JP2000088232A - Incinerator and incineration ash handling method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an incinerator in which an appropriate anti-dioxine measure can be taken even for incineration ash, by sustaining incineration ash subjected to ash treatment at the dechlorination treating temperature in reducing atmosphere and then quenching the incineration ash. SOLUTION: In order to measure the temperature of incineration ash on a post-combustion zone 8, a radiation temperature detecting means 1 is disposed above the post-combustion zone 8. Incineration ash temperature from the radiation temperature detecting means 1 is inputted to a dechlorination control means 24 along with an oxygen concentration measurement from an oxygen sensor 20. The control means 24 delivers operational commands to a cooling water control valve 25, a fuel control valve 25 and a heater switch 26 in order to sustain the temperature of incineration ash at a specified level. When the oxygen concentration and the temperature are sustained at specified levels for a specified time, the incineration ash can be dechlorinated. The dechlorinated incineration ash is fed through a guide passage 10 to a post-treating process by means of a stoker. In other words, the incineration ash is dropped into a water sealed mechanisms and quenched.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating incineration ash in an incinerator for incineration while transporting garbage, and an incinerator therefor.

[0002]

2. Description of the Related Art In recent years, attention has been focused on the treatment of waste discharged from incinerators because dioxin in the waste has a great effect on humans.
Usually, about 2% of dioxins discharged from incinerators
It is known that 5 to 40% is contained in incinerated ash, about 60 to 75% is contained in fly ash collected by a dust collector or the like, and the remainder is contained in exhaust gas.

[0003]

Dioxin in exhaust gas is regulated by the Air Pollution Control Law.
Regarding dioxin in fly ash, various dedicated treatment devices have been developed. However, there is a method for treating incineration ash in a melting furnace, but it is costly, and it costs as much as an incinerator. Therefore, at present, it is left untreated without being treated in a landfill without appropriate treatment, and some countermeasures are required. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for treating incineration ash in an incinerator that can take appropriate measures against dioxin even for incineration ash, and an object of the present invention.

[0004]

According to a first aspect of the present invention, there is provided an incineration ash treated in the post-combustion zone from a post-combustion zone for ashing a burned incineration object. In the incineration ash treatment process up to the post-treatment process of treating the incineration ash, set the dechlorination treatment process to maintain the incinerated ash at the dechlorination treatment temperature in a reducing atmosphere, dechlorination treatment The incineration ash dechlorinated in the process is quenched in the quenching process, and the operation and effect are as follows.

[Action] By maintaining a desired temperature in a reducing atmosphere in which the oxygen concentration is kept low, dechlorination of the incinerated ash proceeds, and dioxin is converted into a detoxifying substance. By quenching this detoxified substance, the detoxified substance is prevented from reacting with another substance to thereby prevent the generation of dioxin again.

[Effect] By performing the dechlorination step and the quenching step on the incineration ash as described above, dioxin in the incineration ash can be removed. And since such a treatment process is performed in an incinerator called a post-combustion zone or a post-treatment process, it has the following advantages as compared with a case where incineration ash once discarded in an incineration plant is targeted. . The post-combustion zone is originally equipped with a combustion air supply facility and a heating device, etc. for incineration treatment. Since the incineration ash in the post-combustion zone has a certain temperature or higher, a dechlorination step for maintaining the dechlorination temperature can be easily created.

According to a second aspect of the present invention, there is provided a post-treatment process for treating incineration ash treated in the post-combustion zone from a post-combustion zone for ashing the burned incineration material. In the incineration ash treatment path, a dechlorination treatment means comprising oxygen concentration adjusting means for creating a reducing atmosphere and a temperature adjustment means for setting the incineration ash to a dechlorination treatment temperature is provided. The quenching means for quenching the incinerated ash is provided, and the operation and effect thereof are as follows.

