Prediction of residence time in rotary dryers is useful for equipment design as . and soya meal, sawdust) and from mineral origin (sand) in a pilot rotary dryer. Chat Online Drytech Engineering .
Spray dryers for the manufacture of milk products can be operated with an airinlet temperature of the order of 200°C since the residence time of particles in the drying chamber is very short, of the order of 20s or less. Nevertheless, it is sometimes necessary to dry thermolabile materials under vacuum to reduce process temperatures.