JP7365293B2 - Solid fuel fired boiler, solid fuel supply amount measuring device, combustion method and program - Google Patents

Description

The present disclosure relates to a solid fuel-fired boiler, a solid fuel supply amount measuring device, a combustion method, and a program.

Patent Document 1 discloses that by arranging secondary ports for introducing secondary air into the solid fuel burner above and below or on the left and right sides of the primary port for introducing solid fuel and primary air into the solid fuel burner, the flame of the solid fuel burning burner is reduced. A technique has been disclosed for suppressing the high-temperature oxygen residual region formed on the outer periphery of the fuel cell and reducing the amount of nitrogen oxides generated.

Patent Document 2 discloses that a pulverized coal flow rate measuring means is provided in each conveying pipe for supplying pulverized coal fuel, and a combustion air supply amount commensurate with the pulverized coal supply amount to be supplied to a pulverized coal-fired boiler is calculated. A technique has been disclosed that reduces the generation of unburned substances such as carbon monoxide by reducing the excess air ratio of a fired boiler.

Patent Document 3 discloses that by arranging a radiation source part and a radiation detection part between a detection target cavity and measuring the characteristics of the detection target object, it can be used in environments containing acids, alkalis, organic solvents, etc. A technique for a radiation applied measurement device that does not cause deterioration in detection accuracy due to moisture interposed between the radiation source and the radiation source has been disclosed.

JP2013-234843A Patent No. 4855518 JP2008-002971A

In order to realize a solid fuel-fired boiler that can reduce nitrogen oxides, carbon monoxide, etc. generated from the combustion of solid fuel, the combustion of solid fuel may be adjusted by measuring the amount of solid fuel supplied. Therefore, there is a known technique for measuring the amount of solid fuel supplied by inserting an antenna or rod for measuring the amount of solid fuel supplied into a conveyance pipe that conveys fuel to a solid fuel-fired boiler. However, in order to insert the antenna or rod into the transport pipe, installation work within the transport pipe is required, such as providing a hole for inserting the antenna or rod into the transport pipe. Furthermore, an error may occur in the measured amount of solid fuel supplied due to moisture present inside the conveyance pipe.
An object of the present disclosure is to provide a solid fuel-fired boiler, a solid fuel supply amount measuring device, a combustion method, and a program that solve the above-mentioned problems.

A solid fuel-fired boiler according to the present disclosure includes a solid fuel nozzle that is connected to the tip side of each conveying pipe and installed so as to face the inside of the furnace. A burner, a combustion air supply means for individually supplying combustion air other than primary air to the solid fuel burner, and a combustion air supply means for individually measuring the supply amount of combustion air supplied by each combustion air supply means. It is equipped with an air supply measuring means, a combustion air supply amount adjusting means for adjusting the supply amount of combustion air, and a burner air ratio setting means for setting the burner air ratio. In solid fuel-fired boilers, which are injected into the furnace from a fuel nozzle and combusted under the supply of combustion air, solid fuel is produced using an absorption method that measures values that correlate to the amount of solid fuel supplied by each conveying pipe. A supply amount measuring means, a value correlated to the solid fuel supply amount measured by the solid fuel supply amount measuring means using an absorption method, and a solid fuel burner connected to the conveying pipe measured by the combustion air supply measuring means. Based on the amount of combustion air supplied to the solid fuel supply amount, the amount of combustion air supplied to the solid fuel is calculated so that the burner air ratio set by the burner air ratio setting means can be maintained. air supply amount control means for transmitting a control command signal to the air supply amount adjustment means.

The solid fuel supply amount measuring device according to the present disclosure includes a first radiation part that emits waves or radiation from the outside of the conveyance pipe in which solid fuel is conveyed to the inside of the conveyance tube, and a first radiation part that emits waves or radiation from the outside of the conveyance tube. a first detection section that detects; a second radiation section that is provided at a different position from the first radiation section and emits waves or radiation from the outside of the conveyance tube to the inside of the conveyance tube; A second detection section that detects waves or radiation from outside the conveyance pipe, and a feature amount of the waves or radiation detected from the first detection section, and a feature amount that correlates with the density of the solid fuel and its fluctuations. a first density identifying section that identifies the density of the solid fuel by comparing the first feature amount with density information in which the feature amount and the density are associated; and a feature amount of waves or radiation detected by the second detection section; a second density identification unit that identifies the density of the solid fuel by comparing a second feature amount, which is a feature amount correlated with the density of the solid fuel and its fluctuation, with density information; 2. A calculation unit that calculates the flow velocity of the solid fuel based on two feature quantities, and a calculation unit that calculates the flow velocity of the solid fuel based on the characteristic quantity, and the density specified by the first density specification unit or the density specified by the second density specification unit is multiplied by the flow velocity and the cross-sectional area of the conveyance pipe. , a measurement unit that measures the amount of solid fuel supplied.

The combustion method according to the present disclosure includes a solid fuel burner having a conveyance tube that conveys solid fuel in airflow using primary air, and a solid fuel nozzle connected to the tip side of each conveyance tube and installed so as to face the inside of the furnace. , a combustion air supply means that individually supplies combustion air other than primary air to the solid fuel burner, and a combustion air supply that individually measures the amount of combustion air supplied by each combustion air supply means. A measuring means, a combustion air supply amount adjustment means for adjusting the supply amount of combustion air, and a burner air ratio setting means for setting the burner air ratio, and the solid fuel is distributed to each conveying pipe to each solid fuel nozzle. In a solid fuel-fired boiler, which is injected into the furnace and combusted under the supply of combustion air, the absorption method is used to individually measure the value correlated to the amount of solid fuel supplied by each conveying pipe; Based on the value correlated to the solid fuel supply amount measured by the method and the supply amount of combustion air supplied to the solid fuel burner connected to the conveyance pipe, which is measured by the combustion air supply measuring means, A step of calculating a combustion air supply amount corresponding to the solid fuel supply amount and transmitting a control command signal to the combustion air supply amount adjustment means so that the burner air ratio set by the burner air ratio setting means can be maintained. has.

A program according to the present disclosure includes a solid fuel burner having a conveyance tube that conveys solid fuel in airflow using primary air, and a solid fuel nozzle connected to the tip side of each conveyance tube and installed so as to face the inside of the furnace; Combustion air supply means that individually supplies combustion air other than primary air to the solid fuel burner, and combustion air supply measurement that individually measures the amount of combustion air supplied by each combustion air supply means. means, a combustion air supply amount adjusting means for adjusting the supply amount of combustion air, and a burner air ratio setting means for setting a burner air ratio, and the solid fuel is distributed to each conveying pipe from each solid fuel nozzle. A step of using an absorption method to individually measure a value correlated to the amount of solid fuel supplied by each conveying pipe in a computer of a solid fuel-fired boiler injected into a furnace and burned under the supply of combustion air; Based on the value correlated to the solid fuel supply amount measured by the absorption method and the supply amount of combustion air supplied to the solid fuel burner connected to the conveyance pipe, which is measured by the combustion air supply measuring means. , calculates a combustion air supply amount corresponding to the solid fuel supply amount so that the burner air ratio set by the burner air ratio setting means can be maintained, and transmits a control command signal to the combustion air supply amount adjustment means. Run it as a step.

According to at least one of the above aspects, the amount of combustion air supplied can be measured by measuring the amount of solid fuel supplied using an absorption method that does not require installation work inside the conveying pipe and is less affected by moisture inside the pipe. can be adjusted.

1 is a schematic configuration diagram showing an example of a pulverized coal-fired combustion system according to an embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows an example of the vertical roller crusher based on one embodiment. FIG. 1 is a schematic plan configuration diagram of a pulverized coal-fired boiler according to an embodiment. FIG. 1 is a schematic configuration diagram of a pulverized coal burner according to an embodiment. FIG. 2 is a diagram for explaining a combustion air supply amount control system according to an embodiment. It is a figure showing an example of deviation from an average flow rate when the flow rate of pulverized coal concerning one embodiment is measured. FIG. 2 is a block diagram illustrating a configuration example of a control circuit according to an embodiment. It is a figure showing the composition of the pulverized coal flow meter concerning one embodiment. FIG. 1 is a schematic block diagram showing the configuration of a control device according to an embodiment. 3 is a graph showing a relationship between feature amounts and time according to an embodiment. 1 is a flowchart illustrating the operation of a combustion system according to one embodiment. FIG. 2 is a diagram showing the configuration of a first detection device according to an embodiment. FIG. 1 is a schematic block diagram showing the configuration of a control device according to an embodiment. FIG. 1 is a schematic block diagram showing the configuration of a computer according to at least one embodiment.

Hereinafter, specific contents related to the present disclosure will be explained with reference to figures.
(1) Configuration of pulverized coal-fired combustion system FIG. 1 is a schematic configuration diagram showing an example of a pulverized coal-fired combustion system. Pulverized coal is an example of a solid fuel. Other examples of solid fuels include biomass, solid waste, and the like.
As shown in FIG. 1, air A sent by a forced air blower 1 is branched into primary air A1 and secondary air A2, and the primary air A1 is directly crushed by a vertical roller as cold air by the primary air forced air blower 2. The air is divided into two types: one is sent to the mill 3, and the other is heated by the flue gas air preheater 4 and sent as hot air to the vertical roller crusher 3. Then, the cold air and the hot air are mixed and adjusted so that the mixed air has an appropriate temperature, and then supplied to the vertical roller crusher 3. The vertical roller crusher 3 is an example of crushing means.

