Combustion control method for a garbage incinerator and combustion control device for a garbage incinerator

Abstract

To provide a method of controlling combustion in a refuse incinerator, capable of optimizing the agitation condition of refuse accumulated in a refuse pit, according to the combustion condition of refuse in the incinerator, and capable of optimizing the estimation of the characteristics of the refuse fed into a refuse hopper.SOLUTION: The method of controlling the combustion in a refuse incinerator comprises: an unfed refuse managing step of managing the characteristics of refuse stored in a refuse pit; a step of estimating the characteristics of refuse during feeding, for managing the characteristics of the refuse being fed into a refuse hopper; a step of controlling combustion; a step of estimating the characteristics of refuse during combustion, for managing the characteristics of the refuse during combustion; a step of managing the characteristics of unfed refuse, the characteristics of refuse during feeding and the characteristics of refuse during combustion, in time series; a first optimization step of aligning the refuse characteristics information during combustion and the unfed refuse management information; and a second optimization step of aligning the refuse characteristics information during combustion and the refuse characteristics information during feeding.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a combustion control method for a waste incinerator and a combustion control device for a waste incinerator. [Background technology]

[0002] Patent document 1 discloses a method for operating a furnace unit, which includes a feed chute and a camera for capturing images of the surface of the feed chute, with the goal of keeping the furnace output, which is generally reflected in the steam output and is ultimately generated, as constant as possible, characterized in that the feed chute is provided with a slider, over which material flows to a grate, and the coverage of the feed chute, in particular the coverage of the slider with the material, and / or points of change in position, and therefore the movement of individual components or surface areas within the feed chute, are identified by an image evaluation unit.

[0003] In the case of a predetermined coverage of the feed chute or a predetermined change in the coverage, in particular a change in the coverage of the slider with a specific material flow depending on the material or the movement of the feeder, adjusting action is taken via air management and / or the speed of the grate.

[0004] Patent Document 2 proposes a system for evaluating the degree of mixing of waste in a waste pit. The garbage mixing degree evaluation system includes an imaging unit installed to capture images of garbage in a garbage pit from above, a three-dimensional garbage height calculation unit that calculates three-dimensional height information of the garbage, an image conversion unit that converts the image captured by the imaging unit into an aerial viewpoint image based on the installation information of the imaging unit, an image correction unit that obtains a corrected image that is corrected based on the three-dimensional height information of the garbage so that all areas of the aerial viewpoint image are on the same height plane, a binarization processing unit that gradates the corrected image and binarizes it at a predetermined threshold to obtain a binary image, and a mixture degree evaluation unit that divides the binary image into two or more evaluation areas having a plurality of divided areas and evaluates the garbage mixing degree of each evaluation area.

[0005] The mixture evaluation unit is equipped with a variation evaluation unit that calculates the extracted area of ​​the bright or dark parts of each divided area, calculates the variation in the extracted area of ​​the bright or dark parts of the divided area for all evaluation areas or for each evaluation area, and evaluates the mixture degree based on the variation. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Publication No. 2021-127934 [Patent Document 2] Japanese Patent Publication No. 2019-7633 Summary of the Invention [Problem to be solved by the invention]

[0007] The method described in Patent Document 1 determines that the combustion state will fluctuate when the material coverage rate or a change point occurs based on an image of the surface of the supply chute, and adjusts the amount of air supplied and / or the speed of the grate. However, further improvements were needed in terms of suppressing fluctuations in the combustion state, and in particular, there was a need to eliminate the inconvenience of automatic combustion control being hindered by abnormal fluctuations in the combustion state of the incinerator, frequently forcing a switch to manual control.

[0008] The waste mixture evaluation system described in Patent Document 2 aims to feed homogenized waste into the incinerator by grasping the state of the waste pit and controlling the operation of the waste crane to increase the degree of waste mixture. However, it has not been clearly analyzed how the degree of waste mixture contributes to stabilizing the state of waste combustion in the incinerator, and further improvements were needed from the perspective of stabilizing automatic combustion control.

[0009] The object of the present invention is to provide a combustion control method and a combustion control device for a waste incinerator that can optimize the stirring state of waste accumulated in a waste pit based on the combustion state of the waste in the incinerator and can optimize the estimation of the waste quality of the waste put into a waste hopper. [Means for solving the problem]

[0010] In order to achieve the above-mentioned object, a first characteristic configuration of a combustion control method for a refuse incinerator according to the present invention is a combustion control method for a refuse incinerator in which refuse thrown into a furnace from a refuse hopper is incinerated while being transported by a stoker mechanism, and steam is generated in a boiler by the combustion heat generated by the incineration process, the method comprising: a pre-feed refuse management step for managing the changing properties of the refuse in a block unit as pre-feed refuse management information for the refuse hopper based on a stirring process performed by a refuse crane device on the refuse stored in a refuse pit, and allowing the refuse of a block whose pre-feed refuse management information has reached a predetermined evaluation standard to be thrown into the refuse hopper; an at-feed refuse quality estimation step for estimating at-feed refuse quality information of the refuse thrown from the refuse pit to the refuse hopper based on a predetermined at-feed refuse quality estimation model; and a step for estimating the amount of steam generated by the boiler to be stable. The system comprises a combustion control step for automatically controlling the combustion state of the waste in the furnace in accordance with the waste quality information at the time of loading so as to determine the quality of the waste; a waste quality estimation step for estimating the waste quality information at the time of loading of the waste whose combustion is controlled by the combustion control step based on a predetermined waste quality estimation model at the time of loading; a waste quality management step for chronologically managing the pre-load waste management information, the waste quality information at the time of loading, and the waste quality information at the time of loading in association with the waste to be managed; a first optimization processing step for optimizing the evaluation criteria so that the waste quality information at the time of loading managed in the waste quality management step is consistent with the pre-load waste management information; and a second optimization processing step for optimizing the waste quality estimation model at the time of loading so that the waste quality information at the time of loading managed in the waste quality management step is consistent with the waste quality information at the time of loading.

[0011] Corresponding to the state of stirring of garbage in the garbage pit, pre-load garbage management information indicating the properties of the garbage before it is loaded into the garbage pit, garbage quality information at the time of loading indicating the properties of the garbage when it is loaded into the garbage hopper, and garbage quality information at the time of combustion indicating the properties of the garbage when it is burned in the furnace are managed chronologically in association with the processing progress of the garbage to be managed.

[0012] In the first optimization processing step, the evaluation criteria for evaluating the degree of agitation of the garbage stored in the garbage pit are optimized so that the garbage quality information at the time of combustion and the garbage management information before input are consistent.As a result, the agitation state of the garbage in the garbage pit can be properly managed, and stable and desirable garbage quality information at the time of combustion can be obtained.

[0013] In the second optimization processing step, the waste quality estimation model at the time of loading is optimized so that the waste quality information at the time of loading managed in the waste quality management step is consistent with the waste quality information at the time of loading, thereby obtaining appropriate waste quality information at the time of loading and stable, desirable waste quality information at the time of combustion. As a result, stable automatic control becomes possible in the combustion control step.

