EP2017529B1 - Brenner - Google Patents

Brenner Download PDF

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Publication number
EP2017529B1
EP2017529B1 EP08160478.7A EP08160478A EP2017529B1 EP 2017529 B1 EP2017529 B1 EP 2017529B1 EP 08160478 A EP08160478 A EP 08160478A EP 2017529 B1 EP2017529 B1 EP 2017529B1
Authority
EP
European Patent Office
Prior art keywords
burner
tube
tubes
flange
air
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.)
Not-in-force
Application number
EP08160478.7A
Other languages
English (en)
French (fr)
Other versions
EP2017529A1 (de
Inventor
Louis Ricci
Gaël Le Piver
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.)
Fives Pillard SA
Original Assignee
Fives Pillard 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 Fives Pillard SA filed Critical Fives Pillard SA
Publication of EP2017529A1 publication Critical patent/EP2017529A1/de
Application granted granted Critical
Publication of EP2017529B1 publication Critical patent/EP2017529B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C7/00—Combustion apparatus characterised by arrangements for air supply
    • F23C7/008—Flow control devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel
    • F23D17/002—Burners for combustion simultaneously or alternately of gaseous or liquid or pulverulent fuel gaseous or liquid fuel
    • 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
    • F23D2900/11402—Airflow diaphragms at burner nozzle

