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EP3017099B1 - Gasvormischbrenner - Google Patents

Gasvormischbrenner Download PDF

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Publication number
EP3017099B1
EP3017099B1 EP14735914.5A EP14735914A EP3017099B1 EP 3017099 B1 EP3017099 B1 EP 3017099B1 EP 14735914 A EP14735914 A EP 14735914A EP 3017099 B1 EP3017099 B1 EP 3017099B1
Authority
EP
European Patent Office
Prior art keywords
burner
woven
knitted
braided
wire mesh
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
EP14735914.5A
Other languages
English (en)
French (fr)
Other versions
EP3017099A1 (de
Inventor
Frank IJKEN
Ernst MANDEMA
Geertjan KOOITJE
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.)
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Publication date
Application filed by Bekaert Combustion Technology BV filed Critical Bekaert Combustion Technology BV
Priority to EP14735914.5A priority Critical patent/EP3017099B1/de
Publication of EP3017099A1 publication Critical patent/EP3017099A1/de
Application granted granted Critical
Publication of EP3017099B1 publication Critical patent/EP3017099B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/60—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the warp or weft elements other than yarns or threads
    • D03D15/67—Metal wires
    • 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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
    • D03D13/008—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft characterised by weave density or surface weight
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D9/00—Open-work fabrics
    • 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
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/20—Metallic fibres
    • 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
    • F23D2203/1015—Flame diffusing means characterised by surface shape spherical
    • 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
    • F23D2203/102—Flame diffusing means using perforated plates
    • 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
    • F23D2900/00019—Outlet manufactured from knitted fibres

Definitions

  • the invention relates to gas premix burners that have a woven, knitted or braided burner deck comprising metal fibers.
  • gas premix burners can e.g. be used in boilers or in instantaneous water heaters.
  • EP0157432 discloses a burner that has a porous combustion membrane of non-woven structure and which is made by compressing a more or less randomly packed structure of steel fibers into a panel and subsequently sintering it to obtain strength, coherence and stability.
  • Further gas premix burners that have a sintered metal fiber web as burner membrane are e.g. known from WO93/18342 and WO94/14608 (in which the sintered metal fiber web is sintered to a screen).
  • US6410878B discloses a method for producing a flame support for a gas burner.
  • the method consists in feeding a metal alloy to an overflowing tank, to produce metal fibers from the metal alloy by cooling in contact with a mobile wheel; in arranging in a moulding matrix the resulting disjointed fibers and compressing them to form an agglomerated mat; in connecting the mat to electrodes and a capacitor, thereby bringing the fibers, at their points of contact, to a temperature higher than their melting point, to produce fibers closely welded together, under high voltage.
  • Gas premix burners are known that have a knitted or woven fabric comprising metal fibers as burner deck, positioned on a perforated plate or woven screen (a woven wire mesh) which is acting as gas distribution plate.
  • Such gas premix burners can be produced much cheaper than gas premix burners that have a sintered metal fiber web as burner deck. It is a benefit of such burners - compared to nonwoven burner decks that are sintered or welded - that the metal fiber based burner deck (e.g. a knitted or woven fabric) can freely expand when hot, while the perforated plate, the woven wire mesh or the expanded metal sheet is remaining sufficiently cool.
  • Such burners are e.g. known from US4657506 and WO2004/092647 .
  • JP2001235117 describes a burner with a flat perforated plate, onto which a knitted metal fiber fabric acting as burner deck is over its complete surface fully welded.
  • the primary object of the invention is to provide an improved gas premix burner.
  • a first aspect of the invention is a gas premix burner in accordance with claim 1.
  • the woven, knitted or braided burner deck is soft welded over at least part of its surface to the perforated plate, woven wire mesh or expanded metal sheet.
  • the soft welding is performed over at least 50% of surface of the burner deck, more preferably over at least 75% of its surface, and even more preferably substantially over its full surface; or over its full surface.
  • the soft welding is performed such that when pulling the woven, knitted or braided burner deck from the perforated plate, woven wire mesh or expanded metal sheet, the soft welded bonds between the woven, knitted or braided burner deck and the perforated plate, woven wire mesh or expanded metal sheet are broken rather than that breakage of the woven, knitted or braided burner deck occurs.
