EP2508589A1 - Boue de charbon et procédés de fabrication de boue de charbon - Google Patents

Boue de charbon et procédés de fabrication de boue de charbon Download PDF

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Publication number
EP2508589A1
EP2508589A1 EP12163250A EP12163250A EP2508589A1 EP 2508589 A1 EP2508589 A1 EP 2508589A1 EP 12163250 A EP12163250 A EP 12163250A EP 12163250 A EP12163250 A EP 12163250A EP 2508589 A1 EP2508589 A1 EP 2508589A1
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EP
European Patent Office
Prior art keywords
coal
water slurry
particles
smaller
range
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12163250A
Other languages
German (de)
English (en)
Inventor
Mingmin Wang
Junli Xue
Dejia Wang
Shiguang Li
Lishun Hu
Xijing Bi
Wenhua Li
Wei Chen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Publication of EP2508589A1 publication Critical patent/EP2508589A1/fr
Withdrawn legal-status Critical Current

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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
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
    • C10L1/326—Coal-water suspensions
    • 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
    • C10L1/00—Liquid carbonaceous fuels
    • C10L1/32—Liquid carbonaceous fuels consisting of coal-oil suspensions or aqueous emulsions or oil emulsions
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels

Definitions

  • This invention relates generally to coal water slurry and methods for making the coal water slurry. More particularly, this invention relates to particle size distribution of coal in coal water slurry and methods for making the coal water slurry.
  • coal gasification fields two types of methods are usually employed to supply coal to a gasifier for gasification.
  • One is pneumatically transporting pulverized coal with pressurized nitrogen and spraying the coal into a gasifier.
  • Another is preparing a slurry of coal and water, which hereinafter is referred to as "coal water slurry," and supplying the coal water slurry to a gasifier.
  • the "coal water slurry” method has been widely used because it is more reliable, easy transportable and adaptable to a higher gasification pressure than the method employing coal in a dry state.
  • coal concentration may not be as high as desirable and may cause undesirable viscosity in the coal water slurry with the increase of the coal concentration in the water slurry concentration by modification of the coal particle size distribution.
  • a coal water slurry is provided in accordance with one embodiment of the invention.
  • the coal water slurry comprises smaller and larger coal particles.
  • the smaller coal particles are in a range of from about 20wt% to about 90wt% of the coal in the coal water slurry and comprise a mean particle size smaller than 26 ⁇ m.
  • the larger coal particles are in a range of from about 10wt% to about 80wt% of the coal in the coal water slurry and comprise a mean particle size in a range of from 50 ⁇ m to 200 ⁇ m.
  • a method for making a coal water slurry comprises milling smaller coal particles in a range of from about 20wt% to about 90wt% of the coal in the coal water slurry and comprising a mean particle size smaller than 26 ⁇ m, milling larger coal particles in a range of from about 10wt% to about 80wt% of the coal in the coal water slurry and comprising a mean particle size in a range of from 50 ⁇ m to 200 ⁇ m, and mixing the smaller coal particles, the larger coal particles, and water.
  • FIG. 1 illustrates a schematic diagram of a particle size distribution of coal for producing a coal water slurry in accordance with one embodiment of the invention.
  • the term "coal water slurry” may indicate a mixture of certain amounts of coal, water and additives for producing energy used in generating electricity, heating, support processing, and manufacturing.
  • use of coal water slurry has become an alternative to use of conventional fuel oil and coal.
