公开(公告)号：US4216054A

公开(公告)日：1980-08-05

申请号：US836449

申请日：1977-09-26

申请人： Jozef M. Bentvelzen ,  Steven L. Bogart ,  Maharaj K. Gupta ,  William T. McKean ,  Michael D. Meredith ,  Louis O. Torregrossa

发明人： Jozef M. Bentvelzen ,  Steven L. Bogart ,  Maharaj K. Gupta ,  William T. McKean ,  Michael D. Meredith ,  Louis O. Torregrossa

IPC分类号： D21C9/10

CPC分类号： D21C9/1073

摘要： A slurry of cellulosic fiber and water having a consistency in the range of 0.017-4.9% of the total ungassed weight of fiber and water is bleached with ozone. This is done without the usual addition of organic additives. The water can include impurities created by the bleaching process. Rapid reaction times under 8 minutes and preferably under 5 minutes are achieved.The reaction is enhanced in the consistency range of about 0.017-0.7%.The slurry is mixed using a mixing energy of 0.002-1.0 horsepower per cubic foot of gassed slurry. The mixing energy will determine whether the gas-liquid or liquid-solid interface will limit the speed of the reactions. The passage of ozone from the gas to a liquid phase will be the limiting factor below about 0.2 horsepower per cubic foot of gassed slurry. The increasing presence of ozone in the liquid as the horsepower increases from about 0.2 to about 0.4 horsepower per cubic foot of gassed slurry indicates this is a zone in which both the gas-liquid and the liquid-solid interface are limiting factors. Above about 0.4 horsepower per cubic foot of gassed slurry the liquid-solid interface will be the limiting factor.Superficial velocity of the ozone bearing gas is in a range of 200-3800 feet per hour. The ozone usually is 0.05-6% by weight of the total weight of the gas.

摘要翻译： 将纤维素纤维和水的浆液在纤维和水的总未脱气重量的0.017-4.9％的范围内与臭氧一起漂白。 没有通常添加有机添加剂就可以完成。 水可以包括由漂白过程产生的杂质。 8分钟以下，优选5分钟以下快速反应时间。 该反应在约0.017-0.7％的一致性范围内得到增强。 使用0.002-1.0马力/立方英尺充气浆料的混合能量将浆料混合。 混合能量将决定气液或液 - 固界面是否会限制反应的速度。 臭氧从气体通到液相将是每立方英尺充气浆料低于约0.2马力的限制因素。 臭氧在液体中的增加的存在随着马力从每立方英尺充气浆料的约0.2至约0.4马力的增加表明这是气液和液 - 固界面都是限制因素的区域。 高于约0.4马力/立方英尺的充气浆液液固界面将成为限制因素。 含臭氧气体的表观速度在每小时200-3800英尺的范围内。 臭氧通常为气体总重量的0.05-6重量％。

公开(公告)号：US4295927A

公开(公告)日：1981-10-20

申请号：US48917

申请日：1979-06-15

申请人： Jozef M. Bentvelzen ,  Michael D. Meredith ,  Henry Bepple ,  Louis O. Torregrossa ,  Howard R. Battan ,  Dennis H. Justice

发明人： Jozef M. Bentvelzen ,  Michael D. Meredith ,  Henry Bepple ,  Louis O. Torregrossa ,  Howard R. Battan ,  Dennis H. Justice

