SYSTEM FOR THE DRYING OF DAMP BIOMASS BASED FUEL

System for drying a damp biofuel, said system comprising a boiler (1), preferably a fluidized bed boiler, for combustion of the fuel. Further, the system comprises a first heat drying chamber (2), a drying gas flow (3) heated by the thermal energy of the combustion gases from the boiler 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. According to the invention, 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.