  • the test method to determine that the burner deck is soft welded, is pulling in peel-off mode: an edge portion of the burner deck is removed from the perforated plate, woven wire mesh or expanded metal sheet, and folded over 180°.
  • Pulling the burner deck is then done by hand or using pliers, wherein the pulling force is exerted parallel with the perforated plate, woven wire mesh or expanded metal sheet, in a direction of 180° to the burner deck.
  • the force builds up until the burner deck is progressively peeled off from the supporting perforated plate, woven wire mesh or expanded metal sheet leaving no metal fibers of the burner deck on the supporting perforated plate, woven wire mesh or expanded metal sheet (indicating that soft welding occurred); or until progressively destroying the burner deck at least partly wherein metal fibers of the burner deck remain attached to the supporting perforated plate, woven wire mesh or expanded metal sheet (indicating that no soft welding occurred).
  • the conclusion whether or not the burner deck is soft-welded to the supporting perforated plate, woven wire mesh or expanded metal sheet is independent of further parameters.
  • the woven, knitted or braided burner deck comprising metal fibers has a density of less than1500 g/dm 3 , preferably less than 1300 g/dm 3 , more preferably of less than 1200 g/dm 3 , even more preferably of less than 1100 g/dm 3 .
  • Soft welding differs from spot welding, as in spot welding, welding is performed in a predefined pattern of discrete spots over a surface. This is not the case in soft welding, as in soft welding over a surface itself welding is performed; the welding is not limited to a predefined pattern of discrete spots.
  • Soft welding creates benefits compared to the gas premix burners of the prior art.
  • Soft welding combines the positive effects that the woven, knitted or braided burner deck can expand when hot, while the perforated plate, the woven wire mesh or the expanded metal sheet is remaining sufficiently cool; with the benefit that less acoustic instabilities are observed when using the burner.
  • the free expansion when hot and retraction when cool allows to absorb thermal stresses, preventing damage (e.g. rupture) of the burner deck.
  • boilers where heat is generated by a burner can show thermo acoustical instabilities. The result is noise that can be very irritating.
  • air is fed by a fan and mixed with combustible gas, e.g. by means of a venturi, and introduced in a premixing chamber after which the premix of gas and air is combusted after flowing through a porous burner deck.
  • the hot flue gas transfers its thermal energy to a fluid in a heat exchanger after which the flue gas is evacuated through a chimney.
  • the combination of parts of the boiler results in it that noise is generated, e.g. by the gas flow through the fan.
  • the presence of the flame can amplify any noise that is present, from a level that the noise is not audible up to levels that are very annoying.
  • Noise is a standing wave.
  • the flame is not constant over time.
  • the short term fluctuations in the flame can coincide with the frequency of the noise resulting in amplification of the standing waves (and consequently of the noise).
  • This process is called thermo-acoustic instability.
  • the burner needs to be operated over a certain load range and also in a range of the air to gas ratio. This creates a large range of possible conditions of operation of the boiler, that each needs to be sufficiently silent in operation, meaning that acoustic instabilities should be sufficiently low over the full range of modulation of the burner.
  • the interactions between the different parameters are believed to be extremely complex and not understood.
  • the invention further allows using a woven, knitted or braided burner deck of lower specific weight than in the prior art, for a same performance of the burner.
  • the burner deck is one layer of a woven, knitted or braided fabric, placed on the perforated plate, woven wire mesh or expanded metal sheet.
  • the burner deck is knitted, woven or braided using yarns comprising or consisting out of a plurality of metal filaments or metal staple fibers or metal monofilaments.
  • the surface of the woven, knitted or braided burner deck at the other side than the perforated plate, woven wire mesh or expanded metal sheet is not covered by another metallic object, such that the surface of the woven, knitted or braided burner deck is, when the burner is in use, the surface on which combustion takes place.
  • the burner deck is curved over at least part of its surface.
  • the burner deck is over at least part of its surface double-curved. Where 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.
