CN110819414A - Preparation process of biomass granular fuel - Google Patents
Preparation process of biomass granular fuel Download PDFInfo
- Publication number
- CN110819414A CN110819414A CN201911022377.6A CN201911022377A CN110819414A CN 110819414 A CN110819414 A CN 110819414A CN 201911022377 A CN201911022377 A CN 201911022377A CN 110819414 A CN110819414 A CN 110819414A
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- Prior art keywords
- parts
- hay
- sawdust
- fly ash
- barks
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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
- C10L5/442—Wood or forestry waste
-
- 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
-
- 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 relates to the field of biomass fuel preparation, in particular to a preparation process of biomass granular fuel, which takes peanut shells, straws, sawdust, rice hulls, barks and hay as main raw materials, wherein the particle size of the main raw materials is set to be 2-5mm, and porous ceramics and fly ash with porous structures are used as auxiliary materials, so that the formed biomass granular fuel has a dense porous structure and is convenient to fully contact with oxygen during combustion, thereby providing combustion efficiency.
Description
Technical Field
The invention relates to the field of biomass fuel preparation, in particular to a preparation process of biomass granular fuel.
Background
The biomass pellet fuel is formed by compressing biomass raw materials (mainly crop straws, agricultural product processing residues and forestry residues) after pretreatment such as drying, crushing, blending and the like. The density of the formed granular fuel is more than 1000kg/m3, the combustion value reaches 3500-5000 kcal/kg, the energy density is equivalent to that of medium-grade bituminous coal, the granular fuel is convenient to convey and store, and the granular fuel can be used for replacing fossil fuels such as coal and the like in civil fields such as cooking, heating and the like and industrial fields such as boiler combustion, power generation and the like.
At present, the granulation method adopted in China is a traditional production method, and comprises the steps of raw material drying, pressing, cooling, packaging and the like. With social development, the problem of low ash melting point of the traditional biomass solid briquette fuel produced by taking straws as a raw material is solved, but the problems of insufficient combustion, low utilization rate of the raw material and the like still exist, and how to improve the combustion utilization rate of the raw material in the preparation of the biomass fuel is the problem to be solved by the invention.
Disclosure of Invention
In view of the above, the invention provides a preparation process of biomass granular fuel, which takes peanut shells, straws, sawdust, rice hulls, barks and hay as main raw materials, wherein the particle size of the main raw materials is set to be 2-5mm, and porous ceramics and fly ash with porous structures are used as auxiliary materials, so that the formed biomass granular fuel has a dense porous structure and is convenient to fully contact with oxygen during combustion, thereby providing combustion efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
a process for preparing a biomass pellet fuel, comprising:
s1, weighing the following raw materials in parts by weight: 10-20 parts of peanut shell, 10-20 parts of straw, 10-20 parts of sawdust, 10-20 parts of rice hull, 10-20 parts of bark, 10-20 parts of hay, 2-5 parts of porous ceramic, 2-5 parts of fly ash, 8-15 parts of adhesive, 5-10 parts of combustion improver, 1-3 parts of dispersant and 50-80 parts of water;
s2, crushing peanut shells, straws, sawdust, rice hulls, barks and hay to 2-5mm, removing large blocks and scrap iron impurities through a screening machine, and crushing porous ceramics and fly ash to 5-8mm for later use;
s3, feeding the crushed peanut shells, straws, sawdust, rice hulls, barks and hay into a drum dryer, setting the rotation speed at 1000-2000r/m and the temperature at 85-120 ℃, and keeping the temperature for 20-60min to ensure that the water content is 0.5-5%;
s4, mixing porous ceramic, fly ash and water, adding a dispersing agent, setting the rotating speed of a stirrer to be 400-fold sand 600r/m, keeping for 5-9min, mixing dried peanut shells, straws, sawdust, rice hulls, barks and hay, adding an adhesive, setting the rotating speed of the stirrer to be 600-fold sand 1000r/m, and keeping for 8-15min to prepare a thick slurry material;
s5, feeding the thick slurry material into a screw extruder, dehydrating the material until the water content is 15-25%, and extruding the material into a wet molding material B according to the required shape;
s6, mixing the molding material B and the combustion improver into the drum mixer, setting the rotating speed at 100-120r/m, and keeping for 10-20min to enable the combustion improver to be uniformly adhered to the surface of the molding material B;
s7, drying the molding material B processed by the S6 until the water content is 5-10% to obtain a finished product of the biomass pellet fuel.
