Incineration ash treatment apparatus and incineration ash treatment method

Abstract

To suppress elution of heavy metals from incineration ash in an incineration ash storage facility for storing incineration ash.SOLUTION: An incineration ash treatment apparatus includes: incineration ash storage means configured to store incineration ash obtained by incinerating waste; gripping means configured to be able to move the incineration ash; and control means for controlling the operation of the gripping means and storing the operation of the gripping means. The control means controls the gripping means so that the retention time which has elapsed from time point when the incineration ash stored in the incineration ash storage means was carried into the incineration ash storage means becomes a predetermined retention time.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an incineration ash treatment apparatus and an incineration ash treatment method. [Background technology]

[0002] For example, Patent Document 1 discloses an incineration ash treatment device that includes a water injection nozzle as a hydration means for adding water to the incineration ash so that it has a first moisture content, which makes the amount of heavy metals contained in the incineration ash less than a standard value, and an injection pipe as a drying means for drying the incineration ash that has been moistened by the water injection nozzle so that it has a second moisture content determined for the purpose of preventing the incineration ash from scattering. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-30121 Summary of the Invention [Problem to be solved by the invention]

[0004] Patent Document 1 proposes a method for adjusting the moisture content of ash to a desired level by a hydration process and a drying process. However, the above-mentioned prior art does not consider a method for managing ash in ash storage facilities such as ash pits that store ash such as incineration ash. As a result, it is extremely difficult to achieve the effect of suppressing the elution of heavy metals such as lead (Pb) that may elute from incineration ash.

[0005] In other words, because the moisture content and storage time of the incineration ash after adding water stored in the ash storage facility have not been considered, the main ash of the incineration ash dries out as the moisture evaporates from the main ash, making it difficult to suppress the elution of heavy metals.Therefore, there has been a need for a technology in incineration ash treatment equipment that can suppress the elution of heavy metals from incineration ash in ash storage facilities such as ash pits that store incineration ash.

[0006] The present invention has been made in view of the above, and its object is to provide an incineration ash treatment device and an incineration ash treatment method that can suppress the elution of heavy metals from incineration ash in an ash storage facility that stores incineration ash. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems and achieve the above-mentioned object, an incineration ash treatment device according to one embodiment of the present invention comprises an incineration ash storage means configured to be able to store incineration ash obtained by incinerating waste, a gripping means configured to be able to move the incineration ash, and a control means that controls the operation of the gripping means and stores the operation of the gripping means, and the control means controls the gripping means so that the retention time that has elapsed since the incineration ash stored in the incineration ash storage means was transported to the incineration ash storage means becomes a predetermined retention time.

[0008] In one aspect of the present invention, in the above invention, the incineration ash treatment device further comprises an atmosphere measurement means for measuring the atmospheric state around the incineration ash stored in the incineration ash storage means, and the control means derives the moisture content of the incineration ash stored in the incineration ash storage means based on the measured value of the atmospheric state obtained from the atmosphere measurement means, and derives the specified residence time based on the moisture content.

[0009] In one aspect of the incineration ash processing device of the present invention, in the above invention, the control means divides the incineration ash stored in the incineration ash storage means into a plurality of areas, and controls the gripping means to transport out the incineration ash stored in an area where the residence time of the incineration ash is equal to or longer than the predetermined residence time in each of the plurality of areas.

[0010] In this configuration of the incineration ash treatment device according to one embodiment of the present invention, the control means controls the movement of incineration ash in an area of ​​the plurality of areas where incineration ash has been stored for a residence time less than the predetermined residence time to the area from which the incineration ash has been discharged.

[0011] An incineration ash processing method according to one aspect of the present invention is an incineration ash processing method carried out in an incineration ash processing apparatus equipped with an incineration ash storage means configured to store incineration ash obtained by incinerating waste, a gripping means configured to move the incineration ash, and a control means that controls the operation of the gripping means and stores the operation of the gripping means, and controls the gripping means so that the residence time of the incineration ash stored in the incineration ash storage means, which has elapsed since it was brought into the incineration ash storage means, is a predetermined residence time.

