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EP2510281B1 - Brenner mit brennerdeck mit geringer porosität - Google Patents

Brenner mit brennerdeck mit geringer porosität Download PDF

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Publication number
EP2510281B1
EP2510281B1 EP10782307.2A EP10782307A EP2510281B1 EP 2510281 B1 EP2510281 B1 EP 2510281B1 EP 10782307 A EP10782307 A EP 10782307A EP 2510281 B1 EP2510281 B1 EP 2510281B1
Authority
EP
European Patent Office
Prior art keywords
burner
deck
gas
porosity
metal plate
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
EP10782307.2A
Other languages
English (en)
French (fr)
Other versions
EP2510281A1 (de
Inventor
Dirk Ten Hoeve
Dinand Lamberts
Camillo Marino Josef Hogenbirk
Bram De Jager
Koen Vanoverberghe
Gertjan Zwiggelaar
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 NV SA
Bekaert Combustion Technology BV
Original Assignee
Bekaert NV SA
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
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Application filed by Bekaert NV SA, Bekaert Combustion Technology BV filed Critical Bekaert NV SA
Priority to EP17191076.3A priority Critical patent/EP3282187B1/de
Priority to EP10782307.2A priority patent/EP2510281B1/de
Publication of EP2510281A1 publication Critical patent/EP2510281A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • F23D14/105—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head with injector axis parallel to the burner head axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
    • F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
    • F23D14/10—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner with elongated tubular burner head
    • 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
    • F23D14/26—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid with provision for a retention flame
    • 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
    • F23D2203/1012—Flame diffusing means characterised by surface shape tubular
    • 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
    • F23D2203/1023—Flame diffusing means using perforated plates with specific free passage areas

