公开(公告)号：US20230302384A1

公开(公告)日：2023-09-28

申请号：US18204839

申请日：2023-06-01

Applicant: Andritz Inc.

Inventor： Lindsay Brandino Rawls ,  Todd S. Grace

IPC: B01D33/74 ,  B01D33/067 ,  B01D33/073 ,  D21C9/18

CPC classification number: B01D33/742 ,  B01D33/067 ,  B01D33/073 ,  B01D33/745 ,  D21C9/18 ,  B01D2201/282 ,  B01D2201/204

Abstract: A rotary drum filter includes a drum shell configured to rotate through a slurry, the drum shell having areas defining a plurality of drainage holes, at least one divider plate a first end and a second end, the at least one divider plate disposed on an outer surface of the drum shell and extending longitudinally and laterally along the drum shell, the first end being disposed near a drainage hole, and a filter medium disposed on one or more grids that are disposed on the outer surface of the drum shell above the at least one divider plate. The at least one divider plate is configured to direct filtrate on the outer surface of the drum shell filtered through the filter medium into the drainage hole.

公开(公告)号：US11739478B2

公开(公告)日：2023-08-29

申请号：US17883588

申请日：2022-08-08

Applicant: ANDRITZ INC.

Inventor： John Phillips

IPC: D21C11/12 ,  D21G9/00 ,  G01N29/02

CPC classification number: D21C11/122 ,  D21G9/0009 ,  G01N29/02

Abstract: A disruptor adjustment system comprising: a disruptor assembly configured to disrupt a volume of smelt flowing from a smelt spout into a dissolving tank, wherein the disruptor assembly comprises an actuator operatively engaged to a disruptor, a sensor configured to record process data from the recovery boiler; and a control system configured to receive a sensor output signal from the sensor, wherein the sensor output signal indicates the process data at a measured time, wherein the control system is further configured to compare the sensor output signal to a programmed operation range, and to send a disruptor input signal to the disruptor assembly to adjust a disruptor operating condition if the process data of the sensor output signal is outside of the programmed operation range. In certain exemplary embodiments, the sensor is an image capture device. In certain exemplary embodiments, the disruptor assembly can be adjusted remotely.

公开(公告)号：US20220034034A1

公开(公告)日：2022-02-03

申请号：US17451027

申请日：2021-10-15

Applicant: ANDRITZ INC.

Inventor： Luc Gingras

IPC: D21D1/00 ,  B02C7/12 ,  D21C5/02 ,  D21D1/30

Abstract: A disperser apparatus includes: a first disperser assembly configured to rotate around an axis; and a second disperser assembly facing the first disperser assembly. The first and second disperser assemblies each have a plurality of disperser-refiner plate segments annularly arranged. Each of the disperser-refiner plate segments includes a substrate having teeth extending from the substrate and arranged in rows disposed at radial intervals defining a dispersion section. Each tooth has a tooth height; and walls; and edges at junctions of adjacent walls. Each of the disperser-refiner plate segments further includes a refining section of refiner bars extending from the substrate, wherein adjacent refiner bars and the substrate define a groove between the adjacent refiner bars; and a plurality transition bars disposed between radially outermost teeth and the refining section.

公开(公告)号：US20220034031A1

公开(公告)日：2022-02-03

申请号：US17451660

申请日：2021-10-21

Applicant: ANDRITZ INC.

Inventor： Luc Gingras

IPC: D21C5/02

Abstract: A plate segment includes: a substrate having a front side and a back side, wherein the back side is configured to be mounted to a support disc of a disperser; and rows of teeth protruding from the front side of the substrate. The rows of teeth are arranged along an arc extending from a first lateral side of the plate segment to an opposite lateral side of the plate segment. A first tooth in the rows of teeth has a first tooth face. A buttress extends from the first tooth face to a face of an adjacent tooth. The buttress has a concave profile at a height above the substrate less than a full height of the teeth.