[0012] In one aspect of the incineration ash processing method of the present invention, in the above invention, the incineration ash processing device further includes an atmosphere measurement means for measuring the atmospheric state around the incineration ash stored in the incineration ash storage means, and the control means derives the moisture content of the incineration ash stored in the incineration ash storage means based on the measured value of the atmospheric state obtained from the atmosphere measurement means, and derives the specified residence time based on the moisture content.

[0013] In one aspect of the incineration ash processing method of the present invention, in the above invention, the incineration ash stored in the incineration ash storage means is divided into a plurality of areas, and the gripping means is controlled so as to transport the incineration ash stored in an area where the residence time of the incineration ash is equal to or longer than the predetermined residence time in each of the plurality of areas.

[0014] In this configuration, the incineration ash processing method according to one embodiment of the present invention controls the movement of incineration ash in an area of ​​the plurality of areas where incineration ash has a residence time that is less than the predetermined residence time to the area from which the incineration ash has been removed. [Effects of the Invention]

[0015] According to the present invention, it is possible to suppress the elution of heavy metals from incineration ash in an ash storage facility that stores incineration ash. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a diagram showing an incineration ash treatment facility according to one embodiment of the present invention. [Figure 2] FIG. 2 is a flowchart illustrating the incineration ash treatment method according to one embodiment of the present invention. [Figure 3] FIG. 3 is a graph showing the residence time dependence of the amount of lead elution from incineration ash stored in an incineration ash treatment facility according to one embodiment of the present invention. [Figure 4A] FIG. 4A is a side view showing an incineration ash treatment facility according to a second modified example of one embodiment of the present invention. [Figure 4B] FIG. 4B is a top view showing an incineration ash treatment facility according to a second modified example of an embodiment of the present invention. [Figure 5] FIG. 5 is a diagram showing an example of carrying incineration ash from a conveyor to an ash pit according to a third modified example of an embodiment of the present invention. [Figure 6] FIG. 6 is a diagram showing an example of carrying incineration ash from a conveyor to an ash pit according to a fourth modified example of an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In all the drawings of the embodiment below, the same or corresponding parts are designated by the same reference numerals. Furthermore, the present invention is not limited to the embodiment described below.

[0018] First, to facilitate understanding of the present invention, the inventors of the present invention will discuss the extensive research they conducted to solve the problems of the prior art. Specifically, the inventors first conducted extensive research into the phenomenon of heavy metals such as lead (Pb) leaching from incineration ash in ash pits, which serve as incineration ash storage means for storing bottom ash. According to the inventors' findings, it is desirable to add water to the bottom ash to achieve a predetermined moisture content in order to suppress the leaching of heavy metals such as Pb contained in the bottom ash of incineration ash. The inventors conducted experiments to determine the moisture content and found that the predetermined moisture content is typically between 10% and 30%, and preferably between 15% and 25%.

[0019] However, the prior art has not explored the moisture content of incineration ash that is desirable for suppressing the elution of heavy metals, nor the retention time (retention time) for maintaining this moisture content. This may result in insufficient suppression of the elution of heavy metals, such as lead (Pb). Therefore, the present inventors conducted experiments and studies on the elution characteristics of heavy metals from incineration ash stored in an ash pit. As a result, the present inventors found that in order to suppress the elution of heavy metals in an ash pit, it is desirable to ensure a retention time (also known as a retention time) of at least four days after adding water to the bottom ash stored in the ash pit. The retention time can also be approximated as the time from when the bottom ash is dumped into the ash pit until it is removed. Therefore, the present inventors further explored a method for continuously storing incineration ash in an ash pit for at least a predetermined retention time, for example, at least four days, after adding water.

[0020] In the prior art, even if an attempt is made to ensure a retention time of four days or more from the time water is added to the incineration ash until the incineration ash is removed, the volume of the ash pit is not designed large enough to ensure such a long retention time. Therefore, the inventors conducted further research and came up with a control method to ensure a retention time of four days or more by using an ash crane installed in the ash pit to grasp the incineration ash, move it, and then release it (hereinafter referred to as moving the incineration ash) in order to ensure a retention time of four days or more to keep the incineration ash at a specified moisture content.

[0021] In this regard, in the prior art, the control of the ash crane in the ash pit was aimed at transporting and removing the incineration ash. Therefore, no consideration has been given to controlling the ash crane to adjust the retention time of the incineration ash in the ash pit. Therefore, the inventors have conducted various studies on methods for loading and unloading ash into the ash pit in order to ensure a more efficient retention time of ash in the ash pit.

