EP2643634A1 - Brûleur à stabilité élevée - Google Patents

Brûleur à stabilité élevée

Info

Publication number
EP2643634A1
EP2643634A1 EP11811373.7A EP11811373A EP2643634A1 EP 2643634 A1 EP2643634 A1 EP 2643634A1 EP 11811373 A EP11811373 A EP 11811373A EP 2643634 A1 EP2643634 A1 EP 2643634A1
Authority
EP
European Patent Office
Prior art keywords
burner
distributor
diffuser
openings
diffusion
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.)
Withdrawn
Application number
EP11811373.7A
Other languages
German (de)
English (en)
Inventor
Antonio Acocella
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 EP2643634A1 publication Critical patent/EP2643634A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F23D14/46—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
    • 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
    • F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
    • F23D14/74—Preventing flame lift-off
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/102—Flame diffusing means using perforated plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/103—Flame diffusing means using screens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/106—Assemblies of different layers
    • 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
    • F23D2212/00—Burner material specifications
    • F23D2212/10—Burner material specifications ceramic
    • F23D2212/103—Fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/20—Burner material specifications metallic
    • F23D2212/201—Fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2900/00—Special features of, or arrangements for burners using fluid fuels or solid fuels suspended in a carrier gas
    • F23D2900/00003—Fuel or fuel-air mixtures flow distribution devices upstream of the outlet

