Combustion equipment state determination device, state determination method and program product

Abstract

The present invention provides a state determination device for a combustion device, which determines the combustion state of the combustion device. The combustion device comprises: a furnace main body, which defines a processing space; a grate, which transports the incinerated material along the conveying direction in the processing space; and a feeder, which supplies the incinerated material to the processing space, and the processing space is divided into a plurality of sections in the conveying direction. The state determination device for the combustion device comprises: an image acquisition unit, which acquires an image of the feeder and the sections, i.e., a processed image; and a state determination unit, which determines the combustion state of the feeder and the sections based on the processed image.

Description

Technical Field

[0001] The present invention relates to a state determination device, a state determination method and a program of a combustion device.

[0002] This application claims priority to Japanese Patent Application No. 2019-228238 filed in Japan on December 18, 2019, the contents of which are incorporated herein by reference. Background Art

[0003] Patent document 1 discloses a technology for a waste incinerator that extracts a combustion area from a photographic image taken by a camera on the downstream side of the combustion chamber to detect the combustion state of the combustion chamber, thereby being able to fully respond to changes in the combustion state, changes in flames, etc.

[0004] Previous technical literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent No. 5755171 Summary of the Invention

[0007] Technical issues to be solved by the invention

[0008] The state of the flames burning the incineration material in the combustion equipment changes depending on the combustion conditions of the incineration material in the feeder and drying section before the flames are generated. However, in photographic images, the incineration material in the feeder and drying section is obscured by the flames, making it difficult to understand the combustion conditions in the feeder and drying section.

[0009] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a state determination device, a state determination method, and a program for a combustion device.

[0010] Means for solving technical problems

[0011] The state determination device of the combustion equipment involved in the present invention determines the combustion state of the combustion equipment. The combustion equipment includes: a furnace main body, which defines a processing space; a grate, which transports the incinerated material along the conveying direction in the processing space; and a feeder, which supplies the incinerated material to the processing space, and the processing space is divided into multiple sections in the conveying direction. The state determination device of the combustion equipment is provided with: an image acquisition unit, which acquires an image of the feeder and the section, that is, a processed image; and a state determination unit, which determines the combustion state of the feeder and the section based on the processed image.

[0012] The state determination method involved in the present invention determines the combustion state of a combustion device, wherein the combustion device comprises: a furnace main body, which defines a processing space; a grate, which transports the incinerated material along the conveying direction in the processing space; and a feeder, which supplies the incinerated material to the processing space, and the processing space is divided into multiple sections in the conveying direction. The state determination device comprises the following steps: obtaining an image of the feeder and the sections, i.e., a processed image; and determining the combustion state of each of the feeder and the sections based on the processed image.

[0013] The program involved in the present invention is a program of a state determination device for determining the combustion state of a combustion device, wherein the combustion device comprises: a furnace main body, which defines a processing space; a grate, which transports the incinerated material along the conveying direction in the processing space; and a feeder, which supplies the incinerated material to the processing space, and the processing space is divided into multiple sections in the conveying direction. The program causes a computer to execute the following steps: obtaining an image of the feeder and the sections, i.e., a processed image; and determining the combustion state of each of the feeder and the sections based on the processed image.

[0014] Effects of the Invention

[0015] According to the combustion device state determination device, state determination method, and program of the present invention, it is possible to grasp the combustion state in the feeder and the section of the combustion equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a diagram showing the structure of a combustion plant according to an embodiment of the present invention.

[0017] Figure 2 This is a schematic block diagram showing the configuration of a state identification device according to an embodiment of the present invention.

[0018] Figure 3 This is a flowchart showing the operation of the state control device according to the embodiment of the present invention.

[0019] Figure 4 This is a schematic block diagram showing the configuration of a state identification device according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic block diagram showing the structure of a computer according to at least one embodiment. DETAILED DESCRIPTION

[0021] <First embodiment>

[0022] Structure of combustion device

[0023] The following describes the structure of a combustion facility 100 according to the first embodiment. The combustion facility 100 according to the first embodiment is a facility for incinerating waste as the incineration material 400. Examples of the combustion facility 100 include a waste incineration stoker and a biomass fluidized bed boiler. The combustion facility 100 according to the first embodiment is a waste incineration stoker.

[0024] Figure 1 1 is a diagram showing the configuration of a combustion plant 100 according to the first embodiment. The combustion plant 100 includes a stoker 1, a waste heat recovery boiler 8, a cooling tower 9, a dust collector 11, a chimney 12, and a state determination device 300.

[0025] The stoker 1 is a furnace that burns the incineration material 400 while conveying the incineration material 400. Examples of the incineration material 400 include waste and biomass. Figure 1 The incineration material 400 in the stoker 1 is waste. As the incineration material 400 is burned in the stoker 1, exhaust gas is generated from the stoker 1. The exhaust gas is sent to the waste heat recovery boiler 8 installed above the stoker 1.

[0026] The waste heat recovery boiler 8 heats water by exchanging heat between the exhaust gas and the water, generating steam. This steam is utilized in external equipment (not shown). The exhaust gas passing through the waste heat recovery boiler 8 is cooled in a cooling tower 9 and then transferred to a dust collector 11. After removing soot and dust in the dust collector 11, the exhaust gas is discharged into the atmosphere through a chimney 12.

[0027] Next, the structure of the coal-fired furnace 1 will be described. Figure 1 As shown, the stoker 1 includes a furnace body 10, a furnace 7 extending upward from the furnace body 10, a hopper 3 for temporarily storing the incinerated material 400, a feeder 31 for supplying the incinerated material 400 from the hopper 3 into the furnace body 10, and a stoker 6 disposed at the bottom of the furnace body 10. Furthermore, the stoker 1 includes a discharge chute 13 for discharging the incinerated material 400 to the outside, a wind box 2 disposed below the stoker 6, a cleaning roller 210 for moving the incinerated material 400 to the discharge chute 13, and a camera 220 for capturing processed images of the furnace body 10.

