EP3572728B1 - Premix gas burner - Google Patents

Premix gas burner Download PDF

Info

Publication number
EP3572728B1
EP3572728B1 EP18173554.9A EP18173554A EP3572728B1 EP 3572728 B1 EP3572728 B1 EP 3572728B1 EP 18173554 A EP18173554 A EP 18173554A EP 3572728 B1 EP3572728 B1 EP 3572728B1
Authority
EP
European Patent Office
Prior art keywords
burner
fiber based
metal plate
deck
perforated section
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
EP18173554.9A
Other languages
German (de)
French (fr)
Other versions
EP3572728A1 (en
Inventor
Ernst MANDEMA
Geertjan KOOITJE
Daniel HOLTROP
Bert ELZINGA
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
Priority to EP18173554.9A priority Critical patent/EP3572728B1/en
Publication of EP3572728A1 publication Critical patent/EP3572728A1/en
Application granted granted Critical
Publication of EP3572728B1 publication Critical patent/EP3572728B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • 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

Definitions

  • the invention relates to the technical field of premix gas burners comprising a perforated plate and a fiber based burner deck placed on the perforated plate.
  • WO13/164159A1 discloses a gas premix burner comprising a perforated plate and a fiber based burner deck placed onto the perforated plate. Premix gas is combusted on the surface of the fiber based burner deck after the premix gas has flown through the perforated plate and the fiber based burner deck.
  • the first aspect of the invention is a premix gas burner as in claim 1.
  • a premix gas burner according to the invention comprises a metal plate and a fiber based burner deck.
  • the metal plate is made out of one single piece of metal.
  • the metal plate comprises - and preferably consists out of - a perforated section and a flange.
  • the flange is provided along the full circumference of the metal plate.
  • the perforated section comprises a plurality of perforations.
  • the fiber based burner deck covers the perforations of the perforated section of the metal plate; such that when premix gas is supplied to the premix gas burner, the premix gas flows through the perforations of the perforated section of the metal plate and through the fiber based burner deck to be combusted at the other side of the fiber based burner deck.
  • the perforated section comprises - and preferably consists out of - a central segment and four side segments.
  • the central segment comprises the centre of the perforated section.
  • An edge of each of the four side segments contacts the edge of the central segment.
  • the side segments are connected to each other via ribs, preferably via straight line ribs. With straight line ribs is meant that the rib is a straight line.
  • Each of the four side segments is connected to the central segment via a curved rib. With ribs and curved ribs is meant the transition in the metal plate between segments.
  • the burner of the invention provides a number of surprising benefits. Although not understood, it is believed that the presence of the curved ribs at least contributes to the surprising benefits as the curved ribs allow draping the fiber based burner deck better and more uniformly over the metal plate.
  • the burner deck has shown less sagging when the burner is in use. Sagging can occur when the burner is in use and the burner deck gets hot. Gas premix burners burn downwards, as they are mostly used in condensing boilers. Sagging relates to the burner deck not or no longer closely adhering to the perforated plate.
  • the burner has also shown to be less prone to noise when in operation. The combined result is that the burner or the invention provides more stable operation.
  • the perforated section is convex over its full surface and double curved over at least part of its surface. 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 full surface.
  • the fiber based burner deck covers the perforations of the perforated section at the convex side of the perforated section.
  • the central segment and each of the four side segments have a smooth surface.
  • a smooth surface is meant that no line on the surface has a discontinuous first derivative.
  • the central segment is flat. It is meant that the central segment is fully provided in one single plane. With a “plane” is meant a flat surface on which a straight line joining any two points on it would wholly lie. More preferably, the plane in which the central segment is fully provided is parallel with the flange.
  • all four curved ribs are provided in one plane.
  • each of the curved ribs are provided in the plane of the central segment.
  • each of the four side segments contacts the flange.
  • the fiber based burner deck is provided by one single woven, braided or knitted textile fabric.
  • a weft knitted textile fabric thanks to its extensibility that allows better draping of the burner deck onto the metal plate.
  • the fiber based burner deck preferably comprises metal fibers.
  • metal fibers are stainless steel fibers.
  • a specifically preferred range of stainless steel fibers are chromium and aluminum comprising stainless steel fibers as in DIN 1.4767, e.g. as are known under the trademark FeCrAlloy.
  • Metal fibers for the burner deck e.g. stainless steel fibers with a diameter less than 40 micrometers, e.g. less than 25 micrometers, 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 these 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 no more than 2000 fibers, e.g. between 500 and 1500 fibers.
  • the covering material can be removed e.g. by solution in an adequate pickling agent or solvent. The final result is the naked fiber bundle.
  • metal fibers for the burner deck such as stainless steel fibers can be manufactured in a cost effective way by machining a thin plate material.
  • a strip of a thin metal plate is the starting material. This strip is wound around the cylindrical outer surface of a rotatably supported main shaft a number of times 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 expending 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.
