CFD数值模拟用于130m^3气升式内环流发酵罐改造  

CFD numerical simulation for technical renovation of 130m^3 internal-loop airlift reactor

作　　者：张庆文[1] 石东升[1] 温佳文[1] 骆巍 陶慧 洪厚胜[1,2] 

机构地区：[1]南京工业大学生物与制药工程学院,江苏南京210009 [2]南京汇科生物工程设备有限公司,江苏南京210009

出　　处：《现代化工》2012年第11期105-108,共4页Modern Chemical Industry

基　　金：国家"863"计划重点项目(2012AA021201)

摘　　要：针对130 m3气升式内环流反应器不能满足酵母发酵工艺传质混合要求,以及气含率过高装料系数达不到要求的实际情况,提出在气升式生物反应器上升管中加置内件的改造方案,并采用CFD(computational fluid dynamics)对改造前后的气液传质进行了模拟。模拟结果显示,加置内件可以有效地促进气泡的分散,改善气液两相的混合,强化氧传递过程。改造后,气含率下降,装料系数明显提升,酵母产量得到提升。Due to the unsatisfactory mass transfer effects and charging coefficient of the yeast airlift reactor, the renovation program is put forward. CFD is used to simulate the mass transfer process before and after renovation. The simulation results show that adding inner devices （sieves） to the riser of an internal-loop airlift reactor can promote the bubbles dispersion, improve the mixing process of gas-liquid mixture and enhance the oxygen transfer effectively. After renovation, the gas holdup decreases. The charging coefficient increases obviously. The yield of biomass is improved.

关 键 词：气升式内环流反应器 计算流体动力学 氧传递 气含率 改造 

分 类 号：TQ027[化学工程]