[0014] The second characteristic configuration is, in addition to the first characteristic configuration described above, that the pre-throwing garbage management step comprises an operation history acquisition step for acquiring the operation history of opening / closing, raising / lowering, and lateral movement of the grab bucket provided on the garbage crane device; an operation type determination step for determining the type of operation to be performed on the garbage, with the unit operation being the operation from gripping the garbage by the grab bucket to releasing it, based on the operation history; a pre-throwing garbage management information update step for updating the pre-throwing garbage management information for each block in response to changes in the storage position of the garbage stored in the garbage pit; and a pre-throwing garbage quality evaluation step for evaluating the pre-throwing garbage management information based on predetermined evaluation criteria and, based on the evaluation result, determining the next operation of the grab bucket or determining the storage position of the garbage to be thrown into the garbage hopper, and the pre-throwing garbage management information includes at least the degree of mixing and the processing time.

[0015] Pre-throw garbage management information indicating the state of agitation of garbage in the garbage pit includes at least the degree of agitation of garbage and the processing time, and this pre-throw garbage management information is managed for each of the blocks into which the garbage stored in the garbage pit is divided.

[0016] The operation type to be performed for the garbage belonging to each block is determined by considering the unit operation from the operation of grasping the garbage with the grab bucket equipped on the garbage crane device to the operation of releasing it. For example, if the state of a block changes due to the movement of garbage between blocks, the above-mentioned pre-loading garbage management information is updated corresponding to the changed block. In other words, the pre-loading garbage management information indicates the degree of agitation of the garbage accumulated in the garbage pit.

[0017] Based on the results of evaluating the pre-loading waste management information based on predetermined evaluation criteria, blocks for the purpose of transportation, blocks that can be loaded into the waste hopper, etc. are determined. By optimizing this evaluation criteria in the first optimization processing step, the state of agitation of the waste in the waste pit can be appropriately managed, and desirable waste quality information at the time of combustion can be obtained.

[0018] The third characteristic configuration is that, in addition to the first characteristic configuration described above, the waste quality estimation step at the time of loading includes a waste quality detection step at the time of loading that detects the waste quality at the time of loading, including the specific gravity of the waste loaded into the waste hopper, and a waste quality information generation step at the time of loading that generates the waste quality information at the time of loading based on the waste quality at the time of loading detected in the waste quality detection step at the time of loading and the waste quality estimation model at the time of loading.

[0019] The waste quality information at the time of loading is obtained by applying the waste properties at the time of loading, including the specific gravity of the waste measured when the waste is loaded into the waste hopper, to the waste quality estimation model at the time of loading. In the second optimization processing step, the waste quality estimation model at the time of loading is optimized so that the waste quality information at the time of combustion and the waste quality information at the time of loading are consistent, and as a result, appropriate waste quality information at the time of loading can be obtained so that stable and desirable waste quality information at the time of combustion can be obtained.

[0020] The fourth characteristic configuration is that, in addition to the first characteristic configuration described above, the combustion waste quality estimation step estimates the combustion waste quality information based on combustion conditions including the amount of waste fed into the furnace and transported by the stoker mechanism and the amount of combustion air, the amount of steam generated according to the combustion conditions, and a predetermined combustion waste quality estimation model.

[0021] By applying the combustion conditions, including the amount of waste transported by the stoker mechanism and the amount of combustion air, and the amount of steam generated according to the combustion conditions, to a waste quality estimation model during combustion, waste quality information during combustion can be appropriately estimated.

[0022] A first characteristic configuration of a combustion control device for a refuse incinerator according to the present invention is a combustion control device for a refuse incinerator that incinerates refuse thrown into the incinerator from a refuse hopper while transporting it with a stoker mechanism, and generates steam in a boiler using the combustion heat generated by the incineration process, and includes a pre-feed refuse management unit that manages the changing properties of the refuse in units of blocks as pre-feed refuse management information for the refuse hopper based on the agitation process performed by a refuse crane device on the refuse stored in a refuse pit, and allows the refuse of blocks whose pre-feed refuse management information has reached a predetermined evaluation standard to be thrown into the refuse hopper, an at-feed refuse quality estimation unit that estimates at-feed refuse quality information of the refuse thrown from the refuse pit to the refuse hopper based on a predetermined at-feed refuse quality estimation model, and a control unit that controls the steam generated by the boiler. The system is characterized in that it comprises a combustion control unit that automatically controls the combustion state of the waste in the furnace in accordance with the waste quality information at the time of loading so that the air volume is stable; a waste quality estimation unit at the time of loading that estimates the waste quality information at the time of loading of the waste whose combustion is controlled by the combustion control unit based on a predetermined waste quality estimation model at the time of loading; a waste quality management unit that chronologically manages the pre-load waste management information, the waste quality information at the time of loading, and the waste quality information at the time of loading in association with the waste to be managed; a first optimization processing unit that optimizes the evaluation criteria so that the waste quality information at the time of loading managed by the waste quality management unit is consistent with the pre-load waste management information; and a second optimization processing unit that optimizes the waste quality estimation model at the time of loading so that the waste quality information at the time of combustion managed by the waste quality management unit is consistent with the waste quality information at the time of loading.

[0023] The second characteristic configuration is, in addition to the first characteristic configuration described above, that the pre-throwing garbage management unit comprises an operation history acquisition unit that acquires the operation history of opening / closing, lifting / lowering, and lateral movement of the grab bucket provided on the garbage crane device; an operation type determination unit that determines the type of operation to be performed on the garbage, with the grab bucket's operation from gripping the garbage to its release operation as a unit operation based on the operation history; a pre-throwing garbage management information update unit that updates the pre-throwing garbage management information for each block in response to changes in the storage position of the garbage stored in the garbage pit; and a pre-throwing garbage evaluation unit that evaluates the pre-throwing garbage management information based on predetermined evaluation criteria and, based on the evaluation result, determines the next operation of the grab bucket or determines the storage position of the garbage to be thrown into the garbage hopper, and the pre-throwing garbage management information includes at least the degree of agitation and the processing time.

[0024] The third characteristic configuration is that, in addition to the first characteristic configuration described above, the waste quality estimation unit at the time of loading is equipped with a waste quality detection unit at the time of loading that detects the waste quality at the time of loading, including the specific gravity of the waste loaded into the waste hopper, and a waste quality information generation unit at the time of loading that generates the waste quality information at the time of loading based on the waste quality at the time of loading detected by the waste quality detection unit at the time of loading and the waste quality estimation model at the time of loading.