[0028] Furthermore, the stoker 1 includes a blower B1 for sending air into the primary air line L1 and the secondary air line L2 , the primary air line L1 for supplying air to the wind box 2 , and the secondary air line L2 for supplying air to the furnace 7 .

[0029] The stoker 6 is composed of a plurality of grates 61. The grates 61 include a fixed grate 61A and a movable grate 61B. The fixed grate 61A is a fixed grate 61. The movable grate 61B stirs the incinerated material 400 on the grate 61 by moving at a constant speed in the conveying direction +Da and the reverse conveying direction -Da. The conveying direction +Da is the direction from the hopper 3 toward the discharge chute 13. The reverse conveying direction -Da is the opposite direction of the conveying direction Da.

[0030] A processing space V for burning the incineration material 400 is formed within the furnace body 10. Within this processing space V, the incineration material 400 is conveyed from the feeder 31 by the stoker 6 in the conveying direction +Da toward the discharge chute 13. The combusted incineration material 400 is discharged to the outside through the discharge chute 13. In this embodiment, the stoker 6 is horizontally installed. However, in another embodiment, the stoker 6 may be inclined relative to the horizontal plane.

[0031] The furnace main body 10 is designed to be divided into a drying section 21, a combustion section 22, and a post-combustion section 23, sequentially from the upstream side in the conveying direction +Da. The drying section 21, the combustion section 22, and the post-combustion section 23 define the processing space V along the conveying direction Da. The drying section 21 is used to dry the incineration material 400 supplied from the hopper 3 before combustion. The combustion section 22 and the post-combustion section 23 are used to burn the dry incineration material 400. In the combustion section 22, the pyrolysis gas generated from the incineration material 400 generates a flame F. In the post-combustion section 23, the fixed carbon in the incineration material 400 is burned, so no flame F is generated. In other words, the flame F accompanying the combustion is mainly formed above the combustion section 22.

[0032] The furnace 7 extends upward from the upper portion of the furnace body 10. Exhaust gas within the processing space V is transported to the waste heat recovery boiler 8 through the furnace 7. A primary air line L1 connects the blower B1 and the wind box 2. By driving the blower B1, air is supplied to the wind box 2 through the primary air line L1. The wind box 2 supplies air from below the grate 61. A secondary air line L2 connects the blower B1 and the interior of the furnace 7. Combustion air is supplied to the interior of the furnace 7 from above the grate 61 through the secondary air line L2. The wind boxes 2 form the bottom surface of the processing space V. A plurality of wind boxes 2 are arranged along the conveying direction Da.

[0033] The cleaning roller 210 rotates to move the incineration material 400 from the post-combustion stage 23 to the discharge chute 13. The cleaning roller 210 rotates at a time interval set by the state determination device 300.

[0034] Camera 220 is a camera that includes both a visible camera and an infrared camera. The processed image captured by camera 220 captures the feeder 31, drying section 21, combustion section 22, and post-combustion section 23. The processed image generated by camera 220 captures the bright flames emanating from the incinerated material 400. The infrared camera can capture both flame transmission images and temperature distribution images. The infrared camera measures different wavelengths of infrared light in the flame transmission image and the temperature image. The infrared camera captures flame transmission images by receiving infrared light of a wavelength that transmits the flame. On the other hand, the infrared camera captures temperature distribution images by receiving infrared light of a different wavelength than the flame transmission image.

[0035] The state determination device 300 acquires and processes images from the camera 220 to determine brightness and other parameters. It then determines the combustion status of the feeder 31, drying section 21, combustion section 22, and post-combustion section 23, and controls the speed of the grate 61 and the amount of air supplied by the wind box 2. The state determination device 300 includes an image acquisition unit 310, a brightness determination unit 320, a point determination unit 330, a temperature determination unit 340, a state determination unit 350, and a recommendation unit 360. The state determination device 300 is connected to the combustion equipment 100 via a wired or wireless connection.

[0036] The image acquisition unit 310 acquires a processing image from the camera 220 .

[0037] The brightness determination unit 320 determines the brightness of each of the feeder 31, the drying section 21, the combustion section 22, and the post-combustion section 23 based on the processed image acquired by the image acquisition unit 310. Specifically, the brightness determination unit 320 determines the brightness in the following manner.

[0038] The brightness determination unit 320 receives processed images captured by the visible camera and infrared camera from the camera 220 and acquired by the image acquisition unit 310. Hereinafter, the processed images captured by the visible camera are referred to as visible images, and the processed images captured by the infrared camera are referred to as infrared images. Furthermore, the infrared images include flame transmission images and temperature distribution images. Since the position of the camera 220 is fixed, it is possible to determine the areas in the processed images captured by the camera 220 that capture the feeder 31, drying section 21, combustion section 22, and post-combustion section 23, respectively.

[0039] Because flame F exists within combustion section 22, the visible image primarily captures post-combustion section 23 in the lower portion of the visible image, while flame F is captured in the upper portion. The feeder 31 and drying section 21 are obscured by flame F and are rarely captured in the visible image. On the other hand, because the infrared camera of camera 220 sees through flame F, post-combustion section 23 is captured in the lower portion of the flame-perspective image, combustion section 22 is captured in the middle portion, and feeder 31 and drying section 21 are captured in the upper portion.

