关键词: 安全, 泵, 模拟, 过程危害分析软件工具, 风险等级评价

Abstract: Raw oil delivered by booster pumps in a residue hydrogenation unit is often under high-temperature and high-pressure, resulting in fire hazard when leaking. Hazard and Operability Analysis(HAZOP), a multi-parameter coupling quantitative risk calculation was applied to qualitatively analyze the failures of the booster pump and the failure impacts on the entire process. It was concluded that the leakage accidents could happen frequently resulting in serious consequence. This method identified the coupling relationship among the internal factors of the process node that contains the booster pump, established a Bayesian network model for the whole process, and calculated the failure probabilities of mechanical seal, packing seal and shell caused by multiple factors. According to the statistical results of local annual average wind speed and solar irradiance, common and extreme atmospheric stability and wind speed, the consequences severity of jet fire caused by leakage of high temperature raw oil under different leak diameters could be acquired by conducting process hazard analysis software tool(PHAST) simulation. Based on the probability and consequence severity calculation, risk assessment rules and risk matrix were established, and the risk levels of leakage accidents caused by different causes were evaluated. The risk levels of reason accidents can be used to risk prevention measures and proposing of emergency plans for accidents.

Key words: safety, pump, simulation, process hazard analysis software tool(PHAST), risk assessment