JP3905351B2 - Stoker-type incinerator and incineration method thereby - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a stoker-type incinerator used for incineration of incineration objects such as municipal waste and industrial waste, and an incineration method using the same, and particularly to improve the incineration efficiency of the furnace and reduce the amount of unburned gas. The present invention relates to a stoker-type incinerator and an incineration method therefor.
[0002]
[Prior art]
Conventionally, a stoker type incinerator having a plurality of stoker stages having a wind box below has been widely used as an incinerator for incineration of incineration objects such as municipal waste and industrial waste. This stoker-type incinerator has a drying stoker stage (hereinafter referred to as “drying stage”), a combustion stoker stage (hereinafter referred to as “combustion stage”), and a post-combustion stoker stage (hereinafter referred to as “combustion stage”) that are inclined downward and downward at the bottom of the combustion chamber. , "Post-combustion stage") are arranged in a stepwise fashion in the front-rear direction, a dust supply port is provided at the inlet of the drying stage, an ash outlet is provided at the outlet of the post-combustion stage, and secondary combustion is performed above the combustion chamber A room is provided.
[0003]
In the stoker-type incinerator having this configuration, the incinerated material supplied from the dust supply port is dried and sequentially moved on the stocker stage of the drying stage, the combustion stage and the post-combustion stage in order from the dust supply port. Pyrolysis takes place and further combustion occurs. The incinerator supplied to the front part of the drying stage from the dust supply port is dried by the primary air from below and the radiant heat in the furnace in the drying stage. In particular, since municipal waste contains about 50% of moisture, the moisture is evaporated and a part of the pyrolysis is also performed in this drying stage. Thereafter, the combustion stage ignites the dust by the supplied primary air, and burns volatile components and fixed carbon components. The post-combustion stage burns unburned components (mainly fixed carbon components) that have passed without being burned until they completely become ash. The pyrolysis gas generated in the combustion chamber is mixed with the secondary air to reach the secondary combustion chamber where it is burned.
[0004]
A wind box is provided below each stocker stage, and outside air is introduced into the wind box using a blower or the like, for the purpose of cooling the grate or combustion air of the incinerated materials. Primary air is supplied from the grate of each stoker stage. This primary air is introduced into each wind box of each stoker stage from a common blower. In addition, outside air is also supplied to the secondary combustion chamber as secondary air for the purpose of burning unburned gas that could not be combusted in the main combustion chamber.
[0005]
In recent years, it has become indispensable to improve the efficiency of incinerators and reduce the environmental burden. In particular, it is an urgent task to reduce the amount of exhaust gas such as unburned gas and harmful gas. In order to suppress such pollutants such as dioxin, it is necessary to reduce the unburned content of the combustion gas. For this purpose, the temperature inside the furnace must be raised and the amount of introduced air can be reduced. desirable.
[0006]
As a method for increasing the temperature in the furnace and reducing the amount of exhaust gas, for example, supplying oxygen or oxygen-enriched air as primary air or secondary air to promote oxidation is known. As this example, JP-A-3-244913 can be cited. This uses high-concentration oxygen and / or ozone as all or part of primary air and secondary air, detects the exhaust gas temperature and the amount of flue gas in the secondary combustion chamber, and supplies this high-concentration oxygen and / or ozone. By adjusting the amount, the combustion exhaust gas in the secondary combustion chamber is controlled to a high temperature.
[0007]
[Problems to be solved by the invention]
However, the incinerated product supplied from the garbage supply port is not necessarily laminated uniformly in the width direction orthogonal to the moving direction of the incinerated material. It has the highest mountain distribution. For this reason, even if primary air is supplied from the grate, where the stack height of the incinerator is high, the air flow resistance is large, so that it is difficult for air to flow in, and conversely the stack height near the end in the width direction. When the temperature is low, there is a phenomenon that air easily flows in because the air flow resistance is small. As a result, the incinerator near the center in the width direction is likely to be incompletely combusted, and further, primary air that does not contribute to combustion is likely to flow in from near the end in the width direction. Therefore, unburned gas due to incomplete combustion is likely to be generated, and it is difficult to reduce the amount of introduced air by raising the temperature in the furnace, and further, a vicious cycle is caused for the generation of unburned gas.
In such a case, even if oxygen or oxygen-enriched air is supplied as primary air as in the above-mentioned Japanese Patent Application Laid-Open No. 3-244913 etc., primary air hardly flows at a place where the stacking height of the incineration object is high. Since a large amount of primary air flows into a place where the stacking height is low, it can be said that it is insufficient for suppressing the generation of unburned gas.