[0022] Specifically, the inventors have devised a method of classifying the incineration ash stored in the ash pit into multiple areas (e.g., Area A, Area B, Area C, Area D) according to the time of addition, and transporting it out of the ash pit in the order of the time of addition after four days. Since most of the bottom ash of the incineration ash brought in from the incinerator falls near the chute, it is preferable to move the bottom ash of the incineration ash that falls near the chute to the area where it was classified by an ash crane. Furthermore, if the incineration ash is left in a hydrated state, it will harden and become impossible for the ash crane's claws to enter, so it is necessary to move the incineration ash using an ash crane.

[0023] Furthermore, even when a retention time of four days or more is required, the upper limit of the retention time is determined by the volume of the ash pit. The upper limit of the retention time depends on the volume of the ash pit. As an example, in most cases, the upper limit of retention time for a typical incineration ash storage facility is six days (144 hours). Even in this case, the desired retention time for the incineration ash can be ensured by controlling the ash crane to transport the incineration ash out of the ash pit in the order in which it was deposited.

[0024] The inventor further studied the issue and came up with a method for measuring the humidity and temperature inside the ash pit, measuring the atmosphere in the ash pit, calculating the moisture content of the incineration ash, and adding water to achieve the desired moisture content. The inventor also came up with a method for increasing the volume of the ash pit, if the volume is insufficient to ensure the incineration ash residence time, by increasing the volume and increasing the stirring work by the ash crane. The inventor also came up with methods for simplifying the work of the ash crane by creating a multi-chamber ash pit with two or three compartments, recirculating the conveyor, changing the discharge outlet for each day the incineration ash is dumped into the ash pit, for example, using a scraper conveyor, and using a pusher to push the dumped incineration ash in the direction of discharge, so that the newest incineration ash is always deposited directly below the conveyor.

[0025] As described above, to fully ensure the effect of adding water to incineration ash in suppressing the elution of heavy metals such as Pb, it is desirable to maintain the bottom ash at a predetermined moisture content for four days or more. However, prior art designs have not been developed to ensure a retention time of four days or more for incineration ash stored in an ash pit. In contrast, the inventors' extensive research has revealed that when adding water to incineration ash to an ash pit, it is possible to control the ash to be transported to the site in the order in which it was added, thereby ensuring a retention time of four days or more. This makes it possible to transport the incineration ash as needed so that the retention time is equal to or less than the upper limit (e.g., six days) depending on the volume of the ash pit, thereby efficiently suppressing the elution of heavy metals such as Pb from the incineration ash. The following embodiment was devised by the inventors based on the above extensive research.

[0026] (Embodiment) Fig. 1 is a diagram showing an incineration ash treatment facility as an incineration ash treatment device according to this embodiment. As shown in Fig. 1, the incineration ash treatment facility 1 is configured with an ash storage facility 2 equipped with an ash pit 3 and a control unit 10 that controls the ash storage facility 2.

[0027] A chute 2a is provided on the side wall of the ash storage facility 2. Incineration ash S is discharged from an incinerator (not shown), transported by a conveyor 4, and carried into the ash storage facility 2 through the chute 2a. The conveyor 4 is composed of, for example, a vibrating conveyor or a scraper conveyor.

[0028] A thermometer 21 and a hygrometer 22 are provided on the top of the ash storage facility 2 as atmosphere measuring means. The thermometer 21 as temperature measuring means is configured to be able to measure the temperature of the atmosphere in the internal space of the ash storage facility 2. The hygrometer 22 as humidity measuring means is configured to be able to measure the humidity of the atmosphere in the internal space of the ash storage facility 2. The temperature measurement value measured by the thermometer 21 and the humidity measurement value measured by the hygrometer 22 are output to the control unit 10. Note that instead of the thermometer 21 and the hygrometer 22, a laser meter can also be used as atmosphere measuring means capable of measuring the moisture content of the incineration ash S.

[0029] Discharge nozzles 23a, 23b are provided on the top of the ash storage facility 2 as spraying means configured to be able to spray liquid or gas into the ash pit 3. Low-pressure steam obtained in a waste incineration facility (not shown) attached to the ash storage facility 2 is supplied to the discharge nozzles 23a, 23b. The discharge nozzles 23a, 23b are configured to be able to discharge the supplied low-pressure steam as steam or moisture (hereinafter referred to as water, etc.) into the ash pit 3. The discharge amount of steam or moisture from the discharge nozzles 23a, 23b is controlled by the control unit 10.