[0025] The fourth characteristic configuration is that, in addition to the first characteristic configuration described above, the combustion waste quality estimation unit estimates the combustion waste quality information based on combustion conditions including the amount of waste fed into the furnace and transported by the stoker mechanism and the amount of combustion air, the amount of steam generated according to the combustion conditions, and a predetermined combustion waste quality estimation model. [Effects of the Invention]

[0026] As described above, according to the present invention, it is possible to provide a combustion control method for a waste incinerator and a combustion control device for a waste incinerator that can optimize the stirring state of waste accumulated in a waste pit based on the combustion state of the waste in the incinerator and optimize the estimation of the waste quality of the waste put into a waste hopper. [Brief explanation of the drawings]

[0027] [Figure 1] Illustration of a waste incineration system equipped with a waste incinerator [Figure 2] An explanatory diagram of the crane device installed in the garbage pit [Figure 3] Diagram of a waste incinerator [Figure 4] Diagram of pre-loading waste management unit (waste pit management device) [Figure 5] An explanatory diagram of the blocks that are subject to management of waste accumulated in the waste pit [Figure 6] A flowchart showing a management method executed by a garbage pit management device. [Figure 7] (a) is an explanatory diagram of the functional block of the combustion control device, (b) is an explanatory diagram of the waste management section at the time of input, and (c) is an explanatory diagram of the waste management section at the time of combustion. [Figure 8] Illustrative diagram of waste quality estimation model at time of input [Figure 9] Flowchart showing a combustion control method for a waste incinerator DETAILED DESCRIPTION OF THE INVENTION

[0028] The combustion control method and the combustion control device for a refuse incinerator according to the present invention will be described below.

[0029] [Structure of waste incineration facility] Figure 1 shows a waste incineration facility equipped with a stoker-type waste incinerator 1. The waste incineration facility is equipped with a platform A where waste collection trucks can enter, a waste pit B where waste collected by the waste collection trucks is brought in and accumulated, a waste hopper D, a waste crane C that agitates the waste accumulated in the waste pit B and dumps it into the waste hopper D, a furnace chamber E, a waste heat boiler F installed in the space above the furnace chamber E, and an economizer G.

[0030] Furthermore, exhaust gas treatment equipment such as a cooling tower H and a dust collector I that treat the combustion exhaust gas generated in the furnace chamber E are arranged along the flue, and the exhaust gas purified by the exhaust gas treatment equipment is exhausted from a chimney J. An induced draft fan L is provided in the flue to maintain a negative pressure in the furnace chamber E.

[0031] By opening the double-door garbage input door K, which is installed between platform A and garbage pit B to prevent odor leakage and ensure safety, garbage collected and transported by garbage collection trucks is brought into garbage pit B. The garbage input door K is predetermined to correspond to the type of garbage, such as a door for general garbage or a door for crushed garbage.

[0032] The garbage brought into the garbage pit B is grasped by a grab bucket type garbage crane device C, which is automatically controlled by the crane control unit or operated by an operator in the control room, and after undergoing stirring processes such as transshipment, loosening, and scattering within the garbage pit B, it is transported to an opening formed at the top of the garbage hopper D and dropped into the garbage hopper D.

[0033] On the upper wall of the garbage pit B, there are installed a number of LiDAR sensors 6 that acquire the surface shape of the garbage thrown into the garbage pit B. In this embodiment, a total of six sensors are installed, two on the wall facing the garbage hopper D and two on each of the front and rear side walls. Note that instead of the LiDAR, an imaging device that can obtain a stereoscopic image can also be used. In the following explanation, the symbol 6 for the sensor will be used as the symbol for the LiDAR.

[0034] A hydraulically driven dust feeder P is installed at the bottom of the garbage hopper D, and the garbage thrown into the garbage hopper D is pushed by the dust feeder P into the furnace chamber E. The garbage thrown into the garbage hopper D functions as a sealing mechanism that blocks the inflow of outside air from the garbage hopper D into the furnace chamber E, and the induction by the induced draft fan L maintains a negative pressure in the furnace chamber E.

[0035] The furnace chamber E is equipped with a main combustion chamber 2 and a secondary combustion chamber 3 that completely burns the combustion exhaust gas generated in the main combustion chamber 2, and multiple water tubes WT of the waste heat boiler F are embedded in the wall of the secondary combustion chamber 3.

[0036] [Garbage crane device structure] As shown in Figure 2, the garbage crane device C includes a grab bucket 10, a hydraulic or electric opening / closing mechanism 11 that opens and closes the grab bucket 10, a lifting mechanism 12A that moves the grab bucket 10 up and down (in the Z-axis direction), a moving mechanism 12 that includes a traveling mechanism 12B that moves the grab bucket 10 left and right (in the Y-axis direction) and in the depth direction (in the X-axis direction), and a load cell 14 that is a weighing scale that detects the load on the grab bucket 10. The opening / closing mechanism 11 and the moving mechanism 12 are controlled by a crane control unit 21.

[0037] The crane control unit 21 is an electronic control device equipped with a computer, and is configured to operate the opening / closing mechanism 11 and the moving mechanism 12 by the operator operating the operating tools, or to automatically operate the opening / closing mechanism 11 and the moving mechanism 12 based on an automatic control program stored in memory.

[0038] The lifting mechanism 12A includes a wire that suspends the grab bucket 10 and a hoisting device that moves the grab bucket 10 up and down along the Z-axis direction by winding up or letting out the wire. Height information of the grab bucket 10, which is the distance along the Z-axis, is obtained from the amount of wire that is let out by the lifting mechanism 12A.

[0039] The traveling mechanism 12B includes a girder 15 that is installed between a pair of rails 18 that are installed in the depth direction along the left and right side walls of the garbage pit B, a traveling chassis 16 that causes the grab bucket 10 to travel in the Y-axis direction along the girder 15, and traveling wheels 17 that move the girder 15 in the X-axis direction. Therefore, the grab bucket 10 is configured to be able to move freely on the XY plane. In addition, the travel distance in the Y-axis direction is obtained by the travel distance of the traveling chassis 16 that travels on the girder 15 by the traveling mechanism 12B, and the travel distance in the X-axis direction is obtained by the travel distance of the traveling wheels 17.

[0040] A load cell 14 is mounted on the traveling chassis 16, and is configured to be able to detect the weight of the grab bucket 10 and the waste grasped by the grab bucket 10. The weight of the waste grasped by the grab bucket 10 is determined by subtracting the weight of the grab bucket 10 not grasping waste from the weight of the grab bucket 10 grasping waste.

[0041] [Waste incinerator structure] As shown in Figure 3, the main combustion chamber 2 is equipped with a stoker mechanism ST in which fixed grates and movable grates are alternately arranged along the direction of waste transport. The movable grates are driven back and forth relative to the fixed grates by hydraulic mechanisms h1, h2, and h3, thereby agitating the waste and transporting it downstream.

[0042] Four wind boxes W1, W2, W3, and W4 are installed below the stoker mechanism ST in order from upstream to downstream along the waste transport direction, and main combustion air is supplied to each of the wind boxes W1, W2, W3, and W4 from a forced draft fan. The upstream region of the stoker mechanism ST corresponding to wind box W1 is the drying zone ST1, the midstream region corresponding to wind boxes W2 and W3 is the combustion zone ST2, and the downstream region corresponding to wind box W4 is the post-combustion zone ST3.

