Cooling device, incineration device, and cooling method

Abstract

To provide a device capable of cooling and discharging incineration ash without humidifying the incineration ash.SOLUTION: The cooling device 3 is a device for cooling incineration ash generated in the incinerator 2, and includes a discharge port 43 for the incineration ash, a reservoir 45 for storing the incineration ash so as to close the discharge port 43, a cooling gas blowing unit 50 for blowing a cooling gas into the incineration ash in the reservoir 45 from one or more blowing holes 51 away from the discharge port 43, and a discharge unit 60 provided in the reservoir 45 for discharging the incineration ash from the reservoir 45 to the discharge port 43.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a cooling device, an incineration device, and a cooling method. [Background technology]

[0002] Patent Document 1 discloses an incineration ash discharge device that includes an incineration ash storage section formed at the bottom of a chute that receives incineration ash from an incinerator, and an extrusion device that pushes out the incineration ash stored in the storage section from the bottom up and discharges it. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-302040 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure provides an apparatus that can cool and discharge incineration ash without humidifying the incineration ash. [Means for solving the problem]

[0005] A cooling device according to one aspect of the present disclosure is a device for cooling incineration ash produced in an incinerator, and includes an incineration ash discharge outlet, a storage section for storing the incineration ash so as to block the discharge outlet, a cooling gas blowing section for blowing cooling gas into the incineration ash in the storage section from one or more blowing holes spaced from the discharge outlet, and a discharge section provided within the storage section for discharging the incineration ash from within the storage section to the discharge outlet.

[0006] Since cooling gas (e.g., air) is blown into one or more blowing holes away from the discharge port, the incineration ash can be cooled before reaching the discharge port. The incineration ash stored in the storage section prevents the inflow of cooling gas from the discharge port into the incinerator, thereby minimizing the impact of excess cooling gas on incineration in the incinerator. The blown cooling gas spreads within the storage section due to the resistance of the stored incineration ash, so the incineration ash is continuously cooled over a wide area while it is retained in the storage section. Therefore, the cooling of the incineration ash can be significantly advanced before discharge without relying on liquid evaporation. Therefore, the incineration ash can be cooled and discharged without humidifying it.

[0007] The discharge port may be configured to open laterally at a lower portion of the storage section, and the discharge section may be configured to repeatedly push the incineration ash from the lower portion of the storage section toward the discharge port. This makes it easy to maintain the storage of the incineration ash in the storage section while also continuously discharging the incineration ash.

[0008] The one or more blowing holes may be a plurality of blowing holes formed in the peripheral wall of the storage section at a position away from the discharge port, and the cooling gas blowing section may blow cooling gas into the incineration ash in the storage section through the plurality of blowing holes. This allows the incineration ash to be cooled more efficiently.

[0009] The peripheral wall may include a side wall along a horizontal extension direction intersecting the opening direction of the discharge port, and the plurality of blowing holes may include two or more blowing holes formed in the side wall so as to be aligned along the extension direction. This allows for more efficient cooling of the incineration ash.

[0010] The peripheral wall may include a pair of side walls facing each other in the direction of the opening of the discharge port, and the plurality of blowing holes may include a pair of blowing holes formed in each of the pair of side walls. This allows the incineration ash to be cooled more efficiently.

[0011] The plurality of blowing holes may include two or more blowing holes located at different heights, which allows for more efficient cooling of the incineration ash.

[0012] The system may further include a level sensor that detects the storage height of the incineration ash in the storage unit, and a discharge control unit that controls the discharge unit based on the detection result of the level sensor so that the storage height is equal to or higher than a target height above the discharge outlet and one or more blow holes. This can improve the temperature stability of the incineration ash.

[0013] The apparatus may further include a level sensor that detects the height of the incineration ash stored in the storage section, and an injection control section that controls the cooling gas injection section based on the level sensor so that the amount of cooling gas injected into the storage section is linked to the storage height, thereby improving the temperature stability of the incineration ash.

[0014] The apparatus may further include a temperature sensor that detects the temperature of the incineration ash in the storage section, and a blowing control section that controls the cooling gas blowing section based on the detection result of the temperature sensor so that the temperature of the incineration ash discharged from the discharge port is kept below a target temperature. This improves the stability of the temperature of the incineration ash.

[0015] The blowing control unit may maintain the amount of cooling gas blown into the storage unit at or above a predetermined lower limit, thereby preventing incineration ash from flowing into the blowing opening.

[0016] The system may further include a temperature sensor that detects the temperature of the incineration ash in the storage unit, and a discharge control unit that controls the discharge unit based on the detection result of the temperature sensor so that the storage height of the incineration ash in the storage unit is linked to the temperature of the incineration ash discharged from the discharge outlet. This improves the stability of the temperature of the incineration ash.

[0017] The incinerator may further include a gas supply unit that supplies oxygen-containing gas to the incinerator, and the cooling gas blowing unit may be configured to blow 5% or less of the oxygen-containing gas from the gas supply unit into the storage unit as cooling gas, thereby further reducing the effect of the cooling gas on incineration in the incinerator.

[0018] The incinerator may further include a seal damper that prevents gas from flowing into the storage section from the discharge port. This can prevent gas from flowing into the incinerator from the discharge port in the early stages when incineration ash is not sufficiently stored in the storage section.

[0019] The apparatus may further include a conveyor for transporting the incineration ash discharged from the discharge port, and a secondary cooling unit for air-cooling the incineration ash on the conveyor. The incineration ash can be further cooled.

[0020] An incineration apparatus according to another aspect of the present disclosure includes the above-described cooling device and an incinerator, and the incinerator is a stoker-type incinerator that incinerates waste on multiple stages of grates while sequentially moving the waste to the multiple stages of grates.

[0021] By combining a stoker-type incinerator suitable for continuous incineration with the above-mentioned cooling device, it is possible to more easily maintain the storage of incineration ash in the storage section and the continuous discharge of incineration ash.

