WO2008126951A1

WO2008126951A1 - Synthetic resin waste disposal apparatus with gas feed-back hole

Info

Publication number: WO2008126951A1
Application number: PCT/KR2007/001861
Authority: WO
Inventors: Bum-Sik Kim
Original assignee: J-HAN GLOBAL Co Ltd
Current assignee: J-HAN GLOBAL Co Ltd
Priority date: 2007-04-17
Filing date: 2007-04-17
Publication date: 2008-10-23
Anticipated expiration: 2009-10-17

Abstract

A synthetic resin waste disposal apparatus includes a melting and feeding unit including a body, a hopper disposed at one side of the body to charge synthetic resin waste into the body, a discharge port disposed at the other side of the body to discharge recycled rubber and a screw disposed in the body to feed the synthetic resin waste; a driving unit for rotationally driving the screw of the melting and feeding unit; a heating chamber enclosing the melting and feeding unit and including a burner disposed below the melting and feeding unit; and at least one gas feed-back hole formed through a bottom of the melting and feeding unit to introduce a gas generated during melting of the synthetic resin waste into the heating chamber.

Description

SYNTHETIC RESIN WASTE DISPOSAL APPARATUS WITH GAS FEEDBACK HOLE

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates to a synthetic resin waste disposal apparatus with a gas feed-back hole, and more particularly to a disposal apparatus capable of introducing a gas generated during melting of synthetic resin waste into a heating chamber directly without using an external line, thereby reducing the time taken to reheat the gas to its ignition temperature.

Description of the Related Art

In recent years, along with the development of the petrochemical industry, the production amount of the various products made of synthetic resin, rubber and organic material is highly increasing. Accordingly, waste of such products is rapidly increasing. Since the synthetic resin waste is not decomposed by microbes, the amount of the synthetic resin waste is accumulated year after year, thereby causing environmental pollution.

Particularly, agricultural or industrial vinyl waste is mainly incinerated. However, in the incineration process, a large amount of noxious gas is emitted to cause environmental pollution such as air pollution. F'urther, it causes problems such as an ineffective use of resources.

In order to overcome the above-mentioned problems caused by the synthetic resin waste, a method for recycling the synthetic resin waste by using a disposal apparatus has been proposed. That is, the pollution problem can be resolved and the synthetic resin waste can be used as a secondary resource by charging the synthetic resin waste into a heating furnace, heating and pressing the synthetic resin waste during a feeding process to produce recycled plastic, and cooling and cutting the recycled plastic to produce useful products such as plastic chips .

Generally, the disposal apparatus for recycling the synthetic resin waste includes a melting and feeding unit. The melting and feeding unit includes a body, a hopper disposed at one side of the body to charge synthetic resin waste such as vinyl waste into the body and a screw disposed inside the body to have a number of wing pieces formed at its periphery. The synthetic resin waste is charged into the hopper and then fed by the screw. Further, the disposal apparatus further includes a heating chamber enclosing the melting and feeding unit and a discharge port. The synthetic resin waste fed along the screw is heated and melted into a gel-like substance by a burner provided at a lower portion of the heating chamber. Then, the melted synthetic resin waste is discharged outside through the discharge port.

Meanwhile, in a process of melting the synthetic resin waste using the above-mentioned disposal apparatus, an incomplete combustion gas is generated. Since the incomplete combustion gas is a poisonous gas, it causes pollution when it is discharged outside. Accordingly, the generated gas is collected in the melting and feeding unit and introduced into the heating chamber including the burner through an additional external line. Thus, the generated gas can be used as a fuel in a recycling manner.

However, a recycled gas is naturally cooled according to the outside temperature while it is transferred through the external line. Accordingly, the recycled gas introduced into the heating chamber has a fairly low temperature. It takes long time to reheat the recycled gas to its ignition temperature. Further, the synthetic resin waste is nonuniformly heated during the reheating of the recycled gas, thereby causing degrading quality of the products and lowering heating efficiency.

SUMMARY OF THE INVENTION

Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a synthetic resin waste disposal apparatus with a gas feed-back hole capable of introducing a gas generated during melting of synthetic resin waste into a heating chamber directly without using an external line, thereby reducing the time taken to reheat the gas to its ignition temperature.

