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.

公开(公告)号：US11300288B2

公开(公告)日：2022-04-12

申请号：US16754681

申请日：2018-10-17

Applicant: Valmet Technologies Oy

Inventor： Mikko Varonen ,  Matti Nieminen

IPC: F22G3/00 ,  F01K3/24 ,  F22B31/00 ,  F22G1/16

Abstract: The solution comprises a method of and a system for maintaining steam temperature and therefore electricity production efficiency with decreased loads of a steam turbine power plant comprising a fluidized bed boiler (12) and a fluidized bed superheater (2) adapted to superheat steam supplied to a steam turbine (3). According to the solution, the steam temperature may be maintained by providing, outside a furnace (10), additional heating to the fluidized bed material in its outer circulation, thereby increasing the amount of thermal energy available in the fluidized bed material to be transferred in the fluidized bed superheater (2) to the steam supplied to the steam turbine (3). Such additional heating may be performed by selectably supplying combustible gas with nozzles (111) into and/or burned with a burner in or in the vicinity of the fluidized bed material outside the furnace (10). As an additional aspect of the disclosed solution, the combustible gas may be produced with a gasifier (4).

公开(公告)号：US20210363697A1

公开(公告)日：2021-11-25

申请号：US17324930

申请日：2021-05-19

Applicant: Valmet Technologies Oy

Inventor： Satu Hagfors ,  Vesa-Matti Rilhioja

IPC: D21F3/02

Abstract: A belt (10) for a sleeve roll forms a closed loop and has an inner surface (11) and an outer surface (12). The belt has an elastic body (15) with an outer surface (15a) and a reinforcing structure (30). The reinforcing structure has first yarns (31a) arranged to a first direction (D1), and second yarns (32a) arranged to a second direction (D2). The second yarns (32a) are arranged, at least partially, on the elastic body (15), and/or the second yarns (32a) are arranged to a depth of equal to or less than 2 mm, measured from the outer surface (15a) of the elastic body to a bottom (32a-i) of the second yarn (32a) in a depth direction of the belt. The invention further relates to a use of a belt. The invention further relates to an arrangement comprising a belt and a sleeve roll.

公开(公告)号：US20210362084A1

公开(公告)日：2021-11-25

申请号：US17323071

申请日：2021-05-18

Applicant: Valmet Technologies Oy

Inventor： Marilene Amaral Leite Manoel ,  Rafael de Felipe Zica ,  Siterzany Fonseca ,  Wallace Farias Bacelar ,  Thiago Pavan

IPC: B01D46/00 ,  B01D46/02

Abstract: A leaf filter bag for a leaf (110) of a pressure leaf filter (100) has a first sheet portion (50), adjacent to a second sheet portion (60). The first sheet portion (50) is connected to the second sheet portion (60) at a first edge (10), a second edge (20) and a third edge (30). Forth edges of the sheet portions define an openable and closable edge (40) which has an open position and a closed position, which allows inserting a frame (122) of the leaf (110) into the leaf filter bag (1) through an opening formed by the openable and closable edge (40) in the open position. A zipper (42) closure (41) is provided at the openable and closable edge (40), and a further hook-and-loop fastener closure may be provided.

公开(公告)号：US20210354076A1

公开(公告)日：2021-11-18

申请号：US17273640

申请日：2019-09-24

Applicant: Valmet Technologies Oy

Inventor： Risto HÄMÄLÄINEN ,  Tarja KORHONEN ,  Naveen CHENNA ,  Lauri KOKKO

IPC: B01D53/14 ,  B01D53/86 ,  C01B7/03 ,  C01B7/07 ,  B01J8/00 ,  F23J15/04

Abstract: A method for producing aqueous hydrochloric acid from flue gases is provided. The method comprises conveying water to a first scrubber (102, 202, 302, 402, 502, 602, 702) or to a line (112b, 212b, 312b, 412b, 512b, 712b, 712c) to use the water in a scrubbing liquid of the first scrubber. The method also comprises providing flue gas containing chlorides into the first scrubber (102, 202, 302, 402, 502, 602, 702) and scrubbing the flue gas containing chlorides with the scrubbing liquid by contacting the flue gas with the scrubbing liquid in the first scrubber (102, 202, 302, 402, 502, 602, 702). Dilute hydrochloric acid and a flue gas derivate (104, 204, 304, 404, 504, 704) are produced. The method comprises letting out at least some of the dilute hydrochloric acid from the first scrubber (102, 202, 302, 402, 502, 602, 702) as a scrubber bleed, separating solids suspended by the scrubber bleed in a solids separator (192, 592, 692), conveying the scrubber bleed from the solids separator (192, 592, 692) into an evaporation vessel (194, 594, 694) and concentrating the scrubber bleed in the evaporation vessel (194, 594, 694) to produce hydrochloric acid vapor having a concentration of 5-22 wt-%. A corresponding system is also provided.

