CN101538588A - Technology for coupling the liquefaction process of corn alcohol and the concentration process of vinasse clear liquid - Google Patents
Technology for coupling the liquefaction process of corn alcohol and the concentration process of vinasse clear liquid Download PDFInfo
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- CN101538588A CN101538588A CN200910058674A CN200910058674A CN101538588A CN 101538588 A CN101538588 A CN 101538588A CN 200910058674 A CN200910058674 A CN 200910058674A CN 200910058674 A CN200910058674 A CN 200910058674A CN 101538588 A CN101538588 A CN 101538588A
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention belongs to the technical field of alcohol production, in particular relates to a technology for coupling the liquification process of corn alcohol and the concentration process of vinasse clear liquid. After being processed by the operations of pre-liquification and size-mixing, corn flour of the invention is sprayed and liquefied at the temperature from 105 to 135 DEG C and under the pressure from 0.1 to 0.15 MPa; starch granules are completely fractured, the gelatinization rate can reach 90 percent, and the high-temperature liquification is contributes to the increase of concentration of materials, thereby enabling the alcohol content of fermented mature mash to be improved to 14 percent (V/V); the liquefaction process and the concentration process of clear liquid are coupled, and indirect steam produced by the liquification process is used as a thermal source for the concentration process of clear liquid, thereby saving a great amount of external steam, evaporating and concentrating more clear liquid, contributing to the increase of recovery ratio of DDGS protein feed of each ton of alcohol; and vacuum equipment for the concentration process is utilized for lowering the temperature of the liquefied mash, and compared with the traditional mode of adopting a spiral plate for cooling, more cooling water can be saved.
Description
Technical field
The invention belongs to the Alcohol Production technical field, relate in particular to a kind of corn alcohol and produce liquefaction process and distiller's grains liquor concentration technology coupling technique.
Background technology
Alcohol is a kind of important basic industry raw material, can be divided into synthesis method alcohol and fermentation method alcohol according to the difference of its raw material technology.The production of fermentation alcohol is raw material with starchiness such as corn, potato class, cereal mostly both at home and abroad at present, wherein is that the raw material person is in the majority especially with the corn.With the corn is raw material production alcohol, is to be ground into Semen Maydis powder after corn is taken off embryo, liquefies then, ferments, and distills back output qualified alcohol at last.
In the corn alcohol production process, liquefaction process is at a certain temperature, utilize enzyme that the W-Gum in the Semen Maydis powder slurry is converted into the reducing sugar (mainly being glucose) that can be utilized by distillery yeast, comprise steps such as Semen Maydis powder is sized mixing, liquefaction in advance, steam ejection liquefaction, cooling.Warm steam ejection liquefaction was converted into fermentable sugar with W-Gum during the enterprise of traditional with the corn is raw material production alcohol mostly adopted, about 100 ℃ of the temperature of steam ejection liquefaction, the about 0.1MPa of pressure, adopt atmospheric flashing (90 ℃-95 ℃ of temperature) behind the steam ejection liquefaction, the secondary steam emptying is kept the back and is cooled off (being cooled to 60 ℃-65 ℃) with spiral heat exchanger.This liquefaction process has following shortcoming: the pressure reduction of steam ejection liquefaction is little, and corn starch granules is broken not thorough, gelatinization rate low (≤80%), raw material consumption height, production cost height; The energy has been wasted in the direct emptying of the secondary steam that produces after the flash distillation; Keep the back and adopt spiral-plate heat exchanger to cool off, the consumption of water is big.At the deficiency that this liquefaction process had, the manufacturer that has adopts vacuum flashing behind steam ejection liquefaction, or/and it is cold to adopt vacuum to dodge after keeping.Adopt vacuum flashing or/and adopt the vacuum sudden strain of a muscle cold, all need to dispose independently vacuum pump or adopt water yield squirt pump to vacuumize, can increase equipment cost, increase power consumption simultaneously, and only adopt vacuum flashing or/and adopt the vacuum sudden strain of a muscle cold, gelatinization rate (≤85%) still on the low side.