After raw coal 5 is put into a coal bunker 6, it is supplied to a vertical roller crusher 3 by a coal feeder 7 and is crushed. The pulverized coal produced by being pulverized while being dried by the primary air A1 is conveyed by the primary air A1, is injected from the pulverized coal nozzle 8 into the pulverized coal-fired boiler 9, and is ignited and combusted. Pulverized coal nozzle 8 is an example of a solid fuel nozzle. Further, the pulverized coal-fired boiler 9 is an example of a solid fuel-fired boiler. The secondary air A2 is heated by the steam air preheater 10 and the flue gas air preheater 4, and is sent to the wind box 11 and the after air port (AAP) 65, and is used for combustion in the pulverized coal-fired boiler 9. It will be done.

Dust is removed from the combustion exhaust gas generated by the combustion of pulverized coal in a dust collector 12, nitrogen oxides are reduced in a denitrification device 13, nitrogen oxides are reduced in a denitrification device 13, the flue gas is sucked in by an induced blower 14 through a combustion exhaust gas type air preheater 4, and then in a desulfurization device 15. The system is such that sulfur is removed and released into the atmosphere from a chimney 16.

In this example, the dust collector 12, the denitrification device 13, and the flue gas air preheater 4 are arranged in this order from the upstream side in the flow direction of the flue gas, but for example, the denitrification device 13, the flue gas air preheater 4, and the dust collector 12 are arranged in this order. Sometimes it is placed.

(2) Configuration of vertical roller crusher 3 FIG. 2 is a schematic configuration diagram showing an example of the vertical roller crusher 3.

As shown in the figure, the vertical roller crusher 3 mainly includes a crushing section 21, a classifying section 22, a crushing section driving section 23, a classifying section driving section 24, and a distribution section 25.

The crushing section 21 includes a housing 26, a crushing table 27, a plurality of crushing rollers 28 rolling on the crushing table 27, a throat 29 which is a primary air inlet provided on the outer periphery of the crushing table 27, and the like. There is.

The classification section 22 includes a housing 26, a cyclone type fixed classifier 30 disposed inside the housing 26, and a rotary classifier 31 disposed inside the fixed classifier 30. The fixed classifier 30 has a fixed fin 32 and a recovery cone 33 connected to the lower end of the fixed fin 32. The rotary classifier 31 has a rotating shaft 34 and rotating blades 35 supported by the rotating shaft 34.

The crusher drive unit 23 includes a crusher motor 36 that rotationally drives the crusher table 27, a base 37 on which the crusher table 27 is rotatably mounted, a pressure frame 38 that supports the crusher roller 28, a bracket 39, a rod 40, and a crusher. It is comprised of a pressure cylinder 41 for adjusting the pressure force of the crushing roller 28 against the table 27, and the like.

The classifier drive unit 24 has a classifier motor 42, and the output of the classifier motor 42 is transmitted to the rotating shaft 34 of the classifier 22 via gears. The distribution section 25 is provided at the upper part of the vertical roller crusher 3 and has one distribution chamber 47, and a plurality of coal feed pipes 43 are connected to the one distribution chamber 47. The coal conveying pipe 43 is an example of a conveying pipe. In this embodiment, about four to six coal feeding pipes 43 are connected, but only one coal feeding pipe 43 is depicted in FIG. 2 for the sake of simplification of the drawing.

The raw coal 5 supplied from the coal feed pipe 44 falls into the center of the rotating pulverizing table 27, moves toward the outer circumference by the centrifugal force generated as the pulverizing table 27 rotates, and is pulverized with the pulverizing table 27. It is caught between the rollers 28 and crushed.

The crushed coal grains further move to the outer periphery, merge with primary air 45 heated to 150°C to 300°C, which is introduced into the crushing chamber through the throat 29 provided on the outer periphery of the crushing table 27, and are dried. It is blown upwards. The blown up particles undergo primary classification by weight, and coarse coal particles fall and are returned to the crushing section 21.

The fine coal particles that have reached the classification section 22 are classified by a fixed classifier 30 and a rotary classifier 31 into pulverized coal with a predetermined particle size or less and coarse powder coal with a predetermined particle size (secondary classification), and the coarse pulverized coal is recovered. It falls along the inner wall of the cone 33 and is re-pulverized. On the other hand, a mixed fluid 46 of pulverized coal of a predetermined particle size or less and primary air is sent to a distribution chamber 47, where it is distributed to a plurality of coal feeding pipes 43, respectively, and is conveyed to each pulverized coal nozzle 8 through each coal feeding pipe 43. be done.

Note that there is also a configuration in which a small number (for example, about 1 to 4) of coal feed pipes are connected to the crusher, and each coal feed pipe branches in the middle and is connected to two or more burners. The phrase "a plurality of conveying pipes are connected to one crushing means to carry out air flow conveyance" described in claim 9 of the present specification also includes such a form.
A pulverized coal flowmeter 51 is attached in the middle of each coal feeding pipe 43. The pulverized coal flowmeter 51 is an example of a solid fuel supply amount measuring device or a solid fuel supply amount measuring means. The pulverized coal flowmeter 51 includes a first detection device 101, a second detection device 102, and a control device 200, which are shown in a simplified manner in FIG. The detailed configuration of the pulverized coal flow meter 51 is shown in FIG. 8 and will be described later. The flow rate of pulverized coal is an example of a value correlated to the flow rate of pulverized coal.

FIG. 3 is a schematic plan configuration diagram of the pulverized coal-fired boiler according to the first embodiment.
In the case of this embodiment, for example, four pulverized coal burners 61a to 61d are installed in front of the can of the pulverized coal-fired boiler 9, and four pulverized coal burners 61e to 61h are installed behind the can so as to face them. . Pulverized coal burner 61 is an example of a fixed fuel burner. The crusher 3 is equipped with two units, one for can front and one for can rear, and four coal feeding pipes 43a to 43d extending from the can front crusher 3a are connected to pulverized coal burners 61a to 61d, respectively. Four coal feed pipes 43e to 43h extending from the post crusher 3b are connected to pulverized coal burners 61e to 61h, respectively.

Pulverized coal flow meters 51a to 51h are attached to each of the coal feeding pipes 43a to 43h, so that the flow rate of pulverized coal passing through the coal feeding pipe 43 can be measured individually.

FIG. 4 is a schematic diagram of the pulverized coal burner 61. As shown in the figure, a pulverized coal nozzle 8 is installed in the center of the pulverized coal burner 61, and combustion air other than primary air (secondary air, tertiary air, ) 62 is provided individually for each burner 61. Further, in the middle of the combustion air supply path 63, a combustion air supply amount adjusting means 64 (see FIG. 5), for example, of a damper type or a slide type, is provided to adjust the supply amount of the combustion air 62. As shown in the figure, a mixed fluid 46 of pulverized coal and primary air is injected into the furnace from the pulverized coal nozzle 8, and combustion air 62 with a low excess air ratio is supplied to the combustion air supply path 63. The pulverized coal is ignited and combusted by being supplied from the pulverized coal.

In this embodiment, the combustion air 62 is supplied to the outer periphery of the pulverized coal nozzle 8, but the present invention is not limited thereto. It is sufficient if the combustion air 62 is supplied as shown in FIG.

In FIG. 6, X (t/h) of raw coal is supplied to one pulverizer 3 for pulverization, and the resulting pulverized coal is distributed to four coal feeding pipes 43a to 43d. FIG. 4 is a diagram showing an example of the deviation from the average flow rate when the flow rate of pulverized coal is measured by each of the pulverized coal flowmeters 51a to 51d.

In this figure, a deviation value of 0% indicates that pulverized coal with an average flow rate (X/4 in this example) was detected. This example shows that pulverized coal smaller than the average flow rate was transported to the coal feeding pipes 43a and 43b, and pulverized coal larger than the average flow rate was transported to the coal feeding pipes 43c and 43d. Deviations in this measured value appear due to, for example, differences in pressure loss due to differences in the length of the coal feed pipes 43 or the structure of the crusher, and the deviations also vary depending on the operating conditions of the crusher, such as the rotation speed of the rotary classifier. It has been confirmed that

In this embodiment, the deviation state of the flow rate of pulverized coal conveyed by each coal feeding pipe 43 is detected, and based on the deviation, the pulverized coal is adjusted so that the air ratio set by the burner air ratio setting means can be maintained. The amount of combustion air supplied to each burner 61 is individually calculated by calculating the amount of combustion air supplied corresponding to the amount of supply for each burner and transmitting a control signal to each combustion air supply amount adjusting means 64. It is to be adjusted to.

FIG. 5 is a diagram for explaining the combustion air supply amount control system. The figure on the right side of the figure is a diagram showing an example of the arrangement of the pulverized coal burner 61 in the pulverized coal-fired boiler 9 and the AAP 65 on the downstream side thereof. Both the can front and can rear sections are divided into a plurality of burner stages, and a large number of pulverized coal burners 61 are installed side by side in each burner stage. Further, the AAPs 65 are also arranged horizontally in front of the can and at the rear of the can, corresponding to each pulverized coal burner 61.

The diagram on the left side of the figure is a diagram showing a control system for the amount of combustion air supplied to the pulverized coal burner 61. As described above, the flow rate of pulverized coal distributed and supplied from the pulverizer 3 to each burner 61a, 61b is individually measured by the pulverized coal flowmeters 51a, 51b, and the measured values are input to the control circuit 66.

