EP0014221A1 - Brûleur tunnel à gaz destiné à porter des fours de fusion ou des creusets à la température voulue - Google Patents

Brûleur tunnel à gaz destiné à porter des fours de fusion ou des creusets à la température voulue Download PDF

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Publication number
EP0014221A1
EP0014221A1 EP79100324A EP79100324A EP0014221A1 EP 0014221 A1 EP0014221 A1 EP 0014221A1 EP 79100324 A EP79100324 A EP 79100324A EP 79100324 A EP79100324 A EP 79100324A EP 0014221 A1 EP0014221 A1 EP 0014221A1
Authority
EP
European Patent Office
Prior art keywords
gas
gas supply
burner
housing
supply pipe
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.)
Granted
Application number
EP79100324A
Other languages
German (de)
English (en)
Other versions
EP0014221B1 (fr
Inventor
Karl Niemann
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.)
Elster Kromschroeder GmbH
Original Assignee
G Kromschroeder AG
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 G Kromschroeder AG filed Critical G Kromschroeder AG
Priority to DE7979100324T priority Critical patent/DE2965172D1/de
Priority to EP19790100324 priority patent/EP0014221B1/fr
Publication of EP0014221A1 publication Critical patent/EP0014221A1/fr
Application granted granted Critical
Publication of EP0014221B1 publication Critical patent/EP0014221B1/fr
Expired 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

Definitions

  • the invention relates to a gas-heated burner for tempering melting furnaces or crucibles, comprising: a jacket-shaped burner housing which forms an outlet opening, a gas supply pipe which is arranged coaxially to the burner housing and is throttled at its outlet by throttling means and has a radially projecting, annular projection at its end and upstream of this approach has lateral gas outlet openings, and a connection at the end of the burner housing facing away from the outlet opening for connection to air supply means, which is in an essentially unthrottled connection with the annular space formed between the gas supply pipe and the burner housing.
  • the tubular burner housing contains a part which is slightly conically widened towards an outlet opening and which is followed by a frustoconical part which tapers towards the outlet opening. This latter part is in turn followed by a cylindrical end piece forming the outlet opening.
  • the burner housing is divided by an intermediate wall, which is in the connecting plane between the expanding and the tapered part of the burner housing sits and has a central opening.
  • a gas feed pipe is located on the intermediate wall coaxially with the burner housing.
  • An air guide tube sits coaxially within this gas supply tube and surrounds the central opening in the intermediate wall.
  • An annular space is formed between the gas supply pipe and the frustoconical part of the burner housing.
  • At the outlet end of the gas supply pipe there is a radial flange which projects outwards into the annular space and forms a throttling outlet gap with the burner housing.
  • the air guide tube also has a radial flange at its outlet end, which also forms a throttled annular gap with the gas supply tube.
  • an annular space is formed between the air guide pipe and the gas supply pipe, into which a gas feed line opens. Openings are provided in the intermediate wall — outside the gas supply pipe, via which openings the part of the space formed in the burner housing upstream of the intermediate wall is connected to the annular space that is formed between the gas supply pipe and the burner housing.
  • a connection is provided via which air supply means, for example a fan, can be connected.
  • an air flow mainly passes through the central opening of the intermediate wall and through the air supply pipe into the combustion chamber formed within the frustoconical part of the burner housing. Gas is throttled through the annular gap that is formed between the gas feed pipe and the radial flange of the air feed pipe. Finally, a further air flow passes through the outer openings in the intermediate wall, the outer annular chamber which acts as a calming zone and the annular gap between the radial flange G aszuschreibrohres and the burner housing into the combustion chamber and is directed by the frustoconical portion of the burner housing inwardly.
  • Mixing of gas and air is to take place in the toroidal area that emerges in front of the gas supply pipe and the air supply pipe around the longitudinal axis of the tunnel burner, and from this area the flame extends into the combustion chamber, the flame being jacket-shaped and on the one hand the surrounds the central air flow and on the other hand is surrounded by the external air flow that runs between the flame and the wall of the burner housing.
  • a burner is also known in which a gas supply pipe is arranged coaxially within a burner pipe, air being able to be introduced into the burner pipe via a lateral connection, in such a way that the air flow within the burner pipe gives a swirl around the gas supply pipe becomes.
