EP2102549B1 - Brûleur de four rotatif - Google Patents

Brûleur de four rotatif Download PDF

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Publication number
EP2102549B1
EP2102549B1 EP07856970.4A EP07856970A EP2102549B1 EP 2102549 B1 EP2102549 B1 EP 2102549B1 EP 07856970 A EP07856970 A EP 07856970A EP 2102549 B1 EP2102549 B1 EP 2102549B1
Authority
EP
European Patent Office
Prior art keywords
burner
air
rotary
tube
expansion chamber
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.)
Active
Application number
EP07856970.4A
Other languages
German (de)
English (en)
Other versions
EP2102549A1 (fr
Inventor
Ernst Schröder
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
Priority to PL07856970T priority Critical patent/PL2102549T3/pl
Publication of EP2102549A1 publication Critical patent/EP2102549A1/fr
Application granted granted Critical
Publication of EP2102549B1 publication Critical patent/EP2102549B1/fr
Active 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
    • F23D—BURNERS
    • F23D1/00—Burners for combustion of 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 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
    • F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
    • 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
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/20—Incineration of waste; Incinerator constructions; Details, accessories or control therefor having rotating or oscillating drums
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/12—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of plastics, e.g. rubber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2201/00—Burners adapted for particulate solid or pulverulent fuels
    • F23D2201/10—Nozzle tips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G2900/00—Special features of, or arrangements for incinerators
    • F23G2900/54402—Injecting fluid waste into incinerator