[0030] An ash crane 24 is also provided on top of the ash storage facility 2 as a gripping means capable of gripping, moving, and dumping the incineration ash S stored in the ash pit 3. The ash crane 24 is configured to be movable in a plane in all directions, front to back and left to right, when viewed from above, at the top of the ash storage facility 2. The ash crane 24 is configured with a bucket 24a that actually grips the incineration ash S. The ash crane 24 and bucket 24a are controlled by the control unit 10 to move, grip, and dump the incineration ash S.

[0031] Specifically, the control unit 10 as a control means includes a processor such as a CPU (Central Processing Unit), a DSP (Digital Signal Processor), or an FPGA (Field-Programmable Gate Array), and a main memory unit such as a RAM (Random Access Memory) or a ROM (Read Only Memory) (none of which are shown). The main memory unit may be configured with a storage medium selected from an EPROM (Erasable Programmable ROM), a hard disk drive (HDD), a solid state drive (SSD), and removable media. The removable media may be, for example, a Universal Serial Bus (USB) memory or a disc storage medium such as a CD (Compact Disc), a DVD (Digital Versatile Disc), or a Blu-ray (registered trademark) Disc (BD).

[0032] The control unit 10 acquires the measured values ​​from the thermometer 21 and the hygrometer 22 and stores them in the stored material database 11 in the main memory. The stored material database 11 is constructed by a database management system (DBMS) program executed by the control unit 10 managing the data stored in the memory. The stored material database 11 also stores the weight of the incineration ash S stored in the ash pit 3. The weight of the incineration ash S stored in the ash pit 3 can be derived by the control unit 10 based on the mass of the incineration ash S transported by the conveyor 4, etc.

[0033] The control unit 10 can control the ash crane 24 by reading the crane control software 12 and executing the software program. The ash crane 24 moves, grips, and releases the incineration ash S under the control of the control unit 10 based on the crane control software 12. The operation of the ash crane 24 described below is based on the control by the control unit 10, but the ash crane 24 may also be controlled by an operator, instead of the crane control software 12, inputting instructions to the control unit 10 for the operation of the ash crane 24 using a predetermined method.

[0034] The ash pit 3 is configured to store the incineration ash S that has been brought in. The ash pit 3 is divided into multiple areas, for example, four areas in this embodiment, as it progresses from the front of the entrance on the chute 2a side to the back. The four areas are divided into Area A 3a, Area B 3b, Area C 3c, and Area D 3d from the chute 2a side. Note that Areas A 3a to D 3d are not bounded by partitions or the like, but they may be separated from one another by partitions at their boundaries. Furthermore, the number of divisions is not necessarily limited to four, and it is also possible to have two, three, or five or more areas. Furthermore, various methods for setting the areas are possible and are not limited to those described above.

[0035] (Incineration ash disposal method) In the incineration ash treatment facility 1 configured as described above, the residence time (retention time) in the ash pit 3 can be set to four days or more by using the ash crane 24 to move and stir the incineration ash S stored in the ash pit 3. In addition, in this embodiment, the moisture content of the incineration ash S stored in the ash pit 3 can be adjusted by adjusting the amount of water discharged from the discharge nozzles 23a, 23b. Next, an incineration ash treatment method according to this embodiment for adjusting the residence time of the incineration ash S stored in the ash pit 3 to a predetermined time of four days or more will be described. Figure 2 is a flowchart for explaining the incineration ash treatment method according to this embodiment. The flowchart shown in Figure 2 is executed by the control unit 10.

[0036] As shown in FIG. 2, in step ST1, the control unit 10 acquires the temperature measurement value in the space within the ash storage facility 2 from the thermometer 21 and the humidity measurement value in the space within the ash storage facility 2 from the hygrometer 22. The control unit 10 stores the acquired temperature and humidity measurement data as atmospheric conditions in the stored material database 11 as pit atmosphere information. It is also possible to acquire only one of the temperature measurement value and the humidity measurement value and use it as pit atmosphere information. The stored material database 11 also stores various other information, such as weight information including data on the weight of the incineration ash S stored in the ash pit 3, residence time information including data on the residence time of the incineration ash S in each specified area, moisture content information including data on the moisture content of the incineration ash S in each specified area, and transportation information including transportation data for the incineration ash S transported by the ash crane 24.

