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EP1725811B1 - Bruleur de four rotatif - Google Patents

Bruleur de four rotatif Download PDF

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Publication number
EP1725811B1
EP1725811B1 EP05707659A EP05707659A EP1725811B1 EP 1725811 B1 EP1725811 B1 EP 1725811B1 EP 05707659 A EP05707659 A EP 05707659A EP 05707659 A EP05707659 A EP 05707659A EP 1725811 B1 EP1725811 B1 EP 1725811B1
Authority
EP
European Patent Office
Prior art keywords
burner
guide
control body
swirl
guide vanes
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.)
Expired - Lifetime
Application number
EP05707659A
Other languages
German (de)
English (en)
Other versions
EP1725811A1 (fr
Inventor
Ernst Schröder
Karin Kluthe
Martin Depka
Alexander Knoch
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.)
KHD Humboldt Wedag AG
Original Assignee
KHD Humboldt Wedag AG
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 KHD Humboldt Wedag AG filed Critical KHD Humboldt Wedag AG
Publication of EP1725811A1 publication Critical patent/EP1725811A1/fr
Application granted granted Critical
Publication of EP1725811B1 publication Critical patent/EP1725811B1/fr
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
    • F23D1/00—Burners for combustion of pulverulent fuel
    • F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
    • 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
    • F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
    • F23C7/004—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes
    • F23C7/006—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes adjustable

