高长径比气液固三相内环流反应器的流体动力学  

Hydrodynamics on gas-liquid-solid three-phase internal-loop airlift reactor with big ratio of height to diameter

作　　者：王宇[1] 

机构地区：[1]抚顺矿务局职工工学院,辽宁抚顺113008

出　　处：《化学工程师》2015年第6期21-25,共5页Chemical Engineer

摘　　要：在高径比为22的三相内环流反应器中,常温常压下,根据动量平衡原理建立了空气-水-石英砂三相物系的循环液速模型,并建立了上升区气含率、上升区固含率和底部换向区阻力系数模型;考察了在不同颗粒粒径下,表观气速对上升区固含率和液体循环速度的影响。结果表明:当粒径(ds)≤0.3mm时,上升区固含率随表观气速的增加变化呈平缓趋势,当0.3mm<ds≤1.2mm时,上升区固含率随表观气速的增加而呈先下降后增加的趋势;不同粒径下上升区循环液速均随表观气速的增加而增加;气含率、固含率和循环液速的计算值和实验值吻合较好,其平均相对误差分别为6.32%、4.56%和11.97%。Based on the momentum balance principle to establish a liquid circulation velocity model of the air - water - quartz sand three-phase on three-phase internal-loop airlift reactor wsa esoabkusged with the big ratio （height/inner diameter=22） of height to diameter, under normal temperature and atmosphere, the model of the gas holdup of riser, solid holdup of riser, frictional loss coefficient of riser and frictional loss coefficient of the bottom of the reversing the bottom of the reversing of drag coefficient were obtained by using correlation method; At different particle size, the effects of superficial gas velocity on solid holdup in riser and liquid circulation velocity were inves- tigated for the system. The results showed that the solid holdup in riser gentle with the increase of the superficial of gas velocity at sands particles ≤0.3mm and increase after the first drop with the increase of the superficial of gas velocity at sands particles 〉0.3mm while ≤ 1.2mm. The liquid circulation velocity increased with the increase of the superficial gas velocity at different particle size. Gas holdup, solid holdup and liquid circulation velocity of the cal- culated and experimental values are in agreement, the average relative errors of gas holdup, solid holdup and liquid circulation velocity between calculated and experimental values were 6.32%, 4.56% and 11.97%.

关 键 词：内环流反应器 循环液速 阻力系数 气含率 固含率 动量平衡 

分 类 号：TQ052[化学工程]