公开(公告)号：US20230183921A1

公开(公告)日：2023-06-15

申请号：US17924997

申请日：2021-05-12

Applicant: VALMET TECHNOLOGIES OY

Inventor： Marko Loijas ,  Ville Ruola

IPC: D21D1/30 ,  D21D1/22

CPC classification number: D21D1/306 ,  D21D1/22

Abstract: A blade element (4, 8) for a refiner (1) for refining fibrous material has a first end edge (18) to be directed towards a feed of the fibrous material to be refined and a second end edge (19) to be directed towards a discharge of the refined fibrous material and a refining surface (5, 9) comprising blade bars (16) and blade grooves (17) therebetween. The refining surface (5, 9) has at least one equalizing pocket (23) extending along the refining surface (5, 9) of the blade element (4, 8) and crossing a number of the blade bars (16) and a number of the blade grooves (17) for equalizing flow of the fibrous material along the refining surface (5,9).

公开(公告)号：US20230183920A1

公开(公告)日：2023-06-15

申请号：US17925478

申请日：2021-05-24

Applicant: Valmet Technologies Oy

Inventor： Naveen CHENNA ,  Tero JUUTILAINEN

IPC: D21C11/08 ,  B01D53/58

CPC classification number: D21C11/08 ,  B01D53/58 ,  B01D2257/406 ,  B01D2251/506

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：US11634864B2

公开(公告)日：2023-04-25

申请号：US16768189

申请日：2018-12-20

Applicant: Valmet Technologies Oy

Inventor： Risto Hämäläinen ,  Seppo Tuominiemi

IPC: D21C11/08 ,  D21C11/00 ,  D21C11/06

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：US20230097651A1

公开(公告)日：2023-03-30

申请号：US17956350

申请日：2022-09-29

Applicant: Valmet Technologies Oy

Inventor： Vesa-Matti Riihioja

IPC: C08F283/00

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：US11603989B2

公开(公告)日：2023-03-14

申请号：US16761701

申请日：2018-12-12

Applicant: Valmet Technologies Oy

Inventor： Pekka Lehtonen ,  Tero Heino

IPC: F22B31/00 ,  F23C10/06 ,  F23C10/10 ,  F23C10/20 ,  F23C10/28

Abstract: A circulating fluidized bed boiler, comprising a furnace, a loopseal, and a loopseal heat exchanger arranged in the loopseal. The loopseal heat exchanger comprises at least an inlet chamber, a bypass chamber, and a first heat exchange chamber, heat exchanger pipes arranged in the first heat exchange chamber, and a primary particle outlet for letting out bed material from the first heat exchange chamber. The primary particle outlet has at least a first part and a second part separated from each other by a barrier element in such a way that the first part of the primary particle outlet has a first height and a first width, wherein a ratio of the first height to the first width is less than 0.5 or more than 2. Use of the circulating fluidized bed boiler such that fluidizing gas and bed material are let out from the first heat exchange chamber via the primary particle outlet.

公开(公告)号：US20220396444A1

公开(公告)日：2022-12-15

申请号：US17838188

申请日：2022-06-11

Applicant: Valmet Technologies Oy

Inventor： Jaakko HAAPANEN ,  Henry VIRTA ,  Kenneth ÅKERLUND

IPC: B65H19/18 ,  B65H19/20 ,  B65H21/00

Abstract: A method for joining ends of fiber webs with a device comprising a tool element with a gripping device and a traversing punching device. A run of the fiber web from the emptying parent roll is moved to a joining position at the tool element. The trailing end of the parent roll fiber web is cut upstream from the joining position and the fiber web is attached to the tool element by a gripping device of the tool element. An end of a new roll fiber web is guided to contact with and to an overlapping position with the trailing end of the parent roll fiber. The traversing punching device is moved across the width direction of the fiber webs and makes at least one joint cut and joins the fiber webs. The new fiber web is cut downstream from the joint, and then tension control is turned on.

