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2. 发明申请

WO1983000816A1 METHOD AND APPARATUS FOR MIXING PULP WITH OXYGEN 审中-公开
标题翻译：用于混合氧气的方法和装置
公开(公告)号：WO1983000816A1
公开(公告)日：1983-03-17
申请号：PCT/US1981001187
申请日：1981-09-04
申请人： WEYERHAEUSER COMPANY
发明人： WEYERHAEUSER COMPANY , BATTAN, Howard, R. , BENTVELZEN, Joseph, M. , BEPPLE, Henry , CROSBY, Gerald, D. , FLECK, John, A. , JUSTICE, Dennis, H. , MEREDITH, Michael, D. , TORREGROSSA, Louis, O.
IPC分类号： B01F07/00
CPC分类号： D21C9/10
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 stem mixer, 7 to 15%. The chemicals would include non-condensable 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 optimum is considered to be around 65,400 square meters per metric ton of oven dry pulp. An existing extraction stage within the system may be used as a source of alkali. In an existing extraction stage, the mixer (211) and upstream oxygen line (212) would be placed in the line between the steam mixer (206') and the extraction tower (213'). The oxygen may be inserted into the pulp slurry and mixed with the pulp slurry between a pair of washers (71', 91'). The second washer (91') may be a vacuum, pressure or diffusion washer. The oxygen may be inserted into the pulp slurry and mixed with the pulp slurry between a washer (91') and the subsequent storage tank (110'). Washed wood pulp from a continuous digester (14) may be treated with oxygen in the blow line (19) from the digester (14). Most of the treatment occurs within the mixer (40). Following mixing, the pulp may be taken to a subsequent process, a diffusion washer (24), or to a storage tank (24). 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 and a hypochlorite, a peroxide or ozone. The sequence may be followed by a D stage. Other systems and specific mixer designs are also disclosed.
摘要翻译：将木浆浆料与化学品混合的方法和设备，其中浆料离开洗涤器或随后的干燥混合器的浓度为7至15％。化学品将包括不可冷凝或不饱和的气体如氧气，臭氧，空气，氯气，二氧化氯，二氧化硫，氨，氮气，二氧化碳，氯化氢，一氧化氮或过氧化氮。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描面积在10,000至1,000,000平方米范围内的混合区域。每公吨烘干纸浆的最佳值约为65,400平方米。系统内的现有萃取阶段可用作碱源。在现有的提取阶段，混合器（211）和上游氧气管线（212）将被置于蒸汽混合器（206'）和萃取塔（213'）之间的管线中。可以将氧气插入纸浆中并与一对垫圈（71'，91'）之间的纸浆混合。第二垫圈（91'）可以是真空，压力或扩散垫圈。可以将氧气插入纸浆中并与浆液在洗涤器（91'）和随后的储存罐（110'）之间混合。来自连续蒸煮器（14）的洗涤木浆可以在来自蒸煮器（14）的吹制管线（19）中用氧气处理。大多数处理发生在混合器（40）内。在混合之后，可将纸浆带入随后的过程，扩散洗涤器（24）或储存罐（24）。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以及次氯酸盐，过氧化物或臭氧。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。

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