Refiner with spiral inlet and dual tangential discharge outlet
AssigneeAndritz Inc.
InventorsMichael Kraft, Julie Ruch
Life of this patent
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Abstract
A fibrous slurry refiner includes a casing, a rotor secured to a rotor shaft, and first and second pluralities of grinding surfaces. The rotor is disposed within the casing and is rotatable via the rotor shaft. The first plurality of grinding surfaces is secured to the rotor, and the second plurality of grinding surfaces is disposed facing the first plurality of grinding surfaces and fixed in the casing. An inlet plate for each of the plurality of grinding surfaces directs the fibrous slurry toward a set of facing first and second grinding surfaces and imparts a rotary flow to the fibrous slurry.
Claims8
A fibrous slurry refiner comprising:
- a casing;
- a rotor secured to a rotor shaft, the rotor being disposed within the casing and rotatable via the rotor shaft;
- a first plurality of grinding surfaces secured to the rotor;
- a second plurality of grinding surfaces disposed facing the first plurality of grinding surfaces and being fixed in the casing;
- and
- an inlet housing made up of an inlet plate, an axial cylinder and a spiral inlet opening for each of the plurality of grinding surfaces, each inlet plate directing the fibrous slurry toward a set of facing first and second grinding surfaces and imparting a rotary flow to the fibrous slurry,
- wherein the axial cylinder is substantially circular, wherein the spiral inlet opening is positioned tangentially relative to a center of inlet plate, and wherein the inlet housing comprises a spiral channel extending from the inlet opening to the center of the inlet plate.
Dependencies are inferred from the claim text.