JP2002364824A - Stoker type incinerator and method of treating incinerated ash - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stoker type incinerator very excellent in view of energy efficiency, wherein incinerated ash can be treated up to the state where its reuse is possible, in the incineration process in itself, and a method of disposing of the incinerated ash thereby. SOLUTION: This disposal method for incinerated ash by the stoker type incinerator 1, which performs the drying and thermal decomposition of the matter to be incinerated, supplied into a combustion chamber from a garbage supply port 2, in the combustion chamber while shifting it in order on a plurality of stoker stages having wind boxes and further combusts it, has a incineration process of further heat-treating the incinerated ash to 1000 deg.C or over by staying the incinerated ash combusted at the rear combustion stage 6 being the stoker stage for performing the final combustion out of the above stoker stages temporarily downstream of that rear combustion stage and combusting the unburnt components within the incinerated ash while supplying air to the incinerated ash in staying.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stoker-type incinerator used for incineration of incinerated materials such as municipal garbage and industrial waste, and a method for treating incinerated ash therewith. The present invention relates to a stoker-type incinerator for processing as much as possible and a method for treating incineration ash therewith.

[0002]

2. Description of the Related Art In general, a stoker type incinerator having a plurality of stoker stages having a wind box below is widely used as an incinerator for incinerating incinerated materials such as municipal waste and industrial waste. I have. This stoker-type incinerator has a drying stoker stage (hereinafter, referred to as a "drying stage"), a combustion stoker stage (hereinafter, referred to as a "combustion stage"), and a post-combustion stoker stage (hereinafter, referred to as "combustion stage") that are inclined downward and downward at the bottom of a combustion chamber. , Referred to as “post-combustion stage”) in tandem in the front-rear direction, providing a trash supply port at the entrance of the drying stage, and an ash outlet at the exit of the post-combustion stage,
A secondary combustion chamber is provided above the combustion chamber.

In the stoker type incinerator of this configuration, the incineration material supplied from the refuse supply port moves sequentially from the refuse supply port on each of the drying, combustion and post-combustion stoker stages. , Drying and pyrolysis and further burning. The incineration material supplied from the dust supply port to the front of the drying stage is dried in the drying stage by primary air from below and radiant heat in the furnace. In particular, since urban garbage contains about 50% of water, the water is evaporated, and at the same time, part of the thermal decomposition is also performed in this drying stage. After that, the combustion stage
The garbage is ignited by the supplied primary air to burn volatiles and fixed carbon. The post-combustion stage burns unburned components (mainly fixed carbon components) that have passed without being burned until they completely become ash. Further, 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 of the storage stages, and outside air is introduced into the wind box using a blower or the like to cool a grate or to burn air for burning incineration materials. For the purpose, primary air is supplied from the grate of each stoker stage. This primary air is introduced from a common blower into each wind box in each stoker stage. Outside air is also supplied to the secondary combustion chamber as secondary air for the purpose of burning unburned gas that could not be burned in the main combustion chamber.

[0005] In the stoker type incinerator, municipal waste and industrial waste are incinerated as described above. The ash after incineration is roughly divided into "main ash" discharged from the downstream of the incinerator and "dust ash" coming out of the dust collector. Dust ash is specially controlled waste, which is processed by melting, cement solidification, chemical treatment, and other methods, and sent to a specially controlled disposal site. On the other hand, the main ash, which is currently landfilled, is being reduced in volume due to melting or the like and is being reused as roadbed material. In order to reuse the main ash, it is necessary to meet the standards for dissolution tests of heavy metals and other substances in accordance with the soil standards (Notification No. 46 of the Environment Agency). Therefore, a typical method for making the main ash reusable is a plasma melting technique.

[0006]

However, plasma melting of main ash requires a large amount of electric power of 1 MW per ton of main ash. Recently, the number of waste power generation facilities has been increasing, but if the main ash is reused by such plasma melting, most of the obtained electric power will be consumed, which is preferable in terms of energy efficiency. Instead, a radical solution is desired.

