公开(公告)号：US20220349309A1

公开(公告)日：2022-11-03

申请号：US17732103

申请日：2022-04-28

Applicant: Valmet Technologies Oy

Inventor： Håkan Sjöström ,  Tuomas Himanka

IPC: F01D5/14 ,  F01D5/02 ,  F01D9/02

Abstract: A blade element (4, 8) for a comminution device (1) to comminute fiber material has at least one comminution section (22) with comminution parts (20, 24, 25, 26) and free spaces (21) therebetween, and at least one feed section (23) extending at least partly in a longitudinal direction (X) of the blade element (4, 8), each feed section (23) intended to feed fiber material to the respective comminution section (22). The comminution parts have a first dimension (d20a, d20b, d20c, d24a, d24b, d24c) extending in a circumferential direction (C) of the blade element and a second dimension (e20a, e20b, e20c, e24a, e25a, e26a) extending in the longitudinal direction (X) of the blade element. At the same longitudinal (X) position in the blade element (4, 8) the first dimension of the comminution parts is arranged to increase in the circumferential direction (C) of the blade element toward the feed section.

公开(公告)号：US11486090B2

公开(公告)日：2022-11-01

申请号：US16771509

申请日：2018-12-13

Applicant: Valmet Technologies Oy

Inventor： Matti Kytö

IPC: D21C11/08 ,  D21C7/08 ,  F23C6/04 ,  F23C7/06 ,  F23G7/06

Abstract: A method for burning primary fuel (F1), wherein the primary fuel (F1) comprises at least a first compound containing nitrogen and a second compound comprising sulfur. The method comprises producing primary combustion gas (G1) having a temperature of at least 450° C. and comprising oxygen; feeding the primary fuel (F1) and the primary combustion gas (G1) to a primary process zone (Z1) of a furnace (200); feeding tertiary combustion gas (G3) to a secondary process zone (Z2) of the furnace (200); letting the primary fuel (F1), the primary combustion gas (G1), and/or their reaction products to move from the primary process zone (Z1) via the secondary process zone (Z2) to a tertiary process zone (Z3) of the furnace (200); and feeding quaternary combustion gas (G4) comprising oxygen to the tertiary process zone (Z3) of the furnace (200). An embodiment comprises collecting the primary fuel (F1) from a pulp process. A corresponding system.

公开(公告)号：US20220325961A1

公开(公告)日：2022-10-13

申请号：US17704632

申请日：2022-03-25

Applicant: Valmet Technologies Oy

Inventor： Pekka LEHTONEN

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

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).

公开(公告)号：US20220251782A1

公开(公告)日：2022-08-11

申请号：US17628147

申请日：2020-09-03

Applicant: Valmet Technologies Oy

Inventor： Jorma Naamanka ,  Juha Nieminen

IPC: D21F7/10 ,  D21F7/08 ,  D21F7/00

Abstract: A fabric for a paper or pulp technology has a longitudinal direction (MD) and a cross direction (CMD), and a first surface (FS) and a second surface (SS) in a fabric thickness direction (TD). The fabric (1) extends in the cross direction (CMD) from a first edge (FG) to a second edge (SG). The fabric (1) has an adaptable medium comprising at least one sensor. The adaptable medium is a deformable structure that adapts to the fabric where it is inserted and may be a string or a sheet configured to detect temperature, temperature profile, wear, volatile organic compounds (VOC), humidity, pH, microbial level, organic and inorganic material content, dirt content, flow rate and flow velocity field, or pressure in a nip. The invention also relates to a method for manufacturing a fabric for a paper or pulp technology.

公开(公告)号：US20220161267A1

公开(公告)日：2022-05-26

申请号：US17103398

申请日：2020-11-24

Applicant: Valmet Technologies Oy

Inventor： Greg Sleeper ,  Sanjay Yallure

IPC: B02C7/12

Abstract: An assembly comprising an annular hub with a hub inner surface and a hub outer surface and a rotary third refining member having a central opening within a refining member inner surface. The refining member has at least two equally spaced apart member portions extending radially inwardly from the member inner surface, and the assembly includes a key for connecting the member portions to the hub. The assembly also include an annular cover plate with at least two radially extending spaced apart flanges, each flange overlying a member portion, and at least two spaced apart port plates, each port plate overlying a member portion side opposite the annular cover plate, the spaces between the at least two port plates defining ports from a first stock flow path to a second stock flow path.

