EP1030107B1 - Brûleur à prémélange gazeux - Google Patents

Brûleur à prémélange gazeux Download PDF

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Publication number
EP1030107B1
EP1030107B1 EP00103279A EP00103279A EP1030107B1 EP 1030107 B1 EP1030107 B1 EP 1030107B1 EP 00103279 A EP00103279 A EP 00103279A EP 00103279 A EP00103279 A EP 00103279A EP 1030107 B1 EP1030107 B1 EP 1030107B1
Authority
EP
European Patent Office
Prior art keywords
slots
burner according
burner
diffuser element
intermediate region
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
EP00103279A
Other languages
German (de)
English (en)
Other versions
EP1030107A1 (fr
Inventor
Giuseppe Fogliani
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.)
Beckett Thermal Solutions SRL
Original Assignee
Worgas Bruciatori SRL
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 Worgas Bruciatori SRL filed Critical Worgas Bruciatori SRL
Publication of EP1030107A1 publication Critical patent/EP1030107A1/fr
Application granted granted Critical
Publication of EP1030107B1 publication Critical patent/EP1030107B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • F23D14/105—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head with injector axis parallel to the burner head axis
    • 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
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
    • 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
    • F23D2213/00—Burner manufacture specifications

Definitions

  • the invention concerns an improved burner, particularly a so-called modular blade burner.
  • a so-called modular blade burner is a burner provided with a plurality of burner bodies, each of which is a mixing and distributing element for a flow of a mixture of gaseous fuel and air.
  • Said burner bodies are bodies of modular type which may be arranged in bundles.
  • a Venturi tube is provided which opens into a chamber arranged at the outlet of the Venturi tube; said chamber being closed at its upper side by a diffuser provided with apertures, for instance shaped as slots, through which the mixture of gaseous fuel and air is discharged.
  • Longer slots are provided at regular intervals along the rows of slots, or at the end of each group of slots if the rows of slots are divided into sections; said longer slots having a length substantially equal to the width of two adjacent rows of slots, or groups of slots, plus the width of the central region comprised therebetween.
  • the function of said longer slots is to limit the strains, and therefore the phenomena of mechanical fatigue, of the diffuser caused by temperature variations and to differences of temperature between the regions of diffuser provided with slots and the regions of diffuser without slots.
  • a problem arising in the above described burners is the phenomenon of flame instability, which is caused by secondary air which penetrates in the non-pierced region of the diffuser between adjacent rows of slots, said secondary air being capable of causing an excessive cooling of the flame fronts, which results in flame instability.
  • a burner comprising at least one body for mixing and distributing a mixture of gaseous fuel and air, said body being provided with a Venturi tube, arranged at the inside of the body, into which a mixture of gaseous fuel and air is introduced, and comprising a diffuser element provided with apertures through which said mixture flowing out of the Venturi tube is discharged, said apertures being shaped as slots parallel to each other and arranged in at least two uninterrupted rows parallel to each other, each row of slots being separated from an adjacent row by an intermediate region of said diffuser element, characterized in that it further comprises shielding means capable of limiting the inflow of secondary air in said intermediate region.
  • the burner according to the invention comprises a burner body 1, of a so-called modular blade type, comprising a Venturi tube 2 arranged inside said body and provided with an inlet 10 through which a mixture of gaseous fuel and air is introduced.
  • the Venturi tube 2 at its end opposite to the inlet 10, opens into a mixing and distributing chamber 4, closed at its upper end by a diffuser 3 provided with apertures 7, for instance shaped as slots, through which said mixture of gaseous fuel and primary air is discharged before being burned.
  • the diffuser 3 is made of refractory steel.
  • the diffuser 3 is provided with a peripheral rim 6, which is clinched onto a flange 5 provided at the upper end of the body 1 for fixing the diffuser 3 to the body 1.