Definitions

  • the present invention relates to a premix burner, more in particular a burner having a flameholder made of perforated metal plate material.
  • the burner is a tubular burner having a cylindrical shape. These burners are especially suitable for use in combustion boilers.
  • premix burner consist of one or more of the following components: a) an end cap located at the top of the burner, b) a burner deck, the burner deck consists of a blind piece at the bottom, a perforated piece, with a regular (circular) pattern, with sometimes locally an additional modification for ignition purposes, in the centre part and a blind piece at the top.
  • the pattern is mostly circumferential, and mostly repeating itself in height after a pitch of 1-10 mm; c) a distributor, having a blind piece at the bottom, a perforated part in the centre and a blind piece at the top; d) a distributor end cap; e) a flange; f) an anti noise tube which is a device located in or nearby the flange to adjust the pressure distribution.
  • a distributor having a blind piece at the bottom, a perforated part in the centre and a blind piece at the top
  • d) a distributor end cap e) a flange; f) an anti noise tube which is a device located in or nearby the flange to adjust the pressure distribution.
  • Such premix burners are described in e.g. EP 1337789 , EP2037175 , WO2009/077333 , WO2009/065733 , WO2009/059933 .
  • these burners are provided with devices in the mixing chamber, such as e.g
  • an inner liner also called distributor and/or anti-noise tube or other devices such as swirls or perforated disks in or nearby the flange.
  • distributor and/or anti-noise tube or other devices such as swirls or perforated disks in or nearby the flange.
  • the object of the present invention is to obviate the drawbacks mentioned above.
  • An object of the present invention is to provide a premix burner which does not need such devices in the mixing chamber of the burner to obtain a good stability of the flames and to reduce or even eliminate noise problems.
  • a further object of the present invention is to provide a premix burner with a good stability over the full operating range of high to low CO 2 , and for the full band of customary or natural gas qualities.
  • This full band of customary and natural gas qualities covers all gases selected from hydrocarbons such as methane, ethane, propane, butane, ethene, propene, butene, acetylene, and the like.
  • hydrocarbons such as methane, ethane, propane, butane, ethene, propene, butene, acetylene, and the like.
  • the present invention does not relate specifically to high reactive fuel gases, which are a mixture of hydrogen and customary fuel gases.
  • a further object of the present invention is to provide a premix burner producing low NOx levels.
  • An aspect of the claimed invention provides a gas burner as described in claim 1.
  • the present invention provides a gas burner as described above wherein the burner further comprises an end cap connected to the perforated metal plate substantially opposite to said gas inlet port.
  • the present invention provides a gas burner as described in paragraph 8, wherein the end cap is also provided with perforations. These perforations thereby enlarge and are part of the burner deck.
  • the end cap is made of metal plate material.
  • the perforation patterns in the end cap and in the perforated metal plate are equal.
  • the perforation patterns in the end cap and in the perforated metal plate are different.
  • the perforations, such as e.g. slots and holes, in the end cap and in the perforated metal plate are equal.
  • the perforations in the end cap and in the perforated metal plate are different.
  • the burner of claim 1 has a burner deck wherein more than 50% of the burner deck has a porosity being equal to or lower than 9% and wherein upto 50% of the burner deck has a porosity being higher than 11 % and with an overall porosity which is equal to or lower than 11 %.
  • This modification of the perforation pattern of the burner deck provided a burner which, next to the effect of the deletion of the diffuser and the removal of the humming noise, also had a more stable response on the second and higher Helmholtz or instable acoustic resonances of the heat exchanger, which therefore made that the boiler, with this build in burner did not provoke a whistling sound anymore.
  • Another aspect of the claimed invention provides a gas burner as described in [0007], [0008], [0009] or [0011] wherein the burner deck has different patterns of perforations. Adding more patterns with different pitches showed an increased stability for a broader range of gas qualities and induced less NOx-emissions.
  • the burner is provided with an abrupt and stepwise variation of the perforation pattern in the burner deck.
  • the present invention provides a burner with gradually increasing or decreasing perforation pattern or gradually increasing or decreasing pitches in between the perforation pattern of the burner deck.
  • This grading can go in axial or circumferential direction.
  • Gradually increasing or decreasing the perforation of the decks allows an almost step less variety of the perforation, and thus creating a varying perforation of the surface of the deck.
  • the burner has a completely random deck with no repeatability over the full height or circumference of the burner deck which provides a stabilized deck without the additional devices as mentioned above.
  • the part with a porosity higher than 11 % is closest to the gas inlet.
  • the part with a porosity equal to or lower than 9% is most remote, i.e. downstream, from the gas inlet.
  • burner deck is to be understood, in the light of this invention, to be that part of the burner where the totality of perforations are present. In case two or more distinct regions of perforations can be detected on the burner surface, the burner deck is defined as being the surface spanning of all regions with perforations.
  • all porosity of the burner deck is to be understood, in the light of this invention, as ratio of the surface of the holes, slots or other openings divided by the surface of the burner over which the perforated part(s) is(are) located.
  • perforation pattern is to be understood, in the light of this invention, to be a recurring scheme of perforations.
  • FIG. 1 shows a gas burner 10, preferably a premix burner, comprising a support or flange 12 which has a central gas inlet port 14 for supply of gas into a gas supply or mixing chamber 16.
  • the gas supply chamber 16 is enclosed by a perforated metal plate 22.
