Patent ID: 6449869
Filing Date: 2002-09-17
Classification: A01C,A23P,B01F,B01J

Abstract:
A device for drying pourable products comprising a rotor chamber (1), a rotor (4) defining a vertical rotor axis (3) mounted within said rotor chamber, said rotor (4) having a central horizontal surface and, at least in its radially outer third, the shape of a conical shell (22) with an outward and upward inclination to the rotor axis (3) of between 20Â° to 70Â°, such that an end face of the conical shell (22) lies vertically above the central horizontal surface, said conical shell (22) having, at least partially, drying gas passages in the form of perforations or screens, wherein said rotor chamber (1) includes an axially extending cylindrical wall (6), a plurality of guide vanes ( 11) being affixed statically on said wall and above said rotor (4), said guide vanes (11), in cross section to the rotor axis (3), having substantially the shape of a segment of a circle or spiral, the outer ends of said guide vanes emerging tangentially from the wall (6) of the rotor chamber (1) in the direction of rotation of the rotor (4), the tangents of the wall (6) and the guide vanes (11), at the point where the guide vanes emerge from the wall (6), having substantially the same inclination, said guide vanes having inner ends which lie approximately above the middle part of the rotor radius such that the circulating product, which leaves the rotor (4) under the influence of kinetic energy, rolls on an inside surface of the guide vanes (11) and falls back onto the rotor (4).