| 再生器内取热盘管失效原因分析 |
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| 引用本文： | 张礼敬,巩建鸣,涂善东,潘文越,徐平,陈世陵.再生器内取热盘管失效原因分析[J].炼油技术与工程,1999,29(1). |
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| 作者姓名： | 张礼敬 巩建鸣 涂善东 潘文越 徐平 陈世陵 |
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| 作者单位： | 南京化工大学!江苏省南京市210009(张礼敬，巩建鸣，涂善东)，金陵石油化工公司炼油厂!江苏省南京市210037(潘文越，徐平，陈世陵) |
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| 摘 要： | 应用光学显微镜和扫描电子显微镜研究分析了催化裂化装置再生器内Ｕ型取热盘管失效的原因。该管具有应力腐蚀开裂的特征，管材在受到介质腐蚀时，发生晶界损伤，进而在工作应力作用下，在这些薄弱部位产生裂纹。裂纹从管内壁开始向外扩展，裂纹面上有负二价硫离子存在。建议新装置运行中注意水处理和设备防护。
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| 关 键 词： | 流化催化裂化装置 再生器 催化剂 冷却器 管子 应力腐蚀开裂 |
FAILURE ANALYSIS OF CATALYST COOLER IN REGENERATOR |
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| Zhang Lijing,Gong Jianming,Tu Shandong.FAILURE ANALYSIS OF CATALYST COOLER IN REGENERATOR[J].Petroleum Refinery Engineering,1999,29(1). |
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| Authors: | Zhang Lijing Gong Jianming Tu Shandong |
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| Abstract: | The causes of failure of the U-type catalyst cooler in regenerator of FCCU were analyzed with optical microscope and scanning electron microscope. This U-tube is characterized by stress corrosion cracking. When the tube corroded in the medium, intergranular corrosion occurred. Under the action of working stress, further cracking took place in these weak positions. Cracks expanded from the inner tube wall to external wall, and divalent sulfur ions were found on the surface of cracks. It is suggested that in operation of the unit attentions should be paid to water treatment and equipment corrosion prevention. |
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| Keywords: | fluidized catalytic cracking unit regenerator catalyst cooler tube stress corrosion cracking |
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