EP0635677A1 - Flammenhalterplatte für Gasbrenner, Verfahren zu seiner Herstellung und Brenner mit einer solchen Platte - Google Patents

Flammenhalterplatte für Gasbrenner, Verfahren zu seiner Herstellung und Brenner mit einer solchen Platte Download PDF

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Publication number
EP0635677A1
EP0635677A1 EP94401586A EP94401586A EP0635677A1 EP 0635677 A1 EP0635677 A1 EP 0635677A1 EP 94401586 A EP94401586 A EP 94401586A EP 94401586 A EP94401586 A EP 94401586A EP 0635677 A1 EP0635677 A1 EP 0635677A1
Authority
EP
European Patent Office
Prior art keywords
plate
network
strip
compressed
sections
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
EP94401586A
Other languages
English (en)
French (fr)
Other versions
EP0635677B1 (de
Inventor
Dominique Walter
Anne-Béatrice Pernaud
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.)
Engie SA
Original Assignee
Gaz de France SA
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 Gaz de France SA filed Critical Gaz de France SA
Publication of EP0635677A1 publication Critical patent/EP0635677A1/de
Application granted granted Critical
Publication of EP0635677B1 publication Critical patent/EP0635677B1/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
    • F23D14/46—Details
    • 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
    • F23D14/02—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
    • 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
    • F23D2203/103—Flame diffusing means using screens
    • 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
    • F23D2900/00019—Outlet manufactured from knitted fibres