[0022] A cooling method according to yet another aspect of the present disclosure is a method for cooling incineration ash produced in an incinerator, and includes storing the incineration ash in a storage section so as to block the incineration ash discharge outlet, blowing cooling gas into the incineration ash in the storage section through one or more inlet holes separate from the discharge outlet, and discharging the incineration ash from the storage section to the discharge outlet. [Effects of the Invention]

[0023] According to the present disclosure, it is possible to provide an apparatus that can cool and discharge incineration ash without humidifying the incineration ash. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic diagram illustrating the configuration of an incineration system. [Figure 2] FIG. 2 is a schematic diagram illustrating an example of the arrangement of a plurality of blowing holes. [Figure 3] 10A and 10B are schematic diagrams illustrating other arrangements of a plurality of blowing holes. [Figure 4]FIG. 2 is a schematic diagram illustrating the configuration of a cooling device. [Figure 5] FIG. 2 is a block diagram illustrating a hardware configuration of a control device. [Figure 6] 10 is a flowchart illustrating a discharge control procedure based on storage height. [Figure 7] 10 is a flowchart illustrating an example of a blowing control procedure based on the incineration ash temperature. [Figure 8] 10 is a flowchart illustrating an example of an emission control procedure based on incineration ash temperature. [Figure 9] 10 is a flowchart illustrating a blowing control procedure based on the reservoir height. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, the embodiments will be described in detail with reference to the drawings. In the description, the same elements or elements having the same functions are denoted by the same reference numerals, and redundant description will be omitted.

[0026] The incineration system 1 shown in Figure 1 is an example of a system that incinerates waste, cools the incineration ash, and sends it out. The waste can be any combustible waste that can be incinerated, and can be either industrial waste or general waste.

[0027] The incineration system 1 includes an incinerator 2 and a cooling device 3. The incinerator 2 incinerates waste to produce incineration ash. For example, the incinerator 2 is a stoker-type incinerator that incinerates waste on multiple stages of grates while sequentially transferring the waste to the multiple stages of grates. The incinerator 2 is not necessarily limited to a stoker-type incinerator. For example, the incinerator 2 may be a rotary kiln-type incinerator or a fluid bed-type incinerator.

[0028] For example, the incinerator 2 has a furnace body 10, a conveying section 20, and a gas supply section 30. The furnace body 10 accommodates waste to be incinerated. The furnace body 10 extends along the conveying direction D1. The furnace body 10 has a furnace body 11 and an incineration ash receiving section 12 at both ends of the furnace body 10. The furnace body 11 receives the material to be treated from above. The incineration ash receiving section 12 sends the material to be treated downward.

[0029] The conveying section 20 is provided at the bottom of the furnace body 10 and conveys the waste in the conveying direction D1. For example, the conveying section 20 has a plurality of fixed grates 21, a plurality of movable grates 22, and a drive device 23. The plurality of fixed grates 21 and the plurality of movable grates 22 are arranged alternately in the conveying direction D1.

[0030] The multiple movable grates 22 are provided to correspond to the multiple fixed grates 21, respectively. For example, each of the multiple movable grates 22 is provided on a corresponding fixed grate 21. The drive device 23 reciprocates each of the multiple movable grates 22 in the conveying direction D1 and a direction D2 opposite to the conveying direction D1. For example, the drive device 23 reciprocates each of the multiple movable grates 22 in the conveying direction D1 and the opposite direction D2 using an electric motor, a hydraulic cylinder, or the like. The drive device 23 may be configured to be able to individually change the grate speed of the multiple movable grates 22.

[0031] The grate speed is the speed at which waste is transported by the reciprocating movement of the movable grate 22. To change the grate speed, the drive device 23 may change the displacement speed of the movable grate 22 in one reciprocating movement, may change the displacement stroke of the movable grate 22 in one reciprocating movement, or may change the number of reciprocating movements of the movable grate 22 per unit time. To change the grate speed, the drive device 23 may change two or more of the displacement speed, displacement stroke, and number of reciprocating movements.

[0032] The heights of the multiple fixed grates 21 may decrease in a stepped manner as they proceed in the conveying direction D1. In this case, each time the object to be treated moves from one fixed grate 21 to the next fixed grate 21, it descends by the amount of the step between the fixed grates 21. In this way, conveying the waste in the conveying direction D1 includes displacing the object to be treated in the conveying direction D1 while also displacing the object to be treated in a direction different from the conveying direction D1 (for example, downward).

[0033] The gas supply unit 30 supplies oxygen-containing gas (e.g., air) for burning the waste to the incinerator 2. For example, the gas supply unit 30 sends the oxygen-containing gas to the waste from below the conveying unit 20 through a plurality of fixed grates 21 and movable grates 22. The oxygen-containing gas may be at room temperature or may be preheated.

[0034] The gas supply unit 30 may be configured to be able to individually change the amount of air blown to each of the plurality of air blowing areas 35 on the conveying unit 20. The plurality of air blowing areas 35 may correspond to the plurality of fixed grates 21, respectively.

[0035] For example, the gas supply unit 30 has an air source 31, an air duct 32, and a plurality of valves 34. The air source 31 pressurizes and delivers an oxygen-containing gas using, for example, a blower. The air duct 32 guides the oxygen-containing gas pressurized by the air source 31 to a plurality of sub-air ducts 33. For example, the air duct 32 branches into a plurality of sub-air ducts 33, and the sub-air ducts 33 are connected to a plurality of air delivery areas 35, respectively.

[0036] The plurality of valves 34 adjust the flow rate of the oxygen-containing gas from the air blowing source 31 to the plurality of air blowing areas 35. For example, the plurality of valves 34 are provided in the plurality of sub-air blowing ducts 33, respectively, and adjust the opening degree of the plurality of sub-air blowing ducts 33, respectively.

[0037] The oxygen-containing gas sent by the gas supply unit 30 continues to burn the waste on the conveying unit 20. Through combustion, the waste turns into incineration ash as it moves in the conveying direction D1.

[0038] The cooling device 3 cools the incineration ash produced in the incinerator 2. For example, the cooling device 3 is configured to execute a cooling procedure including storing the incineration ash in a storage section so as to block the incineration ash discharge outlet, blowing cooling gas into the incineration ash in the storage section from one or more blowing holes separate from the discharge outlet, and discharging the incineration ash AS from the storage section to the discharge outlet.

[0039] For example, the cooling device 3 includes a chute 40, a cooling gas blowing section 50, and a discharge section 60. The chute 40 protrudes downward from the furnace body 10 and receives the incineration ash AS sent out from the incineration ash receiving section 12.

[0040] For example, the chute 40 has a peripheral wall 41, a bottom 42, and a discharge port 43. The peripheral wall 41 has a cylindrical shape that surrounds the incineration ash receiving section 12 and protrudes downward from the furnace body 10. The bottom 42 closes the lower end of the peripheral wall 41 and supports the incineration ash AS sent from the incineration ash receiving section 12 into the peripheral wall 41. The discharge port 43 is formed in the bottom 42 at the lower end (at and near the lower end) of the peripheral wall 41 so as to open to the side, and discharges the incineration ash AS from inside the peripheral wall 41.

