GAS-SOLIDS FLOW PATTERNS IN A CONCURRENT DOWNFLOW FAST FLUIDIZED BED(CDFFB)

作     者：白丁荣 金涌 俞芷青 甘宁俊 

作者机构：Dept.of Chem.Eng.Tsinghua UniversityBeijing 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：1991年第2期

页      面：171-181页

核心收录：

学科分类：0817[工学-化学工程与技术] 08[工学] 

主　　题：averaged radial solids concurrent fluidized hasbeen centration circulating annular downward 

摘      要：Radial profiles of solid concentration and velocity for concurrent downward gas-solid suspension in a140mm inside diameter fast fluidized bed were *** influence of gas velocity,solid circulating rateand axial position on radial profiles of solid concentration and particle velocity has been *** hasbeen found that an annular region of high solid concentration exists at r/R=*** both the center and wallregion,the solid concentration and the particle velocities are relatively *** shape of radial solid con-centration profile curves is mainly dependent on the cross-section averaged voidage,and the shape of radialparticle velocity profile is mainly affected by the gas velocity and cross-section averaged *** on the radial profiles of solid concentration and particle velocity,the solid mass flux profile and thenonuniformity of solids flow are discussed in this *** is shown that solids flow in CDFFB is much moreuniform than that in UFFB.