油品储罐硫铁化物自燃性的影响因素研究

RESEARCH ON THE FACTORS IMPACTING PYROPHORICITY OF IRON SULPHIDES IN OIL TANK

含硫原油储罐中的H_2S与内壁铁的主要腐蚀产物Fe_2O_3,Fe_3O_4反应生成不同形式的硫铁化物,硫铁化物的氧化放热是引起含硫油品储罐着火的主要原因。研究了在75℃条件下,水分的存在对硫铁化物的生成以及不同硫化时间对硫铁化物自燃性的影响,通过绘制Fe_2O_3,Fe_3O_4硫化产物氧化反应温度-时间曲线,研究不同条件对硫铁化物的氧化放热自燃的影响。结果表明,在较高温度条件下,水分的存在有利于生成氧化活性更强的硫铁化物,对硫铁化物自燃起到了促进作用;同时硫化时间也是影响其自燃的重要因素。

Iron sulphides are generated sion product in oil storage tanks react with h when iron oxide red and iron oxide black as a predominant corroydrogen sulphide. Thermal oxidation of the iron sulphides is regarded as the main cause of tank fire. The influence of water on forming of iron sulphides and impact of sulfuration time on pyrophoricity of iron sulphides are analytically examined. The temperature-time curves are obtained on sulfurization and oxidation reaction of iron oxide red and iron oxide black. The research results indicate that the presence of water at higher temperature condition is propitious to the formation of high-activity iron sulphides and accelerates pyprophoricity of tank. Sulfuration time has a great impact on the pyrophoricity of iron sulphides.