[0037] Next, the control unit 10 derives the moisture content of the incineration ash S (bottom ash) based on the acquired pit atmosphere information, i.e., the measured values ​​of temperature and humidity. If the moisture content of the incineration ash S can be derived from either the measured value of temperature or the measured value of humidity, the control unit 10 derives the moisture content of the incineration ash S from the measured value of temperature or humidity. The derived data on the moisture content of the incineration ash S is stored in the stored material database 11 as moisture content information. If a laser meter is used instead of the thermometer 21 and the hygrometer 22, the moisture content of the incineration ash S may be measured by the laser meter.

[0038] Here, in deriving the moisture content of the incineration ash S by the control unit 10 in step ST1, first, the saturated water vapor pressure is calculated according to the following equation (1) (Tetens equation), and the saturated water vapor amount is calculated based on the following equation (2). Then, the relative humidity of the air in the internal space of the ash storage facility 2 is calculated using the following equation (3). Note that the relative humidity can be calculated continuously, or the average value of the relative humidity values ​​measured intermittently several times over the course of a day can be used. This allows the moisture content of the incineration ash S to be calculated. Note that it is also possible not to execute the processing of step ST1. In addition, the control unit 10 can set the amount of water to be added to the incineration ash S based on the moisture content of the incineration ash S and spray moisture from the discharge nozzles 23a and 23b. This makes it possible to maintain the desired moisture content of the incineration ash S stored in the ash pit 3. Saturated water vapor pressure (hPa) =6.11×10 {(7.5×摂氏温度) / (摂氏温度+237.3)} …(1) Saturated water vapor amount (g / m 3 ) = 217 × saturated water vapor pressure / (temperature in degrees Celsius + 273.15)…(2) Relative humidity (RH) (%) = absolute humidity / saturated water vapor amount × 100 … (3)

[0039] Next, proceeding to step ST2, the control unit 10 acquires the residence time of the incineration ash S from the storage database 11 in each of the multiple areas set in the ash pit 3. Specifically, in this embodiment, the ash pit 3 is set with four areas, Area A 3a to Area D 3d, from the chute 2a side, where the incineration ash S is brought in, to the back side, where it is carried out. The control unit 10 acquires the residence time of the incineration ash S stored in each of Area A 3a to Area D 3d, which is derived based on the transportation information of the movement of the incineration ash S by the control of the ash crane 24 and stored in the storage database 11.

[0040] Next, proceeding to step ST3, the control unit 10 derives the movement path of the ash crane 24 and sets the stirring method based on the residence time of the incineration ash S in each of the A area 3a to D area 3d in the ash pit 3. Here, the control unit 10 derives the necessary residence time based on the derived moisture content of the incineration ash S, and derives a control process for the operation of the ash crane 24 so that the residence time is at least the derived residence time, for example, at least four days in this embodiment. The set control process for the operation of the ash crane 24 is stored in the crane control software 12.

[0041] Then, the process proceeds to step ST4, where the control unit 10 controls the ash crane 24 based on the control of the operation of the ash crane 24 by the crane control software 12, to move or transport the incineration ash S stored in the ash pit 3.

[0042] Here, an example of the operation method of the ash crane 24 according to this embodiment will be described. That is, the incineration ash S in the D area 3d of the ash pit 3 is discharged to the outside. Next, the incineration ash S in the C area 3c is moved to the portion of the incineration ash S in the D area 3d that has been discharged. Similarly, the incineration ash S in the B area 3b is moved to the portion of the incineration ash S in the C area 3c that has been discharged, and the incineration ash S in the A area 3a is moved to the portion of the incineration ash S in the B area 3b that has been discharged. This allows the incineration ash S to be sequentially moved to the D area 3d, the C area 3c, the B area 3b, and the A area 3a. In this case, the incineration ash S is stored for 4 to 6 days in the D area 3d, 3 to 5 days in the C area 3c, 2 to 4 days in the B area 3b, and 1 to 3 days in the A area 3a. Therefore, even if the volume of the ash pit 3 is not large, the incineration ash S to be discharged can be incineration ash S that has been stored for 4 days or more.