[0007] The present invention has been made in view of the above circumstances, and in the incineration process in a stoker type incinerator, it is possible to treat incineration ash to a state where it can be reused. It is an object of the present invention to provide a stoker-type incinerator and a method for treating incineration ash by using the stoker-type incinerator, which is very efficient.

[0008]

According to a first aspect of the present invention, there is provided a method for treating incineration ash by a stoker-type incinerator, comprising the steps of:
A method for treating incineration ash by a stoker-type incinerator that performs drying and pyrolysis while sequentially moving over a plurality of stoker stages having a wind box in a combustion chamber, and further burns the stoker stages. Of these, the incinerated ash burned in the post-combustion stage, which is the stoker stage for final combustion, is temporarily retained downstream of the post-combustion stage, and air is supplied to the retained incinerated ash while the remaining incinerated ash remains in the incinerated ash. It is characterized by having a sintering step of heating the incinerated ash to 1000 ° C. or more by burning the fuel.

According to this configuration, in the incineration process in the stoker type incinerator, the incineration ash can be sintered, the dissolution stability of heavy metals and the like can be enhanced, and the incineration ash can be processed to a state where it can be reused. Thus, it is possible to obtain a method for treating incineration ash of a stoker-type incinerator which is very excellent in terms of energy efficiency.

[0010] A stoker-type incinerator that performs reburning downstream of the post-combustion stage is disclosed in Japanese Patent Application Laid-Open No. H11-22947. This is for the purpose of decomposing dioxins contained in the incineration ash, and performs reburning only at 700 to 1000 ° C. Therefore, problems to be solved are different, and specific means are different from those of the present invention.

According to a second aspect of the present invention, there is provided a method for treating incineration ash by a stoker type incinerator, wherein the stoker type incinerator detects a burn-out position in a post-combustion stage.
Or, detecting the temperature of the incinerated ash during the sintering, based on the detection result, the conveying speed of the incinerated material in each stoker stage or the amount of air introduced into each wind box per unit time, or the incinerated ash It is characterized in that the amount of air introduced per unit time to be supplied to the air is controlled.

According to this configuration, by controlling the burn-off position, it is possible to secure an unburned portion necessary for sintering. Further, by controlling the amount of air introduced per unit time supplied to the incinerated ash, it is possible to surely raise the temperature to a temperature range necessary for sintering. Therefore, the incineration ash can be treated to a state where it can be reused without fail.

In the stoker-type incinerator according to the third aspect, the incineration material supplied into the combustion chamber from the refuse supply port is sequentially moved in the combustion chamber over a plurality of stoker stages having a wind box below. A stoker-type incinerator that performs drying and thermal decomposition while further burning, and in which the incinerated ash burned in the post-combustion stage, which is the stoker stage that performs the final combustion among the stoker stages, can be temporarily retained. The incineration while supplying air to the stagnated incineration ash, comprising a conveyor that can be moved and installed downstream of the post-combustion stage, and an air supply unit that ventilates the stagnated incineration ash. By burning unburned components in the ash, a sintering section for further heating the incinerated ash to 1000 ° C. or higher is connected to the post-combustion stage.

According to this configuration, in the incineration process in the stoker-type incinerator, the incineration ash is sintered, the elution stability of heavy metals and the like is increased, and the stoker-type incineration can be processed to a state where it can be reused. It is possible to obtain a furnace, and to realize incineration ash treatment of a stoker-type incinerator which is extremely excellent in terms of energy efficiency.

A stoker-type incinerator according to a fourth aspect of the present invention is characterized in that, in the third aspect, a burner is provided at a lower portion of the conveyor for promoting the ignition of unburned components in the accumulated incineration ash.

According to this configuration, ignition can be reliably performed in the lower layer at a lower temperature than in the upper layer of the incinerated ash.

In the stoker-type incinerator according to the fifth aspect, the incineration material supplied into the combustion chamber from the dust supply port is sequentially moved in the combustion chamber over a plurality of stoker stages having a wind box below. A stoker type incinerator that performs drying and thermal decomposition while further burning, and can temporarily store incinerated ash burned in a post-combustion stage that is a stoker stage that performs final combustion among the stoker stages. An ash pot that is installed downstream of the post-combustion stage and has a grate bottom that can be opened and closed, and an air supply unit that ventilates the stored incineration ash, and supplies air to the storage incineration ash. By burning the unburned components in the incineration ash while supplying, the incineration ash is further cooled to 1000 ° C.
The sintering section to be subjected to the heat treatment is connected to the post-combustion stage.

