RFCC化学汽提过程的模拟研究  

Numerical study on RFCC chemical stripping process

作　　者：刘英杰[1,2] 杨基和[1] 蓝兴英[2] 高金森[2] 

机构地区：[1]常州大学江苏省绿色催化材料与技术重点实验室,江苏常州213164 [2]中国石油大学(北京)重质油国家重点实验室,北京102249

出　　处：《化工学报》2016年第8期3244-3250,共7页CIESC Journal

基　　金：国家重点基础研究发展计划项目(2012CB215003);国家自然科学基金项目(21306014);江苏省绿色催化材料与技术实验室开放课题基金资助项目(BM2012110)~~

摘　　要：采用欧拉模型耦合反应模型对重油催化裂化环流汽提段内的化学汽提过程进行了模拟研究,考察了汽提段内的颗粒体积分数分布、油气组分分布以及高温再生剂的加入对汽提效果的影响,并与实验值进行了对比。结果表明模拟结果与实验数据基本吻合。模拟得到的汽提段底部颗粒体积分数约为0.3～0.45,而在上部迅速降低至0.2左右。由汽提段底部向上,气体组分和汽油组分含量（质量分数）显著增加,在床层上部达到了20%左右,重组分含量显著降低至床层上部的约30%,而柴油组分含量保持在30%左右变化不大。随着再生剂的加入,汽提段顶部气体组分和汽油组分的含量增加,重组分和柴油组分的含量减小,当再生剂加入量为60%时,重组分含量降至18%。Numerical simulation was adopted to study the chemical stripping process in an annular resid fluid catalytic cracking（RFCC） stripper coupling Eulerian model as well as desorption, thermal cracking and catalytic cracking models. Solid volume fraction distributions and species contents in the gas oil along the stripper were investigated. Furtherly, the effect of adding high temperature activated catalysts in the catalyst inlet on stripping was analyzed. The results showed that the simulation results were in acceptable agreements with the experimental data. The simulated solid volume fraction at the bottom of the stripper was about 0.3—0.45, while in the upper section it showed a sharp decrease to 0.2. From bottom up, the contents of gas and gasoline components increased significantly to about 20% at the top, those of heavy components decreased to nearly 30% and of diesel components about 30% do not change much. With adding high temperature activated catalysts in the catalyst inlet, the contents of gas and gasoline components at the gas outlet increased, while those of diesel and heavy components decreased. When adding 60% of activated catalysts, the content of heavy components decreased to 18%.

关 键 词：石油 催化裂化 汽提 化学反应 计算流体力学 

分 类 号：TQ018[化学工程]