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US20080299506A1 - Metallurgical Gas Burner - Google Patents

Metallurgical Gas Burner Download PDF

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Publication number
US20080299506A1
US20080299506A1 US12/126,288 US12628808A US2008299506A1 US 20080299506 A1 US20080299506 A1 US 20080299506A1 US 12628808 A US12628808 A US 12628808A US 2008299506 A1 US2008299506 A1 US 2008299506A1
Authority
US
United States
Prior art keywords
gas
tube
steam generator
swirlers
section
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
US12/126,288
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English (en)
Inventor
Bernhard Zimmermann
Robert Melchior
Klaus Mangelmans
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.)
Hitachi Power Europe GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to HITACHI POWER EUROPE GMBH reassignment HITACHI POWER EUROPE GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MELCHIOR, ROBERT, MANGELMANS, KLAUS, ZIMMERMANN, BERNHARD
Publication of US20080299506A1 publication Critical patent/US20080299506A1/en
Assigned to HITACHI POWER EUROPE GMBH reassignment HITACHI POWER EUROPE GMBH TO CORRECT NOTICE OF RECORDATION OF ASSIGNMENT DOCUMENT NO. 103515252 REEL/FRAME 021286/0300, RECORDATION DATE: 07/21/2008 Assignors: MELCHIOR, ROBERT, MANGELMANS, KLAUS, ZIMMERMANN, BERNHARD
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F23D14/24—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other at least one of the fluids being submitted to a swirling motion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14002—Special features of gas burners of premix or non premix types, specially adapted for the combustion of low heating value [LHV] gas

