CN105969470A - Lightweight carbon fiber biomass briquette fuel and production method thereof - Google Patents

Lightweight carbon fiber biomass briquette fuel and production method thereof Download PDF

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Publication number
CN105969470A
CN105969470A CN201610090423.6A CN201610090423A CN105969470A CN 105969470 A CN105969470 A CN 105969470A CN 201610090423 A CN201610090423 A CN 201610090423A CN 105969470 A CN105969470 A CN 105969470A
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Prior art keywords
carbon fiber
hour
dried
fuel
briquette fuel
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CN201610090423.6A
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Chinese (zh)
Inventor
郑跃辉
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ANHUI DONGFANGJINHE PRECISION MACHINERY MANUFACTURING Co Ltd
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ANHUI DONGFANGJINHE PRECISION MACHINERY MANUFACTURING Co Ltd
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Priority to CN201610090423.6A priority Critical patent/CN105969470A/en
Publication of CN105969470A publication Critical patent/CN105969470A/en
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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
    • C10L9/00—Treating solid fuels to improve their combustion
    • C10L9/10—Treating solid fuels to improve their combustion by using additives
    • 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
    • C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
    • C10L2230/06—Firelighters or wicks, as additive to a solid fuel
    • 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
    • C10L2230/00—Function and purpose of a components of a fuel or the composition as a whole
    • C10L2230/22—Function and purpose of a components of a fuel or the composition as a whole for improving fuel economy or fuel efficiency
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/08—Drying or removing water
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/24—Mixing, stirring of fuel components
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/26—Composting, fermenting or anaerobic digestion fuel components or materials from which fuels are prepared
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/30—Pressing, compressing or compacting
    • 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
    • C10L2290/00—Fuel preparation or upgrading, processes or apparatus therefore, comprising specific process steps or apparatus units
    • C10L2290/32—Molding or moulds
    • 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

Abstract

The invention discloses a lightweight carbon fiber biomass briquette fuel. According to the invention, the pretreated corn straws are taken as a raw material for anaerobic fermentation for 10-20 days, so that mechanical endurance of the briquette fuel is increased, finally, biogas residue is dried and crushed, and then is composited with an anti-slagging agent and an oxidant and other active ingredients for compression moulding under condition of 6MPa. The preparation method has the advantages of fast moulding and less required pressure, and is helpful for reducing equipment wearing. In the invention, magnesium carbonate is taken as the anti-slagging agent, during a combustion process, the Mg element and elements such as Si, K, and Na which are inherent in the corn straws and are capable of slagging are subjected to a reaction, a novel compound K2Mg(SO4)2 is generated and provides anti-slagging performance to the briquette fuel, industrial alcohol which is taken as an ignition-assisting agent is capable of increasing the combustion efficiency and heat energy of the fuel, the produced briquette fuel has the advantages of light weight and full combustion, the combusted products are rich in various elements, can be used for producing the agricultural fertilizers, and enable cyclic utilization without environmental pollution.