[0041] In FIG. 1, the discharge outlet 43 opens in the opposite direction D2 to the conveying direction D1, but the opening direction of the discharge outlet 43 is not necessarily limited to the opposite direction D2. For example, the discharge outlet 43 may open in the conveying direction D1, or in a direction between the conveying direction D1 and the opposite direction D2. The lower part of the chute 40 forms a storage section 45 for the incineration ash AS so as to block the discharge outlet 43. For example, the discharge outlet 43 can be blocked by the incineration ash AS accumulated on the bottom 42 within the peripheral wall 41. The discharge outlet 43 opens laterally at the lower part of the storage section 45.

[0042] The cooling device 3 may further include a discharge pipe 44. The discharge pipe 44 has a cylindrical shape surrounding the discharge outlet 43 and protrudes from the peripheral wall 41 toward the opening of the discharge outlet 43. The lower end of the discharge outlet 43 may be in contact with the bottom surface of the chute 40 (the upper surface of the bottom 42), or the bottom surface of the chute 40 and the bottom surface of the discharge pipe 44 may be flush with each other.

[0043] The cooling gas blowing unit 50 blows cooling gas into the incineration ash AS in the storage unit 45 through one or more blowing holes 51 located away from the discharge outlet 43. The one or more blowing holes 51 may be located away from the discharge outlet 43 in the conveying direction D1, or may be located above the discharge outlet 43. The discharge unit 60 is provided in the storage unit 45 and discharges the incineration ash AS from the storage unit 45 to the discharge outlet 43.

[0044] With the cooling device 3 configured in this manner, cooling gas (e.g., air) is blown into one or more blowing holes 51 located away from the discharge port 43, allowing the incineration ash AS to be cooled before reaching the discharge port 43. The incineration ash AS stored in the storage section 45 prevents the inflow of cooling gas from the discharge port 43 into the incinerator 2, thereby minimizing the impact of excess cooling gas on incineration in the incinerator 2. The blown cooling gas spreads within the storage section 45 due to the resistance of the stored incineration ash AS, allowing the incineration ash AS to be continuously cooled over a wide area while it is retained in the storage section 45. This allows the incineration ash AS to be cooled significantly before discharge without relying on liquid evaporation. Therefore, the incineration ash AS can be cooled and discharged without humidifying it.

[0045] The discharge section 60 may be configured to repeatedly push the incineration ash AS from the lower part of the storage section 45 toward the discharge port 43. This makes it easy to maintain the storage of the incineration ash AS in the storage section 45 and to continuously discharge the incineration ash AS at the same time.

[0046] For example, the discharge section 60 has a pusher 61 and a drive device 62. The pusher 61 is arranged on the bottom part 42 within the peripheral wall 41. The drive device 62 moves the pusher 61 forward or backward toward the discharge outlet 43 by an electric motor or a hydraulic cylinder. When the pusher 61 moves forward toward the discharge outlet 43, it pushes the incineration ash AS toward the discharge outlet 43. For example, when the discharge outlet 43 opens in the opposite direction D2, the drive device 62 moves the pusher 61 back and forth in the opposite direction D2 and the conveying direction D1.

[0047] The cooling gas blowing unit 50 may be configured to blow a portion of the oxygen-containing gas from the gas supply unit 30 into the storage unit 45 as a cooling gas. For example, the cooling gas blowing unit 50 may be configured to blow a portion of the oxygen-containing gas introduced by the air blower 32 into the storage unit 45 as a cooling gas. The cooling gas blowing unit 50 may be configured to blow 5% or less of the oxygen-containing gas from the gas supply unit 30 into the storage unit 45. This can further reduce the effect of the cooling gas on incineration in the incinerator 2.

[0048] For example, the cooling gas blowing unit 50 has one or more air ducts 52 and one or more valves 53. The one or more air ducts 52 branch off from the air duct 32 and are connected to one or more blowing holes 51, respectively. The one or more valves 53 adjust the flow rate of the oxygen-containing gas from the air duct 32 to one or more blowing holes 51, respectively. For example, the one or more valves 53 are provided in the one or more air ducts 52, respectively, and adjust the opening degree of the one or more air ducts 52, respectively.

[0049] The cooling device 3 may have, as one or more blowing holes 51, a plurality of blowing holes 51 formed in the peripheral wall 41 of the storage section 45 at a position away from the discharge port 43. The cooling gas blowing section 50 may be configured to blow cooling gas into the incineration ash AS in the storage section 45 from the plurality of blowing holes 51. This allows the incineration ash to be cooled more efficiently. Each of the plurality of blowing holes 51 may be located above the discharge port 43.

[0050] The peripheral wall 41 may have a rectangular cylindrical shape and may include a pair of side walls 46, 47 along a horizontal extension direction D4 that intersects (e.g., is perpendicular to) the opening direction of the discharge port 43. The side wall 46 faces the opposite direction D2, and the side wall 47 faces the conveying direction D1. The multiple blowing holes 51 may include two or more blowing holes 51 formed in the side wall 46 or the side wall 47 so as to be aligned along the extension direction D4.

[0051] For example, as shown in Figure 2, the plurality of blowing holes 51 may include two or more blowing holes 51 formed in the side wall 46 so as to be aligned along the extension direction D4. This allows the incineration ash AS to be cooled more efficiently.

[0052] The multiple blowing holes 51 may include two or more blowing holes 51 located at different heights. By multi-stage cooling in which cooling gas is further supplied to the incineration ash AS that has already been cooled by the supply of cooling gas, the incineration ash AS can be cooled more efficiently.

[0053] For example, as shown in Fig. 3, the plurality of air intake holes 51 may include two or more air intake holes 51 at each of a plurality of different heights. As an example, Fig. 3 illustrates a plurality of air intake holes 51 formed in the side wall 46 so as to be arranged in a staggered pattern along the extension direction D4.

[0054] As shown in Fig. 4, the multiple blowing holes 51 may include a pair of blowing holes 51A, 51B formed in a pair of side walls 46, 47, respectively. The cooling gas blowing unit 50 may be configured to blow cooling gas into the incineration ash AS in the storage unit 45 from each of the pair of blowing holes 51A, 51B. For example, the cooling gas blowing unit 50 may have an air pipe 52 and a valve 53 for each of the pair of blowing holes 51A, 51B. This allows the incineration ash AS to be cooled more efficiently.