In the corn alcohol production process, can produce a large amount of vinasse when obtaining product alcohol after the distillation, vinasse are a kind of high pollution things, directly discharging will cause serious pollution to environment.Current general vinasse treatment technology is DDGS (Dry Distilled Grain Soluble) technology, being about to vinasse carries out reclaiming filter residue DDG after the solid-liquid separation, reclaim clear liquid behind the DDG the sizing mixing of workshop section that partly be used to liquefy, the part clear liquid is through evaporation concentration, and concentrated solution and filter residue combination drying obtain vinasse protein fodder DDGS.The DDGS technology is higher to the clearance of pollutent, environmental benefit is better, but because the investment and the working cost of evaporation concentration are higher, generally the 20%-40% clear liquid is back to sizing mixing of liquefaction workshop section at present, the clear liquid of 30%-40% is concentrated, and the clear liquid of all the other 20%-50% then enters sewage plant and handles.The pollutent that contains in the clear liquid is more, not only increases sewage disposal load and processing costs, and causes the rate of recovery of DDGS lower.
So this area presses for a kind of method of new production alcohol, make full use of the secondary steam energy that liquefaction process produces, the vacuum apparatus that makes full use of clear liquid concentration technology flow process, improve the rate of recovery, with the purpose that reaches energy-conservation, synergy, minimizing environmental pollution, reduces production costs clear liquid.
Summary of the invention
The objective of the invention is to overcome above shortcomings in the prior art, provide a kind of corn alcohol to produce liquefaction process and distiller's grains liquor concentration technology coupling technique, to reach energy-conservation, synergy, to reduce production costs, reduce the purpose of environmental pollution.
The technical scheme that realizes the object of the invention is as follows:
A kind of corn alcohol is produced liquefaction process and distiller's grains liquor concentration technology coupling technique, may further comprise the steps:
(1) after being taken off embryo, corn is ground into Semen Maydis powder;
(2) steam ejection liquefaction after Semen Maydis powder being sized mixing, liquefying in advance gets liquefied fermented glutinous rice, and the temperature of steam ejection liquefaction is 105 ℃～135 ℃, and pressure is 0.1～0.15MPa; The temperature of steam ejection liquefaction is preferably 115 ℃～135 ℃;
(3) liquefied fermented glutinous rice enters flash tank and carries out vacuum flashing, the temperature of vacuum flashing is 80 ℃～85 ℃, pressure is-0.02～-0.03MPa, the vacuum pressure of vacuum flashing is provided by the vacuum pump of clear liquid evaporation concentration workshop section, and the temperature that vacuum flashing produced is that 80 ℃～85 ℃ secondary steam is as the thermal source of clear liquid evaporation concentration;
(4) liquefied fermented glutinous rice after the vacuum flashing enter keep keep 1～3 hour under jar normal pressure after, entering the secondary flash tank again carries out getting the gelatinization wine with dregs after the secondary flash distillation, the temperature of secondary flash distillation is 80 ℃-85 ℃, pressure is-0.06～-0.07MPa, the vacuum pressure of vacuum flashing is provided by the vacuum pump of clear liquid evaporation concentration workshop section, and the temperature that vacuum flashing produced is that 80 ℃-85 ℃ secondary steam is as the thermal source of clear liquid evaporation concentration;
(5) the gelatinization wine with dregs-0.06～-the workshop section's fermentation of going to ferment after being cooled to 60 ℃-65 ℃ under the vacuum of 0.07MPa, the vacuum pressure of vacuum cooling is provided by the vacuum pump by clear liquid evaporation concentration workshop section;
(6) the fermented liquid distillation obtains finished product alcohol and wine lees liquor;
(7) wine lees liquor obtains wet vinasse and clear liquid after the whizzer solid-liquid separation;
(8) the separating obtained clear liquid of wine lees liquor enters well heater and carries out evaporation concentration, after separating, separator obtains concentrated solution and condensed water, obtain the DDGS feed after concentrated solution and the oven dry of wet vinasse drying machine, the condensed water recovery is used for Semen Maydis powder sizes mixing, and the thermal source of well heater is the secondary steam that twice vacuum flashing produced, the material vapour that dryer produces.