[0043] A pressure sensor is provided in each of the wind boxes W1, W2, W3, and W4, and a pressure sensor is provided in the main combustion chamber 2, so that the pressure difference between each wind box and the main combustion chamber 2 can be detected. In addition, a flow rate sensor is provided to detect the flow rate of combustion air flowing into the main combustion chamber 2 via the stoker mechanism ST.

[0044] The waste pushed into the main combustion chamber 2 by the dust feeder P is mainly heated and dried in the drying zone ST1, and then gasified and burned in the combustion zone ST2. The waste carbonized by gasification and combustion is solid-state burned and incinerated in the post-combustion zone ST3 downstream of the combustion zone ST2, and after being incinerated, falls into an ash chute from the end of the post-combustion zone ST3.

[0045] A constricted portion is formed in the front wall 2F and rear wall 2R of the furnace chamber E from the main combustion chamber 2 to the inlet of the secondary combustion chamber 3, and a gas supply mechanism 4 is provided in the constricted portion. The gas supplied from the gas supply mechanism 4 agitates and straightens the combustion exhaust gas flowing into the secondary combustion chamber 3, and the combustion exhaust gas is completely combusted in the secondary combustion chamber 3.

[0046] The gas supplied from the gas supply mechanism 4 may be air for secondary combustion, exhaust gas extracted from the main combustion chamber 2, recirculated exhaust gas branched from the flue downstream of the dust collector I, or exhaust gas branched from another exhaust gas flow path, or a mixture of air and any of the above exhaust gases.

[0047] The total amount of main combustion air and secondary combustion air needs to be adjusted so that the theoretical air ratio to the material to be incinerated is approximately 1.3. For example, if all the air is supplied by main combustion air so that the theoretical air ratio is approximately 1.3, the gas supplied from the gas supply mechanism 4 may be only flue gas extracted from the flue. Alternatively, the system may be configured so that approximately 1.0% of the air is supplied by main combustion air and approximately 0.3% is supplied by secondary combustion air. A temperature sensor and a gas sensor are provided at the outlet of the secondary combustion chamber 3 to monitor the secondary combustion state in the secondary combustion chamber 3.

[0048] An industrial television camera 5 is installed on the rear wall 2R of the furnace chamber E, and captures the combustion state, including the combustion flame, of the waste being incinerated while being transported on the top surface of the stoker mechanism ST.

[0049] [Configuration of combustion control device] As shown in Figure 7(a), the combustion control device 60 is a device that stabilizes the amount of steam generated in the boiler using the combustion heat generated by the incineration of waste, and is equipped with a dust supply control unit 62 that adjusts the amount of waste supplied to the main combustion chamber 2 by the dust supply device P, a conveying control unit 63 that controls the conveying speed of each of the drying zone ST1, combustion zone ST2, and post-combustion zone ST3 using hydraulic mechanisms h1, h2, and h3, and an air supply control unit 64 that adjusts the amount of main combustion air supplied from each wind box W1 to W4 and also adjusts the amount of air supplied from the gas supply mechanism 4, and is equipped with a combustion control unit 61 that outputs control commands to each of the dust supply control unit 62, conveying control unit 63, and air supply control unit 64.

[0050] The combustion control device 60 further includes a pre-loading garbage management unit 20 that manages the properties of the garbage stored in the garbage pit B as a mixed state before loading, a loading garbage quality estimation unit 30 that manages the properties of the garbage loaded into the garbage hopper D as the garbage quality at the time of loading, a combustion garbage quality estimation unit 40 that manages the properties of the garbage to be incinerated in the furnace as the garbage quality at the time of combustion, and a garbage quality management unit 50 that manages all of these in an integrated manner.

[0051] The garbage quality management unit 50 associates the garbage management information before loading, the garbage quality information at loading, and the garbage quality information at combustion with the processing progress of the garbage to be managed, that is, manages it chronologically from the time it is loaded from the garbage pit B into the garbage hopper D to the time it is loaded into the furnace and incinerated.

[0052] The waste quality management unit 50 further includes a first optimization processing unit 51 and a second optimization processing unit 52. The first optimization processing unit 51 optimizes the evaluation criteria so that the waste quality information at combustion managed by the waste quality management unit 50 is consistent with the waste management information before input. The second optimization processing unit 52 optimizes the waste quality estimation model at input so that the waste quality information at combustion managed by the waste quality management unit 50 is consistent with the waste quality information at input.

[0053] The waste combustion control performed by the combustion control unit 61 is carried out based on an automatic combustion program, and control commands are output to each of the dust supply control unit 62, the conveying control unit 63, and the air supply control unit 64 so that the amount of steam generated based on the properties of the waste fed into the furnace and the combustion state of the waste being incinerated in the furnace becomes the target steam amount.

[0054] In detail, the combustion control unit 61 generates control commands corresponding to the waste supply speed by the dust feeding device P, the waste transport speed by the stoker mechanism ST, the amount of main combustion air supplied from each wind box W1 to W4, and the amount of air supplied from the gas supply mechanism 4 through feedforward control based on the waste quality at the time of loading, which is estimated by the waste quality estimation unit 30 at the time of loading and managed in time series by the waste quality management unit 50, and also through feedback control based on the detected values ​​from various sensors such as the steam volume sensor, furnace outlet temperature sensor, pressure sensor, flow rate sensor, gas sensor, and steam volume sensor mentioned above.

[0055] Furthermore, based on the combustion images inside the furnace taken by the industrial television camera 5, and based on the fluctuations in the burn-off position of the waste being burned in the stoker mechanism ST and the fluctuations in the thickness of the waste, the combustion control unit 61 corrects the control commands for the previously determined waste supply speed, waste transport speed, and air supply volume, and outputs these corrected values ​​as final control commands to the dust supply control unit 62, transport control unit 63, and air supply control unit 64, respectively.

[0056] Each control command is determined based on the calorific value of the waste per unit weight, which is the waste quality information at the time of loading managed by the waste quality management unit 50. If the waste quality information at the time of loading is accurate, subsequent combustion control will be stable, but if the waste quality information at the time of loading is not an appropriate value, the combustion state in the furnace may change suddenly, making automatic combustion control difficult. Therefore, the second optimization processing unit 52 is configured to optimize the waste quality estimation model at the time of loading so that the waste quality information at the time of combustion managed by the waste quality management unit 50 is consistent with the waste quality information at the time of loading.

[0057] Furthermore, the first optimization processing unit 51 is configured to optimize the evaluation criteria so that the waste quality information at the time of combustion managed by the waste quality management unit 50 is consistent with the waste management information before input. This makes it possible to keep the variation in the quality of the waste input into the waste hopper D within an acceptable range, and also improves the accuracy of the waste quality derived by the waste quality estimation model at input.

