EP3652484A1 - Brûleur à gaz à prémélange - Google Patents

Brûleur à gaz à prémélange

Info

Publication number
EP3652484A1
EP3652484A1 EP18735583.9A EP18735583A EP3652484A1 EP 3652484 A1 EP3652484 A1 EP 3652484A1 EP 18735583 A EP18735583 A EP 18735583A EP 3652484 A1 EP3652484 A1 EP 3652484A1
Authority
EP
European Patent Office
Prior art keywords
burner
premix gas
wire mesh
deck
woven wire
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.)
Withdrawn
Application number
EP18735583.9A
Other languages
German (de)
English (en)
Inventor
René VAN ZUTPHENT
Geert Folkers
Daniel HOLTROP
Roelof BOER
Derk OOSTRA
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.)
Bekaert Combustion Technology BV
Original Assignee
Bekaert Combustion Technology BV
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 Bekaert Combustion Technology BV filed Critical Bekaert Combustion Technology BV
Publication of EP3652484A1 publication Critical patent/EP3652484A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • 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
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate
    • 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
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/149—Radiant burners using screens or perforated plates with wires, threads or gauzes as radiation intensifying means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/101—Flame diffusing means characterised by surface shape
    • F23D2203/1017—Flame diffusing means characterised by surface shape curved
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/103—Flame diffusing means using screens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2211/00—Thermal dilatation prevention or compensation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/20—Burner material specifications metallic
    • F23D2212/201—Fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2213/00—Burner manufacture specifications
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/14—Special features of gas burners
    • F23D2900/14001—Sealing or support of burner plate borders

