| 徐秀清,刘进文,来维亚.柴油加氢装置关键换热器管束腐蚀机理研究[J].装备环境工程,2017,14(9):63-67. XU Xiu-qing,LIU Jin-wen,LAI Wei-ya.Corrosion Mechanism of Key Heat Exchanger Tubes for Diesel Hydrogenation Unit[J].Equipment Environmental Engineering,2017,14(9):63-67. |
| 柴油加氢装置关键换热器管束腐蚀机理研究 |
| Corrosion Mechanism of Key Heat Exchanger Tubes for Diesel Hydrogenation Unit |
| 投稿时间：2017-05-02 修订日期：2017-09-15 |
| DOI：10.7643/ issn.1672-9242.2017.09.013 |
| 中文关键词: 柴油加氢 换热器管束 15CrMo钢 321不锈钢 腐蚀机理 |
| 英文关键词:diesel hydrogenation unit heat exchanger tube 15CrMo steel 321 stainless steel corrosion mechanism |
| 基金项目:国家青年科学基金（21506256）；中石油科学研究与技术开发项目（2017D-2307） |
|
|
|
|
| 摘要点击次数: |
| 全文下载次数: |
| 中文摘要: |
| 目的 明确兰州石化柴油加氢装置某换热器管束（主要材质为15CrMo钢和321不锈钢）的腐蚀失效原因。方法 采用高温高压釜试验和模拟铵盐结晶试验研究15CrMo钢和321不锈钢在服役介质中的腐蚀机理。结果 15CrMo钢的腐蚀失效形式表现为铵盐结晶下的快速均匀腐蚀和其他部位的点蚀；而321不锈钢的腐蚀失效形式则相反，主要表现为铵盐结晶下的点蚀。结论 为避免铵盐结晶引起的腐蚀穿孔，建议提高换热器出口温度到230 ℃以上，将换热器出口的注水工艺改为注中和缓蚀剂，在加氢反应器出口增设脱氯罐。 |
| 英文摘要: |
| Object To make clear the cause of corrosion failure of refinery heat exchanger tubes (15CrMo steel and 321 stainless steel) for diesel hydrogenation unit of Lanzhou Petrochemical Company. Methods High-temperature autoclave was used to test and simulate the corrosion mechanism of 15CrMo and 321 stainless steel in corrosion medium. Results The failure form of 15CrMo steel exhibited quick uniform corrosion under ammonium salt scale and pitting corrosion for others. On the contrary, the main failure form of 321 stainless steel showed pitting under ammonium salt scale. Conclusion To avoid corrosion perforation caused by ammonium salt crystallization, it is suggested to improve the outlet temperature of the heat exchanger to 230 ℃ above, change the water injection technology for the outlet of the heat exchanger to note neutralization corrosion inhibitor, and supply a dechlorination can at the outlet of the hydrogenation reactor. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |
