EP1046011B1 - Ceramic burner for gases and regenerative heat generator provided with the said burner - Google Patents

Ceramic burner for gases and regenerative heat generator provided with the said burner Download PDF

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Publication number
EP1046011B1
EP1046011B1 EP98962386A EP98962386A EP1046011B1 EP 1046011 B1 EP1046011 B1 EP 1046011B1 EP 98962386 A EP98962386 A EP 98962386A EP 98962386 A EP98962386 A EP 98962386A EP 1046011 B1 EP1046011 B1 EP 1046011B1
Authority
EP
European Patent Office
Prior art keywords
combustion
feed duct
duct
ceramic burner
partition
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.)
Expired - Lifetime
Application number
EP98962386A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1046011A1 (en
Inventor
Johannes Cornelis Antoine Van Den Bemt
Coert Johannes Nooij
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.)
Danieli Corus Europe BV
Original Assignee
Danieli Corus Europe BV
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Filing date
Publication date
Application filed by Danieli Corus Europe BV filed Critical Danieli Corus Europe BV
Publication of EP1046011A1 publication Critical patent/EP1046011A1/en
Application granted granted Critical
Publication of EP1046011B1 publication Critical patent/EP1046011B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/74—Preventing flame lift-off
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2209/00—Safety arrangements
    • F23D2209/20—Flame lift-off / stability
    • 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
    • F23D2900/21—Burners specially adapted for a particular use
    • F23D2900/21001—Burners specially adapted for a particular use for use in blast furnaces