Definitions

  • the present invention relates to a high-stability burner. Particularly, the present invention relates to a high-stability burner for gas boilers.
  • Prior art gas boiler comprise: a duct for feeding a burner with a pre-mixed gas-air mixture, a burner for the production of heat by means of combustion of said mixture in a combustion chamber, and optionally a support element that can be connected to the heat exchanger and/or feed conduct in order to ensure the locking of the combustion chamber and/or for the positioning of the burner relative to this combustion chamber .
  • the burner further comprises a diffuser for the pre-mixed gas of fuel and air to be conveyed therethrough and which defines a flame pattern for producing heat.
  • the diffuser usually comprises a wall provided with a plurality of openings and having an inner surface fluidically connected to the feed duct, and accordingly in contact with the unburnt mixture, and an outer surface on which the burning is carried out. These surfaces are designated herein as the feed surface and burning surface .
  • a distribution device, or distributor Upstream of the diffuser (with reference to the flow direction of the gas-air mixture) a distribution device, or distributor, can be further provided.
  • the distributor usually comprises a wall provided with a plurality of openings, configured such as to distribute the gas-air mixture in a substantially uniform manner, or in any case as desired, towards the diffuser wall.
  • the diffuser openings and the distributor openings are positioned at portions which, in the operating position, result to be matching to each other. In most cases, these portions are central portions of the distributor and diffuser.
  • the heat produced by the combustion of the combustion surface is carried by means of the hot combustion gases to a heat exchanger for heating a fluid, for example water, which is subsequently conveyed to utility equipment, for example a heating system for an industrial process, of dwelling environments or the like and/or sanitary water .
  • the heating power of the burner can be piloted by changing the flow rate of the fuel or mixture fed to the diffuser.
  • the amplitude of the heating power range, i.e. the so-called modulation (ratio of minimum power to maximum power) of prior art burners is limited. This is due to the fact that, when the mixture flow rate is not comprised within an optimum range which depends on the material, the specific passage area (ratio of the passage area to the wall area) and on the diffuser flow resistance, flame instability problems occur, which prevent the proper operation of the burner.
  • the object of the present invention is thus to provide a high- stability burner which allows a high power modulation while overcoming said problems of flame blow-off and the consequent polluting emission.
  • a burner for gas boiler comprising:
  • a diffuser suitable to diffuse pre-mixed combustion gases into a combustion chamber, comprising a wall provided with a plurality of diffusion openings;
  • a distributor suitable to distribute the combustion gases on the diffuser, comprising a wall provided with a plurality of distribution openings;
  • the diffusion openings are positioned at a diffuser portion and the distribution openings are positioned at a distribution portion, said portions being configured such that, in the operating position, the distribution openings result to be alternated with the diffusion openings relative to the mixture flow direction.
  • each straight line parallel to the mixture flow direction i.e. substantially orthogonal to the burner, univocally intersects a distribution opening or a diffusion opening.
  • each straight line substantially orthogonal to the burner only intersects the distributor portion in which the distribution openings are provided or the diffuser portion in which the diffusion openings are provided.
  • This burner achieves, with the diffuser surface being the same, an increase in the burner maximum work power, without being affected by flame blow-off problems. Accordingly, it achieves an increase in the maximum power per surface unit of the diffuser (maximum specific power) . This implies an increase in the modulation range.
  • the burner of the invention further obtains, with the power being the same, a reduction in the diffuser surface and accordingly a reduction in the costs, in addition to an increase in the maximum specific power.
  • the reduction in the diffuser surface implies a reduction in the burner volume with obvious advantages in terms of manufacturing and transport of the latter.
  • the flame stability that can be obtained with the burner of the invention results in reduced emissions of CO, because a flame less blown- off from the burner is less polluting.
  • openings herein means through openings .
  • said diffuser portion in which the diffusion openings are positioned corresponds to a central portion of the diffuser and said distributor portions in which the distribution openings are positioned corresponds to a peripheral portion of the distributor .
  • - Fig. 1 is a longitudinal sectional view of a boiler portion comprising a high- stability burner according to the present invention
  • - Fig. 2 is a longitudinal sectional view of a high stability burner according to a first embodiment of the invention
  • - Fig. 3 is a longitudinal sectional view of a burner for a gas boiler according to the prior art
  • FIG. 4 is a longitudinal sectional view of a high stability burner according to a second embodiment of the invention.
  • a high stability burner for a gas boiler is generally designated with numeral reference 1.
  • the reference 1 designates a burner that produces heat by means of the combustion of a pre-mixed fuel gas, generally comprising fuel gas and air.
  • a pre-mixed fuel gas generally comprising fuel gas and air.
  • these combustion gases are completely pre-mixed, i.e. no further component is added to the mixture delivered to the burner.
  • the burner 1 comprises a diffuser 2, which is suitable to diffuse combustion gases into a combustion chamber 3 (indicated with a dotted line in Fig. 1) .
  • the burner 1 is mounted to a frame 9.
  • the latter can be connected to the combustion chamber 3 by means of connecting portions.
  • the frame 9 further defines an opening for the mixture of fuel and air to pass therethrough.
  • the diffuser 2 includes a wall provided with a plurality of diffusion openings 5.
  • the inner surface of this wall is fluidically connected with the gas feeding duct and is accordingly called the feeding surface.
  • the outer surface of this wall i.e. the surface on which the combustion is carried out, is called the combustion surface.
  • the burner 1 also comprises a distributor 4, suitable to distribute the mixture to the diffuser 2, which is arranged upstream of the diffuser 2, with reference to the mixture flow direction 7.
  • the distributor 4 comprises a wall provided with a plurality of distribution openings 6.
  • the diffusion openings 5 are positioned at a diffuser portion 2 and the distribution openings 6 are positioned at a distribution portion 4. These portions are configured such that, in the operating position, the distribution openings 6 result to be alternated with the diffusion openings 5 relative to the mixture flow direction 7.
  • the mixture flow direction 7 as outlined in Fig. 1-4 with arrows with which the numeral 7 is associated, is substantially orthogonal to the burner 1.
  • the distribution openings 6 correspond to the diffusion openings 5 and accordingly a straight line parallel to the mixture 7 flow direction that crosses the former also crosses the latter, in the burner 1 of the present invention, a straight line parallel to the mixture 7 flow direction only crosses the distribution openings 6 or the diffusion openings 5.
  • a straight line parallel to the mixture flow direction 7 only crosses the diffuser portion 2 in which the diffusion openings 5 are provided or the distributor portion 4 in which the distribution openings 6 are provided. This line, accordingly, does not cross both the diffuser portion 2 in which the diffusion openings 5 are provided and the distributor portion 4 in which the distribution openings 6 are provided, as it happens in the prior art.
  • the distributor openings 4 are provided, the diffuser openings 2 are not provided, and vice versa.
  • said portion of diffuser 2 in which the diffusion openings 5 corresponds to a central portion of the diffuser 2 and said portion of distributor 4 in which the distribution openings 6 are positioned corresponds to a peripheral portion of the distributor 4.
  • the burner 1 is of a flat type, particularly rectangular, and said peripheral portion of the distributor 4, in which the distribution openings 6 are positioned, comprises a perimeter portion of the distributor 4, i.e. it extends at the four perimeter edges of the distributor 4.
  • the burner 1 is of a three-dimensional type, particularly cylindrical, and said peripheral portion of the distributor 4, having the distribution openings 6, comprises a portion extending at the upper edge and a portion at the lower edge of the distributor 4.
  • this peripheral portion having the distribution openings 6 comprises a portion at only one of said upper and lower edges.
  • a heat exchanger 8 is schematically illustrated in contact with the combustion chamber 3, which is suitable to receive the heat produced from the combustion on the combustion surface of the diffuser 2.
  • the diffuser 2 is preferably made from a compact material having said diffusion openings 5.
  • It can comprise, at the portions having the diffusion openings 5, a net or a yarn- or fiber-woven wire- or ceramic mesh or a metal or ceramic sintered material .
  • the distributor 4 comprises a plate which can be pierced or micro-stretched at those portions having the distribution openings 6.
  • it can comprise, at the portions having the distribution openings 6, a wire net or a porous material .
  • the burner 1 could be an inner combustion hollow burner, such that described in the US patent application 12/213, 078 in the name of the same Applicant.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)

