详细信息
精对苯二甲酸装置溶剂脱水塔中对二甲苯累积量对分离效果的影响 ( EI收录)
Influence of p-Xylene Accumulation on the Operation of Pure Terephthalic Acid Solvent Dehydratic Distillation
文献类型:期刊文献
中文题名:精对苯二甲酸装置溶剂脱水塔中对二甲苯累积量对分离效果的影响
英文题名:Influence of p-Xylene Accumulation on the Operation of Pure Terephthalic Acid Solvent Dehydratic Distillation
作者:李绍军[1];曾根保[2];钱锋[1]
机构:[1]华东理工大学化学工程联合国家重点实验室;[2]华东理工大学自动化研究所,上海200237
年份:2008
卷号:34
期号:1
起止页码:24
中文期刊名:华东理工大学学报(自然科学版)
外文期刊名:Journal of East China University of Science and Technology
收录:CSTPCD;;EI(收录号:20081311171206);Scopus;北大核心:【北大核心2004】;CSCD:【CSCD2011_2012】;
基金:国家杰出青年基金(60625302);上海市自然科学基金(06ZR14027)
语种:中文
中文关键词:精对苯二甲酸;共沸精馏;模拟;优化;对二甲苯
外文关键词:pure terephthalic acid; azeotrophic distillation~ simulation; optimization; p-xylene
摘要:用ASPEN PLUS流程模拟软件模拟计算了精对苯二甲酸(Pure Terephthalic Acid,PTA)装置中溶剂脱水共沸精馏塔内醋酸与水的分离过程,在此基础上研究回流中不同质量分数的对二甲苯(PX)在塔内的分布及其对塔釜加热负荷的影响。结合剩余曲线分析对二甲苯、水和醋酸正丁酯三元系统的分离特性。研究结果表明:在PTA生产中采用醋酸正丁酯为共沸剂进行醋酸和水的分离时,应该在对二甲苯质量分数积累到0.15时,在回流罐分相器上增加旁路来排放部分溶剂以降低系统内PX的质量分数。
A model for solvent dehydratic distillation in pure terephthalic acid process is established and embed in Aspen Plus and the influence of p-xylene mass fraction in reflux on the operation of solvent dehydratic distillation is simulated. By analyzing the residue curves of three key components, it is suggested that when n-butyl acetate is employed as the entrainer, a bypass should be used to control the mass fraction of p-xylene below 0. 15 by draining some solvent from the reflux drum.
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