EP3513123A1 - Vorgemischgasbrenner - Google Patents
VorgemischgasbrennerInfo
- Publication number
- EP3513123A1 EP3513123A1 EP17761904.6A EP17761904A EP3513123A1 EP 3513123 A1 EP3513123 A1 EP 3513123A1 EP 17761904 A EP17761904 A EP 17761904A EP 3513123 A1 EP3513123 A1 EP 3513123A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- burner
- premix gas
- wire mesh
- woven wire
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 claims abstract description 65
- 239000002184 metal Substances 0.000 claims abstract description 65
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000007493 shaping process Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 41
- 238000002485 combustion reaction Methods 0.000 description 6
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/12—Radiant burners
- F23D14/14—Radiant burners using screens or perforated plates
- F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
Definitions
- the invention relates to the field of premix gas burners, more particularly to surface
- stabilized premix gas burners comprising a woven wire mesh as burner deck.
- US5474443A discloses a premix gas burner with a hemispherical burner deck out of a woven wire mesh.
- US2005/172915 shows a premix gas burner having a woven wire mesh combustion surface comprising rigidizing ribs.
- EP2876369A1 discloses a gas burner for a boiler.
- the burner comprises a combustion membrane with a diffuser layer in the shape of a three-dimensional shell forming an outer combustion surface with at least one double-curvature region.
- the combustion surface comprises a first portion formed by a perforated metal sheet, and a second portion formed by a permeable fibre- or thread-based material.
- US201401 1 143A discloses a gas boiler burner comprising a diffuser, suitable for diffusing premixed fuel gases in a combustion chamber.
- the diffuser comprises a diffuser central portion and two diffuser longitudinally peripheral portions.
- the two diffuser longitudinally peripheral portions are connected together through the central diffuser portion.
- the central diffuser portion extends longitudinally in a direction perpendicular to the flow of the fuel gases over a length I greater than zero and has transversal cross-sections shaped as a circumference arc having a uniform radius of curvature r.
- Each of the diffuser longitudinally peripheral portions are shaped as a portion of a sphere having radius r.
- US2016040905A discloses a burner assembly comprising a diffuser plate and a plurality of burners.
- the burners are preferably defined in a unitary mesh structure, for example being stamped or pressed into mesh structure.
- the first aspect of the invention is a premix gas burner.
- the premix gas burner comprises a metal plate structure for mounting the premix gas burner in a heating appliance.
- the metal plate structure can comprise or preferably consists out of one metal plate; or can comprise more than one metal plate, e.g. two metal plates, preferably connected to each other.
- the premix gas burner comprises a burner deck.
- the burner deck comprises - and preferably consists out of - a woven wire mesh on the outer surface of which premix gas is combusted after the premix gas has flown through the woven wire mesh.
- One or more than one opening is provided in the metal plate structure.
- the circumferential edge of the woven wire mesh comprises at least one tab; and preferably a plurality of tabs.
- each tab is inserted through an opening in the metal plate structure.
- the tab or tabs comprises or consists out of woven wire mesh.
- the woven wire mesh burner deck of surface stabilized premix gas burners warms up when the burner is in use.
- the woven wire mesh burner deck needs to be able to cope with the stresses induced by the thermal expansion associated with the high temperature when the burner is in use and by the shrinkage when the burner is not in use. If this is not the case, early mechanical failure of the burner deck will occur.
- the premix gas burner of the invention has shown to be very well suited to withstand thermal expansion and shrinkage, resulting in a long lifetime of the premix gas burner.
- Preferred tabs have a substantially rectangular shape.
- Preferred tabs have a width between 4 and 20 mm; more preferred between 6 and 12 mm.
- Preferred tabs have a height between 1 to 12 mm; more preferably between 3 and 6 mm.
- Preferred tabs have a largest width between 4 and 20 mm; more preferably between 6 and 12 mm. Preferred tabs have a largest height between 3 and 6 mm.
- the woven wire mesh has a thickness between 0.6 and 1.3 mm.
- a woven wire mesh of 0.9 mm thickness can be advantageously used in the invention.
