WO2007022772A1 - Ensemble de brûleurs comprenant une pluralité d’unités de gicleurs - Google Patents

Ensemble de brûleurs comprenant une pluralité d’unités de gicleurs Download PDF

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Publication number
WO2007022772A1
WO2007022772A1 PCT/DK2005/000535 DK2005000535W WO2007022772A1 WO 2007022772 A1 WO2007022772 A1 WO 2007022772A1 DK 2005000535 W DK2005000535 W DK 2005000535W WO 2007022772 A1 WO2007022772 A1 WO 2007022772A1
Authority
WO
WIPO (PCT)
Prior art keywords
burner
burner assembly
nozzle
supply means
profile section
Prior art date
Application number
PCT/DK2005/000535
Other languages
English (en)
Inventor
Bent Kjeldal
Ove Steen Boe
Original Assignee
Danfoss A/S
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 Danfoss A/S filed Critical Danfoss A/S
Priority to PCT/DK2005/000535 priority Critical patent/WO2007022772A1/fr
Publication of WO2007022772A1 publication Critical patent/WO2007022772A1/fr

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
    • F23D14/46—Details, e.g. noise reduction means
    • F23D14/62—Mixing devices; Mixing tubes
    • F23D14/64—Mixing devices; Mixing tubes with injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/101—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet
    • F23D11/102—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber
    • 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
    • F23D14/045—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 a plurality of burner bars assembled together, e.g. in a grid-like arrangement
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2213/00—Burner manufacture specifications
    • 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
    • F23D2900/14—Special features of gas burners
    • F23D2900/14641—Special features of gas burners with gas distribution manifolds or bars provided with a plurality of nozzles

