Rotor for increasing mixing efficiency in a medium consistency mixer
AssigneeKamyr, Inc.
InventorThomas R. Delcourt
Life of this patent
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Abstract
Medium consistency (e.g. about 5-18%) paper pulp is mixed with a treatment fluid by fluidizing them while subjecting them to a constantly changing shear field in radial and axial planes. This is accomplished by providing a mixer rotor having a constantly varying cross-section along a dimension of elongation. The rotor may comprise a body having an external surface simulating alternately oriented cone frustums along its axis of rotation, with vanes connected to the external surface and including portions following the surface contour. A disk may or may not be provided at the end of the body connected to a shaft. A first interior housing portion has a configuration mimicking that of the rotor, while a second housing portion defines a fluidization zone with the disk.
Claims18
A rotor for a mixer comprising:
- an elongated body element having an axis and having an external surface shaped to simulate more than two contiguous cone frustums alternately oriented along the length of the body element, and defining an external contour;
- a plurality of vanes connected to said body element including portions thereof generally following the external contour of said body element from one cone frustum to another, said vanes being coplanar with said axis;
- and
- means for connecting said rotor to a shaft.
A rotor for a mixer comprising:
- an elongated metal body element having an axis, and having a continuous external surface with a continously varying cross-sectional area along a major portion of said body element along said axis, and defining an external contour;
- a plurality of vanes connected to said body element including portions thereof generally following the external contour of said body element, said vanes being coplanar with said axis;
- means for connecting said rotor to a shaft;
- and
- a disk disposed in a plane perpendicular to said axis of said body element, said disk disposed adjacent said means for connecting said rotor to a shaft.
Dependencies are inferred from the claim text.