| 逆向蒸馏 |
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| 引用本文： | 陆恩锡,李小玲. 逆向蒸馏[J]. 化学工程, 2010, 38(4) |
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| 作者姓名： | 陆恩锡 李小玲 |
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| 作者单位： | 华南理工大学化学与化工学院,广东广州,510640 |
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| 摘 要： | 采用严格模拟法对多组分蒸馏过程进行了研究。给出了产生逆向蒸馏的3个主要原因,即进料位置不当、进料中关键组分摩尔分数过低以及实际回流比(摩尔比)接近最小回流比。分析了逆向蒸馏的弊端,如进料位置不当所引起的逆向蒸馏,使冷凝器和再沸器能耗分别增加12.76%和12.19%,总计能耗增加达24.95%。提出了避免逆向蒸馏的方法。蒸馏塔设计需分析有无逆向蒸馏现象,逆向蒸馏应予以消除,同时还需进行参数优化,包括塔板数、进料位置、回流比等。而简化法计算结果过于粗糙,只能作为参考而不能作为最终设计的依据。
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| 关 键 词： | 蒸馏夹点 恒浓区 逆向蒸馏 |
Retrograde distillation |
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| LU En-xi,LI Xiao-ling. Retrograde distillation[J]. Chemical Engineering, 2010, 38(4) |
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| Authors: | LU En-xi LI Xiao-ling |
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| Affiliation: | School of Chemistry and Chemical Engineering;South China University of Technology;Guangzhou 510640;Guangdong Province;China |
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| Abstract: | Rigorous algorithm was used to study the multi-component distillation process.Three key reasons causing retrograde distillation were given: the wrong feed plate,much lower mole fraction of key components in the feed,and the operation reflux ratio(mole ratio) approaching the minimum reflux ratio.The deficiency caused by retrograde distillation was analyzed,for example,the retrograde distillation caused by the wrong feed plate would lead to extra energy consumption: the heat duties for the condenser and the r... |
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| Keywords: | distillation pinch point constant concentration zone retrograde distillation |
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