[Effect] By creating a reducing atmosphere by means of oxygen concentration adjusting means and maintaining the desired temperature by means of temperature adjusting means in the reducing atmosphere, dechlorination of the incinerated ash proceeds and dioxin is converted into a detoxifying substance. Change. By quenching the detoxified substance by the quenching treatment means, the once detoxified substance is prevented from reacting again with other substances, and dioxin is prevented from being regenerated.

[Effect] By performing the dechlorination treatment step and the quenching treatment step on the incinerated ash as described above, dioxin in the incinerated ash can be removed. Since such an incinerator is equipped with such a processing means, no special device other than the incinerator is required, which is advantageous in terms of manufacturing cost. The post-combustion zone is originally equipped with a combustion air supply facility and a heating device, etc. for incineration treatment. Since the incineration ash in the post-combustion zone has a certain temperature or higher, a dechlorination step for maintaining the dechlorination temperature can be easily created.

[Structure] A feature of the present invention according to claim 3 is that, in the feature of the present invention according to claim 2, the dechlorination treatment means is provided in the post-combustion zone. The operation and effect are as follows.

[Effects] The treated material sent from the combustion zone to the post-combustion zone is considered to be in a considerably high temperature state, and the heat retained in the treated material is used to perform the dechlorination treatment temperature (350 ° C.). (550 ° C.), the dechlorination treatment and the incineration treatment (ashing treatment temperature is about 100 ° C.)
(About 500 ° C.). Since the two processes can be performed simultaneously, the processing steps can be simplified.

[Structure] According to a fourth aspect of the present invention, in the second aspect of the present invention, the dechlorination means includes a post-treatment step for incinerated ash from the post-combustion zone. The operation and effect are as follows.

[Effects] Since dechlorination is performed in the guide route from the post-combustion zone to the post-treatment process, the ash discharged from the incinerator is smaller than in the case of treating incinerated ash once discarded at a disposal site. It is considered that the physical properties or chemical properties of the treated material immediately after the incineration treatment are constant because it is not a waste product, so pre-treatment such as drying treatment is performed before dechlorination treatment No need. In addition, since the dechlorination treatment is provided in the guide route portion, the guide route portion itself has only a function of guiding the processed material which has been originally ashed to the post-processing step. By providing the dechlorination treatment means in the guide route, a function can be added to the guidance route, and it is not necessary to newly secure a space for providing the dechlorination treatment means.

[Structure] According to a fifth aspect of the present invention, there is provided the characteristic structure according to the fourth aspect of the present invention, wherein the guide path section and the dechlorination treatment means are provided together with the dechlorination treatment means from the post-combustion zone. The storage means for once receiving the incineration ash is provided, and the operation and effect are as follows.

[Function and Effect] The incinerated treated material from the post-combustion zone is accumulated by the accumulation means, and the accumulated incinerated ash is subjected to dechlorination treatment by the dechlorination treatment means. Since the location of the dechlorination treatment means is set in the guide route section, it is only necessary to provide storage means for receiving the processed material that had only moved to the post-processing step, and added to perform the dechlorination treatment The number of devices to be used can be reduced.

According to a sixth aspect of the present invention, in the second aspect of the present invention, the oxygen concentration adjusting means adds nitrogen to combustion air for treating the incinerated ash. This is a means for creating a reducing atmosphere by using the following method.

[Operation and Effect] Air supply means is originally provided for the combustion zone and the post-combustion zone. Therefore, by using an existing air supply means instead of providing a dedicated mechanism for creating a reducing atmosphere, the reducing atmosphere can be easily created by a process of simply adding nitrogen to the combustion air.

[Structure] According to a seventh feature of the present invention, in the second feature of the present invention, the oxygen concentration adjusting means controls the supply amount of combustion air for treating the incinerated ash. It is a damper mechanism that adjusts, and its operation and effect are as follows.

[Effects] By adjusting the supply amount of combustion air with a damper, the supply amount of air is reduced if the oxygen concentration is higher than a predetermined value, and the air supply amount is reduced if the oxygen concentration is lower than a predetermined value. Can be controlled, and an appropriate reducing atmosphere can be created. Therefore, it is not necessary to take measures such as mixing nitrogen into the means for supplying combustion air, and it is sufficient to simply provide a damper.