[0058] [Configuration of waste quality estimation unit at time of input] As shown in Figure 7(b), the waste quality estimation unit 30 at the time of loading is a device that estimates the waste quality information at the time of loading of waste loaded from the waste pit B to the waste hopper D by the waste crane device C based on a predetermined waste quality estimation model at the time of loading, and is equipped with a waste property detection unit 31 at the time of loading and a waste quality information generation unit 32 at the time of loading that generates the waste quality at the time of loading based on a pre-constructed waste quality estimation model at the time of loading.

[0059] The waste property detection unit 31 at the time of loading determines the specific gravity of the waste when it is loaded into the waste hopper D and the moisture content of the waste at that time as the waste properties at the time of loading. The specific gravity of the waste when it is loaded is determined by dividing the weight of the waste loaded into the waste hopper D, which is measured by a load cell provided on the waste crane device C, by the volume obtained from the waste surface height before and after the waste is loaded, which is measured by an ultrasonic sensor provided on the waste hopper D. Since the cross-sectional shape of the waste hopper D is known depending on the height from the bottom, the volume can be calculated once the waste surface height is determined. The moisture content of the waste is detected by a near-infrared moisture sensor or microwave moisture sensor provided on the waste hopper D.

[0060] Figure 8 illustrates an example of a waste quality estimation model at the time of loading, which shows the calorific value of waste per unit weight, in a two-dimensional space with the horizontal axis representing the specific gravity of the waste at the time of loading and the vertical axis representing the moisture content of the waste at the time of loading. In the figure, the model shows that the lower the specific gravity and the higher the moisture content, the greater the calorific value of the waste. The calorific value of the waste per unit weight (A>B>C>···>F [J / kg]) is estimated based on which bold-framed area the plotted point of the specific gravity of the waste at the time of loading and the moisture content of the waste at the time of loading falls within. In this embodiment, the specific gravity of the waste at the time of loading, the moisture content of the waste at the time of loading, and the calorific value of the waste per unit weight are obtained as waste quality information at the time of loading.

[0061] The characteristics of the garbage at the time of loading are not limited to the specific gravity and moisture content of the garbage. For example, an image of the garbage falling when it is loaded can be taken, and the extent of the garbage scattering can be analyzed using image processing, and the degree can be expressed numerically.

[0062] [Configuration of waste quality estimation unit during combustion] As shown in Figure 7(c), the combustion waste quality estimation unit 40 is a device that estimates the calorific value of waste per unit weight incinerated as combustion waste quality information based on a predetermined combustion waste quality estimation model, and is equipped with a combustion condition input unit 41, a steam volume input unit 42, and a combustion waste quality information generation unit 43 that is equipped with a pre-constructed combustion waste quality estimation model.

[0063] The combustion condition input unit 41 is a functional block that calculates the amount of combustible waste to be incinerated per given time, the required air volume, etc., based on control commands for the dust supply speed, conveying speed, and air supply volume, as well as values ​​from various sensors. The steam volume input unit 42 is a functional block that calculates the steam volume per given time based on values ​​from the steam volume sensor. The waste quality information generation unit 43 derives the calorific value of the waste incinerated per unit weight based on the amount of combustible waste to be incinerated per given time calculated by the combustion condition input unit 41, the required air volume, and the steam volume calculated using the waste quality estimation model during combustion. The waste quality estimation model during combustion may be defined by a known mathematical formula that describes the waste combustion process, or it may be composed of a machine learning device such as a neural network that derives the calorific value of the waste per unit weight from input data for the amount of combustible waste, the required air volume, and the steam volume.

[0064] [Configuration of Pre-filled Waste Management Department] The pre-loading waste management unit 20 is a device that divides the waste stored in the internal space of the waste pit B into multiple rectangular parallelepiped blocks and manages the changing properties of the waste on a block-by-block basis based on the waste agitation process by the waste crane device C. This will be described in detail below.

[0065] Figure 4 shows the functional blocks of the garbage pit management device 20, which mixes and processes the garbage brought into the garbage pit B to homogenize it. The garbage pit management device 20 functions as the "pre-loading garbage management unit 20" of the present invention. The management device 20 of the garbage pit B is an information processing device equipped with a computer that manages the garbage brought into the garbage pit B as garbage management information associated with the garbage storage location based on the garbage movement process carried out using a garbage crane device C equipped with a grab bucket 10 that can be opened, closed, raised, lowered, and moved laterally, and has a built-in weighing scale.

[0066] The management device 20 of the garbage pit B includes an operation history acquisition unit 22 that acquires the operation history of the grab bucket 10's opening / closing, lifting / lowering, lateral movement, and moved garbage weight, an operation type determination unit 23 that determines the type of operation to be performed on the garbage based on the operation history, with the unit operation being the operation of the grab bucket 10 gripping the garbage to the release operation, a pile height information acquisition unit 24, a management information update unit 25 that updates the garbage management information in response to changes in the shape of the garbage storage surface, and a garbage evaluation unit 26. The management information update unit 25 functions as the "pre-throw garbage management information update unit" of the present invention, and the garbage quality evaluation unit 26 functions as the "pre-throw garbage evaluation unit" of the present invention.

[0067] The operation history acquisition unit 22 acquires operation information such as opening and closing information by the opening and closing mechanism 11 of the grab bucket 10 obtained from the crane control unit 21, lifting and lowering movement information by the lifting mechanism 12A, traveling movement information by the traveling mechanism 12B, and load information obtained from the load cell 14.

[0068] The action type determination unit 23 determines the type of action performed on the garbage until the garbage gripped by the grab bucket 10 is released, that is, from the start of the gripping operation of the grab bucket 10 to the end of the release operation, as a unit action.

[0069] The types of operations include a "transfer operation" that moves waste from an arbitrary position in the waste pit B to a different position, a "releasing operation" that lifts up waste and drops it at the same position in the waste pit B, and a "scattering operation" that moves while dropping waste between an arbitrary position and a different position in the waste pit B. Other types of operations may also be defined.

[0070] To elaborate on the "unraveling operation," if the unraveling operation is performed at a position where the drop height from the garbage surface is higher than a predetermined height, there is a strong tendency for the bag to break, that is, for the bag containing the garbage to be torn, and if the drop height from the garbage surface is lower than the predetermined height, there is a weak tendency for the bag to break, and the garbage will simply be unraveled. By combining the above-mentioned transfer operation, unraveling operation, and scattering operation, the mixing of the garbage is promoted.

[0071] The difference between the weight of the waste held by the grab bucket 10 and the weight after the grab bucket 10 is released and the waste falls is calculated as the weight of the waste moved, and the volume of the waste moved by the grab bucket 10 is determined by dividing this weight by a preset waste density (specific gravity). The thickness of the waste at the destination is determined by dividing the calculated waste volume by the planar area of ​​the block, which will be described later. In this embodiment, the waste density is set to 0.3 based on past accumulated data. This value is not particularly limited and can be set appropriately depending on the characteristics of the waste being brought into the waste pit.

