WO2004104477A1 - Bruleur reglable - Google Patents

Bruleur reglable Download PDF

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Publication number
WO2004104477A1
WO2004104477A1 PCT/EP2004/005475 EP2004005475W WO2004104477A1 WO 2004104477 A1 WO2004104477 A1 WO 2004104477A1 EP 2004005475 W EP2004005475 W EP 2004005475W WO 2004104477 A1 WO2004104477 A1 WO 2004104477A1
Authority
WO
WIPO (PCT)
Prior art keywords
burner
regulating element
mixture
openings
distributing
Prior art date
Application number
PCT/EP2004/005475
Other languages
English (en)
Inventor
Giuseppe Fogliani
Wenzel Mach
Massimo Dotti
Massimo Gilioli
Stephanus Wijkmans
Original Assignee
Worgas - Bruciatori - S.R.L.
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 - S.R.L. filed Critical Worgas - Bruciatori - S.R.L.
Priority to US10/557,769 priority Critical patent/US20070054228A1/en
Priority to EP04734232A priority patent/EP1629232A1/fr
Publication of WO2004104477A1 publication Critical patent/WO2004104477A1/fr
Priority to US12/213,756 priority patent/US20090017407A1/en

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
    • 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
    • F23D14/06—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 radial outlets at the 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
    • F23D14/46—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
    • 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
    • F23D2203/1026—Flame diffusing means using perforated plates with slotshaped openings
    • 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 an adjustable burner, in other words a burner wherein the power supplied during operation can be varied within wide limits .
  • the diffuser of an adjustable burner is made from materials suitable for withstanding particularly high temperatures without getting damaged, which however has the consequence of significantly increasing the cost of the burner.
  • the distributing elements known from the prior art are connected to the body of the burner by means of welding and are positioned by means of an aligning pivot. Fixing by means of welding and positioning by means of an aligning pivot ' give rise to a noticeable : increase of time and cost in producing the burner.
  • the object of the present invention is to provide an adjustable burner in which the phenomenon of flattening of the flames on the diffuser is absent or at least greatly reduced in such a way as to make it possible to make the diffuser without using materials that are highly resistant to temperature.
  • a further object of the present invention is to provide a burner in which there is a substantially uniform distribution of the flow of mixture at the outlet openings thereof that are made in the diffuser of the burner, achieving all this with moderate outlay of cost and time.
  • a burner may be fed with a mixture of air and fuel, comprising a burner body provided with a diffuser in the surface of which openings are made for the exit of the mixture delivered into the body of the burner, distributing means for distributing the flow of mixture, said distributing means being inserted inside the body of the burner characterized in that the distributing means comprises a regulating element for regulating the flow of said mixture, said regulating element being provided with further openings for the transit of the mixture, said regulating element being movable inside the body of the burner.
  • the regulating element is movable inside the body of the burner, it is possible to vary the reciprocal position of the openings made in the diffuser of the burner and of the further openings made in the body of the regulating element.
  • This enables the overall section of the outlet placed at the disposal of the mixture to be varied in such a way that as the power supplied by the burner varies, i.e. as flow of mixture to the burner varies, it is possible to maintain an outflow speed of the mixture that prevents flattening on the diffuser of the burner of the flames produced by the combustion of the mixture.
  • This condition can be maintained within a wide power range, for example between 20% and 100% of the nominal power of the burner.
  • a burner that may be fed with a mixture of air and fuel, comprising a burner body provided with a diffuser in the surface of which openings are made for the exit of the mixture delivered into the body of the burner, distributing means inserted inside the body of the burner, said distributing means comprising a distributing element provided with further openings for the transit of the mixture, characterized in that the distributing element is connected to the body of the burner by means of mechanical interference fit.
  • the mechanical interference fit between the distributing element and the body of the burner enables rapid, simple and cheap assembly of the burner, with noticeable time and production cost savings .
  • a burner that may be fed with a mixture of air and fuel, comprising a burner body in the surface of which openings are made for the exit of the mixture delivered into the body, characterized in that the burner body is subdivided into a plurality of sections, each one of which may be fed independently of the others.
  • Figure 1 is an elevation view of a burner according to the invention
  • Figure 2 is the section II-II in Figure 1;
  • Figure 3 is a partially fragmentary perspective view of a first version of a burner according to the invention;
  • Figure 4 is a view of the burner in Figure 3, slightly rotated in relation to the view in Figure 3;
  • Figure 5 is a schematic section of the burner in Figures 3 and 4;
  • Figure 6 is a plan view of a detail of the burner in Figures 3 to 5;
  • Figure 7. is a plan view of a first variation of the detail in Figure 6;
  • Figure 8 is a plan view of a second variation of the detail in Figure 6;
  • Figure 9 is a perspective view of a first embodiment of the regulating element of the first variation of a burner according to the invention.
  • Figures 9a-9d schematically illustrate the operation of the regulating element in Figure 9;
  • Figure 10 is a perspective view of a second embodiment of the regulating element of the first variation of a burner according to the invention.
  • Figures lOa-lOd schematically illustrate the operation of the regulating element in Figure 10;
  • Figure 11 is a perspective view of a third embodiment of the regulating element of the first variation of a distributor according to the invention.
