A kind of clean production method of starch-based fuel ethanol

A fuel ethanol and clean production technology, applied in the biological field, can solve the problems of high material consumption and energy consumption, poor system integration optimization of the whole plant, and low degree of automation.

Active Publication Date: 2011-12-21
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the traditional fuel ethanol production method has problems such as low degree of automation, high material consumption and energy consumpti...

Method used

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  • A kind of clean production method of starch-based fuel ethanol
  • A kind of clean production method of starch-based fuel ethanol
  • A kind of clean production method of starch-based fuel ethanol

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The process of producing fuel ethanol from corn starch is as follows:

[0038] 37.7t / h corn (starch content is 65%, moisture content is 14%) is crushed to an average particle size of 2mm and sent to the pre-liquefaction tank, adding 84.6t / h mixing water, α-amylase 22kg / h, Obtain a slurry with a dry matter mass content of 26.5%. In order to mix the slurry evenly, the tank is equipped with an agitator, and the slurry is preheated to 78°C and then sent to a pre-liquefaction tank. In the pre-liquefaction tank, the above-mentioned slurry Heated by direct steam to 86°C, the stirrer drives the insoluble material into a stable suspension. When operating at full load, the residence time of slurry in the tank is 40min.

[0039] Then the slurry is pumped to the jet liquefier, and the outlet temperature of the steam jet is controlled to be 105° C. to obtain heated mash. The heated mash is sent to the cooking column and kept at 105°C for 1.5h for cooking and slaking. The matured ...

Embodiment 2

[0046] The process of producing fuel ethanol with dried cassava as raw material is as follows:

[0047] 20t / h dried cassava chips (68% starch content, 12% water mass content) were crushed to an average particle size of 3mm and sent to the pre-liquefaction tank, 40t / h mixing water was added, and α-amylase 12.5 kg / h to obtain a slurry with a dry matter content of 29.3%. In order to mix the slurry evenly, the tank is equipped with an agitator, and the slurry is heated to 75°C and then sent to the pre-liquefaction tank. In the pre-liquefaction tank, The above slurry is heated to 84°C by direct steam, and the stirrer promotes the insoluble matter to reach a stable suspension state. When operating at full load, the residence time of slurry in the tank is 30 minutes.

[0048] Then the slurry is pumped to the jet liquefier, and the outlet temperature of the steam jet is controlled to be 106° C. to obtain heated mash. The heated mash is sent to the cooking column and kept at 106°C fo...

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Abstract

The invention relates to a clean production method of starch-based fuel ethanol, which includes the following steps: (1) liquefaction, (2) saccharification, (3) fermentation, (4) distillation and dehydration, and also includes comprehensive treatment of waste residues and recycling of by-products section. Among them, the liquefaction section adopts a low-pressure ejector continuous cooking process; the fermentation section adopts a semi-continuous fermentation system to keep the fermented mash in a flowing state and promote the uniform contact between yeast and mash; The combination tower with wine vapor heating on the top of the tower, the thermal coupling scheme of the crude distillation tower with wine vapor heating on the top of the combined tower, the obtained anhydrous ethanol is mixed to obtain denatured fuel ethanol, the quality meets the national standard GB18350-2001, and passed The waste residue comprehensive treatment and by-product recycling section recycles waste residue and useful substances in waste gas. In this method, the heat exchange network and water network of each production section are reasonably matched, and the goal of clean production with low material consumption and energy consumption and full resource utilization is realized.

Description

technical field [0001] The invention belongs to the field of biotechnology, and relates to a clean production method of starch-based fuel ethanol, in particular to a method for producing fuel ethanol by using starch-based raw materials such as corn, cassava, and sweet potato. Background technique [0002] The alcohol industry refers to the industry that uses cereals, potatoes, and molasses as raw materials to produce edible alcohol, industrial alcohol, and fuel ethanol through fermentation and distillation. It is an important basic raw material industry for the national economy. In recent decades, with the soaring price of oil and the rapid development of biotechnology, the use of biomass as raw material to produce fuel ethanol, which is used to replace vehicle fuel and reduce harmful substances in vehicle exhaust, has become more and more widely used. [0003] In 2007, the total amount of wastewater discharged by my country's alcohol industry was about 400 million tons, and...

Claims

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Application Information

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IPC IPC(8): C12P7/14C12P19/14A23K1/06C05F5/00C12R1/865A23K10/38
CPCY02A40/20Y02P60/87
Inventor 余伟俊陈新德岳国君王年忠吴德旺赵二永熊莲唐兆兴姜新春周宏才韩品谦马建智黎进英张正会何鹏
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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