Can adopt the triple effect well heater that clear liquid is carried out evaporation concentration.When adopting the triple effect well heater, the separating obtained clear liquid of wine lees liquor enters one and imitates well heater and carry out evaporation concentration, imitates separator through one and imitates concentrated solution one after separating and enter one through the part circulation and imitate heater vaporizes and concentrate, and part enters the triple effect heater vaporizes and concentrates; Triple effect concentrated solution after the triple effect separator separates partly circulates and enters the triple effect heater vaporizes and concentrate, and part enters two and imitates heater vaporizes and concentrate; Imitate the isolating two effect concentrated solution circulations of separator through two and enter two effect well heaters, underflow goes to get the DDGS feed after dryer and the common oven dry of wet vinasse; Each is imitated separator and separates condensed water that the back obtains and reclaim and be used for Semen Maydis powder and size mixing; One thermal source of imitating well heater is the secondary steam that steam ejection liquefaction vacuum flashing is produced, two thermals source of imitating well heater are an effect secondary steam that separator produced and the material vapour of dryer, and the thermal source of triple effect well heater is the secondary steam that the two effect secondary steams that separator produced, the flash distillation of liquefied fermented glutinous rice secondary produce.
Corn alcohol of the present invention is produced liquefaction process and distiller's grains liquor concentration technology coupling technique, adopts the high temperature liquefaction process, and liquefaction process and clear liquid concentration technology are coupled.
Semen Maydis powder of the present invention is sized mixing, pre-liquefaction back is 105 ℃-135 ℃ in temperature, pressure is steam ejection liquefaction under the condition of 0.1-0.15MPa, starch granules breaks thoroughly, the gelatinization rate can reach 90%, compare with the gelatinization rate of existing technology, can improve 5-10 percentage point, starch transforms thoroughly, can reduce consumption (〉=3.1 tons of/ton alcohol of existing technology grain consumption of grain, technology grain of the present invention consumes≤3.05 tons of/ton alcohol), high temperature liquefaction helps improving the concentration of material, thereby that improves the fermenting-ripening wine with dregs contains the wine rate, can reach 14% (v/v), owing to contain the raising of wine rate, the karusen amount of producing alcohol distillation per ton reduces, thereby reducing the energy consumption that can further reduce distillation workshop section, the energy consumption that technology of the present invention can reduce distillation workshop section reaches about 30%; The discharging of impurity when high temperature liquefaction helps flash distillation, thus improve the quality of products; Can reduce the distillery waste water amount of producing alcohol per ton, distillery waste water output≤10 of biomass to alcohol conversion process of the present invention ton help vinasse and carry out solid-liquid separation; Because the minimizing of clear liquid amount, the soluble solid concentration in the clear liquid increases, and is more conducive to evaporation concentration.By pipeline well heater is connected with flash tank, make the secondary steam of flash distillation provide thermal source for the clear liquid evaporation concentration by pipeline, the vacuum that while clear liquid concentration systems is produced passes to flash tank by this pipeline, for flash distillation provides vacuum, liquefaction process and clear liquid concentration technology is coupled.The secondary steam that liquefaction process produced can be saved a large amount of extraneous steam (clear liquid concentration technology of the present invention does not need the external world that steam is provided) as the thermal source of clear liquid concentration technology.Can carry out evaporation concentration to more clear liquid, help increasing the rate of recovery of the DDGS protein fodder of alcohol per ton; Utilize the vacuum apparatus of concentration technology, liquefied fermented glutinous rice is lowered the temperature, save a large amount of water coolants than traditional employing spiral plate cooling.
Description of drawings
Fig. 1 is an integrated artistic schematic flow sheet of the present invention.
Fig. 2 is liquefaction process of the present invention and clear liquid concentration technology coupled schematic flow sheet.
