The effects of alcohol purification from impurities in depuration column

Currently to the quality of ethyl alcohol increased requirements. The task of this research was to examine the effects of alcohol depuration and development of new methods of calculation based on the model of theoretical plates. The paper examines the work depuration column at different modes. Were composed material balance equation and it is calculated concentration distribution of ethanol on the plates of the column. Further we obtained equations for estimating the effects of ethanol purification from the accompanying impurities. The carries out calculations have shown that when depuration column working with water selection method observed the significant decrease in the concentration of ethanol on her plates. As a result, increases the coefficient evaporation of impurities, which considerably improved it concentration. But it fortress of epurate reduced, which may degrade the performance of the distillation column and result in a loss with the bottoms liquid. It was therefore reviewed variant with the installation of the stripping part on depuration column, thereby increasing the concentration of ethanol in epurate and reduced the content in it of organic acids and other tail impurities that are discharged with liquid from her cube. Having recorded material balance equation for the stripping part, it was determined that are no losses of alcohol with cube liquid are. With some assumptions, from the equations of material balance are obtained the equations allowing estimating proportion of tail impurities withdrawn with cube liquid. The calculations have shown that more than half of the tail impurities incoming to the depuration column removed from her cube.