关键词: 机械清罐油, 预处理工艺, 常减压装置, 回炼量, 净化油, 喷气燃料, 碱性氮含量

Abstract: The mechanical cleaning oil of crude oil storage tank has the characteristics of large quantity, high viscosity, high water content, stable emulsification and high mechanical impurity content. When directly entering the atmospheric and vacuum distillation unit for refining, it is very easy to cause the fluctuation of electric desalting condition and block the tower plate, which has always been a difficult problem for refining enterprises. SINOPEC Zhenhai Refining & Chemical Company has made effective exploration on the processing of tank cleaning oil and studied a new treatment scheme of tank cleaning oil. The industrial practice shows that after pretreatment of tank cleaning oil, the volume fraction of water impurities is reduced to 0.5%, with a decrease of 90%, which is significantly improves the quality of tank cleaning oil; The influence of purified oil recycling after pretreatment on atmospheric and vacuum distillation unit is greatly reduced, and the recycling capacity is guaranteed to be more than 10 m³/h, and the electric desalting water cutting and product quality meet the index requirements.

Key words: mechanical cleaning oil, pre-treatment technology, atmospheric and vacuum device, recycling capacity, purified oil, jet fuel, basic nitrogen content