JPH1144415A - Incinerating method and incinerating furnace - Google Patents

Abstract

PROBLEM TO BE SOLVED: To positively burn material to be incinerated. SOLUTION: A hearth 120 having water permeability is formed of heat resistant member obtained by mixing gravel with sand in a combustion chamber 2 formed in a furnace body 100. An air supply tube 130 having a plurality of discharge ports 130a is embedded in the hearth 120. A water supply system is connected, in addition to an air supply system, to the tube 130. In the case of burning material to be incinerated of the chamber 2, water is previously supplied to the tube 130 via the water supply system, stored in the tube 130 and the hearth 120 is wetted therein. Thus, even when melted plastic is stored in the hearth 1 while the material is burned to the degree of about 1/4, it is cooled with the water of the hearth 120, and solidified so as not to be introduced into the tube 130. When the material is burned to the degree of about 1/4, the air is supplied from the air supply system to the tube 130 to give the air to the material directly on the hearth 120 via the ports 130a and the heath 120 to completely burn the material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an incineration method and an incinerator, and in particular, discharges air from a hearth toward an incinerator while the incinerator placed in a combustion chamber burns from top to bottom. The present invention relates to an incineration method and an incinerator for promoting combustion.

[0002]

2. Description of the Related Art The method of incineration of waste by a fixed-bed incinerator is as follows. The incineration material is introduced from the inlet at the top of the combustion chamber to the vicinity of the ceiling of the combustion chamber, and the paper waste
Light the wood chips and close the opening with a lid. Then, a fire circulates around the upper end of the incinerated material in contact with the air, and starts burning.
When the upper end of the incineration material is burning, the part immediately below the burning part is heated to a high temperature. Then, as the combustion of the upper end of the incinerated material progresses, the material at the upper end becomes exhausted by the combustion and is discharged to the outside, so that the substance gradually disappears, and the portion immediately heated to a high temperature immediately becomes air. Touch and start burning. As the combustion of the newly started portion progresses, the lower portion is heated to a high temperature, the newly started portion gradually loses its substance, and the lower portion comes into contact with air and starts burning. Hereinafter, similarly, the incineration material in the combustion chamber gradually decreases in volume while burning from top to bottom.
The exhaust gas generated by the combustion enters the cyclone from the combustion chamber through the flue, hits the side wall of the cyclone by swirling, and drops soot and dust, and is discharged from the chimney to the atmosphere.

Conventionally, there is a fixed-bed incinerator of a type in which air is forcibly supplied from the outside to a combustion chamber to promote combustion and suppress occurrence of incomplete combustion. An example of this forced air incinerator is shown in FIGS. Reference numeral 1 denotes a box-shaped furnace body formed of a strong refractory material such as an irregular refractory material (refractory castable) or heat-resistant concrete. Reference numeral 3 denotes an inlet for the incineration material opened at the upper part of the furnace body 1. Reference numeral 4 denotes a sliding lid that moves left and right in FIG. 3 to open or close the inlet 3. Reference numeral 5 denotes the combustion chamber 2 and the cyclone 6. The communicating flue, 7 is a chimney. Inside the furnace body 1, air supply pipes 8 to 11 horizontally arranged in a frame shape are buried vertically in four stages, and are provided between each air supply pipe 8 to 11 and the side wall surface of the furnace body 1. Are communicated by a number of discharge pipes 8a to 11a.

An air supply pipe 13 is embedded in the hearth 12 of the furnace body 1 in a Y-shape.
3 and the hearth surface of the furnace body 1 are communicated by a number of discharge pipes 13a. Each of the air supply pipes 8 to 11 and 13 is connected to one fan (not shown) installed outside the furnace body 1 via air blow pipes 14 to 18, respectively. Blower tube 1
On-way valves 19 to 23 are provided in the middle of 4 to 18, respectively.

