JPH10165905A - Plastic bottle washing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic bottle washing apparatus by which high accuracy can be expected in the following sorting process and a label can be surely peeled off by improving washing ability for washing the surface of a plastic bottle. SOLUTION: This apparatus 1 is provided with a drum 2 being arranged in a housing 1a and wherein an inlet 21 is formed on one end and an outlet 22 is formed on another end, a delivering device 3 being arranged in a drum 2 and delivering plastic bottles in the drum 2 to the outlet 22, a washing nozzle 4 for spraying washing water to the plastic bottles in the drum 2 and a washing water feeding device 5 for feeding washing water to the washing nozzle 4. The washing water feeding device 5 is provided with a filter device 7 and is constituted in such a way that used washing water used for washing the plastic bottles is filtered by the filter device 7 and is used again as a washing water. The washing water feeding device 5 is constituted so as to feed a high temp. and high pressure washing water into the drum 2 through the washing nozzle 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic bottle cleaning apparatus for cleaning plastic bottles.

[0002]

2. Description of the Related Art In recent years, recycling of plastic bottles has been promoted. The plastic bottles made of various materials are on the market, and in order to reuse the plastic bottles, it is indispensable to sort various plastic bottles.

[0003]

As a method for sorting plastic bottles, there is a method based on materials and colors.
Plastic bottles are collected in garbage containers after they are used at home, etc.Therefore, many of them are dirty during the collection process. There is a problem in that sorting occurs, and the sorting accuracy is reduced.

[0004] Usually, plastic bottles are sold with a label attached to the surface, and it is essential to peel off the label from the plastic bottle for reuse.

[0005] Therefore, there has been a demand for a plastic bottle cleaning apparatus which can expect a high accuracy in the subsequent sorting step and can surely remove the label by increasing the cleaning ability for cleaning the surface of the plastic bottle. .

[0006]

According to a first aspect of the present invention, there is provided a plastic bottle cleaning apparatus for cleaning collected plastic bottles, wherein the plastic bottle cleaning apparatus is disposed in a housing. A drum having an input port formed at one end and a discharge port formed at the other end; a transfer device disposed in the drum, for transferring a plastic bottle inserted into the drum from the input port to the discharge port; A washing nozzle for injecting washing water into the plastic bottle therein, and a washing water supply device for supplying washing water to the washing nozzle.

According to a second aspect of the present invention, there is provided a plastic bottle cleaning apparatus, wherein the cleaning water supply device includes a filtering device, and the used cleaning water used for cleaning the plastic bottle is filtered by the filtering device. It is designed to be reused as washing water.

According to a third aspect of the present invention, in the plastic bottle cleaning device, the cleaning water supply device is configured to supply high-temperature and high-pressure cleaning water into a drum through a cleaning nozzle.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show a schematic configuration of a plastic bottle cleaning apparatus according to the present invention.

The plastic bottle cleaning apparatus 1 includes, for example, a drum 2 for receiving a plastic bottle carried out from a conveyor A, and a transport screw (transporter) provided in the drum 2 and transporting the plastic bottle in the drum 2. 3, a cleaning nozzle 4 for spraying cleaning water into the drum 2, and a cleaning water supply device 5 for supplying cleaning water to the cleaning nozzle 4.

Here, as the plastic bottle, P
ET (pet) bottles, PVC (polyvinyl chloride) bottles, HDPE (high-density polyethylene) bottles, PP (polypropylene) bottles, and the like are generally commercially available.

The drum 2 is disposed in the housing 1a, and has a charging port 21 formed at an upper end at one end. The hopper 211 connected to the charging port 21 is connected to the transport conveyor A.
Is disposed below the carry-out end.

The other end of the drum 2 is formed as an open discharge port 22, and an appropriate transfer conveyor B is provided.

A plurality of through holes 23 are formed in the peripheral surface of the drum 2 as shown in FIG. This through hole 2
Numeral 3 is formed in such a size that the plastic bottle in the drum 2 does not fall.

The transport screw 3 comprises a rotary shaft 31 arranged at the center of the drum 2 and a screw 32 provided integrally with the rotary shaft 31.
As the screw 32 rotates with the rotation of, the plastic bottle in the drum 2 is conveyed to the outlet 22.

The rotating shaft 31 is formed in a hollow shape so that washing water, which will be described later, can flow therein, and both ends thereof are pivotally supported.

A drive motor (not shown) is connected to one end of the rotation shaft 31 via a suitable transmission member, and the rotation shaft 31 is driven to rotate by the drive motor.

The washing nozzle 4 is, as shown in FIG.
A plurality is provided at appropriate intervals on the peripheral surface of the rotating shaft 31, and a plurality is provided at appropriate intervals on a pipe 41 provided on the outer peripheral surface of the drum 2 and in the axial direction thereof. ing.

Each of the cleaning nozzles 4 of the pipe 41 is disposed so as to face the through-hole 23 of the drum 2, and is configured to inject cleaning water from the cleaning nozzle 4 into the drum 2 through the through-hole 23. ing.

The rotating shaft 31 and the pipe 41
Is connected to a storage tank 6 of a washing water supply device 5 described later by a pipe 631 via a pump P, and supplies the washing water stored in the storage tank 6 to the rotating shaft 31 and the pipe 41 by driving the pump P. , From each washing nozzle 4 into the drum 2.

