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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。近壁上流区液相速度可作为固液悬浮搅拌槽设计的重要参数
The self-developed two-electrode conductivity probe was used to measure the influence of solid particles on the liquid velocity in a 0.75m × 0.75m × 1m square stirred tank. The experimental results show that the apparent discharge flow rate of axially pumped liquid propeller increases with the addition of solid particles with higher density than water, but the actual discharge capacity does not increase. The liquid velocity in the upper wall near the wall decays The attenuation amplitude varies with the concentration of the solid phase. Due to the addition of solid particles, the liquid phase velocity at the bottom of the agitation tank decayed and the attenuation amplitude is smaller than that of the upper wall. The velocity of the liquid in the upper wall near the wall is proportional to the speed of stirring. When the impellers of different diameters have the same conveying power, the liquid velocities of the upper wall near the wall are equal. The liquid velocity near the upper wall can be used as an important parameter in the design of solid-liquid suspension stirred tank