FIELD: power engineering.
SUBSTANCE: method for reducing emissions of nitrogen oxides during the combustion of coal dust, which consists in the fact that coal dust is devolatized in a fluidized bed heat exchanger, the heating element in which is heating surfaces with superheated steam or electric heaters, and flue gases or air are blasts for fluidizing coal dust, subsequent supply of heat-treated coal dust from the fluidized bed heat exchanger to pulverized coal burners, and devolatization products to gas burners installed above the pulverized coal burners, to organize three-stage combustion, tertiary air blast nozzles are installed above the gas burners.
EFFECT: reduction of nitrogen oxides.
1 cl, 1 dwg
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