CN110305708A - A kind of agricultural crop straw exotic fuels preparation process - Google Patents
A kind of agricultural crop straw exotic fuels preparation process Download PDFInfo
- Publication number
- CN110305708A CN110305708A CN201910668354.6A CN201910668354A CN110305708A CN 110305708 A CN110305708 A CN 110305708A CN 201910668354 A CN201910668354 A CN 201910668354A CN 110305708 A CN110305708 A CN 110305708A
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- CN
- China
- Prior art keywords
- stalk
- agricultural crop
- crop straw
- preparation process
- lignin
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/445—Agricultural waste, e.g. corn crops, grass clippings, nut shells or oil pressing residues
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/447—Carbonized vegetable substances, e.g. charcoal, or produced by hydrothermal carbonization of biomass
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Agronomy & Crop Science (AREA)
- Sustainable Development (AREA)
- Processing Of Solid Wastes (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The present invention provides a kind of agricultural crop straw exotic fuels preparation process.China is large agricultural country, and stalk quantity is big, wide in variety, distribution is wide, is not comprehensively utilized effectively, causes that environmental pollution is serious, and especially major grain producing area, this phenomenon are particularly acute.The present invention realizes the high-valued comprehensive utilization in the nearly field of agricultural crop straw, cellulose in stalk is separated first, for preparing cellulosic ethanol, partial carbonization processing is carried out to remaining hemicellulose, lignin in stalk after separation, high heating value biomass fuel is prepared, biomass electric power plant fuel used to generate electricity is used for, treated stalk calorific value and standard coal calorific value are essentially identical, calorific value reaches 4200~4500kcal/kg, gets rid of for biomass electric power plant and provides possibility by the viable situation of public subsidies.It is that the current biomass electric power plant that solves is generated electricity using stalk direct combustion, raw material stores up the preferable outlet for the problems such as difficult, the thermal efficiency is low, product is single.
Description
Technical field
The present invention relates to a kind of agricultural crop straw exotic fuels preparation processes, belong to biomass field of new energy technologies.
Background technique
Agricultural crop straw is as a kind of important biomass energy, containing 40% carbon amounts, energy resource density is 14.0~
17.6MJ/kg, that is to say, that 2t stalk thermal energy value can replace 1t standard coal, and stalk average sulfur content 0.38% is far below coal
1%.But the collection of Biomass Energy Resources, transport, processing and storage still face certain difficulty, the fuel of biomass power generation
Cost structure is more complicated than conventional electric power generation.It is different from traditional fuel, purchase of the biomass power generation fuel cost in addition to raw materials such as stalks
Outside buy sheet, processing cost, storage and transportation expense and loss account for fuel cost larger specific gravity.In general, most of China
Biomass generation is still in the junior stage, and lacks own intellectual property, Biomass Energy Technology in core technology field
Industrialization with commercialization transforming degree it is low, lack the power of sustainable development.
The biomass power plant (steam power plant) of one 25 megawatts of construction, can consume more than 30 ten thousand tons of agricultural crop straw every year, press
300 yuan/procurement price per ton calculates, and can form 90,000,000 yuan of biomass purchase market every year.Straw power generation enterprise is upper at present
Net electricity price is every 0.75 yuan of degree, generates a kilowatt calculating by 1.3-1.6 kilograms of stalk, recycles the cost of stalk just already close to online
Electricity price.Under the influence of the subsidy of national new energy is persistently fallen off, biomass power generation Business survival is more and more difficult.It is 2018, raw
Newly-increased 3,050,000 kilowatts of the installation of substance power generation, accumulative installation reaches 17,810,000 kilowatts, increases by 20.7% on a year-on-year basis；Annual biomass fermentation
90,600,000,000 kilowatt hour of electricity, increases by 14% on a year-on-year basis, continues to keep the steady-state growth impetus.Therefore a kind of agricultural crop straw of the present invention is high
Combustion value fuel preparation process, has a bright future.
