公开(公告)号：US12195917B2

公开(公告)日：2025-01-14

申请号：US17925478

申请日：2021-05-24

Applicant: Valmet Technologies Oy

Inventor： Naveen Chenna ,  Tero Juutilainen

IPC: D21C11/08 ,  B01D53/58 ,  D21C11/06

Abstract: A method for removing ammonia (NH3) from a gas produced in a pulp mill (100). The method comprises producing raw non-condensable gas comprising ammonia (NH3) in the pulp mill (100) and transferring at least some of the raw non-condensable gas to a scrubber (200) containing aqueous scrubbing solution (130, 140). The method comprises adding a compound capable of decreasing a pH of the scrubbing solution to the scmbbing solution (130, 140) and in the scrubber (200), contacting the raw non-condensable gas with the scmbbing solution (130, 140), to react the ammonia (NH3) of the raw non-condensable gas with the scmbbing solution to produce clean non-condensable gas and ammonium (NH4+). A pulp mill comprising equipment for performing the method.

公开(公告)号：US20240410111A1

公开(公告)日：2024-12-12

申请号：US18688987

申请日：2022-11-24

Applicant: Valmet Technologies Oy

Inventor： Tuomo Aho ,  Juha Pousi

IPC: D21D5/02 ,  D21D1/00

Abstract: Textile fibers of different lengths are fractionated in a liquid medium at a predetermined consistency into at least two fractions on the grounds of the fiber length, the two fractions being a first accept and a second accept. The second accept, which has longer fibers than the first accept, is led to a refining step in the liquid medium, and the refined fibers are fractionated in the liquid medium into at least two fractions on the grounds of the fiber length.

公开(公告)号：US20240400329A1

公开(公告)日：2024-12-05

申请号：US18677231

申请日：2024-05-29

Applicant: Valmet Technologies Oy

Inventor： Jaakko HAAPANEN ,  Mikko RÄMÄ

IPC: B65H19/18 ,  B65H23/04

Abstract: The invention relates to a method and an unwinding section for unwinding a fiber web from a parent roll, which unwinding section comprises at least one unwinder for unwinding a fiber web from a parent roll and a joining device configured to join a trailing end of a running-out parent roll to a beginning end of a next, new parent roll to be unwound in a parent roll change. The unwinding section comprises a broke handling device configured to handle broke. The unwinding section comprises a tensioning device located between the joining and the broke handling, and the tensioning device is configured to tension and straighten the fiber web to be joined between the tensioning device and the joining device before joining of the end of the fiber web from the running-out parent roll and the end of the fiber web from the next parent roll to be unwound.

公开(公告)号：US12091819B2

公开(公告)日：2024-09-17

申请号：US17115303

申请日：2020-12-08

Applicant: Valmet Technologies Oy

Inventor： Juha Aronen

IPC: D21D1/00 ,  B02C7/02 ,  B02C7/14 ,  B02C7/16 ,  D21D1/24 ,  G01H1/00

CPC classification number: D21D1/002 ,  B02C7/02 ,  B02C7/14 ,  B02C7/16 ,  D21D1/24 ,  G01H1/00

Abstract: An arrangement and a method for adjusting a blade gap in a refiner. The arrangement comprises at least one loading device arrangeable to move at least one refining element of the refiner in respect of at least one another refining element of the refiner for adjusting the blade gap between the refining elements, at least one vibration measuring device for measuring a vibration of the refiner in operation, and at least one control unit configurable to adjust the blade gap between the refining elements by controlling the at least one loading device to move the at least one refining element in respect of the at least one another refining element based on the measured vibration of the refiner.

公开(公告)号：US20240288158A1

公开(公告)日：2024-08-29

申请号：US18436728

申请日：2024-02-08

Applicant: Valmet Technologies Oy

Inventor： Pekka LEHTONEN ,  Tero LUOMAHARJU ,  Pasi YLI-HEMMINKI

IPC: F23C10/12 ,  F22B31/00 ,  F22B37/10

CPC classification number: F23C10/12 ,  F22B31/0023 ,  F22B37/108

Abstract: A wall (200) for a fluidized bed boiler (300). The wall (200) comprises a first heat exchanger pipe (110) comprising a first primary portion (111) and a first secondary portion (112), and a second heat exchanger pipe (120) comprising a second primary portion (121) and a second secondary portion (122). A first gap (221) is arranged between the first secondary portion (112) and the second secondary portion (122), and at least a part of the first secondary portion (112) and at least a part of the second secondary portion (122) extend straight, in parallel, and within an imaginable plane (P). The wall (200) is configured such that particulate material is able to propagate through the first gap (221) from a first side (S1) of the plane (P) to the opposite second side (S2) of the plane (P). The wall (200) comprises a refractory (230) arranged on at least one side of a part of the first secondary portion (112) and a part of the second secondary portion (122). A fluidized bed boiler comprising the wall (200).