[0072] The waste stored in the waste pit B is managed by dividing it into rectangular blocks of a size associated with the grab bucket 10, and the storage location is managed by block, and waste management information indicating the state of the waste being mixed is assigned to each block. Blocks will be described in detail later.

[0073] The waste management information includes "type of waste," "mixing degree," "bag breakage degree," and "processing time." "Types of waste" are labeled and managed for each block as "today's waste," "accumulated waste," "crushed waste," and "bottom waste." "Today's waste" is waste that has just been put in through the waste inlet door K for general waste. "Bottom waste" is waste that has been there since the beginning of management. "Crushed waste" is waste that has been put in through the waste inlet door K for crushed waste. "Accumulated waste" is waste that has been moved after the "today's waste" has been moved. When multiple types of waste are mixed due to the movement of waste by the grab bucket 10, the component ratios of each are expressed between 0 and 1.

[0074] The "mixing degree" is the cumulative number of "transshipment operations" performed by the grab bucket 10, and the initial value for "today's waste" is set to "0", and "1" is added each time a "transshipment operation" is performed. When waste with different "mixing degrees" are mixed due to "transshipment operations" or "scattering operations", the degree is calculated as the average of the sum values ​​obtained by multiplying each "mixing degree" by the volume ratio as a weight.

[0075] For example, if two-thirds of the volume of waste in a block with a mixing level of 3 and one-third of the volume of waste in a block with a mixing level of 1 are moved to another location and mixed together, the mixing level of the new block is calculated as (3 + 1) x 2 / 3 + (1 + 1) x 1 / 3 = 10 / 3. The higher the value, the more mixed the waste is, and the more stable the waste is, with less variation in waste quality and easier to burn.

[0076] The "bag breaking rate" is a value indicating the degree to which plastic garbage bags containing garbage are broken. When the grab bucket 10 drops the bags at the same location, if the drop height is equal to or greater than a predetermined height, the bag breaking effect is considered to be large, and "1" is added. If the drop height is less than the predetermined height, the bag breaking effect is considered to be small, and "0.2" is added. When different blocks of garbage are mixed, the "bag breaking rate" is calculated as the average of the sum values ​​obtained by multiplying each block's "bag breaking rate" by its volume ratio as a weight, as described above. Similarly, the larger the value, the higher the degree of "unraveling" and the garbage is judged to be more combustible. Note that the above values ​​are merely examples and are not limited to these values.

[0077] The "processing time" is the most recent time that any of the following operations was performed: loading, unpacking, or scattering. The quality of the waste is evaluated based on the amount of time that has passed since that time. The longer the elapsed time, the thicker the waste is evaluated to be and the more difficult it is to burn.

[0078] As shown in Figure 5, the waste accumulated in the waste pit B is partitioned vertically so that squares measuring x0 in length and y0 in width are arranged in a plan view. Within each partition, rectangular areas partitioned in the height direction from the bottom of the waste pit B to the top surface of the waste at a pitch of z0 are the blocks to which waste management information is assigned.

[0079] The size of the block is not particularly limited, but is set to the same size as the square area of ​​the grab bucket 10 when the grab bucket 10 is open, specifically x0 = 3m, y0 = 3m, and the height is set to z0 = 0.5m. In one garbage grasping operation by the grab bucket 10, garbage with a maximum volume of 3m x 3m x 3m can be grasped, and the grab bucket is configured to be able to grasp garbage six times the amount of the smallest unit block at one time.

[0080] In this embodiment, the size of the garbage pit B is set to Y=15 m and X=51 m, so the number of blocks in the X direction is 17 and the number of blocks in the Y direction is 5. In other words, the storage location of the garbage stored in the garbage pit B is managed by dividing it into blocks of a size associated with the grab bucket 10, and garbage management information is assigned to each block.

[0081] The pile height information acquisition unit 24 allocates a distance image, which is a collection of points represented by coordinates (x, y, z) and is measurement data acquired from the LiDAR 6, to multiple square planar areas arranged at a pitch of x0 vertically and y0 horizontally in a planar view based on the (x, y) components, and sets the average value of the z components of the distance images allocated to each planar area as the height of each planar area. When garbage is moved by the grab bucket 10, the height of the area from which it was moved decreases and the height of the area to which it was moved increases. Each block is partitioned from the bottom of the garbage pit B, with the surface height of the garbage thus determined as the upper limit.

[0082] A management information updating section 25 allocates waste management information to each block, and every time any of "transshipment operation," "unpacking operation," and "scattering operation" is performed, it reconstructs the changed block and updates the waste management information of the changed block.

[0083] The measurement data obtained by the LiDAR 6 may be obtained after a predetermined time has elapsed or after each unit operation of the grab bucket 10 is completed, but it is preferable to obtain the measurement data when the grab bucket 10 is positioned sufficiently high up so that the grab bucket 10 does not become an obstacle during measurement.

[0084] The waste evaluation unit 26 evaluates the waste management information based on a predetermined evaluation value, and based on the evaluation results, determines the next operation of the grab bucket 10 and issues a command to the crane control unit 21, thereby determining the storage location of the waste to be dumped into the waste hopper D. "Evaluation values" are set for each of the "waste type," "mixing degree," "bag breakage degree," and "processing time." For "waste type," the ratio of each component is set to a predetermined intermediate value between 0 and 1, for example, in the range of 0.4 to 0.6. "mixing degree" is set to a value that indicates sufficient mixing, and "bag breakage degree" is set to a value that indicates each type of waste has been evenly and sufficiently broken and opened. Since the "processing time" is the time elapsed since the last processing, it is set to a value that falls within a predetermined elapsed time.

[0085] By comparing the waste management information with the above-mentioned evaluation values, the state of the waste can be objectively evaluated. Based on the evaluation results, one of the following operations is selected for the block of waste with a low degree of mixing: "transloading operation," "unpacking operation," or "scattering operation," and a command is given to the crane control unit 21 so that the "type of waste," "mixing degree," "bag breakage degree," and "processing time" reach the evaluation values.

[0086] For a "transfer operation," you simply specify the source and destination blocks, and for a "scatter operation," you simply specify the source block and multiple destination blocks. For example, you can prioritize blocks with low evaluation results as the source block, and blocks with high evaluation results as the destination block.

[0087] Based on the evaluation results, waste from blocks whose "type of waste," "mixing degree," "bag breakage degree," and "processing time" have reached their evaluation values ​​can be dumped into waste hopper D as sufficiently mixed waste, thereby achieving stable incineration processing.

[0088] FIG. 6 shows a method for managing the garbage pit B executed by the management device 20 of the garbage pit B. The garbage pit management method is a method of managing garbage brought into the garbage pit as garbage management information associated with the garbage storage location based on a garbage movement process performed using a garbage crane device.

[0089] When the garbage movement process is performed using the garbage crane device (SA1), the operation history acquisition unit 22 executes an operation history acquisition step to acquire the operation history of the grab bucket's opening and closing, lifting and lowering, lateral movement, and garbage weight (SA2).