Definitions

  • the invention relates to the field of premix gas burners, more particularly to surface
  • stabilized premix gas burners comprising a woven wire mesh as burner deck.
  • US5474443A discloses a premix gas burner with a hemispherical burner deck out of a woven wire mesh.
  • the first aspect of the invention is a premix gas burner comprising a metal plate structure for mounting the premix gas burner in a heating appliance (e.g. in a condensing boiler), a burner deck and a shaped distributor plate.
  • the burner deck comprises - and preferably consists out of - a woven wire mesh on the outer surface of which premix gas is combusted after the premix gas has flown through the woven wire mesh.
  • the shaped distributor plate comprises perforations. When the burner is in use the premix gas flows through the perforations of the shaped distributor plate before the premix gas flows through the woven wire mesh.
  • One or more than one slot or notch shaped opening is provided in the shaped distributor plate.
  • the woven wire mesh comprises a
  • the circumferential edge of the woven wire mesh comprises at least one tab.
  • the circumferential edge of the woven wire mesh comprises a plurality of tabs. The tab or tabs is/are each inserted through a slot or notch shaped opening in the shaped distributor plate.
  • the woven wire mesh burner deck of surface stabilized premix gas burners gets hot when the burner is in use.
  • the woven wire mesh burner deck needs to be able to cope with the stresses induced by the thermal expansion associated with the high temperature when the burner is in use and by the shrinkage when the burner is not in use. If this is not the case, early mechanical failure of the burner deck will occur. Thanks to the provision of the tab or tabs at the circumference of the woven wire mesh burner - tab or tabs which are inserted through slot or notch shaped openings in the shaped distributor plate - a certain amount of movement of the woven wire mesh relative to the shaped distributor plate is possible when the woven wire mesh expands when warming up or shrinks when cooling down.
  • the premix gas burner of the invention is very well suited to withstand thermal expansion and shrinkage, resulting in a long lifetime of the premix gas burner.
  • Preferred tabs have a largest width between 4 and 20 mm; more preferably between 6 and 12 mm.
  • Preferred tabs have a largest height between 3 and 6 mm.
  • the woven wire mesh has a thickness between 0.6 and 1.3 mm.
  • a woven wire mesh of 0.9 mm thickness can be advantageously used in the invention.
  • the shaped distributor plate and the metal plate structure are welded to each other.
  • the shaped distributor plate and the metal plate structure are fixed to each other by mechanical connecting means; e.g. by bolts, rivets or by a slot and tongue connection.
  • At least one tab is bent such that an included angle less than 180° is provided between the tab inserted through the slot or notch and the section of the woven wire mesh at the other side of the opening.
  • all tabs are bent such that an included angle less than 180° is provided between the tab through the slot or notch and the section of the woven wire mesh at the other side of the slot or notch.
  • the included angle is less than 150°, even more preferably less than 120°.
  • the included angle is more than 30°, even more preferably more than 60°, even more preferably more than 90°.
  • Embodiments wherein at least one tab is bent ensure that the woven wire mesh is better held in place in applications where the burner is used with the burner deck facing downwards; and contribute to the realization of a longer lifetime of the burner deck and the burner.
  • the burner deck is provided in a convex shape. It is meant that when the burner is in operation, the flames of the burner are anchored onto the convex side of the burner deck. More preferably, the full surface of the burner deck is provided in a convex shape; meant is that when the burner is in operation, the full surface of the burner deck at the side of which the flames are anchored has a convex shape.
  • the burner deck has a double curved surface.
  • a surface is at a point on it double curved, there is at that point no direction in which the radius of curvature at that point is infinite.
  • a cylindrical burner is a burner that has a single curved surface.
  • the circumference of the burner deck has the shape of a rectangle of which the two short sides are rounded. More preferably, the short sides of the rectangle are continuously rounded.
  • tabs are only provided along the two long sides of the rectangular shape of the circumference of the burner deck. Meant is that no tabs are provided along the - possibly continuously - rounded short sides. Burners according to this embodiment are even better suited for long lifetime use, as the absence of tabs along the short sides allows better thermal expansion of the woven wire mesh in its length direction.
  • the metal plate structure comprises an upstanding ridge at the two short sides of the rectangular burner deck.
  • the distance between the upstanding ridge at the two short sides and the burner deck is at least 0.5 mm when the burner is cold. Preferably, this distance is at least 1 mm, more preferably at least 1.2 mm, and as an example 1.35 mm when the burner is cold.
  • the presence of the upstanding ridge synergistically adds to achieve a burner with a longer lifetime.
  • the upstanding ridge has proven to present a barrier preventing flame flashback into the burner.
  • the metal plate structure has a central opening.
  • the burner deck and the shaped distributor plate are provided inserted through and extending through the central opening.
  • the metal plate structure comprises an upstanding ridge around the central opening. The ridge extends in the direction in which the burner deck extends through the central opening of the metal plate structure. The presence of the upstanding ridge synergistically adds to achieve a burner with a longer lifetime. The upstanding ridge has proven to present a barrier preventing flame flashback into the burner.
  • the distance between the upstanding ridge at the two long sides and the burner deck is less than 0.5 mm.
  • the distance between the upstanding ridge at the two long sides and the burner deck is less than 0.5 mm.
  • the woven wire mesh does not comprise ribs nor
  • the woven wire mesh comprises ribs and/or embossments.
  • the second aspect of the invention is a condensing boiler comprising a premix gas burner as in any embodiment of the first aspect of the invention.
  • Figures 1-4 show a premix gas burner according to the invention. Mode(s) for Carrying Out the Invention
  • Figure 1 shows a view 100 onto the burner deck of a premix gas burner according to the invention.
  • Figure 2 shows a bottom view 200 of the premix gas burner of figure 1 .
  • Figure 3 shows the view 300 onto a cross section along Ill-Ill of the premix gas burner of figure 1.
  • Figure 4 shows the view 400 onto a cross section along IV-IV of the premix gas burner of figure 1.
  • the premix gas burner comprises a metal plate structure 102 for mounting the premix gas burner in a heating appliance (e.g. in a condensing boiler), a burner deck 104 and a shaped distributor plate 106.
  • the shaped distributor plate 106 is shown in figures 2-4; the perforations 108 of the shaped distributor plate are visible in figure 1 through the burner deck 104.
  • the burner deck and the shaped distributor plate are provided inserted through and extending through the central opening in the metal plate structure.
  • the full surface of the burner deck is provided in a convex shape.
  • the burner 104 deck consists out of a woven wire mesh on the outer surface of which premix gas is combusted after the premix gas has flown through the woven wire mesh.
  • the woven wire mesh is 0.9 mm thick.
  • the shaped distributor plate comprises perforations 108. When the burner is in use the premix gas flows through the perforations of the shaped distributor plate before the premix gas flows through the woven wire mesh.
  • the circumference of the burner deck has the shape of a rectangle of which the two short sides are continuously rounded.
  • a plurality of slots 1 10 is provided in the shaped distributor plate.
  • the circumferential edge of the woven wire mesh comprises a plurality of tabs 1 12.
  • the tabs 1 12 are inserted through slots 1 10.
  • Tabs 1 12 are only provided along the two long sides of the rectangular shape of the circumference of the burner deck; no tabs are provided along the continuously rounded short sides.
  • the shaped distributor plate 106 and the metal plate structure 102 are fixed to each other by rivets 1 14 through holes 1 16 in the metal plate structure and the shaped distributor plate.
  • the metal plate structure 102 comprises an upstanding ridge 1 18 along the full
  • the distance A between the upstanding ridge at the two short sides and the burner deck is 1.35 mm when the burner is cold.
  • the distance B between the upstanding ridge along the two long sides and the burner deck is less than 0.35 mm.