[0008]
The present invention has been made in view of the above circumstances, and can reduce the amount of air introduced and increase the temperature inside the furnace, improve the incineration efficiency of the furnace, and reduce the unburned content of the combustion gas. The present invention provides a stoker-type incinerator and an incineration method using the same to reduce the environmental load.
[0009]
[Means for Solving the Problems]
A stoker-type incinerator according to a first aspect of the present invention for solving the above-mentioned problems sequentially incinerators supplied from a dust supply port into a combustion chamber on a plurality of stoker stages having a wind box below in the combustion chamber. In a stoker-type incinerator that performs drying and pyrolysis while being moved, and further burns, a wind box positioned below at least one of the plurality of stoker stages is orthogonal to the moving direction of the incinerated object. Divided into three or more in the width direction and arranged in parallel in the moving direction, the oxygen partial pressure of the air supplied to each of the divided wind boxes is changed, the width direction center It has an air supply control part which adjusts so that the oxygen partial pressure of the wind box located in may become higher than the oxygen partial pressure of the wind box located in both ends.
[0010]
According to this configuration, since the wind box is divided into three or more in the width direction, the air supply amount is changed between the wind box located at the center in the width direction and the wind boxes located at both ends in the width direction. Therefore, it is possible to set the air supply amount according to the stacking height of the incinerated objects. That is, it is possible to supply a large amount of air to a place where the stacking height is high, and conversely, it is possible to prevent supplying air more than necessary to a place where the stacking height is low. This makes it difficult to cause incomplete combustion of the incinerated products stacked near the center in the width direction, and further reduces the inflow of air that does not contribute to combustion from both ends in the width direction.
Further, by changing the oxygen partial pressure for each divided wind box and adjusting the oxygen partial pressure of the central wind box to be higher than both ends in the width direction, It is possible to supply air having a high oxygen partial pressure to a high area. That is, since the air flow resistance is large, oxygen having a high oxygen partial pressure is supplied to the portion where inflow of air is difficult to occur due to high air flow resistance. Therefore, efficient incineration can be realized, and the amount of air introduced can be reduced.
Therefore, it is possible to reduce the amount of air introduced and increase the temperature inside the furnace, improve the incineration efficiency of the furnace, reduce the unburned portion of the combustion gas, and reduce the environmental burden. Can be obtained.
[0011]
The stoker-type incinerator according to the second invention is the stoker-type incinerator according to the first invention , wherein each of the divided wind boxes is provided with pressure measuring means, and based on this pressure measurement value, The air supply control unit adjusts the supply amount of oxygen or oxygen-enriched air supplied to each wind box.
[0012]
According to this configuration, it is possible to appropriately adjust the supply amount of oxygen or oxygen-enriched air according to the state of the incinerators stacked on each wind box. That is, since the air flow resistance is different depending on the stacking height of the incinerators, the pressure loss state of the air passing through each wind box is different. By grasping the pressure loss state, it is possible to determine the stacking state of the incinerated objects for each wind box and adjust the supply amount of oxygen or oxygen-enriched air accordingly. Therefore, an appropriate incineration can be realized by setting an appropriate air supply amount and oxygen partial pressure in accordance with the stack height of the incineration object that changes from time to time. Since the supply amount of oxygen or oxygen-enriched air is adjusted for each wind box, the oxygen partial pressure for each wind box can be easily adjusted.
[0013]
According to a third aspect of the present invention, there is provided an incineration method using a stoker-type incinerator that sequentially moves an incinerator supplied from a dust supply port into a combustion chamber on a plurality of stoker stages having a wind box below in the combustion chamber. In a method of incineration using a stoker type incinerator that performs drying and pyrolysis while further burning, and in at least one of the plurality of stoker stages, a plurality of in the width direction perpendicular to the moving direction of the incinerated object A step of supplying oxygen or oxygen-enriched air from different supply systems, and adjusting so that a larger amount of oxygen or oxygen-enriched air is supplied to the supply system leading to the center in the width direction than at both ends in the width direction.
[0014]
According to this configuration, since oxygen or oxygen-enriched air is supplied more in the center than at both ends in the width direction, it is possible to supply air having a high oxygen partial pressure to a place where the stacking height of the incinerated objects is high. As a result, it becomes difficult to cause incomplete combustion of the incinerated products stacked in the vicinity of the center in the width direction, and it is possible to reduce the amount of air introduced and improve the incineration efficiency of the furnace. Therefore, it is possible to provide an incineration method using a stoker-type incinerator that reduces the unburned content of the combustion gas and reduces the environmental load.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a view schematically showing a cross section of the entire stoker-type incinerator 1 in order to explain the stoker-type incinerator 1 according to the present invention.
