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    • 2. 发明申请
    • A PROCESS FOR TREATING A FIBER PULP WITH A CHEMICAL SOLUTION
    • 一种用化学溶液处理纤维浆的方法
    • WO1990012146A1
    • 1990-10-18
    • PCT/FI1990000095
    • 1990-04-06
    • SALOMANS OYHACKMAN PROSESSI OY ABÖSTMAN, Håkan
    • SALOMANS OYHACKMAN PROSESSI OY AB
    • D21C09/10
    • D21C9/1031D21C9/06D21C11/0028
    • The process relates to continuous treatment of a fiber pulp with a chemical solution by forming on a filter surface a bed of a fiber material suspension and by feeding it through one or several chemical treatment steps in which the chemical solution is displaced through the bed. According to the method, there are used in each treatment step two different treatment liquids which are successively displaced through the bed. The first treatment solution is a chemical solution which contains a greater amount of active chemicals than is consumed in the reactions occurring in the pulp bed, preferably approx. twice the amount. The second treatment liquid is a solution which does not contain active chemicals in an amount significant in terms of the reaction. Its purpose is not only to displace that portion of the first treatment liquid from which the active chemicals have been spent but also that portion which still contains active chemicals upon leaving as a filtrate. Of the filtrate of the treatment step, that fraction is recovered which has the highest concentration of active chemicals and contains most of the active chemicals leaving the bed and is in its amount only so large that, when reinforced with a fresh chemical solution, it can be used in its entirety as the first treatment solution. The total liquid volume of the treatment liquids is substantially greater than the liquid volume present in the bed upon its leaving the treatment step - preferably 2- to 3-fold.
    • 该方法涉及通过在过滤器表面上形成纤维材料悬浮液床并通过将化学溶液置于床中的一个或多个化学处理步骤进料而将化学溶液连续地处理纤维纸浆。 根据该方法,在每个处理步骤中使用两个不同的处理液体,这些处理液体依次移动通过床。 第一种处理溶液是一种化学溶液,其含有比在纸浆床中发生的反应中消耗的活性化学物质更多的化学溶液, 两倍的数量。 第二处理液是不含活性化学物质的量,其反应量显着。 其目的不仅在于替代已经消耗了活性化学物质的第一种处理液体的一部分,而且在作为滤液离开时仍然含有活性化学物质的部分。 在处理步骤的滤液中,回收具有最高浓度的活性化学物质并含有离开床的大部分活性化学物质的馏分,其量仅为如此大,当用新鲜化学溶液增强时,它可以 全部用作第一种处理溶液。 处理液体的总液体体积基本上大于其离开处理步骤时床中存在的液体体积 - 优选2-3倍。
    • 4. 发明申请
    • METHOD FOR MULTISTAGE BLEACHING OF WOOD PULP
    • 木浆多元漂白方法
    • WO1994025669A1
    • 1994-11-10
    • PCT/US1994004265
    • 1994-04-19
    • INGERSOLL-RAND COMPANY
    • INGERSOLL-RAND COMPANYSHACKFORD, Lewis, Donald
    • D21C07/08
    • D21C9/1057D21C9/10D21C9/1031D21C9/153
    • A pulp bleaching line has an initial stage (140) using gaseous bleaching reagent followed by its subsequent stages (70) without intervening washing or pumping steps. The pulp is transported from the initial stage through a mixer (30) in which the pulp is heated and/or dosed with bleaching chemicals and through the subsequent stage by retained gas pressure developed in the initial stage. A portion of the retained gas may be separated and purged from the mixer through a pressure regulating device (90) to optimize pressure for processes which follow the mixer/heater. This permits elimination of a washer and pump normally provided between the initial reactor and subsequent bleaching stage.
    • 纸浆漂白生产线具有使用气体漂白剂的初始阶段(140),随后是其后续阶段(70),而不需要中间的洗涤或泵送步骤。 纸浆从初始阶段通过混合器(30)输送,其中纸浆被加热和/或配量漂白化学品,并且通过在初始阶段产生的保留气体压力通过后续阶段。 保留气体的一部分可以通过压力调节装置(90)从混合器中分离和净化,以优化压缩机,以适应跟随混合器/加热器的过程。 这允许消除通常设置在初始反应器和随后的漂白阶段之间的洗涤器和泵。