In accordance with an aspect of the present invention, there is provided a synthetic resin waste disposal apparatus comprising: a melting and feeding unit including a body, a hopper disposed at one side of the body to charge synthetic resin waste into the body, a discharge port disposed at the other side of the body to discharge recycled rubber and a screw disposed in the body to feed the synthetic resin waste; a driving unit for rotationally driving the screw of the melting and feeding unit; a heating chamber enclosing the melting and feeding unit and including a burner disposed below the melting and feeding unit; and at least one gas feed-back hole formed through a bottom of the melting and feeding unit to introduce a gas generated during melting of the synthetic resin waste into the heating chamber.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 shows a perspective view of a disposal apparatus according to one embodiment of the present invention; FIG. 2 shows a cross-sectional view of the disposal apparatus shown in FIG. 1;

FIG. 3 shows an enlarged view of a portion indicated by a circle A in FIG. 2;

FIG. 4 shows a perspective view of a disposal apparatus according to another embodiment of the present invention; and

FIG. 5 shows a cross-sectional view of the disposal apparatus shown in FIG. 4.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

Hereinafter, preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are used only for illustrative purposes, and the present invention is not limited thereto.

FIG. 1 shows a perspective view of a disposal apparatus according to one embodiment of the present invention. FIG. 2 shows a cross-sectional view of the disposal apparatus shown in

FIG. 1. FIG. 3 shows an enlarged view of a portion indicated by a circle A in FIG. 2. As shown in the drawings, the disposal apparatus according to the embodiment of the present invention includes a melting and feeding unit 10 having a screw 12 to feed synthetic resin waste along the screw 12, a driving unit 20 for rotationally driving the screw 12 of the melting and feeding unit 10 and a heating chamber 30 having a burner 31 for heating the synthetic resin waste in the melting and feeding unit 10.

The melting and feeding unit 10 includes a body having a tubular structure and provides a space for the synthetic resin waste to be heated and melted. The melting and feeding unit 10 further includes a hopper 11 disposed at one side of the body to charge the synthetic resin waste such as vinyl waste into the body and a discharge port 13 disposed at the other side of the body to discharge recycled rubber. Further, the screw 12 disposed inside the body has a continuous wing piece formed at its periphery to feed the synthetic resin waste.

Further, at least one gas feed-back hole 15 leading to the heating chamber 30 is formed through the bottom of the melting and feeding unit 10. A gas generated during melting of the synthetic resin waste is introduced directly into the heating chamber 30 through the gas feed-back hole 15 to be used as a fuel.

As described above, since the gas generated during melting of the synthetic resin waste is introduced directly into the heating chamber 30 through the gas feed-back hole 15 without using an additional external line, the gas can be introduced while maintaining its temperature. Thus, it is possible to reduce the time taken to reheat the gas to its ignition temperature and improve heat efficiency. Further, a U-shaped gas feed-back tube 16 may be installed on the gas feed-back hole 15. When the gas passing through the gas feed-back hole 15 encounters fire or hot air generated from the burner 31 of the heating chamber 30, the gas may be blocked from entering into the heating chamber 30 to flow back into the melting and feeding unit 10. The U-shaped gas feed-back tube 16 allows the gas to be discharged in the same direction as the fire, thereby preventing the gas from flowing back into the melting and feeding unit 10 such that the gas can easily flow into the heating chamber 30. Further, the screw 12 preferably has a taper shape to have a diameter gradually increasing toward the discharge port 13. In this case, a space between the screw 12 and the melting and feeding unit 10 gradually becomes smaller toward the discharge port 13, thereby increasing compressibility of the recycled rubber.

The driving unit 20 for rotating the screw 12 in the melting and feeding unit 10 includes a main motor 21 for generating a driving force based on power externally supplied to the main motor, a gear box 22 for properly reducing a rotational force of the main motor 21, and a shaft 23 for transferring the driving force from the main motor 21 to the screw 12.

The heating chamber 30 enclosing the melting and feeding unit 10 includes a specified inner space and the burner 31 below the melting and feeding unit 10. The burner 31 supplies heat for melting the synthetic resin waste to the melting and feeding unit 10.

Preferably, a circulation line may be additionally installed at the top portion of the heating chamber 30 to separately collect the gas generated during melting of the synthetic resin waste and to introduce the collected gas into the heating chamber 30.