IPC分类号： D21B1/16 ,  D21B1/34 ,  D21C9/00 ,  D21C9/10 ,  D21D1/30 ,  D21D5/28

CPC分类号： D21C9/004 ,  D21B1/16 ,  D21B1/342 ,  D21C9/1068 ,  D21D1/30

摘要： A wood pump slurry is treated with oxygen in a mill with little change to the process or structure of the mill. No special pressure tanks are required. The consistency of the pulp need not be altered for the treatment step. It may be treated at the usual process consistency of the pulp; e.g., it may be treated at the usual consistency of the pulp leaving a washer or subsequent steam mixer without additional dewatering or additional dilution.The oxygen is added into a closed section of the system so that it cannot immediately vent to the atmosphere. Alkali should also be present when the oxygen is mixed with the slurry. The mixing should occur near to the point of oxygen addition.The oxygen is inserted into the pulp slurry and mixed with the pulp slurry between a washer and the subsequent storage tank.The mixing occurs in a relatively small mixter that intensively mixes the slurry and gas. The mixer has a mixing zone with a swept area of 10,000 to 1,000,000 square meters per metric ton of oven-dry pulp. A preferred range is 25,000 to 150,000 square meters per metric ton of oven-dry pulp and an optimum range of around 65,400 square meters per metric ton of oven-dry pulp.Other systems and specific mixer designs are also disclosed.

摘要翻译： 在磨机中用氧气处理木浆泵浆料，对轧机的工艺或结构几乎没有变化。 不需要特殊的压力罐。 对于处理步骤，不需要改变纸浆的稠度。 可以按照纸浆的通常工艺一致性进行处理; 例如，可以以离开洗涤器或随后的蒸汽混合器的纸浆的通常稠度进行处理，而无需额外的脱水或额外的稀释。 将氧气加入系统的封闭部分，使其不能立即排放到大气中。 当氧气与浆料混合时，碱也应存在。 混合应发生在加氧附近。 将氧气插入纸浆中并与浆料在洗涤器和随后的储罐之间混合。 混合发生在相当小的混合器中，其密集地混合浆料和气体。 混合器具有混合区，扫地面积为10,000至100万平方米，每公吨烘干纸浆。 每公吨烘干纸浆的优选范围是25,000至15万平方米，每公吨干燥纸浆的最佳范围约为65,400平方米。 还公开了其他系统和特定混合器设计。

公开(公告)号：US4295925A

公开(公告)日：1981-10-20

申请号：US48935

申请日：1979-06-15

申请人： Jozef M. Bentvelzen ,  Michael D. Meredith ,  Henry Bepple ,  Louis O. Torregrossa ,  Howard R. Battan ,  Dennis H. Justice

发明人： Jozef M. Bentvelzen ,  Michael D. Meredith ,  Henry Bepple ,  Louis O. Torregrossa ,  Howard R. Battan ,  Dennis H. Justice

IPC分类号： D21B1/16 ,  D21C9/00 ,  D21C9/10 ,  D21D1/30 ,  D21C9/04 ,  D21D5/28

CPC分类号： D21C9/004 ,  D21B1/16 ,  D21C9/1068 ,  D21D1/30

摘要： Washed wood pulp from a continuous digester is treated with oxygen in the blow line from the digester. Most of the treatment occurs within the mixer. The mixer has a mixing zone with a swept area of 10,000 to 1,000,000 square meters per metric ton of oven-dry pulp. A preferred range is 25,000 to 150,000 square meters per ton of oven-dry pulp and an optimum range is around 65,400 square meters per metric ton of oven-dry pulp. Following mixing, the pulp may be taken to a subsequent process, a diffusion washer, or to a storage tank.

摘要翻译： 来自连续蒸煮器的洗涤木浆在来自蒸煮器的吹制管线中用氧气处理。 大多数治疗发生在混合器内。 混合器具有混合区，扫地面积为10,000至100万平方米，每公吨烘干纸浆。 每吨烘干纸浆的优选范围为25,000至15万平方米，最佳范围为每公吨干燥纸浆约65,400平方米。 在混合之后，纸浆可以被带到随后的过程，扩散洗涤器或储存罐中。

公开(公告)号：US4298426A

公开(公告)日：1981-11-03

申请号：US48936

申请日：1979-06-15

申请人： Louis O. Torregrossa ,  Jozef M. Bentvelzen ,  Gerald D. Crosby ,  Michael D. Meredith ,  Henry Bepple

发明人： Louis O. Torregrossa ,  Jozef M. Bentvelzen ,  Gerald D. Crosby ,  Michael D. Meredith ,  Henry Bepple

