WO2022254842A1 - 固体燃料製造装置、ボイラシステム、および、固体燃料製造方法 - Google Patents

固体燃料製造装置、ボイラシステム、および、固体燃料製造方法 Download PDF

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Publication number
WO2022254842A1
WO2022254842A1 PCT/JP2022/008904 JP2022008904W WO2022254842A1 WO 2022254842 A1 WO2022254842 A1 WO 2022254842A1 JP 2022008904 W JP2022008904 W JP 2022008904W WO 2022254842 A1 WO2022254842 A1 WO 2022254842A1
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WO
WIPO (PCT)
Prior art keywords
solid fuel
biomass
additive
mixing
ash
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Application number
PCT/JP2022/008904
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English (en)
French (fr)
Japanese (ja)
Inventor
健太 安田
恵美 大野
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株式会社Ihi
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Application filed by 株式会社Ihi filed Critical 株式会社Ihi
Priority to JP2023525403A priority Critical patent/JPWO2022254842A1/ja
Publication of WO2022254842A1 publication Critical patent/WO2022254842A1/ja

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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
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
    • 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

Definitions

  • the present disclosure relates to solid fuel manufacturing equipment, boiler systems, and solid fuel manufacturing methods.
  • This application claims the benefit of priority based on Japanese Patent Application No. 2021-91170 filed on May 31, 2021, the content of which is incorporated herein by reference.
  • Patent Document 1 includes a pulverizer that pulverizes coal and biomass, and a boiler furnace that burns the pulverized coal and biomass.
  • the melting point of biomass ash produced by burning only biomass is lower than the melting point of coal ash produced by burning only coal. Therefore, when biomass is co-fired with coal as in the technique of Patent Document 1, the melting point of ash is lower than when only coal is burned. Then, there is a problem that the ash melts and adheres to the inner wall of the coal-fired boiler, thereby reducing the heat exchange efficiency of the coal-fired boiler.
  • the present disclosure aims to provide a solid fuel manufacturing apparatus, a boiler system, and a solid fuel manufacturing method that can raise the melting point of ash compared to biomass ash.
  • a solid fuel production apparatus includes a mixing unit that mixes an additive containing at least silica and a first biomass, and granulates the mixture obtained by the mixing unit. and a granulating unit.
  • the mixing section may mix the first biomass with an additive that is smaller than the first biomass.
  • the additive may be a second biomass of a different type from the first biomass.
  • the additive may be coal ash.
  • a boiler system includes a mixing unit that mixes an additive containing at least silica and a first biomass, and granulates the mixture obtained by the mixing unit.
  • a granulator for producing solid fuel and a furnace for burning the solid fuel are provided.
  • a method for producing a solid fuel according to an aspect of the present disclosure is obtained by performing a step of mixing an additive containing at least silica and a first biomass, and a step of mixing and granulating the mixture.
  • FIG. 1 is a figure explaining the boiler system concerning an embodiment.
  • FIG. 2 is a diagram for explaining the solid fuel manufacturing device according to the embodiment.
  • FIG. 3 is a flow chart explaining the flow of processing of the solid fuel manufacturing method according to the embodiment.
  • FIG. 4 is a diagram illustrating the relationship between the ratio of basic components contained in ash and the softening point of ash.
  • FIG. 1 is a diagram illustrating a boiler system 100 according to this embodiment.
  • the solid-line arrows indicate the flows of the solid fuel F, the coal C, and the mixture M.
  • the boiler system 100 includes a solid fuel manufacturing device 110, a solid fuel storage unit 120, a coal storage unit 130, a mill 140, and a furnace 150.
  • the solid fuel production device 110 produces solid fuel F (pellets) containing biomass (first biomass).
  • the biomass is any one or more of woody biomass, herbaceous biomass, and waste biomass.
  • Woody biomass is, for example, wood, sawdust, bark, and the like.
  • Herbaceous (vegetable) biomass includes, for example, sugarcane, sorghum, bamboo, wheat straw, and rice straw.
  • Waste biomass includes, for example, empty fruit bunches (EFB) and palm kernel shells (PKS) produced as a result of producing palm oil from palm coconuts.
  • EFB empty fruit bunches
  • PKS palm kernel shells
  • wood is taken as an example of biomass.
  • the solid fuel storage unit 120 stores solid fuel F.
  • the solid fuel F stored in the solid fuel storage section 120 is supplied to the mill 140 .
  • the coal storage unit 130 stores coal C. Coal C stored in the coal storage unit 130 is supplied to the mill 140 .
  • the mill 140 grinds the solid fuel F and the coal C.
  • a mixture M of solid fuel F and coal C pulverized in mill 140 is fed to the combustion port of furnace 150 .
  • the furnace 150 burns the mixture M. That is, the solid fuel F is used as fuel for the furnace 150 .
  • the solid fuel production device 110 will be described in detail below.
  • FIG. 2 is a diagram illustrating the solid fuel production device 110 according to this embodiment.
  • solid arrows indicate the flow of the biomass raw material R, the additive A, the mixture N, and the solid fuel F.
  • the solid fuel production device 110 includes a cutting section 210, a pulverizing section 220, a drying section 230, an additive storage section 240, a mixing section 250, and a granulating section 260.
  • the cutting unit 210 cuts the biomass raw material R (first biomass, wood here).
  • the pulverizing section 220 pulverizes the biomass raw material R cut by the cutting section 210 .
  • the drying section 230 dries the biomass raw material R pulverized by the pulverizing section 220 .
  • the drying unit 230 dries the biomass raw material R to such an extent that the water (moisture content) contained in the biomass raw material R becomes equal to or less than a predetermined value. Therefore, the biomass raw material R is not carbonized by the drying section 230 .
