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continuous cooking with kallimpregnering and control of dissolved organic matter (dom)
continuous cooking with kallimpregnering and control of dissolved organic matter (dom)
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机译:连续蒸煮和溶解有机物控制(dom)
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摘要
A method of treating wood chips allows chemical pulp (e. g. kraft pulp) to be produced having enhanced fiber strength properties. In a first zone or stage the chips are cool impregnated (e. g. a temperature of about 60-120 DEG C.) with a first alkali-containing liquid (25-35 g/l expressed as NaOH). In the top of a continuous digester in a second zone or stage the chips are then treated with a second alkali-containing liquid having an alkali concentration at least 5 g/l less than the first liquid (e. g. 10-20 g/l) and a temperature of between about 120-160 DEG C. (e. g. 130-150 DEG C.). An extraction typically takes place to effect the change in treatment zones. After the second zone the chips are cooked at about 140-180 DEG C. (e. g. 150-170 DEG C.), and higher than in the second zone.
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机译:一种处理木屑的方法允许生产具有增强的纤维强度性能的化学纸浆(例如牛皮纸浆)。在第一区或第一阶段,用第一含碱液体(25-35g / l,表示为NaOH)将木屑冷却浸渍(例如,温度约60-120℃)。然后在第二区域或阶段的连续蒸煮器的顶部,用第二种含碱液体处理碎片,第二种含碱液体的碱浓度至少比第一种液体低5 g / l(例如10-20 g / l),并且温度在约120-160℃(例如130-150℃)之间。通常进行提取以改变处理区域。在第二区之后,将木片在约140-180℃(例如150-170℃)下烹饪,并高于第二区。
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