  • Another alternative way of producing metal fibers is machining fibers from a solid block of metal.
  • ceramic fibers can be used in the fiber based burner deck.
  • the fiber based burner deck can e.g. comprise or be a woven fabric or a knitted fabric (and more preferably a weft knitted fabric) or a braided fabric comprising yarns with e.g. metal fibers, preferably stainless steel fibers.
  • the yarns can be spun from stretchbroken fibers (such as bundle drawn stretch broken fibers) or 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 fiber based burner deck is at its edges attached to the metal plate, e.g. by means of welded bonds.
  • the fiber based burner deck is at a plurality of discrete positions or lines over its surface attached to the perforated section of the metal plate, e.g. by means of welds; e.g. line welds or spot welds.
  • welds - e.g. spot welds or line welds - provide diamond patterns on the fiber based burner deck.
  • the fiber based burner deck is welded over its full surface to the perforated section of the metal plate. More preferably, such welding is performed by means of capacitor discharge welding, such that the fiber based burner deck is welded over its full surface to the perforated section of the metal plate. In embodiments wherein the fiber based burner deck is welded over its full surface to the perforated section of the metal plate, preferably the welding is done such that the fiber based burner deck can be pulled from the perforated section of the metal plate such that the fiber based burner deck is pulled from the metal plate by breaking the welded bonds between fiber based burner deck and metal plate; it is meant that no fiber bundles stick to the metal plate.
  • the burner is made according to the following method.
  • a flat plate is provided with a perforated section.
  • the fiber based burner deck is attached to this flat metal plate; and the plate with the fiber based burner deck is mechanically deformed - e.g. via deep drawing - such that the metal plate obtains the shape as in the invention, including with the flange along the full circumference of the metal plate; and with the fiber based burner deck attached to it.
  • the perforated section comprises a combination of slots and circular perforations. More preferably, the slots are rectangular slots and the long sides of all rectangular slots are parallel to each other.
  • the fiber based burner deck is a weft knitted fabric and the perforated section comprises a combination of rectangular slots and circular perforations, wherein the long sides of all rectangular slots are parallel to each other.
  • the weft direction of the weft knitted fabric is perpendicular to the long sides of the rectangular slots.
  • the flange has a rectangular circumference, possibly with rounded corners.
  • the inner circumference of the flange is rectangular.
  • the flange is provided for mounting the burner in a heating appliance.
  • the fiber based burner deck is provided by a rectangular piece of cloth.
  • the second aspect of the invention is a heat cell comprising a heat exchanger and a burner as in the first aspect of the invention.
  • the burner is installed in the heat exchanger.
  • the burner is provided for the production of flue gas.
  • the heat exchanger comprises channels for flow of the flue gas.
  • the heat exchanger comprises flow channels for the flow of a fluid to be heated by heat exchange from the flue gas.
  • Figures 1 and 2 show views of an example of a premix gas burner 10 according to the invention.
  • Figure 3 shows a view of the burner of figure 2 along line III-III.
  • Figure 4 shows a view of the burner of figure 2 along line IV-IV.
  • the premix gas burner comprises a metal plate 12 and a fiber based burner deck 40.
  • the metal plate comprises a perforated section 14 and a flange 16.
  • the flange is provided along the full circumference of the metal plate and has a rectangular circumference.
  • the flange is provided for mounting the burner in a heating appliance.
  • the perforated section 14 comprises a plurality of perforations.
  • Figure 5 shows a detail of the perforation pattern of the perforated section of the metal plate. More specifically, the perforation pattern of the burner of the invention comprise a combination of rectangular slots 18 the long sides of which are all parallel to each other; and circular perforations 20.
  • the fiber based burner deck 40 covers the perforations of the perforated section of the metal plate; such that when premix gas is supplied to the premix gas burner, the premix gas flows through the perforations of the perforated section of the metal plate and through the fiber based burner deck to be combusted at the other side of the fiber based burner deck.
  • the fiber based burner deck is provided by a rectangular piece of weftknitted fabric comprising yarns made out of stainless steel fibers. In the exemplary burner, the weft direction of the weft knitted fabric is perpendicular to the long sides of the rectangular slots.
  • the fiber based burner deck is at its edges attached to the metal plate by means of welded bonds.
  • the fiber based burner deck of the exemplary burner is at a plurality of positions over its surface attached to the perforated section of the metal plate by means of welding lines 42 (not shown in figure 1 , shown in figure 2 ); the welding line provide diamond patterns on the fiber based burner deck.
  • the perforated section contains a central segment 22 and four side segments 24.
  • the central segment comprises the center of the perforated section.
  • the central segment and each of the four side segments have a smooth surface; with a smooth surface is meant that no line on the surface has a discontinuous first derivative.
  • the central segment is flat.
  • each of the four side segments contacts the edge of the central segment.
  • the side segments are connected to each other via straight line ribs 26.
  • Each of the four side segments is connected to the central segment via a curved rib 28. In the example, all four curved ribs are provided in one plane.