Definitions

  • the present invention relates to a steam generator gas burner for burning gases of low calorific value, which comprises a core air tube, a gas tube arranged coaxially around the core air tube to form a gas flow cross section, in particular an annular gas flow cross section, and at least one further tube element arranged coaxially around the gas tube to form a secondary air flow cross section, in particular an annular secondary air flow cross section, wherein first swirlers being arranged in the gas flow cross section.
  • gas burners which burn gases of low calorific value are also used.
  • gases of low calorific value are made available in particular in the vicinity of metallurgical plants as what are known as metallurgical gases. They may take the form of top gas, blast furnace gas, converter gas, coke-oven gas or similar process-residue-gases.
  • pressure vibrations may occur in the region of the combustion chamber and lead to damage to the lining of the steel structure. Pressure vibrations occur where there is a source of excitation, a resonant cavity and a connection via pipelines.
  • the occurrence of pressure vibrations in the firing system is a consequence of the technical properties of the overall installation in terms of flow, heat and combustion as well as the acoustic properties.
  • the basis for pressure vibrations is a regenerative cycle in which the supply lines of the resonant system, the burner, the coupling element and the flame including the combustion chamber are the source of excitation and intensification. The pressure vibrations are attributable to a sudden increase in volume after the ignition of the combustible fuel-air mixture.
  • gases produced in metallurgical plants are mixed there and are then fed to the steam generator gas burner as metallurgical gas of low calorific value.
  • the properties of the fuel in particular the calorific value of the combustion gas fed to the steam generator gas burner, change, depending on the mixing ratio of the various gases.
  • the varying properties of the fuel have an influence on the formation of the flame and can then in turn lead to combustion chamber vibrations being caused by the combustion.
  • the excitation energy increases. Under certain boundary conditions, a resonance vibration of the flue gas column may then occur in the combustion chamber.
  • the present invention relates to adapting a steam generator gas burner to varying properties of the combustible gas, in particular a fluctuating calorific value, while taking into consideration the respective ignition intensity.
  • the steam generator gas burner according to an exemplary embodiment of the present invention includes first swirlers which are adjustably arranged.
  • first swirlers are adjustably arranged within the gas flow cross section, it is possible, if appropriate, to influence the degree of swirling of the flowing combustion gas of low calorific value produced by the first swirlers for adjustment of the tangential velocity component of the gas, and consequently the degree of swirling of the combustible gas flow, even during the operation of a steam generator gas burner.
  • the first swirlers have the effect that the combustible gas flow, initially flowing in the longitudinally axial direction of the gas burner, experiences a deflection in the tangential direction, which imparts a swirl pulse, known as the combustible gas swirl, to the combustible gas flow flowing again in the longitudinally axial direction after leaving the first swirlers.
  • the first swirlers are set and if applicable adjusted during operation in such a way that optimum burning and flame formation take place, avoiding the occurrence of furnace chamber vibrations.
  • the degree of swirling to be achieved by the position of the first swirlers can in this case both be set, and made to suit the quality of gas to be burned, in a one-off event when the steam generator gas burner is put into operation and be permanently and/or continuously controlled and adapted in accordance with the properties of the combustible material and the combustible gas flow during the operation of the steam generator gas burner.
  • the first swirlers can be arranged adjustably in the gas flow cross section in such a way that the first swirlers are formed as swirl blades extending in the radial direction of the core air tube.
  • the first swirlers in the form of blades protrude from the outer side of the core air tube into the gas flow cross section, and can therefore be rotatably formed, in particular about the longitudinal axis.
  • the invention provides in a refinement that the first swirlers are rotatably arranged respectively about their longitudinal axis, extending in the radial direction of the core air tube, on the outside of the core air tube.
  • the first swirlers are arranged upstream of the mouth regions of the core air tube and the gas tube into the furnace chamber, which the invention likewise provides.
  • an evening out of the combustible gas flow provided with a swirling pulse is achieved before it reaches the mouth region in the burner.
  • this is expedient whenever the secondary air is provided with a corresponding degree of swirl.
  • the first swirlers are arranged at a position situated further upstream with respect to second swirlers arranged in the secondary air flow cross section.
  • first swirlers in the gas flow cross section but also the arrangement of second swirlers in the secondary air flow cross section have the effect of allowing delayed mixing of the combustible gas and the combustion air to be achieved in the outlet region of the steam generator gas burner to the furnace chamber, with the aid of which the ignition can be positioned optimally in each case.
  • the invention is distinguished in a development by a flow directing ring, which is arranged in the mouth region at the end face of the gas tube and has first flow areas, deflecting gas flowing in the gas flow cross section in the direction towards the burner longitudinal axis, and second flow areas, deflecting air flowing in the secondary air flow cross section in the direction away from the burner longitudinal axis.
  • a flow directing ring which is arranged in the mouth region at the end face of the gas tube and has first flow areas, deflecting gas flowing in the gas flow cross section in the direction towards the burner longitudinal axis, and second flow areas, deflecting air flowing in the secondary air flow cross section in the direction away from the burner longitudinal axis.
  • the flow directing ring is arranged axially adjustably on the gas tube, which the invention provides in a refinement.
  • a favourable design of the flow directing ring can be realized if the flow directing ring has holes, especially an area of the flow directing ring that covers the gas flow cross section of the gas tube is formed as a perforated plate.
  • Advantageous materials for producing the flow directing ring are heat-resistant sheet metal, ceramic material or cast metal, in particular centrifugally cast metal, the invention finally further providing in an advantageous refinement that the flow directing ring is cooled and/or is provided with a ceramic coating.
  • FIGURE shows a steam generator gas burner according to an exemplary embodiment of the present invention.
  • FIGURE shows in a schematic and partially sectional side view and cross-sectional representation a steam generator gas burner denoted overall by 1 , which is designed in the form of what is known as an annular burner.
  • the burner has a core air tube 2 , which is arranged in the centre of the steam generator gas burner 1 , coaxially around the longitudinal axis 3 of the latter.
  • Combustion air is supplied as core air through the core air tube 2 to the mouth side of the steam generator gas burner 1 that is facing a furnace chamber 4 of a steam generator.
  • This gas flow cross section 5 is delimited on the outside by a gas tube 6 , which is arranged coaxially around the core air tube 2 .
  • a gas tube 6 Formed around the gas tube 6 is a further flow region as an annular secondary air flow cross section 7 , which is enclosed and delimited on the outside by a tube element 8 .
  • a combustible or combustion gas of low calorific value known as a metallurgical gas, which can occur at various production locations in a metallurgical plant, is supplied through the gas flow cross section 5 to the mouth region of the steam generator gas burner 1 .
  • the metallurgical gas may be a mixture of various gases such as blast-furnace top gas, coke-oven gas or the like.
  • Secondary combustion air is fed through the secondary air flow cross section 7 to the mouth region of the steam generator gas burner 1 .
  • first swirlers 9 and in the secondary air flow cross section 7 second swirlers 10 are arranged.
  • the first and second swirlers 9 , 10 are arranged as swirler rings on the respective tube, the core air tube 2 in the case of the first swirlers 9 and the gas tube 6 in the case of the second swirlers 10 , and extend through the respective flow cross section 5 , 7 to the next tube, the gas tube 6 in the case of the first swirlers 9 and the tube element 8 in the case of the second swirlers 10 .
  • the first swirlers 9 take the form of swirl blades and form a ring of blades.
  • the respective longitudinal axis of each of the individual first swirlers 9 of the ring of blades is positioned such that it is radially directed at the longitudinal axis 3 .
  • Each individual swirl blade 9 is rotatably about this longitudinal axis, and consequently adjustable in its relative position in the gas flow cross section 5 .
  • Both the first swirlers 9 and the second swirlers 10 are arranged upstream of the mouth opening of the steam generator gas burner 1 towards the furnace chamber 4 within the respective flow cross section 5 , 7 , the first swirlers 9 being positioned further upstream than the second swirlers 10 with respect to the mouth opening of the steam generator gas burner 1 .
  • a flow directing ring 11 is arranged in the mouth opening of the gas tube 6 . It is arranged and/or fastened on the inner side of the gas tube 6 such that it is adjustable axially in the direction of the longitudinal axis 3 .
  • the flow directing ring 11 has flow elements 12 , which have first flow areas 12 a , interacting with the gas flow cross section 5 , and second flow areas 12 b , interacting with the secondary air flow cross section 7 .
  • the first flow areas 12 a are designed here in such a way that gas flowing in the gas flow cross section 5 is deflected in the direction towards the burner longitudinal axis 3 and the second flow areas 12 b are designed here in such a way that air flowing in the secondary air flow cross section 7 is deflected in the direction away from the burner longitudinal axis 3 .
  • the flow directing ring 11 is in this case also formed in such a way that its annular end face 13 merely covers the outlet side of the gas flow cross section 5 on the mouth side, and this area is provided in the form of a perforated plate. Only the second flow areas 12 b reach on the outside slightly into the continuation of the secondary air flow cross section 7 into the furnace chamber 4 .
  • the flow directing ring 11 consists of a metallic cast material, in particular centrifugally cast material, but may also be produced from a ceramic material or a heat-resistant sheet metal. Furthermore, the flow directing ring 11 may be cooled and/or provided with a ceramic coating.
  • gas lances 14 a , 14 b As known from customary gas burners, arranged inside the core air tube 2 are gas lances 14 a , 14 b , with which it is also additionally possible if desired to feed gas of high calorific value, for example natural gas, to the mouth of the steam generator gas burner, for burning as supplementary combustible gas. Furthermore, an oil or gas ignition burner 15 is arranged in the centre of the burner along the longitudinal axis 3 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Gas Burners (AREA)
  • Combustion Of Fluid Fuel (AREA)
US12/126,288 2007-05-29 2008-05-23 Metallurgical Gas Burner Abandoned US20080299506A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007025051.9-13 2007-05-29
DE102007025051A DE102007025051B4 (de) 2007-05-29 2007-05-29 Hüttengasbrenner

