Zhao J, Wen P T, Fu G, et al. Research on the barrier model for controlling accident hazards in hazardous chemical enterprises [J]. Journal of Henan Polytechnic University (Natural Science), doi: 10.16186/j.cnki.1673-9787.2024110018.

doi: 10.16186/j.cnki.1673-9787.2024110018.

Received：2024-11-08

Revised：2025-09-26

Online：2025-12-03

Research on the barrier model for controlling accident hazards in hazardous chemical enterprises (Online)

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

(1.Emergency Management Science Research Institute of Xinjiang Uygur Autonomous Region, Xinjiang Urumqi 830000, China; 2.School of Emergeney Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China; 3.Qingdao Kang'anbao Chemical Safety Consulting limited company, Shandong Qingdao 266000, China; 4.China Academy of Safety Science and Technology, Beijing 100012, China)

Abstract: Objectives The known risk analysis methods have phenomena that are difficult to understand. A model for hazard control barriers that is easy to understand is proposed. The main goal of this model is different from most that conclude through quantitative risk analysis methods; instead, it focuses on risk communication at each operational stage to enhance risk awareness. Methods This article based on Hazard and Operability Analysis (HAZOP), using the Layer of Protection Analysis (LOPA) semi-quantitative method, further assess the effectiveness of the protective layers, simulate the release of hazards using PHAST software and adjust the correction factors for this scenario, propose safety performance standards using the "24 Model" theory definition, to determine the relevant safety barriers. Ultimately, establish a hazard control barrier model for chemical enterprises using the improved Bow-tie method. Results After three years of applied research in a major chlor-alkali chemical industry enterprise, significant results were achieved, forming a visual risk profile, make it easier for employees to understand, enhancing risk communication and awareness, and clearly define the responsible positions, criticality, and national standards and regulations requirements for each type of key safety barrier in the barrier model for controlling  accident hazard. Conclusions The research results can provide relevant basis for eliminating accident risks for hazardous chemical enterprises, offering very important references and insights for the pre-control of major safety accidents in hazardous chemical enterprises in Xinjiang.

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

CLC: X937