-
公开(公告)号：US5034128A
公开(公告)日：1991-07-23
申请号：US541510
申请日：1990-06-21
CPC分类号： D21C9/18
摘要： An apparatus for dewatering a pulp is described, comprising a vessel having a pulp chamber for pulp to be dewatered; a pulp inlet to the vessle; pulp outlet from the vessel; a filtrate chamber with an outlet for filtrate expelled from the pulp; a stationary cylindrical screen mounted within the vessel and defining said plup chamber and filtrate chamber on opposite sides thereof; and mechanical cleaning means supported by a shaft and disposed in the pulp chamber close to the screen face of the screen for removing a mat of pulp therefrom. The apparatus further comprises a backflushing means mounted outside the vessel and including a cylinder with first and second end portions and a piston mounted within the cylinder for reciprocal movement therein. The first end portion communicates with the interior of the apparatus, and the second end portion communicates with the filtrate chamber. Furthermore, the backflushing means comprises a power transmitting means for actuating the piston in the cylinder to move reciprocally in cycles each cycle comprising a slow stroke for drawing filtrate slowly into the cylinder and removing pulp slowly therefrom, and a fast stroke for expelling said drawn-in filtrate quickly out from the cylinder and drawing pulp quickly into the cylinder, said quickly expelled filtrate causing a backlfush through the screen.
摘要翻译： 描述了一种用于脱浆纸浆的设备，包括：具有用于要脱水的纸浆的纸浆室的容器; 纸浆入口到容器; 来自船只的纸浆出口; 具有从纸浆排出的滤液出口的滤液室; 安装在容器内的固定的圆柱形屏幕，并在其相对侧上限定所述柔软室和滤液室; 以及机械清洁装置，其由轴支撑并且设置在靠近筛网的筛面的纸浆室中，用于从中除去纸浆垫。 该装置还包括安装在容器外部的反冲洗装置，并且包括具有第一和第二端部的气缸和安装在气缸内用于在其中往复运动的活塞。 第一端部与装置的内部连通，第二端部与滤液室连通。 此外，反吹装置包括动力传递装置，用于致动气缸中的活塞，以循环方式循环移动，每个循环包括缓慢的冲程，用于将滤液缓慢地吸入气缸并从其中缓慢地除去纸浆，并且快速冲程用于排出所述拉伸 - 滤液快速从圆筒中取出并将纸浆快速拉入圆筒，表示快速排出的滤液导致通过筛网的反冲。
-
2.发明授权Chip bin with steaming control and a gas vent containing a vacuum and pressure relief device 失效具有蒸汽控制的切屑仓和包含真空和压力释放装置的排气口
公开(公告)号：US5547546A
公开(公告)日：1996-08-20
申请号：US317801
申请日：1994-10-04
摘要： A chip bin for wood chips in a continuous digester system includes internal steaming that is controlled in response to both the interior temperature across the level of chips in the bin, and the level of chips in the bin, so as to substantially prevent cool, non-condensible gas-laden chips from accumulating at the top of the chip column in the bin, and to substantially prevent steam blow-through. The temperature probe used in the chip bin has a temperature sensing portion with a length of about ten to twenty feet instead of the conventional five foot length, and extends across the level of the chips to a position about five feet below the level of chips. Control of steam added to the bin is provided utilizing a controller which controls the position of one or more valves in one or more steam conduits, each valve having multiple open positions and a closed position. A vacuum and pressure relief device is disposed in a non-condensible gases vent from the bin which minimizes the potential for gross gas flow variations across it. The relief device includes a solid interior peripheral portion of the vent, a gate mounted for pivotal movement by a pivot shaft, and a casing which is a cylindrical sector (having a sector angle of about 30.degree.-60.degree.) in which the gate pivots. The casing is mounted in the solid interior peripheral portion and a brush seal is provided between the gate and the cylindrical sector casing.
摘要翻译： 用于连续蒸煮器系统中的木片的碎片箱包括内部蒸汽，其响应于箱中的切屑水平的内部温度以及料仓中的切屑水平而被控制，以便基本上防止冷却， 可靠的气体填充芯片积聚在料斗中的芯片柱的顶部，并且基本上防止蒸汽吹过。 在芯片仓中使用的温度探测器具有温度感测部分，其长度大约为十到二十英尺，而不是传统的五英尺长度，并且延伸跨越芯片的水平到比芯片级别大约五英尺的位置。 通过控制一个或多个蒸汽导管中的一个或多个阀的位置，每个阀具有多个打开位置和关闭位置的控制器来提供加到箱中的蒸汽的控制。 真空和压力释放装置设置在不可冷凝的气体排放口中，从而最小化跨越其的总气体流量变化的可能性。 排气装置包括通气口的实心内周部分，安装用于通过枢轴枢转运动的门和作为门枢转的圆柱形部分（具有约30°-60°的扇形角）的壳体 。 壳体安装在实心内周部分中，并且在门和圆柱形扇形外壳之间设置有刷密封件。
-
公开(公告)号：USRE39208E1
公开(公告)日：2006-08-01
申请号：US10829477
申请日：2004-04-22
摘要： A comminuted cellulosic fibrous material treatment vessel assembly includes a substantially vertical vessel having a top, bottom, and outlet, and through which the material flows in a flow direction. The vessel preferably has a substantially cylindrical wall with at least one diameter-changing transition between the inlet and the outlet. A screen assembly is preferably provided at or just past the transition. The screen assembly comprises one or more annular screen surfaces diverging in the flow direction of the material, the angle of divergence being between about 0.5-10° to the vertical, and preferably substantially continuous. Providing such a screen assembly reduces the radial compression of material thereon, and increases the volume and rate of liquid that can flow through the material and be removed through the screen surface compared to a non-diverging screen surface (that is a right-cylindrical surface). The screen surface has openings of substantially uniform size, and preferably with a substantially uniform percentage of open area, in the flow path.
