Method for predicting adhesion of incineration ash, method for dealing with adhesion of incineration ash, and incineration system

Abstract

To provide an adhesion status prediction method for incineration ash for calculating a prediction index applicable commonly to a plurality of incineration systems, a method for dealing with adhesion of the incineration ash and the incineration system.SOLUTION: In an adhesion status prediction method for incineration ash for predicting an adhesion status of the incineration ash in at least either of an incinerator or a facility provided at a rear stage of the incinerator from a content of each constituent included in the incineration ash generated by incinerating an object to be incinerated in the incinerator, a first content of phosphorus, a second content of aluminum, a third content of calcium, a fourth content of magnesium and a fifth content of iron included in the incineration ash are measured, and a ratio of the second content to a product of a sum of the third content, the fourth content and the fifth content and the first content is calculated as a prediction index of the adhesion status.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for predicting the adhesion state of incineration ash, a method for dealing with the adhesion of incineration ash, and an incineration system. [Background technology]

[0002] In an incineration system that includes an incinerator for sewage sludge (hereinafter also referred to as sludge or incinerated material), the high-temperature exhaust gas discharged from the incinerator is passed through a heat exchanger to recover part of the exhaust heat, and then the dust is separated and removed in a dust collector. The exhaust gas is then passed through a flue gas treatment tower for water washing to remove the SO2 in the exhaust gas. X Exhaust gas treatment is being carried out to remove components such as sulfur dioxide and HCl (see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-227441 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the incinerator and heat exchanger as described above, if the incineration ash (incineration ash contained in exhaust gas) generated by the incineration of sludge adheres to the incinerator, heat exchanger, or piping, it may become difficult to maintain normal operation. Note that piping is sometimes called a duct, and a duct for exhaust gas is also called an exhaust gas duct. Therefore, in the incineration system as described above, for example, the adhesion status of incineration ash in the incinerator, heat exchanger, and piping is predicted, and further, measures are taken according to the prediction results, thereby maintaining normal operation.

[0005] Here, the properties of the sludge incinerated in the incinerator may differ for each sewage treatment plant in which the incineration system is installed. Therefore, for example, it may become necessary to use different prediction indices for each of the multiple incineration systems to be managed, which may make the management of each incineration system complicated. Therefore, it is desirable to calculate a common prediction indices even when the properties of the sludge are different. [Means for solving the problem]

[0006] In order to calculate the above-mentioned predictive index, the incineration ash adhesion condition prediction method of the present invention is a method for predicting the adhesion condition of incineration ash in at least one of the incinerator and the equipment installed downstream of the incinerator from the content of each component contained in the incineration ash generated by incineration of the material to be incinerated in the incinerator. The method measures the first content of phosphorus, the second content of aluminum, the third content of calcium, the fourth content of magnesium, and the fifth content of iron contained in the incineration ash, and calculates the ratio of the second content to the product of the first content and the sum of the third content, the fourth content, and the fifth content as a predictive index of the adhesion condition. Effect of the Invention

[0007] According to the method for predicting the adhesion state of incineration ash, the method for dealing with the adhesion of incineration ash, and the incineration system of the present invention, it is possible to calculate a common prediction index even when the properties of sludge are different. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of an incineration system 100 in the first embodiment. [Diagram 2] FIG. 2 is a flow chart illustrating the steps in the first embodiment. [Diagram 3] FIG. 3 is a diagram showing the experimental results of the incineration system 100 in the first embodiment. [Figure 4]FIG. 4 is a diagram illustrating a modification of the incineration system 100 in the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the technical scope of the present invention is not limited to these embodiments.

[0010] [Incineration system 100 according to the first embodiment] First, an incineration system 100 in the first embodiment will be described. Fig. 1 is a diagram illustrating a configuration example of the incineration system 100 in the first embodiment. Fig. 2 is a flow chart illustrating the steps in the first embodiment. Note that the arrangement positions and numbers of lines (pipes) and pumps shown below are examples and are not limited to these.