[Structure] The characteristic structure according to the present invention described in claim 8 is that, in the characteristic structure according to the present invention described in claim 2, the temperature control means is means for cooling the incinerated ash. The operation and effect are as follows.

[Function and Effect] Since the temperature of the incinerated ash itself needs to be maintained at a predetermined temperature in order to perform the dechlorination treatment on the incinerated ash, if the incinerated ash is high temperature, it is cooled by a cooling means. Will do. In other words, since the cooling means acts on the incinerated ash directly, the cooling effect can be directly exerted as compared with the method of adjusting the ambient temperature.

[Configuration] According to a ninth aspect of the present invention, in the characteristic configuration of the second aspect of the present invention, the temperature control means is a means for heating the incinerated ash. The operation and effect are as follows.

[Effects] Since it is necessary to maintain the temperature of the incinerated ash itself at a predetermined temperature in order to perform the dechlorination treatment on the incinerated ash, if the incinerated ash is low in temperature, the heating means may be heated to a high temperature. Will be transformed. That is, since a means for directly heating the incinerated ash is applied, the heating effect can be directly exerted as compared with the method of adjusting the ambient temperature.

[Structure] According to a tenth aspect of the present invention, in the characteristic structure according to the first or second aspect, a conveying device for conveying the incinerated ash backward is provided in the after-burning zone, and the incineration is performed. An inversion mechanism for inverting the ash up and down is provided, and the operation and effect are as follows.

[Effects] The transport device sends the incinerated ash that has been incinerated in the post-combustion zone to the post-processing step. By providing the transport device with a reversing mechanism, the transport device sends the incinerated ash. Objects can be inverted. Since incineration ash will mix the surface layer and the bottom layer,
The temperature, oxygen concentration, degree of accumulation, etc. of the ash itself are made uniform,
The dechlorination step becomes easier.

[0026] According to the eleventh aspect of the present invention, the incineration material is burned on the upstream side in the conveying direction of the incineration material in the post-combustion zone for processing the incineration material sent from the combustion zone. An ashing treatment region to be treated and a dechlorination treatment region for dechlorinating the incinerated material are provided on the lower side of the transportation of the incineration treatment region. The operational effects are as follows.

[Effects] By setting an incineration treatment area on the upstream side of the conveyance near the combustion zone, unashed substances which are obstacles to the dechlorination treatment are preliminarily treated to promote incineration. ing. Moreover, in the post-combustion zone, the dechlorination treatment area can be secured while leaving the incineration treatment area exhibiting the original function, so that it is not necessary to secure a dedicated area for the dechlorination treatment step.

[Structure] According to a twelfth aspect of the present invention, in the second aspect, the quenching means receives the combustion residue leaking from the combustion zone or the post-combustion zone in water. It is a water seal mechanism for stopping and collecting, and its operation and effect are as follows.

[Effects] In the combustion zone and the post-combustion zone, a grate for transporting the processed material is provided, but the combustion residue may leak from between the grate. A water seal mechanism is provided for sending to the melting process. Since the water seal mechanism is provided corresponding to the post-combustion zone, the water seal mechanism can be used for rapidly cooling the incinerated ash subjected to the dechlorination treatment. The water seal mechanism can also be used as the quenching means, and the processing equipment can be simplified.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a refuse incinerator has a hopper 3 for storing refuse to be incinerated, a combustion chamber 2 for incinerating refuse, and an ash pit 4 for collecting incinerated ash.
Are provided. The combustion chamber 2 includes a drying zone 6 for drying and heating the dust introduced by a pusher 5 provided at a lower end portion of the hopper 3 to near an ignition point, a combustion zone 7 for burning the dried dust, and combustion in the combustion zone 7. The post-combustion zone 8, which incinerates the garbage that has been made, is arranged stepwise from above to below. The garbage that has incinerated in the post-combustion zone 8 falls through the guide path section 10 that leads to the post-processing step, and is conveyed and collected in the ash pit 4 by a conveyor mechanism 11A described later.

