Analysis on reasons of higher mass fraction of combustible matter in fly ash of flue gas of coalfired boiler and countermeasures

Abstract

Abstract: The mass fraction of the combustible matter in fly ash greatly influences on the economic efficiency of the coalfired unit. In the heat loss of the boiler, the heat loss caused by mechanically incomplete combustion is about 2% and only less than the heat loss caused by the exhaust flue gas. Since the 420t/h boiler of a power plant in Guizhou was put into operation, the mass fraction of combustible matter in the fly ash is always higher. According to analysis, the reasons of the higher mass fraction of combustible matter in fly ash were found. The boiler equipments were reformed, and the combustion in the boiler was adjusted. So the mass fraction of the combustible matter in fly ash had been decreased greatly; and favorable economic benefit was obtained.

Key words: coal-fired boiler, combustible matter in fly ash, burner, reformation, economic efficiency

HUANG Yanzhang. Analysis on reasons of higher mass fraction of combustible matter in fly ash of flue gas of coalfired boiler and countermeasures[J]. Huadian Technology, 2012, 34(4): 45-46.

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Analysis on reasons of higher mass fraction of combustible matter in fly ash of flue gas of coalfired boiler and countermeasures

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