  • a coal water slurry may comprise from about 55wt% to about 70wt% of coal particles, from about 30wt% to about 45wt% of water, and less than about 1wt% of additives. It should be noted that embodiments of the invention do not limit to any particular type of coal or additives for the coal water slurry.
  • additives include alkylnaphthelene sulfonate and polyoxyalkylene alkyl ether.
  • coal concentration in the coal water slurry it is desirable to increase the coal concentration in the coal water slurry so as to improve gasification efficiency and reduce consumption of coal and oxygen.
  • Higher coal concentration may be produced by pulverizing coal into a suitable particle size distribution while selecting suitable additives and appropriately mixing the coal, water and additives to manufacture the coal water slurry with suitable concentration, viscosity, stability, and quality.
  • the coal particle size distribution in the coal water slurry may be selected so that smaller coal particles are dispersed into spaces between larger coal particles so as to increase the coal concentration in the coal water slurry.
  • the particle size distribution of the coal 10 for producing the coal water slurry may comprise smaller coal particles 12 in a range of from about 20wt% to about 90wt% of a weight of the coal 10 and having a mean particle size smaller than about 26 ⁇ m, and larger coal particles 11 in a range of from about 10wt% to about 80wt% of the weight of the coal 10 and having a mean particle size in a range of from about 50 ⁇ m to about 200 ⁇ m.
  • the particle size distribution of the coal may comprise the small coal particles 12 in a range of from about 30wt% to about 90wt% and the larger coal particles 11 in a range of from about 10wt% to about 70wt% of the weight of the coal 10, respectively.
  • wt% means a weight percentage.
  • the particle size distribution of the coal 10 may comprise the small coal particles 12 in a range of from about 40wt% to about 90wt% and the larger coal particles 11 in a range of from about 10wt% to about 60wt% of the weight of the coal 10, respectively.
  • the particle size distribution of the coal 10 may comprise the small coal particles 12 in a range of from about 50wt% to about 75wt% and the larger coal particles 11 in a range of from about 25wt% to about 50wt% of the weight of the coal 10, respectively.
  • the smaller coal particles 12 may have a mean particle size smaller than about 25 ⁇ m, about 20 ⁇ m, or about 15 ⁇ m. In other examples, the smaller coal particles 12 may have a mean particle size smaller than about 10 ⁇ m or about 5 ⁇ m. In certain examples, the smaller coal particles 12 may have a mean in a range of from about 5 ⁇ m to about 15 ⁇ m. Alternatively, the smaller coal particles 12 may have a mean in a range of from about 10 ⁇ m to about 15 ⁇ m, or from 5 ⁇ m to about 10 ⁇ m.
  • the larger coal particles 11 may have a mean particle size in a range of from about 50 ⁇ m to about 70 ⁇ m, from about 70 ⁇ m to about 140 ⁇ m, from about 90 ⁇ m to about 140 ⁇ m, from about 100 ⁇ m to about 140 ⁇ m, or from about 140 ⁇ m to about 200 ⁇ m.
  • the smaller coal particles may be dispersed between the larger coal particles so as to increase the coal concentration of the coal water slurry to be produced.
  • the coal may comprise one or more of high rank coal, such as bituminous and anthracite, and low rank coal, such as sub-bituminous coal and lignite.
  • the coal particle distribution may comprise a mixture of the smaller low rank coal particles and the larger high rank coal particles, or the smaller high rank coal particles and the larger low rank coal particles.
  • both types of coal particles comprise low rank coal, such as the sub-bituminous coal and the lignite. Since the cost of low rank coal is lower, it may be cost-effective in some examples to produce the coal water slurry having higher coal concentration using the low rank coal.
  • Table-1 illustrates an experimental example of the coal particle size distribution for producing a coal water slurry in accordance with one embodiment.