[0043] Furthermore, if the volume of the ash pit 3 is increased and the incineration ash S is likely to be left in a hydrated state, it is possible to add the work of stirring the incineration ash S several times a day using the ash crane 24. This makes it possible to prevent the incineration ash S from hardening or solidifying due to cementation.

[0044] FIG. 3 is a graph showing the retention time dependence of the amount of lead elution from the incineration ash S stored in the incineration ash treatment facility 1 according to this embodiment. From FIG. 3, when the retention time of the incineration ash S stored in the ash pit 3 is varied and the amount of elution of lead (Pb) (mg / L) is measured, it can be seen that the amount of elution of Pb (mg / L) can be significantly reduced by setting the retention time to 4 days or more. Furthermore, from FIG. 3, it can be seen that the amount of elution of Pb is reduced when the moisture content of the incineration ash S is 25% compared to when the moisture content is 15%. Thus, it can be seen that adding moisture to the incineration ash S can suppress the elution of Pb.

[0045] More specifically, Figure 3 shows that when the moisture content of the incineration ash S is 15%, a retention time of 4 days or more can suppress the amount of Pb leaching to 0.3 mg / L or less, thereby sufficiently suppressing the leaching of heavy metals. Furthermore, when the moisture content is 15%, even if the retention time is 5 days or more, the amount of Pb leaching is maintained at approximately 0.2 mg / L. Furthermore, when the moisture content of the incineration ash S is 25%, the amount of Pb leaching decreases with increasing retention time. Therefore, when the moisture content of the incineration ash S is 25% or less, the amount of Pb leaching can be suppressed by setting the retention time to 4 days or more. Therefore, the upper limit of the retention time can be set to 4 days or more based on the volume of the ash pit 3 and the size of the ash storage facility 2.

[0046] (First Modification) Next, the operation of the ash crane 24 according to the first modified example of this embodiment will be described. That is, incineration ash S is carried into area A 3a from an incinerator or the like via the conveyor 4 and chute 2a. In the first modified example, first, on the Nth day (N: natural number), the incineration ash S carried into area A 3a is moved to area B 3b. On the following day (N+1), the incineration ash S carried into area A 3a is moved to area C 3c. Furthermore, on the following day (N+2), the incineration ash S carried into area A 3a is moved to area D 3d. Then, on the (N+3) day, the incineration ash S in area B 3b is carried out to the outside. The incineration ash S is moved from area A 3a to area B 3b. On the (N+4) day, the incineration ash S in area C 3c is carried out to the outside. The incineration ash S is moved from area A 3a to area C 3c. On the (N+5)th day, the incineration ash S in the D area 3d is transported to the outside. The incineration ash S is moved to the D area 3d from the A area 3a. By repeating the above, the incineration ash S that has been in the D area for a predetermined time or more is preferentially transported to the outside.

[0047] In this way, the operation of the ash crane 24 is controlled so that the incineration ash S is moved in order from area A 3a where it is brought in to the other multiple areas 3b, 3c, 3d, and then transported to the outside in the order of movement. This ensures that the incineration ash S remains in the ash pit 3 for four days or more, and the incineration ash S that has remained for four days or more can be efficiently transported to the outside, so that even if the volume of the ash pit 3 is not large, the incineration ash S to be transported can be transported to the outside as incineration ash S that has remained for four days or more.

[0048] (Second Modification) Next, a second modification of the present embodiment will be described. FIGS. 4A and 4B are a side view and a top view, respectively, showing an ash storage facility 2A of an incineration ash treatment facility 1A according to a second modification of the present embodiment. As shown in FIG. 4B, in the incineration ash treatment facility 1A according to the second modification, the ash pit 3A is divided into multiple chambers (two chambers in this case) by a partition wall 31. The partition wall 31 physically divides the A and C areas 3a and 3c areas into the B and D areas 3b and 3d areas. The division between the A and C areas 3a and 3c areas, and the B and D areas 3b and 3d areas into the B and D areas 3b and 3d areas are not physically separated but are merely design divisions, as in the first embodiment described above. In this case, the incineration ash S transported from the conveyor 4 is first carried into the A and B areas 3a and 3b areas, but the other configurations are the same as those of the first embodiment and the first modification described above.

