JP2000018553A - Secondary treatment apparatus for incineration ash - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a reduction in capacity of incineration ash generated at a city garbage incinerator. SOLUTION: Iron 3 is stored at a storage part 2 within a body box 1. Incineration ash 30 fed from a chute 10 flows down on a slope part 5 being pushed by blocks 8a and 8b to be supplied to the storage part 2. Flame is jetted from a burner 12A toward the incineration ash 30 on the slope part 5 to accomplish a concentrated heating of the incineration ash 30. The body box is made cylindrical so that heat is concentratedly radiated onto the incineration ash 30 on the slope part 5 from an internal wall surface presenting a circularly curved surface. The incineration ash 30 sent to the storage part 2 is further heated therein to be fully melted and flows in a downflow path 18 running over a wall part 9 down onto a conveyor 22 in a water tank 20. In the water tank 20, the ash is quickly cooled to be turned to a vitreous slag 30' and discharged from the water tank 20 by the conveyor 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a secondary incineration ash processing device for converting incinerated ash generated in a municipal solid waste incinerator or the like into slag for volume reduction.

[0002]

2. Description of the Related Art Garbage from homes and offices is collected by a garbage truck and incinerated in an incinerator. Therefore, a large amount of incineration ash is discharged from the incinerator every day.

[0003]

At present, local governments and the like have a problem in treating large amounts of incinerated ash. Therefore, an object of the present invention is to provide a secondary treatment device and a secondary treatment method for incinerated ash that can reduce the volume of incinerated ash generated in a municipal waste incinerator.

[0004]

According to the present invention, there is provided a secondary treatment device for incinerated ash, comprising: a storage portion provided inside a main body box;
A slope portion for causing the incineration ash to flow down to the storage portion, a feeding means for feeding the incineration ash on the slope portion to the storage portion, and a heating means for radiating heat toward the incineration ash flowing on the slope portion by the feeding means. With.

In the above construction, the incinerated ash is sent to the storage section on the slope by the feeding means. In this case, the incinerated ash is sent to the storage section by the feeding means toward the storage section on the slope. Is heated intensively, sent to the storage section at a high temperature, preferably in a molten state, further heated in the storage section and completely incinerated.

Preferably, the cross-sectional shape of the inner wall surface of the main body box is a curved surface, and heat in the main body box is radiated intensively from the inner wall surface to the incineration ash on the slope. . According to this configuration, the heat stored in the inner wall of the main body box is radiated intensively toward the incineration ash sent toward the storage portion on the slope, and the incineration ash can be heated more efficiently.

[0007] Preferably, the feeding means comprises an upwardly convex block having a grounding surface which is in contact with the slope, and a power unit for moving the block forward and backward.
According to this configuration, the incineration ash on the slope is rubbed up by the block and rises in a mountain shape on the block. Therefore, the surface area (heat receiving area) increases, and the heating means is heated with high thermal efficiency.

Preferably, iron is stored in the storage part, and the incinerated ash is supplied on the iron. According to this configuration, the incineration ash is heated more efficiently by the heat generated by the iron.

Preferably, coke is spread over the reservoir. According to this configuration, it is possible to prevent the molten incinerated ash or iron from sticking to the inner surface of the storage section.

[0010] Preferably, a water tank for cooling and solidifying the molten ash flowing out of the storage section and a discharge means for discharging slag generated by solidification in the water tank from the water tank are provided. According to this configuration, the molten ash can be rapidly cooled and solidified to generate a relatively small slag, and the slag can be easily used as a building material, earthen wood, or the like for secondary use.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view of a secondary incineration ash treatment apparatus, FIG. 2 is an enlarged sectional view of a storage section, FIG. 3 is a perspective view of incineration ash feeding means, and FIG. 4 is a sectional view of a main body box.

In FIG. 1, a main body box 1 is constructed by turning a cylinder sideways with a heat-resistant material such as a brick. In the center of the inside of the main body box 1, a storage portion 2 for incinerated ash is formed of a heat-resistant material such as brick. Iron 3 such as piece-shaped pig iron is stored in the storage unit 2. As shown in FIG. 3, an overflow portion 9 a is formed in the side wall 9 of the storage portion 2 by partially notching. The coke 40 is spread inside the storage part 2, and the iron 3 is put on the coke 40.

