摘要:
An installation for continuously treating a granular or powdered product. The installation includes at least one microwave applicator which is connected to a generator by a coupling device. The installation further includes a dielectric duct which has an axis and an internal surface. The dielectric duct passes through the applicator and contains a rotating metal screw for conveying the granular or powdered product therethrough. This is accomplished by constructing the screw so that it includes at least one helically wound wire which extends longitudinally through the duct at a radial distance from the axis of the duct and proximate the internal surface of the duct. An annular clearance is thereby defined between the wire and the internal surface of the duct.