Definitions

  • the invention relates to a burner for a rotary kiln, with an annularly arranged channel for the pneumatic transport of fine solid fuel through a nozzle orifice and with a concentrically arranged combustion air duct, at the outlet of a swirl generator is arranged, which has distributed around the circumference vanes.
  • calcined cement raw meal is fired into cement clinker in the sintering zone of a rotary kiln.
  • a long burner lance is inserted into the kiln outlet end through the stationary kiln outlet casing, at the mouth of which the combustibles introduced into the lance burn to form a burner flame.
  • solid fuels in particular pulverized coal, but also pneumatically transportable waste fuels, are increasingly being used as secondary fuels.
  • Known rotary kiln burners are usually designed as so-called three-channel burners (publication " KHD Symposium '90 "volume 2 page 98 with the essay “Operating experience with the KHD PYRO-JET burner”), with at least three mutually concentric channels, that is, through the middle burner channel flows as fuel, the pneumatically transported pulverized coal, which exits through an annular gap, wherein the outflowing coal dust of radially inner as well as surrounded by radially outer primary air as combustion air.
  • the radially outer air also called jet air
  • the radially outer air is divided into a plurality of individual high-speed primary air jets by means of a plurality arranged in the annular jet air duct, which generate a negative pressure area in their environment, that is, the many high-speed primary air jets serve as propulsion jets according to the injector which the large mass of the rotary kiln burner surrounding, practically dormant hot secondary air of z. B. is sucked inwards towards the core of the burner flame about 1000 ° C, where intensive mixing of the hot secondary air takes place with the exiting through the annular nozzle coal dust, which is to burn quickly and completely to form a short hot flame.
  • the primary air duct of the known rotary kiln burner located radially inside the coal dust channel has a swirl generator at its orifice, so that the primary air emerging there receives a rotational component and is also called swirl air, swirl air or even radial air.
  • the swirl generator spirally arranged Heilausströmungskanäle on, or at the mouth of the swirl air duct of the rotary kiln burner distributed around the circumference wing-like vanes are arranged as these z.
  • All these known swirl generators are not adjustable, certainly not during operation of the rotary kiln, so that it can not be responded to different fuels used and changing flame shapes by changing the intensity and / or in particular the outflow angle of the swirl air.
  • a burner is described with adjustable vanes for generating swirling air, in which the swirl air blades can be adjusted with a complex, the combustion chamber facing mechanism.
  • the adjustment mechanism is suitable for use in burners with comparatively low energy conversion, but not for use in rotary kilns because the mechanism could easily take damage in the harsh conditions of a rotary kiln.
  • a swirl generator in which the guide vanes can be adjusted by a combustion mechanism facing the combustion chamber.
  • This adjusting mechanism is also suitable for use in burners with comparatively low energy conversion because-as described above-the sliding guide with its movable parts facing the combustion chamber could easily be damaged in the harsh conditions of a rotary kiln.
  • the invention has for its object to provide a rotary kiln burner, in particular for fine solid fuel with a swirl air duct with swirl generator, which is in order to change the outflow angle of the swirl air and change the flame shape in response to different types of fuel easily and yet effectively controlled even during the rotary kiln operation simplifies the mechanics of the burner over the prior art and at the same time the moving parts are to be removed from the combustion chamber.
  • the guide vanes of the swirl generator are set at an angle to the swirl air duct axis, and the guide vanes are each rotatable or rotatable on a radial guide blade limiter side in a ring section of the swirl air duct pivoted. At their respective opposite radial vane boundary side, the vanes each have a projecting guide pin z. B. ball pin, wherein the guide pins engage in a respective guide groove of a swirl air duct arranged annular control body.
  • the guide vanes distributed around the circumference of the swirl generator are designed as one-armed levers in that the guide pins of the guide vanes are each arranged at a distance from the pivot axis of the guide vanes.
  • Either the rotary or pivot axes of the vanes are at their radially outer side and they are pivotally mounted in the radially outer boundary tube of the swirl air duct and the guide pin and the grooved control body are located on the radially inner boundary tube side of the swirl air duct, or vice versa.
  • the guide grooves distributed around the circumference of the control body can be approximately helically shaped. Then, the control body is displaced axially, and in this way the vanes are pivoted. Or the distributed around the circumference of the control body guide grooves are deformed approximately axially rectilinear. Then, the control body is rotated, and in this way, the vanes of the swirl generator are pivoted. It is also possible to form the distributed around the circumference of the control body guide grooves over the circumference seen in position and geometry differently, z. B. in the helical position with mutually different angles to the burner longitudinal axis.
  • Fig. 1 shows the complete burner lance 7 with the introduction of coal dust 8, which burns after emerging from the burner orifice 9 to form a flame in the rotary kiln.
  • the rotary kiln burner according to the invention is a three-channel burner with a ring-shaped channel 10 for the pneumatic transport of fine-grained solid fuel such.
  • the coal dust channel 10 is concentrically surrounded by both a radially outwardly disposed combustion air duct and by a radially inner combustion air duct, these combustion air streams forming the primary air for the burner.
  • the radially outer primary air also called jet air, occurs at high speed in the form of jet streams of individual distributed around the circumference of the burner mouth arranged Burner nozzles 11 off.
  • the jet air jets are able to as much as possible surrounding the rotary kiln burner in the rotary kiln hot secondary air of z. B. 1000 ° C in the core of the burner flame for the purpose of rapid and complete coal dust combustion suck.
  • the concentrically disposed within the coal dust channel 10 further primary air duct is equipped at its mouth with a swirl generator with distributed around the circumference obliquely directed to the air flow guide vanes 12, 13, etc., so that this radially inner primary air duct is also called swirl air duct 14.
  • this radially inner primary air duct is also called swirl air duct 14.
  • In the center of the burner mouth can still be arranged at least one pilot burner.
  • the guide vanes 12, 13, etc. in the swirl air duct 14 even during operation of the rotary kiln are adjustable by the vanes in the embodiment of FIGS. 2 and 3 each having a projecting cylindrical pivot pin 15 at its radially outer sides as a pivot axis, wherein the pivot pins are mounted in circumferentially spaced holes of a retaining ring 16, which by means of fastening elements such. B. bolt 17 from the burner mouth ago to the front side of the swirl air duct 14 outside limiting tube is mountable.
  • the guide vanes 12, 13, etc. on their opposite side of the pivot pin 15 each have a projecting guide pin 18, z. B. ball stud, wherein the guide pins 18 each engage in a guide groove 19, 20, etc., which are distributed around the outer periphery of an annular control body 21.
  • This control body 21 is in Fig. 4 out drawn.
  • the axial displacement of the control body 21 may, as in Fig. 1 shown by axial displacement of the control body 21 supporting the central tube 22, which is sensitive axially adjustable by means of a Verschiebegestfites 23 by means of a Spindelhubelements 24.
  • the sealing of the swirl air channel 14 is ensured by means of a compensator 25 between the axially displaceable central tube 22 and the fixed pipe connection.
  • the pivot angle set on the guide vanes 12, 13 can be recognized by scales on the adjustment drive or by electrical signal feedback.
  • the control body 21 a is not axially displaced, but rotated about its longitudinal axis, z. B. in that in the pinion 26 of the control body 21 a not shown located outside of the rotary kiln rotary drive engages to adjust in this way the vanes 12, 13, etc. of the swirl generator.
  • the invention is also applicable to retrofitting already existing rotary kiln burner. For this purpose, except for the cultivation of the adjusting mechanism at the cold end of the burner lance only the swirl system and possibly also the pulverized coal nozzle must be replaced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Drying Of Solid Materials (AREA)

