CAJ | 학술논문

研究了78.5L气升式环流反应器内部结构对流动性能的影响规律，并给出最佳区间来为工业装置提供理论指导。利用 Fluent 软件建立数学模型与实验装置作对比，模拟了不同气液分离区高度与外筒高度比、导流筒长度与外筒长度比和筒内外直径比对流动行为的影响规律。结果表明：数学模型和实验结果误差较小，可以用来预测气升式环流反应器流动行为。气液分离区高度与外筒高度比值过大会导致环流阻力增大，从而不利于流动，比值为0.34～0.36时流动性能最佳；导流筒长度与外筒长度的比值增大可增加气含率和环流液速，但是比值过大会引起气泡的聚合，从而影响流动性能，当比值为0.60～0.62时流动性能最佳；在一定范围内增加内外筒直径比会改善流动效果，但环隙面积过小会增加环形阻力，内外筒直径比为0.73～0.77时流动效果比较理想。
연구료78.5L기승식배류반응기내부결구대류동성능적영향규률，병급출최가구간래위공업장치제공이론지도。이용 Fluent 연건건립수학모형여실험장치작대비，모의료불동기액분리구고도여외통고도비、도류통장도여외통장도비화통내외직경비대류동행위적영향규률。결과표명：수학모형화실험결과오차교소，가이용래예측기승식배류반응기류동행위。기액분리구고도여외통고도비치과대회도치배류조력증대，종이불리우류동，비치위0.34～0.36시류동성능최가；도류통장도여외통장도적비치증대가증가기함솔화배류액속，단시비치과대회인기기포적취합，종이영향류동성능，당비치위0.60～0.62시류동성능최가；재일정범위내증가내외통직경비회개선류동효과，단배극면적과소회증가배형조력，내외통직경비위0.73～0.77시류동효과비교이상。
The influence of internals on 78.5L airlift loop reactor was studied and optimal values were obtained for theoretical guidance of industrial equipment. Fluent software was used to establish a mathematical model to compare with experiment result. The influence of height ratio between gas liquid separation zone and external tube,length ratio between diversion tube and external tube,and diameter ratio between diversion tube and external tube on flow behavior of airlift loop reactor was investigated. The error between simulation and experiment results was small,and the mathematical model could be used to predict flow behavior of airlift loop reactor. Circulation resistance became larger when length ratio between gas liquid separation zone and external tube was too large. Reactor flow achieved the best performance when the ratio was 0.34—0.36. Increasing length ratio between diversion tube and external tube could increase gas holdup and liquid circulation rate,but an overly large ratio would cause bubbles coalescence,which would affect flow performance. Reactor flow achieved the best performance when the ratio was 0.60—0.62. Increasing diameter ratio between diversion tube and external tube could improve flow. Loop resistance was larger when ring gap area was too small and reactor flow achieved the best performance when diameter ratio was 0.73—0.77.