[0040] The brightness determination unit 320 determines the brightness associated with the feeder 31, the drying section 21, the combustion section 22, and the post-combustion section 23 based on the visible image and the flame perspective image. Specifically, the brightness determination unit 320 determines the brightness of each pixel in the area of the visible image where the post-combustion section 23 is captured, and the brightness of each pixel in the area where the flame F is captured.

[0041] After adjusting the contrast and brightness of the visible image using pre-set values, the brightness determination unit 320 binarizes the determined brightness according to a pre-set binarization threshold. The brightness determination unit 320 divides the visible image into a plurality of grids. The brightness determination unit 320 then classifies the brightness of each grid into bright and dark grids by comparing the sum or average of the binarized brightness values in each grid with a pre-set classification threshold. For example, if the sum of the brightness values in a grid exceeds the pre-set classification threshold, the grid is classified as bright.

[0042] The processed image at the location where the flame F exists shows a brightness higher than that of the flame F. Therefore, as described above, the state identification device 300 can understand the location and shape of the flame F in the visible image by binarizing the visible image and identifying the location where the bright grid exists.

[0043] The brightness determination unit 320 determines the brightness of the feeder 31 and the drying section 21 captured in the upper portion of the flame fluoroscopy image. The brightness determination unit 320 calculates the average and standard deviation of the brightness of the regions capturing the feeder 31 and the drying section 21 in the flame fluoroscopy image.

[0044] In the flame fluoroscopic image, the higher the temperature, the higher the brightness. When there is a flame F in the feeder 31, the brightness of the area where the feeder 31 is captured becomes higher, so the state determination device 300 can determine whether there is a flame F in the feeder 31 based on this brightness.

[0045] Furthermore, since the temperature of the incineration object 400 dried in the drying section 21 is higher than that of the incineration object 400 not dried, the state identification device 300 can determine the degree of drying of the incineration object 400 based on the brightness of the region of the flame fluoroscopy image that captures the drying section 21. Specifically, if the region of the flame fluoroscopy image that captures the drying section 21 shows high brightness, it can be seen that the temperature of the incineration object 400 in the drying section 21 is high and the incineration object 400 is sufficiently dried. However, if the region of the flame fluoroscopy image that captures the drying section 21 shows low brightness, it can be seen that the temperature of the incineration object 400 in the drying section 21 is low and the incineration object 400 is insufficiently dried.

[0046] Furthermore, if the standard deviation of the brightness in the region of the flame fluoroscopic image capturing the drying section 21 is high, the temperature of the incineration materials 400 present in the drying section 21 varies, indicating that the amount of incineration materials 400 present in the drying section 21 is large and the incineration materials 400 are piled high in the vertical direction. On the other hand, if the standard deviation of the brightness in the region of the flame fluoroscopic image capturing the drying section 21 is low and the incineration materials 400 are piled low in the vertical direction, it is understood that the temperature of the incineration materials 400 present in the drying section 21 does not vary, indicating that the amount of incineration materials 400 present in the drying section 21 is small.

[0047] The point identification unit 330 identifies the burnout point Z, which is the rear end of the flame F in the conveying direction Da caused by the burning of the incineration object 400, based on the bright and dark grids of the visible image determined by the brightness identification unit 320. Specifically, the point identification unit 330 identifies the burnout point Z through the following operation.

[0048] The point determination unit 330 receives the data obtained by the brightness determination unit 320, which determines the brightness of the processed image and divides it into grids. It then determines the lowest position in the bright grid in the processed image. The burnout point Z is determined by determining the distance between the bright grid and the point connecting the feeder 31 and the drying section 21. For example, if the distance is 2.5 meters, the burnout point is determined to be 2.5 meters.

[0049] The temperature determination unit 340 determines the temperature of the post-combustion section 23 based on the temperature distribution image of the camera 220 acquired by the image acquisition unit 310. For example, the temperature determination unit 340 determines whether the portion indicating a temperature exceeding a preset threshold value is located in the lower portion, the middle portion, or the upper portion of the processed image of the post-combustion section 23.

[0050] The state determination unit 350 determines the combustion state based on the brightness of the visible image and the brightness of the flame fluoroscopic image determined by the brightness determination unit 320. In this embodiment, the combustion state is any of "stable combustion," "uneven combustion," "early combustion," "feeder combustion," "poor drying," "poor burnout," and "poor boundary."

[0051] "Uneven combustion" refers to a state in which the combustion in the furnace width direction in the combustion section 22 is uneven. "Early combustion" refers to a state in which the generation of flame F is completed in the front half of the combustion section 22. "Feeder combustion" refers to a state in which the incineration material 400 is burned on the feeder 31. "Poor drying" refers to a state in which the incineration material 400 supplied to the drying section 21 is not dried, and the layer height of the incineration material 400 in the drying section 21 becomes too large. "Poor burnout" refers to a state in which flame F is continuously generated in the post-combustion section 23. "Poor boundary" refers to a state in which the view inside the furnace is blocked, making it difficult to confirm the combustion status of the incineration material 400.

[0052] The state determination unit 350 associates the combustion state with the brightness state of the processed image during the combustion state, and compares the brightness of the processed image determined by the brightness determination unit 320 with this relationship to determine the combustion state. An example of the relationship between brightness and combustion state will be described later.

[0053] The recommendation unit 360 recommends to the user of the combustion apparatus 100 a recommended operation regarding the speed of the grate 61 or the amount of air supplied from the wind box 2 based on the combustion state determined by the state determination unit 350, the burnout point Z determined by the point determination unit 330, and the temperature determined by the temperature determination unit 340. For example, the recommendation unit 360 compares the combustion state, the burnout point Z, and the temperature with a table that associates the combustion state, the burnout point Z, the temperature, and the recommended operation to determine and recommend a recommended operation. Examples of the recommended operation include a recommended speed of the grate 61 or a recommended amount of air supplied from the wind box 2.

