公开(公告)号：US20030201080A1

公开(公告)日：2003-10-30

申请号：US10428760

申请日：2003-05-05

Applicant: Andritz Inc.

Inventor： Jay K. Sheerer

IPC: D21C003/26 ,  D21C007/06 ,  D21C007/08

CPC classification number: D21C7/06

Abstract: The flow of a liquid slurry of comminuted cellulosic fibrous material (e.g. wood chips) in a vertical vessel is made more uniform by providing a plurality of vertically spaced sets of either substantially continuous or discontinuous protrusions which extend inwardly from the internal surface of the vessel a maximum distance of between about 2-12 inches. A preferred vessel is a continuous or batch digester. The protrusions may have an arcuate, rectangular, isosceles or scalene triangular, right triangular, or trapezoidal cross-section, and may be spaced from each other vertically between about 1-12 feet, and have a height of between about 1-3 feet. Discontinuous protrusions have a preferred arcuate spacing of between 1-10 feet.

公开(公告)号：US20020069992A1

公开(公告)日：2002-06-13

申请号：US10073211

申请日：2002-02-13

Applicant: Andritz Inc.

Inventor： Jay K. Sheerer

IPC: D21C007/06 ,  D21C007/04

CPC classification number: D21C7/06

Abstract: The flow of a liquid slurry of comminuted cellulosic fibrous material (e.g. wood chips) in a vertical vessel is made more uniform by providing a plurality of vertically spaced sets of either substantially continuous or discontinuous protrusions which extend inwardly from the internal surface of the vessel a maximum distance of between about 2-12 inches. A preferred vessel is a continuous or batch digester. The protrusions may have an arcuate, rectangular, isosceles or scalene triangular, right triangular, or trapezoidal cross-section, and may be spaced from each other vertically between about 1-12 feet, and have a height of between about 1-3 feet. Discontinuous protrusions have a preferred arcuate spacing of between 1-10 feet.