Waste combustion system, waste combustion power generation system, and wastewater treatment method

Abstract

To provide a garbage combustion system which is stabilized in a calorie obtained by the combustion of garbage by a simple constitution, a garbage combustion power generation system and a garbage sewage treatment method.SOLUTION: A garbage combustion system 10 comprises: a garbage combustion furnace 30; a garbage supply unit 80 for supplying garbage 2 into the garbage combustion furnace 30; a garbage sewage pit 35 for storing garbage sewage separated from the garbage 2 in the garbage supply unit 80; a water component measuring instrument 60 for measuring a water content of the garbage 2 in the garbage supply unit 80; a spray device 70 for spraying the garbage sewage stored in the garbage sewage pit 35 to the garbage 2; and a controller 90 for controlling the spray device 70 according to the water content of the garbage 2 measured by the water component measuring instrument 60.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a waste incineration system, a waste incineration power generation system, and a waste and wastewater treatment method. [Background technology]

[0002] Conventionally, waste incineration systems in which waste is burned are known. For example, in the waste incineration system disclosed in Patent Document 1, wastewater separated from waste to be burned in a waste receiving pit is stored in a wastewater pit. The stored wastewater is pumped up to a wastewater dispersion nozzle by a pump and then sprayed onto the waste in the waste receiving pit. The wastewater is treated together with the combustion of the waste. Also, in the waste incineration system disclosed in Patent Document 2, the temperature of the combustion exhaust gas from the waste incineration furnace is measured, and wastewater is sprayed into the furnace so that the temperature is constant. The wastewater is supplied to the spray nozzle via a wastewater treatment facility, a storage tank, a water supply pump, and a flow rate control valve in that order. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 5-118525 [Patent Document 2] Japanese Patent Application Publication No. 59-215512 Summary of the Invention [Problem to be solved by the invention]

[0004] However, if wastewater stored in a wastewater pit is sprayed onto the waste to be burned in the waste receiving pit in the manner disclosed in Patent Document 1, the moisture content of the waste may become unstable. As a result, the amount of heat obtained by burning the waste may become unstable. Furthermore, in Patent Document 2, the equipment for spraying wastewater from the waste into the furnace becomes complicated, which may increase the cost of the waste combustion system.

[0005] An object of the present disclosure is to provide a waste combustion system, a waste combustion power generation system, and a waste and wastewater treatment method that stabilize the amount of heat obtained by burning waste with a simple configuration. [Means for solving the problem]

[0006] A waste combustion system according to at least one embodiment of the present disclosure includes: A waste incinerator; a waste supply unit for supplying the waste to the waste incineration furnace; a wastewater pit for storing wastewater separated from the waste in the waste supply unit; a moisture meter for measuring the moisture content of the waste in the waste supply unit; A spraying device for spraying the wastewater stored in the wastewater pit onto the waste; and a controller for controlling the sprinkling device in accordance with the moisture content of the waste measured by the moisture meter.

[0007] A waste combustion power generation system according to at least one embodiment of the present disclosure includes: The waste incineration system; A waste heat boiler using the combustion gas generated in the waste incineration furnace as a heat source; A turbine configured to rotate using steam from the waste heat boiler as a driving source; and a generator configured to generate electricity by rotation of the turbine.

[0008] A method for treating wastewater according to at least one embodiment of the present disclosure includes: A waste incinerator; a waste supply unit for supplying the waste to the waste incineration furnace; A method for treating wastewater in a waste incineration system comprising: a wastewater pit for storing wastewater separated from the waste in the waste supply unit, the method comprising: measuring the moisture content of the waste in the waste supply unit; and a step of spraying the garbage wastewater stored in the garbage wastewater pit onto the garbage in accordance with the moisture content of the garbage measured in the measuring step. Effect of the Invention

[0009] According to the present disclosure, it is possible to provide a waste combustion system, a waste combustion power generation system, and a waste and wastewater treatment method that stabilize the amount of heat obtained by burning waste with a simple configuration. [Brief description of the drawings]

[0010] [Figure 1] 1 is a diagram showing a schematic configuration of a waste combustion power generation system according to an embodiment of the present disclosure. [Diagram 2] 13 is a flowchart illustrating a scattering process according to an embodiment of the present disclosure. [Diagram 3] 1 is a flowchart illustrating a learning process according to an embodiment of the present disclosure. [Figure 4A] FIG. 1 is a schematic diagram conceptually illustrating a waste combustion system according to one embodiment of the present disclosure. [Figure 4B] A schematic diagram conceptually illustrating a waste combustion system according to another embodiment of the present disclosure. [Figure 5A] FIG. 1 is a configuration diagram conceptually illustrating an input device according to an embodiment of the present disclosure. [Figure 5B] FIG. 13 is a schematic diagram illustrating a configuration of a feed device according to another embodiment of the present disclosure. [Figure 6] 1 is a block diagram showing an electrical configuration of a waste combustion power generation system according to an embodiment of the present disclosure. FIG. [Figure 7] 13 is a flowchart showing a scattering process according to another embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, some embodiments of the present disclosure will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of components described as the embodiments or shown in the drawings are merely illustrative examples and are not intended to limit the scope of the present disclosure. For example, expressions expressing relative or absolute configuration, such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial," not only strictly express such a configuration, but also express a state in which there is a relative displacement with a tolerance or an angle or distance to the extent that the same function is obtained. For example, expressions indicating that things are in an equal state, such as "identical," "equal," and "homogeneous," not only indicate a state of strict equality, but also indicate a state in which there is a tolerance or a difference to the extent that the same function is obtained. For example, expressions describing shapes such as a rectangular shape or a cylindrical shape do not only refer to rectangular shapes, cylindrical shapes, etc. in the strict geometric sense, but also refer to shapes that include uneven portions, chamfered portions, etc., to the extent that the same effect is obtained. On the other hand, the expressions "comprise", "include", or "have" a certain element are not exclusive expressions excluding the presence of other elements. In addition, the same components are denoted by the same reference numerals and the description thereof may be omitted.

[0012] <Overall configuration of waste incineration power generation system 1> Fig. 1 is a schematic diagram showing the configuration of a waste combustion power generation system according to an embodiment of the present disclosure. In the embodiment shown in Fig. 1, the waste combustion power generation system 1 includes a waste combustion system 10 and a power generation system 20 for generating power by utilizing heat generated by the combustion of waste by the waste combustion system 10.

[0013] In the illustrated embodiment, the waste incineration system 10 includes a waste incineration furnace 30 and a waste supply unit 80 for supplying waste 2 to the waste incineration furnace 30. The waste supply unit 80 stores the waste 2 brought in by, for example, a transport vehicle. The waste supply unit 80 includes, for example, a feeder 89 for transporting the waste 2 to the waste incineration furnace 30. Inside the waste incineration furnace 30, the waste 2 transported by a stoker 9 is combusted downstream of the transport path. The temperature of the combustion gas generated by the combustion is measured by the exhaust gas thermometer 4 while it flows through the flue 8. After the combustion gas has completed heat exchange with the waste heat boiler 22 described below, it is exhausted from the chimney 19 via the gas pipe 17 and the bag filter 18 in this order. The oxygen concentration of the combustion gas flowing through the gas pipe 17 is measured by the oxygen concentration meter 5.

[0014] The power generation system 20 includes a waste heat boiler 22 that uses exhaust gas generated in a waste incineration furnace 30 as a heat source, a turbine 24 configured to rotate using steam from the waste heat boiler 22 as a driving source, and a generator 25 configured to generate electricity by the rotation of the turbine 24.