[0054] For example, when the temperature in the post-combustion section 23 determined by the temperature determination unit 340 is lower than a preset reference temperature, the recommendation unit 360 recommends an operation of increasing the amount of air supplied to the post-combustion section 23 by the wind box 2 of the post-combustion section 23 than the current amount.

[0055] Description of Status Data

[0056] As described above, the state identification unit 350 identifies the combustion state based on the state data that correlates the combustion state with the brightness state of the processed image.

[0057] The state data is associated with the combustion state "uneven combustion." In the visible image, the proportion of bright cells in the lower portion of the region where the flame F is captured (e.g., the lower 3 / 13 of the region) remains below a non-uniform threshold value (e.g., 50%). Specifically, if the proportion of bright cells in the lower portion of the region where the flame F is captured remains below the non-uniform threshold value, the state determination unit 350 determines the combustion state as "uneven combustion."

[0058] When combustion occurs uniformly in combustion section 22, flame F is generated over a wide area of combustion section 22, and the proportion of bright cells in the lower portion of the area where flame F is captured exceeds the unevenness threshold. On the other hand, when combustion occurs unevenly in combustion section 22, flame F is generated only in a portion of combustion section 22, and the proportion of bright cells in the lower portion of the area where flame F is captured is below the unevenness threshold. Therefore, state determination unit 350 can determine the combustion state of uneven combustion through the above-described operation.

[0059] The state data is associated with the combustion state "early combustion," and the percentage of bright cells in the visible image remains below an early combustion threshold (e.g., 10%) in the area to the right or left of the area where the flame F is captured. Specifically, if the percentage of bright cells in the area to the right or left of the area where the flame F is captured remains below the early combustion threshold, the state determination unit 350 determines the combustion state as "early combustion."

[0060] like Figure 1 As shown, camera 220 is located on the side of post-combustion section 23. Therefore, as flame F approaches drying section 21, that is, if premature combustion occurs, the width of flame F narrows according to perspective, and the proportion of bright cells decreases in the right or left area of the area where flame F is captured. Thus, premature combustion can be determined based on the proportion of bright cells in the right or left area of the area where flame F is captured.

[0061] The state data associates the combustion state with "feeder combustion." In the flame fluoroscopic image, the average brightness value in the region where the feeder 31 is captured remains above the feeder combustion threshold. Specifically, if the average brightness value in the region where the feeder 31 is captured remains above the feeder combustion threshold, the state determination unit 350 determines the combustion state as "feeder combustion." In other words, the state determination unit 350 determines the combustion state of the feeder 31.

[0062] As the incineration material 400 burns, the temperature rises, and the brightness of the corresponding area increases. Therefore, if the average brightness in the area where the feeder 31 is imaged is above the feeder combustion threshold, it means that the incineration material 400 is burning in the feeder, which corresponds to "feeder combustion."

[0063] The state data associates the combustion state with "poor drying." In the flame fluoroscopic image, the portion of the image capturing the drying section 21 is maintained in a state where the brightness value below the poor drying threshold 1 is above the poor drying threshold 1, or where the brightness value below the poor drying threshold 2 is above the poor drying threshold 2, and the brightness standard deviation is above the poor drying threshold 3. Specifically, the state determination unit 350 determines the combustion state as "poor drying" when the brightness value below the poor drying threshold 1 is above the poor drying threshold 1, or when the brightness value below the poor drying threshold 2 is above the poor drying threshold 2, and the brightness standard deviation is above the poor drying threshold 3. The poor drying threshold 1 is a lower threshold than the poor drying threshold 2. In other words, the state determination unit 350 determines the combustion state of the drying section 21.

[0064] If drying is insufficient in the drying section 21, moisture remains in the incineration objects 400, causing the temperature to drop and increasing the brightness values below the insufficient drying threshold 1. Furthermore, if drying is insufficient in the drying section 21, the brightness values below the insufficient drying threshold 2 increase. This increases the standard deviation of brightness due to the presence of a mixture of sufficiently dried incineration objects 400 with high brightness and insufficiently dried incineration objects 400 with low brightness.

[0065] The state data associates the combustion state with "poor burnout." In the visible image, in which the brightness determination unit 320 determines the bright and dark grids, the bright grids in the region where the post-combustion stage 23 is captured remain above a poor burnout threshold (e.g., 10%). Specifically, if the bright grids in the region where the post-combustion stage 23 is captured remain above the poor burnout threshold, the state determination unit 350 determines the combustion state as "poor burnout."

[0066] If combustion of the incineration material 400 occurs in the afterburning stage 23, the combustion of the fixed carbon in the incineration material 400, i.e., afterburning, will not proceed sufficiently. This state is also referred to as poor burnout. If combustion of the incineration material 400 occurs in the afterburning stage 23, a flame F is generated in the afterburning stage 23, resulting in a high brightness. Therefore, if the bright cells in the area where the afterburning stage 23 is captured are above the poor burnout threshold, it can be determined that the combustion state is "poor burnout."

[0067] The state data associates the combustion state with "poor visibility" and states that, in the visible image where the brightness determination unit 320 has determined bright and dark grids, the ratio of bright grids in the lower portion of the region where the flame F is captured (e.g., the lower 3 / 13 of the region) remains constant for a period of time (e.g., 5 seconds) exceeding a poor visibility threshold. Alternatively, the state data associates the combustion state with "poor visibility" and states that, in the flame fluoroscopic image, the combustion state is set to "poor visibility" if, in the region where the combustion segment 22 is captured, the average brightness value is below an average value threshold, or if the brightness dispersion value is above dispersion threshold 1 (e.g., 1000), or if the brightness dispersion value is below dispersion threshold 2 (e.g., 80). In other words, in these cases, the state determination unit 350 determines the combustion state as "poor visibility."

