导流筒结构对环流反应器内流体动力学的影响  

Hydrodynamics of airlift reactors with different draft tubes

作　　者：郄思远[1] 高飞[1] 俞旭峰[1,2] 刘春江[1] 

机构地区：[1]天津大学化工学院,天津300072 [2]天津市天大北洋化工设备有限公司,天津300072

出　　处：《化学工程》2015年第6期42-45,69,共5页Chemical Engineering(China)

摘　　要：建立了一套气升式环流反应器的拟二维模型装置,使用水、空气作为物系进行实验,使用粒子成像测速技术研究了不同气量下导流筒结构对反应器内流体动力学的影响,并建立模型使用CFD方法对其进行了二维及三维模拟。实验结果表明:随着上升区面积的增大,下降管内液速增大,当上升区与下降区面积相等时,环流流量最大。二维模拟与实验结果基本吻合,证明该模型计算结果的有效性,三维模拟结果进一步表明,影响环流流量的关键因素不是直径比,而是上升区面积与下降区面积比。A 2-D airlift loop reactor（ 2-D ALR） was developed. The hydrodynamics in 2-D ALR with different baffles was investigated with two phases（ air and water）. PIV experiment was carried out to investigate the hydrodynamics of the 2-D ALR with different draft tubes. Then 2-D and 3-D simulations were carried out by CFD method to study the flow behavior in the experiment. It shows that the area ratio of riser / downcomer influences the hydrodynamics in ALRs. The liquid velocity in downcomer increases with the increasing of draft tube diameter,whereas the liquid circulation flow rate reaches the maximum when the sectional area of the risers is equal to that of the downcomer. The result reveals a satisfactory agreement between the 2-D simulation and the experiment.Furthermore,the results of 3-D simulation indicate that the key factor of deciding liquid circulation flow rate is area ratio of riser / downcomer rather than diameter ratio.

关 键 词：气升式环流反应器 流体动力学 导流筒 粒子成像测速技术 计算流体力学 

分 类 号：TQ052[化学工程] TQ021.1