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化学工业与工程 2014, Vol. 31 Issue (2) :54-59    DOI: 10.13353/j.issn.1004.9533.2014.02.010
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热集成变压精馏分离乙醇-乙腈混合物
 杨兆银
(中石化上海工程有限公司,上海 200120)
Pressure Swing Distillation with Heat Integration for Ethanol-Acetonitrile Separation
YANG  Zhao-Yin
(Sinopec Shanghai Engineering Co.,Ltd., Shanghai 200120,China)

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摘要 以乙醇-乙腈混合物为对象,研究了该体系在实验压力范围内的共沸组成,分析了采用变压精馏工艺分离精制乙醇和乙腈的可行性。通过比较实验压力范围内(101~500 kPa)体系的共沸组成与Aspen Plus模拟软件中计算的体系共沸组成,选择了适合的物性方法。在实验装置上进行了变压精馏法分离精制乙醇、乙腈混合物的实验,重点考察了不同回流比对分离效果的影响,得到了质量分数大于99.5%的乙醇和乙腈产品。 应用Aspen Plus模拟软件对乙醇-乙腈体系的热集成变压精馏过程进行了模拟计算,对比了热集成变压精馏与传统变压精馏的能耗,发现热集成变压精馏节能达35%。
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杨兆银
关键词乙醇-乙腈   热集成   变压精馏   模拟   节能     
Abstract: The pressure swing distillation with heat integration was employed to separate ethanol-acetonitrile mixture. It was experimentally measured that the ethanol composition of ethanol-acetonitrile azeotrope was increased significantly with increasing pressure. A serial of experiments were implemented to obtain 99.5 % ethanol/acetonitrile products, with focus on the influence of reflux ratio on the experimental separation efficiency in each column. It was found that the optimum reflux ratio of pressurized column and atmospheric column were 3 and 4,respectively. With the help of Aspen Plus simulation, it was also showed that the pressure swing distillation with heat integration could offer 35% energy saving compared with traditional pressure swing distillation.
Keywordsethanol-acetonitrile mixture   heat integration   pressure swing distillation   simulation   energy saving     
Received 2013-06-25;
Corresponding Authors: 杨兆银,电话:(021)583666003287,E-mail:yangzhaoyin.ssec@sinopec.com。     Email: yangzhaoyin.ssec@sinopec.com
About author: 杨兆银(1964-),男,现从事石油化工工艺研究与设计方面的研究。
引用本文:   
杨兆银.热集成变压精馏分离乙醇-乙腈混合物[J].  化学工业与工程, 2014,31(2): 54-59
YANG Zhao-Yin.Pressure Swing Distillation with Heat Integration for Ethanol-Acetonitrile Separation[J].  Chemcial Industry and Engineering, 2014,31(2): 54-59
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