常减压蒸馏装置塔顶系统缓蚀剂的评价方法与应用

针对常减压蒸馏装置塔顶系统,建立了一套缓蚀剂筛选与评价方法。参考相关标准,采用静态挂片失重法评价缓蚀剂的缓蚀效率;采用硫酸铜饱和溶液评价缓蚀剂的成膜性能;以乳化液的稳定程度来评价缓蚀剂的乳化倾向;以水、石脑油馏分为溶剂,考察缓蚀剂在油品和水中的溶解或分散性能;上述4项性能最优的缓蚀剂为适合的缓蚀剂。采用本方法对5种缓蚀剂进行了筛选,其中EPR81的性能最优,现场应用结果也验证了其性能优良,可见评价方法准确且有效。

EVALUATION METHOD AND APPLICATION OF CORROSION INHIBITOR IN CRUDE DISTILLATION UNIT OVERHEAD SYSTEM

A set of evaluation method for inhibitors selection used in crude distillation unit overhead system was established. Based on the other relevant standards, the methods include: (i) weight loss method (static) to evaluate the inhibition efficiency of inhibitors; (ii) evaluation of film forming performance of inhibitors with saturated sulfate copper solution; (iii) evaluation of emulsification tendency of the inhibitor based on the stability of the emulsion; (iv) dissolution or dispersion properties of inhibitors in oils and waters using water and naphtha as solvents. The inhibitor with 4 best results is the suitable inhibitor. Five inhibitors were screened by the evaluation method. EPR81 has the best performance and is proven by the field application. This indicates that the evaluation method is accurate and effective.