多组分混合物蒸馏分离的特点

A. Frolkova, A. V. Frolkova, V. Raeva, V. Zhuchkov
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引用次数: 1

摘要

目标。通过对多组分水、有机混合物的相图结构(包括存在额外选择性物质时的相图结构)的全面研究,改进开发高效能蒸馏分离流程的过程。相图的热力学拓扑分析;在AspenTech软件包中使用局部组成方程建模相平衡:Non-Random Two Liquid和Wilson;计算实验确定不同性质的模型和实际混合物分离流程的柱参数。揭示了采用尖锐精馏、预分裂、萃取精馏、单分离剂和二元分离剂对原多组分混合物进行分馏的条件。确定了色谱柱的操作参数和各分离流程的能耗,以保证以最小的能耗达到要求的产品质量。在此基础上,提出了合成高效节能多组分混合物分离流程的新方法。制定了构成多组分混合物分离流程图开发的方法学基础的规定,并用新程序补充了标准流程图合成计划。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Features of distillation separation of multicomponent mixtures
Objectives. To improve the process of developing energy-efficient flowsheets for the distillation separation of multicomponent aqueous and organic mixtures based on a comprehensive study of the phase diagram structures, including those in the presence of additional selective substances.Methods. Thermodynamic-topological analysis of phase diagrams; modeling of phase equilibria in the AspenTech software package using the equations of local compositions: Non-Random Two Liquid and Wilson; computational experiment to determine the column parameters for separation flowsheets of model and real mixtures of various nature.Results. The fractionation conditions of the origin multicomponent mixture due to the use of sharp distillation, pre-splitting process, extractive distillation with individual and binary separating agents were revealed. The columns operation parameters and the energy consumption of the separation flowsheets ensuring the achievement of the required product quality with minimal energy consumption were determined.Conclusions. Using the original methods developed by the authors earlier and based on the generalization of the results obtained, new approaches to the synthesis of energy-efficient multicomponent mixtures separation flowsheets were proposed. The provisions that form the methodological basis for the development of flowsheets for the separation of multicomponent mixtures and supplement the standard flowsheet synthesis plan with new procedures were formulated.
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