[0005] A method of incinerating waste using the fixed-bed incinerator thus configured will be described. The on-off valve 1
9 to 23 are all assumed to be closed. First, lid 4
Is slid in the direction of arrow A to open the inlet 3, and various wastes are thrown into the vicinity of the ceiling of the combustion chamber 2 from the inlet 3 as incineration materials (see the dashed line C in FIG. 3). Set the paper and wood chips on the fire. Then, the lid 4 is slid in the direction of arrow B to close the insertion port 3. Then, a fire circulates around the upper end of the incinerated material in contact with the air, and starts burning. Here, a fan (not shown) is operated, the on-off valve 19 is opened, and each of the discharge pipes 8a is blown through the blower pipe 14 and the air supply pipe 8.
From the combustion chamber 2 toward the upper end of the incinerated material. As a result, sufficient air is supplied to the upper end of the incineration material, so that it is almost completely burned. Exhaust gas is flue 5
After passing through the cyclone 6 and hitting the wall by swirling to remove soot and dust, it is released from the chimney 7 to the atmosphere.

[0006] When the upper end of the incineration material is burning, a portion immediately below the burning portion is heated to a high temperature. Then, as the combustion of the upper end of the incinerated material progresses, the material at the upper end becomes exhausted by the combustion and is discharged to the outside, so that the substance gradually disappears, and the portion immediately heated to a high temperature immediately becomes air. Touch and start burning. With the progress of the combustion of the newly started portion, the lower portion is heated to a high temperature, the newly started portion gradually loses the substance, and the lower portion starts burning by touching air. . Hereinafter, similarly, the incineration material in the combustion chamber gradually decreases in volume while burning from top to bottom.

At the timing when the burned portion of the incinerated material comes close to the discharge pipe 9a, the on-off valve 20 is also opened, and the blower pipe 15,
Air is discharged from each discharge pipe 9a through the air supply pipe 9 toward the burning portion of the incineration object. As a result, the combustion portion of the incineration material is supplied with sufficient air, so that it is almost completely burned. The combustion proceeds, and the burned part of the incineration material is discharged pipe 1
At the timing near 0a, the on-off valve 21 is also opened,
Each of the discharge pipes 10a is provided via the air pipe 16 and the air supply pipe 10.
The air is discharged toward the combustion portion of the incineration material from the air, and further combustion proceeds. At the timing when the combustion portion of the incineration material comes close to the discharge pipe 11a, the on-off valve 22 is also opened, and the blower tube 1 is opened.
7. Air is discharged from each of the discharge pipes 11a through the air supply pipe 11 toward the burning portion of the incineration object. In this way, the combustion portion of the incineration material is always supplied with sufficient air, so that it is almost completely burned.

When the burning portion of the incinerated material approaches the hearth 12, the supply of air to the incinerated material decreases, and the incinerated material starts to remain as a carbonaceous material called incineration. In order to avoid this, at an appropriate timing during which the combustion of the incinerated material has progressed from top to bottom (for example, when the combustion of the incinerated material has progressed by about half of the total,
2), the opening / closing valve 23 is also opened, and each of the discharge pipes 1 is connected through the blower pipe 18 and the air supply pipe 13.
Air is discharged from 3a to the burning portion of the incineration material immediately above the hearth 12, thereby promoting combustion so that no carbonaceous material remains. When all the incinerated materials burn, the fan is stopped and ash is discharged from the combustion chamber 2. Here, the discharge of air from the discharge pipe 13a is not performed from the early stage of combustion of the incineration material.
This is because, if plastic waste and gel waste oil are mixed in the incinerated material, when the incinerated material starts burning, the combustion heat becomes high temperature and the plastic waste melts,
Further, the gel waste oil is fluidized to form a slurry, and the molten plastic and the fluidized waste oil descend in the incineration material and accumulate on the hearth 12. When air is discharged from the hearth 12, combustion of molten waste plastic and fluidized waste oil starts, but at this time, a large amount of CO ₂ is generated. When the incinerated still remain many into the combustion chamber 2, because becomes incomplete combustion state is surrounded by the CO ₂ portion excessive during combustion of the top of the incinerated.