According to this configuration, in the incineration process in the stoker-type incinerator, the incineration ash is sintered, the dissolution stability of heavy metals and the like is increased, and the stoker-type incineration can be processed to a state where it can be reused. It is possible to obtain a furnace, and to realize incineration ash treatment of a stoker-type incinerator which is extremely excellent in terms of energy efficiency.

A stoker-type incinerator according to a sixth aspect is characterized in that, in the fifth aspect, a screen capable of removing excessive incombustibles is provided on an upper surface of the ash pot.

According to this configuration, it is possible to prevent excessive incombustible substances from being mixed into the incineration ash, so that factors that hinder sintering are removed, sintering is facilitated, and a sintered product having high purity is efficiently obtained. be able to.

A stoker-type incinerator according to a seventh aspect of the present invention is the stoker-type incinerator according to the fifth or sixth aspect, wherein a burner for igniting unburned components in the stored incineration ash is provided below the bottom of the ash pot. And

According to this configuration, ignition can be reliably performed even in the lower layer at a lower temperature than in the upper layer of the stored incineration ash.

[0023] The stoker-type incinerator according to claim 8 is characterized in that in any of claims 5 to 7, the ash pot has a bottom bedding made of incombustible material at the inner bottom.

According to this configuration, the grate bottom is protected,
The life of the ash pot can be extended.

[0025]

Embodiments of the present invention will be described below with reference to 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. In FIG. 1, a stoker-type incinerator 1 is provided with a refuse supply port 2 and a pusher-type refuse transporter 3, followed by a main combustion chamber 7, and a secondary combustion chamber 8 provided above the main combustion chamber 7. , To the exhaust pipe 9. The garbage supply port 2 is an open type, and the transport speed can be controlled by the garbage transport machine 3 that follows.

The main combustion chamber 7 is provided in a stair-like manner in which the stocker stages 4, 5, and 6 extend downward and incline in order from the dust supply port 2. Each of the storage means 4, 5, and 6 comprises a drying stage 4, a combustion stage 5, and a post-combustion stage 6 in total, starting from the one closest to the dust supply port 2. The incineration material supplied to the front end is transported to the drying stage 4, the combustion stage 5, and the post-combustion stage 6 sequentially. Downstream of the post-combustion stage 6, a sintering section having a sintering conveyor 10 to which incineration ash is further conveyed is provided.

Each of the drying stage 4, the combustion stage 5, the post-combustion stage 6, and the sintering conveyor 10 installed in the main combustion chamber 7 has wind boxes 4a, 5a, 6a, 10a below it. , Primary air is supplied through an air supply unit. Each of the storage stages 4, 5, and 6 is provided with a movable grate (not shown) and a fixed grate alternately, and reciprocates in the front-rear direction by a driving device 11 schematically showing the movable grate. By being driven, the incineration material supplied from the dust supply port 2 is stirred while the drying stage 4
The combustion stage 5 and the post-combustion stage 6 can be sequentially transported backward. The transport speed of the incinerated material in each of the storage stages 4, 5, and 6 is determined by the control unit 12, and can be arbitrarily controlled based on the forward / backward moving speed command of the movable grate transmitted to the driving device 11. It has become. Further, a falling ash conveyor 14 is connected below the wind boxes 4a, 5a, and 6a.

The sintering section comprises a sintering conveyor 10, an air supply section 10b and a wind box 10a. The sintering section conveys the incinerated ash conveyed from the post-combustion stage 6 so as to be able to stay therein and sinters the incinerated ash. Is what you do. The conveyor rotation speed command, which is the conveying speed in the sintering section, is determined by the control section 12 in the same manner as in the stoker stage, and the sintering conveyor 1
0 is transmitted to the driving device 15 for driving the zero. A temperature detector 30 for detecting a sintering temperature is provided above the sintering conveyor 10, and the detected value is input to the control unit 12. Further, an ITV 19 is provided on the upper wall of the main combustion chamber so as to monitor the post-combustion stage, whereby the burn-off position is detected. This detection is performed by image processing. And also about this detection result,
The same as the detected temperature value is input to the control unit 12.

