气升式反应器结构参数优化设计CFD仿真研究

CFD simulations for structural parameter design of airlift bioreactors

气升式反应器是生物发酵生产过程中的重要设备,工业生产过程中要求反应器内保持较高的气含率和循环液速,从而提高气液传质效率。由于气升式反应器的导流筒直径对气含率和循环液速有决定性影响,研究其结构参数优化设计具有重要意义;文章利用计算流体力学仿真软件研究了气升式反应器内的流动状态,给出了不同导流筒直径下气含率和循环液速的变化趋势,发现了该结构参数存在最佳设计范围。

The aeration efficiency of the internal airlift bioreactor depends highly on the gas holdup and liquid circulation velocity, on which the inner tube diameter has a direct impact. In this study, the change trends of the gas holdup and liquid circulation velocity as the inner tube diameter changes are investigated by means of the CFD software. The results demonstrate that there is an optimal inner tube diameter for the airlift bioreactor.