On the other hand, combustion air supply amount adjusting means 64a, 64b and air flow meters 67a, 67b are individually attached in the middle of combustion air supply paths 63a, 63b provided corresponding to each burner 61a, 61b. ing. Measured values of the amount of air supplied to each burner 61a, 61b, which are individually measured by the air flowmeters 67a, 67b, are also input to the control circuit 66. The control circuit 66 outputs combustion air supply amount control signals 68a and 68b to the combustion air supply amount adjusting means 64a and 64b individually.

FIG. 7 is a block diagram showing an example of the configuration of the control circuit 66. As shown in FIG. Measured values from the pulverized coal flowmeters 51a and 51b are input to the control circuit 66, and an adder 69 and a divider 70 calculate deviation values from the average flow rate in each coal feed pipe 43a and 43b.

The control circuit 66 is previously inputted with a coal feed amount 71, a burner air ratio 72, a theoretical air amount 73, combustion air amounts 74a and 74b for each burner, and the like. In this embodiment, the burner air ratio 72 is set to 0.8, and the air ratio in AAP is set to 0.3, so the air ratio of the entire boiler is a low excess air ratio of 1.1.

Based on these various setting values and the deviation value of the pulverized coal flow rate in each of the coal feed pipes 43a and 43b, the amount of combustion air to be supplied corresponding to the amount of pulverized coal supplied is adjusted so that the above-mentioned burner air ratio can be maintained. The amount control command values 68a and 68b are calculated and output. Various multipliers 76, subtracters 77, etc. in the control circuit 66 are used as means for calculating command values 68a and 68b. The restriction items of the correction amount limiters 75a and 75b provided on the output end side of the control circuit 66 are the upper and lower limits of the absolute value, the width of change, and the rate of change.

As described above, by individually controlling the amount of combustion air supplied in accordance with the amount of pulverized coal supplied in each coal feed pipe, the effect of reducing carbon monoxide is large even in combustion at a low excess air ratio.

(3) Configuration of pulverized coal flowmeter 51 and its measurement principle FIG. 8 is a diagram showing the configuration of pulverized coal flowmeter 51.
The pulverized coal flowmeter 51 includes a first detection device 101, a second detection device 102, and a control device 200. The first detection device 101 and the control device 200 are connected by wire or wirelessly. Further, the second detection device 102 and the control device 200 are connected by wire or wirelessly.

As shown in FIG. 8, the first detection device 101 and the second detection device 102 have similar configurations.
The first detection device 101 and the second detection device 102 are devices that detect waves or radiation emitted from the outside of the coal pipe 43.
The second detection device 102 is provided at a different position from the first detection device. The different position is a position upstream or downstream of the first detection device 101 in the transport pipe. Further, the first detection device 101 and the second detection device 102 are provided in the straight pipe portion of the coal feed pipe 43. That is, the bent portion of the coal feed pipe 43 is not included between the first detection device 101 and the second detection device 102. An example of a straight pipe section in which the first detection device 101 and the second detection device 102 are provided is a straight pipe section having a length equal to or longer than the value obtained by multiplying the diameter of the coal feed pipe 43 by 10. However, if the angle of radiation and detection of waves or radiation to the coal pipe 43 is selected in advance at an angle at which average information can be obtained in consideration of the influence of drift in the coal pipe 43, the first detection The device 101 and the second detection device 102 do not need to be provided in the straight pipe section.

The first detection device 101 includes a gamma ray source 103A, a heat shield plate 104A, a detector 105A, and a first shutter 106A. Further, the second detection device 102 includes a gamma ray source 103B, a heat shield plate 104B, a detector 105B, and a second shutter 106B. The gamma ray source 103A is an example of the first radiation section. Detector 105A is an example of a first detection section. The gamma ray source 103B is an example of the second radiation section. Detector 105B is an example of a second detection section.

Gamma ray source 103A and gamma ray source 103B radiate gamma rays from the outside of coal feeding pipe 43 to the inside of coal feeding pipe 43. Gamma rays are an example of waves or radiation. The pulverized coal flowmeter 51 may emit particle beams such as ultrasonic waves, x-rays, and neutron beams instead of gamma rays, and may detect particle beams such as ultrasonic waves, x-rays, and neutron beams.

The heat shield plate 104A and the heat shield plate 104B are plates that absorb heat generated from the detector 105A and the detector 105B and prevent heat conduction from the detector 105A and the detector 105B to the coal pipe 43.

Detector 105A and detector 105B are devices that detect gamma rays emitted from gamma ray source 103A and gamma ray source 103B from outside of coal pipe 43. The detector 105A and the detector 105B are equipped with a scintillator (not shown). A scintillator detects gamma rays by emitting fluorescence upon receiving the gamma rays. The detector 105A and the detector 105B do not need to use a scintillator, but may include a detector using an ionization chamber, a detector using a GM (Geiger-Muller) counter, and a He (tritium) proportional counter. The detector may be any one of a detector, a semiconductor detector, a detector using a CCD (Charged Coupled Device), and a detector using a photomultiplier tube (PMT).
Detector 105A and detector 105B are arranged at positions facing gamma ray source 103A and gamma ray source 103B, as shown in FIG.

When the intensity of gamma rays emitted by the gamma ray sources 103A and 103B is 4 MBq, the distance between the detectors 105A and 105B is about 10 m. In this case, the cumulative time during which the gamma ray sources 103A and 103B emit radiation is 600 milliseconds or more. On the other hand, when the intensity of gamma rays emitted by the gamma ray sources 103A and 103B is several TBq, and the distance between the detectors 105A and 105B is about several meters, the integration time is about several milliseconds.

Gamma rays emitted by the gamma ray source 103A and the gamma ray source 103B are absorbed by the pulverized coal mixture transported in the B direction inside the coal feeding pipe 43, scattered by the pulverized coal mixture, and reflected by the pulverized coal mixture. . The pulverized coal mixture here refers to an airflow in which pulverized coal and air are mixed. Therefore, the intensity of the gamma rays detected by the detector 105A and the detector 105B is lower than the intensity of the gamma rays emitted by the gamma ray source 103A and the gamma ray source 103B.
The higher the density of the pulverized coal in the coal feeding pipe 43, the greater the amount of gamma rays absorbed, scattered, and reflected by the pulverized coal mixture. That is, the higher the density of pulverized coal, the lower the intensity of gamma rays detected by detector 105A and detector 105B.

The first shutter 106A and the second shutter 106B receive a signal from the control device 200, move in front of the gamma ray source 103A or the gamma ray source 103B, and block the gamma rays emitted by the gamma ray source 103A or the gamma ray source 103B.

《Configuration of control device》
The configuration of the control device 200 will be described below.
The control device 200 is a device that receives gamma ray intensity or a signal correlated to the gamma ray intensity from the first detection device 101 and the second detection device 102 and calculates the flow rate of pulverized coal. The flow rate of pulverized coal is an example of the amount of solid fuel supplied.

FIG. 9 is a schematic block diagram showing the configuration of the control device 200.
The control device 200 includes a first density specifying section 201, a second density specifying section 202, a calculating section 203, a measuring section 204, and a storage section 205.

The first density identifying unit 201 identifies the density of pulverized coal by comparing the first feature amount indicated by the signal received from the detector 105A with density information. The first feature amount is a feature amount detected by the detector 105A, and is a feature amount that correlates with the density of pulverized coal and its fluctuation. In this embodiment, the first feature is the intensity of gamma rays. Density information is information in which feature amounts and densities are associated.

The second density identifying unit 202 identifies the density of pulverized coal by comparing the second feature amount indicated by the signal received from the detector 105B with the density information. The second feature amount is a feature amount detected by the detector 105B, and is a feature amount that correlates with the density of pulverized coal and its fluctuation.

The density information is recorded in advance in the storage unit 205 by the user. An example of a method for specifying density information will be described below.
A calibration sheet with a known density is inserted between the gamma ray source 103 and the detector 105. Examples of the material of the calibration sheet include resin. For example, in the case of a pulverized coal mixture with a density of about 550 kg/cm ³ , the calibration sheet is preferably made of polypropylene with a density of 910 kg/cm ³ and a thickness of 0.5 mm to 2 mm. In this way, the detected first feature amount or second feature amount is associated with the known density. Further, the first feature amount or the second feature amount detected when the flow rate of pulverized coal is 0 is associated with a value of 0. This allows the user to specify density information. Density information may be specified by preparing a plurality of calibration sheets with different thicknesses. Alternatively, the amount of attenuation of gamma rays due to the wall surface of the coal pipe 43 may be measured and reflected in the density information.

The calculation unit 203 calculates the flow velocity of pulverized coal based on the first feature amount, the second feature amount, the time when the first shutter 106A blocks gamma rays, and the time when the second shutter 106B blocks gamma rays. The specific operation of the calculation unit 203 will be explained below.

FIG. 10 is a graph showing the relationship between the first feature amount, the second feature amount, and time.
As shown in FIG. 10, since the density of the transported pulverized coal changes with time, the first feature amount and the second feature amount change with time. Since the pulverized coal is transported in the B direction in the coal conveying pipe 43, the first feature amount and the second feature amount have the same or similar waveforms. For example, the first feature amount exhibits a high waveform at time T1. The second feature shows a high waveform at time T2. As a result, the pulverized coal in the coal feeding pipe 43 is detected by subtracting time T1 from time T2 between the first detection device 101 that detected the first feature amount and the second detection device 102 that detected the second feature amount. It can be seen that it was transported in time. Therefore, the calculation unit 203 can calculate the flow velocity of pulverized coal by dividing the distance between the first detection device 101 and the second detection device 102 by the time difference between time T2 and time T1.
The reference time T0 is set by the control device 200 moving the first shutter 106A and the second shutter 106B simultaneously. That is, by simultaneously releasing the gamma ray shielding by the first shutter 106A and the second shutter 106B, the first detection device 101 and the second detection device 102 detect the first feature amount and the second feature amount at the same time. It can be detected from a certain reference time T0.

