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加压-常压精馏分离甲醇-碳酸二甲酯的相平衡和流程模拟
Authors
张锁江
张香平
徐全清
李春山
Publication date
1 January 2003
Publisher
Abstract
变压精馏是分离共沸混合物的有效方法.本文在计算机模拟和分析的基础上,提出了加压-常压串联分离甲醇-碳酸二甲酯共沸体系的工艺方法.采用UNIQUAC方程来表征甲醇-碳酸二甲酯二元共沸体系的气液平衡.根据实验数据,回归了该热力学模型中的交互作用参数,模型的计算结果与实际数据吻合.模型的适用范围为:压力0.1~1.5MPa,温度337-440K.基于平衡级模型,对加压精馏塔进行了模拟计算,分析了各主要操作参数对分离效率、产品纯度及操作费用的影响.在对加压一常压串联流程模拟的基础上,得到了最佳分离操作工艺参数.模拟结果对工业过程的设计和改造具有一定的指导意义
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Last time updated on 05/12/2019