摘要
研究了搅拌槽中搅拌桨组合形式对气液氧传递特性的影响,主要采用Garcia-Ochoa和Gomez基于Higbie渗透理论提出的气液氧传递理论模型,在ANSYS CFX11.0软件基础上开发了用于模拟搅拌生物反应器中氧传递过程的方法。通过模拟比较了不同搅拌桨组合的气液氧传递系数,以及在有氧消耗和无氧消耗情况下反应器内饱和氧浓度的分布,发现上层为轴流式的三宽叶搅拌桨底层为径流式的六弯叶圆盘透平桨的组合形式氧供应能力最强,体积氧传递系数与桨的形式没有直接关系,同样的搅拌桨安装在不同的桨组合中或在不同的操作条件下所形成的体积氧传递系数是有差别的。
The influence of impeller combination on the The theoretical model of gas-liquid oxygen transfer p gas-liquid oxygen transfer in stirred tank was investigated roposed by Garcia-Ochoa and Gomez based on Higbie＇s penetration theory was used to simulate the process of gas-liquid oxygen transfer in stirred bioreactors with commercial software of computational fluid dynamics （CFD） ANSYS CFX 11.0. The gas-liquid oxygen transfer coefficient and steady-state distribution of oxygen concentration with and without oxygen consumption were both simulated and compared under different er combinations. It shows that the combination with upper axial impeller and downer radial impeller possesses the highest between the volume oxygen transfer coefficient and oxygen supply capacity, and there is no direct relationship er type, the same impeller installed with different impeller combinations produces different volume oxygen transfer coefficient.
出处
《化学工程》
CAS
CSCD
北大核心
2009年第8期28-31,共4页
Chemical Engineering(China)
关键词
搅拌槽
气液氧传递系数
CFD模拟
搅拌桨组合
stirred tank
gas-liquid oxygen transfer coefficient
CFD simulation
impeller combination
