CN107177394B - Processing method of storable biomass fuel - Google Patents
Processing method of storable biomass fuel Download PDFInfo
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- CN107177394B CN107177394B CN201710540268.8A CN201710540268A CN107177394B CN 107177394 B CN107177394 B CN 107177394B CN 201710540268 A CN201710540268 A CN 201710540268A CN 107177394 B CN107177394 B CN 107177394B
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- biomass fuel
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- 239000002028 Biomass Substances 0.000 title claims abstract description 56
- 239000000446 fuel Substances 0.000 title claims abstract description 34
- 238000003672 processing method Methods 0.000 title claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 41
- 239000002994 raw material Substances 0.000 claims abstract description 26
- 239000010902 straw Substances 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 16
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000002893 slag Substances 0.000 claims abstract description 11
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 7
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 7
- 239000011734 sodium Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims description 19
- 239000000463 material Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000000498 ball milling Methods 0.000 claims description 9
- 239000002048 multi walled nanotube Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 238000007873 sieving Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 230000003009 desulfurizing effect Effects 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- 239000003818 cinder Substances 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract description 24
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 241001391944 Commicarpus scandens Species 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 abstract description 2
- 238000003860 storage Methods 0.000 abstract description 2
- 239000002956 ash Substances 0.000 description 5
- SRBFZHDQGSBBOR-IOVATXLUSA-N D-xylopyranose Chemical compound O[C@@H]1COC(O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-IOVATXLUSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 239000011230 binding agent Substances 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 239000012299 nitrogen atmosphere Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- PYMYPHUHKUWMLA-UHFFFAOYSA-N arabinose Natural products OCC(O)C(O)C(O)C=O PYMYPHUHKUWMLA-UHFFFAOYSA-N 0.000 description 2
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 description 2
- SRBFZHDQGSBBOR-UHFFFAOYSA-N beta-D-Pyranose-Lyxose Natural products OC1COC(O)C(O)C1O SRBFZHDQGSBBOR-UHFFFAOYSA-N 0.000 description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 229920001542 oligosaccharide Polymers 0.000 description 2
- 150000002482 oligosaccharides Chemical class 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 241000209140 Triticum Species 0.000 description 1
- 235000021307 Triticum Nutrition 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001339 alkali metal compounds Chemical class 0.000 description 1
- 229910052910 alkali metal silicate Inorganic materials 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
Classifications
-
- 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
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/02—Use of additives to fuels or fires for particular purposes for reducing smoke development
-
- 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
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/04—Use of additives to fuels or fires for particular purposes for minimising corrosion or incrustation
-
- 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
- C10L2230/14—Function and purpose of a components of a fuel or the composition as a whole for improving storage or transport of the 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
- C10L2250/00—Structural features of fuel components or fuel compositions, either in solid, liquid or gaseous state
- C10L2250/04—Additive or component is a polymer
-
- 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
- C10L2290/28—Cutting, disintegrating, shredding or grinding
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
The invention belongs to the technical field of biomass fuels, and particularly relates to a processing method of a storable biomass fuel. Compared with the prior art, the invention has the following advantages: the method of the invention is used for preparing the mixture, thus reducing slagging corrosion in the straw combustion process; the addition of the hydrofine iron ore and the sodium humate in the mixture can help to improve the forming effect of the biomass fuel, so that the raw material particles have good associativity, the combustion performance of the formed fuel is enhanced, the formed particles can have certain external force resistance by matching with corresponding forming conditions, the formed particles are not easy to break in the transportation or storage process, less smoke and dust are discharged in the combustion process, less ash and slag are generated after combustion, the combustion performance is stable, the anti-slagging capacity is strong, and the slagging corrosion in the straw combustion process can be effectively reduced.
Description
Technical Field
The invention belongs to the technical field of biomass fuels, and particularly relates to a processing method of a storable biomass fuel.