[0049] In this way, even if the ash pit 3A does not have a sufficient volume to ensure the retention time of the incineration ash S, the storage format of the incineration ash S can be changed and divided into multiple areas with physically separated chambers. This makes it possible to effectively utilize the area in the depth direction (vertical direction), as shown in Figure 4A, and the retention time of the incineration ash S can be set to four days or more, while simplifying the operation of the ash crane 24. The number of chambers is not limited to two, and may be three or more.

[0050] (Third Modification) Next, a third modification of the present embodiment will be described. Figure 5 is a diagram showing an example of carrying incineration ash S from a conveyor 4 to an ash pit 3 according to the third modification of the present embodiment. As shown in Figure 5, a plurality of discharge openings 4a are provided on the discharge side of a conveyor 4, such as a scraper conveyor. The discharge openings 4a are configured to be able to supply incineration ash S across the entire width of the carry-in side of the ash pit 3.

[0051] This configuration makes it possible to avoid the situation in which the incineration ash S thrown into the ash pit 3 is piled up directly below the chute 2a, making it difficult to move the incineration ash S by the ash crane 24 in a first-in, first-out manner.

[0052] (Fourth Modification) Next, a fourth modified example of the present embodiment will be described. Figure 6 is a diagram showing an example of carrying incineration ash into the ash pit 3 according to the fourth modified example of the present embodiment. As shown in Figure 6, the conveyor 4 according to the fourth modified example is configured to be movable parallel to the width direction of the input side of the ash pit 3. This makes it possible to carry incineration ash S evenly into the ash pit 3 in the width direction. Therefore, the same effect as in the third modified example can be obtained.

[0053] (Fifth Modification) Next, a fifth modification of this embodiment will be described. That is, in the fifth modification, an imaging device capable of imaging the incineration ash S stored in the ash pit 3 is provided on the upper or side of the ash storage facility 2. By performing image analysis on the imaging data obtained by imaging the incineration ash S with the imaging device as an imaging means, it is possible to derive the moisture content of the incineration ash S.

[0054] Specifically, image data of the incineration ash S in the ash pit 3 captured by an imaging device is output to the control unit 10, and the control unit 10 performs image analysis of the acquired image data to derive the moisture content of the incineration ash S. In this case, it is possible to use a learning model or a trained model generated by machine learning, such as deep learning using a neural network such as CNN, using image data obtained by actually capturing the incineration ash S as learning input parameters and an input / output data set in which the moisture content or average moisture content of the captured incineration ash S is used as learning output parameters. This allows the control unit 10 to derive the moisture content of the incineration ash S by inputting the image data of the incineration ash S as input parameters into the learning model.

[0055] The control unit 10 can derive the moisture content of the incineration ash S stored in the ash pit 3, thereby determining whether the moisture content is excessive or insufficient relative to the appropriate moisture content in the incineration ash S. The other configurations are the same as those of the above-described embodiment.

[0056] According to the embodiment described above, by storing the incineration ash S in the ash pit 3 for a residence time equal to or longer than a predetermined residence time, the residence time of the incineration ash S in the ash pit 3 can be maintained to be equal to or longer than the predetermined residence time, thereby making it possible to suppress the leaching of heavy metals such as Pb from the incineration ash S.

[0057] (Recording medium) In the above-described embodiment, a program for executing the incineration ash treatment method executed by the control unit 10 can be recorded on a recording medium readable by a computer or other machine (hereinafter, referred to as a computer, etc.). By having a computer, etc., read and execute the program from the recording medium, the computer, etc. functions as a mobile object control device. Here, a computer-readable recording medium refers to a non-transitory recording medium that stores information such as data and programs through electrical, magnetic, optical, mechanical, or chemical action and can be read by a computer, etc. Examples of such recording media that are removable from a computer, etc. include flexible disks, magneto-optical disks, CD-ROMs, CD-R / Ws, DVDs, Blu-rays, DATs, magnetic tapes, and memory cards such as flash memory. Furthermore, examples of recording media that are fixed to a computer, etc. include hard disks and ROMs. Furthermore, SSDs can be used as both removable and fixed recording media from a computer, etc.