Claims (6)

  1. Brûleur pour un four tubulaire rotatif, comprenant un canal (10) de forme annulaire pour le transport pneumatique de combustible solide à grains fins à travers une embouchure de buse et comprenant un canal d'air de tourbillonnement (14) disposé concentriquement à celui-ci, au débouchement duquel est disposé un générateur de tourbillons, qui présente des aubes directrices (12, 13) réparties sur la périphérie,
    a) les aubes directrices (12, 13) du générateur de tourbillons étant inclinées obliquement par rapport à l'axe du canal d'air de tourbillonnement,
    b) les aubes directrices (12, 13) étant montées de manière pivotante (15) à chaque fois sur un premier côté de limitation d'aube directrice radial dans une bague de fixation (16) montée fixement du canal d'air de tourbillonnement (14), et
    c) les aubes directrices (12, 13) présentant sur leur deuxième côté de limitation d'aube directrice radial, opposé à chaque fois au premier côté de limitation d'aube directrice, un tourillon de guidage (18) respectif saillant,
    caractérisé en ce que
    d) les tourillons de guidage (18) viennent en prise à chaque fois dans l'une des rainures de guidage (19, 20, 19a, 20a) réparties autour de la périphérie d'un corps de commande de forme annulaire (21, 21a) ; et
    e) en ce que par déplacement axial et/ou rotation du corps de commande (21, 21a), les aubes directrices (12, 13) pivotent autour d'un axe radial du canal d'air de tourbillonnement (14).
  2. Brûleur selon la revendication 1, caractérisé en ce que les aubes directrices (12, 13) du générateur de tourbillons sont réalisées sous forme de levier à un bras, leurs tourillons de guidage (18) étant disposés à distance de l'axe de pivotement (15) des aubes directrices.
  3. Brûleur selon la revendication 2, caractérisé en ce que les rainures de guidage (19, 20) réparties sur la périphérie du corps de commande (21) sont formées sous forme hélicoïdale et le corps de commande (21) est déplaçable axialement.
  4. Brûleur selon la revendication 2, caractérisé en ce que les rainures de guidage (19a, 20a) réparties sur la périphérie du corps de commande (21a) sont formées sous forme approximativement rectiligne axialement et le corps de commande (12a) est capable de tourner.
  5. Brûleur selon la revendication 1 ou 2, caractérisé en ce que les aubes directrices (12, 13) présentent en tant qu'axe de pivotement à chaque fois un tourillon d'articulation (15) cylindrique saillant, ces tourillons d'articulation étant montés dans des alésages répartis sur la périphérie de la bague de fixation (16) qui peut être montée au moyen d'éléments de fixation (17) depuis l'embouchure du brûleur sur le côté frontal d'un des tubes limitant le canal d'air de tourbillonnement (14).
  6. Lance de brûleur (7) comprenant un brûleur selon l'une quelconque des revendications 1 à 5, caractérisée en ce qu'un mécanisme de réglage (24) pour le réglage du tube central (22) de la lance de brûleur (7) portant le corps de commande (21, 21a) est disposé sur l'extrémité froide de la lance de brûleur (7).
EP05707659A 2004-03-02 2005-02-28 Bruleur de four rotatif Expired - Lifetime EP1725811B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004010063A DE102004010063A1 (de) 2004-03-02 2004-03-02 Drehofenbrenner
PCT/EP2005/002099 WO2005085707A1 (fr) 2004-03-02 2005-02-28 Bruleur de four rotatif

