作　　者： ; ;

机构地区： 华南理工大学化学与化工学院

出　　处： 《华南理工大学学报（自然科学版）》 1999年第6期10-15,共6页

摘　　要： 研究了传统圆柱型和三种不同结构缩放型导流筒气升式内环流生物反应器的气相含率，用排液体积法和压差法分别测定了总气相含率、下降区气相含率及分离区气相含率，并通过质量衡算求得上升区气相含率．实验结果表明，气相含率随通气速率提高而增大，三种不同缩放结构参数导流筒的气相含率较接近，且均高于传统圆柱型导流筒气相含率；对于空气—ＣＭＣ溶液系统，随着介质粘度增加，气相含率下降２％～５％；对于三相系统，随着固含率增加，气相含率提高１％～４％． Gas holdup in an internal loop airlift bioreactor was studied, the bioreactor consists of one conventional draft tube and three convergence_divergence draft tubes. Gas holdups in the whole reactor, the downcomer, and the separator were measured by the volumetric method and the differential pressure method, respectively. Gas holdup in the riser was derived from material balance equation. It was shown that gas holdup increases with the increasing of gas velocity, gas holdups among the convergence_divergence draft tubes are close and they are higher than those of the conventional draft tube. Gas holdup decreases by 2%～5% with the increasing of CMC solution viscosity under two_phase system air-CMC solution, and which increases by 1%～4% with the increasing of resin particles loading under three_phase system air-water-resin particl_ es. The correlation for calculating gas holdup, which is correlated by operating conditions and structural parameters, was obtained from the least square method.

关 键 词： 生物反应器 缩放型导流筒 气相含率 气升式

领　　域： [化学工程]