In FIG. 1, a supply port 4 for incinerated ash is opened on a side surface of the main body box 1. A slope 5 having a downward slope is provided between the supply port 4 and the storage section 2. On the side of the supply port 4, a receiving table 6 is provided at the same gradient as the slope 5, and a cylinder 7 as a power unit is provided on the receiving table 6.

In FIGS. 1 and 3, a box-shaped first block 8a is connected to a rod 7a of a cylinder 7. The second block 8b is connected to the front surface of the first block 8a. The shape of the second block 8b is an upward convex shape (in this example, a triangular pyramid shape), and is a sharp shape having a sharp tip. The flat bottom surface of the second block 8b is a grounding surface that is grounded on the cradle 6 and the slope portion 5. Therefore, when the rod 7a of the cylinder 7 protrudes and retracts, the first block 8a and the second block 8b slide on the cradle 6 and the slope 5 to move forward while rubbing the incineration ash 30 on the slope 5, and then retreat. I do. When moving forward, the incineration ash 30 rising on the second block 8b at the front surface 8a 'of the first block 8a is pushed forward.

In FIG. 1, a chute 10 for supplying incineration ash 30 onto the receiving table 6 is provided on the upper side of the supply port 4. A cover plate 11 is provided on the outer surface of the main body box 1. Therefore, the heat of the main body box 1 is prevented from escaping to the outside due to the heat insulating property of the air between the main body box 1 and the cover plate 11.

[0016] Garbage discharged from each home or office is collected by a garbage truck and incinerated in a garbage incinerator.
Fluorite 50 is preferably mixed with the incineration ash 30 generated by this incineration. In FIG. 2, the fluorite 50 is finely crushed. Incineration ash 3 mixed with fluorite 50
Zeros are thrown in from the chute 10 and accumulated on the receiving table 6 (arrow A in FIG. 1). Then, when the cylinder 7 is operated to advance the blocks 8a and 8b, the incineration ash 30 flows down the cradle 6 and the slope 5 by the blocks 8a and 8b, and is supplied onto the iron 3 stored in the storage section 2. (Arrow B). That is, the cylinder 7 and the blocks 8a and 8b
It is a sending means for sending 0 to the storage unit 2.

The incineration ash 30 that accumulates on the cradle 6 and the slope 5 tends to stick on the slope 5. Therefore, the second block 8b is made sharp as described above, and the bottom surface thereof is grounded to the slope 5, so that the incineration ash 30 stuck on the cradle 6 and the slope 5 is scraped up and excavated (arrow in FIG. 4). a), it can be sent to the storage unit 2.
In this case, the surface layer of the incineration ash 30 on the slope 5 is intensively heated by the burner 12B and melted. Then, the unmelted new incinerated ash 30 is sent in such a way as to be pushed into the lower side of the molten ash of the surface layer melted by the blocks 8a and 8b, and dug into the surface layer as shown by an arrow a in FIG.
Therefore, the newly fed unmelted incinerated ash 30 does not fly up due to the flame pressure of the burner 12B and is scattered, but is preferably sent to the storage section 2 in a substantially molten state.

In FIG. 1, burners 12A and 12B as heating means and oxygen supply means 1 are provided in a main body box 1.
3. A pipe-shaped iron supply means 14 is provided. The burners 12A and 12B are provided on the peripheral wall of the main body box 1. One burner 12A blows out a flame toward the iron 3 and the incineration ash 30 in the storage unit 2. The other burner 12B blows out a flame toward the incineration ash 30 on the slope 5. The oxygen supply means 13 comprises a lance, and is connected to an oxygen supply device (not shown). The oxygen supply means 13 is disposed below the slope 5, and blows out oxygen or air into the storage 2. The iron supply means 14 is provided on the ceiling of the main body box 1, and the iron 3 put into the iron supply means 14 falls into the storage section 2.