  • a sphere is an object that is double curved over its complete surface.
  • the gas premix burner of the invention has a cylindrical burner deck.
  • Examples of preferred metal fibers are stainless steel fibers.
  • a specifically preferred range of stainless steel fibers are chromium and aluminium comprising stainless steel fibers as in DIN 1.4767, e.g. as are known under the trademark FeCrAlloy.
  • equivalent diameter of a fiber is meant the diameter of a circle with the same surface area as the cross sectional area of that fiber.
  • Preferred metal fibers for use in the invention e.g. stainless steel fibers, with an equivalent diameter less than 50 micrometer or less than 40 micrometer, e.g. less than 25 micrometer, can be obtained by a bundle drawing technique.
  • This technique is disclosed e.g. in US-A-2050298 , US-A-3277564 and in US-A-3394213 .
  • Metal wires are forming the starting material and are covered with a coating such as iron or copper.
  • a bundle of the covered wires is subsequently enveloped in a metal pipe. Thereafter the thus enveloped pipe is reduced in diameter via subsequent wire drawing steps to come to a composite bundle with a smaller diameter.
  • the subsequent wire drawing steps may or may not be alternated with an appropriate heat treatment to allow further drawing.
  • the initial wires have been transformed into thin fibers which are embedded separately in the matrix of the covering material.
  • a bundle preferably comprises not more than 2000 fibers, e.g. between 500 and 1500 fibers.
  • the covering material can be removed e.g. by solution in an adequate leaching agent or solvent. The result is a bundle of metal fibers.
  • metal fibers for use in the invention can be manufactured in a cost effective way by machining a thin plate material.
  • a process is disclosed e.g. in US-A-4930199 .
  • a strip of a thin metal plate or sheet is the starting material. This strip is wound a number of times around a rotatably supported main shaft and is fixed thereto. The main shaft is rotated at constant speed in a direction opposite to that in which the plate material is wound.
  • a cutter having an edge line extending perpendicularly to the axis of the main shaft is fed at constant speed. The cutter has a specific face angle parallel to the axis of the main shaft. The end surface of the plate material is cut by means of the cutter.
  • Yet an alternative way of producing metal fibers for use in the invention is via extraction or extrusion from a melt of a metal or metal alloy.
  • Another alternative way of producing metal fibers for use in the invention is machining fibers from a block of solid metal.
  • Yarns, comprising or consisting out of metal fibers, for the production of the knitted fabric, the braided fabric or the woven fabric for use as burner deck in the invention can e.g. be spun from stretch broken fibers (such as bundle drawn stretch broken fibers) and/or can e.g. be yarns made from shaved or machined fibers.
  • the yarns can be plied yarns, e.g. two ply, three ply...
  • Preferred fabrics made from metal fibers have a weight of between 0.6 and 3 kg/m 2 ; preferably between 0.7 and 3 kg/m 2 , even more preferred between 1.2 and 2.5 kg/m 2 .
  • the knitted fabric, the braided fabric or the woven fabric has weight of between 0.6 and 1.3 kg/m 2 , more preferably of between 0.6 and 0.9 kg/m 2 .
  • the gas premix burner of the invention is suited for use in a boiler or water heater.
  • a second aspect of the invention is a method to produce a gas premix burner in accordance with claim 10.
  • Soft welding can preferably be performed by means of capacitor discharge welding.
  • a flat perforated plate, a woven wire mesh or an expanded metal sheet is laid on a flat electrode; and a woven, knitted or braided fiber based fabric (that is to become the burner deck of the burner) is placed on it.
  • a second electrode can be placed on the fabric.
  • the pressure applied between the two electrodes and the welding energy can be set - depending on e.g. the type of fabric used - in order to obtain the soft welding between the fabric (that will form the burner deck of the burner) and the perforated plate, woven wire mesh or expanded metal sheet.
  • the perforated plate, woven wire mesh or expanded metal sheet is flat at the moment the soft welding is performed.
