NEUTRALISATION METHOD OF FLUE GAS EMISSIONS, AND BOILER Russian patent published in 2014 - IPC B01D53/56 

FIELD: power industry.

SUBSTANCE: invention relates to a method and a boiler - a steam generator for reduction of amount of nitrogen oxides in flue gas of the boiler, in which flue gas is formed at combustion of fuel in the air. A boiler includes a water circulation system including superheaters (8) and furnace (1), in which fuel is burnt and flue gas is formed, which contains nitrogen oxides; besides, flue gas flows upwards in the furnace; then, it is supplied to a superheater zone and leaves the boiler through other heat-utilising boiler surfaces, and a reducing agent of nitrogen oxides is added to the flue gas. It is important that the reducing agent of nitrogen oxides is added to the flue gas before the superheater zone, before which flue gas temperature is decreased by means of at least one heat exchanger (15) that is located in a flue gas flow before the reducing agent is added to obtain the corresponding temperature interval in the flue gas flow in order to reduce nitrogen oxides.

EFFECT: simplifying the method and improving its efficiency.

16 cl, 2 dwg