Definitions

  • the invention relates to a flame attachment plate, usable in particular on gas mixture burners.
  • They are made of various materials, such as ceramic or metal, and are generally pierced with orifices of suitable size and distribution to allow the passage of gases and their combustion. They are arranged in the gas burner between the distribution and combustion chambers, which they separate.
  • Such pierced plates still pose problems related to their mounting because they are in fact often made up of several thin plates which must be stacked on top of each other in the burner. This poses adjustment problems between the plates and induces a high installation cost.
  • the object of the invention is to solve these difficulties by means of an improved flame attachment plate, allowing in particular an effective stabilization and a good distribution of the flames over its entire surface, with the formation of a substantially uniform flame front, favoring, in addition, limiting the risk of backfire.
  • the plate according to the invention causes a relatively low pressure drop of approximately 35 to 50 Pa and promotes the limitation of the quantities of harmful gases emitted (carbon oxides, nitrogen, etc.).
  • the proposed solution consists of a plate having passages passing through it for the circulation through it of the gases to be burned, the plate of the invention being characterized in that it comprises, in its constitution, a compressed network of wire (s) with interlaced parts forming between them said gas passages.
  • the invention notably allows, by its structure or texture in wire (s) with interlaced parts, a substantially uniformly distributed passage of gases over the entire surface of the plate, with regular spreading of the flame created, rendering possible in practice (for example in the case of heating installations), to advantageously reduce the spacing between the flame attachment zone and the heat exchanger often associated with the burner, since the flame front can be relatively low height.
  • the invention also relates to a burner of the general gas mixture type, comprising a distribution chamber supplied with combustion air and combustible gas, communicating with a combustion chamber, with interposition between them of the plate according to the invention.
  • the plate of the invention can be used in particular for domestic burners, such as, for example, blown air, total premix and blue flame, making possible in particular a large modulation in power, which can, for example, go from '' approximately 3 to 33 kilowatts, or a power modulation of 1: 11, with a pfd which can range from 225 to 2500 kw / cm2, approximately.
  • domestic burners such as, for example, blown air, total premix and blue flame
  • a large modulation in power which can, for example, go from '' approximately 3 to 33 kilowatts, or a power modulation of 1: 11, with a pfd which can range from 225 to 2500 kw / cm2, approximately.
  • this plate or sieve distribution can have a shape for example of substantially circular section (Figure 1) or rectangular parallelepiped ( Figure 10), with dimensions adapted to those of the associated burner.
  • the plate comprises, in its constitution, a network 2 of flexible wire (s) 12, with intertwined or entangled parts, providing between them passages 27 or channels passing through the plate for the gas flow through it. It appears that the entanglement of the parts of wire (s) of the network, when the latter is in a compressed state, likewise that the shape, size and position of the gas passage orifices within the plate are random and depend on the force which has been exerted on the network to compress it.
  • This network of thread (s) or interlacing 2 is presented here as a knitted work 10 consisting of at least one flexible thread.
  • this knitted work is made of a single yarn 12 extending continuously between its free ends 12a and 12b ( Figure 2).
  • This wire may be made of a ductile metallic material which is easily knitted, such as for example "304L" stainless steel two tenths of a millimeter in diameter.
  • the material used to make the plate should preferably retain its characteristics (mechanical in particular) up to high temperatures, of the order of about 1000 ° C to 1200 ° C.
  • FIG 3 there is schematically illustrated how the loops 19 in " ⁇ " (OMEGA) of the wire 12 can intertwine with each other, defining stitches 14, of suitable dimensions.
  • These meshes (corresponding to the aforementioned passages 27) being advantageously relatively loose at the origin, the mesh produced can be easily deformed in different directions at the start of the shaping of the plate.
  • FIG. 4 shows more precisely the intertwining of the sections or parts 15 of the wire, which overlap upside down, thus presenting intertwining zones as referenced at 17, these sections forming “upper” loops 19a which pass through the loops below them 19b, thus delimiting the passages 27.
  • these passages of the knitted work have been shown in a relatively loose state, these same passages being found distributed throughout the structure of the network in the compressed state according to shape, size and arrangement function of the compressive forces exerted.
  • a knitted work 10 in the form of a cylindrical tube ( Figure 2), deformable and compressible.
  • This tube is first of all flattened or flattened along two fold lines 16, 18, both substantially parallel to the longitudinal axis 20 of this tube, the knitted work then having the general shape of a strip 21 of double thickness .
  • the strip obtained is then wound on itself, from one of its ends 21a.