Definitions

  • the invention relates to a ceramic burner for gases, especially for use in the combustion chamber of a regenerative heat generator, such as a hot-blast stove for a blast furnace, which ceramic burner is provided with a first feed duct for a first combustion component, such as a combustible gas, and with a second feed duct for a second combustion component, such as combustion air, the first feed duct opening out into a substantially elongate outlet opening and the second feed duct opening out into at least one second outlet opening, the latter opening(s) extending essentially parallel to and downstream of the first outlet opening, a partition, which continues until the two outlet openings, which outlet openings open directly into the combustion chamber, furthermore being situated between the first feed duct and the second feed duct.
  • the invention also relates to a regenerative heat generator provided with a ceramic burner of this nature.
  • a hot-blast stove When operating a blast furnace, a plurality of hot-blast stoves are grouped together in the vicinity of this blast furnace, with the result. that switching from one hot-blast stove to another means that it is always possible to feed the blast furnace, via a discharge port of a heated hot-blast stove, with hot air as a reaction component.
  • a hot-blast stove Whenever a hot-blast stove is disconnected from the blast furnace, it can be reheated by burning gas with the aid of the ceramic burner, whereupon hot flue gas flows through the combustion chamber and the heat-retention shaft, the heat-retention shaft absorbing the heat of the hot flue gas, so that this heat can then be given off again, in a subsequent operating phase, to air which is fed to the hot-blast stove via the supply port.
  • the object of the invention is to provide features which will cause the combustion to take place virtually constantly, preferably very close to the outlet openings.
  • the invention consists in the fact that at least one of the first and second feed ducts is provided with means for imparting turbulence, during operation, to the combustion component while emerging through the duct(s) in question, which turbulence is such that a combustible mixture of the two combustion components is formed upstream of and adjacent to the end of the partition.
  • This turbulence is brought about in a simple manner by said means comprising a step-widening, which is arranged in the vicinity of the outlet opening(s) of at least the first and/or the second feed duct, of the cross section of the duct in question, the step widening being provided by the shape of the partition and the step widening being followed, to as far as the end of the partition, by a gradual widening with the result that a turbulence chamber is formed.
  • the abrupt widening must be sufficiently wide to ensure sufficient turbulence. It has been found that good results are obtained if the step-widening amounts to 20 to 35 % of the original cross section of the duct in question.
  • the step widening is followed, to as far as the end of the partition, by a gradual widening, with the result that a turbulence chamber is formed.
  • the turbulence chamber formed acquires a sufficient volume to impart turbulence to a greater volume of gas and therefore to mix it into a combustible mixture. This ensures the stability of flame formation just above the end of the partition.
  • a ceramic burner is disclosed with a mixing chamber for combustion gas and air which is situated upstream of the combustion chamber and separated therefrom by a channel with a restricted cross-section.
  • the combustion of the mixture is prevented by this channel with a restricted cross-section. Since in the present ceramic burner of the invention the outlet openings of gas and air open directly into the combust chamber and the means for imparting turbulence forms a combustible mixture upstream and adjacent to the end of the partition, the ignition of the combustible mixture starts from such means.
  • EP 0 090 096 describes a ceramic burner in which the outlet openings for gas and air have been shaped in order to create turbulences starting from these outlet opening into the combustion chamber. No separate means, such as a step-widening have been disclosed in order to create turbulences and a mixture of gas and air upstream of the openings and adjacent to the end of the partition.
  • US 3,837,793 the prior art of ceramic burners has been disclosed over which the present invention constitutes an improvement.
  • the invention also relates to a regenerative heat generator, such as a hot-blast stove for a biast furnace, which is provided with a supply port for supplying gas to be heated and a discharge port for discharging heated gas, comprising a combustion chamber and a heat-retention shaft, the combustion chamber, in order to heat the heat generator, being provided with a ceramic burner, this ceramic burner being of the type described above.
  • a regenerative heat generator such as a hot-blast stove for a biast furnace, which is provided with a supply port for supplying gas to be heated and a discharge port for discharging heated gas, comprising a combustion chamber and a heat-retention shaft, the combustion chamber, in order to heat the heat generator, being provided with a ceramic burner, this ceramic burner being of the type described above.
  • reference numeral 1 denotes a heat generator in the form of a hot-blast stove for a blast furnace.
  • the hot-blast stove comprises a combustion chamber 2 and a heat-retention shaft 3, which are separated from one another by a wall 4.
  • a ceramic burner 5 is located at the bottom of the combustion chamber. Combustion air for the ceramic burner is supplied through connection port 6, and fuel in the form of a combustible gas is supplied through connection port 7. The mixture of combustion air and combustible gas is burned in combustion chamber 2.
  • the flue gases emanating from the combustion rise upwards in the combustion chamber 2, are diverted via the cupola 8, and then pass through the heat-retention shaft 3 which is filled with firebricks (not shown), where they give off sensible heat to the firebricks.
  • the flue gases which have been cooled as a result of this action leave the hot-blast stove through the discharge ports 9, one of which is illustrated.
  • Port 10 is connected to a distribution system for hot air, the so-called "hot wind”, in order for it to be fed to the blast furnace.
  • connection port 1 The combustible gas which is fed in via connection port 1 is diverted upwards into the first feed duct 13 for combustible gas, while connection port 6 merges into the second feed duct 12 for combustion air.
  • Feed ducts 12 and 13 are separated from one another by partition 11.
  • FIG. 2 The configuration around the top end of the partition 11 is indicated by II and illustrated in detail, on an enlarged scale, in Fig. 2.
  • Corresponding reference numerals from Fig. 1 relate to corresponding elements in Fig. 2.
  • Fig. 2 it can be seen that the outlet opening 14 of feed duct 12 is located at a higher position than and is at an angle with respect to outlet opening 15 of duct 13 for the combustible gas. As a result, the air flow is able to penetrate the gas flow, with the result that they are mixed so as to form a combustible mixture.
  • Feed duct 13 is provided, just below the outlet opening 15, with a step-widening 16 which is obtained by a local narrowing of the partition 11.
  • the step widening 16 is adjoined by a gradual widening 17 in the direction of the outlet opening 15.
  • a turbulence chamber 18 is formed between the step widening 16, the gradual widening 17 and the outlet opening 15.
  • an intensive turbulent movement which extends to just above the outlet opening 15, is imparted to part of the gas flow, with the result that it entrains combustion air from duct 12.
  • a rich combustible mixture which has a low velocity component in the main direction of flow through combustion chamber 2 is formed in the turbulence chamber 18.
  • the invention is not limited to the design illustrated.
  • preference is given to a ceramic burner in which two feed ducts 12 a and 12 b for combustion air are disposed symmetrically with respect to feed duct 13 for the combustible gas.
  • two partitions 11 a and 11 b are provided instead of the single partition 11 and there are two outlet openings 14 a and 14 b for the feed ducts 12 a and 12 b .
  • outlet opening(s) 14 or 14 a and 14 b ) for combustion air is/are divided into separate ports.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Combustion Of Fluid Fuel (AREA)
EP98962386A 1997-11-19 1998-11-18 Ceramic burner for gases and regenerative heat generator provided with the said burner Expired - Lifetime EP1046011B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1007581 1997-11-19
NL1007581A NL1007581C2 (nl) 1997-11-19 1997-11-19 Keramische brander voor gassen en regeneratieve warmtegenerator voorzien daarvan.
PCT/EP1998/007540 WO1999026020A1 (en) 1997-11-19 1998-11-18 Ceramic burner for gases and regenerative heat generator provided with the said burner

