JP5281315B2 - Slag solidification determination device, slag solidification determination program, and slag solidification determination method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a slag solidification determining device, a slag solidification determining program and its method capable of automatically determining a proper ignition time period of a melting burner without affected by flame and combustion light jetted from the inside of a furnace. <P>SOLUTION: A region dividing section 122 divides an image of a slag hole continuously picked up in time-series, into a plurality of blocks by every image. A region average calculating section 123 calculates average lightness of the block by every block divided by the region dividing section 122. Further a moving average calculating section 124 calculates moving average of the average lightness calculated by the region average calculating section 123. A slag solidification determining section 125 counts the number of regions in which the moving average calculated by the moving average calculating section 124 is lowered by more than a prescribed value in comparison with an initial value, as an index value by every image, and determines the solidification of the slag by the amount causing incomplete discharge, when the counted index value is over a prescribed threshold value. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a slag solidification determination device, a slag solidification determination program, and a slag solidification determination method for determining solidification of slag discharged from a melting furnace, in particular, without being affected by flames or combustion light ejected from the furnace, The present invention relates to a slag solidification determination device, a slag solidification determination program, and a slag solidification determination method that can automatically determine an appropriate ignition timing of a molten burner.

  Conventionally, in operation of a melting furnace such as a coal gasification furnace or a waste melting furnace, coal ash and waste are discharged out of the furnace as slag. In such a melting furnace, when the slag is solidified and the discharge becomes incomplete, the operator who is monitored for 24 hours ignites the melting burner and melts and removes the solidified portion. However, since the ignition of the melting burner lowers the operating efficiency of the melting furnace, it is necessary to automatically determine an appropriate ignition timing that does not depend on the individual's subjectivity for economical operation or reducing the burden on the operator. Has been.

  In general, it is known that when slag is solidified, the brightness decreases due to a temperature decrease of the slag itself. Therefore, for example, when shooting the discharge port through which the slag is discharged with a camera, the change in the area of the high-luminance portion in the photographed image and the change in the average luminance of the intermediate luminance portion excluding the high-luminance portion and the low-luminance portion Based on this, a technique for automatically determining solidification of slag at the discharge port has been proposed (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 9-243337

  However, in the conventional technology described above, solidification of slag may not be properly determined due to the influence of flames or combustion light ejected from the furnace.

  Specifically, during operation of the melting furnace, flames are intermittently ejected from the discharge port, but this flame causes an event that the image suddenly becomes bright. Further, the brightness of the slag in the photographed image is not determined only by the brightness of the slag itself, but includes the brightness of the combustion light illuminated from the outlet. However, the degree to which the combustion light strikes (illumination conditions) varies from place to place in the image due to the influence of the shape of the outlet. Due to these influences, changes in the area of the high-luminance portion and the average luminance of the medium-luminance portion in the captured image become unstable, and as a result, solidification of the slag may not be properly determined.

  The present invention has been made to solve the above-described problems caused by the prior art, and automatically determines an appropriate ignition timing of the melting burner without being affected by flames or combustion light ejected from the furnace. An object of the present invention is to provide a slag solidification determination device, a slag solidification determination program, and a slag solidification determination method.

  In order to solve the above-described problems and achieve the object, the present invention is a slag solidification determination device that determines solidification of slag discharged from a melting furnace, and is configured to discharge the slag continuously photographed over time. Area division means for dividing the image of the exit into a plurality of areas for each image, area average calculation means for calculating the average brightness of the area for each area divided by the area division means, and calculation by the area average calculation means The moving average calculating means for calculating the moving average of the average brightness for each area, and the number of areas where the moving average calculated by the moving average calculating means is lower than the initial value by a predetermined value or more. Slag solidification determining means for counting each image as an index value and determining that the amount of slag that may cause discharge failure has solidified when the counted index value exceeds a predetermined threshold value. The features.

