| 摘要 |
PURPOSE:To raise productivity by circulating a fermentation solution between a fermentation tank and a vacuum flash tank and to aim reduction in energy by condensing alcoholic vapor vaporized in the vacuum tank and concentrating it in a permeating vaporizer. CONSTITUTION:In a device for producing continuously an alcohol by the use of an alcohol-producing mold, the fermentation tank 2 is provided with a raw material and carries out alcohol fermentation and the vacuum flash tank 7 is provided with an alcohol-containing solution from the tank 2 and vaporizes and separates the alcohol component. The condenser 9 condenses alcohol- containing vapor from the tank 7 and the permeating vaporizer 17 is charged with a condensed solution from the condenser 9, permeates and vaporizes the condensed solution through the functional permeating membrane 18 so that the alcohol is concentrated and recovered. Further, the conduit 13 for circulating an unevaporated solution from the bottom of the tank 7 to the tank 2 is set and the alcohol concentration in the tank 2 can be adjusted to a low value. Consequently, improvement in productivity and reduction in energy can be realized. |
