公开(公告)号：US20230081586A1

公开(公告)日：2023-03-16

申请号：US17801124

申请日：2021-03-03

Applicant: Andritz Inc.

Inventor： Keith Vogel ,  Tyson B. Hunt ,  Blake Whiteside ,  Carlton L. Luhrmann ,  Scott A. Pope ,  Aaron Leavitt

IPC: D21C3/22 ,  D21C7/00

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, that adjust a high-pressure feeder of a feed system used in pulp production based on the fluid leakage through a low-pressure outlet of a high-pressure feeder. Methods can include obtaining multiple flow values, including (1) a make-up liquor flow value, (2) a black liquor flow value, (3) a white liquor flow value, (4) a chip chute circulation flow value, and (5) a high pressure feeder purge flow value. Methods can include determining a chip flow value specifying a flow of chips provided to the high-pressure feeder. Based on the flow values, methods can determine a fluid leakage value specifying an amount of fluid leakage through a gap between a pocket rotor and the housing of the high pressure feeder. Methods can adjust an annular gap based on the fluid leakage value satisfies a threshold leakage value.

公开(公告)号：US20240240401A1

公开(公告)日：2024-07-18

申请号：US18096789

申请日：2023-01-13

Applicant: ANDRITZ INC.

Inventor： Tyson B. Hunt ,  Grant Bechard ,  Spencer Williams ,  Keith Vogel ,  Jeff Williams

IPC: D21C9/04 ,  F16C29/02

CPC classification number: D21C9/04 ,  F16C29/02 ,  F16C33/20

Abstract: A bearing for guiding reciprocating vertical movement of a pressure diffuser screen assembly may include: a bearing cylinder; a screen extension having an upper portion configured to couple to a lower portion of the pressure diffuser screen assembly, the screen extension having a screen extension outer diameter less than a pressure diffuser screen assembly outer diameter and less than an inner diameter of the bearing cylinder; and a bearing assembly configured to couple to the screen extension at a lower portion of the screen extension, the bearing assembly having a bearing assembly inner diameter corresponding to the screen extension outer diameter and a bearing assembly outer diameter corresponding to the inner diameter of the bearing cylinder. An inner diameter of the bearing cylinder may provide a bearing surface for the bearing assembly.

公开(公告)号：US10207279B2

公开(公告)日：2019-02-19

申请号：US15337247

申请日：2016-10-28

Applicant: Andritz Inc.

Inventor： Tyson B. Hunt ,  Alexandre David

IPC: B04C5/181 ,  B04C5/04 ,  B04C5/085 ,  D21C11/00 ,  D21D5/24 ,  D21F1/62

Abstract: A perforated replaceable insert for a sand separator vessel in a digester feed system where the perforations have at least a width and a length. The perforations are aligned columns and rows, with the columns being positioned to be parallel to a line formed by the tangent of the conical axis.