V型导流结构的环形喷动床颗粒喷动实验研究

novel annular spouted bed, which consists of two concentric hollow cylinders with different diameter, was developed. There are some inlets and V shape deflector symmetrically arranged in the spacing of bottom surface between the two hollow cylinders for spouting obliquely. The flow behavior of particles in the spouted bed was investigated. The effects of inlets structure, different kinds of particle or size, hold-ups on the spouted fluidizing behavior of particle in the annular spouted bed were discussed. The results show that there are three different regions of particles flow in the annular spouted bed, the packed moving region, the dense-phase spouted fluidizing region and dilute-phase entrainment region on top of annular space. With the increase of hold-ups, the packed moving region is limited in V shape deflector, but the dense-phase spouted fluidizing region tend to increase in the annular spouted bed. On the condition of same hold-ups, the height and the pressure drop of each region tend to decrease with the particle size of feed material. The structure of air inlets and deflector has important affect to the heights and the pressure drop of each region in the annular spouted bed.