公开(公告)号：US11761716B2

公开(公告)日：2023-09-19

申请号：US17051645

申请日：2019-05-09

Applicant: Valmet Technologies Oy

Inventor： Juha Ojanperä

IPC: F28F9/013 ,  F28D1/047 ,  F28F9/26 ,  F22B37/20

CPC classification number: F28F9/0131 ,  F22B37/205 ,  F28D1/0475 ,  F28F9/26

Abstract: A heat exchanger having a first heat transfer tube with a first primary straight part and a first secondary straight part is provided. The heat exchanger includes a first primary bond part and a first secondary bond part. The first primary bond part is welded to the first secondary bond part to form a first primary bond that bonds the first primary straight part and the first secondary straight part of the first heat transfer tube. The first primary bond limits a first primary aperture and a first secondary aperture formed by the holes of the bond parts, wherein the straight parts of the first heat transfer tube extend through the first primary bond via the apertures.

公开(公告)号：US20230250583A1

公开(公告)日：2023-08-10

申请号：US18104998

申请日：2023-02-02

Applicant: Valmet Technologies Oy

Inventor： Vesa-Matti Riihioja

IPC: D21F3/02

CPC classification number: D21F3/0236

Abstract: This invention relates to a method for manufacturing a belt for a paper, board, pulp or tissue machine, the belt (5) comprising a body (14), and a reinforcing structure (31, 32), the belt (5) having an inner surface (10) and an outer surface (11), wherein the method comprises: applying a coating comprising a solid lubricant on to a casting cylinder (18), drying the coating comprising the solid lubricant, thereby obtaining solid lubricant particles (29) on the casting cylinder (18), casting a body material (21) onto the casting cylinder (18) in order to form the body (14) on the solid lubricant particles, and providing the reinforcement structure (31, 32) into the belt, thereby obtaining the belt in which the solid lubricant particles forms at least part of the inner surface of the belt. This invention relates to an arrangement for manufacturing a belt for a paper, board, pulp or tissue machine. The invention further relates to a belt for a paper, board, pulp, or tissue machine.

公开(公告)号：US20230191349A1

公开(公告)日：2023-06-22

申请号：US17926066

申请日：2021-06-02

Applicant: Valmet Technologies Oy ,  Neste Oyj

Inventor： Matti YLITALO ,  Teppo RIIHIMÄKI

IPC: B01J6/00 ,  B01J35/02 ,  B01J38/00 ,  B01J29/04 ,  B01J8/02 ,  B01D53/24 ,  B01J19/00

CPC classification number: B01J6/008 ,  B01D53/24 ,  B01J8/02 ,  B01J19/0066 ,  B01J29/04 ,  B01J35/023 ,  B01J38/00 ,  B01J2219/00765 ,  B01J2219/00894

Abstract: A system for producing catalytically treated pyrolytic vapor.The system comprises a pyrolysis reactor (100) configured to produce pyrolytic vapor and a catalytic reactor (200) limiting abed area (B) into which a fluidized catalyst bed is configured to form in use. The catalytic reactor (200) comprises a static mixer (300) configured to spread the particulate catalyst within the bed area (B). Thus, the catalytic reactor (200) is configured to produce a mixture of the particulate catalyst and the catalytically treated pyrolytic vapor from the pyrolytic vapor. A method for producing catalytically treated pyrolytic vapor. The method comprises producing pyrolytic vapor and allowing at least a clean part of the pyrolytic vapor to chemically react in the presence of the particulate catalyst to produce a mixture of the particulate catalyst and catalytically treated pyrolytic vapor. The method comprises mixing, in the bed area, the pyrolytic vapor and the particulate catalyst with a static mixer.

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.