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)

Abstract

L'invention concerne un brûleur à gaz à prémélange, comprenant une structure de plaque métallique, un plateau de brûleur et une plaque de distribution mise en forme. La structure de plaque métallique est ménagée de façon à monter le brûleur à gaz à prémélange dans un appareil de chauffage. Le plateau de brûleur comprend un treillis de fil tissé sur la surface externe duquel un gaz à prémélange est brûlé après que le gaz à prémélange s'est écoulé à travers le treillis de fil tissé. La plaque de distribution mise en forme comprend des perforations. Lorsque le brûleur est en cours d'utilisation, le gaz à prémélange s'écoule à travers les perforations de la plaque de distribution mise en forme avant que le gaz à prémélange ne s'écoule à travers le treillis de fil tissé. Une ou plusieurs ouvertures en forme de fente ou d'encoche sont ménagées dans la plaque de distribution mise en forme. Le treillis de fil tissé comprend un bord circonférentiel comprenant au moins une languette. Ladite languette est insérée à travers une ouverture en forme de fente ou d'encoche dans la plaque de distribution mise en forme.
EP18735583.9A 2017-07-13 2018-07-04 Brûleur à gaz à prémélange Withdrawn EP3652484A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17181111 2017-07-13
PCT/EP2018/068039 WO2019011741A1 (fr) 2017-07-13 2018-07-04 Brûleur à gaz à prémélange

Publications (1)

Publication Number Publication Date
EP3652484A1 true EP3652484A1 (fr) 2020-05-20

Family

ID=59337535

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18735583.9A Withdrawn EP3652484A1 (fr) 2017-07-13 2018-07-04 Brûleur à gaz à prémélange

Country Status (4)

Country Link
US (1) US20200200437A1 (fr)
EP (1) EP3652484A1 (fr)
CN (1) CN110832253A (fr)
WO (1) WO2019011741A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4163544A1 (fr) 2021-10-07 2023-04-12 BDR Thermea Group B.V. Pont de brûleur et procédé de production d'un tel pont de brûleur
DE102023104232A1 (de) * 2023-02-21 2024-08-22 Vaillant Gmbh Brenneranordnung, Gasheizgerät und deren Verwendungen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3412967A1 (fr) * 2017-06-07 2018-12-12 Worgas Bruciatori S.R.L. Brûleur

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59302359D1 (de) 1992-06-13 1996-05-30 Viessmann Werke Kg Strahlungsbrenner für heizkessel
DE19749150A1 (de) * 1997-11-06 1999-05-27 Bosch Gmbh Robert Gebläsebrenner
KR20110104080A (ko) * 2003-04-18 2011-09-21 엔브이 베카에르트 에스에이 금속 버너 멤브레인
US7004751B2 (en) * 2003-12-23 2006-02-28 Jotul North America, Inc. Gas burner assemblies, methods for assembling, and gas fired appliances employing same
WO2005078344A1 (fr) 2004-02-05 2005-08-25 Beckett Gas, Inc. Bruleur
EP1840460A1 (fr) * 2006-03-29 2007-10-03 Aeromatix Limited Brûleur à gaz
IT1406865B1 (it) * 2011-01-12 2014-03-14 Worgas Bruciatori Srl Bruciatore ad elevata stabilita' perimetrale
GB2511029A (en) * 2012-12-19 2014-08-27 Worgas Burners Ltd Gas burner
EP3017098B1 (fr) * 2013-07-02 2019-06-05 Bekaert Combustion Technology B.V. Brûleur de gaz pré-mélangé
EP3513122B1 (fr) * 2016-09-13 2020-12-16 Bekaert Combustion Technology B.V. Brûleur de gaz pré-mélangé

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3412967A1 (fr) * 2017-06-07 2018-12-12 Worgas Bruciatori S.R.L. Brûleur

Also Published As

Publication number Publication date
US20200200437A1 (en) 2020-06-25
CN110832253A (zh) 2020-02-21
WO2019011741A1 (fr) 2019-01-17

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