METHOD OF STEAM BOILER OPERATION Russian patent published in 2017 - IPC F22B1/00 F23N5/00 

FIELD: heating system.

SUBSTANCE: method of steam boiler operation, after which air and natural gas used as fuel are fed into furnace, the warmth of products of combustion is derived to boiler water and steam, after which the outgoing gases are removed from the boiler to atmosphere, blowoff water is derived from boiler drum. Blowoff water is injected in the furnace of boiler, thereby reducing the temperature of combustion products and suppressing the formation of nitrogen oxides in the furnace, the amount of the injected blowoff water is controlled by the pulse from the temperature sensor of combustion products in the most heat stressed part of the furnace, the outgoing gases are cooled below the condensation temperature of water steam, formed during the injection of blowoff water into the furnace, and the condensate formed during the cooling of outgoing gases is used in the steam-water cycle of the boiler, for example, is fed into the feedwater deaerator.

EFFECT: decrease in temperature in the most heat-stressed part of the furnace and prevention of formation of nitrogen oxides.

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