A typical industrial spray drying unit consists of a large drying chamber, feed atomizer, hot air supply and dry product recovery/dust collection system. Spray drying involves the atomization of a liquid feedstock into a spray of droplets and contacting the droplets with hot air in a drying chamber. The sprays are produced by either rotary (wheel) or nozzle atomizers. Evaporation of moisture from the droplets and formation of dry particles proceed under controlled temperature and airflow conditions. Powder is discharged continuously from the drying chamber. Manufacturers of industrial spray dryers include Niro, Drytec, Anhydro, Buchi and many more.
Used Niro Spray Dryer, built by Niro, 2007, Type VSD 12.5 R/N, Drying capacity 20-100kg/hr water evaporation, Max feed input 120kg/hr, Drying air rate at 200degC inlet temp: 1250kg/hr, Rotary Atomizer with standard wheel, Drying Chamber 2500mm x 2000mm / cone 60degC, inside sheeting of 316 Stainless Steel, cladding of 304 Stainless Steel. Previously used on Bio Polymer.