The measurement unit 204 multiplies the density of the pulverized coal by the flow velocity calculated by the calculation unit 203 and the cross-sectional area of the coal feeding pipe 43 to calculate a value correlated to the flow rate of the pulverized coal.
The pulverized coal combustion system may be equipped with a display device to display the flow rate of pulverized coal calculated by the measurement unit 204 in real time. An example of a display device is a display device.

Storage unit 205 stores density information. An example of the storage unit 205 is a hard disk.

《Operation of pulverized coal combustion system》
Hereinafter, among the operations of the pulverized coal combustion system, the operation of the pulverized coal flowmeter 51 will be described.
FIG. 11 is a flowchart showing the operation of the pulverized coal flow meter 51 among the operations of the pulverized coal combustion system.

Gamma ray source 103A and gamma ray source 103B radiate gamma rays into the inside of coal pipe 43 (Step S1).
The detector 105A and the detector 105B detect gamma rays emitted from the gamma ray source 103A and the gamma ray source 103B (step S2).

The first density identifying unit 201 identifies the density by comparing the first feature indicated by the signal received from the detector 105A with the density information (step S3).
The second density identifying unit 202 identifies the density by comparing the first feature indicated by the signal received from the detector 105B with the density information (step S4).

The calculation unit 203 calculates the flow velocity of pulverized coal based on the first feature amount, the second feature amount, the first shutter 106A, and the second shutter 106B (step S5).
The measuring unit 204 calculates the flow rate of pulverized coal by multiplying the density specified by the first density specifying unit 201 or the density specified by the second density specifying unit 202 by the flow velocity calculated by the calculating unit 203 and the cross-sectional area of the conveying pipe. (Step S6).

《Action/Effect》
The solid fuel-fired boiler according to the present disclosure includes a conveyance pipe that airflow conveys solid fuel by primary air A1, and a solid fuel nozzle connected to the tip side of each conveyance pipe and installed so as to face the inside of the furnace 78. A solid fuel burner, a combustion air supply means for individually supplying combustion air other than primary air A1 to the solid fuel burner, and individually measuring the supply amount of combustion air supplied by each combustion air supply means. A combustion air supply measuring means for adjusting the supply amount of combustion air, a combustion air supply amount adjusting means for adjusting the supply amount of combustion air, and a burner air ratio setting means for setting the burner air ratio, and the solid fuel is distributed to each conveying pipe. In a solid fuel-fired boiler in which the solid fuel is injected into the furnace 78 from each solid fuel nozzle and combusted under the supply of combustion air, an absorption method in which a value correlated to the amount of solid fuel supplied by each conveying pipe is individually measured. A value correlated to the solid fuel supply amount measured by the solid fuel supply amount measurement means based on the absorption method, and a value correlated to the solid fuel supply amount measured by the solid fuel supply amount measurement means based on the absorption method, and the value connected to the conveyance pipe measured by the combustion air supply measurement means. Based on the amount of combustion air supplied to the solid fuel burner, calculate the amount of combustion air supplied that matches the amount of solid fuel supplied so that the burner air ratio set by the burner air ratio setting means can be maintained. and an air supply amount control means for transmitting a control command signal to the combustion air supply amount adjustment means.

Solid fuel-fired boilers do not require any installation work inside the conveyor pipes, and use an absorption method that is less susceptible to the effects of moisture inside the conveyor pipes.By measuring values that correlate with the solid fuel supply amount, the amount of combustion air supplied can be determined. Can be adjusted.

Further, the solid fuel supply amount measuring means using the absorption method of a solid fuel fired boiler measures the solid fuel supply amount as a value correlated to the solid fuel supply amount.

Solid fuel-fired boilers do not require installation work inside the conveyor pipe, and can adjust the supply of combustion air by measuring the solid fuel supply using an absorption method that is less affected by moisture inside the conveyor pipe. can.

Moreover, the solid fuel supply amount measuring means of the solid fuel-fired boiler includes a first radiation part that emits waves or radiation from the outside of the transport pipe to the inside of the transport pipe, and a first radiation part that detects the waves or radiation from the outside of the transport pipe. a second radiation part that is provided at a different position from the first radiation part and emits waves or radiation from the outside of the transport pipe to the inside of the transport pipe; and a wave or radiation emitted from the second radiation part. a second detection section that detects radiation from outside the transport pipe; and a first feature that is a feature amount of the wave or radiation detected from the first detection section and is a feature amount that correlates with the density of the solid fuel and its fluctuations. A first density identifying unit 201 identifies the density of the solid fuel by comparing the quantity with density information in which the feature quantity and the density are associated, and a characteristic quantity of waves or radiation detected by a second detection unit. , a second density identification unit 202 that identifies the density of the solid fuel by comparing a second feature amount, which is a feature amount correlated with the density of the solid fuel and its fluctuation, with density information; A calculation unit 203 that calculates the flow velocity of the solid fuel based on the feature quantity, and the density specified by the first density identification unit or the density identified by the second density identification unit are multiplied by the flow velocity and the cross-sectional area of the conveying pipe. , a measurement unit 204 that measures the amount of solid fuel supplied.

Solid fuel-fired boilers measure the amount of solid fuel supplied by an absorption method that detects waves or radiation emitted from the outside of the conveyor pipe. As a result, the solid fuel-fired boiler does not require any installation work inside the conveyor pipe, and can adjust the amount of combustion air supplied using an absorption method that is less affected by moisture inside the conveyor pipe.

Moreover, the solid fuel-fired boiler is movable between the first radiating part and the conveying pipe, and the first shutter shields waves or radiation emitted from the first radiating part between the first radiating part and the conveying pipe. 106A, and a second shutter 106B that can be moved between the second radiating section and the conveying tube and shielding waves or radiation emitted from the second radiating section between the second radiating section and the conveying tube, The unit 203 calculates the flow velocity of the solid fuel based on the time when the first shutter 106A blocks waves or radiation, the time when the second shutter 106B blocks waves or radiation, the first feature amount, and the second feature amount. calculate.

The solid fuel-fired boiler measures the amount of solid fuel supplied using the flow rate calculated based on the time when the first shutter 106A and the second shutter 106B shield waves or radiation. As a result, the solid fuel-fired boiler does not require any installation work inside the conveyor pipe, and can adjust the amount of combustion air supplied using an absorption method that is less affected by moisture inside the conveyor pipe.

Further, the solid fuel of the solid fuel-fired boiler is pulverized coal, and it is equipped with a pulverizing means for pulverizing the supplied coal to produce pulverized coal, and a plurality of conveying pipes are connected to one pulverizing means, The pulverized coal is air-flow conveyed by the primary air A1, and the solid fuel-fired boiler distributes the pulverized coal generated by crushing with the crushing means to each conveying pipe and injects it into the furnace 78 from each solid fuel nozzle. Burns under the supply of combustion air.

Solid fuel-fired boilers do not require any installation work inside the conveyor pipes, and use an absorption method that is less affected by moisture inside the conveyor pipes to measure values that correlate with the amount of pulverized coal supplied, thereby reducing the amount of combustion air supplied. Can be adjusted.

The solid fuel supply amount measuring device according to the present disclosure includes a first radiation part that emits waves or radiation from the outside of the transport pipe to the inside of the transport pipe, and a first detection part that detects the waves or radiation from the outside of the transport pipe. a second radiation part that is provided at a different position from the first radiation part and emits waves or radiation from the outside of the transport pipe to the inside of the transport pipe; A second detection unit that detects from the outside of the conveyance pipe, and a first feature quantity that is a feature quantity of waves or radiation detected from the first detection unit and that is a feature quantity that correlates with the density of the solid fuel and its fluctuation, The feature amount of the wave or radiation detected by the first density identification unit 201 that identifies the density of the solid fuel by comparing the feature amount and the density with the density information associated with the density information, and the second detection unit, which identifies the density of the solid fuel. A second density identification unit 202 identifies the density of the solid fuel by comparing a second feature amount, which is a feature amount correlated with the density and its fluctuation, with density information; a calculation unit 203 that calculates the flow velocity of the solid fuel based on the flow velocity of the solid fuel; It includes a measurement unit 204 that measures the supply amount.

The solid fuel supply amount measuring device measures the solid fuel supply amount by an absorption method that detects waves or radiation emitted from the outside of the conveying pipe. Thereby, the solid fuel supply amount measuring device can measure the supply amount of solid fuel using an absorption method that does not require installation work inside the conveyance pipe and is not easily affected by moisture inside the conveyance pipe.

