GLS-MALR中的气含率和循环液速

Gas Holdup and Liquid Circulation Velocity in GLS-MALR

在1个四流道的气-液-固三相多室气升式环流反应器(MALR)中,以空气-水-K树脂为体系,考察了气体表观速率、固体装载量对气含率和循环液速的影响。结果表明,上升室的气含率随着该室气体表观速率的增加而增加,而随着另一上升室气体表观速率的增加而略有降低;下降室的气含率随着该室气体表观速率的增大而略有增加;上升室和下降室的气含率均随固体装载量的增加而降低;循环液速随着上升室气体表观速率的增加而增加,而随着固体装载量的增加而降低。在鼓泡流下,用关联式法建立了上升室的气含率模型;根据动量平衡原理建立了循环液速模型。气含率和循环液速的计算值和实验值的平均相对误差分别为±5.755%和±9.362%。

The effects of superficial gas velocity and solid loading on gas holdup and liquid circulation velocity were investigated for the system of air-water-（K-resin） particles in multi-compartment airlift loop reactor of gas-liquid-solid three phases,comprising a vertical column divided into four channels.The result showed that the gas holdup of one specified riser increased obviously with the increase of the superficial gas velocity of this riser and decreased slightly with that of the other riser.The gas holdup of the downcomer increased slightly with that of another riser.Both gas holdups of riser and downcomer decreased obviously with the increase of the solid loading.The liquid circulation velocity increased obviously with the increase of the superficial gas velocity and decreased with the increase of the solid loading.Under the bubble flow regime,the model of the gas holdup of riser was obtained by using correlation method.The model of liquid circulation velocity was established by momentum balance.The average relative errors of gas holdup of riser and liquid circulation velocity between calculated and experimental values were ±5.755% and ±9.362%,respectively.