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Alcohol production method

A production method and alcohol technology, which are applied in chemical instruments and methods, biofuels, organic chemistry and other directions, can solve the problems of low alcohol yield and high energy consumption, and achieve the advantages of improving ethanol yield, improving washing efficiency and saving energy consumption. Effect

Active Publication Date: 2013-11-20
安徽中粮生化燃料酒精有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the invention is to provide a new alcohol production method in order to overcome the high energy consumption and low alcohol yield in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0048] The first type, such as figure 1 As shown, the starch slurry is successively liquefied and saccharified, and the saccharification liquid obtained by saccharification is fermented and cultured to obtain CO-containing 2 Gas component A and fermentation mash; will contain CO 2 The gas component A is in contact with the scrubbing liquid for scrubbing to make CO 2 The ethanol in the gas component A is dissolved in the washing liquid to obtain the finished liquid; the fermentation mash is subjected to solid-liquid separation to obtain the fermentation clear liquid; the finished liquid and the fermentation clear liquid are distilled together to vaporize the ethanol therein, Obtain gaseous distillate B, condense gaseous distillate B to ethanol as a liquid, obtain liquid ethanol fraction C and gas component D; contact gas component D with water for washing, so that the gas component D Ethanol is dissolved in water to obtain liquid E after washing. The washing liquid is liquid E af...

Embodiment 1

[0061] use figure 1 The technological process of mixing starch material (corn flour) with water for beating, the obtained slurry is sequentially liquefied and saccharified, the saccharified liquid is fermented and cultivated, and the gas components (containing CO 2 The gas component A), and the CO contained during the fermentation process 2 The gas component A (the ethanol content is 0.84% ​​by volume) is introduced from the bottom of the first gas scrubbing tower and discharged from the top of the first gas scrubbing tower. The scrubbing liquid is introduced from the top of the first gas scrubbing tower and The bottom of the scrubber is discharged, so that the CO 2 The gas component A is in countercurrent contact with the scrubbing liquid, containing CO 2 The volume ratio of the gas component A to the scrubbing liquid is 1:0.0024, the contact time is 5.1 seconds, the reflux ratio of the scrubbing tower is 10, and the finished liquid is obtained after washing.

[0062] The fermenta...

Embodiment 2

[0064] use figure 2 The technological process of mixing starch material (corn flour) with water for beating, the obtained slurry is sequentially liquefied and saccharified, the saccharified liquid is fermented and cultivated, and the gas components (containing CO 2 The gas component A), and the CO contained during the fermentation process 2 The gas component A (ethanol content is 1.25% by volume) is introduced from the bottom of the first gas scrubbing tower and discharged from the top of the first gas scrubbing tower, and the scrubbing liquid is introduced from the top of the first gas scrubbing tower, The bottom of the scrubber is discharged, so that the CO 2 The gas component A is in countercurrent contact with the scrubbing liquid, containing CO 2 The volume ratio of the gas component A to the scrubbing liquid is 1:0.0031, the contact time is 4.2 seconds, the reflux ratio of the scrubbing tower is 8, and the finished liquid is obtained after washing.

[0065] The fermentation ...

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Abstract

The invention discloses an alcohol production method, which comprises the following steps of: (1) respectively carrying out liquefaction and saccharification on farinaceous size, and fermenting a saccharification liquid obtained by saccharification to obtain CO2-containing gas component A and a fermented liquor; (2) letting the CO2-containing gas component A contact with a washing liquid, washing, dissolving ethanol from the CO2-containing gas component A in the washing liquid to obtain a complete liquid; and carrying out solid-liquid separation on the fermented liquor to obtain a fermented clear liquid; (3) carrying out distillation on the complete liquid and the fermented clear liquid to obtain a gaseous distillate B, condensing the gaseous distillate B until ethanol is a liquid state, so as to obtain a liquid ethanol fraction C and a gas component D; and (4) letting the gas component D contact with water, and washing to obtain a washed liquid E. The invention is characterized in that the washing liquid comprises the washed liquid E and the concentration of ethanol in the washing liquid is not higher than 2.5% (volume). The alcohol production method provided by the invention is used to raise ethanol yield and reduce cost.

Description

Technical field [0001] The invention relates to a method for producing alcohol. Background technique [0002] Alcohol production methods generally involve two stages of fermentation and distillation. CO produced during the fermentation stage 2 When the gas components escape from the fermentation broth, part of the ethanol will be taken away, along with CO 2 The proportion of ethanol lost by evaporation of gas components to the total amount of ethanol is about 0.5-1.2%, with an average value of 0.8%. 2 The gas components are scrubbed. [0003] In the prior art, clean water is generally used to 2 The gas components are washed, and the washing is generally carried out in the gas scrubber. The gas scrubber generally adopts a packed scrubber. The clean water passes through the packing from the top of the tower downward, containing CO 2 The gas component escapes upward from the bottom of the tower, when it contains CO 2 When the gas component of the gas is in contact with the water in th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12P7/06C07C31/08C07C29/80C07C29/76
CPCY02E50/17Y02E50/10
Inventor 郭翠王佐柱李冬冬骆红侠
Owner 安徽中粮生化燃料酒精有限公司
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