BOILER PLANT Russian patent published in 2019 - IPC F22B33/18 

FIELD: heat power engineering.

SUBSTANCE: invention relates to the field of heat power engineering and can be used in the operating on natural gas boiler plants. Boiler plant contains a boiler with flue gas duct, exhaust fan, blower fan, connected by the air duct to a boiler air heater, connected to the flue gas duct by the flue gas recirculation duct with the flue gas recirculation exhaust fan included therein. Upstream of the boiler burner to the flue gas recirculation duct a blow-off water pipeline is connected, and into the flue gas duct between the flue gas recirculation duct connection point thereto, and the exhaust fan, contained in the exhaust gases water vapor condenser is connected, by the cooling medium included into the source water pipeline upstream of the feed water deaerator.

EFFECT: invention allows to increase the boiler plant environmental safety and efficiency by the combustion temperature lowering in the furnace most heat-stressed part, and the nitrogen oxides NO_x in exhaust gases concentration reduction, as well as enable the exhaust gases heat more complete utilization.

1 cl, 1 dwg