摘要
研究了一种矩形截面气升式环流反应器,用幂律τ=η_ογ~n(n<1)来表示流体流变学特性的变化.在这类反应器中,假塑性非牛顿流体的气含率ε_g与传质系数K_La的变化规律可用半经验关联式表示ε_g=0.2535(η_ο5000^(n-1))^(-0.161)(1+A_d/A_r)^(-0.434)u_(gr)^(0.856-0.161n)K_La=0.0192(η_ο5000^(n-1))^(-0.902)(1+A_d/A_r)^(-1.228)u_(gr)^(1.955-0.902n)并讨论了该类反应器结构及运行状况,流体性质变化时,反应器传质动力学特性、流动特性和操作弹性变化的规律.
A rectangular channel air lift bioreactor, which has good properties of mass transfer and hydrodynamics, better operation sensitivity than traditional ALR, was studied. The parameters of KLa and εg of mass transfer and hydro dynamics were experimentally studied by using CMC aqueous solutions of different concentrations. The research showed that when the rheological properties of pseudoplastic non-Newtonian fluid could be described by τs=ηγn thus
By using the above correlation, the performance of the bioreactor was discussed with regard to the structure of reactor, fluid properties, and operation condition.non-Newtonian fluid, rectangular air-lift reactor, gas hold-up, mass transfer coefficients
出处
《化工学报》
EI
CAS
CSCD
北大核心
1992年第5期627-634,共8页
CIESC Journal
关键词
非牛顿流体
反应器
气含率
传质
non-Newtonian fluid, rectangular air-lift reactor, gas hold-up, mass transfer coefficients
