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公开(公告)号：US20210102339A1
公开(公告)日：2021-04-08
申请号：US17062321
申请日：2020-10-02
Applicant: Valmet Technologies Oy
Inventor： Rauno Enqvist
Abstract: A dryer fabric has a weft of cross machine direction yarns (6) and a first warp of first machine direction yarns (5) and a second warp of second machine direction yarns (9). The yarns of the first warp are arranged above the yarns of the second warp on a first surface (FS) side. The first warp has primary yarns (51) of PPS or PK yarns whose breaking load remains substantially stable within 15 days in conditions where RH=100%, T=125° C. and p=2.3 bar; and secondary yarns (52) of PET with breaking loads which substantially decrease under the same conditions. At least every second yarn of the first warp is a secondary yarn (52). The secondary yarns (52) may be two out of three or three out of four of the first machine direction yarns (5). PET reduces cost and adds elasticity to the dryer fabric.
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92.发明申请公开(公告)号：US20200378278A1
公开(公告)日：2020-12-03
申请号：US16760606
申请日：2018-11-30
Applicant: Valmet Technologies Oy
Inventor： Jarmo MANSIKKASALO
Abstract: Disclosed is a system for producing electricity, the system comprising a chemical recovery boiler adapted to supply superheated steam to a steam turbine driving a generator, the chemical recovery boiler comprising a first flue discharge channel with a first heat exchanger arrangement; and a lime kiln comprising a second flue discharge channel with a second heat exchanger arrangement; and a circulation for heat transfer medium between the said heat exchanger arrangements. Also disclosed is a method for producing electricity, wherein said heat transfer medium is circulated between said heat exchanger arrangements such that thermal energy may be transferred from the flue gases in the first flue charge channel and/or the second flue discharge channel into the feed water of the chemical recovery boiler and/or into a heat-consuming process.
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公开(公告)号：US10815619B2
公开(公告)日：2020-10-27
申请号：US16066955
申请日：2016-12-28
Applicant: Valmet Technologies Oy
Inventor： Jari Jannetyinen , Petteri Halme , Jori Onnela
Abstract: The invention relates to a press belt for a shoe press. A press belt (5) is an endless loop made of elastomeric material and its outer surface (11) is provided with several grooves (13) to remove water. On the outer surface (11) of the press belt, there is at least one section where the depths (GD) of adjacent drain grooves, from the outer surface, change constantly. The invention also relates to an arrangement in a long nip and to a method of manufacturing a press belt.
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公开(公告)号：US20200277734A1
公开(公告)日：2020-09-03
申请号：US16803596
申请日：2020-02-27
Applicant: Valmet Technologies Oy
Inventor： Tommy Kallerdahl , Johnny Ånerud
Abstract: A traversable measuring device (15) for determining a cross direction profile of a property of a moving lignocellulose-containing fiber web (2). The measuring device has a property measuring sensor (23) for determining a measurement result representing the property of the web at multiple cross directional measurement positions (P1, P2, P3, P4), a position measuring sensor (24) for determining the cross directional measurement position of the property measuring sensor associating to the respective measurement result, and an analysis device (25) for receiving the measurement results and the respective cross directional measurement positions (P1, P2, P3, P4) and for allocating the measurement results with the respective cross directional measurement positions for forming the cross direction profile of the web property (2). The measuring device has a mounting bracket (16) that is detachably fixable with quick clamping for fastening the measuring device at a measurement site in a fiber web machine (1).
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公开(公告)号：US10751729B2
公开(公告)日：2020-08-25
申请号：US15842439
申请日：2017-12-14
Applicant: Valmet Technologies Oy
Inventor： Juha Tolvanen
Abstract: An electrostatic precipitator for removing particulates from boiler fine gas is provided. The electrostatic precipitator comprises discharge electrodes and collecting electrodes fitted in a gas passage, the electrodes being arranged in at least two electrical fields that are placed successively in relation to gas flow, and the electrical field establishing at least one electrical unit in transversal direction of said gas passage. The at least one electrical unit has the ability to be de-energised independently, separately from the other electrical units of the electrostatic precipitator. The first electrical field of the at least two electrical fields is also arranged first in the gas flow, and the first electrical field comprises more electrical units than a second field following the first field.
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Patent Agency Ranking
公开(公告)号：US10584298B2
公开(公告)日：2020-03-10
申请号：US15776700
申请日：2016-11-10
Applicant: Valmet Technologies Oy
Inventor： Tero Joronen
Abstract: A method for manufacturing biomass based fuel configured to reduce chemical and/or mechanical effects of flue gas on heat transfer surfaces is described. The method comprises providing biomass and steam into a reactor; maintaining said biomass and said steam simultaneously in the reactor, in a pressure of at least 10 bar(a) and at a temperature from 180° C. to 250° C. for at least 2 minutes; and decreasing the pressure in the reactor and/or conveying biomass out of the reactor such that the pressure of the environment of the biomass decreases below 5 bar(a), to produce steam-exploded biomass. The method further comprises adding some combustion additive to the biomass and/or the steam-exploded biomass.