  Further, the present invention is a slag solidification determination program for determining solidification of slag discharged from a melting furnace, wherein images of the slag discharge port continuously photographed over time are divided into a plurality of areas for each image. An area dividing procedure for dividing, an area average calculating procedure for calculating the average brightness of the area for each area divided by the area dividing procedure, and a moving average of the average brightness calculated by the area average calculating procedure for each area The moving average calculation procedure to be calculated in step (b) and the number of areas where the moving average calculated by the moving average calculation procedure is lower than the initial value by a predetermined value or more are counted as index values for each image, and counted. When the index value exceeds a predetermined threshold, the computer executes a slag solidification determination procedure for determining that an amount of slag that may cause discharge failure has solidified. .

  The present invention is also a slag solidification determination method applied to a melting furnace system that discharges slag, wherein the image of the slag discharge port that is continuously photographed over time is divided into a plurality of regions for each image. A region dividing step, a region average calculating step for calculating an average brightness of the region for each region divided by the region dividing step, and a moving average of the average brightness calculated by the region average calculating step for each region. The moving average calculation step to be calculated, and the number of areas where the moving average calculated by the moving average calculation step is lower than the initial value by a predetermined value or more are counted as index values for each image, and the counted index And a slag solidification determining step of determining that an amount of slag capable of causing discharge failure has solidified when the value exceeds a predetermined threshold value.

  According to the present invention, there is an effect that it is possible to automatically determine an appropriate ignition timing of the melting burner without being affected by flames or combustion light ejected from the furnace.

  Exemplary embodiments of a slag solidification determination device, a slag solidification determination program, and a slag solidification determination method according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, a present Example demonstrates centering on the case where this invention is applied to a coal gasifier.

  First, the outline | summary of the coal gasifier which concerns on a present Example is demonstrated. FIG. 1 is a diagram for explaining an outline of a coal gasifier according to the present embodiment. The figure shows an example of a coal gasification furnace used in an integrated coal gasification combined cycle (IGCC) or the like. As shown in the figure, the coal gasification furnace 10 includes a pressure vessel 11, two furnaces provided in the pressure vessel 11, a reductor 12 and a combustor 13.

  Here, the combustion heat generated in the combustor 13 is used as a heat source for melting the ash content in the coal and for the gasification endothermic reaction in the reductor 12. Further, the ash particles melted by the combustion heat generated in the combustor 13 become molten slag, flow down the wall surface of the combustor 13, and are discharged from a slag hole (discharge port) 14 provided on the bottom surface of the combustor 13.

  In the present embodiment, in the coal gasification furnace 10, a slag observation window for observing the flow of slag discharged from the slag hole 14 is provided in the lower part of the pressure vessel 11, and based on an image taken from the slag observation window. Thus, the slag solidification determining device determines the solidification of the slag.

  FIG. 2 is a diagram illustrating a slag observation window provided in the coal gasification furnace 10 according to the present embodiment. As shown in the figure, an observation window base 20 having a cylindrical slag observation window 21 on the inner side and a CCD (Charge Coupled) for photographing the flow of slag through the slag observation window 21 are provided at the lower part of the pressure vessel 11. Device) camera 30 is provided. The CCD camera 30 is connected to the slag solidification determining device 100 according to this embodiment.

  Here, the observation window base 20 is installed such that the cylindrical slag observation window 21 is directed at a predetermined angle with respect to the slag hole 14. As a result, the CCD camera 30 can shoot through the slag observation window 21 so as to look up the slag hole 14 from obliquely below.

  FIG. 3 is a diagram showing an image photographed by the CCD camera 30. As shown in the figure, the CCD camera 30 continuously captures the slag discharged from the slag hole 14 with time through the slag observation window 21. Specifically, the CCD camera 30 captures images of a slag flowing on the front side of the slag hole 14 (left slag shown in the figure) and a slag flowing on the back side (right slag shown in the figure).

  Next, the configuration of the slag solidification determining apparatus 100 according to the present embodiment will be described. FIG. 4 is a functional block diagram illustrating the configuration of the slag solidification determining apparatus according to the present embodiment. As shown in the figure, the slag solidification determining apparatus 100 includes a storage unit 110 and a control unit 120.

