公开(公告)号：US11174593B2

公开(公告)日：2021-11-16

申请号：US16074214

申请日：2017-01-25

Applicant: Valmet Technologies Oy

Inventor： Kati Mikkonen ,  Jorma Naamanka

IPC: D21F7/08 ,  D21F7/10 ,  D03D3/04

Abstract: The invention relates to a base fabric of a press felt. The base fabric comprises end regions which are provided with seam loops (4). The seam loops are slanted. Further, the invention relates to a press felt and a method of forming the same.

公开(公告)号：US11162675B2

公开(公告)日：2021-11-02

申请号：US16859240

申请日：2020-04-27

Applicant: Valmet Technologies Oy

Inventor： Tero Heino ,  Juha Ojanperä

IPC: F22B37/24 ,  F22B31/00

Abstract: A supporting beam arrangement (14) for supporting a flue gas duct (10) to a support frame (16) of the flue gas duct. The supporting beam arrangement comprises two horizontal first supporting beams (18) that are parallel and on two opposite sides of the flue gas duct (10) and separated by a distance from the flue gas duct, and further are connected to the support frame (16). The supporting beam arrangement (14) comprises a horizontal second supporting beam (20) defining two opposite ends (22) that are supported to the first supporting beams (18), the second supporting beam extending through the flue gas duct (10) that is supported to the second supporting beam. At least one or each one of the first supporting beams comprises an opening (24), in which opening one of the two opposite ends (22) of the second supporting beam is placed to rest on the first supporting beam (18). A power boiler (50) comprises the supporting beam arrangement (14), the flue gas duct (10) and the support frame (16).

公开(公告)号：US11142422B2

公开(公告)日：2021-10-12

申请号：US16662756

申请日：2019-10-24

Applicant: Valmet Technologies Oy

Inventor： Jari Paanasalo

IPC: B65H26/02 ,  B65H18/08

Abstract: A method of operating an off-line finishing device for fiber webs, in particular an off-line slitter-winder for winding fiber webs, wherein in operating the off-line device the running speed is automatically optimized to minimize cost of web breaks. The method considers the costs associated with a web break during unwinding in addition to the cost benefit of maximizing web unwind speed so as to maximize machine utilization. The method determines an optimal web break stopping time in a web break situation and how often a web break is predicted. Automatic optimization incorporates limitations including the maximum rotation speed of the parent roll, the maximum speed of the fiber web being unwound, the maximum positive torque which can be applied to the parent roll to accelerate the parent roll to a rotation rate which produces a desired web speed, and maximum braking torque.

公开(公告)号：US20210301470A1

公开(公告)日：2021-09-30

申请号：US17207711

申请日：2021-03-21

Applicant: Valmet Technologies Oy

Inventor： Juha-Pekka HUHTANEN ,  Pekka SAUKKO

IPC: D21H11/18 ,  D21D1/22

Abstract: A method and an arrangement (1) for producing nanofibrillar cellulose, wherein lignocellulose-containing fibre material is refined to separate nanofibrils. The method comprises refining the lignocellulose-containing fibre material in at least one refining zone (20) in one or more refiners (5) to separate nanofibrils, supplying the fibre material to be refined into the at least one refining zone of at least one refiner through at least one opening (12, 19) in the refining surface (11, 18) of at least one refining element (7, 13) and/or discharging the fibre material already refined in the at least one refining zone of at least one refiner out of the at least one refining zone through at least one opening (12, 19) in the refining surface (11, 18) of at least one refining element (7, 13), and operating the said at least one refiner to produce a specific edge load (SEL) of less than three J/m in the refining.

公开(公告)号：US20210138367A1

公开(公告)日：2021-05-13

申请号：US16622700

申请日：2018-06-25

Applicant: VALMET TECHNOLOGIES OY

Inventor： Teemu Antikainen

IPC: B01D33/23 ,  B25B5/00

Abstract: The present invention relates to a device (14) and a method for installing a filter bag having an open end on a sector (5) of a disc filter (1). The device (14) comprises a substantially horizontal elongated body (15) having a first end and a second end and at least three clamping devices (16) attached to the body (15). Each clamping device (16) comprises a substantially vertical supporting leg (17). The device (14) comprises a suspension arrangement for the filter bag at both ends of the body (15).

