Spray drying nozzle
PNR

In any dryer good mixing and efficient liquid-gas contact are of basic importance to assure rapid drying. The height of the dryer system is largely determined by the time required to dry the largest particle produced by the atomizer, while other important parameters are represented by the inlet-air temperature and the properties of the product being processed.
Spray drying has several advantages, the main one being the ability to handle heat-sensitive products such as food and pharmaceuticals. This is due to the fact that the drying process of a drop happens by loosing water on the external layers, and this keeps the inside material in the drop cool or at least protected against excessive heat.