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US20090280442A1 - Device And Method Of Combusting Solid Fuel With Oxygen - Google Patents

Device And Method Of Combusting Solid Fuel With Oxygen Download PDF

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Publication number
US20090280442A1
US20090280442A1 US12/435,579 US43557909A US2009280442A1 US 20090280442 A1 US20090280442 A1 US 20090280442A1 US 43557909 A US43557909 A US 43557909A US 2009280442 A1 US2009280442 A1 US 2009280442A1
Authority
US
United States
Prior art keywords
conduit
stream
oxygen
ballast gas
gas flow
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.)
Abandoned
Application number
US12/435,579
Other languages
English (en)
Inventor
Rajani Kanth Varagani
Patrick Jean-Marie Recourt
Remi Pierre Tsiava
Xulin Sun
Brenice Belasse
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.)
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
American Air Liquide Inc
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 American Air Liquide Inc filed Critical American Air Liquide Inc
Priority to PCT/IB2009/051844 priority Critical patent/WO2009136366A2/fr
Priority to US12/435,579 priority patent/US20090280442A1/en
Assigned to AMERICAN AIR LIQUIDE, INC. reassignment AMERICAN AIR LIQUIDE, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VARAGANI, RAJANI KANTH
Assigned to L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE reassignment L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SUN, XULIN, BELASSE, BRENICE, TSIAVA, REMI PIERRE, RECOURT, PATRICK JEAN-MARIE
Publication of US20090280442A1 publication Critical patent/US20090280442A1/en
Assigned to L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE reassignment L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMERICAN AIR LIQUIDE. INC.
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
    • F23C9/003—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for pulverulent fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
    • F23L7/007—Supplying oxygen or oxygen-enriched air
    • 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
    • Y02E20/00—Combustion technologies with mitigation potential
    • Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Definitions

