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/(m2?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.

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/(m2?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 30o downward scheme can be expected to realize a desired mixing.