Abstract: The technologies of distillation and dehydration for producing fuel-grade ethanol from dilute fermentation broths have been studied，and a partial condensation technique in the overhead condenser is proposed. This proposed technique is compared through simulation using commercial software with the original process and the anhydrous ethanol reflux azeotropic distillation technique recently developed with emphasis on the energy efficiency of each process. Both the partial condensation technique and the anhydrous ethanol reflux azeotropic distillation technique show great advantage in energy saving according to the simulation results.

摘要： 围绕由生物质发酵醪液生产燃料乙醇过程中精馏与脱水工艺展开研究，提出了精馏塔塔顶部分冷凝技术。通过计算机模拟，着重从能耗方面将该方案与常规工艺以及最近出现的回流段无水乙醇共沸精馏技术进行比较。结果表明，部分冷凝工艺和回流段无水乙醇共沸精馏流程节能效果显著。