  • Figure 12 is a perspective view of a second variation of a burner according to the invention.
  • Figure 13 is a partially fragmentary view like the one in Figure 12;
  • Figure 14 is a perspective view of the internal part of the burner in Figures 12 and 13;
  • Figure 15 is an enlarged detail of Figure 13;
  • Figure 16 is an enlarged detail of Figure 12;
  • Figure 17 is a perspective view of a distributing element of the burner in Figures 12 and 13.
  • FIGS 1 and 2 there is illustrated a burner 1 according to the invention comprising a burner body 2 in the surface of which openings 3 are made through which a mixture of air and fuel can exit that was delivered into the body 2 of the burner 1 by means of a Venturi tube 6.
  • a distributing element 4 is arranged, for example having a cylindrical shape, interposed between the Venturi tube 6 and the body 2 of the burner 1.
  • the distributing element 4 is provided with a series of further openings 5 through which the mixture of air and fuel delivered into the burner 1 by means of the Venturi tube can pass before exiting from the openings 3 made in the body 2 of the burner 1.
  • the distributing element 4 is used to level the flow of mixture that reaches the openings 3 of the body 2 of the burner 1, which, in the absence of the distributor, would be greater at the openings 3 that are nearer the outlet 6a of the Venturi tube 4 and less at the openings that are further from the outlet 6a.
  • the distributing element 4 is centered inside the body 2 of the burner 1 on two projections: an upper projection 7 and a lower projection 8 that protrude inside the body 2 of the burner 1 and respectively form an upper and a lower base of the body 2.
  • the lower base 8 is provided with a central opening 8a for the passage of the Venturi tube 6.
  • FIGS 3 to 9D illustrate a second embodiment of a burner 1 according to the invention, in which between the distributing element 4 and the body 2 of the burner 1 there is interposed a regulating element 9 equipped with openings 10 distributed along its entire surface, the function of the regulating element 9 is to vary the transit section of the mixture between the inside and the outside of the body 2, to adjust the speed of flow of the mixture conveyed to the openings 3 made on the diffuser of the burner 1.
  • the regulating element 9 is associated with moving means 12, 13 suitable for causing a shift of the regulating element 9 in relation to the body 2 of the burner 1 and to the distributing element 4.
  • the shift comprises a translation of the regulating element 9 in relation to the body 2 of the burner 1 and to the distributing element 4, in a direction parallel to- a longitudinal axis of the body 2 of the burner. • .. ⁇ - •
  • the - regulating element ' 9 is connected by means of a plurality of arms 11, for example three arms 11 staggered by 120° in relation to one another, to an annular element 17 fixed to the shaft 12 of a linear actuator 13, that controls translation of the regulating element 9.
  • the shift of the regulating element 9 causes a variation in the relative positions of the openings 3 of the body 2 of the burner 1, of the openings 5 of the distributing element 4 and of the openings 10 of the regulating element 9, thus varying the transit section available for the exit of the mixture of air and fuel delivered into the burner 1.
  • this transit section will decrease as the operating power of the burner decreases, in such a way that the speed of exit of the mixtures is maintained at a value that is sufficient to prevent flattening of the flames on the surface of the body 2 of the burner, and will increase as operating power increases in such a way as to maintain the speed of exit of the mixture below the value that causes separation of the flames from the surface of the body 2 of the burner 1.
  • Figures 9A-9D illustrate the operation of the further distributing element 9.
  • Figures 9B, 9C and 9D illustrate three different positions of the regulating element 9 in relation to the body 2 of the burner.
  • Figure 9B refers to a position of the regulating element 9 in relation to a condition of low-power operation of the burner 1
  • Figure 9C refers to a position of the regulating element 9 in relation to a condition of medium-power operation of the burner 1
  • Figure 9D refers to a position of the regulating element 9 in relation to a condition of maximum-power operation of the burner 1.
  • Figures 6, 7 and 8 are plan views 'of the regulating element 9, in three different embodiments, wherein the regulating element 9 is provided with anti- stopping means 14, 15, 16, suitable for preventing the regulating element 9 from stopping during its translation against the internal surface of the body 2 of the burner 1.
  • the body 2 of the burner 1 normally consists of a metal sheet curved into a cylindrical shape, with a joint, for example a weld, along a generatrix of the cylindrical body 2 of the burner 1.
  • the joint even if it has been made with precision, inevitably always protrudes inside the body 2 of the burner 1.
  • the radial play between the body 2 of the burner 1 and the regulating element 9 must be very small to prevent, or minimise, leaks of mixture, which would make it impossible or at least very difficult to adjust the speed of exit of the mixture to variations of the space for the transit of the mixture.
  • the regulating element To avoid the risk of stopping, the regulating element
  • Figures 6, 7 and 8 show some examples of embodiments of the anti-stopping means 14, 15, ' 16.
  • the anti-stopping means takes the form of an opening' 14 along a generatrix of the further regulating element 9, which is ' .positioned at the junction of the body 2 of the burner ' 1, in such a way that during movement of the . regulating element 9 there is no interference with the joint.
  • the anti-stopping means take the form of a recess 15 that in turn extends along a generatrix of the regulating element 9 and is positioned at the junction of the body 2 of the burner 1.
  • the anti-stopping means take the form of a joint that extends along a generator of the regulating element 9 and is provided with a recess
  • Figure 10 shows a second embodiment of the further distributing element according to the invention.
  • the regulating element 9a is provided with slits 18 arranged in a direction parallel to the generatrices of the surface of- the regulating element 9a.
