Recirculating batch ers are loaded with a batch of wet paddy. The paddy is recirculated within dry After drying is the dryer during the entire drying procoss. completed, the paddy is unloaded and the dryer is ready for another batch. Most recirculating dryers are portable and can be movcd easily(Fig. 2.12).
The recirculating batch-in-bin dryers use a large airflow rate per ton of paddy fast drying capacity and a much higher drying air temperature of 60-80 c. It gives and is effective only because of the continuous movement of the paddy during the short drying time. Drying capacity is higher, but a considerably larger investment is required. operating costs tend to be slightly higher on this type than in the small batch dryer because of many moving parts and conveying equipment.