-
4.发明授权Bleaching cellulose pulp having cleanliness which varies significantly over time using at least two different bleaching stages and bleaching chemicals 失效使用至少两种不同的漂白阶段和漂白化学品，漂白纤维素纸浆具有随时间变化的清洁度
公开(公告)号：US6153300A
公开(公告)日：2000-11-28
申请号：US229086
申请日：1994-04-18
CPC分类号： D21C9/1057 , D21C5/02 , D21C9/1026 , Y02W30/648 , Y10T428/2913 , Y10T428/2964 , Y10T428/2965 , Y10T428/2967 , Y10T428/2975 , Y10T428/2978
摘要： Recycled paper pulp having at least two different types of paper which consume widely different amounts of bleaching chemical, or mixed hardwood and soft-wood pulps, are treated in a manner that enhances distribution and redistribution of bleaching chemical to enhance uniformity of the bleaching treatment. The pulp is intensely mixed to provide a homogenous mixture of fibrous material and bleaching chemical, and then is continuously or intermittently subjected to mechanical action (such as in low intensity mixers, or by agitating pulp in a retention tank) of sufficient intensity and duration so as to enhance distribution and redistribution of a bleaching chemical. Also, recycled pulp will have cleanliness which varies significantly over time, and this is accommodated by sensing at least one of the brightness, color, or lignin content (e.g. all three) of the pulp prior to treatment in a first bleaching stage, controlling the quantity of first bleaching chemical added to the first stage in response to at least one of the brightness, color, or lignin content sensing to achieve a target brightness increase for the first stage, and then repeating the sensing and quantity control steps for a second and subsequent stages. Alternatively all sensing can be done initially. Within a stage, a valve may be controlled to subject the pulp to a second treatment in that stage, or to pass it out of the stage to the next stage, depending upon cleanliness.
摘要翻译： 使用具有消耗大量不同量的漂白化学品或混合的硬木和软木纸浆的至少两种不同类型的纸的回收纸浆以增强漂白化学品的分配和再分配以增强漂白处理的均匀性的方式进行处理。 将纸浆强烈混合以提供纤维材料和漂白化学品的均匀混合物，然后以足够的强度和持续时间连续或间歇地进行机械作用（例如在低强度混合器中或通过在保留罐中搅拌纸浆），以便 以增强漂白化学品的分配和再分配。 回收纸浆的清洁度也随着时间而显着变化，这通过在第一漂白阶段中检测处理之前的纸浆的亮度，颜色或木质素含量（例如全部三种）中的至少一种来控制数量 响应于亮度，颜色或木质素含量感测中的至少一种，第一漂白化学品添加到第一阶段，以实现第一阶段的目标亮度增加，然后再次对第二阶段和随后的感测和数量控制步骤进行再次测试 阶段 所有感觉都可以在初期完成。 在一个阶段内，根据清洁度，可以控制阀门使纸浆在该阶段进行第二次处理，或将其从阶段转移到下一阶段。
-
公开(公告)号：US6129816A
公开(公告)日：2000-10-10
申请号：US953880
申请日：1997-10-24
摘要： A comminuted cellulosic fibrous material treatment vessel assembly includes a substantially vertical vessel having a top, bottom, and outlet, and through which the material flows in a flow direction. The vessel preferably has a substantially cylindrical wall with at least one diameter-changing transition between the inlet and the outlet. A screen assembly is preferably provided at or just past the transition. The screen assembly comprises one or more annular screen surfaces diverging in the flow direction of the material, the angle of divergence being between about 0.5-10.degree. to the vertical, and preferably substantially continuous. Providing such a screen assembly reduces the radial compression of material thereon, and increases the volume and rate of liquid that can flow through the material and be removed through the screen surface compared to a non-diverging screen surface (that is a right-cylindrical surface). The screen surface has openings of substantially uniform size, and preferably with a substantially uniform percentage of open area, in the flow path.
