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公开(公告)号：US20210237024A1
公开(公告)日：2021-08-05
申请号：US17049196
申请日：2019-03-29
申请人： VALMET AB
摘要： A reactor vessel (1) for biomass material, wherein said reactor vessel (1) is a pressurized reactor vessel, said reactor vessel being elongated and comprising: a substantially tubular vessel part (3); two gables (5a, 5b) connected one to each end (19a, 19b) of the tubular vessel part (3), hereby enclosing a vessel internal compartment (7); and a material transporting screw (8) comprising a central shaft (9) provided within the vessel internal compartment (7) extending between the two gables (5a, 5b) along a central axis (A) of the reactor vessel (1), wherein said material transporting screw further comprises screw flight (11) provided around the shaft (9), wherein said material transporting screw is configured for transporting the biomass material through the reactor vessel, wherein both gables (5a, 5b) are inwardly dished.
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公开(公告)号：US20230220620A1
公开(公告)日：2023-07-13
申请号：US18007532
申请日：2021-04-28
申请人： VALMET AB
IPC分类号： D21B1/36
CPC分类号： D21B1/36
摘要： The present invention relates to a method for defibrating a lignocellulosic material in a steam explosion process, the method comprising: —supplying (1001) lignocellulosic material to a reactor (8), —treating (1002) the lignocellulosic material in the reactor (8) at a first pressure (P1), —discharging (1003) the lignocellulosic material from the reactor (8) to a vessel (13), wherein the vessel (13) is at a second pressure (P2) that is lower than the first pressure (P1) so that the lignocellulosic material is defibrated through steam explosion as it passes from the reactor (8), wherein lignocellulosic material is continuously supplied to and discharged from the reactor (8) in such a way that the first pressure (P1) is constant. The invention also relates to a defibration system for defibrating a lignocellulosic material in a steam explosion process.
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公开(公告)号：US20230043719A1
公开(公告)日：2023-02-09
申请号：US17784297
申请日：2020-10-01
申请人： VALMET AB
发明人： Francois LAMBERT , Rolf BOMAN
摘要： Method for treating biomass, comprising compressing and dewatering (62) the biomass to a dry solid content of DS1% by weight; feeding (63) compressed biomass to a treatment vessel; adding (64) a treatment liquid to said treatment vessel; discharging (65) treated biomass; compressing and dewatering (66) discharged biomass to a dry solid content of DS2% by weight, and treating (68) the compressed and dewatered biomass in a hydrolysis reactor, wherein 1%
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公开(公告)号：US20210140105A1
公开(公告)日：2021-05-13
申请号：US16605146
申请日：2018-05-02
申请人： VALMET AB
发明人： Andreas AVERHEIM , Francois LAMBERT
摘要： The invention relates to a method for treating biomass (2). Biomass (2) is fed to a pressurized prehydrolysis reactor unit (8) by means of a feeding system (5, 7), wherein by means of the feeding system (5, 7) the biomass (2) is compressed. A filtrate is squeezed out of the biomass (2) by means of the feeding system (5, 7), in particular by a first plug screw (5) or a second plug screw (7) of the feeding system (5, 7). The biomass (2) is then thermally treated in the pressurized prehydrolysis reactor unit (8), discharged from the pressurized prehydrolysis reactor unit (8) afterwards, diluted with the filtrate before or after the discharge, and treated with an enzyme subsequently.
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公开(公告)号：US20200306719A1
公开(公告)日：2020-10-01
申请号：US16759503
申请日：2018-10-30
申请人： VALMET AB
摘要： A reactor arrangement for pre-hydrolysis of biomass material. The reactor arrangement comprises a reactor vessel arranged substantially horizontally, wherein the vessel comprises an inlet for receiving the biomass material arranged at an upper portion of the vessel. The inlet may be arranged at a first longitudinal end of the vessel. The vessel may furthermore comprise an outlet at a second longitudinal end of the vessel. The reactor arrangement further comprises a set of steam injection orifices arranged to inject or supply steam into the reactor vessel. The set of steam injection orifices comprises at least two orifices arranged below the inlet at a distance from each other. The at least two orifices may be arranged at a distance from each other in the lateral direction of the reactor vessel. Furthermore, a method for pre-hydrolysis treatment of biomass in a substantially horizontal reactor vessel is provided.
