EP0421903A2 - Verfahren zum Betreiben eines Brenners und Brenner für Drehofen - Google Patents

Verfahren zum Betreiben eines Brenners und Brenner für Drehofen Download PDF

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Publication number
EP0421903A2
EP0421903A2 EP90430017A EP90430017A EP0421903A2 EP 0421903 A2 EP0421903 A2 EP 0421903A2 EP 90430017 A EP90430017 A EP 90430017A EP 90430017 A EP90430017 A EP 90430017A EP 0421903 A2 EP0421903 A2 EP 0421903A2
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EP
European Patent Office
Prior art keywords
air
burner
axial
primary
annular
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
EP90430017A
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English (en)
French (fr)
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EP0421903A3 (en
EP0421903B1 (de
EP0421903B2 (de
Inventor
Werner Collenbusch
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.)
Entreprise Generale de Chauffage Industriel Pillard SA
Original Assignee
Entreprise Generale de Chauffage Industriel Pillard SA
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Application filed by Entreprise Generale de Chauffage Industriel Pillard SA filed Critical Entreprise Generale de Chauffage Industriel Pillard SA
Publication of EP0421903A2 publication Critical patent/EP0421903A2/de
Publication of EP0421903A3 publication Critical patent/EP0421903A3/fr
Publication of EP0421903B1 publication Critical patent/EP0421903B1/de
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Publication of EP0421903B2 publication Critical patent/EP0421903B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D17/00—Burners for combustion conjointly or alternatively of gaseous or liquid or pulverulent fuel
    • 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

