*3.4.1.1 Superheated steam spray drying*

Although superheated steam drying was proposed one century ago, the potential of superheated steam like a drying medium was not exploited industrially for half a century. The advantages of this type of drying are reviewed by [52] as follows:


When the constraints could brief to the following:


The initial scheme of a superheated steam spray dryer was made by Gauvin [53, 54]. The patent on superheated steam spray drying was issued by Raehse and Bauer [55]. This drying has been examined using the CFD system by Frydman et al. [56].