In FIG. 1, the stoker type incinerator 1 is provided with a dust supply port 2 and a pusher type dust transport machine 3, followed by a main combustion chamber 7, and a secondary combustion chamber 8 is provided above the main combustion chamber 7. The configuration continues to an exhaust pipe (not shown). The garbage supply port 2 is an open type, and the transportation speed can be controlled by the subsequent garbage transporter 3.
[0016]
The main combustion chamber 7 is installed in a staircase shape with the stocker stages 4, 5, 6 extending downwardly in order from the dust supply port 2. Each stocker stage 4, 5, 6 is composed of a total of three stages, a drying stage 4, a combustion stage 5 and a post-combustion stage 6, in order from the side closest to the dust supply port 2. The incinerated material supplied to the front end of each is sequentially transported to the drying stage 4, the combustion stage 5 and the post-combustion stage 6.
[0017]
The upper surface wall 9 of the main combustion chamber 7 connected to the secondary combustion chamber 8 is directed upward toward the secondary combustion chamber 8 so that the generated pyrolysis gas is guided to the secondary combustion chamber 8 and easily burns. The main combustion chamber 7 is inclined and covers the main combustion chamber 7. A secondary air inlet 10 for supplying secondary air toward the main combustion chamber 7 is provided at the inlet of the secondary combustion chamber 8. From this, secondary air supplied by a blower (not shown) or the like completely burns unburned components contained in the combustion gas generated by the combustion in the combustion stage 5 and the post-combustion stage 6 and then exhausts it from an exhaust pipe (not shown). .
[0018]
FIG. 2 is a schematic diagram showing an enlarged portion of each stoker stage of the stoker-type incinerator 1. In FIGS. 1 and 2, a drying stage 4, a combustion stage 5, and a post-combustion stage 6 installed in the main combustion chamber 7. All have wind boxes 4a, 5a, 6a below them, from which primary air is supplied by a blower (not shown). Each stocker stage 4, 5, 6 has a grate 11, 12, 13 respectively. In each of these stalker stages, primary air is supplied to the incinerator through the grate 11, 12, 13 as indicated by arrows in the figure. The drying stage 4 and the combustion stage 5 are greatly down-tilted in order to smoothly transport the incineration object, and the final post-combustion stage 6 is substantially horizontal and stepped with respect to the previous stoker stage. It is connected to. The grate 11, 12, 13 is provided with a movable grate and a fixed grate (not shown) alternately, and is supplied from the dust supply port 2 by reciprocating the movable grate in the front-rear direction. The incinerated material to be incinerated can be sequentially transported rearward on the drying stage 4, the combustion stage 5 and the post-combustion stage 6. The feed speed of the incinerated object by each of the stocker stages 4, 5, and 6 can be arbitrarily controlled by the longitudinal movement speed of the movable grate. Further, a conveyor 15 is connected under each wind box 4a, 5a, 6a.
[0019]
Here, the structure of the stoker stage which is the main part according to the embodiment of the present invention and the primary air supply mechanism to each wind box will be described in detail.
In FIG. 2, FIG. 3 shows the cross section (AA ′ line cross section) of the combustion stage 5 in the width direction orthogonal to the moving direction of the incinerated object. In this figure, the wind box 5a is divided | segmented into three with respect to the width direction orthogonal to the moving direction of the to-be-incinerated object 16 laminated | stacked on the upper surface of the grate 12, These divided wind boxes 21, 22, and 23 are divided | segmented. The incineration object 16 is arranged in parallel with the moving direction. And the incinerated object 16 is laminated | stacked so that it may become the distribution of the mountain shape with a lamination | stacking height becoming high near the center of the width direction, with the state supplied to the drying stage 4 from the refuse supply port 2. FIG.
