关键词: 单级旋转精馏床, 减压精馏, 乙醇/水, 传质性能

Abstract: Using stainless steel corrugated wire mesh packing, the separation of co-boiling system (ethanol/water) was studied by using the high gravity vacuum distillation. The effects of the ethanol mass fraction of feed x_f (50%~95%), the operating pressure P (101.33~11.33 kPa) and average high gravity factor β (20.90~130.64) on the mass transfer property of ethanol/water system were studied. In this experiment, the running of the single-stage higeedistillation equipment was stable and the mass transfer property increased first then decreased with increasing β. And it increased with decreasing P and increasing x_f , and broke the azeotropic point when P was 11.33 kPa. Under the same conditions, the separation effect of the single-stage higee distillation equipment was higher than that of the traditional tower. The mass transfer property was 7.94~14.20 mm, only 1/6~1/4 of the traditionl tower. Mass transfer property was significantly enhanced. The energy consumption analysis showed that the gravity device itself was small and easy to reach the desired degree of vacuum, reducing energy consumption significantly.

Key words: single-stage higee, vacuum distillation, ethanol/water, mass transfer property