[0090] The operation type determination unit 23 executes an operation type determination step (SA3) to determine the type of operation to be performed on the garbage, based on the operation history, with the unit operation being the operation from gripping the garbage with the grab bucket to the release operation, and the management information update unit 25 executes a management information update step (SA4) to update the garbage management information in response to changes in the shape of the garbage storage surface.

[0091] The waste evaluation unit 26 executes a waste evaluation step to evaluate the waste management information based on a predetermined evaluation value (SA5), and based on the evaluation results, determines the next operation of the grab bucket for the block of waste that is not sufficiently mixed, outputs a command to the crane control unit 21 (SA7), and dumps the block of waste that is sufficiently mixed into the waste hopper D (SA6).

[0092] The height of the waste surface of the block that has changed due to the "transfer operation," "unloading operation," and "scattering operation" is obtained by the pile height information acquisition unit 24, and is also obtained by the operation type determination unit 23 from the change in weight of the grab bucket and the specific gravity of the waste. If the difference in the heights obtained by both operations falls within a predetermined tolerance range, it is determined that the "transfer operation," "unloading operation," and "scattering operation" have been performed properly. If the difference in the heights obtained by both operations deviates from the predetermined tolerance range, it is determined that there is an error in the measurement data obtained from the LiDAR 6, and the block is updated with priority given to the height obtained by the operation type determination unit 23. In other words, changes in the waste storage position are managed on a block-by-block basis based on the operation history and operation type.

[0093] [Method for controlling combustion in waste incinerators] A combustion control method executed by the above-described combustion control device 60 will be described with reference to FIG. The pre-loading garbage management unit 20 manages the changing state of the garbage as garbage management information before being loaded into the garbage hopper on a block-by-block basis based on the agitation process performed by the garbage crane device on the garbage stored in the garbage pit, and executes a pre-loading garbage management step that allows garbage in blocks whose pre-loading garbage management information has reached a predetermined evaluation standard to be loaded into the garbage hopper (SB1).

[0094] The combustion control unit 61 monitors the garbage surface height in the garbage hopper D using an ultrasonic sensor, and when the garbage surface height drops, it outputs a garbage dump command to the crane control unit 21. The crane control unit 21 dumps into the garbage hopper D garbage from blocks whose pre-load garbage management information has reached a predetermined evaluation standard.

[0095] The waste quality estimation unit 30 executes a waste quality estimation step at the time of loading, which estimates the waste quality information at the time of loading of the waste being loaded from the waste pit B to the waste hopper D based on a predetermined waste quality estimation model at the time of loading (SB2).

[0096] The combustion control unit 61 executes a combustion control step that automatically controls the combustion state of the waste in the furnace in accordance with the waste quality information at the time of input so that the amount of steam generated by the boiler is stabilized (SB3).

[0097] The waste quality estimation unit 40 executes a waste quality estimation step at combustion, which estimates waste quality information at combustion of the waste whose combustion is controlled in the combustion control step based on a predetermined waste quality estimation model at combustion (SB4).

[0098] The waste quality management unit 50 executes a waste quality management step (SB5) in which the waste management information before input, the waste quality information at input, and the waste quality information at combustion are managed in chronological order in association with the processing process of the waste being managed, i.e., the process of inputting the waste from the waste pit B into the waste hopper D, supplying the waste from the waste hopper D into the furnace, and burning it in the furnace.

[0099] As the combustion control progresses, when the combustion waste quality information is updated by the combustion waste quality estimation unit 40, the updated combustion waste quality information is compared with the corresponding pre-input waste management information, and if there is no consistency (SB6, NG), a first optimization processing step is executed (SB7) to optimize the evaluation criteria referenced in the pre-input waste management step.

[0100] Specifically, evaluation criteria are pre-set to indicate the degree of each of the following: "type of garbage," "degree of agitation," "degree of bag breakage," and "processing time," depending on the heat value per unit weight of garbage, which is garbage quality information at the time of combustion.

[0101] However, if the calorific value per unit weight obtained when the waste is actually burned deviates from the calorific value expected based on the preset evaluation criteria, the evaluation criteria are changed to make it consistent. In particular, "mixing degree" is highly correlated with "variation in calorific value." Therefore, if the calorific value per unit weight obtained when the waste is actually burned is higher than expected, the degree of mixing is reduced by lowering each evaluation criterion, and if the calorific value per unit weight is lower than expected, the degree of mixing is increased by raising each evaluation criterion.

[0102] As combustion control progresses, when the combustion waste quality information is updated by the combustion waste quality estimation unit 40, the updated combustion waste quality information is compared with the corresponding waste quality information at the time of input, and if there is no consistency (SB8, NG), a second optimization processing step is executed (SB9) to optimize the evaluation criteria referenced in the input waste quality estimation step.

[0103] The pre-throwing waste management step includes an operation history acquisition step for acquiring the operation history of the opening and closing, lateral movement, and moved waste weight of the grab bucket provided on the waste crane device, an operation type determination step for determining the type of operation to be performed on the waste, with the unit operation being from the start of the grab bucket's operation to the end of the opening operation, based on the operation history, a pre-throwing waste management information update step for updating the pre-throwing waste management information for each block in response to changes in the storage position of the waste stored in the waste pit, and a pre-throwing waste quality evaluation step for evaluating the pre-throwing waste management information based on predetermined evaluation criteria and, based on the evaluation results, determining the next operation of the grab bucket or the storage position of the waste to be thrown into the waste hopper.The pre-throwing waste management information includes the type of waste, the degree of agitation, the degree of bag breakage, and the processing time.

[0104] The waste quality estimation step at the time of loading includes a waste quality detection step at the time of loading that detects the waste quality at the time of loading, including the specific gravity of the waste loaded into the waste hopper, and a waste quality information generation step at the time of loading that generates waste quality information at the time of loading based on the waste quality at the time of loading detected in the waste quality detection step at the time of loading and a waste quality estimation model at the time of loading.

[0105] The combustion waste quality estimation step is a step in which combustion waste quality information is estimated based on combustion conditions including the amount of waste fed into the furnace and transported by the stoker mechanism and the amount of combustion air, the amount of steam generated according to the combustion conditions, and a predetermined combustion waste quality estimation model.

[0106] In the above-described embodiment, an example was described in which the waste management information was managed as "type of waste," "mixing degree," "bag breakage degree," and "processing time." However, the waste management information only needs to include "mixing degree" and "processing time," and may also include either "type of waste" or "bag breakage degree."

[0107] In the above-described embodiment, an example was described in which the operation history acquisition unit 22 acquires the operation history of the grab bucket 10, including opening / closing, lifting / lowering, lateral movement, and the weight of the waste moved, but the weight of the waste moved may not be the subject of acquisition. In this case, the volume of the waste moved can be determined based on changes in the surface shape of the waste acquired before and after the unit operation by a sensor that acquires the surface shape of the waste stored in the waste pit.

