ZHAO J, WEN P T, FU G,et al.Research on a barrier model for controlling accident hazards in hazardous chemical enterprises[J].Journal of Henan Polytechnic University(Natural Science) ,2026,45(3):123-132.

doi:10.16186/j.cnki.1673-9787.2024110018

Received:2024/11/08

Revised:2025/09/26

Published:2026/04/28

Research on a barrier model for controlling accident hazards in hazardous chemical enterprises

Zhao Jun1, Wen Pengtao1, Fu Gui2, Liang Hanxiao1, Li Qi3, Guan Lei4, Wang Han4, Zhang Kai4

1.Emergency Management Science Research Institute of Xinjiang Uyghur Autonomous Region， Urumqi 830000， Xinjiang Weiwuer Zizhiqu， China；2.School of Emergency Management and Safety Engineering， China University of Mining and Technology-Beijing， Beijing  100083， China；3.Qingdao Kang’anbao Chemical Safety Consulting Co.， Ltd.， Qingdao  266000， Shandong， China；4.China Academy of Safety Science and Technology， Beijing  100012， China

Abstract: Objectives To strengthen safety supervision and prevent accidents in hazardous chemical enterprises is a critical and urgent issue in safety management. Due to the difficulty in understanding existing risk analysis methods， a hazard control barrier model that is easy to interpret is proposed.  Methods Based on hazard and operability study （HAZOP）， the layer of protection analysis （LOPA） semi-quantitative method was applied to further evaluate the effectiveness of protective layers. The PHAST software was used to simulate hazardous material leakage， and correction factors for the scenario were adjusted. The “24 Model” theory was used to establish safety performance standards and identify relevant safety barriers. Finally， an improved Bow-tie method was used to establish a hazard control barrier model for hazardous chemical enterprises.  Results After three years of application in a large chlor-alkali chemical enterprise， the model demonstrated good performance. It generated clear and intuitive visual risk representations， improved risk communication and awareness， and clearly defined the responsible roles， criticality levels， and relevant national standards for each key safety barrier.  Conclusions The results provide a basis for eliminating accident hazards in hazardous chemical enterprises and offer references for accident prevention and control in the chemical industry.

Key words:hazardous chemical;HAZOP;LOPA;safety barrier;accident prevention;chemical safety