Summary of the invention
Biomass straw power plant common at present all generates electricity using stalk direct combustion, and the thermal efficiency is lower, raw material stalk application
It is single, to overcome the above difficulties, this present invention provides a kind of agricultural crop straw exotic fuels preparation process.China is as agriculture
State, sparetime university, stalk quantity is big, wide in variety, distribution is wide, is not comprehensively utilized reasonably, utilization rate is low, conversion ratio is low, economical
Benefit is low, environmental pollution is serious, especially major grain producing area, and this phenomenon is particularly acute.The present invention is by the nearly field of agricultural crop straw
High-valued comprehensive utilization, first cellulose in separation stalk are realized, for preparing cellulosic ethanol, to remaining in stalk after separation
Hemicellulose, lignin carry out partial carbonization processing, prepare high heating value biomass fuel, be used for biomass electric power plant fuel used to generate electricity,
Treated stalk calorific value and standard coal calorific value are essentially identical, considerably beyond existing stalk calorific value, stalk calorific value reaches 4200~
4500kcal/kg gets rid of for biomass electric power plant and provides possibility by the viable situation of public subsidies.It is to solve at present
Biomass electric power plant is generated electricity using stalk direct combustion, and raw material stores up the preferable outlet for the problems such as difficult, the thermal efficiency is low, product is single.Creation
Using stalk as the industry of the novel ecological of raw material, carries out farm and sideline product processing industry, the production model that biomass energy industry combines, give
Peasant brings considerable income, realizes local farmers and precisely shakes off poverty.
The technical solution adopted by the present invention is summarized as follows:
A kind of agricultural crop straw exotic fuels preparation process, it is characterised in that agricultural crop straw is located in advance by weak acid gas explosion
After reason, cellulose in stalk is isolated, is used to prepare cellulosic ethanol, hemicellulose and lignin in remaining stalk, tentatively
After drying, partial carbonization processing is carried out, exotic fuels are prepared, is used for biomass electric power plant fuel used to generate electricity.Step includes stalk
Pretreatment, cellulose separation and three hemicellulose, lignin partial carbonization steps, specifically: it is characterized in that the weak acid
Gas explosion pre-treatment step, using beater grinder to stalk pulverization process, after crushing stalk after weak acid spray is sized mixing,
Into supercritical carbon dioxide charging kettle, pressurization gas explosion processing.The partial carbonization processing step, to the hemicellulose isolated
With lignin at a temperature of 100-200 DEG C fast dewatering, after preliminarily dried, 18-25 DEG C or so of heating is rapidly heated per minute, controls
350-400 DEG C of temperature processed is heated hemicellulose and lignin partial carbonization.
Process flow are as follows:
Fuel lignin finished product ← partial carbonization processing ← drying ← separation hemicellulose, lignin stalk → electromagnetism except iron →
Pulverization process → weak acid is quenched → gas explosion processing → hydrolyzable cellulose → filtering → hydrolysis → cellulosic ethanol
Stalk exotic fuels quality standard:
The present invention provides a kind of agricultural crop straw exotic fuels preparation process, is characterized in that step includes that stalk is pre-
Processing, cellulose separation and three hemicellulose, lignin partial carbonization steps:
(1) stalk pre-processes: it is characterized in that the weak acid gas explosion pre-treatment step, utilizes beater grinder pair
Stalk pulverization process cuts the segment of 1-4cm, and after weak acid spray is sized mixing, pH value is controlled in 5- stalk after crushing
Between 6.5, into supercritical carbon dioxide gas explosion charging kettle, it is pressurized to 6-15MPa, 45-65 DEG C of gas explosion processing of temperature.Pre-process skill
Art separates wood instead of other biological chemistry etc. (such as fermentation, carbohydrase enzyme) method using the broken method of pure physics high pressure gas explosion
Cellulose and hemicellulose in matter object.Process flow is shortened, operation sequence is simplified, has prevented secondary pollution.
(2) cellulose separates: by the straw pulp after gas explosion, utilizing vane type horizontal filter filtration treatment, filter residue water
It washes, is washed till neutrality, be used to prepare cellulosic ethanol.
(3) hemicellulose, lignin partial carbonization: it is characterized in that the partial carbonization processing step, to half isolated
Cellulose and lignin fast dewatering at a temperature of 100-200 DEG C, after preliminarily dried, 18-25 DEG C or so of heating per minute is quickly
Heating, 350-400 DEG C of control temperature heat hemicellulose and lignin partial carbonization.
Specific embodiment
The present invention is further illustrated combined with specific embodiments below.Obviously, described embodiment is only this
A part of the embodiment of invention, rather than whole embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Embodiment 1
The present embodiment includes the following steps: a kind of agricultural crop straw exotic fuels preparation process
(1) stalk pre-processes: it is characterized in that the weak acid gas explosion pre-treatment step, utilizes beater grinder pair
Stalk pulverization process cuts the segment of 2cm, after crushing stalk after weak acid spray is sized mixing, pH value control 5.5,
Into supercritical carbon dioxide gas explosion charging kettle, it is pressurized to 12MPa, 55 DEG C of gas explosions processing of temperature.