Definitions

  • the present invention relates to a burner, in particular a burner for a cement plant.
  • An axially extending type burner comprising an axial flow primary air supply annulus which surrounds all of the fuel supply lines and which is delimited by an inner tube extending along the axis of the burner and a co-axial outer tube to the inner tube, the two tubes being axially movable relative to each other in translation in the axial direction between an open position and a closed position .
  • Such a burner is for example disclosed in the patent application EP 967 434 , is usually used for cement plants, and includes two primary air supply lines surrounding all fuel supply lines of the burner. These two lines are the axial flow air supply line at the outlet of which the flow of air is parallel to the burner axis, possibly with a slight radial component, and a flow air supply line. tangential output of which the flow of air has a tangential component so as to form a swirling flow around the axis of the burner. In addition, such a burner is generally surrounded by secondary air supply lines.
  • this difficulty is solved by the implementation of a burner according to claim 1.
  • the outlet air coming both from the grooves formed in the flange and the annular space between the flange and the second tube, is distributed continuously over the entire periphery of the pipe, and thus surrounds the flame and thus protects the beginning of the latter from the rapid introduction of secondary air, which in particular reduces the rate of nitrogen oxides.
  • the outlet air originating solely from the grooves formed in the flange, is distributed discontinuously over the entire periphery of the pipe, and the air jets (corresponding to each groove) attract air secondary (usually having a high temperature) from the origin of the flame, which activates the latter and allows to activate the cooking of the material in the oven.
  • the figure 1 illustrates a portion of a burner 1 which extends along an axis 2 and which conventionally comprises solid fuel supply lines and / or liquid and / or gas and a central duct air intake which is used to allow the attachment of the flame to a flame stabilizer and to cool the latter.
  • the burner 1 also comprises a tangential flow primary air supply peripheral duct 3 which surrounds the central air supply duct and, in the present example, all the fuel supply ducts.
  • This tangential flow primary air supply peripheral duct 3 comprises devices making it possible to impart a tangential component to the flow of air at its outlet.
  • the tangential flow air supply line 3 is in accordance with one or the other of the conduits disclosed in the two patent applications. FR 2,887,597 and FR 06 04 829 .
  • the burner 1 further comprises a peripheral axial flow primary supply pipe 4 at the outlet of which the air has a substantially axial flow, that is to say without tangential component (or at least whose component tangential is weak, less than 10 ° with respect to the axis 2 of the burner 1).
  • the airflow is axial.
  • This axial flow primary air supply peripheral pipe 4 surrounds all the fuel supply pipes and the central air supply pipe.
  • the axial flow air supply pipe 4 surrounds the tangential flow air supply pipe 3.
  • the axial flow air supply line 4 is delimited by two tubes 5, 6 movable relative to one another in translation along the axis 2 of the burner 1, an inner tube 5 which, in the present embodiments, defines the axial flow air supply line 4 of the supply line tangential flow air 3, and an outer tube 6 which is coaxial with the inner tube 5 and forms the tube defining the burner 1 of the secondary air supply lines.
  • the two tubes 5, 6 are axially movable between an open position and a closed position.
  • one of the two tubes (in this case, the inner tube 5) carries, near its downstream end 7 (here, at its downstream end 7), an annular flange 8 (stationary relative to the inner tube 5) .
  • This annular flange 8 has grooves 9 which are regularly distributed angularly, which pass through it from one side, and which extend parallel to the axis 2 of the burner 1. In this case, the grooves represent about one third of the periphery of the flange 8.
  • each groove 9 is delimited on the one hand by a bottom wall 10 which, in this case, does not have any inclination in the direction of a displacement along the axis 2 of the burner 1, and, secondly, by two side walls 11 which, in this case, are parallel to each other and to the direction of the axis 2 of the burner 1, and are normal to the bottom wall 10.
  • the grooves 9 made in the annular flange 8 are open radially along their length, the flange 8 not carrying an upper wall facing the bottom wall 10.
  • the annular flange 8 has an upstream end 12 which has a radial inclination in the direction of a coming towards the outer tube 6 for a displacement along the axis 2 of the burner 1 upstream downstream.
  • the upstream end of the flange is conical (to the upstream orifices of the grooves 9) with a cone center disposed upstream of the tube.
  • the other tube (in this case, the outer tube 6) comprises a closing portion 13, 15 (stationary with respect to the outer tube 6) which is arranged so that, when the two tubes 5, 6 are in position d opening, the distance separating the closing portion 13, 15 of the flange 8 allows a significant passage of air between the flange 8 and the second tube 6 in order to have an axial air flow at the outlet of the pipe 4 angularly continuous (cf. figures 1 and 4 ), and when the two tubes 5, 6 are in the closed position, the distance separating the closing portion 13, 15 of the flange 8 is substantially zero in order to have an air flow at the outlet of the pipe 4 angularly discontinuous and limited to the angular sectors corresponding to the grooves 9 (cf. figures 2 and 5 ).
  • the closing portion 13 is a surface having a radial inclination in the direction of a spacing of the inner tube 5 for a displacement along the axis 2 of the burner 1 upstream downstream.
  • the closing portion 13 is conical with a cone center disposed upstream of the tube.
  • the half-angle at the top of the cone is about 10 °.
  • the downstream end 14 of the closing portion 13 is the downstream end 14 of the outer tube 6.
  • the two tubes 5, 6 are in an open position in which an annular space exists (and is relatively large) between the flange 8 and the outer tube 6.
  • the two tubes 5, 6 are in a closed position where the closing portion 13 is substantially in abutment against the annular flange 8 (against the upstream end 12 of the flange 8), thus limiting the passage section of the air in the grooves only 9.
  • the flange 8 is in a position which is upstream of the position it takes when the tube which carries it is in the open position.
  • the closing portion 15 comprises a first surface 16 having a radial inclination in the direction of an approximation of the inner tube 5 for a displacement along the axis 2 of the burner 1 from upstream to the downstream.
  • the first surface 16 is conical with a cone center disposed downstream of the tube.
  • the half-angle at the top of the cone is about 10 °.
  • the closing portion 15 comprises a second surface 17 (cylindrical) extending in the downstream direction, the first surface 16.
  • the second surface 17 has a diameter equal to the outer diameter of the flange 8 (the clearance necessary for the sliding of two tubes close).
  • figure 5 the two tubes 5, 6 are in a closed position where the cylindrical surface 17 covers the annular flange 8, thus limiting the air passage section to the grooves 9 only.
  • the flange is carried by the outer tube and the closing portion by the inner tube.
  • the annular flange prefferably has a different shape, especially at its upstream end, and / or to have upper walls facing the bottom walls and delimiting, with these and the side walls, the grooves. It would also be possible for the bottom walls to have a slight radial inclination (less than 10 °) in order to impart a radial component to the air flow at their outlet, and / or that the lateral walls have a tangential component in order to confer a component tangential to the flow of air at their output.
  • the closure portion could be a surface having a radial inclination in the direction of a spacing of the inner tube for a displacement along the axis of the burner from downstream to upstream (for example, the portion of closure could be tapered with a cone center disposed downstream of the tube, with an apex half-angle of about 10 °).
  • the two tubes define between them an important annular space at the flange, and in the closed position (position in which the flange is downstream of the position it takes when the tube that carries it is in opening position), the closing portion would be substantially in abutment against the annular flange (against the downstream end of the flange), thus limiting the section of passage of the air to the grooves only.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gas Burners (AREA)

Claims (9)