The supply of primary air to the wind boxes 4a, 5a, 6a corresponding to the respective storage stages 4, 5, 6, 10a is performed by a primary air blower 16 by a primary air blower pipe 17.
Done through. The supply amount is appropriately controlled by each control valve 18 or the like based on the detection result. The secondary air is also supplied into the combustion chamber by a secondary air blower (not shown). After the unburned portion contained in the combustion gas generated by the combustion in the combustion stage 5 and the like is completely burned by the secondary air, the exhaust pipe 9
To be discharged from As described above, the stoker-type incinerator 1 according to the present embodiment is configured, and based on the detection result of the burn-out position or the sintering temperature, the transport speed of the incinerated material in each stoker stage or to each wind box. The amount of air introduced per unit time or the amount of air supplied per unit time to the retained incinerated ash is controlled.

Next, the stoker type incinerator 1 having the above structure
The drying, burning and sintering steps of the incinerated material according to the present invention will be described below in order. First, an incinerated material such as municipal waste is supplied onto a drying stage 4 so as to be extruded by a waste transporter 3 through a waste supply port 2. On the drying stage 4, the primary air heated to a predetermined temperature by an external heating device (not shown) and supplied to the wind box 4 a passes through the material to be incinerated and reaches the main combustion chamber 7 in the process of being incinerated. Moisture in the material evaporates, ignition is promoted, and thermal decomposition is partially performed, followed by drying. Furthermore, drying is also performed by heat radiation from the entire main combustion chamber 7 which has been heated to a high temperature by combustion in a combustion stage described later.

The incinerated material having passed through the drying step is moved to the combustion stage 5. Here, ignition is caused by the primary air supplied from the wind box 5a, and volatile components and fixed carbon components are burned. Then, in the post-combustion stage 6, the unburned components that have passed without being burned are burned until they completely become ash. Further, the pyrolysis gas generated in the combustion chamber is mixed with the secondary air to reach the secondary combustion chamber, where it is burned.

The incinerated ash after the combustion is then conveyed to a sintering section connected to the post-combustion stage, where it is retained on the sintering conveyor 10 so as to have a predetermined thickness. The incinerated ash after combustion generally contains about 5% of unburned components. The present inventor has found that the incineration ash can be sufficiently sintered by efficiently burning the unburned components. As a result of an actual experiment, it was confirmed that sintering was possible as long as unburned components were contained even at about 2%. Therefore, the air supply unit 1
The unburned portion contained in the heated primary air supplied from Ob and the high-temperature incineration ash retained in the sintering conveyor 10 burns, and the incineration ash is sintered. At this time, based on the detection result of the burn-out position or the sintering temperature, the transfer speed of the incinerated material in each stoker stage or the amount of air introduced into each wind box per unit time is adjusted to control the burn-out position. This makes it possible to secure the unburned components required for sintering.
Further, by controlling the amount of introduced air per unit time supplied to the incinerated ash so as not to be excessive, the temperature can be increased to 1000 ° C. or more required for sintering and heating can be performed. This ensures sintering of the incinerated ash,
High elution stability is obtained for heavy metals and the like, and a sintered product that can be reused as a roadbed material or the like can be obtained.

In the embodiment shown in FIG. 1, a self-combustion type sintered portion having no ignition burner is shown. However, the present invention is not limited to this. A burner is used for the sintering conveyor 10 so that ignition can be reliably performed even in the lower layer at a low temperature.
May be provided at the lower part of the frame. Also, not necessarily
It is not necessary to supply the air from the lower side of the sintering conveyor 10, and for example, the air may be supplied from the upper side.

