三相气升式反应器的CFD模拟及分析  

CFD simulation and analysis of a three-phase airlift bioreactor

作　　者：王双 阮静雯 吴越 成卓韦 陈东之 陈建孟 Wang Shuang;Ruan Jingwen;Wu Yue;Cheng Zhuowei;Chen Dongzhi;Chen Jianmeng(College of Environment,Zhejiang University of Technology,Hangzhou Zhejiang 310014,China;School of Petrochemical Engineering&Environment,Zhejiang Ocean University,Zhoushan Zhejiang 316022,China)

机构地区：[1]浙江工业大学环境学院,浙江杭州310014 [2]浙江海洋大学石油化工与环境学院,浙江舟山316022

出　　处：《石油化工》2021年第1期34-39,共6页Petrochemical Technology

基　　金：国家自然科学基金项目(51778581,52070169)。

摘　　要：为了研究硅酮母粒对气升式生物反应器流态性能的影响,以气含率和液相流速为评估指标,采用欧拉三相流模型对反应器进行计算流体力学模拟和参数优化。模拟结果表明,反应器气含率和液相流速与进气流速呈正相关,进气量为3 L/min时反应器上升区和下降区气含率分别为17.1%和9.1%,液相流速分别为17.5 cm/s和24.6 cm/s,与实测值误差小于5%,证明了模型的合理性和适用性;硅酮母粒含量(VS)由5%(φ)增至15%(φ)的过程中,反应器中气体分散程度和液相流速整体上有所降低,VS=10%(φ)时反应器内既能实现完全流化又能维持较高的气含率和液相流速;硅酮母粒的粒径与颗粒孔隙率影响三相间的能量传递,最适粒径为1.0 mm,最佳孔隙率为70%。The model based on Eulerian model was built for computational fluid dynamics simulation and parameter optimization of an airlift bioreactor containing silicone masterbatch.Gas holdup and liquid velocity were investigated to evaluate the bioreactor performance.The results showed that gas holdup and liquid velocity were positively associated with airflow.The gas holdup reached 17.1%and 9.1%respectively while liquid velocity reached 17.5 cm/s and 24.6 cm/s in the riser and downcomer of the reactor under the gas flow rate of 3 L/min,which were basically consistent to experimental results with an error less than 5%and proved the rationality and applicability of numerical simulation.The gas distribution uniformity and liquid velocity declined generally with silicone masterbatch(solid)loading(VS)increased from 5%(φ)to 15%(φ).The reactor achieved full fluidization while kept relatively high gas holdup and liquid velocity at 10%(φ)VS.The particle diameter and porosity affected the energy transfer among the three phases and the simulation results showed the optimal particle diameter and porosity were 1.0 mm and 70%respectively.

关 键 词：硅酮母粒 气升式生物反应器 CFD模拟 流体力学 

分 类 号：TQ018[化学工程]