EP3569927B1 - Burner device with pulsed air/gas pre-mix - Google Patents

Burner device with pulsed air/gas pre-mix Download PDF

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Publication number
EP3569927B1
EP3569927B1 EP19175468.8A EP19175468A EP3569927B1 EP 3569927 B1 EP3569927 B1 EP 3569927B1 EP 19175468 A EP19175468 A EP 19175468A EP 3569927 B1 EP3569927 B1 EP 3569927B1
Authority
EP
European Patent Office
Prior art keywords
burner
air
lamellar
plates
gas
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.)
Active
Application number
EP19175468.8A
Other languages
German (de)
French (fr)
Other versions
EP3569927A1 (en
EP3569927C0 (en
Inventor
Yves Cazard
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.)
Yahtec
Original Assignee
Yahtec
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Filing date
Publication date
Priority claimed from FR1870577A external-priority patent/FR3081212A1/en
Application filed by Yahtec filed Critical Yahtec
Publication of EP3569927A1 publication Critical patent/EP3569927A1/en
Application granted granted Critical
Publication of EP3569927C0 publication Critical patent/EP3569927C0/en
Publication of EP3569927B1 publication Critical patent/EP3569927B1/en
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    • 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
    • F23D14/36—Burners specially adapted for use with means for pressurising the gaseous fuel or the combustion air in which the compressor and burner form a single unit
    • 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
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • 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
    • F23D14/70—Baffles or like flow-disturbing devices
    • 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
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/006—Air heaters using fluid fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2241/00—Applications
    • F23N2241/02—Space-heating

Definitions

  • the subject of the present invention is a pulsed air/gas premix burner device.
  • Air stream burners intended to directly heat a constant flow of air, from which the oxygen necessary for combustion is taken, are known.
  • the mixture is carried out at the level of perforated sheets arranged downstream of the gas injection, configured in a V and which act as a flame stabilizer.
  • the gas flow is more or less increased and the flame develops inside the V.
  • the flame is short at low power and long, exceeding the V of the plates, at high power.
  • Such a burner may have the disadvantage of not achieving stoichiometric combustion.
  • Premix burners are also known, comprising a supply system capable of producing an air/gas mixture in the desired proportions, and of injecting this mixture into the burner, with the advantage of good efficiency and therefore low pollutant emissions.
  • a supply system capable of producing an air/gas mixture in the desired proportions, and of injecting this mixture into the burner, with the advantage of good efficiency and therefore low pollutant emissions.
  • Such a burner is described in the document EP 0560454 A2 .
  • the object of the present invention is to propose a burner device with a new type of pulsed air/gas pre-mixture, making it possible to remedy the various drawbacks of the being of the technique, and to obtain perfect combustion, whatever the level of power.
  • the pulsed air/gas premix burner device comprises a lamellar burner associated with a flame stabilizer, arranged in an air stream, and supplied with an air/gas mixture produced in a mixing system disposed externally to said air stream, said mixing system disposed externally to said air stream comprising a centrifugal fan fed by the center on the one hand with gas and on the other hand with combustion air, and comprising at the periphery an ejection duct for the mixture obtained, connected with a lamellar burner.
  • Said lamellar burner consists of a stack of regularly spaced plates, one out of two of which is perforated, and said flame stabilizer is in the form of two plates configured in a V and widening out from said lamellar burner. Said plates are spaced apart so that the non-perforated ones do not block the perforations of the adjacent plate, to allow the combustion of the air-gas mixture.
  • the lamellar burner allows perfect combustion to be obtained, while from 50% to 100% of power, this perfect combustion is obtained by the development of the flame partially on the lamellar burner and on the two perforated V plates.
  • a burner device 1 arranged in an air stream 2 downstream of a centrifugal fan 20.
  • This fan 20 is supplied with air AF which it blows in the direction of the burner device 1, in order to produce, downstream of the burner 1, heated air AR.
  • a mixing system 3 which comprises a centrifugal fan 30 fed by the center on the one hand with gas G and on the other hand with combustion air AC, and comprising on the periphery a duct 31 for ejection of the mixture obtained M, connected to the burner device 1.
  • the burner device 1 comprises a lamellar burner 10 associated with a flame stabilizer 11 which is in the form of two sheets 12 and 13 configured in a V, which flare out from the lamellar burner 10 towards the outside of the air stream 2.
  • the lamellar burner 10 consists of stacked plates, one out of two of which is perforated. The plates are spaced between them so that the non-perforated ones do not block the perforations of the adjacent plate, to allow the combustion of the air-gas mixture.
  • the duct 31 leads to the lamellar burner 10 on a perforated plate, perpendicular to the latter, the combustion taking place at the periphery of the plates.
  • the lamellar burner 10/flame stabilizer 11 combination makes it possible to obtain a short flame, protected from turbulence by the perforated plates 12 and 13.
  • the combustion obtained is better, with less power, while the combustion at the periphery allows the plates to remain at a temperature below 400° C., unlike existing burner devices where combustion takes place on the burner; here the lamellar burner 10 does not overheat and deteriorates less over time.