[0009]

However, as described above, the discharge of air from the discharge pipe 13 is started while the burning of the incinerated material proceeds from top to bottom.
Since the discharge pipe 13a provided on the hearth 12 is upward, a part of the molten plastic waste and fluidized waste oil accumulated on the hearth 12 before the start of the air discharge may be discharged from the discharge pipe 13a to the air supply pipe 13. Once inside, the molten plastic waste cools and solidifies, or the fluidized waste oil returns to a gel-like state, causing pipe clogging. If the pipe is clogged near the end of the air supply pipe 13, there is not much effect. However, if the pipe is clogged upstream of the air supply pipe 13, when the on-off valve 23 is opened later, the pipe clogging point The amount of air discharged from all the discharge pipes 13a existing downstream is reduced, so that the incinerated material immediately above the hearth 12 cannot be completely burned. An object of the present invention is to provide an incineration method and an incinerator capable of reliably burning an incineration object in view of the above-described problems of the related art.

[0010]

In the incineration method according to the first aspect of the present invention, an air supply pipe having a plurality of discharge ports is buried in a hearth of a combustion chamber, and the air supply pipe passes through the hearth. Air can be discharged into the combustion chamber, and air is sent to the air supply pipe from the middle of the burning of the incineration material put into the combustion chamber from the top to the bottom to promote the combustion of the incineration material just above the hearth. In such an incinerator, water is supplied to the air supply pipe before sending air to the air supply pipe, and the water is stored in the air supply pipe. With this, before the supply of air to the air supply pipe buried in the hearth starts, even if molten molten plastic or the like accumulates in the hearth and tries to enter inside from the discharge port of the air supply pipe, the air It is prevented from entering by the water accumulated in the supply pipe, and is cooled by the water in the air supply pipe, the water in the discharge port, or the water discharged from the discharge port, and solidifies. The air supply pipe does not clog the pipe. Therefore, thereafter, when air is sent to the air supply pipe in order to promote the combustion of the incinerated material immediately above the hearth, the air can be discharged from the hearth as much as necessary to completely burn the incinerated material.

In the incineration method according to claim 2 of the present invention, a part or the whole of the hearth is formed of a heat-resistant member having water permeability, and the air supply pipe is embedded in the heat-resistant member. A part of the water supplied before sending air to the air supply pipe is discharged to the water-permeable heat-resistant member. As a result, the fluidized molten plastic or the like accumulated in the hearth solidifies when it touches the heat-resistant member containing water in the hearth, so that the fluid does not approach the air supply pipe, and The tube will not clog the pipe. In addition, the heat-resistant member having water permeability has high air permeability, and when air is sent to the air supply pipe to promote the combustion of the incinerated material immediately above the hearth, the air that has flowed out of the discharge port flows through the hearth. It easily passes and blows out to the combustion chamber,
Sufficient air can be supplied to the incinerator just above the hearth to complete combustion.

[0012] In the incinerator according to claim 3 of the present invention,
The incineration material is charged and burned from top to bottom, and the combustion chamber is buried in the hearth of the combustion chamber, and supplied from the air supply system while the combustion of the incineration material proceeds from top to bottom. An air supply pipe that discharges air from a plurality of outlets into the combustion chamber through the hearth, in the incinerator, water is supplied to the air supply pipe in advance before sending air to the air supply pipe. It is characterized by providing a water supply system for storing it. With this, before starting the supply of air to the air supply pipe buried in the hearth, even if liquid molten plastic or the like accumulates in the hearth and tries to enter inside from the discharge port of the air supply pipe, Water is supplied from the water supply system to the air supply pipe,
By allowing the molten plastic to accumulate in the air supply pipe, the flow of molten plastic, etc., is prevented from entering by the water accumulated in the air supply pipe, and the water or water in the air supply pipe or the discharge port cooled by water is prevented. Since it is cooled by the water that has come out of the discharge port and solidified, it is not put into the air supply pipe, and the air supply pipe does not become clogged. Therefore, thereafter, when air is sent to the air supply pipe in order to promote the combustion of the incinerated material immediately above the hearth, the air can be discharged from the hearth as much as necessary to completely burn the incinerated material.

