EP0313469B1 - Gasbrenner zur Heizung eines Luftstromes oder eines anderen sauerstoffhaltigen Gases - Google Patents

Gasbrenner zur Heizung eines Luftstromes oder eines anderen sauerstoffhaltigen Gases Download PDF

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Publication number
EP0313469B1
EP0313469B1 EP88402659A EP88402659A EP0313469B1 EP 0313469 B1 EP0313469 B1 EP 0313469B1 EP 88402659 A EP88402659 A EP 88402659A EP 88402659 A EP88402659 A EP 88402659A EP 0313469 B1 EP0313469 B1 EP 0313469B1
Authority
EP
European Patent Office
Prior art keywords
gas
burner
tube
nozzles
nozzle
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
EP88402659A
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English (en)
French (fr)
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EP0313469A1 (de
Inventor
Maurice Idoux
Pierre Cantryn
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.)
Entreprise Generale de Chauffage Industriel Pillard SA
Original Assignee
MECANIQUE GENERALE FOYERS-TURBINE
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 MECANIQUE GENERALE FOYERS-TURBINE filed Critical MECANIQUE GENERALE FOYERS-TURBINE
Priority to AT88402659T priority Critical patent/ATE59452T1/de
Publication of EP0313469A1 publication Critical patent/EP0313469A1/de
Application granted granted Critical
Publication of EP0313469B1 publication Critical patent/EP0313469B1/de
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
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • 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
    • 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
    • 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
    • F23D14/34—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air
    • 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 
    • F23C2201/00—Staged combustion
    • F23C2201/20—Burner staging
    • 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 
    • F23C2201/00—Staged combustion
    • F23C2201/30—Staged fuel supply

