WO1995012092A1

WO1995012092A1 - Method and apparatus for incineration of wastes

Info

Publication number: WO1995012092A1
Application number: PCT/KR1994/000146
Authority: WO
Inventors: Joo Hee Lee; Kyung Rock Lee
Original assignee: Joo Hee Lee; Kyung Rock Lee
Priority date: 1993-10-25
Filing date: 1994-10-24
Publication date: 1995-05-04
Also published as: KR960014708B1; KR950011907A; AU8005094A

Abstract

Method and apparatus for incineration of wastes are disclosed. The apparatus includes an incinerator (30) provided with a heating wire (32) and containing lead therein. A pressing plate (34), is hinged to the incinerator and presses down the wastes in the incinerator. A liquid collect tank (50) having a cooling chamber (52) is connected to a liquid outlet port (30A) of the incinerator through a liquid drain pipe (38). A plurality of liquid collectors (60) are connected to the side wall of the liquid collect tank, so that the liquid collectors are leveled with interfaces between liquid wastes contained in the liquid collect tank. A net strainer (90) is provided about the incinerator and picks up unburnt solid wastes floating in the melted lead. A pressure control cylinder (70) which will control gas pressure of the incinerator is connected to a gas exhaust (30B) port of the incinerator.

Description

METHOD AND APPARATUS FOR INCINERATION OF WASTES

BACKGROUND OF THE INVENTION

Field of the Invention

The present invention relates in general to systems for incineration of wastes and, more particularly, to an improvement in method and apparatus for incineration of wastes for throwing varieties of wastes into an incinerator without classification of wastes according to classes and for dividing and collecting unburnt materials in liquid phase according to specific weights after incineration of wastes, thus to make the collected materials preferably reused.

Description of the Prior Art

Conventionally, wastes prior to incineration are classified into combustible wastes and noncombustible wastes prior to picking reusable materials out of the classified wastes. In addition, wet wastes are divided from the combustible wastes and, thereafter, burnt up. The wet wastes may be subjected to a drying step prior to incineration. However, the above waste incinerating method causes waste of labor and requires accessory equipments for classification of wastes and drying of wet wastes, thus to increase the cost of waste incinerating apparatus.

SUMMARY OF THE INVENTION

It is, therefore, an object of the invention to provide method and apparatus for incinerating wastes in which the above problems can be overcome by separately collecting solid materials floating in an incinerator and by separately collecting varieties of materials in liquid phase. In order to accomplish the above object, waste incinerating apparatus of the invention includes an incinerator provided with a heating wire and containing lead therein, a pressing plate hinged to the incinerator, a liquid drain pipe extending from a liquid outlet port of the incinerator to a liquid collect tank, the liquid collect tank having a cooling chamber, a plurality of liquid 5 collectors connected to the side wall of the liquid collect tank through their pipes, so that the liquid collectors are leveled with interfaces between liquid wastes contained in the liquid collect tank, a net strainer for picking up unburnt solid wastes floating in the melted lead, and a 10 pressure control cylinder for controlling gas pressure of the incinerator, the pressure control cylinder being connected to a gas exhaust port of the incinerator.

BRIEF DESCRIPTION OF THE DRAWINGS

15

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: 20 Fig. 1 is a view showing a construction of waste incinerating apparatus in accordance with a preferred embodiment of the invention;

Figs. 2A and 2B are views showing a structure of a pressing plate of the apparatus of Fig. 1, in which: 25 Fig. 2A is a perspective view of the pressing plate: Fig. 2B is a sectional view of the pressing plate taken along the section line A-A of Fig. 2A; and

Fig. 3 is a perspective view of a net strainer of the waste incinerating apparatus of invention.

30

DESCRIPTION OF THE PREFERRED EMBODIMENTS

With reference to Fig. 1, there is shown a construction of waste incinerating apparatus in accordance with a

3.5 preferred embodiment of the invention. As shown in this drawing, the waste incinerating apparatus includes an incinerator 30 which is provided with a heating wire 32. The incinerator 30 contains lead Pb therein. The incinerator 30 is provided with a pressing plate 34. The pressing plate 34 will press down the wastes thrown into the incinerator 30, so that the wastes are immersed in the melted lead of the incinerator 30. A plurality of electromagnets 34A are provided on the bottom surface of the pressing plate 34. Placed under the incinerator 30 is a liquid collect tank 50 which will contain varieties of liquids therein. The varieties of liquids, which were dissolved in the melted lead of the incinerator 30 and floated on the surface of the melted lead, are contained in the tank 50 in multi-layers according to their specific weights. A plurality of liquid collectors 60 are connected to a side wall of the tank 50, so that the collectors 60 are leveled with the interfaces between the liquids contained in the tank 50 respectively. The top of the incinerator 30 is covered with an openable lid 36. The incinerator 30 is also provided with a pressure control cylinder 70 which will be operated by the gas pressure generated in the hermetically sealed incinerator 30 and controls the gas pressure of the incinerator 30.