The incinerated ash 30 is preferably substantially melted on the slope 5 and sent to the storage section 2.
Is completely melted by sending oxygen or air by the oxygen supply means 13 to burn the coke 40. Also, by mixing fluorite 50 with incineration ash 30,
The incineration ash 30 can be melted at a relatively low temperature, and fuel consumption can be reduced. In addition, the storage section 2 is susceptible to thermal degradation, and when the thermal degradation occurs, it is necessary to replace the bricks. Therefore, the frequency of replacing bricks can be reduced accordingly, which is advantageous in maintenance management of the storage unit 2.

The molten ash overflows the stepped overflow portion 9a of the wall portion 9 (arrow C), and flows down from the opening portion 17 to the downward flow path 18 thereunder (arrow D). An exhaust gas discharge path 19 is formed in the middle of the flow-down path 18 in a lateral direction, and the exhaust gas is discharged from the discharge path 19 (arrow F). A water tank 20 is provided below the downflow path 18. Water 21 is stored in the water tank 20. Inside the water tank 20, a conveyor 22 is disposed as slag discharging means. The inside of the flow-down passage 18 is kept at a high temperature, so that the incineration ash in the flow-down is cooled and solidified so as not to become a large lump.

This secondary incineration ash treatment apparatus is constructed as described above. Next, a secondary incineration ash treatment method will be described.
In FIG. 1, incineration ash 30 introduced from a chute 10 is shown.
Flows down the slope 5 and is supplied to the reservoir 2. In this case, the incineration ash 30 stuck on the cradle 6 and the slope 5 is
It is supplied to the storage unit 2 while being dug up by the second block 8b and pressed by the front surface 8a 'of the first block 8a.

In this case, the burner 12B radiates heat intensively toward the incineration ash 30 on the slope 5 and heats the incineration ash 30 on the slope 5. Further, in this case, since the main body box 1 is cylindrical, its cross-sectional shape is a circular surface, and the heat stored on the inner wall, which is a circular surface, is radiated intensively to the slope portion 5 and the storage portion 2 (see arrow K in FIG. 4). ), The incineration ash 30 can be heated with high thermal efficiency. The inner wall surface of the main body box 1 is not limited to a strictly curved surface, but may be a substantially curved surface. In other words, the inner wall surface is formed into a curved surface so that heat can be radiated intensively toward the slope portion 5 and the storage portion 2. Should be fine. By intensively heating the incineration ash 30 on the slope 5 as described above, the surface layer of the incineration ash 30 is melted. Then, as described above, a new incineration ash 3 is formed below the surface molten layer by the blocks 8a and 8b.
0 is sent. The incineration ash 30 is preferably completely or almost completely melted before reaching the storage section 2.

The iron 3 in the storage section 2 is heated to a high temperature by the burner 12A to become molten iron.
When oxygen and air are blown out into the molten iron, the carbon contained in the molten iron reacts violently with oxygen, and
The temperature becomes higher than ° C, and the coke 40 also burns. When the unmelted incinerated ash 30 flows into the high-temperature molten iron, the incinerated ash 30 is rapidly heated by the heat of the molten iron and the combustion heat of the coke 40 to be completely melted. The molten ash generated by completely melting the incineration ash 30 in this way overflows the overflow portion 9a of the wall 9 (arrow C).
It flows down the downflow path 18 and falls into the water tank 20 (arrow D).
Since the iron 3 is gradually reduced by being vaporized or mixed with the molten ash, the iron 3 is appropriately supplied from the iron supply means 14.

The molten ash that has fallen into the water tank 20 is rapidly cooled and solidified to form a slag 30 '. This slag 30 'is glassy. The conveyor 22 in the water tank 20 is slowly rotating, and the slag 30 ′ on the conveyor 22 is discharged from the water tank 20 by the conveyor 22 and accumulates on the floor (arrow E). The molten ash 30 may be released into the atmosphere and cooled and solidified by air cooling. The air cooling ensures sufficient strength of the slag and is advantageous as an aggregate for concrete. Therefore, a pulverizing step is required. On the other hand, when the molten ash 30 is dropped into the water tank 20 and solidified by water cooling as in the present embodiment, the molten ash 30 is crushed into relatively small soybean-sized clumps in water, and the secondary ash is easily used. However, if solidified by water cooling, the strength of the slag will be lower than in the case of air cooling.