  • the perforated metal plate 22 is connected at the bottom to the support or flange 12 through a base section.
  • the perforations 24 in the perforated metal plate 22 provide the burner deck 20.
  • the burner deck 20 has an overall porosity which is equal to or lower than 11 %, preferably lower than 10%, even more preferably lower than 9%.
  • Figure 2A shows a perspective view of a burner.
  • Figure 2B shows a cross sectional view taken along the line II-II' in Figure 2A.
  • Figures 2A and 2B shows a gas burner 10, preferably a premix burner, comprising a support or flange 12 which has a central gas inlet port 14 for supply of gas into a gas supply or mixing chamber 16.
  • the gas supply chamber 16 is enclosed by a perforated metal plate 22 and an end cap 18 substantially opposite to said gas inlet port 14.
  • the perforations 24 in the perforated metal plate 22 provide the burner deck 20.
  • the end cap 18 is connected to the top of the perforated metal plate 22 and the perforated metal plate 22 is connected at the bottom to the support or flange 18 through a base section.
  • the burner deck 20 has an overall porosity which is equal to or lower than 11%, preferably lower than 10%, even more preferably lower than 9%.
  • a burner 10 with a perforation pattern as shown in figure 2C has a length of 102,4mm and diameter of 70,4mm.
  • the burner deck has a length of 81,2 mm and has a porosity of 7,7%.
  • the perforation pattern in the perforated plate is a combination of slits and round holes. For a thickness of the perforated plate of 0,6 mm, the slits being 4,0x0,5mm, the holes having a diameter of 0,8mm.
  • the perforations are grouped in a pattern of 4,8 mm and this pattern is repeated over the burner deck in an equal division. As explained above, this burner still needed an anti-noise device, but no pressure divider or distributor anymore.
  • An aspect of the present invention provides a burner 10 wherein the end cap 18 is also provided with perforations.
  • Figure 3 shows an exemplary burner wherein the end cap is provided with perforations 30.
  • the burner deck of this burner is as shown by reference number 20.
  • the present invention provides a burner 10 with a burner deck wherein more than 50% of the burner deck has a porosity being equal to or lower than 9% and wherein 10 to 50% of the burner deck has a porosity being higher than 11 %.
  • the burner deck has an overall porosity which is equal to or lower than 11%.
  • a burner 10 as shown in figure 4 has a length of 94,8mm and diameter of 70,4mm.
  • the burner deck 20 has a length of 93,6mm.
  • the perforation pattern in the perforated plate 22 is a combination of slits and round holes.
  • the thickness of the perforated plate 22 is 0,6 mm, the slits being 4,0x0,5mm, the holes having a diameter of 0,8mm.
  • the perforations are grouped in a pattern as shown in fig. 4 , wherein the first 11,8mm of the burner deck length has a porosity of 15%, thereafter is a zone of 46,8mm of the burner deck length with a porosity of 7,3% and the last zone with a length of 5.8mm of the burner deck length having a porosity of 16,5%.
  • This pattern is repeated over the burner deck on the circumference of the burner. This provides a burner deck which has an overall porosity of 9,8%.
  • This modification of the perforation pattern of the burner deck provided a burner which, next to the effect of the deletion of the diffuser and the removal of the humming noise, also had a more stable response on the second and higher Helmholtz or instable acoustic resonances of the heat exchanger, which therefore made that the burner did not provoke a whistling sound anymore.
  • the humming sound was eliminated and therefore the use of anti-noise devices in the mixing chamber of the burner could be omitted.
  • the use of the relatively high porosity at the beginning and end of the burner deck 20 provide an even more stable flame pattern of the burner.
  • An example embodiment according to a further aspect of the claimed invention provides a gas burner with a perforated metal plate 22 with a perforation pattern as shown in fig. 5 .
  • the shown perforation pattern is repeated over the circumference of the burner.
  • the burner deck 20 has different patterns of perforations. Adding more patterns with different pitches showed an increased stability for a broader range of gas qualities and induced less NOx-emissions.
  • the exemplary perforation pattern of fig. 5 is an abrupt and stepwise variation of the perforation pattern in the burner deck 20.
  • Figure 6 shows another example of a perforation pattern of burner deck 20 according to a preferred aspect of the present invention, wherein the porosity of the burner deck 20 decreases stepwise in downstream direction.
  • the shown perforation pattern is repeated in the perforated metal plate 22 over the circumference of the burner.
  • Figure 7 shows an example of a perforation pattern of burner deck 20 according to a preferred aspect of the present invention, wherein the porosity is gradually increasing. This perforation pattern is repeated in the perforated metal plate 22 over the circumference of the burner.
  • Figure 8 shows an exemplary perforation pattern of the burner deck 20, which is repeated lengthwise over the perforated metal plate 22.
  • Figure 9 shows a further exemplary perforation pattern which is repeated on the circumference of a burner.
  • the perforation pattern is such that no repeat of pattern is occurring along the length of the burner deck 20.
  • An exemplary burner with a length of 91,2mm and diameter of 70,4mm.
  • the burner deck has a length of 70,4mm.
  • the perforation pattern in the perforated plate 22 is a combination of slits and round holes as shown in figure 9 .
  • this burner deck has an overall porosity of 7.5%.
  • any perforation pattern or set of perforation patterns can be repeated lengthwise or over the circumference to obtain the burner according to the present invention.
  • FIG. 10 Another preferred embodiment of the present invention is shown in figure 10 .
  • the burner 10 made out of perforated metal plate 22 has a completely random perforated burner deck 20 with no repeatability over the full height or circumference of the burner deck which provides a stabilized deck without the additional devices as mentioned above.
  • FIG 11 shows another exemplary embodiment of the present invention.
  • This burner has a perforated end cap 24 with different perforation pattern than the perforated metal plate 22.
  • the perforations 30 together with the perforations 24 provide the burner deck 20.

