摘要
在两只塔径为0.112和0.188m 的导流管鼓泡塔中测量了空气—水体系的气含率εg和氧传递系数 K_(La)。当表观操作气速 V_g 相同时,导流管鼓泡塔的ε_g 和 K_(La)值均比鼓泡塔大。实验观察到ε_g 随 V_g 和导流管直径和塔径比 D_i/D_0的增大而增大,随着塔高和塔径比 H/D_0的增大而减小。K_(La)随 V_g增大而增大,随 H/D_0增大而略增大,但随D_i/D_0增大而减小。由实验数据得出计算 K_(La)和ε_g 的关联式,该式应用范围:D_0=0.112-0.188m,Vg=0.01-0.08m/s;H/D_0=4-10。
The present paper describes the measurment of gas holdup(ε_g)and the volumetric gas-liquid mass transfer coefficient in two draught tube columns of 0.112m and 0.188m in diameter in an air-water system. At the same superficial gas velocity(V_g),(ε_g)and(K_(1a))in the draught tube column are larger than those in the bubbule column.In the experiment,(ε_g) increases with increasing(V_g)and(D_i/D_0)and decreses with increasing(H/ D_0),(K_(La))increases with increasing(V_g),increases very slightly with increasing(H/D_0)and decreases with increasing(D_1/D_0). Based on experimental data,the correlation equtions for(ε_g)and(K_(La)) are proposed which are applicable to(D_0)=0.112m,0.188m,(V_g)=0.01-0.08 m/s,(H/D_0)=4-10.
出处
《化工冶金》
CSCD
北大核心
1990年第1期47-52,共6页
关键词
发酵罐
导流管型
气
含率
鼓泡塔
Airlift fermenter
Draught tube
Gas holdup Gas-liquid mass transfer