  • the coal comprises a low rank coal.
  • Table-1 Coal particle size distribution Mesh Particle size ( ⁇ m) Weight percentage (wt%) >8 >2500 0 8-14 1400-2500 3 14-40 850-1400 12 40-325 45-850 60 325-540 26-45 12.5 ⁇ 540 ⁇ 26 50
  • the coal comprises about 50wt% of the smaller coal particles and about 50wt% of the larger coal particles.
  • Particle sizes of the smaller coal particles are less than 26 ⁇ m, and particle sizes of the larger coal particles in the range of from about 26 ⁇ m to about 2500 ⁇ m.
  • the smaller coal particles have a mean particle size smaller than 26 ⁇ m.
  • the larger coal particles have a mean particle size in a range of from about 50 ⁇ m to about 200 ⁇ m based on distribution of the weight percentages and the particle sizes thereof, as mentioned above.
  • FIG. 2 is an experimental diagram illustrating comparison of correlations of the coal concentration in the coal water slurry and viscosity with and without the smaller coal particles in the coal particle size distribution in accordance with one embodiment. As illustrated in FIG. 2 , lines 13-14 illustrate the correlations of the coal water slurry concentration and the viscosity without and with the smaller coal particles, respectively.
  • the coal concentration in the coal water slurry is less than 46%. With the amount of the coal increasing, the coal concentration reaches about 50% at a point 16 where the viscosity there of is less than 600cp. However, during preparation of the coal water slurry without the smaller coal particles, the flowability of the coal water slurry becomes worse at the point 16 such that it becomes disadvantageous to increase the coal concentration further in the coal water slurry.
  • the coal concentration in the coal water slurry reaches about 54%.
  • the coal concentration reaches above 56% at a point 18 where the viscosity thereof exceeds 1400cp.
  • a certain amount of the additives may be added to decrease the viscosity of the coal water slurry to about 1300cp at a point 19, which is suitable for the flowability of the coal water slurry.
  • the coal water slurry having the mixture of the smaller coal particles and the larger coal particles may have the higher coal concentration and higher flowability than the coal water slurry without mixture of the smaller coal particles.
  • FIGS. 3-6 illustrate schematic flow charts illustrating preparation of the coal water slurry in accordance with various embodiments of the invention. As illustrated in FIG. 3 , during preparation, according to a determined proportion of the smaller coal particles and the larger coal particles, certain amounts of starting coals 20, 21 are introduced into a coarse mill 22 and a fine mill 23 for milling, respectively.
  • one or more coarse mills 22 and one or more fine mills 23 may be employed although one coarse mill 22 and one fine mill 23 are illustrated in FIG. 3 .
  • the particle sizes of the starting coals 20, 21 may be less than 3mm. Although two starting coals 20, 21 are illustrated in FIG. 3 , one or more starting coal supply sources (not shown) may be employed to provide one or more starting coals 20, 21.
  • the coarse mill 22 is for wet milling of the starting coal 20 and the fine mill 23 is for dry milling of the starting coal 21.
  • the coarse mill 22 and the fine mill 23 may comprise ball mills, and the particle sizes of the starting coals 20, 21 may be different and not less than 3mm.
  • either or both of the starting coals 20, 21 may comprise one or two of the low rank coal and the high rank coal, and the starting coals 20, 21 may be the same or different from each other.
  • the starting coals 20, 21 are the same low rank coal.
  • the fine mill 23 mills the starting coal 21 to produce the dry smaller coal particles having a mean particle size less than about 26 ⁇ m.
  • determined amounts of water 24 and additives 25 are also introduced into the coarse mill 22 to produce a coarse coal water slurry comprising the large coal particles having a mean particle size in the range of from about 50 ⁇ m to about 200 ⁇ m.