[0055] A pair of blowing holes 51A, 51B may be formed at the same height as each other, or at different heights from each other. The multiple blowing holes 51 may include multiple blowing holes 51A formed in side wall 46 and multiple blowing holes 51B formed in side wall 47. The multiple blowing holes 51A may include two or more blowing holes 51A located at different heights from each other, and the multiple blowing holes 51B may include two or more blowing holes 51B located at different heights from each other.

[0056] The cooling device 3 may further include a control device 100. The control device 100 controls the discharge unit 60 to adjust the storage height of the incineration ash AS in the storage unit 45, and controls the cooling gas blowing unit 50 to adjust the amount of cooling gas blown into the storage unit 45 from the blowing holes 51. For example, the control device 100 adjusts the opening degree of the air duct 52 using the valve 53 based on feedback information from the flow rate detection unit 54, for example, so as to adjust the amount of cooling gas blown into the storage unit 45 from the blowing holes 51. When the cooling gas blowing unit 50 has an air duct 52 and a valve 53 for each of a pair of blowing holes 51A, 51B, the control device 100 may individually adjust the valve 53 corresponding to the blowing hole 51A and the valve 53 corresponding to the blowing hole 51B.

[0057] For example, the control device 100 may control the discharge unit 60 so as to set the storage height to or above a target height H1 above the discharge outlet 43 and one or more blowing holes 51. The control device 100 may also control the cooling gas blowing unit 50 so as to link the amount of cooling gas blown into the storage unit 45 with the storage height. For example, the cooling device 3 further includes a level sensor 120. The level sensor 120 generates an electrical signal that indicates the storage height of the incineration ash AS in the storage unit 45.

[0058] For example, the level sensor 120 has one or more object sensors 121. Each of the one or more object sensors 121 detects the presence or absence of incineration ash AS (presence or absence of accumulated incineration ash AS) using a capacitance method, an infrared method, or the like. Based on the detection results of the one or more object sensors 121, it is possible to detect at least whether the storage height of the incineration ash AS in the storage unit 45 exceeds the installation height of the one or more object sensors 121. The storage height of the incineration ash AS in the storage unit 45 means the height of the upper surface of the incineration ash AS stored in the storage unit 45.

[0059] The level sensor 120 may have a plurality of object sensors 121 provided at different heights as the one or more object sensors 121. For example, the level sensor 120 may have an object sensor 121A formed at the above-mentioned target height H1 and an object sensor 121B formed at an upper limit height H2 that is higher than the target height H1. The level sensor 120 may have two or more object sensors 121A at the target height H1, and may have two or more object sensors 121B at the upper limit height H2.

[0060] The one or more blowing holes 51 may be formed at a height between the upper end of the discharge port 43 and the target height H1, closer to the upper end of the discharge port 43. For example, in the vertical direction, the distance from the upper end of the discharge port 43 to the lowest blowing hole 51 among the one or more blowing holes 51 may be shorter than the distance from the highest blowing hole 51 among the one or more blowing holes 51 to the target height H1.

[0061] For example, the upper end of the discharge port 43 is located at a height of 200 to 1000 mm from the bottom surface of the chute 40. One or more blowing holes 51 are formed at a height of 500 to 1500 mm from the bottom surface of the chute 40. The target height H1 and the upper limit height H2 are set in the range of 800 to 2700 mm from the bottom surface of the chute 40.

[0062] The control device 100 has, as functional components (hereinafter referred to as "functional blocks"), a discharge control unit 111 and a blow-in control unit 112. The discharge control unit 111 controls the discharge unit 60 based on the detection result of the level sensor 120 so as to make the storage height equal to or greater than the target height H1. The discharge control unit 111 may also control the discharge unit 60 based on the detection result of the level sensor 120 so as to make the storage height equal to or greater than the target height H1 and equal to or less than the upper limit height H2.

[0063] For example, when the storage height is below the target height H1 (when the object sensor 121A does not detect the incineration ash AS), the control device 100 reduces the discharge speed of the incineration ash AS by the discharge unit 60, and when the storage height is above the upper limit height H2 (when the object sensor 121B detects the incineration ash AS), the control device 100 increases the discharge speed of the incineration ash AS by the discharge unit 60. The discharge speed is the amount (e.g., volume) of incineration ash discharged from the discharge outlet 43 per unit time by the reciprocating movement of the pusher 61. To change the discharge speed, the discharge control unit 111 may change the displacement speed of the pusher 61 in one reciprocating movement, the displacement stroke of the pusher 61 in one reciprocating movement, or the number of reciprocating movements of the pusher 61 per unit time. To change the discharge speed, the discharge control unit 111 may change two or more of the displacement speed, the displacement stroke, and the number of reciprocating movements.

[0064] The level sensor 120 may be configured to generate an electrical signal that represents a value correlated to (e.g., proportional to) the storage height. For example, the level sensor 120 may have a distance measurement sensor that generates an electrical signal that represents the distance (e.g., the vertical distance) to the top surface of the incineration ash AS deposited in the storage unit 45. In this case, the discharge control unit 111 may calculate a change amount by performing a proportional operation, a proportional-integral operation, or a proportional-integral-differential operation on the deviation between the storage height and the target height H1, and control the discharge unit 60 to change the discharge speed by the calculated change amount.

[0065] The blowing control unit 112 controls the cooling gas blowing unit 50 based on the level sensor 120 so that the amount of cooling gas blown into the storage unit 45 is linked to the storage height. For example, the blowing control unit 112 may control the cooling gas blowing unit 50 so that the blowing amount decreases as the storage height increases and increases as the storage height decreases.

[0066] The higher the storage height, the longer the residence time of the incineration ash AS in the storage section 45 (the time from when it is deposited in the storage section 45 until it is discharged from the discharge port 43). As the residence time increases, the temperature of the incineration ash AS (hereinafter referred to as "incineration ash temperature") decreases significantly during storage, reducing the need for injecting cooling gas. On the other hand, the lower the storage height, the shorter the residence time of the incineration ash AS in the storage section 45. As the residence time decreases, the decrease in the temperature of the incineration ash during storage decreases, reducing the need for injecting cooling gas. For this reason, the amount of cooling gas injected can be adjusted to an appropriate amount by reducing the injection amount as the storage height increases and increasing the injection amount as the storage height decreases.

[0067] For example, the blowing control unit 112 may set the blowing amount to a first amount when the storage height is below the target height H1 (when incineration ash AS is not detected by the object sensor 121A), set the blowing amount to a second amount less than the first amount when the storage height exceeds the target height H1 and falls below the upper limit height H2 (when incineration ash AS is detected by the object sensor 121A and incineration ash AS is not detected by the object sensor 121B), and set the blowing amount to a third amount less than the second amount when the storage height exceeds the upper limit height H2 (when incineration ash AS is detected by the object sensor 121B).