Description

La présente invention a pour objet un dispositif de bruleur à pré-mélange air/gaz pulsé.The subject of the present invention is a pulsed air/gas premix burner device.

On connaît les brûleurs à veine d'air destinés à chauffer directement un flux constant d'air, dans lequel est prélevé l'oxygène nécessaire à la combustion. Le mélange est réalisé au niveau de tôles perforées disposées en aval de l'injection de gaz, configurées en un V et qui servent de stabilisateur de flamme.Air stream burners intended to directly heat a constant flow of air, from which the oxygen necessary for combustion is taken, are known. The mixture is carried out at the level of perforated sheets arranged downstream of the gas injection, configured in a V and which act as a flame stabilizer.

Pour faire moduler la puissance, on augmente plus ou moins le débit de gaz et la flamme se développe à l'intérieur du V.To modulate the power, the gas flow is more or less increased and the flame develops inside the V.

La flamme est courte à petite puissance et longue, dépassant le V des tôles, en grande puissance. Un tel bruleur peut présenter l'inconvénient de ne pas atteindre une combustion stoechiométrique.The flame is short at low power and long, exceeding the V of the plates, at high power. Such a burner may have the disadvantage of not achieving stoichiometric combustion.

On connaît aussi les brûleurs à pré-mélange, comprenant un système d'alimentation apte à réaliser un mélange air/gaz dans les proportions souhaitées, et à injecter ce mélange dans le bruleur, avec pour avantage un bon rendement et donc une faible émission de polluants. Un tel brûleur est décrit dans le document EP 0560454 A2 .Premix burners are also known, comprising a supply system capable of producing an air/gas mixture in the desired proportions, and of injecting this mixture into the burner, with the advantage of good efficiency and therefore low pollutant emissions. Such a burner is described in the document EP 0560454 A2 .

La présente invention a pour but de proposer un dispositif de bruleur à pré-mélange air/gaz pulsé de type nouveau, permettant de remédier aux divers inconvénients de l'étant de la technique, et d'obtenir une combustion parfaite, quel que soit le niveau de puissance.The object of the present invention is to propose a burner device with a new type of pulsed air/gas pre-mixture, making it possible to remedy the various drawbacks of the being of the technique, and to obtain perfect combustion, whatever the level of power.