公开(公告)号：US10953405B2

公开(公告)日：2021-03-23

申请号：US15579872

申请日：2016-06-06

Applicant: Valmet Technologies Oy

Inventor： Christer Hedlund ,  Dino Muhic ,  Petteri Vuorio ,  Anders Hawen

IPC: B02C7/12 ,  D21D1/30

Abstract: A blade element (1) for a refiner for refining fibrous material comprises a refining surface (3) provided with blade bars (8, 10) and blade grooves (9, 11) there-between. The blade bars (8, 10) have side walls (8″, 8′″) facing away from one another. The side walls (8″, 8′″) of the at least one blade bar (8) comprise on both of its side walls (8″, 8′″) steps (14″, 14′″) which extend at least partly in the transversal direction relative to the side walls (8″, 8′″) of the blade bar (8) and away from one another.

公开(公告)号：US20210062422A1

公开(公告)日：2021-03-04

申请号：US17004882

申请日：2020-08-27

Applicant: Valmet Technologies Oy

Inventor： Juha-Pekka Huhtanen ,  Marko Loijas

IPC: D21D1/22

Abstract: A blade element pair (20) for a refiner (1, 2, 3) is intended for refining fibrous material. Each blade element (5, 5′, 8, 8′) of the blade element pair (20) has a refining surface (6, 9) with blade bars (16, 18) and blade grooves (17, 19) extending along the blade element (5, 5′, 8, 8′), and openings (14,15) extending through the blade element (5, 5′, 8, 8′). The openings (14, 15) in one of the blade elements (5, 5′, 8, 8′) is at different axial (A) or radial (R) positions from the openings (14,15) in the other blade element (5, 5′, 8, 8′) when the blade elements (5, 5′, 8, 8′) of the blade element pair (20) are set substantially opposite to each other.

公开(公告)号：US20200291574A1

公开(公告)日：2020-09-17

申请号：US16768189

申请日：2018-12-20

Applicant: Valmet Technologies Oy

Inventor： Risto HÄMÄLÄINEN ,  Seppo TUOMINIEMI

IPC: D21C11/08 ,  D21C11/00

Abstract: The invention relates to a method and a system for adjusting S/Na-balance of a sulphate pulp mill, wherein a pulp mill CNCG stream containing sulphur compounds is first scrubbed with an aqueous scrubbing solution containing an alkaline agent, thereby producing an aqueous spent scrubbing solution containing sulphides, which is then oxidized in a bioreactor by means of sulphur-oxidizing microbes, thereby obtaining an aqueous suspension containing elemental sulphur from which the elemental sulphur can be separated as a precipitate and the residual solution may be used for replenishing the aqueous scrubbing solution.

公开(公告)号：US20200262668A1

公开(公告)日：2020-08-20

申请号：US16792638

申请日：2020-02-17

Applicant: Valmet Technologies Oy

Inventor： Jaakko Haapanen

IPC: B65H19/10

Abstract: A reeling shaft transfer rail system has two parallel substantially horizontal or slightly sloped rails for supporting the ends (25) of a reeling shaft (20). Hoses are arranged on each of the transfer rails (15) and filled or drained to move and hold the reeling shaft (20). In a method of transferring reeling shafts on transfer rails, the reeling shafts (20) are transferred on two parallel, substantially horizontal or slightly downstream of a main transfer direction inclined transfer rails (15) for supporting each of the supporting ends (25) of a reeling shaft (20). The reeling shafts (20) are transferred or positioned in the reeling shaft transfer rail system (10) by pressurizing hoses (17) arranged on each of the transfer rails. The hoses are arranged so fluid added to or withdrawn from the hoses pushes or holds the reeling shaft (20) on the transfer rails (15).

公开(公告)号：US10465339B2

公开(公告)日：2019-11-05

申请号：US16323758

申请日：2017-08-17

Applicant: Valmet Technologies Oy

Inventor： Asta Humalajoki ,  Antti Vaeljae ,  Heikki Airikkala ,  Seppo Tuominiemi ,  Peter Bjoerklund

IPC: C01B17/80 ,  D21C11/00 ,  D21C11/06 ,  D21C11/04 ,  B01D5/00 ,  C01B17/60

Abstract: A system for producing aqueous sulphuric acid is provided, the system including a first heat exchanger configured to cool aqueous sulphuric for producing cooled aqueous sulphuric acid; a pre-cooling unit comprising an inlet or inlets for receiving the gas containing sulphur trioxide and the cooled aqueous sulphuric acid, an outlet for letting out aqueous sulphuric acid and the gas containing sulphur trioxide, and a first nozzle for spraying the cooled aqueous sulphuric acid onto the gas containing sulphur trioxide. The system further includes a condensation tower comprising a first inlet for receiving the cooled gas containing sulphur trioxide and aqueous sulphuric acid from the pre-cooling unit and means for circulating the aqueous sulphuric acid within the condensation tower by spraying. An associated method and pre-cooling unit suitable for cooling gas comprising sulphur trioxide from at least 400° C. to at most 150° C. are also provided.