The combustion zone 7 comprises a front combustion zone 7A and a rear combustion zone 7
B is controlled in such a manner that dust is mainly burned in the front combustion zone 7A and then completely burned in the rear combustion zone 7B. In the lower part of the combustion chamber 2, there is provided a supply path 17 for supplying the heated air sent by the blower 16 to the combustion chamber 2 as air for drying / combustion. The supply path 17 is provided in the drying zone 6, the combustion zone 7, and the post-combustion zone 8. A damper D for adjusting the supply amount is provided for each. The combustion gas generated in the combustion chamber 2 is extracted from the combustion heat by the exhaust heat boiler 12 in the form of steam to be used as energy of the power generator 13 and supplied to the outside of the plant.
Dust and harmful gases are removed by an exhaust gas treatment device 14 including an electric dust collector or the like, and the exhaust gas is exhausted. As shown in FIG. 3, a pusher 5 is provided in the drying zone 6, the combustion zone 7, and the post-combustion zone 8.
The fixed grate 9A and the movable grate 9B which stir and transport the trash introduced by the above are alternately arranged along the carrying direction, and the movable grate 9B is slid in an oblique vertical direction by a hydraulic mechanism (not shown). And a stoker mechanism 9 for transporting dust.

At this time, a drying zone 6, a combustion zone 7, and a post-combustion zone 8 are provided to supply air for drying or combustion to the dust on the grate.
Are provided below, the air for drying is provided to the drying zone 6, the air for combustion is provided to the combustion zone 7, and the after combustion zone 8 is provided.
Is configured to supply air for incineration.
Below the wind boxes 6a, 7a, 8a, the wind boxes 6a, 7
A water sealing mechanism 11 is provided with a conveyor mechanism 11A for transporting falling objects such as ash from a and 8a toward the ash pit 4.

The basic combustion control mode in the incinerator is as follows. As shown in FIG. 1, the combustion chamber 2 includes radiation temperature detecting means 1 for detecting the temperature of dust on the drying zone 6 and a thermocouple for detecting the temperature of the combustion zone 7 in order to monitor the combustion state. Furnace outlet temperature detection means 15, pressure detection means (not shown) for detecting the amount of combustion air, and the like are provided. The combustion control device 18 equipped with a microcomputer receives the detection values from the various sensors and evaluates the combustion state by the combustion control device 18. Based on the evaluation result, the pusher 5 and the drive cylinders C4, C3, C
2, the operating speed of C1 is adjusted, and the feeding speed of dust by the pusher 5, the conveying speed of dust by the stoker mechanism 9, the opening of the damper D, and the like are adjusted so as to adjust and maintain a proper combustion state. .

A configuration for reducing dioxin in the post-combustion zone 8 will be described. As a method of reducing the content of dioxin with respect to the incinerated ash incinerated in the post-combustion zone 8, the temperature of the incinerated ash is dechlorinated in a reducing atmosphere (oxygen concentration of the incinerated ash itself is 0 to 8%). Processing temperature (350-550
C.) for a predetermined time (within about 1 hour), and then quenching treatment (200 ° C. or less).

The means for maintaining the oxygen concentration in the incineration ash is constituted as follows. As shown in FIG. 2, a supply port 8b for combustion air is provided for the post-combustion zone wind box 8a,
A nitrogen supply port 8c is provided separately from the air supply port 8b, and nitrogen separated based on air is supplied to the wind box 8a. Nitrogen is sealed in this way because the post-combustion zone 8 originally has an atmosphere with a high oxygen concentration.