Definitions

  • a burner assembly comprising a plurality of burner nozzle units.
  • the present invention relates to a burner assembly comprising a plurality of burner nozzle units with nozzles and a supply means for supplying the burner nozzles with a fluid.
  • Ordinary supply means for nozzles e.g. water spray nozzles, burner nozzles etc.
  • nozzles e.g. water spray nozzles, burner nozzles etc.
  • common, flexible hoses or tubes These are relatively cheap, but labour intensive to install, especially in the event of a plurality of nozzles and/or a plurality of fluids supplied to the nozzle.
  • metal pipes are often used, but they are more expensive, and as metal pipes are rigid, they •require more labour for adjustment and installation.
  • US patent no. 2,497,476 discloses a gaseous fuel burner comprising a manifold for supply- ing gaseous fuel and air or oxygen to the burner.
  • the manifold is part of the supply means for the burner, which is made up of blocks bolted together and having built-in conduits for gas and air. In this way a num- ber of burners can be supplied with fuel and air for the combustion process.
  • This manifold also requires substantial machining.
  • EP 0 727 612 Bl discloses a composite burner comprising a fuel supply conduit and an air supply conduit connected to a manifold for the burner comprising a plurality of burner bowls.
  • Swirl chamber, mixing channel and burner bowl may be formed by cutouts in a single block of suitable refractory mate- rial.
  • Each burner is provided with separate supply lines for fuel and oxidizing gas (air) , which supply lines may be formed as e.g. drilled channels and conduits in plates assembled to a block.
  • This composite burner also requires substantial machining and high material consumption.
  • the object of the invention is to provide a burner assembly of relatively simple configuration and comprising few parts.
  • the supply means comprises a hollow first profile section forming a first conduit for the fluid, the first profile section having a plurality of first apertures adapted for engagement with said burner nozzle units. Hollow sections can be made cheaply, and a further advantage is that the supply means also act as a holder for the nozzle unit, so the assembly requires few parts.
  • the supply means may comprise only one conduit .
  • the nozzles of the burner assembly need more than one fluid, and in that event it may be ad- vantageous that the supply means further comprises a hollow second profile section adjacent the first profile section to provide a second conduit for a second fluid, the second profile section comprising a plu- rality of second apertures receiving the plurality of burner nozzle units for the burner nozzle units to traverse the second conduit and penetrate into the first apertures.
  • the first and second hollow sections may be two separate parts, but according to an embodiment the first and second hollow sections are integral, whereby is achieved that only one part need to be stored and no assembly of different sections is needed.
  • integral should be understood that the two elements are either made in one piece or separately manufactured elements joined to constitute an interconnected unit by bonding, welding or the like.
  • the supply means may further comprise a hollow third profile section adjacent the second profile section to provide a third conduit for a third fluid, the third profile section comprising a plurality of third aper- tures for receiving the plurality of burner nozzle units for the burner nozzle units to traverse the third conduit and penetrate into the second apertures .
  • the third hollow section is integral with the first and second hollow profile sections, whereby a very simple three-compartment supply line is achieved.
  • the first, second and third profile sections are manufactured by extrusion.
  • first, second and third hollow profile sections are made of aluminium or an aluminium alloy.
  • the supply means comprises a sealing means at one end to efficiently seal the end of the hollow section.
  • the supply means may be connected to one or more feed lines in any known way, but according to an embodiment the supply means comprises a connector comprising inlets and being adapted to cooperate with at least one feed line.
  • At least one of the conduits are provided with a heating device between the inlet and the plurality of apertures for heating fluid flowing from the inlet to the burner nozzle units.
  • a heating device may for example be used for heating oil to an oil burner. With the aid of the heating device a constant temperature of the oil can be achieved, whereby constant physical properties of the oil, such as viscosity, can be achieved independently of the ambient temperature and the temperature of the oil in the oil reservoir, so the burner will always function with optimum efficiency.
  • the nozzle unit may be a simple nozzle bowl, however according to an embodiment the nozzle unit comprises a nozzle and a nozzle holder, thereby achieving a simple but efficient nozzle unit, where a nozzle can easily be replaced if it is defective, e.g. because of clogging, or if a different nozzle is needed, e.g. because the heat demand from the burner assembly has changed.
  • the nozzle holder is mounted on the first profile section, i.e. in a way that the nozzle holder does not project into the first conduit .
  • the nozzle holder is mounted into at least one of the conduits, i.e. in a way that the nozzle holder projects into one of the conduits.
