基于改进恒热传输模型的精馏模拟初始化  

Initializing distillation column simulation based on the improved constant heat transport model

作　　者：张帆 陶少辉 陈玉石[2] 项曙光 ZHANG Fan;TAO Shaohui;CHEN Yushi;XIANG Shuguang(Institute of Process System Engineering,College of Chemical Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China;Petro-Cyber Works Information Technology Co.,Ltd.,Shanghai 200040,China)

机构地区：[1]青岛科技大学化工学院过程系统工程研究所,山东青岛266042 [2]石化盈科信息技术有限责任公司,上海200040

出　　处：《化工进展》2023年第9期4550-4558,共9页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(2217819)。

摘　　要：为提高复杂精馏塔模拟的收敛性能,改进了一种恒热传输模型,以将其拓展到复杂精馏塔中,并基于此提出了一种新的通用精馏模拟初始化方法。通过简单计算,所提出方法即可较好地估计复杂精馏塔的温度、流量以及组成沿塔板的分布。通过两个实际精馏分离过程案例,验证了所提出的初始化方法,并与经典初始化方法进行比较。结果表明,所提出初始化方法与经典初始化方法耗时相近,但所获初始分布与最终模拟结果更为接近,从而有效减少了模拟迭代次数,而对于难收敛的非理想体系精馏过程模拟,基于该方法也可以获得收敛。To improve convergence performance of distillation column simulation,a constant heat transport model was improved and extended to complex columns.A new initialization method was proposed based on the improved model,which could estimate the temperature,flow rates,and composition profiles of a complex column using simple calculations.Two separation processes were used to evaluate the proposed initialization method.The results showed that the proposed method had a similar time consumption with the existing initialization methods,while the obtained initial distribution was closer to the final simulation result than the existing ones.For a nonideal distillation process which was difficult to be converged using other initialization methods,convergence could be obtained using the proposed one.

关 键 词：精馏模拟 初始化算法 复杂精馏塔 恒热传输模型 

分 类 号：TQ028.31[化学工程]