Definitions

  • the present invention relates to a burner intended to be placed in a duct for heating air or another oxidizing gas circulating at high speed in said duct and essentially consisting of a tube supplied with combustible gas and pierced with holes, possibly provided with injectors, making it possible to emit jets of combustible gas directed downstream, and deflectors fixed on said tube and serving to divert the current of oxidizing gas to create downstream of the ramp a protected area where the flame can develop .
  • the object of the present invention is to remedy this drawback by ensuring a practically constant aeration rate of the air-fuel mixture, despite variations in the fuel flow rate and / or the speed of the gas to be heated.
  • the burner which is the subject of the present invention is characterized in that it comprises, downstream of each hole or injector and coaxially with it, a convergent-diverging nozzle arranged so that the jet of combustible gas coming from said hole or injector creates a depression at the inlet of the nozzle, and in that the inlet of the nozzle is placed in communication with the interior space of said duct surrounding the burner by at least one opening arranged so as to eliminate the influence of the dynamic pressure of the gas to be heated on the flow of oxidizing gas sucked by the nozzle through said opening.
  • the space between the tube and the nozzles is closed by two wall elements fixed to the tube and arranged substantially parallel to the plane containing the axes of the nozzles, on either side thereof, and by a front wall connected to said wall elements and carrying the nozzles, and openings are drilled in said wall elements.
  • Said front wall may advantageously be constituted by two wall elements converging downstream and forming a dihedral whose edge is located in the plane of the axes of the nozzles.
  • the deflectors can be connected to said wall elements and stiffening ribs can be provided to connect the deflectors to said front wall and to the nozzles.
  • the tube can advantageously be fitted with injectors whose position is adjustable so that the distance from each injector to the neck of the respective nozzle can be varied.
  • part of the air necessary for combustion may be supplied by a sheath surrounding said tube and formed, in part, by the flame stabilizer.
  • this auxiliary fuel gas injection may be carried out by means of one or two tubes pierced with holes or provided with injectors, placed on one side of the burner or on either side thereof, respectively, and connected to the main gas supply tube.
  • the flame stabilizer will advantageously have a modular construction.
  • the burner of FIGS. 1 and 2 consists of a tube 10 arranged transversely in a duct whose cross section is clearly greater than that of said tube and through which air or another oxygen-containing gas circulates, in the direction indicated by arrow A, and a flame stabilizer 12 fixed to the tube 10, at the front thereof.
  • the tube 10 is connected to a source of pressurized combustible gas and is pierced with calibrated holes 14 through which jets of combustible gas are emitted downstream, in a direction parallel to the direction of flow of the gas to be heated (arrow AT).
  • the stabilizer 12 comprises two divergent wings 16 forming deflectors which are connected to the tube 10 by wall elements 18 parallel to the direction of flow of the gas stream to be heated; the wings 16 have at their downstream end a break in the profile making it possible to stiffen them.
  • the space at the front of the tube 10 is closed by a front wall formed by two converging wall elements 20 which delimit with the tube a chamber 22.
  • This chamber can be closed at both ends of the burner by walls perpendicular to the axis of the tube and can be divided by partitions parallel to these walls.
  • Holes 24 drilled in the wall elements 18 communicate the chamber 22 with the interior space of the conduit where the gas to be heated circulates.
  • Convergent-divergent nozzles 26 are mounted on the wall elements 20, coaxially with the holes 14 of the tube 10, the axes of the nozzles defining a plane parallel to the direction of flow of the air to be heated.
  • the assembly can be reinforced by ribs 28 and 30.
  • the various components of the stabilizer can be assembled by welding.
  • the stabilizer can also be formed from identical modular elements fixed side by side on the tube 10, for example by welding, each modular element being in one piece from the foundry.
  • the energy of the jets of combustible gas coming from the orifices 14 is used to draw a certain flow of air or of oxidizing gas, through the openings 24, and produce a flammable mixture which burns at the outlet of the nozzles . Thanks to this construction, a premix of the air or of the oxidizing gas and of the combustible gas upstream of the nozzle is avoided and any risk of combustion in this zone is eliminated and, consequently, the walls of the chamber 22 are overheated and the carbon black deposit.
  • the ratio of the quantity of oxidizing gas sucked to the quantity of oxidizing gas necessary for complete combustion which is called aeration rate when the oxidizing gas is air, depends on the diameter of the orifices 14, on the diameter of the throat of the nozzle and the distance from the orifices to the throat of the nozzle but it varies little when the flow of combustible gas is modified; this rate can be fixed by construction at an optimal value.
  • the tube 10 can be fitted with injectors whose distance from the throat of the nozzles is adjustable so as to be able to adjust the ventilation rate, for example to modify the diameter and / or the length of the flame.
  • the dynamic pressure of the air has practically no influence on the ventilation rate and the operation of the burner is not disturbed by variations in the speed of the air stream or of the oxidizing mixture.
  • Other means in particular the use of deflectors placed upstream of the openings 24, could be provided to eliminate the influence of the dynamic pressure of the gas to be heated on the flow of gas sucked through the nozzles.
  • FIG. 3 shows, in cross section, an embodiment of the burner of the invention usable when the gas to be heated has a relatively low oxygen content.
  • a fraction of the air necessary for combustion is supplied by a sheath 40 formed, in part, by the wall elements 18 'and 20' of the stabilizer 12 'and, in part, by a semi-cylindrical shell 42.
  • the gas supply tube 10 ′ is housed inside the sheath 40 and is fitted with injectors 44.
  • FIG. 4 shows a modified form of the burner of FIG. 1 which makes it possible to keep the nitrogen oxide content of the heated gases at a particularly low value.
  • a single row of pipes is provided on one side of the burner, but they could be arranged on either side of the burner.
  • the injection of part of the combustible gas at the front of the burner could be carried out by means of one or two tubes pierced with holes or fitted with injectors, arranged parallel to the tube 10 ", near the edge of one of the wings or of the two wings, respectively, of the flame stabilizer, outside of the latter, and connected to the tube 10 ".

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)
  • Incineration Of Waste (AREA)

Claims (8)

