EP1998112A2 - Brûleur destiné à la combustion d'un gas à faible capacité calorifique - Google Patents

Brûleur destiné à la combustion d'un gas à faible capacité calorifique Download PDF

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Publication number
EP1998112A2
EP1998112A2 EP08156197A EP08156197A EP1998112A2 EP 1998112 A2 EP1998112 A2 EP 1998112A2 EP 08156197 A EP08156197 A EP 08156197A EP 08156197 A EP08156197 A EP 08156197A EP 1998112 A2 EP1998112 A2 EP 1998112A2
Authority
EP
European Patent Office
Prior art keywords
gas
steam generator
section
flow cross
swirl
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Withdrawn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
EP08156197A
Other languages
German (de)
English (en)
Other versions
EP1998112A3 (fr
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
Hitachi Power Europe GmbH
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 Hitachi Power Europe GmbH filed Critical Hitachi Power Europe GmbH
Publication of EP1998112A2 publication Critical patent/EP1998112A2/fr
Publication of EP1998112A3 publication Critical patent/EP1998112A3/fr
Withdrawn legal-status Critical Current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 invention is directed to a steam generator gas burner for combustion of low calorific gases, which comprises a core air tube, a gas pipe arranged coaxially around the core air tube to form a ring gas flow cross section and at least one further tubular element arranged around the gas pipe to form a particularly annular secondary air flow cross section Gas flow cross section first swirler are arranged.
  • Gas generators for steam generators also use gas burners which burn low calorific gases.
  • low calorific gases are made available in particular in the vicinity of metallurgical plants as so-called metallurgical gases. This may be blast furnace gas or blast furnace gas, converter gas, coking gas or similar process residue gases.
  • pressure oscillations may occur in the combustion chamber area, which leads to damage to the lining of the steel structure.
  • Pressure oscillations occur where there is an excitation source, a resonance chamber and a connection via pipelines.
  • the emergence of pressure oscillations in the furnace is a consequence of the flow, heat and combustion as well as the acoustic properties of the entire system.
  • the basis of pressure oscillations is a feedback loop, at the supply lines of the resonance system, the burner, the coupling member and the flame including the combustion chamber are the excitation source and amplification.
  • the pressure oscillations are due to a sudden volume increase after the ignition of the fuel-air mixture.
  • gases produced in steelworks are mixed there and then fed to the steam generator gas burner as low-calorie metallurgical gas.
  • the fuel properties in particular the calorific value of the combustion gas supplied to the steam generator gas burner, change as a result of such a mixing of a plurality of metallurgical gases.
  • the varying fuel properties influence the Flame formation and can then in turn lead to combustion vibrations are excited by the combustion.
  • the excitation energy increases. Under certain boundary conditions, a resonance oscillation of the flue gas column in the combustion chamber can then arise.
  • the invention is based on the object to provide a solution which makes it possible to adapt a steam generator gas burner taking into account the respective ignition intensity of varying fuel gas properties, in particular a fluctuating heating value.
  • this object is achieved in that the first swirl body are arranged adjustable.
  • the swirl degree of the flowing low-calorie combustion gas generated by the first swirler bodies may also be influenced during operation of a steam generator gas burner in order to adjust its velocity tangential component and thus the swirl degree of the fuel gas flow. Due to the first swirl body, the fuel gas stream initially flowing in the longitudinal axial direction of the gas burner experiences a deflection in the tangential direction, which forces a swirl impulse, the so-called fuel gas swirl, onto the fuel gas stream flowing again in the longitudinal axial direction after leaving the first swirl body.
  • the fuel gas swirl By adjusting the fuel gas swirl, ie varying the degree and the degree / inclination of the deflection of the fuel gas flow from its original longitudinal axial flow direction in a tangential deflection direction, influence on the Melting area of the burner taking place mixing of the low-calorie combustible gas with the added in the core air tube primary or core air and radially outside added secondary air are taken.
  • the first swirler are adjusted and possibly adjusted during operation, that optimum combustion and flame formation takes place, which avoids the formation of combustion chamber vibrations.
  • the degree of swirl to be achieved by the position of the first swirl body can be set once during commissioning of the steam generator burner and tuned to the gas quality to be burned and continuously controlled and adjusted during operation of the steam generator gas burner permanently and / or continuously the fuel properties and the fuel gas flow.
  • the first swirl bodies can be adjustably arranged in the gas flow cross-section in that the first swirl bodies are designed as swirl blades extending in the radial direction of the core air tube.
  • the first swirling bodies in the form of blades projecting from the outside of the core air tube into the gas flow cross section and can now be designed to be rotatable, in particular, about their longitudinal axis.
  • a larger or smaller cross-sectional area depending on the rotational position of the respective swirl blade can then be counterposed to the direction of flow of the fuel gas flow and thus act as a flow obstacle and flow diversion surface to shift the fuel gas flow into a different degree of swirl.
  • the invention provides in an embodiment that the first swirler each about their in the radial direction of the core air tube extending longitudinal axis rotatably arranged outside on the core air tube.
