Combustion stability discrimination method based on combustion mixing coefficient and fuzzy recognition

Abstract

The invention belongs to the field of combustion flame image processing technology and particularly relates to a combustion stability discrimination method based on a combustion mixing coefficient and fuzzy recognition. According to the method, first, a combustion flame image is subjected to feature extraction, the combustion mixing coefficient, combustion mixing coefficient fluctuation parameters, black dragon length and black dragon length fluctuation parameters are calculated, the combustion mixing coefficient, the combustion mixing coefficient fluctuation parameters, the black dragon length and the black dragon length fluctuation parameters serve as feature indexes, the close degree between a to-be-detected fuzzy set and a stable fuzzy set and the close degree between the to-be-detected fuzzy set and an instable fuzzy set are calculated by selecting a subordinating degree function corresponding to the feature indexes, combustion stability is discriminated according to the principle of closeness optimization, and accordingly the combustion stability discrimination method based on fuzzy recognition is established. Through the method, the influence of the combustion mixing coefficient on combustion stability is fully considered, good flame combustion stability recognition capability is achieved, combustion stability and instability can be correctly distinguished, and accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of combustion flame image processing, and in particular relates to a method for judging combustion stability based on combustion mixing coefficient and fuzzy recognition. Background technique [0002] Coal is one of the main energy sources in my country, and the consumption of coal-fired boilers accounts for a considerable proportion. The combustion stability of power plant boilers is directly related to the reliability and safety of boiler operation. Unstable combustion or poor combustion adjustment will not only cause fluctuations in steam parameters and lower thermal efficiency of boilers, but also may cause furnace fires to be extinguished, and even cause furnace explosions, resulting in Huge economic loss. Therefore, real-time detection of boiler combustion flame, establishment of combustion stability discrimination method, improvement of combustion efficiency and reduction of combustion pollution have...

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Problems solved by technology

[0004] It is worth noting that the mixing effect of pulverized coal and heat flow in the furnace also has an important impact on the combustion conditions in the furnace. The combustion mixing parameter is a characteristic parameter used to characterize the mixing effect of pulverized coal and heat flow in the furnace. If the mixing effect is good, the combustion condition in the furnace is better and the combustion is stable; if the mixing effect is poor, the pulverized coal combustion time will be increased, the pulverized coal combustion efficiency will be reduced, and the combustion will be unstable. Research matters

[0005] It can be seen from the above that the combustion stability discrimination method based on the flame image is not mature enough at this stage, and it does not consider the influence of the combustion mixing coefficient on the combustion stability of the boiler, resulting in low accuracy of the combustion stability discrimination results

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