Abstract

L'invention concerne un brûleur (1) destiné à une chaudière à gaz comprenant : - un diffuseur (2), approprié pour diffuser des gaz de combustion prémélangés dans une chambre de combustion (3), comprenant une paroi pourvue d'une pluralité d'ouvertures de diffusion (5) ; et - un distributeur (4), approprié pour distribuer les gaz de combustion sur le diffuseur (2), comprenant une paroi pourvue d'une pluralité d'ouvertures de distribution (6) ; les ouvertures de diffusion (5) étant positionnées au niveau d'une partie de diffuseur (2) et les ouvertures de distribution (6) étant positionnées au niveau d'une partie du distributeur (4), lesdites parties étant conçues de telle sorte que, dans la position de fonctionnement, les ouvertures de distribution (6) sont par conséquent alternées par rapport aux ouvertures de diffusion (5) par rapport à la direction d'écoulement du mélange (7).
EP11811373.7A 2010-11-24 2011-11-18 Brûleur à stabilité élevée Withdrawn EP2643634A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2010A002181A IT1402900B1 (it) 2010-11-24 2010-11-24 Bruciatore ad elevata stabilita'
PCT/IB2011/055177 WO2012069970A1 (fr) 2010-11-24 2011-11-18 Brûleur à stabilité élevée

Publications (1)

Publication Number Publication Date
EP2643634A1 true EP2643634A1 (fr) 2013-10-02

Family

ID=43742794

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11811373.7A Withdrawn EP2643634A1 (fr) 2010-11-24 2011-11-18 Brûleur à stabilité élevée

Country Status (5)

Country Link
US (1) US20130302741A1 (fr)
EP (1) EP2643634A1 (fr)
CN (1) CN103299130B (fr)
IT (1) IT1402900B1 (fr)
WO (1) WO2012069970A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5529126B2 (ja) * 2008-07-08 2014-06-25 ナムローゼ・フェンノートシャップ・ベーカート・ソシエテ・アノニム 改良された放射バーナー
BE1021179B1 (nl) * 2015-02-20 2016-03-24 Metalfire Nv Gashaard met een brander
CN109716023B (zh) * 2016-09-13 2021-06-18 贝卡尔特燃烧技术股份有限公司 预混气体燃烧器
GB2599898A (en) * 2020-10-07 2022-04-20 Edwards Ltd Burner Liner

