower discharge chamber. 3. A high-speed cleaning machine having a plurality of fixing pins protruding on one inner wall surface inside a housing, a rotating disk provided on the other inner wall surface, and a plurality of rotating disks provided on a front side of the rotating disk. The cutting is characterized in that a plurality of rotating pins are protrudingly provided, and the PET bottle strips fed into the housing are rubbed and cleaned by slipping between the fixed pins and the rotating pins that rotate at high speed. Cleaning equipment for washed PET bottles. 4. A dewatering drum for washed pet bottle strips is formed in a stepped shape from the upper part to the lower part in the order of small, medium and large, and a rotating shaft rising to the center position inside the dewatering drum has A dewatering device for cut PET bottle pieces, comprising a plurality of rotating drainage blades formed in the lower part in the order of small, medium and large in diameter.