Publications (2)

Publication Number Publication Date
EP1046011A1 EP1046011A1 (en) 2000-10-25
EP1046011B1 true EP1046011B1 (en) 2001-10-17

Family

ID=19766038

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98962386A Expired - Lifetime EP1046011B1 (en) 1997-11-19 1998-11-18 Ceramic burner for gases and regenerative heat generator provided with the said burner

Country Status (13)

Country Link
EP (1) EP1046011B1 (zh)
CN (1) CN1126910C (zh)
AR (1) AR017186A1 (zh)
AU (1) AU735282B2 (zh)
DE (1) DE69802116T2 (zh)
HU (1) HUP0100067A3 (zh)
NL (1) NL1007581C2 (zh)
PL (1) PL340596A1 (zh)
RU (1) RU2208201C2 (zh)
SK (1) SK7532000A3 (zh)
UA (1) UA49099C2 (zh)
WO (1) WO1999026020A1 (zh)
ZA (1) ZA9810588B (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1990575A1 (en) * 2007-05-07 2008-11-12 Paul Wurth Refractory & Engineering GmbH Ceramic burner
EP2233836B1 (de) 2009-03-23 2015-07-29 Siemens Aktiengesellschaft Drallerzeuger, Verfahren zum Vermeiden von Flammenrückschlag in einem Brenner mit wenigstens einem Drallerzeuger und Brenner
LU91572B1 (en) * 2009-05-20 2010-11-22 Wurth Paul Sa Method for operating a regenerative heater.
US9896735B2 (en) 2009-11-26 2018-02-20 Linde Aktiengesellschaft Method for heating a blast furnace stove
US20120214115A1 (en) * 2011-02-22 2012-08-23 Cameron Andrew M Method for heating a blast furnace stove
US9151492B2 (en) 2011-02-22 2015-10-06 Linde Aktiengesellschaft Heating apparatus
JP4955117B1 (ja) * 2011-03-15 2012-06-20 新日鉄エンジニアリング株式会社 炉頂燃焼式熱風炉
JP4892107B1 (ja) * 2011-03-23 2012-03-07 新日鉄エンジニアリング株式会社 炉頂燃焼式熱風炉
EP2584052A1 (en) * 2011-10-19 2013-04-24 Paul Wurth S.A. Method of operating regenerative heaters in blast furnace plant
DE102021111187A1 (de) * 2021-05-14 2022-11-17 Enertech Gmbh Wasserstoff-Gasbrennervorrichtung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1202797A (fr) * 1958-07-16 1960-01-13 Genevet Groll & Cie Brûleur à gaz
NL6900740A (zh) * 1969-01-16 1970-07-20
NL7003722A (zh) * 1970-03-16 1971-09-20
US3837793A (en) * 1971-05-10 1974-09-24 Koninklijke Hoogovens En Staal Ceramic burner for use in an air-preheater or hot blast stove for a blast furnace plant
DE2700786C3 (de) * 1977-01-11 1980-05-14 Hermann Rappold & Co Gmbh, 5160 Dueren Keramischer Gasbrenner für Winderhitzer
EP0090096B1 (en) 1982-03-30 1985-05-08 Hoogovens Groep B.V. A ceramic burner for gas, particularly for a hot-blast stove for a blast furnace
NL8702036A (nl) * 1987-08-31 1989-03-16 Hoogovens Groep Bv Keramische brander voor gas voor een brandschacht van een windverhitter van een hoogoven.

Also Published As

Publication number Publication date
HUP0100067A3 (en) 2001-12-28
AU735282B2 (en) 2001-07-05
DE69802116T2 (de) 2002-06-20
NL1007581C2 (nl) 1999-05-20
CN1282408A (zh) 2001-01-31
AR017186A1 (es) 2001-08-22
SK7532000A3 (en) 2001-03-12
UA49099C2 (uk) 2002-09-16
EP1046011A1 (en) 2000-10-25
HUP0100067A2 (hu) 2001-06-28
CN1126910C (zh) 2003-11-05
RU2208201C2 (ru) 2003-07-10
WO1999026020A1 (en) 1999-05-27
AU1756899A (en) 1999-06-07
DE69802116D1 (de) 2001-11-22
PL340596A1 (en) 2001-02-12
ZA9810588B (en) 1999-05-25

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