气-固并流下行快速流态化的研究(I)  

Hydrodynamics of Concurrent Downflow Fast Fluidization ( I )

作　　者：祁春鸣[1] 俞芷青[1] 金涌[1] 白丁荣[1] 姚文虎[1] 

机构地区：[1]清华大学化工系联合应化工程研究所一部

出　　处：《化工学报》1990年第3期273-280,共8页CIESC Journal

基　　金：国家自然科学基金会资助课题

摘　　要：研究气-固并流顺重力场运动中气-固两相之间的相互作用,并依此将气-固运动过程分为第Ⅰ、Ⅱ加速段及恒速段.在直径为φ140mm,高为5.8m的下行快床中,测定了不同操作条件下(μ_g=1.3-10m/s,G_a=30-180kg/m^2·s)床层压力梯度轴向分布及第Ⅰ加速段长度的变化规律,同时考察了颗粒特性对上述过程的影响.On the basis of theoretical analysis and experimental study, the gas-solidinteraction in a concurrent downflow fast fluidized bed (CDFFB) with i. d. 140mm and height 5.8m was studied. In that case the gas-solids flow along the flow direction can be divided into three sections: the first acceleration section, the second acceleration section and the constant velocity section. The axial pressure gradient profile and the length of the first acceleration section were measured under different operating conditions (gas velocites in the range of 1.3 to 10m/s and solids circulating rates in the range of 30 to 180 kg/m2·s) and different particle properties (four kinds of particle were used).

关 键 词：气相 固相 并流下行 流态化 流化床 

分 类 号：TQ051.13[化学工程]