KR100240228B1 - A burner`s flame monitor and diagnosis apparatus for a thermal power plant using a h.s.i color model - Google Patents

Abstract

The present invention relates to a burner flame monitoring and diagnostic apparatus for power generation equipment that detects abnormal causes and supports the operation of a driver by analyzing burner flame conditions using a H.S.I color model. The present invention converts an RGB color model of a flame image captured by an image sensor installed adjacent to a burner into an HSI color model, and based on the RGB color model and the HSI color model, stability, transparency, and temperature of the flame of the burner are determined. And a diagnostic computer for informing the driver of the abnormal driving situation and the evaluation result according to the determination result. The present invention stably performs the combustion process, it is possible to increase the operating efficiency and reduce the operating cost and manpower by setting the optimum combustion conditions in the power generation equipment to automatic control. In particular, the amount of nitrogen oxides, carbon monoxide, and harmful fine dust, which are the targets of environmental pollution, can be greatly reduced, and in the case of incineration facilities, simulation can be performed by newly setting the diagnostic conditions according to the type and nature of waste. There is a useful effect that can obtain the optimum operating conditions prior to operation.

Description

Burner flame monitoring diagnosis device for power generation equipment using H.S.I color model

The present invention uses the HSI color model to detect the abnormal operation situation according to the flame image of the burner of the power plant and to maximize the operating efficiency of the power plant by setting the optimum operating conditions according to the type and nature of the fuel used. The present invention relates to a burner flame monitoring diagnostic apparatus for power generation equipment.

In general, a plurality of burners are installed in a boiler of a power generation facility that produces electricity, and the combustion operation is started by igniting the burners under appropriate operating conditions. Afterwards, incineration operation is performed by newly assigning driving conditions according to the type and nature of the fuel used, and the driver has set the operating conditions by analyzing the flame images of the burners obtained from the photographing apparatus installed adjacent to the burners based on experience.

Also, in recent years, a flame CCD image of a burner is photographed using a color CCD camera, and the captured image is decomposed into R (red), G (green), and B (blue) components, and then stability of the burner flame complexed. The operation conditions are set by finding out the transparency and temperature. As such, when the operation conditions are newly set, the operation operation to reduce the amount of nitrogen oxides (NOx) and carbon monoxide (CO) and to reduce harmful tailings is required. The flame images of the burned burners are R (red), G ( In the case of analysis with green) and B (blue) components, it was insufficient to accurately analyze severely changed burner flames, and thus, satisfactory results were not obtained in setting the optimum operating conditions. Another conventional technique is to install a spectral scanner adjacent to a burner, find out the spectral distribution for each flame image of the burner, and then quantitatively adjust nitrogen oxides, carbon monoxide, and unburned fuel according to the distribution of spectral power. However, the configuration of the device for this is not only complicated in terms of hardware, but also has a problem in the practical use due to the economic burden such as having to provide an expensive scanner.

An object of the present invention is to analyze the burner flame state using the HSI color model to detect the cause of the abnormality, to find out the optimal operating conditions according to the type and nature of the fuel used through the simulation before operating the actual power plant Therefore, it is to provide burner flame monitoring and diagnostic apparatus for power generation equipment using HSI color model which can greatly increase the operating efficiency of fuel.

1 is a block diagram of a burner flame monitoring diagnostic apparatus for power generation equipment according to the present invention,

Figure 2 is a detailed configuration of the diagnostic computer of the present invention.

Explanation of symbols on the main parts of the drawings

10: image sensor part 11a-11d: burner

20: diagnostic computer 21: color separation unit

22: color synthesis part 23: stability

24: transparency plate 25: temperature plate

26: comparison unit 27: diagnostic unit

28: abnormal type detection unit 29: average luminance level detection unit

30: burner control unit 40: monitor

50: key input unit 60: alarm generating unit

An object of the present invention as described above in the burner flame monitoring diagnostic apparatus for informing the burner controller of the appropriate combustion conditions for the fuel used by photographing the flames of the burners installed in the boiler and analyzing the flame images taken, Converts the RGB color model of the flame image captured by the image sensor installed adjacent to the burner into an HSI color model, and determines the stability, transparency and temperature of the flame of the burner based on the RGB color model and the HSI color model; It is achieved by a diagnostic computer that informs the driver of abnormal driving conditions and evaluation results according to the determination result.

Hereinafter, a preferred embodiment of the present invention will be described in detail according to the accompanying drawings.

As shown in FIG. 1, the present invention is installed adjacent to the burners (11a to 11d) and the RGB color model and HSI for the flame image taken by the image sensor unit 10 and the image sensor unit 10 for shooting a flame The diagnostic computer 20 and the diagnostic computer 20 for determining the stability, transparency, and temperature of the burner's flame based on the color model, and detecting abnormal operation conditions according to the determination result, A burner control unit 30 for driving a burner by receiving a signal and a monitor 40 for displaying diagnostic information on burner flames from the diagnostic computer 20, and instructing a diagnostic operation or inputting a new operating condition for diagnosis. And an alarm generating unit 60 for generating an alarm sound to inform an abnormal operation situation according to a control signal from the key input unit 50 and the diagnostic computer 20 for the purpose.