  • the nozzle holders may be secured by the profile and individually spaced thereby.
  • An embodiment of the invention relates to a do- mestic type liquid fuel burner unit having a burner assembly as stated above, said burner assembly being arranged to heat a heat exchanger with a heating surface arranged to heat a heat carrying medium in a reservoir.
  • the burner assembly of the burner unit may be arranged below the heat exchanger, whereby a particularly compact burner unit may be achieved.
  • the efficiency of the burner unit according to this embodiment is better than the common burner unit in which the burner assembly is arranged verti- cal at a side wall of the heat exchanger, as the heat generated by the burner assembly will be lead directly to the heat exchanger by convection.
  • the burner unit is adapted for mounting on a wall, which may be practical and space- saving, as the floor space may be used for other appliances .
  • the burner unit may be arranged at a distance (D) from the heat exchanger, said distance (D) being in the interval of 10 to 50 cm measured from the noz- zle tip to the heat exchanger, whereby a very compact and versatile burner unit is achieved.
  • a distance of less than 10 cm will normally be too little because of severe thermal loading on the heat exchanger, ex- cept for burner units with very small output.
  • a distance of more than 50 cm will normally be too much because of the increase in overall size of the burner unit, and possibly a reduction in efficiency.
  • a dis- tance of 15 to 20 cm will provide good results for most domestic type burner units.
  • the burner unit may be supplying a constant output, which may suffice in some cases, but according to an embodiment, the burner unit is adapted for providing a variable output to at least partly cover the range of 1 kW to 60 kW.
  • the burner unit may be adapted to provide a variable output in various ways, such as by cutting out some of the nozzles or by regulating the output of the nozzles by adjusting the supply of fuel to the burner assembly. Alternatively or supplementary the output may be adjusted by intermittent or pulsed service.
  • Fig. 1 is a plan view of a supply means according to the invention
  • Fig. 2 is a longitudinal section along line II- II in Fig. 1,
  • Fig. 3 is a cross-section along the line III- III in Fig. 1,
  • Fig. 4 is a longitudinal section of a burner assembly comprising the supply means of Figs. 1-3
  • Fig. 5 is a cross-section along line V-V in Fig. 4,
  • Fig. 6 is a longitudinal section of a burner assembly comprising an alternative supply means
  • Fig. 7 is a cross-section along line VII-VII in Fig. 6,
  • Fig. 8 is an end view of a connector for the supply means
  • Fig. 9 is a cross-section along line IX-IX in Fig. 8,
  • Fig. 10 is an end view of an end plug for a supply means
  • Fig. 11 is a side view of the end plug in Fig. 10,
  • Fig. 12 is a sectional view similar to Fig. 4 of a burner assembly provided with a heating device
  • Fig. 12a is an enlarged detail of Fig. 12, and
  • Fig. 13 is a sketch of a burner unit comprising a burner assembly.
  • the supply means 1 shown in Figs. 1-3 is a profile comprising three hollow profile sections 2, 3, 4, respectively, (see Figs. 2 and 3), which form separate first, second and third conduits 5, 6, 7, respectively, in the longitudinal direction of the profile.
  • the profile is made by extrusion in virtually endless length, and subsequently cut to desired length.
  • the upper walls of the respective conduits 5, 6, 7 are provided with first, second and third apertures 8, 9, 10, respectively, at desired locations, which apertures 8, 9, 10 conveniently can be made by drilling with a stepped drill, whereby all three apertures can be provided in one process .
  • a nozzle unit 41 may be inserted into the apertures 8, 9, 10 of the profile, whereby the profile will function as a holder for the nozzle unit as well as a supply means.
  • a nozzle holder 11 is inserted into the apertures 8, 9, 10 in the profile.
  • a nozzle 12 is inserted into one of the nozzle holders 11 to form a nozzle unit 41, and preferably the nozzle 12 is releasably connected to the nozzle holder 11 by threading, a bayonet coupling or the like.
  • nozzles 12 should also be fitted in the other nozzle holders to make up an operative burner device 40.
  • This assembly of nozzles 12 and supply means 1 is particularly applicable to burner devices, such as an atomizing oil burner, and in this case the first conduit 5 will supply the nozzle unit with oil, the second conduit 6 will supply the nozzle unit with an atomizing gas, such as air, and the third conduit 7 will supply the nozzle unit with combustion air around the nozzle.
  • the burner device in Fig. 4 and 5 comprises a top plate 13 holding the upper end of the nozzle holders 11, as these are inserted in a hole in the top plate 13.
  • the top plate 13, which may be connected to the profile, is provided with auxiliary holes 14 arranged around the nozzle 12 and through which the combustion air supplied through the third conduit 7 will flow.
  • the burner device may comprise a flame holder 15 as shown, which should be connected to the top plate 13 and if desired also the profile.
  • the flame holder 15 is a plate with a substantial thickness and provided with a nozzle hole 16 to at least partially surround the nozzle 12, which is recessed in the flame holder 15, to thereby shield the individual nozzle units from each other and provide a stable flame by directing the flow of combustion air coaxially to the nozzle 12.
