Patent ID: 8429832

Claim:
Process for heat recovery in a dryer section of a paper machine, where a paper web is dried with a steam-heated dryer ( 2 ) and a high-temperature hood ( 1 ) supplied with hot air, comprising: supplying waste steam ( 5 , 5 ′) from a steam system to a steam separator ( 6 , 6 ′), where steam is separated from condensate; passing at least a part of the condensate through a heat exchanger ( 8 ); heating and increasing the temperature of the condensate in the heat exchanger by transferring heat from exhaust air ( 4 ) of the high temperature hood ( 1 ) passing through the heat exchanger; and returning the heated condensate as steam to the steam separator ( 6 , 6 ′); wherein the steam separator ( 6 , 6 ′) is at a pressure and the heat exchanger ( 8 ) is at a pressure greater than the pressure in the steam separator, whereby the condensate does not evaporate in the heat exchanger.