The combustion method according to the present disclosure includes a solid fuel having a conveying pipe that airflow conveys the solid fuel by primary air A1, and a solid fuel nozzle connected to the tip side of each conveying pipe and installed so as to face the inside of the furnace 78. A burner, a combustion air supply means for individually supplying combustion air other than the primary air A1 to the solid fuel burner, and a combustion system that individually measures the amount of combustion air supplied by each combustion air supply means. a combustion air supply measurement means, a combustion air supply amount adjustment means for adjusting the supply amount of combustion air, and a burner air ratio setting means for setting the burner air ratio. In a solid fuel-fired boiler in which solid fuel is injected into the furnace 78 from a solid fuel nozzle and combusted under the supply of combustion air, an absorption method is used in which a value correlated to the amount of solid fuel supplied by each conveying pipe is individually measured. step, a value correlated to the solid fuel supply amount measured by the absorption method, and the supply amount of combustion air supplied to the solid fuel burner connected to the conveyance pipe as measured by the combustion air supply measuring means. Based on this, a combustion air supply amount corresponding to the solid fuel supply amount is calculated so that the burner air ratio set by the burner air ratio setting means can be maintained, and a control command signal is sent to the combustion air supply amount adjustment means. the step of transmitting.

Users of the combustion method can calculate values that correlate to the amount of solid fuel supplied in solid fuel-fired boilers by using an absorption method that does not require installation work inside the conveyor pipe and is less affected by moisture inside the conveyor pipe. By measuring, the amount of combustion air supplied can be adjusted.

The program according to the present disclosure is directed to a solid fuel burner that has transport pipes that airflow transport solid fuel using primary air A1, and solid fuel nozzles that are connected to the tip side of each transport pipe and are installed so as to face the inside of the furnace 78. , a combustion air supply means for individually supplying combustion air other than the primary air A1 to the solid fuel burner, and a combustion air supply means for individually measuring the supply amount of combustion air supplied by each combustion air supply means. It is equipped with an air supply measuring means, a combustion air supply amount adjusting means for adjusting the supply amount of combustion air, and a burner air ratio setting means for setting the burner air ratio. An absorption method in which the computer of a solid fuel-fired boiler injects fuel from a fuel nozzle into the furnace 78 and burns under the supply of combustion air, and individually measures values correlated to the amount of solid fuel supplied by each conveying pipe. a value correlated to the amount of solid fuel supplied measured by the absorption method, and the supply of combustion air supplied to the solid fuel burner connected to the conveying pipe, measured by the combustion air supply measuring means. Based on the amount, the combustion air supply amount corresponding to the solid fuel supply amount is calculated and a control command is given to the combustion air supply amount adjustment means so that the burner air ratio set by the burner air ratio setting means can be maintained. Execute it as a step to send a signal.

When the program user runs the program, the computer of the solid fuel-fired boiler can be set to a value that correlates to the amount of solid fuel supplied using an absorption method that does not require installation work inside the conveyor pipe and is less affected by moisture inside the conveyor pipe. By measuring this, the amount of combustion air supplied can be adjusted.

<Second embodiment>
A pulverized coal-fired combustion system according to a second embodiment will be described below.
The configuration of the pulverized coal combustion system according to the second embodiment does not include the first shutter 106A and the second shutter 106B, but includes a clock (not shown).
Further, the first detection device 101 and the second detection device 102 according to the second embodiment emit waves or radiation from a plurality of different positions in the circumferential direction of the coal pipe 43, and emit waves or radiation from a plurality of different positions in the circumferential direction of the coal pipe 43. Detect waves or radiation from multiple different locations.

The clock is a device that transmits a signal indicating time to the first detection device 101 and the second detection device 102.
The first detection device 101 and the second detection device 102 are connected to the clock by wire or wirelessly. The first detection device 101 and the second detection device 102 set a reference time T0 based on the signal transmitted from the clock.
Instead of a clock, the pulverized coal combustion system may connect to a network environment, accept a signal indicating standard time, and set reference time T0.

FIG. 12 is a diagram showing the configuration of the first detection device 101 according to the second embodiment.
As shown in FIG. 12, two first detection devices 101 are provided. Here, the line segment connecting the gamma ray source 103A and the detector 105A and the line segment connecting the gamma ray source 103C and the detector 105C are orthogonal. Although not shown, two second detection devices 102 are provided in the same manner as the first detection device 101.

The first density specifying unit 201 compares the characteristic amounts of waves or radiation detected by the two first detection devices 101 with density information, calculates the specified value, and specifies the density of the solid fuel. For example, the first density specifying unit 201 specifies the density of the solid fuel by computing two values related to multiple directions specified by comparing with the density information using a CT (Computed Tomography) method. In addition, the second density identification unit 202 compares the characteristic amounts of waves or radiation detected by the two second detection devices 102 with the density information, calculates the identified value, and identifies the density of the solid fuel. .

The first density identification unit 201 identifies the density based on the feature amounts detected by the plurality of first detection devices 101, and therefore identifies the density with higher accuracy than when the density is determined based on a single feature amount. can do.

The pulverized coal-fired combustion system may not include a plurality of first detection devices 101, but may include one first detection device 101 that can move in the circumferential direction of the conveying pipe. In this case, the gamma ray source 103A of the first detection device 101 emits a plurality of waves or radiation while moving in the circumferential direction. Further, the first detection device 101 and the detector 105A detect a plurality of waves or radiation while moving in the circumferential direction. Further, the pulverized coal-fired combustion system includes one movable second detection device 102, similar to the first detection device 101.
In this case, the first density specifying unit 201 specifies the density of the solid fuel by calculating the plurality of values in multiple directions specified by comparing the density information with the CT method.
With this configuration, the pulverized coal combustion system can identify the density based on a plurality of characteristic quantities of waves or radiation without having to include a plurality of first detection devices 101 and a plurality of second detection devices 102. be able to.

《Action/Effect》
The first radiation part of the solid fuel-fired boiler according to the present disclosure emits waves or radiation from a plurality of different positions in the circumferential direction of the coal conveyance pipe 43, and the first detection part emits waves or radiation from a plurality of different positions in the circumferential direction of the conveyance pipe 43. Detecting waves or radiation from the position, the first density specifying unit 201 compares the feature quantities of the plurality of waves or radiation detected from the first detection unit with the density information and calculates a plurality of specified values, Determine the density of solid fuel.

Since the first density specifying unit 201 specifies the density based on a plurality of feature amounts, it is possible to specify the density with higher accuracy than when specifying the density based on a single feature amount. A solid fuel-fired boiler can measure the amount of solid fuel supplied based on the density specified with high accuracy, and can adjust the amount of combustion air supplied.

Moreover, the first radiation part of the solid fuel fired boiler can be moved in the circumferential direction, and the first detection part can be moved in the circumferential direction.

The first density specifying unit 201 specifies the density based on a plurality of feature amounts detected by the movement of the first detection device 101, so the accuracy is lower than when specifying the density based on a single feature amount. High densities can be identified. A solid fuel-fired boiler can measure the amount of solid fuel supplied based on the density specified with high accuracy, and can adjust the amount of combustion air supplied.

Further, the solid fuel supply amount measuring means for the solid fuel fired boiler includes a plurality of pairs of the first radiating part and the first detecting part, and a line segment connecting at least the pair of the first radiating part and the first detecting part is different from the other one. It intersects the line segment connecting the pair of the first radiation section and the first detection section.

The first density specifying unit 201 specifies the density based on a plurality of feature amounts detected by the plurality of first detection devices 101, so the density is more accurate than when specifying the density based on a single feature amount. can be identified. A solid fuel-fired boiler can measure the amount of solid fuel supplied based on the density specified with high accuracy, and can adjust the amount of combustion air supplied.

<Third embodiment>
A pulverized coal-fired combustion system according to a third embodiment will be described below.
The configuration of the control device 200 according to the third embodiment includes a learning section 206 in addition to the configuration of the control device 200 according to the first embodiment.

The learning unit 206 uses the flow rate of pulverized coal and the supply amount of combustion air of each of the plurality of conveying pipes as explanatory variables, and calculates the oxygen concentration in the furnace 78, nitrogen oxides generated by combustion of pulverized coal, and the amount of nitrogen oxide generated by combustion of pulverized coal. A trained model is generated by learning, using at least one of the amount of generated carbon monoxide and the amount of unburned pulverized coal as an explanatory variable, and using the burner air ratio or the combustion air supply amount as an objective variable. Further, the learning unit 206 records the generated trained model in the storage unit 205. Storage unit 205 is an example of storage means.

The pulverized coal-fired combustion system controls the amount of combustion air supplied to each burner 61 by transmitting a control signal to the combustion air supply amount adjusting means 64 based on the learned model stored in the storage unit 205. Adjust individually.

The learning unit 206 may generate a trained model related to machine learning by updating an existing trained model based on the explanatory variables and objective variables acquired in real time.

《Action/Effect》
The solid fuel-fired boiler according to the present disclosure uses a value correlated with the amount of solid fuel supplied and the amount of combustion air supplied as explanatory variables, and uses the oxygen concentration in the furnace 78, nitrogen oxides generated by combustion of solid fuel, and the amount of solid fuel. A trained model generated by learning with at least one of carbon monoxide generated by combustion and the amount of unburned solid fuel as an explanatory variable and the burner air ratio or combustion air supply amount as an objective variable. The air supply amount control means transmits a control command signal to the combustion air supply amount adjustment means based on the learned model.

The solid fuel-fired boiler adjusts the combustion air by transmitting a control command signal to the combustion air supply amount adjusting means based on a learned model generated based on a plurality of explanatory variables. Thereby, the supply amount of combustion air can be adjusted based on the objective variable specified with high accuracy.

<Computer configuration>
FIG. 14 is a schematic block diagram showing the configuration of a computer according to at least one embodiment.
Computer 1100 includes a processor 1110, main memory 1120, storage 1130, and interface 1140.
The control device 200 described above is implemented in the computer 1100. The operations of each processing unit described above are stored in the storage 1130 in the form of a program. Processor 1110 reads the program from storage 1130, expands it to main memory 1120, and executes the above processing according to the program. Further, the processor 1110 reserves storage areas corresponding to each of the above-mentioned storage units in the main memory 1120 according to the program.