Definitions

  • the invention relates to a rotary kiln burner with an annularly disposed within a combustion liner tube channel for transporting a primary fuel, which flows through an annular gap with low outwardly diverging angle from the rotary kiln burner and is surrounded by both a radially inward and radially outwardly located combustion air duct, both Air streams from the combustion air ducts form the primary air for the rotary kiln burner and wherein the radially inner combustion air duct is equipped at its mouth with a swirl generator and the radially outer combustion air duct feeds primary air axially parallel to a burner flame.
  • 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.
  • clinker mineral formation in the rotary kiln it depends on the correct temperature, length and other design of the burner flame.
  • Known rotary kiln burners are often designed as so-called three-channel burners (eg. DE 43 19 363 A1 ), with at least three mutually concentric channels, ie through the middle burner channel flows as fuel, the pneumatically transported pulverized coal, which exits through an annular gap, the outflowing coal dust is surrounded by radially inner as well as radially outer primary air as combustion air.
  • the radially outer air also called jet air
  • jet air is subdivided into many individual high-speed primary air jets by means of a plurality of individual jets arranged in the annular jet air duct which generate a negative pressure area in their vicinity, ie the many high-speed primary jets serve as propulsion jets according to the injector principle the large mass of the rotary kiln burner surrounding, practically stationary 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 invention has for its object to provide a rotary kiln burner, in which the amount of usable low-cost secondary fuels to be used can increase as an energy source and influence on the design of the burner flame can be taken.
  • an expansion chamber open towards the burner mouth is arranged in front of the mouth of the at least one tube for blowing out the lumpy secondary fuels in the burner with an enlarged cross-section compared to the secondary fuel pipe. That is, the pneumatically transported via one or more injection tubes blown particulate secondary fuels first enter into an expansion chamber expanded in cross-section, from which then the with Prolonged residence time pre-oxidized particulate secondary fuels at the burner mouth at a significantly reduced speed in the flame cone of the burner flame occur. The risk of particles of the secondary fuel jet passing unburned past the burner flame is minimized. In any case, in the burner according to the invention, the amount of usable low-cost secondary fuels as energy carriers can be significantly increased and a portion of the relatively expensive primary fuel can be saved.
  • the axial length of the expansion chamber is variable by axial displacement of the secondary fuel tube (s) during burner operation.
  • the volume of the expansion chamber, the pre-oxidation of lumpy secondary fuels in the expansion chamber, the flow rate reduction in the expansion chamber and the spatial outlet angle of the secondary fuel jet influence are taken in such a way that the lumpy secondary fuels within the burner flame with the desired Burn out the flame configuration.
  • a separate swirl generator can be arranged at the outlet of the / the secondary fuel tubes in the expansion chamber for the rotation of the secondary fuels already in the expansion chamber.
  • the swirl generator can consist of a component attached to the outlet of the secondary fuel tube and through which the secondary fuels flow, which has circumferentially distributed swirl slots through which additional primary air blown through the burner flows, the latter having its angular momentum in the expansion chamber transmits to the blown-off secondary fuels.
  • the rotary kiln burner according to the invention is first a three-channel burner with a ring-shaped channel 10 for the pneumatic transport of a fine-grained solid fuel such.
  • a fine-grained solid fuel such as coal dust, which flows through an annular gap nozzle 11 with a small outwardly diverging angle.
  • the coal dust channel 10 is concentrically surrounded both by a radially inwardly and radially outwardly located combustion air channel, these combustion air streams forming the primary air for the burner.
  • the concentrically disposed within the coal dust channel 10 primary air channel 12 is at its mouth with a swirl generator 13 z. B. equipped with spiral slots, so that this radially inner primary air duct is also called swirl air duct.
  • the radially outer primary air also called jet air
  • jet air is distributed over axis-parallel distributed about the burner axis jet air tubes 14 and it occurs at high speed in the form of jets from individual distributed around the circumference of the burner mouth arranged jet air nozzles 15, z. B. 12 pieces.
  • the high-speed jet air jets which are capable of as much as possible of the rotary kiln burner in the rotary kiln surrounding hot secondary air of z. B. 1000 ° C in the core of the burner flame in order to absorb quick and complete fuel combustion, should meet the fuel cone or the burner flame at an optimal location in order to achieve great flame turbulence.
  • Cooling air is blown through the burner in the annular space between the outer combustion support tube 16 and the pulverulent coal tube 17 concentrically arranged, which flows out at the burner mouth in the region between the adjacent jet air nozzles 15, where then the cooling air heated at the burner lance forms a portion of the primary air.
  • the annular cooling air channel is designated by the reference numeral 18.
  • the combustion support tube 16 is in any case in the front burner lance region by an applied in Fig. 2 Protected refractory mass not shown.
  • a central pilot burner in which in a conventional burner, a central pilot burner can be used, according to the embodiment of Fig. 2 z. B.
  • an expansion chamber 21 open toward the burner mouth is arranged in the burner with an enlarged cross-section compared to the tube cross-sections.
  • the lumped secondary fuels 25 blown in via the tubes 19, 20 are first allowed to exit into the expansion chamber 21, from which the lumped secondary fuels preheated there with prolonged residence time then enter the flame cone of the burner flame at a markedly reduced velocity at the burner mouth. while minimizing the risk of the lumps of secondary fuel particles moving past the flame.
  • the amount of usable low-priced particulate secondary fuels such.
  • waste plastic granules significantly increase as energy and part of the relatively expensive primary fuel, eg. B. save coal dust.
  • the mixing of the blown lumped secondary fuels into the burner flame and their design can be further influenced by the fact that at the mouth of the secondary fuel tubes 19, 20 in the expansion chamber 21 a separate swirl generator 23 is arranged for the rotation of the secondary fuels already in the expansion chamber 21 Fig. 2 consists of this swirl generator 23 from one of the outlets of the secondary fuel tubes 19, 20 and flowed through by the secondary fuel component having circumferentially distributed swirl slots, which are flowed through by additional blown by the burner primary air, which introduced via the annular channel 24 in the burner is and transfers its angular momentum in the expansion chamber 21 to the blown lumped secondary fuels.
  • This measure also contributes to the fact that the relatively large amount of lumped secondary fuels to be used does not undesirably pass the burner flame in the rotary kiln burner according to the invention but burns out in the burner flame.
  • Fig. 1 In the schematic representation of Fig. 1 are introduced into the rotary kiln burner according to the invention lumped secondary fuels as in Fig. 2 symbolized by the big arrow 25. Further, there is shown schematically that the desired distance 26 of the beginning of the flame root 27 to the burner mouth in a range of about 300 to about 800 mm also with the help of the adjustable axial length of the expansion chamber 21 and the angular momentum of the blown secondary fuels and possibly in dependence on other parameters even during burner operation is adjustable.
  • the rotary kiln burner according to the invention is suitable for the proportion of used relatively expensive primary fuel z.
  • coal dust as solid fuel or oil and reduce the proportion of inexpensive alternative fuels such as lumpy waste fuels such.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Incineration Of Waste (AREA)

Claims (3)

