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首页> 外文期刊>Chemical Engineering Science >Comparison of the hydrodynamics and mass transfer characteristics of a modified square airlift reactor with common airlift reactors
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Comparison of the hydrodynamics and mass transfer characteristics of a modified square airlift reactor with common airlift reactors

机译：改进型方形空运反应堆与普通空运反应堆的流体动力学和传质特性比较

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摘要

A modified square airlift loop reactor (MSALR) was developed.Experiments were performed to investigated the effects of the ratio of height and diameter of draft tube(H_r/D_r), and the ratio of cross-sectional area of riser and downcomer (A_r/A_d) on gas holdup,liquid circulation velocity and mixing time in the MSALR.A comparison of these characters as well as the total volumetric mass transfer coefficient was carried out between MSALR and round airlift loop reactor (RALR).Finally,the mixing time within the MSALR,RALR and square bubble column(SBC) was also studied.The results indicate that the hydrodynamic characteristics of MSALR are better when H_r/D_r=11.2 or A_r/A_d=0.695,and its characteristics of gas holdup and mass transfer surpass those of RALR.The average volumetric mass transfer coefficient K_La of MASALR is about 40% larger than that of RALR,except for extreme conditions.
机译：研制了改进的方形气举环流反应器（MSALR），通过实验研究了引流管的高高比（H_r / D_r），立管和降液管截面积比（A_r / A_d）对MSALR中的气体滞留率，液体循环速度和混合时间进行了比较。对这些特性以及MSALR与圆形气举式环流反应器（RALR）之间的总体积传质系数进行了比较。结果表明，当H_r / D_r = 11.2或A_r / A_d = 0.695时，MSALR的水动力特性更好，其气体滞留率和传质特性均优于那些。除了极端条件外，MASALR的平均体积传质系数K_La比RALR大40％。

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