Rectification Process Intensification at Partial Condensation

The work is aimed at intensification of the rectification process on the example of the study of binary mixture ethanol-water and multicomponent medium (alcohol condensate). The results of experimental studies of rectification at condensation of vapors on the plate surface, as well as on horizontally and vertically installed pipes are presented. It is shown that the efficiency of consolidation and separation of vapor mixture depends on the ratio of liquid and vapor streams, specific heat flux, temperature of the heat transfer surface and on the way of condensate film formation. The value of the temperature difference between the heat transfer medium supplied to the heat exchange surface and the condensing vapors, as well as the specific heat flux released by the condensing vapors, at which the greatest strengthening is achieved, has been established. The process of heat removal during boiling of flowing water film over the heat transfer surface, which provided a relatively low temperature difference during rectification, was realized, and heat transfer coefficients were calculated. The results of separation of multicomponent medium by partial condensation are presented, and the factors influencing the separation efficiency are established. According to the results of researches the deflegmator of the nozzle column has been approved, which allowed to obtain rectified alcohol with ethanol losses less than 1% wt. %.