[0015] The waste heat boiler 22 includes a heat transfer tube (not shown) provided in the flue 8. Water flowing through the heat transfer tube exchanges heat with the combustion gas flowing through the flue 8 and is changed into steam. The steam flows through a steam supply pipe 23 of the waste heat boiler 22 to a turbine 24. A steam flowmeter 6 for measuring the flow rate of the steam and a steam pressure gauge 7 for measuring the pressure of the steam are provided on the steam supply pipe 23. The steam that has passed through the turbine 24 is condensed in a condenser 26 and returned to water, and is supplied to the above-mentioned heat transfer tube.

[0016] A rotating shaft of a generator 25 is connected to the rotating shaft of the turbine 24. When the turbine 24 is rotated by steam supplied from the steam supply pipe 23, the generator 25 is driven. Electricity generated by the generator 25 is supplied to the power grid.

[0017] The amount of electricity generated by the waste incineration power generation system 1 varies depending on the amount of heat obtained by burning the waste 2. Therefore, to stabilize the amount of power generation, it is necessary to stabilize the amount of heat obtained by the waste incineration system 10. And to stabilize the amount of heat obtained, it is necessary that the moisture content of the waste 2 supplied to the waste incineration furnace 30 falls within a specified range. This is because waste 2 with a moisture content outside the specified range is excessively dry or excessively wet, and the amount of heat obtained by burning will be excessive or insufficient.

[0018] <Overview of the overall configuration of the waste incineration system 10> In addition to the above-mentioned waste incineration furnace 30 and waste supply unit 80, the waste incineration system 10 according to one embodiment further includes a waste sewage pit 35 for storing waste sewage separated from the waste 2 in the waste supply unit 80, a moisture meter 60 for measuring the moisture content of the waste 2 in the waste supply unit 80, a sprinkler 70 for sprinkling the waste sewage stored in the waste sewage pit 35 onto the waste 2, and a controller 90 for controlling the sprinkler 70 in accordance with the moisture content of the waste 2 measured by the moisture meter 60. The controller 90 may be realized by one arithmetic device, or may be realized by a plurality of arithmetic devices located at separate locations. A specific configuration of the controller 90 will be described later (see FIG. 6).

[0019] As an example, the controller 90 determines whether or not it is time for the sprinkler 70 to sprinkle garbage and wastewater based on the measurement result of the moisture meter 60. If it is determined that the timing has arrived, the controller 90 sends a control signal to the sprinkler 70 so as to sprinkle the garbage and wastewater. The amount of garbage and wastewater sprinkled by the sprinkler 70 may vary depending on the measurement result of the moisture meter 60, or may be the same regardless of the measurement result of the moisture meter 60. Also, instead of managing the amount of garbage and wastewater sprinkled, the time for sprinkling the garbage and wastewater may be managed.

[0020] According to the above configuration, wastewater is sprayed onto the waste 2 in the waste supply unit 80 according to the moisture content of the waste 2 measured by the moisture meter 60. This allows the moisture content of the waste 2 collected by, for example, a transport vehicle to the waste supply unit 80 and before being supplied to the waste incineration furnace 30 to be kept within a specified range. This stabilizes the amount of heat obtained by burning the waste 2. Furthermore, the configuration for keeping the moisture content of the wastewater in the waste supply unit 80 within a specified range is realized by the moisture meter 60 and the spraying device 70, so the configuration of the waste combustion system 10 can be simplified. As described above, the waste combustion system 10 is realized in a simple configuration that stabilizes the amount of heat obtained by burning the waste 2. Furthermore, the waste combustion power generation system 1 is realized in a simple configuration that stabilizes the amount of heat obtained by burning the waste 2.

[0021] In some embodiments, the controller 90 is configured to, when the moisture content of the waste 2 measured by the moisture meter 60 falls below a lower threshold, control the sprinkling device 70 so that the moisture content becomes equal to or greater than the lower threshold.

[0022] According to the above configuration, the moisture content of the waste 2 in the waste supply unit 80 is Lower Threshold If the waste 2 is dry enough to fall below the lower threshold, the controller 90 controls the spraying device 70 to spray wastewater, thereby making the moisture content of the waste 2 supplied to the waste incineration furnace 30 equal to or higher than the lower threshold. Therefore, the waste incineration system 10 can prevent the amount of heat obtained by burning the waste 2 from becoming excessive.

[0023] In some embodiments, the controller 90 is configured to increase the stoker speed of the waste incineration furnace 30 (i.e., the speed at which the stoker 9 transports the waste 2) when the moisture content of the waste 2 measured by the moisture meter 60 exceeds an upper threshold. As a more specific example, the controller 90 sends a control signal to the stoker drive unit 3 (see FIG. 6 ) that drives the stoker 9 to increase the stoker speed. As a result, when excessively wet waste 2 is supplied to the waste incineration furnace 30, the amount of waste 2 combusted in the waste incineration furnace 30 increases.

[0024] According to the above configuration, the moisture content of the waste 2 in the waste supply unit 80 is Upper Threshold If the waste 2 is moist enough to exceed this level, the amount of waste 2 to be burned increases. Therefore, the waste incineration system 10 can prevent a shortage of the amount of heat obtained by burning the waste 2.

[0025] In another embodiment, when the controller 90 sends a control signal to the stoker drive unit 3 to increase the stoker speed, the controller 90 may also send a control signal to the feeder 89 of the waste supply unit 80 to increase the supply speed of the waste 2. This makes it possible to prevent a shortage of the waste 2 available for combustion in the waste incinerator 30.

[0026] Furthermore, with the above-mentioned configuration, the moisture content of the waste 2 supplied to the waste incineration furnace 30 can be kept within a specified range between a lower threshold value and an upper threshold value, so that the amount of heat obtained by burning the waste 2 is stabilized. This stabilizes the amount of steam generated in the waste heat boiler 22, and stabilizes the rotation of the turbine 24. This stabilizes the amount of power generated by the generator 25.

[0027] <Spraying process according to one embodiment> 2 is a flowchart showing the spraying process according to an embodiment of the present disclosure. The control of the spraying device 70 and the stoker driving unit 3 by the controller 90 described above is executed, for example, as follows.

[0028] First, the controller 90 measures the moisture content of the waste 2 in the waste supply unit 80 based on the measurement result of the moisture meter 60 (S1). The controller 90 determines whether the moisture content obtained in S1 is below a lower threshold value (S3). If the moisture content is below the lower threshold value (S3: YES), it is time to spray the waste water. In this case, the controller 90 controls the spraying device 70 to spray the waste water (S5), and returns the process to S1. As the waste water is sprayed, the moisture content of the waste 2 in the waste supply unit 80 increases.

[0029] If the moisture content is equal to or greater than the lower threshold (S3: NO), it is determined whether the moisture content acquired in S1 exceeds the upper threshold (S7). If the moisture content exceeds the upper threshold (S7: YES), the controller 90 generates a control signal to increase the stoker speed (S9). This control signal is sent to the stoker driving unit 3, and the stoker speed increases. After that, the process returns to S1.

[0030] If the moisture content is equal to or lower than the upper threshold (S7: NO), the controller 90 returns the process to S1. While the moisture content measured in S1 is within the specified range (S3: NO, S7: NO), the processor 91 repeats S1, S3, and S7. The scattering process in one embodiment is performed while the waste combustion power generation system 1 is in operation.

[0031] <Determining the moisture content threshold of waste 2 using a learning model> In the embodiment shown in FIG. 1, the controller 90 is configured to control the power generation system 20 in addition to the waste combustion system 10. As a more specific example, the controller 90 is configured to control at least one process value (hereinafter, may be simply referred to as "process value") of the waste combustion power generation system 1. The process value is a value that can be determined based on the measurement results of a measuring instrument provided in the waste combustion power generation system 1. Examples of the process value include the temperature of the combustion gas measured by the exhaust gas thermometer 4, the oxygen concentration of the combustion gas measured by the oxygen concentration meter 5, the flow rate of steam measured by the steam flowmeter 6, or the pressure of steam measured by the steam pressure measuring instrument 7. The process value may be a value that is determined based on the measurement results of the measuring instrument and a specified relational expression.