Preferably, in S1, the following raw materials are weighed in parts by weight: 15 parts of peanut shell, 15 parts of straw, 15 parts of sawdust, 15 parts of rice hull, 15 parts of bark, 15 parts of hay, 3 parts of porous ceramic, 3 parts of fly ash, 12 parts of adhesive, 6 parts of combustion improver, 2 parts of dispersant and 60 parts of water.
Preferably, in S1, the combustion improver is any two of a leavening agent, an oxidizing agent, a catalyst, and a desulfurizing agent.
Preferably, in S2, the peanut shell, straw, wood chips, rice hull, bark, and hay are pulverized to 3mm, and the porous ceramic and fly ash are pulverized to 6mm for use.
Preferably, in S3, the crushed peanut shells, straw, wood chips, rice hulls, barks, and hay are fed into a drum dryer at a rotation speed of 1500r/m and a temperature of 90 ℃ for 40min to reach a water content of 3%.
Preferably, in S4, porous ceramic, fly ash and water are mixed, dispersant is added, the rotating speed of a stirrer is set to be 500r/m, dried peanut shells, straws, sawdust, rice hulls, barks and hay are mixed after the mixture is kept for 7min, adhesive is added, the rotating speed of the stirrer is set to be 800r/m, and the mixture is kept for 12min to prepare thick slurry material.
Preferably, in S5, the material is cylindrically extruded to obtain a wet shaped material B by feeding the thick slurry material into a screw extruder to dehydrate the material to a water content of 20%.
Preferably, in S6, the molding material B and the combustion improver are mixed into the drum mixer, the set rotating speed is 110r/m, and the mixture is kept for 15min to enable the combustion improver to be uniformly adhered to the surface of the molding material B.
Preferably, in S7, the molding material B processed in S6 is dried to a moisture content of 7% to obtain a finished product of biomass pellet fuel.
Compared with the prior art, the invention has the beneficial effects that: the invention takes peanut shells, straws, wood chips, rice hulls, barks and hay as main raw materials, the particle size of the main raw materials is set to be 2-5mm, and porous ceramics and fly ash with porous structures are used as auxiliary materials, so that the formed biomass granular fuel has dense porous structures and is convenient to fully contact with oxygen during combustion, thereby providing combustion efficiency.
Detailed Description
The technical solutions in the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A process for preparing a biomass pellet fuel, comprising:
s1, weighing the following raw materials in parts by weight: 15 parts of peanut shell, 15 parts of straw, 15 parts of sawdust, 15 parts of rice hull, 15 parts of bark, 15 parts of hay, 3 parts of porous ceramic, 3 parts of fly ash, 12 parts of adhesive, 6 parts of combustion improver, 2 parts of dispersant and 60 parts of water;
s2, crushing peanut shells, straws, sawdust, rice hulls, barks and hay to 3mm, removing large blocks and scrap iron impurities through a screening machine, and crushing porous ceramics and fly ash to 6mm for later use;
s3, feeding the crushed peanut shells, straws, sawdust, rice hulls, barks and hay into a drum dryer, setting the rotation speed at 1500r/m and the temperature at 90 ℃, and keeping the rotation speed for 40min to ensure that the water content is 3%;
s4, mixing porous ceramic, fly ash and water, adding a dispersing agent, setting the rotating speed of a stirrer to be 500r/m, keeping for 7min, mixing dried peanut shells, straws, sawdust, rice hulls, barks and hay, adding an adhesive, setting the rotating speed of the stirrer to be 800r/m, and keeping for 12min to prepare a thick slurry material;
s5, feeding the thick slurry material into a screw extruder, dehydrating the material until the water content is 20%, and extruding the material into a wet molding material B according to the required shape;
s6, mixing the molding material B and the combustion improver into a drum mixer, setting the rotation speed to be 110r/m, and keeping for 15min to enable the combustion improver to be uniformly adhered to the surface of the molding material B;
s7, drying the molding material B processed by the S6 until the water content is 7 percent, and obtaining a finished product of the biomass pellet fuel.
