JPH1194219A - Waste disposal furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of a waste disposal furnace and to miniaturize it by reducing the size of a melting furnace connecting for communication between an incinerator and the melting furnace, combusting waste inside the incinerator and melting combustion residue inside the melting furnace by the melting heat inside the melting furnace. SOLUTION: A waste disposal furnace 1 is connected for communication with a cylindrical melting furnace 3 at the lower part of a rectangular incinerator 2, arranged with a waste feeding conveyer 4 at the upper part of the incinerator 2 and arranged with a melting object discharging conveyer 5 from the lower part to the side part of the incinerator 2. The surrounding walls 10 of the incinerator 2 are formed with multiple air feeding holes 12 on the front, back, right and left side parts along the right and left surfaces of the surrounding walls 10. Feeding air from the air feeding holes 12 and utilizing the melting heat generated by the melting furnace 3, the waste is incinerated and then, combustion residue remaining not incinerated inside the incinerator 2 is melted by a combustion burner 18 and the melted object is stored in a melted object remaining part 17.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a waste treatment furnace.

[0002]

2. Description of the Related Art Conventionally, in the treatment of waste, a method of incineration by burning the waste with a burner has been adopted, but in this method, the ash generated when the waste is incinerated is discarded again. Needed to be processed. Therefore, a waste treatment method in which waste is melted at a high temperature by a melting furnace and the melt is reused as aggregate of concrete products or the like has been considered.

In such a melting furnace, a main burner as a heat source for melting the waste is disposed in the melting furnace, and an inlet for charging the waste is formed on a side portion of the melting furnace.
At the top of the melting furnace, an exhaust port for discharging the gas generated by melting of the waste is formed, and at the bottom of the melting furnace, a discharge port for discharging the molten waste is formed. In some cases, an auxiliary burner for maintaining the molten state of the waste is provided nearby.

[0004]

However, in the above-mentioned conventional melting furnace, the discharge port is formed at the lower part of the melting furnace, while the exhaust port is formed at the upper part of the melting furnace. Since the heat of melting the material is discharged to the outside through the exhaust port together with the gas, it is necessary to use a large main burner to completely melt the waste using only the main burner. As a result, the cost of the apparatus was increased.

[0005]

Therefore, according to the present invention, the incinerator and the melting furnace are connected and connected so that the waste in the incinerator is burned by the heat of melting in the melting furnace, and the melting in the melting furnace is performed. It was configured to melt the combustion residues.

Further, a plurality of air supply pipes are connected to the incinerator, and each air supply pipe is provided with a flow control valve.

In the melting furnace, the inner peripheral wall is formed in a cylindrical shape, and a combustion burner is disposed on the inner peripheral wall in a direction tangential to the inner peripheral wall.

Further, a radiator is disposed immediately above the melting furnace.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A waste treatment furnace according to the present invention is obtained by connecting a substantially cylindrical melting furnace to the lower part of a substantially rectangular box incinerator.

[0010] The waste heat in the incinerator is burned by the heat of fusion in the melting furnace, and the combustion residue is melted.

[0011] Therefore, the combustion residue generated in the incinerator can be treated at the same time as the incineration, and only the combustion residue is melted instead of the entire waste.
The size of the melting furnace can be reduced, and the cost and size of the waste treatment furnace can be reduced.

In the incinerator, a plurality of air supply pipes are connected and connected to the peripheral wall, and a flow control valve is provided in each air supply pipe, whereby the amount of air supplied from each air supply pipe can be adjusted by the flow control valve. Therefore, the combustion state inside the incinerator can be appropriately adjusted, and incomplete combustion of waste due to insufficient air volume can be prevented.

[0013] In addition, the waste to be incinerated can be dispersed almost uniformly inside the incinerator by the wind pressure of the air supplied from the air supply pipe, and the incineration efficiency inside the incinerator can be improved. .

In the melting furnace, a hot burner is mounted on the inner peripheral wall in a direction tangential to the inner peripheral wall, so that a high-temperature gas swirls and flows at an upper portion of the molten material to maintain the molten material at a high temperature. You can do it.

Further, the combustion residue falling from the incinerator to the melting furnace also swirls inside the melting furnace with the swirling flow of the high-temperature gas, and by the centrifugal action of the swirling flow,
It collides with the inner peripheral wall of the melting furnace, melts and becomes liquid, and adheres to the inner peripheral wall, and other combustion residues are adsorbed to the liquid molten deposit, and the other combustion residues are sequentially melted,
The melting efficiency can be improved.