Embodiment
Corn alcohol of the present invention is produced liquefaction process and distiller's grains liquor concentration technology coupling technique, comprises after (1) takes off embryo with corn being ground into Semen Maydis powder; (2) steam ejection liquefaction after Semen Maydis powder being sized mixing, liquefying in advance gets liquefied fermented glutinous rice, and the temperature of steam ejection liquefaction is 105 ℃～135 ℃, and pressure is 0.1～0.15MPa; The temperature of steam ejection liquefaction is preferably 115 ℃～135 ℃; (3) liquefied fermented glutinous rice enters flash tank and carries out vacuum flashing, and the temperature of vacuum flashing is 80 ℃～85 ℃, and pressure is-0.02～-0.03MPa; (4) liquefied fermented glutinous rice after the vacuum flashing enter keep keep 1～3 hour under jar normal pressure after, entering the secondary flash tank again carries out getting the gelatinization wine with dregs after the secondary flash distillation, the temperature of secondary flash distillation is 80 ℃-85 ℃, pressure is-0.06～-0.07MPa, the vacuum pressure of twice vacuum flashing is provided by the vacuum pump of clear liquid evaporation concentration workshop section, and the temperature that twice vacuum flashing produced is that 80 ℃-85 ℃ secondary steam is as the thermal source of clear liquid evaporation concentration; (5) the gelatinization wine with dregs-0.06～-the workshop section's fermentation of going to ferment after being cooled to 60 ℃-65 ℃ under the vacuum of 0.07MPa, the vacuum pressure of vacuum cooling is provided by the vacuum pump by clear liquid evaporation concentration workshop section; (6) the fermented liquid distillation obtains finished product alcohol and wine lees liquor; (7) wine lees liquor obtains wet vinasse and clear liquid after the whizzer solid-liquid separation; (8) the separating obtained clear liquid of wine lees liquor enters well heater and carries out evaporation concentration, after separating, separator obtains concentrated solution and condensed water, obtain the DDGS feed after concentrated solution and the oven dry of wet vinasse drying machine, the condensed water recovery is used for Semen Maydis powder sizes mixing, and the thermal source of well heater is the secondary steam that twice vacuum flashing produced, the material vapour that dryer produces.The material vapour that dryer produced provides thermal source for the well heater of clear liquid concentration systems after hydro-thermal recovery system is converted into steam.
Can adopt the triple effect well heater that clear liquid is carried out evaporation concentration.When adopting the triple effect well heater, the separating obtained clear liquid of wine lees liquor pumps into an effect well heater through clear liquid pump and carries out evaporation concentration, effect concentrated solution after an effect separator separates enters an effect heater vaporizes through the part circulation and concentrates, and partly enters the triple effect heater vaporizes and concentrates; Triple effect concentrated solution after the triple effect separator separates partly circulates and enters the triple effect heater vaporizes and concentrate, and part enters two and imitates heater vaporizes and concentrate; Imitate the isolating two effect concentrated solution circulations of separator through two and enter two effect well heaters, underflow goes to get the DDGS feed after dryer and the common oven dry of wet vinasse; Each is imitated separator and separates condensed water that the back obtains and reclaim and be used for Semen Maydis powder and size mixing; One thermal source of imitating well heater is the secondary steam that steam ejection liquefaction vacuum flashing is produced, two thermals source of imitating well heater are an effect secondary steam that separator produced and the material vapour of dryer, and the thermal source of triple effect well heater is the secondary steam that the two effect secondary steams that separator produced, the flash distillation of liquefied fermented glutinous rice secondary produce.
Further specify the present invention below in conjunction with drawings and the specific embodiments and how to realize, but this should be interpreted as that the scope of the above-mentioned theme of the present invention only limits to following embodiment, allly all belong to scope of the present invention based on the technology that content of the present invention realized.
Embodiment
The corn alcohol of present embodiment is produced in liquefaction process and the distiller's grains liquor concentration technology coupling technique, well heater is connected by pipeline with flash tank, the secondary steam of flash distillation provides thermal source by pipeline for the clear liquid evaporation concentration, simultaneously vacuum pump is for after the clear liquid concentration systems provides vacuum, by this pipeline vacuum is passed to flash tank, for flash distillation provides vacuum.The coupling technique of present embodiment may further comprise the steps:
(1) be ground into Semen Maydis powder after corn is taken off embryo, the consumption of maize raw material is 12.7 tons/hour;
(2) steam ejection liquefaction after Semen Maydis powder being sized mixing, liquefying in advance gets liquefied fermented glutinous rice, and the temperature of steam ejection liquefaction is 115 ℃～135 ℃, and pressure is 0.1～0.15MPa; It is constant with the liquid level of stablizing in the pre-liquefied pot to regulate flow in the process of steam ejection liquefaction, and adds amylase continuously, and adding diastatic amount is 3.8Kg/ hour;
(3) liquefied fermented glutinous rice enters flash tank and carries out a vacuum flashing (be called for short one dodge), liquefied fermented glutinous rice behind the steam ejection liquefaction is carried out vacuum flashing, the temperature of vacuum flashing is 80 ℃～85 ℃, pressure is-0.02～-0.03MPa, the vacuum pressure of vacuum flashing is provided by the vacuum pump of clear liquid evaporation concentration workshop section, the temperature that vacuum flashing produced is that 80 ℃～85 ℃ secondary steam arrives clear liquid evaporation concentration workshop section through pipe-line transportation, imitates the thermal source of well heater as one of clear liquid evaporation concentration workshop section;
(4) liquefied fermented glutinous rice after the vacuum flashing enter keep keep 1～3 hour under jar normal pressure after, entering the secondary flash tank again carries out getting the gelatinization wine with dregs after the secondary flash distillation (being called for short two dodges), the temperature of secondary flash distillation is 80 ℃-85 ℃, pressure is-0.06～-0.07MPa, the vacuum pressure of vacuum flashing is provided by the vacuum pump of clear liquid evaporation concentration workshop section, the temperature that vacuum flashing produced is that 80 ℃-85 ℃ secondary steam arrives clear liquid evaporation concentration workshop section through pipe-line transportation, as the thermal source of triple effect well heater;
(5) the gelatinization wine with dregs-0.06～-the workshop section's fermentation of going to ferment after the breaking of vacuum temperature to 60 of 0.07MPa ℃-65 ℃, the vacuum pressure of vacuum cooling is provided by the vacuum pump by clear liquid evaporation concentration workshop section;
These 60 ℃-65 ℃ gelatinization wine with dregs pumpings further are cooled to 28 ℃ through spiral-plate heat exchanger enter fermentor tank, added saccharifying enzyme 19.0Kg/ hour continuously simultaneously;
(6) the inoculation yeast bacterium was fermented after the gelatinization wine with dregs entered fermentor tank, obtained finished product alcohol and wine lees liquor after the fermented liquid distillation;
(7) wine lees liquor obtains wet vinasse and clear liquid after the whizzer solid-liquid separation;
(8) the separating obtained clear liquid of wine lees liquor enters the triple effect well heater and carries out vacuum-evaporation and concentrate, the separating obtained clear liquid of wine lees liquor pumps into an effect well heater through clear liquid pump and carries out evaporation concentration, effect concentrated solution after an effect separator (being called for short a fen) separates is behind recycle pump, the part circulation enters an effect heater vaporizes and concentrates, and part enters the triple effect heater vaporizes and concentrates; Triple effect concentrated solution after triple effect separator (being called for short three fens) separation is behind recycle pump, and the part circulation enters the triple effect heater vaporizes and concentrates, and part enters two effect heater vaporizes and concentrates; Behind recycle pump, circulation enters two and imitates well heaters through the isolating two effect concentrated solutions of two effect separators (being called for short two fens), and underflow gets the DDGS feed after going pipe bundle type dryer and wet vinasse to dry jointly; Each is imitated separator and separates condensed water that the back obtains and reclaim and be used for Semen Maydis powder and size mixing; One thermal source of imitating well heater is the secondary steam that steam ejection liquefaction vacuum flashing is produced, two thermals source of imitating well heater are an effect secondary steam that separator produced and the material vapour of dryer, and the thermal source of triple effect well heater is the secondary steam that the two effect secondary steams that separator produced, the flash distillation of liquefied fermented glutinous rice secondary produce.
Present embodiment adopts above-mentioned technology, produces 100 tons of edible ethanols daily, about day recovery DDGS85 ton, and 6.5 tons of ton Ebullioscope consumption steam, Ebullioscope per ton is saved 0.5 ton of steam.
