Andritz Inc.

Long Nguyen

Luc Gingras

Yves Raymond

Arvind M Singhal

Tom Berger

This disclosure relates to refiner plate segments having feeding grooves having a first width at a first end of the feeding groove, wherein the first end of the feeding groove is disposed closer to an inner diameter of the refiner plate segment, and a second end of the feeding groove having a second width, wherein the second end of the feeding groove is disposed closer to the outer diameter than the first end and wherein the second width is less than the first width. It is believed that the increased width of the feeding groove at the inner diameter, coupled with the change in angle or curve of the feed groove from a feeding angle to a holding angle such that the centrifugal force applied to the lignocellulosic material surpasses the plugging force, allows for improved hydraulic capacity over the refiner plate segment without reducing refining efficiency.

Refiner plate segments having feeding grooves

Refiner plate elements for a conical mechanical refiner include: a rotor plate element including at least one rotor plate segment having a feedstock inlet opening disposed at a first end of the rotor plate segment; and a rotor plate segment refining area disposed between the feedstock inlet opening and a second end of the rotor plate segment. The refiner plate elements may further include: a stator plate element including at least one stator plate segment having a stator plate segment refining area; and first and second attaching rails configured to couple to the stator plate segment to a stator support frame of the conical mechanical refiner. A separation between the first attaching rail and the second attaching rail that is not covered by the stator plate segment is configured to form a feedstock outlet opening.

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Hughesville, PA, United States of America

Long Nguyen