Background
Biomass energy is always the important energy on which human beings rely to live, is second to coal, petroleum and natural gas and occupies the fourth place of the total energy consumption of the local world, plays an important role in the whole energy system, has the advantages of being renewable, clean, pollution-free and the like, and therefore is more and more concerned by people; the existing biomass fuel has the problems of low heat energy utilization efficiency, large consumption and the like, and how to enable the formed biomass dye to be not loose and to be stored for a long time and how to improve the combustion efficiency in the main research direction of the existing biomass fuel, the prior art knows that the heat value of most single biomass after compression forming can not meet the standard, the biomass dye needs to be formed together with additives in the compression process, the additives (such as waste paper scraps, bamboo scraps, sludge and the like) generally serve as a binder in the compression forming of the biomass, the existing additives have relatively single functions after being added, the strength or the heat value is mainly improved, the excessive addition of the additives can influence the combustion performance of biomass fuel rods, particularly, the main raw material of the biomass fuel is straws, the straws can absorb a certain amount of alkali metal elements in the growth process, and the elements exist in a biomass organism in the form of salt or oxide and the like, the melting points of the substances are relatively low, most of the substances are 700-900 ℃, when the straw-like biosolid shaped fuel is combusted in a boiler, the temperature in the furnace is far higher than the melting point of the alkali metal compound, so that the straw ash on the grate begins to soften at the temperature of 800-900 ℃, and when the temperature is too high, the ash will be totally or partially melted to form a glassy hard slag which is difficult to remove, molten or semi-molten alkali metal silicate is entrained in the flue gas, when contacting the inner wall of the boiler, the condensate is condensed and accumulated continuously, and finally serious problems of dust deposition and slag bonding are generated, which not only influences the thermal performance of the combustion equipment, moreover, the safety of combustion equipment can be endangered, and the popularization and application of biomass fuel are influenced, so that how to prepare fuel rods with high hardness and good combustion performance by biomass materials with higher alkalinity index needs to be researched to improve the slagging resistance.
Disclosure of Invention
The invention aims to provide a processing method of a storable biomass fuel, aiming at the problem of poor slagging resistance of the existing straws with high alkalinity index.
The invention is realized by the following technical scheme: a processing method of a storable biomass fuel is characterized in that the main raw material is straw biomass material, the alkalinity index of the straw biomass material is not less than 0.34kg/GJ, and the method specifically comprises the following steps:
(1) drying the biomass raw material to obtain a mixture with the water content of 8-10%, grinding the dried biomass raw material into powder, sieving the powder with a 80-mesh sieve, sealing the powder with a multiwall carbon nanotube which accounts for 7-10% of the weight of the biomass raw material and a sugar-containing solution which accounts for 2-4% of the weight of the multiwall carbon nanotube and has the sugar content of 150-;
(2) uniformly mixing the mixture with 2-4% of fine iron ore and 4-7% of sodium humate in a stirrer to obtain a second mixture;
(3) adjusting the water content of the second mixture to be 14.5-16%, and the particle size of particles accounting for 65-70% of the weight of the second mixture to be 400-.
Further, the sugar-containing solution is a concentrated waste liquid containing sugar generated by a furfural production process, and comprises cellulose containing aromatic hydrocarbon structures, xylose, glucose and oligosaccharide.
Furthermore, the ball milling mass ratio is 20-30, the rotating speed is 600-.
Further, the step (2) also comprises a desulfurizing agent which is 2-4% of the weight of the mixture; the desulfurizer is any one of slag, coal slag or fly ash, and can be used for stably solidifying heavy metal components in the desulfurizer under the synergistic action with the binder.
Further, the particle size of the second mixture is not higher than 2 mm.
Compared with the prior art, the invention has the following advantages: the method of the invention is used for preparing the mixture, and the elastic and inelastic fiber molecules are mutually wound and twisted, so that the melting point of the straw ash in the raw material can be raised, the content of water-soluble potassium and chlorine in the sediment can be reduced, and the slagging corrosion in the straw combustion process can be further reduced; the addition of the hydrofine iron ore and the sodium humate in the mixture can help to improve the forming effect of the biomass fuel, so that the raw material particles have good associativity, the combustion performance of the formed fuel is enhanced, the formed particles can have certain external force resistance by matching with corresponding forming conditions, the formed particles are not easy to break in the transportation or storage process, less smoke and dust are discharged in the combustion process, less ash and slag are generated after combustion, the combustion performance is stable, the anti-slagging capacity is strong, and the slagging corrosion in the straw combustion process can be effectively reduced.