[0020]
Primary air supply systems 24, 25, and 26 are connected to the divided air boxes 21, 22, and 23, respectively. Each primary air supply system 24, 25, 26 is connected to an air supply pipe and an oxygen supply pipe. The air supply pipe supplies air heated to a predetermined temperature by an external heating device (not shown), and the oxygen supply pipe is oxygen or oxygen-enriched air from an external supply device (not shown). Supply. The primary air supply system 24 includes an air supply pipe 24a and an oxygen supply pipe 24b, the primary air supply system 25 includes an air supply pipe 25a and an oxygen supply pipe 25b, and the primary air supply system 26 includes an air supply pipe 26a. And the oxygen supply pipe 26b are connected to each other. Air control valves 24c, 25c and 26c are attached to the air supply pipes 24a, 25a and 26a, respectively, and oxygen control valves 24d, 25d and 26d are attached to the oxygen supply pipes 24b, 25b and 26b, respectively. ing. The air supply amount to each primary air supply system 24 to 26 can be adjusted by each air control valve 24c to 26c, and oxygen to each primary air supply system 24 to 26 can be adjusted by each oxygen control valve 24d to 26d. The supply amount of oxygen-enriched air can be adjusted.
[0021]
Each of these control valves 24c to 26c and 24d to 26d is a remote control valve, and is connected to the air supply control unit 27 so that a valve opening degree command is given thereto.
Further, pressure measuring means 28, 29, 30 are provided in each of the divided wind boxes 21, 22, 23. The pressure measurement values in these pressure measuring means 28 to 30 are transmitted to the air supply control unit 27.
Therefore, the air supply control unit 27 can change the valve opening commands of the control valves 24c to 26a and 24d to 26d based on the pressure measurement results in the divided wind boxes 21 to 23.
[0022]
By having the primary air supply mechanism described above, the amount of air supplied from the air supply pipes 24a to 26a and the amount of oxygen or oxygen-enriched air supplied from the oxygen supply pipes 24b to 26b are appropriately changed. It becomes possible to change the oxygen partial pressure of the primary air supplied for each of the divided wind boxes 21 to 23.
[0023]
Next, the incineration process of the incinerated object by the stoker type incinerator 1 having the above-described structure will be described below. First, in FIG. 1, incinerated objects such as municipal waste are supplied onto a drying stage 4 so as to be pushed out by a waste transporter 3 through a waste supply port 2. On the drying stage 4, moisture in the incinerated material evaporates, and ignition is promoted, and partial thermal decomposition is performed. In this drying process, drying is promoted mainly by two types of heat transfer. One is due to the primary air supplied from the wind box 4a through the grate 11. As described above, the primary air contains air heated to a predetermined temperature by an external heating device (not shown). The primary air is dried from the drying stage 4 through the incinerated material to the main combustion chamber 7. The other is due to radiant heat radiated from the heated upper surface wall 9 to the surface layer of the incinerated object moving through the drying stage 4.
[0024]
The incinerated product that has undergone the drying process is moved to the combustion stage 5. Here, the primary air supplied from the wind box 5a through the grate 12 ignites, and the volatile component and the fixed carbon component are combusted (see FIGS. 1 and 2). At this time, as shown in FIG. 3, the stacking height of the incineration object 16 is higher in the vicinity of the center in the width direction, so that the air flow resistance is large and the air hardly flows. On the contrary, in the vicinity of the end in the width direction where the stacking height is low, the air flow resistance is small, so that air easily flows in. However, as described above, the wind box 5a has the divided wind boxes 21 to 23 arranged in parallel in the width direction, and the primary air is individually supplied by the air supply systems 24 to 26 connected thereto. Since it is possible to supply, it is possible to change the primary air supply condition between the wind box located at the center in the width direction and the wind box located at both ends in the width direction, and set it according to the stacking height of the incinerated objects it can.
[0025]
The supply condition of the primary air supplied to each of the divided wind boxes 21 to 23 is set by the air supply control unit 27. The air supply control unit 27 gives valve opening commands to the control valves 24c to 26c and 24d to 26d. At this time, the oxygen partial pressure of the primary air supplied to the divided wind box 22 located in the center in the width direction is given. Each valve opening command is given so that it becomes higher than the oxygen partial pressure of the primary air supplied to the divided wind boxes 21 and 23 located at both ends. These oxygen partial pressures are determined by the supply amount from the air supply pipe and the oxygen supply pipe connected to each primary air supply system, that is, the supply amount of oxygen or oxygen-enriched air. That is, it is determined by the valve opening of each air control valve and each oxygen control valve. By appropriately setting these valve openings, air having a higher oxygen partial pressure can be supplied as the stacking height of the incineration object 16 is higher. That is, since the air flow resistance is large, oxygen having a high oxygen partial pressure is supplied to the portion where inflow of air is difficult to occur due to high air flow resistance. Efficient incineration can be achieved and the amount of air introduced can be reduced.
