CN101613721A

CN101613721A - Method for producing ethanol gasoline and ethanol diesel oil with denatured fuel ethanol made from straw

Info

Publication number: CN101613721A
Application number: CN200810050863A
Authority: CN
Inventors: 王莘
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-06-23
Filing date: 2008-06-23
Publication date: 2009-12-30

Abstract

The production method of method for producing ethanol gasoline and ethanol diesel oil with denatured fuel ethanol made from straw, belong to denatured fuel ethanol manufacturing technology field, its production technique is, the various raw materials of pulverizing are mixed by weight, be soaked in water 7 days, pulled again poach out 30 minutes, cool off 34 ℃ again and add distiller's yeast, the wine enzyme, the input that stirs fermentor tank, fermented 5-6 days, dropping into retort again distills, getting between 78 ℃-80 ℃ distillate can make 60% ethanol liquid and continue rectifying again and can get 95% (volume ratio) ethanol liquid, utilize the molecular sieve dehydration method can make 99.8% (volume ratio) ethanol to former 95% (volume ratio) ethanol liquid, add a certain amount of denaturing agent again, can form a kind of denatured fuel ethanol, in gasoline, add a certain amount of denatured fuel ethanol and form a kind of ethanol petrol, in diesel oil, add a certain amount of denatured fuel ethanol and can form a kind of ethanol diesel fuel.

Description

Method for producing ethanol gasoline and ethanol diesel oil with denatured fuel ethanol made from straw

Technical field:

The invention belongs to stalk and produce denatured fuel ethanol, make ethanol petrol, the ethanol diesel fuel technical field, be stalk, corn cob, the corn dregs of fat with farm crop be mixed into raw material production denatured fuel ethanol again with gasoline, diesel oil is mixed and makes ethanol petrol respectively, the production method of ethanol diesel fuel.

Background technology:

Produce alcohol fuel at present at home and abroad, major part is all made raw material with grain, and the production cost height is wasted grain again.Be restricted so develop production.

Summary of the invention:

It is raw material production denatured fuel ethanol that the technical problem to be solved in the present invention discloses a kind of stalk with farm crop, corn cob, the corn dregs of fat, make ethanol petrol, ethanol diesel fuel, promptly save food, reduce production costs again, reduce environmental pollution in process of production again.

The scheme of the technical problem to be solved in the present invention is finished by following step:

1, selects materials

Select then maize straw, corn cob, sorgo stalk, the corn dregs of fat for use.

2, powder

Maize straw, sorgo stalk are ground into 1-2 centimetre of segment, corn cob, Semen Maydis oil ground-slag are broken into 20 orders.

3, raw material mixed weight ratio is:

Maize straw 15

Sorgo stalk 70

Corn cob meal 15

Corn pulp-water 80 (byproduct in Semen Maydis oil workshop, the Semen Maydis grit behind the corn extraction plumule adds soak water of maize and makes corn steep liquor).

Distiller's yeast liquid 8 (pressing raw material weight 8%)

Wine enzyme liquid 4 (pressing raw material weight 4%)

4, hydrolysis

Maize straw, sorgo stalk, three kinds of raw materials of corn cob are mixed by weight and stir, add the corn pulp-water of making and soaked 7 days.

5, boiling

The raw material of hydrolysis is dropped into steam cooker, hot digestion 30 minutes, 110 ℃-120 ℃ of temperature, and then material water is pulled and boiled to a material that has boiled out, hydrolysis water all mixes and stirs, and cools off and reduce by 35 ℃, adds distiller's yeast again, the wine enzyme stirs.

6, fermentation

The material of mixing is dropped into solid-state fermenter, carry out about 28 ℃ of leavening temperatures, fermented 5-6 days.

7, distillation

The distiller's wort that has fermented is dropped into retort add thermal distillation, collect the distillate between 77 ℃-85 ℃, can make 50%-60% ethanol liquid, proceed rectifying, can make 95% alcohol liquid.

8, the corn dregs of fat are produced alcohol

Corn dregs of fat raw material can not mix with stalk makes raw material, will extract ethanol separately to Semen Maydis grit.

The raw material consumption:

500 kilograms of the maize germ dregs of fat (producing the byproduct of corn)

45 kilograms of fast bent liquid

95 kilograms of distiller's yeasts

85 kilograms on rice husk

Operating process

Boiling is pressed raw material weight than with broken 20 orders of Fructus Maydis oil ground-slag, mixes with rice husk, drops in the steam cooker, and hot digestion is after 30 minutes, and it is identical that other alcohol, distillation, dehydration, purification are all produced 95% alcohol method by above stalk.

9, dehydration, purification

The alcohol of producing 95% is utilized the molecular sieve dehydration method, be to utilize the zeolite in the common ethanol of absorption to be molecular sieve, molecular sieve is packed in the tower, when 95% (volume) ethanol (vapour phase or liquid phase) absorbed 3/4 is water, the 1/4th during by this tower, ethanol, after this molecular sieve tower absorption is saturated, change in another new tower, with saturator regeneration, reclaim a kind of dewatering of the Diluted Alcohol of discharging simultaneously.

