加氢装置高压空冷器系统管道的腐蚀

摘要

高压空冷器系统管道材料的腐蚀问题已成为加氢装置安全稳定运行的不稳定因素,主要有氢腐蚀、湿H2S损伤、铵盐结晶导致管道堵塞和垢下腐蚀等.系统地探讨了加氢裂化装置高压空冷器上下游管道腐蚀发生的原因和机理,并结合多套装置现场运行经验,以期对该系统管道的材料设计提供一些合适的建议.%The corrosion of pipeline materials in high pressure air cooler system has become an unstable factor affecting the safe and stable operation of the hydrogenation unit,including hydrogen corrosion,wet H2S damage,pipeline clogging and corrosion caused by ammonium salt crystallization. The causes and mechanism of corrosion in the upstream and downstream pipelines of high pressure air cooler in hydrocracking unit are discussed systematically. Suggestions are offered as well for the material design of the system on the basis of practices in various plants.