摘要
采用自行研制的双电极电导探针 ,在 0 .75m× 0 .75m× 1m方形搅拌槽中 ,测定了玻璃珠 水体系中固体颗粒对液相速度的影响。实验结果表明 :加入密度大于水的固体颗粒后 ,轴流式向下泵送液体搅拌桨的表观排出流量准数增大 ,但实际排液能力并不增加 ;近壁上流区液相速度衰减 ,衰减幅度随固相浓度不同而不同 ;由于固体颗粒的加入 ,搅拌槽底部液相速度衰减 ,与近壁上流区相比衰减幅度较小。近壁上流区液相速度与搅拌转速成正比 ;不同直径的搅拌桨 ,输送功率相同时 ,近壁上流区液相速度相等。
The influence of solid particles on fluid velocity was measured in a square stirred tank (0.75m × 0.75m×1m) with glass beads-water system. The local velocity of homogeneous phase of suspension was measured by an electric conductivity probe. The results showed that particles caused the downward velocity below the propeller increase and the upward velocity near the wall of tank decrease, respectively. The homogeneous phase velocity on the bottom of the tank also decreased. The upward velocities near the wall of the tank were approximately equal for different diameters of propeller when the power inputs were equal.
出处
《化学工程》
CAS
CSCD
北大核心
2002年第5期29-33,共5页
Chemical Engineering(China)
