三重环流生物流化床的流体力学与传质特性  

HYDRODYNAMICS AND MASS TRANSFER OF TRIPLET LOOP BIOLOGICAL FLUIDIZED BED

作　　者：韦朝海[1] 谢波[1] 吴超飞[1] 任源[1] 陈焕钦[1] 

机构地区：[1]华南理工大学化工学院

出　　处：《化学反应工程与工艺》1999年第2期166-173,共8页Chemical Reaction Engineering and Technology

基　　金：国家自然科学基金;广东省自然科学基金

摘　　要：从气相含率、液体循环速度和体积氧传质系数方面研究自行设计新型结构的三重环流生物流化床的流体力学与传质特性。流化床反应器的有效体积２３Ｌ，实验条件是以空气为气相，水为液相，树脂为固相，固含率分别为０％、３％、６％和９％。实验结果表明，气相含率是影响反应器流体力学与传质特性的主要因素，气相含率增大可降低液体循环速度，增大体积氧传质系数。与单重环流反应器相比较，在相同的实验范围内，三重环流可提高气相含率１０％～２０％，提高体积氧传质系数１０％以上。Hydrodynamics and mass transfer of triplet loop biological fluidized bed reactors were studied in terms of gas holdup, liquid circulation velocity and volumetric mass transfer coefficient. The effective volume of the experimented reactor is 23 liter. The reactor was performanccd for both of airwater or airwaterresin particle system, solids loading are 0%, 3%, 6% and 9% respectively. It was bound from experiments that the main factor affecting hydrodynamics and mass transfer is gas holdup. Liquid circulation velocity decreases with increase in the gas holdup, whereas volumetric mass transfer coefficient increases with it. Compared with performance in conventional loop reactor, the gas holdup in triplet loop reactor increases by ten to fifteen percent, and volumetric mass transfer coefficient in triplet loop reactor increases by over ten percent. A correlation for calculating volumetric mass transfer coefficient was developed, which is correlated by physical parameters and operating conditions.

关 键 词：三重环流 生物流化床 流体力学 传质 废水处理 

分 类 号：X703[环境科学与工程—环境工程] X505