塔釜温度对旋转带蒸馏仪馏出馏分性质的影响  

Effect of column reactor temperature on properties of distillate fractions fractionated with a spinning band distillation apparatus

作　　者：侯凯军 张艳惠 孙书红 高永福 李荻 王智峰 张海涛 

机构地区：[1]中国石油兰州化工研究中心,甘肃兰州730060

出　　处：《石化技术与应用》2015年第5期400-404,共5页Petrochemical Technology & Application

基　　金：中国石油天然气股份有限公司资助项目(项目编号:10-01A-01-01-01)

摘　　要：采用旋转带蒸馏仪对催化裂化(FCC)液相产物进行切割,考察了旋转带蒸馏仪塔釜温度对馏出馏分性质的影响。结果表明,随着塔釜温度从300℃降至270℃时,馏出馏分的收率逐渐下降;馏出馏分中汽油质量分数逐渐增大,柴油质量分数逐渐减小,270℃时柴油质量分数降至0.43%;馏出汽油馏分中的正构烷烃、异构烷烃和环烷烃的体积分数变化不大,烯烃体积分数逐渐增大,芳烃体积分数逐渐减小,辛烷值略有升高;馏出馏分中的硫质量浓度逐渐下降,且苯并噻吩和甲基苯并噻吩的质量浓度降至不超过1.8 mg/L;较适宜的塔釜温度为270℃,在此温度下操作,馏出馏分的各项性质指标均显示出良好的平行性。FCC liquid products were fractionated with a spinning band distillation apparatus. The effect of column reactor temperature on the proper- ties of distillate fractions was＇ investigated. The re- sults showed that with decreasing the column reactor temperature from 300 ℃ to 270 ℃ ,the yield of dis- tillate fractions decreased,the mass fraction of gaso- line in the distillate fractions increased gradually, and that of diesel oil decreased and reached 0.43% at 270 ℃ ; the volume fraction of n - alkanes, iso - alkanes and naphthenes in the distillate gasoline changed little, the volume fraction of olefins in-creased,and that of aromatics decreased, the octane number increased slightly;the mass concentration of sulfur in the distillate fractions decreased, and that of the benzothiophene and methylbenzothiophene de- creased to no more than 1.8 mg/L. The appropriate column reactor temperature was 270 ℃, and at this temperature,all the properties indexes of the distill- ate fractions reached excellent equlibrium.

关 键 词：催化裂化 旋转带蒸馏仪 塔釜温度 馏出馏分 汽油组成 汽油辛烷值 硫化物 含硫量 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]