Publications (1)

Publication Number Publication Date
US20080299506A1 true US20080299506A1 (en) 2008-12-04

Family

ID=39720330

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/126,288 Abandoned US20080299506A1 (en) 2007-05-29 2008-05-23 Metallurgical Gas Burner

Country Status (12)

Country Link
US (1) US20080299506A1 (es)
EP (1) EP1998112A3 (es)
CN (1) CN101315188A (es)
AR (1) AR066738A1 (es)
AU (1) AU2008202277A1 (es)
BR (1) BRPI0801968A2 (es)
CA (1) CA2631766A1 (es)
CL (1) CL2008001561A1 (es)
DE (1) DE102007025051B4 (es)
RU (1) RU2008119392A (es)
UA (1) UA90768C2 (es)
ZA (1) ZA200804616B (es)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090029300A1 (en) * 2007-07-25 2009-01-29 Ponzi Peter R Method, system and apparatus for firing control
CN102226522A (zh) * 2011-06-01 2011-10-26 中国科学院广州能源研究所 一种气体燃烧器
CN103822208A (zh) * 2012-11-16 2014-05-28 航天长征化学工程股份有限公司 气化炉燃烧器
EP3364105A1 (en) 2017-02-16 2018-08-22 Vysoké ucení Technické v Brne Burner head for low calorific fuels
CN112923359A (zh) * 2021-04-14 2021-06-08 河南郑矿机器有限公司 用于煤矸石陶粒的谷糠燃烧器
WO2025038656A1 (en) * 2023-08-14 2025-02-20 Air Products And Chemicals, Inc. Burner and method of operation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2479491T3 (pl) * 2011-01-20 2014-08-29 Fortum Oyj Sposób i palnik do spalania ubogiego gazu w kotle elektrowni

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US3480375A (en) * 1967-04-22 1969-11-25 Koppers Wistra Ofenbau Gmbh Burner for metallurgical furnaces
US3822654A (en) * 1973-01-08 1974-07-09 S Ghelfi Burner for burning various liquid and gaseous combustibles or fuels
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US20070134608A1 (en) * 2003-07-18 2007-06-14 Hanno Tautz Gas burner
US20070281265A1 (en) * 2006-06-01 2007-12-06 Hamid Sarv Large diameter mid-zone air separation cone for expanding IRZ
US7430970B2 (en) * 2005-06-30 2008-10-07 Larue Albert D Burner with center air jet
US20090000532A1 (en) * 2007-06-28 2009-01-01 Martin Ehmann Pulverized coal burner for firing fuel which is fed by dense phase conveyance

