Air distribulion Figure 10. Typical batch fluid bed dryer 5.3 Batch Rotary Dryers Ina rotary dryer, a horizontal cylinder is used to contain the batch while heated air is passed across the length of the cylinder. A jacket can be placed on the outside of the cylinder where steam or hot water is introduced to aid in heat transfer via conduction through the walls. Sometimes tator shaft with paddle arms, either heated or unheated, are included in design to assist in heat transfer and product discharge 5.4 Ribbon Dryers This type consists of a long, jacketed, horizontal cylinder, or a"U shaped trough, which contains an agitator shaft positioned down the length of the bowl. The purpose of the cylindrical-shaped vessel may be for operation under pressure or vacuum. The agitator spokes are intermittentlyDrying 741 Exhaust air Exhwt duct R Filk h I oT tort,& filters - Material / contoiner Air preporation Material , unit Figure 10. Typical batch fluid bed dryer. 5.3 Batch Rotary Dryers ha batch rotary dryer, a horizontal cylinder is used to contain the batch while heated air is passed across the length of the cylinder. A jacket can be placed on the outside of the cylinder where steam or hot water is introduced to aid in heat transfer via conduction through the walls. Sometimes an agitator shaft with paddle arms, either heated or unheated, are included in the design to assist in heat transfer and product discharge. 5.4 Ribbon Dryers This type consists of a long, jacketed, horizontal cylinder, or a “U” shaped trough, which contains an agitator shaft positioned down the length of the bowl. The purpose of the cylindrical-shaped vessel may be for operation under pressure or vacuum. The agitator spokes are intermittently