摘要
复合精馏序列(CDS)通过将简单精馏塔与隔壁塔整合成一个系统来分离多元混合物,不仅能够实现较低的设备投资成本与操作能耗,还能有效降低系统的工业实施难度。但是,由于隔壁塔单元固有的高度非线性特性,以及各精馏单元间因物料流连接而产生的强烈耦合效应,实现CDS的稳定操作与有效控制面临显著挑战。为解决这一问题,本文提出了3种温度推断控制方案,包括温度控制方案、温差控制方案以及双温差控制方案。闭环仿真验证表明,这3种方案均能保证CDS的平稳运行与有效控制,并且,随着控制策略从简单的温度控制逐步演进到更为复杂的双温差控制,虽然控制复杂度有所增加,但被控产品纯度的稳态偏差能够被有效降低。3种温度推断控制策略的提出有助于解决CDS的操纵与控制难题,为推动CDS的工业应用奠定基础。
The compound distillation sequence(CDS)combines simple distillation columns with dividing-wall columns into an integrated system for multi-component mixture separation.This integration not only reduces capital investment costs and operational energy consumption,but also facilitates industrial implementation.However,the inherent nonlinear characteristics of dividing-wall columns and strong coupling effects from material flow connections between distillation units pose significant challenges for stable operation and effective control of CDS.To overcome these challenges,three temperature inferential control schemes were developed,including a temperature control scheme,a temperature difference control scheme,and a double temperature difference control scheme.Closed-loop simulation demonstrated that all three schemes could ensure the stable operation and effective control of the CDS.Furthermore,as the control scheme evolved from the simpler temperature control to the more complex double temperature difference control,although the complexity of control scheme increased,the steady-state deviations in product purity were significantly reduced.The implementation of these control schemes addressed the operational and control challenges of the CDS,providing a solid foundation for their industrial application.
作者
汪国超
丁晖殿
师丽
李强
夏涛
苑杨
WANG Guochao;DING Huidian;SHI Li;LI Qiang;XIA Tao;YUAN Yang(National Engineering Research Center for Petroleum Refining Technology and Catalyst,RIPP,SINOPEC,Beijing 102299,China;College of Information Science and Technology,Beijing University of Chemical Technology,Beijing 100029,China)
出处
《化工进展》
北大核心
2025年第8期4720-4731,共12页
Chemical Industry and Engineering Progress
基金
炼油工艺与催化剂国家工程研究中心(中石化石油化工科学研究院有限公司)开放基金
新疆生产建设兵团科技计划重点领域科技攻关项目(2024AB059)。
关键词
复合精馏序列
温度推断控制
温差
过程控制
多元混合物分离
compound distillation sequence
temperature inferential control
temperature difference
process control
multi-component separation