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DE4217879A1 (de) * 1992-05-29 1993-12-02 Babcock Energie Umwelt Brenner für staubförmigen Brennstoff
DE4328130A1 (de) * 1993-08-20 1995-02-23 Saacke Gmbh & Co Kg Verfahren und Vorrichtung zum emissionsarmen Verbrennen von fließfähigen und/oder gasförmigen Brennstoffen mit interner Rauchgasrezirkulation
DE20009524U1 (de) * 2000-05-26 2000-09-21 ERC Emissions-Reduzierungs-Concepte GmbH, 22844 Norderstedt Brenner mit Drallregler
DE102005032109B4 (de) * 2005-07-07 2009-08-06 Hitachi Power Europe Gmbh Kohlenstaubbrenner für niedrige NOx-Emissionen

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US3822654A (en) * 1973-01-08 1974-07-09 S Ghelfi Burner for burning various liquid and gaseous combustibles or fuels
US4333405A (en) * 1979-08-16 1982-06-08 L. & C. Steinmuller Gmbh Burner for combustion of powdered fuels
US4455949A (en) * 1980-02-13 1984-06-26 Brennstoffinstitut Freiberg Burner for gasification of powdery fuels
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US4545307A (en) * 1984-04-23 1985-10-08 Babcock-Hitachi Kabushiki Kaisha Apparatus for coal combustion
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US4952136A (en) * 1987-05-12 1990-08-28 Control Systems Company Burner assembly for oil fired furnaces
US4930430A (en) * 1988-03-04 1990-06-05 Northern Engineering Industries Plc Burners
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US20020139121A1 (en) * 2001-03-30 2002-10-03 Cornwell Michael Dale Airblast fuel atomization system
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US20030143502A1 (en) * 2002-01-31 2003-07-31 Heier Kevin Ray Large scale vortex devices for improved burner operation
US6752620B2 (en) * 2002-01-31 2004-06-22 Air Products And Chemicals, Inc. Large scale vortex devices for improved burner operation
US6773256B2 (en) * 2002-02-05 2004-08-10 Air Products And Chemicals, Inc. Ultra low NOx burner for process heating
US20070048679A1 (en) * 2003-01-29 2007-03-01 Joshi Mahendra L Fuel dilution for reducing NOx production
US20070134608A1 (en) * 2003-07-18 2007-06-14 Hanno Tautz Gas burner
US7430970B2 (en) * 2005-06-30 2008-10-07 Larue Albert D Burner with center air jet
US20070281265A1 (en) * 2006-06-01 2007-12-06 Hamid Sarv Large diameter mid-zone air separation cone for expanding IRZ
US20090000532A1 (en) * 2007-06-28 2009-01-01 Martin Ehmann Pulverized coal burner for firing fuel which is fed by dense phase conveyance

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090029300A1 (en) * 2007-07-25 2009-01-29 Ponzi Peter R Method, system and apparatus for firing control
US8408896B2 (en) 2007-07-25 2013-04-02 Lummus Technology Inc. Method, system and apparatus for firing control
CN102226522A (zh) * 2011-06-01 2011-10-26 中国科学院广州能源研究所 一种气体燃烧器
CN103822208A (zh) * 2012-11-16 2014-05-28 航天长征化学工程股份有限公司 气化炉燃烧器
EP3364105A1 (en) 2017-02-16 2018-08-22 Vysoké ucení Technické v Brne Burner head for low calorific fuels
CN112923359A (zh) * 2021-04-14 2021-06-08 河南郑矿机器有限公司 用于煤矸石陶粒的谷糠燃烧器
WO2025038656A1 (en) * 2023-08-14 2025-02-20 Air Products And Chemicals, Inc. Burner and method of operation

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AR066738A1 (es) 2009-09-09
UA90768C2 (ru) 2010-05-25
EP1998112A2 (de) 2008-12-03
BRPI0801968A2 (pt) 2009-05-05
RU2008119392A (ru) 2009-11-27
DE102007025051B4 (de) 2011-06-01
ZA200804616B (en) 2009-02-25
AU2008202277A1 (en) 2008-12-18
DE102007025051A1 (de) 2008-12-04
CN101315188A (zh) 2008-12-03
CA2631766A1 (en) 2008-11-29
CL2008001561A1 (es) 2009-03-13
EP1998112A3 (de) 2010-05-05

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