FLUE GAS HEAT UTILISATION DEVICE AND METHOD OF ITS OPERATION Russian patent published in 2011 - IPC F22B1/18 

FIELD: power industry.

SUBSTANCE: flue gas heat utilisation device includes gas-to-gas surface plate-type heat exchanger in which initial flue gases are cooled, and counter-flow heats dried flue gases. Cooled wet flue gases are supplied to gas-air surface plate-type heat exchanger-condenser, where water vapours contained in flue gases are condensed, thus heating the air. Heated air is used for heating of rooms and for combustion process in the boiler. After additional processing the condensate is used for compensation of losses in heating network or steam-turbine cycle. Dried flue gases are supplied by additional induced-draft fan to the above heater, where they are heated in order to prevent possible condensation of water vapours in flue gas ducts and stack and are supplied to stack.

EFFECT: increasing use efficiency of low-potential heat of condensation of water vapours contained in flue gases.

2 cl, 1 dwg