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公开(公告)号：US6132556A
公开(公告)日：2000-10-17
申请号：US192210
申请日：1998-09-04
申请人： C. Bertil Stromberg , J Robert Prough , Bruno S. Marcoccia , Richard O. Laakso , Carl L. Luhrmann
发明人： C. Bertil Stromberg , 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： D21C9/02 , D21C11/0021 , D21C11/04 , D21C3/02 , D21C3/224 , D21C3/24 , D21C7/00 , D21C7/12 , D21C7/14
摘要： A method of controlling the pressure of a vertical continuous comminuted cellulosic fibrous material (wood chip) digester is provided using a pressure-control extraction in a zone relatively insensitive to changes in the flow rate of liquid introduction or removal. The method comprises controlling the pressure in the digester primarily (or substantially exclusively) by varying the flow rate of liquor extracted from the pressure-control extraction to maintain the pressure in the digester at a desired superatmospheric level while avoiding non-uniform, unstable material movement in the counter-current washing zone; and introducing dilution liquid into the digester at the at least one recirculation-dilution loop. The pressure-control extraction is preferably substantially the upper extraction in the digester. Substantially except during excessive over pressure and under pressure conditions the extraction flow from the main extraction is maintained substantially constant. Substantially only during excessive over pressure and under pressure conditions pressure control may also be practiced by controlling the rate of dilution into the at least one recirculation-dilution loop, and the extraction from the main extraction.
摘要翻译： 在对液体引入或除去流速的变化相对不敏感的区域中使用压力控制提取来提供控制垂直连续粉碎的纤维素纤维材料（木屑）蒸煮器的压力的方法。 该方法包括通过改变从压力控制提取物提取的液体的流速来控制蒸煮器中的压力（或基本上仅仅），以将蒸煮器中的压力保持在期望的超大气压水平，同时避免不均匀的不稳定的材料运动 在逆流洗涤区; 以及在所述至少一个再循环稀释循环中将稀释液引入所述消化器。 压力控制提取优选基本上是蒸煮器中的上部萃取。 基本上除了在过度过压和压力条件下，主提取物的萃取流量基本保持不变。 基本上仅在过度的过压和压力条件下，压力控制也可以通过控制稀释到至少一个再循环稀释回路中的速率以及从主提取物的萃取来实施。
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2.发明授权Method of controlling the pressure of a continuous digester using an extraction-dilution 失效使用萃取 - 稀释法控制连续蒸煮器的压力的方法
公开(公告)号：US5824188A
公开(公告)日：1998-10-20
申请号：US712977
申请日：1996-09-12
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）。
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3.发明授权Method for selectively increasing the sulfide ion concentration and sulfidity of kraft cooking liquor during kraft cooking of wood 失效在硫酸盐蒸煮木材中选择性提高硫酸盐蒸煮液硫化物离子浓度和硫化度的方法
公开(公告)号：US5575890A
公开(公告)日：1996-11-19
申请号：US291918
申请日：1994-08-18
IPC分类号： D21C3/02 , D21C3/22 , D21C3/24 , D21C7/00 , D21C7/08 , D21C7/12 , D21C7/14 , D21C9/02 , D21C11/00 , D21C11/04 , D21G7/00 , D21C3/26
CPC分类号： D21C3/02 , D21C11/0021 , D21C11/04 , D21C3/022 , D21C3/22 , D21C3/224 , D21C3/24 , D21C7/00 , D21C7/12 , D21C7/14 , D21C9/02 , D21G7/00
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）。
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公开(公告)号：US5302247A
公开(公告)日：1994-04-12
申请号：US970403
申请日：1992-11-02
CPC分类号： D21C7/14
摘要： In the production of cellulose pulp (e.g. kraft pulp) utilizing a continuous digester having a number of different feed points for cooking (e.g. white) liquor and utilizing a high pressure feeder, the volume of cool white liquor that is applied to the feed system is reduced compared to conventional processing. This can cause excessive hammering, and damage the high pressure feeder and adjacent piping and equipment. In order to avoid this, liquid being recirculated from the top of the digester back to the high pressure feeder is cooled by passing it into a heat exchanger into heat exchange relationship with a cooler liquid, with the flow of coolant automatically controlled by sensing the temperature of the recirculated liquid. The temperature in the feed system can further be lowered by cooling the cooking liquor before it is added to the pulp slurry, as by passing it to a flash tank so that its temperature is reduced at least 10.degree. C., and the flashed steam can be used in an evaporator.
摘要翻译： 在使用具有多个不同进料点的连续蒸煮器（例如白色）并利用高压进料器的纤维素纸浆（例如牛皮纸浆）的生产中，施加到进料系统的冷白液体积为 与传统加工相比有所减少。 这可能会导致过度的锤击，并损坏高压给料机和相邻的管道和设备。 为了避免这种情况，从蒸煮器顶部再循环回到高压给料器的液体通过将其通入热交换器而与较冷的液体进行热交换关系来冷却，冷却剂流通过感测温度自动控制 的再循环液体。 进料系统中的温度可以通过将蒸煮液加入到纸浆中进行冷却来进一步降低，如通过将蒸煮液送入闪蒸罐中使其温度降低至少10摄氏度，闪蒸的蒸汽可以 用于蒸发器。
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