[0068] The visibility of the processing space V of the combustion equipment 100 may be obstructed due to, for example, the scattering of the incineration material 400. In this case, the scattering of the incineration material 400 in the combustion section 22 may cause the brightness of the combustion section 22 to change significantly within a short period of time. Alternatively, the scattering of the incineration material 400 may cause the average brightness across the entire combustion section 22 to fall below a predetermined value. Alternatively, the dispersion of the brightness within the combustion section 22 may exceed a dispersion threshold value 1 due to the localized scattering of the incineration material 400 across a wide area of the combustion section 22, or the dispersion of the brightness within the combustion section 22 may fall below a dispersion threshold value 2 due to the incineration material 400 covering a wide area of the combustion section 22.

[0069] On the other hand, when the combustion state does not correspond to any of "uneven combustion", "early combustion", "feeder combustion", "poor drying", "poor burnout" and "poor visibility", the state determination unit 350 determines the combustion state as "stable combustion".

[0070] Operation of the status determination device

[0071] Next, the operation of the state identification device 300 will be described. Figure 3 3 is a flowchart showing the operation of the state identification device 300 .

[0072] The image acquisition unit 310 acquires processed images from the visible camera and the infrared camera of the camera 220 (step S1 ). That is, the image acquisition unit 310 acquires a visible image, a flame perspective image, and a temperature distribution image from the camera 220 .

[0073] The brightness determination unit 320 determines the brightness of the visible image and the flame fluoroscopy image based on the visible image and the flame fluoroscopy image acquired by the image acquisition unit 310 in step S1 , and calculates the average value and standard deviation of the brightness of the flame fluoroscopy image (step S2 ).

[0074] The state determination unit 350 compares the brightness determined by the brightness determination unit 320 in step S2, the calculated average value, and the standard deviation with the state data to determine the combustion state of the combustion equipment 100 (step S3). Specifically, the state determination unit 350 determines whether the combustion state is "stable combustion," "uneven combustion," "early combustion," "feeder combustion," "poor drying," "poor burnout," or "poor visibility."

[0075] The point determination unit 330 determines the burn-out point Z based on the brightness of the visible image determined by the brightness determination unit 320 in step S2 (step S4 ).

[0076] The temperature determination unit 340 receives the temperature distribution image acquired by the image acquisition unit 310 to determine the temperature of the post-combustion section 23 (step S5 ).

[0077] The recommendation section 360 recommends a recommended operation of the speed of the grate 61 or the amount of air supplied by the wind box 2 based on the combustion state determined in step S3 , the burnout point Z determined in step S4 , and the temperature determined in step S5 (step S6 ).

[0078] Through the above-described operations, the user of the combustion equipment 100 can grasp the combustion status of each of the feeder 31 , the drying section 21 , the combustion section 22 , and the post-combustion section 23 of the combustion equipment 100 .

[0079] Effect

[0080] The state determination device 300 of the combustion equipment 100 involved in the present invention determines the combustion state of the combustion equipment 100, and the combustion equipment 100 includes: a furnace main body 10, which defines a processing space V; a grate 61, which transports the incineration material 400 along the conveying direction Da in the processing space V; and a feeder 31, which supplies the incineration material 400 to the processing space V, and the processing space V is divided into multiple sections in the conveying direction Da. In the state determination device 300, there are: an image acquisition unit 310, which acquires an image of the feeder 31 and the section, that is, a processed image; and a state determination unit 350, which determines the combustion state of the feeder 31 and the section based on the processed image.

[0081] The user of the state determination device 300 can grasp the combustion state in the feeder 31 and the section of the combustion equipment 100 .

[0082] Furthermore, the image acquisition unit 310 of the state identification device 300 of the combustion equipment 100 acquires processed images captured by the visible camera and the infrared camera.

[0083] Since the state determination device 300 acquires processed images captured by the visible camera and the infrared camera, it can acquire processed images even in areas obscured by the flame F or the like present in the processing space V. Thus, the user of the state determination device 300 can understand the combustion state in areas obscured by the flame F or the like in the feeder 31 and the drying section 21 of the combustion equipment 100.

[0084] In addition, the sections of the state determination device 300 are divided into a drying section 21, a combustion section 22 and a post-combustion section 23 from the upstream of the conveying direction Da. The processed image is an image of the feeder 31, the drying section 21, the combustion section 22 and the post-combustion section 23. The state determination unit 350 determines the combustion state of each of the feeder 31, the drying section 21, the combustion section 22 and the post-combustion section 23.

[0085] The user of the state determination device 300 can grasp the combustion states in the feeder 31 , the drying section 21 , the combustion section 22 , and the post-combustion section 23 of the combustion equipment 100 .

[0086] Furthermore, the brightness determination unit 320 determines the brightness of images respectively associated with the feeder 31 , the drying section 21 , the combustion section 22 , and the post-combustion section 23 based on the processed image, and the state determination unit 350 determines the combustion state based on the brightness.

[0087] Since the state identifying device 300 identifies the brightness of the processed image, the user of the state identifying device 300 can understand the position of the flame F and can also understand the combustion state of the incineration object 400 based on the brightness.

[0088] Furthermore, the state determination device 300 includes: a point determination unit 330 for determining the end of the flame F caused by the combustion of the incineration object 400 in the conveying direction, i.e., the burnout point Z, based on the brightness; a temperature determination unit 340 for determining the temperature of the post-combustion section 23 based on the processed image; and a recommendation unit 360 for recommending a recommended operation of the combustion equipment 100 based on the determined combustion state, burnout point Z, and temperature.

