ABSTRACT
Spray drying is by definition the transformation of a feed of
liquid or paste material (solution, dispersion, or paste) into
a dried particulate powder by spraying the feed into a hot
drying medium.[1,2] Spray drying can form a powdered
spherical product directly from a solution or dispersion.
The main advantages of spray drying over other drying
methods are rapid drying and minimal temperature
increase of the material. Every spray dryer consists of a
feed pump, an atomizer, an air heater, an air dispenser, a
drying chamber, and systems for exhaust air cleaning and
powder recovery, as shown in Fig. 1. There are large
variations in size, in detailed designs, including combina-
tions with other types of dryers and in the modes of opera-
tion depending on the large variety of materials to be
processed and product properties desired. Further, modern
spray drying systems are highly automated.
