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公开(公告)号：US20190194867A1
公开(公告)日：2019-06-27
申请号：US16302851
申请日：2017-05-23
Applicant: VALMET AB
Inventor： Fredrik WILGOTSON , Eduardo DEUD
IPC: D21C1/06
Abstract: The invention relates to a method and an impregnation vessel where the bulk volume of impregnation liquor added is in form of hot black liquor having a residual alkali content. Hot black liquor is added in an upper central pipe supplying the hot black liquor as impregnation liquor and flashing off steam for driving off air from the comminute cellulose material. During this first steaming is the wood acidity released from the material and spent impregnation liquor with wood acidity content is withdrawn from an upper withdrawal screen to recovery, a lower withdrawal screen recirculates the remaining impregnation liquor to a second lower central pipe in order to equalize the alkali content well before the remaining retention time in the impregnation vessel. According to the invention is additional alkali added to the hot black liquor and the recirculated impregnation liquor respectively dependent on established alkali level in the liquor withdrawn from the upper withdrawal screen and the alkali level established below the lower withdrawal screen.
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公开(公告)号：US20180105982A1
公开(公告)日：2018-04-19
申请号：US15556709
申请日：2016-03-11
Applicant: Andritz Inc.
Inventor： Antti LUUKKONEN , Christian RADHUBER
Abstract: A system and process of producing pulp from lignocellulosic material after the lignocellulosic material has undergone compression (pressurization), maceration and removal of extractives produced during compression and maceration followed by chemical addition, fiberization, digestion (cooking) and further mechanical refining.
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公开(公告)号：US09777429B2
公开(公告)日：2017-10-03
申请号：US15128285
申请日：2014-03-31
Applicant: Marinko Mikulic
Inventor： Marinko Mikulic
CPC classification number: D21C3/24 , D21C3/02 , D21C3/06 , D21C3/18 , D21C5/00 , D21C7/06 , D21C7/08 , D21C9/10 , D21H11/12
Abstract: A continuous process for production of cellulose pulp from grass-like plant feedstock for paper making. The process includes: preparing the grass-like plant feedstock by comminuting, dedusting, continuous digestion, disperging, diluting the cellulose pulp, screening and fractionation, concentration to remove black liquor, dilution with fresh water, and, optionally, pulp bleaching processes. The continuous digestion is performed in the vertical column at 70-100° C. for 40 minutes to 2 hours; average composition of thus formed digestion suspension is maintained within the following ranges: 0.9-1.5% w/w of NaOH; 0.15-0.4% w/w of NaCl or Na2SO3; and 15-18% w/w of grass-like plant feedstock; concentrations of ingredients being calculated on the weight of the liquid phase. Screening and fractionation are resulting with two fractions; one being further processed by milling, and another being further processed to final pulp with or without bleaching processes. The preferred grass-like feedstock for the process is miscanthus/Miscanthus×giganteus, Andersson/.
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公开(公告)号：US20170022663A1
公开(公告)日：2017-01-26
申请号：US15283711
申请日：2016-10-03
Applicant: Valmet AB
Inventor： Mikael Lindstrom , Fredrik Wilgotson
Abstract: The method is for the preparation of kraft pulp with increased pulping yield from lignin-containing cellulosic material using polysulfide cooking liquor. In order to increase carbohydrate stabilization and hence the yield from a kraft cooking process a first impregnation stage using polysulfide cooking liquor is implemented at high alkali and polysulfide concentration and at a low temperature. Knots are added to a high-pressure conduit extending between an impregnation vessel and a digester.
Abstract translation: 该方法是使用多硫化物蒸煮液从含木质素的纤维素材料制备具有增加的制浆产率的牛皮纸浆。 为了增加碳水化合物的稳定性，因此从硫酸盐蒸煮工艺得到的产率，使用多硫化物蒸煮液的第一浸渍阶段是在高碱和多硫化物浓度和低温下进行的。 将结点加入到在浸渍容器和蒸煮器之间延伸的高压管道中。
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5.发明授权公开(公告)号：US08974633B2
公开(公告)日：2015-03-10
申请号：US13505809
申请日：2010-11-04
Applicant: Anders Samuelsson
Inventor： Anders Samuelsson
CPC classification number: D21C7/06 , D21C7/08 , F04D7/045 , F04D29/688
Abstract: The system and method is for the pumping of finely divided cellulose material to a continuous digester. The system has a concentric arrangement of pipes. A fluid (Liq) is added to a chamber formed between the pipes to establish a cylindrical film of fluid around a rod-shaped flow of cellulose material before the inlet to the pump. It is possible in this way to reduce the pressure drop in the lines, reduce wear in the pump, and ensure a maximal pressure build up in the pump.