Example 2
A process for preparing a biomass pellet fuel, comprising:
s1, weighing the following raw materials in parts by weight: 18 parts of peanut shell, 20 parts of straw, 15 parts of sawdust, 20 parts of rice hull, 12 parts of bark, 18 parts of hay, 4 parts of porous ceramic, 3 parts of fly ash, 9 parts of adhesive, 6 parts of combustion improver, 3 parts of dispersant and 65 parts of water;
s2, crushing peanut shells, straws, sawdust, rice hulls, barks and hay to 2mm, removing large blocks and scrap iron impurities through a screening machine, and crushing porous ceramics and fly ash to 5mm for later use;
s3, feeding the crushed peanut shells, straws, sawdust, rice hulls, barks and hay into a drum dryer, setting the rotation speed at 1100r/m and the temperature at 85 ℃, and keeping the rotation speed for 45min to ensure that the water content is 3%;
s4, mixing porous ceramic, fly ash and water, adding a dispersing agent, setting the rotating speed of a stirrer to be 450r/m, keeping for 6min, mixing dried peanut shells, straws, sawdust, rice hulls, barks and hay, adding an adhesive, setting the rotating speed of the stirrer to be 700r/m, and keeping for 11min to prepare a thick slurry material;
s5, feeding the thick slurry material into a screw extruder, dehydrating the material until the water content is 19%, and extruding the material into a wet molding material B according to the required shape;
s6, mixing the molding material B and the combustion improver into the drum mixer, setting the rotating speed to be 100r/m, and keeping for 18min to enable the combustion improver to be uniformly adhered to the surface of the molding material B;
s7, drying the molding material B processed by the S6 until the water content is 5% to obtain a finished product of the biomass pellet fuel.
Example 3
A process for preparing a biomass pellet fuel, comprising:
s1, weighing the following raw materials in parts by weight: 16 parts of peanut shell, 20 parts of straw, 15 parts of sawdust, 20 parts of rice hull, 18 parts of bark, 19 parts of hay, 5 parts of porous ceramic, 5 parts of fly ash, 13 parts of adhesive, 7 parts of combustion improver, 3 parts of dispersant and 75 parts of water;
s2, crushing peanut shells, straws, sawdust, rice hulls, barks and hay to 4mm, removing large blocks and scrap iron impurities through a screening machine, and crushing porous ceramics and fly ash to 8mm for later use;
s3, feeding the crushed peanut shells, straws, sawdust, rice hulls, barks and hay into a drum dryer, setting the rotation speed at 1500r/m and the temperature at 100 ℃, and keeping the rotation speed for 35min to enable the water content to be 4%;
s4, mixing porous ceramic, fly ash and water, adding a dispersing agent, setting the rotating speed of a stirrer to be 500r/m, keeping for 8min, mixing dried peanut shells, straws, sawdust, rice hulls, barks and hay, adding an adhesive, setting the rotating speed of the stirrer to be 800r/m, and keeping for 11min to prepare a thick slurry material;
s5, feeding the thick slurry material into a screw extruder, dehydrating the material until the water content is 25%, and extruding the material into a wet molding material B according to the required shape;
s6, mixing the molding material B and the combustion improver into a drum mixer, setting the rotation speed to be 120r/m, and keeping for 13min to enable the combustion improver to be uniformly adhered to the surface of the molding material B;
s7, drying the molding material B processed by the S6 until the water content is 7 percent, and obtaining a finished product of the biomass pellet fuel.