IPC分类号： D21C9/10 ,  D21C9/12 ,  D21C9/14 ,  D21C9/16 ,  D21D5/28

CPC分类号： D21C9/1068

摘要： A wood pulp slurry is treated with oxygen in a mill with little change to the process or structure of the mill. No special pressure tanks are required. The consistency of the pulp need not be altered for the treatment step. It may be treated at the usual process consistency of the pulp; e.g., it may be treated at the usual consistency of the pulp leaving a washer or subsequent steam mixer without additional dewatering or additional dilution.The oxygen is added into a closed section of the system so that it cannot immediately vent to the atmosphere. Alkali should also be present when the oxygen is mixed with the slurry. The mixing should occur near to the point of oxygen addition.The mixing occurs in a relatively small mixer that intensively mixes the slurry and gas. The mixer has a mixing zone with a swept area of 10,000 to 1,000,000 square meters per metric ton of oven-dry pulp. A preferred range is 25,000 to 150,000 square meters per metric ton of oven-dry pulp and an optimum range of around 65,400 square meters per metric ton of oven-dry pulp.The pulp is treated several times during a sequence. Some sequences are O-X-O and O-O-X-O in which X may be chlorine, chlorine dioxide, a combination of chlorine and chlorine dioxide - mixture of chlorine and chlorine dioxide, C.sub.D, D.sub.c -, hypochlorite, peroxide and ozone. The sequence may be followed by a D stage.Other systems and specific mixer designs are also disclosed.

摘要翻译： 在磨机中用氧气处理木浆浆料，对轧机的工艺或结构几乎没有变化。 不需要特殊的压力罐。 对于处理步骤，不需要改变纸浆的稠度。 可以按照纸浆的通常工艺一致性进行处理; 例如，可以以离开洗涤器或随后的蒸汽混合器的纸浆的通常稠度进行处理，而无需额外的脱水或额外的稀释。 将氧气加入系统的封闭部分，使其不能立即排放到大气中。 当氧气与浆料混合时，碱也应存在。 混合应发生在加氧附近。 混合发生在相当小的混合器中，其密集地混合浆料和气体。 混合器具有混合区，扫地面积为10,000至100万平方米，每公吨烘干纸浆。 每公吨烘干纸浆的优选范围是25,000至15万平方米，每公吨干燥纸浆的最佳范围约为65,400平方米。 在一个序列中纸浆被处理好几次。 一些序列是O-X-O和O-O-X-O，其中X可以是氯，二氧化氯，氯和二氧化氯的组合 - 氯和二氧化氯的混合物，CD，Dc-，次氯酸盐，过氧化物和臭氧。 该序列之后可以是D阶段。 还公开了其他系统和特定混合器设计。

公开(公告)号：US4298427A

公开(公告)日：1981-11-03

申请号：US48947

申请日：1979-06-15

申请人： Jozef M. Bentvelzen ,  Michael D. Meredith ,  Louis O. Torregrossa ,  Henry Bepple

发明人： Jozef M. Bentvelzen ,  Michael D. Meredith ,  Louis O. Torregrossa ,  Henry Bepple

IPC分类号： D21C9/10

CPC分类号： D21C9/1068

摘要： A wood pulp slurry is treated with oxygen in a mill with little change to the process or structure of the mill. No special pressure tanks are rquired. The consistency of the pulp need not be altered for the treatment step. It may be treated at the usual process consistency of the pulp; e.g., it may be treated at the usual consistency of the pulp leaving a washer or subsequent steam mixer without additional dewatering or additional dilution.The oxygen is added into a closed section of the system so that it cannot immediately vent to the atmosphere. Alkali should also be present when the oxygen is mixed with the slurry. The mixing should occur near to the point of oxygen addition.An existing extraction stage within the system may be used as a source of alkali. In an existing extraction stage, the mixer and upstream oxygen line would be placed in the line between the steam mixer and the extraction tower.The mixing occurs in a relatively small mixer that intensively mixes the slurry and the gas. The mixer has a mixing zone with a swept area of 10,000 to 1,000,000 square meters per metric ton of oven-dry pulp. A preferred range is 25,000 to 150,000 square meters per metric ton of oven-dry pulp and an optimum range of around 65,400 square meters per metric ton of oven-dry pulp.Other systems and specific mixer designs are also disclosed.

