Influence of Design Margin on Operation Optimization and Control Performance of Chemical Processes

doi:10.1016/S1004-9541(14)60010-0

Chinese Journal of Chemical Engineering ›› 2014, Vol. 22 ›› Issue (1): 51-58.DOI: 10.1016/S1004-9541(14)60010-0

• 过程系统工程与过程安全 • 上一篇下一篇

Influence of Design Margin on Operation Optimization and Control Performance of Chemical Processes

许锋, 蒋慧蓉, 王锐, 罗雄麟

Research Institute of Automation, China University of Petroleum, Beijing 102249, China

收稿日期:2013-08-15 修回日期:2013-09-10 出版日期:2014-01-05 发布日期:2014-01-04
通讯作者: LUO Xionglin
基金资助:
Supported by the National Natural Science Foundation of China (21006127), the National Basic Research Program of China (2012CB720500), and the Science Foundation of China University of Petroleum (KYJJ2012-05-28).

Influence of Design Margin on Operation Optimization and Control Performance of Chemical Processes

XU Feng, JIANG Huirong, WANG Rui, LUO Xionglin

Research Institute of Automation, China University of Petroleum, Beijing 102249, China

Received:2013-08-15 Revised:2013-09-10 Online:2014-01-05 Published:2014-01-04
Contact: LUO Xionglin
Supported by:
Supported by the National Natural Science Foundation of China (21006127), the National Basic Research Program of China (2012CB720500), and the Science Foundation of China University of Petroleum (KYJJ2012-05-28).

摘要/Abstract

摘要： Operation optimization is an effective method to explore potential economic benefits for existing plants. The maximum potential benefit from operation optimization is determined by the distances between current operating point and process constraints, which is related to the margins of design variables. Because of various disturbances in chemical processes, some distances must be reserved for fluctuations of process variables and the optimum operating point is not on some process constraints. Thus the benefit of steady-state optimization can not be fully achieved while that of dynamic optimization can be really achieved. In this study, the steady-state optimization and dynamic optimization are used, and the potential benefit is divided into achievable benefit for profit and unachievable benefit for control. The fluid catalytic cracking unit (FCCU) is used for case study. With the analysis on how the margins of design variables influence the economic benefit and control performance, the bottlenecks of process design are found and appropriate control structure can be selected.

关键词: design margin, operation optimization, control performance, bottleneck, fluid catalytic cracking unit (FCCU)

Abstract: Operation optimization is an effective method to explore potential economic benefits for existing plants. The maximum potential benefit from operation optimization is determined by the distances between current operating point and process constraints, which is related to the margins of design variables. Because of various disturbances in chemical processes, some distances must be reserved for fluctuations of process variables and the optimum operating point is not on some process constraints. Thus the benefit of steady-state optimization can not be fully achieved while that of dynamic optimization can be really achieved. In this study, the steady-state optimization and dynamic optimization are used, and the potential benefit is divided into achievable benefit for profit and unachievable benefit for control. The fluid catalytic cracking unit (FCCU) is used for case study. With the analysis on how the margins of design variables influence the economic benefit and control performance, the bottlenecks of process design are found and appropriate control structure can be selected.

Key words: design margin, operation optimization, control performance, bottleneck, fluid catalytic cracking unit (FCCU)

许锋, 蒋慧蓉, 王锐, 罗雄麟. Influence of Design Margin on Operation Optimization and Control Performance of Chemical Processes[J]. Chinese Journal of Chemical Engineering, 2014, 22(1): 51-58.

XU Feng, JIANG Huirong, WANG Rui, LUO Xionglin. Influence of Design Margin on Operation Optimization and Control Performance of Chemical Processes[J]. Chin.J.Chem.Eng., 2014, 22(1): 51-58.

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Influence of Design Margin on Operation Optimization and Control Performance of Chemical Processes

Influence of Design Margin on Operation Optimization and Control Performance of Chemical Processes

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