Description

    Technical Field
  • The invention relates to the technical field of premix gas burners comprising a perforated plate and a fiber based burner deck placed on the perforated plate.
    • Background Art
  • WO13/164159A1 discloses a gas premix burner comprising a perforated plate and a fiber based burner deck placed onto the perforated plate. Premix gas is combusted on the surface of the fiber based burner deck after the premix gas has flown through the perforated plate and the fiber based burner deck.
    • Disclosure of Invention
  • It is a first object of the invention to provide an improved premix gas burner.
  • The first aspect of the invention is a premix gas burner as in claim 1.
  • A premix gas burner according to the invention comprises a metal plate and a fiber based burner deck. The metal plate is made out of one single piece of metal. The metal plate comprises - and preferably consists out of - a perforated section and a flange. The flange is provided along the full circumference of the metal plate. The perforated section comprises a plurality of perforations. The fiber based burner deck covers the perforations of the perforated section of the metal plate; such that when premix gas is supplied to the premix gas burner, the premix gas flows through the perforations of the perforated section of the metal plate and through the fiber based burner deck to be combusted at the other side of the fiber based burner deck. The perforated section comprises - and preferably consists out of - a central segment and four side segments. The central segment comprises the centre of the perforated section. An edge of each of the four side segments contacts the edge of the central segment. The side segments are connected to each other via ribs, preferably via straight line ribs. With straight line ribs is meant that the rib is a straight line. Each of the four side segments is connected to the central segment via a curved rib. With ribs and curved ribs is meant the transition in the metal plate between segments.
  • The burner of the invention provides a number of surprising benefits. Although not understood, it is believed that the presence of the curved ribs at least contributes to the surprising benefits as the curved ribs allow draping the fiber based burner deck better and more uniformly over the metal plate. The burner deck has shown less sagging when the burner is in use. Sagging can occur when the burner is in use and the burner deck gets hot. Gas premix burners burn downwards, as they are mostly used in condensing boilers. Sagging relates to the burner deck not or no longer closely adhering to the perforated plate. The burner has also shown to be less prone to noise when in operation. The combined result is that the burner or the invention provides more stable operation.
  • Preferably, the perforated section is convex over its full surface and double curved over at least part of its surface. 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. As an example, a cylindrical burner is a burner that has a single curved surface. A sphere is an object that is double curved over its full surface. Preferably, the fiber based burner deck covers the perforations of the perforated section at the convex side of the perforated section.
  • Preferably, the central segment and each of the four side segments have a smooth surface. With a smooth surface is meant that no line on the surface has a discontinuous first derivative.
  • Preferably, the central segment is flat. It is meant that the central segment is fully provided in one single plane. With a "plane" is meant a flat surface on which a straight line joining any two points on it would wholly lie. More preferably, the plane in which the central segment is fully provided is parallel with the flange.
  • Preferably, all four curved ribs are provided in one plane. In embodiments wherein the central segment is flat, each of the curved ribs are provided in the plane of the central segment.
  • Preferably, an edge of each of the four side segments contacts the flange.
  • Preferably, the fiber based burner deck is provided by one single woven, braided or knitted textile fabric. Particularly preferred is a weft knitted textile fabric thanks to its extensibility that allows better draping of the burner deck onto the metal plate.