[0011] As shown in FIG. 1, the incineration system 100 includes, for example, an incinerator 1, a heat exchanger 2, a dust collector 3, a flue gas treatment tower 4, a chimney 5, and a control device 10.

[0012] The incinerator 1 is, for example, a fluidized bed incinerator that incinerates sludge. Specifically, the incinerator 1 has, for example, a so-called fluidized bed 1a. The sludge is also called dehydrated cake. In the following, the incinerator 1 will be described as a fluidized bed incinerator, but it may be, for example, a stoker furnace, a multi-layered combustion furnace, or any other type of incinerator.

[0013] The heat exchanger 2 exchanges heat between, for example, the exhaust gas discharged from the incinerator 1 via line L1 (exhaust gas duct) and air supplied from a blower (not shown) via line L11. Specifically, the heat exchanger 2 heats the air supplied via line L11 by using, for example, the exhaust gas discharged from the incinerator 1. Then, the heat exchanger 2 supplies the heated air to the incinerator 1 via, for example, line L12.

[0014] The incineration system 100 may have a turbocharger (not shown) having a compressor and a turbine. In this case, the heat exchanger 2 may, for example, use exhaust gas discharged from the incinerator 1 to heat the compressed air compressed by the compressor and supply the heated compressed air to the turbine. The turbine may, for example, supply the heated compressed air supplied from the heat exchanger 2 to the incinerator 1.

[0015] The dust collector 3 is disposed, for example, at a stage subsequent to the heat exchanger 2, and removes impurities from the exhaust gas supplied from the heat exchanger 2 via a line L2 (exhaust gas duct). Specifically, the dust collector 3 is, for example, a ceramic dust collector having excellent heat resistance.

[0016] The flue gas treatment tower 4 is disposed, for example, at the rear stage of the dust collector 3, and the flue gas supplied from the dust collector 3 via a line L3 (flue gas duct) is introduced from the lower part of the tower, etc. Then, the flue gas treatment tower 4 removes SO 2 in the flue gas, for example, by bringing the flue gas into contact with water sprayed from a water spray nozzle (not shown) at the top. X Components such as HCl are removed by soaking them in water. In addition, for example, a chimney 5 is disposed at the top of the flue gas treatment tower 4, which discharges the exhaust gas cleaned in the flue gas treatment tower 4 into the atmosphere.

[0017] The inducer F1 is, for example, a fan or blower that induces the exhaust gas discharged from the incinerator 1 to the exhaust gas treatment tower 4, and sends the cleaned exhaust gas in the exhaust gas treatment tower 4 to the chimney 5.

[0018] In this embodiment, regardless of manual control by a designer or manager, or automatic control by a measuring instrument and an information processing device, when the ratio of the amount of aluminum contained in the incineration ash to the product of the sum of the amount of calcium contained in the incineration ash, the amount of magnesium contained in the incineration ash, and the amount of iron contained in the incineration ash and the amount of phosphorus contained in the incineration ash generated by the incineration of the incineration target material in the incinerator 1 is less than a threshold value, at least one of the following is performed: control to lower the temperature of the exhaust gas discharged from the incinerator, control to remove the incineration ash attached to at least one of the incinerator and the equipment installed downstream of the incinerator, and control to increase the melting point of the incineration ash by adding a predetermined agent to the incineration target material. Here, adding a predetermined agent to the incineration target material means adding a predetermined agent in the process of various treatments (for example, water treatment, concentration treatment, dehydration treatment) when the incineration target material is sludge. The thickening process is a process for thickening various sludges, such as primary sludge, excess sludge, and mixed sludge of primary sludge and excess sludge, to produce thickened sludge. The dehydration process is a process for dehydrating sludge (e.g., thickened sludge) to produce dehydrated sludge. A specific chemical may be added to the dehydrated sludge after the dehydration process.