[0032] The process value correlates with the amount of heat obtained by burning the waste 2. Therefore, it is possible to keep the process value within a target range by controlling the moisture content of the waste 2 supplied from the waste supply unit 80. To achieve this, it is necessary to determine lower and upper threshold values ​​for the moisture content of the waste 2 that correspond to the target range of the process value.

[0033] In some embodiments, the lower threshold and the upper threshold for the moisture content of the waste 2 are determined using a learning model. Specifically, the controller 90 includes a model creation unit 101 and a threshold determination unit 102.

[0034] The model creation unit 101 is configured to create a learning model that learns the relationship between the moisture content of the waste 2 measured by the moisture meter 60 and at least one process value of the waste incineration power generation system 1. The relationship between the moisture content and the process value can be empirically learned by an operator, but is difficult to mathematically express. In this example, the measured moisture content of the waste 2 and the measured process value are input to the learning model as learning data, and the above relationship is learned. As a more specific example, while the waste incineration power generation system 1 is started up by the operator's operation and is operating at a rated speed, the measured moisture content of the waste 2 and the measured process value are associated and input to the learning model. When the input is continuously performed, the learning model learns the relationship between the range of the process value controlled by the operator's operation and the range of the moisture content. In this way, a learning model that has completed learning is created.

[0035] The threshold determination unit 102 is configured to determine, based on the learning model created by the model creation unit 101, upper and lower thresholds for the moisture content of the waste 2 such that at least one process value falls within a target range.

[0036] For example, when the threshold value determination unit 102 inputs the target range (minimum and maximum values) of the process value received by the operator's input operation into the learning model, the learning model outputs the specified range (i.e., lower and upper threshold values) of the moisture content of the waste 2 corresponding to the input value. In this way, the lower and upper threshold values ​​of the moisture content of the waste 2 are determined. The controller 90 controls the sprinkler 70 based on the measurement results of the moisture meter 60 so that the moisture content of the waste 2 falls within the specified range determined by the lower and upper threshold values. In addition, when the target ranges of each of the multiple process values ​​are input into the learning model, the learning model outputs the range of the moisture content (minimum and maximum values) corresponding to each of the input target ranges. In other words, multiple ranges of the moisture content are output from the learning model. The threshold value determination unit 102 specifies a range that is included in common among the multiple output ranges as the specified range, and determines the lower and upper threshold values ​​of the moisture content based on the specified range.

[0037] According to the above configuration, the upper and lower thresholds of the moisture content that keep at least one process value within the target range are determined using a learning model. This makes it possible to automatically optimize the operating conditions of the waste-to-energy system 1 through control of the moisture content of the waste 2.

[0038] In another embodiment, the learning data input to the learning model may include the amount of waste supplied to the waste incineration furnace 30. The amount of waste supplied is an example of a parameter that correlates with the amount of heat obtained by burning the waste 2, and can be identified based on at least one of the transport speed of the waste 2 by the feeder 89 and the stoker speed. In this case, the learning model may learn the relationship between the moisture content of the waste 2, the amount of waste supplied, and at least one process value. At this time, the target range of the waste supply amount is input to the learning model that has completed learning, in addition to the target range of the process value.

[0039] <Learning process> 3 is a flowchart showing a learning process according to an embodiment of the present disclosure. The learning process is an example of a specific process for implementing the above-mentioned model creation unit 101 and threshold determination unit 102. The learning process is executed by the controller 90 while the waste combustion power generation system 1 is operating, for example, by an operator.

[0040] First, the controller 90 acquires the moisture content of the waste 2 based on the measurement results of the moisture measuring instrument 60B (S11). Next, the controller 90 acquires at least one process value (S13). For example, the controller 90 acquires the exhaust gas temperature, oxygen concentration, steam flow rate, and steam pressure as process values ​​based on the measurement results of the exhaust gas thermometer 4, oxygen concentration meter 5, steam flow meter 6, and steam pressure measuring instrument 7.

[0041] The controller 90 executes a machine learning process (S15). For example, the controller 90 inputs data in which the moisture content of the waste 2 acquired in S11 is associated with at least one process value acquired in S13 into the learning model as learning data. Next, the controller 90 judges whether the learning is completed or not (S17). The judgment criteria at this time are, for example, whether the supply amount of the waste 2 exceeds a specified value, whether the rate of change of the moisture content of the waste 2 falls below a specified value, whether the number of times S15 is executed exceeds a specified number of times, whether the elapsed time since the start of the learning process exceeds a specified time, whether the rated operation time of the waste combustion power generation system 1 exceeds a specified time, whether an end instruction is received from an operator, or a combination of these. For example, the supply amount of the waste 2 is specified based on the operation amount of at least one of the crane 75 and the stoker 9. The rate of change of the moisture content of the waste 2 is, for example, the rate of change (absolute value) of a representative value of the moisture content measured by the moisture meter 60 multiple times. As a more specific example, a moisture content test, which is a measurement of the moisture content over a certain period of time, is performed multiple times, and the maximum, minimum, or deviation between the maximum and minimum values ​​of the moisture content is obtained as a representative value of the moisture content in each moisture content test. If the rate of change of the representative value of the moisture content over time falls below a specified value, it is determined that learning is complete. The number of times S15 has been performed, the elapsed time since the start of the learning process, and the rated operating time of the waste-to-energy system 1 can also be determined to be complete by comparing them with the above-mentioned specified values.

[0042] The controller 90 repeats S11 to S17 until learning is completed (S17: NO). When it is determined that learning is completed (S17: YES), the controller 90 sets the learning model used in S15 to a learning model that has learned the relationship between the moisture content of the waste 2 and at least one process value (S19). The controller 90 that executes the above steps S11 to S19 functions as an example of the model creation unit 101 described above.

[0043] Next, the controller 90 determines the lower and upper thresholds for the moisture content of the waste 2 (S21), and ends the learning process. For example, while the waste-incineration power generation system 1 is operating at rated speed as operated by the operator, the controller 90 accepts input of target ranges for process values ​​from the operator. The accepted target ranges are input to the learning model set in S19. The learning model outputs the range of moisture content corresponding to each input, and the controller 90 determines the specified range. This determines the lower and upper thresholds for the moisture content of the waste 2. The controller 90 that executes S21 functions as an example of the threshold value determining unit 102 described above.

[0044] After the learning process is completed, the controller 90 executes the above-mentioned scattering process (see FIG. 2). The learning process may be executed periodically while the scattering process is being executed by the controller 90. In this case, the lower and upper threshold values ​​of the moisture content of the waste 2 for keeping the process value within the target range may be updated periodically.

[0045] <Details of the configuration common to the waste incineration systems 10A and 10B (10)> The configuration of the waste incineration system 10 will be described in further detail with reference to FIGS. 4A and 4B. Fig. 4A is a schematic diagram showing a waste incineration system according to one embodiment of the present disclosure, and Fig. 4B is a schematic diagram showing a waste incineration system according to another embodiment of the present disclosure. In the embodiment shown in FIG. 4A and FIG. 4B, the waste incineration system 10A, 10B (10) includes a waste supply unit 80A, 80B (80) having a waste hopper 82A, 82B (82) and a waste pit 85A, 85B (85). eachThe waste hopper 82 is configured to receive the waste 2 to be supplied to the waste incineration furnace 30. In this example, the above-mentioned feeder 89 is provided at the bottom of the waste hopper 82, which communicates with the waste incineration furnace 30. The waste pit 85 is configured to store the waste 2 before it is fed into the waste hopper 82. The waste 2 stored in the waste pit 85 is collected, for example, by a transport vehicle. The collected waste 2 may be a mixture of relatively wet waste 2 and relatively dry waste 2.