Family Cites Families (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2494243A (en) * 1944-07-31 1950-01-10 Louis D Houlis Pressure ribbon-type gas burner
DE1529197B1 (de) * 1966-04-06 1970-04-30 Kurt Krieger Strahlungsbrenner
US3472601A (en) * 1967-12-12 1969-10-14 Sango Toki Radiant gas burner element
US3488137A (en) * 1968-10-17 1970-01-06 Hikaru Naganuma Infrared gas burner with flashback prevention arrangement
DE1955163A1 (de) * 1969-06-14 1971-05-13 Schwank Gmbh Mit Gas oder fluessigem Brennstoff betriebener Infrarotstrahler
US3695818A (en) * 1969-10-31 1972-10-03 Rinnai Kk Radiant burner
US3736095A (en) * 1971-03-08 1973-05-29 Fuel Equipment Co Gas-fired blast type burner
US3715183A (en) * 1971-06-15 1973-02-06 Manifold & Phalor Machine Co Gas burner especially useful for glazing glassware
US3852025A (en) * 1973-09-28 1974-12-03 Int Magna Corp Infra-red heater
EP0009831B1 (fr) * 1978-07-28 1984-01-18 Aldo Polidoro Brûleur atmosphérique à gaz avec des groupes de fentes de passage du mélange gaz combustible-air comburant
US4657506A (en) * 1984-12-10 1987-04-14 Glowcore Corporation Gas burner
DE3868815D1 (de) * 1987-09-26 1992-04-09 Ruhrgas Ag Gasbrenner.
CA2005415C (fr) * 1989-01-10 1994-03-01 Willie H. Best Bruleur a gaz a rendement eleve
US5240411A (en) * 1992-02-10 1993-08-31 Mor-Flo Industries, Inc. Atmospheric gas burner assembly
US5439372A (en) * 1993-06-28 1995-08-08 Alzeta Corporation Multiple firing rate zone burner and method
EP0698766B1 (fr) * 1994-08-26 1998-07-22 Caradon Ideal Limited Brûleur à gaz
US5520536A (en) * 1995-05-05 1996-05-28 Burner Systems International, Inc. Premixed gas burner
US6199364B1 (en) * 1999-01-22 2001-03-13 Alzeta Corporation Burner and process for operating gas turbines with minimal NOx emissions
FR2792394B1 (fr) * 1999-04-16 2001-07-27 Gaz De France Procede pour realiser une surface d'accrochage de flammes
US6409500B2 (en) * 1999-08-30 2002-06-25 Mark T. Georgantas Glass fire and method of making
US7052273B2 (en) * 2003-01-27 2006-05-30 Millomat Stampings Inc. Premixed fuel burner assembly
GB2404008A (en) * 2003-07-16 2005-01-19 Aeromatix Ltd A burner including a ceramic burner head and an associated baffle
ITPN20070009A1 (it) * 2007-02-08 2008-08-09 Electrolux Professional Spa "forno di cottura con bruciatore pre-miscelato per caldaie"
ITMO20070167A1 (it) * 2007-05-21 2008-11-22 Worgas Bruciatori Srl Bruciatore modulante
EP2315971A1 (fr) * 2008-06-13 2011-05-04 Worgas Inc. Procédé et appareil de stabilisation de flamme de gaz
CN101514816B (zh) * 2009-04-05 2010-09-01 张英华 红外线燃烧器
DE102010051415B4 (de) * 2010-11-16 2012-12-27 Ulrich Dreizler Verdrängungsverfahren bei der Herstellung einer Brennergewebemembrane für eine kühle Flammenwurzel
ITMI20110390A1 (it) * 2011-03-11 2012-09-12 Bertelli & Partners Srl Bruciatore a gas perfezionato per combustione premiscelata

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012069970A1 *

Also Published As

Publication number Publication date
WO2012069970A1 (fr) 2012-05-31
US20130302741A1 (en) 2013-11-14
ITMI20102181A1 (it) 2012-05-25
IT1402900B1 (it) 2013-09-27
CN103299130A (zh) 2013-09-11
CN103299130B (zh) 2015-12-02

Similar Documents

Publication Publication Date Title
EP2663807B1 (fr) Brûleur à gaz à stabilité périphérique élevée
US9885476B2 (en) Surface combustion gas burner
EP2713105B1 (fr) Brûleur à prémélange équipe d'une tête de combustion à gaz
WO2009077505A2 (fr) Nouveau brûleur à prémélange
CA2826780A1 (fr) Rechauffeur de tube infrarouge
US20130302741A1 (en) High-stability burners
JP2004144468A (ja) 多段制御を具現するガス燃焼バーナ
EP2805111B1 (fr) Brûleur cylindrique à prémélange gazeux
CN102588967A (zh) 部分预混燃烧器
JP3814603B2 (ja) 分離された炎孔部を有する予混合ガス燃焼バーナ
EP3586060A1 (fr) Ensemble brûleur
EP3126737B1 (fr) Brûleur à pré-mélange refroidi par un mélange air-gaz
EP2385301A1 (fr) Brûleur à gaz pour chaudière
KR100420002B1 (ko) 예혼합 메탈화이버 버너
KR100864846B1 (ko) 예혼합 연소 버너
US4078587A (en) Non-premix gas burner orifice
US20210317985A1 (en) Trapezoidal air distribution baffle
KR101291627B1 (ko) 예혼합가스버너의 염공부 구조
EP3584499B1 (fr) Diffuseur de flamme ainsi que brûleur et chauffe-eau utilisant celui-ci
KR100314282B1 (ko) 다공성인 금속섬유직조 조직의 다공체판을 이용한 가정용 저공해·고효율 리치·린 연소 가스버너
EP4163544A1 (fr) Pont de brûleur et procédé de production d'un tel pont de brûleur
JP3447252B2 (ja) 触媒燃焼装置
JP3095762U (ja) リッチ・リーン燃焼ガスバーナーを利用した低公害・高効率家庭用ガスボイラー
CN114646052A (zh) 用于小型燃气锅炉的燃烧系统
CN116734246A (zh) 一种全预混燃烧装置

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

17P Request for examination filed

Effective date: 20130522

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

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20170601