  • the dry smaller coal particles from the fine mill 23 and the coarse coal water slurry from the coarse mill 22 are introduced into a mixing vessel 26 for mixing to produce the coal water slurry with higher concentration for further processing, for example, for introduction into a gasifier 27 to produce energy.
  • a mixer (not shown) may be employed to mix the dry smaller coal particles and the coarse coal water slurry within the mixing vessel 26, and feed rates of the dry smaller coal particles may be controlled into the mixing vessel 26 so as to ensure the water in the coarse coal water slurry to contact with the smaller coal particles and the smaller coal particles to disperse between the larger coal particles.
  • a filter 28 may be employed to receive and filter the coal water slurry from the mixing vessel 26 to remove impurities, such as rock in the coal water slurry, which is advantageous for processing of the coal water slurry in a gasifier.
  • the filter 28 may not be employed.
  • FIG. 4 illustrates a schematic flow chart of the preparation of the coal water slurry in accordance with another embodiment of the invention.
  • the arrangement in FIG. 4 differs from the arrangement in FIG. 3 in that the mixing vessel 26 in FIG. 3 is not employed in the arrangement in FIG. 4 .
  • the dry smaller coal particles from the fine mill 23 are introduced into the coarse mill 22 to mix with the larger coal particles, water and the additives while the starting coal 20 is milled in the coarse mill 22.
  • a mixing vessel may also be employed behind the coarse mill 22.
  • a filter 28 may optionally be used before the coal water slurry is sent to the gasifier 27.
  • FIG. 5 illustrates a schematic flow chart of the preparation of the coal water slurry in accordance with yet another embodiment of the invention.
  • certain amounts of water 29 and optionally additives 30 are also introduced into the fine mill 23 while the starting coal 21 is milled in the fine mill 23 to mix with the smaller coal particles.
  • one or more water supply sources and one or more additive supply sources may be employed to provide the water 24, 29 and the additives 25, 30 respectively.
  • the water 24, 29 and the additives 25, 30 may be the same or different from each other.
  • the additives 25 and/or 30 may only be introduced into one of the mills or may be introduced into the mixing vessel 26.
  • all of the starting coal 31 is introduced into the coarse mill 22 for wet milling.
  • a certain amount of a coarse coal 32 from the coarse mill 22 is introduced into the mixing vessel 26, which acts as the larger coal particles, and another amount of the coarse coal from the coarse mill 22 flows into the fine mill 23 for further wet milling to produce the smaller coal particles.
  • the smaller coal particles are mixed with the larger coal particles from the coarse mill 22 in the mixing vessel 26 to produce the coal water slurry with higher concentration.
  • certain amounts of water and additives may be added into either of the mills or into the mixing vessel.
  • from about 20wt% to about 90wt% of the smaller coal particles 12 having a mean particle size smaller than 25um may be mixed with from about 10wt% to about 80wt% of larger coal particles 11 having a mean particle size in the range of from about 50 ⁇ m to about 140 ⁇ m so as to produce the coal water slurry with higher coal concentration.
  • low rank coal may be used to produce the coal particle size distribution so as to produce the coal water slurry with higher coal concentration, which is cost effective.
  • wet milling and/or dry milling may be employed so as to improve system flexibility to produce the coal water slurry.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)
EP12163250A 2011-04-07 2012-04-04 Boue de charbon et procédés de fabrication de boue de charbon Withdrawn EP2508589A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011100857209A CN102732341A (zh) 2011-04-07 2011-04-07 水煤浆及其制备方法

