Engineering Aspects of Roller Drier,Spray Drier,Fluid Bed Drier and Try Drier

On an industrial scale, milk is commonly dried by application of roller drying or spray drying. There are various modifications of both systems. Atmosphere roller drier or drum drier was first introduced in 1855 in Great Britain and was most popular drying process till the middle of 20th century. Vacuum drum driers were

designed between 1889-1909 in Ekenbery (Sweden), Passburg (Germany) and Govers (USA). Roller drying with two rolls, invented in 1902 by John A. Jost of USA, was the first method used for drying milk and milk products. Spray drying process was developed during the early part of this century. Because of its relative advantages over roller drying process, spray-drying process has now almost completely replaced roller drying for the production of milk powder.