  • the top plate 13 and the flame holder 15 should be made from a refractory material, and in some cases it may be advantageous that the material is also thermally insulating to shield the supply means 1 from the heat of the burner.
  • the nozzle holder 11 is inserted in the profile to communicate with the conduit 5 through an opening 17 and with the conduit 6 through secondary openings 18.
  • the nozzle 12 inserted into the nozzle holder 11 comprises a hollow stem 19 projecting into the open- ing 17 and comprising an external sealing 21 to seal the stem 19 in the opening 17 to avoid the fluid of conduit 5 to enter conduit 6.
  • Figs . 6 and 7 show an alternative embodiment in which the supply means 1 is made up of separate hol- low profile sections 2, 3, 4, respectively, but otherwise there is no substantial difference to the previous embodiment.
  • the first, second and third hollow profile sections 2, 3, 4, respectively, containing the conduits for the fluids to make up the nozzle unit 41 is placed on top of each other, if necessary or advantageous with a sealing 20 to seal the joint between two adjacent hollow sections at the hole for the nozzle unit, e.g. between the first and second profile sections as shown.
  • Fig. 7 shows how two supply means 1 can be placed side by side to provide a burner device with a battery of nozzle units 41. In the example shown in Fig.
  • the burner battery comprises two supply means each comprising three hollow sections 2, 3, 4, and 2', 3', 4', respectively. As can be seen the two rows of nozzles may share a com- mon top plate 13 and a common flame holder 15.
  • the burner battery may further comprise means for supplying the fluids from the hollow sections 2, 3, 4, to the hollow sections 2 ' , 3 ' , 4 ' , or the two rows may S be supplied with the fluids independently.
  • the separate hollow sections 2, 3, 4 can of course also be made by extrusion, and be assembled to make up a profile. Separate hollow sections would be easier to manufacture by extrusion than the integral 0 profile, but handling and assembling the separate parts would raise the overall cost of the supply
  • the stem 19 of the nozzle 12 and/or the nozzle holder 11 may be made from a material having low heat 5 conductivity to hinder heat conduction from the nozzle into the profile.
  • a material having a low heat resistance for at least the hollow section 2 being most remote from the nozzle.
  • the hollow section 2 for in- 0 stance could be made from plastics, thereby further lowering the cost of the supply means .
  • the hollow sections are made by extrusion, hence they are open ended.
  • a connector 22 having one side adapted 5 for insertion into the hollow sections in that this side comprises male parts 23, 24, 25 for insertion into the hollow sections 4, 3 and 2, respectively.
  • the connector further comprises a shoulder 26 for abutment against the end of- the hollow sections.
  • the connector comprises pipe connections 27, 28, 29, to which pipes supplying the various fluids can be connected.
  • the profile may be equipped with an end plug to seal this end off.
  • An example of such an end plug 30 can be seen in Fig. 10 and 11.
  • the end plug 30 is provided with male parts 31, 32, 33 for insertion into the hollow sections 4, 3, 2, respectively, and the end plug is further provided with a shoulder 34 for abutment against the end of the hollow sections.
  • the end plug 30 may be provided with additional sealing means, e.g. a gasket, liquid sealing or a strong adhesive.
  • the supply means may be provided with a built-in heating device as illustrated in Fig. 12 and Fig. 12a.
  • the burner assembly 40 is provided with a preheater 36 in the hollow section 2 distributing the fuel to the nozzles.
  • the illustrated preheater 36 is of electrical type, and connected to a power supply by electrical wires 37.
  • the preheater may for example be useful with oil as fuel, as the preheater maintain a constant temperature of the fuel, and hence a constant viscosity, whereby the efficiency of the burner can be held at an optimum independently of the temperature of the fuel in the fuel storage tank.
  • Fig. 13 is a sketch of a burner unit 100 com- prising a burner assembly 40 as outlined above.
  • the burner unit 100 further comprises a heat exchanger 102 with a heating surface 103 to heat a heat carrying medium in a reservoir 105, such as a boiler for hot water in a domestic type central heating unit.
  • the burner assembly 40 is arranged vertically below the heat exchanger 102, whereby the heat produced by the flames 106 of the nozzle units 41 is directed directly to the heat exchanger 102.
  • the burner assembly 40 is arranged at a distance D from the heat exchanger, where D is as small as possible, preferably in the interval of 10 to 50 cm.
  • the supply means need not supply all the necessary fluids for the nozzle. In some cases it may be desirable to supply e.g. oil or another fuel through separate pipes or conduits for each nozzle, whereas it may be desirable to supply e.g. the atomizing gas through a hollow section according to the invention, or vice versa. In any event, the hollow section may act as a holder or spacer for the nozzles, even when not all fluids are delivered by one or more hollow sections. It will also be evident to the skilled person that an embodiment in which the separate nozzle holders 11 are dispensed with is also a possibility. In this case, the supply means could be adapted for holding the nozzles 12.
  • supply means could be further extended to provide conduits for supplemen- tary fluids.

