Pharmaceuticals: Efficient cyclone systems for fine particle collection

The optimised design of gas cyclones is of particular relevance for the recovery of highly valuable products, such as in the production of active pharmaceutical ingredients (API) through drying systems such as spray or fluid bed drying [1]. Traditionally, these have been captured with reverse flow gas cyclones, but fine and low density particles remain difficult to capture [2]. Bagfilters, although highly efficient, are to be avoided due to possible contamination problems and filter product hold-up.