[0068] When the level sensor 120 generates an electrical signal correlated to the storage height, the blowing control unit 112 may perform a proportional operation, a proportional-integral operation, or a proportional-integral-differential operation on the deviation between the storage height and the target height H1 to calculate the amount of change, and control the cooling gas blowing unit 50 so that the valve 53 changes the opening of the air supply pipe 52 by the calculated amount of change.

[0069] The control device 100 may control the cooling gas blowing unit 50 so that the temperature of the incineration ash discharged from the discharge port 43 is equal to or lower than a target temperature. The control device 100 may also control the discharge unit 60 so that the storage height is linked to the temperature of the incineration ash discharged from the discharge port 43. For example, the cooling device 3 further includes a temperature sensor 131. The temperature sensor 131 detects the temperature of the incineration ash in the storage unit 45.

[0070] Examples of the temperature sensor 131 include thermocouple, thermistor, and infrared temperature sensors. The temperature sensor 131 may be arranged in the flow path of the incineration ash AS in the storage section 45 so as to detect the temperature of the incineration ash upstream of one or more incineration system 1 blowing holes 51. For example, the temperature sensor 131 may be arranged above one or more incineration system 1 blowing holes 51. The temperature sensor 131 may also be arranged so as to detect the temperature of the incineration ash downstream of one or more incineration system 1 blowing holes 51.

[0071] The blowing control unit 112 may control the cooling gas blowing unit 50 based on the detection result of the temperature sensor 131 so as to keep the temperature of the incineration ash discharged from the discharge port 43 at or below a target temperature. For example, the blowing control unit 112 may control the cooling gas blowing unit 50 so as to increase the amount of cooling gas blown when the detection result of the temperature sensor 131 is higher than the target temperature, and to decrease the amount of cooling gas blown when the detection result of the temperature sensor 131 is lower than the target temperature. The blowing control unit 112 may calculate a change amount by performing a proportional operation, a proportional-integral operation, or a proportional-integral-differential operation on the deviation between the detection result of the temperature sensor 131 and the target temperature, and control the cooling gas blowing unit 50 so as to change the opening of the air supply pipe 52 by the valve 53 by the calculated change amount.

[0072] The blowing control unit 112 may control the cooling gas blowing unit 50 so as to maintain the amount of cooling gas blown into the storage unit 45 at or above a predetermined lower limit. For example, the blowing control unit 112 may control the cooling gas blowing unit 50 so as to maintain the opening of the blower pipe 52 by the valve 53 at or above a predetermined lower limit. The lower limit may be determined by the flow rate per unit weight of ash. For example, the blowing control unit 112 may control the cooling gas blowing unit 50 so that the amount of cooling gas blown into the storage unit 45 is 0.3 to 1.8 normal cubic meters per unit weight of ash (for example, 1 kg).

[0073] The discharge control unit 111 may control the discharge unit 60 based on the detection results of the temperature sensor 131 so that the storage height is linked to the temperature of the incineration ash discharged from the discharge port 43. For example, the discharge control unit 111 may control the discharge unit 60 so that the storage height increases as the incineration ash temperature in the storage unit 45 increases, and decreases as the incineration ash temperature in the storage unit 45 decreases. By increasing the storage height as the incineration ash temperature in the storage unit 45 increases, the retention time (cooling time) of the incineration ash AS becomes longer, and further temperature stabilization is possible. By decreasing the storage height as the incineration ash temperature decreases, excessive storage of the incineration ash AS in the storage unit 45 is prevented.

[0074] For example, when the detection result by the temperature sensor 131 is higher than the target temperature, the discharge control unit 111 may control the discharge unit 60 to increase the storage height compared to when the detection result by the temperature sensor 131 is lower than the target temperature. The discharge control unit 111 may calculate a change amount by performing a proportional operation, a proportional-integral operation, or a proportional-integral-differential operation on the deviation between the detection result by the temperature sensor 131 and the target temperature, and control the discharge unit 60 to change the storage height by the calculated change amount.

[0075] For example, the discharge control unit 111 may control the discharge unit 60 so that the storage height increases as the incineration ash temperature increases and decreases as the incineration ash temperature decreases, as long as the storage height does not fall below the target height H1. While linking the storage height to the incineration ash temperature, it is possible to prevent the accumulation of incineration ash AS in the storage unit 45 from becoming too small.

[0076] The blowing control unit 112 may control the cooling gas blowing unit 50 based on the storage height in combination with controlling the cooling gas blowing unit 50 based on the incineration ash temperature. For example, the blowing control unit 112 may control the cooling gas blowing unit 50 based on the incineration ash temperature when the incineration ash temperature is equal to or higher than a target temperature, and may control the cooling gas blowing unit 50 based on the storage height when the incineration ash temperature is lower than the target temperature.

[0077] The cooling device 3 may include a plurality of temperature sensors 131, 132. The blowing control unit 112 may control the cooling gas blowing unit 50 based on the detection results of the plurality of temperature sensors 131, 132. The discharge control unit 111 may control the discharge unit 60 based on the detection results of the plurality of temperature sensors 131, 132.

[0078] The temperature sensor 131 may be arranged to detect the temperature of the incineration ash upstream of one or more incineration system 1 inlet holes 51, and the temperature sensor 132 may be arranged to detect the temperature of the incineration ash downstream of one or more incineration system 1 inlet holes 51. For example, the temperature sensor 132 may be arranged to detect the temperature of the incineration ash near the discharge outlet 43.

[0079] The cooling device 3 may further include a seal damper 71. The seal damper 71 prevents gas from flowing into the storage section 45 from the discharge port 43. For example, the seal damper 71 is configured to block the opening 48 at the tip (the end farthest from the peripheral wall 41) of the discharge pipe 44. For example, the seal damper 71 expands to intersect with the opposite direction D2 and contacts the tip of the discharge pipe 44 from the opposite direction D2. As described above, the direction in which the discharge port 43 moves is not limited to the opposite direction D2, and therefore the direction in which the discharge pipe 44 corresponding to the discharge port 43 protrudes and opens is not limited to the opposite direction D2. For example, the discharge pipe 44 may protrude and open in a horizontal direction that intersects with the opposite direction D2. In this case, the seal damper 71 may be configured to block the opening 48 from the horizontal direction. Furthermore, the discharge pipe 44 may be bent downward. In this case, the seal damper 71 may be configured to block the opening 48 from below.

