含硫油品储罐自燃性的研究

AN INVESTIGATION OF THE SPONTANEOUS BURNING OF OIL TANK STORING SULFUR CONTAINING OIL PRODUCTS

含硫油品储罐内壁铁的腐蚀产物Fe2O3,Fe(OH)3,Fe3O4与湿H2S气体在没有O2存在的室温条件下发生化学反应生成硫铁化物,硫铁化物氧化放热是引起含硫油品储罐着火的主要原因。采用X射线衍射仪对不同环境温度下Fe2O3,Fe(OH)3,Fe3O4硫化反应生成的硫铁化物进行分析,通过绘制硫化产物氧化升温曲线,研究不同条件对储罐自燃的影响,并且对Fe2O3,Fe(OH)3,Fe3O4常温硫化产物结构进行了扫描电镜分析。结果表明,不同环境温度下生成的硫化产物的类型不同。随着硫化过程中环境温度的升高,硫铁化物的自燃性增强。不同铁氧化物生成的硫化产物的表面结构不同,可能是造成其硫化产物自燃性差异的主要原因。

Fe2O3 ,Fe（OH）3 and Fe3O4 formed by the corrosion of the inner wall of oil tank were further reacted with wet hydrogen sulphide at room temperature without the presence of oxygen to form iron sulphides, and the heat release from the oxidation of iron sulphides was the main cause of the spontaneous burning of oil tank storing sufur containing oil products. Iron sulphides formed under various environmental temperatures were analyzed by X-ray diffraction and scanning electron microscope. The effect of conditions on the spontaneous burning of oil tank was investigated by the temperature rise curves of the oxidation of iron sulphides. Results showed that the types of iron sulphides formed under various temperatures were varied. The pyrophoric oxidation tendency of iron sulphides increased with the increase of environmental temperature during sulfurization, and the differences in surface structure of various iron sulphides might be the main cause of the various pyrophoric reaction tendencies.