  • This invention relates to a method combusting solid fuel with oxygen.
  • one proposed solution is to reinject flue gas produced by the said combustion or another combustion to partly make up for the absence of nitrogen. This procedure serves to avoid a high production of NO x due both to the absence of nitrogen, and also to a lower flame temperature than in all-oxygen combustion.
  • the reinjected flue gas often nullifies the benefits of oxycombustion, such as, in particular, lower downstream flue gas treatment, efficiency increase due to high temperature combustion process etc.
  • Coal is a major source of fuel in the world. Different devices and methods are available today to combust coal. Coal is usually combusted with air or with a mixture of oxygen and flue gases (‘synthetic air’). Prior art exists today where oxygen is mixed with flue gas and introduced into the combustor. Separate injection of fuel, oxygen, and flue gas have been proposed for gaseous and liquid fuels, where the mixing of fuel and oxidants are relatively easy. Also, there is no conveying media required to transport gaseous or liquid fuels, whereas such a conveying media is required for a solid fuel combustion.
  • Synthetic air requires mixing of oxygen with flue gases and there is less flexibility with respect to the oxygen to flue gas ratio (typically about 18% to about 40%) due to safety and technical issues. Synthetic air also dilutes the combustion which makes it difficult to burn low quality coal.
  • the present invention is a method of combustion of a solid fuel stream with oxygen.
  • the present invention includes introducing a first stream, comprising a first portion of substantially pure oxygen, into a first conduit.
  • the present invention includes introducing a second stream, comprising a solid fuel stream and a conveying media, into a second conduit, wherein said second conduit is concentric with, and surrounding, said first conduit.
  • the present invention includes introducing a third stream, comprising a second portion of substantially pure oxygen, into a third conduit, wherein said third conduit is concentric with, and surrounding, said first conduit and said second conduit.
  • the present invention includes igniting said first stream, said second stream, and said third stream as they exit said first conduit, said second conduit and said third conduit, in such a way as to create a flame.
  • the present invention includes introducing a fourth stream, comprising a first portion of ballast gas, into a fourth conduit, wherein said fourth conduit is concentric with, and surrounding, said first conduit, said second conduit, and said third conduit.
  • the present invention includes introducing a fifth stream, comprising a second portion of ballast gas, into a fifth conduit, wherein said fifth conduit is concentric with, and surrounding, said first conduit, said second conduit, said third conduit and said fourth conduit.
  • the present invention includes surrounding said with said fourth stream and said fifth stream, as they exit said fourth conduit and said fifth conduit.
  • FIG. 1 is a schematic representation of one embodiment of the present invention.
  • FIG. 2 is a schematic representation of another embodiment of the present invention, indicating the fourth stream being divergent and the fifth stream being convergent.
  • FIG. 3 is a schematic representation of another embodiment of the present invention, indicating the swirling devices in the fourth and fifth streams, as well as the dampers.
  • FIG. 4 is a schematic representation of another embodiment of the present invention, indicating the control system and swirling devices in the 2 nd stream.
  • the proposed method detaches the oxygen and flue gas introduction and improves the flexibility of having a broad range to the oxygen to flue gas ratio.
  • the proposed method takes advantage of oxycombustion to generate high temperatures, thereby accelerating the devolatilization of coal and thus the combustion of the coal. This dilution happens only after the combustion with pure oxygen to maintain the required furnace wall temperature.
  • the present invention proposes an innovative device and method to combust solid fuel such as coal with pure oxygen.
  • Fuel, oxygen, and flue gases are introduced separately into the boiler via the proposed device/burner.
  • This device enables independent flow control of flue gas and oxygen compared to the state of the art, where oxygen and flue gas are mixed then introduced.
  • the proposed method enhances the devolatilization of fuel with the use of pure oxygen and thus improves the combustion process. This promotes the utilization of low quality coals which are difficult to burn with air or synthetic air with existing technologies.
  • injector 100 is presented.
  • Coal is introduced through coal pipe 102 (second stream) of the burner, with a conveying media, preferably recycled flue gas (either alone or combined with oxygen).
  • the coal may be injected with or without inducing a swirl, depending on the quality of the coal, flame length required etc.
  • a first portion of the substantially pure oxygen is introduced through lance 101 (first stream), to improve the flame stability.
  • a second portion of substantially pure oxygen is introduced into oxygen orifice 103 (third stream).
  • Oxygen orifice 103 (third stream) surrounds coal pipe 102 (second stream) and is introduced to facilitate the complete combustion of coal in an oxygen environment.
  • First recycled flue gas stream 104 (fourth stream) and second recycled flue gas stream 105 (fifth stream) are introduced on the outer perimeter of oxygen orifice 103 (third stream), thereby maintaining the furnace temperature to an acceptable level.
  • the oxyflame is diluted to the required extent with recycled flue gases ( 104 , 105 ) (fourth stream and fifth stream) around the pure oxygen injection ( 103 ).
  • injector 200 is presented.
  • Coal is introduced through coal pipe 202 (second stream) of the burner, with a conveying media, preferably recycled flue gas (either alone or combined with oxygen).
  • the coal may be injected with or without inducing a swirl, depending on the quality of the coal.
  • a first portion of the substantially pure oxygen is introduced through lance 201 (first stream), to improve the flame stability.
  • a second portion of substantially pure oxygen is introduced into oxygen orifice 203 (third stream).