[0046] The moisture meters 60A, 60B of the waste incineration systems 10A, 10B (10) each include at least one first moisture meter 61A, 61B (61) and at least one second moisture meter 62A, 62B (62). The first moisture meter 61 is configured to measure the moisture content of the waste 2 in the waste hopper 82. The second moisture meter 62 is configured to measure the moisture content of the waste 2 in the waste pit 85. The measurement results of the first moisture meter 61 and the second moisture meter 62 are sent to the controllers 90A, 90B (90).

[0047] Moreover, the sprinklers 70A, 70B (70) of the waste combustion systems 10A, 10B (10) are configured to sprinkle wastewater onto the waste 2 in the waste hopper 82. For example, when the controller 90 transmits a control signal to the sprinkler 70 in response to the measurement results of the first moisture meter 61 and the second moisture meter 62, the wastewater is sprinkled.

[0048] In other embodiments, the moisture meter 60 does not have to include the second moisture meter 62. Also, the moisture meter 60 does not have to include the first moisture meter 61. In this case, the target onto which the garbage wastewater is sprayed by the spraying device 70 may be garbage 2 in the garbage pit 85.

[0049] <Details of the configuration of the waste incineration system 10A(10)> The configuration of the waste incineration system 10A will be described in detail with reference to FIG. 4A. In the illustrated embodiment, the garbage wastewater pit 35A (35) of the garbage combustion system 10A is configured to collect garbage wastewater separated from the garbage 2 in the garbage pit 85A and the garbage 2 in the garbage hopper 82A. As a more specific example, the lower part of the garbage pit 85A and the lower part of the garbage hopper 82A are each provided with an outlet 36 for the garbage wastewater to flow out, and the garbage wastewater flowing out from each outlet 36 is collected in the garbage wastewater pit 35A.

[0050] According to the above-mentioned configuration, the wastewater contained in the waste 2 stored in the waste pit 85A and the wastewater contained in the waste 2 stored in the waste hopper 82A are collected and dispersed by the dispersion device 70A. This allows the wastewater generated in the waste incineration system 10A to be collected without waste and is effectively utilized to stabilize the amount of heat generated in the waste incineration furnace 30.

[0051] In the illustrated embodiment, the waste incineration system 10A includes a crane 75 for transferring the waste 2 in the waste pit 85A to the waste hopper 82A. The crane 75 in this example grasps and lifts the waste 2 in the waste pit 85A, and moves it to above the waste hopper 82A. The crane 75 then releases the waste 2, which is then dumped from above into the waste hopper 82A. The crane 75 may be operated by an operator's operation command, or may be controlled by a controller 90. A It may also operate automatically under control of

[0052] The moisture meter 60A in one embodiment includes two first moisture meters 61A. One of the first moisture meters 61A is an infrared camera provided on the upper part of the wall of the garbage hopper 82A, and measures the moisture content of the surface layer of the garbage 2 in the garbage hopper 82A. The distribution of the moisture content of the surface layer of the garbage 2 can be determined from the image captured by the infrared camera. The other first moisture meter 61A is a microwave meter provided on the lower part of the wall of the garbage hopper 82A, and measures the moisture content of the garbage 2 transported by the feeder 89, for example.

[0053] The spraying device 70A of one embodiment includes a spray nozzle 71A for spraying garbage and wastewater, and a supply pipe 72A for supplying garbage and wastewater stored in the garbage and wastewater pit 35A to the spray nozzle 71A. The supply pipe 72A supplies garbage and wastewater pumped up by, for example, a pump to the spray nozzle 71A.

[0054] In one embodiment, the controller 90A determines the moisture content of the waste 2 in the waste hopper 82A based on the measurement results of each of the two first moisture meters 61A. For example, the moisture content of the waste 2 in the waste hopper 82A is determined by substituting the measurement results of each of the first moisture meters 61A and the second moisture meters 62A into a specified calculation formula. When the determined moisture content is Lower Threshold If the moisture content is below Lower Threshold The controller 90A controls the sprinkling device 70A so that the above occurs. By sprinkling the garbage and wastewater, the moisture content of the garbage 2 increases.

[0055] According to the above configuration, the spraying device 70A sprays wastewater in accordance with the moisture content of the waste 2 in the waste hopper 82A measured by the first moisture meter 61A. This makes it possible to reduce the difference between the moisture content of the waste 2 supplied to the waste incineration furnace 30 and the moisture content determined by measurement. In particular, by having multiple first moisture meters 61A measure the moisture content of different pieces of waste 2, the accuracy of the moisture content of the waste 2 determined by measurement is improved, and the above difference can be further reduced. Therefore, the waste incineration system 10A can further stabilize the amount of heat obtained from the burned waste 2.

[0056] Moreover, the target onto which the wastewater is sprayed by the spraying device 70A is the waste 2 stored in the waste pit 85A. According to the above configuration, the wastewater is sprayed onto the waste 2 in the waste hopper 82A in accordance with the moisture content of the waste 2 in the waste hopper 82A measured by the first moisture meter 61A. This makes it possible to further reduce the difference between the moisture content of the waste 2 supplied to the waste incineration furnace 30 and the moisture content measured by the first moisture meter 61A, for example, compared to the case where wastewater is sprayed onto the waste 2 stored in the waste pit 85A. Therefore, by controlling the moisture content of the waste 2, the amount of heat obtained by burning the waste 2 and the amount of power generated based on that amount of heat can be adjusted with high precision.

[0057] In another embodiment, the moisture meter 60A does not need to include either of the two first moisture meters 61A. A In addition, the garbage sewage may be sprayed onto the garbage 2 in the garbage pit 85A in response to an operation instruction from an operator who has confirmed the measurement result of the first moisture measuring device 61A. Also, the number of first moisture measuring devices 61A may be three or more. The moisture measuring device 60A does not have to include the first moisture measuring device 61A.

[0058] The moisture measuring instrument 60A in one embodiment further includes two second moisture measuring instruments 62A. One of the second moisture measuring instruments 62A is an infrared camera provided on the upper part of the wall of the garbage pit 85A, and measures the moisture content of the surface layer of the garbage 2 in the garbage pit 85A. The other second moisture measuring instrument 62A is a microwave measuring instrument provided on the crane 75, and measures the moisture content of the garbage 2 held by the crane 75.

[0059] In one embodiment, the controller 90A controls the sprinkling device 70A so that the garbage / wastewater is sprinkled in accordance with the measurement result of the second moisture meter 62A in addition to the measurement result of the first moisture meter 61A. For example, Lower ThresholdIf the moisture content falls below this value, there is a risk that excessively dry waste 2 will be supplied to the waste incinerator 30 in the future, and there is a risk that the amount of heat obtained by combustion will be excessive. In this case, the spreader 70A spreads the waste wastewater onto the waste 2 in the waste hopper 82A in response to a control signal from the controller 90A, thereby increasing the moisture content of the waste 2 in the waste hopper 82A and suppressing the future supply of excessively dry waste 2. The spreader 70A may spread the waste wastewater either before or after the crane 75 throws in the waste 2.

[0060] According to the above configuration, the sprinkler 70A can sprinkle wastewater onto the waste 2 in the waste hopper 82A according to the moisture content of the waste 2 in the waste pit 85A, which can prevent the moisture content of the waste 2 supplied to the waste incineration furnace 30 from becoming inappropriate in the future. In an embodiment in which the waste supply unit 80A includes a waste pit 85A in addition to the waste hopper 82A, the moisture content of the waste 2 in the waste hopper 82A, which has a relatively short waiting time before being supplied to the waste incineration furnace 30, falls within a specified range. This can further stabilize the amount of heat obtained by burning the waste 2.