The diagnostic computer 20 includes a color separation unit 21 for separating the signals captured by the image sensor unit 10 into R, G, and B color signals, and R, G, and B color signals to detect the temperature distribution of the burner flame. A color combining unit 22 for synthesizing the same, a stability determining unit 23 for determining the stability of the flame based on the R, G, B color models and the HSI color models of the color separating unit 21, and the color separation. Transparency judgment unit 24 for determining the transparency of the flame based on the R, G, B color model and HSI color model of the unit 21, and the R, G, B color model and HSI of the color separation unit 21. The temperature determination unit 25 determines the temperature of the flame based on the color model, and compares the determination results of the stability determination unit 23 with the transparency determination unit 24 and the temperature determination unit 25 with preset reference values. The comparison unit 26, an abnormality for burner operation according to the diagnosis result of the diagnosis part 27 and the diagnosis part 27 diagnosed with the diagnosis logic programmed according to the comparison result of the comparison part. And a later type detector 28 for detecting the type. The diagnostic computer 20 further includes an average brightness level detector 29 for detecting whether the burner is ignited in accordance with the brightness level of the flame image of the burner.

The operation and effect of the present invention having the above configuration will be described. First, a plurality of image sensor units 10 are installed adjacent to the burners 11a to 11d, but are installed in a tube made of an optical fiber in consideration of a high temperature installation environment. The flame image photographed by the image sensor unit 10 is applied to the diagnostic computer 20. The diagnostic computer 20 receives the flame image of the burner from the image sensor unit 10, analyzes the flame state based on the RGB color model and the HSI color model for the flame image, and compares the abnormal state with the normal operation. Determination of operation is made and appropriate countermeasures are taken, which will be described in detail with reference to FIG. 2.

2 is a detailed configuration diagram of the diagnostic computer 20 of the present invention. In FIG. 2, the color signal separator 21 receives a flame image captured by the image sensor unit 10 and separates color components according to an RGB color model. The color signal separator 21 outputs the separated RGB color components to the color combiner 22. The color synthesizing unit 22 synthesizes the separated RGB color components to find the temperature distribution of the received flame image. The stability judgment unit 23 analyzes the stability based on the RGB color model and the HSI color model of the flame image of the burner, and the transparency judgment unit 24 is based on the RGB color model and the HSI color model of the flame image of the burner. The transparency is analyzed, and the temperature determiner 25 analyzes the temperature based on the RGB color model and the HSI color model of the flame image of the burner. Here, the H.S.I color model commonly applied to the stability determiner 23, the transparency determiner 24, and the temperature determiner 25 will be described.

The H.S.I color model is defined by the following equation and is another representation of flame images.

C = H h + S s + I i ----- Color Model

Where H is the dominant hue for the pixel, S is the blend of white color for that pixel, and I is the contrast of the color for that pixel. In addition, i is intensity, h is hue, and s is each unit vector for saturation.

In the color model equation, H (hue) is expressed as in Equation (1).

H = [256 / (λmax-λmin)] * (λmax-λ) ---- equation (1)

[Lambda] of Formula (1) represents radical self-luminescence and is represented by Formula (2).

λ = [(λmin-λmax) / 256] * H + λmax ---- equation (2)

Here, lambda max is the maximum wavelength that an image sensor (CCD camera) can measure, and lambda min is the minimum wavelength that an image sensor can measure.

In the color model, I (intensity) is represented by equation (3).

I = Es / Emax ---- Formula (3)

Es in Equation (3) represents radiation energy for any pixel, and is represented by Equation (4).

Es = (3/8) E (T) (d / I) (cosθ / m) ---- equation (4)

Here, Emax is the maximum measurement energy that the image sensor can measure, E (T) is the light energy emitted from the incineration object, d is the diameter of the photographing lens attached to the image sensor, I is the shooting distance, θ is the shooting It is the inclination angle with respect to the target point, and m represents the magnification of the photographing lens.

In the color model, S (saturation) is represented by equation (5).

S ∝ (1 / (λmajor-λminor) ---- equation (5)

Where [lambda] major is the luminance of the dominant illuminant and [lambda] minor is the luminance of the dominant illuminant.

The stability determiner 23, the transparency determiner 24, and the temperature determiner 25 use the RGB color model defined by the color signal separator 21 and the HSI color model defined by Equations (1) to (5). The current values for stability, transparency, and temperature to be determined can be obtained.