1. Quer in einer Leitung angeordneter Brenner zur Erhitzung eines mit hoher Geschwindigkeit in dieser Leitung zirkulierenden sauerstofftragenden Gases, bestehend aus einem mit Brenngas gespeisten und mit Löchern sowie gegebenenfalls mit Injektoren versehenen Rohr zur Abgabe von in Ausströmrichtung gerichteten Gasstrahlen und einem Flammenstabilisator mit zwei als Deflektor wirkenden und eine von dem zu erhitzenden Gasstrom abgeschirmte Zone abgrenzenden divergenten Flügeln, dadurch gekennzeichnet, dass jedem Loch (14, 14") oder Injektor (44) in koaxialer Richtung eine konvergente-divergente Düse (26, 26', 26") nachgeschaltet ist, welche derart ausgelegt ist, dass der aus besagtem Loch bzw. Injektor austretende Gasstrahl am Düseneingang einen Unterdruck bildet, und dass der Düseneingang mit dem den Brenner umgebenden Innenraum besagter Leitung durch mindestens eine Öffnung (24, 24', 24") in Verbindung steht, welche so angeordnet ist, dass die Beeinflussung der von der Düse durch besagte Öffnung angesaugten Gasmenge durch den dynamischen Druck des zu erhitzenden Gases fortfällt.
2. Brenner gemäss Anspruch 1, dadurch gekennzeichnet, dass der Raum zwischen den Düsen (26) und dem Rohr (10) durch zwei auf dem Rohr befestigte und ungefähr parallel zu der die Mittellinien der Düsen enthaltenen Ebene angeordnete Wandelemente (18) und eine an besagte Wandelemente anschliessende und die Düsen tragende Stirnwand (20) abgeschlossen wird, und dass sich die Öffnungen (24) in besagten Wandelementen befinden.
3. Brenner gemäss Anspruch 1, dadurch gekennzeichnet, dass besagtes Rohr (10') von einem Luftzufuhrkanal (40) umgeben wird, dessen Wand teilweise von zwei ungefähr parallel zu der die Mittellinien der Düsen enthaltenen Ebene angeordneten Wandelementen (18') sowie einer die Düsen (26') tragenden Stirnwand (20') gebildet wird, und dass sich die Öffnungen (24') in besagten Wandelementen befinden.
4. Brenner gemäss Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass er Mittel (50) zur Abzweigung eines Teils der besagtes Rohr (10") speisenden Gesamtbrenngasmenge und zu dessen Einspritzung in die Brennerflamme umfasst.
5. Brenner gemäss Anspruch 4, dadurch gekennzeichnet, dass besagte Einspritzmittel aus an besagtem Rohr (10") angeschlossenen Stutzen (50) bestehen, deren Ende sich praktisch auf der Ebene des Randes der Flügel des Flammenstabilisators (12") und ausserhalb letzterem befindet.
6. Brenner gemäss Anspruch 2 oder 3, dadurch gekennzeichnet, dass besagte Stirnwand aus zwei Wandelementen (20, 20') besteht, die auslaufseitig konvergieren und ein Dieder bilden, dessen Kante in der Ebene der Mittellinien der Düsen liegt.
7. Brenner gemäss Anspruch 2, 3 oder 6, dadurch gekennzeichnet, dass die Flügel (16, 16') des Flammenstabilisators (12, 12') kraftschlüssig mit besagten Wandelementen (18, 18') verbunden sind.
8. Brenner gemäss irgendeinem der vorherigen Ansprüche, dadurch gekennzeichnet, dass der Flammenstabilisator (12, 12') von mehreren modularen nebeneinander auf besagtem Rohr (10, 10') befestigten Elementen gebildet wird, und dass jedes modulare Element eine oder mehrere Düsen trägt.
EP88402659A 1987-10-23 1988-10-21 Gasbrenner zur Heizung eines Luftstromes oder eines anderen sauerstoffhaltigen Gases Expired - Lifetime EP0313469B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88402659T ATE59452T1 (de) 1987-10-23 1988-10-21 Gasbrenner zur heizung eines luftstromes oder eines anderen sauerstoffhaltigen gases.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8714686A FR2622277B1 (fr) 1987-10-23 1987-10-23 Bruleur a gaz pour le chauffage d'un courant d'air ou autre gaz comburant
FR8714686 1987-10-23

Publications (2)

Publication Number Publication Date
EP0313469A1 EP0313469A1 (de) 1989-04-26
EP0313469B1 true EP0313469B1 (de) 1990-12-27

Family

ID=9356111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88402659A Expired - Lifetime EP0313469B1 (de) 1987-10-23 1988-10-21 Gasbrenner zur Heizung eines Luftstromes oder eines anderen sauerstoffhaltigen Gases

Country Status (10)