  • Oxygen orifice 203 (third stream) surrounds coal pipe 202 (second stream) and is introduced to facilitate the complete combustion of coal in an oxygen environment.
  • First recycled flue gas stream 204 (fourth stream) and second recycled flue gas stream 205 (fifth stream) are introduced on the outer perimeter of oxygen orifice 203 (third stream), thereby maintaining the furnace temperature to an acceptable level.
  • the oxyflame is diluted to the required extent with recycled flue gases ( 204 , 205 ) (fourth stream and fifth stream) around the pure oxygen injection ( 203 ).
  • the flue gases ( 204 , 205 ) can be injected in a non-axial fashion as shown in FIG. 2 .
  • the majority of the flue gases are preferably injected at an angle that is divergent from the axial centreline CL of injector 200 , with a minor flow being injected at an angle that is convergent with the axial centreline CL.
  • injector 300 is presented.
  • Coal is introduced through coal pipe 302 (second stream) of the burner, with a conveying media, preferably recycled flue gas (either alone or combined with oxygen).
  • the coal may be injected with or without inducing a swirl, depending on the quality of the coal, flame length required etc.
  • a secondary fuel such as oil or gas may be injected along with the solid fuel into coal pipe 302 (second stream). It is also possible to valorize low quality secondary fuel when the solid fuel does not need the assistance of the secondary fuel (i.e. good quality solid fuel).
  • a first portion of the substantially pure oxygen is introduced through lance 301 (first stream), to improve the flame stability.
  • a second portion of substantially pure oxygen is introduced into oxygen orifice 303 (third stream).
  • Oxygen orifice 303 (third stream) surrounds coal pipe 302 (second stream) and is introduced to facilitate the complete combustion of coal in an oxygen environment.
  • First recycled flue gas stream 304 (fourth stream) and second recycled flue gas stream 305 (fifth stream) are introduced on the outer perimeter of oxygen orifice 303 (third stream) thereby maintaining the furnace temperature to an acceptable level.
  • First recycled flue gas stream 304 (fourth stream) may be introduced with a clockwise swirl A or a counter-clockwise swirl B.
  • Second recycled flue gas stream 305 (fifth stream) may be introduced with a clockwise swirl C or a counter-clockwise swirl D.
  • the oxyflame is diluted to the required extent with recycled flue gases ( 304 , 305 ) around the pure oxygen injection ( 303 ).
  • the flue gases ( 304 , 305 ) can be injected in a non-axial fashion as shown in FIG. 3 ?.
  • the majority of the flue gases are preferably injected at an angle that is divergent from the axial centreline CL of injector 300 , with a minor flow being injected at an angle that is convergent with the axial centreline CL.
  • swirl can be introduced into the flue gases ( 304 , 305 ).
  • opposite swirls are preferably induced in the two zones of flue gas injection by element 306 .
  • the flow between the two flue gas injection zones can be changed with damper 307 positioned between these zones.
  • injector 400 is presented.
  • Coal is introduced through coal pipe 402 (second stream) of the burner, with a conveying media, preferably recycled flue gas (either alone or combined with oxygen).
  • the coal may be injected with or without inducing a swirl, depending on the quality of the coal, flame length required etc.
  • a first portion of the substantially pure oxygen is introduced through lance 401 (first stream), to improve the flame stability.
  • a second portion of substantially pure oxygen is introduced into oxygen orifice 403 (third stream).
  • Oxygen orifice 403 (third stream) surrounds coal pipe 402 (second stream) and is introduced to facilitate the complete combustion of coal in an oxygen environment.
  • First recycled flue gas stream 404 (fourth stream) and second recycled flue gas stream 405 (fifth stream) are introduced on the outer perimeter of oxygen orifice 403 (third stream), thereby maintaining the furnace temperature to an acceptable level.
  • the oxyflame is diluted to the required extent with recycled flue gases ( 404 , 405 ) around the pure oxygen injection ( 403 ).
  • the flue gases ( 404 , 405 ) can be injected in a non-axial fashion as shown in FIG. 4 .
  • the majority of the flue gases are preferably injected at an angle that is divergent from the axial centreline CL of Injector 400 , with a minor flow being injected at an angle that is convergent with the axial centreline CL.
  • swirl can be introduced into the flue gases ( 404 , 405 ).
  • opposite swirls are preferably induced in the two zones of flue gas injection by element 406 .
  • the flow between the two flue gas injection zones can be changed with damper 407 positioned between these zones.
  • a control system 408 may automatically adjust the combustion disturbances that may be caused with changing quality of coal or other purturbences.
  • the staging of oxygen between lance 401 and surrounding the coal pipe 402 can be changed along with the distribution of recycled flue gases in the two surrounding zones ( 404 , 405 ).
  • the combustion characteristics can be measured by monitoring the flue gases ( 409 ) and the information then being fed to the control system.
  • the oxygen in another embodiment, in order to improve the efficiency of the combustion process, can be preheated to a higher temperature before introduction into the burner.
  • the heat source may be the flue gas exiting the boiler, or any other locally available heat source, or heat source that is part of the present process.
  • the oxygen streams ( 101 , 201 , 301 , 401 , 103 , 203 , 303 , 403 ) can be injected in many different ways such as, but not limited to, axial, radial, convergent, divergent, with and with out swirl or the combination of some of these.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Supply (AREA)
US12/435,579 2008-05-05 2009-05-05 Device And Method Of Combusting Solid Fuel With Oxygen Abandoned US20090280442A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/IB2009/051844 WO2009136366A2 (fr) 2008-05-05 2009-05-05 Dispositif et procédé de combustion de combustible solide avec de l'oxygène
US12/435,579 US20090280442A1 (en) 2008-05-05 2009-05-05 Device And Method Of Combusting Solid Fuel With Oxygen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US5051508P 2008-05-05 2008-05-05
US12/435,579 US20090280442A1 (en) 2008-05-05 2009-05-05 Device And Method Of Combusting Solid Fuel With Oxygen