  • the burner tube extends somewhat beyond the gas feed tube in the axial direction.
  • the gas supply pipe forms a gas supply channel that fills its entire cross section. At its end, the gas supply tube forms a central, throttling outlet nozzle.
  • the gas supply pipe continues to have a radial flange upstream of this outlet nozzle. Lateral gas outlet openings are provided in the gas supply pipe upstream of the radial flange. The air flow builds up on the radial flange.
  • the throttling outlet nozzle causes a certain gas jam in front of this nozzle. Gas therefore enters through the lateral gas outlet openings into the calming zone formed upstream of the radial flange.
  • the gas-air mixture formed there creates a holding flame that burns around the radial flange and prevents the flame from lifting off when there are high gas and air flows.
  • the escaping gas is ignited immediately by the flame.
  • the flame is the zone in which a chemical reaction takes place between the gas and the combustion air. If the gas is not completely burnt due to insufficient mixing of gas and air, unburned gas can accumulate in the melting furnace or crucible and lead to an explosion. This can also happen if the flame is so long that it extends to the opposite wall of the melting furnace or crucible. In addition, the heating would become uneven in such a case.
  • the flame should only burn within a combustion chamber formed in the burner housing, while only hot air and exhaust gases emerge from the outlet opening of the burner housing.
  • the amount of gas is regulated within very wide limits.
  • the flame must not be too long. It must also not take off or go out.
  • the radial flange on the gas supply pipe in this arrangement which belongs to the prior art, generates a holding flame which prevents the flame from being lifted off the outlet nozzle even at high gas speeds.
  • a straight, central gas stream emerges from the central outlet nozzle.
  • a strong, unthrottled air flow is generated around this central gas flow.
  • Mixing-promoting flow guide bodies ensure that swirling and mixing of gas and air takes place within the combustion chamber and that the combustion reaction can therefore take place completely within the combustion chamber.
  • An intimate mixture of air and exhaust gases emerges from the outlet opening and has a uniform temperature corresponding to the heating power of the supplied and burned gas.
  • This burner still requires a relatively long combustion chamber in which the mixing and swirling of gas and air takes place.
  • the invention has for its object to design a burner of the type defined in such a way that by other means, not by guide vanes or the like. in the combustion chamber, an intimate mixing of gas and air and a combustion with a short flame is guaranteed, whereby it is also ensured that the burner works properly over a large range of gas throughput, ie over a large range of heating power.
  • the burner contains a jacket-shaped burner housing 10, which forms an outlet opening 12.
  • a gas supply pipe 14 is provided coaxially with the burner housing.
  • connection 16 is in the annular space 18 formed between the gas supply pipe 14 and the burner housing 10 essentially unthrottled in connection.
  • the gas supply pipe 10 has a bend 20 at its inlet end and is then guided out of the side of the burner housing 10.
  • the gas supply pipe 14 has a radially projecting, annular extension 22 at its end. Upstream of this approach, lateral gas outlet openings 24 are provided in the gas supply pipe 14.
  • This ring-shaped extension 22 is formed by a flat-cylindrical housing 26 which is seated at the end of the gas supply pipe 14 and is arranged coaxially with it and projects radially beyond the gas supply pipe.
  • This housing 26 is penetrated by a ring of tubular channels 32, 34, 36 extending from the bottom 28 laterally of the gas supply pipe 14 to the top 30.
  • the housing 26 On the upper side 30, the housing 26 has a ring 38, 40, 42 of narrow gas outlet openings around each of these channels 32, 34, 36.
  • the housing 26 has on the top 28 a central gas outlet opening 44 aligned with the gas supply pipe 14.
  • the cross section of the central gas outlet opening 44 is significantly smaller than the cross section of each of the channels 32, 34, 36 passing through the housing 26.
  • the housing 26 is penetrated by three channels 32,34,36, which mutually angularly offset by 120 0 14 disposed around the axis of the gas supply pipe.
  • the burner housing 10 has a section 46 running inwardly in the shape of a truncated cone inward, closely downstream of the flat-cylindrical housing 26 seated on the gas supply pipe 14, and then has a cylindrical end piece 48 forming the outlet opening 12.
  • This design of the burner housing 10 is by the air flow flowing in the annular space 18 is directed inward downstream of the housing 26 in the area of the flames, as a result of which the mixing of the fuel gases with the air is further improved.