Definitions

  • the present invention relates to a method of operating a burner for a rotary tube furnace, in which fuels and primary air are supplied concentrically.
  • the present invention also relates to a burner for a rotary tubular furnace equipped with a burner nozzle equipped with fuel and primary air ducts, which are arranged substantially concentric to each other, which primary air comprises air rotated and air flowing axially.
  • This known burner comprises, in addition to a central fuel supply for oil, another fuel supply arranged concentrically thereto for pulverized coal or any other similar fuel.
  • this arrival of solid fuel is between two primary air streams, one of which is the central stream, is rotated or swirled, that is to say that 'It has a tangential or peripheral direction component and the other of which, which is external, has an essentially axial flow speed in order to stabilize the flame which penetrates far into the rotary kiln.
  • the known burner has in its center an inlet for liquid fuel, generally oil.
  • the liquid fuel is sprayed into fine droplets by means of a nozzle and mixes after it leaves the central opening of the nozzle with primary air, which leaves the swirling air outlet opening, which opening is located radially around the central opening.
  • Known burners are usually operated with a proportion of primary air between 8% and 25% of the amount total combustion air.
  • the power of the burner is adjusted, that is to say the running speed by a respective reduction or increase in the fuel and the air supply in a determined adjustment range, in which the minimum adjustable speed to obtain a stable flame is approximately 20 to 25% of the maximum possible pace.
  • the object of the present invention is to provide a method of operating a burner for a rotary tubular oven and also a burner intended for the implementation of this method, which can operate with greater efficiency. low proportion of primary air and have a greater range for adjusting the operating speed.
  • this objective is achieved by providing directly around a central fuel supply duct and / or radially inside an annular fuel supply duct, a central dead zone, into which at most a reduced proportion of the primary combustion air is sent.
  • combustion begins at a greater distance in front of the center of the burner nozzle in comparison with known methods and burners.
  • the resulting flame has a central zone which extends forward and radially, in which practically no significant combustion of the fuel takes place. with the oxygen in the air.
  • a small flow of primary air in this central area which is however below 20% and preferably below 10% of the total primary air, prevents such a return of the products of the combustion, without providing a lot of oxygen which would decrease the central area rich in fuel.
  • a particular advantage of the reduced primary air consumption lies in the energy saving which is associated therewith for an equal performance in addition and also in the reduction of the proportion of nitrogen oxides in the combustion gases.
  • the objective of the invention is achieved in that the inlet openings for the swirling air and the axial air are located outside the openings for the supply of fuel and that the minimum radial distance from the center of the burner nozzle of the outlet ports for swirling air and axial air is at least twice the radius of a central orifice of the flame stabilizer.
  • the flame stabilizer has a flange which surrounds a central opening, and which is located in the center of the burner nozzle and preferably at the end of a nozzle holder for oil. It helps to form and stabilize the flame.
  • the flame stabilizer which overflows in the radial direction with respect to the central nozzle holder for the oil, thus provides a sufficient radial distance from the other annular openings for the primary air and / or other fuels which are located radially to the exterior of the flame stabilizer.
  • the radii of the central opening of the flame stabilizer and of the annular orifice for the innermost primary primary air stream are chosen so that the interior primary air stream is at a distance from the center of the nozzle which corresponds to at least twice the central opening of the flame stabilizer.
  • the central opening of the flame stabilizer corresponds substantially to the orifice of the nozzle of the central fuel conduit.
  • annular duct for solid and / or gaseous fuel disposed radially inside the primary air duct and radially outside. of the flame stabilizer.
  • primary air duct generally refers to the major part of the primary air which is supplied axially or in swirling form and must not include the small proportion of primary air (central air) which is supplied in the central area of the flame to prevent the return of combustion products.
  • openings are provided in the flame stabilizer, outside the central opening.
  • outlet opening of the axial air stream is as far outside as possible in the radial direction and that it also has an external edge which projects axially.
  • This outer ring contributes to a better constancy of the axial direction of the air, so that the combustion is improved and the flame is stabilized.
  • the annular ducts for the supply of primary air and / or solid or gaseous fuel have conical walls and these walls, as well as the concentric tubes connected to them, are axially displaceable relative to one another. the other, so that one can thus adjust the free cross section of the annular passage.
  • each duct is cylindrical in order to avoid a divergent flow parallel to the direction of the conical walls.
  • radial partitions intended for the axial orientation and for the circulation of the primary air in separate channels, which are arranged on a ring and which extend essentially in the axial direction.
  • partitions contribute to an additional axial orientation of the corresponding primary air and also increase the axial outlet speed, by the fact that they reduce the free cross section of the annular duct and that they divide it into a plurality of individual channels arranged all around a ring.
  • some of these channels are closed at least in part or are adjustable.