[0019] As a result of research, the inventor found that when the above ratio is less than the threshold value, the incineration ash becomes more likely to adhere to other objects due to melting and cooling of the incineration ash. The inventor then calculated the above ratio for incineration systems installed in geographically different sewage treatment plants, in other words, for multiple incineration systems installed in different locations, and further conducted experiments to determine the optimal threshold value, and found that this ratio can be used as a predictive index that can be commonly applied to multiple incineration systems. The threshold value and experiments will be described later.

[0020] The control device 10 performs a process for predicting the adhesion state of the incineration ash in at least one of the incinerator 1 and the equipment (for example, the heat exchanger 2 and the line L1) installed downstream of the incinerator 1, based on the amount of each component contained in the incineration ash generated by the incineration of the material to be incinerated in the incinerator 1. The control device 10 is, for example, a computer device having a CPU (Central Processing Unit) and a memory.

[0021] As shown in FIG. 2, the control device 10, for example, refers to a measuring device M that measures the amount of each component contained in the incineration ash generated in the incinerator 1, and measures (identifies) the amount of phosphorus contained in a predetermined amount of incineration ash (hereinafter also referred to as the first inclusion amount), the amount of aluminum contained in the predetermined amount of incineration ash (hereinafter also referred to as the second inclusion amount), the amount of calcium contained in the predetermined amount of incineration ash (hereinafter also referred to as the third inclusion amount), the amount of magnesium contained in the predetermined amount of incineration ash (hereinafter also referred to as the fourth inclusion amount), and the amount of iron contained in the predetermined amount of incineration ash (hereinafter also referred to as the fifth inclusion amount) (S1).

[0022] Then, the control device 10 calculates, for example, the ratio of the amount of aluminum contained to the product of the sum of the amount of calcium contained, the amount of magnesium contained, and the amount of iron contained and the amount of phosphorus contained, as a predictive index of the adhesion state of incineration ash (S2).

[0023] More specifically, the control device 10 calculates a prediction index (prediction index X M In the following formula (1), n ​​is an arbitrary integer.

[0024] X M =[Al2O3(mol)÷{CaO(mol)+MgO(mol)+Fe2O3(mol)}]÷(n×P2O5)(mol)...Equation (1)

[0025] Thereafter, when the control device 10 judges that the value indicated by the calculated prediction index is less than a predetermined threshold value (hereinafter, also simply referred to as the threshold value), it judges that there is a high possibility that incineration ash will adhere to at least one of the incinerator 1 and the equipment installed downstream of the incinerator 1, causing various malfunctions, and implements control (hereinafter, also referred to as improvement control) to improve the adhesion state of incineration ash in the incinerator 1, etc. (S3, S4). A specific example of improvement control will be described later.

[0026] That is, in the incineration system 100, if the amount of incineration ash adhering to the heat exchanger 2 or line L1 increases, blockage may occur in the heat exchanger 2 or line L1. Also, in the incineration system 100, if the incineration ash adheres to the fluidized sand (fluidized sand constituting the fluidized bed 1a) and grows, the fluidity of the fluidized bed 1a may deteriorate. Therefore, in the incineration system 100, it may be difficult to maintain normal operation depending on the adhesion state of the incineration ash to the heat exchanger 2 or line L1 or the adhesion state of the incineration ash to the fluidized sand constituting the fluidized bed 1a.

[0027] Therefore, the control device 10, for example, refers to a prediction index of the adhesion state of the incineration ash and predicts the adhesion state of the incineration ash in the incineration system 100. Then, when the control device 10 determines that the adhesion state of the incineration ash has reached a predetermined condition (for example, a condition that can be determined to be a condition that hinders the normal operation of the incineration system 100), it performs improvement control to maintain the normal operation of the incineration system 100.

[0028] Here, the properties of the sludge to be incinerated in the incinerator 1 may differ for each sewage treatment plant in which the incineration system is installed. Specifically, for example, the amount of inorganic substances (e.g., phosphorus, etc.) that cause the adhesion of incineration ash may differ for each sewage treatment plant. Therefore, for example, when there are multiple incineration systems to be managed, the optimal prediction index for predicting the adhesion status of incineration ash in a first incineration system included in the management target may not be the optimal prediction index for predicting the adhesion status of incineration ash in a second incineration system included in the management target.