  The storage unit 110 stores various information and various programs. In particular, the storage unit includes an image data storage unit 111 as a conceptual function unit. The image data storage unit 111 stores an image taken by the CCD camera 30.

  The control unit 120 has an internal memory for storing a control program such as an OS (Operating System), a program that defines various processing procedures, and necessary data, and executes various processes using these. In particular, the control unit 120 includes an image acquisition unit 121, a region division unit 122, a region average calculation unit 123, a moving average calculation unit 124, a slag solidification determination unit 125, and an alarm output as conceptual function units. Part 126.

  The image acquisition unit 121 acquires image data relating to images of the slag hole 14 that are continuously photographed by the CCD camera 30 over time, and stores the acquired image data in the image data storage unit 111.

  The area dividing unit 122 divides the image of the slag hole 14 continuously photographed with time into a plurality of areas for each image. Specifically, the area dividing unit 122 sequentially reads out the image data acquired by the image acquiring unit 121 from the image data storage unit 111, and divides the read image into a plurality of blocks arranged in a grid pattern.

  The area average calculation unit 123 calculates the average brightness of each block divided by the area division unit 122. Specifically, the area average calculation unit 123 calculates the average brightness of each pixel included in each block for each of the plurality of blocks divided by the area division unit 122.

  Here, the region average calculation unit 123 calculates the average brightness for each of the divided blocks, so that even if the illumination condition of the combustion light varies from place to place, the brightness change for each place. Can be detected.

  The moving average calculator 124 calculates the moving average of the average brightness calculated by the area average calculator 123 for each block. Specifically, the moving average calculation unit 124 calculates a moving average of the plurality of blocks divided by the region dividing unit 122 within a predetermined time nearest to the average brightness calculated by the region average calculating unit 123. .

  Here, the moving average calculating unit 124 calculates the moving average of the average brightness for each block, so that the average brightness is smoothed in the time direction. Variations in brightness in frame units (frames) can be removed. Thereby, even when flames are intermittently ejected from the discharge port, sudden changes in lightness due to the flames can be absorbed.

  The slag solidification determining unit 125 counts (counts) the number of blocks in which the moving average calculated by the moving average calculating unit 124 is lower than the initial value by a predetermined value or more as an index value for each image. When the index value exceeds a predetermined threshold value, it is determined that an amount of slag that can cause discharge failure has solidified.

  FIG. 5 is a diagram for explaining determination of slag solidification by the slag solidification determination unit 125. The figure shows an example of an image divided into a plurality of blocks. As shown in the figure, in the image taken through the slag observation window 21, the solidified slag portion becomes darker than the other portions. Therefore, the average brightness of the block including the solidified slag portion is lower than that of the other blocks. As the amount of solidified slag increases as time passes, the number of blocks whose average lightness has decreased increases.

  Therefore, the slag solidification determining unit 125 calculates the moving average of the average brightness of each block by the moving average calculating unit 124, and then the block whose moving average is lower than the initial value by a predetermined value or more (FIG. 5). Are counted as index values for determining the solidification of the slag. Then, the slag solidification determination unit 125 determines whether or not the counted index value exceeds a predetermined threshold value. If the index value exceeds the predetermined value, the slag solidification determination unit 125 determines that the amount of slag that may cause discharge failure has solidified.

  Note that each time the slag solidification determination unit 125 counts the above-described index value, the slag solidification determination unit 125 newly counts the number of blocks in which the moving average lightness is lower than the initial value by a predetermined value or more. . Specifically, each time the moving average calculating unit 124 calculates the moving average of the average brightness of each block for each image, the slag solidification determining unit 125 invalidates the index value counted immediately before and newly calculates it. Based on the moving average, the number of blocks serving as index values is counted.

  As a result, even if there is a block in which the moving average of the average brightness has temporarily increased due to the influence of flames ejected from the discharge port, etc., if the moving average decreases when the index value is counted next time, Blocks are excluded from index value counting. Therefore, even when the lightness fluctuates in an unstable manner for each place where the slag flows, the solidification of the slag can be determined dynamically according to the fluctuation.