Abstract translation: 该系统和方法用于将细碎的纤维素材料泵送到连续的蒸煮器。 该系统具有同心排列的管道。 将流体（Liq）添加到形成在管之间的室中，以在泵的入口之前在纤维素材料的棒状流周围形成圆柱形的流体膜。 以这种方式可以减少管路中的压降，减少泵中的磨损，并确保在泵中产生最大的压力。
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Patent Agency Ranking
6.发明授权Method and arrangement for adding treatment liquors to cellulose material in a down flow vessel 有权将处理液添加到下流式容器中的纤维素材料的方法和装置公开(公告)号：US08852395B2
公开(公告)日：2014-10-07
申请号：US14006969
申请日：2011-03-25
Applicant: Daniel Trolin , Fredrik Wilgotson
Inventor： Daniel Trolin , Fredrik Wilgotson
Abstract: The method and arrangement are for adding treatment liquid to comminuted cellulose material, preferably wood chips, during the manufacture of chemical pulp in a continuous process. The process is using a down-flow vessel wherein chips are descending down the vessel in a plug flow and wherein treated chips are continuously fed out at the bottom of the vessel. By arranging at least one telescopic pipe inside the vessel that extends down into the plug flow makes it possible to adjust the position for the addition of treatment liquid depending on current operational parameters.
Abstract translation: 该方法和装置用于在连续过程中在化学纸浆的制造期间将处理液添加到经粉碎的纤维素材料，优选木屑。 该方法使用下流式容器，其中芯片以容器流动方式沿着容器下降，并且其中经处理的碎屑在容器的底部连续送出。 通过在容器内布置至少一个向下延伸到塞子流中的伸缩管，可以根据当前的操作参数调整加入处理液的位置。
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公开(公告)号：US08795468B2
公开(公告)日：2014-08-05
申请号：US13808962
申请日：2010-07-09
Applicant: Jonas Saetherasen , Kent-Olof Karlsson
Inventor： Jonas Saetherasen , Kent-Olof Karlsson
Abstract: The withdrawal screen section is for impregnation of chips during the manufacture of chemical pulp. Chips are steamed and impregnated in a low pressure impregnation vessel using pressurized hot spent cooking liquor BL. The spent cooking liquor produces most of the steam BLST necessary for steaming the chips. To reduce the need for adding fresh steam for chip steaming is a first withdrawal section in the impregnation vessel modified to be used both as a flash tank for warm pressurized wash filtrate and improved wash-out feature for the spent impregnation liquid behind the screen in the withdrawal section. The withdrawal volume is arranged with an upper part located above the liquid level LIQLEV of the impregnation vessel. Additional pressurized warm wash liquor REC1 is added to the withdrawal volume and flashed off steam is led in a steam duct to the chip volume above the liquid level.