[0029] Therefore, it is preferable that the control device 10 uses, for example, a prediction index that can be commonly applied to a plurality of incineration systems (that is, a prediction index that can make predictions according to the properties of the sludge in each incineration system).

[0030] In this regard, the melting point of incineration ash becomes lower as the amount of basic components (e.g., calcium, magnesium, and iron) and the amount of phosphorus contained in the incineration ash increases, and as a result, it can be determined that the incineration ash melts, cools, and adheres to other objects more easily (in other words, it can be determined that it is more likely to become clogged with clinker).On the other hand, the melting point of incineration ash becomes higher as the amount of acidic components (e.g., aluminum) contained in the incineration ash increases, and as a result, it can be determined that the incineration ash melts, cools, and adheres to other objects less easily (in other words, it can be determined that it is less likely to become clogged with clinker).

[0031] From the above, it can be determined that incineration ash that contains a small amount of basic components and phosphorus and a large amount of acidic components has low adhesion.

[0032] Therefore, the inventors have determined that the predictive index for the adhesion status of incineration ash is an index that takes a lower value as the proportion of basic components (calcium, magnesium, and iron) and phosphorus contained in the incineration ash increases, and takes a higher value as the proportion of acidic components (aluminum) increases.

[0033] The inventors have found that when the value indicated by the prediction index is less than the threshold value, for example, incineration ash is likely to adhere to at least one of the incinerator 1 and the equipment provided downstream of the incinerator 1, and there is a high need to implement measures to avoid blockage by clinker in the incineration system 100. On the other hand, the inventors have found that when the value indicated by the prediction index is not less than the threshold value, for example, incineration ash is unlikely to adhere to each of the incinerator 1 and the equipment provided downstream of the incinerator 1, and there is a low need to implement measures to avoid blockage by clinker in the incineration system 100.

[0034] In this manner, in this embodiment, a prediction index that can take into account differences in the properties of incineration ash (differences in the amounts of each component contained in incineration ash) is calculated. Specifically, in this embodiment, for example, the ratio of the amount of aluminum contained to the product of the sum of the amount of calcium contained, the amount of magnesium contained, and the amount of iron contained and the amount of phosphorus contained is calculated as a prediction index of the adhesion state of incineration ash.

[0035] As a result, in this embodiment, it is possible to calculate a prediction index that is applicable to a plurality of incineration systems and that can accurately predict the adhesion state of incineration ash in each incineration system. Therefore, by using the calculated prediction index, the control device 10 can perform various controls for improving the adhesion state of incineration ash in the incinerator 1 of each incineration system at an appropriate timing for each incineration system.

[0036] In addition, in this embodiment, by using the calculated prediction index, it is not necessary to use multiple different prediction indexes for each incineration system, and it is possible to reduce the complexity of managing each incineration system (the workload of the manager required to manage each incineration system). Specifically, in this embodiment, by analyzing and understanding the properties of the incineration ash in advance, it is possible to take necessary measures during the incineration system design and construction process, and it is possible to reduce the complexity of management after the start of operation (the workload of the manager required to manage the incineration system).

[0037] Furthermore, in this embodiment, by using the calculated predictive index, there is no need to change or add predictive indexes even if there are seasonal variations in the properties of sludge in each incineration system.

[0038] In addition, when it is determined that the value indicated by the prediction index is less than a predetermined threshold value, the control device 10 may output, for example, information indicating that there is a high possibility that incineration ash has adhered to at least one of the incinerator 1 and the equipment provided downstream of the incinerator 1 (hereinafter, also referred to as prediction result information). Specifically, the control device 10 may output the prediction result information to an output terminal (not shown) such as a PC (Personal Computer) that can be viewed by the manager of the incineration system 100 (hereinafter, also referred to simply as the manager).