  The alarm output unit 126 outputs an alarm for prompting the driver to ignite the molten burner when the slag solidification determination unit 125 determines that an amount of slag that may cause discharge failure has solidified. For example, the alarm output unit 126 outputs a warning sound such as a buzzer as an alarm for prompting the ignition of the melting burner, or outputs a warning message to a display device (not shown).

  Next, a processing procedure of the slag solidification determining apparatus according to the present embodiment will be described. FIG. 6 is a flowchart illustrating a processing procedure of the slag solidification determining apparatus according to the present embodiment. As shown in the figure, in the slag solidification determining apparatus 100, during operation of the coal gasification furnace 10, the CCD camera 30 takes an image of the slag hole 14 (step S101).

  Then, the image acquisition unit 121 acquires image data relating to the images of the slag holes 14 that are continuously photographed with time by the CCD camera 30, and stores the acquired image data in the image data storage unit 111 (step S102). .

  Subsequently, the area dividing unit 122 sequentially reads out the image data acquired by the image acquiring unit 121 from the image data storage unit 111, and divides the read image into a plurality of blocks arranged in a grid pattern (step S103). . Further, the area average calculation unit 123 calculates the average brightness of the area for each block divided by the area division unit 122 (step S104).

  Subsequently, the moving average calculation unit 124 calculates the moving average of the average brightness calculated by the region average calculation unit 123 for each block (step S105). Further, the slag solidification determining unit 125 counts the number of blocks in which the moving average calculated by the moving average calculating unit 124 is lower than the initial value by a predetermined value or more as an index value for each image (step S106).

  When the index value counted by the slag solidification determination unit 125 exceeds a predetermined threshold (Yes at Step S107), the alarm output unit 126 issues an alarm for prompting the driver to ignite the melting burner. Output (step S108).

  As described above, in the present embodiment, the region dividing unit 122 divides the image of the slag hole 14 that is continuously captured over time into a plurality of blocks for each image. In addition, the area average calculation unit 123 calculates the average brightness of each block divided by the area division unit 122. In addition, the moving average calculation unit 124 calculates the moving average of the average brightness calculated by the region average calculation unit 123 for each block. Then, the slag solidification determining unit 125 counts the number of areas in which the moving average calculated by the moving average calculating unit 124 is lower than the initial value as an index value for each image, and the counted index When the value exceeds a predetermined threshold, it is determined that an amount of slag that may cause discharge failure has solidified.

  According to such a configuration, the average brightness and the moving average are calculated for each of the divided blocks. Therefore, even when the illumination condition of the combustion light varies from place to place in the vicinity of the slag hole 14, it is determined for each place. A change in brightness can be detected. In addition, since the moving average of the average brightness is calculated for each block, the average brightness is smoothed in the time direction. As a result, fluctuations in image brightness in frame units due to the influence of flames intermittently ejected from the discharge port are eliminated. That is, by smoothing the average brightness in the time direction, sudden changes in brightness due to the flame are absorbed even when the flame is intermittently ejected from the discharge port.

  Therefore, according to the present embodiment, it is possible to automatically determine an appropriate ignition timing of the melting burner without being affected by the flame or combustion light ejected from the furnace.

  In this embodiment, the slag solidification determining unit 125 newly counts the index value every time the index value is counted. However, the present invention is not limited to this. For example, when the slag solidification determining unit 125 counts the index value, a block that has been counted even once in the past (hereinafter referred to as “counted block”). Of the remaining blocks, count the number of areas where the moving average has fallen by a predetermined value or more from the initial value, and use the sum of the number of counted blocks and the number of counted blocks as the index value. May be.

  In this case, for example, each time the index value is counted, the slag solidification determining unit 125 stores information regarding the counted block, that is, the counted block in an internal memory or the like. When the index value is newly counted, the slag solidification determination unit 125 has the moving average of the remaining blocks excluding the stored counted blocks decreased by a predetermined value or more from the initial value. Count the number of blocks. Thereafter, the slag solidification determining unit 125 calculates the sum of the counted number of blocks and the number of stored counted blocks, and uses the calculated total as an index value for determining solidification of the slag.