Description

A kind of lightweight carbon fiber biological matter shaped fuel and preparation method thereof
Technical field
The present invention relates to biomass fuel technical field, particularly relate to a kind of lightweight carbon fiber biological matter shaped fuel and Manufacture method.
Background technology
Biomass energy because it is renewable, aboundresources, environmental friendliness and become world's fourth largest energy, be also the most permissible Transport and the clean reproducible energy stored, mainly by the biomass energy technology modernized by agricultural wastes, felling Residue, feces of livestock and poultry, MSW, sanitary sewage become biological particles to fire with Raw material processings such as industrial organic waste waters The end products such as material, biodiesel, bio-fuel ethanol.Biomass fuel is discharged almost without SO2 during later-stage utilization, Decrease the acid rain caused by flue gas and the harm of greenhouse effect produced during it utilizes so that biomass energy has The most wide application prospect and development space, thus Developing Biomass fuel has become the mankind and has solved energy problem and improve ring One important means in border and developing direction.China is large agricultural country, and biomass resource enriches, the yield of annual agricultural crop straw More than 700,000,000 t, wherein amount usable is about 5.055 hundred million t, accounts for the 50%-60% of Chinese biological matter total resources, therefore, converts it Utilize significant.The raw materials such as agricultural crop straw exist loosely organized, density is little, distribution is not concentrated, the thermal efficiency is low, inconvenient Many defects such as transport and storage, are unfavorable for utilizing on a large scale, utilize mechanical force that compressed biomass or extruding are become density relatively Greatly, the thermal efficiency is high, it is simple to the solid fuel of transport storage is the most relatively advanced a kind of biomass economy mode.
It is tight to there is equipment attrition for straw compressing and forming in " molding fuel test is prepared in stalk anaerobic fermentation modification " literary composition The antibiont degraded barrier that weight and anaerobic fermentation face, it is proposed that the thinking of shaped fuel is prepared in a kind of stalk anaerobic fermentation modification And carried out experimental study.With corn straw as raw material in literary composition, the anaerobism that raw material carries out 10d and 20 d respectively by a definite date is sent out Ferment, the biogas residue after fermentation size-reduced and dried in 100 DEG C, be compressed into the granular fuel of diameter 10 mm under the conditions of 6 MPa. Result of the test shows: after stalk anaerobic fermentation, and the energy being retained in biogas residue is more than the energy transferred in biogas, straw biogas residue Energy value high, but after fermentation 20 d, straw content of ashes is 3 times of non-fermented stalk, and its clinkering property may be made to increase By force, the shaped fuel calorific value and prepared in literary composition only improves about 5.82% than raw material, it is impossible to meets blast furnace or has high heating value demand Place, and exist when small-sized cooking stove misfire, the problem such as the length duration of ignition and smoke pollution, efficiency of combustion is low, Need in addition modified to obtain high heating value, the novel biomass shaped fuel of resistive connection slag.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of lightweight carbon fiber biological matter shaped fuel And preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of lightweight carbon fiber biological matter shaped fuel, is prepared by the raw materials in: corn straw 100, dried small shrimps powder 12- 14, rice straw 18-20, magnesium carbonate 4-6, ferrum oxide 5-7, carbon fiber 3-5, industrial alcohol 6-8, Linesless charcoal 2.3-2.6, Nacl 1-3, albarium 1-2, kyanite 17-19, suitable quantity of water.
The manufacture method of described a kind of lightweight carbon fiber biological matter shaped fuel, comprises the following steps:
(1) Linesless charcoal is put in industrial alcohol and soak 10-12 hour, take out evacuation and be dried and pulverize, addition albarium, Carbon fiber mixes, and is warming up to 80-90 DEG C of ultrasonic grinding 10-15 minute, is dried and prepares combustion adjuvant；