[0089] Thus, the user of the state determination device 300 can receive advice on recommended operations associated with the combustion state determined by the state determination device 300 and can operate the combustion appliance 100 more easily.

[0090] Furthermore, the combustion equipment 100 includes the wind box 2 that supplies air from below the grate 61 , and the recommended operation of the state determination device 300 is an operation related to the speed of the grate 61 or the amount of air supplied from the wind box 2 .

[0091] Thus, the user of the state determination device 300 can receive advice on operations related to the speed of the grate 61 or the amount of air supplied from the wind box 2 determined by the state determination device 300, that is, recommended operations, and can operate the combustion equipment 100 more simply.

[0092] Furthermore, the combustion state of the state determining device 300 indicates any one of stable combustion, uneven combustion, early combustion, feeder combustion, poor drying, poor burnout, and poor boundary conditions.

[0093] The state identifying device 300 identifies the combustion state, which indicates any of stable combustion, uneven combustion, premature combustion, feeder combustion, poor drying, poor burnout, and poor boundary conditions.

[0094] <Second embodiment>

[0095] The combustion equipment 100 according to the second embodiment will be described below. The state identification device 300 according to the second embodiment has a configuration including a model generation unit 370 and a model storage unit 380 in addition to the configuration of the state identification device 300 according to the first embodiment.

[0096] The model generation unit 370 generates a learned model learned through supervised learning using a dataset consisting of input samples including the brightness of the drying section 21 and output samples including the combustion status of the drying section 21, and stores it in the model storage unit 380. For example, the model generation unit 370 uses the brightness value of the visible image as the input sample. Furthermore, the model generation unit 370 uses a value associated with whether the combustion status is "poor drying" as the output sample. The model generation unit 370 uses the dataset with the brightness value as the input sample and the value representing the combustion status as the output sample, and uses the CNN (Convolutional Neural Network) method to learn the learned model. The learned model is a relationship equation that associates the brightness value, the combustion status value, and weights.

[0097] The model storage unit 380 stores the learned model generated by the model generation unit 370. Examples of the model storage unit 380 include local storage and cloud storage.

[0098] Similar to the state determination unit 350 in the first embodiment, the state determination unit 350 in the second embodiment determines the combustion state as "stable combustion," "uneven combustion," "early combustion," "feeder combustion," "poor drying," "poor burnout," and "poor visibility." Among the above combustion states, the state determination unit 350 determines the combustion state in the same manner as the state determination unit 350 in the first embodiment, except for "poor drying." With respect to "poor drying," the state determination unit 350 in the second embodiment inputs the brightness determined by the brightness determination unit 320 into the learned model stored in the model storage unit 380 to determine whether the combustion state of the drying section 21 is "poor drying."

[0099] When the model generation unit 370 generates a learned model, camera 220 needs to be an infrared camera. After the learned model is generated, when the state determination unit 350 determines the combustion state, camera 220 does not need to be an infrared camera; the combustion state of the drying section 21 can be determined based on the brightness processed image captured by the visible camera.

[0100] Effect

[0101] The state determination device 300 of the combustion equipment 100 involved in the present invention includes a model storage unit 380, which stores a learned model learned through supervised learning using a data set, wherein the data set is composed of input samples including brightness of an image associated with the drying section 21 and output samples including the combustion state of the drying section 21. The state determination unit 350 inputs the brightness into the learned model to determine the combustion state of the drying section 21.

[0102] Since the state determination device 300 stores the learned model corresponding to the combustion state, the user of the state determination device 300 can understand the combustion state of the drying section 21 based on the learned model.

[0103] <Other Implementation Methods>

[0104] An embodiment has been described in detail above with reference to the accompanying drawings. However, the specific structure is not limited to the above structure, and various design changes can be made.

[0105] In the above embodiment, the state determination unit 350 identifies "feeder combustion" as the combustion state based on the flame fluoroscopic image captured by the camera 220. However, this determination can also be based on a visual image. In this case, the state determination unit 350 receives the visual image, in which the brightness determination unit 320 has determined the bright and dark grids. If the proportion of bright grids in the area capturing the center of the flame F is below a middle threshold (e.g., 70%), or if the proportion of bright grids in the area capturing the upper portion of the flame F is above an upper threshold (e.g., 50%), the state determination unit 350 determines that the combustion state is "feeder combustion." The feeder 31 is located farther from the flame F than the camera 220. However, if combustion occurs in the feeder 31, the brightness increases due to the combustion, and the brightness of the center or upper portion of the flame F corresponding to the position of the feeder 31 increases.

[0106] Figure 5 This is a schematic block diagram showing the structure of a computer according to at least one embodiment.

[0107] The computer 1100 includes a processor 1110 , a main memory 1120 , a storage 1130 , and an interface 1140 .

[0108] The state determination device 300 is installed in the computer 1100. Furthermore, the operations of each of the aforementioned processing units are stored in the form of a program in the memory 1130. The processor 1110 reads the program from the memory 1130, expands it into the main memory 1120, and executes the aforementioned processing according to the program. Furthermore, the processor 1110 reserves storage areas corresponding to the aforementioned storage units in the main memory 1120 according to the program.

[0109] The program can be used to implement a portion of the functions performed by the computer 1100. For example, the program can be used in combination with other programs stored in the memory 1130, or in combination with other programs installed in other devices. In addition, in other embodiments, the computer 1100 may include a customized LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device) in addition to or instead of the above structure. Examples of PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), and FPGA (Field Programmable Gate Array). In this case, part or all of the functions implemented by the processor 1110 can be implemented by the integrated circuit.