  As a result, the block once targeted for index value counting is excluded from the subsequent index value counting, so it is determined whether the moving average has decreased by a predetermined value or more compared to the initial value. The number of blocks to be determined is reduced, and the processing load relating to index value counting can be reduced.

  In this embodiment, when the alarm output unit 126 determines that the slag solidification determination unit 125 determines that an amount of slag that can cause discharge failure has solidified, the alarm output unit 126 issues an alarm for prompting the driver to ignite the molten burner. I decided to output it. However, the present invention is not limited to this. For example, the ignition of the molten burner may be controlled based on the determination result of the slag solidification determination unit 125.

  In this case, for example, an ignition control means for controlling the ignition of the melting burner is provided in the coal gasification furnace 10. And when it determines with the slag solidification determination part 125 having solidified the quantity of slag which can cause discharge failure, it transmits the control signal which instruct | indicates to ignite a melting burner to an ignition control means. Furthermore, for example, after transmitting a control signal instructing ignition, the slag solidification determining unit 125, when the number of blocks in which the moving average has decreased by a predetermined value or more compared to the initial value becomes zero, A control signal instructing to digest the melting burner may be transmitted to the ignition control means.

  In this way, by controlling the ignition of the melting burner based on the determination result of the slag solidification determining unit 125, the melting burner is automatically ignited or digested as necessary, so the driver regarding melting of the solidified slag Can be reduced.

  The slag solidification determination according to the present embodiment has been described above based on the configuration and processing procedure of the slag solidification determination device 100 according to the present embodiment. Furthermore, here, in order to show the effectiveness of the slag solidification determination index in the present embodiment, the results of comparing and evaluating the index in the present embodiment and the index in the conventional method based on the experimental results are shown. Here, the area of the high luminance part and the average luminance of the intermediate luminance part are used as indices in the conventional method.

  First, an index evaluation method in this comparative evaluation will be described. In the experiment conducted for the comparative evaluation, the index in this example and the index in the conventional method were calculated for 54 video files in which one file is from the normal operation state to immediately before the ignition of the melting burner. Each video file used in the experiment has an image size of 720 × 480 pixels, a frame number (the number of images) of 30 frames / second, and a color number of 8 bits (0 to 255) for each RGB color. Here, in any video file, there is no solidified slag near the slag hole at the start of the video. Moreover, the video end time is just before the melting burner is ignited, and is in a state where the solidification of the slag has progressed so as to adversely affect the operation of the coal gasifier.

  Therefore, in this comparative evaluation, the index value at the start of the video is compared with the index value at the end of the video, and if there is a difference between the index values, the index value is effective for identifying the presence or absence of slag solidification. to decide. On the other hand, if there is no difference between the index values or the signs of the index value differences in all the videos do not match, it is determined to be invalid.

  Next, a conventional index taken up as a comparison index in this comparative evaluation will be described. The first index value is the area of the high luminance part. This index uses the area of the area with high brightness in the photographed image as the index value, and is expressed by combining the area of the combustion part that is blocked by the solidified slag and the area of the flowing slag. Therefore, the solidified state of the slag can be expressed indirectly. Hereinafter, this index is referred to as an “area index”.

  The second index value is the average luminance of the intermediate luminance portion. This index expresses a rough solidified state of slag by evaluating the change in brightness over the entire slag observation window. Hereinafter, this index is referred to as “average brightness”.

  Next, specific setting conditions for each index value in an experiment performed for comparative evaluation will be described. In the setting conditions shown below, the lightness takes a value from 0 to 255.

First, the setting conditions regarding the index in the present embodiment are as follows.
(1) The image is divided into 20 × 20 pixel blocks (36 horizontal × 24 vertical), and the average brightness is calculated.
(2) The moving average of the average brightness of 300 frames (for 10 seconds) is calculated for each block.
(3) In each block, the area where the moving average value is reduced by 30% from the initial value is the slag solidified area, and the number of blocks in the slag solidified area is the index value.
(4) Based on the value of each image, an area having a brightness of 50 or less is set as an area outside the slag observation window.
(5) Although the index in the present embodiment is an increase function, the other index is a decrease function.
Here, the total number of blocks in the slag observation window is the initial value, and the value obtained by subtracting the index value from the initial value is the new index value.