  • first swirl bodies are arranged upstream of the mouth regions of the core air tube and gas pipe in the combustion chamber, which the invention also provides. This makes it possible to achieve a homogenization of the fuel gas flow provided with a swirl impulse before reaching the mouth region in the burner.
  • this is expedient if the secondary air is provided with a corresponding degree of swirl. It is then further advantageous according to the invention, when the first swirler are arranged in relation to arranged in the secondary air flow cross-section second swirler at a further upstream position.
  • the invention is characterized in a further development by a Strömungsleitring, which is arranged in the frontal mouth region of the gas pipe, the gas flowing in the gas flow cross-section in the direction of the burner longitudinal axis to first deflecting flow surfaces and in the Secondary air flow cross-section flowing air in the direction away from the burner longitudinal axis has deflecting second flow surfaces. This will the secondary air flow to the outside and the combustion gas flow deflected inward and thus delays the coincidence of the two gases.
  • the flow guide ring is arranged axially adjustably on the gas pipe, which provides the invention in an embodiment.
  • a favorable design of the flow-guiding ring can then be realized if the flow-guiding ring has holes, in particular a surface of the flow-guiding ring covering the gas flow cross-section of the gas pipe is designed as a perforated diaphragm.
  • Advantageous materials for the production of the Strömungsleitringes are heat-resistant sheet, ceramic or cast metal, in particular centrifugal casting, the invention finally also provides in an advantageous embodiment that the flow guide is cooled and / or provided with a ceramic coating.
  • the single FIGURE shows a schematic and partially sectioned side and cross-sectional view of a generally designated 1 steam generator gas burner, which is designed in the form of a so-called round burner.
  • the burner has a core air tube 2, which is arranged in the center of the steam generator gas burner 1 coaxially about its longitudinal axis 3 around.
  • combustion air is supplied as core air.
  • an annular gas flow cross-section 5 is formed on the outside by a gas pipe 6 which is arranged coaxially around the core air pipe 2.
  • annular secondary air flow cross-section 7 Around the gas pipe 6 around another flow area is formed as an annular secondary air flow cross-section 7, which on the outside of a tubular element 8 and is limited.
  • a low-calorie combustion or combustion gas a so-called metallurgical gas, which can be produced in a steel mill at various production sites, is fed to the mouth region of the steam generator gas burner 1.
  • the metallurgical gas may also be a mixture of various gases such as blast furnace gas, coke oven gas or the like.
  • the secondary air flow cross section 7 the secondary combustion air, the so-called secondary air, is supplied to the mouth region of the steam generator gas burner 1.
  • first swirl body 9 and in the secondary air flow section 7 second swirl body 10 are arranged.
  • the first and second swirl bodies 9, 10 are arranged as swirl body rings on the respective tube, the core air tube 2 in the first swirl bodies 9 and the gas tube 6 in the second swirl bodies 10, and extend through the respective flow cross section 5, 7 as far as the nearest tube , the gas pipe 6 in the case of the first swirl body 9 and the pipe element 8 in the case of the second swirl body 10.
  • the first swirl bodies 9 are in the form of swirl vanes and form a blade ring.
  • the respective longitudinal axis of each of the individual first swirler bodies 9 of the blade ring is positioned radially directed onto the longitudinal axis 3.
  • Each individual swirl blade 9 is rotatable about this longitudinal axis and thus in its relative position in the gas flow cross section 5 adjustable.
  • Both the first swirl body 9 and the second swirl body 10 are disposed upstream of the mouth of the steam generator gas burner 1 to the combustion chamber 4 within the respective flow cross section 5, 7, wherein with respect to the orifice of the steam generator gas burner 1, the first swirl body 9 are positioned further upstream than the second Swirl body 10.
  • a flow guide 11 is arranged in the mouth opening of the gas pipe 6 in the mouth opening of the gas pipe 6, in the mouth opening of the gas pipe 6, a flow guide 11 is arranged. It is arranged in the direction of the longitudinal axis 3 axially adjustable on the inside of the gas pipe 6 and / or fixed.
  • the flow guide ring 11 has flow elements 12 which have first flow surfaces 12a cooperating with the gas flow cross section 5 and second flow surfaces 12b cooperating with the secondary air flow cross section 7.
  • the first flow surfaces 12 a are designed such that gas flowing in the gas flow cross section 5 is deflected in the direction of the burner longitudinal axis 3
  • the second flow surfaces 12 b are designed so that air flowing in the secondary air flow cross section 7 is deflected away in the direction of the burner longitudinal axis 3
  • the flow guide ring 11 is further designed so that its annular end face 13 covers only the mouth-side outlet side of the gas flow cross-section 5 and this surface is formed in the form of a pinhole. Only the second flow surfaces 12b extend slightly into the continuation of the secondary air flow cross section 7 into the combustion chamber 4 on the outside.
  • the flow guide 11 consists of a metallic casting material, in particular centrifugal casting, but can also be made of a ceramic material or a heat-resistant sheet. Furthermore, the Flow guide 11 may be cooled and / or be provided with a ceramic coating.
  • gas lances 14a, 14b are arranged, with which, if desired, supplementary high-calorie gas, for example natural gas, can be supplied to the steam generator gas burner port for combustion as supplementary fuel gas.
  • supplementary high-calorie gas for example natural gas
  • an oil or gas ignition burner 15 is arranged in the center of the burner along the longitudinal axis 3.