[0080] The seal damper 71 is rotatable on the discharge pipe 44 around a rotation axis 72 along the extension direction D4. This allows the incineration ash AS to be discharged from the tip of the discharge pipe 44. For example, the seal damper 71 is driven by a hydraulic cylinder or a motor to open and close the opening 48. When the seal damper 71 moves away from the tip of the discharge pipe 44 and opens the opening 48, the incineration ash AS is discharged from between the seal damper 71 and the tip of the discharge pipe 44.

[0081] The cooling device 3 may further include a conveyor 83 that transports the incineration ash AS discharged from the discharge port 43, and a secondary cooling unit 84 that air-cools the incineration ash AS on the conveyor 83. The incineration ash AS can be further cooled.

[0082] For example, the cooling device 3 further includes a second chute 81, a conveyor casing 82, a conveyor 83, and a secondary cooling unit 84. The second chute 81 is connected to the tip of the discharge pipe 44 and receives the incineration ash AS discharged from the opening 48. For example, the second chute 81 has a cylindrical shape and protrudes downward from a position connected to the tip of the discharge pipe 44. The above-mentioned seal damper 71 may be provided inside the second chute 81. In addition to the seal damper 71 that opens and closes the tip of the discharge pipe 44, the cooling device 3 may further include a seal damper that opens and closes the tip of the second chute 81.

[0083] The conveyor casing 82 is connected to the lower end of the second chute 81 and receives the incineration ash AS guided downward by the second chute 81. For example, the conveyor casing 82 has a cylindrical shape and extends horizontally. The conveyor 83 is provided inside the conveyor casing 82. The conveyor 83 is, for example, a belt conveyor, and transports the incineration ash AS sent into the conveyor casing 82 along the conveyor casing 82.

[0084] The secondary cooling section 84 forms an airflow inside the conveyor casing 82 to air-cool the incineration ash AS transported by the conveyor 83. For example, the secondary cooling section 84 has a blower 85 formed at one end of the conveyor casing 82 and an inlet 86 formed at the other end of the conveyor casing 82. The blower 85 exhausts gas from inside the conveyor casing 82. The inlet 86 takes in gas into the conveyor casing 82. As a result, an airflow is formed inside the conveyor casing 82 from the inlet 86 toward the blower 85, and the incineration ash AS is air-cooled by this airflow.

[0085] Fig. 5 is a block diagram illustrating an example of a hardware configuration of the control device 100. As shown in Fig. 5, the control device 100 includes a circuit 190. The circuit 190 includes a processor 191, a memory 192, a storage 193, and an input / output port 194.

[0086] The storage 193 includes, for example, one or more nonvolatile storage media. The nonvolatile storage medium includes one or more storage devices. Examples of the one or more storage devices include a hard disk drive, a solid state drive, and a flash memory. The nonvolatile storage medium may include a portable storage medium such as an optical disk. The storage 193 stores a program that causes the control device 100 to control the cooling gas blowing unit 50 and the exhaust unit 60 as described above. For example, the storage 193 stores a program that causes the control device 100 to configure the exhaust control unit 111 and the blowing control unit 112.

[0087] The memory 192 includes one or more volatile storage media. The volatile storage media includes one or more memory devices. An example of the one or more memory devices is a random access memory. The memory 192 temporarily stores a program loaded from the storage 193. The processor 191 includes one or more arithmetic devices. An example of the arithmetic device is a CPU (Central Processing Unit) or a GPU (Graphics Processing Unit). The processor 191 executes the program loaded in the memory 192, thereby configuring the discharge control unit 111 and the blowing control unit 112 in the control device 100. The processor 191 may temporarily store the calculation results in the memory 192.

[0088] The input / output port 194 inputs and outputs control signals to and from the level sensor 120, the plurality of temperature sensors 131 and 132, the discharge unit 60, the valve 53, and the like, based on a request from the processor 191.

[0089] [Control procedure] The control device 100 executes a cooling procedure in order to cause the cooling device 3 to execute the cooling procedure, which includes storing the incineration ash AS in the storage section 45 so as to block the discharge outlet 43, blowing cooling gas into the incineration ash AS in the storage section 45 through one or more blowing holes 51 separate from the discharge outlet 43, and discharging the incineration ash AS from the storage section 45 to the discharge outlet 43. The following are examples of control procedures that the control device 100 executes: a discharge control procedure based on the storage height; a blowing control procedure based on the incineration ash temperature; a blowing control procedure based on the storage height; and a discharge control procedure based on the incineration ash temperature. These procedures may be executed individually or in combination.

[0090] (Discharge control procedure based on storage height) As shown in FIG. 6, the control device 100 first executes step S01. In step S01, the discharge control unit 111 checks whether the storage height exceeds the upper limit height H2. If it is determined in step S01 that the storage height is equal to or less than the upper limit height H2, the control device 100 executes step S02. In step S02, the discharge control unit 111 checks whether the storage height is below the target height H1. If it is determined in step S02 that the storage height is equal to or greater than the target height H1, the control device 100 returns the process to step S01.

[0091] If it is determined in step S01 that the storage height exceeds the upper limit height H2, the control device 100 executes step S03. In step S03, the discharge control unit 111 controls the discharge unit 60 to increase the discharge speed. If it is determined in step S02 that the storage height is below the target height H1, the control device 100 executes step S04. In step S04, the discharge control unit 111 controls the discharge unit 60 to decrease the discharge speed. After executing step S03 or step S04, the control device 100 returns the process to step S01. The control device 100 repeatedly executes the above process.

[0092] (Injection control procedure based on incineration ash temperature) As shown in FIG. 7, the control device 100 first executes step S11. In step S11, the blowing control unit 112 checks whether the incineration ash temperature exceeds the target temperature. If it is determined in step S11 that the incineration ash temperature is equal to or lower than the target temperature, the control device 100 executes step S12. In step S12, the blowing control unit 112 checks whether the incineration ash temperature is lower than the target temperature. If it is determined in step S12 that the incineration ash temperature is equal to or higher than the target temperature, the control device 100 returns the process to step S11.

[0093] If it is determined in step S11 that the incineration ash temperature exceeds the target temperature, the control device 100 executes step S13. In step S13, the discharge control unit 111 controls the cooling gas blowing unit 50 to increase the amount of cooling gas blown from one or more blowing holes 51. If it is determined in step S12 that the incineration ash temperature is below the target temperature, the control device 100 executes step S14. In step S14, the discharge control unit 111 controls the cooling gas blowing unit 50 to reduce the blowing amount. After executing step S13 or step S14, the control device 100 returns the process to step S11. The control device 100 repeatedly executes the above process.

