高温缓蚀剂在常减压蒸馏装置高温部位的防腐应用

针对常减压蒸馏装置高温部位环烷酸腐蚀严重的问题，中国石化北京燕山分公司在常减压蒸馏装置的5个高温部位试用CK356N2C型高温缓蚀剂，对加注缓蚀剂前后相关侧线氢通量和油中铁含量进行检测。结果表明，常减压蒸馏装置在加注高温缓蚀剂后，各检测部位氢通量明显下降，降幅为67.34%～88.82%，减二线油和减三线油中铁质量分数分别由0.357 μg/g和0.417 μg/g降到0.073 μg/g和0.041 μg/g，说明加注高温缓蚀剂降低了腐蚀程度。

APPLICATION OF HIGH TEMPERATURE CORROSIVE INHIBITOR AT HIGH TEMPERATURE POSITIONS OF DISTILLATION UNIT

Naphthenic acid corrosion seriously affects the smooth operation of devices and even leads to major incidents. A high temperature corrosive inhibitor CK356N2C is used at five high temperature places of the distillation unit in SINOPEC Yanshan Co. to lighten corrosion. The results are evaluated by lateral line hydrogen flux detection and iron content analysis. The evaluation shows that the high temperature corrosive inhibitor plays a positive role in the inhibition of naphthenic acid corrosion at high-temperature parts: the hydrogen flux drops by 67.34%～88.82% and the iron content of the second and third vacuum side-stream is decreased to 0.357 μg/g and 0.417 μg/g, respectively, indicating the functions of the corrosion inhibitor.