Spray drying is one of the mildest drying processes known today. The average retention time of a spray dried particle in a spray dryer will be less than a second (25,000 m3/hour of air entering a 80 m3 drying chamber). Spray drying is also the most common technology today for the production of microcapsules (> 90%).
Spray drying process. From left to right: combustion chamber, drying chamber, two cyclones for the separation of air and dried product, bag air filter.