催化裂化提升管出口超短快分的分离效率模型

Gas-Solid Separation Model of a Novel FCC Riser Terminator Device: Super Short Quick Separator (SSQS)

在冷模实验装置上,系统地考察了SSQS系统(超短快分系统)的气相流场和在系统中的分离性能。在此基础上,根据SSQS系统气固分离的分离原理,建立了计算SSQS系统分离效率的横混模型。该模型同时考虑了惯性分离和排气管结构对颗粒捕集的作用,通过最终的修正,该模型所预测的结果和实验结果吻合较好。模型计算结果表明:在最优尺寸比例下,分离效率的主要影响因素为分离器外壳与中心排气管的半径差以及颗粒的切向速度。

The gas flow field and the separation efficiency of a novel FCC riser terminal device named as Super Short Quick Separator （SSQS） were studied. On the basis of above investigations, a section-lateral-mixing separation model was proposed, which includes both the effect of inertia and structure of gas outlet on particles capture. After final modification, the results predicted with this model can be in good agreement with the cold experimental data. According to this model, the separation efficiency of SSQS is mainly influenced by the difference between the shell radius and center pipe radius and the magnitude of particle tangential velocity.