Installation of the above waste incinerating apparatus is shown in Fig. 1. A horizontal wall 10 is holed so as to form a waste throwing hole defined by a side surface 12. The waste throwing hole is provided with an openable door 14 w ich is hinged to the surface 12 of the horizontal wall 10, so that the door 14 will be turned downwardly from the horizontal position to the vertical position and opened. A waste container 20 is mounted on the bottom surface of the horizontal wall 10. The container 20 is located under the waste throwing hole of the wall 10, so that the container 20 receives the wastes therein when the door 14 is opened. The bottom plate 22 of the container 20 is hinged to a side wall of the container 20, so that the bottom plate 22 is openable.

The incinerator 30 is located under the waste container 20, so that the incinerator 30 receives the wastes therein when the openable bottom plate 22 of the container 20 is opened. The incinerator 30 is provided with the heating wire 32 in its side wall and in its bottom as described above. The pressing plate 34 hinged to the interior surface of the side wall of the incinerator 30 has a plurality of rectangular through holes 34b spaced out at regular intervals as shown in Figs. 2A and 2B. The pressing plate 34 is hinged to the incinerator 30, so that the plate 34 is immersed in the melted lead when the plate 34 is in the horizontal position.

The pressing plate 34 is a metal plate and is provided with the plurality of electromagnets 34A on the bottom surface. When the electromagnets 34A are turned on, the pressing plate 34 is magnetized. The top of the incinerator 30 is covered with the openable lid 36.

An outlet port 30A is formed in an upper section of the side wall of the incinerator 30. The outlet port 30A is connected to a liquid drain pipe 38 which in turn extends to the liquid collect tank 50. The tank 50 is provided with cooling chamber 52 in its side wall. The plurality of liquid collectors 60 are connected to the side wall of the tank 50 through their discharge pipes 54, so that the collectors 60 are leveled with the interfaces between the liquids contained in the tank 50 respectively. A gas exhaust port 30B is formed on the side wall of the incinerator 30 above the liquid outlet port 30A. The gas outlet port 30B is connected to a gas inlet of the pressure control cylinder 70. The cylinder 70 is provided with a gas outlet as well as the gas inlet. In the present invention, each of the liquid collectors 60 may be provided with a secondary cooling chamber.

The waste incinerating apparatus of the invention also includes a net strainer 90 of Fig. 3 about the incinerator 30. The net strainer 90 which is bent into U shape will be used for picking up the unburnt solid materials floating in the melted lead of the incinerator 30. The unburnt solid materials picked up by the net strain 90 will be collected by additional means (not shown).

The incinerator 30 contains a predetermined amount of lead Pb therein as described above.

In the drawings, the reference numerals 39 and 55 denote valves respectively.

When starting the above apparatus, the heating wire 32 is turned on and heats the lead and melts the lead. After melting the lead in the incinerator 30, the openable lid 36 of the incinerator 30 is opened prior to turning the pressing plate 34 upwardly. After turning the plate 34 upwardly, the wastes heaped on the openable door 14 are dropped into the waste container 20 by turning the door 14. The wastes in turn are dropped into the melted lead of the incinerator 30 by turning the openable bottom plate 22 of the container 20.

Thereafter, the pressing plate 34 is turned downwardly so as to be located in its horizontal position. The plate 34 thus makes the wastes immersed in the melted lead and incinerated. During incineration of wastes, the synthetic resin materials such as PVC are melted into liquid phase and rise to the surface of the melted lead, while wood materials are burnt up so as to become charcoal. The other solid wastes, that is, the noncombustible stones or metals whose specific weights are lower than the specific weight of the lead float in the melted lead. The liquids above the pressing plate in the incinerator 30 are discharged from the incinerator 30 through the liquid outlet port 30A and flows in the drain pipe 38 so as to be collected in the liquid collect tank 50. At this time, the valve 39 is opened. The varieties of liquids are contained in the tank 50 in multi¬ layers according to their specific weights. After the liquids are contained in the tank 50, the valves 55 of the discharge pipes 54 connected to the side wall of the tank 50 are orderly opened in such a manner that the valve 55 of the uppermost pipes 54 is first opened and the valve 55 of the lowermost pipe 54 is last opened, the liquids of different specific weights are discharged from the tank 50 to their collectors 60. The liquids collected by the collectors 60 may be reused. However, useless liquids are solidified so as to reduce the volume, thus to simplify waste treatment. The cooling chamber 52 of the liquid collect tank 50 cools the high temperature liquids contained in the tank 50.