FIG. 4 shows a perspective view of a disposal apparatus according to another embodiment of the present invention. FIG. 5 shows a cross-sectional view of the disposal apparatus shown in FIG. 4.

As shown in FIGS. 4 and 5, circulation lines 40' and 40" are installed at a top portion of the heating chamber 30. The gas that fails to flow into the heating chamber 30 through the gas feed-back hole 15 and the gas feed-back tube 16 may be discharged outside through the hopper 11 or the discharge port

13. The circulation lines 40' and 40" can collect the gas to be discharged outside through the hopper 11 or the discharge port

13 and introduce the collected gas into the heating chamber 30. Thus, the gas discharge amount can be further reduced by installing the circulation lines 40' and 40".

The disposal apparatus having the above configuration is operated as follows.

First, the synthetic resin waste such as cleaned and dried vinyl waste is charged into the hopper 11 and introduced into the melting and feeding unit 10. Then, the synthetic resin waste is pressed and fed along the screw 12 that is driven by the main motor 21 and rotated at a proper reduction ratio by the gear box 22. During pressing and feeding, the synthetic resin waste is heated and melted into a gel-like substance by a burner 31 of the heating chamber 30. Then, the melted synthetic resin waste is discharged outside through the discharge port 13.

Further, the gas generated during melting of the synthetic resin waste is introduced into the heating chamber 30 through the gas feed-back hole 15 or the gas feed-back tube 16 formed on the bottom of the melting and feeding unit 10. The gas is mixed with air inside the heating chamber 30 to be used as a fuel for heating the synthetic resin waste. In the disposal apparatus operated as described above according to the present invention, the gas generated in the process of manufacturing the recycled rubber by melting and pressing the synthetic resin waste is introduced directly into the heating chamber through the gas feed-back hole or the gas feed-back tube without using an additional external line. Thus, the gas can be introduced into the heating chamber while maintaining its temperature, and it is possible to reduce the time taken to reheat the gas to its ignition temperature. Therefore, the conventional problems such as nonuniform heating of the synthetic resin waste are overcome, thereby improving quality of the products. Further, there is no need to install an additional external line, thereby reducing an installation cost and improving heat efficiency.

As described above, in the synthetic resin waste disposal apparatus with a gas feed-back hole according to the present invention, the gas generated during melting of the synthetic resin waste is introduced directly into the heating chamber through the gas feed-back hole without using an additional external line. Thus, the gas can be introduced into the heating chamber while maintaining its temperature, and it is possible to reduce the time taken to reheat the gas to its ignition temperature. Therefore, the conventional problems such as nonuniform heating of the synthetic resin waste are overcome, thereby improving quality of the products. Further, there is no need to install an additional external line, thereby reducing an installation cost and improving heat efficiency.

Although the preferred embodiment of the present invention has been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

WHAT IS CLAIMED IS:

1. A synthetic resin waste disposal apparatus comprising: a melting and feeding unit including a body, a hopper disposed at one side of the body to charge synthetic resin waste into the body, a discharge port disposed at the other side of the body to discharge recycled rubber and a screw disposed in the body to feed the synthetic resin waste; a driving unit for rotationally driving the screw of the melting and feeding unit; a heating chamber enclosing the melting and feeding unit and including a burner disposed below the melting and feeding unit; and at least one gas feed-back hole formed through a bottom of the melting and feeding unit to introduce a gas generated during melting of the synthetic resin waste into the heating chamber .

2. The synthetic resin waste disposal apparatus according to claim 1, further comprising a U-shaped gas feed-back tube installed on the gas feed-back hole.

3. The synthetic resin waste disposal apparatus according to claim 1 or 2, further comprising a circulation line installed at a top portion of the melting and feeding unit to collect the gas generated during melting of the synthetic resin waste at the hopper and the discharge port and to introduce the collected gas into the melting and feeding unit.

4. The synthetic resin waste disposal apparatus according to claim 3, wherein the screw has a taper shape to have a diameter gradually increasing toward the discharge port.

5. The synthetic resin waste disposal apparatus according to claim 4, wherein the driving unit includes a main motor for generating a driving force based on power externally supplied to the main motor, a gear box for reducing a rotational force of the main motor, and a shaft for transferring the driving force from the main motor to the screw.