  • the partitions can for example be made wide enough in the peripheral direction so that they seal a channel at least in part or that they correspond to a closed channel.
  • the axial flow speed of the air is thus increased, which further contributes to stabilizing the flame.
  • the flame stabilizer is shifted rearward in an axial direction relative to the outlet openings of the main part of the primary air and solid or gaseous fuels. This can be achieved, for example, by attaching the flame stabilizer to the shell tube of the burner rod, which is axially displaceable, which tube is axially offset accordingly.
  • FIG. 1 represents a burner nozzle 1 placed at the end of an external burner tube 5 ⁇ , which is at the same time the external wall of a primary air duct 5 ′ which flows in the axial direction.
  • a tube 23 which is intended for supplying pulverized solid fuels, generally pulverized coal, is connected to the annular duct 15 ′ visible in FIGS. 3 and 5.
  • the concentric tubes 10 ⁇ , 11 ⁇ , 4 ⁇ , 5 ⁇ , 15 ⁇ and 19 ⁇ , which are engaged one in the other, have different lengths.
  • the tubes placed more inside extend axially towards the rear of the tubes situated more outside, so that, as can be seen in FIG. 1, it is possible to install adjustment devices 33, 34, which allow relative axial displacement of the tubes relative to each other.
  • the individual tubes are connected to each other by means of deformable bellows.
  • a control unit 30 is used for monitoring and controlling the primary air flows.
  • FIG. 2a represents a longitudinal section and FIG. 2b a partial front view of a burner nozzle which is designed to operate exclusively with a fuel, for example oil, arriving in the center.
  • a fuel for example oil
  • the flame stabilizer 3 which is located at the end of the tube 10 ′, which envelops the nozzle holder rod of the oil burner and which protrudes clearly in the radial direction relative to the opening of the nozzle guarantees that the opening 4 of the annular supply duct along 4 ′ opens at a significant radial distance from the central opening 2 of the flame stabilizer.
  • the radial distance D from the opening annular 4 relative to the axis of the burner is more than three times the radius d of the opening 2.
  • the corresponding distances are shown in Figure 4, in which the ratio D / d is even greater.
  • the zone situated essentially in front of the flame stabilizer constitutes a central dead zone 20, which is outside the central fuel stream and clearly inside the main inlet of primary air leaving the annular openings 4 and 5.
  • the flame stabilizer 3 has a hub in the form of a flange surrounding a central orifice 2. This hub has small openings 13.
  • the external face of the hub that is to say the front face, carries fins 12 which guide the weak proportion of primary air leaving the openings 13.
  • the external supply duct 5 ′ has at its end conical walls 6, which diverge outwards. In the area of these walls 6 are juxtaposed partitions 6 ′, which have a longitudinal section of triangular shape. These triangular walls are juxtaposed along a common side which is parallel to the axis of the burner and which is placed at the same radial distance from this axis as the external wall of the duct 5 ′.
  • the partitions 6 ′ may also have in the peripheral direction a width sufficient to correspond to the parts situated between the channels 5 shown in FIG. 2. These parts can also be considered as closed channels 5.
  • the supply duct 4 ′ comprises, in front of the conical end, a device 14 for swirling the air, that is to say for rotating around the axis of the burner.
  • This device consists essentially of air guide fins which are oriented obliquely to the axis of the burner.
  • the distance between the conical walls 7 of the conduit 4 ′ can be varied, so that the cross section of the conduit 4 ′ can thus be modified.
  • the end part of the duct 4 ′ in the region of the opening 4 is however again cylindrical in order to avoid a divergent flow of the swirling air leaving this opening.
  • edge 8 which projects forward in the axial direction, provides an axial direction of exit of the axial air stream.
  • FIG. 3 shows an embodiment of the burner nozzle which differs from the embodiment shown in FIG. 2 essentially by the presence of an additional duct 15 ′, for pulverulent solid fuels, which is located between the stabilizer of flame 3 and the swirling primary air duct 4 ′.
  • FIG. 4 represents an embodiment comprising, in place of the conduit 15 ′ for solid fuel, another conduit 19 ′ for a gaseous fuel, the end section of which can be conical, as for the conduit 4 ′, and which may also include a device for swirling the gas leaving this pipe.
  • the end section of the duct 19 ′ has a cylindrical shape in the region of the opening 19, in order to avoid a divergence of the gaseous fuel which leaves it.
  • FIG. 5 represents an embodiment which comprises both a supply pipe 15 ′ for solid fuels and a pipe 19 ′ for gaseous fuels.
  • Ducts 4 ′ and 5 ′ for the main proportion of primary air in the form of swirling air and air having a direction axial are arranged outside these two fuel conduits in the radial direction.
  • the internal edge of the opening 15, through which a significant part of the primary combustion air can enter the burner in the form of gas for transporting the solid fuel is at a distance D ′ from the axis of the burner, which is more than twice the radius d of the opening 2 of the flame stabilizer, so that in all cases, the center of the flame is guaranteed to have a sufficiently large dead zone, which provides the advantageous properties of the present invention.
  • a burner and a method for operating a burner intended for equipping a rotary tube furnace have been created, which allow a reduced proportion of primary air and a greater range of adjustment of the burner, which leads to lower energy consumption and a reduction in the formation of nitrogen oxides harmful to the environment.
EP90430017A 1989-10-04 1990-09-14 Verfahren zum Betreiben eines Brenners und Brenner für Drehofen Expired - Lifetime EP0421903B2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3933050A DE3933050C2 (de) 1989-10-04 1989-10-04 Verfahren zum Betreiben eines Brenners für Drehrohröfen und Brenner hierfür
DE3933050 1989-10-04

