公开(公告)号：US11512426B2

公开(公告)日：2022-11-29

申请号：US14907384

申请日：2014-07-25

申请人： Rainer Fülling

发明人： Rainer Fülling ,  Heiko Schlabach

IPC分类号： D21C1/10 ,  D21C5/02 ,  C08H8/00 ,  C08L1/02 ,  D21C1/00 ,  C08B1/00 ,  D21C3/22 ,  D21C3/02 ,  D21C7/14 ,  C08L97/02 ,  D21C7/00 ,  D21C11/00 ,  D21C11/04 ,  D21C9/08

摘要： The present invention relates to a process for obtaining cellulose or a mixture containing at least cellulose and at least lignocellulose from at least one substrate that is at least to some extent amenable to fermentation comprising at least the steps of (1) to (3) and optionally (4), namely conversion of the substrate via addition of at least one inorganic base into an aqueous mixture with pH≥8.5 (step 1), ultrasound treatment of the aqueous mixture obtained after step (1) (step 2), separation of the aqueous mixture obtained after step (2) into a liquid aqueous phase and a disperse mixture containing, cellulose or a mixture containing at least cellulose and at least lignocellulose (step 3) and optionally purification of the disperse mixture obtained after step (3) containing cellulose or of the mixture containing at least cellulose and at least lignocellulose (step 4), where step (1) and step (2) of the process respectively are carried out at a temperature

公开(公告)号：US10329713B2

公开(公告)日：2019-06-25

申请号：US15123949

申请日：2015-03-04

申请人： ANDRITZ OY

发明人： Johan Engstrom ,  Paivi Ketonen ,  Peter Koistinen

IPC分类号： D21C11/00 ,  D21C1/02 ,  D21C7/10 ,  D21C7/14

摘要： The present invention relates to a method of producing steam at a digester plant of a chemical pulp mill. Black liquor is discharged from the digester at a first temperature and pressure. The black liquor is treated in a flash tank for generating flashed black liquor and flash steam at a second temperature and a second pressure, which are lower than the first temperature and pressure. The flashed black liquor is taken for further treatment to the evaporation plant. The flash steam is led to an indirect heat exchange contact with clean liquid in the reboiler for boiling the liquid and for generating steam. The steam is led from the reboiler into a fan or compressor for increasing the steam pressure to a third pressure, which is higher than the second pressure and for adjusting the pressure of the steam in the flash tank. Steam at a third pressure is used for pretreating comminuted cellulosic fiber material, such as chips, prior to cooking.

公开(公告)号：US09915030B2

公开(公告)日：2018-03-13

申请号：US14662879

申请日：2015-03-19

申请人： CNH Industrial Canada, Ltd.

发明人： James Henry ,  Satyanarayan Panigrahi ,  Radhey Lal Kushwaha

IPC分类号： D21C7/12 ,  D21C7/14 ,  D21C9/06 ,  D06L1/12 ,  D21C9/00 ,  D21C9/10

CPC分类号： D21C9/06 ,  D06L1/12 ,  D10B2201/01 ,  D21C7/12 ,  D21C7/14 ,  D21C9/005 ,  D21C9/007 ,  D21C9/10

摘要： According to one aspect of the present disclosure, a mechanism and method is provided to clean and remove or separate cellulose fibers from the source fibrous material without stressing and/or damaging the cellulose fibers. The mechanism includes an agitator that directs the washing fluid in a vertical direction into engagement with the fibrous material to effect maximum cleaning of the cellulose from the remainder of the fibrous material without damaging or stressing the cellulose, thereby providing cellulose that can enhance the strength and other beneficial characteristics of a biocomposite material formed using the cellulose.

公开(公告)号：US20070137806A1

公开(公告)日：2007-06-21

申请号：US11304250

申请日：2005-12-15

申请人： Manpreet Sidhu

发明人： Manpreet Sidhu

IPC分类号： D21C7/14 ,  G01N33/34

CPC分类号： D21D1/002

摘要： A technique for latency removal which can be effected without introducing a significant lag time can advance analysis of pulp for feedback control thermo-mechanical pulp applications. The process for analyzing a pulp material includes: (a) collecting a representative sample of the pulp material, (b) adjusting the consistency of the sample to yield an adjusted pulp sample, (c) employing a disintegrator to release latency from the pulp that is in the adjusted pulp sample to form a pulp composition that is substantially free of latent properties, and (d) analyzing the pulp composition to measure at least one pulp quality.

