KR200267510Y1 - an apparatus for watching a boiler's flames of power station - Google Patents

Abstract

The present invention relates to a flame identification device for monitoring the combustion state of an industrial or business boiler of a thermal power plant. In order to maintain individual burner flames in a boiler with dozens of burners, each image signal of each burner flame is By using the flame sensing device to identify the burned state of the burner, it prevents the risk of explosion due to the ignition miscalculation due to the mixing of surrounding flames or background radiation and provides a quantitative stability index to make the flame unstable or misfire. By warning before it occurs, it is possible to maintain stable operation and to accurately detect the misfire state, thereby preventing the stop accident due to misfire misoperation even at low load operation.

Description

An apparatus for watching a boiler's flames of power station

The present invention relates to a flame identification method for monitoring the combustion state of an industrial or business boiler of a thermal power plant. In order to maintain individual burner flames in a boiler with dozens of burners, each image signal of each burner flame is It relates to a flame monitoring device that can identify the burn state of the burner by using.

Conventionally, the luminance level of a video signal received from a flame imager is compared with a set value, and the number of pixels in an area where the luminance level is greater than the set value is calculated. The method was used. In this type, the ignition detection is possible in the normal load operation, but in the low load operation, a malfunction that often determines the misfire in the case of ignition according to the selection of the set value occurs. There is a method of detecting unstable combustion by calculating the average of luminance per each divided zone by different methods and calculating dispersion within a certain time, but there is a problem of identifying a misfire in case of misfire due to the mixing of surrounding flame or background light. .

Therefore, the purpose of the present invention is to extract the flame region through the processing of Hue Intensity and Saturation of a plurality of flame images, and then determine the flame stability by using the HUE HISTOGRAM of the region. By identifying the misfire by using the average luminance, it is possible to eliminate the possibility of misunderstanding due to the mixing of flame or background light of adjacent butter and to provide the power plant boiler flame detection value to prevent misfire determination even under low load operation. There is.

In order to achieve the above object, the present invention, the boiler furnace 100, and installed in the boiler furnace 100, using coal, petroleum, gas, etc. as a furnace, generates a flame 300 to heat the boiler A burner 200 for supplying, a flame receiving unit 400 for acquiring and transmitting an image of the flame 300, a flame monitoring panel 600 for receiving and processing an image signal 510 from the flame receiving unit 400, In the power plant boiler flame monitoring device consisting of a monitoring monitor 700 for displaying the output of the flame monitoring panel 600,

The flame monitor panel receives the image signal and performs H, I, S (Hue, Intensity, Saturation) arithmetic processing for each pixel of the image to have a level of 0 to 255. HIS operation processing unit for performing statistical processing for each of the S, and outputs the result value; Flame image extraction unit for removing the background light or flame interference through the filtering to extract the effective flame region; And a combustion monitoring process for evaluating flame stability, identifying ignition misfire, and monitoring combustion conditions using the mean and dispersion values of H, I, and S in the effective flame zone as indicators.

1 is an overall system configuration of a power plant boiler flame monitoring apparatus according to an embodiment of the present invention,

2 is an internal configuration of a flame monitor panel mounted in the power plant boiler flame monitoring apparatus according to an embodiment of the present invention,

3 is a video signal processing flowchart by the power plant boiler flame monitoring method according to an embodiment of the present invention,

4A is an image of a flame extracted by the flame image extractor according to one embodiment of the present invention, FIG. 4B is an unfiltered hugh image, and FIG. 4C is a filtered hugh image.

* Description of the main parts of the drawings *

100. boiler circuit, 200 burners,

300. Flame, 400. Flame Receiver,

500. Flame imager, 510. Video signal,

600. Flame Monitoring Board, 610. HIS Computation Processing Unit,

620. Flame image extractor, 640. Combustion monitoring processor,

641. Stability determination unit, 642. Ignition misfire identification unit,

643. Anomaly alarming unit, 700. Surveillance monitor.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, specific details such as specific components are shown, which are provided to help a more general understanding of the present invention, and it is understood that these specific matters may be changed or changed within the scope of the present invention. It is self-evident to those of ordinary knowledge in Esau.

1 is an overall system configuration of a power plant boiler flame monitoring apparatus according to an embodiment of the present invention, Figure 2 is a flame monitoring panel internal configuration diagram mounted in the power plant boiler flame monitoring apparatus according to an embodiment of the present invention.

Boiler furnace 100 serves to supply heat to the necessary device.

In addition, the burner 200 is installed in the boiler furnace 100 to use coal, petroleum, gas, etc. as a flue, and generates a flame 300 serves to supply heat to the boiler.

On the other hand, the flame receiving unit 400 serves to obtain an image of the flame 300 and deliver it to the flame imager 500.