- At least one tab is bent such that an included angle less than 180° is provided between the tab inserted through the opening and the section of the woven wire mesh at the other side of the opening.
- all tabs are bent such that an included angle less than 180° is provided between the tab through the opening and the section of the woven wire mesh at the other side of the opening.
- the included angle is less than 150°, even more preferably less than 120°.
- the included angle is more than 30°, even more preferably more than 60°, even more preferably more than 90°.
- Embodiments wherein at least one tab is bent ensure that the woven wire mesh is better held in place in applications where the burner is used with the burner deck facing downwards; and contribute to the realization of a longer lifetime of the burner deck and the burner.
- the burner deck is provided in a convex shape. It is meant that when the burner is in operation, the flames of the burner are anchored onto the convex side of the burner deck. More preferably, the full surface of the burner deck is provided in a convex shape; meant is that when the burner is in operation, the full surface of the burner deck at the side of which the flames are anchored has a convex shape.
- the woven wire mesh does not comprise ribs nor
- the woven wire mesh comprises ribs and/or embossments.
- the circumference of the burner deck has the shape of a rectangle of which the two short sides have been rounded. More preferably, the short sides of the rectangle are continuously rounded.
- tabs are only provided along the two long sides of the rectangular shape of the circumference of the burner deck. Meant is that no tabs are provided along the - possibly continuously - rounded short sides. Burners according to this embodiment are even better suited for long lifetime use, as the absence of tabs along the short sides allows better thermal expansion of the woven wire mesh in its length direction.
- the metal plate structure comprises a groove.
- the width of the groove is larger than the thickness of the woven wire mesh.
- At least part of the - and preferably the complete - circumferential edge of the woven wire mesh is positioned in the groove.
- Such embodiments synergistically add to provide a burner with a long life time.
- the width of the groove is wider than the thickness of the woven wire mesh, a certain amount of movement of the woven wire mesh relative to the metal plate structure is provided.
- such embodiments have an additional benefit, in that less risk of flame flashback via the edges of the woven wire mesh exists.
- the depth of the groove is at least 1 mm, more preferably at least 2 mm.
- the width of the groove is at least 0.1 mm larger than the thickness of the woven wire mesh. More preferably the width of the groove is at least 0.3 mm larger than the thickness of the woven wire mesh. Preferably, the width of the groove is less than 0.8 mm larger than the thickness of the woven wire mesh.
- the depth of the groove is a least three times the difference between the width of the groove and the thickness of the woven wire mesh.
- Such embodiments provide burners that have a long lifetime; as such burners are even better suited to cope with the thermal stresses on the woven wire mesh burner deck in use of the burner.
- the metal plate structure comprises a groove and wherein the circumference of the burner deck has the shape of a rectangle but with the two short sides - preferably continuously - rounded; preferably the width of the groove is larger in the two - preferably continuously - rounded short sides than along the two long sides of the rectangular shape of the circumference of the burner deck.
- Burners according to this embodiment are even better suited for long lifetime use, as the absence of tabs along the short sides in combination with the wider groove at the short side allows better thermal expansion of the woven wire mesh in length direction.
- the metal structure comprises a groove
- a number of slits are provided in the plate structure at the bottom of the groove.
- the circumferential edge of the woven wire mesh comprises a number of tabs spread along the complete circumferential edge of the woven wire mesh; and each tab is inserted through a slit.
- Preferred premix gas burners comprise a perforated plate segments through which the premix gas flows before the premix gas flows through the woven wire mesh.
- the perforated plate segment is provided to distribute the premix gas more evenly over the surface of the burner deck; and therefore, contributes to the prolonged lifetime of the burner. More preferably, all zones of the perforated plate segment provided with perforations are provided at a distance of at least 1 mm from the woven wire mesh; and preferably at a distance of less than 3 mm. Such embodiments contribute to the ability to produce burners that have a long lifetime.
- the metal plate structure comprises a first metal plate for mounting the burner in a heating appliance and a second metal plate comprising the perforated plate segment.
- the metal plate structure comprises a groove, preferably one side of the groove is provided by the first metal plate; and the other side of the groove is provided by the second metal plate.
- the metal plate structure comprises a metal plate.
