TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: The mixing chamber for the conditioning device and/or the mixing chamber for the torrefaction device are suitable for mixing hot flue gas from the boiler at a temperature of 300-350 degrees C and cold flue gas from the boiler at a temperature of 160 degrees C. The mixing chamber for the conditioning device and the mixing chamber for the torrefaction device are spaced from each other and are independently operable. The drying device, the conditioning device and/or the torrefaction device are spaced from each other and are independently operable. The device further comprises a drying device for drying the biomass using exhaust steam from the turbine and/or cold flue gas from the boiler, a cooling device for cooling the torrefied biomass using flue gas from the conditioning device, exhaust steam from the turbine and/or dryer exhaust air of a drying device, a return pipe for transporting condensate from the drying device to the boiler, a return pipe for transporting the flue gas from the cooling device to the combustion chamber, E-filter, mixing chamber for the torrefaction device and/or the torrefaction device, a return pipe for transporting the flue gas from the conditioning device to the cooling device and/or a return line for transporting flue- and torrefied gas from the torrefaction device to the combustion chamber, and a pelletizing device, a gasification device and/or a rebounding crushing device. The return pipe is double-walled such that inner side of the return pipe is conducted with cold gas and outer side of the return pipe is conducted with hot gas. The drying device reduces the moisture content of the biomass to 5-30%, preferably 8-15%. The conditioning device is suitable for conditioning the dried biomass to a moisture content of 0-2%, preferably 0-0.5%. Preferred Method: The flue gas having a temperature of 300-350 degrees C and the flue gas having a temperature of 160 degrees C are mixed in the mixing chamber for the conditioning device and/or the mixing chamber for the torrefaction device. The drying of the biomass is carried out using exhaust steam from the turbine and/or cold flue gas from the boiler. The torrefied biomass is cooled using the flue gas from the conditioning device, exhaust steam from the turbine and/or the dryer exhaust air from the drying device. The biomass is dried to a moisture content of 5-30%, preferably 8-15%. The dried biomass is conditioned to a moisture content of 0-2%, preferably 0-0.5%. The torrefied biomass is pelletized, gasified and/or crushed. EXAMPLE - No suitable example given.