Patent ID: 6588349
Filing Date: 2003-07-08
Classification: F23G

Abstract:
System for drying a damp biofuel, said system comprisinga boiler (1), preferably a fluidized bed boiler, for combustion of the fuel, a first heat drying chamber (2), a drying gas flow (3) heated by the thermal energy of the combustion gases from the boiler, secondary energy obtained from waters used in the processes and/or by steam, said gas flow being passed into the first heat drying chamber, and a fuel supply (4) for passing the fuel into the first heat drying chamber, characterized in that the system comprises a second heat drying chamber (5), an intermediate heating unit (6) for heating the drying gas flow before the second heat drying chamber an intermediate supply (7) for passing the fuel from the first heat drying chamber into the second heat drying chamber, a boiler supply (8) for passing the fuel from the final heat drying chamber into the boiler and an outlet (9) for passing the flow of drying gas from the final heat drying chamber into the boiler.