学术论文

      原油储罐低温硫腐蚀产物氧化试验研究

      Oxidation experiment of sulfurized rusts in crude oil tank

      摘要:
      为研究硫腐蚀产物的氧化过程,利用自开发的硫化氧化试验系统将从原油储罐罐顶安全阀和呼吸阀内的铁氧化物硫化以获得潮湿和干燥的硫腐蚀产物.利用能谱仪(EDS)以及扫描电子显微镜(SEM)分析硫腐蚀产物的化学组成及其微观特征.结果表明:潮湿和干燥的硫腐蚀产物中均含有单质硫、Fe2O3、Fe3S4以及FeS2,但潮湿的硫腐蚀产物中还含有FeS;两种硫腐蚀产物均具有短边、层状钻石表面以及较大核尺寸的微观特征.潮湿硫腐蚀产物的氧化过程主要包括三个阶段,分别是电化学氧化阶段、电化学与化学氧化共生阶段以及化学氧化阶段;潮湿硫腐蚀产物的氧化产物是Fe2O3.最后提出硫腐蚀产物氧化自燃时能够有效避免火灾、爆炸事故的监测预警指标.
      Abstract:
      The oxidation process of sulfurized rusts was investigated.Some iron oxides collected from inner cavity of respiratory valve equipped on the roof of a crude oil tank were put into the self-made sulfurization and oxidation experimental apparatus to gain wet and dry sulfurized rusts.Their chemical compositions and phase were analyzed by energy dispersive spectrometer (EDS) and scanning electron microscope (SEM).Results showed that both of wet and dry sulfurized rusts had S,Fe2O3,Fe3S4 and FeS2,with FeS only existed in wet sulfurized rusts.The two kinds of rusts gave a short length of side,diamond appearance and a large pore size in structure.The oxidation process of wet sulfurized rusts was investigated including electrochemical reaction stage,electrochemical & chemical reaction coexisting stage,and chemical reaction stage.The oxidation product of wet sulfurized rusts was Fe2O3.On the basis of the results,an indicator for monitoring and early-warning was proposed to prevent the accidental vessel or tank from fire and explosion.
      作者: 张勇 [1] 蒋军成 [1] 黄龙森 [2] 孟冯燚 [2] 窦站 [1] 张明广 [1] 赵声萍 [1]
      Author: ZHANG Yong [1] JIANG Juncheng [1] HUANG Longsen [2] MENG Fengyi [2] DOU Zhan [1] ZHANG Mingguang [1] ZHAO Shengping [1]
      作者单位: 南京工业大学 安全科学与工程学院,江苏省城市与工业安全重点实验室,江苏南京210009 浙江省温州市公安消防局,浙江温州,325002
      年,卷(期): 2017, 39(2)
      分类号: X937
      在线出版日期: 2017年5月16日
      基金项目: 国家自然科学基金,江苏高校优势学科建设工程,江苏省自然科学基金面上项目,江苏省普通高校研究生科研创新计划