[0061] In another embodiment, the second moisture meter 62A provided on the crane 75 may be an infrared camera that measures the moisture content of the surface layer of the waste 2 in the waste pit 85A. In this case, the operator may measure the moisture content of the surface layer of the waste 2 in the waste pit 85A by the sprinkling device 70. A may be controlled. As a more specific example, the operator identifies the distribution of the moisture content of the garbage 2 in the garbage pit 85A from images captured by the infrared camera while the crane 75 is moving. After that, the operator determines the moisture content of the garbage 2 in the garbage hopper 82A from the measurement result of the first moisture meter 61A, and has the crane 75 grasp the garbage 2 having a moisture content suitable for being thrown into the garbage hopper 82A. This allows the moisture content of the garbage 2 in the garbage hopper 82A to be optimized. In this case, the moisture meter 60A does not need to include the second moisture meter 62A provided in the garbage pit 85A. Moreover, the above-mentioned operations of the operator may be automatically executed by the controller 90A. In this case, the crane 75 is automatically operated under the control of the controller 90A.

[0062] <Details of the configuration of the waste combustion system 10B(10)> The configuration of the waste incineration system 10B will be described with reference to FIG. 4B. In the illustrated embodiment, a garbage pit 85B (85), a garbage and wastewater pit 35B (35), a sprinkler 70B (70), and a garbage hopper 82B (82) are arranged in this order from the top in the vertical direction.

[0063] In this example, a discharge port 88 for discharging the waste 2 is provided at the bottom of the waste pit 85B, and a waste hopper 82 is provided at the bottom of the waste pit 85B. B is provided with an inlet 38 for receiving the garbage 2 to be thrown inside.

[0064] The waste incineration system 10B according to one embodiment includes an input device 110 provided below the discharge outlet 88 of the waste pit 85B. The input device 110 is configured to input the waste 2 discharged from the discharge outlet 88 into the input port 38 of the waste hopper 82B by utilizing the weight of the waste 2 itself.

[0065] The input device 110 in this example constitutes a part of the waste pit 85B, and temporarily stores the waste 2 discharged from the discharge outlet 88. The input device 110 is also configured to input the waste 2 into the waste hopper 82B in response to a control signal sent from the controller 90B. A detailed description of the input device 110 will be given later (see FIGS. 5A and 5B).

[0066] According to the above configuration, the input device 110 can input the waste 2 discharged from the discharge port 88 of the waste pit 85B into the input port 38 of the waste hopper 82B by utilizing its own weight. Therefore, the input device 110 does not need to transport the waste 2 upwards and can operate with little power.

[0067] The above-mentioned garbage and wastewater pit 35B is configured to store garbage and wastewater in a vertical position between the discharge outlet 88 and the input port 38 (more specifically, in a vertical position between the input device 110 and the input port 38). Garbage and wastewater separated from the garbage 2 stored in the garbage pit 85B is stored in the garbage and wastewater pit 35. The garbage and wastewater pit 35B also includes a drain outlet 31 configured to drain the garbage and wastewater. The garbage and wastewater pit 35B is provided with a wastewater volume meter 68 for measuring the amount of garbage and wastewater stored therein. The wastewater volume meter 68 is, for example, a water level gauge. The spraying device 70B is provided below the drain outlet 31, and is configured to spray the garbage and wastewater into the garbage hopper 82 by utilizing the weight of the garbage and wastewater. B The spraying device 70B is configured to spray the garbage 2 inside the garbage 2. As an example, a spraying nozzle 71B of the spraying device 70B is connected to the drain outlet 31 of the garbage wastewater pit 35B.

[0068] According to the above-mentioned configuration, the sprinkler 70B can sprinkle garbage and wastewater without pumping it up, and therefore the sprinkler 70B can be simplified in configuration and can operate with less power.

[0069] The moisture meter 60B includes a first moisture meter 61B (61) for measuring the moisture content of the waste 2 in the waste hopper 82B, and a second moisture meter 62B (62) for measuring the moisture content of the waste 2 in the waste pit 85B. The first moisture meter 61B is a microwave meter for detecting the moisture content of the waste 2 near the input port 38. The second moisture meter 62B is a microwave meter for detecting the moisture content of the waste 2 in the waste pit 85B. B It is a microwave measuring instrument that measures the moisture content of the waste 2 stored by the input device 110 that constitutes part of the waste storage facility.

[0070] In another embodiment, the first moisture meter 61B may be an infrared camera provided on the upper part of the wall of the garbage pit 85B. Also, the moisture meter 60B does not have to include the second moisture meter 62B.

[0071] The controller 90B controls the input device 110 so that the waste 2 is input into the input port 38 of the waste hopper 82B when the input condition is met. The input condition may be, for example, when the moisture content of the waste 2 measured by the first moisture meter 61B falls below a lower threshold and the moisture content of the waste 2 measured by the second moisture meter 62B falls below a lower threshold. 2 The moisture content of the wastewater is greater than the lower threshold value and is stored in the wastewater pit 35B. Amount of The condition is that the amount of the waste 2 having a relatively high moisture content is equal to or less than a predetermined amount. B By putting the garbage into the garbage hopper, B The moisture content of the waste 2 increases. As an example, the controller 90B determines whether the amount of wastewater stored in the waste pit 85B is equal to or less than a predetermined amount based on the measurement result of the wastewater amount meter 68.

[0072] According to the above configuration, even if there is a need to increase the moisture content of the garbage 2 in the garbage hopper 82B but there is a shortage of garbage wastewater stored in the garbage pit 85B, the moisture content of the garbage 2 in the garbage hopper 82B can be increased to above the lower threshold value by using garbage 2 in the garbage pit 85B (as a more specific example, garbage 2 stored in the feeding device 110) that has a moisture content above the specified threshold value.

[0073] When the spraying condition is met, the controller 90B controls the garbage and wastewater pit 35 B The sprinkling device 70B is controlled so that the garbage and wastewater stored in the garbage and wastewater pit 35B is sprinkled. The sprinkling condition is, for example, when the moisture content of the garbage 2 measured by the first moisture meter 61B falls below a lower limit threshold and when the moisture content of the garbage and wastewater stored in the garbage and wastewater pit 35B falls below a lower limit threshold. Amount of This is the condition where the amount of garbage in the garbage pit exceeds the specified amount. B Even if the moisture content of the garbage 2 inside falls below the lower threshold, the moisture content can be increased to above the lower threshold by spraying garbage wastewater.

[0074] <Details of the configuration of the input device 110> Specific configurations of the input devices 110A and 110B (110) will be described with reference to Fig. 5A and Fig. 5B. Fig. 5A is a schematic diagram of an input device according to one embodiment of the present disclosure. Fig. 5B is a schematic diagram of an input device according to another embodiment of the present disclosure.

[0075] In the embodiment shown in Figures 5A and 5B, the input device 110 includes storage sections 115A, 115B (115) for temporarily storing the garbage 2 discharged from the discharge outlet 88 of the garbage pit 85B. The upper part of the storage section 115 is, for example, an openable door. The storage section 115 is connected to the garbage / sewage pit 35B, and a lower wall section 118 of the storage section 115 forms an upper wall section of the garbage / sewage pit 35B. The lower wall section 118 according to one embodiment is provided with a plurality of holes (not shown) through which the garbage / sewage can pass.

[0076] In the embodiment shown in Fig. 5A, the storage section 115A (115) of the input device 110A is configured so that the lower wall section 118 rotates in response to the driving of the actuator. By the rotation of the lower wall section 118, the lower part of the storage section 115A is partially opened, and the garbage 2 is discharged and falls. The garbage and wastewater pit 35B may also rotate together with the lower wall section 118.

[0077] In the embodiment shown in Fig. 5B, one side of the storage section 115B (115) of the input device 110B (110) in the horizontal direction is open. The input device 110B also includes a push-out section 112 configured to move horizontally inside the storage section 115B by being driven by an actuator (not shown). The moving push-out section 112 ejects and drops the waste 2 stored in the storage section 115B.