(2) kyanite 5-10wt% hydrochloric acid solution is soaked 1-2 hour, with hot wash to without chloride ion, add water in 80-100 Ultrasonic grinding 8-10 minute at DEG C, dries, and adds ferrum oxide roasting 2-4 hour at 680-760 DEG C, is cooled to grinding at room temperature Prepare modified aquamaine stone powder；
(3) by corn straw, rice straw with hot-water soak 10-12 hour of 60-70 DEG C, filter and put in fermentation vat, control Fermentation vat temperature is at 30-50 DEG C, and humidity is 50-60%, and anaerobic fermentation processes 20-30 hour, adds modified aquamaine stone powder, dried small shrimps Powder stirs and completely cuts off air continuation fermentation 10-20 days, filtering drying, puts into and is crushed to 60-80 mesh in pulverizer；
(4) in step (3) material, add combustion adjuvant, water and the mixing of other residual components, send into single lead screw ex truding briquetting machine, with 6MPa's Briquetting pressure is squeezed into a diameter of 5-8mm, the cylindrical particle of a length of 3-8cm, is dried, discharging.
The invention have the advantage that the anaerobism that the present invention carries out 10-20d by a definite date with pretreated corn straw for raw material is sent out After ferment, the relative amount of stalk hemicellulose and cellulose reduces, and lignin relative amount increases, and volatile matter content reduces, benzene alcohol Extract declines can improve the mechanical endurance of shaped fuel, compound resistive connection slag agent and combustion-supporting after finally biogas residue drying being pulverized Other effective ingredient compression forming under the conditions of 6MPa such as agent and carbon fiber, fast desirable pressure of preparation process molding is little contributes to for this Reduce equipment attrition；The present invention using magnesium carbonate as resistive connection slag agent, in combustion Mg element intrinsic with corn straw, The elements such as Si, K, the Na that can cause slagging scorification there occurs reaction, generates new compound K2Mg(SO4)2And make it have resistive connection Slag performance, improves efficiency of combustion and the heat energy of fuel, the shaped fuel matter of preparation using industrial alcohol etc. as firing combustion adjuvant Gently, can sufficiently burn, and the product after burning is rich in various elements, can be used as agricultural fertilizer, accomplishes to recycle, the most dirty Dye environment.
Detailed description of the invention
A kind of lightweight carbon fiber biological matter shaped fuel, is prepared by the raw materials in: corn straw 100, dried small shrimps Powder 12, rice straw 18, magnesium carbonate 4, ferrum oxide 5, carbon fiber 3, industrial alcohol 6, Linesless charcoal 2.3, Nacl 1, albarium 1, indigo plant Spar 17, suitable quantity of water.
The manufacture method of described a kind of lightweight carbon fiber biological matter shaped fuel, comprises the following steps:
(1) Linesless charcoal is put in industrial alcohol and soak 10-12 hour, take out evacuation and be dried and pulverize, addition albarium, Carbon fiber mixes, and is warming up to 80-90 DEG C of ultrasonic grinding 10-15 minute, is dried and prepares combustion adjuvant；
(2) kyanite 5-10wt% hydrochloric acid solution is soaked 1-2 hour, with hot wash to without chloride ion, add water in 80-100 Ultrasonic grinding 8-10 minute at DEG C, dries, and adds ferrum oxide roasting 2-4 hour at 680-760 DEG C, is cooled to grinding at room temperature Prepare modified aquamaine stone powder；
(3) by corn straw, rice straw with hot-water soak 10-12 hour of 60-70 DEG C, filter and put in fermentation vat, control Fermentation vat temperature is at 30-50 DEG C, and humidity is 50-60%, and anaerobic fermentation processes 20-30 hour, adds modified aquamaine stone powder, dried small shrimps Powder stirs and completely cuts off air continuation fermentation 10-20 days, filtering drying, puts into and is crushed to 60-80 mesh in pulverizer；
(4) in step (3) material, add combustion adjuvant, water and the mixing of other residual components, send into single lead screw ex truding briquetting machine, with 6MPa's Briquetting pressure is squeezed into a diameter of 5-8mm, the cylindrical particle of a length of 3-8cm, is dried, discharging.
The technical parameter index using the biomass molding fuel of present invention production is as follows:
(1) relaxed density is 1.185g/cm3；
(2) sulfur content: 0.276%；
(3) ash: 5.93%；
(4) calorific value: 26.62MJ/kg.

