CAJ | 학술논문

为了考察环流反应器放大过程中再分布板对其内部多相流动的影响，采用噢啦双流体模型模拟了再分布板不同高度的布置对环流反应器内气含率，循环液速，固体颗粒分布等参数的影响，并与部分冷模实验结果进行了比较，两者结果一致。结果表明，再分布板高度的增加会使气升反应区内气含率呈现先增后减的趋势，并导致导流管内的固含率上升。此外，不同高度的再分布对环流反应器内整体气含率及循环液速的影响不大。结合CFD模拟和实验结果，优化了环流反应器内再分布板的设计，从而为实现强化环隙气升式环流反应器内多相流动，传递，反应等过程提供了一定的指导意义。
위료고찰배류반응기방대과정중재분포판대기내부다상류동적영향，채용오랍쌍류체모형모의료재분포판불동고도적포치대배류반응기내기함솔，순배액속，고체과립분포등삼수적영향，병여부분랭모실험결과진행료비교，량자결과일치。결과표명，재분포판고도적증가회사기승반응구내기함솔정현선증후감적추세，병도치도류관내적고함솔상승。차외，불동고도적재분포대배류반응기내정체기함솔급순배액속적영향불대。결합CFD모의화실험결과，우화료배류반응기내재분포판적설계，종이위실현강화배극기승식배류반응기내다상류동，전체，반응등과정제공료일정적지도의의。
To investigate the effect of redistributors on the multiphase flows in the scale-up of airlift reactors, the Euler-Euler two fluid model are adopted to simulate the influence of redistributors on gas holdups, liquid circulation velocity and the distribution of solid concentration. The Computational Fluid Dynamics (CFD) model shows excellent agreement with the measured data on total gas holdup. This research demonstrates that the height of redistributors increasing can make gas holdup in the bubble riser non-monotone trend and promote the solid concentration in the downcomer, however, has little effect on the total gas holdups and liquid circulation velocity. Therefore, the design of redistributors have been optimized by combining CFD simulation and experiment, which is benefit for strengthening the processes of multiphase flow, mass-transfer, reactions in the airlift reactors.