乙二醇解吸和再吸收过程的动态模拟与优化  

Dynamic simulation and optimization of ethylene glycol desorption and resorption process

作　　者：孙帆[1] 罗娜[1] 钟伟民[1] 钱锋[1] 

机构地区：[1]华东理工大学化工过程先进控制和优化技术教育部重点实验室,上海200237

出　　处：《计算机与应用化学》2010年第3期277-282,共6页Computers and Applied Chemistry

基　　金：国家杰出青年科学基金(60625302);国家自然科学基金(60704028);上海市基础研究重点项目(07JC14016);长江学者和创新团队发展计划资助;高等学校学科创新引智计划(B08021)

摘　　要：化工流程模拟软件不断发展,越来越多的化工装置开始采用流程模拟来优化装置的操作。本文分析乙二醇生产中解吸和再吸收过程的机理和动态特性,采用严格法计算解吸和再吸收过程,稳态和动态模拟其流程。模拟结果与实际工业过程数据相符,能够满足工业建模的要求。根据动态模拟的结果,探讨不同进料工况下的操作条件对解吸和再吸收过程的影响。在所建模型的基础上,针对进料的变化,再沸器热值的变化以及进料组分的变化,分析解吸塔的动态响应,并衡算系统的物料和能量,确认再沸器的热负荷。最后根据换热器的几何尺寸,核算塔釜再沸器换热面积,确认换热能力。本文动态模拟结果,可用于指导实际生产,仿真培训或先进控制方案的设计,也可以在操作条件进行改进时,为实际生产最佳条件的选择提供基本依据。With the extensive application of chemical analogue software, more and more chemical plants seek to optimize operation with flow analogue software. In this paper, mechanisms and dynamic characteristics of the ethylene glycol desorption and resorption process is discussed. Strictly method is used to calculate the desorption and resorption process. Static modeling and dynamic modeling of this process is built. The results of model simulation agreed with actual data fairly and the process model can satisfy the needs of process simulation. On the basis of steady - state simulation and dynamic simulation in ethylene glycol for desorption and resorption process, the optimum operational conditions are brought forward according to the changes of feed flow and composition. According to the changes of the feed rate, the calorific value and the components of the feed, dynamic responses of the desorption column are discussed. By the material calculation equations and heat balance, the heat load of reboiler is confirmed. Based on the geometry size of heat exchanger, heat exchange area is accounted and heat transfer ability is confirmed. The Results can be used in the practical production, and also can be used for simulation training and advanced control strategies design. It can also provide the basis for the choice of optimum condi- tions in actual production.

关 键 词：动态模拟 操作分析 乙二醇 解吸 吸收 

分 类 号：TQ021[化学工程]