Here, the oxygen concentration is adjusted by a method of filling nitrogen, but another method is as follows.
As shown in FIG. 4, the wind box 8a is located below the stalker mechanism 9.
A large number of small damper mechanisms 19 may be arranged side by side in the ventilation path, and a reducing atmosphere may be created by opening and closing the individual small damper mechanisms 19. The means for mixing nitrogen into the wind box 8a or the small damper mechanism 19 provided in the wind box 8a is collectively referred to as oxygen concentration adjusting means. As a means for measuring the oxygen concentration in the incineration ash, as shown in FIG. 3, an oxygen sensor 20 may be embedded in the tip of the fixed grate 9A, and the oxygen concentration may be measured by contact with the incineration ash. .

The temperature control means for maintaining the temperature of the incinerated ash on the post-combustion zone 8 at the dechlorination temperature will be described. In order to measure the temperature of the incineration ash on the post-combustion zone 8, the radiation temperature detecting means 1 is installed above the post-combustion zone 8, as shown in FIG. However, instead of the radiation temperature detecting means 1, a thermocouple type temperature sensor may be provided at the tip of the fixed grate 9A. The mechanism for maintaining the temperature of the dechlorination treatment is highly dependent on the temperature of the processed material sent from the combustion zone 7. Therefore, both the heating means and the cooling means are provided. It will be maintained at the processing temperature. As shown in FIG. 2, a supply space a is provided on both sides of the post-combustion zone 8,
A pipe 21 for cooling water and a pipe 22 for fuel are provided in the space a, and a nozzle 21A for discharging cooling water and a burner 22A for heating are mounted on the inner side wall. Burner 22
About A, as shown in FIG. 1, it is also attached to the rear wall of the incinerator. On the other hand, a pipe 21 for cooling water and a pipe 23 for heating are laid over the left and right side walls above the stalker mechanism 9, and an intermediate portion of the pipes 21 and 23 is inserted into the incineration ash to form the incineration ash itself. Is cooled and heated.
Note that a string-shaped heater is inserted into the heating pipe 23. Here, the cooling water pipe 21, the heating pipe 23, the burner 22A, the nozzle 21A, the heater, and the like are referred to as temperature control means. The temperature control means and the oxygen concentration control means are collectively referred to as dechlorination treatment means.

With the above configuration, the temperature of the incinerated ash from the radiation temperature measuring means 1 and the measured oxygen concentration value from the oxygen sensor 20 are input to the control means 24 for dechlorination and maintained at predetermined values. The control means 24 gives an operation command to the control valve 25 for cooling water, the control valve 25 for fuel, and the switch 26 for heater. When the oxygen concentration and the temperature are maintained in a predetermined state and maintained for a certain period of time, the incineration ash can be dechlorinated. The dechlorinated incinerated ash is sent to the post-processing step by the stalker mechanism 9 through the guide path unit 10. That is, the incinerated ash falls into the water sealing mechanism 11 and is rapidly cooled.

Another embodiment will be described below. [1] As a method of cooling the incinerated ash in the temperature adjusting means, a cooling structure may be provided in the fixed grate 9A. FIG.
As shown in the figure, a cooling water pipe 21 is connected to the base end of the fixed grate 9A through both side frames (not shown) supporting the fixed grate 9A, and the left and right sides of the fixed grate 9A are fully cooled. The water path 27 may be formed, the fixed grate 9A may be directly cooled, and the incinerated ash may be cooled by the fixed grate 9A. [2] The incineration ash reversing mechanism 28 that assists in maintaining the oxygen concentration at a predetermined value will be described. As shown in FIGS. 6 and 7, a round bar-shaped support shaft 29 is fixed to a fixed grate 9 over fixed support frames (not shown) provided on both sides in the furnace.
A fixed number of fixed grate 9A is loosely fitted around each support shaft, and fixed grate 9A is swingable around the axis of support shaft 29. 30 back bias. All the fixed grate 9A of the post-combustion zone 8 is configured to be swingable. On the other hand, the same configuration is applied to the movable grate 9B. In other words, a number of round-bar-shaped support shafts 29 corresponding to the number of the movable grate 9B are erected and fixed on a movable support frame (not shown) provided near the left and right fixed support frames. The movable grate 9B is loosely fitted to each support shaft 29, each movable grate 9B is configured to be swingable around the axis of the support shaft 29, and is returned and urged by a spring 30. After combustion zone 8
Are configured to be swingable. With the above configuration, each fixed grate 9A and each movable grate 9B can swing around each support shaft 29. And FIG.
As shown in FIG. 7, a rack and pinion mechanism 31 is provided which drives the fixed grate 9A to rise and swing toward the upper side in the transport direction with respect to the fixed grate 9A corresponding to the end position in the post-combustion zone 8. The pinion 31A is fixed to the fixed grate 9A, the rack gear 31B is attached to a fixed support frame, and the rack gear 31B is driven by the cylinder 32. During normal operation,
As shown in (a), each fixed grate 9A and movable grate 9
B is set in a forward falling state in contact with the back surface of the grate located on the lower side of the conveyance. Here, when the rack and pinion mechanism 31 is operated, as shown in FIG. 7B, the corresponding fixed grate 9A swings backward (upward in the conveyance direction). Since the fire grate 9A, 9B on the upper side of the conveyance swings, the incineration ash on the fire grate 9A, 9B is agitated to be in an inverted state.

