WO2015143122A1 - Procédé et appareil pour le traitement d'une suspension épaisse charbon-eau - Google Patents

Procédé et appareil pour le traitement d'une suspension épaisse charbon-eau Download PDF

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Publication number
WO2015143122A1
WO2015143122A1 PCT/US2015/021407 US2015021407W WO2015143122A1 WO 2015143122 A1 WO2015143122 A1 WO 2015143122A1 US 2015021407 W US2015021407 W US 2015021407W WO 2015143122 A1 WO2015143122 A1 WO 2015143122A1
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WO
WIPO (PCT)
Prior art keywords
stream
water slurry
coal
coal water
additive
Prior art date
Application number
PCT/US2015/021407
Other languages
English (en)
Inventor
Liang YU
Dejia Wang
Judith Pauline OPPENHEIM
Junli Xue
Xijing Bi
Raul Eduardo Ayala
Original Assignee
General Electric Company
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Filing date
Publication date
Application filed by General Electric Company filed Critical General Electric Company
Publication of WO2015143122A1 publication Critical patent/WO2015143122A1/fr

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Classifications

    • 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
    • F23K1/02—Mixing solid fuel with a liquid, e.g. preparing slurries
    • 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
    • C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0903—Feed preparation
    • C10J2300/0906—Physical processes, e.g. shredding, comminuting, chopping, sorting
    • 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
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/093—Coal
    • 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
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/18—Organic compounds containing oxygen
    • C10L1/192—Macromolecular compounds
    • C10L1/198—Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds homo- or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon to carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid
    • C10L1/1985—Macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds homo- or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon to carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid polyethers, e.g. di- polygylcols and derivatives; ethers - esters
    • 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
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/24—Organic compounds containing sulfur, selenium and/or tellurium
    • C10L1/2431—Organic compounds containing sulfur, selenium and/or tellurium sulfur bond to oxygen, e.g. sulfones, sulfoxides
    • C10L1/2437—Sulfonic acids; Derivatives thereof, e.g. sulfonamides, sulfosuccinic acid esters
    • 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
    • C10L1/10—Liquid carbonaceous fuels containing additives
    • C10L1/14—Organic compounds
    • C10L1/24—Organic compounds containing sulfur, selenium and/or tellurium
    • C10L1/2462—Organic compounds containing sulfur, selenium and/or tellurium macromolecular compounds
    • 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
    • C10L2250/06—Particle, bubble or droplet size
    • 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
    • C10L2290/14—Injection, e.g. in a reactor or a fuel stream during fuel production
    • C10L2290/141—Injection, e.g. in a reactor or a fuel stream during fuel production of additive or catalyst
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2201/00—Pretreatment of solid fuel
    • F23K2201/50—Blending
    • F23K2201/503—Blending with non-combustible liquids to prepare slurries
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23K—FEEDING FUEL TO COMBUSTION APPARATUS
    • F23K2201/00—Pretreatment of solid fuel
    • F23K2201/50—Blending
    • F23K2201/505—Blending with additives