  • The fiber based burner deck preferably comprises metal fibers. Examples of preferred ranges of metal fibers are stainless steel fibers. A specifically preferred range of stainless steel fibers are chromium and aluminum comprising stainless steel fibers as in DIN 1.4767, e.g. as are known under the trademark FeCrAlloy.
  • Metal fibers for the burner deck, e.g. stainless steel fibers with a diameter less than 40 micrometers, e.g. less than 25 micrometers, 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 these 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. Inside the composite bundle the initial wires have been transformed into thin fibers which are embedded separately in the matrix of the covering material. Such a bundle preferably comprises no more than 2000 fibers, e.g. between 500 and 1500 fibers. Once the desired final diameter has been obtained the covering material can be removed e.g. by solution in an adequate pickling agent or solvent. The final result is the naked fiber bundle.
  • Alternatively metal fibers for the burner deck, such as stainless steel fibers can be manufactured in a cost effective way by machining a thin plate material. Such a process is disclosed e.g. in US-A-4930199 . A strip of a thin metal plate is the starting material. This strip is wound around the cylindrical outer surface of a rotatably supported main shaft a number of times 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 expending 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 the burner deck is via extracting or extrusion from a melt.
  • Another alternative way of producing metal fibers is machining fibers from a solid block of metal.
  • As an alternative for or in combination with metal fibers, ceramic fibers can be used in the fiber based burner deck.
  • The fiber based burner deck can e.g. comprise or be a woven fabric or a knitted fabric (and more preferably a weft knitted fabric) or a braided fabric comprising yarns with e.g. metal fibers, preferably stainless steel fibers. The yarns can be spun from stretchbroken fibers (such as bundle drawn stretch broken fibers) or 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/m2; preferably between 0.7 and 3 kg/m2, even more preferred between 1.2 and 2.5 kg/m2.
  • Preferably, the fiber based burner deck is at its edges attached to the metal plate, e.g. by means of welded bonds.
  • Preferably, the fiber based burner deck is at a plurality of discrete positions or lines over its surface attached to the perforated section of the metal plate, e.g. by means of welds; e.g. line welds or spot welds. In a more preferred embodiment, the welds - e.g. spot welds or line welds - provide diamond patterns on the fiber based burner deck.
  • Preferably, the fiber based burner deck is welded over its full surface to the perforated section of the metal plate. More preferably, such welding is performed by means of capacitor discharge welding, such that the fiber based burner deck is welded over its full surface to the perforated section of the metal plate. In embodiments wherein the fiber based burner deck is welded over its full surface to the perforated section of the metal plate, preferably the welding is done such that the fiber based burner deck can be pulled from the perforated section of the metal plate such that the fiber based burner deck is pulled from the metal plate by breaking the welded bonds between fiber based burner deck and metal plate; it is meant that no fiber bundles stick to the metal plate.
  • In a preferred embodiment of the invention, the burner is made according to the following method. A flat plate is provided with a perforated section. The fiber based burner deck is attached to this flat metal plate; and the plate with the fiber based burner deck is mechanically deformed - e.g. via deep drawing - such that the metal plate obtains the shape as in the invention, including with the flange along the full circumference of the metal plate; and with the fiber based burner deck attached to it.
  • Preferably, the perforated section comprises a combination of slots and circular perforations. More preferably, the slots are rectangular slots and the long sides of all rectangular slots are parallel to each other.