Further, in the melting furnace, a radiator is disposed at a position above the melting furnace, so that the radiator radiates the heat of fusion rising from the melting furnace to the melting furnace and maintains the inside of the melting furnace at a high temperature. Is what you can do.

[0017]

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

FIGS. 1 to 3 show a waste treatment furnace 1 according to the present invention. The waste treatment furnace 1 has a substantially rectangular box-type incinerator 2 and a substantially cylindrical melting furnace. 3 is connected and connected,
A waste input conveyor 4 is provided above the incinerator 2, and a melt discharge conveyor 5 is provided from the lower side to the side of the incinerator 2. In the figure, reference numeral 6 denotes a support.

In the incinerator 2, a lid 7 is disposed at the upper part of the lid 7 so as to be openable and closable. The waste input conveyor 4 is connected to the hole 8. In the figure, 9 is a screw conveyor.

Then, the crushed or crushed waste is distributed almost equally to four waste input holes 8 by the waste input conveyor 4, and is input into the incinerator 2 from each waste input hole 8. ing.

The incinerator 2 has a peripheral wall 10 formed in a constricted shape from the upper end to the lower end, and an exhaust duct 11 is communicatively connected to a substantially central portion of a rear surface of the peripheral wall 10. A plurality of air supply holes 12 are formed in each part substantially along the left and right surfaces of the peripheral wall 10, and an air supply pipe 13 is
And a flow control valve 14 is provided in each air supply pipe 13. In the figure, reference numeral 15 denotes a communication pipe for connecting a blower (not shown) and the air supply pipe 13 in communication.

Then, air is supplied from the air supply hole 12,
As will be described later, waste heat is burned by utilizing the heat of fusion generated in the melting furnace 3.

At this time, since the flow control valve 14 is provided in each air supply pipe 13, the amount of air supplied from each air supply hole 12 is adjusted by the flow control valve 14 so that the inside of the incinerator 2 is The combustion state of the waste can be appropriately adjusted, and incomplete combustion of waste due to an insufficient amount of air can be prevented.

Further, among the wastes falling downward from the charging hole 8 due to the wind pressure of the air supplied from the air supply hole 12, the lighter ones fall toward the inside of the incinerator 2 and have a lower weight. Heavy objects fall down as they are,
Therefore, the waste is substantially uniformly dispersed inside the incinerator 2, and the incineration efficiency inside the incinerator 2 can be improved.

In the melting furnace 3, a raised portion 16 is formed substantially at the center of the bottom surface, a molten material storage portion 17 is formed around the raised portion 16, and two combustion chambers are formed on an inner peripheral wall 23 of the melting furnace 3. The burner 18 is attached to the inner peripheral wall 23 in a tangential direction.

The combustion residue remaining without being incinerated inside the incinerator 2 is melted by a combustion burner 18 and the melt is stored in a melt storage unit 17.

At that time, since the combustion burner 18 is arranged in the tangential direction of the melting furnace 3, the high-temperature gas swirls and flows at the upper part of the melt, thereby maintaining the melt at a high temperature. be able to.

Further, the combustion residues falling from the incinerator 2 to the melting furnace 3 also swirl inside the melting furnace 3 with the swirling flow of the high-temperature gas, and the centrifugal action of the swirling flow causes the melting residue. It collides with the inner peripheral wall 23 of the furnace 3, melts and becomes liquid, and adheres to the inner peripheral wall 23. Then, other combustion residues are adsorbed to the liquid fusion deposit, and the other combustion residues are sequentially melted, so that the melting efficiency can be improved.

Further, the swirling high-temperature gas rises from the melting furnace 3 to the incinerator 2 with the heat of melting, and the inside of the incinerator 2 is brought into a high temperature state by the heat of melting, and the waste in the incinerator 2 is heated. Can be burned.

As described above, by connecting the incinerator 2 and the melting furnace 3 in communication, the waste heat in the incinerator 2 can be burned by the heat of fusion in the melting furnace 3 and
The combustion residues can be melted, so that the combustion residues generated in the incinerator 2 can be treated simultaneously with the incineration.

Further, only the combustion residue is melted instead of the entire waste, so that the melting furnace 3 can be downsized, and the cost and size of the waste treatment furnace 1 can be reduced. be able to.