  • the width of the peripheral rim 6 of the diffuser 3 is conveniently greater than the with of the flange 5, in order to make possible for said rim to be clinched onto said flange 5.
  • the slots 7 are all aligned in a direction substantially perpendicular to a longitudinal axis A of the diffuser 3 and are arranged in groups 11 aligned in two staggered parallel rows.
  • Each group 11 comprises two sub-groups of slots 7 separated by an intermediate region of diffuser without slots.
  • Shielding means is provided at each end of each group 11 of slots 7, said shielding means being capable of preventing, or limiting, the inflow of secondary air into said intermediate region 8.
  • Said shielding means comprises further apertures 9, for instance shaped as further slots parallel to the slots 7 and having a length greater than the width of said intermediate region 8.
  • the length of the further slots 9 may be substantially equal to the whole length of each group 11, as shown in figure 4.
  • the flow of mixture discharged from said further slots 9 makes a barrier against the penetration of secondary air in the intermediate region 8, which makes possible to prevent an excessive cooling of the flame fronts and to improve the stability of the flame fronts.
  • Figure 5 shows a further embodiment of the present invention, in which the groups 11 of slots are arranged in a single row on the diffuser 3.
  • Figure 6 shows a still further embodiment of the invention, in which the groups 11 of slots 7 are arranged in a single row substantially without solution of continuity between a group of slots and a subsequent group of slots.
  • Figure 7 shows another embodiment of the present invention, in which the slots 7 are arranged in two parallel uninterrupted rows, separated by said intermediate region 8.
  • One of said further slots 9 is arranged at each end of the twin rows of slots 7.
  • Figure 8 shows a further embodiment of the invention, in which twin rows of slots are arranged on the diffuser 3, said rows being separated by an intermediate region 8 in which additional slots 12 are provided for the outflow of said mixture, said additional slots 12 being aligned in a direction substantially perpendicular to the direction of the slots 7.
  • One of said further slots 9 is arranged at each end of said twin rows of slots 7.
  • the additional slots 12 allows a flame front to be generated in said intermediate region 8, which improves considerably the stability of the flame fronts generated by the mixture flowing out of the slots 7.
  • Figure 9 shows a still further embodiment of the invention, which differs from the embodiment shown in Figure 8 because said further slots 9 are arranged not only at the ends of said twin rows of slots 7, but also at regular intervals along said twin rows of slots.
  • Figure 10 shows a further embodiment of the invention, in which groups 13 of slots are arranged in two staggered rows on the diffuser 3.
  • Each group 13 comprises two subgroups of slots 7 aligned in a direction substantially perpendicular to the longitudinal axis A of the diffuser, said sub-groups being separated by an intermediate region in which said additional slots 12, aligned in a direction substantially perpendicular to said slots 7, are arranged.
  • one of said further slots 9 is arranged at each end of each group.
  • FIGS 11 and 12 show an embodiment of said shielding means, which comprises two baffles 14 arranged substantially perpendicular to the surface of the diffuser 3.
  • Said baffles 14 may be made of metal, ceramic material, or in any material resistant to high operative temperatures of the burner.
  • said baffles 14 may replace the further slots 9 in all the embodiments of the present invention, previously described.
  • each burner body 1 may generate a thermal power up to about 3-4 kW, whilst traditional so-called modular blade burners may generate a maximum thermal power no higher than 1,5-2kW per burner body.
  • the burner bodies 1 according to the invention require a combustion chamber having substantially the same dimensions as a combustion chamber for traditional burners. This makes possible to install a less number of burner bodies 1, for a given thermal power, without altering the outer dimensions of the combustion chamber, which leads to a saving of installation costs and to a reduction of the time required for installing the burner bodies in the combustion chamber.

Claims (21)

