EP3569927B1 - Dispositif de bruleur à pré-mélange air/gaz pulsé - Google Patents
Dispositif de bruleur à pré-mélange air/gaz pulsé Download PDFInfo
- 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
Links
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 title 1
- 238000002485 combustion reaction Methods 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 13
- 239000003381 stabilizer Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims 1
- 239000007789 gas Substances 0.000 description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
Images
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
- F23D14/34—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.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Gas Burners (AREA)
Description
- La présente invention a pour objet un dispositif de bruleur à pré-mélange air/gaz pulsé.
- 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.
- Pour faire moduler la puissance, on augmente plus ou moins le débit de gaz et la flamme se développe à l'intérieur du 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.
- 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 . - 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
Claims (2)
- Dispositif de bruleur (1) à pré-mélange air/gaz pulsé comprenant un bruleur lamellaire (10) associé à un stabilisateur de flamme (11), disposés dans une veine d'air (2), et alimenté en un mélange air/gaz réalisé dans un système de mélange (3) disposé extérieurement à ladite veine d'air (2), ledit système de mélange (3) disposé extérieurement à ladite veine d'air (2) comprenant 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 bruleur lamellaire (10), dispositif dans lequel- ledit bruleur lamellaire (10) est constitué d'un empilement de plaques régulièrement espacées, dont une sur deux est perforée, et- ledit stabilisateur de flamme (11) se présente sous la forme de deux tôles (12, 13) configurées en V et s'évasant à partir dudit bruleur lamellaire (10), et dans lequel 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.
- Dispositif de bruleur (1) selon la revendication 1, dans lequel le conduit d'éjection du mélange (31) débouche sur le bruleur lamellaire (10) sur une plaque perforée, perpendiculairement à celle-ci.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1870577A FR3081212A1 (fr) | 2018-05-18 | 2018-05-18 | Dispositif de bruleur a pre-melange air/gaz pulse |
FR1857637A FR3081210B1 (fr) | 2018-05-18 | 2018-08-24 | Dispositif de bruleur a pre-melange air/gaz pulse |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3569927A1 EP3569927A1 (fr) | 2019-11-20 |
EP3569927B1 true EP3569927B1 (fr) | 2023-07-26 |
EP3569927C0 EP3569927C0 (fr) | 2023-07-26 |
Family
ID=66542160
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19175468.8A Active EP3569927B1 (fr) | 2018-05-18 | 2019-05-20 | Dispositif de bruleur à pré-mélange air/gaz pulsé |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP3569927B1 (fr) |
Family Cites Families (5)
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 (nl) * | 1992-03-12 | 1993-10-01 | Flameco Eclipse Bv | Gasbrander, menginrichting voor verbrandingslucht en brandbaar gas, ketelinstallatie en verwarminginstallatie, voorzien van een dergelijke gasbrander en menginrichting. |
WO2002027238A1 (fr) * | 2000-09-28 | 2002-04-04 | Maxon Corporation | Bruleur a gaz a chauffage d'air |
KR101428542B1 (ko) * | 2013-01-18 | 2014-08-11 | 주식회사 경동나비엔 | 급기 예열기를 구비한 연소장치 |
GB201401045D0 (en) * | 2014-01-22 | 2014-03-05 | Caledonian Control Technology Ltd | Flame Screen Assembly |
-
2019
- 2019-05-20 EP EP19175468.8A patent/EP3569927B1/fr active Active
Also Published As
Publication number | Publication date |
---|---|
EP3569927C0 (fr) | 2023-07-26 |
EP3569927A1 (fr) | 2019-11-20 |
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