A conveyor drier is used to dry granular food product from an initial moisture content of 3 kg/kg dry solids to the critical moisture content which is 1 kg/kg dry solids. The drying air enters and flows countercurrent to the solids at a flow rate of 10000 kg dry air/hr at 120 C with a humidity of 0.015 kg/kg dry air. The conveyor belt is 1 m wide and is loaded with 100 kg feed/hr. The belt moves with a velocity of 1m/min. The mass transfer coefficient, kyMe, can be taken as 120 kg dry air/m2.hr. Calculate the length of the conveyor, L. Assume adiabatic drying. air flow granular feed stream heaters 15.1. ob f 1 oof foto screen belt O co dry products