Liquid-liquid Dispersions Characteristics In The Horizontal Circulating Stirred Reactor

In this thesis, the performance of fluid circulation and liquid-liquid dispersions have been investigated in the horizontal circulating stirred reactor. The influence of impeller structure on flow number(NQ) and power number(NP) and impeller type, phase hold-up and phase viscosity on drop sizes and distributions have been analysed. By measuring the Np and Nq of impeller A310, LX1and E460, we can conclude that all of the three impellers are mixed flow impeller and screw LX1can generate larger circulation under the same power input per unit mass. Furthermore, as for the E-series impeller, the effect of blade installation angle, blade bending or straight, the radius of curvature and upper blade structure on Np and Nq have been researched. The flow velocity depends on the location, especially, the end of the reactor and impeller zone. The fluid in the circulation body is easy to form tangential flow. The measured d32values under phase holdup from0.05to0.2with impeller E460and LX1indicate that the relationship between d32and phase holdup is not linear. When dispersion phase viscosity rises, the values of da? increase, correspondingly. The double-peak distribution delays. Finally, the fitting formulas are proposed, and the experimental exponents of Weber number are close to the theoretical value.