Detailed Description
Example 1
A processing method of a storable biomass fuel is characterized in that the main raw material is straw biomass material, the alkalinity index of the straw biomass material is not less than 0.34kg/GJ, and the method specifically comprises the following steps:
(1) drying the biomass raw material to obtain a mixture with the water content of 8-10%, grinding the dried biomass raw material into powder, sieving the powder with a 80-mesh sieve, mixing the powder with 8% of multiwalled carbon nanotubes and 3% of sugar-containing solution with the sugar content of 180g/L, sealing the mixture in a ball milling tank, and ball milling the mixture for 7 hours in a nitrogen atmosphere to obtain a mixture for later use;
(2) uniformly mixing the mixture with 3% of fine iron ore and 5% of sodium humate in a stirrer to obtain a second mixture;
(3) adjusting the water content of the second mixture to 15.4%, and the particle size of particles accounting for 68% of the weight of the second mixture to 400-.
Specifically, the sugar-containing solution is a concentrated sugar-containing waste liquid generated by a furfural production process, and comprises cellulose containing an aromatic hydrocarbon structure, xylose, glucose and oligosaccharide; in the step (2), the ball milling mass ratio is 25, the rotating speed is 620 r/min, and the obtained mixture has corresponding properties; also comprises a desulfurizer which is 3 percent of the weight of the mixture; the desulfurizer is any one of slag, coal slag or fly ash, and can be used for stably solidifying heavy metal components in the desulfurizer under the synergistic action with the binder.
Further, the particle size of the second mixture is not higher than 2 mm.
Example 2
A processing method of a storable biomass fuel is characterized in that the main raw material is straw biomass material, the alkalinity index of the straw biomass material is not less than 0.34kg/GJ, and the method specifically comprises the following steps:
(1) drying the biomass raw material to obtain a mixture with the water content of 8%, grinding the dried biomass raw material into powder, sieving the powder by a 80-mesh sieve, mixing the powder with a multiwalled carbon nanotube accounting for 10% of the weight of the biomass raw material and a 2% sugar-containing solution with the sugar content of 150g/L, sealing the mixture in a ball milling tank, and carrying out ball milling for 8 hours in a nitrogen atmosphere to obtain a mixture for later use;
(2) uniformly mixing the mixture with 2% of fine iron ore and 7% of sodium humate in a stirrer to obtain a second mixture;
(3) adjusting the water content of the second mixture to be 14.5%, and the particle size of particles accounting for 65% of the weight of the second mixture to be 400-600 mu m, obtaining a finished substance by a mode-changing briquetting machine under the condition of the pressure of 35MPa, and drying to obtain the biomass fuel.
The rest is the same as in example 1.
Example 3
A processing method of a storable biomass fuel is characterized in that the main raw material is straw biomass material, the alkalinity index of the straw biomass material is not less than 0.34kg/GJ, and the method specifically comprises the following steps:
(1) drying the biomass raw material to obtain a mixture with the water content of 10%, grinding the dried biomass raw material into powder, sieving the powder by a 80-mesh sieve, sealing the powder with a multiwalled carbon nanotube which accounts for 7% of the weight of the biomass raw material and a sugar-containing solution which accounts for 4% of the weight of the multiwalled carbon nanotube and contains 200g/L of sugar in a ball-milling tank, and ball-milling the powder for 6 hours in a nitrogen atmosphere to obtain a mixture for later use;
(2) uniformly mixing the mixture with 4% of fine iron ore and 4% of sodium humate in a stirrer to obtain a second mixture;
(3) adjusting the water content of the second mixture to 16%, and the particle size of particles accounting for 70% of the weight of the second mixture to 400-.
