SURFACE-MOUNTED HEAT RECOVERY UNIT FOR DEEP HEAT RECOVERY OF FLUE GASES, AND ITS OPERATION METHOD Russian patent published in 2015 - IPC F22B1/18 

FIELD: power industry.

SUBSTANCE: in the heat recovery unit for deep heat recovery of the flue gases according to the invention upstream the chimney an insulated tank with flowing water is installed, it has from the end faces skirts separated by the horizontal shelves to sections. Inside the tank there are parallel rows of pipes and combining volumes of skirts comprising the individual bundles in which the flue gases move in one direction. The pipe bundles alternate with large volumes of the skirt sections changing direction of the flue gases flow in the adjacent bundles, creating so the coil with variable cross-section for the flue gases flow towards the flowing water. The hot flue gases move through the coil, its pipes are inserted in the tank with flowing cooling water. Sulphuric and sulphurous acids condense from the flue gases first of all in the bottom part of the coil, and are washed out using part of the fuel moisture condensate to the acids condensate tank.

EFFECT: invention improves economic parameters of the combined heat and power station, and increased efficiency factor.

3 cl, 2 dwg