  • In a preferred embodiment, the fiber based burner deck is a weft knitted fabric and the perforated section comprises a combination of rectangular slots and circular perforations, wherein the long sides of all rectangular slots are parallel to each other. The weft direction of the weft knitted fabric is perpendicular to the long sides of the rectangular slots.
  • Preferably, the flange has a rectangular circumference, possibly with rounded corners.
  • Preferably, the inner circumference of the flange is rectangular.
  • Preferably, the flange is provided for mounting the burner in a heating appliance.
  • Preferably, the fiber based burner deck is provided by a rectangular piece of cloth.
  • The second aspect of the invention is a heat cell comprising a heat exchanger and a burner as in the first aspect of the invention. The burner is installed in the heat exchanger. The burner is provided for the production of flue gas. The heat exchanger comprises channels for flow of the flue gas. The heat exchanger comprises flow channels for the flow of a fluid to be heated by heat exchange from the flue gas.
    • Brief Description of Figures in the Drawings
    • Figures 1 and 2 show views of a premix gas burner according to the invention.
    • Figures 3 and 4 show cross sections of the burner of figure 2.
    • Figure 5 shows a detail of the perforation pattern of the perforated section of the metal plate.
    Mode(s) for Carrying Out the Invention
  • Figures 1 and 2 show views of an example of a premix gas burner 10 according to the invention. Figure 3 shows a view of the burner of figure 2 along line III-III. Figure 4 shows a view of the burner of figure 2 along line IV-IV.
  • The premix gas burner comprises a metal plate 12 and a fiber based burner deck 40. The metal plate comprises a perforated section 14 and a flange 16. The flange is provided along the full circumference of the metal plate and has a rectangular circumference. The flange is provided for mounting the burner in a heating appliance.
  • The perforated section 14 comprises a plurality of perforations. Figure 5 shows a detail of the perforation pattern of the perforated section of the metal plate. More specifically, the perforation pattern of the burner of the invention comprise a combination of rectangular slots 18 the long sides of which are all parallel to each other; and circular perforations 20.
  • The fiber based burner deck 40 covers the perforations of the perforated section of the metal plate; such that when premix gas is supplied to the premix gas burner, the premix gas flows through the perforations of the perforated section of the metal plate and through the fiber based burner deck to be combusted at the other side of the fiber based burner deck. The fiber based burner deck is provided by a rectangular piece of weftknitted fabric comprising yarns made out of stainless steel fibers. In the exemplary burner, the weft direction of the weft knitted fabric is perpendicular to the long sides of the rectangular slots. The fiber based burner deck is at its edges attached to the metal plate by means of welded bonds. Furthermore, although not essential for the invention, the fiber based burner deck of the exemplary burner is at a plurality of positions over its surface attached to the perforated section of the metal plate by means of welding lines 42 (not shown in figure 1, shown in figure 2); the welding line provide diamond patterns on the fiber based burner deck.
  • The perforated section contains a central segment 22 and four side segments 24. The central segment comprises the center of the perforated section. The central segment and each of the four side segments have a smooth surface; with a smooth surface is meant that no line on the surface has a discontinuous first derivative. In the example, the central segment is flat.
  • An edge of each of the four side segments contacts the edge of the central segment. The side segments are connected to each other via straight line ribs 26. Each of the four side segments is connected to the central segment via a curved rib 28. In the example, all four curved ribs are provided in one plane.