  • FIG. 6 it can be seen that the roll 22 formed, of axis 25 substantially perpendicular to the longitudinal axis 46 of the strip, is advantageously produced by tightening the strip well when it is wound on itself.
  • This winding 22 is then compressed substantially uniformly along its axis 25, in the direction of the arrows F a and F ' a , and possibly in the case where this compression along the axis 25 is insufficient, also perpendicularly to this axis 25 in the direction of the arrows Fr, until the compressed network constituting the desired plate is obtained such as that of FIG. 1, which compressed network preserves between its parts of wire (s) the passages, although deformed, intended for the circulation of gases .
  • the axial compression will first be applied, then, if necessary, the radial compression. Note that here the compression is therefore carried out substantially parallel and perpendicular to the surface of the plate thus formed.
  • the plate, whose orifices 27 for the passage of gases will thus be randomly distributed over its entire surface, will in particular allow effective self-stabilization of the flame.
  • FIG. 7 Another possibility of making this plate is shown in FIG. 7, with a view for example to obtaining the plate in the form of a substantially quadrilateral in FIG. 10.
  • the strip is folded several times on itself in a stacking direction of the folds 45 in the manner of an accordion, constituting a series of folds of which only the upper fold has been referenced at 42 , the folds can be arranged substantially parallel to the plane 30 of the plate thus formed.
  • This fold 40 is then compressed, being advantageously subjected to a first compression substantially along the stacking axis 45 of the folds in the direction of the arrows F a and F ' a , then if desired a second compression, substantially perpendicular to this same axis 45, in the direction of the arrows F l .
  • the plate 1 as illustrated in FIG. 8, provision could also be made for it to consist of a stack 40a of sections 42a pre-cut from the strip 21, all of substantially equal dimensions, this stack then being compressed substantially parallel, and incidentally, perpendicular to the stacking axis 45a of these sections.
  • the parts or sections 42a of the stacked strip will be oriented substantially parallel to the plane 30 of the plate, the axis 45a then being substantially perpendicular to this plane.
  • the dimensions of the knitted work 10, as well as of the roller 22 of the folding 40, or of the stack 40a, will be adapted so that, after compression, the dimensions of the plate correspond substantially to those of the associated burner .
  • a flame hooking plate of circular shape
  • this roller is then subjected to a substantially axial pressure (Fa, Fa ') to reduce the height of the plate to about 15 mm.
  • a metal banding (not shown) may allow the plate to be held around its periphery.
  • a plate 1 mounted in a burner of known type, referenced as a whole at 80, such as for example a domestic air burner, premixed total and blue flame.
  • This burner 80 essentially comprises a distribution chamber 81, which has the general shape of a truncated cone box, of substantially circular section, connected at its narrowest rear face 81a to separate supply lines 83, 84 in combustion air and combustible gas respectively.
  • This distribution chamber 81 is delimited transversely, on its front face, by the flame attachment plate 1.
  • this plate is in the form of a substantially circular disc, mounted in a hoop 90 whose dimensions are adapted to those of the burner to which it is fixed by any means known to those skilled in the art, the plate being disposed substantially perpendicular to the axis 86 of the chamber 81 so as to separate the latter from the combustion chamber 82.
  • the letters AV and AR make it possible to locate the sides "front” and “rear” of the burner, respectively, with reference to the circulation of the combustible mixture, in the burner, as shown diagrammatically by the arrows 87, 87 ' and 88.
  • the line 84 for supplying combustible gas meets the line 83 for air supply just upstream from the distribution chamber (at 85).
  • the ignition of the burner is ensured by an electrode 97 suitably insulated and supplied under high voltage, by a power cable not shown, the ignition being effected by sparks or electric arc between the tip 97a of the 'electrode and, for example, the wall next to the plate (if the latter is metallic) or the wall of the combustion chamber, or even the grid 1 itself.
  • the screened structure or plate 1 of stainless steel reference "304L" may have a diameter of approximately 130 mm and a thickness of approximately 15 mm to be installed in a domestic burner whose distribution chamber consists of a truncated cone of approximately 95 mm in height. It was found that in operation the maximum pressure drop created by the combustion head 1 is relatively low, of the order of 50 Pa, the maximum temperature at the outlet 1a of the plate 1 at stoichiometry being 750 ° C; furthermore, no significant noise pollution was observed. It will be noted that the plate according to the invention can be mounted on gas premix burners as well as on burners without premix.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)
EP19940401586 1993-07-19 1994-07-08 Flammenhalterplatte für Gasbrenner, Verfahren zu seiner Herstellung und Brenner mit einer solchen Platte Expired - Lifetime EP0635677B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9308827 1993-07-19
FR9308827A FR2708083B1 (fr) 1993-07-19 1993-07-19 Plaque d'accrochage de flamme pour brûleur à gaz, son procédé de fabrication et brûleur comprenant une telle plaque.