The above is the description of the stoker-type incinerator 1 according to this embodiment. According to this, in the incineration process in the stoker-type incinerator, it is possible to sinter incinerated ash, It is possible to obtain a stoker-type incinerator that can improve the dissolution stability of stoker-type incinerators that can be processed to a state where they can be reused. Can be realized. In addition,
The description of the above embodiment also serves as an explanation of an embodiment of a method for treating incineration ash by a stoker-type incinerator according to the present invention.

Next, FIG. 2 schematically shows a cross section of a side surface of a stoker type incinerator 20 according to a second embodiment. FIG.
In the stoker type incinerator 20, the garbage supply port 2, the pusher type garbage transporter 3, the stoker stages 4, 5, 6 and the wind boxes 4a, 5a, 6a to which the primary air is supplied are provided. Subsequently, a main combustion chamber 7 is provided, and a secondary combustion chamber 8 for performing combustion with the supplied secondary air is provided above the main combustion chamber 7 and continues to an exhaust pipe 9. 13
Ash transport conveyor 14 through the
The above configuration is the same as that of the stoker-type incinerator 1. Although not shown, the burn-off position is detected by the ITV 19, and based on the detection result, the transport speed of the incinerated material in each stoker stage or the amount of air introduced into each wind box per unit time is adjusted, and the burn It is the same as in the case of the stoker type incinerator 1 that the unburned portion required for sintering is secured by controlling the cutting position.

However, the configuration of the sintering section is different from that of the stoker type incinerator 1. In the stoker type incinerator 20, a sintering section is provided downstream of the post-combustion stage 6, and an ash pot 21 capable of temporarily storing incinerated ash, and an air supply section for ventilating the stored incinerated ash. 22.

FIG. 3 is an enlarged schematic view of the sintered part. The ash pot 21 is disposed below the downstream side of the post-combustion stage 6, and is conveyed so that the incinerated ash falls.
This fall ash is stored. The lower part of the ash pot 21 has a grate bottom 22 that can be opened and closed, and the ash that has been sintered is opened and discharged as shown in FIG. 3.

Further, a screen 24 which is a sieve capable of separating and removing excessive incombustibles D is provided on the upper surface of the ash pot 21, so that incombustibles can be prevented from being mixed into incinerated ash. As a result, a factor that hinders sintering is removed, sintering is facilitated, and a highly pure sintered product can be obtained efficiently. Then, the removed excessive incombustible material D is discharged outside through the discharge chute 25.

Further, a burner 26 is provided below the ash pot 21 so that the lower layer, which is lower in temperature than the upper layer of the stored incineration ash, can reliably ignite.

In the above configuration, the stoker type incinerator 2
0 indicates that the incinerated ash stored in the ash pot 21 can be sintered. FIG. 4 is a schematic diagram in which a cross section of the ash pot 21 is enlarged. In this figure, the grate bottom 23 is in a closed state, and the high-temperature incineration ash C transported from the post-combustion stage 6 is
It shows a state of being stored in the ash pot 21. At this time, as for the incineration ash C, the unburned portion required for sintering is secured by controlling the burn-out position in the same manner as in the case of the stoker-type incinerator 1.

Here, a predetermined amount of incineration ash C is stored in the ash pot 21, and the air supplied from the air supply unit 22 and the unburned components contained in the incineration ash C are ignited by the burner 26. And burn. Although not shown, the sintering temperature is measured in the same manner as in the case of the stoker-type incinerator 1. Based on the measured temperature, the amount of air introduced into the incineration ash C per unit time is excessive. By controlling the temperature so as not to be increased, the temperature is raised to 1000 ° C. or more necessary for sintering and the heat treatment is performed, similarly to the case of the stoker-type incinerator 1. When the sintering is completed, the grate bottom 23 is opened and the sintered product is discharged as described above. This sintered product is to be reused.

A bottom pad 27 made of noncombustible material is provided in the indeterminate portion of the ash pot 21 to protect the grate bottom 23 so that a long-life ash pot can be obtained. .

The embodiment is not limited to the above, and may be modified as follows, for example. (1) In FIGS. 1 and 2, the stoker-type incinerator is described as a type in which the stoker stages are sequentially lowered in a stepwise manner. The apparatus and method of the invention can be applied.