公开(公告)号：US11339536B2

公开(公告)日：2022-05-24

申请号：US16977066

申请日：2019-03-01

Applicant: Valmet Technologies Oy

Inventor： Jani Turunen ,  Marko Kovanen ,  Heikki Kettunen

IPC: D21G1/02 ,  B65H27/00 ,  D21C9/00 ,  D21H11/18 ,  D21H23/58 ,  B82Y30/00

Abstract: The invention relates to a roll for use in a manufacture of a fibrous web, which comprises cellulosic fibers. The roll comprises a roll body with a cylindrical surface, and a roll cover, which is arranged to cover the cylindrical surface of the roll body. The cover has a functional layer, which has a polymer matrix and reinforcing material in the form of functional particles and/or functional fibers embedded in the polymer matrix. The functional particles and/or functional fibers has nanocellulose material. The invention relates also to the use of the roll.

公开(公告)号：US20220154974A1

公开(公告)日：2022-05-19

申请号：US17526366

申请日：2021-11-15

Applicant: Valmet Technologies Oy

Inventor： Mikko PAAVOLA

IPC: F24H1/44 ,  F24H8/00 ,  F24D3/18 ,  F24D10/00 ,  F24D19/10

Abstract: A method and an arrangement for recovering heat from flue gas of a boiler (10). The method comprises passing the flue gas (G) of the boiler though a flue gas cooling unit (1), cooling the flue gas (G) by transferring heat from the flue gas (G) into a circulation (3) of a flue gas cooling liquid (CL), transferring heat energy of said flue gas cooling liquid (CL) into a heat pump (2), and arranging the heat pump (2) for receiving heat energy also from a circulation arrangement (8) of a district cooling system. The heat pump (2) is coupled to a circulation arrangement (6) of a district heating system, wherein the method further comprises transferring in the heat pump (2) heat energy (H) received from said cooling liquid (CL) and from said circulation arrangement (8) of district cooling system into said circulation arrangement (6) of district heating system, for lowering the temperature of said flue gas cooling liquid (CL) and cooling fluid of said district cooling system, and raising the temperature of heating fluid of said district heating system.

公开(公告)号：US20210372610A1

公开(公告)日：2021-12-02

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：US20210340707A1

公开(公告)日：2021-11-04

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：US10982356B2

公开(公告)日：2021-04-20

申请号：US16479325

申请日：2018-03-21

Applicant: VALMET TECHNOLOGIES OY

Inventor： Rauno Enqvist ,  Juha Paavolainen

IPC: D03D3/04 ,  D03D1/00 ,  D03D1/02 ,  D03D25/00 ,  D21F1/00 ,  D21F1/10 ,  D21F7/08

Abstract: An industrial textile (1) having a longitudinal direction (MD) and a cross direction (CMD) and a first surface and a second surface, the industrial textile (1) extending in the cross direction from a first edge (E1) to a second edge (E2). The industrial textile (1) has a double warp which comprises a first warp having first machine direction yarns (U1, U2) and a second warp having second machine direction yarns (LI, L2). The yarns (U1, U2) of the first warp are arranged above the yarns (LI, L2) of the second warp and the yarns of the first warp are at least partially offset in respect of the yarns of the second warp. The industrial textile has a weft having cross machine direction yarns (W1, W2, W3, W4). The yarns (U1, U2) of the first warp and the yarns (W1, W2, W3, W4) of the weft bind themselves to each other according to a first predetermined pattern and the yarns (LI, L2) of the second warp and the yarns (W1, W2, W3, W4) of the weft bind themselves to each other according to a second predetermined pattern. The first predetermined pattern and the second predetermined pattern form a textile structure which has the cross machine direction yarns (W1, W2, W3, W4) at least on two different levels in the thickness direction of the industrial textile (1).