Method for drying mass of fibrous material comprises ventilating moist air through material in drying zone and recovering condensation heat from water vapor extracted from material to heat moist air

摘要

The methods comprises using a fan (1) to ventilate very moist air through the fibrous material (14) located in a drying zone (13). The moisture content of the air is less than that in the drying zone, its pressure being close to atmospheric and its temperature higher than that of the material to be dried. The condensation heat of the water vapor extracted from the material is then recovered though a recovery circuit(22,6) in order to heat the moist air. Leaks (9,10,36,43) are made between the outside ambient air and the ventilation circuit upstream and downstream of the drying zone enabling mass and heat exchange. An Independent claim is included for a drying installation.