中文摘要：

提升管反应器具有高效的传递与输送性能，流化床反应器可为反应时间较长的气固催化反应提供良好的反应环境，因此二者得到了广泛的工业应用，近年来，集成提升管与流化床优点的耦合反应器也在工业上得到了成功应用。

英文摘要：

A large-scale cold model experimental setup of a riser-fluidized bed coupled reactor was established according to the olefin reduction technology with an auxiliary reactor for FCC naphtha upgrading. Distributions of particle velocity in the riser section were experimentally investigated in the setup. Furthermore, the restriction index of particle velocity was defined to quantitatively show the restriction effects of the riser outlet lotus-shaped distributor and the upper fluidized bed on the particle flow behavior in the riser. The experimental results showed that the riser eould be divided into two regions in the longitudinal direction, i.e. , lower traditional transport region and upper restriction region. In the longitudinal direction, the averaged cross-sectional particle velocity in the traditional transport region increased firstly, and then tended to be smooth, while decreased in the restriction region. With the increase of static bed height in the upper fluidized bed, the local particle velocity decreased, and the tendency of change in the core region is more than that in the wall region. Restrietion effects of the lotusshaped distributor and the upper fluidized bed on particle flow behavior enhanced with the increases of superficial gas velocity, solids flux and static bed height in the upper fluidized bed. In the same crosssection, outlet restriction effects enhanced with the increase of the dimensionless radial position r/R, and would not change when r/R≥0. 5.