1
61 Description Application Technical features Capacities and Options: – Fully integrated control of dryer and energy plant – Fully welded drum shell with alternating sections of cruxiform internals and lifting blades – Gear box with frequency-controlled main motor and backup motor for emergency case – Minimal air leakage due to proven seal technology – Dryer exhaust gas recovery – Fully integrated dryer deluge system Heat sources for direct heating Flue gases from – Gas, dust, light and/or heavy oil burner – Energy system (e.g., grate firing systems) – Turbine exhaust gas – Combination of heating systems mentioned above Heat sources for indirect heating – Heat exchangers with steam or thermal oil – PB and pellets: up to 100 t/h b.d. with evapora- tion rates of 80 t/h – OSB: up to 60 t/h b.d. with evaporation rate of 60 t/h Options: – Flue gas cleaning with refractory-lined hot gas cyclone to reduce wear in the drying system – Pre-dryer with heavy-part separation and second infeed for reject material – Discharge box for gentle discharge of heavy and sensitive material Customer benefits – High capacity – Internals designed according to material char- acteristics for high thermal efficiency and low moisture fluctuation – Optimized drum using FEM – High standard of safety and reliability – Low risk of fire and explosion – Design acc. to ATEX directive 2014/34/EU – Optimized cyclone design – 3D modeling Wet material is fed via a rotary valve and a specially designed infeed chute into the rotating drum. There, the heat is transferred mainly through convection from the drying gases to the material for water evaporation. At the end of the drum, the material is pneumatically transported to cyclones where the material is separated from the drying gases. One portion of the drying gases is recircu- lated to the mixing chamber for energy recovery and reduction of dryer exhaust volume. Drying of: – Wood particles, e.g., sawdust, mini chips, recycling material for PB and pellet production – Strands and wafers for OSB production – Disintegrated seasonal annual crops and other biomass for a wide range of applications Drum Dryer ENERGY SYSTEMS, DRYING