  1. Brûleur comprenant au moins un corps (1) pour le mélange et la distribution d'un mélange de combustible gazeux et d'air, ledit corps étant muni d'un tube Venturi (2), disposé à l'intérieur du corps, dans lequel est introduit un mélange de combustible gazeux et d'air, et comprenant un élément diffuseur (3) muni d'ouvertures (7) par lesquelles est déchargé un flux dudit mélange, lesdites ouvertures (7) étant conformées en fentes (7), caractérisé en ce que ledit élément diffuseur (3) est muni d'un moyen d'écran (14) apte à limiter l'entrée d'air secondaire dans ledit flux du mélange.
  2. Brûleur selon la revendication 1, dans lequel lesdites fentes (7) sont parallèles entre elles et sont disposées selon au moins deux rangées ininterrompues parallèles l'une à l'autre, chaque rangée de fentes (7) étant séparée d'une rangée adjacente par une zone intermédiaire (8) dudit élément diffuseur (3), ledit moyen d'écran (14) étant disposé de manière à limiter l'entrée d'air secondaire dans ladite zone intermédiaire (8).
  3. Brûleur selon la revendication 1, dans lequel lesdites fentes (7) sont parallèles entre elles et sont réparties en groupes (11, 13) de fentes (7), chacun comprenant deux sous-groupes de fentes séparés par une zone intermédiaire (8) dudit élément diffuseur (3), ledit moyen d'écran (14) étant disposé de manière à limiter l'entrée d'air secondaire dans ladite zone intermédiaire (8).
  4. Brûleur selon l'une quelconque des revendications 1 à 3, dans lequel ledit moyen d'écran comprend un moyen de déflecteur (14).
  5. Brûleur selon l'une quelconque des revendications 1 à 4, dans lequel ledit moyen d'écran est disposé essentiellement perpendiculaire à la surface dudit élément diffuseur (3).
  6. Brûleur selon la revendication 4 ou 5, dans lequel ledit moyen de déflecteur (14) est disposé dans une direction essentiellement perpendiculaire à un axe longitudinal (A) de l'élément diffuseur (3).
  7. Brûleur selon la revendication 6, dans lequel ledit moyen de déflecteur (14) a une longueur supérieure à la largeur de ladite zone intermédiaire (8).
  8. Brûleur selon l'une quelconque des revendications 3 à 7, dans lequel lesdits groupes (11, 13) de fentes (7) sont disposés sur au moins deux rangées parallèles décalées.
  9. Brûleur selon l'une quelconque des revendications 3 à 7, dans lequel lesdits groupes (11, 13) de fentes (7) sont disposés sur une unique rangée.
  10. Brûleur selon la revendication 9, dans lequel lesdits groupes (11, 13) de fentes (7) sont disposés sur ladite rangée unique essentiellement sans solution de continuité.
  11. Brûleur selon l'une des revendications 2, 4, 5, 6, 7, dans lequel ledit moyen d'écran (14) est prévu aux extrémités desdites rangées de fentes (7).
  12. Brûleur selon l'une quelconque des revendications 3 à 10, dans lequel ledit moyen d'écran (14) est prévu à chaque extrémité de chacun desdits groupes (11 ; 13), de fentes (7).
  13. Brûleur selon l'une quelconque des revendications 3 à 10, dans lequel ledit moyen d'écran (14) est interposé entre chaque groupe (11 ; 13) de fentes (7) et un groupe adjacent (11 ; 13) de fentes (7).
  14. Brûleur selon l'une quelconque des revendications précédentes, dans lequel lesdites fentes (7) sont alignées dans une direction essentiellement perpendiculaire à un axe longitudinal (A) de l'élément diffuseur (3).
  15. Brûleur selon l'une quelconque des revendications 2 à 14, dans lequel ladite zone intermédiaire (8) est munie d'ouvertures supplémentaires (12) dans lesquelles peut passer ledit mélange.
  16. Brûleur selon la revendication 15, dans lequel lesdites ouvertures supplémentaires (12) prennent la forme de fentes supplémentaires.
  17. Brûleur selon la revendication 15 ou 16, dans lequel lesdites ouvertures supplémentaires (12) sont disposées en rangées parallèles entre elles.
  18. Brûleur selon l'une quelconque des revendications 15 à 17, dans lequel lesdites ouvertures supplémentaires (12) sont alignées dans une direction essentiellement perpendiculaire auxdites fentes (7).
  19. Brûleur selon l'une quelconque des revendications 2 à 18 et comprenant de plus d'autres ouvertures (9) dans lesquelles peut passer ledit mélange, lesdites ouvertures supplémentaires (9) étant conformées en fentes supplémentaires alignées dans une direction essentiellement perpendiculaire à un axe longitudinal (A) de l'élément diffuseur (3) et ayant une longueur supérieure à la largeur de ladite zone intermédiaire (8).
  20. Brûleur selon l'une quelconque des revendications précédentes, dans lequel chaque corps (1) de brûleur est capable de générer une puissance thermique d'environ 3-4 kW.
  21. Brûleur selon l'une quelconque des revendications précédentes, dans lequel ledit corps (1) est muni à son extrémité supérieure d'une bride grâce à laquelle ledit élément diffuseur (3) est couplé audit corps (1), ledit élément diffuseur (3) étant muni d'un rebord périphérique (6) dimensionné de manière à pouvoir être serti sur ladite bride.
EP00103279A 1999-02-18 2000-02-17 Brûleur à prémélange gazeux Expired - Lifetime EP1030107B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999MO000026A IT1310175B1 (it) 1999-02-18 1999-02-18 Bruciatore perfezionato
ITMO990026 1999-02-18