[0013] In the incinerator according to claim 4 of the present invention,
Part or all of the hearth is formed of a heat-resistant member having water permeability, and the air supply pipe is embedded in the heat-resistant member. Accordingly, if water is supplied from the water supply system to the air supply pipe in advance and stored in the air supply pipe, and part of the water is discharged to the water-permeable heat-resistant member, the furnace Since the fluidized molten plastic or the like accumulated on the floor solidifies when it comes into contact with the heat-resistant member containing water in the hearth, the fluid does not approach the air supply pipe, and the air supply pipe becomes a pipe. There is no clogging. In addition, the air-permeable heat-resistant member has high air permeability, and when air is sent to the air supply pipe to promote the combustion of the incinerated material immediately above the hearth, the air that has come out of the discharge port is
Since the air is easily passed through the hearth and blown out of the hearth into the combustion chamber, sufficient air can be supplied to the incinerated material immediately above the hearth to complete combustion.

In the second and fourth aspects of the present invention, the heat-resistant member having water permeability may be, for example, gravel, sand, gravel, or a mixture of two or more of gravel, sand, and gravel.

[0015]

FIG. 1 is a block diagram of a fixed-bed incinerator showing one embodiment of the present invention, and FIG. 2 is a II-I of FIG.
It is sectional drawing which followed the I 'line. The same components as those in FIG. 3 are denoted by the same reference numerals. Reference numeral 100 denotes a box-shaped furnace body made of a refractory material such as an irregular refractory material (castable) or heat-resistant concrete. The inner bottom of the furnace body 100 is recessed in a slightly narrower area than the combustion chamber 2 to form a recess 101. In the recess 101, a permeable heat resistant member made of a mixture of gravel and sand is placed. 120 are formed. Inside the hearth 120, an air supply pipe 130 is embedded in a Y-shape when viewed in plan (see FIG. 2). The air supply pipe 130 has a large number of discharge ports 130a opened obliquely upward.

The air supply pipe 130 is connected to a fan (not shown) installed outside the furnace body 100 through the blow pipe 18. A water supply pipe 30 to which tap water is supplied is connected downstream of the on-off valve 23 of the blower pipe 18, and an on-off valve 31 is provided in the middle of the water supply pipe 30. A check valve 32 is provided between the water supply pipe 30 and the on-off valve 23 to prevent water from flowing back to the fan side. The other components are configured in exactly the same way as in FIG. 3, and the fans are connected not only to the blower tube 18 but also to blower tubes 14 to 17 connected to the air supply tubes 8 to 11, respectively.

Next, a method of incinerating waste by the above fixed bed incinerator will be described. The on-off valves 19 to 2
It is assumed that all 3 and 31 are closed. (1) Water Supply First, before using the incinerator, the on-off valve 31 is opened for a certain period of time, and water is supplied to the air supply pipe 130 buried in the hearth 120 via the water supply pipe 30 and the blow pipe 18. The water is stored in the air supply pipe 130 and partially discharged from the discharge port 130a, so that the water is soaked into the hearth 120 formed of a heat-resistant member having water permeability. Then, the on-off valve 31 is closed. The water in the air supply pipe 130 and the blower pipe 18 does not leak to the fan due to the presence of the check valve 32.

