Six-column differential-pressure distillation device for extra edible alcohol and process therefor

Abstract

The invention discloses a six-tower distilling device and technology of superfine edible spirit, which comprises the following parts: crude distillation column, vacuum aldehydo-removing column, water scrubber, fractionating tower, methanol column and recycling tower, wherein the mature ferment fermented glutinour rice is preheat in the ferment procedure, which enters into the top of crude distillation column; the crude distillation column is negative pressure, whose top wine gas enters in the vacuum aldehydo-removing column through separator after cooling sequently; the aldehydo-removing wine on the bottom is sent into feeder layer of water scrubber after preheating, which flows desalination wine after extracted by micro-negative pressure water in the fractionating tower to proceed positive pressure distillation; the spirit intermediate product is led into the methanol column from top wine hole of fractionating tower to remove menthol, which obtains superfine edible spirit; the steam condensate of fractionating tower reboiler is recycled in the autoclave of recycling tower after flash-boiling disposal, which flows through methanol column reboiler, water scrubber and crude distillation column to proceed secondary condensing by reboiler.

Description

technical field [0001] The invention relates to an alcohol production process and its device, in particular to a six-tower differential pressure distillation process and its device for the production of super edible alcohol. technical background [0002] Alcohol production differential pressure distillation technology is a distillation technology developed by the alcohol industry in recent years. The existing mainstream differential pressure distillation technology is listed in "Alcohol and Distilled Wine Technology" (Edited by Zhang Kechang, China Light Industry Press, September 2002), " All have detailed discussions in documents such as the newly edited alcohol technology "(published by Beijing Chemical Industry Press University Textbook Publishing Center in July, 2004). Many alcohol factories in China have adopted the five-tower differential pressure distillation process. Standards for super edible alcohol products follow the national standard [GB10343-2002]. However, f...

AI Technical Summary

Problems solved by technology

However, for the five-tower differential pressure distillation process in the prior art, generally only high-grade edible alcohol can be produced, and the impurities in the alcohol cannot be further eliminated, so it cannot be used to produce special-grade edible alcohol

[0003] In order to produce special-grade alcohol, a six-column differential pressure distillation process has appeared. There is a six-column differential pressure distillation process including a beer column, a crude auxiliary column, a water extraction column, a rectification column, a demethanolization column, and a treatment column containing miscellaneous fractions. The device can be used to produce super edible alcohol, but the steam consumption per ton of wine is more than 2.7-2.8t / t wine steam, and a large amount of industrial alcohol needs to be extracted at the same time, about 15% or more (for the production of general premium alcohol, take Industrial alcohol is normal below 3%), and the production is unstable; there is also a six-tower differential pressure distillation unit comprising a beer tower, a water extraction tower, a rectification tower, a methanol removing tower, a fusel oil tower and an industrial alcohol tower, Although it can produce super edible alcohol, the steam consumption is often as high as 3.3 to 3.4 tons of steam, and the energy consumption is relatively high

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