The program may be for implementing part of the functions that the computer 1100 performs. For example, the program may function in combination with other programs already stored in the storage 1130 or in combination with other programs installed in other devices. Note that in other embodiments, the computer 1100 may include a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device) in addition to or in place of the above configuration. Examples of PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Program Mable Gate Array). In this case, part or all of the functions implemented by processor 1110 may be implemented by the integrated circuit.

Examples of the storage 1130 include a magnetic disk, a magneto-optical disk, a semiconductor memory, and the like. Storage 1130 may be internal media connected directly to the bus of computer 1100, or external media connected to the computer via an interface 1140 or communication line. Further, when this program is distributed to the computer 1100 via a communication line, the computer 1100 that received the distribution may develop the program in the main memory 1120 and execute the above processing. In at least one embodiment, storage 1130 is a non-transitory tangible storage medium.

Further, the program may be for realizing part of the functions described above. Furthermore, the program may be a so-called difference file (difference program) that implements the above-described functions in combination with other programs already stored in the storage 1130.

〈Additional notes〉
The solid fuel-fired boiler described in each embodiment can be understood, for example, as follows.

(1) A solid fuel-fired boiler has a solid fuel nozzle that is connected to the tip side of each conveying pipe and installed so as to face the inside of the furnace 78. The fuel burner, the combustion air supply means for individually supplying combustion air other than the primary air A1 to the solid fuel burner, and the supply amount of the combustion air supplied by each combustion air supply means are individually measured. The combustion air supply measuring means, the combustion air supply amount adjusting means for adjusting the supply amount of combustion air, and the burner air ratio setting means for setting the burner air ratio are provided, and the solid fuel is distributed to each conveying pipe. In a solid fuel-fired boiler in which solid fuel is injected into the furnace 78 from each solid fuel nozzle and burned under the supply of combustion air, an absorption method in which a value correlated to the amount of solid fuel supplied by each conveying pipe is individually measured. A value correlated to the solid fuel supply amount measured by the solid fuel supply amount measuring means using the absorption method, and a value correlated to the solid fuel supply amount measured by the solid fuel supply amount measuring means using the absorption method. Based on the supply amount of combustion air supplied to the solid fuel burner, the combustion air supply amount corresponding to the solid fuel supply amount is calculated so that the burner air ratio set by the burner air ratio setting means can be maintained. and an air supply amount control means for transmitting a control command signal to the combustion air supply amount adjustment means.

Solid fuel-fired boilers do not require any installation work inside the conveyor pipes, and use an absorption method that is less susceptible to the effects of moisture inside the conveyor pipes.By measuring values that correlate with the solid fuel supply amount, the amount of combustion air supplied can be determined. Can be adjusted.

(2) Furthermore, the solid fuel supply amount measuring means using the absorption method for a solid fuel fired boiler measures the solid fuel supply amount as a value correlated to the solid fuel supply amount.

Solid fuel-fired boilers do not require installation work inside the conveyor pipe, and can adjust the supply of combustion air by measuring the solid fuel supply using an absorption method that is less affected by moisture inside the conveyor pipe. can.

(3) Furthermore, the solid fuel supply amount measuring means of the solid fuel-fired boiler includes a first radiation part that emits waves or radiation from the outside of the conveyance pipe to the inside of the conveyance pipe, and a first radiation part that emits waves or radiation from the outside of the conveyance pipe. a first detection section that detects; a second radiation section that is provided at a different position from the first radiation section and emits waves or radiation from the outside of the conveyance tube to the inside of the conveyance tube; A second detection section that detects waves or radiation from outside the conveyance pipe, and a feature amount of the waves or radiation detected from the first detection section, and a feature amount that correlates with the density of the solid fuel and its fluctuations. A first density identification unit 201 that identifies the density of the solid fuel by comparing the first feature amount with density information in which the feature amount and the density are associated, and the wave or radiation characteristics detected by the second detection unit. a second density identifying unit 202 that identifies the density of the solid fuel by comparing the second feature amount, which is a feature amount that is a quantity and is correlated with the density of the solid fuel and its fluctuation, with the density information, and the first feature amount. and a calculation unit 203 that calculates the flow velocity of the solid fuel based on the second feature quantity, and a calculation unit 203 that calculates the flow velocity of the solid fuel based on the second feature amount, and a calculation unit 203 that calculates the flow velocity and the cross-sectional area of the conveyance pipe to the density specified by the first density specification unit or the density specified by the second density specification unit. A measuring unit 204 is provided that multiplies the amount of solid fuel supplied.

Solid fuel-fired boilers measure the amount of solid fuel supplied by an absorption method that detects waves or radiation emitted from the outside of the conveyor pipe. As a result, the solid fuel-fired boiler does not require any installation work inside the conveyor pipe, and can adjust the amount of combustion air supplied using an absorption method that is less affected by moisture inside the conveyor pipe.

(4) In addition, the solid fuel-fired boiler can be moved between the first radiating section and the conveying pipe, and the waves or radiation emitted from the first radiating section are shielded between the first radiating section and the conveying pipe. A first shutter 106A and a second shutter 106B that can be moved between the second radiating section and the conveying tube and shield waves or radiation emitted from the second radiating section between the second radiating section and the conveying tube. In preparation, the calculation unit 203 calculates the solid fuel based on the time when the first shutter 106A blocks waves or radiation, the time when the second shutter 106B blocks waves or radiation, the first feature amount, and the second feature amount. Calculate the flow velocity.

The solid fuel-fired boiler measures the amount of solid fuel supplied using the flow rate calculated based on the time when the first shutter 106A and the second shutter 106B shield waves or radiation. As a result, the solid fuel-fired boiler does not require any installation work inside the conveyor pipe, and can adjust the amount of combustion air supplied using an absorption method that is less affected by moisture inside the conveyor pipe.

(5) The solid fuel supply amount measuring device according to the present disclosure includes a first radiation part that emits waves or radiation from the outside of the transport pipe to the inside of the transport pipe, and a first radiation part that detects waves or radiation from the outside of the transport pipe. a second radiation part that is provided at a different position from the first radiation part and emits waves or radiation from the outside of the transport pipe to the inside of the transport pipe; and a wave or radiation emitted from the second radiation part. a second detection section that detects radiation from outside the transport pipe; and a first feature that is a feature amount of the wave or radiation detected from the first detection section and is a feature amount that correlates with the density of the solid fuel and its fluctuations. A first density identifying unit 201 identifies the density of the solid fuel by comparing the quantity with density information in which the feature quantity and the density are associated, and a characteristic quantity of waves or radiation detected by a second detection unit. , a second density identification unit 202 that identifies the density of the solid fuel by comparing a second feature amount, which is a feature amount correlated with the density of the solid fuel and its fluctuation, with density information; A calculation unit 203 that calculates the flow velocity of the solid fuel based on the feature quantity, and the density specified by the first density identification unit or the density identified by the second density identification unit are multiplied by the flow velocity and the cross-sectional area of the conveying pipe. , a measurement unit 204 that measures the amount of solid fuel supplied.

The solid fuel supply amount measuring device measures the solid fuel supply amount by an absorption method that detects waves or radiation emitted from the outside of the conveying pipe. Thereby, the solid fuel supply amount measuring device can measure the supply amount of solid fuel using an absorption method that does not require installation work inside the conveyance pipe and is not easily affected by moisture inside the conveyance pipe.

(6) The combustion method according to the present disclosure includes transport pipes that airflow transport solid fuel using primary air A1, and solid fuel nozzles connected to the tip side of each transport pipe and installed so as to face the inside of the furnace 78. a combustion air supply means for individually supplying combustion air other than the primary air A1 to the solid fuel burner; and a combustion air supply means for individually supplying combustion air other than the primary air A1 to the solid fuel burner; It is equipped with a combustion air supply measurement means for measuring, a combustion air supply amount adjustment means for adjusting the supply amount of combustion air, and a burner air ratio setting means for setting the burner air ratio, and distributes solid fuel to each conveying pipe. In a solid fuel-fired boiler in which solid fuel is injected into the furnace 78 from each solid fuel nozzle and burned under the supply of combustion air, a value correlated to the amount of solid fuel supplied by each conveying pipe is individually measured. Steps by the absorption method, values correlated to the solid fuel supply amount measured by the absorption method, and combustion air supplied to the solid fuel burner connected to the conveyance pipe measured by the combustion air supply measurement means. Based on the supply amount of the solid fuel, the combustion air supply amount adjusting means calculates the combustion air supply amount commensurate with the solid fuel supply amount so that the burner air ratio set by the burner air ratio setting means can be maintained. The method includes the step of transmitting a control command signal.

Users of the combustion method can calculate values that correlate to the amount of solid fuel supplied in solid fuel-fired boilers by using an absorption method that does not require installation work inside the conveyor pipe and is less affected by moisture inside the conveyor pipe. By measuring, the amount of combustion air supplied can be adjusted.