Finally, it should be noted that the above-mentioned preferred embodiments of the present invention are provided merely to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. A preparation process of biomass granular fuel is characterized by comprising the following steps:
s1, weighing the following raw materials in parts by weight: 10-20 parts of peanut shell, 10-20 parts of straw, 10-20 parts of sawdust, 10-20 parts of rice hull, 10-20 parts of bark, 10-20 parts of hay, 2-5 parts of porous ceramic, 2-5 parts of fly ash, 8-15 parts of adhesive, 5-10 parts of combustion improver, 1-3 parts of dispersant and 50-80 parts of water;
s2, crushing peanut shells, straws, sawdust, rice hulls, barks and hay to 2-5mm, removing large blocks and scrap iron impurities through a screening machine, and crushing porous ceramics and fly ash to 5-8mm for later use;
s3, feeding the crushed peanut shells, straws, sawdust, rice hulls, barks and hay into a drum dryer, setting the rotation speed at 1000-2000r/m and the temperature at 85-120 ℃, and keeping the temperature for 20-60min to ensure that the water content is 0.5-5%;
s4, mixing porous ceramic, fly ash and water, adding a dispersing agent, setting the rotating speed of a stirrer to be 400-fold sand 600r/m, keeping for 5-9min, mixing dried peanut shells, straws, sawdust, rice hulls, barks and hay, adding an adhesive, setting the rotating speed of the stirrer to be 600-fold sand 1000r/m, and keeping for 8-15min to prepare a thick slurry material;
s5, feeding the thick slurry material into a screw extruder, dehydrating the material until the water content is 15-25%, and extruding the material into a wet molding material B according to the required shape;
s6, mixing the molding material B and the combustion improver into the drum mixer, setting the rotating speed at 100-120r/m, and keeping for 10-20min to enable the combustion improver to be uniformly adhered to the surface of the molding material B;
s7, drying the molding material B processed by the S6 until the water content is 5-10% to obtain a finished product of the biomass pellet fuel.
2. The preparation process of the biomass pellet fuel as claimed in claim 1, wherein in S1, the following raw materials are weighed in parts by weight: 15 parts of peanut shell, 15 parts of straw, 15 parts of sawdust, 15 parts of rice hull, 15 parts of bark, 15 parts of hay, 3 parts of porous ceramic, 3 parts of fly ash, 12 parts of adhesive, 6 parts of combustion improver, 2 parts of dispersant and 60 parts of water.
3. The process of claim 1, wherein in S1, the combustion improver is any two of a swelling agent, an oxidant, a catalyst and a desulfurizing agent.
4. The process of claim 1, wherein in step S2, the peanut shells, the straw, the wood chips, the rice hulls, the barks, and the hay are pulverized to 3mm, and the porous ceramics and the fly ash are pulverized to 6mm for use.
5. The process of claim 1, wherein in step S3, the crushed peanut shells, straw, wood chips, rice hulls, bark, and hay are fed into a drum dryer at a rotation speed of 1500 rpm and a temperature of 90 ℃ for 40min to reach a moisture content of 3%.
6. The process of claim 1, wherein in S4, the porous ceramic and the fly ash are mixed with water, the dispersing agent is added, the rotation speed of the stirrer is set to be 500r/m, the mixture is kept for 7min, then the dried peanut shells, straws, sawdust, rice hulls, barks and hay are mixed, the adhesive is added, the rotation speed of the stirrer is set to be 800r/m, and the mixture is kept for 12min to obtain the thick slurry material.
7. The process of claim 1, wherein in step S5, the slurry material is fed into a screw extruder, and after the material is dewatered to a water content of 20%, the material is extruded in a cylindrical shape to obtain a wet molding material B.
8. The process of claim 1, wherein in step S6, the forming material B and the combustion improver are mixed into the drum mixer, the rotation speed is set to 110r/m, and the mixture is kept for 15min to make the combustion improver uniformly adhere to the surface of the forming material B.
9. The process of claim 1, wherein in S7, the shaped material B processed in S6 is dried to a moisture content of 7% to obtain a finished biomass pellet fuel.
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| CN201911022377.6A CN110819414A (en) | 2019-10-25 | 2019-10-25 | Preparation process of biomass granular fuel |
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| CN201911022377.6A CN110819414A (en) | 2019-10-25 | 2019-10-25 | Preparation process of biomass granular fuel |
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