The fluid bed drying system with direct feeding converts dewatered sludge into almost dust-free granules with > 90% DS. The thermal heat for evaporation of the water is transferred indirectly by a heat exchanger immersed in the fluid bed. The fluid bed dryer is integrated into an inert gas loop system.
The fluid bed drying system (FDS) is designed for drying of mechanically dewatered sludge in the fluid bed dryer filled with dried granules. The granules are suspended in a gas stream passing through the product layer.