A SIMPLIFIED MODEL OF HYDRODYNAMICS IN AIRLIFT LOOP REACTORS

被引:9
|
作者
ONKEN, U
TRAGER, M
机构
[1] Abteilung Chemietechnik Lehrstuhl Technische Chemie B, Universität Dortmund, Dortmund 50, D-4600
来源
BIOPROCESS ENGINEERING | 1990年 / 5卷 / 03期
关键词
D O I
10.1007/BF00388192
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
As a function of the gas throughput the following parameters were measured in an external loop reactor with a riser diameter of 0.6 m and a gassed liquid height of 8.6 m: integral and local values of gas hold-up; liquid velocities; mixing times and axial dispersion coefficients of the liquid phase. The height of the reactor could be altered by reconstruction. Measurements were also carried out with lower heights than 8.6 m. Besides pure water, aqueous solutions of coalescing, non-coalescing and viscosity-increasing substances were used as model systems. With the results a general relationship between superficial gas velocity, gas hold-up and liquid velocity was established. This hydrodynamic model uses the relative velocity between gas and liquid phase as the fundamental parameter. The generally valid model consists of one term for the homogeneous and of two additional terms for the heterogeneous flow regime. © 1990 Springer-Verlag.
引用
收藏
页码:129 / 139
页数:11
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