Le dispositif de bruleur à pré-mélange air/gaz pulsé selon l'invention comprend un bruleur lamellaire associé à un stabilisateur de flamme, disposés dans une veine d'air, et alimenté en un mélange air/gaz réalisé dans un système de mélange disposé extérieurement à ladite veine d'air, ledit système de mélange disposé extérieurement à ladite veine d'air comprenant un ventilateur centrifuge alimenté par le centre d'une part en gaz et d'autre part en air de combustion, et comportant en périphérie un conduit d'éjection du mélange obtenu, connecté au bruleur lamellaire. Ledit bruleur lamellaire est constitué d'un empilement de plaques régulièrement espacées, dont une sur deux est perforée, et ledit stabilisateur de flamme se présente sous la forme de deux tôles configurées en V et s'évasant à partir dudit bruleur lamellaire. Lesdites plaques sont espacées entre elles en sorte que les non perforées n'obturent pas les perforations de la plaque adjacente, pour permettre la combustion du mélange air-gaz.The pulsed air/gas premix burner device according to the invention comprises a lamellar burner associated with a flame stabilizer, arranged in an air stream, and supplied with an air/gas mixture produced in a mixing system disposed externally to said air stream, said mixing system disposed externally to said air stream comprising a centrifugal fan fed by the center on the one hand with gas and on the other hand with combustion air, and comprising at the periphery an ejection duct for the mixture obtained, connected with a lamellar burner. Said lamellar burner consists of a stack of regularly spaced plates, one out of two of which is perforated, and said flame stabilizer is in the form of two plates configured in a V and widening out from said lamellar burner. Said plates are spaced apart so that the non-perforated ones do not block the perforations of the adjacent plate, to allow the combustion of the air-gas mixture.

De la puissance minimale jusqu'à 50% de la puissance, le brûleur lamellaire permet d'obtenir une combustion parfaite, tandis que de 50% à 100% de la puissance, cette combustion parfaite est obtenue par le développement de la flamme partiellement sur le brûleur lamellaire et sur les deux plaques en V perforées.From minimum power to 50% of power, the lamellar burner allows perfect combustion to be obtained, while from 50% to 100% of power, this perfect combustion is obtained by the development of the flame partially on the lamellar burner and on the two perforated V plates.

Les avantages et les caractéristiques du dispositif de bruleur selon l'invention ressortiront plus clairement de la description qui suit et qui se rapporte au dessin annexé, lequel en représente, sur une figure unique, une vue schématique et en perspective.The advantages and characteristics of the burner device according to the invention will emerge more clearly from the description which follows and which relates to the appended drawing, which represents, in a single figure, a diagrammatic and perspective view thereof.

Sur cette figure, on peut voir un dispositif de bruleur 1 selon l'invention, disposé dans une veine d'air 2 en aval d'un ventilateur centrifuge 20. Ce ventilateur 20 est alimenté en air AF qu'il souffle en direction du dispositif de bruleur 1, afin de produire, en aval du bruleur 1, un air réchauffé AR.In this figure, one can see a burner device 1 according to the invention, arranged in an air stream 2 downstream of a centrifugal fan 20. This fan 20 is supplied with air AF which it blows in the direction of the burner device 1, in order to produce, downstream of the burner 1, heated air AR.

Extérieurement à la veine d'air 2, est disposé un système de mélange 3, qui comprend un ventilateur centrifuge 30 alimenté par le centre d'une part en gaz G et d'autre part en air de combustion AC, et comportant en périphérie un conduit 31 d'éjection du mélange obtenu M, connecté au dispositif de bruleur 1.Outside the air stream 2, is arranged a mixing system 3, which comprises a centrifugal fan 30 fed by the center on the one hand with gas G and on the other hand with combustion air AC, and comprising on the periphery a duct 31 for ejection of the mixture obtained M, connected to the burner device 1.

Le dispositif de bruleur 1 selon l'invention comprend un bruleur lamellaire 10 associé à un stabilisateur de flamme 11 qui se présente sous la forme de deux tôles 12 et 13 configurées en V, qui s'évasent à partir du bruleur lamellaire 10 vers l'extérieur de la veine d'air 2.The burner device 1 according to the invention comprises a lamellar burner 10 associated with a flame stabilizer 11 which is in the form of two sheets 12 and 13 configured in a V, which flare out from the lamellar burner 10 towards the outside of the air stream 2.

Le bruleur lamellaire 10 est constitué de plaques empilées, dont une sur deux est perforée. Les plaques sont espacées entre elles en sorte que les non perforées n'obturent pas les perforations de la plaque adjacente, pour permettre la combustion du mélange air-gaz.The lamellar burner 10 consists of stacked plates, one out of two of which is perforated. The plates are spaced between them so that the non-perforated ones do not block the perforations of the adjacent plate, to allow the combustion of the air-gas mixture.