  • the biomass raw material R dried by the drying section 230 is supplied to the mixing section 250 .
  • the additive storage unit 240 stores the additive A.
  • Additive A contains silica (SiO 2 ) and alumina (Al 2 O 3 ).
  • Additive A is, for example, coal ash.
  • the additive A stored in the additive storage section 240 is supplied to the mixing section 250 .
  • the mixing unit 250 mixes the additive A and the biomass raw material R.
  • the mixing section 250 is, for example, a drum mixer.
  • the mixing unit 250 mixes the additive A, which is smaller than the biomass raw material R, and the biomass raw material R. That is, the mixing unit 250 mixes the additive A having a volume smaller than that of the biomass raw material R and the biomass raw material R.
  • the mixing unit 250 mixes an additive A shorter than the biomass raw material R or an additive A having a smaller average particle size than the biomass raw material R into the biomass raw material R.
  • the granulating section 260 granulates the mixture N obtained by the mixing section 250 to produce the solid fuel F (pellets).
  • the granulating section 260 is a pelletizer.
  • the solid fuel F thus produced is stored in the solid fuel storage unit 120, pulverized in the mill 140, and supplied to the furnace 150.
  • FIG. 3 is a flow chart explaining the flow of processing of the solid fuel production method according to the present embodiment.
  • the solid fuel production method includes a cutting step S110, a crushing step S120, a drying step S130, a mixing step S140, and a granulating step S150. Each step will be described below.
  • the cutting step S110 is a step in which the cutting part 210 cuts the biomass raw material R. As shown in FIG.
  • the pulverizing step S120 is a step in which the pulverizing unit 220 pulverizes the biomass raw material R that has been cut by performing the cutting step S110.
  • the drying step S130 is a step in which the drying unit 230 dries the biomass raw material R pulverized by performing the pulverization step S120.
  • the mixing step S140 is a step in which the mixing unit 250 mixes the biomass raw material R dried by performing the drying step S130 and the additive A.
  • the granulation step S150 is a step in which the granulation section 260 granulates the mixture N obtained by performing the mixing step S140.
  • the solid fuel production device 110 and the solid fuel production method according to the present embodiment produce solid fuel F by adding additive A containing at least silica to biomass (biomass raw material R).
  • the solid fuel manufacturing apparatus 110 can manufacture the solid fuel F in which the melting point of the ash (solid fuel ash) produced by burning the solid fuel F is raised compared to the biomass ash.
  • Fig. 4 is a diagram explaining the relationship between the ratio of basic components contained in ash and the softening point of ash.
  • the horizontal axis indicates the ratio [%] of basic components contained in the ash.
  • the vertical axis indicates the softening point [°C] of ash.
  • the solid line indicates biomass ash, and the dashed line indicates coal ash.
  • Biomass ash contains sodium (Na), potassium (K), magnesium (Mg), calcium (Ca), and iron (Fe).
  • biomass ash contains about 30% to about 60% basic components and has a softening point of about 1000°C to about 1400°C.
  • Coal ash contains silica, alumina and titania (TiO 2 ).
  • coal ash contains about 10% to about 20% basic components and has a softening point of about 1400°C to about 1500°C.
  • the solid fuel production apparatus 110 produces the solid fuel F by adding coal ash as the additive A to the biomass raw material R, thereby increasing the softening point of the solid fuel ash, that is, the melting point of the solid fuel ash. be able to.
  • the solid fuel manufacturing apparatus 110 can manufacture the solid fuel F that can suppress adhesion of solid fuel ash to the inner wall of the furnace 150 . Therefore, the solid fuel manufacturing apparatus 110 can manufacture the solid fuel F based on the solid fuel ash, which can suppress corrosion and decrease in heat exchange efficiency.
  • the mixing unit 250 mixes the additive A, which is smaller than the biomass raw material R, and the biomass raw material R. Thereby, the mixing section 250 can mix the additive A and the biomass raw material R substantially uniformly. In addition, it becomes possible to improve the granulation performance of the granulation unit 260 .
  • the mixing unit 250 uses coal ash as the additive A. Thereby, the solid fuel manufacturing apparatus 110 can reduce the cost required for the additive A.
  • the boiler system 100 also supplies the solid fuel F containing the biomass raw material R and the additive A to the combustion port of the furnace 150 .
  • the boiler system 100 can suppress sticking of ash to the inner wall of the furnace 150 more than the comparative example in which the biomass raw material R and the additive A are supplied to the furnace 150 through separate ports.
  • the place where the additive A flows may be limited. occur.
  • the boiler system 100 supplies the solid fuel F to the combustion port of the furnace 150, the biomass raw material R and the additive A can be supplied to the furnace 150 in a substantially uniformly mixed state. As a result, the boiler system 100 can evenly flow the additive A into the furnace 150 , and can suppress adhesion of ash to the inner wall of the furnace 150 .
  • additive A is coal ash
  • additive A may contain silica and alumina.
  • the additive A should just contain silica at least.
  • additive A may be silica sand.
  • the additive A may be a different kind of biomass from the biomass raw material R (second biomass).
  • the second biomass contains at least silica.
  • the second biomass is, for example, rice husks.
  • This disclosure can contribute, for example, to Goal 7 of the Sustainable Development Goals (SDGs) "Ensure access to affordable, reliable, sustainable and modern energy”.
  • SDGs Sustainable Development Goals
  • Boiler system 110 Solid fuel manufacturing device 150: Furnace 250: Mixing unit 260: Pelletizing unit