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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)

Abstract

Ensemble de brûleurs (40) comprenant une pluralité d’unités de gicleurs (41) avec des gicleurs (12) et un moyen d’alimentation destiné à alimenter les gicleurs (12) en fluide. L’invention vise un ensemble de brûleurs de configuration relativement simple et comprenant peu de pièces. Le moyen d’alimentation comprend une première section de profil creuse qui constitue un premier conduit (5) pour le fluide, ladite première section de profil ayant une pluralité de premières ouvertures adaptées pour venir en prise avec lesdites unités de gicleurs.
PCT/DK2005/000535 2005-08-22 2005-08-22 Ensemble de brûleurs comprenant une pluralité d’unités de gicleurs WO2007022772A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/DK2005/000535 WO2007022772A1 (fr) 2005-08-22 2005-08-22 Ensemble de brûleurs comprenant une pluralité d’unités de gicleurs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/DK2005/000535 WO2007022772A1 (fr) 2005-08-22 2005-08-22 Ensemble de brûleurs comprenant une pluralité d’unités de gicleurs

Publications (1)

Publication Number Publication Date
WO2007022772A1 true WO2007022772A1 (fr) 2007-03-01

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Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2194321A2 (fr) * 2008-12-05 2010-06-09 Boo-Sung Hwang Brûleur à combustion d'hydrogène-oxygène
WO2016134061A1 (fr) * 2015-02-17 2016-08-25 Clearsign Combustion Corporation Stabilisateur de flamme perforé à buse de carburant réglable

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1639115A (en) * 1924-07-10 1927-08-16 Gas Res Co Stove
DE4214693A1 (de) * 1992-05-02 1993-11-04 Koerting Ag Gasheizkessel
DE19629966A1 (de) * 1996-07-25 1998-01-29 Ruhrgas Ag Verfahren zur Regelung des Primärluftanteils eines atmosphärischen Gasbrenners und Vorrichtung zur Durchfühurng des Verfahrens
DE19758557A1 (de) * 1997-11-26 1999-07-22 Webasto Thermosysteme Gmbh Niederdruckzerstäubungsvorrichtung mit mehreren benachbarten Zweistoffdüsen
US6027336A (en) * 1997-06-12 2000-02-22 Stiebel Eltron Gmbh & Co. Kg Gas burner for a heating furnace
US6261089B1 (en) * 1999-11-15 2001-07-17 Industrie Polidoro A. Spa Fuel gas burner with low NOx content emissions
US20050181321A1 (en) * 2004-02-06 2005-08-18 Sit-Bray Limited Air/gas burner system
FR2867260A1 (fr) * 2004-03-02 2005-09-09 Solaronics Irt Dispositif pour raccorder un element radiant chauffe au gaz

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1639115A (en) * 1924-07-10 1927-08-16 Gas Res Co Stove
DE4214693A1 (de) * 1992-05-02 1993-11-04 Koerting Ag Gasheizkessel
DE19629966A1 (de) * 1996-07-25 1998-01-29 Ruhrgas Ag Verfahren zur Regelung des Primärluftanteils eines atmosphärischen Gasbrenners und Vorrichtung zur Durchfühurng des Verfahrens
US6027336A (en) * 1997-06-12 2000-02-22 Stiebel Eltron Gmbh & Co. Kg Gas burner for a heating furnace
DE19758557A1 (de) * 1997-11-26 1999-07-22 Webasto Thermosysteme Gmbh Niederdruckzerstäubungsvorrichtung mit mehreren benachbarten Zweistoffdüsen
US6261089B1 (en) * 1999-11-15 2001-07-17 Industrie Polidoro A. Spa Fuel gas burner with low NOx content emissions
US20050181321A1 (en) * 2004-02-06 2005-08-18 Sit-Bray Limited Air/gas burner system
FR2867260A1 (fr) * 2004-03-02 2005-09-09 Solaronics Irt Dispositif pour raccorder un element radiant chauffe au gaz

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2194321A2 (fr) * 2008-12-05 2010-06-09 Boo-Sung Hwang Brûleur à combustion d'hydrogène-oxygène
EP2194321A3 (fr) * 2008-12-05 2012-08-22 Boo-Sung Hwang Brûleur à combustion d'hydrogène-oxygène
WO2016134061A1 (fr) * 2015-02-17 2016-08-25 Clearsign Combustion Corporation Stabilisateur de flamme perforé à buse de carburant réglable
US10578301B2 (en) 2015-02-17 2020-03-03 Clearsign Technologies Corporation Perforated flame holder with adjustable fuel nozzle
US11248786B2 (en) 2015-02-17 2022-02-15 Clearsign Technologies Corporation Method for a perforated flame holder with adjustable fuel nozzle

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