Stator refiner plate element having curved bars and serrated leading edges

摘要

A refining system and process using a specially designed stator refiner plate that includes a major refining surface having a series of bars and grooves, the bars include a leading surface having an irregular surface hosting a series of protrusions extending along the bar, and a trailing surface that is relatively smooth compared to the leading surface that lacks an irregular surface.

主权项

1. A stator refiner plate for a mechanical refiner of lignocellulosic material comprising:
a stator refining surface affixed to a substrate; multiple bars and grooves situated on the stator refining surface, wherein a bar of the multiple bars comprises a leading sidewall and a trailing sidewall opposite the leading sidewall, and wherein the bar of the multiple bars has a feeding angle; an irregular surface on the leading sidewall; and multiple protrusions extending from the irregular surface of the leading sidewall of the bar of the multiple bars toward a trailing sidewall on an adjacent bar; wherein the irregular surface and multiple protrusions comprise at least 25% a length of the leading sidewall; wherein the bar of the multiple bars is curved with respect to a radial line extending through the stator refiner plate to define the feeding angle, and wherein the feeding angle increases continuously and gradually along a radially outward section of the stator refining surface, and wherein the feeding angle of the bar of the multiple bars disposed in the radially outward section increases 10 degrees to 15 degrees in the radially outward section.