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US (1) US20120255221A1 (fr)
EP (1) EP2508589A1 (fr)
KR (1) KR20120115473A (fr)
CN (1) CN102732341A (fr)
CA (1) CA2773735A1 (fr)
IN (1) IN2012DE01038A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104927947A (zh) * 2014-03-19 2015-09-23 通用电气公司 处理水煤浆的方法与装置、及相应系统
CN107164005A (zh) * 2017-06-22 2017-09-15 中煤科工清洁能源股份有限公司 一种水煤浆及其制备方法
CN107267235A (zh) * 2017-06-27 2017-10-20 中煤科工清洁能源股份有限公司 一种多原料制备新型水煤浆产品的方法
CN111534342A (zh) * 2020-04-27 2020-08-14 深圳瑞科天启科技有限公司 一种高浓度水煤浆及其制备方法和用途
US20220213397A1 (en) * 2019-02-04 2022-07-07 Eastman Chemical Company Gasification of plastics and solid fossil fuels to produce organic compounds

Families Citing this family (7)

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Publication number Priority date Publication date Assignee Title
CN103965981B (zh) * 2013-01-31 2016-05-25 通用电气公司 制备水煤浆的装置与方法
CN103937568B (zh) * 2014-04-17 2016-03-02 中国五环工程有限公司 高含氧量煤制备高浓度水煤浆方法
KR101582537B1 (ko) 2014-05-19 2016-01-06 한국에너지기술연구원 석탄 슬러리 및 그의 점도 조절 방법
CN104031702B (zh) * 2014-06-19 2017-01-04 无锡市恒烽水煤浆有限公司 高浓度混合水煤浆
CN107502395B (zh) * 2017-09-07 2019-03-08 江苏天脉化工有限公司 一种水煤浆的制备方法
CN113560012A (zh) * 2021-06-29 2021-10-29 江苏恒丰能环科技股份有限公司 一种改变棒磨机制浆粒度分布方法
CN114133966B (zh) * 2021-10-29 2023-05-02 江苏地质矿产设计研究院(中国煤炭地质总局检测中心) 基于粒度分布模型制备成浆性好的低阶煤水煤浆的方法

Citations (5)

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US4479806A (en) * 1978-11-02 1984-10-30 Alfred University Research Foundation, Inc. Stabilized slurry and process for preparing same
US4549881A (en) * 1982-05-07 1985-10-29 Ab Carbogel Aqueous slurry of a solid fuel and a process and means for the production thereof
EP0223755A2 (fr) * 1985-11-12 1987-05-27 Ab Carbogel Composition d'une suspension charbon-eau basée sur des solides carbonés de qualité inférieure
US5599356A (en) * 1990-03-14 1997-02-04 Jgc Corporation Process for producing an aqueous high concentration coal slurry
US20100024282A1 (en) * 2008-06-30 2010-02-04 Joseph Daniel D Nano-dispersions of coal in water as the basis of fuel related technologies and methods of making same

Family Cites Families (1)

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Publication number Priority date Publication date Assignee Title
JP2603127B2 (ja) * 1989-03-17 1997-04-23 日揮 株式会社 高濃度石炭・水スラリ−を製造する方法

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
US4479806A (en) * 1978-11-02 1984-10-30 Alfred University Research Foundation, Inc. Stabilized slurry and process for preparing same
US4549881A (en) * 1982-05-07 1985-10-29 Ab Carbogel Aqueous slurry of a solid fuel and a process and means for the production thereof
EP0223755A2 (fr) * 1985-11-12 1987-05-27 Ab Carbogel Composition d'une suspension charbon-eau basée sur des solides carbonés de qualité inférieure
US5599356A (en) * 1990-03-14 1997-02-04 Jgc Corporation Process for producing an aqueous high concentration coal slurry
US20100024282A1 (en) * 2008-06-30 2010-02-04 Joseph Daniel D Nano-dispersions of coal in water as the basis of fuel related technologies and methods of making same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104927947A (zh) * 2014-03-19 2015-09-23 通用电气公司 处理水煤浆的方法与装置、及相应系统
WO2015143122A1 (fr) * 2014-03-19 2015-09-24 General Electric Company Procédé et appareil pour le traitement d'une suspension épaisse charbon-eau
CN107164005A (zh) * 2017-06-22 2017-09-15 中煤科工清洁能源股份有限公司 一种水煤浆及其制备方法
CN107267235A (zh) * 2017-06-27 2017-10-20 中煤科工清洁能源股份有限公司 一种多原料制备新型水煤浆产品的方法
US20220213397A1 (en) * 2019-02-04 2022-07-07 Eastman Chemical Company Gasification of plastics and solid fossil fuels to produce organic compounds
US20220275298A1 (en) * 2019-02-04 2022-09-01 Eastman Chemical Company Gasification of plastics and solid fossil fuels
US11939546B2 (en) * 2019-02-04 2024-03-26 Eastman Chemical Company Gasification of plastics and solid fossil fuels to produce organic compounds
US11939547B2 (en) * 2019-02-04 2024-03-26 Eastman Chemical Company Gasification of plastics and solid fossil fuels
CN111534342A (zh) * 2020-04-27 2020-08-14 深圳瑞科天启科技有限公司 一种高浓度水煤浆及其制备方法和用途

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Publication number Publication date
KR20120115473A (ko) 2012-10-18
IN2012DE01038A (fr) 2015-07-24
US20120255221A1 (en) 2012-10-11
CA2773735A1 (fr) 2012-10-07
CN102732341A (zh) 2012-10-17

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