摘要翻译： 可以在不引入显着滞后时间的情况下进行等待时间去除的技术可以推进用于反馈控制热机械纸浆应用的纸浆分析。 用于分析纸浆材料的方法包括：（a）收集纸浆材料的代表性样品，（b）调节样品的稠度以产生经调节的纸浆样品，（c）使用崩解剂释放纸浆的潜伏期， 在调节的纸浆样品中以形成基本上没有潜在性质的纸浆组合物，和（d）分析纸浆组合物以测量至少一种纸浆质量。

公开(公告)号：US6165323A

公开(公告)日：2000-12-26

申请号：US248005

申请日：1999-02-10

申请人： Jay K. Shearer

发明人： Jay K. Shearer

IPC分类号： D21C7/00 ,  D21C7/14 ,  D21D5/16

CPC分类号： D21C7/14 ,  D21D5/16

摘要： A screen assembly particularly adapted to be used in a continuous or batch digester in the production of cellulose (chemical) pulp utilizes a particular screen plate construction that enhances productivity while minimizing blockage of the screen slots (and subsequent non-uniformities in the pulp produced when the screen is blocked). A screen plate having a convex outer surface and concave inner surface (substantially an arc of between 20-60 degrees) is pivotally connected for movement about a vertical axis on one side edge to frame mounted in the digester. The screen plate has a plurality of slots (e.g. 2-13 mm wide) machined in it, and the screen plate is positioned in the digester so that the inclination angle of the slots relative to the horizontal or vertical is between 30-60 (e.g. about 45) degrees. A plurality of land areas are provided between regions of the slots in screen plate. A plurality of support pins may be connected (e.g. welded) to the screen plate outer surface and extend outwardly from it. The support pins in different land areas are offset from each other and may be disposed in an imaginary straight line that make an angle substantially the same as the angle of the slots with respect to the horizontal or vertical. Preferably the slots taper outwardly at the outer surface at an angle of between about 10-60 (e.g. about 30) degrees.

摘要翻译： 特别适用于在纤维素（化学）纸浆生产中的连续或间歇式蒸煮器中使用的筛网组合体采用特定的筛板结构，其提高了生产率，同时最小化了筛网槽的阻塞（以及随后的纸浆产生的随后的非均匀性 屏幕被屏蔽）。 具有凸形外表面和凹形内表面（基本上为20-60度之间的弧度）的筛板被枢转地连接以便在安装在蒸煮器中的框架的一侧边缘上垂直轴线移动。 筛板具有在其中加工的多个槽（例如2-13mm宽），并且筛板位于蒸煮器中，使得槽相对于水平或垂直的倾斜角度在30-60之间（例如， 约45）度。 在屏板的槽的区域之间设置多个区域。 多个支撑销可以连接（例如焊接）到筛板外表面并从其向外延伸。 不同的陆地区域中的支撑销彼此偏移并且可以设置在假想的直线中，该假想直线与槽相对于水平或垂直的角度基本上相同。 优选地，狭槽在外表面以约10-60（例如约30）度的角度向外锥形。

公开(公告)号：US6159337A

公开(公告)日：2000-12-12

申请号：US414887

申请日：1999-10-08

申请人： Bruno S. Marcoccia ,  J. Robert Prough ,  Richard O. Laakso ,  Joseph R. Phillips ,  Rolf C. Ryham ,  Jan T. Richardsen ,  R. Fred Chasse

发明人： Bruno S. Marcoccia ,  J. Robert Prough ,  Richard O. Laakso ,  Joseph R. Phillips ,  Rolf C. Ryham ,  Jan T. Richardsen ,  R. Fred Chasse

IPC分类号： C08B1/00 ,  C08B15/00 ,  D21C3/02 ,  D21C3/22 ,  D21C3/24 ,  D21C7/00 ,  D21C7/12 ,  D21C7/14 ,  D21C9/02 ,  D21C11/00 ,  D21C11/02 ,  D21C11/04 ,  D21G7/00

CPC分类号： D21C3/02 ,  D21C11/0021 ,  D21C11/04 ,  D21C3/22 ,  D21C3/224 ,  D21C3/24 ,  D21C7/00 ,  D21C7/12 ,  D21C7/14 ,  D21C9/02 ,  D21G7/00

摘要： Kraft pulp of increased strength and bleachability may be produced with decreased consumption of effective alkali, and at a lower H factor, by keeping the dissolved organic material (DOM) concentration low substantially through the entire kraft cook, including by extracting high DOM liquid from at least one part of a continuous digester and replacing it wit much lower level DOM liquid. Existing pulp mills having two-vessel hydraulic, one-vessel hydraulic, or other systems may be retrofit to provide for extractions and additions of low DOM dilution liquor (including substantially DOM-free white liquor). Also, commercial size batch digesters (8 tons per day of pulp or more) can be operated with low DOM liquor to produce increased strength pulp. Using dilution with low DOM liquor also results in reduced H factor and effective alkali consumption, and increased bleachability.

