Automatic HAZOP analysis method for unsteady operation in chemical based on qualitative simulation and inference

doi:10.1016/j.cjche.2015.10.004

Abstract

Abstract: Comparing with continuous production process, unsteady operation process, such as startup and shutdown, tends to abnormal situations due to a large number of operations of operators and dynamic state changes involved. To guarantee a safe operation, process hazard analysis (PHA) is very important to proactively identify the potential safety problems. In the chemical process industry, hazard and operability (HAZOP) analysis is the mostwidely used method. In this paper, based on proposed qualitative simulation and inferencemethod, an automatic HAZOP analysis method for unsteady operation processes is proposed. Mass transfer and relationships among process variables are expressed by Petri net-directed graphmodel based fuzzy logic. Operating procedure is expressed according to a formal expression. Possible operation deviations from normal operating procedure are identified by using a group of guidewords. Hazards are identified automatically by qualitative simulation and inference when wrong operation process is performed. The method is validated by a rectification column system.

Key words: Qualitative simulation, Qualitative inference, HAZOP, Maloperation, Chemical process

摘要： Comparing with continuous production process, unsteady operation process, such as startup and shutdown, tends to abnormal situations due to a large number of operations of operators and dynamic state changes involved. To guarantee a safe operation, process hazard analysis (PHA) is very important to proactively identify the potential safety problems. In the chemical process industry, hazard and operability (HAZOP) analysis is the mostwidely used method. In this paper, based on proposed qualitative simulation and inferencemethod, an automatic HAZOP analysis method for unsteady operation processes is proposed. Mass transfer and relationships among process variables are expressed by Petri net-directed graphmodel based fuzzy logic. Operating procedure is expressed according to a formal expression. Possible operation deviations from normal operating procedure are identified by using a group of guidewords. Hazards are identified automatically by qualitative simulation and inference when wrong operation process is performed. The method is validated by a rectification column system.

关键词: Qualitative simulation, Qualitative inference, HAZOP, Maloperation, Chemical process

Yuliang Zhang, Wentao Zhang, Beike Zhang . Automatic HAZOP analysis method for unsteady operation in chemical based on qualitative simulation and inference[J]. Chin.J.Chem.Eng., 2015, 23(12): 2065-2074.

Yuliang Zhang, Wentao Zhang, Beike Zhang . Automatic HAZOP analysis method for unsteady operation in chemical based on qualitative simulation and inference[J]. Chinese Journal of Chemical Engineering, 2015, 23(12): 2065-2074.

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