The setting conditions of the area index are as follows.
(1) All images are visually confirmed, and a region having a brightness of 240 or more is defined as a bright region.
(2) A moving average of 300 frames (10 seconds) is calculated.

The setting conditions for the average brightness are as follows.
(1) Based on the value of each image, an area having a brightness of 50 or less is set as an area outside the slag observation window.
(2) A moving average of 300 frames (10 seconds) is calculated.

  Next, an example of each index calculated in the experiment will be described. FIG. 7 is a diagram illustrating an example of a time-series change of each index. The graph shown in the figure shows the result of calculating the index in the present example and the conventional index for one of the 54 video files used in this experiment.

  Specifically, (a) of the figure shows the time series change of the index (the number of unchanged blocks) in this embodiment from the video start time to the video end time. Moreover, (b) of the figure shows the time series change of the area index (area (pixel)) from the video start time to the video end time. Moreover, (c) of the figure shows the time series change of the average brightness (brightness average) from the video start time to the video end time. As shown in the figure, it can be seen that the index value decreases from the start point to the end point for any of the indicators.

  Next, the result of comparing and evaluating the indicators based on the above-described evaluation method will be described. FIG. 8 is a diagram showing the results of comparative evaluation of indices. The graph shown in the figure calculates the index value difference between the video start time and video end time for the 54 video files that were the subject of the experiment, and the files are calculated in order from the smallest to largest. The arranged results are shown. In the figure, the difference between the index values between the video start time and the video end time set on the vertical axis is a value obtained by normalizing the calculated difference with the maximum value for each index value.

  As shown in the figure, for the index in this embodiment, the difference in index values between the video start time and the video end time is positive in all video files, but the conventional index (area index, average brightness) Is a mix of video files that have both positive and negative differences.

  Here, a video file having a negative difference indicates that the relationship between the initial value and the end value is opposite to that in the video file. In this way, there are twelve video files having a negative difference when the index is an area index and two video files when the index is an average brightness. With respect to these video files, determination regarding solidification of slag cannot be performed at all.

  Further, in the graph of the same figure, when the portions where the difference is positive are compared, the difference between the initial value and the end value is larger for the index in the present embodiment than for the area index and the average brightness. Therefore, in the index in the present embodiment, it is possible to easily set a threshold for determining whether or not the slag is solidified.

  As described above, the index in the present embodiment has a larger initial value and end value than the index in the conventional method, and furthermore, the signs of the index value differences in all the videos match, so that the slag can be solidified. It can be determined that the effectiveness as a determination index for determination is high.

  In addition, the smoothing effect is acquired, so that the predetermined time at the time of calculating the moving average of average brightness is set long. However, if the predetermined time is set long, the time from when the slag solidifies to when the alarm is issued is increased by the length of the predetermined time. Therefore, the predetermined time for calculating the moving average of the average brightness is set to an optimum value in consideration of the solidification speed of the slag and the false alarm.

  Moreover, if the block size when dividing an image into a plurality of blocks is too small, the case where fine noise is recognized as solidified slag increases, and if it is too large, the case where solidified slag cannot be captured increases. Further, if the block size is reduced, the number of blocks increases, and it takes time to calculate the moving average. Therefore, an optimal value is set as the block size when the image is divided into a plurality of blocks according to the required determination accuracy and the processing performance of the apparatus.

  In addition, when the block is counted as the index value, if the threshold value of the brightness decrease with respect to the initial value for determining whether or not to count is set to a low value, it is considered that the slag has solidified even if a slight change is set. In other words, if it is set high, it will not be determined that the slag has solidified even if the brightness changes greatly. Therefore, it is necessary to set an appropriate value based on the actual measurement result or the like so that the lightness reduction threshold with respect to the initial value matches the actual solidified state of the slag.