Publications (2)

Publication Number Publication Date
EP1725811A1 EP1725811A1 (fr) 2006-11-29
EP1725811B1 true EP1725811B1 (fr) 2011-08-03

Family

ID=34877236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05707659A Expired - Lifetime EP1725811B1 (fr) 2004-03-02 2005-02-28 Bruleur de four rotatif

Country Status (6)

Country Link
EP (1) EP1725811B1 (fr)
AT (1) ATE519073T1 (fr)
BR (1) BRPI0508293A (fr)
DE (1) DE102004010063A1 (fr)
DK (1) DK1725811T3 (fr)
WO (1) WO2005085707A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10724735B2 (en) 2017-12-14 2020-07-28 Midea Group Co., Ltd. Method and apparatus for distributing heat from a burner
US10739009B2 (en) 2017-12-14 2020-08-11 Midea Group Co., Ltd. Method and apparatus for distributing heat from a burner

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005053820A1 (de) * 2005-11-11 2007-05-16 Khd Humboldt Wedag Gmbh Verfahren und Einrichtung zur Überwachung des Zustandes des Schutzmantels eines Drehofenbrenners
DE102005053819A1 (de) * 2005-11-11 2007-05-16 Khd Humboldt Wedag Gmbh Drehofenbrenner
DE102006060869A1 (de) * 2006-12-22 2008-06-26 Khd Humboldt Wedag Gmbh Verfahren zur Regelung des Betriebes eines Drehofenbrenners
DE102006060867B4 (de) 2006-12-22 2020-07-02 Khd Humboldt Wedag Gmbh Drehofenbrenner
CN104696953A (zh) * 2013-12-07 2015-06-10 黄冈圣嘉高新机电设备有限公司 叶片角度可调节式四通道旋流煤粉燃烧器
US11209171B1 (en) 2020-06-30 2021-12-28 Midea Group Co., Ltd. Gas burner lighting via rotation
AT524888A1 (de) * 2021-03-23 2022-10-15 Mme Eng E U Ultra-Low-NOx-Brenner

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2041535A (en) * 1930-12-13 1936-05-19 Foster Wheeler Corp Burner
US3746499A (en) * 1970-07-06 1973-07-17 Exxon Research Engineering Co Staged air burner with swirling auxiliary air flow
GB1410923A (en) * 1971-12-15 1975-10-22 Hotwork Ltd Fluid fuel burners
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
US5092762A (en) * 1991-01-15 1992-03-03 Industrial Technology Research Institute Radial vane swirl generator
GB2253476B (en) * 1991-03-08 1994-09-07 Ind Tech Res Inst A swirl generator with improved radial vanes
WO1994021963A1 (fr) * 1993-03-25 1994-09-29 Anton Novotny Dispositif de regulation du tourbillonnement de l'air et des gaz de combustion dans des bruleurs
DE4319363A1 (de) * 1993-06-11 1994-12-15 Kloeckner Humboldt Deutz Ag Drehofenbrenner
US5697306A (en) * 1997-01-28 1997-12-16 The Babcock & Wilcox Company Low NOx short flame burner with control of primary air/fuel ratio for NOx reduction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10724735B2 (en) 2017-12-14 2020-07-28 Midea Group Co., Ltd. Method and apparatus for distributing heat from a burner
US10739009B2 (en) 2017-12-14 2020-08-11 Midea Group Co., Ltd. Method and apparatus for distributing heat from a burner

Also Published As

Publication number Publication date
DE102004010063A1 (de) 2005-09-22
ATE519073T1 (de) 2011-08-15
EP1725811A1 (fr) 2006-11-29
DK1725811T3 (da) 2011-11-21
WO2005085707A1 (fr) 2005-09-15
BRPI0508293A (pt) 2007-07-31

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