[0039] This allows the manager to grasp the adhesion status of incineration ash in the incinerator 1 or the like by viewing the output terminal, for example.

[0040] In addition, in the above example, a case has been described in which the process of predicting the adhesion state of incineration ash is performed by the control device 10, but the prediction of the adhesion state of incineration ash (i.e., each step from S1 to S4 described in FIG. 2) may be performed manually by an administrator who refers to a manual, for example.

[0041] [Experimental Results for the First Embodiment] FIG. 3 is a diagram for explaining the experimental results for the first embodiment. The horizontal axis in FIG. 3 corresponds to each incineration system (incineration system 100 to incineration system 900) that was the subject of the experiment. The vertical axis in FIG. 3 corresponds to the prediction index X calculated for each incineration system that was the subject of the experiment. M The experimental results correspond to those in (1), where each incineration system is installed in a geographically different sewage treatment plant.

[0042] The graph shown in FIG. 3 shows the prediction index X M The experimental result of is about 0.6, and the prediction index X M The experimental result of the prediction index X in the incineration system 300 is about 1.6. M The experimental result of the prediction index X in the incineration system 400 is about 1.8.M The experimental result of is about 2.7, and the prediction index X in the incineration system 500 M The experimental result of the incineration system 600 is about 4.0, and the prediction index X M The experimental result of the prediction index X in the incineration system 700 is about 4.6. M The experimental result of the prediction index X in the incineration system 800 is about 4.65. M The experimental result of the incineration system 900 is about 8.5. M Experimental results show that it is about 5.8.

[0043] Here, the inventors have determined that each prediction index X M At the time of calculation, it was confirmed that in each of the incineration systems 100, 200, and 300, which are located to the left of the vertical dashed line, blockages actually occurred at some of the locations, including the heat exchanger and exhaust gas duct ("Blockage Present" in FIG. 3). On the other hand, the inventor confirmed that at the time of calculation, in each of the incineration systems 400, 500, 600, 700, 800, and 900, which are located to the right of the two-dot chain line, blockages did not occur at any of the locations, including the heat exchanger and exhaust gas duct ("No Blockage" in FIG. 3).

[0044] That is, the experimental results shown in FIG. 3 show that, for example, the prediction index X M The experimental results shown in Fig. 3 also show that blockage occurs in incineration systems where the prediction index X M Incineration systems with a value of more than 1.8, predictive index X M This indicates that the likelihood of blockage occurring in incineration systems with a β value less than 2.7 is unknown.

[0045] Therefore, the inventors have determined a threshold value between 1.8 and 2.7 (hereinafter referred to as the threshold range) for determining whether or not clogging is likely to occur in each incineration system. M If is less than the maximum value of this threshold range, it is considered that there is a high possibility of blockage occurring in this incineration system, and improvement control is performed. The numerical value of this threshold may be set to, for example, 2.0, which is less than the average value of 1.8 and 2.7 rounded off to the nearest whole number.

[0046] [Modification of the first embodiment] Next, a modified example of the incineration system 100 in the first embodiment will be described. Figure 4 is a diagram for explaining a modified example of the incineration system 100 in the first embodiment. Below, differences from the incineration system 100 described in Figure 1 will be described.

[0047] Before the construction of the incineration system 100 (for example, at the design stage of the incineration system 100), during construction, or after construction, as described in the first embodiment, the prediction index X M If is less than a threshold value (e.g., 2.0), the designer or the like decides to install improvement control equipment in the incineration system 100. As shown in FIG. 4, the improvement equipment is at least one of various devices such as a temperature suppression device 20 that suppresses the temperature of the exhaust gas discharged from the incinerator 1, an incineration ash removal device 30 that removes incineration ash that has adhered to various locations in the incineration system 100, and an agent addition device 40 that adds an agent that can increase the melting point of incineration ash to the sludge before it is put into the incinerator 1. After the installation, the prediction index X of the adhesion state of incineration ash in the incineration system 100 is calculated at an appropriate timing such as each season. M is calculated, and the incineration system 100 controls various devices according to the calculation result.