  • the combination of the woven, knitted or braided burner deck soft welded to the perforated plate, woven wire mesh or expanded metal sheet is shaped into a curved (e.g. a cylindrical shape), double curved or cylindrical surface after the soft welding operation, e.g. by means of bending in one or more directions or by means of deep drawing.
  • a gas premix burner can be made in an easy way of curved (e.g. cylindrical) or of - even more complex - double curved shape that has the benefits of the gas premix burner as in the first aspect of the invention.
  • the woven, knitted or braided burner deck (most preferred is a knitted burner deck) is placed on a woven wire mesh. This combination allows even more complex double-curved shapes of burner decks to be made.
  • a third aspect of the invention is a boiler or water heater comprising a premix gas burner as in the first aspect of the invention.
  • a fourth aspect of the invention is the use of a premix gas premix burner as in the first aspect of the invention in blue flame mode, e.g. in a boiler or in a water heater, e.g. in an instantaneous water heater.
  • blue flame mode is meant that the gas premix burner is used in a way that blue flames are visible on the burner deck, creating flue gas and wherein the heat transfer towards the fluid to be heated is predominantly by conduction or convection by the flue gas. This is contrary to red flame burner operation, where red flames are visible and where the heat transfer is for a major part by means of emission of radiation by the burner deck with red flame combustion.
  • Figure 1 shows a gas premix burner according to the invention.
  • Figures 2 and 3 show cross sections of the burner of figure 1 along lines II-II and III-III respectively.
  • the gas premix burner 100 comprises a knitted metal fiber yarn burner deck 110 supported by a woven metal wire mesh 130.
  • the burner 100 further comprises a metal plate 135.
  • Figures 2 and 3 show the woven metal wire mesh 130 supporting the knitted metal fiber yarn burner deck 110 and the plate 135 welded along the edges of the knitted metal fiber yarn burner deck 110.
  • the burner deck 110 has a central zone 142 where it is single curved and two end sections 152 where it is double curved.
  • a knitted metal fiber fabric of 1400 g/m 2 is used as burner deck.
  • the fabric was cut to shape.
  • a flat woven metal wire mesh of appropriate dimensions was put on a flat electrode.
  • the knitted metal fiber fabric was put onto the flat woven metal wire mesh.
  • a second flat electrode was placed on the combination of fabric and woven metal wire mesh, and capacitor discharge welding was performed, using such parameters of pressure and welding energy that the density of the knitted fiber burner deck was 1070 g/dm 3 and that soft welding was performed.
  • the knitted burner deck soft welded to the woven metal wire mesh was deformed by means of deep-drawing into shape to form the gas premix burner as shown in figure 1 .
  • Plate 135 was subsequently added via welding.
  • the knitted burner deck could be pulled from the woven metal wire mesh, whereby the bonds between the knitted burner deck and the woven metal wire mesh were broken rather than that breakage of the knitted fiber based burner deck occurred. The test is performed in the way as shown in figure 5 .
  • the test method to determine that the woven, knitted or braided burner deck 510 comprising metal fibers is soft welded; is pulling in peel-off mode: an edge portion of the burner deck 510 is removed from the perforated plate, woven wire mesh or expanded metal sheet 530, and folded over 180°. Pulling the burner deck is then done by hand or using pliers, wherein the pulling force is exerted parallel with the perforated plate, woven wire mesh or expanded metal sheet, in a direction of 180° to the burner deck (in the direction indicated by the direction F in figure 5 ).
  • the force builds up until the burner deck is progressively peeled off from the supporting perforated plate, woven wire mesh or expanded metal sheet leaving no metal fibers of the burner deck on the supporting perforated plate, woven wire mesh or expanded metal sheet (indicating that soft welding occurred); or until progressively destroying the burner deck at least partly wherein metal fibers of the burner deck remain attached to the supporting perforated plate, woven wire mesh or expanded metal sheet (indicating that no soft welding occurred).
  • the conclusion whether or not the burner deck is soft-welded to the supporting perforated plate, woven wire mesh or expanded metal sheet is independent of further parameters.
  • Figure 4 shows test results - under the same test conditions - comparing a gas premix burner according to the invention with a prior art burner of the same dimensions and with the same knitted fabric as burner deck.
