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1. 发明授权

US4422903A Anhydrous ethanol distillation method and apparatus 失效
标题翻译：无水乙醇蒸馏法及装置
公开(公告)号：US4422903A
公开(公告)日：1983-12-27
申请号：US234771
申请日：1981-02-17
申请人： John R. Messick , William R. Ackley , George D. Moon, Jr.
发明人： John R. Messick , William R. Ackley , George D. Moon, Jr.
IPC分类号： B01D3/06 , B01D3/14 , C07C29/80 , B01D3/36 , C07C31/08
CPC分类号： B01D3/065 , B01D3/148 , C07C29/80 , Y02P20/57 , Y10S203/09 , Y10S203/14 , Y10S203/20
摘要： An improved distillation method and apparatus are provided for recovering anhydrous ethanol from fermentation or synthetic feedstocks. The system includes at least one stripper-rectifier tower, a dehydrating tower, and an azeotropic agent stripping tower. Substantial energy savings are realized by operating the dehydrating tower, and preferably also the azeotropic agent stripping tower, at a higher pressure than the stripper-rectifier tower and by condensing the overhead vapors from the dehydrating tower (or dehydrating tower and azeotropic agent stripping tower) to provide the heat required in the stripper-rectifier tower. In a preferred embodiment, two stripper-rectifier towers are used, one operating at a higher pressure than the other, in which case the higher pressure tower is heated as just described and the overhead vapors from the higher pressure tower are condensed to supply the heat required in the lower pressure tower. Further energy savings are accomplished by preheating the feedstock by means of the heat contained in the stripper-rectifier tower overhead (the lower pressure stripper-rectifier tower in the case where two such towers are used) and also by the heat contained in the stripper-rectifier bottoms.
摘要翻译：提供了一种改进的蒸馏方法和装置，用于从发酵或合成原料中回收无水乙醇。该系统包括至少一个汽提塔整流塔，脱水塔和共沸剂汽提塔。通过在比脱汽塔整流塔更高的压力下操作脱水塔，优选共沸剂汽提塔，并通过冷凝来自脱水塔（或脱水塔和共沸剂汽提塔）的塔顶蒸气来实现大量节能，以提供汽提塔 - 整流塔中所需的热量。在优选实施例中，使用两个汽提塔整流塔，一个在比另一个更高的压力下工作，在这种情况下，如上所述加热高压塔，并且来自高压塔的塔顶蒸气被冷凝以供应热量需要在低压塔。进一步的节能是通过借助于汽提塔 - 整流塔顶部中包含的热量（在使用两个这种塔的情况下的低压汽提塔 - 整流塔）以及包含在汽提塔 - 整流底部。

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