  In addition, although the present Example demonstrated the case where this invention was applied to a coal gasification furnace, this invention is not limited to this, It applies similarly to other melting furnaces, such as a waste melting furnace. can do.

  As described above, the slag solidification determination device, the slag solidification determination program, and the slag solidification determination method according to the present invention are useful for melting furnaces such as coal gasification furnaces and waste melting furnaces, and in particular, are ejected from the inside of the furnace. This method is suitable when it is required to automatically determine an appropriate ignition timing of the melting burner without being affected by an image due to flame or combustion light.

It is a figure for demonstrating the outline | summary of the coal gasification furnace which concerns on a present Example. It is a figure which shows the slag observation window provided in the coal gasification furnace which concerns on a present Example. It is a figure which shows the image image | photographed with a CCD camera. It is a functional block diagram which shows the structure of the slag solidification determination apparatus which concerns on a present Example. It is a figure for demonstrating determination of the slag solidification by a slag solidification determination part. It is a flowchart which shows the process sequence of the slag solidification determination apparatus which concerns on a present Example. It is a figure which shows an example of the time series change of each parameter | index. It is a figure which shows the comparative evaluation result of a parameter | index.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Coal gasifier 11 Pressure vessel 12 Reductor 13 Combustor 14 Slag hall 20 Observation window base 21 Slag observation window 30 Camera 100 Slag solidification determination apparatus 110 Storage part 111 Image data storage part 120 Control part 121 Image acquisition part 122 Area division part 123 Region average calculation unit 124 Moving average calculation unit 125 Slag solidification determination unit 126 Alarm output unit

Claims (5)

A slag solidification determination device for determining solidification of slag discharged from a melting furnace,
Area dividing means for dividing the image of the outlet of the slag taken continuously over time into a plurality of areas for each image;
Area average calculating means for calculating the average brightness of the area for each area divided by the area dividing means;
A moving average calculating means for calculating a moving average of the average brightness calculated by the area average calculating means for each area;
The number of areas in which the moving average calculated by the moving average calculating means is lower than the initial value by a predetermined value or more is counted as an index value for each image, and the counted index value exceeds a predetermined threshold value. A slag solidification determining means for determining that an amount of slag that may cause discharge failure has solidified,
An apparatus for determining solidification of slag, comprising:   2. The slag solidification determining means newly counts the number of regions where the moving average has decreased by a predetermined value or more compared to the initial value every time the index value is counted. The slag solidification determination apparatus described in 1.   When the slag solidification determining means counts the index value, the moving average of the remaining areas excluding the counted area that has been counted once in the past has decreased by a predetermined value or more from the initial value. The slag solidification determination apparatus according to claim 1, wherein the number of areas is counted, and the sum of the counted number of areas and the number of counted areas is used as the index value. A slag solidification determination program for determining solidification of slag discharged from a melting furnace,
An area dividing procedure for dividing an image of the outlet of the slag continuously photographed over time into a plurality of areas for each image;
An area average calculation procedure for calculating the average brightness of the area for each area divided by the area division procedure;
A moving average calculation procedure for calculating a moving average of the average brightness calculated by the region average calculation procedure for each region;
The number of areas where the moving average calculated by the moving average calculation procedure is lower than the initial value by a predetermined value or more is counted as an index value for each image, and the counted index value exceeds a predetermined threshold value. A slag solidification determination procedure for determining that an amount of slag that may cause discharge failure has solidified,
Slag solidification determination program characterized by causing a computer to execute. A slag solidification judgment method applied to a melting furnace system for discharging slag,
An area dividing step of dividing an image of the outlet of the slag continuously photographed over time into a plurality of areas for each image;
An area average calculating step for calculating the average brightness of the area for each area divided by the area dividing step;
A moving average calculation step of calculating a moving average of the average brightness calculated by the region average calculation step for each region;
The number of areas where the moving average calculated by the moving average calculation step is lower than the initial value by a predetermined value or more is counted as an index value for each image, and the counted index value exceeds a predetermined threshold value. A slag solidification determining step for determining that an amount of slag that may cause discharge failure has solidified,
A method for determining solidification of slag, comprising:

Images