Rectification technique for separating ethanol, acetone and butanol fermentation mash

Abstract

The invention relates to a distillation process method for separating ethanol-acetone-butanol fermentation mash. The distillation process method comprises the following steps: the fermentation mash is added from the middle part of a mash tower, a total solvent with the content of 93 percent discharged from the top of the tower enters the upper half part of a butanol tower, the waste mash discharged from the bottom of the tower enters a flash tank; a side mining section is arranged at the middle-upper part of the mash tower, the phase separation is carried out, heavy phases return to the mash tower, ight phases enter the middle-upper part of the butanol tower; the flash evaporation is carried out on the waste mash to 85 DEG C through a heat pump, secondary steam and fresh steam are mixed and then enter the bottom part of the mash tower for heating; the side mining section is arranged at the middle part of the butanol tower, the cooling phase separation is carried out, light phases return to the mash tower, and heavy phases return to the mash tower; and the follow-up section adopts the ordinary distillation process method for carrying out the separation. The distillation process method improves the working efficiency and the stability, greatly reduces the energy consumption during the distillation process of the ethanol, acetone and butanol mash and has significant practicality and economic benefits.

Description

technical field [0001] The invention relates to a rectification process for fermented mash, in particular to a rectification process for separating ethanol, acetone and butanol from fermented mash, specifically using heat pump technology and side mining technology to extract the fermented mash from the fermented mash through rectification Process separation process of ethanol-acetone-butanol fermentation mash. Background technique [0002] Ethanol, acetone and butanol are excellent organic solvents, and are the main raw materials for coatings, plastics and rubber, biofuels and other products, and are widely used in organic synthesis, plastics, resins, paints, pharmaceuticals and defense industries. In particular, the production of Ethylene Butane (ethanol, acetone and butanol) solvents using non-grain crops as raw materials is the direction of future development. The conventional process uses multiple towers such as mash tower, butanol tower, ethanol tower and acetone tower...

AI Technical Summary

Problems solved by technology

Because of the very low content of butyl alcohol in the mash, about 2% (weight), and the solvent content after passing through the mash tower and butanol tower is only about 75%, the separation task in the downstream section is relatively heavy, m

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