公开(公告)号：US20220380044A1

公开(公告)日：2022-12-01

申请号：US17751347

申请日：2022-05-23

Applicant: Valmet Technologies Oy

Inventor： Paul Arnold

IPC: B64C39/02 ,  B64D47/08 ,  B64C1/08

Abstract: An unmanned aerial vehicle (UAV) has a multicopter section for flying in air with an attached blower section for generating an air stream for blowing dust off surfaces. A flight controller controls the multicopter section, a blower controller controls the blower section, and a power supply supplies power to the multicopter and blower sections. The flight controller and the blower controller are connected, and the blower controller is adapted to supply blower control commands to the flight controller to compensate for the thrust of the air stream from the blower section by flight control of the multicopter section. The UAV may be enclosed by a protective cage in the form of a meshed polyhedron, wherein the rods of the meshes are elastically connected at the respective nodes.

公开(公告)号：US11452955B2

公开(公告)日：2022-09-27

申请号：US16761625

申请日：2018-11-22

Applicant: VALMET TECHNOLOGIES OY

Inventor： Teemu Antikainen ,  Mika Karaila ,  Joona Nikunen

IPC: B01D35/143 ,  B01D33/21 ,  B01D39/08 ,  B01D33/80 ,  G01N29/14 ,  G01N29/12 ,  G01N29/44 ,  G08B5/36 ,  H04R1/40

Abstract: An arrangement is provided for detecting a damage of a filter fabric (8) of a disc filter (1) at a disc filter unit comprising disc filters. The arrangement includes a measurement bar (20) that includes two or more microphones (21), a store (45) including stored sound samples, at least one alarming means and a processing arrangement (43) for analyzing online sound or sound samples captured by the microphones (21). The processing arrangement (43) is connected to the microphones (21), the store (45) and the at least one alarming means. A method is also disclosed for detecting a damage of a filter fabric (8) of a disc filter (1) at a disc filter unit.

公开(公告)号：US20220275578A1

公开(公告)日：2022-09-01

申请号：US17633055

申请日：2020-08-18

Applicant: Valmet Technologies Oy

Inventor： Aino VETTENRANTA

IPC: D21C11/00 ,  D21C11/10

Abstract: The specification relates to a method and a system for adjusting pH of green liquor dregs. The method comprises contacting a slurry containing green liquor dregs (100, 200, 300, 400, 500) with flue gas (101, 201, 301, 401, 501). The system comprises a recovery boiler (105) configured to burn black liquor to produce smelt, a smelt dissolving tank (107) configured to dissolve the smelt to produce green liquor comprising green liquor dregs, and a green liquor clarifier/filter (103) and/or a dregs filter (104) configured to separate a slurry containing green liquor dregs (100, 200, 300, 400, 500) from the green liquor. The system further comprises a vessel (102, 202, 302, 402) configured to receive a slurry containing green liquor dregs (100, 200, 300, 400, 500) and a gas inlet (210, 310, 410, 510) configured to convey flue gas (101, 201, 301, 401, 501) to be contacted with the slurry containing green liquor dregs (100, 200, 300, 400, 500).

公开(公告)号：US20220195642A1

公开(公告)日：2022-06-23

申请号：US17553301

申请日：2021-12-16

Applicant: Valmet Technologies Oy

Inventor： Hannu Martikainen ,  Mari Seppänen ,  Seppo Taipale

IPC: D03D11/00 ,  D21F1/00 ,  D03D1/00

Abstract: An industrial textile has two layers, a web-side layer and a wear-side layer. The web-side layer has machine direction yarns (1) and binding cross-machine direction yarns (5). The wear-side layer has machine direction yarns (3) and cross-machine direction yarns (4). The binding cross-machine direction yarns (5) extend from the web-side layer to the wear-side layer and bind a portion of the wear-side layer machine direction yarns (3) to bond the web-side layer and the wear-side layer together, and wherein the web-side layer is a non-plain weave.