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Evaluation method for flame burning condition and stability

A technology of flame combustion and evaluation method, which is applied in the field of energy and environment, and can solve the problems of lower boiler thermal efficiency, lower combustion stability, and deviation of combustion flame conditions, etc., and achieve the effects of less interference, high repeatability, and easy operation

Active Publication Date: 2015-12-23
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Coupled with the complex coal combustion and equipment failures of thermal power units in my country, the combustion flame status often deviates from the optimal working condition, and it cannot guarantee a stable and uniform flame and strong and sufficient combustion in the furnace. The decline in combustion stability will not only lead to boiler thermal efficiency. reduce, and produce more pollutants and noise, which may cause the furnace to extinguish the fire or even induce the furnace explosion in extreme cases

Method used

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  • Evaluation method for flame burning condition and stability
  • Evaluation method for flame burning condition and stability
  • Evaluation method for flame burning condition and stability

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Embodiment 1

[0030] The evaluation method of flame combustion status and stability described in this embodiment, taking red as an example, specifically includes the following steps:

[0031] Step 1) obtain the image of flame burning;

[0032] Step 2) Yes figure 2 Perform processing and intercept the area to be evaluated;

[0033] Step 3) Import the processed picture into Matlab software to obtain the brightness feature matrix R about red ij ;

[0034] Step 4) Select red as the evaluation color, and use an iterative method to determine the optimal threshold T for segmenting the area where the flame is located k =215;

[0035] Step 5) combine each pixel in the brightness feature matrix of the selected color with the threshold T k is compared when R ij ≥T k When R ij k When , it is considered that there is no flame in the area where the pixel is located, and the number of flame pixels obtained is P fire =93829, the total number of pixels is P total =192500. The flame combustion st...

Embodiment 2

[0045] The evaluation method of flame combustion status and stability described in this embodiment, taking green as an example, specifically includes the following steps:

[0046] Step 1) obtain the image of flame burning;

[0047] Step 2) processing the image, intercepting the area to be evaluated;

[0048] Step 3) import the processed picture into Matlab software to obtain the brightness feature matrix G about green ij ;

[0049] Step 4) Select green as the evaluation color, and use an iterative method to determine the optimal threshold T for segmenting the area where the flame is located k =180;

[0050] Step 5) combine each pixel in the brightness feature matrix of the selected color with the threshold T k For comparison, when G ij ≥T k When G ij k When , it is considered that there is no flame in the area where the pixel is located, and the number of flame pixels obtained is P fire =95963, the total number of pixels is P total =192500. The flame combustion statu...

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Abstract

The invention provides an evaluation method for flame burning condition and stability, belonging to the technical field of energy and environment. According to the evaluation method, flame burning images are acquired, brightness feature matrixes Rij, Gij and Bij of three colors of red, green and blue are obtained; one color is selected as an evaluation color, and an evaluation standard optimum threshold Tk of an area, in which the flame is, is determined; each pixel in the brightness feature matrixes and the threshold Tk are compared so as to obtain the flame burning condition; and flame burning images of continuous working condition are acquired, an M value of each image is computed, and the flame burning condition is evaluated according to a mean value as shown in the description. The method provides quantification standards for the flame burning condition and stability and can give an accurate and objective evaluation, and can offer certain guidance for analysis and optimization of the flame burning process. The method is simple to operate, can obtain an accurate result, is fast, has high repeatability, and is less interfered.

Description

technical field [0001] The invention relates to an evaluation method for flame combustion status and stability, belonging to the technical field of energy and environment. Background technique [0002] my country is the largest coal producing and consuming country in the world, and thermal power generating units have always assumed the important task of power production in my country, so the load changes and combustion adjustments of the units change frequently. Coupled with the complex coal combustion and equipment failures of thermal power units in my country, the combustion flame status often deviates from the optimal working condition, and it cannot guarantee a stable and uniform flame and strong and sufficient combustion in the furnace. The decline in combustion stability will not only lead to boiler thermal efficiency. Reduce, and produce more pollutants and noise, in extreme cases may cause furnace fire, or even induce furnace explosion. The pros and cons of combustio...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 徐建新刘泛函王华
Owner KUNMING UNIV OF SCI & TECH
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