[0026]
As the primary air supply amount for each divided wind box, the supply amount to the central divided wind box 22 is set to be larger than the divided wind boxes 21 and 23 at both ends, so that A large amount is supplied to the central portion in the width direction where the stacking height is high, and a small amount is supplied to both end portions where the stacking height is low. As a result, more air can be supplied at higher stacking heights, and conversely, air can be prevented from being supplied more than necessary at lower stacking heights. Inflow of non-contributing air can be reduced.
[0027]
The air supply control unit 27 transmits the pressure measurement result in each divided wind box, and grasps the pressure loss state of the air passing through each wind box by comparing with the supply pressure in each primary air supply system. To be done. That is, when the stacking height is low, the pressure loss in the incineration object 16 is small, and the air supplied from the primary air supply system easily diffuses into the combustion chamber 7 through the incineration object 16. Go. However, when the stacking height is high, the pressure loss in the incineration object 16 is large, so that the inside of the wind box is kept at a high pressure by the primary air supplied. Therefore, by grasping the pressure state as described above, it is possible to determine the stacked state of the incinerated object 16 for each divided wind box. The air supply control unit 27 adjusts the supply amount of oxygen or oxygen-enriched air based on the determination result, so that an appropriate air supply amount is obtained according to the stack height of the incineration object that changes at any time. And it can set to oxygen partial pressure and can implement | achieve efficient incineration.
[0028]
After passing through the combustion stroke described above, in the post-combustion stage 6, combustion is performed until the unburned portion that has passed without being burned completely becomes ash. Further, the pyrolysis gas generated in the combustion chamber 7 is mixed with the secondary air to reach the secondary combustion chamber 8 where it is burned (see FIG. 1).
[0029]
The above is the incineration process of the incineration object by the stoker type incinerator 1 according to the present embodiment. According to this, the incineration efficiency of the furnace is improved, the unburned portion of the combustion gas is reduced, and the environmental load is reduced. It is possible to provide a stoker-type incinerator that can be reduced.
In addition, description of said Example of embodiment serves as description of embodiment of the incineration method by the stoker type incinerator concerning this invention.
[0030]
Further, the embodiment is not limited to the above, and for example, the embodiment may be modified as follows.
(1) In the present embodiment, the number of divided wind boxes in the combustion stage is three, but this need not be the case, and it can be further increased to four or more to increase the width direction. It is possible to finely adjust the oxygen partial pressure and the like. Also, the drying stage and the post-combustion stage may have the same split air box and primary air supply mechanism as the combustion stage.
[0031]
(2) In this embodiment, the primary air supply system is described as being supplied with both oxygen or oxygen-enriched air and normal air. The supply may be stopped and only oxygen may be supplied.
[0032]
(3) In FIGS. 1 and 2, the stoker type incinerator has been described in which the stoker steps are stepped down step by step, but even if the stoker steps are horizontally arranged, The apparatus and method of the invention can be applied.
[0033]
(4) In FIG. 1 and FIG. 2, a plurality of, for example, two wind boxes may be arranged in series in each stalker stage wind box in the moving direction of the incinerated object. The apparatus and method of the present invention can also be applied to a stoker-type incinerator of the type in which the combustion stage 5 and the post-combustion stage 6 are integrated.
[0034]
【The invention's effect】
According to the first aspect of the invention, since the wind box is divided into three or more in the width direction, the amount of air supplied is reduced between the wind box located at the center in the width direction and the wind boxes located at both ends in the width direction. It is possible to change and set the air supply amount according to the stack height of the incineration object. That is, it is possible to supply a large amount of air to a place where the stacking height is high, and conversely, it is possible to prevent supplying air more than necessary to a place where the stacking height is low. This makes it difficult to cause incomplete combustion of the incinerated products stacked near the center in the width direction, and further reduces the inflow of air that does not contribute to combustion from both ends in the width direction.
Further, by changing the oxygen partial pressure for each divided wind box and adjusting the oxygen partial pressure of the central wind box to be higher than both ends in the width direction, It is possible to supply air having a high oxygen partial pressure to a high area. That is, since the air flow resistance is large, oxygen having a high oxygen partial pressure is supplied to the portion where inflow of air is difficult to occur due to high air flow resistance. Therefore, efficient incineration can be realized, and the amount of air introduced can be reduced. Therefore, it is possible to reduce the amount of air introduced and increase the temperature inside the furnace, improve the incineration efficiency of the furnace, reduce the unburned portion of the combustion gas, and reduce the environmental burden. Can be obtained.
