FF-26及FF-66精制剂在加氢裂化装置中应用比较

Application comparation of FF-26 and FF-66 refiners in hydrocracking unit

中国石油化工股份有限公司金陵分公司加氢裂化装置采用单段串联部分循环加氢工艺,以直馏蜡油为原料,最大量生产优质中间馏分油。装置上一周期采用FF-26精制剂,级配FC-16B/FC-14组合裂化剂,装置运行31个月后,裂化剂再生。2017年6月,首次应用FF-66精制剂,并级配再生后的裂化剂。通过对装置两周期标定数据的分析,发现本周期R1001精制油、汽提塔底油、石脑油和尾油硫含量均高于上周期,而氮含量低于上周期,说明FF-66加氢脱硫活性稍低于FF-26,加氢脱氮能力比FF-26稍强;本周期干气收率与上周期相同,液体收率稍低于上周期,主要原因是本周期原料较轻,为了提高产品液体收率,降低反应裂解深度,从而导致轻、重石脑油和喷气燃料收率均低于上周期;柴油和尾油收率高于上周期,说明轻油在低裂解温度下,再生剂的中间馏分油选择性严重偏离催化剂最初设计;变压器油倾点和凝点高于上周期,说明再生剂的异构化性能严重降低。

The hydrocracking unit of SINOPEC Jinling Petrochemical Company adopts single-stage series partial recycling hydrogenation process, which use straight-run wax oil as feedstock, and high quality intermediate distillate oil can be produced to maximum quantity. The unit use refining catalyst FF-26, and apply grading FC-16 B/FC-14 combination catalyst in the last production cycle. After running 31 months, the cracking catalysts are reactivated. In June 2017, the unit first use FF-66 refining catalysts, and grade regenerated cracking catalysts. The analysis of the two-cycle calibration data of the unit find that the sulfur content of R1001 refined oil, bottom oil of stripper, naphtha and tail oil are higher than that of last cycle. however, the nitrogen content is lower than last cycle’s, which indicates the hydrodesulfurization activity of FF-66 is lower than that of FF-26, but the hydrodenitrification activity is slightly stronger than FF-26. The dry gas yield in this cycle is same as that in last cycle, and the liquid yield is slightly lower than that in last cycle. The primary reason is the feedstock are lighter this cycle. In order to improve liquid yield and reduce cracking depth, the yield of light and heavy naphtha and jet fuel are lower than last cycle’s. The yield of diesel and tail oil is higher than that of last cycle, which indicates that the selectivity of intermediate distillate oil of regenerant deviates seriously from the original design of catalyst at low cracking temperature. The pour point and condensation point of transformer oil are higher than that of last cycle, which indicates that the isomerization performance of regenerant is seriously reduced.