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Novel pre-cooking method for alcohol production

A pre-cooking and new method technology, applied in the direction of biofuel, fermentation, etc., can solve the problems of easy agglomeration and unfavorable liquefaction of corn particles, and achieve the effect of enhancing the extraction effect, improving the conversion rate, and increasing the yield of fermentation alcohol

Inactive Publication Date: 2017-03-08
长春吉粮天裕生物工程有限公司榆树分公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a new method of precooking for alcohol production, which is used to solve the problem that the primary heating of the mash cooking liquefaction stage in the traditional alcohol production process is to directly pass steam into the precooking tank for heating, and the mash Corn grains in the liquid are easy to form agglomerates, which is not conducive to the technical problem of liquefaction

Method used

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  • Novel pre-cooking method for alcohol production

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1, the novel method of ethanol production precooking is characterized in that: comprise the following steps, and following steps are carried out sequentially,

[0035] Step 1. Weigh the corn flour through a belt scale and transport it to the mixing tank. Add water to the mixing tank and mix. The mass ratio of corn flour and water is 1:2.4. The corn flour and water are stirred and mixed. The volume of the slurry is 70% of the volume of the mixing tank. Add liquefying enzyme into the mixing tank through a metering pump, set the temperature of the mixing tank at 58° C., and adjust the pH value of the slurry to 5.4 with a NaOH aqueous solution with a mass concentration of 42%. The water is fresh process water mixed with evaporator condensed water;

[0036] Step 2. Transport the slurry in step 1 to the precooking tank through the slurry delivery pump. During the transportation process, the slurry is sheared and heated by the steam injector, and the working tempera...

Embodiment 2

[0045] Embodiment 2, the novel method of ethanol production precooking is characterized in that: comprise the following steps, and following steps are carried out sequentially,

[0046] Step 1. Weigh the corn flour through a belt scale and transport it to the mixing tank. Add water to the mixing tank and mix. The mass ratio of corn flour and water is 1:2.4. The corn flour and water are stirred and mixed. The slurry volume is 90% of the volume of the mixing tank. Add liquefied enzyme into the mixing tank through a metering pump, set the temperature of the mixing tank at 60°C, and adjust the pH value of the slurry to 40% NH4OH aqueous solution with a mass concentration of NH3 5.8, where water is fresh process water mixed with evaporator condensate;

[0047] Step 2. Transport the slurry in step 1 to the precooking tank through the slurry delivery pump. During the transportation process, the slurry is sheared and heated by the steam injector, and the working temperature of the ste...

Embodiment 3

[0056] Embodiment 3, the novel method of ethanol production precooking is characterized in that: comprise the following steps, and following steps are carried out sequentially,

[0057] Step 1. Weigh the corn flour through a belt scale and transport it to the mixing tank. Add water to the mixing tank and mix. The mass ratio of corn flour and water is 1:2.4. The corn flour and water are stirred and mixed. The volume of the slurry is 80% of the volume of the mixing tank. Add liquefied enzyme into the mixing tank through a metering pump, set the temperature of the mixing tank at 59°C, and adjust the pH value of the slurry to 5.6 with an aqueous NaOH solution with a mass concentration of 52%.

[0058] Step 2. Transport the slurry in step 1 to the precooking tank through the slurry delivery pump. During the transportation process, the slurry is sheared and heated by the steam injector, and the working temperature of the steam injector is set at 87°C. , the slurry after shearing and...

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Abstract

The invention discloses a novel pre-cooking method for alcohol production, and belongs to the technical field of alcohol production methods. The novel method comprises the following major steps: blending corn flour, conducting primary shear heating by virtue of a steam ejector, conducting pre-cooking, conducting secondary shear heating by virtue of the steam ejector, conducting cooking, conducting flash evaporation, conducting liquefying, conducting saccharifying, decreasing temperature and conveying an obtained material to a fermenting process. In a conventional alcohol production process, primary heating in a fermenting mash cooking and liquefying stage is conducted by directly filling steam into a pre-cooking tank for implementing heating, which causes shortcomings that corn particles in fermenting mash are easily clotted and are not conducive to liquefying. According to the novel method provided by the invention, the fermenting mash is directly ejected by steam through the steam ejector, so that firstly, a shear effect is taken on the fermenting mash, which is conducive to the dissolving and liquefying of starch particles, secondly, the method is beneficial for full heating and sterilizing, and thirdly, the method is capable of reducing a sugar residue rate, enhancing a starch extraction effect of the corn flour and improving a conversion rate and fermented alcohol yield in subsequent saccharification; and meanwhile, with the declination of residual sugar, color grade of feed, as a by-product, is improved, and the color grade of the feed is an important factor affecting feed cost.

Description

technical field [0001] The invention belongs to the technical field of alcohol production methods, in particular to a new method for alcohol production and precooking. Background technique [0002] The corn dry base starch content is 70% to 72%. Starch is divided into two parts by hot water treatment: one part is very soluble in warm water, the viscosity of the aqueous solution is small, and there is unstable, which can be precipitated after standing, called amylose; the other part is insoluble in warm water , Only under heating conditions can it be dissolved in water and form sticky dextrin, which is called amylopectin. Regardless of amylopectin or amylose, its molecular structure is based on glucose as the basic unit. In general starch granules, the amount of amylose is less, about 20%. [0003] Starch is a white tiny granule, insoluble in cold water and organic solvents, inside the granule is a very complex crystalline structure, under the observation of a microscope, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/06C12P19/14
CPCC12P7/06C12P19/14Y02E50/10
Inventor 张邦国许长胜刘玉奇
Owner 长春吉粮天裕生物工程有限公司榆树分公司
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