EP1030107A1 - Vormischbrenner - Google Patents

Vormischbrenner Download PDF

Info

Publication number
EP1030107A1
EP1030107A1 EP00103279A EP00103279A EP1030107A1 EP 1030107 A1 EP1030107 A1 EP 1030107A1 EP 00103279 A EP00103279 A EP 00103279A EP 00103279 A EP00103279 A EP 00103279A EP 1030107 A1 EP1030107 A1 EP 1030107A1
Authority
EP
European Patent Office
Prior art keywords
slots
burner according
burner
diffuser element
apertures
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
Application number
EP00103279A
Other languages
English (en)
French (fr)
Other versions
EP1030107B1 (de
Inventor
Giuseppe Fogliani
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.)
Beckett Thermal Solutions SRL
Original Assignee
Worgas Bruciatori SRL
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 Worgas Bruciatori SRL filed Critical Worgas Bruciatori SRL
Publication of EP1030107A1 publication Critical patent/EP1030107A1/de
Application granted granted Critical
Publication of EP1030107B1 publication Critical patent/EP1030107B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/48—Nozzles
    • F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
    • F23D14/583—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration of elongated shape, e.g. slits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2209/00—Safety arrangements
    • F23D2209/20—Flame lift-off / stability
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2213/00—Burner manufacture specifications