Publications (2)

Publication Number Publication Date
EP1030107A1 EP1030107A1 (fr) 2000-08-23
EP1030107B1 true EP1030107B1 (fr) 2004-04-28

Family

ID=11386860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00103279A Expired - Lifetime EP1030107B1 (fr) 1999-02-18 2000-02-17 Brûleur à prémélange gazeux

Country Status (3)

Country Link
EP (1) EP1030107B1 (fr)
DE (1) DE60010151T2 (fr)
IT (1) IT1310175B1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2618137C1 (ru) * 2016-04-20 2017-05-02 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный архитектурно-строительный университет" (ФГБОУ ВПО "СПбГАСУ") Инжекционная горелка низкого давления
CN110513681A (zh) * 2018-05-22 2019-11-29 沃加斯布鲁恰托里有限责任公司 模块化燃烧器

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BRPI0906790A2 (pt) * 2008-01-18 2015-07-14 Garland Commercial Ind Llc Queimador de gás, e, conjunto de bandeja de queimador
IT1406865B1 (it) * 2011-01-12 2014-03-14 Worgas Bruciatori Srl Bruciatore ad elevata stabilita' perimetrale
ITMO20120281A1 (it) * 2012-11-19 2014-05-20 Worgas Bruciatori Srl Bruciatore atmosferico parzialmente premiscelato a combustibile gassoso.
IT201700062155A1 (it) * 2017-06-07 2018-12-07 Worgas Bruciatori Srl Bruciatore
GB2616620A (en) * 2022-03-14 2023-09-20 Bosch Thermotechnology Ltd Uk A burner assembly for combustion of an air-hydrogen mixture

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3177923A (en) * 1961-11-27 1965-04-13 C A Olsen Mfg Co Gas burner
WO1989001116A1 (fr) 1987-08-03 1989-02-09 Worgas Bruciatori S.R.L. PROCEDE DE COMBUSTION ET BRULEUR A GAZ A FAIBLE EMISSION DE NOx ET DE CO
GB8922086D0 (en) * 1989-09-30 1989-11-15 Bray Burners Ltd Improvements relating to gas burners
AU662485B2 (en) 1990-07-06 1995-09-07 Worgas Bruciatori S.R.L. Methods and apparatus for gas combustion
IT1270078B (it) 1994-07-08 1997-04-28 Worgas Bruciatori Srl Bruciatore di gas a diffusore perfezionato
DE29614706U1 (de) * 1995-08-17 1996-10-02 Vaillant Joh Gmbh & Co Brenner
DE19724806A1 (de) * 1996-06-11 1997-12-18 Vaillant Joh Gmbh & Co Vollvormischender atmosphärischer Strahlungsbrenner
IT1292721B1 (it) * 1997-04-28 1999-02-11 Worgas Bruciatori Srl Bruciatore per combustibili gassosi

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2618137C1 (ru) * 2016-04-20 2017-05-02 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный архитектурно-строительный университет" (ФГБОУ ВПО "СПбГАСУ") Инжекционная горелка низкого давления
CN110513681A (zh) * 2018-05-22 2019-11-29 沃加斯布鲁恰托里有限责任公司 模块化燃烧器

Also Published As

Publication number Publication date
EP1030107A1 (fr) 2000-08-23
ITMO990026A1 (it) 2000-08-18
IT1310175B1 (it) 2002-02-11
DE60010151T2 (de) 2005-01-27
ITMO990026A0 (it) 1999-02-18
DE60010151D1 (de) 2004-06-03

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