Definitions

  • This invention relates generally to methods and apparatuses for processing coal water slurries, and associated systems.
  • Coal water slurries are widely used these days in areas such as the gasification industry. Sometimes, fine coal water slurries comprising fine coal particles are needed. If fine coal particles are provided before mixing with water for preparing the fine coal water slurry, there may be auto-ignition or explosion potentials while grinding and handling the fine dry coal particles. In addition, the agglomeration of fine dry coal particles may occur while mixing with water, which is bad for the performance of the coal water slurry.
  • Fine coal water slurries also called coal suspensions, may exhibit physical properties, such as being more stable towards sedimentation, that help in the preparation of higher concentration slurries.
  • a method for processing coal water slurry comprises: providing a first stream of coal water slurry comprising coal particles of a first average size; providing a first stream of additive; and processing the first stream of coal water slurry and the first stream of additive to produce a second stream of coal water slurry comprising coal particles of a second average size smaller than the first average size.
  • an apparatus for processing coal water slurry comprises: a first inlet for receiving a first stream of coal water slurry; a second inlet for receiving a first stream of additive; a processing element for processing the first stream of coal water slurry and the first stream of additive to produce a second stream of coal water slurry; and an outlet for outputting the second stream of coal water slurry.
  • a system comprises: the apparatus described in the above paragraph; a first unit for providing a third stream of coal water slurry comprising the first stream of coal water slurry and a fourth stream of coal water slurry; a second unit for providing a stream of dry coarse coal particles; and a mixing unit for mixing the stream of dry coarse coal particles, the second stream of coal water slurry and the fourth stream of coal water slurry to produce a fifth stream of coal water slurry.
  • FIG. 1 is a schematic diagram of an apparatus for processing a coal water slurry in accordance with a first embodiment of the present invention
  • FIG. 2 is a schematic diagram of an apparatus for processing a coal water slurry in accordance with a second embodiment of the present invention
  • FIG. 3 is a schematic diagram of an apparatus for processing a coal water slurry in accordance with a third embodiment of the present invention.
  • FIG. 4 is a schematic diagram of an apparatus for processing a coal water slurry in accordance with a fourth embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a system in accordance with a fifth embodiment of the present invention.
  • Approximating language may be applied to modify any quantitative representation that could permissibly vary, without resulting in a change in the basic function to which it is related. Accordingly, a value modified by a term or terms, such as "about”, is not limited to the precise value specified. In some instances, the approximating language may correspond to the precision of an instrument for measuring the value.
  • the term "or" is not meant to be exclusive and refers to at least one of the referenced components (for example, a material) being present and includes instances in which a combination of the referenced components may be present, unless the context clearly dictates otherwise.
  • FIGS. 1-4 illustrate schematic diagrams of apparatuses 10-40 in accordance with embodiments of the invention for processing coal water slurries.
  • the apparatus 10, 20, 30, 40 comprises a first inlet 11, 21, 31, 41 for receiving a first stream of coal water slurry 12, 22, 32, 42; a second inlet 14, 24, 34, 44 for receiving a first stream of additive 15, 25, 35, 45 from an additive tank 16, 26, 36, 46; a processing element 17, 27, 37, 47 for processing the first stream of coal water slurry 12, 22, 32, 42 and the first stream of additive 15, 25, 35, 45 to produce a second stream of coal water slurry 19, 29, 39, 49; and an outlet 18, 28, 38, 48 for outputting the second stream of coal water slurry 19, 29, 39, 49.
  • the first inlet may be on the side wall of the processing element, as is shown in FIGS. 1-3, or in the bottom wall of the processing element (not shown).
  • the second inlet 14 may be located in the bottom wall of the processing element 17 as is shown in FIG. 1.
  • the second inlet 24 may be located in the side wall of the processing element 27 as is shown in FIG. 2.
  • the second inlet 34 may comprise a first part 340 located in the bottom wall of the processing element 37 and a second part 341 located in the side wall of the processing element 37, as is shown in FIG. 3.
  • the second inlet may be located in an upper section of the processing element.
  • the outlet 18, 28, 38, 48 is located in an upper section of the processing element 17, 27, 37, 47.
  • the apparatus 40 comprises a buffer tank 400 and a third inlet 401.
  • the first and the second inlets 41, 44 are located on the buffer tank 400.
  • the first stream of coal water slurry 42 and the first stream of additive 45 from the additive tank 46 are mixed in the buffer tank 400 before being processed in the processing element 47.
  • the third inlet 401 is located on the processing element 47 for receiving the mixture of the first stream of coal water slurry 42 and the first stream of additive 45, i.e., the stream of coal water slurry 403, from the buffer tank 400.
  • an agitator 402 may be incorporated in the buffer tank 400 for enhancing the mixing of the first stream of coal water slurry 42 and the first stream of additive 45.
  • the term "coal water slurry” may indicate a mixture of certain amounts of coal, water and optionally other material for producing energy used in generating electricity, heating, support processing, and manufacturing.