10, denatured fuel alcoholic acid preparation

Raw spirit is added a kind of denatured fuel ethanol of the feasible one-tenth of an amount of denaturing agent (white gasoline).Carry out national standard, should meet the requirement of GB17930-1999 " unleaded gasoline for vehicle ", but must not add oxygenatedchemicals.The denaturing agent addition, alcohol fuel and denaturing agent (volume) mixed ratio is 100: 2-100: 5 is that the volumn concentration of denaturing agent in denatured fuel is 1.96% (V/V)-4.76% (V/V), should add effective metal corrosion inhibitor, to satisfy the requirement of vehicle-use alcohol gasoline copper corrosion.

11, the preparation of ethanol petrol

Ethanol petrol is meant in the special-purpose gasoline component oil of oxygen-free compound, adds the denatured fuel ethanol of certain proportion (China fixes tentatively 10% at present) by volume, carries out the quality standard requirement of national standard C B18351-2004.

Vehicle-use alcohol gasoline is divided into four trades mark No. 90, No. 93, No. 95, No. 97 by research octane number (RON), sign: No. 90, E10 ethanol petrol, No. 93, E10 ethanol petrol, No. 95, E10 ethanol petrol, No. 97, E10 ethanol petrol.

12, the preparation of ethanol diesel fuel

The denatured fuel ethanol of adding 10% in diesel oil, diesel engine do not need to change and adjust and the normal diesel oil indifference that uses.

Embodiment:

Various raw materials are mixed by weight stir, soaked 7 days with clear water, pulled poach again out 30 minutes, the material that will boil is pulled out and is cooled 34 ℃ again, add 8% of distiller's yeast liquid raw material weight, stir with 3% of wine enzyme liquid raw material weight, dropped into again ferment tank 5-6 days, the distiller's wort that will ferment distills again, get the distillate between 78 ℃-80 ℃, wine liquid can obtain the ethanol liquid of content 50%-60%, continue rectifying, can make 95% (V/V) (volume) ethanol liquid, and then utilize the sub-sieve evaporation to dewater to 95% ethanol liquid, purify, when 95% (volume) ethanol (vapour phase or liquid phase) is water by this tower absorbed 3/4, the 1/4th, ethanol is worked as molecular sieve tower absorption and is changed another new tower over to after saturated, simultaneously saturator is regenerated, reclaiming the Diluted Alcohol of discharging is dehydrated alcohol, again dehydrated alcohol is added 2% denaturing agent, can make denatured fuel ethanol, by national regulation gasoline is added a certain amount of denatured fuel ethanol and form a kind of ethanol petrol, denatured fuel ethanol forms a kind of ethanol diesel fuel by a certain amount of the mixing with diesel oil.

Claims

1, the production method of method for producing ethanol gasoline and ethanol diesel oil with denatured fuel ethanol made from straw is characterized in that its adopts maize straw, sorgo stalk, rice husk, the corn dregs of fat, corn cob to make, and is finished by step down:

(1) selects materials: select for use then fresh corn stalk, sorgo stalk, corn cob, rice husk, the corn dregs of fat as raw material.

(2) weight fraction of various raw materials ratio is:

Maize straw 15

Sorgo stalk 70

Corn cob 15

(3) pulverize: maize straw, sorgo stalk are ground into 1-2 centimetre, and corn cob meal is broken into 20 orders, and Semen Maydis grit is ground into 40 orders.Rice husk is not pulverized.

(4) hydrolysis: the raw material of pulverizing is mixed by mixing ratio, stir, with corn soaking water logging raw material, amount of water is controlled at raw material total amount 50%-60%, adds concentrated nitric acid soaking water earlier before not adding water, transfers to pH value and reaches till 7.Then with the immersion water logging material that modulates.

(5) thermal treatment: the coarse fodder input of hydrolysis is compressed in the molten device of steam, heat 110 ℃, kept 30 minutes, separate cooling again, lower the temperature till 28 ℃-30 ℃.

(6) with the wine enzyme, add distiller's yeast: with wine enzyme liquid measure is major ingredient 3%, adds the distiller's yeast liquid measure and be major ingredient 5%-8% before not adding yeast, and yeast is mixed into thin pulp with 30 ℃ of warm water, adds in the pan feeding again.

(7) fermentation: 15 ℃-20 ℃ of the temperature of fermentation vat.Prevent air and extraneous assorted bacterium immersion, so step on unstrained spirits, the fermentation vat of obturaging then, fermentation time 6-7 days.

(8) distillation: the wine unstrained spirits of fermentation is dropped in the retort, distill, will get a breathing space back atmosphere during distillation earlier.The wine flow rate control is in the 2-3 kg/min, temperature is the highest not to surpass 78 ℃-80 ℃, can make the ethanol liquid of content 50%-60% degree, continues rectifying again and can obtain 70%-80% ethanol, the ethanol liquid of content 80% is dropped into the rectifying tower cut, can make the ethanol (volume ratio) of content 95%.

(9) dehydration: the ethanol (volume ratio) to former content 95% utilizes the molecular sieve dehydration method can make 99.5%-99.8% (volume ratio) ethanol.The ethanol of former content 99.5% (volume ratio) is pressed national regulation add a kind of denatured fuel ethanol of denaturing agent 2% (white gasoline) formation.It can be mixed denatured fuel ethanol in ratio and gasoline, the diesel oil of national regulation, forms a kind of ethanol petrol, ethanol diesel fuel.