公开(公告)号：US20210239313A1

公开(公告)日：2021-08-05

申请号：US17052698

申请日：2019-04-16

Applicant: Valmet Technologies Oy

Inventor： Pasi SALONEN ,  Tero Heino

IPC: F22B37/24 ,  F22B37/14 ,  F22B37/20 ,  F22B37/22

Abstract: A support assembly (40) for supporting the furnace (22) of a boiler (10) to a support frame (12) of the boiler. The support assembly comprises a first and second assembly parts (56, 8). The first assembly part (56) attaches a pipe (18), f.ex. a downcomer, to a supporting beam (32, 88). The second assembly part (58) attaches the same pipe (18) to another supporting beam (30, 86). The support assembly (40) may be obliquely positioned. Alternatively, the support frame further comprises an oblique, connecting supporting beam (84) that connects the first and second assembly parts. In this case, the first and second assembly parts attach the pipe to the connecting supporting beam (84). The first and second assembly parts define first and second points of support (52, 4) that transmit loads. The first or second assembly part may be a hanger rod. A boiler plant comprises the above-mentioned boiler, support frame for the boiler and support assembly.

公开(公告)号：US20210180250A1

公开(公告)日：2021-06-17

申请号：US16771509

申请日：2018-12-13

Applicant: Valmet Technologies Oy

Inventor： Matti KYTÖ

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

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：US20200347551A1

公开(公告)日：2020-11-05

申请号：US16865324

申请日：2020-05-02

Applicant: Valmet Technologies Oy

Inventor： Lasse Kauppinen

IPC: D21D1/00 ,  D21D1/20 ,  D21H11/18 ,  D21H11/20

Abstract: The refining of a fibrous pulp is monitored and controlled by capturing at least one image of a pulp sample, determining the amount of all fibers or non-fibrillated fibers in the at least one image, determining the amount of fibrillated fibers in the at least one image, determining the relation between fibrillated fibers and all fibers or non-fibrillated fibers in the pulp on the basis of the amount of fibrillated fibers and the amount of all fibers or non-fibrillated fibers in the at least one image, generating a control parameter on the basis of the determined relation between fibrillated fibers and all fibers or non-fibrillated fibers in the pulp, and controlling fiber refining by at least one pulp refining device on the basis of the control parameter.

公开(公告)号：US10662584B2

公开(公告)日：2020-05-26

申请号：US16079877

申请日：2017-02-24

Applicant: Valmet Technologies Oy

Inventor： Heikki Kettunen ,  Gerald Kramer ,  Tatu Pitkänen ,  James Sipprell ,  Todd Vandenheuvel

IPC: B65H18/26 ,  D21G9/00 ,  G01L5/108

Abstract: The invention relates to a method for monitoring the condition of a continuous element (44) moving in a fiber web or paper finishing machine, said monitoring being performed with a rotating machine element (41), which is equipped with a sensor assembly (24) that measures force or pressure and against which the continuous element moves. In the method, the machine element is made to rotate against the continuous element, a measurement signal (25) is generated between the machine element and the continuous element with the sensor assembly, and a cross-directional profile (21) of force or pressure generated between the machine element and the continuous element is formed from the measurement signal. Said moving continuous element is a fabric (32, 33) installed in a fabric run (22, 23) traveling via the machine element. In the method, the fabric is additionally installed in a fabric run, wherein it moves via said machine element equipped with a sensor assembly, a reference profile (35) is formed for the cross-directional profile after installing the fabric in the fabric run, the cross-directional profile formed from the measurement signal and representing force or pressure generated between the machine element and the fabric is compared with the reference profile, and information (37) is produced from the comparison for monitoring the condition of the fabric. The invention also relates to a corresponding system and a computer program product.