Publications (4)

Publication Number Publication Date
EP0421903A2 true EP0421903A2 (de) 1991-04-10
EP0421903A3 EP0421903A3 (en) 1991-10-02
EP0421903B1 EP0421903B1 (de) 1994-12-14
EP0421903B2 EP0421903B2 (de) 1998-09-23

Family

ID=6390771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90430017A Expired - Lifetime EP0421903B2 (de) 1989-10-04 1990-09-14 Verfahren zum Betreiben eines Brenners und Brenner für Drehofen

Country Status (6)

Country Link
EP (1) EP0421903B2 (de)
AT (1) ATE115706T1 (de)
CA (1) CA2026857A1 (de)
DE (1) DE3933050C2 (de)
DK (1) DK0421903T3 (de)
ES (1) ES2066179T5 (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2772887A1 (fr) 1997-12-24 1999-06-25 Pillard Chauffage Bruleur a faible emission d'oxyde d'azote avec circuit de gaz recycle
FR2772888A1 (fr) 1997-12-24 1999-06-25 Pillard Chauffage Amelioration aux bruleurs a combustible solide
EP0967434A1 (de) * 1998-06-24 1999-12-29 Entreprise Generale De Chauffage Industriel Pillard Brenner mit konzentrischer Luftzufuhr und zentral angeordnetem Stabilisator
EP1045203A1 (de) * 1999-04-16 2000-10-18 Entreprise Generale De Chauffage Industriel Pillard Mehrstoffbrenner
FR2803022A1 (fr) 1999-12-28 2001-06-29 Pillard Chauffage Procede d'installation d'alimentation en air d'un bruleur a combustible solide et pulverise
EP1136776A2 (de) * 2000-03-22 2001-09-26 ITALCEMENTI S.p.A. Vorrichtung zur Einspritzung von festen Brennstoffen in zerstäubter Form in einem Zementofen
EP1445535A1 (de) * 2003-02-06 2004-08-11 Entreprise Generale De Chauffage Industriel Pillard Brenner bestehend aus einem Flammenhalter und aus zumindest zwei zumindest ein Brennstoffrohr konzentrisch umgebende Rohre für axiale und wirbelnde Primärluft
US6780004B2 (en) * 2001-08-17 2004-08-24 Eisenmann Maschinenbau Kg Thermal post-combustion device
EP2017529A1 (de) * 2007-07-20 2009-01-21 Fives Pillard Brenner
FR2930626A1 (fr) * 2008-04-28 2009-10-30 Fives Pillard Sa Bruleur a points peripheriques d'injection d'air a flux axial
CN113203283A (zh) * 2021-04-26 2021-08-03 中国科学院力学研究所 一种水泥回转窑富氧风铲式窑头分级燃烧装置与方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19504667B4 (de) * 1995-02-13 2005-01-05 Schwenk Zement Kg Brenneranlage für Zementöfen
DK173204B1 (da) 1997-03-07 2000-03-13 F.L.Smidth & Co A/S r i en ovn Fremgangsmaede og braender til at indfoere braende
US6315551B1 (en) 2000-05-08 2001-11-13 Entreprise Generale De Chauffage Industriel Pillard Burners having at least three air feed ducts, including an axial air duct and a rotary air duct concentric with at least one fuel feed, and a central stabilizer
FR2823290B1 (fr) 2001-04-06 2006-08-18 Air Liquide Procede de combustion comportant des injections separees de combustible et d oxydant et ensemble bruleur pour la mise en oeuvre de ce procede
DE202008009650U1 (de) * 2008-07-18 2009-11-26 Ammann Schweiz Ag Mehrstoff-Brenner
CN106568081A (zh) * 2016-11-03 2017-04-19 扬州新建水泥技术装备有限公司 一种新型燃烧器

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062228A1 (de) * 1981-04-08 1982-10-13 Deutsche Babcock Werke Aktiengesellschaft Brenner für die Verbrennung mehrerer Brennstoffe

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7904137U1 (de) * 1979-02-15 1982-09-30 Pillard Feuerungen GmbH, 6204 Taunusstein Brenner fuer pulverfoermige oder feinkoernige feste brennstoffe und kombinationen fester, fluessiger und/oder gasfoermiger brennstoffe fuer weitmoeglichste einstellung der flammenform auch waehrend des betriebes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062228A1 (de) * 1981-04-08 1982-10-13 Deutsche Babcock Werke Aktiengesellschaft Brenner für die Verbrennung mehrerer Brennstoffe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZEMENT-KALK-GIPS vol. 32, no. 8, 1979, pages 386 - 389; ECKELMANN: 'BRûLEUR DE FOUR ROTATIF POUR COMBUSTIBLE SOLIDE ET COMBUSTIBLE MELANGES ' *