  • the corresponding movement of the regulating element 9a in relation to the body 2 of the burner will be a rotation movement around a longitudinal axis of the body 2, rather than a translation movement.
  • Figures 10A-10D show the operation of the regulating element 9a.
  • Figures 10B, IOC and 10D show three different positions of the regulating element 9a in relation to the body 2 of the burner.
  • Figure 10B refers to a position of the regulating element 9a in relation to a low-power operating condition of the burner 1
  • Figure IOC refers to a position of the regulating element 9a in relation to a medium-power operating condition of the burner 1
  • Figure 10D refers to a position of the regulating element 9a in relation to a maximum-power operating condition of- the burner 1.
  • a third embodiment 9b of the regulating element ' is shown in Figure 11.
  • This third embodiment is similar, in terms of the arrangement and distribution of the slits 10, to the embodiment shown in Figure 9, but differs from the latter inasmuch as it is provided with a series of seal rings 19, which are distributed at a substantially constant pitch along the entire length of the regulating element 9b and serve to prevent leaks of mixture between the regulating element 9b and the internal surface of the body 2 of the burner 1.
  • Figures 12 to 17 show a third embodiment of a burner 101 according to the invention comprising a body 102 with a cylindrical shape, subdivided into a plurality of sections 103 each one of which comprises a sector of a cylindrical surface.
  • openings 104 are made, for example in the form of slits, through which a mixture of air and fuel delivered into the body 102 of the burner 101 can exit .
  • a distributing element 105 is arranged, having a function that is similar to that of the distributing element 4 disclosed above.
  • the distributing element 105 also has a cylindrical shape and is arranged concentrically in relation to the cylindrical body 102 of the burner 101.
  • the distributing element 105 is subdivided into a plurality of sections 106, each of which comprises a sector of a cylindrical surface and corresponds to one of the sections 103 of the body 102 of the burner 101.
  • openings 107 are made for the transit of the mixture of air and fuel.
  • the sections 103 of the body 102 of the burner . and the sections 106 of the distributing element 105 are fixed to a series of radial baffles 108, that lead away from a central hollow cylindrical support 109.
  • the radial baffles 108 are preferably distributed at a substantially constant angular pitch.
  • the radial baffles 108, the sections 106 of the distributing element 105 and the sections 103 of the body 102 of the burner 101 define a plurality of burner sectors 110, separated from one another.
  • the sections 103 of the body 102 of the burner 101 are provided at their ends with edges 111 folded towards the inside of the body 102 ( Figure 16) .
  • Pairs of edges 111 of adjacent sections 103 are inserted into grooves 112 made at the external end of each radial baffle 108 to fix the sections 103 of the body 102 to the radial baffles 108.
  • the grooves 112 extend in a direction substantially parallel to the longitudinal axis of the hollow cylindrical support 109.
  • Each radial baffle 108 ( Figure 15) is furthermore provided on both its sides, at a certain distance from its external end, with a pair of fins 113, 114 protruding in a substantially perpendicular direction from the baffle 108 and defining between them a corresponding groove 115, 116, in which an end of a section 106 of the distributing element 105 is insertable and immobilisable. In this way, the sections 106 of the distributing element 105 are fixed to the baffles 108.
  • the fins 113, 114 and the grooves 115, 116 extend in a direction substantially parallel to the longitudinal axis of the hollow cylindrical support 109.
  • the central hollow cylindrical support 109 is provided with groups of openings 117, for the transit of the mixture of air and fuel.
  • Each group of openings 117 communicates with one of the burner sectors 110: the number of groups of openings 117 therefore coincides with the number of sectors 110 in which the body 102 of the burner 101 is subdivided.
  • the openings 117 have for example the shape of slits, the greater side of which extends in a direction parallel to the generatrices of the cylindrical support 109.
  • the regulating element 118 comprises a hollow cylindrical body, in the surface of which openings 119 are made, for example in the shape of slits, the greater side of which extends in a direction substantially parallel to the generatrices of the regulating element 118.
  • the regulating element 118 may rotate in relation to the cylindrical support 109, the rotation of the regulating element 118 in relation to the cylindrical body 109 being achieved by rotating actuating means that is not shown.
  • the slits 119 of the regulating element 118 are arranged in such a way that, depending on the angular position of the regulating element 118 in relation to the cylindrical support 109, they coincide with one or . more groups of slits 117 of the cylindrical support 109. In this way, the mixture delivered into the regulating element 118. supplies one or more sectors 110 of the body 102 of the burner.
  • the operating power of the burner 101 can therefore be adjusted by varying the number of the sectors 110 supplied by the mixture of air and fuel.
  • the angular position of the distributing element 118 in relation to the cylindrical support 109 will be chosen in such a way that all the sectors 110 of the burner 101 are supplied whilst at operating power below nominal maximum power the angular position of the distributing element 118 will be chosen in such a way that only one part of the sectors 110 of the burner 101 is supplied.
  • the power delivered by the burner 101 can be modulated by adjusting the fuel supply until the power delivered is reduced to about half the maximum power deliverable by the burner 101 in that condition, i.e. without the risk that flattening of the flames on the surface of the body 102 of the burner 101 occurs.
  • the sections 110 are supplied independently of one another with the mixture of air and fuel, by respective supply means.
  • This mixture of air and fuel is delivered into each of the sections 110 in the space defined between the hollow cylindrical support 109, a pair of radial baffles 108, a respective section 106 of the distributing element 105 and a respective section 103 of the body 102.