[0078] <Electrical configuration of waste combustion power generation system 1> Fig. 6 is a block diagram showing the electrical configuration of a waste combustion power generation system according to an embodiment of the present disclosure. Fig. 6 illustrates a block diagram of a waste combustion power generation system 1 including a waste combustion system 10B.

[0079] The processor 91, which is a component of the controller 90B (90), is configured to read a specified program stored in a ROM 92, load it into a RAM 93, and execute instructions included in the loaded program. The processor 91 is a CPU, a GPU, an MPU, a DSP, various other arithmetic devices, or a combination of these. The processor 91 may be realized by an integrated circuit such as a PLD, an ASIC, an FPGA, and an MCU. A memory 94 electrically connected to the processor 91 stores data to be processed in conjunction with the execution of the program and a learning model for machine learning. The memory 94 is configured to non-temporarily store data, and is, for example, one or more flash memories.

[0080] The processor 91 is also electrically connected to an input / output interface 95. The input / output interface 95 is electrically connected to each of the flue gas thermometer 4, the oxygen concentration meter 5, the steam flow meter 6, the steam pressure meter 7, the first moisture meter 61B (61), the second moisture meter 62B (62), and the wastewater volume meter 68. The measurement results of each of these meters are sent to the processor 91. The input / output interface 95 is electrically connected to each of the spraying device 70B, the input device 110, and the stoker driving unit 3. The processor 91 is configured to send control signals to each of these devices.

[0081] <Spraying process according to another embodiment> 7 is a flowchart showing a scattering process according to another embodiment of the present disclosure. The scattering process is a process for keeping the moisture content of the waste 2 in the waste supply unit 80 within a specified range determined by the learning process. When the moisture content of the waste 2 falls within the specified range, the process value of the waste combustion power generation system 1 falls within a target range. The scattering process is executed by the controller 90 (more specifically, the processor 91). In the following description, the scattering process in the waste combustion power generation system 1 including the waste combustion system 10B (see FIG. 4B) will be illustrated.

[0082] First, the controller 90 measures the moisture content of the waste 2 in the waste supply unit 80B (S30). For example, the controller 90 obtains the moisture content of the waste 2 in the waste hopper 82B based on the measurement result of the first moisture meter 61B, and obtains the moisture content of the waste 2 in the waste pit 85B based on the measurement result of the second moisture meter 62B. Next, the controller 90 determines whether the moisture content of the waste 2 measured by the first moisture meter 61B in S30 (hereinafter also referred to as the "first measurement value") is below a lower threshold value (S31). If the first measurement value is below the lower threshold value (S31: YES), the controller 90 determines the moisture content of the wastewater stored in the wastewater pit 35B based on the measurement result of the wastewater volume meter 68. Amount of It is determined whether the amount of stored garbage wastewater specified by the measurement result of the garbage amount meter 68 exceeds the predetermined amount (S33). If the amount of stored garbage wastewater specified by the measurement result of the garbage amount meter 68 exceeds the predetermined amount (S33: YES), the above-mentioned spraying condition is satisfied. In this case, the controller 90 controls the spraying device 70B so that the garbage wastewater is sprayed onto the garbage 2 in the garbage pit 85B (S35). This makes it possible to prevent the moisture content of the garbage 2 supplied to the garbage incinerator 30 from falling below the lower threshold.

[0083] When the amount of wastewater stored, as determined by the measurement result of the wastewater volume meter 68, is equal to or less than a predetermined amount (S33: NO), the controller 90 determines whether the moisture content of the waste 2 measured by the second moisture meter 62B in S30 (hereinafter also referred to as the "second measurement value") exceeds a specified threshold (S37). When the second measurement value exceeds the specified threshold (S37: YES), the above-mentioned input condition is met. In this case, the controller 90 controls the input device 110 to input the waste 2 stored in the input device 110 into the input port 38 of the waste hopper 82B (S39). This reduces the moisture content of the waste 2 in the waste hopper 82B, and prevents the moisture content of the waste 2 supplied to the waste incinerator 30 from falling below the lower limit threshold.

[0084] If the moisture content of the waste 2 measured by the second moisture meter 62B is equal to or lower than the specified threshold (S37: NO), there is no remaining means for increasing the moisture content of the waste 2 in the waste hopper 82B in this example, so the controller 90 ends the scattering process. At this time, the controller 90 may execute a notification process directed to the operator. Then, the waste combustion power generation system 1 may switch from automatic operation to manual operation by the operator.

[0085] When the first measurement value is equal to or greater than the lower threshold (S31: NO), the controller 90 determines whether or not the first measurement value exceeds the upper threshold (S41). When the first measurement value is equal to or less than the upper threshold (S41: NO), the controller 90 returns the process to S30. While the moisture content measured by the first moisture meter 61B is equal to or greater than the lower threshold and equal to or less than the upper threshold, the controller 90 repeats S31 and S41.

[0086] When the first measurement value exceeds the upper limit threshold (S41: YES), the controller 90 generates an instruction to increase the stoker speed (S43). The generated instruction (control signal) is sent to the stoker driving unit 3, thereby increasing the stoker speed. This prevents the amount of heat obtained by burning the waste 2 from becoming excessively low.

[0087] Next, the controller 90 judges whether the second measurement value is below the upper threshold value (S45). If the second measurement value is below the upper threshold value (S45: YES), the controller 90 executes S39 described above. On the other hand, if the second measurement value is equal to or greater than the upper threshold value (S45: NO), the input device 110 starts inputting the waste 2 into the waste hopper 82. B Since there is a risk of causing an excessive increase in the moisture content of the waste 2 inside, the controller 90 returns the process to S30 without executing S39.

[0088] In another embodiment, the above-mentioned scattering process may be executed in the waste combustion system 10A. Also, the scattering process may be executed by manual operation by an operator. In this case, the lower and upper thresholds for the moisture content of the waste 2 may be determined by the operator, and the scattering process may be executed based on the determined lower and upper thresholds. In other words, a learning model does not need to be created.

[0089] <Summary> The contents described in the above-mentioned embodiments can be understood, for example, as follows.

[0090] 1) At least one embodiment of the waste incineration system (10) according to the present disclosure includes: A waste incineration furnace (30); a waste supply unit (80) for supplying waste (2) to the waste incineration furnace (30); a wastewater pit (35) for storing wastewater separated from the waste (2) in the waste supply unit (80); a moisture meter (60) for measuring the moisture content of the waste (2) in the waste supply unit (80); a spraying device (70) for spraying the wastewater stored in the wastewater pit (35) onto the waste (2); a controller (90) for controlling the sprinkling device (70) in accordance with the moisture content of the waste (2) measured by the moisture meter (60); Equipped with.

[0091] According to the configuration of 1) above, the waste sewage is sprayed onto the waste (2) in the waste supply unit (80) in accordance with the moisture content of the waste (2) measured by the moisture meter (60). This allows the moisture content of the waste (2) collected by, for example, a transport vehicle to the waste supply unit (80) and before being supplied to the waste incineration furnace (30) to be kept within a specified range. This stabilizes the amount of heat obtained from the waste (2) to be burned. In addition, the configuration for keeping the moisture content of the waste sewage in the waste supply unit (80) within the specified range is achieved by the moisture meter (60) and the spraying device (70), which simplifies the configuration of the waste incineration system (10). As described above, a waste incineration system (10) is realized that has a simple configuration and stabilizes the amount of heat obtained from the waste (2) to be burned.

[0092] 2) In some embodiments, the waste combustion system (10) described in 1) above, The controller (90) is configured to control the spraying device (70) so that, when the moisture content of the waste (2) measured by the moisture meter (60) falls below a lower threshold, the controller (90) controls the spraying device (70) so that the moisture content becomes equal to or greater than the lower threshold.

[0093] According to the above configuration 2), the moisture content of the waste (2) supplied to the waste incineration furnace (30) can be made equal to or higher than the lower threshold value. Therefore, the waste incineration system (10) can prevent the amount of heat obtained by burning the waste (2) from becoming excessive.