Abstract translation: 退出筛选部分用于在化学纸浆的制造过程中浸渍碎屑。 使用加压的热废蒸煮液BL将芯片蒸干并浸渍在低压浸渍容器中。 用过的蒸煮酒生产蒸发芯片所需的大部分蒸汽BLST。 为了减少添加用于芯片蒸煮的新鲜蒸汽的需要是浸渍容器中的第一抽出部分，其被修改为用作用于温热加压洗涤滤液的闪蒸罐和用于在屏幕后面的废浸渍液体的改进的洗出特征 退款部分。 排出容积设置有位于浸渍容器的液面LIQLEV上方的上部。 附加的加压温洗液REC1被加入到提取体积中，并且蒸发的蒸汽在蒸汽管道中被引导到高于液面的芯片体积。
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8.发明授权Two vessel reactor system and method for hydrolysis and digestion of wood chips with chemical enhanced wash method 有权采用化学增强洗涤法的双层釜反应器系统及木屑水解消解方法公开(公告)号：US08734610B2
公开(公告)日：2014-05-27
申请号：US12114856
申请日：2008-05-05
Applicant: Namhee Shin , C. Bertil Stromberg , Ventzislav H Kirov , William J. Cann
Inventor： Namhee Shin , C. Bertil Stromberg , Ventzislav H Kirov , William J. Cann
CPC classification number: D21C3/26 , D21C1/02 , D21C1/04 , D21C3/02 , D21C3/24 , D21C7/00 , D21C7/06 , D21C7/14
Abstract: A reactor vessel system including: a first reactor vessel having a hydrolysate and liquid extraction screen, a first region above the extraction screen that is maintained at conditions promoting a hydrolysis reaction in the cellulosic material, a second region below the extraction screen in which the hydrolysis is substantially suppressed and a wash liquid inlet below the extraction screen providing wash liquid at a temperature below a hydrolysis temperature; a transport pipe having an inlet coupled to the first reactor vessel and an outlet coupled to a second reactor vessel, and the second reactor vessel includes a liquid discharge that extracts a portion of liquid from the second reactor vessel and directs the portion of liquid to the first reactor vessel or to the transport pipe.
Abstract translation: 一种反应器容器系统，包括：具有水解液和液体提取筛的第一反应器容器，在提取筛网上方的第一区域，其保持在促进纤维素材料中的水解反应的条件下，提取筛网下面的第二区域，其中水解 基本上被抑制，并且在提取筛下方的洗涤液入口在低于水解温度的温度下提供洗涤液; 输送管，其具有连接到第一反应器容器的入口和连接到第二反应器容器的出口，并且第二反应器容器包括液体排出物，其从第二反应器容器中提取一部分液体并将液体部分引导到 第一反应堆容器或运输管道。
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9.发明授权Methods and devices for continuous transfer of particulate and/or fibrous material between two zones with different temperatures and pressures 有权用于在具有不同温度和压力的两个区域之间连续转移颗粒和/或纤维材料的方法和装置公开(公告)号：US08691050B2
公开(公告)日：2014-04-08
申请号：US13130748
申请日：2009-11-23
Applicant: Børge Holm Christensen
Inventor： Børge Holm Christensen
CPC classification number: D21C7/06 , C12P2201/00 , D21B1/22 , Y02E50/16
Abstract: Continuous transfer of particulate material into pressurized steam reactors is provided by “flow feeder” methods and devices. Material such as lignocellulosic biomass feedstocks are compacted into a “low density” plug,
Abstract translation: 通过“流动给料器”方法和装置提供颗粒材料连续转移到加压蒸汽反应器中。 诸如木质纤维素生物质原料的材料被压实成<700kg / m 3的“低密度”塞子，通过利用蒸汽冷凝区域提供对加压蒸汽的动态密封。 蒸汽冷凝区移动到“低密度”塞中的速率被压实的材料进入加压反应器的速率所抵消。 优选的装置通过使用抵抗由卸载装置提供的反压作用的装载装置在流动给料室内紧凑的材料。 压实的材料被主动分解并通过卸载装置进料到反应器中。 在优选实施例中，压实材料在稳态操作中进料，其中蒸汽冷凝区域和低压入口区域之间的界面在流动给料室内保持静止。
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公开(公告)号：US20130098569A1
公开(公告)日：2013-04-25
申请号：US13441776
申请日：2012-04-06
Applicant: Richard Constantine van Lee , Alagaratnam Joseph Devanesan
IPC: D21C7/00
Abstract: A method and system for pulp manufacturing used in connection with a kraft process includes a vertical pressure vessel operated in batch mode, a single-vessel or multi-vessel continuous digester, and other equipment for further processing brown stock, such as for washing, oxygen delignification, bleaching, and drying. A feeder and conveyance system may include a high pressure feeder or direct pump system, and selectively provides fiber-containing material to the continuous digester when making lower grade pulp product and to the vertical pressure vessel when making higher grade pulp such as dissolving pulp. The vertical pressure vessel is used for pre-hydrolysis and neutralization, after which the resulting pulp is fed to the continuous digester for cooking. White liquor and black liquor from the same mill may be used for the neutralization fluids. The same continuous digester is selectively used for cooking in connection with making pulp products of different grades or quality.
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