[0048] In Fig. 4, the incineration system 100 has, for example, a temperature suppression device 20, an incineration ash removal device 30, and a chemical addition device 40. That is, each of the temperature suppression device 20, the incineration ash removal device 30, and the chemical addition device 40 is, for example, a device used to implement improvement control.

[0049] In the following, we will explain the case where the incineration system 100 has each of the temperature suppression device 20, the incineration ash removal device 30, and the chemical addition device 40, but the incineration system 100 may have at least one of the temperature suppression device 20, the incineration ash removal device 30, and the chemical addition device 40.

[0050] The temperature suppression device 20 is, for example, a water gun provided in the incinerator 1, and sprays water into the incinerator 1 (for example, the freeboard portion in the incinerator 1) to lower the temperature of the exhaust gas discharged from the incinerator 1. The temperature suppression device 20 is generally provided for the purpose of suppressing thermal stress on downstream equipment by lowering the exhaust gas temperature, and in this embodiment, the temperature suppression device 20 is used as a means for suppressing adhesion of incineration ash.

[0051] Specifically, the control device 10 calculates, for example, a prediction index X M is less than 2.0, the temperature suppression device 20 may be automatically operated so that the temperature in the vicinity of the outlet of the incinerator 1 is reduced to a predetermined temperature. M If the temperature suppression device 20 is less than 2.0, the temperature suppression device 20 may be manually operated so that the temperature near the outlet of the incinerator 1 is reduced to a predetermined temperature.

[0052] As a result, in the incineration system 100 of this embodiment, it is possible to prevent the heat exchanger 2 and line L1 from reaching high temperature ranges, and it is possible to suppress the adhesion of incineration ash to the heat exchanger 2 and line L1.

[0053] The incineration ash removal device 30 is, for example, an air blaster provided in the heat exchanger 2 or line L1, and removes the incineration ash adhering to the heat exchanger 2 or line L1 by spraying air into the heat exchanger 2 or line L1. The incineration ash removal device 30 is, for example, a dust scraping device provided in the heat exchanger 2 or line L1, and physically removes the incineration ash adhering to the heat exchanger 2 or line L1.

[0054] Specifically, the control device 10 calculates, for example, a prediction index X M is less than 2.0, the incineration ash removal device 30 may be automatically operated so that the incineration ash adhering to the heat exchanger 2 and the line L1 is removed. M If the difference is less than 2.0, the incineration ash removal device 30 may be manually operated so that the incineration ash adhering to the heat exchanger 2 and the line L1 is removed.

[0055] As a result, in the incineration system 100 in this embodiment, it becomes possible to locally or entirely remove the incineration ash adhering to the heat exchanger 2 or the line L1.

[0056] The chemical additive device 40 adds metal-containing chemicals (hereinafter also simply referred to as metal-containing chemicals) such as polyferric sulfate, polyaluminum chloride (PAC: Polyelectrolyte Aluminum Chloride) or hydrated lime to the sludge, for example, in order to lower the proportion of phosphorus contained in the incineration ash and raise the melting point of the incineration ash. As described above, the sludge to which the chemical additive device 40 adds a predetermined chemical (for example, a metal-containing chemical) is, for example, sludge generated in the process of water treatment, concentrated sludge, or dewatered sludge. In FIG. 4, the sludge before the chemical additive device 40 adds the metal-containing chemical is referred to as pre-addition sludge, and the sludge after the addition is referred to as post-addition sludge. The post-addition sludge is the material to be incinerated.

[0057] Specifically, the control device 10 calculates, for example, a prediction index X MIf the prediction index X calculated by the control device 10 is less than 2.0, the chemical agent adding device 40 may be automatically operated so that the metal-containing chemical agent is added to the incineration target. M If the value is less than 2.0, the chemical agent adding device 40 may be manually operated so that the metal-containing chemical agent is added to the material to be incinerated.