  • Non-limiting examples of other material comprise alkylnaphthalene sulfonate, polyoxyalkylene alkyl ether, ammonium lignosulfonates (ALS), sodium lignosulfonate, sodium salt of naphthalene sulfonate polymerized with formaldehyde, polycondensate esters of sulfonic acid, polyethylene-oxide (PEO) derived surfactants and dispersants such as humic acid based dispersants, polyolefm sulfonate based dispersants, and polycarboxylate based dispersants.
  • Some other material such as the coal water slurry additive FP (Q/GHBC202- 2003) commercially available from Shanghai Coking and Chemical Co., Shanghai, China, comprises a
  • the concentration of coal and other material in the coal water slurry may be dependent upon the type of coal, which also relates to the flowability and viscosity of the coal water slurry. Usually, with acceptable flowability and viscosity, a high coal concentration is desired.
  • the coal water slurry may comprise from about 45wt% to about 70wt% of coal particles, from about 30wt% to about 55wt% of water, and optionally a certain amount, for example less than about lwt% of other material. It should be noted that embodiments of the invention do not limit to any particular types and amounts of coal or other material for the coal water slurry.
  • the first stream of additive comprises a viscosity reduction material, or a flowability (pourability) enhancing material.
  • the viscosity reduction material may be the same as or different from the flowability (pourability) enhancing material.
  • the first stream of additive comprises water, alkylnaphthalene sulfonate, polyoxyalkylene alkyl ether, ammonium lignosulfonates (ALS), sodium lignosulfonate, sodium salt of naphthalene sulfonate polymerized with formaldehyde, polycondensate esters of sulfonic acid, polyethylene-oxide (PEO) derived surfactants, or dispersants such as humic acid based dispersants, polyolefm sulfonate based dispersants, and polycarboxylate based dispersants.
  • ALS ammonium lignosulfonates
  • PEO polyethylene-oxide
  • dispersants such as humic acid based dispersants, polyolefm sulfonate based dispersants, and polycarboxylate based dispersants.
  • the amount of the first stream of additive may be dependent upon the desired coal concentration, flowability (and/or viscosity) of the second stream of coal water slurry.
  • water may be the first stream of additive to decrease the concentration of coal in the first stream of coal water slurry in a range of less than about 5%.
  • other material may be the first stream of additive and increase the concentration of other material in the second stream of coal water slurry to be about 1%.
  • the first stream of coal water slurry has the following particle size distribution (PSD): first coal particles in a range of from about 20 wt% to about 50 wt% of the coal in the coal water slurry and having particle sizes (diameters) smaller than 44 ⁇ , second coal particles in a range of from about 20 wt% to about 70 wt% of the coal in the coal water slurry and having particle sizes (diameters) in a range of from about 44 ⁇ to about 420 ⁇ , and third coal particles in a range of from 10 wt% to about 40 wt% of the coal in the coal water slurry and having particle sizes (diameters) greater than about 420 ⁇ .
  • PSD particle size distribution
  • the first stream of coal water slurry 12, 22, 32, 42 comprises coal particles having a maximum particle size (diameter) of less than about 1500 ⁇ and an average particle size (diameter) (d50) of greater than about 100 ⁇ .
  • the first coal particles may be in range of from about
  • the second coal particles may be in a range of from about 30 wt% to about 60 wt% of the weight of the coal in the first stream of coal water slurry.
  • the third coal particles may be in a range of from about 20 wt% to about 30 wt% of the weight of the coal in the first stream of coal water slurry.
  • the first coal particles may be in a range of from about 30 wt% to about 40 wt% of the weight of the coal in the first stream of coal water slurry.
  • the second coal particles may have the particle sizes in a range of from about 75 ⁇ to about 250 ⁇ .
  • the third coal particles may have the particle sizes in a range of from about 600 ⁇ to about 850 ⁇ . Additionally, the second coal particles may have the particle sizes in a range of from about 150 ⁇ to about 250 ⁇ .
  • the processing element 17, 27, 37, 47 may be any construction, configuration or structure that processes a first stream of coal water slurry to obtain a second stream of coal water slurry with reduced coal particle sizes compared to the first stream of coal water slurry.
  • the processing element comprises an attritor mill.
  • the processing element comprises a vibrating mill or a roller grinding mill.
  • the second stream of coal water slurry comprises coal particles having an average particle size (diameter, d50) smaller than about 40 ⁇ , about 35 ⁇ , or about 20 ⁇ .
  • FIG. 5 illustrates a schematic diagram of a system 100 in accordance with a fifth embodiment of the present invention.
  • the system 100 comprises: an apparatus 101; a first unit 102 for providing a third stream of coal water slurry 103 comprising the first stream of coal water slurry 104 and a fourth stream of coal water slurry 105; a second unit 106 for providing a stream of dry coarse coal particles 107; and a mixing unit 108 for mixing the stream of dry coarse coal particles 107, the second stream of coal water slurry 109 and the fourth stream of coal water slurry 105 to produce a fifth stream of coal water slurry 110.
  • the apparatus 101 may comprise any single or combination of the apparatus 10, 20, 30, 40. Therefore, the first stream of coal water slurry 104 may comprise any single of combination of the first stream of coal water slurry 12, 22, 32, 42 and the second stream of coal water slurry 109 may comprise any single or combination of the second stream of coal water slurry 19, 29, 39, 49.
  • coal (not shown), water (not shown) and optionally other material are provided to a mill, such as a wet rod mill, to prepare the third stream of coal water slurry 103.
  • the slurry provider 13, 23, 33, 43 may be a slurry tank or a wet mill, such as a wet rod mill, for providing the first stream of coal water slurry 12, 22, 32, 42.
  • the slurry provider 13, 23, 33, 43 is the first unit 102.
  • coal (not shown) is provided to a dry mill, e.g. a ball mill, or a dry crusher, to prepare the stream of dry coarse coal particles 107.