(2) Injection and ignition of waste Next, the lid 4 is slid in the direction of the arrow A to open the inlet 3, and various wastes are incinerated from the inlet 3 as ceilings of the combustion chamber 2. Put it near (see the dashed-dotted line C in FIG. 1), and light the paper waste and wood waste placed on top. Then, the lid 4 is slid in the direction of arrow B to close the insertion port 3. Then
A fire wraps around the upper end of the incinerated material in contact with air and begins to burn.

(3) Start of air supply from the side wall of the combustion chamber Subsequently, a fan (not shown) is operated to open and close the on-off valve 19, and through the blower pipe 14 and the air supply pipe 8, each discharge pipe 8 a
From the combustion chamber 2 toward the upper end of the incinerated material. As a result, sufficient air is supplied to the upper end of the incineration material, so that it is almost completely burned. Exhaust gas is flue 5
After passing through the cyclone 6 and hitting the wall by swirling to remove soot and dust, it is released from the chimney 7 to the atmosphere.

When the upper end of the incineration material is burning, a portion immediately below the burning portion is heated to a high temperature. Then, as the combustion of the upper end of the incinerated material progresses, the material at the upper end becomes exhausted by the combustion and is discharged to the outside, so that the substance gradually disappears, and the portion immediately heated to a high temperature immediately becomes air. Touch and start burning. With the progress of the combustion of the newly started portion, the lower portion is heated to a high temperature, the newly started portion gradually loses the substance, and the lower portion starts burning by touching air. . Hereinafter, similarly, the incineration material in the combustion chamber gradually decreases in volume while burning from top to bottom.

At the timing when the burned portion of the incinerated material comes close to the discharge pipe 9a, the on-off valve 20 is also opened, and the blower pipe 15,
Air is discharged from each discharge pipe 9a through the air supply pipe 9 toward the burning portion of the incineration object. As a result, the combustion portion of the incineration material is supplied with sufficient air, so that it is almost completely burned. The combustion proceeds, and the burned part of the incineration material is discharged pipe 1
At the timing near 0a, the on-off valve 21 is also opened,
Each of the discharge pipes 10a is provided via the air pipe 16 and the air supply pipe 10.
The air is discharged toward the combustion portion of the incineration material from the air, and further combustion proceeds. At the timing when the combustion portion of the incineration material comes close to the discharge pipe 11a, the on-off valve 22 is also opened, and the blower tube 1 is opened.
7. Air is discharged from each of the discharge pipes 11a through the air supply pipe 11 toward the burning portion of the incineration object. In this way, the combustion portion of the incineration material is always supplied with sufficient air, so that it is almost completely burned.

(4) Melting of plastic waste by combustion heat and fluidization of gel waste oil If plastic waste and gel waste oil are mixed in the incinerated material, the combustion heat is generated during the combustion of the incinerated material. As a result, the temperature becomes high, the former plastic waste is melted, and the latter gel waste oil is fluidized, and the molten plastic and the fluidized waste oil descend inside the incineration material and accumulate on the hearth 120. These fluids attempt to enter the hearth 120 having water permeability, but since the hearth 120 is previously wetted with water, the molten plastic waste and fluidized waste oil are removed from the hearth 120. It touches the water 120 and cools and hardens, and does not reach the air supply pipe 130. Even if molten plastic waste or fluidized waste oil reaches the air supply pipe 130, the water accumulated in the air supply pipe 130 is prevented from entering and the air supply pipe cooled by water. 130, or the outlet 13 of the air supply pipe 130
The molten plastic and the fluidized waste oil which are cooled by the water in Oa are hardened and do not enter the air supply pipe 130, and the air supply pipe 130 does not clog the pipe.

