Chemical Industry and Engineering Progress ›› 2025, Vol. 44 ›› Issue (8): 4594-4605.DOI: 10.16085/j.issn.1000-6613.2025-0672

• Reactors and process equipment modeling and simulation • Previous Articles    

Dynamic control for Agrawal divided-wall column

GAO Yan1(), LI Yongshuai1, LI Gaoyang2, PAN Hui2(), LING Hao1()   

  1. 1.State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
    2.College of Environmental and Chemical Engineering, Shanghai University of Electric Power, Shanghai 200090, China
  • Received:2025-05-10 Revised:2025-06-04 Online:2025-09-08 Published:2025-08-25
  • Contact: PAN Hui, LING Hao

Agrawal分壁精馏塔的动态控制

高岩1(), 李永帅1, 李高洋2, 潘慧2(), 凌昊1()   

  1. 1.华东理工大学化工学院,上海 200237
    2.上海电力大学环境与化学工程学院,上海 200090
  • 通讯作者: 潘慧,凌昊
  • 作者简介:高岩(2000—),男,硕士研究生,研究方向为化工精馏过程。E-mail:adolph_gao@outlook.com
  • 基金资助:
    国家自然科学基金(22478239);上海市重点实验室项目(19DZ2271100)

Abstract:

The Agrawal divided-wall column (ADWC) is a modified configuration of the divided-wall column (DWC) that offers economic benefits in terms of capital and operational costs for multi-component separation. This study aims to investigate the dynamic control structure of the ADWC for MEPB systems (methanol, ethanol, n-propanol, and n-butanol) separation. Initially, the steady-state configuration of the ADWC is optimized and analyzed. Composition control structure (CC) can handle feed disturbances of ±20%, while it may not be practical for industrial applications. Temperature control structure (TC) is more commonly used in industry but has a weaker control efficiency of ±10%. Composition-temperature control structure (CTC) is the most promising control structure due to its lower capital cost and adjustment time than CC, as well as its superior control efficiency compared to TC.

Key words: distillation, dynamic simulation, control, four-component separation, Agrawal divided-wall column, composition-temperature control

摘要:

Agrawal分壁精馏塔(Agrawal divided-wall column,ADWC)作为分隔壁精馏塔的一种改进构型,能够显著降低四组分分离的设备投资和操作投资,展现出良好的经济效益。本研究旨在针对ADWC在甲醇/乙醇/正丙醇/正丁醇(MEPB)四元醇体系分离中的动态控制问题展开研究。首先,分析ADWC的稳态构型特点。在此基础上,构建了三种控制结构,包括组成控制结构(CC)、温度控制结构(TC)以及组分-温度控制结构(CTC)。结果表明,CC结构能够有效处理±20%的进料扰动;TC结构因仅需温度检测器在工业中易于实施,但其仅能有效处理约±10%的扰动。CTC结构相较于CC结构具有更低的控制设备投资和更短的调节时间;相较TC结构具有优的控制性能和鲁棒性,是最具应用前景的控制方案。

关键词: 精馏, 动态仿真, 控制, 四组分分离, Agrawal 分壁精馏塔, 组成-温度控制

CLC Number: 

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