公开(公告)号：US12053786B2

公开(公告)日：2024-08-06

申请号：US18000068

申请日：2020-07-03

Applicant: Valmet Technologies Oy

Inventor： Jan Backman ,  Ralf Backvik ,  Roger Becker ,  Allan Carlsson ,  Valentina Kucher ,  Morgan Persson ,  Felix Spegel ,  Jonas Sundin ,  Bengt Eriksson

IPC: B04C5/081 ,  B04C9/00

CPC classification number: B04C5/081 ,  B04C2009/008

Abstract: A hydrocyclone having a mid-section having a longitudinal axis and a radius, and a fluid injection member releasably connected to the mid-section. The fluid injection member has a dilution passage therethrough and two spaced apart dilution ports, at least one dilution port being at an angle between 15 and 75 degrees relative to the mid-section radius. The injection member comprises a nozzle housing releasably connected to the mid-section, the nozzle housing having a dilution passage therethrough, and a nozzle adapted to be connected to the nozzle housing, the nozzle being planar and having at least one dilution port therethrough, the nozzle being receivable within the dilution passage.

公开(公告)号：US20240181670A1

公开(公告)日：2024-06-06

申请号：US18285482

申请日：2022-04-01

Applicant: Valmet Technologies Oy

Inventor： Tommi Honkanen

IPC: B27L1/02

CPC classification number: B27L1/025

Abstract: A debarking drum (1) for the debarking of wood (2) has an essentially horizontal cylindrical drum (10) supported to revolve around its longitudinal axis. The drum has a first end (12) and a second end (14) with an inner surface with inwardly projecting longitudinally extending debarking iron sections (16). Bark openings or slots (20) extend through the drum inner surface (18) and multiple rigid studs (22) protrude inwardly from the inner surface (18) and are positioned between the debarking iron sections (16). The studs operate to break the bark (3) of the wood (2) for debarking. The studs (22) are positioned along a partial length (L) of the drum (10) between the first end (12) and the second end (14). The invention also relates to a method and system for the debarking of wood by the debarking drum.

公开(公告)号：US11970352B2

公开(公告)日：2024-04-30

申请号：US17668279

申请日：2022-02-09

Applicant: Valmet Technologies Oy

Inventor： Arto Leskinen

IPC: B65H27/00 ,  D21G1/02

CPC classification number: B65H27/00 ,  D21G1/02 ,  B65H2301/4148 ,  B65H2403/7254 ,  B65H2555/13

Abstract: A brake is provided for an idler roll (10) of a fiber web machine, in particular of a slitter-winder, which idler roll (10) has an outer shell surface (13). The brake (20) is located outside the outer shell surface (13) of the idler roll (10) in close vicinity of the idler roll (10) in a non-contacting position. The brake (20) has a permanent magnet (25), which is configured to be moved from non-braking position to a braking position and vice versa by an actuator or cylinder (35, 45).

公开(公告)号：US11952452B2

公开(公告)日：2024-04-09

申请号：US17956350

申请日：2022-09-29

Applicant: Valmet Technologies Oy

Inventor： Vesa-Matti Riihioja

IPC: C08F283/00

CPC classification number: C08F283/006

Abstract: A process produces a body of a belt (10) for a paper, board, pulp or tissue machine, the body having an inner surface and an outer surface. The process includes producing a modified polyurethane by adding a polydialkylsiloxane having at least one functional group to a manufacturing process of a polyurethane in order to obtain the modified polyurethane, which modified polyurethane is a polyurethane matrix having a covalent bond with the polydialkylsiloxane, and forming the body of the belt, wherein the body is the modified polyurethane. The belt (10) is for a paper, board, pulp, or tissue machine, or for a shoe press and a sleeve roll.

公开(公告)号：US11835298B2

公开(公告)日：2023-12-05

申请号：US17704632

申请日：2022-03-25

Applicant: Valmet Technologies Oy

Inventor： Pekka Lehtonen

IPC: F28D13/00 ,  F22B31/00 ,  F23C10/10 ,  F28F9/22

CPC classification number: F28D13/00 ,  F22B31/0084 ,  F23C10/10 ,  F28F9/22 ,  F23C2206/103

Abstract: A heat exchanger (10) suitable for recovering heat from bed material of a fluidized bed boiler (1). The heat exchanger (10) comprises first and second heat exchanger tubes (810, 820) and first and second feeding chambers (310, 320) configured to supply bed material to the first and second heat exchanger tubes (810, 820), respectively. The first heat exchanger tubes (810) are arranged on a first side of a plane (P) that intersects the first feeding chamber (310) and the second heat exchanger tubes (820) are arranged on a second side of the plane (P). The first feeding chamber (310) is configured to supply bed material to the second feeding chamber (320).