[0110] Examples of memory 1130 include magnetic disks, magneto-optical disks, and semiconductor memories. Memory 1130 can be an internal medium directly connected to a bus of computer 1100, or an external medium connected to the computer via interface 1140 or a communication line. Furthermore, if the program is distributed to computer 1100 via a communication line, the distributed computer 1100 can expand the program into main memory 1120 and execute the aforementioned processing. In at least one embodiment, memory 1130 is a non-transitory, tangible storage medium.

[0111] Furthermore, the program may be used to implement a portion of the aforementioned functions. In addition, the program may be a so-called differential file (differential program) that implements the aforementioned functions by combining the program with other programs already stored in the memory 1130 .

[0112] <Note>

[0113] The state identification device 300 of the combustion equipment 100 described in each embodiment can be understood as follows, for example.

[0114] (1) The state determination device 300 of the combustion device 100 involved in the present invention determines the combustion state of the combustion device 100, and the combustion device 100 includes: a furnace body 10, which defines a processing space V; a grate 61, which transports the incineration material 400 along the conveying direction Da in the processing space V; and a feeder 31, which supplies the incineration material 400 to the processing space V, and the processing space V is divided into a plurality of sections in the conveying direction Da. In the state determination device 300, there are: an image acquisition unit 310, which acquires an image of the feeder 31 and the sections, that is, a processed image; and a state determination unit 350, which determines the combustion state of the feeder 31 and the sections based on the processed image.

[0115] The user of the state determination device 300 can grasp the combustion state in the feeder 31 and the section of the combustion equipment 100 .

[0116] (2) Furthermore, the image acquisition unit 310 of the state identification device 300 of the combustion equipment 100 acquires the processed images captured by the visible camera and the infrared camera.

[0117] Since the state determination device 300 acquires processed images captured by the visible camera and the infrared camera, it can acquire processed images even in areas obscured by the flame F or the like present in the processing space V. Thus, the user of the state determination device 300 can understand the combustion state in areas obscured by the flame F or the like in the feeder 31 and the drying section 21 of the combustion equipment 100.

[0118] (3) Furthermore, the state determination device 300 is divided into a drying section 21, a combustion section 22, and a post-combustion section 23 from the upstream of the conveying direction Da. The processed image is an image of the feeder 31, the drying section 21, the combustion section 22, and the post-combustion section 23. The state determination unit 350 determines the combustion state of each of the feeder 31, the drying section 21, the combustion section 22, and the post-combustion section 23.

[0119] The user of the state determination device 300 can grasp the combustion states in the feeder 31 , the drying section 21 , the combustion section 22 , and the post-combustion section 23 of the combustion equipment 100 .

[0120] (4) Furthermore, the brightness determination unit 320 determines the brightness of images associated with the feeder 31 , the drying section 21 , the combustion section 22 , and the post-combustion section 23 based on the processed image, and the state determination unit 350 determines the combustion state based on the brightness.

[0121] Since the state identifying device 300 identifies the brightness of the processed image, the user of the state identifying device 300 can understand the position of the flame F and can also understand the combustion state of the incineration object 400 based on the brightness.

[0122] (5) Furthermore, the state determination device 300 includes: a point determination unit 330 for determining the end of the flame F caused by the combustion of the incineration object 400 in the conveying direction, that is, the burnout point Z, based on the brightness; a temperature determination unit 340 for determining the temperature of the post-combustion section 23 based on the processed image; and a recommendation unit 360 for recommending a recommended operation of the combustion equipment 100 based on the determined combustion state, burnout point Z, and temperature.

[0123] Thus, the user of the state determination device 300 can receive advice on recommended operations associated with the combustion state determined by the state determination device 300 and can operate the combustion appliance 100 more easily.

[0124] (6) Furthermore, the combustion equipment 100 includes the wind box 2 that supplies air from below the grate 61 , and the recommended operation of the state determination device 300 is an operation related to the speed of the grate 61 or the amount of air supplied from the wind box 2 .

[0125] Thus, the user of the state determination device 300 can receive advice on operations related to the speed of the grate 61 or the amount of air supplied from the wind box 2 determined by the state determination device 300, that is, recommended operations, and can operate the combustion equipment 100 more simply.

[0126] (7) Furthermore, the combustion state of the state determining device 300 indicates any one of stable combustion, uneven combustion, early combustion, feeder combustion, poor drying, poor burnout, and poor boundary conditions.

[0127] The state identifying device 300 identifies the combustion state, which indicates any of stable combustion, uneven combustion, premature combustion, feeder combustion, poor drying, poor burnout, and poor boundary conditions.

[0128] (8) The state determination device 300 of the combustion equipment 100 involved in the present invention is equipped with a model storage unit 380, which stores a learned model learned by supervised learning using a data set, wherein the data set is composed of input samples including brightness of an image associated with the drying section 21 and output samples including the combustion state of the drying section 21. The state determination unit 350 inputs the brightness into the learned model to determine the combustion state of the drying section 21.

[0129] Since the state determination device 300 stores the learned model corresponding to the combustion state, the user of the state determination device 300 can understand the combustion state of the drying section 21 based on the learned model.

[0130] (9) The state determination method involved in the present invention determines the combustion state of a combustion device 100, and the combustion device 100 comprises: a furnace body 10, which defines a processing space V; a grate 61, which transports the incineration material 400 along the conveying direction Da in the processing space V; and a feeder 31, which supplies the incineration material 400 to the processing space V, and the processing space V is divided into a plurality of sections in the conveying direction Da. The state determination device 300 has the following steps: obtaining an image of the feeder 31 and the sections, i.e., a processed image; and determining the combustion state of each of the feeder 31 and the sections based on the processed image.

