Corrosion & Protection of Top Recycle Heat Exchanger of Main Fractionator in a FCC Unit
摘 要
采用宏观腐蚀形貌观察、腐蚀产物及泄漏物成分分析、原料分析等方法研究了某催化装置顶循换热器腐蚀泄漏的原因。结果表明:催化装置进料氮含量较高,在顶循系统形成了氯化铵腐蚀环境,是造成顶循换热器的腐蚀的主要原因。针对腐蚀问题,提出对顶循换热器管束进行涂层防腐蚀处理的建议,实践表明,该方法有效减缓了顶循换热器的腐蚀。
Abstract
Morphology observation, composition analysis of corrosion products and leaked raw oil were used to study the corrosion reason of top recycle heat exchanger in a FCC unit. The results show that the corrosion caused by ammonium chloride was the major failure cause of the top recycle heat exchanger. In order to solve the problem, anti-corrosion suggestion of painting the tube with anti-corrosion coating was presented and proved to be effective in mitigating the corrosion of the top recycle heat exchanger.
中图分类号 TG172 DOI 10.11973/fsyfh-201707018
所属栏目 失效分析
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收稿日期 2015/12/28
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引用该论文: GUO Jinbiao,LIU Jin. Corrosion & Protection of Top Recycle Heat Exchanger of Main Fractionator in a FCC Unit[J]. Corrosion & Protection, 2017, 38(7): 566
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参考文献
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【2】范宝明. 催化分馏塔顶循换热器腐蚀及对策[J]. 石油化工腐蚀与防护,1997,14(3):23-25.
【3】陶兴,齐万松,张广建. 催化裂化分馏塔顶循换热器泄漏原因分析[J]. 石油化工腐蚀与防护,2003,20(2):30-31.
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