[3] Although the wind box 8a for the post-combustion zone 8 described above is described as a single one, here, the one divided into two in the transport direction is described. As shown in FIG. 8, the upper wind box 8e and the lower wind box 8f are divided, and the combustion air intake 8g and the lower wind box 8f are provided in the upper wind box 8e.
Is provided with a nitrogen inlet 8h. As a result, in the upper portion of the post-combustion zone 8 corresponding to the upper wind box 8e, the processed material transported from the combustion zone 7 is ashed, and the post-combustion zone 8 corresponding to the lower wind box 8f is processed. The lower side portion can be configured to perform a dechlorination process on the incinerated ash that has been incinerated. With the above configuration, the ashing processing area is provided on the upper side in the transport direction, and the dechlorination processing area for dechlorination is provided on the lower transport side of the ashing processing area.

[4] A configuration in which the dechlorination treatment means is provided in the guide path section 10 for guiding the incinerated ash from the post-combustion zone 8 to the post-treatment step will be described. As shown in FIG. 9, a pair of upper and lower on-off valves 33 </ b> A and 33 </ b> B for receiving incineration ash from the post-combustion zone 8 are provided in the guide path section 10. Lower open / close valve 3
3B is closed, and the upper open / close valve 33A is opened, and the lower open / close valve 33B receives and holds the incineration ash. The incineration ash is accumulated by closing the upper opening / closing valve 33A in a state where a predetermined amount is accumulated. Such a pair of upper and lower on-off valves 33A,
33B is referred to as incineration ash accumulation means. A heater-type heating device 34 for incinerated ash is provided on both sides of the guide path portion 10. Since the incinerated ash from post-combustion zone 8 is considered to have less heat, a cooling device may not be necessary.
Inlet 10A for introducing a mixture of air and nitrogen for combustion
Is also provided. By maintaining the temperature at the dechlorination temperature by the heating device 34, dioxin can be reduced. Here, an oxygen sensor for maintaining the oxygen concentration, a temperature detecting means for the incinerated ash, and a control device for controlling the dechlorination process by receiving the measured values from these are not shown. As described above, the point that the dechlorination processing means is provided in the guide path unit 10 has been described, but the quenching process is performed by the water sealing mechanism 11 described above.

[5] Water cooling mechanism 1
1 has been described. Here, when the dechlorination treatment is performed in the post-combustion zone 8, a configuration in which a quenching treatment means is provided in the above-described guide route unit 10 may be adopted. That is, as shown in FIG.
3B, the storage means 33 is used.
In step 3, receiving the dechlorinated incinerated ash sent from the post-combustion zone 8 and providing a nozzle 35 for spraying cooling water in place of the heating device 34 to rapidly cool the accumulated incinerated ash. It may be.