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)
EP19790100324 1979-02-03 1979-02-03 Brûleur tunnel à gaz destiné à porter des fours de fusion ou des creusets à la température voulue Expired EP0014221B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE7979100324T DE2965172D1 (en) 1979-02-03 1979-02-03 Gas heated tunnel burner for raising the temperature in melting furnaces or crucibles
EP19790100324 EP0014221B1 (fr) 1979-02-03 1979-02-03 Brûleur tunnel à gaz destiné à porter des fours de fusion ou des creusets à la température voulue

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19790100324 EP0014221B1 (fr) 1979-02-03 1979-02-03 Brûleur tunnel à gaz destiné à porter des fours de fusion ou des creusets à la température voulue

Publications (2)

Publication Number Publication Date
EP0014221A1 true EP0014221A1 (fr) 1980-08-20
EP0014221B1 EP0014221B1 (fr) 1983-04-13

Family

ID=8186077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790100324 Expired EP0014221B1 (fr) 1979-02-03 1979-02-03 Brûleur tunnel à gaz destiné à porter des fours de fusion ou des creusets à la température voulue

Country Status (2)

Country Link
EP (1) EP0014221B1 (fr)
DE (1) DE2965172D1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004189A1 (fr) * 1986-01-14 1987-07-16 Usinor Aciers Bruleur de prechauffage
EP0738854A3 (fr) * 1995-04-19 1997-09-17 Tokyo Gas Co Ltd Procédö et appareil de combustion à faibles émissions d'oxyde d'azote
EP0774621A3 (fr) * 1995-11-16 1997-09-17 Tokyo Gas Co Ltd Procédé et appareil de combustion à faibles émissions d'oxyde d'azote
US6918256B2 (en) 2002-02-13 2005-07-19 Alstom Technology Ltd Method for the reduction of combustion-driven oscillations in combustion systems and premixing burner for carrying out the method
WO2023093554A1 (fr) * 2021-11-23 2023-06-01 中国科学院大连化学物理研究所 Structure de mélange gaz-air et brûleur

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191111390A (en) * 1911-05-11 1912-05-02 Hugh Ernest Tollemache Improvements in Burners for Combustible Vapours and Gases.
US1440614A (en) * 1921-12-31 1923-01-02 Lee B Mettler Gas burner
US2854068A (en) * 1955-10-17 1958-09-30 Siemon Mfg Company Nozzle for gas burners
DE1223197B (de) * 1963-03-07 1966-08-18 Sulzer Ag Gasbrenner einer Gasturbinenbrennkammer
US3275057A (en) * 1964-07-01 1966-09-27 Hotwork Ltd Tunnel burners
GB1140561A (en) * 1964-11-10 1969-01-22 Gas Council Improvements in tunnel mixing burners
DE1936545A1 (de) * 1969-07-18 1971-01-28 Konink Nl Hoogovens En Staalfa Gasbrenner fuer metallurgische und/oder keramische OEfen
DE2115015A1 (de) * 1971-03-27 1972-09-28 Frohn, Josef, 5100 Aachen Gasbrennerdüse mit Stauscheibe für Schrumpfpackeinrichtungen
DE2428622A1 (de) * 1973-06-15 1975-01-09 O F R Officine Fratelli Riello Brennerkopf, insbesondere fuer gasfoermige brennstoffe
DE2548790A1 (de) * 1975-10-31 1977-05-05 Gaswaerme Inst E V Brennerkopf fuer gas-geblaesebrenner fuer alle gasarten
DE2806652A1 (de) * 1977-02-17 1978-08-24 Koennyueipari Szereloe Es Epit Mischer fuer gasfoermige verbrennungsmedien

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191111390A (en) * 1911-05-11 1912-05-02 Hugh Ernest Tollemache Improvements in Burners for Combustible Vapours and Gases.
US1440614A (en) * 1921-12-31 1923-01-02 Lee B Mettler Gas burner
US2854068A (en) * 1955-10-17 1958-09-30 Siemon Mfg Company Nozzle for gas burners
DE1223197B (de) * 1963-03-07 1966-08-18 Sulzer Ag Gasbrenner einer Gasturbinenbrennkammer
US3275057A (en) * 1964-07-01 1966-09-27 Hotwork Ltd Tunnel burners
GB1140561A (en) * 1964-11-10 1969-01-22 Gas Council Improvements in tunnel mixing burners
DE1936545A1 (de) * 1969-07-18 1971-01-28 Konink Nl Hoogovens En Staalfa Gasbrenner fuer metallurgische und/oder keramische OEfen
DE2115015A1 (de) * 1971-03-27 1972-09-28 Frohn, Josef, 5100 Aachen Gasbrennerdüse mit Stauscheibe für Schrumpfpackeinrichtungen
DE2428622A1 (de) * 1973-06-15 1975-01-09 O F R Officine Fratelli Riello Brennerkopf, insbesondere fuer gasfoermige brennstoffe
DE2548790A1 (de) * 1975-10-31 1977-05-05 Gaswaerme Inst E V Brennerkopf fuer gas-geblaesebrenner fuer alle gasarten
DE2806652A1 (de) * 1977-02-17 1978-08-24 Koennyueipari Szereloe Es Epit Mischer fuer gasfoermige verbrennungsmedien

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987004189A1 (fr) * 1986-01-14 1987-07-16 Usinor Aciers Bruleur de prechauffage
FR2592941A1 (fr) * 1986-01-14 1987-07-17 Usinor Aciers Bruleur de prechauffage
EP0231137A1 (fr) * 1986-01-14 1987-08-05 Usinor Aciers Brûleur de préchauffage
EP0738854A3 (fr) * 1995-04-19 1997-09-17 Tokyo Gas Co Ltd Procédö et appareil de combustion à faibles émissions d'oxyde d'azote
EP0774621A3 (fr) * 1995-11-16 1997-09-17 Tokyo Gas Co Ltd Procédé et appareil de combustion à faibles émissions d'oxyde d'azote
US6918256B2 (en) 2002-02-13 2005-07-19 Alstom Technology Ltd Method for the reduction of combustion-driven oscillations in combustion systems and premixing burner for carrying out the method
WO2023093554A1 (fr) * 2021-11-23 2023-06-01 中国科学院大连化学物理研究所 Structure de mélange gaz-air et brûleur

Also Published As

Publication number Publication date
EP0014221B1 (fr) 1983-04-13
DE2965172D1 (en) 1983-05-19

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