  1. Brenner (1), der sich entlang einer Achse (2) erstreckt und eine Axialstromprimärluftzufuhrumfangsleitung (4) umfasst, die alle Brennstoffzufuhrleitungen und die zentrale Luftzufuhrleitung umgibt und die durch ein inneres Rohr (5), das sich entlang der Achse (2) des Brenners (1) erstreckt, und ein äußeres Rohr (6), das zum inneren Rohr (5) koaxial ist, begrenzt wird, wobei die beiden Rohre (5, 6) zueinander axial translatorisch beweglich sind in der Axialrichtung zwischen einer Öffnungsposition und einer Schließposition, wobei ein erstes der beiden Rohre (5, 6) in der Nähe seines stromabwärtigen Endes (7) einen ringförmigen Flansch (8) trägt, der Nuten (9) umfasst, die sich im Wesentlichen in der Axialrichtung des Rohrs erstrecken, dadurch gekennzeichnet, dass das zweite Rohr einen Schließteil (13, 15) umfasst, der so angeordnet ist, dass, wenn sich die beiden Rohre (5, 6) in der Öffnungsposition befinden, der Abstand, der den Schließteil (13, 15) vom Flansch (8) radial trennt, ein beträchtliches Durchströmen von Luft zwischen den beiden Elementen (8, 13) gestattet und, wenn sich die beiden Rohre (5, 6) in der Schließposition befinden, dieser Abstand im Wesentlichen null beträgt, so dass fast die gesamte Luft durch die Nuten (9) strömt.
  2. Brenner (1) nach Anspruch 1, dadurch gekennzeichnet, dass die Nuten (9) winkelförmig gleichmäßig verteilt sind.
  3. Brenner (1) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Nuten (9) über ihre gesamte Länge hinweg radial offen sind.
  4. Brenner (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der ringförmige Flansch (8) ein stromaufwärtiges Ende (12) aufweist, das eine radiale Neigung in Richtung einer Annäherung an das zweite Rohr (6) beim Verlauf von stromaufwärts nach stromabwärts aufweist.
  5. Brenner (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sich der ringförmige Flansch (8) am stromabwärtigen Ende (7) des ersten Rohrs (5) befindet.
  6. Brenner (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Schließteil (13) eine radiale Neigung in Richtung einer Beabstandung vom ersten Rohr (5) beim Verlauf von stromaufwärts zu stromabwärts aufweist und im Wesentlichen am Flansch (8) anliegt, wenn sich die beiden Rohre (5, 6) in der Schließposition befinden, so dass der Luftströmungsbereich auf lediglich die Nuten (9) beschränkt wird.
  7. Brenner (1) nach Anspruch 6, dadurch gekennzeichnet, dass der Schließteil (13) eine Kegelfläche ist, deren Halbwinkel am Scheitel im Wesentlichen 10° beträgt.
  8. Brenner (1) nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Schließteil (15) einerseits eine erste Fläche, die eine radiale Neigung in Richtung einer Annäherung an das erste Rohr (5) beim Verlauf von stromaufwärts nach stromabwärts aufweist, und andererseits stromabwärts der ersten Fläche (16) eine zweite zylindrische Fläche (17) umfasst, die einen Durchmesser aufweist, der im Wesentlichen dem Außendurchmesser des Flanschs (8) entspricht.
  9. Brenner nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Axialstromluftzufuhrleitung (4) eine Tangentialstromprimärluftzufuhrumfangsleitung (3) umfasst.
EP08160478.7A 2007-07-20 2008-07-16 Brenner Not-in-force EP2017529B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0705305A FR2919043A1 (fr) 2007-07-20 2007-07-20 Bruleur comportant une conduite annulaire d'alimentation en air

Publications (2)

Publication Number Publication Date
EP2017529A1 EP2017529A1 (de) 2009-01-21
EP2017529B1 true EP2017529B1 (de) 2015-11-18

Family

ID=39111354

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08160478.7A Not-in-force EP2017529B1 (de) 2007-07-20 2008-07-16 Brenner

Country Status (3)

Country Link
EP (1) EP2017529B1 (de)
CN (1) CN101349426A (de)
FR (1) FR2919043A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3024765B1 (fr) * 2014-08-06 2016-07-29 Fives Pillard Bruleur a injection d'air ou de gaz ajustable
CN108730970A (zh) * 2017-04-15 2018-11-02 南京建安机械制造有限公司 五通道煤粉燃烧器

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1260443A (en) * 1970-02-10 1972-01-19 Todd Comb Ltd A fuel burner assembly
US4199934A (en) * 1975-07-24 1980-04-29 Daimler-Benz Aktiengesellschaft Combustion chamber, especially for gas turbines
DE3933050C2 (de) * 1989-10-04 2000-06-15 Pillard Feuerungen Gmbh Verfahren zum Betreiben eines Brenners für Drehrohröfen und Brenner hierfür
US5235813A (en) * 1990-12-24 1993-08-17 United Technologies Corporation Mechanism for controlling the rate of mixing in combusting flows
FR2780489B1 (fr) * 1998-06-24 2000-09-08 Pillard Chauffage Perfectionnement aux bruleurs comportant au moins trois conduits d'alimentation en air, dont deux axial et en rotation, concentriques avec au moins une alimentation-en combustible, et un stabilisateur central
EP1495263B1 (de) * 2002-03-16 2015-04-29 ExxonMobil Chemical Patents Inc. Verbesserter brenner mit niedrigen nox-emissionen
FR2887597B1 (fr) * 2005-06-27 2010-04-30 Egci Pillard Conduite annulaire et bruleur comportant une telle conduite
FR2901852B1 (fr) * 2006-05-30 2010-10-22 Egci Pillard Conduite annulaire a double flux et bruleur comportant une telle conduite

Also Published As

Publication number Publication date
FR2919043A1 (fr) 2009-01-23
EP2017529A1 (de) 2009-01-21
CN101349426A (zh) 2009-01-21

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