Claims (3)
1, a kind of corn alcohol is produced liquefaction process and distiller's grains liquor concentration technology coupling technique, may further comprise the steps:
(1) after being taken off embryo, corn is ground into Semen Maydis powder;
(2) steam ejection liquefaction after Semen Maydis powder being sized mixing, liquefying in advance gets liquefied fermented glutinous rice, and the temperature of steam ejection liquefaction is 105 ℃～135 ℃, and pressure is 0.1～0.15MPa; The temperature of steam ejection liquefaction is preferably 115 ℃～135 ℃;
(3) liquefied fermented glutinous rice enters flash tank and carries out vacuum flashing, the temperature of vacuum flashing is 80 ℃～85 ℃, pressure is-0.02～-0.03MPa, the vacuum pressure of vacuum flashing is provided by the vacuum pump of clear liquid evaporation concentration workshop section, and the temperature that vacuum flashing produced is that 80 ℃～85 ℃ secondary steam is as the thermal source of clear liquid evaporation concentration;
(4) liquefied fermented glutinous rice after the vacuum flashing enter keep keep 1～3 hour under jar normal pressure after, entering the secondary flash tank again carries out getting the gelatinization wine with dregs after the secondary flash distillation, the temperature of secondary flash distillation is 80 ℃-85 ℃, pressure is-0.06～-0.07MPa, the vacuum pressure of vacuum flashing is provided by the vacuum pump of clear liquid evaporation concentration workshop section, and the temperature that vacuum flashing produced is that 80 ℃-85 ℃ secondary steam is as the thermal source of clear liquid evaporation concentration;
(5) the gelatinization wine with dregs-0.06～-the workshop section's fermentation of going to ferment after being cooled to 60 ℃-65 ℃ under the vacuum of 0.07MPa, the vacuum pressure of vacuum cooling is provided by the vacuum pump by clear liquid evaporation concentration workshop section;
(6) the fermented liquid distillation obtains finished product alcohol and wine lees liquor;
(7) wine lees liquor obtains wet vinasse and clear liquid after the whizzer solid-liquid separation;
(8) the separating obtained clear liquid of wine lees liquor enters well heater and carries out evaporation concentration, after separating, separator obtains concentrated solution and condensed water, obtain the DDGS feed after concentrated solution and the oven dry of wet vinasse drying machine, the condensed water recovery is used for Semen Maydis powder sizes mixing, and the thermal source of well heater is the secondary steam that twice vacuum flashing produced, the material vapour that dryer produces.
2, corn alcohol according to claim 1 is produced liquefaction process and distiller's grains liquor concentration technology coupling technique, it is characterized in that:
Well heater is the triple effect well heater described in the step (8), the separating obtained clear liquid of wine lees liquor enters an effect well heater and carries out evaporation concentration, effect concentrated solution after an effect separator separates enters an effect heater vaporizes through the part circulation and concentrates, and partly enters the triple effect heater vaporizes and concentrates; Triple effect concentrated solution after the triple effect separator separates partly circulates and enters the triple effect heater vaporizes and concentrate, and part enters two and imitates heater vaporizes and concentrate; Imitate the isolating two effect concentrated solution circulations of separator through two and enter two effect well heaters, underflow goes to get the DDGS feed after dryer and the common oven dry of wet vinasse; Each is imitated separator and separates condensed water that the back obtains and reclaim and be used for Semen Maydis powder and size mixing; One thermal source of imitating well heater is the secondary steam that steam ejection liquefaction vacuum flashing is produced, two thermals source of imitating well heater are an effect secondary steam that separator produced and the material vapour of dryer, and the thermal source of triple effect well heater is the secondary steam that the two effect secondary steams that separator produced, the flash distillation of liquefied fermented glutinous rice secondary produce.
3, corn alcohol according to claim 1 and 2 is produced liquefaction process and distiller's grains liquor concentration technology coupling technique, and it is characterized in that: the temperature of described steam ejection liquefaction is 105 ℃-135 ℃.
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| CN102373239A (en) * | 2010-08-12 | 2012-03-14 | 中粮生物化学（安徽）股份有限公司 | Preparation method for ethanol |
| CN102373254A (en) * | 2010-08-12 | 2012-03-14 | 中粮生物化学（安徽）股份有限公司 | Enzymolysis method of starchy material and preparation method of citric acid |
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| CN1219067C (en) * | 2001-08-31 | 2005-09-14 | 徐昌洪 | Continuous fermenting alcohol producing process with membrane coupled clear liquor in single tank |
| CN1435487A (en) * | 2002-01-28 | 2003-08-13 | 金丰秋 | Technique for industrially producing novel alcohol (fael-contg. alcohol) |
| CN1590553A (en) * | 2003-09-03 | 2005-03-09 | 郑州凯乐生物能有限公司 | Alcohol cleaning production technology using wheat as raw material |
| CN1298859C (en) * | 2004-12-29 | 2007-02-07 | 天津大学 | Production of alcohol fuel |
| CN101319232B (en) * | 2008-04-15 | 2012-01-11 | 山东博润实业有限公司 | Method for preparing ethyl alcohol with corn fermentation |
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| CN102373254A (en) * | 2010-08-12 | 2012-03-14 | 中粮生物化学（安徽）股份有限公司 | Enzymolysis method of starchy material and preparation method of citric acid |
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