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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

L'invention concerne un brûleur (1) pouvant être alimenté à l'aide d'un mélange d'air et de combustible. Ledit brûleur comprend un corps (2) de brûleur présentant un diffuseur à la surface duquel des ouvertures (3) sont présentes pour la sortie dudit mélange distribué dans le corps (2) de brûleur (1), des moyens de distribution (4; 9, 9a, 9b) insérés dans ledit corps (2) de brûleur, lesdits moyens de distribution (4; 9, 9a, 9b) comprenant un élément de régulation (9, 9a, 9b) présentant des ouvertures supplémentaires (10, 18) destinées au passage dudit mélange, ledit élément de régulation (9, 9a, 9b) étant mobile dans ledit corps (2) du brûleur. Le corps (102) du brûleur peut être subdivisé en une pluralité de secteurs (110), chacun pouvant être alimenté indépendamment des autres secteurs.
PCT/EP2004/005475 2003-05-23 2004-05-21 Bruleur reglable WO2004104477A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US10/557,769 US20070054228A1 (en) 2003-05-23 2004-05-21 Adjustable burner
EP04734232A EP1629232A1 (fr) 2003-05-23 2004-05-21 Bruleur reglable
US12/213,756 US20090017407A1 (en) 2003-05-23 2008-06-24 Adjustable burner

