METHOD OF FLUE GASES DEEP HEAT RECOVERY Russian patent published in 2017 - IPC F24H8/00 F22B1/18 F24H3/06 

FIELD: power engineering.

SUBSTANCE: invention relates to heat engineering. Flue gases deep heat recovery method involves flue gases preliminary cooling in gas/gas surface plate heat exchanger, heating dried flue gases by counterflow, to generate temperature margin, preventing residual water vapors condensation in stack. Further flue gases cooling to temperature close to water vapors dew point, is carried out in a contact gas-water water heater, which heats water. Cooled wet flue gases are supplied into gas/air surface plate heat exchanger-condenser, where water vapors contained in flue gases are condensed, heating air. Dried flue gases are supplied by additional smoke sucker into gas/gas surface plate heat exchanger, where they are heated to prevent possible water vapors condensation in gas ducts and flue pipe and are directed into smoke stack.

EFFECT: increasing flue gases heat recovery efficiency due to use of water vapors condensation latent heat and increased temperature of flue gases themselves.

1 cl, 1 dwg, 1 tbl