Definitions

  • the invention concerns an improved burner, particularly a so-called modular blade burner.
  • a so-called modular blade burner is a burner provided with a plurality of burner bodies, each of which is a mixing and distributing element for a flow of a mixture of gaseous fuel and air.
  • Said burner bodies are bodies of modular type which may be arranged in bundles.
  • a Venturi tube is provided which opens into a chamber arranged at the outlet of the Venturi tube; said chamber being closed at its upper side by a diffuser provided with apertures, for instance shaped as slots, through which the mixture of gaseous fuel and air is discharged.
  • Longer slots are provided at regular intervals along the rows of slots, or at the end of each group of slots if the rows of slots are divided into sections; said longer slots having a length substantially equal to the width of two adjacent rows of slots, or groups of slots, plus the width of the central region comprised therebetween.
  • the function of said longer slots is to limit the strains, and therefore the phenomena of mechanical fatigue, of the diffuser caused by temperature variations and to differences of temperature between the regions of diffuser provided with slots and the regions of diffuser without slots.
  • the diffuser is made of a steel having a high resistance to thermal stresses caused by the high temperatures reached by the diffuser when the mixture of gaseous fuel and air burns; the body of each mixing and distributing element being usually made of aluminised steel, which is much less resistant to thermal stresses.
  • the upper part of the burner body is provided with a flange which is clinched onto the perimeter of the diffuser, in order to fasten the diffuser to the burner body.
  • a flange which is clinched onto the perimeter of the diffuser, in order to fasten the diffuser to the burner body.
  • a further problem arising in the above described burners is the phenomenon of flame instability, which is caused by secondary air which penetrates in the non-pierced region of the diffuser between adjacent rows of slots, said secondary air being capable of causing an excessive cooling of the flame fronts, which results in flame instability.
  • a burner comprising at least one burner body fed with a mixture of gaseous fuel and air, said body being provided with a Venturi tube, arranged at the inside of the body, into which said mixture of gaseous fuel and air is introduced, a mixing and distributing chamber communicating with said Venturi tube being defined at the inside of said burner body, said mixing and distributing chamber communicating with a diffuser element provided with apertures through which said mixture is discharged from said burner body, said diffuser element being coupled to a flange provided in said burner body, characterised in that said diffuser element is provided with a peripheral rim so dimensioned as to be capable of being clinched onto said flange.
  • peripheral rim of the diffuser onto the flange of the burner body has both the advantage of shielding the flange protecting it from high temperatures and thermal stresses during operation of the burner and the advantage of guaranteeing tightness of the coupling between the diffuser and the burner body. This makes possible to increase considerably the life of the burner, without being obliged to use a material having a high resistance to thermal stresses for the burner body, and to prevent leakages of mixture which affect the performances of the burner.
  • shielding means is provided on the burner diffuser capable of limiting the inflow of secondary air in the flow of mixture discharged from the apertures provided on said diffuser.
  • the burner according to the invention comprises a burner body 1, of a so-called modular blade type, comprising a Venturi tube 2 arranged inside said body and provided with an inlet 10 through which a mixture of gaseous fuel and air is introduced.
  • the Venturi tube 2 at its end opposite to the inlet 10, opens into a mixing and distributing chamber 4, closed at its upper end by a diffuser 3 provided with apertures 7, for instance shaped as slots, through which said mixture of gaseous fuel and primary air is discharged before being burned.
  • the diffuser 3 is made of refractory steel.
  • the diffuser 3 is provided with a peripheral rim 6, which is clinched onto a flange 5 provided at the upper end of the body 1 for fixing the diffuser 3 to the body 1.
  • the width of the peripheral rim 6 of the diffuser 3 is conveniently greater than the with of the flange 5, in order to make possible for said rim to be clinched onto said flange 5.
  • the slots 7 are all aligned in a direction substantially perpendicular to a longitudinal axis A of the diffuser 3 and are arranged in groups 11 aligned in two staggered parallel rows.
  • Each group 11 comprises two sub-groups of slots 7 separated by an intermediate region of diffuser without slots.
  • Shielding means is provided at each end of each group 11 of slots 7, said shielding means being capable of preventing, or limiting, the inflow of secondary air into said intermediate region 8.
  • Said shielding means comprises further apertures 9, for instance shaped as further slots parallel to the slots 7 and having a length greater than the width of said intermediate region 8.
  • the length of the further slots 9 may be substantially equal to the whole length of each group 11, as shown in figure 4.
  • the flow of mixture discharged from said further slots 9 makes a barrier against the penetration of secondary air in the intermediate region 8, which makes possible to prevent an excessive cooling of the flame fronts and to improve the stability of the flame fronts.
  • Figure 5 shows a further embodiment of the present invention, in which the groups 11 of slots are arranged in a single row on the diffuser 3.
  • Figure 6 shows a still further embodiment of the invention, in which the groups 11 of slots 7 are arranged in a single row substantially without solution of continuity between a group of slots and a subsequent group of slots.
  • Figure 7 shows another embodiment of the present invention, in which the slots 7 are arranged in two parallel uninterrupted rows, separated by said intermediate region 8.
  • One of said further slots 9 is arranged at each end of the twin rows of slots 7.
  • Figure 8 shows a further embodiment of the invention, in which twin rows of slots are arranged on the diffuser 3, said rows being separated by an intermediate region 8 in which additional slots 12 are provided for the outflow of said mixture, said additional slots 12 being aligned in a direction substantially perpendicular to the direction of the slots 7.
  • One of said further slots 9 is arranged at each end of said twin rows of slots 7.
  • the additional slots 12 allows a flame front to be generated in said intermediate region 8, which improves considerably the stability of the flame fronts generated by the mixture flowing out of the slots 7.
  • Figure 9 shows a still further embodiment of the invention, which differs from the embodiment shown in Figure 8 because said further slots 9 are arranged not only at the ends of said twin rows of slots 7, but also at regular intervals along said twin rows of slots.
  • Figure 10 shows a further embodiment of the invention, in which groups 13 of slots are arranged in two staggered rows on the diffuser 3.
  • Each group 13 comprises two subgroups of slots 7 aligned in a direction substantially perpendicular to the longitudinal axis A of the diffuser, said sub-groups being separated by an intermediate region in which said additional slots 12, aligned in a direction substantially perpendicular to said slots 7, are arranged.
  • one of said further slots 9 is arranged at each end of each group.
  • FIGS 11 and 12 show an embodiment of said shielding means, which comprises two baffles 14 arranged substantially perpendicular to the surface of the diffuser 3.
  • Said baffles 14 may be made of metal, ceramic material, or in any material resistant to high operative temperatures of the burner.
  • said baffles 14 may replace the further slots 9 in all the embodiments of the present invention, previously described.
  • each burner body 1 may generate a thermal power up to about 3-4 kW, whilst traditional so-called modular blade burners may generate a maximum thermal power no higher than 1,5-2kw per burner body.
  • the burner bodies 1 according to the invention require a combustion chamber having substantially the same dimensions as a combustion chamber for traditional burners. This makes possible to install a less number of burner bodies 1, for a given thermal power, without altering the outer dimensions of the combustion chamber, which leads to a saving of installation costs and to a reduction of the time required for installing the burner bodies in the combustion chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)
  • Meat, Egg Or Seafood Products (AREA)
EP00103279A 1999-02-18 2000-02-17 Vormischbrenner Expired - Lifetime EP1030107B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1999MO000026A IT1310175B1 (it) 1999-02-18 1999-02-18 Bruciatore perfezionato
ITMO990026 1999-02-18

Publications (2)

Publication Number Publication Date
EP1030107A1 true EP1030107A1 (de) 2000-08-23
EP1030107B1 EP1030107B1 (de) 2004-04-28

Family

ID=11386860

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00103279A Expired - Lifetime EP1030107B1 (de) 1999-02-18 2000-02-17 Vormischbrenner

Country Status (3)