Claims (2)

1. a lightweight carbon fiber biological matter shaped fuel, it is characterised in that be prepared by the raw materials in: corn straw 100, dried small shrimps powder 12-14, rice straw 18-20, magnesium carbonate 4-6, ferrum oxide 5-7, carbon fiber 3-5, industrial alcohol 6-8, Linesless charcoal 2.3-2.6, Nacl 1-3, albarium 1-2, kyanite 17-19, suitable quantity of water.
The manufacture method of a kind of lightweight carbon fiber biological matter shaped fuel the most according to claim 1, it is characterised in that bag Include following steps:
(1) Linesless charcoal is put in industrial alcohol and soak 10-12 hour, take out evacuation and be dried and pulverize, addition albarium, Carbon fiber mixes, and is warming up to 80-90 DEG C of ultrasonic grinding 10-15 minute, is dried and prepares combustion adjuvant；
(2) kyanite 5-10wt% hydrochloric acid solution is soaked 1-2 hour, with hot wash to without chloride ion, add water in 80-100 Ultrasonic grinding 8-10 minute at DEG C, dries, and adds ferrum oxide roasting 2-4 hour at 680-760 DEG C, is cooled to grinding at room temperature Prepare modified aquamaine stone powder；
(3) by corn straw, rice straw with hot-water soak 10-12 hour of 60-70 DEG C, filter and put in fermentation vat, control Fermentation vat temperature is at 30-50 DEG C, and humidity is 50-60%, and anaerobic fermentation processes 20-30 hour, adds modified aquamaine stone powder, dried small shrimps Powder stirs and completely cuts off air continuation fermentation 10-20 days, filtering drying, puts into and is crushed to 60-80 mesh in pulverizer；
(4) in step (3) material, add combustion adjuvant, water and the mixing of other residual components, send into single lead screw ex truding briquetting machine, with 6MPa's Briquetting pressure is squeezed into a diameter of 5-8mm, the cylindrical particle of a length of 3-8cm, is dried, discharging.
CN201610090423.6A 2016-02-18 2016-02-18 Lightweight carbon fiber biomass briquette fuel and production method thereof Pending CN105969470A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106520247A (en) * 2016-11-23 2017-03-22 怀宁县鑫茂源生物质颗粒燃料有限公司 Carbonized fiber biomass fuel particles and production method thereof
CN109082323A (en) * 2018-08-21 2018-12-25 芜湖聚焰生物质能源科技有限公司 A kind of preparation method of biomass fuel
CN109233933A (en) * 2017-07-10 2019-01-18 米娜 A kind of energy-saving and environment-friendly smokeless fuel

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101168651A (en) * 2006-10-24 2008-04-30 张弥问 Powder molding additive and application thereof in preparing various shaping products
CN104059709A (en) * 2014-01-23 2014-09-24 江山华隆能源开发有限公司 Preparation method of anti-slagging biomass solid granular fuel
CN104114681A (en) * 2011-12-21 2014-10-22 肯塔基州-田纳西州粘土公司 Mineral additive blend compositions and methods for operating combustors for avoiding problems such as agglomeration, deposition, corrosion and reducing emissions
CN104877728A (en) * 2015-06-10 2015-09-02 山西天润丰农业科技开发有限公司 Method for preparing biomass lump coal
CN105132066A (en) * 2015-07-10 2015-12-09 郎溪县志瑞企业信息服务有限公司 Biomass fuel preparation method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101168651A (en) * 2006-10-24 2008-04-30 张弥问 Powder molding additive and application thereof in preparing various shaping products
CN104114681A (en) * 2011-12-21 2014-10-22 肯塔基州-田纳西州粘土公司 Mineral additive blend compositions and methods for operating combustors for avoiding problems such as agglomeration, deposition, corrosion and reducing emissions
CN104059709A (en) * 2014-01-23 2014-09-24 江山华隆能源开发有限公司 Preparation method of anti-slagging biomass solid granular fuel
CN104877728A (en) * 2015-06-10 2015-09-02 山西天润丰农业科技开发有限公司 Method for preparing biomass lump coal
CN105132066A (en) * 2015-07-10 2015-12-09 郎溪县志瑞企业信息服务有限公司 Biomass fuel preparation method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106520247A (en) * 2016-11-23 2017-03-22 怀宁县鑫茂源生物质颗粒燃料有限公司 Carbonized fiber biomass fuel particles and production method thereof
CN109233933A (en) * 2017-07-10 2019-01-18 米娜 A kind of energy-saving and environment-friendly smokeless fuel
CN109082323A (en) * 2018-08-21 2018-12-25 芜湖聚焰生物质能源科技有限公司 A kind of preparation method of biomass fuel

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Application publication date: 20160928