摘要
针对费托合成浆态床反应器的特点,阐述了不同类型模型的特征,主要讨论了较为典型的双气泡模型和计算流体力学模型,并进行了两者的耦合。结果表明,考虑了轴向扩散的双气泡模型可以预测气泡速度、催化剂浓度和气体产物分布等随高度的变化以及不同条件下的转化率;将双气泡模型处理后的循环气和新鲜气以一定配比作为入口气体输入到计算流体力学模型中研究流场的变化,膨胀高度吻合高温高压中试规模浆态床的经验表达式,集液杯起到了很好的脱气作用,说明它可用于反应器中内构件的改进。
According to the characteristics of Fisher-Tropsch（F-T）synthesis slurry bubble column reactor（SBCR）,various models were selectively presented.The two typical models,the doublebubble model and the computational fluid dynamics（CFD）model were discussed in more detail,and coupled each other.The results showed that the double-bubble model with considering axial dispersion could predict the changes of bubble velocity and catalyst concentration with respect to the height and the conversions under different operating conditions.CFD model was employed to investigate the flow field and the influences of inner structures,where inlet gas was composed of treated recycle gas obtained by using double-bubble model and fresh gas with fixed ratio.The collection cup,for example,exhibited good degassing effect,which indicated that CFD could be used in the improvement of inner structures,besides,the expanding height was good agreeable with the empirical correlation obtained on the pilot-scale slurry bubble reactor with high temperature and high pressure.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2015年第5期1171-1178,共8页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家高技术研究发展"863"计划项目基金(2011AA05A202)资助