Claims (15)

  1. A premix gas burner (10) comprising
    - a metal plate (12) ; and
    - a fiber based burner deck (40);
    wherein the metal plate (12) comprises a perforated section (14) and a flange (16);
    wherein the flange (16) is provided along the full circumference of the metal plate (12);
    wherein the perforated section (14) comprises a plurality of perforations;
    wherein the fiber based burner deck (40) covers the perforations of the perforated section (14) of the metal plate (12); such that when premix gas is supplied to the premix gas burner (10), the premix gas flows through the perforations of the perforated section (14) of the metal plate (12) and through the fiber based burner deck (40) to be combusted at the other side of the fiber based burner deck (40);
    characterised in that:
    the perforated section (14) comprises - and preferably consists out of - a central segment (22) and four side segments (24);
    wherein an edge of each of the four side segments (24) contacts the edge of the central segment (22);
    wherein the side segments (24) are connected to each other via ribs (26);
    and wherein each of the four side segments (24) is connected to the central segment (22) via a curved rib (28).
  2. Burner as in claim 1, wherein the central segment (22) and each of the four side segments (24) have a smooth surface; with a smooth surface is meant that no line on the surface has a discontinuous first derivative.
  3. Burner as in any of the preceding claims, wherein the central segment (22) is flat.
  4. Burner as in any of the preceding claims, wherein all four curved ribs (28) are provided in one plane.
  5. Burner as in any of the preceding claims, wherein the fiber based burner deck (40) is provided by one single woven, braided or knitted textile fabric.
  6. Burner as in any of the preceding claims, wherein the fiber based burner deck (40) is at its edges attached to the metal plate (12), e.g. by means of welded bonds.
  7. Burner as in any of the preceding claims, wherein the fiber based burner deck (40) is at a plurality of discrete positions or lines over its surface attached to the perforated section (14) of the metal plate (12); or wherein the fiber based burner deck (40) is welded over its full surface to the perforated section (14) of the metal plate (12).
  8. Burner as in claim 7; wherein welds (42) are provided according to diamond patterns on the fiber based burner deck (40).
  9. Burner as in any of the preceding claims; wherein the perforated section (14) comprises a combination of slots and circular perforations.
  10. Burner as in claim 9; wherein the slots are rectangular slots and wherein the long sides of all rectangular slots are parallel to each other.
  11. Burner as claim 10,
    wherein the fiber based burner deck (40) is a weft knitted fabric;
    and wherein the weft direction of the weft knitted fabric is perpendicular to the long sides of the rectangular slots.
  12. Burner as in any of the preceding claims, wherein the flange (16) has a rectangular circumference, possibly with rounded corners.
  13. Burner as in any of the preceding claims, wherein the flange (16) is provided for mounting the burner in a heating appliance.
  14. Burner as in any of the preceding claims, wherein the fiber based burner deck (40) is provided by a rectangular piece of cloth.
  15. Heat cell comprising a heat exchanger; and a burner (10) as in any of the preceding claims;
    wherein the burner is installed in the heat exchanger
    wherein the burner is provided for the production of flue gas;
    wherein the heat exchanger comprises channels for flow of the flue gas;
    wherein the heat exchanger comprises flow channels for the flow of a fluid to be heated by heat exchange from the flue gas.
EP18173554.9A 2018-05-22 2018-05-22 Premix gas burner Active EP3572728B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18173554.9A EP3572728B1 (en) 2018-05-22 2018-05-22 Premix gas burner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP18173554.9A EP3572728B1 (en) 2018-05-22 2018-05-22 Premix gas burner

