公开(公告)号：US20230071986A1

公开(公告)日：2023-03-09

申请号：US17867445

申请日：2022-07-18

Applicant: Valmet Technologies Oy

Inventor： Tuomo AHO ,  Juha-Pekka HUHTANEN

IPC: D21D1/34 ,  D21H11/18 ,  D21D5/02

Abstract: A system and method of producing MFC (micro fibrillated cellulose), which system comprises at least one refiner. The refiner comprises a mechanism for refining the stock in at least two refining stages, advantageously at least two refiners for refining the stock in at least two refining stages, and that the refiners comprise a number of refining bars. The refining bars have width of 0.5-2.0 mm, height less than 7 mm and groove width of 0.5-3 mm. The method comprises at least two refining stages, in which the pulp stock is refined in at least one refining stage in consistency of 3-5%, and the method comprises at least one screening stage in at least one screen in consistency of 0.5-5%.

公开(公告)号：US11585046B2

公开(公告)日：2023-02-21

申请号：US16907038

申请日：2020-06-19

Applicant: Valmet Technologies Oy

Inventor： Jari Jännetyinen

IPC: D21F7/00

Abstract: A belt installation device for installing a belt onto a paper machine, pulp machine or board machine, has a first area (4) with an attaching point (5) for attaching the belt installation device to a pulling member, a second area (6) with at least one aperture (7, 7a, 7b, 7c, 7d) for fastening the belt installation device (1) removably to a belt, and a central area (8) between the first area (4) and the second area (6), wherein a pull strength of the attaching point is at least 300 kgf and equal or less than 900 kgf. The belt installation device is bendable between a straight form and a curved form having a radius of curvature of 800 mm. This invention further relates to an installation arrangement and installing method for installing a belt onto a paper, pulp or board machine.

公开(公告)号：US20220396916A1

公开(公告)日：2022-12-15

申请号：US17613055

申请日：2020-05-22

Applicant: Valmet Technologies Oy

Inventor： Tuomo Kälkäjä ,  Antti Haapala

IPC: D21C9/00 ,  D21H11/18

Abstract: A pulp treating arrangement (10) has a pulp treating apparatus (100), which receives a first pulp (150) which including at least one of virgin pulp (152) and recycled pulp (154). The arrangement performs a processing of fines of the first pulp (150), and outputs a second pulp (160) having a modified percentage of fines on the basis of the processing and provides a micro-/nanocellulose process arrangement (104) with the second pulp (160).

公开(公告)号：US20220396445A1

公开(公告)日：2022-12-15

申请号：US17838193

申请日：2022-06-11

Applicant: Valmet Technologies Oy

Inventor： Arto LESKINEN ,  Mikko RÄMÄ

IPC: B65H19/18 ,  B65H21/00

Abstract: A joint and device for joining ends of at least two fiber webs together, the joint being formed of at least one cut provided to penetrate through the ends of the fiber webs in an overlapping position, which cut has at least one side part and from the side part extending at least one substantially straight part and which cut, which forms at least one flap, being configured to remain attached to the fiber webs by at least one folding line substantially aligned with the direction of the movement of the fiber webs. The device comprises a tool with a cutting edge and a counter element with a groove and located on the opposite side of the fiber webs, and the tool protrudes into the groove. The groove has a greater cross-sectional area than the cross-sectional area of the tool such that a loose and spacey fitting is provided.

公开(公告)号：US11512431B2

公开(公告)日：2022-11-29

申请号：US16910242

申请日：2020-06-24

Applicant: Valmet Technologies Oy

Inventor： Juan Cecchini ,  Juha Kivimaa ,  Kari Lamminmäki ,  Antti Poikolainen

IPC: D21F11/04 ,  D21F9/00 ,  D21F9/02

Abstract: The invention relates to a method for forming a three-layer board web, preferably a folding box board (FBB) or a solid bleached (sulfate) board (SBS), in a forming section (300) comprising a multilayer headbox (100) and a forming unit (200). In the method the layers of the three-layer board web are first formed of pulp suspension in the multilayer headbox (100) and fed to only one forming unit (200), a gap former where the pulp suspension from the multilayer headbox is fed to a gap between lower and upper wires for water removal and for joining the layers of the three-layer board web and where water is first removed by a non-pulsating forming shoe (37, 39).