  • the knitted fabric burner deck was point welded at its circumference only to the supporting perforated plate.
  • the horizontal axis (X) shows the burner load, A is representing minimum burner load and B is full (maximal) burner load.
  • the vertical axis (Y) indicates the percentage of CO 2 measured in the flue gas generated by the burner, which is an indication for the amount of excess of air in the combustible premix air and gas fed to the burner deck.
  • the rectangle E indicates the normal range of operation of the burner in terms of burner load and percentage of CO 2 in the flue gas.
  • the lines G, for the prior art burner, and H, for the burner according to the invention, indicate the limits of operational conditions of burner load and percentage of CO 2 in the flue gas where thermo-acoustic instabilities started to occur: above the line (G or H according to the burner) no thermo-acoustic instabilities occurred, below the line, thermo-acoustic instabilities occurred.
  • thermo-acoustic instabilities can depend on a range of other aspects besides the burner load and the excess of air. Slight constructional differences, burner settings, temperature of the supplied combustion air, the quality of the gas (e.g. presence of impurities), in summary disturbing factors, - many of them not or not easily controllable - are known to have an effect on the thermo-acoustic instabilities.
  • Figure 4 illustrates - as the distance between the normal operational range of the burner of the invention is more distant from the line of occurrence of acoustical instabilities than for prior art burners - that the risk that disturbing factors will push the gas premix burner of the invention into thermo-acoustic instability is reduced to a large extent compared to prior art gas premix burners.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Woven Fabrics (AREA)

Claims (14)

  1. Gasvormischbrenner (100), umfassend
    - eine perforierte Platte, ein gewebtes Drahtgeflecht (130) oder ein Streckmetallblech;
    - ein gewebtes, gewirktes (110) oder geflochtenes Brennerdeck, das Metallfasern umfasst, das auf der perforierten Platte, dem gewebten Drahtgeflecht (130) oder dem Streckmetallblech platziert ist; dadurch gekennzeichnet, dass das gewebte, gewirkte (110) oder geflochtene Brennerdeck zumindest über einem Teil seiner Oberfläche auf die perforierte Platte, das gewebte Drahtgeflecht (130) oder das Streckmetallblech weichgelötet ist;
    wobei Weichlöten bedeutet, dass beim Abziehen des gewebten, gewirkten oder geflochtenen Brennerdecks von der perforierten Platte, vom gewebten Drahtgeflecht oder vom Streckmetallblech die Weichlötverbindungen zwischen dem gewebten, gewirkten oder geflochtenen Brennerdeck und der perforierten Platte, einem gewebten Drahtgeflecht oder Streckmetallblech brechen, statt dass das gewebte, gewirkte oder geflochtene Brennerdeck bricht.
  2. Gasvormischbrenner (100) nach einem der vorhergehenden Ansprüche, wobei das gewebt, gewirkte (110) oder geflochtene Brennerdeck, das Metallfasern umfasst, eine Dichte von weniger als 1500 g/dm3 aufweist.
  3. Gasvormischbrenner nach einem der vorhergehenden Ansprüche, wobei das Weichlöten im Wesentlichen über die komplette Oberfläche des Brennerdecks erfolgt.
  4. Gasvormischbrenner nach einem der vorhergehenden Ansprüche, wobei das Brennerdeck eine Schicht aus einem gewebten, gewirkten oder geflochtenen Textilmaterial ist, die über der perforierten Platte, dem gewebten Drahtgeflecht oder dem Streckmetallblech platziert ist.
  5. Gasvormischbrenner nach einem der vorhergehenden Ansprüche, wobei das Brennerdeck unter Verwendung von Garnen gewirkt, gewebt oder geflochten wird, die eine Vielzahl von Metallfäden oder Metallstapelfasern umfassen oder daraus bestehen.