Country Link
US (1) US4895514A (de)
EP (1) EP0313469B1 (de)
JP (1) JPH01134107A (de)
KR (1) KR910004773B1 (de)
AT (1) ATE59452T1 (de)
CA (1) CA1326810C (de)
DE (1) DE3861454D1 (de)
ES (1) ES2019469B3 (de)
FR (1) FR2622277B1 (de)
GR (1) GR3001650T3 (de)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8824575D0 (en) * 1988-10-20 1988-11-23 Airoil Flaregas Ltd Improvements in burner assemblies
DE4119278C2 (de) * 1991-06-12 1994-08-04 Steinfath Walter Brennereinrichtung
CA2262954A1 (en) * 1998-02-24 1999-08-24 Beckett Gas, Inc. Burner nozzle
FR2804748B1 (fr) * 2000-02-04 2002-04-12 Pillard Chauffage Perfectionnement aux bruleurs a gaz pour le chauffage d'un gaz circulant dans un conduit
AUPR292401A0 (en) 2001-02-06 2001-03-01 Silverbrook Research Pty. Ltd. An apparatus and method (ART101)
US6929470B1 (en) * 2002-10-30 2005-08-16 Coen Company, Inc. Low NOx duct burner
GB2397644A (en) * 2003-01-23 2004-07-28 Kallis Haralambous Post-mixed gas burner
US20080145805A1 (en) * 2006-12-14 2008-06-19 Towler Gavin P Process of Using a Fired Heater
EP2218965A1 (de) * 2009-02-16 2010-08-18 Total Petrochemicals Research Feluy Brenner mit niedrigen NOx-Werten
FR3017445B1 (fr) * 2014-02-12 2019-05-24 Fives Pillard Module de bruleur en veine
TWI573966B (zh) * 2015-07-09 2017-03-11 Bahutong Entpr Ltd Company Gas fireplace and its diversion components

Family Cites Families (15)

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Publication number Priority date Publication date Assignee Title
US3051464A (en) * 1958-10-20 1962-08-28 Maxon Premix Burner Company Air-heating gas burner
US2970772A (en) * 1960-04-14 1961-02-07 Thomas H Boosinger Fuel nozzle anti-coking cap
US3178161A (en) * 1963-03-05 1965-04-13 Maxon Premix Burner Company In Air heating gas burner
US3187523A (en) * 1963-10-07 1965-06-08 Leggitt S H Co Flame shaper and luminosity control
US3297259A (en) * 1964-02-26 1967-01-10 Maxon Premix Burner Company In Air heating gas burner
US3494712A (en) * 1968-07-01 1970-02-10 Coen Co Duct burner
US3630499A (en) * 1969-10-31 1971-12-28 Frederick A Kramer Jr Burner
US3649211A (en) * 1970-02-05 1972-03-14 Coen Co Air augmented duct burner
US3689040A (en) * 1970-11-30 1972-09-05 Commercial Propane Corp Portable space heater and gas burner for the same
US3732059A (en) * 1971-05-28 1973-05-08 Zink Co John Burner for gaseous fuels in reduced oxygen and/or significant velocity atmosphere
FR2157066A5 (de) * 1971-10-15 1973-06-01 Bertin & Cie
US3843309A (en) * 1973-03-07 1974-10-22 Gen Electric Liquid fuel grid burner for vitiated air using auxiliary combustion air
JPS6042250Y2 (ja) * 1981-05-21 1985-12-25 リンナイ株式会社 ガス赤外線バ−ナの給気装置
JPS59219612A (ja) * 1983-05-27 1984-12-11 Mitsubishi Heavy Ind Ltd ガス焚きダクトバ−ナ装置
US4767319A (en) * 1987-03-27 1988-08-30 Coen Company Duct burner

Also Published As

Publication number Publication date
JPH0549888B2 (de) 1993-07-27
FR2622277B1 (fr) 1990-02-23
ES2019469B3 (es) 1991-06-16
US4895514A (en) 1990-01-23
CA1326810C (fr) 1994-02-08
FR2622277A1 (fr) 1989-04-28
JPH01134107A (ja) 1989-05-26
ATE59452T1 (de) 1991-01-15
KR910004773B1 (ko) 1991-07-13
EP0313469A1 (de) 1989-04-26
GR3001650T3 (en) 1992-11-23
DE3861454D1 (de) 1991-02-07
KR890007021A (ko) 1989-06-17

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