摘要翻译： 粉碎的纤维素纤维材料处理容器组件包括具有顶部，底部和出口的基本垂直的容器，材料通过该容器在流动方向上流动。 容器优选地具有基本上圆柱形的壁，在入口和出口之间具有至少一个直径变化的过渡。 屏幕组件优选地设置在过渡处或刚刚过渡处。 屏幕组件包括在材料的流动方向上发散的一个或多个环形屏幕表面，发散角在垂直之间约0.5-10°，优选地基本上连续。 提供这种屏幕组件减少了其上的材料的径向压缩，并且与不发散的屏幕表面（即，右圆柱表面）相比，增加了可流过材料并且通过屏幕表面移除的液体的体积和速率 ）。 屏幕表面具有在流动路径中具有基本上均匀的尺寸，并且优选地具有基本均匀的开放面积百分比的开口。
-
公开(公告)号：US5849150A
公开(公告)日：1998-12-15
申请号：US775197
申请日：1996-12-30
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 with 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，并用更低级别的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：US5547012A
公开(公告)日：1996-08-20
申请号：US127548
申请日：1993-09-28
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 with 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.
-
公开(公告)号：US5328564A
公开(公告)日：1994-07-12
申请号：US836585
申请日：1992-02-18
摘要： Kraft pulp is bleached to a brightness of about 90 CPPA or greater, without the use of chlorinated organic compounds that has commercially acceptable strength properties. During production of the kraft pulp it is subjected to extended delignification, by adding kraft white liquor to a first recirculation loop in the digester, and/or a second, wash, recirculation loop in the digester; or by conventional pulping followed by two oxygen stages, with washing between the stages. The extended delignification pulp is then subjected to ozone bleaching, with an ozone dosage of less than 1.0% (preferably less than about 0.5%). The ozone bleaching sequence may be a (ZE)P(ZE)P sequence.
摘要翻译： 牛皮纸浆漂白至约90CPPA或更高的亮度，而不使用具有商业上可接受的强度性能的氯化有机化合物。 在牛皮纸浆的生产过程中，通过在蒸煮器中的第一再循环回路中加入牛皮纸白液，和/或在蒸煮器中的第二个洗涤循环回路，对其进行扩展的脱木质素; 或通过常规制浆，然后是两个氧气阶段，并在阶段之间进行洗涤。 然后对延长的脱木素纸浆进行臭氧漂白，臭氧剂量小于1.0％（优选小于约0.5％）。 臭氧漂白序列可以是（ZE）P（ZE）P序列。
-
公开(公告)号：US4944842A
公开(公告)日：1990-07-31
申请号：US40245
申请日：1987-03-26
IPC分类号： D21C9/10
CPC分类号： D21C9/1026
摘要： Method and apparatus for reducing contamination in processed pulp and in white water effluent discharged from a pulp dryer or paper making mill. The system includes multiple pulp bleaching and washing stages wherein white water effluent discharge from the dryer or paper making mill is fed to the next-to-last washing stage and fresh water is supplied to the last washing stage.
摘要翻译： 用于减少加工纸浆和从纸浆干燥机或造纸厂排出的白水废水中污染的方法和装置。 该系统包括多个纸浆漂白和洗涤阶段，其中将来自干燥机或造纸厂的白水流出物排出到下一个洗涤阶段，并将淡水供应到最后一个洗涤阶段。
-
10.发明授权公开(公告)号：US06576084B1
公开(公告)日：2003-06-10
申请号：US09658910
申请日：2000-09-12
IPC分类号： D21C320
摘要： Chemical pulp is produced from a slurry of comminuted cellulosic fibrous material using a beneficial additive such as AQ, or polysulfide. In the first treatment zone the effective alkali concentration and temperature conditions are such so that substantially no alkali degradation of the cellulose occurs, but so that the material is effectively impregnated with the additive. Then the material is treated with an alkaline cooking liquor, at cooking temperature, to produce a chemical cellulose pulp with higher yield or strength than if the low temperature, low alkali, additive pretreatment was not practiced. Typical alkali and temperature conditions in the first zone are less than 10 g/l expressed as NaOH, and between about 80-130° C., e.g. about 80-110° C. The first zone is preferably a feed system (which may include a separate impregnation vessel) for a continuous digester, while cooking is in a continuous digester.
摘要翻译： 使用有益的添加剂如AQ或多硫化物由粉碎的纤维素纤维材料的浆料生产化学纸浆。 在第一处理区域中，有效的碱浓度和温度条件使得基本上不会发生纤维素的碱降解，而是使材料有效地浸渍添加剂。 然后在烹调温度下用碱性蒸煮液处理该材料，以产生比没有实施低温，低碱添加剂预处理更高的产率或强度的化学纤维素纸浆。 第一区中典型的碱和温度条件小于10g，以NaOH表示，在约80-130℃之间，例如， 约80-110℃。第一区域优选是用于连续蒸煮器的进料系统（其可以包括单独的浸渍容器），同时烹饪在连续蒸煮器中。
-
-
-
-
-
-
-
-
-
搜索结果
35 条记录 (耗时 0.183 秒)