(5) Start of supply of air from the hearth When the burning portion of the incinerated material approaches the hearth 12, the supply of air to the incinerated material decreases, and the incinerated material becomes charcoal called incineration. And try to start remaining. In order to avoid this, at an appropriate timing during which the combustion of the incinerated material has progressed from top to bottom (for example, when the combustion of the incinerated material has progressed by about half of the total, The timing of coming close), opening the on-off valve 23,
8. Air is discharged from each discharge port 130a through the air supply pipe 130 (water collected in the blower pipe 18 and the air supply pipe 130 receives air pressure and immediately flows out of the discharge port 130a. At this time, the check valve 32 prevents the backflow of water to the fan). Gravel forming the hearth 120, a water-permeable heat-resistant member that is a mixture of sand has high air permeability, and the air discharged from the discharge port 130a easily passes through the heat-resistant member, It discharges from the surface of the hearth 120 toward the incineration object immediately above. Therefore, it is possible to supply sufficient air to the incinerated material immediately above the hearth 120 and completely burn it, so that no carbonaceous material remains.

(6) Completion of Combustion When all the incinerated materials have burned, the fan may be stopped and ash may be discharged from the combustion chamber 2.

According to this embodiment, before the supply of air to the air supply pipe 130 buried in the hearth 120 is started,
A hearth made of a heat-resistant member having water permeability by previously sending a predetermined amount of water from the water supply system to the air supply pipe 130 so that water is stored in the air supply pipe 130 and partially discharged from the discharge port 130a. Since the material 120 is moistened, even if liquid molten plastic or the like accumulates on the hearth 120 due to the burning of the incineration material, the molten plastic touches the water of the hearth 120 and cools and solidifies. Does not reach the point. Even if molten plastic waste or fluidized waste oil reaches the air supply pipe 130, the water accumulated in the air supply pipe 130 is prevented from entering and the air supply pipe cooled by water. The molten plastic and fluidized waste oil are not solidified into the air supply pipe 130 by being cooled by 130 or by water in the discharge port 130a of the air supply pipe 130, and the air supply pipe 130 is clogged. Will not occur. Therefore, when the incinerated matter in the combustion chamber 12 is reduced to a certain level or less and air is supplied to the air supply pipe 130 so that carbonaceous matter is not formed on the hearth 120, the air is smoothly discharged from each discharge port 130a. Can be done. The discharged air easily blows out from the surface of the hearth 120 into the combustion chamber 2 because the hearth 120 has high air permeability,
Sufficient air can be provided to the burning incineration just above the hearth 120 to complete combustion.

Although the temperature inside the combustion chamber 2 becomes high due to the combustion of the incineration material, the air supply pipe 130 is cooled by water at the beginning and cooled by air sent from a fan later. Thermal stress is reduced and deterioration is less likely.

As the water-permeable heat-resistant member forming the hearth, a mixture of gravel and sand may be used, or only gravel, only sand, or only gravel slightly larger than the gravel may be used. A mixture of two or more of gravel, sand, and gravels may be used. In addition, a check valve is provided on each of the blower tubes 14 to 17 individually on the downstream side of the on-off valves 19 to 22,
While the on-off valves 19-22 are open, the discharge pipes 8a-
11a, the hot air in the combustion chamber 2 may be prevented from flowing back to the fan side through the ventilation pipes 14 to 17. Similarly, a check valve is provided in the water supply pipe 30 downstream of the on-off valve 31, and the discharge port 130 is opened while the on-off valve 31 is open.
a, The hot air in the combustion chamber 2 may be prevented from flowing back to the water supply via the air supply pipe 130 and the water supply pipe 30.

The water supply to the air supply pipe 130 is performed before the waste is put into the combustion chamber 2, and the supply of the waste to the combustion chamber 2 is completed, and the water is supplied at the same time as ignition. You may make it perform the upper end part of the incineration thing thrown during combustion. It takes some time before the plastic waste melted by the combustion heat or the fluidized waste oil descends to the hearth 120, so that the air supply pipe 130 is generally required before the combustion of the upper half of the incinerated material is completed. Water should be supplied to the water. However, when the liquid waste oil at room temperature is put into the combustion chamber 2 as waste, the liquid waste oil may fall to the hearth 120 before the start of combustion. In this case, if water is supplied to the air supply pipe 130 before the liquid waste oil is charged,
The liquid waste oil is not blocked by water moistened in the hearth 120 or water in the air supply pipe 130, and does not enter the air supply pipe 130. The opening and closing of the on-off valves 19 to 23 and 31 may be manually performed by a worker at a proper timing, or may be automatically performed by timer control. Further, the fan may be a blower having a high wind power.

