环烷基润滑油基础油生产工艺的中试研究和流程优化

摘要

After comparison of the combined processes of hydrotreating,hydrofinishing with one of three kinds of dewaxing processes:selective dewaxing,hydrodewaxing,and hydroisodewaxing in pilot plant,the hydrotreating-hydrodewaxing-hydrofinishing cascaded process with obvious advantages is chosen to produce naphthenic base oil from Suizhong-361 VGOs. The reaction conditions in each stage are determined by process simulation,respectively. The hydrotreating process conditions are:H2/Oil ra-tio of 885,space velocity of 0.5 h-1 ,total pressure of 16 MPa,WABT of 365-390 ℃;the hydrode-waxing process needs the conditions as follows:H2/Oil ratio of 625 ,space velocity of 3. 0h-1 ,total pressure of 15. 5 MPa and WABT of 370-380 ℃;while for the hydrofinishing,space velocity of 1. 5 h-1 and WABT of 250 ℃ are needed. Besides,the steam stripping desulfurization is replaced by high pressure hydrogen stripping. The side-draw of kerosene and light diesel and the heat transfer process are all optimized to lower the investment and operation cost.%为了从绥中36-1蜡油生产环烷基润滑油基础油，对选择性脱蜡、异构脱蜡、临氢降凝3种工艺进行中试研究和效益测算，结果表明临氢降凝工艺具有明显优势，该工艺的基本流程为：加氢处理-临氢降凝-后精制。通过流程摸拟优化临氢降凝工艺的反应条件，确定加氢处理反应条件为：氢油体积比885、体积空速0．5 h-1、总压16 MPa、床层温度365～390℃；临氢降凝条件为：氢油体积比625、体积空速3．0 h-1、总压15．5 MPa、床层温度370～380℃；后精制条件为：体积空速1．5 h-1、床层温度250℃。并改进了常规流程，将蒸汽汽提脱硫流程改为高压氢气汽提流程，简化煤油和轻柴油馏分侧线汽提流程，优化换热流程，以降低投资和运行费用。