  6. Gasvormischbrenner nach einem der vorhergehenden Ansprüche, wobei die Oberfläche des gewebten, gewirkten oder geflochtenen Brennerdecks auf der anderen Seite als an der perforierten Platte, dem gewebten Drahtgeflecht oder dem Streckmetallblech nicht von einem anderen metallischen Objekt bedeckt ist, so dass die Oberfläche des gewebten, gewirkten oder geflochtenen Brennerdecks - im Gebrauch des Brenners - die Oberfläche ist, auf der die Verbrennung erfolgt.
  7. Gasvormischbrenner nach einem der vorhergehenden Ansprüche, wobei das Brennerdeck zumindest über einem Teil seiner Oberfläche gebogen ist.
  8. Gasvormischbrenner nach einem der vorhergehenden Ansprüche, wobei das Brennerdeck zumindest über einem Teil seiner Oberfläche doppelt gebogen ist.
  9. Gasvormischbrenner nach einem der Ansprüche 1-7, wobei das Brennerdeckeine zylinderförmige Gestalt aufweist.
  10. Verfahren zum Herstellen eines Gasvormischbrenners, umfassend die folgenden Schritte
    - Bereitstellen eines gewebten, gewirkten oder geflochtenen Textilmaterials, das Metallfasern umfasst, welches das Brennerdeck des Gasvormischbrenners bilden soll;
    - Bereitstellen einer perforierten Platte, eines gewebten Drahtgeflechts oder eines Streckmetallblechs;
    - Weichlöten, z.B. durch Kondensatorentladungsschweißen, des gewebten, gewirkten oder geflochtenen Textilmaterials auf die perforierte Platte, das gewebte Drahtgeflecht oder das Streckmetallblech;
    wobei Weichlöten bedeutet, dass beim Abziehen des gewebten, gewirkten oder geflochtenen Brennerdecks von der perforierten Platte, vom gewebten Drahtgeflecht oder vom Streckmetallblech die Weichlötverbindungen zwischen dem gewebten, gewirkten oder geflochtenen Brennerdeck und der perforierten Platte, einem gewebten Drahtgeflecht oder Streckmetallblech brechen, statt dass das gewebte, gewirkte oder geflochtene Brennerdeck bricht.
  11. Verfahren nach Anspruch 10, wobei die perforierte Platte, das gewebte Drahtgeflecht oder das Streckmetallblech zum Zeitpunkt der Durchführung des Weichlötens flach ist.
  12. Verfahren nach den Ansprüchen 10-11, wobei die Kombination aus dem gewebten, gewirkten oder geflochtenen Brennerdeck, das auf die perforierte Platte, das gewebte Drahtgeflecht oder das Streckmetallblech weichgelötet ist, nach dem Weichlötvorgang in eine gebogene, doppelt gebogene oder zylindrische Gestalt geformt wird.
  13. Boiler oder Warmwasserbereiter, umfassend einen Gasvormischbrenner nach den Ansprüchen 1 bis 9.
  14. Verwendung eines Gasvormischbrenners nach den Ansprüchen 1-9 im blauen Flammenmodus, z.B. in einem Boiler oder in einem Warmwasserbereiter.
EP14735914.5A 2013-07-02 2014-07-01 Gasvormischbrenner Active EP3017099B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14735914.5A EP3017099B1 (de) 2013-07-02 2014-07-01 Gasvormischbrenner

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13174660 2013-07-02
EP14735914.5A EP3017099B1 (de) 2013-07-02 2014-07-01 Gasvormischbrenner
PCT/EP2014/063903 WO2015000870A1 (en) 2013-07-02 2014-07-01 Premix gas burner

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ITUA20164076A1 (it) * 2016-06-03 2017-12-03 Worgas Bruciatori Srl Bruciatore
JP2019526777A (ja) * 2016-09-13 2019-09-19 ベーカート・コンバスチョン・テクノロジー・ベスローテン・フェンノートシャップ 予混合ガスバーナ
WO2019011737A1 (en) * 2017-07-13 2019-01-17 Bekaert Combustion Technology B.V. GAS PREMIX BURNER
CN111911924B (zh) * 2020-07-29 2021-12-24 西安菲尔特金属过滤材料股份有限公司 一种平板式铁铬铝纤维燃烧头的制备方法

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TR201910916T4 (tr) 2019-08-21
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