液体黏度对气液固逆流三相湍动床动力学行为的影响
Effect of liquid viscosity on hydrodynamic behavior in inverse three-phase turbulent bed作者机构：天津大学化工学院天津300072
出 版 物：《化工学报》 (CIESC Journal)
年 卷 期：2005年第56卷第4期
页 面：627-631页
核心收录：
学科分类：0710[理学-生物学] 07[理学] 09[农学] 071007[理学-遗传学] 0901[农学-作物学] 090102[农学-作物遗传育种]
主 题：逆流三相湍动床 微电导探针 局部相含率 径向分布 特征表观气速 液体黏度 流型
摘 要：Local phase holdups in an inverse three-phase turbulent bed of 150 mm i.d. and 4350 mm height were measured simultaneously by micro-electrical conductivity probe technique in this *** experiments were carried out with polyethylene particles （dp=4.01 mm, ρs=926 kg·m -3）,air, and water[0.05%（mass）SCMC, 0.20%（mass）SCMC] as solid phase,gas phase and liquid phase respectively.540 sets of experimental data of local phase holdups in radial direction were obtained under Ug=U g3. It was found that the distribution of local solid holdup showed a maximum peak at r/R=（0.75—0.90）. The range of maximum peaks was larger than that of conventional fluidized beds. The distribution of local gas holdup in radial direction showed a maximum value at the column center and a minimum value near the ***,the non-homogeneous distribution of local gas holdup in radial directions was more evident than that of conventional fluidized *** different operation regimes as well as the corresponding three specific gas velocities （U g1 ,U g2 and U g3） were obtained on the basis of the axial distribution characteristics of cross-sectional average solid *** effect of the operating conditions （liquid viscosity, initial volume fraction of solids H s0/H0, initial liquid height H l0 ） on the specific gas velocities was presented.
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