润滑油加氢装置运行末期的生产状况分析

针对润滑油加氢装置运行末期,由于无法掺炼加氢裂化尾油,原料性质发生较大改变,导致加氢裂化精馏塔塔底油氮含量超标、基础油倾点不合格以及加氢裂化反应器内催化剂床层出现热点等问题,采取了提高加氢裂化、异构脱蜡反应温度及采用减二线蜡油等相关措施,使加氢裂化精馏塔塔底油满足异构脱蜡单元进料氮质量分数不大于2gμ/g、异构脱蜡系统减压塔塔底基础油倾点不高于-15℃的指标要求,加氢裂化反应器热点未出现。

ANALYSIS OF PRODUCTION STATUS OF LUBE OIL HYDROGENATION UNIT AT THE END OF RUN

At the end of run of the hydrogenation unit of lubricating oil, due to the fact that the hydrocracking tail oil cannot be blended, the nitrogen content in the feed of isomerization was excessive, resulting in unqualified pour point of the base oil and hot spots in the catalyst bed of the hydrocracking reactor. The measures of increasing the temperature of hydrocracking and isodewaxing reactors and using the low nitrogen second-line oil of vacuum distillation tower were proposed. Those methods make the nitrogen content in isomerization unit feed less than 2μg/g, the pour point of base oil not higher than -15 °C，and there are no hot spots in cracking catalyst bed.