[0094] (Injection control procedure based on reservoir height) As shown in FIG. 8, the control device 100 first executes step S21. In step S21, the blowing control unit 112 checks whether the storage height exceeds the upper limit height H2. If it is determined in step S21 that the storage height is equal to or less than the upper limit height H2, the control device 100 executes step S22. In step S22, the blowing control unit 112 checks whether the storage height is below the target height H1. If it is determined in step S22 that the storage height is equal to or greater than the target height H1, the control device 100 returns the process to step S21.

[0095] If it is determined in step S21 that the storage height exceeds the upper limit height H2, the control device 100 executes step S23. In step S23, the discharge control unit 111 controls the cooling gas blowing unit 50 to reduce the amount of cooling gas blown from one or more blowing holes 51. If it is determined in step S22 that the storage height is below the target height H1, the control device 100 executes step S24. In step S24, the discharge control unit 111 controls the cooling gas blowing unit 50 to increase the blowing amount. After executing step S23 or step S24, the control device 100 returns the process to step S21. The control device 100 repeatedly executes the above process.

[0096] (Emission control procedure based on incineration ash temperature) As shown in Figure 9, the control device 100 first executes step S31. In step S31, the discharge control unit 111 checks whether the incineration ash temperature exceeds the target temperature. If it is determined in step S31 that the incineration ash temperature is equal to or lower than the target temperature, the control device 100 executes step S32. In step S32, the discharge control unit 111 checks whether the incineration ash temperature is lower than the target temperature. If it is determined in step S32 that the incineration ash temperature is equal to or higher than the target temperature, the control device 100 returns the process to step S31.

[0097] If it is determined in step S31 that the incineration ash temperature exceeds the target temperature, the control device 100 executes step S33. In step S33, the discharge control unit 111 controls the discharge unit 60 to reduce the discharge rate. If it is determined in step S32 that the incineration ash temperature is below the target temperature, the control device 100 executes step S34. In step S34, the discharge control unit 111 controls the discharge unit 60 to increase the discharge rate. After executing step S33 or step S34, the control device 100 returns the process to step S31. The control device 100 repeatedly executes the above process.

[0098] 〔summary〕 The above-described exemplary embodiment includes the following configurations. (1) A cooling device 3 that cools incineration ash generated in an incinerator 2, comprising an incineration ash discharge outlet 43, a storage section 45 that stores the incineration ash so as to block the discharge outlet 43, a cooling gas blowing section 50 that blows cooling gas into the incineration ash in the storage section 45 from one or more blowing holes 51 away from the discharge outlet 43, and a discharge section 60 that is provided in the storage section 45 and discharges the incineration ash from the storage section 45 to the discharge outlet 43. Since cooling gas (e.g., air) is blown into one or more blowing holes 51 located away from the discharge port 43, the incineration ash can be cooled before reaching the discharge port 43. The incineration ash stored in the storage section 45 prevents the inflow of cooling gas from the discharge port into the incinerator, thereby minimizing the impact of the cooling gas on incineration in the incinerator 2. The blown cooling gas spreads within the storage section 45 due to the resistance of the stored incineration ash, so the incineration ash is continuously cooled over a wide area while it is retained in the storage section 45. Therefore, the cooling of the incineration ash can be significantly advanced before discharge without relying on the evaporation of liquid. Therefore, the incineration ash can be cooled and discharged without humidifying it.

[0099] (2) The cooling device 3 described in (1) above, wherein the discharge outlet 43 opens laterally at the bottom of the storage section 45, and the discharge section 60 is configured to repeatedly push incineration ash from the bottom of the storage section 45 toward the discharge outlet 43. It is possible to easily maintain the storage of incineration ash in the storage section 45 while continuously discharging the incineration ash.

[0100] (3) The cooling device 3 described in (2) has one or more blowing holes 51 formed in the peripheral wall 41 of the storage section 45 at a position away from the discharge outlet 43, and the cooling gas blowing section 50 blows cooling gas into the incineration ash in the storage section 45 from the multiple blowing holes 51. The incineration ash can be cooled more efficiently.

[0101] (4) A cooling device 3 described in (3), wherein the peripheral wall 41 includes a side wall 46 along a horizontal extension direction D4 that intersects with the opening direction of the discharge outlet 43, and the plurality of blowing holes 51 include two or more blowing holes 51 formed in the side wall 46 so as to be aligned along the extension direction D4. The incineration ash can be cooled more efficiently.

[0102] (5) A cooling device 3 described in (3) or (4), in which the peripheral wall 41 includes a pair of side walls 46, 47 facing each other in the opening direction of the discharge port 43, and the multiple blowing holes 51 include a pair of blowing holes 51A, 51B formed in the pair of side walls 46, 47, respectively. The incineration ash can be cooled more efficiently.

[0103] (6) The cooling device 3 according to any one of (3) to (5), wherein the plurality of blowing holes 51 includes two or more blowing holes 51 located at different heights. The incineration ash can be cooled more efficiently.

[0104] (7) The cooling device 3 described in any one of (1) to (6) further includes a level sensor 120 that detects the storage height of the incineration ash in the storage section 45, and a discharge control section 111 that controls the discharge section 60 based on the detection result of the level sensor 120 so that the storage height is equal to or higher than a target height above the discharge outlet 43 and one or more blow-in holes 51. The temperature stability of the incineration ash can be improved.

[0105] (8) The cooling device 3 described in any one of (1) to (7) further comprises a level sensor 120 that detects the storage height of the incineration ash in the storage section 45, and an injection control section 112 that controls the cooling gas injection section 50 based on the level sensor 120 so as to link the amount of cooling gas injected into the storage section 45 to the storage height. The temperature stability of the incineration ash can be improved.

[0106] (9) The cooling device 3 described in any one of (1) to (8) further includes a temperature sensor 131 that detects the temperature of the incineration ash in the storage section 45, and an injection control section 112 that controls the cooling gas injection section 50 based on the detection result of the temperature sensor 131 so that the temperature of the incineration ash discharged from the discharge outlet 43 is below a target temperature. The temperature stability of the incineration ash can be improved.

[0107] (10) The cooling device (3) according to (8) or (9), wherein the blowing control unit (112) maintains the amount of cooling gas blown into the storage unit (45) at or above a predetermined lower limit. It is possible to prevent incineration ash from flowing into the inlet.