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2772887A1 (fr) 1997-12-24 1999-06-25 Pillard Chauffage Bruleur a faible emission d'oxyde d'azote avec circuit de gaz recycle
FR2772888A1 (fr) 1997-12-24 1999-06-25 Pillard Chauffage Amelioration aux bruleurs a combustible solide
EP0926434A1 (de) * 1997-12-24 1999-06-30 Entreprise Generale De Chauffage Industriel Pillard Stickoxidemissionsarmer Brenner mit Gasrückführung
EP0926435A1 (de) * 1997-12-24 1999-06-30 Entreprise Generale De Chauffage Industriel Pillard Verbesserung an Brennern für festen Brennstoff
EP0967434A1 (de) * 1998-06-24 1999-12-29 Entreprise Generale De Chauffage Industriel Pillard Brenner mit konzentrischer Luftzufuhr und zentral angeordnetem Stabilisator
FR2780489A1 (fr) 1998-06-24 1999-12-31 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
EP1045203A1 (de) * 1999-04-16 2000-10-18 Entreprise Generale De Chauffage Industriel Pillard Mehrstoffbrenner
FR2792393A1 (fr) 1999-04-16 2000-10-20 Pillard Chauffage Bruleur a plusieurs combustibles
FR2803022A1 (fr) 1999-12-28 2001-06-29 Pillard Chauffage Procede d'installation d'alimentation en air d'un bruleur a combustible solide et pulverise
EP1136776A3 (de) * 2000-03-22 2002-08-14 ITALCEMENTI S.p.A. Vorrichtung zur Einspritzung von festen Brennstoffen in zerstäubter Form in einem Zementofen
EP1136776A2 (de) * 2000-03-22 2001-09-26 ITALCEMENTI S.p.A. Vorrichtung zur Einspritzung von festen Brennstoffen in zerstäubter Form in einem Zementofen
US6780004B2 (en) * 2001-08-17 2004-08-24 Eisenmann Maschinenbau Kg Thermal post-combustion device
EP1445535A1 (de) * 2003-02-06 2004-08-11 Entreprise Generale De Chauffage Industriel Pillard Brenner bestehend aus einem Flammenhalter und aus zumindest zwei zumindest ein Brennstoffrohr konzentrisch umgebende Rohre für axiale und wirbelnde Primärluft
FR2851032A1 (fr) 2003-02-06 2004-08-13 Pillard Chauffage Perfectionnement au bruleur comportant un stabilisateur de flamme et au moins deux conduits d'air primaire, axial et en rotation, concentriques autour d'au moins une alimentation en combustible
EP2017529A1 (de) * 2007-07-20 2009-01-21 Fives Pillard Brenner
FR2930626A1 (fr) * 2008-04-28 2009-10-30 Fives Pillard Sa Bruleur a points peripheriques d'injection d'air a flux axial
WO2009138653A2 (fr) * 2008-04-28 2009-11-19 Fives Pillard Brûleur à points périphériques d'injection d'air à flux axial
WO2009138653A3 (fr) * 2008-04-28 2010-01-14 Fives Pillard Brûleur à points périphériques d'injection d'air à flux axial
CN102016412B (zh) * 2008-04-28 2012-07-18 法孚皮拉德公司 带有用于轴向流的周边空气注入点的燃烧器
CN113203283A (zh) * 2021-04-26 2021-08-03 中国科学院力学研究所 一种水泥回转窑富氧风铲式窑头分级燃烧装置与方法
CN113203283B (zh) * 2021-04-26 2022-04-22 中国科学院力学研究所 一种水泥回转窑富氧风铲式窑头分级燃烧装置与方法

Also Published As

Publication number Publication date
ES2066179T5 (es) 1999-01-01
CA2026857A1 (en) 1991-04-05
EP0421903A3 (en) 1991-10-02
DE3933050C2 (de) 2000-06-15
EP0421903B1 (de) 1994-12-14
ES2066179T3 (es) 1995-03-01
DE3933050A1 (de) 1991-04-11
EP0421903B2 (de) 1998-09-23
DK0421903T3 (da) 1995-05-15
ATE115706T1 (de) 1994-12-15

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