(7) The program according to the present disclosure includes transport pipes that airflow transport solid fuel using primary air A1, and solid fuel nozzles that are connected to the tip side of each transport pipe and are installed so as to face the inside of the furnace 78. A solid fuel burner, a combustion air supply means for individually supplying combustion air other than primary air A1 to the solid fuel burner, and individually measuring the supply amount of combustion air supplied by each combustion air supply means. A combustion air supply measuring means for adjusting the supply amount of combustion air, a combustion air supply amount adjusting means for adjusting the supply amount of combustion air, and a burner air ratio setting means for setting the burner air ratio, and the solid fuel is distributed to each conveying pipe. The computer of the solid fuel-fired boiler, which injects solid fuel from each solid fuel nozzle into the furnace 78 and burns under the supply of combustion air, individually measures the value correlated to the amount of solid fuel supplied by each conveying pipe. the step by the absorption method, the value correlated to the solid fuel supply amount measured by the absorption method, and the combustion air supplied to the solid fuel burner connected to the conveying pipe, measured by the combustion air supply measurement means. Combustion air supply amount adjusting means calculates a combustion air supply amount commensurate with the solid fuel supply amount based on the air supply amount so that the burner air ratio set by the burner air ratio setting means can be maintained. This step is executed as a step for transmitting a control command signal to the computer.

When the program user runs the program, the computer of the solid fuel-fired boiler can be set to a value that correlates to the amount of solid fuel supplied using an absorption method that does not require installation work inside the conveyor pipe and is less affected by moisture inside the conveyor pipe. By measuring this, the amount of combustion air supplied can be adjusted.

(8) The first radiation part of the solid fuel-fired boiler according to the present disclosure emits waves or radiation from a plurality of different positions in the circumferential direction of the conveyance pipe, and the first detection part emits waves or radiation from a plurality of different positions in the circumferential direction of the conveyance pipe. Waves or radiation are detected from different positions, and the first density identification unit 201 calculates a plurality of specified values by comparing the feature quantities of the plurality of waves or radiation detected from the first detection unit with the density information. , determine the density of the solid fuel.

Since the first density specifying unit 201 specifies the density based on a plurality of feature amounts, it is possible to specify the density with higher accuracy than when specifying the density based on a single feature amount. A solid fuel-fired boiler can measure the amount of solid fuel supplied based on the density specified with high accuracy, and can adjust the amount of combustion air supplied.

(9) Moreover, the first radiation part of the solid fuel fired boiler can be moved in the circumferential direction, and the first detection part can be moved in the circumferential direction.

The first density specifying unit 201 specifies the density based on a plurality of feature amounts detected by the movement of the first detection device 101, so the accuracy is lower than when specifying the density based on a single feature amount. High densities can be identified. A solid fuel-fired boiler can measure the amount of solid fuel supplied based on the density specified with high accuracy, and can adjust the amount of combustion air supplied.

(10) Further, the solid fuel supply amount measuring means for a solid fuel fired boiler includes a plurality of pairs of first radiating parts and first detecting parts, and at least a line segment connecting the pairs of first radiating parts and first detecting parts is , intersects with a line segment connecting another pair of the first radiation section and the first detection section.

The first density specifying unit 201 specifies the density based on a plurality of feature amounts detected by the plurality of first detection devices 101, so the density is more accurate than when specifying the density based on a single feature amount. can be identified. A solid fuel-fired boiler can measure the amount of solid fuel supplied based on the density specified with high accuracy, and can adjust the amount of combustion air supplied.

(11) The solid fuel-fired boiler according to the present disclosure uses a value correlated with the solid fuel supply amount and the supply amount of combustion air as explanatory variables, and uses the oxygen concentration in the furnace 78, the nitrogen oxides generated by combustion of the solid fuel, Learning generated by learning with at least one of carbon monoxide generated by combustion of solid fuel and the amount of unburned solid fuel as an explanatory variable, and burner air ratio or combustion air supply amount as an objective variable. storage means for storing the learned model, and the air supply amount control means transmits a control command signal to the combustion air supply amount adjustment means based on the learned model.

The solid fuel-fired boiler adjusts the combustion air by transmitting a control command signal to the combustion air supply amount adjusting means based on a learned model generated based on a plurality of explanatory variables. Thereby, the supply amount of combustion air can be adjusted based on the objective variable specified with high accuracy.

(12) The solid fuel of the solid fuel-fired boiler is pulverized coal, and it is equipped with a pulverizing means for pulverizing the supplied coal to produce pulverized coal, and a plurality of conveying pipes are connected to one pulverizing means. , the pulverized coal is airflow conveyed by the primary air A1, and the solid fuel-fired boiler distributes the pulverized coal produced by crushing by the crushing means to each conveying pipe and injects it into the furnace 78 from each solid fuel nozzle. , combusts under the supply of combustion air.

Solid fuel-fired boilers do not require any installation work inside the conveyor pipes, and use an absorption method that is less affected by moisture inside the conveyor pipes to measure values that correlate with the amount of pulverized coal supplied, thereby reducing the amount of combustion air supplied. Can be adjusted.

43 Coal pipe 101 First detection device 102 Second detection device 103 Gamma ray source 104 Heat shield 105 Detector 106 Shutter 200 Control device 201 First density identification section 202 Second density identification section 203 Calculation section 204 Measurement section 205 Storage section 206 Learning section 1100 Computer 1110 Processor 1120 Main memory 1130 Storage 1140 Interface

Claims (10)