[0058] As a result, in the incineration system 100 of this embodiment, it is possible to suppress adhesion of incineration ash throughout the incineration system 100. Specifically, in the incineration system 100, for example, it is possible to suppress deterioration of the fluidity of the fluidized sand in the fluidized bed 1a. In addition, in the incineration system 100, it is possible to suppress the occurrence of blockages in the heat exchanger 2 and line L1. [Explanation of symbols]

[0059] 1: Incinerator 1a: Fluidized bed 2: Heat exchanger 3: Dust collector 4: Flue gas treatment tower 5: Chimney 10: Control device 20: Temperature suppression device 30: Ash removal device 40: Chemical addition device 100: Incineration system 200: Incineration system 300: Incineration system 400: Incineration system 500: Incineration system 600: Incineration system 700: Incineration system 800: Incineration system 900: Incineration system F1: Attraction machine L1: Line L2: Line L3: Line L11: Line L12: Line M: Measuring device

Claims

1. A method for predicting the adhesion state of incineration ash in at least one of an incinerator and a facility provided downstream of the incinerator, based on the amount of each component contained in the incineration ash generated by incineration of materials to be incinerated in the incinerator, measuring a first content of phosphorus, a second content of aluminum, a third content of calcium, a fourth content of magnesium, and a fifth content of iron contained in the incineration ash; A method for predicting the adhesion status of incineration ash, which calculates a ratio of the second inclusion amount to the product of the sum of the third inclusion amount, the fourth inclusion amount, and the fifth inclusion amount and the first inclusion amount as a prediction index of the adhesion status.

2. In the calculation step, the prediction index X is calculated according to formula (1). Ｍ The method for predicting the adhesion state of incineration ash according to claim 1, further comprising the steps of: X Ｍ =[Al ２ O ３ (mol)÷{CaO(mol)+MgO(mol)+Fe ２ O ３ (mol)}]÷(n×P ２ O ５ )(mol) ・・・Formula (1) n is an arbitrary integer.

3. Further, determining whether the predictive index is less than a threshold value, The method for predicting the adhesion state of incineration ash according to claim 1, wherein the threshold value is a value greater than 1.8 and less than 2.

7.

4. A method for predicting the adhesion status of incineration ash as described in claim 1, wherein in the calculating step, the predictive index is calculated without using a value for silicon dioxide contained in the incineration ash.

5. A method for dealing with adhesion of incineration ash in at least one of an incinerator and a facility provided downstream of the incinerator, based on the amount of each component contained in the incineration ash generated by incineration of materials to be incinerated in the incinerator, When the ratio of the amount of aluminum contained in the incineration ash to the product of the sum of the amount of calcium contained in the incineration ash, the amount of magnesium contained in the incineration ash, and the amount of iron contained in the incineration ash and the amount of phosphorus contained in the incineration ash is less than a threshold value, the method for dealing with adhesion of incineration ash includes at least one of the following controls: control for lowering the temperature of the exhaust gas discharged from the incineration; control for removing the incineration ash that has adhered to at least one of the incinerator and equipment installed downstream of the incinerator; and control for increasing the melting point of the incineration ash by adding a specified agent to the material to be incinerated.

6. An incinerator for incinerating materials to be incinerated; A control device that predicts the adhesion state of the incineration ash in at least one of the incinerator and the equipment installed downstream of the incinerator based on the amount of each component contained in the incineration ash generated by the incineration of the material to be incinerated in the incinerator; The control device includes: Identifying a first content of phosphorus, a second content of aluminum, a third content of calcium, a fourth content of magnesium, and a fifth content of iron contained in the incineration ash; An incineration system that calculates a ratio of the second inclusion amount to the product of the first inclusion amount and the sum of the third inclusion amount, the fourth inclusion amount, and the fifth inclusion amount as a predictive indicator of the adhesion status.

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