Drying is a process of removing the moisture from the solids by evaporation, which is crucial if we want to extend the shelf-life of the products. Spray drying is special drying method, where raw material in liquid form come into contact with hot gases, typically air to form powdered product. The first spray dryer was developed in the early 1900s, however wide application of this method on industrial scale started during World War II when it was needed to improve transportation of food and other materials. Nowadays spray drying is a mature technique which has found application in chemical, food and pharmaceutical industry.