[0029]

According to the present invention, an air supply pipe provided with a plurality of discharge ports is embedded in a hearth of a combustion chamber, and air can be discharged from the air supply pipe through the hearth into the combustion chamber. In the incinerator, the air is sent to the air supply pipe from the middle of the combustion of the incineration material thrown into the air supply pipe from the top to promote the combustion of the incineration material immediately above the hearth. Before the air is sent, the water is supplied beforehand and stored in the air supply pipe, so that the air is supplied to the hearth before starting the air supply to the air supply pipe buried in the hearth. If the molten plastic or the like accumulates and tries to get inside from the outlet of the air supply pipe, it is prevented from entering by the water accumulated in the air supply pipe, and the air supply pipe or the discharge port cooled by water Is cooled by water or water that comes out of the discharge port and hardens. Without putting the inside of the paper tube, there is no the air supply pipe causes the pipe clogging. Therefore, thereafter, when air is sent to the air supply pipe in order to promote the combustion of the incinerated material immediately above the hearth, the air can be discharged from the hearth as much as necessary to completely burn the incinerated material. This makes it possible to burn off the incineration material at the end of combustion at the end of combustion at a high temperature and burn it off, which helps to prevent the generation of harmful substances such as dioxin.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a fixed-bed incinerator according to one embodiment of the present invention.

FIG. 2 is a horizontal sectional view taken along the line II-II 'in FIG.

FIG. 3 is a configuration diagram of a conventional fixed-bed incinerator.

FIG. 4 is a horizontal sectional view taken along the line IV-IV 'in FIG.

[Explanation of symbols]

 2 combustion chamber 3 inlet 4 lid 5 flue 6 cyclone 7 chimney 8, 9, 10, 11, 130 air supply pipe 8a, 9a, 10a, 11a discharge pipe 14, 15, 16, 17, 18 air pipe 19, 20 , 21, 22, 23, 31 Opening / closing valve 30 Water supply pipe 32 Check valve 100 Furnace body 101 Recess 120 Hearth 130 a Discharge port

Claims (4)

[Claims] An air supply pipe provided with a plurality of discharge ports is embedded in a hearth of a combustion chamber, and air can be discharged from the air supply pipe through the hearth into the combustion chamber. In the incinerator in which air is sent to the air supply pipe from the middle of the combustion progressing from top to bottom to promote the combustion of the incineration object immediately above the hearth, before the air is sent to the air supply pipe Characterized in that water is supplied in advance to the air supply pipe and stored in an air supply pipe. 2. A part or the whole of the hearth is formed of a heat-resistant member having water permeability, the air supply pipe is buried in the refractory material, and supplied before sending air to the air supply pipe. The incineration method according to claim 1, wherein a part of the water is discharged to the water-resistant heat-resistant member. 3. A combustion chamber in which the incinerated material is charged and combustion proceeds from top to bottom, and air is supplied from the middle of the combustion of the incinerated material which is buried in the hearth of the combustion chamber and progresses from top to bottom. An air supply pipe that discharges the air supplied from the system from a plurality of discharge ports through the hearth into the combustion chamber, wherein the air supply pipe is supplied with water in advance before sending air to the air supply pipe. An incinerator characterized by having a water supply system for storing in a supply pipe. 4. The incineration according to claim 3, wherein a part or the whole of the hearth is formed of a heat-resistant member having water permeability, and the air supply pipe is buried in the refractory material. Furnace.