Water relief groove to prevent cavitation of opposite refiner plate

Abstract

This disclosure relates to a refiner plate segment, mechanical refiners, and methods to manufacture a refiner plate segment having one or more water channels disposed in a variable substrate profile along the radial length of a refiner plate segment base and disposed between the refiner plate segment inlet and the primary refining section, wherein the variable substrate profile comprises an undulating curve configured to complement a second undulating curve on an opposing refiner plate, and wherein dimensions of the one or more water channels are sufficiently narrow to prevent wood chips fromentering the water channels and sufficiently wide to provide a bypass path for the free water.

Description

[0001] related application [0002] This application claims the benefit under 35 U.S.C. §119(e) of the earlier filing date of U.S. Provisional Patent Application No. 62 / 599,127, filed December 15, 2017, the entire contents of which are hereby incorporated by reference. technical field [0003] The present disclosure relates generally to refiners for lignocellulosic material, and more particularly to refiner plate segments for refiners. Background technique [0004] Mechanical pulp refiners usually separate, develop and cut lignocellulosic materials into fibers to impart certain mechanical and physical properties to the fibers, suitable for pulp, paper, cardboard, construction materials, packaging materials, liquid-absorbent filling materials and other products. [0005] Mechanical refiners typically include two or more opposing refiner assemblies. Each component has a raised finishing rib pattern on the refining side. Grooves separate adjacent refining edges. Typically, ...

AI Technical Summary

Problems solved by technology

This problem leads to a significant reduction in the service life of the refiner plate segments

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