公开(公告)号：US11512430B2

公开(公告)日：2022-11-29

申请号：US17062321

申请日：2020-10-02

Applicant: Valmet Technologies Oy

Inventor： Rauno Enqvist

IPC: D21F7/12 ,  D21F1/00 ,  D03D15/00 ,  D03D1/00

Abstract: A dryer fabric has a weft of cross machine direction yarns (6) and a first warp of first machine direction yarns (5) and a second warp of second machine direction yarns (9). The yarns of the first warp are arranged above the yarns of the second warp on a first surface (FS) side. The first warp has primary yarns (51) of PPS or PK yarns whose breaking load remains substantially stable within 15 days in conditions where RH=100%, T=125° C. and p=2.3 bar; and secondary yarns (52) of PET with breaking loads which substantially decrease under the same conditions. At least every second yarn of the first warp is a secondary yarn (52). The secondary yarns (52) may be two out of three or three out of four of the first machine direction yarns (5). PET reduces cost and adds elasticity to the dryer fabric.

公开(公告)号：US11473243B2

公开(公告)日：2022-10-18

申请号：US16756781

申请日：2018-10-15

Applicant: Valmet Technologies Oy

Inventor： Rami Lampinen ,  Erkki Välimäki ,  Tuomo Hilli

IPC: D21C11/00 ,  D21C11/04 ,  F04F5/42

Abstract: A method for removing hydrogen sulphide ions (HS−) from a liquor (300) of a pulp mill process, the method comprising pumping the liquor (300) to an injector arrangement (710) using a pump arrangement (720) such that the pumping of the liquor (300) through a jet nozzle (115) generates suction at a gas inlet (130), whereby reagent gas (310) is mixed with the liquor (300), and letting out the treated liquor (300) from the injector arrangement (710) to a vessel (200). In this way, the liquor (300) is treated to form at least partly treated liquor (300). A corresponding use of an injector arrangement. A system for performing the method.

公开(公告)号：US20220267113A1

公开(公告)日：2022-08-25

申请号：US17668279

申请日：2022-02-09

Applicant: Valmet Technologies Oy

Inventor： Arto Leskinen

IPC: B65H27/00 ,  D21G1/02

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：US11377795B2

公开(公告)日：2022-07-05

申请号：US17264732

申请日：2019-12-17

Applicant: Valmet Technologies Oy

Inventor： Jari Jännetyinen ,  Vesa-Matti Riihioja

IPC: D21F3/02 ,  B30B9/24 ,  D21F7/08

Abstract: A shoe press belt (10) for a shoe press has an inner surface (11), an outer surface (12), an elastomer body and a support structure (20, 21, 22, 23) for the elastomer body. A plurality of parallel dewatering grooves (50, 50a, 50b) are on the outer surface (12) of the shoe press belt (10), with a ridges (53) provided between two adjacent dewatering grooves (50a, 50b). The dewatering grooves (50, 50a, 50b) have a first wall (60), a second wall (70), and a bottom (80) therebetween. At least the first wall (60) of the dewatering groove (50, 50a, 50b) has a plurality of parallel auxiliary grooves (100, 100a, 100b). A paper, board or pulp drying machine has said shoe press belt (10). A method for installing the shoe press belt (10) is provided.

公开(公告)号：US20220145537A1

公开(公告)日：2022-05-12

申请号：US17432458

申请日：2020-02-18

Applicant: Valmet Technologies Oy

Inventor： Petteri Vuorio ,  Håkan Sjöström

IPC: D21D1/30 ,  B02C7/12

Abstract: A processing plate (4, 12) for mechanically processing pulp. The plate has projecting parts (6, 7, 14, 15). The projecting parts (7, 15) comprise a radially inner part (28) having an inclined ascending wall (29) towards the outer periphery (23) of the plate and a radially outer part (30) having an inclined descending wall (31) towards the outer periphery (23) of the plate (4, 12). The inner and outer parts (28, 30) are radially coupled to each other by a ridge (32) along a coupling line (CL). The walls (29, 31) are mutually connected only partly so that they have in common only a crest section (40) of the ridge (32) which crest section (40) is less than a width of at least one of the wall (29) of the inner part (28) and the wall (31) of the outer part (30) at the coupling line (CL).