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Improved wet method for producing fuel ethanol

A technology of fuel ethanol and wet process, which is applied in the field of wet degerming of corn, can solve the problems of ethanol production by wet process, long process flow, and loss of oil extraction, etc., so as to speed up water absorption and softening, reduce investment, increase The effect of sewage

Inactive Publication Date: 2005-07-27
吉林省石油化工设计研究院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The former cannot realize the value of the non-fermented components of corn, especially the high-value corn oil, which has been lost several times in the process of dry ethanol production, and even if it is extracted from DDGS, most of the oil has been lost
The main advantage of the latter is that each component of corn can be separated relatively purely, which effectively improves the economic benefits of deep processing of corn, but suffers from long process flow, high energy consumption and large investment. Therefore, wet production Ethanol has not been popularized in China

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0015] Put 50Kg of purified corn with a water content of 13.6% used in the production of the ethanol plant into an 80L cone soaking tank, add the centrifugal supernatant with a pH value of 3.5 and a solid content of 3.8% obtained from the ethanol plant site, and use a circulating pump And the circulation heater circulates the clear liquid, so that the temperature in the tank rises to 60 ° C, and keeps it for 4 hours. The soaking liquid is discharged, and the solid content is measured to be 5.8%. The soaked corn is crushed with a convex tooth mill , using the floating method to separate the germ, the yield of the germ is 6.1%. After the separation, the starch slurry is desaccharified and fermented, distilled, and dehydrated to produce absolute ethanol. The separated wet germ can be used for oil extraction after washing and drying.

Embodiment 2

[0017] Put 50Kg of purified corn with a water content of 14% used in the production of the ethanol plant into an 80L cone soaking tank, add the centrifugal supernatant with a pH value of 3.9 and a solid content of 4.0% obtained from the ethanol plant site, and use a circulating pump And the circulation heater circulates the clear liquid, so that the temperature in the tank rises to 62 ° C, and keeps it for 8 hours. The soaking liquid is discharged, and the solid content is measured to be 6.3%. The soaked corn is crushed with a convex tooth mill , using the floating method to separate the germ, the yield of the germ is 6.3%. After the separation, the starch slurry is desaccharified and fermented, distilled, and dehydrated to produce absolute ethanol. The separated wet germ can be used for oil extraction after washing and drying.

Embodiment 3

[0019] Put 50Kg of purified corn with a water content of 15.5% used in the production of the ethanol plant into the 80L cone soaking tank, add the centrifugal supernatant with a pH value of 3.6 and a solid content of 4.2% obtained from the ethanol plant site, and use a circulating pump And the circulation heater circulates the clear liquid, so that the temperature in the tank rises to 65 ° C, and keeps it for 12 hours. The soaking liquid is discharged, and the solid content is measured to be 6.8%. The soaked corn is crushed with a convex tooth mill , using the floating method to separate the germ, the yield of the germ is 6.6%. After the separation, the starch slurry is desaccharified and fermented, distilled, and dehydrated to produce absolute ethanol. The separated wet germ can be used for oil extraction after washing and drying.

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Abstract

The improved wet process of producing fuel ethanol includes soaking purified corn in centrifugal clear liquid from the ethanol producing process inside soaking tank at 60-65 deg.c for 4-12 hr; returning the soaked dilute corn slurry into ethanol produce step for producing DDGS, twice crushing soaked corn and twice plumule separation to obtain corn powder slurry, diastatic fermentation, distillation and dewatering to obtain absolute ethanol alcohol, and washing and drying the separated plumule for further oil squeezing. The process is simple, short and low in cost and can separate corn plumule for raised economic utility.

Description

Technical field: [0001] The invention relates to a corn wet degermination technology, in particular to an improved wet degermination pulping method for producing fuel ethanol. Background technique: [0002] The production of fuel ethanol from corn plays an important role in the industrial use of corn. The current main production methods are dry method and wet method. The dry method does not separate any non-fermented components in the corn, and directly grinds the corn into coarse powder and adds water to make a corn flour slurry as a fermentation raw material; the wet method uses traditional corn wet grinding. Process, the non-fermented components such as fat, fiber and protein in corn are separated to make refined starch milk for fermentation. The former cannot realize the value of the non-fermented components of corn, especially the high-value corn oil, which is lost several times in the dry ethanol production process, even if it is extracted from DDGS, most of the oil h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10L1/02
Inventor 郭景勋高云春王丹玉徐光
Owner 吉林省石油化工设计研究院
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