A device (1) and a method for drying dialysis filters are provided. The device (1) has a drying chamber (2) and a microwave generating unit (3), which emits microwaves into the drying chamber (2). This allows effectuate rapid drying cost-effectively. The microwave generating unit (3) has a variable frequency and/or a variable power.

A device for drying granules, such as those made from a plastic material. The device can have a spiral arrangement of one or more rotor blades on a rotor to propel process fluid through a sieve and separate the process fluid from granules by having sieve openings of a size smaller than the granules. The device can also have a fan wheel and a hollow rotor shaft to create an air flow and improve separation and drying of granules. The device enables reliable automated drying of granules using less energy than prior art devices.