The Stage Difference Equation And Its Application In The Synthesis Of Distillation Columns

Due to the increasing demand in superior process quality, high production, low consumption and production safety in chemical engineering, the process synthesis plays a more and more important role in the process design, especially in the process of distillation for highly consumption.As for the research of the distillation and reactive distillation process, predecessors have given great investigation in the aspects of the design and simulation. Because of their complexity, the distillation-line, residue-curve, stage-composition line and pinch-point curve is usually needed to establish, in the research of the distillation tower design and synthesis, in which, however, tedious calculation is needed. In this paper, knowledge of the separation engineering, reaction engineering, system engineering are synthesized, and the stage difference equation (SDE) is proposed, which will provide the theory and guideline for the process system synthesis and the real-life production. The followings are focused on in this research:(1) Based on the current distillation design and synthesis method, and with the conservation of mass, the stage difference equation is deduced and the relationship among parameters of it is analyzed;(2) Through the analysis of parameters of the SDE in simple distillation column and the relationship of parameters in different column sections, the SDE is simplified further and the corresponding models are given in process of simple...