(2) cellulose separates: by the straw pulp after gas explosion, utilizing vane type horizontal filter filtration treatment, filter residue water
It washes, is washed till neutrality, be used to prepare cellulosic ethanol.
(3) hemicellulose, lignin partial carbonization: it is characterized in that the partial carbonization processing step, to half isolated
Cellulose and lignin fast dewatering at a temperature of 150 DEG C, after preliminarily dried, 20 DEG C or so of heating is rapidly heated per minute, controls
380 DEG C of temperature processed are heated hemicellulose and lignin partial carbonization.
Embodiment 2
The present embodiment includes the following steps: a kind of agricultural crop straw exotic fuels preparation process
(1) stalk pre-processes: it is characterized in that the weak acid gas explosion pre-treatment step, utilizes beater grinder pair
Stalk pulverization process cuts the segment of 1cm, after crushing stalk after weak acid spray is sized mixing, pH value control 5.7,
Into supercritical carbon dioxide gas explosion charging kettle, it is pressurized to 10MPa, 52 DEG C of gas explosions processing of temperature.
(2) cellulose separates: by the straw pulp after gas explosion, utilizing vane type horizontal filter filtration treatment, filter residue water
It washes, is washed till neutrality, be used to prepare cellulosic ethanol.
(3) hemicellulose, lignin partial carbonization: it is characterized in that the partial carbonization processing step, to half isolated
Cellulose and lignin fast dewatering at a temperature of 180 DEG C, after preliminarily dried, 23 DEG C or so of heating is rapidly heated per minute, controls
395 DEG C of temperature processed are heated hemicellulose and lignin partial carbonization.
Claims (3)
1. a kind of agricultural crop straw exotic fuels preparation process, it is characterised in that agricultural crop straw is pre-processed by weak acid gas explosion
Afterwards, cellulose in stalk is isolated, is used to prepare cellulosic ethanol, hemicellulose and lignin in remaining stalk are preliminary dry
After dry, partial carbonization processing is carried out, exotic fuels are prepared, is used for biomass electric power plant fuel used to generate electricity.
2. a kind of agricultural crop straw exotic fuels preparation process described in accordance with the claim 1, it is characterised in that described is weak
The quick-fried pre-treatment step of acid gas cuts the segment of 1-4cm, straw after crushing using beater grinder to stalk pulverization process
After weak acid spray is sized mixing, pH value controls between 5-6.5 stalk, into supercritical carbon dioxide gas explosion charging kettle, is pressurized to 6-
15MPa, 45-65 DEG C of gas explosion processing of temperature.
3. a kind of agricultural crop straw exotic fuels preparation process described in accordance with the claim 1, it is characterised in that described half
Carbonization treatment step, to the hemicellulose and lignin isolated at a temperature of 100-200 DEG C fast dewatering, after preliminarily dried,
Per minute heating 18-25 DEG C or so be rapidly heated, control 350-400 DEG C of temperature to hemicellulose and lignin partial carbonization heating at
Reason.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910668354.6A CN110305708A (en) | 2019-07-23 | 2019-07-23 | A kind of agricultural crop straw exotic fuels preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910668354.6A CN110305708A (en) | 2019-07-23 | 2019-07-23 | A kind of agricultural crop straw exotic fuels preparation process |
Publications (1)
| Publication Number | Publication Date |
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| CN110305708A true CN110305708A (en) | 2019-10-08 |
Family
ID=68080645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910668354.6A Pending CN110305708A (en) | 2019-07-23 | 2019-07-23 | A kind of agricultural crop straw exotic fuels preparation process |
Country Status (1)
| Country | Link |
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| CN (1) | CN110305708A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104404803A (en) * | 2014-08-29 | 2015-03-11 | 济南米铎碳新能源科技有限公司 | Straw component separation and straw component full utilization method |
| CN106939170A (en) * | 2017-02-20 | 2017-07-11 | 华南农业大学 | A kind of solar energy collaboration two-step method biomass screw bakees preprocess method and device |
-
2019
- 2019-07-23 CN CN201910668354.6A patent/CN110305708A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104404803A (en) * | 2014-08-29 | 2015-03-11 | 济南米铎碳新能源科技有限公司 | Straw component separation and straw component full utilization method |
| CN106939170A (en) * | 2017-02-20 | 2017-07-11 | 华南农业大学 | A kind of solar energy collaboration two-step method biomass screw bakees preprocess method and device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191008 |
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| RJ01 | Rejection of invention patent application after publication |