a conveyance pipe that pneumatically conveys solid fuel using primary air;
A solid fuel burner having a solid fuel nozzle connected to the tip side of each conveying pipe and facing into the furnace;
Combustion air supply means for separately supplying combustion air other than the primary air to the solid fuel burner;
Combustion air supply measuring means for individually measuring the supply amount of the combustion air supplied by each combustion air supply means;
Combustion air supply amount adjusting means for adjusting the supply amount of the combustion air;
Equipped with burner air ratio setting means for setting the burner air ratio,
In a solid fuel-fired boiler that distributes the solid fuel to each of the conveying pipes and injects it into the furnace from each of the solid fuel nozzles and burns it under the supply of the combustion air,
solid fuel supply amount measuring means using an absorption method for individually measuring values correlated to the solid fuel supply amount conveyed by each of the conveying pipes;
A value correlated to the solid fuel supply amount measured by the solid fuel supply amount measurement means using the absorption method, and a value correlated to the solid fuel supply amount measured by the combustion air supply measurement means, and the amount of solid fuel supplied to the solid fuel burner connected to the conveyance pipe, which is measured by the combustion air supply measurement means. Based on the supply amount of combustion air that corresponds to the solid fuel supply amount, the combustion air supply amount corresponding to the solid fuel supply amount is calculated so that the burner air ratio set by the burner air ratio setting means can be maintained. air supply amount control means for transmitting a control command signal to the air supply amount adjustment means;
Equipped with
The solid fuel supply amount measuring means includes:
a first radiation part that emits waves or radiation from the outside of the transport pipe to the inside of the transport pipe;
a first detection unit that detects the wave or the radiation from outside the conveyance pipe;
a second radiation part that is provided at a different position from the first radiation part and emits waves or radiation from the outside of the transport pipe to the inside of the transport pipe;
a second detection unit that detects the wave or the radiation emitted from the second radiation unit from outside the conveyance pipe;
A first feature amount, which is a feature amount of the wave or the radiation detected by the first detection unit and is a feature amount that correlates with the density of the solid fuel and its fluctuation, is associated with the feature amount and the density. a first density identification unit that identifies the density of the solid fuel by comparing the density information with the density information;
A second feature amount, which is a feature amount of the wave or the radiation detected by the second detection unit and is a feature amount correlated with the density of the solid fuel and its fluctuation, is compared with the density information, a second density identification unit that identifies the density of the solid fuel;
a calculation unit that calculates the flow velocity of the solid fuel based on the first feature amount and the second feature amount;
a measurement unit that measures the solid fuel supply amount by multiplying the density specified by the first density specification unit or the density specified by the second density specification unit by the flow velocity and the cross-sectional area of the conveying pipe; Equipped with
a first shutter that is movable between the first radiating section and the conveying tube and shields the waves or the radiation emitted from the first radiating section between the first radiating section and the conveying tube;
a second shutter that is movable between the second radiation section and the conveyance tube and that blocks the waves or the radiation emitted from the second radiation section between the second radiation section and the conveyance tube; Prepare,
The calculation unit calculates a time when the first shutter blocks the wave or the radiation, a time when the second shutter blocks the wave or the radiation, the first feature, and the second feature. Calculate the flow rate of the solid fuel based on
The solid fuel supply amount measuring means sets a reference time by simultaneously moving the first shutter and the second shutter,
The first detection unit and the second detection unit detect the first feature amount and the second feature amount from the reference time that is the same time.
Solid fuel fired boiler. The solid fuel-fired boiler according to claim 1, wherein the solid fuel supply amount measuring means using the absorption method measures the solid fuel supply amount as a value correlated to the solid fuel supply amount. The first radiation section emits the waves or the radiation from a plurality of different positions in the circumferential direction of the conveyance pipe,
The first detection unit detects the wave or the radiation from a plurality of different positions in the circumferential direction of the conveyance pipe,
The first density specifying unit calculates the density of the solid fuel by comparing the feature quantities of the plurality of waves or the radiation detected by the first detecting unit with the density information and calculating the plurality of specified values. The solid fuel-fired boiler according to claim 1 . the first radiating section is movable in the circumferential direction;
The solid fuel-fired boiler according to claim 3 , wherein the first detection section is movable in the circumferential direction. The solid fuel supply amount measuring means includes a plurality of pairs of the first radiation section and the first detection section,
The solid fuel according to claim 3 , wherein a line segment connecting at least a pair of the first radiation part and the first detection part intersects a line segment connecting another pair of the first radiation part and the first detection part. Fire boiler. The value correlated with the solid fuel supply amount and the supply amount of combustion air are used as explanatory variables, and the oxygen concentration in the furnace, nitrogen oxides generated by combustion of the solid fuel, and monoxide generated by combustion of the solid fuel are set as explanatory variables. A memory for storing a trained model generated by learning using at least one of carbon and the amount of unburned content of the solid fuel as an explanatory variable and the burner air ratio or the combustion air supply amount as an objective variable. equipped with the means and
The solid fuel-fired boiler according to claim 1, wherein the air supply amount control means transmits a control command signal to the combustion air supply amount adjustment means based on the learned model. The solid fuel is pulverized coal,
comprising a pulverizing means for pulverizing the supplied coal to produce the pulverized coal,
A plurality of the conveying pipes are connected to one of the crushing means, and each conveys the pulverized coal in an air flow using the primary air,
The solid fuel-fired boiler distributes the pulverized coal generated by pulverization by the pulverizing means to each of the conveying pipes and injects it into the furnace from each of the solid fuel nozzles, and under the supply of the combustion air. burn,
The solid fuel-fired boiler according to any one of claims 1 to 6. a first radiation part that emits waves or radiation from the outside of the conveyance pipe in which the solid fuel is conveyed to the inside of the conveyance pipe;
a first detection unit that detects the wave or the radiation from outside the conveyance pipe;
a second radiation part that is provided at a different position from the first radiation part and emits waves or radiation from the outside of the transport pipe to the inside of the transport pipe;
a second detection unit that detects the wave or the radiation emitted from the second radiation unit from outside the conveyance pipe;
A first feature amount, which is a feature amount of the wave or the radiation detected by the first detection unit and is a feature amount that correlates with the density of the solid fuel and its fluctuation, is associated with the feature amount and the density. a first density identification unit that identifies the density of the solid fuel by comparing the density information with the density information;
A second feature amount, which is a feature amount of the wave or the radiation detected by the second detection unit and is a feature amount correlated with the density of the solid fuel and its fluctuation, is compared with the density information, a second density identification unit that identifies the density of the solid fuel;
a calculation unit that calculates the flow velocity of the solid fuel based on the first feature amount and the second feature amount;
a measurement unit that measures the solid fuel supply amount by multiplying the density specified by the first density specification unit or the density specified by the second density specification unit by the flow rate and the cross-sectional area of the conveyance pipe; ,
Equipped with
a first shutter that is movable between the first radiating section and the conveying tube and shields the waves or the radiation emitted from the first radiating section between the first radiating section and the conveying tube;
a second shutter that is movable between the second radiation section and the conveyance tube and that blocks the waves or the radiation emitted from the second radiation section between the second radiation section and the conveyance tube; Prepare,
The calculation unit calculates a time when the first shutter blocks the wave or the radiation, a time when the second shutter blocks the wave or the radiation, the first feature, and the second feature. Calculate the flow rate of the solid fuel based on
setting a reference time by simultaneously moving the first shutter and the second shutter;
The first detection unit and the second detection unit detect the first feature amount and the second feature amount from the reference time that is the same time.
Solid fuel supply amount measuring device. a solid fuel burner having a conveying pipe for pneumatically conveying solid fuel by primary air, a solid fuel nozzle connected to the tip side of each conveying pipe and installed so as to face the inside of the furnace; Combustion air supply means for individually supplying combustion air other than secondary air; Combustion air supply measuring means for individually measuring the supply amount of the combustion air supplied by each combustion air supply means; A combustion air supply amount adjusting means for adjusting a supply amount of combustion air and a burner air ratio setting means for setting a burner air ratio, the solid fuel being distributed to each of the conveying pipes from each of the solid fuel nozzles. In a solid fuel-fired boiler that is injected into the furnace and burns while being supplied with the combustion air,
a step using an absorption method of individually measuring a value correlated to the amount of solid fuel supplied by each of the conveying pipes;
A value correlated to the amount of solid fuel supplied measured by the absorption method and the amount of combustion air supplied to the solid fuel burner connected to the conveyance pipe measured by the combustion air supply measuring means. Based on this, a combustion air supply amount corresponding to the solid fuel supply amount is calculated, and the combustion air supply amount adjustment means transmitting a control command signal;
has
The absorption method step includes:
detecting the waves or the radiation from a first radiation section that emits the waves or the radiation from the outside of the transport pipe to the inside of the transport pipe;
The waves or the radiation emitted from the second radiation part, which is provided at a different position from the first radiation part and which emits waves or radiation from the outside of the transport pipe to the inside of the transport pipe, are emitted from the outside of the transport pipe. a step of detecting;
A first feature quantity that is a feature quantity of the wave motion or the radiation detected in the step of detecting the wave motion or the radiation from the first radiation part and is a feature quantity that is correlated with the density of the solid fuel and its fluctuation. , identifying the density of the solid fuel in comparison with density information in which the feature quantity and the density are associated;
A second feature quantity that is a feature quantity of the wave motion or the radiation detected in the step of detecting the wave motion or the radiation from the second radiation part and is a feature quantity that is correlated with the density of the solid fuel and its fluctuation. , identifying the density of the solid fuel by comparing it with the density information;
calculating the flow velocity of the solid fuel based on the first feature amount and the second feature amount;
identifying the density of the solid fuel by comparing the density identified in the step of identifying the density of the solid fuel by comparing the first feature amount with the density information or the second feature amount with the density information; a step of multiplying the density specified in the step by the flow rate and the cross-sectional area of the conveying pipe to measure the solid fuel supply amount;
In the step of calculating, it is movable between the first radiation part and the conveyance pipe, and the wave or the radiation emitted from the first radiation part is shielded between the first radiation part and the conveyance pipe. The first shutter is movable between the second radiating section and the conveying tube at the time when the wave motion or the radiation is shielded, and the radiation from the second radiating section is moved between the second radiating section and the conveying tube. calculating the flow velocity of the solid fuel based on the time when the second shutter that shields the wave motion or the radiation shields the wave motion or the radiation, the first feature amount, and the second feature amount;
In the step using the absorption method, a reference time is set by simultaneously moving the first shutter and the second shutter,
The step of detecting the wave motion or the radiation from the first radiation section and the step of detecting the wave motion or the radiation from the second radiation section include detecting the first feature amount and the second feature amount at the same time. Detect from reference time
Combustion method. a solid fuel burner having a conveying pipe for pneumatically conveying solid fuel by primary air, a solid fuel nozzle connected to the tip side of each conveying pipe and installed so as to face the inside of the furnace; Combustion air supply means for individually supplying combustion air other than secondary air; Combustion air supply measuring means for individually measuring the supply amount of the combustion air supplied by each combustion air supply means; A combustion air supply amount adjusting means for adjusting a supply amount of combustion air and a burner air ratio setting means for setting a burner air ratio, the solid fuel being distributed to each of the conveying pipes from each of the solid fuel nozzles. A computer for a solid fuel-fired boiler that is injected into the furnace and burns under the supply of the combustion air,
a step using an absorption method of individually measuring a value correlated to the amount of solid fuel supplied by each of the conveying pipes;
A value correlated to the amount of solid fuel supplied measured by the absorption method and the amount of combustion air supplied to the solid fuel burner connected to the conveyance pipe measured by the combustion air supply measuring means. Based on this, a combustion air supply amount corresponding to the solid fuel supply amount is calculated, and the combustion air supply amount adjustment means transmitting a control command signal;
Run it as
The absorption method step includes:
detecting the waves or the radiation from a first radiation section that emits the waves or the radiation from the outside of the transport pipe to the inside of the transport pipe;
The waves or the radiation emitted from the second radiation part, which is provided at a different position from the first radiation part and which emits waves or radiation from the outside of the transport pipe to the inside of the transport pipe, are emitted from the outside of the transport pipe. a step of detecting;
A first feature quantity that is a feature quantity of the wave motion or the radiation detected in the step of detecting the wave motion or the radiation from the first radiation part and is a feature quantity that is correlated with the density of the solid fuel and its fluctuation. , identifying the density of the solid fuel in comparison with density information in which the feature quantity and the density are associated;
A second feature quantity that is a feature quantity of the wave motion or the radiation detected in the step of detecting the wave motion or the radiation from the second radiation part and is a feature quantity that is correlated with the density of the solid fuel and its fluctuation. , identifying the density of the solid fuel by comparing it with the density information;
calculating the flow velocity of the solid fuel based on the first feature amount and the second feature amount;
identifying the density of the solid fuel by comparing the density identified in the step of identifying the density of the solid fuel by comparing the first feature amount with the density information or the second feature amount with the density information; a step of multiplying the density specified in the step by the flow rate and the cross-sectional area of the conveying pipe to measure the solid fuel supply amount;
In the step of calculating, it is movable between the first radiation part and the conveyance pipe, and the wave or the radiation emitted from the first radiation part is shielded between the first radiation part and the conveyance pipe. The first shutter is movable between the second radiating section and the conveying tube at the time when the wave motion or the radiation is shielded, and the radiation from the second radiating section is moved between the second radiating section and the conveying tube. calculating the flow velocity of the solid fuel based on the time when the second shutter that shields the wave motion or the radiation shields the wave motion or the radiation, the first feature amount, and the second feature amount;
In the step using the absorption method, a reference time is set by simultaneously moving the first shutter and the second shutter,
The step of detecting the wave motion or the radiation from the first radiation section and the step of detecting the wave motion or the radiation from the second radiation section include detecting the first feature amount and the second feature amount at the same time. Detect from reference time
program.

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