Publications (2)

Publication Number Publication Date
EP0635677A1 true EP0635677A1 (de) 1995-01-25
EP0635677B1 EP0635677B1 (de) 1998-05-06

Family

ID=9449355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940401586 Expired - Lifetime EP0635677B1 (de) 1993-07-19 1994-07-08 Flammenhalterplatte für Gasbrenner, Verfahren zu seiner Herstellung und Brenner mit einer solchen Platte

Country Status (4)

Country Link
EP (1) EP0635677B1 (de)
DE (1) DE69410030T2 (de)
ES (1) ES2115894T3 (de)
FR (1) FR2708083B1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0840061A1 (de) 1996-11-04 1998-05-06 Gaz De France Flammenhalter für Gasbrenner und Brenner mit einem solchen Flammenhalter
EP1039218A1 (de) * 1999-03-22 2000-09-27 Siabs Industry S.R.L. Vorrichtung zur Strahlungsheizung, insbesondere für Aussengebrauch
FR2792394A1 (fr) 1999-04-16 2000-10-20 Gaz De France Gdf Service Nati Procede pour realiser une surface d'accrochage de flammes
DE10233340A1 (de) * 2002-07-23 2004-03-04 Rational Ag Porenbrenner sowie Gargerät, enthaltend mindestens einen Porenbrenner
EP1544542A1 (de) * 2003-12-18 2005-06-22 Riello S.p.a. Abdeckung eines Brennerkopfes, und Gasbrenner mit einer solchen Abdeckung
EP1715247A1 (de) * 2005-04-19 2006-10-25 Paul Scherrer Institut Brenner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1429149A1 (de) * 1962-12-14 1969-01-09 Matsushita Electric Ind Co Ltd Strahlungsbrenner
JPS58205012A (ja) * 1982-05-25 1983-11-29 Iwao Harayama 多孔通気板
SU1090423A1 (ru) * 1983-01-10 1984-05-07 Предприятие П/Я Р-6603 Огнепреградитель дл быстрогор щих смесей
US4657506A (en) * 1984-12-10 1987-04-14 Glowcore Corporation Gas burner

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1429149A1 (de) * 1962-12-14 1969-01-09 Matsushita Electric Ind Co Ltd Strahlungsbrenner
JPS58205012A (ja) * 1982-05-25 1983-11-29 Iwao Harayama 多孔通気板
SU1090423A1 (ru) * 1983-01-10 1984-05-07 Предприятие П/Я Р-6603 Огнепреградитель дл быстрогор щих смесей
US4657506A (en) * 1984-12-10 1987-04-14 Glowcore Corporation Gas burner

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 8501, Derwent World Patents Index; AN 85-004463 *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 50 (M - 281) 7 March 1984 (1984-03-07) *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0840061A1 (de) 1996-11-04 1998-05-06 Gaz De France Flammenhalter für Gasbrenner und Brenner mit einem solchen Flammenhalter
FR2755500A1 (fr) * 1996-11-04 1998-05-07 Gaz De France Dispositif d'accrochage de flammes modulable pour bruleur a melange de gaz peu polluant a flamme auto-stabilisee, et bruleur muni d'un tel dispositif
US5989015A (en) * 1996-11-04 1999-11-23 Gaz De France (G.D.F.) Service National Variable flame retention device utilizing an interwoven flexible wire metal gauze
EP1039218A1 (de) * 1999-03-22 2000-09-27 Siabs Industry S.R.L. Vorrichtung zur Strahlungsheizung, insbesondere für Aussengebrauch
FR2792394A1 (fr) 1999-04-16 2000-10-20 Gaz De France Gdf Service Nati Procede pour realiser une surface d'accrochage de flammes
DE10233340A1 (de) * 2002-07-23 2004-03-04 Rational Ag Porenbrenner sowie Gargerät, enthaltend mindestens einen Porenbrenner
DE10233340B4 (de) * 2002-07-23 2004-07-15 Rational Ag Porenbrenner sowie Gargerät, enthaltend mindestens einen Porenbrenner
EP1544542A1 (de) * 2003-12-18 2005-06-22 Riello S.p.a. Abdeckung eines Brennerkopfes, und Gasbrenner mit einer solchen Abdeckung
EP1715247A1 (de) * 2005-04-19 2006-10-25 Paul Scherrer Institut Brenner

Also Published As

Publication number Publication date
EP0635677B1 (de) 1998-05-06
DE69410030D1 (de) 1998-06-10
FR2708083B1 (fr) 1995-09-01
FR2708083A1 (fr) 1995-01-27
DE69410030T2 (de) 1999-02-11
ES2115894T3 (es) 1998-07-01

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