苯罐检修前工艺处理作业风险分析与安全防控措施OA

To eliminate potential fire,explosion,and poisoning risks associated with the shutdown and pre-maintenance turnover of benzene storage tanks,this study investigated a pure benzene internal floating roof tank scheduled for cleaning and maintenance at a specific enterprise.Based on lessons learned from similar accidents and the physicochemical properties of pure benzene,pre-maintenance process operations were systematically an-alyzed.Consequently,primary risks were identified,including medium volatilization,static electricity accumu-lation,potential benzene leakage during pontoon dismantling due to hidden defects,incomplete steam purging,and insufficient ventilation efficiency.To mitigate these hazards,a series of prevention and control measures were proposed,encompassing the regulation of water injection flow rates,optimization of steam purging and ni-trogen replacement,implementation of dual-fan forced ventilation,and water injection protection during pontoon removal.Practical application of these protocols at the enterprise demonstrated that the concentrations of com-bustible gases and benzene vapor within the tank successfully met operational safety requirements.Therefore,the proposed strategies provide a valuable technical reference for the pre-maintenance process treatment of simi-lar benzene storage tanks.