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

Claims (10)

  1. Gasbrenner (10), vorzugsweise Vormischgasbrenner, der einen Träger (12) umfasst, der einen mittigen Gaseinlassanschluss (14) besitzt, um einer Gaszufuhrkammer (16) Gas zuzuführen, wobei die Gaszufuhrkammer (16) von einer zylindrischen, gelochten Metallplatte (22) umschlossen ist, wobei die zylindrische, gelochte Metallplatte (22) an der Unterseite mit dem Träger (12) über einen Basisabschnitt verbunden ist, wobei die Lochung (24) in der zylindrischen, gelochten Metallplatte (22) eine Brennerabdeckung (20) bereitstellt, dadurch gekennzeichnet, dass die Brennerabdeckung (20) eine Gesamtporosität besitzt, die gleich oder niedriger als 11 % ist;
    wobei mehr als 50 % der Brennerabdeckung eine Porosität besitzt, die gleich oder niedriger als 9 % ist, und
    wobei bis zu 50 % der Brennerabdeckung eine Porosität besitzt, die höher als 11 % ist.
  2. Gasbrenner (10) nach Anspruch 1, wobei der Brenner ferner eine Stirnkappe (18) besitzt, die sich im Wesentlichen gegenüber dem Gaseinlassanschluss (14) befindet, wobei die Stirnkappe (18) mit der gelochten Metallplatte (22) verbunden ist.
  3. Gasbrenner nach Anspruch 2, wobei die Stirnkappe (18) ebenfalls mit Lochungen (30) versehen ist, wobei die Lochungen (30) die Brennerabdeckung (20) vergrößern.
  4. Gasbrenner nach einem der vorhergehenden Ansprüche, wobei die Brennerabdeckung unterschiedliche Lochmuster besitzt.
  5. Gasbrenner nach Anspruch 4, wobei die Brennerabdeckung wenigstens zwei unterschiedliche Lochmuster besitzt.
  6. Gasbrenner nach Anspruch 4, wobei die Brennerabdeckung eine sich allmählich ändernde Porosität besitzt.
  7. Gasbrenner nach Anspruch 4, wobei die Brennerabdeckung (20) eine im Wesentlichen vollkommen zufällige Porosität besitzt.
  8. Gasbrenner nach einem der vorhergehenden Ansprüche, wobei der Gasbrenner zwischen den Gaseinlassanschluss (14) und der gelochten Metallplatte (22) keinen Gasdiffusor besitzt.
  9. Verwendung des Gasbrenners nach einem der vorhergehenden Ansprüche in einem Wärmetauscher.
  10. Verwendung des Gasbrenners nach einem der Ansprüche 1 bis 8 in einem Ofen oder einer Luftheizeinrichtung.
EP10782307.2A 2009-12-11 2010-11-26 Brenner mit brennerdeck mit geringer porosität Active EP2510281B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP17191076.3A EP3282187B1 (de) 2009-12-11 2010-11-26 Brenner mit brennerdeck mit geringer porosität
EP10782307.2A EP2510281B1 (de) 2009-12-11 2010-11-26 Brenner mit brennerdeck mit geringer porosität