The upper space of the incinerator 30 closed by the openable lid 36 is charged with gas generated by the wastes. The gas in the upper space of the incinerator 30 expands, so that the gas is discharged from the incinerator 30 through the exhaust port 30B and introduced into the pressure control cylinder 70 through the gas inlet of the cylinder 70. The gas acts on the bottom of the piston received in the cylinder 70, thus to push up the piston. The gas is, thereafter, exhausted from the cylinder 70 to the outside through the gas outlet of the cylinder 70. That is, the pressure of gas generated by the wastes in the incinerator 30 automatically closes or opens the gas inlet and the gas outlet of the cylinder 70, so that the gas pressure of the incinerator 30 is controlled and prevents possible breakage of the incinerator 30 due to high pressure.

In the present invention, it is preferred to connect gas collecting means to the gas outlet of the cylinder 70. In this case, the exhaust gas may be reused.

After incineration of wastes, the openable lid 36 is opened prior to turning on the electromagnets 34A of the pressing plate 34. The pressing plate 34 having the magnets 34A is turned upwardly, so that ferrous metals floating in the melted lead are attracted to the magnets 34A and stuck to the magnetized plate 34. Thereafter, the ferrous metals stuck to the plate 34 are separated from the plate 34 by turning off the magnets 34A and collected by metal collecting means.

Stones or aluminums which still float in the melted lead after the magnetic treatment for the ferrous metals are picked up by the net strainer 90. That is, the net strainer 90 of Fig. 3 is immersed into the melted lead in the incinerator 30 and moved horizontally and took out of the melted lead, thus to pick up the stones or aluminums floating in the melted lead. The wood materials deformed into charcoal are reburnt in the bottom of the incinerator 30 using an additional burner, thus to save electric power for the heat wire 32 of the incinerator 30.

The metals having specific weights larger than the specific weight of the melted lead sink to the bottom of the incinerator 30. Such sunken metals may be picked up by a hook (not shown). As described above, the method and apparatus for incineration of wastes according to the present invention let varieties of wastes be thrown into the incinerator without classification of the wastes according to classes. In the incinerator of the invention, the combustible materials are burnt up so as to become liquids, while the noncombustible materials float in the melted lead of the incinerator. The liquids of the combustible materials are separately collected by liquid collectors according to their specific weights. The ferrous metals and nonferrous materials of the noncombustible materials floating in the melted lead are picked up and separately collected. In this regard, the method and apparatus for incineration of wastes of the invention readily treat the wastes and effectively collect reusable materials out of the wastes. Another advantage of the invention is resided in that the apparatus of the invention is simplified in its construction, thus to be reduced in its cost.

Although the preferred embodiments of the present invention have 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 method for incineration of wastes comprising the steps of: turning on a heating wire so as to heat and melt lead contained in an incinerator, said incinerator having the heating wire for heating the lead and being hermetically closed by an openable lid; pressing down the wastes using a pressing plate after throwing the wastes into the melted lead, thus to make the wastes be immersed in the melted lead; magnetizing the pressing plate so as to pick up unburnt ferrous wastes floating in the melted lead, said pressing plate having a plurality of electromagnets; discharging varieties of liquid wastes having different specific weights dissolved in the melted lead and floated on the surface of the melted lead to a liquid collect tank, said liquid wastes being contained in the liquid collect tank in multi-layers according to their specific weights; separately discharging the liquid wastes from the liquid collect tank to a plurality of liquid collectors, said liquid collectors being connected to a side wall of the liquid collect tank, so that the collectors are leveled with interfaces between the liquid wastes contained in the liquid collect tank respectively; and relieving gas pressure of the hermetically closed incinerator by discharging pressurized gas of the incinerator to a pressure control cylinder, thus to prevent breakage of the incinerator due to the gas pressure.

2. Apparatus for incineration of wastes comprising: a horizontal wall holed so as to form a waste throwing hole, said waste throwing hole being closed by an openable door; a waste container mounted on the bottom surface of the horizontal wall so as to be placed under the waste throwing hole, a bottom plate of the waste container being hinged to a side wall of the container so as to be openable; an incinerator placed under the waste container, said incinerator having a heating wire and containing lead therein and being covered with an openable lid; a pressing plate for pressing down the wastes in the incinerator and for immersing the wastes in the lead melted by the heating wire, said pressing plate being hinged to an a side wall of the incinerator; a liquid drain pipe extending from a liquid outlet port formed in an upper section of the side wall of the incinerator to a lower section of a liquid collect tank; said liquid collect tank having a cooling chamber; a plurality of liquid collectors connected to the side wall of the liquid collect tank through their pipes, so that the liquid collectors are leveled with interfaces between liquid wastes contained in the liquid collect tank; a net strainer for picking up unburnt solid wastes floating in the melted lead, said net strainer being provided about the incinerator; and a pressure control cylinder for controlling gas pressure of the incinerator, said pressure control cylinder having a gas inlet and a gas outlet and connected at said gas inlet to a gas exhaust port formed on the side wall of the incinerator above the liquid outlet port.

3. The apparatus according to claim 2, wherein said pressing plate has a plurality of through holes as well as a plurality of electromagnets, said electromagnets being provided on a bottom surface of the pressing plate.