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
PCT/JP2022/008904 2021-05-31 2022-03-02 固体燃料製造装置、ボイラシステム、および、固体燃料製造方法 WO2022254842A1 (ja)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59500819A (ja) * 1982-05-12 1984-05-10 ポウルセン，ハンス　デイツトレブ わらまたは類似の物質のブロツクの製造方法
JPS62263287A (ja) * 1986-05-10 1987-11-16 Boruneo Baiomasu Kenkyusho:Kk もみ殻および稲わらより固形燃料を製造する方法
JP2005330391A (ja) * 2004-05-20 2005-12-02 Kondo Tekko:Kk 燃料用ペレット及びその製造方法
WO2017141624A1 (ja) * 2016-02-15 2017-08-24 株式会社日立製作所 植物性バイオ燃料改質方法及びシステム
JP2020090674A (ja) * 2018-10-30 2020-06-11 株式会社ブルーオーシャン産業 酸化アルミナを利用したバイオマス混焼または専用ボイラーのファウリング、スラッギング及び腐食防止用添加剤組成物

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59500819A (ja) * 1982-05-12 1984-05-10 ポウルセン，ハンス　デイツトレブ わらまたは類似の物質のブロツクの製造方法
JPS62263287A (ja) * 1986-05-10 1987-11-16 Boruneo Baiomasu Kenkyusho:Kk もみ殻および稲わらより固形燃料を製造する方法
JP2005330391A (ja) * 2004-05-20 2005-12-02 Kondo Tekko:Kk 燃料用ペレット及びその製造方法
WO2017141624A1 (ja) * 2016-02-15 2017-08-24 株式会社日立製作所 植物性バイオ燃料改質方法及びシステム
JP2020090674A (ja) * 2018-10-30 2020-06-11 株式会社ブルーオーシャン産業 酸化アルミナを利用したバイオマス混焼または専用ボイラーのファウリング、スラッギング及び腐食防止用添加剤組成物

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