Conversion of liquids containing dissolved or suspended solids into powder form of required specifications, by evaporation of liquids, takes place in a spray dryer. Spray drying is a highly efficient drying method with possibility to have close control over the particle size, bulk density and moisture content of the dried powder.

Conversion of liquids containing dissolved or suspended solids into powder form of required specifications, by evaporation of liquids, takes place in a spray dryer. Spray drying is a highly efficient drying method with possibility to have close control over the particle size, bulk density and moisture content of the dried powder. The spray drying process consists of atomisation of the liquid feed into fine droplets with the help of spray nozzle/s or rotating disc. These fine droplets are brought in contact with hot air in a suitably designed drying chamber. The liquid gets vaporised and the solid particles in dry form are collected at the bottom of the chamber. The fine particles which are carried by the air are separated either in cyclone separator or bag filter or wet scrubber.