FUEL COMBUSTION METHOD Russian patent published in 2011 - IPC F23C9/00 

FIELD: power industry.

SUBSTANCE: some portion of cooled flue gases is added to blast air, formed gas-air mixture is supplied by fan to gas-air mixture heater in which it is heated owing to heat of flue gases, and together with fuel it is supplied to combustion, and some part of cooled flue gases is supplied to be recirculated in order to add it to again coming cold air. At that, after gas-air mixture heater the condensate obtained in process heat exchanger is injected to flue gas flow; formed steam-gas mixture is condensed in process heat exchanger; control of temperature and saturation of steam-gas mixture supplied to process heat exchanger installed after gas-air mixture heater is performed by changing the quantity of injected condensate, and excess condensate formed due to condensation of water vapours of combustion products is extracted from closed condensate circuit and supplied to fuel heater to heat the natural gas.

EFFECT: effective heating of the main heat carrier by means of intermediate heat carrier represented by steam-gas mixture.

3 dwg