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.
出处
《化学反应工程与工艺》
EI
CAS
CSCD
北大核心
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