Country Link
EP (1) EP1030107B1 (de)
DE (1) DE60010151T2 (de)
IT (1) IT1310175B1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140011143A1 (en) * 2011-01-12 2014-01-09 Luca Barozzi High perimeter stability burner
ITMO20120281A1 (it) * 2012-11-19 2014-05-20 Worgas Bruciatori Srl Bruciatore atmosferico parzialmente premiscelato a combustibile gassoso.
US9134033B2 (en) * 2008-01-18 2015-09-15 Garland Commercial Industries L.L.C. Open loop gas burner
IT201700062155A1 (it) * 2017-06-07 2018-12-07 Worgas Bruciatori Srl Bruciatore
GB2616620A (en) * 2022-03-14 2023-09-20 Bosch Thermotechnology Ltd Uk A burner assembly for combustion of an air-hydrogen mixture

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2618137C1 (ru) * 2016-04-20 2017-05-02 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный архитектурно-строительный университет" (ФГБОУ ВПО "СПбГАСУ") Инжекционная горелка низкого давления
IT201800005589A1 (it) * 2018-05-22 2019-11-22 Bruciatore modulare

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3177923A (en) * 1961-11-27 1965-04-13 C A Olsen Mfg Co Gas burner
EP0373157A1 (de) 1987-08-03 1990-06-20 Worgas Bruciatori Srl VERBRENNUNGSVERFAHREN UND GASBRENNER MIT NIEDRIGER NOx-, CO-EMISSION.
WO1991005206A1 (en) * 1989-09-30 1991-04-18 Bray Burners Limited Gas burners
EP0537244A1 (de) 1990-07-06 1993-04-21 Worgas Bruciatori S.R.L. Verfahren und vorrichtung zur gasverbrennung
EP0695911A1 (de) 1994-07-08 1996-02-07 Worgas Bruciatori S.R.L. Gasbrenner mit einem verbesserten Diffusor
DE29614706U1 (de) * 1995-08-17 1996-10-02 Joh. Vaillant Gmbh U. Co, 42859 Remscheid Brenner
DE19724806A1 (de) * 1996-06-11 1997-12-18 Vaillant Joh Gmbh & Co Vollvormischender atmosphärischer Strahlungsbrenner
WO1998049495A1 (en) * 1997-04-28 1998-11-05 Worgas Bruciatori S.R.L. Burner for gaseous fuels

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3177923A (en) * 1961-11-27 1965-04-13 C A Olsen Mfg Co Gas burner
EP0373157A1 (de) 1987-08-03 1990-06-20 Worgas Bruciatori Srl VERBRENNUNGSVERFAHREN UND GASBRENNER MIT NIEDRIGER NOx-, CO-EMISSION.
WO1991005206A1 (en) * 1989-09-30 1991-04-18 Bray Burners Limited Gas burners
EP0537244A1 (de) 1990-07-06 1993-04-21 Worgas Bruciatori S.R.L. Verfahren und vorrichtung zur gasverbrennung
EP0695911A1 (de) 1994-07-08 1996-02-07 Worgas Bruciatori S.R.L. Gasbrenner mit einem verbesserten Diffusor
DE29614706U1 (de) * 1995-08-17 1996-10-02 Joh. Vaillant Gmbh U. Co, 42859 Remscheid Brenner
DE19724806A1 (de) * 1996-06-11 1997-12-18 Vaillant Joh Gmbh & Co Vollvormischender atmosphärischer Strahlungsbrenner
WO1998049495A1 (en) * 1997-04-28 1998-11-05 Worgas Bruciatori S.R.L. Burner for gaseous fuels

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9134033B2 (en) * 2008-01-18 2015-09-15 Garland Commercial Industries L.L.C. Open loop gas burner
US20140011143A1 (en) * 2011-01-12 2014-01-09 Luca Barozzi High perimeter stability burner
ITMO20120281A1 (it) * 2012-11-19 2014-05-20 Worgas Bruciatori Srl Bruciatore atmosferico parzialmente premiscelato a combustibile gassoso.
WO2014076675A1 (en) * 2012-11-19 2014-05-22 Worgas Bruciatori S.R.L. Atmospheric burner partially pre-mixed with gaseous fuel
IT201700062155A1 (it) * 2017-06-07 2018-12-07 Worgas Bruciatori Srl Bruciatore
EP3412967A1 (de) * 2017-06-07 2018-12-12 Worgas Bruciatori S.R.L. Brenner
GB2616620A (en) * 2022-03-14 2023-09-20 Bosch Thermotechnology Ltd Uk A burner assembly for combustion of an air-hydrogen mixture

Also Published As

Publication number Publication date
IT1310175B1 (it) 2002-02-11
EP1030107B1 (de) 2004-04-28
DE60010151T2 (de) 2005-01-27
ITMO990026A1 (it) 2000-08-18
ITMO990026A0 (it) 1999-02-18
DE60010151D1 (de) 2004-06-03

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