超重力精馏过程传热传质机理

uring high gravity distillation process, the heat and mass transfer unit is liquid film. Mathematic model of temperature of gas and liquid in counter-current high gravity device was developed based on its structure packed (Higee) with wave wire packing, and heat and mass transfer theory. Distillation experiment process was investigated to proof test the mathematic model developed with two Higees using ethanol/water at the test conditions of atmospheric pressure, feedstock flow rate of 20 L•h-1, concentration of alcohol of 20% (mass) for feedstock, rotating speed of 800 r•min-1, reflux ration of 1. Higees used have the same structure rotors whose properties of inner radius was 29 mm, outer radius was 63 mm and height in axis was 32 mm. The wave wire packing used in rotor has the properties of diameter of 1.6 mm, porosity of 0.85, specific surface of 1750 m2•m-3.Comparing experimental data with the data calculated by correlation, the average deviate obtained for gas temperature in inner radius site for rectifying section and outer radius for stripping section was 7.4 and 4.9%, respectively, implying that the accuracy of correlations developed was reasonable.