- the metal plate comprises sections for mounting the burner in a heating appliance as well as the perforated plate segment.
- the metal plate structure comprises a groove, preferably the groove is provided by shaping the metal plate; e.g. by means of deep drawing of the metal plate.
- the second aspect of the invention is a condensing boiler comprising a premix gas
- the condensing boiler comprises a cast aluminium heat exchanger.
- Figures 1 and 2 show a premix gas burner according to the invention.
- Figures 3, 4 and 5 show cross sections of premix gas burners according to the invention.
- Figure 6 illustrates the included angle between the tab inserted through the opening and the section of the woven wire mesh at the other side of the opening.
- Figures 1 and 2 show a premix gas burner according to the first aspect of the invention.
- Figure 1 shows the burner at the side of the burner deck where the combustion occurs
- figure 2 shows the burner from the side from which premix gas is supplied.
- the premix gas burner comprises a metal plate structure 105 for mounting the premix gas burner in a heating appliance, a burner deck 1 10 and a groove 1 15 (not visible in figure 1 , the groove can be observed from its bottom in figure 2) in the metal plate structure 105.
- the burner deck 1 10 consists out of a woven wire mesh on the outer surface of which premix gas is combusted after the premix gas has flown through the woven wire mesh.
- the burner deck is provided in a convex shape over the full surface of the burner deck.
- the woven wire mesh does not comprise ribs or embossments.
- the circumference of the burner deck of the exemplary burner has the shape of a rectangle of which the two short sides have been continuously rounded; other circumferential shapes of the burner deck are possible however.
- the width of the groove 105 is larger than the thickness of the woven wire mesh.
- a number of openings 120 are provided in the bottom of the groove 1 15. The openings can e.g. take the form of slits at the bottom of the groove.
- the circumferential edge of the woven wire mesh is positioned in the groove 1 15.
- the circumferential edge of the woven wire mesh comprises a number of tabs 125; each tab is inserted through an opening in the bottom of the groove.
- tabs are only provided along the two long sides of the rectangular shape of the circumference of the burner deck.
- the width of the groove is larger in the two continuously rounded short sides than along the two long sides of the rectangular shape of the circumference of the burner deck.
- the tabs are bent (not shown in figure 2, but is illustrated in figure 6) with respect to the surface of the burner deck, such that the woven wire mesh is better held in the premix gas burner.
- the exemplary burner comprises a perforated plate 130 through which the premix gas flows before the premix gas flows through the woven wire mesh.
- FIGS 3, 4 and 5 show cross sections of three different executions of burners according to the first aspect of the invention.
- Figure 3 shows a cross section 300 according to plane A1-A1 of figure 1 of the exemplary burner shown in figures 1 and 2.
- the metal plate structure 305 comprises a metal plate comprising sections 307 for mounting the burner in a heating appliance as well as the perforated plate segment 330.
- the metal plate structure (one metal plate) 305 is shaped by punching and deep drawing.
- the metal plate 305 comprises a groove 315, with openings 320.
- the circumferential edge of the woven wire mesh 310 is positioned in the groove 315.
- the tabs 325 at the circumferential edge of the woven wire mesh 310 are inserted through openings 320 in the bottom of the groove 315 (the cross section shown in figure 3 crosses through tabs at both sides of the burner).
- all zones of the perforated plate segment 330 provided with perforations are provided at a distance of at least 1 mm from the woven wire mesh 310; and preferably at a distance of less than 3 mm.
- the depth D of the groove is 2 mm and the width W of the groove 1 .5 and the thickness of the woven wire mesh is 0.9 mm.
- the tabs are bent (not shown in figure 3) - more preferably to the inside of the burner - such that an included angle less than 180° - and preferably less than 150° - is created between the tab inserted through the opening and the section of the woven wire mesh at the other side of the opening.
- FIG. 4 shows a cross section 400 of a burner according to an alternative embodiment of the invention.
- the metal plate structure 405 comprises a metal plate.
- the metal plate comprises sections 407 for mounting the burner in a heating appliance as well as the perforated plate segment 430. Premix gas flows through the perforations of the perforated plate segment 430 before the premix flows through the woven wire mesh burner deck 410 to be combusted at the other side of the woven wire mesh burner deck 410.