[0108] It goes without saying that the above-described embodiment is merely one example of the present invention, and the specific configuration of each part can be appropriately changed and designed within the scope of the effects of the present invention. [Explanation of symbols]

[0109] 1: Waste incinerator 6: Sensor (LiDAR) 20: Pre-injection waste management department 30: Waste quality estimation unit at time of input 40: Waste quality estimation unit during combustion 50: Waste Quality Management Department 51: First optimization processing unit 52: Second optimization processing unit 60: Combustion control device 61: Combustion control unit 62: Dust supply control unit 63: Transport control unit 64: Air supply control unit A: Platform B: Garbage pit C: Crane mechanism D: Garbage hopper E: Furnace room

Claims

1. A combustion control method for a refuse incinerator in which refuse thrown into the incinerator from a refuse hopper is incinerated while being transported by a stoker mechanism, and steam is generated in a boiler using the combustion heat generated by the incineration process, a pre-loading garbage management step in which, based on the agitation process performed by a garbage crane device on the garbage stored in the garbage pit, the changing state of the agitation of the garbage is managed in block units in the internal space of the garbage pit as pre-loading garbage management information for the garbage hopper, and garbage in a block whose pre-loading garbage management information has reached a predetermined evaluation standard is allowed to be loaded into the garbage hopper; a waste quality estimation step of estimating waste quality information at the time of waste being thrown from the waste pit into the waste hopper based on a predetermined waste quality estimation model at the time of throwing; a combustion control step of automatically controlling the combustion state of the waste in the furnace in accordance with the waste quality information at the time of input so that the amount of steam generated by the boiler is stable; a combustion waste quality estimation step of estimating combustion waste quality information of the waste whose combustion is controlled by the combustion control step based on a predetermined combustion waste quality estimation model; a waste quality management step of managing the waste management information before input, the waste quality information at input, and the waste quality information at combustion in chronological order in association with the waste to be managed; a first optimization process step of optimizing the evaluation criteria so that the waste quality information at the time of combustion managed in the waste quality management step and the waste management information before input are consistent; a second optimization process step for optimizing the waste quality estimation model at the time of input so that the waste quality information at the time of combustion managed in the waste quality management step is consistent with the waste quality information at the time of input; A combustion control method for a waste incinerator equipped with the above.

2. The pre-loading waste management step includes: an operation history acquisition step of acquiring an operation history of opening / closing, lifting / lowering, and lateral movement of a grab bucket provided in the garbage crane device; an action type determination step of determining an action type to be performed on the waste, with the unit action being from the action of gripping the waste by the grab bucket to the action of releasing the waste, based on the action history; a pre-throwing garbage management information updating step for updating the pre-throwing garbage management information for each block in response to a change in the storage position of the garbage stored in the garbage pit; a pre-throwing waste quality evaluation step for evaluating the pre-throwing waste management information based on predetermined evaluation criteria and determining the next operation of the grab bucket or the storage position of the waste to be thrown into the waste hopper based on the evaluation results; Equipped with 2. The method for controlling combustion in a refuse incinerator according to claim 1, wherein the waste management information before input includes at least a degree of agitation and a treatment time.

3. The waste quality estimation step at the time of input includes: a waste property detection step for detecting the waste property at the time of loading, including at least the specific gravity of the waste loaded into the waste hopper; a throw-in waste quality information generation step for generating the throw-in waste quality information based on the throw-in waste properties detected in the throw-in waste property detection step and the throw-in waste quality estimation model; 2. The combustion control method for a refuse incinerator according to claim 1, further comprising:

4. A combustion control method for a waste incinerator as described in claim 1, wherein the waste quality estimation step at the time of combustion estimates the waste quality information at the time of combustion based on combustion conditions including the amount of waste fed into the furnace and transported by the stoker mechanism and the amount of combustion air, the amount of steam generated according to the combustion conditions, and a predetermined waste quality estimation model at the time of combustion.

5. A combustion control device for a refuse incinerator in which refuse thrown into the incinerator from a refuse hopper is incinerated while being transported by a stoker mechanism, and steam is generated in a boiler by the combustion heat generated by the incineration process, a pre-loading garbage management unit that manages the changing state of the garbage stored in the garbage pit on a block-by-block basis in the internal space of the garbage pit as pre-loading garbage management information for the garbage hopper based on the agitation process performed by a garbage crane device on the garbage stored in the garbage pit, and allows garbage in a block whose pre-loading garbage management information has reached a predetermined evaluation standard to be loaded into the garbage hopper; a waste quality estimation unit at the time of input that estimates waste quality information at the time of input of the waste input from the waste pit to the waste hopper based on a predetermined waste quality estimation model; a combustion control unit that automatically controls the combustion state of the waste in the furnace in accordance with the waste quality information at the time of input so that the amount of steam generated by the boiler is stable; a combustion waste quality estimation unit that estimates combustion waste quality information of the waste whose combustion is controlled by the combustion control unit based on a predetermined combustion waste quality estimation model; a waste quality management unit that manages the waste management information before input, the waste quality information at input, and the waste quality information at combustion in chronological order in association with the waste to be managed; a first optimization processing unit that optimizes the evaluation criteria so that the waste quality information at the time of combustion managed by the waste quality management unit and the waste management information before input are consistent; a second optimization processing unit that optimizes the waste quality estimation model at the time of input so that the waste quality information at the time of combustion managed by the waste quality management unit and the waste quality information at the time of input are consistent; A combustion control device for a waste incinerator.

6. The pre-loading waste management unit includes: an operation history acquisition unit that acquires operation history of opening / closing, lifting / lowering, and lateral movement of a grab bucket provided in the garbage crane device; an action type determination unit that determines the type of action to be performed on the waste, with the unit action being from the action of gripping the waste by the grab bucket to the action of releasing the waste, based on the action history; a pre-throwing garbage management information update unit that updates the pre-throwing garbage management information for each block in response to changes in the storage position of the garbage stored in the garbage pit; a pre-throw garbage evaluation unit that evaluates the pre-throw garbage management information based on predetermined evaluation criteria and determines the next operation of the grab bucket or the storage position of the garbage to be thrown into the garbage hopper based on the evaluation result; Equipped with 6. A combustion control device for a refuse incinerator according to claim 5, wherein said pre-feed refuse management information includes at least a degree of agitation and a treatment time.

7. The waste quality estimation unit at the time of input is a waste property detection unit at the time of loading that detects the properties of the waste at the time of loading, including at least the specific gravity of the waste loaded into the waste hopper; an input waste quality information generation unit that generates the input waste quality information based on the input waste quality detected by the input waste quality detection unit and the input waste quality estimation model; 6. A combustion control device for a refuse incinerator according to claim 5, further comprising:

8. The combustion control device for a waste incinerator as described in claim 5, wherein the combustion waste quality estimation unit estimates the combustion waste quality information based on the combustion state including the amount of waste fed into the furnace and transported by the stoker mechanism and the amount of combustion air, the amount of steam generated according to the combustion state, and a predetermined combustion waste quality estimation model.

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