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000154A ITMO20030154A1 (it) 2003-05-23 2003-05-23 Bruciatore modulabile
ITMO2003A000154 2003-05-23

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/213,756 Division US20090017407A1 (en) 2003-05-23 2008-06-24 Adjustable burner

Publications (1)

Publication Number Publication Date
WO2004104477A1 true WO2004104477A1 (fr) 2004-12-02

Family

ID=30012754

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/005475 WO2004104477A1 (fr) 2003-05-23 2004-05-21 Bruleur reglable

Country Status (5)

Country Link
US (2) US20070054228A1 (fr)
EP (1) EP1629232A1 (fr)
IT (1) ITMO20030154A1 (fr)
RU (1) RU2005140276A (fr)
WO (1) WO2004104477A1 (fr)

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EP1985922A3 (fr) * 2007-04-27 2008-11-12 Paloma Industries, Ltd. Brûleur
WO2008142531A2 (fr) * 2007-05-21 2008-11-27 Worgas - Bruciatori - S.R.L. Modulation du brûleur
WO2009112909A2 (fr) * 2008-03-10 2009-09-17 Worgas-Bruciatori - S.R.L. Brûleur pourvu d'un moyen de réduction de bruit
EP2551590A3 (fr) * 2011-07-25 2013-02-06 Polidoro S.p.A. Brûleur super-stochiométrique amélioré
EP2759768A1 (fr) * 2013-01-28 2014-07-30 Worgas Burners Limited Brûleur à gaz
EP2037175B1 (fr) 2007-09-12 2016-11-23 Polidoro S.p.A. Brûleur à prémélange

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US8591222B2 (en) * 2009-10-30 2013-11-26 Trane International, Inc. Gas-fired furnace with cavity burners
JP2013513774A (ja) * 2009-12-11 2013-04-22 ベーカート・コンバスチョン・テクノロジー・ベスローテン・フェンノートシャップ 低多孔率バーナデッキを有するバーナ
CN103062749A (zh) * 2013-01-29 2013-04-24 山西省第二建筑工程公司 提高燃气锅炉热效率的方法
WO2015009300A1 (fr) * 2013-07-18 2015-01-22 Johns Manville Brûleur de combustion refroidi par fluide et procédé de fabrication du dit brûleur
DE102014226060A1 (de) * 2014-12-16 2016-06-16 Robert Bosch Gmbh Brennervorrichtung und Verfahren zur Optimierung einer Brennervorrichtung
IT201600106728A1 (it) * 2016-10-24 2018-04-24 Worgas Bruciatori Srl Bruciatore
US11852319B2 (en) * 2021-02-26 2023-12-26 Armando Parra Control means for vortex flame device
US20240044488A1 (en) * 2022-11-23 2024-02-08 Beckett Thermal Solutions Burner with integral mixer

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WO2008142531A2 (fr) * 2007-05-21 2008-11-27 Worgas - Bruciatori - S.R.L. Modulation du brûleur
WO2008142531A3 (fr) * 2007-05-21 2009-08-27 Worgas - Bruciatori - S.R.L. Modulation du brûleur
EP2037175B1 (fr) 2007-09-12 2016-11-23 Polidoro S.p.A. Brûleur à prémélange
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EP2551590A3 (fr) * 2011-07-25 2013-02-06 Polidoro S.p.A. Brûleur super-stochiométrique amélioré
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EP1629232A1 (fr) 2006-03-01
RU2005140276A (ru) 2007-06-27
US20070054228A1 (en) 2007-03-08
ITMO20030154A0 (it) 2003-05-23
ITMO20030154A1 (it) 2004-11-24
US20090017407A1 (en) 2009-01-15

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