摘要翻译： 通过将溶解的有机物质（DOM）浓度基本上保持在整个硫酸盐蒸煮中，包括通过从中提取高DOM液体，可以降低有效碱的消耗，并且在较低的H因子下生产具有增加的强度和漂白性的牛皮纸浆 连续消化器的至少一部分，并用较低级别的DOM液体代替。 可以改造具有双容器液压，单容器液压或其它系统的现有纸浆厂，以提供低DOM稀释液（包括基本上不含DOM的白液）的提取和添加。 此外，商业尺寸的批量蒸煮器（每天8吨纸浆或更多）可以用低DOM液体操作以产生增强的纸浆。 使用低DOM酒稀释还可以降低H因子和有效的碱消耗，并增加漂白性。

公开(公告)号：US6123808A

公开(公告)日：2000-09-26

申请号：US987772

申请日：1997-12-09

申请人： Grant E. Bechard ,  John Hefele ,  Larry W. Laakso ,  Mark D. Barrett ,  R. Fred Chasse

发明人： Grant E. Bechard ,  John Hefele ,  Larry W. Laakso ,  Mark D. Barrett ,  R. Fred Chasse

IPC分类号： D21C7/00 ,  D21C3/24 ,  D21C7/14

CPC分类号： D21C7/14 ,  D21C3/24

摘要： In a pulp treatment vessel, such as a kraft pulp continuous vertical digester, a cellulose slurry is caused to flow in the vessel interior in a flow path. A substantially annular void is formed at at least one point along the flow path, and dilution or treatment liquor is introduced into the substantially annular void so that the liquor is substantially uniformly distributed about the periphery of or into the slurry. The annular void may be formed by a step out in the vessel, and the uniform introduction of dilution liquor may be accomplished utilizing one or more openings, such as a plurality of openings substantially evenly spaced around the substantially annular void, e.g. using a screen surface. The screen surface may be substantially vertical or conical.

摘要翻译： 在纸浆处理容器中，例如牛皮纸浆连续立式蒸煮器，使纤维素浆液在流路中的容器内部流动。 在沿着流动路径的至少一个点处形成基本上环形的空隙，并且将稀释或处理液体引入基本上环形的空隙中，使得液体基本均匀地分布在浆料的周边或周围。 可以通过在容器中的步骤形成环形空隙，并且可以使用一个或多个开口来实现稀释液的均匀引入，例如基本上均匀地围绕基本上环形空隙间隔开的多个开口。 使用屏幕表面。 屏幕表面可以是基本垂直的或圆锥形的。

公开(公告)号：US6063238A

公开(公告)日：2000-05-16

申请号：US73192

申请日：1998-05-06

申请人： Anders Bergqvist ,  Johan Engstrom

发明人： Anders Bergqvist ,  Johan Engstrom

IPC分类号： D21C3/22 ,  D21C3/24 ,  D21C7/14 ,  D21C11/00

CPC分类号： D21C3/24 ,  D21C11/0021 ,  D21C3/22 ,  D21C7/14

摘要： The present invention relates to a digester and a method for continuously cooking kraft pulp in a single-vessel system (1), preferably a single-vessel hydraulic digester, with chips (2) being fed in at a first end (3) of the digester (1), white liquor (4) being added at at least one position at or near the said first end (3), the chips being impregnated in a cocurrent impregnation zone (5), the chips being cooked in a cooking zone (6) downstream of the impregnation zone, hot black liquor (7) being extracted from at least one extraction strainer section (8), and cooked pulp being discharged (9) at the other end of the digester, and hot black liquor (7) being added (11), (12) to the said impregnation zone (5), and the extract (13) from the first strainer section (14), which is arranged downstream of the position of addition (11a) of the said hot black liquor (7), being largely removed from the digester.

摘要翻译： 本发明涉及一种蒸煮器和一种在单容器系统（1）中连续烹制牛皮纸浆的方法，优选单容器液压消化器，其中芯片（2）在第一端（3）处进料 蒸煮器（1），在所述第一端（3）处或附近的至少一个位置处加入白液（4），将所述碎片浸渍在并流浸渍区（5）中，将所述碎片在烹饪区（ 6）在浸渍区的下游，从至少一个提取过滤器部分（8）提取热黑液（7），煮熟的纸浆在蒸煮器的另一端排出（9），热黑液（7） 在所述浸渍区域（5）中添加（11），（12）和来自所述第一过滤器部分（14）的提取物（13），其位于所述热黑色的添加位置（11a）的下游 酒（7），大部分从蒸煮器中取出。