[0094] 3) In some embodiments, the waste combustion system (10) described in 2) above, The controller (90) When the moisture content of the waste (2) measured by the moisture meter (60) exceeds an upper threshold value, the stoker speed of the waste incinerator (30) is increased.

[0095] According to the above configuration 3), when the moisture content of the waste (2) measured by the moisture meter (60) exceeds an upper threshold, the amount of the waste (2) to be burned increases. Thus, the waste combustion system (10) can prevent a shortage of heat obtained by burning the waste (2).

[0096] 4) In some embodiments, the waste combustion system (10) described in any one of 1) to 3) above, The waste supply unit (80) includes a waste hopper (82) configured to receive the waste (2) to be supplied to the waste incinerator (30); The moisture meter (60) includes a first moisture meter (61) for measuring the moisture content of the waste (2) in the waste hopper (82).

[0097] According to the above configuration 4), the spraying device (70) sprays the waste water in accordance with the moisture content of the waste (2) in the waste hopper (82) measured by the first moisture meter (61). This makes it possible to reduce the difference between the moisture content of the waste (2) supplied to the waste incineration furnace (30) and the moisture content determined by the measurement. Thus, the waste incineration system (10) can further stabilize the amount of heat obtained by burning the waste (2).

[0098] 5) In some embodiments, the waste combustion system (10) described in 4) above, The sprinkler device (70) is configured to sprinkle the wastewater onto the waste (2) in the waste hopper (82).

[0099] According to the above configuration 5), the waste sewage is sprayed onto the waste (2) in the waste hopper (82) in accordance with the moisture content of the waste (2) in the waste hopper (82) measured by the first moisture meter (61). This makes it possible to further reduce the difference between the moisture content of the waste (2) supplied to the waste incineration furnace (30) and the moisture content measured by the first moisture meter (61).

[0100] 6) In some embodiments, the waste combustion system (10) described in 5) above, The waste supply unit (80) includes a waste pit (85) for storing the waste (2) before it is fed into the waste hopper (82); The moisture meter (60) includes a second moisture meter (62) for measuring the moisture content of the waste (2) in the waste pit (85).

[0101] According to the configuration of 6) above, the sprinkler (70) can sprinkle wastewater onto the waste (2) in the waste hopper (82) in accordance with the moisture content of the waste (2) in the waste pit (85), which prevents the moisture content of the waste (2) supplied to the waste incineration furnace (30) from becoming inappropriate in the future. In an embodiment in which the waste supply unit (80) includes a waste pit (85) in addition to the waste hopper (82), the moisture content of the waste (2) in the waste hopper (82), which has a relatively short waiting time before being supplied to the waste incineration furnace (30), falls within a specified range. This makes it possible to further stabilize the amount of heat obtained by burning the waste (2).

[0102] 7) In some embodiments, the waste combustion system (10) described in any one of 1) to 6) above, The waste supply unit (80) comprises: a waste hopper (82) configured to receive the waste (2) to be supplied to the waste incineration furnace (30); a garbage pit (85) for storing the garbage (2) before it is thrown into the garbage hopper (82); the sprinkler (70) is configured to sprinkle the wastewater onto the waste (2) in the waste hopper (82); The garbage and wastewater pit (35) is configured to collect the garbage and wastewater separated from the garbage (2) in the garbage pit (85) and the garbage (2) in the garbage hopper (82).

[0103] According to the above configuration 7), the wastewater contained in the waste (2) in the waste pit (85) and the wastewater contained in the waste (2) in the waste hopper (82) are collected and spread by the spreader (70). This allows the wastewater generated in the waste combustion system (10) to be collected without waste and is effectively used to stabilize the amount of heat obtained by burning the waste (2).

[0104] 8) In some embodiments, the waste combustion system (10) described in any one of 1) to 7) above, The waste supply unit (80) comprises: a waste pit (85) configured to store the waste (2); a waste hopper (82) configured to receive the waste (2) to be supplied to the waste incineration furnace (30); an input device (110) provided below the discharge opening (88) of the garbage pit (85) for inputting the garbage (2) discharged from the discharge opening (88) into the input opening (38) of the garbage hopper (82) by utilizing the weight of the garbage (2); Includes.

[0105] According to the configuration of 8) above, the throwing device (110) can throw the waste (2) discharged from the discharge opening (88) of the waste pit (85) into the throwing opening (38) of the waste hopper (82) by utilizing the weight of the waste (2). Therefore, the throwing device (110) does not need to transport the waste (2) upward, and can operate with little power.

[0106] 9) In some embodiments, the waste combustion system (10) described in 8) above, the garbage / sewage pit (35) stores the garbage / sewage at a vertical position between the discharge opening (88) and the input opening (38), and includes a drain opening (31) configured to drain the garbage / sewage; The sprinkler device (70) is provided below the drain outlet (31) and is configured to sprinkle the garbage and wastewater onto the garbage (2) in the garbage hopper (82) by utilizing the garbage and wastewater's own weight.

[0107] According to the configuration of 9) above, the sprinkler (70) can sprinkle the garbage and wastewater without pumping it up, and therefore the sprinkler (70) can be simplified in configuration and can be operated with less power.

[0108] 10) In some embodiments, the waste combustion system (10) described in 8) or 9) above, The moisture meter (60) a first moisture meter (61) for measuring the moisture content of the waste (2) in the waste hopper (82); a second moisture meter (62) for measuring the moisture content of the waste (2) in the waste pit (85); The controller (90) The moisture content of the waste (2) measured by the first moisture meter (61) falls below a lower threshold value, The moisture content of the waste (2) measured by the second moisture meter (62) exceeds a specified threshold value that is equal to or greater than the lower limit threshold value, and When the amount of the garbage and wastewater stored in the garbage and wastewater pit (35) is equal to or less than a predetermined amount, The waste hopper (82) is configured to control the waste feeding device (110) so as to feed the waste (2) stored in the waste pit (85) into the feed opening (38) of the waste hopper (82).

[0109] According to the configuration 10) above, even if there is a need to increase the moisture content of the garbage (2) in the garbage hopper (82) but there is an insufficient amount of garbage and wastewater stored in the garbage pit (85), the moisture content of the garbage (2) in the garbage hopper (82) can be increased to or above the lower threshold value by using the garbage (2) in the garbage pit (85) having a moisture content exceeding the upper threshold value.

[0110] 11) The waste combustion power generation system (1) according to at least one embodiment of the present disclosure is A waste incineration system (10) according to any one of 1) to 10) above; a waste heat boiler (22) using combustion gas generated in the waste incineration furnace (30) as a heat source; a turbine (24) configured to rotate using steam from the waste heat boiler (22) as a driving source; a generator (25) configured to generate electricity by rotation of the turbine (24); Equipped with.

[0111] The configuration of 11) above provides a waste combustion power generation system (1) that stabilizes the amount of heat obtained by burning the waste (2) with a simple configuration for the reasons described above. In addition, the stabilization of the amount of heat obtained by burning the waste (2) stabilizes the amount of steam generated from the waste heat boiler (22) and stabilizes the rotation of the turbine (24). This stabilizes the amount of power generated by the generator (25).

[0112] 12) In some embodiments, the waste combustion power generation system (1) described in 11) above, The controller (90) a model creation unit (101) that creates a learning model that learns the relationship between the moisture content of the waste (2) measured by the moisture meter (60) and at least one process value of the waste combustion power generation system (1); a threshold determination unit (102) that determines upper and lower thresholds of the moisture content such that the at least one process value falls within a target range based on the learning model created by the model creation unit (101); Includes.

[0113] According to the above configuration 12), the upper and lower thresholds of the moisture content that will keep at least one process value within a target range are determined using a learning model. This makes it possible to automatically optimize the operating conditions of the waste-to-energy system (1) through control of the moisture content of the waste (2).