The cleaning water supply device 5 includes a storage tank 6 for storing cleaning water, and a filtration device 7.

As shown in FIG. 2, the storage tank 6 has a first storage section 61 which is used to store the used washing water which is injected into the drum 2, and the used washing water is filtered by a filtering device 7. It is divided into a second storage section 62 that stores the purified water.

The bottom of the first storage section 61 is
The outlet of the filtration device 7 is connected to the second storage section 62 through a pipe 633. Therefore, the dirty washing water in the first storage section 61 is introduced into the filtering device 7 and after being filtered by the filtering device 7,
It is stored in the second storage section 62 as clean water.

The first storage section 61 and the second storage section 62
A silencer 65 is provided at the bottom inside, and a pipe 634 connected to a steam generator (not shown) is connected to the silencer 65.

A water supply pipe 66 connected to a water supply device (not shown) is connected to the first storage section 61.

Reference numeral 67 shown in FIG. 2 denotes a dust removing device, which is provided at a discharge port 1b for discharging the cleaning water for washing the plastic bottle. Housed in basket 671. In addition, the washing water is introduced into the first storage unit 61 after passing through the dust removal device.

Reference numeral 68 denotes an exhaust pipe provided at an upper portion of the housing 1a, and an exhaust fan 681 provided at the exhaust pipe 68.
As a result, the air in the housing 1a is released to the outside air.

Reference numeral 71 denotes an automatic filter paper machine, which filters a discharge discharged when the filter 7 is washed through a filter paper, and stores the filtered filter in a sludge receiving box 72.

Reference numeral 69 denotes a valve provided on each pipe.

Next, the operation of cleaning the plastic bottle by the plastic bottle cleaning apparatus thus configured will be described.

The collected plastic bottles are loaded into the drum 2 from the loading port 21 via the hopper 211 by the conveyor A.

The plastic bottle put into the drum 2 is conveyed to the discharge port 22 side by the rotation of the conveying screw 3, and the surface of the plastic bottle is washed by the washing water jetted from the washing nozzle 4 during this conveyance. Are discharged from the discharge port 22.

The washing water jetted from the washing nozzle 4 is heated at a high temperature by the steam generator and at a high pressure by the jetting from the washing nozzle 4 supplied by the pump P. By spraying, the surface of the plastic bottle is cleanly cleaned, and the label attached to the surface is surely peeled off.

The washing water used for washing is introduced into the first storage section 61 from the outlet 1b of the housing 1a, filtered by the filtration device 7, and stored in the second storage section 62 as clean water. , And is used again by the pump P as the aforementioned washing water.

The plastic bottle thus washed and the label peeled off from the plastic bottle are:
It is conveyed to the subsequent process via the transfer conveyor B.

In the following steps, sorting for each material of the plastic bottle, color sorting, and the like are performed.

At the time of this sorting, since the surface of the plastic bottle is thoroughly cleaned by the above-described plastic bottle washing apparatus, for example, in the case of color sorting, the image can be photographed with a camera, thereby achieving high precision. Color judgment can be performed, and as a result, a colored plastic bottle and a transparent plastic bottle can be selected with high accuracy.

The color selection is usually performed after the selection for each plastic bottle material. For example, in the case of the most common plastic bottle among plastic bottles on the market, a colored PET bottle and a transparent PET bottle are used. Color selection is performed.

[0040]

As described above, according to the plastic bottle cleaning apparatus of the present invention, the cleaning ability for cleaning the surface of the plastic bottle can be enhanced,
High accuracy can be expected in the subsequent sorting step, and the label attached to the plastic bottle can be reliably peeled off, and reuse can be easily achieved.

[Brief description of the drawings]

FIG. 1 is a side view showing a plastic bottle cleaning device.

FIG. 2 is a flowchart showing a plastic bottle cleaning apparatus.

FIG. 3 is an enlarged view showing a cleaning nozzle.

[Description of Signs] 1 Plastic bottle cleaning device 1a Housing 2 Drum 21 Input port 22 Discharge port 3 Transport screw (transport device) 4 Cleaning nozzle 5 Cleaning water supply device 7 Filtration device

Continuation of front page (72) Inventor Mitsuaki Hirata 1-1, Shinmeiwa-cho, Takarazuka-shi, Hyogo Shinmeiwa Industry Co., Ltd. Environmental Systems Division

Claims (3)

[Claims] 1. A plastic bottle cleaning device for cleaning a collected plastic bottle, wherein the plastic bottle cleaning device is disposed in a housing, and has a charging port formed at one end and a discharge port formed at the other end. A transport device disposed in the drum and transporting a plastic bottle charged into the drum from the charging port to a discharge port; a cleaning nozzle for injecting cleaning water into the plastic bottle in the drum; A plastic bottle cleaning device, comprising: a cleaning water supply device for supplying cleaning water. 2. The cleaning water supply device according to claim 1, further comprising a filtering device, wherein the filtering device filters the used washing water used for washing the plastic bottle and reuses the used washing water again. Item 4. A plastic bottle cleaning device according to Item 1. 3. The plastic bottle cleaning device according to claim 1, wherein the cleaning water supply device is configured to supply high-temperature and high-pressure cleaning water into a drum via a cleaning nozzle.