Measurement Of Solid-Liquid Suspension And Gas-Liquid Dispersion In A Side-Entering Tank

Solid-liquid suspension is one of the most common processes in mixing. It is significant to measure location of agitators in a side-entering stirred tank for industrial manufacturing. The influence of horizontal and vertical angle on the size and the positions of depositions zone was studied. The horizontal optimum angle is a≥8°and Vertical optimum angle is βi=5°The influences of agitator number and superficial gas velocity on the power number were studied in a tank of φ2000mm X4200mm with side-entering agitators. The results indicate that a constant power number was obtained at a higher Reynolds number3×105in side-entering tank than Reynolds number104in conventional tank, and the extent of gas phase on power consumption decrease is28%of conventional agitated tank.The gas-liquid mass transfer coefficients KLa with jet and network gas distributing devices have been investigated under same power number and the results shown that a jet gas distributing devices is about3times better performance of mass transfer than network gas distributing devices.The formula of mass transfer coefficient of jet gas distributing devices is KLa∝(P/VL)0.161(VG)1.125and the network gas distributing devices is KLa∝(VG)1.778.The investigation provides reference to design of the side-entering agitated tanks.At the same time, based on the function provided by the commercial CFD code (CFX), the local liquid velocities were simulated in the side-entering stirred tank. The results obtained from numerically simulating are in good agreement with experimental data.