公开(公告)号：US5851350A

公开(公告)日：1998-12-22

申请号：US771064

申请日：1996-12-20

申请人： Jukka Timperi

发明人： Jukka Timperi

IPC分类号： D21C7/08 ,  D21C7/14

CPC分类号： D21C7/14 ,  D21C7/08

摘要： Pumping of medium consistency cellulose pulp is effected from stand pipes or like small sized pulp vessels to which pulp is normally discharged from storage towers, treatment towers, washers, filters, presses, thickeners, or the like, particularly pumping of high temperature pulps from said stand pipes. A pump inlet is attached to a discharge opening of a stand pipe, pressurizing cellulose pulp in said stand pipe by closing the stand pipe off from the atmosphere, maintaining a superatmospheric pressure in the stand pipe, allowing the cellulose pulp to flow into the pump through the pump inlet, and pumping the cellulose pulp further using the pump.

摘要翻译： 中等稠度纤维素纸浆的泵送是从立管或类似小型纸浆容器进行的，纸浆通常从储存塔，处理塔，洗涤器，过滤器，压力机，增稠器等排出，特别是从所述 立管 泵入口连接到立管的排出口，通过将立管从大气中关闭而使立管中的纤维素纸浆加压，在立管中保持超大气压力，允许纤维素纸浆通过 泵入口，并使用泵进一步泵送纤维素浆。

公开(公告)号：US5824188A

公开(公告)日：1998-10-20

申请号：US712977

申请日：1996-09-12

申请人： J. Robert Prough ,  Bruno S. Marcoccia ,  Richard O. Laakso ,  Carl L. Luhrmann

发明人： J. Robert Prough ,  Bruno S. Marcoccia ,  Richard O. Laakso ,  Carl L. Luhrmann

IPC分类号： D21C3/02 ,  D21C3/22 ,  D21C3/24 ,  D21C7/00 ,  D21C7/12 ,  D21C7/14 ,  D21C9/02 ,  D21C11/00 ,  D21C11/04

CPC分类号： D21C3/224 ,  D21C11/0021 ,  D21C11/04 ,  D21C3/02 ,  D21C3/24 ,  D21C7/00 ,  D21C7/12 ,  D21C7/14 ,  D21C9/02

摘要： The sulfide ion concentration and sulfidity of kraft cooking liquor during kraft cooking of cellulose pulp is selectively increased. After treatment in a first treatment zone in which impregnation or kraft cooking takes place using a kraft cooking liquor having a first sulfide ion concentration and sulfidity, black liquor is extracted from the material, liquid is withdrawn from the material and dilution liquid is added to the withdrawn liquid and the withdrawn liquid with dilution liquid is reintroduced. In a second treatment zone after the first zone a second kraft cooking liquor is introduced having a second sulfide ion concentration and sulfidity greater than the first sulfide ion concentration and sulfidity (typically by about 20-50%), including by manipulating controlling the flow rate of extraction and the flow rates of withdrawal of liquid and addition of dilution liquid. The pressure of the continuous digester is controlled in a unique manner that avoids disruptions to the column of pulp continuously moving downwardly in the digester, anywhere in the digester, but particularly avoids non-uniform, unstable material in the countercurrent washing zone. The pressure is controlled by withdrawing liquid from, and introducing liquor into, the digester at at least one additional extraction-dilution loop aside from the main extraction of the digester and the wash dilution liquid introduction mechanism below the wash screens. Pressure can also be maintained (e.g. at about 130-170 psi) by also controlling the amount of wash dilution liquor, and by varying the extraction flow.

摘要翻译： 纤维素纸浆硫酸盐蒸煮时硫酸盐蒸煮液的硫化物离子浓度和硫化物有选择地增加。 在使用具有第一硫化物离子浓度和硫化物的硫酸盐蒸煮液进行浸渍或硫酸盐蒸煮的第一处理区域中处理之后，从该材料中提取黑液，从该物质中取出液体并将稀释液加入到 取出的液体和用稀释液体排出的液体被重新引入。 在第一区域之后的第二处理区域中，引入第二硫酸盐蒸煮液，其具有大于第一硫化物离子浓度和硫化物浓度的硫化物的第二硫离子浓度和硫化物（通常为约20-50％），包括通过控制流速 的提取液和液体的提取流量以及稀释液的添加量。 以独特的方式控制连续蒸煮器的压力，避免在蒸煮器中的任何地方在蒸煮器中连续向下移动的纸浆柱的中断，但是特别地避免了逆流洗涤区域中不均匀的不稳定的材料。 除了从洗涤屏幕下面的蒸煮器和洗涤稀释液引入机构的主要提取之外，在至少一个额外的提取 - 稀释回路中，从蒸煮器中抽出液体并将其引入到蒸煮器中来控制压力。 还可以通过控制洗涤稀释液的量以及通过改变提取流量来保持压力（例如约130-170psi）。