Mixing And Dispersion Performance In Horizontal Looped Stirred Reactor

Characteristics of circulation, mixing and liquid-liquid dispersion in the horizontal looped stirred reactor have been researched systematically. The effects of four impellers [LXl, LX2, A310and A315] on circulation velocity and mixing time were investigated at agitation speed ranging from600to2100rpm. The experiment indicated that the flow state of the reactor was a topical turbulence. The impeller named LXl produced higher circulation velocity and less mixing time at the same speed, but poor ratio of power number over circulation number compared with the other three agitator. The effects of the rotation time, agitation speed, sampling position and phase ratio on the liquid-liquid system of drop size and distribution was studied using LXl impeller. Drop size and distribution in every part of the reactor was a similar state. It was found that the Sauter mean drop size was well correlated to the maximum drop size, which well agreed with previous investigations. The Sauter mean diameter in the heat conduction oil with dispersant water system were suggested as following equations:below the critical stirred speed, the equation could be simplified to d32/D=0.07(1+8.76Φ)(We)-0.6; while higher than the critical speed, it became d32/D=10(-4.28+0.65Φ)(We)0.18.