[0114] 13) A method for treating wastewater according to at least one embodiment of the present disclosure, A waste incineration furnace (30); a waste supply unit (80) for supplying waste (2) to the waste incineration furnace (30); a wastewater pit (35) for storing wastewater separated from the waste (2) in the waste supply unit (80), measuring the moisture content of the waste (2) in the waste supply unit (80); a step (S5, S35) of spraying the wastewater stored in the wastewater pit (35) onto the waste (2) in accordance with the moisture content of the waste (2) measured in the measuring step; Equipped with.

[0115] According to the above-mentioned configuration 13), for the reasons already mentioned, a method for treating waste and wastewater is realized in which the amount of heat obtained by burning the waste (2) is stabilized with a simple configuration. [Explanation of symbols]

[0116] 1: garbage Combustion Power Generation System 10: garbage Combustion System 22: Waste heat boiler 24: Turbine 25: Generator 30: Combustion furnace 31:Drain port 35: Sewage pit 38: Inlet 60: Moisture measuring instrument 61: First moisture meter 62: Second moisture meter 70: Spraying device 80: Supply unit 82: garbage hopper 85: Garbage Pit 88: Outlet 90: Controller 101: Model Creation Department 102: Threshold determination unit 110: Feeding device

Claims

1. A waste incinerator; a waste supply unit for supplying waste to the waste incineration furnace; a wastewater pit for storing wastewater separated from the waste in the waste supply unit; a moisture meter for measuring the moisture content of the waste in the waste supply unit; A spraying device for spraying the wastewater stored in the wastewater pit onto the waste; A controller for controlling the sprinkling device in accordance with the moisture content of the waste measured by the moisture meter; Equipped with The waste supply unit includes: a waste pit configured to store the waste; A waste hopper configured to receive the waste to be supplied to the waste incineration furnace; a throwing device that is provided below the discharge outlet of the garbage pit and that throws the garbage discharged from the discharge outlet into the throwing inlet of the garbage hopper by utilizing the weight of the garbage; Including, The wastewater pit stores the wastewater in a vertical position between the discharge port and the input port, and includes a drainage port configured to drain the wastewater, The sprinkler is provided below the drain outlet and configured to sprinkle the wastewater onto the waste in the waste hopper by utilizing the weight of the wastewater. Waste combustion system.

2. A waste incineration furnace; a waste supply unit for supplying waste to the waste incineration furnace; a wastewater pit for storing wastewater separated from the waste in the waste supply unit; a moisture meter for measuring the moisture content of the waste in the waste supply unit; A spraying device for spraying the wastewater stored in the wastewater pit onto the waste; A controller for controlling the sprinkling device in accordance with the moisture content of the waste measured by the moisture meter; Equipped with The waste supply unit includes: a waste pit configured to store the waste; A waste hopper configured to receive the waste to be supplied to the waste incineration furnace; a throwing device that is provided below the discharge outlet of the garbage pit and that throws the garbage discharged from the discharge outlet into the throwing inlet of the garbage hopper by utilizing the weight of the garbage; Including, The moisture meter comprises: a first moisture meter for measuring the moisture content of the waste in the waste hopper; a second moisture meter for measuring the moisture content of the waste in the waste pit; The controller: The moisture content of the waste measured by the first moisture meter falls below a lower threshold value, The moisture content of the waste measured by the second moisture meter exceeds a specified threshold value that is equal to or greater than the lower limit threshold value, and When the amount of the wastewater stored in the wastewater pit is equal to or less than a predetermined amount, The waste hopper is configured to control the waste input device so as to input the waste stored in the waste pit into the input port of the waste hopper. Waste combustion system.

3. The controller is configured to control the sprinkling device so that the moisture content of the waste measured by the moisture meter becomes equal to or greater than the lower threshold when the moisture content of the waste measured by the moisture meter falls below a lower threshold.

3. A waste combustion system according to claim 1 or 2.

4. The controller is configured to increase a stoker speed of the waste incinerator when the moisture content of the waste measured by the moisture meter exceeds an upper threshold value.

4. The waste combustion system according to claim 3.

5. the moisture meter includes a first moisture meter for measuring the moisture content of the waste in the waste hopper; A waste incineration system according to any one of claims 1 to 4.

6. The sprinkler is configured to sprinkle the wastewater onto the waste in the waste hopper.

6. A waste combustion system according to claim 5.

7. The moisture meter includes a second moisture meter for measuring the moisture content of the waste in the waste pit.

7. A waste combustion system according to claim 6.

8. the wastewater pit is configured to collect the wastewater separated from the waste in the waste pit and the waste in the waste hopper; 7. A waste combustion system according to claim 6.

9. A waste incineration system according to any one of claims 1 to 8; A waste heat boiler using the combustion gas generated in the waste incineration furnace as a heat source; A turbine configured to rotate using steam from the waste heat boiler as a driving source; a generator configured to generate electricity by rotation of the turbine; A waste incineration power generation system equipped with:

10. The controller: a model creation unit that creates a learning model that learns the relationship between the moisture content of the waste measured by the moisture meter and at least one process value of the waste combustion power generation system; a threshold determination unit that determines upper and lower thresholds of the moisture content such that the at least one process value falls within a target range based on the learning model created by the model creation unit; Including, The waste combustion power generation system according to claim 9.

11. A waste incinerator; a waste supply unit for supplying waste to the waste incineration furnace; A method for treating wastewater in a waste incineration system comprising: a wastewater pit for storing wastewater separated from the waste in the waste supply unit, the method comprising: measuring the moisture content of the waste in the waste supply unit; A step of spraying the wastewater stored in the wastewater pit onto the waste according to the moisture content of the waste measured in the measuring step; Equipped with The waste supply unit includes: a waste pit configured to store the waste; A waste hopper configured to receive the waste to be supplied to the waste incineration furnace; a throwing device that is provided below the discharge outlet of the garbage pit and that throws the garbage discharged from the discharge outlet into the throwing inlet of the garbage hopper by utilizing the weight of the garbage; Including, The wastewater pit stores the wastewater in a vertical position between the discharge port and the input port, and includes a drainage port configured to drain the wastewater, The step of spreading includes spreading the wastewater to the waste in the waste hopper by utilizing the weight of the wastewater using a spreader provided below the drain outlet and for spreading the wastewater stored in the wastewater pit to the waste. Garbage and sewage treatment methods.

12. A waste incineration furnace; a waste supply unit for supplying waste to the waste incineration furnace; A method for treating wastewater in a waste incineration system comprising: a wastewater pit for storing wastewater separated from the waste in the waste supply unit, the method comprising: measuring the moisture content of the waste in the waste supply unit; A step of spraying the wastewater stored in the wastewater pit onto the waste according to the moisture content of the waste measured in the measuring step; A method for treating wastewater comprising: The waste supply unit includes: a waste pit configured to store the waste; A waste hopper configured to receive the waste to be supplied to the waste incineration furnace; a throwing device that is provided below the discharge outlet of the garbage pit and that throws the garbage discharged from the discharge outlet into the throwing inlet of the garbage hopper by utilizing the weight of the garbage; Including, The step of measuring the moisture content includes: a first measuring step of measuring the moisture content of the waste in the waste hopper; A second measuring step of measuring the moisture content of the waste in the waste pit, The wastewater treatment method includes: The moisture content of the waste measured in the first measuring step falls below a lower threshold value, The moisture content of the waste measured in the second measurement step exceeds a specified threshold value that is equal to or greater than the lower limit threshold value, and When the amount of the wastewater stored in the wastewater pit is equal to or less than a predetermined amount, The waste hopper further includes a step of controlling the waste input device to input the waste stored in the waste pit into the input port of the waste hopper. Garbage and sewage treatment methods.

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