[0131] The user of the state determination method can grasp the combustion state in the feeder 31 and the section of the combustion equipment 100 .

[0132] (10) The program involved in the present invention is a program of a state determination device for determining the combustion state of a combustion device 100, wherein the combustion device 100 comprises: a furnace body 10, which defines a processing space V; a grate 61, which transports the incineration material 400 along the conveying direction Da in the processing space V; and a feeder 31, which supplies the incineration material 400 to the processing space V, wherein the processing space V is divided into a plurality of sections in the conveying direction Da. The program causes a computer to execute the following steps: obtaining an image of the feeder and the sections, i.e., a processed image; and determining the combustion state of each of the feeder and the sections based on the processed image.

[0133] The user of the program can grasp the combustion status in the feeder 31 and the sections of the combustion equipment 100 .

[0134] Industrial applicability

[0135] According to the combustion device state determination device, state determination method, and program of the present invention, it is possible to grasp the combustion state in the feeder and the section of the combustion equipment.

[0136] Explanation of symbols

[0137] 1-Stove, 2-Windbox, 3-Hopper, 4-Gas circulation unit, 6-Stove, 7-Furnace, 8-Waste heat recovery boiler, 9-Cooling tower, 10-Furnace body, 11-Dust collection device, 12-Chimney, 13-Discharge chute, 21-Drying section, 22-Combustion section, 23-Post-combustion section, 31-Feeder, 61-Grate, 61A-Fixed grate, 61B-Movable grate, 100-Combustion equipment, 300-State determination device, 400-Incineration material, 1100-Computer, 1110-Processor, 1120-Main memory, 1130-Storage, 1140-Interface, L1-Primary air pipeline, L2-Secondary air pipeline, B1-Blower, F-Flame, Z-Burnout point.

Claims

1. A state determination device for a combustion device, for determining the combustion state of the combustion device, wherein the combustion device comprises: a furnace body defining a processing space; a grate for conveying incineration material in a conveying direction within the processing space; and a feeder for supplying the incineration material to the processing space, wherein the processing space is divided into a plurality of sections in the conveying direction. The state determination device for the combustion device comprises: an image acquisition unit for acquiring an image of the feeder and the plurality of sections, that is, a processed image; and a state determination unit that determines the combustion state of the feeder and each of the plurality of sections based on the processed image; The image acquisition unit acquires the processed image captured by the visible camera and the infrared camera, The multiple sections are divided into a drying section, a combustion section and a post-combustion section from the upstream of the conveying direction. The processed image captured by the infrared camera is an image of the feeder and the drying section. The processed image captured by the visual camera is an image of the combustion section and the post-combustion section. The state determination unit determines a combustion state of each of the feeder, the drying section, the combustion section, and the post-combustion section.

2. The state determination device of the combustion equipment according to claim 1, wherein: The apparatus further comprises a brightness determination unit configured to determine the brightness of images respectively associated with the feeder, the drying section, the combustion section, and the post-combustion section based on the processed image. The state determination unit determines the combustion state based on the brightness.

3. The combustion equipment state determination device according to claim 2, further comprising: a model storage unit that stores a learned model learned by supervised learning using a data set, the data set consisting of an input sample including the brightness of the drying section and an output sample including the combustion state of the drying section, The state determination section inputs the brightness into the learned model to determine the combustion state of the drying section.

4. The combustion equipment state determination device according to claim 2 or 3, further comprising: a point determination unit that determines, based on the brightness, a burnout point that is a rear end of the flame caused by the combustion of the incineration object in the conveying direction; a temperature determining unit, which determines the temperature of the post-combustion section based on the processed image; and The recommendation unit recommends a recommended operation of the combustion device according to the determined combustion state, the burnout point, and the temperature.

5. The state determination device of the combustion equipment according to claim 4, wherein: The combustion equipment includes a wind box for supplying air from below the grate. The recommended operation is an operation related to the speed of the grate or the amount of air supplied from the wind box.

6. The state determination device of a combustion device according to claim 1 or 2, wherein: The combustion state is any one of stable combustion, uneven combustion, early combustion, feeder combustion, poor drying, poor burnout, and poor boundary conditions.

7. A state determination method, comprising determining a combustion state of a combustion device in a state determination device, wherein the combustion device comprises: a furnace body defining a processing space; a grate for conveying an incineration material in a conveying direction within the processing space; and a feeder for supplying the incineration material to the processing space, wherein the processing space is divided into a plurality of sections in the conveying direction. The multiple sections are divided into a drying section, a combustion section and a post-combustion section from the upstream of the conveying direction. The state determination method comprises the following steps: Acquiring processed images captured by an infrared camera that captures the feeder and the drying section and processed images captured by a visual camera that captures the combustion section and the post-combustion section; and The combustion status of the feeder and each of the plurality of sections is determined based on the processed image.

8. A program product comprising a program for causing a computer of a state determination device for determining a combustion state of a combustion device to execute the following steps, wherein the combustion device comprises: a furnace body defining a processing space; a grate for conveying an incineration material in a conveying direction within the processing space; and a feeder for supplying the incineration material to the processing space, wherein the processing space is divided into a drying section, a combustion section, and a post-combustion section from an upstream side in the conveying direction, wherein the steps are: Acquiring processed images captured by an infrared camera that captures the feeder and the drying section and processed images captured by a visual camera that captures the combustion section and the post-combustion section; and The combustion states of the feeder, the drying section, the combustion section, and the post-combustion section are determined based on the processed image.

Images