化工进展2017，Vol.36Issue(5)：1612-1618,7.DOI:10.16085/j.issn.1000-6613.2017.05.008
考虑热力学目标的进料分流预热精馏塔分析优化
Analysis and optimization of distillation columns with feed splitting and preheating by considering a thermodynamic target
摘要
Abstract
The work systematically addresses an optimization approach of the energy-saving and hydraulic checking for distillation columns with feed splitting and preheating. To maximize the feed preheating efficiency(ratio of the reboiler duty reduction to the feed preheating duty),the key influencing parameters(e.g. amount of preheating,splitting fraction and feed locations)were adjusted by using invariant rectifying-stripping curves. Then,vapor-liquid distributing curve was employed to identify the tray with the lowest tray efficiency. Additionally,with the help of C++ programing and GUIDE tool in MATLAB,a professional hydraulic software,namely SYSU-DISTILL,with visualization window was developed. This software was used to analyze hydraulics of any tray with the lowest tray efficiency. A stabilization tower(it was assumed as ann-butane-n-hexane column)from the petroleum and chemical industry was used as an illustrative example. The thermodynamics results showed that an ideal feed preheating efficiency(100%)of this column can be reached when amount of preheating,splitting fraction and feed locations were 1000MJ/h,0.7 and 9/20,respectively. Meanwhile, the appropriate setting tray structure can achieve the goal of energy saving under guaranteeing normal operation of the distillation column from hydraulic checking. This work provided an insight into analysis and guidance in determining the optimal schemes for energy saving of actual distillation columns.关键词
热力学/固定精馏-提馏线/石油/水力学核算/优化Key words
thermodynamics/invariant rectifying-stripping/petroleum/hydraulics checking/optimization分类
化学化工引用本文复制引用
刘雪刚,何畅,张民康,何昌春,雷杨,张冰剑,陈清林..考虑热力学目标的进料分流预热精馏塔分析优化[J].化工进展,2017,36(5):1612-1618,7.基金项目
国家自然科学基金项目(21276288). （21276288）