Publications (2)

Publication Number Publication Date
EP3572728A1 EP3572728A1 (en) 2019-11-27
EP3572728B1 true EP3572728B1 (en) 2022-04-06

Family

ID=62222498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18173554.9A Active EP3572728B1 (en) 2018-05-22 2018-05-22 Premix gas burner

Country Status (1)

Country Link
EP (1) EP3572728B1 (en)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2050298A (en) 1934-04-25 1936-08-11 Thos Firth & John Brown Ltd Metal reducing method
US3394213A (en) 1964-03-02 1968-07-23 Roehr Prod Co Inc Method of forming filaments
US3277564A (en) 1965-06-14 1966-10-11 Roehr Prod Co Inc Method of simultaneously forming a plurality of filaments
CA1320616C (en) 1987-12-09 1993-07-27 Akira Yanagisawa Fiber manufacturing method and apparatus therefor
WO2013164159A1 (en) 2012-05-03 2013-11-07 Bekaert Combustion Technology B.V. Gas premix burner
EP2914903B1 (en) * 2012-10-31 2018-03-21 Bekaert Combustion Technology B.V. Gas premix burner
TR201910322T4 (en) * 2013-07-02 2019-07-22 Bekaert Combustion Tech Bv Gas premix burner.
EP3064831A1 (en) * 2015-02-16 2016-09-07 Worgas Bruciatori S.r.l. Gas burner for a heater

Also Published As

Publication number Publication date
EP3572728A1 (en) 2019-11-27

Similar Documents

Publication Publication Date Title
EP3017098B1 (en) Gas premix burner
US6065963A (en) Conical surface burner
EP2914903B1 (en) Gas premix burner
EP2789911B1 (en) Gas premix burner
US5473133A (en) Projection resistance welding method
EP1681378A2 (en) Metal fiber yarn and fabric comprising metal fiber yarn
EP3017099B1 (en) Premix gas burner
EP3572728B1 (en) Premix gas burner
US20100146922A1 (en) Wound Wire Filter Elements
EP3544710B1 (en) Heat transfer tube
CN110621934A (en) Internal ignition premixed gas burner
WO2019193025A1 (en) Conical premix gas burner
EP2844920B1 (en) Gas premix burner
CN113106237A (en) Small-joint-pipe fillet weld heat treatment armored heating sheet
WO2016165994A1 (en) Inwardly burning surface stabilized gas premix burner
US3487517A (en) Papermaking rolls
WO2019011736A1 (en) Premix gas burner
US20230147789A1 (en) Combustion membrane for a gas burner
KR20080097797A (en) Seat structure of trap device for preventing flame of internal engine
CN206145798U (en) Machine in baffle rotation shaft and air conditioning
GB1594435A (en) Flame spreading attachment for a blow torch
CN117433016A (en) Combustion film for gas burner made of continuous fiber thread
EP2032232A1 (en) Wound wire filter elements
JPH0377716A (en) Manufacture of lined tube
EP2690360A1 (en) Seamless cylindrical metal fiber mat and method of manufacturing the same

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200520

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20211011

INTG Intention to grant announced

Effective date: 20211027

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 1481670

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220415

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602018033233

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: NL

Ref legal event code: FP

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1481670

Country of ref document: AT

Kind code of ref document: T

Effective date: 20220406

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220808

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220706

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220707

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220706

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220806

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602018033233

Country of ref document: DE

REG Reference to a national code

Ref country code: BE

Ref legal event code: MM

Effective date: 20220531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: MC

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220522

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220531

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220531

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20230110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220522

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220606

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20220406

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20220531

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230619

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20230519

Year of fee payment: 6

Ref country code: IT

Payment date: 20230526

Year of fee payment: 6

Ref country code: DE

Payment date: 20220620

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20230524

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20180522