In this embodiment, the inside of the melting furnace 3 is maintained at about 1300 ° C. by the combustion burner 18 and the incinerator 2 is heated.
The temperature inside is maintained at about 800 ° C.

In the melting furnace 3, a melt discharge hole 19 is formed substantially at the center of the raised portion 16, and the melt discharge conveyor 5 is connected to the melt discharge hole 19. In the figure, reference numeral 20 denotes a molten material forced discharge pipe.

At a position above the melting furnace 3, a radiator 21 for radiating the heat of melting raised from the melting furnace 3 toward the melt storage unit 17 is provided. That is, the support protrusion 22 is formed at the lower end of the incinerator 2 toward the inside of the incinerator 2, and the radiator 21 is placed on the support protrusion 22.

As described above, by radiating the melting heat rising from the melting furnace 3 to the melting furnace 3 by the radiator 21,
Since the inside of the melting furnace 3 can be maintained at a high temperature state by effectively utilizing the heat of fusion generated by the combustion burner 18, a small-sized combustion burner 18 can be used, and the size of the apparatus can be reduced. .

[0036]

The present invention is embodied in the form described above, and has the following effects.

(1) According to the first aspect of the present invention, since the incinerator and the melting furnace are connected and connected, the waste heat in the incinerator can be burned by the heat of fusion in the melting furnace. The combustion residues can be melted, so that the combustion residues generated in the incinerator can be treated simultaneously with the incineration.

Further, only the combustion residue is melted instead of the entire waste, so that the melting furnace can be downsized and the cost and size of the waste treatment furnace can be reduced. it can.

(2) According to the second aspect of the present invention, a plurality of air supply pipes are connected to the incinerator, and each air supply pipe is provided with a flow control valve. By adjusting the amount of air supplied from each of the air supply pipes, the combustion state inside the incinerator can be appropriately adjusted, and incomplete combustion of waste due to an insufficient amount of air can be prevented.

Further, the waste to be incinerated can be dispersed almost uniformly inside the incinerator by the wind pressure of the air supplied from the air supply pipe, and the incineration efficiency inside the incinerator can be improved.

(3) According to the third aspect of the present invention, in the melting furnace, the inner peripheral wall is formed in a cylindrical shape, and a combustion burner is disposed on the inner peripheral wall in a tangential direction of the inner peripheral wall. Therefore, the high-temperature gas swirls and flows above the melt, and the melt can be maintained at a high temperature.

Moreover, the combustion residues falling from the incinerator to the melting furnace also swirl inside the melting furnace with the swirling flow of the high-temperature gas, and the centrifugal action of the swirling flow causes
It collides with the inner peripheral wall of the melting furnace, melts and becomes liquid, and adheres to the inner peripheral wall, and other combustion residues are adsorbed to the liquid molten deposit, and the other combustion residues are sequentially melted,
Melting efficiency can be improved.

(4) According to the fourth aspect of the present invention, since the radiator is disposed immediately above the melting furnace, the radiator radiates the heat of fusion rising from the melting furnace to the melting furnace. In addition, the inside of the melting furnace can be maintained at a high temperature.

[Brief description of the drawings]

FIG. 1 is a front view showing a waste treatment furnace according to the present invention.

FIG. 2 is a right side view of the same.

FIG. 3 is a plan view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waste treatment furnace 2 Incinerator 3 Melting furnace 12 Air supply hole 13 Air supply pipe 14 Flow control valve 18 Combustion burner 21 Radiator 23 Inner peripheral wall

Claims (4)

[Claims] An incinerator (2) and a melting furnace (3) are communicatively connected to burn waste in the incinerator (2) by the heat of fusion in the melting furnace (3). (3) A waste treatment furnace characterized in that the combustion residue is melted in the furnace. 2. The incinerator (2) has a plurality of air supply pipes (13).
The air supply pipe (13) has a flow control valve
The waste treatment furnace according to claim 1, wherein (14) is provided. 3. The melting furnace (3) has an inner peripheral wall (23) formed in a cylindrical shape and a combustion burner (18) formed on the inner peripheral wall (23).
The waste treatment furnace according to claim 1 or 2, wherein the wastewater treatment furnace is disposed in a direction tangential to the inner peripheral wall (23). 4. A radiator (2) is located immediately above the melting furnace (3).
The waste treatment furnace according to any one of claims 1 to 3, wherein 1) is provided.