The stability determiner 23, the transparency determiner 24, and the temperature determiner 25 output the determination result to the comparator 26. The comparison unit 26 compares the determination result of the stability, transparency, and temperature of the flame image of the current burner with a reference value stored in advance, and compares the information on the difference value according to the comparison result to the diagnosis unit 27. Output The diagnosis unit 27 receives a comparison result of the stability, transparency, and temperature of the flame image of the burner, and performs diagnosis of the comparison result using a diagnostic logic programmed in advance. The error type detection unit 28 detects an error type according to an error operation according to the diagnosis result of the diagnosis unit 27 and outputs a control signal to the alarm generation unit 60 to notify the driver of the detection result. The abnormal type detected by the abnormal type detection unit 28 is a high NOx operation in which nitrogen oxide is excessively generated, a high dust operation in which dust is excessively generated, an individual burner abnormal operation informing of a faulty burner, a flame of a specific burner. It detects abnormality of operation error that can be estimated from burner flame for burner tip abnormal operation and so on.

The average luminance level detection unit 29 receives the photographing signal from the image sensor unit 10 and detects the luminance level of the average value. When the average luminance level detection unit 29 does not reach the luminance level of the average value, the average burner level detection unit 29 recognizes that the burner does not occur. The burner control unit 30 outputs the detection result. Accordingly, the burner control unit 30 may control the ignition operation of the burner in accordance with the combustion operation operation.

The alarm generating unit 60 generates an alarm sound corresponding to the abnormal situation according to the control signal from the abnormal situation detecting unit 28.

The abnormal situation detection unit 28 displays the information on the abnormal situation through the monitor 40. For example, the evaluation indicators for stability, transparency, and temperature corresponding to the burner may be displayed in a diagram form or for a specific burner. Performance evaluation and burner tip clogging can be indicated.

The diagnostic computer 20 is stable to the flame of the burner by changing the operation data, that is, the reference value stored in the comparison unit 26 or the diagnostic logic programmed in the diagnostic unit 27 according to the type and nature of the fuel used. And the normal values for transparency and temperature can be set variably, and abnormal types are detected according to the newly set normal values. In addition, the diagnostic computer 20 may perform simulation by inputting virtual data corresponding to the operating conditions in actual operation before using the power generation equipment in actual operation.

As described above, the present invention can precisely inspect the ignition operation and the flame state of the burners installed in a plurality of power generation facilities by using the RGB color model and the HSI color model, so that the combustion process can be stably performed as well as the multiple burners. The air-fuel ratio for can be controlled appropriately. Therefore, by setting the optimum combustion condition in the power generation equipment to automatic control, it is possible to increase operation efficiency, reduce operating cost and manpower. In particular, it is possible to significantly reduce the amount of nitrogen oxide and carbon dioxide and harmful fine dust, which are the targets of environmental pollution. Moreover, since the calorific value and the flammability are different according to the type and nature of the fuel used, it is useful to obtain the optimal operating conditions before the actual operation, such as to newly set the diagnostic conditions and to carry out the simulation.

Claims (3)

In the burner flame monitoring and diagnosis device to shoot the flames of the burners installed in the boiler, and to analyze the flame images taken to inform the burner control unit of the proper combustion conditions for the fuel used, The RGB color model of the flame image photographed by the image sensor adjacent to the burner is converted into an HSI color model, and the stability, transparency and temperature of the flame of the burner are determined based on the RGB color model and the HSI color model. And a burner flame monitoring and diagnostic apparatus for a power plant using an HSI color model, comprising a diagnostic computer for notifying the driver of abnormal driving conditions and evaluation results according to the determination result. The apparatus of claim 1, wherein the diagnostic computer combines a color separation unit for separating the signal photographed by the image sensor into R, G, and B color signals, and synthesizes R, G, and B color signals to detect a temperature distribution of a burner flame. A stability judging unit for determining the flame stability based on a color combining unit, an R, G, B color model and an HSI color model of the color separating unit, and an R, G, B color model and an HSI color model of the color separating unit. A transparency judging unit for determining the transparency of the flame, a temperature judging unit judging the temperature of the flame based on the R, G, B color models and the HSI color models of the color separation unit, the stability judging unit and the transparency judging unit And a comparison unit comparing the determination result of the temperature determination unit with a preset reference value, a diagnosis unit diagnosed by a diagnostic logic programmed according to the comparison result of the comparison unit, and detecting an abnormal type of burner operation according to the diagnosis result of the diagnosis unit. Ideal Type Sword Power plant burner flame monitoring diagnostic apparatus using H.S.I color model comprising wealth. The diagnostic computer according to claim 1, wherein the diagnostic computer variably sets the normal value for the flame, the transparency and the temperature of the burner according to the type and the nature of the fuel used, and detects the abnormal type according to the set normal value. Burner flame monitoring diagnosis device for power generation equipment using HSI color model.

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