METHOD OF UTILISING FLUE GAS HEAT Russian patent published in 2011 - IPC D21C11/06 

FIELD: chemistry.

SUBSTANCE: vapour-containing flue gases are fed into a surface heat-exchanger where they are cooled. Further, the vapour-containing flue gases are fed into a mixing heat exchanger at pressure 1-15 bars where adiabatic cooling takes place to saturation temperature, after which the vapour-containing flue gases are fed into an evaporation apparatus for evaporation of alkali-containing solutions. From the evaporation apparatus, the vapour-containing flue gases are once again fed into the surface heat exchanger where they are heated to temperature which is 5-20°C higher than the saturation temperature of water vapour and are released outside through a flue-pipe.

EFFECT: high efficiency of utilising heat of vapour-containing flue gases.

3 dwg