Incidentally, reference numerals are written in the claims for convenience of comparison with the drawings, but the present invention is not limited to the configuration of the attached drawings by the entry.

[Brief description of the drawings]

FIG. 1 is an overall longitudinal front view of an incinerator.

FIG. 2 is a vertical sectional side view showing a heating and cooling means in a post-combustion zone.

FIG. 3 is a longitudinal front view showing a dechlorination treatment step in a post-combustion zone.

FIG. 4 is a longitudinal sectional front view showing a state in which a damper is provided in a wind box for a post-combustion zone.

FIG. 5 is a perspective view showing a state where a cooling water path is provided in a fixed grate.

FIG. 6 is a perspective view showing a mechanism for inverting and stirring incinerated ash by allowing a fixed grate to be swingably driven.

FIG. 7 is an operation principle diagram showing an inverted state of a grate;

FIG. 8 is a longitudinal sectional front view showing a state in which an ashing treatment area and a dechlorination treatment area are provided in a post-combustion zone.

FIG. 9 is a vertical sectional front view showing a state in which a dechlorination treatment area is provided in a guide route to a post-treatment step.

[Explanation of symbols]

 Reference Signs List 7 combustion zone 8 post-combustion zone 9 stalker-type conveying device 10 guide route section 11 water seal mechanism 19 damper mechanism 28 reversal mechanism 33 storage means

Claims (12)

[Claims] 1. An incineration ash treatment process from a post-combustion zone (8) for incinerating burned incineration materials to a post-treatment process for treating incineration ash treated in the post-combustion zone (8). ,
Set a dechlorination process to maintain the incinerated ash at the dechlorination temperature in a reducing atmosphere in a reducing atmosphere, and quench the incinerated ash that has been dechlorinated in the dechlorination process. Of incineration ash in an incinerator that is quenched by refrigeration. 2. An incineration ash processing path from a post-combustion zone (8) for incineration of burned incineration material to a post-processing step for treating incineration ash treated in the post-combustion zone (8). A dechlorination treatment means comprising an oxygen concentration adjustment means for creating a reducing atmosphere and a temperature adjustment means for setting the incineration ash to a dechlorination treatment temperature, and quenching the dechlorinated incineration ash. Incinerator equipped with rapid cooling means. 3. The incinerator according to claim 2, wherein the dechlorination treatment means is provided in the post-combustion zone (8). 4. The incinerator according to claim 2, wherein said dechlorination treatment means is provided in a guide path section (10) for guiding incineration ash from said post-combustion zone (8) to a post-treatment step. 5. The guide path section (10) is provided with a storage means (33) for temporarily receiving incineration ash from the post-combustion zone (8) together with the dechlorination treatment means. Incinerator. 6. The incinerator according to claim 2, wherein the oxygen concentration adjusting means is means for adding nitrogen to combustion air for treating the incineration ash to create a reducing atmosphere. 7. A damper mechanism (1) for adjusting a supply amount of combustion air for treating the incineration ash, wherein the oxygen concentration adjusting means adjusts a supply amount of combustion air.
The incinerator according to claim 2, which is 9). 8. The incinerator according to claim 2, wherein said temperature adjusting means is means for cooling said incineration ash. 9. The incinerator according to claim 2, wherein said temperature adjusting means is means for heating said incineration ash. 10. A reversing mechanism (28) for providing a stoker type conveying device (9) for conveying the incineration ash backward in the post-combustion zone (8) and for inverting the incineration ash up and down.
The incinerator according to claim 1 or 2, further comprising: 11. An incineration zone for burning the incinerated material on the upstream side in the conveying direction of the incinerated material in a post-combustion zone (8) for processing the incinerated material sent from the combustion zone (7). An incinerator provided with a dechlorination treatment area for dechlorination treatment of the incineration material on the downstream side of the incineration treatment area. 12. The incinerator according to claim 2, wherein the quenching means is a water seal mechanism (11) for receiving and collecting in the water combustion residues leaking from the combustion zone and the post-combustion zone.