- the metal plate structure (one metal plate) 405 is shaped by punching and deep drawing.
- the metal plate 405 comprises openings 420, but no groove.
- the tabs 425 at the circumferential edge of the woven wire mesh 410 are inserted through the openings (the cross section shown in figure 4 crosses through tabs at both sides of the burner).
- all zones of the perforated plate segment 430 provided with perforations are provided at a distance of at least 1 mm from the woven wire mesh 410; and preferably at a distance of less than 3 mm.
- the tabs are bent (not shown in figure 4) - more preferably to the inside of the burner - such that an included angle less than 180° - and preferably less than 150° - is created between the tab inserted through the opening and the section of the woven wire mesh at the other side of the opening.
- FIG. 5 shows a cross section 500 of a burner according to an alternative embodiment of the invention.
- the metal plate structure 505 comprises a first metal plate 507 for mounting the burner in a heating appliance and a second metal plate 530 comprising the perforated plate segment. Premix gas flows through the perforated plate segment before the premix gas flows through the woven wire mesh burner deck 510 to be combusted at the other side of the woven wire mesh burner deck 510.
- a groove 515 is provided in the metal plate structure 505.
- One side of the groove 515 is provided by the first metal plate 507; and the other side of the groove is provided by the second metal plate 510.
- the circumferential edge of the woven wire mesh 510 is positioned in the groove 515.
- the tabs 525 at the circumferential edge of the woven wire mesh 510 are inserted through openings 520 in the bottom of the groove 515 (the cross section shown in figure 5 crosses through tabs at both sides of the burner).
- the depth of the groove is 2 mm and the width of the groove 1 .5 mm and the thickness of the woven wire mesh is 0.9 mm.
- the tabs are bent (not shown in figure 5) - more preferably to the inside of the burner - such that an included angle less than 180° - and preferably less than 150° - is created between the tab inserted through the opening and the section of the woven wire mesh at the other side of the opening.
- Figure 6 illustrates the included angle between the tab inserted through the opening and the section of the woven wire mesh at the other side of the opening.
- Figure 6 shows part of an inventive burner.
- Figure 6 shows part of the metal plate structure 605 for mounting the burner, part of the perforated metal plate 630, the groove 615, part of the woven wire mesh 610 and a tab 625 inserted through an opening in the bottom of the groove.
- Figure 6 illustrates how the tab is preferably bent such that an included angle alpha (a) is created between the tab 615 inserted through the opening and the section of the woven wire mesh 610 at the other side of the opening.
- the included angle is less than 150°.
- the tab is bent to the inside of the burner.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gas Burners (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP16188444 | 2016-09-13 | ||
PCT/EP2017/072684 WO2018050578A1 (en) | 2016-09-13 | 2017-09-11 | Premix gas burner |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3513123A1 true EP3513123A1 (de) | 2019-07-24 |
EP3513123B1 EP3513123B1 (de) | 2021-02-17 |
Family
ID=56920603
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17742700.2A Active EP3513122B1 (de) | 2016-09-13 | 2017-07-13 | Vorgemischgasbrenner |