The molten incineration ash 30 and iron 3 are stored in the storage 2
If it adheres to the inner surface, cleaning and maintenance of the storage unit 2 become difficult. Therefore, in this embodiment, the coke 40 is spread inside the storage unit 2. The coke 40 has an action of protecting the inner surface of the storage unit 2, and prevents the molten incineration ash 30 and the iron 3 from sticking. Therefore, cleaning and maintenance management of the storage section 2 can be easily performed. The coke 40 is replaced and replenished as appropriate.

As described above, the incinerated ash 30 becomes slag 30 ', and its volume is reduced to about 1/3. Also slag 3
0 'is heated to a high temperature and melted and solidified, resulting in a hard vitreous material. Therefore, even if it is dumped in a mountainous area or a landfill, the internal components elute and cause environmental problems. Never.

The present invention is not limited to the above embodiment. For example, iron does not always need to be stored in the storage section.
Further, the coke 40 does not necessarily have to be spread. As a heating means, a plasma means or the like other than the burner can be applied. The incineration ash 30 may be preheated before being put into the chute 10.

[0028]

As described above, according to the present invention, the incinerated ash is heated efficiently and completely melted in a short time,
The volume can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of a secondary incineration ash processing apparatus.

FIG. 2 is an enlarged sectional view of a storage unit.

FIG. 3 is a perspective view of incineration ash supply means.

FIG. 4 is a sectional view of the main body box.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body box 2 Storage part 3 Iron 4 Supply port 5 Slope 7 Cylinder 8a 1st block 8b 2nd block 10 Chutes 12A, 12B Burner 13 Oxygen supply means 14 Iron supply means 17 Opening 18 Downflow path 20 Water tank 22 Conveyor 30 Burning Ash 30 'Slag 40 Coke 50 Fluorite

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[Procedure amendment]

[Submission date] May 19, 1999 (1999.5.1
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

3. to reservoir the iron to the reservoir, a secondary processing device ash according to claim 1 or 2, characterized in that it has to supply the ash on the iron.

4. The secondary treatment apparatus ash according to any one of claims 1 to 3, characterized in that paved coke into the reservoir.

5. A water tank for cooling and solidifying the molten ash flowing out of the reservoir, the slag produced by solidifying in a water bath according to claim 1-4, characterized in that a discharge means for discharging from the water bath The secondary treatment device for incinerated ash according to any one of the above.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

According to the present invention, there is provided a secondary treatment device for incinerated ash, comprising: a storage portion provided inside a main body box;
A slope portion for causing the incineration ash to flow down to the storage portion, a feeding means for feeding the incineration ash on the slope portion to the storage portion, and a heating means for radiating heat toward the incineration ash flowing on the slope portion by the feeding means. In the secondary processing device provided with
The cross-sectional shape of the inner wall surface of the main body box is a curved surface,
The heat in the main body box is transferred from this inner wall surface to the slope
Intensify radiation toward the incineration ash, and
The sending means includes a first block and a first block.
The second block provided on the front and these blocks
A power unit for moving forward and backward, and the second block
The ground is an upwardly convex shape having a grounding surface that touches the slope.
In addition, by making the shape sharp, the burning on the slope
Scrub up the ashes and dig up to move forward,
It is exposed from the second block of the first block.
Forward the incineration ash that swelled on the second block at the front
It was sent. Also preferably, the second block
The shape was a triangular pyramid, and the shape was the upper convex shape and the sharpened shape.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