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公开(公告)号：US20190271113A1
公开(公告)日：2019-09-05
申请号：US16348811
申请日：2017-12-07
申请人： Valmet AB
发明人： Francois LAMBERT
摘要： The invention relates to a method for treating biomass (2). In a step (S10), biomass (2) and an impregnation liquid are fed into a first reactor unit (10) such that the biomass (2) is impregnated with the impregnation liquid while the biomass (2) is transferred through the first reactor unit (10) by a conveyor means (11). In another step (S20), the impregnated biomass (2a) is transferred from the first reactor unit (10) to a separation unit (25), wherein at least a part of the impregnation liquid is separated from the impregnated biomass (2a) within the separation unit. In a step (S30), the separated impregnation liquid is discharged from the separation unit (25), such that a first part (26a) of the impregnation liquid is recirculated back to the first reactor unit (10). The invention further relates to a system for treating biomass (2).
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公开(公告)号：US20240229353A1
公开(公告)日：2024-07-11
申请号：US18558642
申请日：2022-05-03
申请人： VALMET AB
摘要： A method for continuously treating biomass material includes: feeding the biomass material into a substantially vertically arranged pressurized vessel; adding steam to said pressurized vessel for hydrothermal treatment of the biomass material, wherein said adding steam comprises adding steam at a lower portion of the pressurized vessel; discharging the biomass material from a bottom portion of the pressurized vessel using a discharge device; withdrawing vapor from a top portion of the pressurized vessel, and adding said vapor to the discharge device; controlling differential pressure between said top portion of the pressurized vessel and said discharge device by controlling a flow of said vapor; and determining a minimum flow of steam needed to heat the biomass material in the pressurized vessel to a predetermined temperature, wherein said adding steam comprises adding steam at a flow that is higher than said minimum flow.
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公开(公告)号：US20210230801A1
公开(公告)日：2021-07-29
申请号：US17216850
申请日：2021-03-30
申请人： VALMET AB
摘要： A system for feeding lignocellulosic biomass material, comprising a pre-compressing stage for receiving biomass material and pre-compressing the material at a first pressure and a first compression ratio. A plug screw feeder receives the pre-compressed material and feeds the material against a second pressure and a second compression ratio, wherein the plug screw feeder includes a variable speed plug screw arranged in the plug screw feeder connected to a variable speed plug screw power source.
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公开(公告)号：US20210206131A1
公开(公告)日：2021-07-08
申请号：US17270929
申请日：2019-06-14
申请人： VALMET AB
发明人： Francois LAMBERT
摘要： Disclosed is a screw feeder (10) comprising a pipe (3) enclosing a feed screw 4 arranged on a rotatory shaft (5) running parallel with the length direction of the pipe (3), said pipe (3) further comprising a number of dewatering holes (6). The screw feeder (10) also comprises a number of anti-rotation bars (7) provided on, and extending along, the inside of said pipe (3), said anti-rotation bars (7) protruding in a direction towards said feed screw (4), and an inlet (1) for receiving a solid-liquid mixture arranged at a first end of said pipe (3), and an outlet (2) arranged at a second end of said pipe (3) for discharging an at least partially dewatered solid from said pipe (3). The pipe (3) includes at least one longitudinal pipe section (31) having a first peripheral zone (9) provided in the vertically lower area of said longitudinal pipe section (31) and provided with dewatering holes (6) but no anti-rotation bars (7) and a second peripheral zone (90) provided in the vertically upper area of said longitudinal pipe section (3) provided with anti-rotation bars (7), the overall pipe profile of said pipe section (31) is composed of two differently shaped pipe profiles, a first pipe profile (P1) and a second pipe profile (P2), said first pipe profile (P1) defining the shape of the first peripheral zone (9) and is a profile selected from a square shaped profile, a profile having a partly circular cross-section with a squashed end or a circle segment remove or a partly elliptically shaped profile, and the second pipe profile (P2) defining the shape of the second peripheral zone (90), where the shape of said first pipe profile (P) is selected to allow the outer edges of said feed screw (4) to remove material overlying said dewatering holes (6), and where the shape of said second pipe profile (P2) is selected so as to prohibit any contact between said outer edges of said feed screw (4) and the anti-rotation bars (7). Also disclosed is a pipe for use in such a screw feeder.
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公开(公告)号：US20200332375A1
公开(公告)日：2020-10-22
申请号：US16762570
申请日：2018-09-21
申请人： VALMET AB
摘要： A method for processing lignocellulose materials comprising the steps of hydrothermal treatment of the material with saturated or superheated steam in a hydrothermal pressure vessel, wherein the steam is provided by means of a steam boiler. The treatment is performed at a pressure of 5-30 bars, and at a temperature of 160-240° C. for a duration of 1-20 minutes. The method further comprises discharging hydrothermally treated lignocellulose material and steam from the pressure vessel by means of rapid pressure reduction, separating the steam and vapours released from the lignocellulose material, and burning the vapours together with additional fuel and combustion air in the furnace of said steam boiler. Furthermore, a corresponding system is provided.
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