文献类型：期刊文献

英文题名：Investigation of pressure drop in a moving bed

作者：Chen, Yun-Hua; Zhu, Xue-Dong; Wu, Yong-Qiang; Zhu, Zi-Bin

机构：[1] Institute of Chemical Technology, East China University of Science and Technology, Shanghai 200237, China

年份：2006

卷号：6

期号：5

起止页码：697

外文期刊名：Guocheng Gongcheng Xuebao/The Chinese Journal of Process Engineering

收录：EI(收录号：20065110317661)

语种：英文

摘要：The pressure drop of gas flowing through the cross-flow moving-bed was investigated in a two-dimension rectangular apparatus. The effects of particles flow rate, superficial gas velocity, formation and development of cavity/raceway and voidage of particles on the pressure drop were investigated experimentally with the operation conditions of 0-1.35 m / s of superficial gas velocity and 0.95~9.68 cm / min of particle velocity. The experimental results show that the particle velocity has little influence on the pressure drop; the phenomena of cavity and pinning occur when the cross-flow velocity is high enough. The development of a cavity or a raceway can cause three types of pressure drop with time, which are stabilization, slight fluctuation and severe fluctuation. The pressure drop of moving-bed can be calculated by Ergun's equation at low velocity of cross-flow gas. Cavity appears in a process cycle of "formation-growing up-collapsing-fluidization" at high gas velocity. On the basis of experimental results, a model for calculating the pressure drop when a cavity occurs and a dimensionless relationship of cavity size is deduced, which agree with the experimental data.