In addition, the flame imaging apparatus 500 receives an image signal 510 from the flame receiving unit 400 and outputs the image signal 510 to the flame monitoring panel 600.

On the other hand, the flame monitor panel 600 serves to process the input image signal 510 to output to the monitoring monitor (700).

In addition, the monitoring monitor 700 serves to display a signal received from the flame monitor panel (600).

Meanwhile, the HIS operation processor 610 mounted in the flame monitor panel 600 receives the image signal and performs H, I, S (Hue, Intensity, Saturation) calculation processing for each pixel of the image to perform the image signal. Is a value having a level from 0 to 255, and statistically processes H, I, and S and outputs the result to the flame image extracting unit 620.

In addition, the flame image extraction unit 620 mounted in the flame monitor panel 600 removes the background light or flame interference through filtering, and extracts the effective flame region, thereby eliminating the possibility of ignition misfire combustion monitoring unit 640 This process is shown in detail in Figures 4a, 4b and 4c.

On the other hand, the combustion monitoring unit 640 mounted in the flame monitor panel 600 evaluates the flame stability by using the average and the dispersion value of H, I, S for the effective flame region as an index, and identifies the ignition misfire It also monitors combustion status.

In addition, the stability determining unit 641 mounted in the combustion monitoring unit 640 receives the extraction signal output from the flame image extracting unit 620 to perform a long-term evaluation of flame stability, and the quantified value thereof. And outputs them to the monitoring monitor 700 as charts and graphs.

Meanwhile, the ignition misfire identification unit 642 mounted in the combustion monitoring unit 640 receives the extraction signal output from the flame image extracting unit 620 to identify the ignition misfire by using the I average, and determines the hue histogram. By comparison, even when the load is low, it is not identified as a misfire, and when the misfire plays a role of transmitting a burner interlock signal to the abnormal alarm processor 643.

In addition, the abnormality alarm processing unit 643 mounted in the combustion monitoring unit 640 serves to detect the misfire when the interlock signal is input.

3 is a video signal processing flow chart according to the power plant boiler flame monitoring method according to an embodiment of the present invention.

First, the complex misfire identification unit 642 receives the I average value and the histogram output from the flame image extraction unit 620 (S1).

Subsequently, if the I average value is smaller than the first predetermined value, it is determined as true and proceeds to the fifth step. If the I average value is larger than the first predetermined value, the process proceeds to the third step (S2). .

Then, if the I average value is larger than the second predetermined value, it is determined as ignition, and if the I average value is smaller than the second predetermined value, the process proceeds to the fourth step (S3).

Subsequently, if the histogram value is larger than the reference value, it is determined to be ignited. If the histogram value is smaller than the reference value, it is determined to be a true value and proceeds to step 5 (S4).

Then, the misfire identification section sends the burner interlock signal to the abnormality alarm processing section (S5).

As described above, the present invention, in the development of a device for monitoring the combustion state of the burner installed in an industrial or business boiler such as a thermal power plant, effective flame for the determination of flame stability using the image signal received from the flame imager In addition to preventing the risk of explosion due to ignition miscalculation due to surrounding flames or background light, the pretreatment process extracts the area, and provides a quantitative stability index to warn before the flame becomes unstable or misfire. In addition to maintaining it, it is possible to prevent the accident due to misfire by accurately detecting the misfire state.

Claims (2)

Boiler furnace 100, and installed in the boiler furnace 100, using coal, petroleum, gas, etc. as a fuel, burner 200 for generating a flame 300 to supply heat to the boiler, and the flame ( Flame receiving unit 400 for acquiring and transmitting the image of the 300, flame monitor panel 600 for receiving and processing the image signal 510 from the flame receiving unit 400 through the flame imager 500, and the flame In the power plant boiler flame monitoring device composed of a monitoring monitor 700 for displaying the output of the monitoring panel 600, The flame monitor panel receives the image signal and performs H, I, S (Hue, Intensity, Saturation) arithmetic processing for each pixel of the image to have a level of 0 to 255. HIS operation processing unit for performing statistical processing for each of the S, and outputs the result value; Flame image extraction unit for removing the background light or flame interference through the filtering to extract the effective flame region; And a combustion monitoring unit for evaluating flame stability, identifying ignition misfire, and monitoring combustion conditions using the average and dispersion values of H, I, and S in the effective flame zone as indicators. Boiler flame monitor. The method of claim 1, The combustion monitoring unit may include: a stability determining unit configured to receive an extraction signal output from the flame image extracting unit, perform a long-term evaluation of flame stability, and output the quantified values to the monitoring monitor as charts and graphs; By receiving the extracted signal output from the flame image extractor to identify the ignition misfire by using the I average, by comparing the histogram not to be identified as a misfire even under low load, and when burned out burner interlock signal Misfired identification unit; And an abnormality alarm processor configured to detect a misfire when the interlock signal is input.