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97.发明申请公开(公告)号：US20200048832A1
公开(公告)日：2020-02-13
申请号：US16660499
申请日：2019-10-22
Applicant: Valmet Technologies Oy
Inventor： Jarmo Mansikkasalo
Abstract: The disclosed solution relates to recovering thermal energy from the operation of a dissolver of a chemical recovery boiler used in pulp manufacturing. According to the solution, a primary fluid circuit conveys green liquor from the dissolver to an external process such as causticizing and solvent such as weak white liquor back to the dissolver, and from this circuit solvent is diverted into a secondary fluid passageway comprising a heat exchanger which cools the solvent by recovering heat from it and transfers the heat to a heat-consuming process. After heat recovery, solvent may be used for further processes before it is at least partly conveyed back to the dissolver.
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公开(公告)号：US10526155B2
公开(公告)日：2020-01-07
申请号：US15933164
申请日：2018-03-22
Applicant: Valmet Technologies Oy
Inventor： Jari Paanasalo , Kenneth Åkerlund , Mikko Veijalainen
IPC: B65H18/26 , B65H23/198 , B65H18/20 , B65H18/10 , B65H20/02
Abstract: This invention relates to a method of controlling the operation of a winder in which method while forming at least one fiber web roll the fiber web is brought on the web roll via a nip formed by a first support drum and the web roll, which first support drum is driven by a first drive assembly (20) applying controllable torque to the drum and the winding force is applied to the web roll by a second drive assembly (22). In the method the second drive assembly (22) is controlled based on the indicative speed difference of the second drive assembly (22) and setting a friction coefficient for determination of maximum winding force.
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公开(公告)号：US10358607B2
公开(公告)日：2019-07-23
申请号：US15378837
申请日：2016-12-14
Applicant: Valmet Technologies Oy
Inventor： Teppo Riihimaeki , Antti Kaura , Lauri Kokko , Joakim Autio
Abstract: A filter for filtering pyrolysis oil and an arrangement. The filter is a split-flow filter (1, 1a, 1b), comprising a filter element (12), comprising plurality of apertures (17) extending through the filter element (12), a receiving channel (13) for receiving a flow (F) of pyrolysis oil to be filtered and for supplying said flow on first side (A) of the filter element (12), a main discharge channel (14) arranged on the first side (A) of the filter element (12) for discharging the portion of the flow (F) of pyrolysis oil having not penetrated through the filter element (12), and a filtrate channel (15) arranged on second side (B) of the filter element (12) for discharging the portion of the flow (F) of pyrolysis oil having penetrated through the filter element (12).
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公开(公告)号：US20190203134A1
公开(公告)日：2019-07-04
申请号：US15776700
申请日：2016-11-10
Applicant: Valmet Technologies Oy
Inventor： Tero Joronen
CPC classification number: C10L10/06 , C10L5/363 , C10L5/442 , C10L5/445 , C10L5/48 , C10L9/12 , C10L10/02 , C10L10/04 , C10L2200/0213 , C10L2200/0272 , C10L2200/029 , C10L2230/02 , C10L2290/08 , C10L2290/141 , C10L2290/148 , C10L2290/22 , C10L2290/28 , C10L2290/30 , C10L2290/46 , C10L2290/48 , C10L2290/545 , Y02E50/10 , Y02E50/14 , Y02E50/30
Abstract: Biomass based fuel configured to reduce chemical and/or mechanical effects of flue gas on heat transfer surfaces. The biomass based fuel comprises steam-exploded biomass and some combustion additive. The combustion additive is selected from a group of additives that are capable of reducing chemical and/or mechanical effects of flue gas on heat transfer surfaces. The combustion additive may comprise fouling-reducing additive and/or an additive reducing corrosion potential. In addition, a method for manufacturing biomass based fuel configured to reduce chemical and/or mechanical effects of flue gas on heat transfer surfaces. The method comprises providing biomass and steam into a reactor; maintaining said biomass and said steam simultaneously in the reactor, in a pressure of at least 10 bar(a) and at a temperature from 180 ° C. to 250 ° C. for at least 2 minutes; and decreasing the pressure in the reactor and/or conveying biomass out of the reactor such that the pressure of the environment of the biomass decreases below 5 bar(a), to produce steam-exploded biomass. The method further comprises adding some combustion additive to the biomass and/or the steam-exploded biomass.
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