Landscapes

  • 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)
EP08156197A 2007-05-29 2008-05-14 Brûleur destiné à la combustion d'un gas à faible capacité calorifique Withdrawn EP1998112A3 (fr)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
EP1998112A2 true EP1998112A2 (fr) 2008-12-03
EP1998112A3 EP1998112A3 (fr) 2010-05-05

Family

ID=39720330

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08156197A Withdrawn EP1998112A3 (fr) 2007-05-29 2008-05-14 Brûleur destiné à la combustion d'un gas à faible capacité calorifique

Country Status (12)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2479491A1 (fr) * 2011-01-20 2012-07-25 Fortum OYJ Procédé et brûleur pour brûler du gaz pauvre dans une chaudière de centrale électrique

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Publication number Priority date Publication date Assignee Title
US8408896B2 (en) * 2007-07-25 2013-04-02 Lummus Technology Inc. Method, system and apparatus for firing control
CN102226522B (zh) * 2011-06-01 2013-01-23 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
EP3364105B1 (fr) 2017-02-16 2019-11-27 Vysoké ucení Technické v Brne Brûleur pour combustibles à faible pouvoir calorifique
CN112923359B (zh) * 2021-04-14 2025-08-12 河南郑矿机器有限公司 用于煤矸石陶粒的谷糠燃烧器
US20250060096A1 (en) * 2023-08-14 2025-02-20 Air Products And Chemicals, Inc. Burner and Method of Operation

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2479491A1 (fr) * 2011-01-20 2012-07-25 Fortum OYJ Procédé et brûleur pour brûler du gaz pauvre dans une chaudière de centrale électrique
WO2012098174A1 (fr) * 2011-01-20 2012-07-26 Fortum Oyj Procédé et brûleur pour la combustion de gaz pauvre dans une chaudière de centrale

Also Published As

Publication number Publication date
DE102007025051B4 (de) 2011-06-01
EP1998112A3 (fr) 2010-05-05
CA2631766A1 (fr) 2008-11-29
UA90768C2 (ru) 2010-05-25
AU2008202277A1 (en) 2008-12-18
AR066738A1 (es) 2009-09-09
RU2008119392A (ru) 2009-11-27
CL2008001561A1 (es) 2009-03-13
BRPI0801968A2 (pt) 2009-05-05
ZA200804616B (en) 2009-02-25
DE102007025051A1 (de) 2008-12-04
CN101315188A (zh) 2008-12-03
US20080299506A1 (en) 2008-12-04

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