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甲醇精馏英文文献英译汉.doc

发布:2017-12-10约1.62万字共9页下载文档
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Comparison of methanol distillation tower rectification and Twin Towers 1 精馏原理 1 distillation principle 精馏是根据在相同温度下, 同一液体混合物中不同组分的挥发度不同, 经多次部分气化和多次部分冷凝最后得到较纯的组分, 实现混合物分离的操作过程。 Distillation is under the same temperature, different degree of different components in a liquid mixture of volatile, after multiple partial gasification and multiple partial condensation of the last to be compared with that of the pure components, and the operating process of separating mixtures. 轻组分和重组分,混和液 进入第一分离器, 若将第一级溶液部分气化得到气相产品冷凝液,然后再将冷凝液在第二级分离器中部分气化, 再经第二级冷凝器冷凝得溶液中的塔釜重组分必大于塔顶, 这种部分气化部分冷凝的次数( 即级数) 越多, 所得轻组分浓度越高, 最后几乎可得到纯态的易挥发组分。同理, 若将从各分离器所得溶液产品进行多次部分气化和分离, 那么这种级数愈多, 得到的溶液组分浓度越高, 最后可得到几乎纯态的难挥发组分。 Light fraction and reorganization, mixed fluid into the separator, the first, if the first stage solution partial gasification get gas phase product condensate, then condensate in the second stage separator partial gasification, and the second stage condenser and is condensed to solution of the tower kettle restructuring must be higher than the top of the tower. This part of the partial gasification condensation number (i.e. more series, the resulting light group concentration higher. Finally, almost pure state of volatile components is. Similarly, if the from the separator of the resulting solution products were repeatedly partial gasification and separation, then the series more, group to obtain the solution concentration is high, finally we can get almost pure state of difficult volatile components. 常温、常压下, 甲醇是易挥发和易燃烧的无色液体, 纯甲醇的沸点为64.5-64.8℃, 杂质的沸点有高有低,低于甲醇沸点的为轻馏分, 高于此值的为重馏分。一般情况下, 甲醇中所含轻馏分杂质主要有二甲谜、乙醛、丙酮等, 约占粗甲醇重量的1%; 重馏分主要有水、异丁醇、异丁醚等约占粗甲醇重量的4~ 5% 。甲醇合成不论采用何种催化剂, 均受其选择性的限制以及合成条件( 压力、温度和合成气组成) 的影响, 在进行甲醇合成反应的同时, 还会伴随着一系列副反应发生, 甲醇合成过程中副反应产物多达40 多种, 这些杂质只有通过精馏工序加以去除, 才能得到符合国标要求的精甲醇。 Under normal temperature and pressure, methanol is volatile and flammable, colorless liquid, the boiling point of pure methanol as 64.5-64.8 dig’s, high and low boiling point impurities, below the boiling point of
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