摘要翻译： 在磨机中用氧气处理木浆浆料，对轧机的工艺或结构几乎没有变化。 没有特殊的压力罐被打。 对于处理步骤，不需要改变纸浆的稠度。 可以按照纸浆的通常工艺一致性进行处理; 例如，可以以离开洗涤器或随后的蒸汽混合器的纸浆的通常稠度进行处理，而无需额外的脱水或额外的稀释。 将氧气加入系统的封闭部分，使其不能立即排放到大气中。 当氧气与浆料混合时，碱也应存在。 混合应发生在加氧附近。 系统内的现有萃取阶段可用作碱源。 在现有的萃取阶段，混合器和上游氧气管线将被置于蒸汽混合器和萃取塔之间的管线中。 混合发生在相当小的混合器中，其密集地混合浆料和气体。 混合器具有混合区，扫地面积为10,000至100万平方米，每公吨烘干纸浆。 每公吨烘干纸浆的优选范围是25,000至15万平方米，每公吨干燥纸浆的最佳范围约为65,400平方米。 还公开了其他系统和特定混合器设计。

公开(公告)号：US4295926A

公开(公告)日：1981-10-20

申请号：US49001

申请日：1979-06-15

申请人： Jozef M. Bentvelzen ,  Michael D. Meredith ,  Henry Bepple ,  Louis O. Torregrossa ,  Howard R. Battan ,  Dennis H. Justice

发明人： Jozef M. Bentvelzen ,  Michael D. Meredith ,  Henry Bepple ,  Louis O. Torregrossa ,  Howard R. Battan ,  Dennis H. Justice

IPC分类号： D21B1/16 ,  D21B1/34 ,  D21C9/00 ,  D21C9/10 ,  D21D1/30 ,  D21D5/28

CPC分类号： D21C9/004 ,  D21B1/16 ,  D21B1/342 ,  D21C9/1068 ,  D21D1/30

摘要： A wood pulp slurry is treated with oxygen in a mill with little change to the process or structure of the mill. No special pressure tanks are required. The consistency of the pulp need not be altered for the treatment step. It may be treated at the usual process consistency of the pulp; e.g., it may be treated at the usual consistency of the pulp leaving a washer or the subsequent steam mixer without additional dewatering or additional dilution.The oxygen is added into a closed section of the system so that it cannot immediately vent to the atmosphere. Alkali should also be present when the oxygen is mixed with the slurry. The mixing should occur near to the point of oxygen addition.The oxygen is inserted into the pulp slurry and mixed with the pulp slurry between a pair of washers. The second washer may be a vacuum, pressure or diffusion washer.The mixing occurs in a relatively small mixer that intensively mixes the slurry and gas. The mixer has a mixing zone with a swept area of 10,000 to 1,000,000 square meters per metric ton of oven-dry pulp. A preferred range is 25,000 to 150,000 square meters per metric ton of oven-dry pulp and an optimum range of around 65,000 square meters per metric ton of oven-dry pulp.Other systems and specific mixer designs are also disclosed.