(2) In FIG. 1 and FIG. 2, the wind boxes of each stoker stage are illustrated one by one, but a plurality of wind boxes, for example, two wind boxes may be arranged in series. Good. Further, the apparatus and method of the present invention can be applied to a stoker-type incinerator of a type in which the combustion stage 5 and the post-combustion stage 6 are integrated.

(3) In FIGS. 1 and 2, an exhaust gas outlet may be provided in the combustion chamber, and a system may be provided for inducing the exhaust gas extracted therefrom to be mixed with air in the sintering section. This makes it possible to effectively utilize the high-temperature ash gas to promote ignition in the sintered part.

(4) In FIGS. 1 and 2, there is provided a mechanism for supplying the ash that has fallen onto the fall ash conveyor to the sintering section, and sinters the ash together with the incineration ash carried from the post-combustion stage. Processing may be performed.

[0047]

As described above, according to the method for treating incineration ash by the stoker-type incinerator according to the first aspect, in the incineration process in the stoker-type incinerator, the incineration ash is sintered to remove heavy metals and the like. The dissolution stability can be enhanced, and it can be processed to a state where it can be reused. Thus, a method for treating incineration ash of a stoker-type incinerator which is very excellent in energy efficiency can be obtained.

According to the method for treating incineration ash by the stoker type incinerator according to the second aspect, by controlling the burnout position,
It is possible to secure the unburned components required for sintering. Further, by controlling the amount of air introduced per unit time supplied to the incinerated ash, it is possible to surely raise the temperature to a temperature range necessary for sintering. Therefore, there is an effect that the incineration ash can be treated to a state where it can be reliably reused.

According to the stoker-type incinerator of the third aspect, in the incineration process in the stoker-type incinerator, the incineration ash is sintered, the dissolution stability of heavy metals and the like is increased, and the ash is treated until it can be reused. Thus, it is possible to obtain a stoker-type incinerator that can perform the incineration ash treatment of the stoker-type incinerator, which is very excellent in energy efficiency.

According to the stoker-type incinerator of the fourth aspect, there is an effect that ignition can be reliably performed even in the lower layer at a lower temperature than in the upper layer of the incinerated ash.

According to the stoker type incinerator according to the fifth aspect, in the incineration process in the stoker type incinerator, the incineration ash is sintered, the dissolution stability of heavy metals and the like is increased, and the ash is treated until it can be reused. Thus, it is possible to obtain a stoker-type incinerator that can perform the incineration ash treatment of the stoker-type incinerator, which is very excellent in energy efficiency.

According to the stoker type incinerator according to the sixth aspect, it is possible to prevent incombustible substances from being mixed into the incinerated ash, so that factors which hinder sintering are eliminated, sintering is facilitated, and a sintered product of high purity is obtained. Can be obtained efficiently.

According to the stoker-type incinerator of claim 7, there is an effect that ignition can be reliably performed even in the lower layer at a lower temperature than in the upper layer of the stored incineration ash.

According to the stoker type incinerator of the eighth aspect, there is an effect that the bottom of the grate can be protected and the life of the ash pot can be extended.

[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 cross section of a side surface of another stoker type incinerator according to the present invention.

FIG. 3 is a diagram schematically showing a cross section of a partial side surface of another stoker-type incinerator according to the present invention.

FIG. 4 is a diagram schematically showing a cross section of a partial side surface of another stoker-type incinerator according to the present invention.

[Description of Signs] 1 Stoker type incinerator 2 Garbage supply port 4 Drying stage 5 Combustion stage 6 Post-combustion stage 7 Main combustion chamber 10 Conveyor for sintering 12 Control unit 16 Blower for primary air 18 Control valve 19 ITV 20 Stoker type incineration Furnace 21 Ash pot 22 Air supply unit 23 Grate bottom 24 Screen 26 Burner 27 Bottom bed 30 Temperature detector