The rest is the same as in example 1.
Setting experiments, wherein wheat straws with the alkalinity index of 1.07kg/GJ are used as experimental raw materials;
setting a control group 1, preparing a round rod-shaped molding material with the diameter of 20mm by taking a straw raw material with the alkalinity index of more than 0.34kg/GJ according to a conventional method, cutting out 3cm, depositing and slagging combustion products after combustion, and setting the reorganized slagging amount to be 1;
setting a control group 2, removing the step (1) in the embodiment 1, grinding the biomass raw material into powder, and directly performing the step (2) and subsequent operations;
setting a comparison group 3, removing the cellophane in the embodiment 1, and keeping the rest contents unchanged;
setting a control group 4, and using the preparation conditions of the fuel rod prepared in the step (3) in the example 1 by using a conventional method to obtain the fuel rod with the water content of about 40%;
selecting 10 fuel rods in each group, placing in a plastic bag, dropping on the cement ground at a height of 2m, repeating for 10 times, separating out the fragments and powder generated by dropping impact, calculating the ratio between the fragments and the powder and the fuel rods to obtain the breakage rate, and detecting the properties of the fuel rods with the same specification prepared in each group to obtain the following results:
TABLE 1
| Group of | Mass before combustion (g) | Ash mass (g) | Combustion ratio (%) | Percentage of breakage (%) | Amount of slag formation |
| Example 1 | 1435 | 40.18 | 97.2 | 0.14 | 0.23 |
| Example 2 | 1435 | 37.31 | 97.4 | 0.16 | 0.31 |
| Example 3 | 1435 | 41.62 | 97.1 | 0.17 | 0.27 |
| Control group 1 | 1435 | 83.23 | 94.2 | 2.83 | 1 |
| Control group 2 | 1435 | 47.36 | 96.7 | 0.76 | 1.26 |
| Control group 3 | 1435 | 78.96 | 94.5 | 1.24 | 0.53 |
| Control group 4 | 1435 | 54.53 | 96.2 | 2.25 | 0.47 |
As can be seen from the data in the table 1, the biomass fuel prepared by the method has good combustion performance, compact structure and low possibility of breaking, and the slag bonding amount is small after combustion; wherein, the content in the step (1) has larger influence on the anti-slagging performance, and the ferrihydrite has larger influence on the shatter resistance and the combustion performance of the biomass fuel.
Claims (6)
1. A processing method of a storable biomass fuel is characterized in that the main raw material is straw biomass material, the alkalinity index of which is not less than 0.34kg/GJ, and the method specifically comprises the following steps:
(1) drying the biomass raw material to obtain a mixture with the water content of 8-10%, grinding the dried biomass raw material into powder, sieving the powder with a 80-mesh sieve, sealing the powder with a multiwall carbon nanotube which accounts for 7-10% of the weight of the biomass raw material and a sugar-containing solution which accounts for 2-4% of the weight of the multiwall carbon nanotube and has the sugar content of 150-;
(2) uniformly mixing the mixture with 2-4% of fine iron ore and 4-7% of sodium humate in a stirrer to obtain a second mixture;
(3) adjusting the water content of the second mixture to be 14.5-16%, and the particle size of particles accounting for 65-70% of the weight of the second mixture to be 400-.
2. The method of claim 1, wherein the sugar-containing solution is a concentrated waste sugar-containing liquid produced by a furfural production process.
3. The method for processing the storable biomass fuel according to claim 1, wherein the ball milling mass ratio is 20-30, and the rotation speed is 600-650 rpm.
4. The method for processing the storable biomass fuel according to claim 1, wherein the step (2) further comprises a desulfurizing agent which is 2-4% of the weight of the mixed material.
5. The method for processing the storable biomass fuel according to claim 4, wherein the desulfurizing agent is any one of slag, coal cinder or fly ash.
6. The method of claim 1, wherein the second blend has a particle size of no greater than 2 mm.
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