Central to all spray dyers is the design of the chamber. The design of the chamber depends mostly on the heat sensitivity of the product, type of atomisation and residence time (the time taken to remove moisture from the particle as it falls down the chamber).

Other factors that can be considered is the KST value of the product, the higher the figure the more chance there is of an explosion.

The type of atomisation employed has a big impact on the chamber design.

The feed is atomised directly into the hot air stream for prolonged exposure to the hot air.

Once atomised the material progresses down the chamber exiting from the base of the unit.