[0035]
According to the second invention, it is possible to appropriately adjust the supply amount of oxygen or oxygen-enriched air in accordance with the state of the incinerators stacked on each wind box. That is, since the air flow resistance is different depending on the stacking height of the incinerators, the pressure loss state of the air passing through each wind box is different. By grasping the pressure loss state, it is possible to determine the stacking state of the incinerated objects for each wind box and adjust the supply amount of oxygen or oxygen-enriched air accordingly. Therefore, an appropriate incineration can be realized by setting an appropriate air supply amount and oxygen partial pressure in accordance with the stack height of the incineration object that changes from time to time. Since the supply amount of oxygen or oxygen-enriched air is adjusted for each wind box, the oxygen partial pressure for each wind box can be easily adjusted.
[0036]
According to the third invention, since oxygen or oxygen-enriched air is supplied more in the center than at both ends in the width direction, air having a high oxygen partial pressure can be supplied to a place where the stacking height of the incinerator is high. . As a result, it becomes difficult to cause incomplete combustion of the incinerated products stacked in the vicinity of the center in the width direction, and it is possible to reduce the amount of air introduced and improve the incineration efficiency of the furnace. Therefore, it is possible to provide an incineration method using a stoker-type incinerator that reduces the unburned content of the combustion gas and reduces the environmental load.
[Brief description of the drawings]
FIG. 1 is a diagram schematically showing a cross section of a side surface of a stoker-type incinerator according to the present invention.
FIG. 2 is a diagram schematically showing a stoker stage in the stoker type incinerator according to the present invention.
3 is a cross-sectional view taken along line AA ′ in FIG. 2;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Stoker type incinerator 2 Garbage supply port 4 Drying stage 5 Combustion stage 6 Post combustion stage 4a, 5a, 6a Wind box 7 Main combustion chamber 16 Incinerators 21, 22, 23 Split wind boxes 24, 25, 26 Primary air supply Systems 24a, 25a, 26a Air supply pipes 24b, 25b, 26b Oxygen supply pipes 24c, 25c, 26c Air control valves 24d, 25d, 26d Oxygen control valves 27 Air supply control units 28, 29, 30 Pressure measuring means

Claims (3)

A stoker-type incinerator that incinerates the waste to be supplied into the combustion chamber from the garbage supply port while drying and thermally decomposing it while sequentially moving it over a plurality of stoker stages having a wind box below in the combustion chamber. In
The wind box located below at least one of the plurality of stalker stages is divided into three or more in the width direction orthogonal to the moving direction of the incinerated object, and is parallel to the moving direction. Are arranged so that
An air supply pipe for supplying normal air to each of the divided wind boxes;
An air control valve attached to the air supply pipe;
An oxygen supply pipe for supplying oxygen or oxygen-enriched air to each of the divided wind boxes;
An oxygen control valve attached to the oxygen supply pipe;
With
By changing the oxygen partial pressure of the air supplied to each of the divided wind boxes, so that the oxygen partial pressure of the wind box located in the center in the width direction is higher than the oxygen partial pressure of the wind box located at both ends , have a air supply control unit for adjusting the the opening of the air control valve and the opening degree of the oxygen control valve,
Each of the divided wind boxes is provided with pressure measuring means, and based on the measured pressure value, the air supply control unit is usually supplied to the wind boxes from the air supply pipe. A stoker-type incinerator characterized by adjusting an air supply amount and an oxygen or oxygen-enriched air supply amount supplied from the oxygen supply pipe. The air supply control unit is configured to supply normal air supplied from the air supply pipe based on a result of comparing a pressure measurement value by the pressure measuring unit and a supply pressure in a supply system to each of the divided wind boxes. The stoker-type incinerator according to claim 1, wherein the supply amount of oxygen and the supply amount of oxygen or oxygen-enriched air supplied from the oxygen supply pipe are adjusted. A stoker-type incinerator that incinerates the waste to be supplied into the combustion chamber from the garbage supply port while drying and thermally decomposing it while sequentially moving it over a plurality of stoker stages having a wind box below in the combustion chamber. In the incineration method according to claim 1, in at least one of the plurality of stoker stages, from a plurality of different supply systems in the width direction orthogonal to the moving direction of the incinerated object , normal air supply amount, oxygen Or the supply amount of oxygen-enriched air, and the step of supplying mixed air that has been mixed respectively, and both ends in the width direction based on pressure measurement values by pressure measurement means provided in the wind box adjustment incineration method according stoker incinerator, which comprises to feed subjecting high the mixed air of the oxygen partial pressure in the supply line leading to the widthwise center than.

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