摘要翻译： 在磨机中用氧气处理木浆浆料，对轧机的工艺或结构几乎没有变化。 不需要特殊的压力罐。 对于处理步骤，不需要改变纸浆的稠度。 可以按照纸浆的通常工艺一致性进行处理; 例如，可以以离开洗涤器或随后的蒸汽混合器的纸浆的通常稠度进行处理，而无需额外的脱水或额外的稀释。 将氧气加入系统的封闭部分，使其不能立即排放到大气中。 当氧气与浆料混合时，碱也应存在。 混合应发生在加氧附近。 将氧气插入纸浆中并与纸浆在一对垫圈之间混合。 第二垫圈可以是真空，压力或扩散垫圈。 混合发生在相当小的混合器中，其密集地混合浆料和气体。 混合器具有混合区，扫地面积为10,000至100万平方米，每公吨烘干纸浆。 每公吨烘干纸浆的优选范围为25,000至15万平方米，每公吨烘干纸浆的最佳范围约为65,000平方米。 还公开了其他系统和特定混合器设计。

公开(公告)号：US4303470A

公开(公告)日：1981-12-01

申请号：US48939

申请日：1979-06-15

申请人： Michael D. Meredith ,  Jozef M. Bentvelzen ,  Henry Bepple

发明人： Michael D. Meredith ,  Jozef M. Bentvelzen ,  Henry Bepple

IPC分类号： B01F3/04 ,  B01F7/00 ,  B01F7/02 ,  D21B1/34 ,  D21C9/00 ,  D21C9/10 ,  D21D5/28

CPC分类号： B01F3/04836 ,  B01F3/04588 ,  B01F7/022 ,  D21B1/342 ,  D21C9/001 ,  D21C9/10 ,  D21C9/1068 ,  B01F7/0025 ,  B01F7/00258 ,  B01F7/007 ,  B01F7/02

摘要： Process and apparatus for mixing a wood pulp slurry with a chemical at the consistency at which the slurry exits a washer or the subsequent steam mixer, 7 to 15%. The chemicals would include noncondensable or unsaturated gases such as oxygen, ozone, air, chlorine, chlorine dioxide, sulfur dioxide, ammonia, nitrogen, carbon dioxide, hydrogen chloride, nitric oxide or nitrogen peroxide. Highly superheated steam can also be mixed with the pulp.In the process, the pulp slurry would pass through a mixing zone having a swept area in the range of 10,000 to 1,000,000 square meters per metric ton of oven-dry pulp. The preferred range is 25,000 to 150,000 square meters per metric ton of oven-dry pulp and the optimum is considered to be around 65,400 square meters per metric ton of oven-dry pulp.The pulp slurry passes through an annular mixing zone. Specific designs of the various elements of the mixer are disclosed.

摘要翻译： 用于将木浆浆料与化学品混合在一起的方法和设备，其中浆料离开洗涤器或随后的蒸汽混合器的浓度为7至15％。 化学品将包括不可冷凝或不饱和气体如氧气，臭氧，空气，氯气，二氧化氯，二氧化硫，氨，氮气，二氧化碳，氯化氢，一氧化氮或过氧化氢。 高度过热的蒸汽也可以与纸浆混合。 在此过程中，纸浆将通过每公吨烘干纸浆的扫地面积在10,000至1,000,000平方米范围内的混合区域。 优选的范围是每公吨烘干纸浆25,000至15万平方米，最佳值被认为是每公吨干燥纸浆约65,400平方米。 纸浆通过环形混合区。 公开了混合器的各种元件的具体设计。

公开(公告)号：US4338158A

公开(公告)日：1982-07-06

申请号：US274591

申请日：1981-06-17

申请人： Jozef M. Bentvelzen

发明人： Jozef M. Bentvelzen

IPC分类号： D21C3/22 ,  D21C9/10 ,  D21C3/00

CPC分类号： D21C3/22 ,  D21C9/1036

摘要： In a two-stage cellulosic pulping and bleaching system having first-stage pulping using standard pulping chemicals and second-stage bleaching using an alkaline oxygen system, the addition of a protector occurs only in the first stage pulping instead of between the first and second stages or in the second stage bleach. A magnesium compound is normally used as the protector.

摘要翻译： 在具有使用标准制浆化学品的第一级制浆和使用碱性氧系统的第二级漂白的两阶段纤维素制浆和漂白系统中，仅在第一阶段制浆而不是在第一和第二阶段之间进行保护剂的添加 或在第二阶段漂白。 通常使用镁化合物作为保护剂。