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F23G 5/44 F23G 5/50 H 5/50 N B09B 3/00 303L 303H 303M (72) Inventor Katsuya Akiyama 1-5-5 Takatsukadai, Nishi-ku, Kobe-shi, Hyogo Kobe Steel, Ltd.Kobe Research Institute (72) Inventor Masamitsu Takahashi 1-3-18 Wakihama-cho, Chuo-ku, Kobe-shi, Hyogo Kobe Steel Kobe Ltd. (72) Inventor Shoji Umezono 1-31-18 Wakihama-cho, Chuo-ku, Kobe City, Hyogo Prefecture Kobe Steel, Ltd.Kobe Head Office (72) Inventor Hisanori Shimakura 1-3-3, Wakihama-cho, Chuo-ku, Kobe City, Hyogo Prefecture No. 18 Kobe Steel Ltd. Kobe head office F term (reference) 3K061 GA05 GA08 HA06 HA17 NA05 3K062 AA02 AB02 AC01 BA01 CA01 CA08 CB03 DB05 DB13 3K065 AA 02 AB02 AC01 BA05 BA08 DA01 4D004 AA36 AA46 AB01 AB03 BA02 CA28 CA30 CA42 CB34 CB45 DA01 DA02 DA03 DA06 DA12 DA20

Claims (8)

[Claims] An incinerator supplied from a refuse supply port into a combustion chamber is dried and thermally decomposed while sequentially moving over a plurality of stoker stages having a wind box in the combustion chamber. A method of treating incineration ash by a stoker-type incinerator for burning, wherein the incineration ash burned in a post-combustion stage that is a stoker stage for final combustion among the stoker stages is temporarily provided downstream of the post-combustion stage. A stoker characterized by having a sintering step of heating the incinerated ash to 1000 ° C. or higher by burning the unburned portion in the incinerated ash while supplying air to the incinerated ash during the stay. Treatment method of incineration ash by the incinerator. 2. In the stoker type incinerator, a burn-out position in a post-combustion stage is detected, or a temperature of the incineration ash during the sintering is detected, and incineration at each stoker stage is performed based on the detection result. 2. The stoker-type incineration according to claim 1, wherein the stoker-type incineration according to claim 1, wherein a conveying speed of an object, an amount of air introduced into each wind box per unit time, or an amount of air introduced per unit time supplied to the incinerated ash is controlled. How to treat incinerated ash in a furnace. 3. Drying and thermal decomposition of the incineration material supplied from the refuse supply port into the combustion chamber while sequentially moving the plurality of stoker stages having a wind box below in the combustion chamber, A stoker-type incinerator for burning, wherein the incineration ash burned in a post-combustion stage, which is a stoker stage for final combustion among the stoker stages, can be moved so as to be able to temporarily stay therein, and the post-combustion stage A conveyor installed downstream of the incinerator ash, and an air supply unit for ventilating the incinerated ash, and burning unburned components in the incinerated ash while supplying air to the incinerated ash. A stoker-type incinerator characterized in that a sintering section for further heating the incinerated ash to 1000 ° C. or higher is connected to the post-combustion stage. 4. The stoker-type incinerator according to claim 3, further comprising a burner at a lower portion of the conveyor for promoting ignition of unburned components in the incinerated ash. 5. An incinerator supplied from a refuse supply port into the combustion chamber is dried and thermally decomposed while sequentially moving over a plurality of stoker stages having a wind box in the combustion chamber. A stoker type incinerator for burning, in which incineration ash burned in a post-combustion stage, which is a stoker stage for final combustion among the stoker stages, can be temporarily stored,
An ash pot installed downstream of the post-combustion stage and having a grate bottom that can be opened and closed, and an air supply unit that ventilates the stored incineration ash, and supplies air to the storage incineration ash. A stoker-type incinerator, wherein a sintering section for further heating the incinerated ash to 1000 ° C. or more is connected to the post-combustion stage by burning unburned components in the incinerated ash while burning. 6. The stoker-type incinerator according to claim 5, wherein a screen capable of removing excessive incombustibles is provided on an upper surface of the ash pot. 7. The stoker-type incinerator according to claim 5, wherein a burner for promoting ignition of unburned components in the stored incineration ash is provided below the bottom of the ash pot. 8. The stoker-type incinerator according to claim 5, wherein an inner bottom of the ash pot has a bottom made of incombustible material.