  • the stream of dry coarse coal particles 107 comprises coal particles having a maximum particle diameter of less than about 1500 ⁇ and an average particle diameter of greater than about 100 ⁇ .
  • one or more mills or crushers may be employed in each of the first unit 102, the second unit 106, and the apparatus 101.
  • the coal used herein 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 may comprise a mixture of the low-rank coal particles and the high-rank coal particles.
  • the coal comprises low-rank coal particles, 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.
  • the particle sizes of the coal may be smaller than about 3 mm. Alternatively, the particle sizes of the coal may be different from each other and greater than about 3 mm.
  • One or more coal supply sources may be employed to provide the coal.
  • the stream of dry coarse coal particles 107, the second stream of coal water slurry 109 and the fourth stream of coal water slurry 105 are mixed in the mixing unit 108 at appropriate ratios to produce the fifth stream of coal water slurry 110.
  • the coal from the fourth stream of coal water slurry 105 is greater than about 30 wt% of coal of the fifth stream coal water slurry 110.
  • the coal from the second stream of coal water slurry 109 is less than about 30 wt% of coal of the fifth stream of coal water slurry 110.
  • the particle size distribution of the fourth stream of coal water slurry 105, the second stream of coal water slurry 109 and the stream of dry coarse coal particles 107 may be analyzed, for example, by a laser particle size distribution (PSD) analyzer for the determination of the amounts of the fourth stream of coal water slurry 105, the second stream of coal water slurry 109 and the stream of dry coarse coal particles 107.
  • PSD laser particle size distribution
  • a mixer (not shown) may be employed to mix the fourth stream of coal water slurry 105, the second stream of coal water slurry 109 and the stream of dry coarse coal particles 107 within the mixing unit 108, and feed rates of the fourth stream of coal water slurry 105, the second stream of coal water slurry 109 and the stream of dry coarse coal particles 107 may be controlled for introduction into the mixing unit 108 so as to ensure the water in the fourth stream of coal water slurry 105 and the second stream of coal water slurry 109 will contact with the dry coal particles 107 and the relatively smaller coal particles will be dispersed between the relatively larger coal particles.
  • the fifth stream of coal water slurry 110 may be sent to a combustion unit (not shown), e.g., a gasifier.
  • a combustion unit e.g., a gasifier.
  • the first stream of additive 15, 25, 35, 45 helps to process the first stream of coal water slurry 12, 22, 32, 42 to obtain the second stream of coal water slurry 19, 29, 39, 49 with reduced coal particle sizes and acceptable viscosity/flowability.
  • the coal particles having the relatively smaller particle sizes may be dispersed between the coal particles having the relatively larger particle sizes so as to increase the coal concentration of the fifth stream coal water slurry 110 to be prepared.
  • the stream of dry coarse coal particles 107 may absorb the extra water in the fourth stream of coal water slurry 105 and the second stream of coal water slurry 109, which further improves the coal concentration of the fifth stream of coal water slurry 110.
  • a stream of coarse coal water slurry produced by a rod mill had a particle size distribution (PSD) shown in table 1 below and was introduced into an attritor mill.
  • PSD particle size distribution
  • the weight percentage of coal and a coal water slurry additive (FP (Q/GHBC202-2003) from Shanghai Coking and Chemical Co., Shanghai, China) in the coarse coal water slurry were respectively 52.5% and 0.5%.
  • a stream of coarse coal water slurry the same as the one of comparative example 1 was blended with water in a buffer tank for about 1 hour to obtain a stream of coal water slurry in which the weight percentage of coal and the coal water slurry additive were respectively 51% and 0.5%.
  • a stream of coarse coal water slurry the same as the one of comparative example 1 was blended with the coal water slurry additive in a buffer tank for about 1 hour to obtain a stream of coal water slurry in which the weight percentage of coal and the coal water slurry additive were respectively 52.5% and 0.8%.
  • the stream of coal water slurry obtained from the buffer tank was introduced to the attritor mill of example 1 from an inlet in the lower portion of the attritor mill. It was observed that the flowability in the feeding pipe line was good and a stream of fine coal water slurry (d50: about 35 ⁇ ) was discharged smoothly from the outlet in the upper portion of the attritor mill. The viscosity of the fine coal water slurry was about 1213 cp.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Liquid Carbonaceous Fuels (AREA)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

Cette invention concerne un procédé de traitement d'une suspension épaisse charbon-eau comprenant : l'utilisation d'un premier flux de suspension épaisse charbon-eau comprenant des particules de charbon ayant une première taille moyenne; l'utilisation d'un premier flux d'additif; et le traitement du premier flux de suspension épaisse charbon-eau et du premier flux d'additif pour obtenir un second flux de suspension épaisse charbon-eau comprenant des particules de charbon ayant une seconde taille moyenne inférieure à la première. Un appareil et un système associés sont en outre décrits.
PCT/US2015/021407 2014-03-19 2015-03-19 Procédé et appareil pour le traitement d'une suspension épaisse charbon-eau WO2015143122A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410103868.4A CN104927947A (zh) 2014-03-19 2014-03-19 处理水煤浆的方法与装置、及相应系统
CN201410103868.4 2014-03-19

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WO2015143122A1 true WO2015143122A1 (fr) 2015-09-24

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111057586A (zh) * 2019-12-17 2020-04-24 北京航化节能环保技术有限公司 一种水煤浆气化烧嘴系统

Citations (4)

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