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WO (1) WO2009136366A2 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102322633A (zh) * 2011-09-16 2012-01-18 徐州燃控科技股份有限公司 煤粉纯氧卷吸燃烧器
US20120129111A1 (en) * 2010-05-21 2012-05-24 Fives North America Combustion, Inc. Premix for non-gaseous fuel delivery
US8707877B2 (en) 2011-06-05 2014-04-29 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Solid fuel and oxygen combustion with low NOx and efficient burnout
CN107300170A (zh) * 2017-08-11 2017-10-27 云汇环保科技南通有限公司 一种冶炼窑炉上的粉煤全氧燃烧装置
US20180142887A1 (en) * 2015-06-12 2018-05-24 Mitsubishi Hitachi Power Systems, Ltd. Burner, combustion device, boiler, and burner control method
US11306915B2 (en) * 2018-09-26 2022-04-19 Taiheiyo Cement Corporation Cement kiln burner device and method for operating the same
CN115298484A (zh) * 2019-12-20 2022-11-04 朱比特氧气公司 包含环形护罩炉头的燃烧系统
US12359807B2 (en) 2019-12-20 2025-07-15 Jupiter Oxygen Corporation Combustion system comprising an annular shroud burner

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2500640A1 (fr) 2011-03-16 2012-09-19 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Procédé de combustion à faible NOx et brûleur correspondant
WO2024168383A1 (fr) * 2023-02-13 2024-08-22 Paradigm Fuels Pty Ltd Système de production et d'utilisation de gaz nox dans un système de croissance pour algues

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US2765621A (en) * 1953-01-23 1956-10-09 Shell Dev Combustion apparatus with toroidal eddy flame stabilizer
US4208180A (en) * 1978-02-06 1980-06-17 Ube Industries, Ltd. Mixed-firing burners for use with pulverized coal and heavy oil
US4679512A (en) * 1985-05-20 1987-07-14 Stubinen Utveckling Ab Method of and apparatus for burning liquid and/or solid fuels in pulverized from
US5178533A (en) * 1989-10-04 1993-01-12 Enterprise Generale De Chauffage Industries Pillard Process for exploiting a burner and burners for a rotary tubular furnance
US5203692A (en) * 1990-01-29 1993-04-20 F. L. Smidth & Co. A/S Burner for solid and liquid or gaseous fuel
US5411394A (en) * 1990-10-05 1995-05-02 Massachusetts Institute Of Technology Combustion system for reduction of nitrogen oxides
US5698010A (en) * 1994-11-02 1997-12-16 Nkk Corporation Scrap melting method
US6315551B1 (en) * 2000-05-08 2001-11-13 Entreprise Generale De Chauffage Industriel Pillard Burners having at least three air feed ducts, including an axial air duct and a rotary air duct concentric with at least one fuel feed, and a central stabilizer

