Proportional-Integral Control and Model Predictive Control of Extractive Dividing-Wall Column Based on Temperature Differences
Proportional-Integral Control and Model Predictive Control of Extractive Dividing-Wall Column Based on Temperature Differences
复制标题
基于温差的萃取间壁塔比例积分控制与模型预测控制
DOI：
10.1021/acs.iecr.8b02729
复制
发表时间：
2018
影响因子：
4.2
通讯作者：
Dong Lichun
中科院分区：
文献类型：
--
作者：
Feng Zemin;Shen Weifeng;Rangaiah G P;Dong Lichun
萃取间壁塔（EDWC）被证明是一种有前途的分离多种共沸物或接近沸点混合物的节能技术；然而，由于其结构强化、物理空间较小、相互作用强，其可控性非常具有挑战性。大多数关于 EDWC 控制的研究侧重于使用比例积分 (PI) 控制来评估温度或成分控制的性能；然而，在不同扰动下，EDWC的两种产物纯度的控制存在显着的稳态偏移和超调。本文首先对 EDWC PI 控制的单温控 (TC)、温差控制 (TDC) 和双温控 (DTDC) 方案的性能进行了研究，以二甲亚砜为夹带剂分离甲苯和 2-甲氧基乙醇。结果表明，TDC方案产物纯度的稳态偏差远小于TC和DTDC方案。亚...
Extractive dividing-wall column (EDWC) was proved to be a promising energy-saving technique for the separation of multiple azeotropes or close-boiling mixtures; however, its controllability is very challenging due to its intensified structure with smaller physical space and strong interactions. Most studies on the EDWC control focused on evaluating the performance of temperature or composition control using proportional-integral (PI) control; nevertheless, significant steady-state offsets and overshoots are present in the control of two product purities of EDWC under different disturbances. In this paper, the performance of single temperature control (TC), temperature difference control (TDC) and double temperature control (DTDC) schemes for PI control of EDWC was first examined for the separation of toluene and 2-methoxyethanol using dimethyl sulfoxide as the entrainer. The results show that the steady-state offsets in product purities of TDC scheme are much smaller than those of TC and DTDC schemes. Sub...