[0058] Furthermore, the program executed by the control unit according to one embodiment may be configured to be stored on a computer connected to a network such as the Internet and provided by being downloaded via the network.

[0059] (Other embodiments) In the explanation of the flowcharts in this specification, the order of processing between steps is clearly indicated using expressions such as "first," "then," and "continue," but the order of processing required to implement this embodiment is not uniquely determined by these expressions. In other words, the order of processing in the flowcharts described in this specification can be changed within a consistent range.

[0060] Although the embodiments of the present invention have been specifically described above, the present invention is not limited to the above-described embodiments and various modifications based on the technical concept of the present invention are possible. For example, the numerical values ​​given in the above-described embodiments are merely examples, and different numerical values ​​may be used as necessary. The present invention also includes configurations that appropriately combine the components of the above-described embodiments and modifications. Furthermore, further effects and modifications can be easily derived by those skilled in the art. The broader aspects of the present invention are not limited to the specific details and representative embodiments shown and described above. Therefore, various modifications are possible without departing from the spirit or scope of the general inventive concept defined by the appended claims and their equivalents. [Explanation of symbols]

[0061] 1,1A Incineration ash treatment facility 2,2A ash storage equipment 2a Shooter 3,3A Ash Pit 3a A area 3b Area B 3c C area 3d D area 4 Conveyor 4a Outlet 10 Control Unit 11. Storage Database 12 Crane Control Software 21 Thermometer 22 Hygrometer 23a, 23b Discharge nozzle 24 Ash Crane 24a Bucket 31 Bulkhead S Incineration ash

Claims

1. an incineration ash storage means configured to store incineration ash obtained by incinerating waste; A gripping means configured to be able to move the incineration ash; a control means for controlling the operation of the gripping means and storing the operation of the gripping means; The control means The gripping means is controlled so that the retention time of the incineration ash stored in the incineration ash storage means, which has elapsed since the incineration ash was carried into the incineration ash storage means, becomes a predetermined retention time. Incineration ash treatment equipment.

2. Further provided is an atmosphere measuring means for measuring the atmospheric state around the incineration ash stored in the incineration ash storage means, The control means Derive the moisture content of the incineration ash stored in the incineration ash storage means based on the measurement value of the atmospheric state obtained from the atmosphere measurement means; Deriving the predetermined residence time based on the moisture content. The incineration ash treatment device according to claim 1.

3. The control means The incineration ash stored in the incineration ash storage means is divided into a plurality of areas, The gripping means is controlled so as to transport out the incineration ash stored in an area where the incineration ash retention time is equal to or longer than the predetermined retention time in each of the plurality of areas. The incineration ash treatment device according to claim 1.

4. The control means Among the plurality of areas, with respect to an area from which incineration ash has been discharged, control is performed to move incineration ash in an area where incineration ash has a residence time of less than the predetermined residence time to the area from which the incineration ash has been discharged. The incineration ash treatment device according to claim 3.

5. an incineration ash storage means configured to store incineration ash obtained by incinerating waste; A gripping means configured to be able to move the incineration ash; A control means for controlling the operation of the gripping means and storing the operation of the gripping means, and an incineration ash processing method executed in an incineration ash processing apparatus comprising: The gripping means is controlled so that the retention time of the incineration ash stored in the incineration ash storage means from the time of transport to the incineration ash storage means becomes a predetermined retention time. Incineration ash disposal method.

6. The incineration ash treatment device further includes an atmosphere measuring means for measuring the atmospheric state around the incineration ash stored in the incineration ash storage means, The control means Derive the moisture content of the incineration ash stored in the incineration ash storage means based on the measurement value of the atmospheric state obtained from the atmosphere measurement means; Deriving the predetermined residence time based on the moisture content. The method for treating incineration ash according to claim 5.

7. The incineration ash stored in the incineration ash storage means is divided into a plurality of areas, The gripping means is controlled so as to transport out the incineration ash stored in an area where the incineration ash retention time is equal to or longer than the predetermined retention time in each of the plurality of areas. The method for treating incineration ash according to claim 5.

8. Among the plurality of areas, with respect to an area from which incineration ash has been discharged, control is performed to move incineration ash in an area where incineration ash has a residence time of less than the predetermined residence time to the area from which the incineration ash has been discharged. The method for treating incineration ash according to claim 7.

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