EP17761904.6A Active EP3513123B1 (de) | 2016-09-13 | 2017-09-11 | Vorgemischgasbrenner |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17742700.2A Active EP3513122B1 (de) | 2016-09-13 | 2017-07-13 | Vorgemischgasbrenner |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP3513122B1 (de) |
JP (2) | JP2019526777A (de) |
KR (1) | KR102368554B1 (de) |
CN (3) | CN109716023B (de) |
WO (2) | WO2018050310A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110832253A (zh) * | 2017-07-13 | 2020-02-21 | 贝卡尔特燃烧技术股份有限公司 | 预混合气体燃烧器 |
EP3781866B1 (de) * | 2018-04-19 | 2022-05-04 | Bekaert Combustion Technology B.V. | Vorgemischgasbrenner |
EP3781865A1 (de) | 2018-04-19 | 2021-02-24 | Bekaert Combustion Technology B.V. | Vorgemischgasbrenner |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3857670A (en) * | 1973-03-29 | 1974-12-31 | Int Magna Corp | Radiant burner |
DE8714532U1 (de) * | 1987-10-31 | 1987-12-10 | Ruhrgas Ag, 4300 Essen | Überstöchiometrisch vormischender Gasbrenner für Gasheizgeräte |
DE59302359D1 (de) | 1992-06-13 | 1996-05-30 | Viessmann Werke Kg | Strahlungsbrenner für heizkessel |
CN2303185Y (zh) * | 1997-02-03 | 1999-01-06 | 宋焕臣 | 一种燃气红外燃烧器 |
DE19749150A1 (de) * | 1997-11-06 | 1999-05-27 | Bosch Gmbh Robert | Gebläsebrenner |
JP2001241617A (ja) * | 2000-02-28 | 2001-09-07 | Noritz Corp | 燃焼装置 |
US7665426B2 (en) | 2004-02-05 | 2010-02-23 | Beckett Gas, Inc. | Burner |
IT1402900B1 (it) * | 2010-11-24 | 2013-09-27 | Worgas Bruciatori Srl | Bruciatore ad elevata stabilita' |
IT1406865B1 (it) * | 2011-01-12 | 2014-03-14 | Worgas Bruciatori Srl | Bruciatore ad elevata stabilita' perimetrale |
CN202676515U (zh) * | 2012-05-29 | 2013-01-16 | 南京科朗分析仪器有限公司 | 防高温变形取样装置 |
GB2511029A (en) * | 2012-12-19 | 2014-08-27 | Worgas Burners Ltd | Gas burner |
EP2789911B1 (de) * | 2013-04-09 | 2016-07-20 | Bekaert Combustion Technology B.V. | Gasvormischbrenner |
TR201910916T4 (tr) * | 2013-07-02 | 2019-08-21 | Bekaert Combustion Tech Bv | Ön karışım gaz brülörü. |
ITMI20131968A1 (it) * | 2013-11-26 | 2015-05-27 | Worgas Bruciatori Srl | Bruciatore |
US9772119B2 (en) | 2014-08-06 | 2017-09-26 | Rheem Manufacturing Company | Fuel-fired heating appliance having improved burner assembly |
EP3064831A1 (de) * | 2015-02-16 | 2016-09-07 | Worgas Bruciatori S.r.l. | Gasbrenner für ein heizgerät |
-
2017
- 2017-07-13 CN CN201780056117.3A patent/CN109716023B/zh active Active
- 2017-07-13 WO PCT/EP2017/067681 patent/WO2018050310A1/en unknown
- 2017-07-13 EP EP17742700.2A patent/EP3513122B1/de active Active
- 2017-07-13 JP JP2019513078A patent/JP2019526777A/ja active Pending
- 2017-07-13 KR KR1020197006849A patent/KR102368554B1/ko active IP Right Grant
- 2017-09-11 EP EP17761904.6A patent/EP3513123B1/de active Active
- 2017-09-11 CN CN201780055682.8A patent/CN109690190B/zh active Active
- 2017-09-11 WO PCT/EP2017/072684 patent/WO2018050578A1/en unknown
- 2017-09-11 JP JP2019513068A patent/JP2019526776A/ja active Pending
- 2017-09-11 CN CN202010901845.3A patent/CN112050208A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
CN109690190B (zh) | 2020-09-22 |
EP3513123B1 (de) | 2021-02-17 |
JP2019526777A (ja) | 2019-09-19 |
EP3513122B1 (de) | 2020-12-16 |
CN109716023B (zh) | 2021-06-18 |
CN112050208A (zh) | 2020-12-08 |
JP2019526776A (ja) | 2019-09-19 |
WO2018050578A1 (en) | 2018-03-22 |
CN109716023A (zh) | 2019-05-03 |
CN109690190A (zh) | 2019-04-26 |
KR20190045211A (ko) | 2019-05-02 |
WO2018050310A1 (en) | 2018-03-22 |
EP3513122A1 (de) | 2019-07-24 |
KR102368554B1 (ko) | 2022-03-02 |
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