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP09178982 2009-12-11
PCT/EP2010/068284 WO2011069839A1 (en) 2009-12-11 2010-11-26 Burner with low porosity burner deck
EP10782307.2A EP2510281B1 (de) 2009-12-11 2010-11-26 Brenner mit brennerdeck mit geringer porosität

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP17191076.3A Division-Into EP3282187B1 (de) 2009-12-11 2010-11-26 Brenner mit brennerdeck mit geringer porosität
EP17191076.3A Division EP3282187B1 (de) 2009-12-11 2010-11-26 Brenner mit brennerdeck mit geringer porosität

Publications (2)

Publication Number Publication Date
EP2510281A1 EP2510281A1 (de) 2012-10-17
EP2510281B1 true EP2510281B1 (de) 2017-10-25

Family

ID=42126102

Family Applications (2)

Application Number Title Priority Date Filing Date
EP10782307.2A Active EP2510281B1 (de) 2009-12-11 2010-11-26 Brenner mit brennerdeck mit geringer porosität
EP17191076.3A Active EP3282187B1 (de) 2009-12-11 2010-11-26 Brenner mit brennerdeck mit geringer porosität

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP17191076.3A Active EP3282187B1 (de) 2009-12-11 2010-11-26 Brenner mit brennerdeck mit geringer porosität

Country Status (6)

Country Link
US (1) US20120193452A1 (de)
EP (2) EP2510281B1 (de)
JP (1) JP2013513774A (de)
KR (1) KR101817371B1 (de)
CN (1) CN102597624B (de)
WO (1) WO2011069839A1 (de)

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NL2007646C2 (en) 2011-09-16 2013-03-19 Micro Turbine Technology B V Braided burner for premixed gas-phase combustion.
WO2013107661A2 (en) 2012-01-19 2013-07-25 Bekaert Combustion Technology B.V. Cylindrical gas premix burner
EP2815179A1 (de) 2012-02-16 2014-12-24 Bekaert Combustion Technology B.V. Vorgemischgasbrenner
EP2815181A1 (de) 2012-02-16 2014-12-24 Bekaert Combustion Technology B.V. Vorgemischgasbrenner
WO2013178466A1 (de) 2012-06-01 2013-12-05 Ulrich Dreizler Brenner mit einer oberflächenverbrennung
WO2014016006A1 (de) 2012-07-27 2014-01-30 Ulrich Dreizler Brenner mit einer oberflächenverbrennung
US11378273B2 (en) * 2017-01-11 2022-07-05 A. O. Smith Corporation Reduced resonance burner
WO2019011735A1 (en) * 2017-07-13 2019-01-17 Bekaert Combustion Technology B.V. PREMIX GAS BURNER
NL2024101B1 (en) 2019-10-25 2021-07-19 Bekaert Combustion Tech Bv Surface stabilized fully premixed gas premix burner for burning hydrogen gas, and method for starting such burner
CN114945777A (zh) * 2020-01-08 2022-08-26 贝卡尔特燃烧技术股份有限公司 气体燃烧器和加热器具
IT202200004688A1 (it) * 2022-03-11 2023-09-11 Beckett Thermal Solutions S R L Bruciatore
WO2026009171A1 (en) * 2024-07-04 2026-01-08 Polidoro S.P.A. Metal plate for premix burner

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KR20120102691A (ko) 2012-09-18
WO2011069839A1 (en) 2011-06-16
CN102597624A (zh) 2012-07-18
EP2510281A1 (de) 2012-10-17
CN102597624B (zh) 2015-04-15
JP2013513774A (ja) 2013-04-22
EP3282187B1 (de) 2019-04-10
US20120193452A1 (en) 2012-08-02
EP3282187A1 (de) 2018-02-14
KR101817371B1 (ko) 2018-01-11

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