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JPS62266306A (ja) * 1986-05-14 1987-11-19 Babcock Hitachi Kk 微粉炭燃焼装置
US5129818A (en) * 1990-09-14 1992-07-14 Benno Balsiger Method of feeding back exhaust gases in oil and gas burners
US7717701B2 (en) * 2006-10-24 2010-05-18 Air Products And Chemicals, Inc. Pulverized solid fuel burner

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2765621A (en) * 1953-01-23 1956-10-09 Shell Dev Combustion apparatus with toroidal eddy flame stabilizer
US4208180A (en) * 1978-02-06 1980-06-17 Ube Industries, Ltd. Mixed-firing burners for use with pulverized coal and heavy oil
US4679512A (en) * 1985-05-20 1987-07-14 Stubinen Utveckling Ab Method of and apparatus for burning liquid and/or solid fuels in pulverized from
US5178533A (en) * 1989-10-04 1993-01-12 Enterprise Generale De Chauffage Industries Pillard Process for exploiting a burner and burners for a rotary tubular furnance
US5203692A (en) * 1990-01-29 1993-04-20 F. L. Smidth & Co. A/S Burner for solid and liquid or gaseous fuel
US5411394A (en) * 1990-10-05 1995-05-02 Massachusetts Institute Of Technology Combustion system for reduction of nitrogen oxides
US5698010A (en) * 1994-11-02 1997-12-16 Nkk Corporation Scrap melting method
US6315551B1 (en) * 2000-05-08 2001-11-13 Entreprise Generale De Chauffage Industriel Pillard Burners having at least three air feed ducts, including an axial air duct and a rotary air duct concentric with at least one fuel feed, and a central stabilizer

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120129111A1 (en) * 2010-05-21 2012-05-24 Fives North America Combustion, Inc. Premix for non-gaseous fuel delivery
US8707877B2 (en) 2011-06-05 2014-04-29 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Solid fuel and oxygen combustion with low NOx and efficient burnout
CN102322633A (zh) * 2011-09-16 2012-01-18 徐州燃控科技股份有限公司 煤粉纯氧卷吸燃烧器
US20180142887A1 (en) * 2015-06-12 2018-05-24 Mitsubishi Hitachi Power Systems, Ltd. Burner, combustion device, boiler, and burner control method
US10591156B2 (en) * 2015-06-12 2020-03-17 Mitsubishi Hitachi Power Systems, Ltd. Burner, combustion device, boiler, and burner control method
CN107300170A (zh) * 2017-08-11 2017-10-27 云汇环保科技南通有限公司 一种冶炼窑炉上的粉煤全氧燃烧装置
US11306915B2 (en) * 2018-09-26 2022-04-19 Taiheiyo Cement Corporation Cement kiln burner device and method for operating the same
CN115298484A (zh) * 2019-12-20 2022-11-04 朱比特氧气公司 包含环形护罩炉头的燃烧系统
JP2023507986A (ja) * 2019-12-20 2023-02-28 ジュピター オキシジェン コーポレーション 環状シュラウドバーナを含む燃焼システム
EP4062103A4 (fr) * 2019-12-20 2023-12-13 Jupiter Oxygen Corporation Système de combustion comprenant un brûleur à enveloppe annulaire
US12359807B2 (en) 2019-12-20 2025-07-15 Jupiter Oxygen Corporation Combustion system comprising an annular shroud burner

Also Published As

Publication number Publication date
WO2009136366A3 (fr) 2010-12-16
WO2009136366A2 (fr) 2009-11-12

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