Le conduit 31 débouche sur le bruleur lamellaire 10 sur une plaque perforée, perpendiculairement à celle-ci, la combustion se faisant en périphérie des plaques.The duct 31 leads to the lamellar burner 10 on a perforated plate, perpendicular to the latter, the combustion taking place at the periphery of the plates.

La combinaison bruleur lamellaire 10 / stabilisateur de flamme 11, permet d'obtenir une flamme courte, protégée des turbulences par les tôles perforées 12 et 13.The lamellar burner 10/flame stabilizer 11 combination makes it possible to obtain a short flame, protected from turbulence by the perforated plates 12 and 13.

La combustion obtenue est meilleure, avec moins de puissance, tandis que la combustion en périphérie permet aux plaques de rester à une température en-dessous des 400°C contrairement aux dispositifs de bruleur existants où la combustion se fait sur le bruleur; ici le brûleur lamellaire 10 ne surchauffe pas et se détériore moins avec le temps.The combustion obtained is better, with less power, while the combustion at the periphery allows the plates to remain at a temperature below 400° C., unlike existing burner devices where combustion takes place on the burner; here the lamellar burner 10 does not overheat and deteriorates less over time.

Claims (2)

  1. A burner device (1) having a pulsed air/gas premix, comprising a lamellar burner (10) associated with a flame stabilizer (11), both of which are arranged in an air stream (2), and supplied with an air/gas mixture produced in a mixing system (3) arranged external to said air stream (2), said mixing system (3) arranged external to said air stream (2) comprising a centrifugal fan (30) supplied centrally with gas (G) and with combustion air (AC), and having at the periphery thereof a duct (31) for ejecting the obtained mixture (M), connected to the lamellar burner (10), wherein
    - said lamellar burner (10) consists of a stack of regularly spaced plates, where one of every two plates is perforated, and
    - said flame stabilizer (11) is provided in the form of two metal sheets (12, 13) arranged in a V which flare out from said lamellar burner (10),
    and wherein said plates are spaced apart such that the non-perforated plates do not obstruct the perforations of the adjacent plate, thus enabling combustion of the air-gas mixture.
  2. The burner device (1) according to claim 1, wherein the duct (31) for ejecting the mixture opens onto the lamellar burner (10) on a perforated plate, perpendicularly thereto.
EP19175468.8A 2018-05-18 2019-05-20 Burner device with pulsed air/gas pre-mix Active EP3569927B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1870577A FR3081212A1 (en) 2018-05-18 2018-05-18 AIR / GAS PULSE PRE-MIXING BURNER DEVICE
FR1857637A FR3081210B1 (en) 2018-05-18 2018-08-24 AIR / PULSE GAS PRE-MIX BURNER DEVICE

Publications (3)

Publication Number Publication Date
EP3569927A1 EP3569927A1 (en) 2019-11-20
EP3569927C0 EP3569927C0 (en) 2023-07-26
EP3569927B1 true EP3569927B1 (en) 2023-07-26

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EP19175468.8A Active EP3569927B1 (en) 2018-05-18 2019-05-20 Burner device with pulsed air/gas pre-mix

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3051464A (en) * 1958-10-20 1962-08-28 Maxon Premix Burner Company Air-heating gas burner
NL9200460A (en) * 1992-03-12 1993-10-01 Flameco Eclipse Bv GAS BURNER, COMBUSTION FOR COMBUSTION AIR AND FLAMMABLE GAS, BOILER INSTALLATION AND HEATING INSTALLATION, PROVIDED WITH SUCH A GAS BURNER AND MIXER.
US6921261B2 (en) * 2000-09-28 2005-07-26 Maxon Corporation Air-heating gas burner
KR101428542B1 (en) * 2013-01-18 2014-08-11 주식회사 경동나비엔 Combustor with air intake preheater
GB201401045D0 (en) * 2014-01-22 2014-03-05 Caledonian Control Technology Ltd Flame Screen Assembly

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Publication number Publication date
EP3569927A1 (en) 2019-11-20
EP3569927C0 (en) 2023-07-26

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