In the above construction, the incinerated ash is sent to the storage section on the slope by the feeding means. In this case, the incinerated ash is sent to the storage section by the feeding means toward the storage section on the slope. Is heated intensively, sent to the storage section at a high temperature, preferably in a molten state, further heated in the storage section and completely incinerated. This place
If the cross section of the inner wall of the main body box is curved
The heat inside the main box is incinerated from this inner wall surface on the slope.
By radiating intensively toward the ashes, the body box
The heat stored on the inner wall of the heat sink is sent to the storage on the slope.
Intensively radiated toward the incinerated ash
Heating can be performed efficiently. Also in this case,
A first block and a front surface of the first block;
The second block provided with
And the second block is a slope.
It has an upward convex shape with a grounding surface
Scraps incineration ash on slopes by making it sharp
To move forward while excavating, and the first block
On the second block with the front exposed from the second block
The ashes that swelled in the area to be pushed forward
The incineration ash on the slope was rubbed into the second block
Then, it rises in a mountain shape on the second block. Therefore
Surface area (heat receiving area) increases, and the heating means
Well heated. Incineration in the second block
The ash is securely pushed toward the reservoir by the front of the first block.
Sent.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Deleted

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Deleted

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

In FIGS. 1 and 3, a box-shaped first block 8a is connected to a rod 7a of a cylinder 7. The second block 8b is connected to the front surface of the first block 8a. The shape of the second block 8b is an upward convex shape (in this example, a triangular pyramid shape), and is a sharp shape having a sharp tip. The flat bottom surface of the second block 8b is a grounding surface that is grounded on the cradle 6 and the slope portion 5. Therefore, when the rod 7a of the cylinder 7 protrudes and retracts, the first block 8a and the second block 8b slide on the cradle 6 and the slope 5 to move forward while rubbing the incineration ash 30 on the slope 5, and then retreat. I do. When moving forward, the second block
The incineration ash 30 rising on the second block 8b is pushed forward at the front surface 8a 'of the first block 8a exposed from the rack 8b .

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction contents]

[0028]

According to the present invention, as described above,
The cross section of the inner wall surface of the body box is curved,
The heat in the box is transferred from this inner wall to the incineration ash on the slope.
Radiating intensively, the inner wall of the main body box
The heat stored in the furnace is transferred to the storage section on the slope
The ash is radiated intensively toward the incineration ash, making the incineration ash more efficient.
It can be heated well. Also in this case, the sending means
Are the first block and the front surface of the first block.
The second block and move these blocks forward and backward
And the second block is grounded on the slope.
It has an upwardly convex shape and a sharp
By rubbing the incineration ash on the slope
And the second block of the first block
Incineration ash rising on the second block at the front exposed from
To be pushed forward, the burning on the slope
The ashes are rubbed into the second block, and on the second block
Rises in a mountain shape. Therefore, its surface area (heat receiving surface
Product) is increased, and the heating means is efficiently heated.
The incineration ash that swelled on the second block is the first block
Can be pushed securely to the storage part by the front of
You. Therefore, according to the present invention, the incinerated ash can be heated efficiently and completely melted in a short time, and the volume can be greatly reduced.

Claims (6)

[Claims] 1. A storage portion provided inside a main body box, a slope portion for causing incineration ash to flow down into the storage portion, a feeding means for feeding incineration ash on the slope portion to the storage portion, and a slope formed by the feeding means. And a heating means for radiating heat toward the incineration ash flowing down the upper part of the incineration ash. 2. A sectional shape of an inner wall surface of the main body box is a curved surface, and heat in the main body box is radiated intensively from the inner wall surface to incineration ash on the slope. The secondary treatment device for incinerated ash according to claim 1, wherein: 3. An apparatus according to claim 1, wherein said feeding means comprises an upwardly convex block having a grounding surface which is in contact with said slope portion, and a power section for moving said block forward and backward. Secondary incineration ash treatment equipment. 4. The secondary treatment of incinerated ash according to claim 1, wherein iron is stored in said storage section, and said incinerated ash is supplied onto said iron. apparatus. 5. The secondary incineration ash treatment apparatus according to claim 1, wherein coke is spread over the storage section. 6. A tank according to claim 1, further comprising a water tank for cooling and solidifying the molten ash flowing out of said storage section, and discharging means for discharging slag generated by solidification in said water tank from said water tank. The secondary treatment device for incinerated ash according to any one of the above.