中文摘要：

为改善提升管进料区气固两相不均匀混合状况,针对一套大型冷模实验装置的提升管,结合实验和三维数值模拟,研究了提升管进料区催化剂和进料相不均匀混合的形成机理,考察了操作参数的影响,基于不均匀混合形成机理提出了一种新进料方式.结果表明,传统斜向上进料方式导致进料区催化剂和进料相不均匀混合,合适的操作参数[颗粒循环速率Gs=80 kg/（m^2·s）,表观气速Ug=3.28 m/s,进料速度Ujet=62.5 m/s]可改善不均匀分布,将不均匀混合高度范围缩短约一半,但不均匀混合仍存在;新进料方式可实现快速均匀混合,尤其是向下30o进料方式.

英文摘要：

In order to improve the uneven mixing of catalyst particles and feed in a feedstock injection zone of FCC Riser, the formation mechanism of the nonuniform mixing is studied through both experiment and 3-D CFD simulation over a large-scale cold-model riser. The effects of operating conditions on the mixing behavior are further investigated. Based on the formation mechanism, a novel scheme of feedstock injection is proposed and compared with the traditional scheme. The result indicates that the traditional scheme of feedstock injection leads to the uneven mixing. A desirable operating condition [Gs=80 kg/（m^2·s）, Ug=3.28 m/s, Ujet=62.5 m/s] can improve the distributions of solids and feed, reduce the axial range of catalyst-feed mixing by half, but the uneven mixing persist. The novel design especially the 30 o downward scheme can be expected to realize a desired mixing.