Refiner plates with short groove segments for refining lignocellulosic material, and methods related thereto
AssigneeAndritz Inc.
InventorPeter ANTENSTEINER
Life of this patent
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Abstract
Refiner plate segments and refiner plates having fully dammed or partially dammed grooves on a major surface that may control flow behavior of lignocellulosic materials passing between refining plates in a refiner. The dammed grooves form groove segments, and each groove segment has a length of no more than about 30 mm or a subrange thereof.
Claims21
A dammed refiner plate segment for mechanically refining lignocellulosic material in a refiner having opposing refiner plates, the refiner plate segment comprising:
- at least one refining zone;
- multiple grooves in the at least one refining zone;
- and
- multiple full height dams in all or substantially all of the grooves;
- wherein the full height dams in all or substantially all of the grooves define groove segments between full height dams, the groove segments having a length of no more than about 30 mm.
A partially dammed refiner plate segment for mechanically refining lignocellulosic material in a refiner having opposing refiner plates, the refiner plate segment comprising:
- at least one refining zone;
- multiple grooves in the at least one refining zone;
- and
- at least two full height dams in at least one of the grooves;
- wherein the full height dams define groove segments between the full height dams, and each groove segment has a length of no more than about 30 mm.
A refiner plate for mechanical refining of lignocellulosic materials comprising:
- multiple refiner plate segments operatively attached to form a circular shape;
- wherein the refiner plate segments each comprise bars, grooves, and multiple full height dams in the grooves to define groove segments between two full height dams;
- and
- wherein at least one of the groove segments has a length of no more than about 30 mm.
A method of mechanically refining lignocellulosic material in a refiner having opposing refiner plates, the steps comprising:
- feeding lignocellulosic material into a refining gap between a set of opposing refiner plates through an inner edge of the refiner plates, wherein the set of refiner plates includes at least one refiner plate comprising at least one refiner plate segment, the refiner plate segment comprising at least one groove segment defined by two full height dams with a length of no more than about 30 mm.
- refining the lignocellulosic material between the set of refining plates;
- and
- receiving refined lignocellulosic material from an outer edge of the refiner plates.
A mechanical refiner to refine lignocellulosic materials having opposing refiner plates, the refiner comprising:
- a rotor refiner plate;
- and
- a stator refiner plate with a major surface opposing the rotor refiner plate;
- wherein one of the rotor refiner plate and the stator refiner plate comprises at least one refiner plate segment, and the refiner plate segment comprises at least one groove segment at a length of no more than about 30 mm.
Dependencies are inferred from the claim text.