公开(公告)号：US11226095B2

公开(公告)日：2022-01-18

申请号：US16747174

申请日：2020-01-20

Applicant: Andritz Inc.

Inventor： John Phillips ,  David Watson

IPC: F23L13/02 ,  F23L9/00 ,  F23L13/00 ,  F24F140/40 ,  F23J3/00

Abstract: A method is provided for controlling airflow into a furnace that employs a velocity type damper. In one embodiment, the method for controlling airflow may include engaging a velocity type damper to an air port opening of a furnace. The velocity type damper includes at least one air controlling surface that is positioned proximate to a wall of the furnace at the air port opening so that air velocity exiting the at least one air controlling surface is substantially equal to the air velocity entering the air port opening to the furnace. The method may further include adjusting a cross sectional area through the velocity type damper to control air velocity into the furnace through the air port opening.

公开(公告)号：US11208763B2

公开(公告)日：2021-12-28

申请号：US16656721

申请日：2019-10-18

Applicant: Andritz Inc.

Inventor： Luc Gingras

IPC: D21C5/02

Abstract: Dispersers and disperser plate segments configured to be mounted in dispersers, wherein the disperser plate segments comprise rows of teeth and wherein bridges span gaps between adjacent teeth in at least one of the rows of teeth, wherein the bridges are separated from a substrate of the front face by an open space in the gap. In other exemplary embodiments, a buttress extends from at least one face of the tooth to support the tooth.

公开(公告)号：US11083985B2

公开(公告)日：2021-08-10

申请号：US15874141

申请日：2018-01-18

Applicant: Andritz Inc.

Inventor： Walter E. Nellis

IPC: B01D29/64 ,  D21C11/06 ,  B01D46/24 ,  B01D46/00 ,  D21C9/02

Abstract: A vapor relief strainer cleaning assembly comprises a turbine and dislodger assembly, wherein the turbine is configured to move a dislodger assembly disposed within a vapor screen relief vessel. Exemplary dislodger assemblies are configured to be powered by vapor or gas and to use excess vapor or gas optionally to dislodge non-condensable contaminants from the filter screen or to facilitate contaminant dislodgement from the inner wall of the filter screen.

公开(公告)号：US20210180253A1

公开(公告)日：2021-06-17

申请号：US17081693

申请日：2020-10-27

Applicant: Andritz Inc.

Inventor： Luc GINGRAS ,  Marc Berger

IPC: D21D1/30 ,  B02C7/12

Abstract: A refiner disc including: a refining zone on a front face of the disc; refining bars in the refining zone; and grooves between the bars, wherein each of the grooves include a rotational inducement element arranged on at least one sidewall of the groove and the rotational inducement element is configured to impart at helical flow of feed material flowing through the groove.

公开(公告)号：US20210086189A1

公开(公告)日：2021-03-25

申请号：US17027247

申请日：2020-09-21

Applicant: Andritz Inc.

Inventor： Luc Gingras ,  Marc Berger

IPC: B02C7/12 ,  D21D1/30

Abstract: This disclosure relates to an apparatus for a counter-rotating mechanical refiner configured to mitigate the problems of feeding variations, load variations, high energy consumption due to poor feeding efficiency, low pulp quality, and reduced throughput capacity by positioning a flinger proximate to a rotor gap side of a first rotor, wherein the first rotor further comprises an inlet extending through the first rotor, such that a portion of the operational flinger deflects feed material from the inlet into the refiner gap while rotating in the direction of the first rotor.

公开(公告)号：US20200283953A1

公开(公告)日：2020-09-10

申请号：US16884296

申请日：2020-05-27

Applicant: ANDRITZ INC.

Inventor： Antti LUUKKONEN ,  Christian RADHUBER

IPC: D21C3/26 ,  D21C3/00 ,  D21C7/06

Abstract: A system and process of producing pulp from lignocellulosic material after the lignocellulosic material has undergone compression (pressurization), maceration and removal of extractives produced during compression and maceration followed by chemical addition, fiberization, digestion (cooking) and further mechanical refining.