[0108] (11) The cooling device 3 described in any one of (1) to (10) further comprises a temperature sensor 131 that detects the temperature of the incineration ash in the storage section 45, and a discharge control section 111 that controls the discharge section 60 based on the detection result of the temperature sensor 131 so that the storage height of the incineration ash in the storage section 45 is linked to the temperature of the incineration ash discharged from the discharge outlet 43. The temperature stability of the incineration ash can be improved.

[0109] (12) A cooling device 3 according to any one of (1) to (11), further comprising a gas supply unit 30 that supplies oxygen-containing gas to the incinerator 2, and the cooling gas blowing unit 50 is configured to blow 5% or less of the oxygen-containing gas from the gas supply unit 30 into the storage unit 45 as cooling gas. The influence of the cooling gas on the incineration in the incinerator 2 can be further reduced.

[0110] (13) The cooling device 3 according to any one of (1) to (12), further comprising a seal damper 71 that prevents gas from flowing into the storage portion 45 from the outlet 43. In the early stage when incineration ash is not sufficiently stored in the storage section 45, the inflow of gas from the exhaust port into the incinerator 2 can be suppressed.

[0111] (14) The cooling device 3 according to any one of (1) to (13), further comprising a conveyor for transporting the incineration ash discharged from the discharge port 43, and a secondary cooling section 84 for air-cooling the incineration ash on the conveyor. The incineration ash can be further cooled.

[0112] (15) An incineration apparatus comprising a cooling device 3 according to any one of (1) to (14) and an incinerator 2, wherein the incinerator 2 is a stoker-type incinerator that incinerates waste on multiple stages of grates while sequentially transferring the waste to the multiple stages of grates. By combining a stoker-type incinerator suitable for continuous incineration with the above-mentioned cooling device 3, it is possible to more easily maintain the storage of incineration ash in the storage section 45 and the continuous discharge of incineration ash.

[0113] (16) A method for cooling incineration ash produced in an incinerator 2, comprising storing the incineration ash in a storage section 45 so as to block the incineration ash discharge outlet 43, blowing cooling gas into the incineration ash in the storage section 45 from one or more inlet holes 51 separate from the discharge outlet 43, and discharging the incineration ash from the storage section 45 to the discharge outlet 43.

[0114] Although the embodiments have been described above, the present invention is not necessarily limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present invention. [Explanation of symbols]

[0115] 2...incinerator, 30...gas supply section, 3...cooling device, 41...peripheral wall, 43...discharge outlet, 45...storage section, 50...cooling gas blowing section, 51...blowing hole, 60...discharge section, D4...extension direction, 46...side wall, 46, 47...pair of side walls, 51A, 51B...pair of blowing holes, 120...level sensor, 111...discharge control section, 112...blowing control section, 131...temperature sensor, 71...seal damper, 83...conveyor, 84...secondary cooling section.

Claims

1. An apparatus for cooling incineration ash produced in an incinerator, The incineration ash discharge port; A storage section that stores the incineration ash so as to block the discharge outlet; A cooling gas blowing unit that blows cooling gas into the incineration ash in the storage unit from one or more blowing holes away from the discharge port; A discharge section provided in the storage section and discharging the incineration ash from the storage section to the discharge port; A cooling device comprising:

2. The outlet opens laterally at a lower portion within the storage portion, The discharge section is configured to repeatedly push the incineration ash from a lower portion of the storage section toward the discharge outlet. The cooling device according to claim 1.

3. The one or more blowing holes include a plurality of blowing holes formed in the peripheral wall of the storage portion at positions away from the discharge port, The cooling gas blowing unit blows the cooling gas into the incineration ash in the storage unit through the plurality of blowing holes. The cooling device according to claim 2.

4. the peripheral wall includes a side wall that intersects with the opening direction of the discharge port, The plurality of blowing holes include two or more blowing holes arranged horizontally along the side wall. The cooling device according to claim 3.

5. the peripheral wall includes a pair of side walls facing each other in an opening direction of the discharge port, The plurality of blowing holes include a pair of blowing holes formed in each of the pair of side walls. The cooling device according to claim 3.

6. The plurality of blowing holes include two or more blowing holes located at different heights. The cooling device according to claim 3.

7. A level sensor that detects the storage height of the incineration ash in the storage section; a discharge control unit that controls the discharge unit based on the detection result of the level sensor so that the storage height is equal to or higher than a target height above the discharge outlet and the one or more blowing holes; Further comprising: The cooling device according to claim 1.

8. A level sensor that detects the storage height of the incineration ash in the storage section; a blowing control unit that controls the cooling gas blowing unit based on the level sensor so that the amount of the cooling gas blown into the storage unit is linked to the storage height; Further comprising: The cooling device according to claim 1.

9. A temperature sensor that detects the temperature of the incineration ash in the storage unit; A blowing control unit that controls the cooling gas blowing unit based on the detection result of the temperature sensor so that the temperature of the incineration ash discharged from the discharge port is equal to or lower than a target temperature; Further comprising: The cooling device according to claim 1.

10. The blowing control unit maintains the amount of the cooling gas blown into the storage unit at or above a predetermined lower limit value. The cooling device according to claim 8 or 9.

11. A temperature sensor that detects the temperature of the incineration ash in the storage unit; A discharge control unit that controls the discharge unit based on the detection result of the temperature sensor so that the storage height of the incineration ash in the storage unit is linked to the temperature of the incineration ash discharged from the discharge outlet; Further comprising: The cooling device according to claim 1.

12. Further provided is a gas supply unit that supplies an oxygen-containing gas to the incinerator; The cooling gas blowing unit is configured to blow 5% or less of the oxygen-containing gas from the gas supply unit into the storage unit as the cooling gas. The cooling device according to any one of claims 1 to 9.

13. Further provided is a seal damper that prevents gas from flowing into the storage portion from the outlet. The cooling device according to any one of claims 1 to 9.

14. A conveyor that transports the incineration ash discharged from the discharge port; A secondary cooling unit that air-cools the incineration ash on the conveyor; Further comprising: The cooling device according to any one of claims 1 to 9.

15. The cooling device according to any one of claims 1 to 9, The incinerator; Equipped with The incinerator is a stoker-type incinerator that incinerates waste on multiple stages of grates while sequentially transferring the waste to multiple stages of grates.

16. A method for cooling incineration ash produced in an incinerator, comprising: Storing the incineration ash in a storage section so as to block the incineration ash discharge port; Blowing cooling gas into the incineration ash in the storage unit from one or more blowing holes other than the discharge port; Discharging the incineration ash from the storage section to the discharge outlet; A cooling method comprising:

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