  1. Brûleur de four rotatif, comprenant
    - un canal (10) disposé sous forme annulaire à l'intérieur d'un tube porteur de brûleur (16), pour le transport d'un combustible primaire,
    - qui s'échappe hors du brûleur de four rotatif à travers une buse à fente annulaire (11) suivant un petit angle divergeant vers l'extérieur, et
    - qui est entouré concentriquement à la fois par un canal d'air comburant radialement interne
    - et par un canal d'air comburant radialement externe,
    - les deux flux d'air sortant des canaux d'air comburant (12, 14) formant l'air primaire pour le brûleur de four rotatif et
    - le canal d'air comburant (12) situé radialement à l'intérieur étant muni au niveau de son embouchure de sortie d'un générateur de tourbillons (13) et
    - le canal d'air comburant situé radialement à l'extérieur acheminant de l'air primaire avec son axe parallèle à une flamme du brûleur, l'air primaire étant acheminé par le biais de tubes à jets d'air (14) répartis avec leurs axes parallèles autour de l'axe du brûleur, et sortant à grande vitesse sous forme de jets de buses hors de buses à jet d'air individuelles (15) réparties sur la périphérie de l'embouchure du brûleur,
    caractérisé en ce que
    - dans un tube central du brûleur de four rotatif, au moins un tube (19, 20) est prévu pour le transport pneumatique et le soufflage de combustibles secondaires en morceaux (25) et
    - lequel débouche dans une chambre d'expansion (21) de section transversale élargie par rapport à la section transversale de l'au moins un tube (19, 20), et
    - en ce que la longueur axiale et le volume de la chambre d'expansion (21) pendant le fonctionnement du brûleur de four rotatif peuvent être variés par déplacement axial du/des tubes de combustible secondaire (19, 20),
    - les combustibles secondaires en morceaux (25), soufflés au moins hors d'un tube (19, 20), entrant sous l'effet de la chambre d'expansion (21) à une vitesse nettement réduite dans le cône de la flamme de brûleur.
  2. Brûleur de four rotatif selon la revendication 1, caractérisé en ce qu'au niveau de l'embouchure de sortie de l'au moins un tube (19, 20) dans la chambre d'expansion (21) est disposé un générateur de tourbillons (23) pour mettre en circulation les combustibles secondaires déjà dans la chambre d'expansion (21).
  3. Brûleur de four rotatif selon la revendication 2, caractérisé en ce que le générateur de tourbillons (23) se compose d'un composant placé au niveau des embouchures de sortie de l'au moins un tube (19, 20) et parcouru par les combustibles secondaires, qui présente des fentes de tourbillonnement réparties sur la périphérie, qui sont parcourues par de l'air primaire supplémentaire (24) soufflé par le brûleur, qui transmet son impulsion de rotation dans la chambre d'expansion (21) aux combustibles secondaires soufflés.
EP07856970.4A 2006-12-22 2007-12-20 Brûleur de four rotatif Active EP2102549B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07856970T PL2102549T3 (pl) 2006-12-22 2007-12-20 Palnik pieca obrotowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006060867.4A DE102006060867B4 (de) 2006-12-22 2006-12-22 Drehofenbrenner
PCT/EP2007/011247 WO2008077576A1 (fr) 2006-12-22 2007-12-20 Brûleur de four rotatif

Publications (2)

Publication Number Publication Date
EP2102549A1 EP2102549A1 (fr) 2009-09-23
EP2102549B1 true EP2102549B1 (fr) 2016-12-07

Family

ID=39278331

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07856970.4A Active EP2102549B1 (fr) 2006-12-22 2007-12-20 Brûleur de four rotatif

Country Status (5)

Country Link
US (1) US8393893B2 (fr)
EP (1) EP2102549B1 (fr)
DE (1) DE102006060867B4 (fr)
PL (1) PL2102549T3 (fr)
WO (1) WO2008077576A1 (fr)

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EP2312215A1 (fr) * 2008-10-01 2011-04-20 Siemens Aktiengesellschaft Brûleur et procédé de fonctionnement d'un brûleur
DE102010061496A1 (de) * 2010-12-22 2012-06-28 Thyssenkrupp Polysius Ag Rohrförmiger Brenner sowie Verfahren zum Betreiben eines rohrförmigen Brenners
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DE102013004016A1 (de) * 2013-03-08 2014-09-11 Messer Austria Gmbh Mehrstoffbrenner und Verfahren zum Beheizen eines Ofenraums
WO2017023530A1 (fr) * 2015-07-31 2017-02-09 Nuvera Fuel Cells, LLC Ensemble brûleur à faible émission de nox
US20190113225A1 (en) * 2016-05-11 2019-04-18 Dynamis Engenharia E Comércio Ltda. Method to Enhance Burner Efficiency and Burner
CN106361121B (zh) * 2016-11-02 2018-01-05 吉林省福泰厨具有限公司 一种无烟焚烧炉
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IL266905B2 (en) * 2019-05-27 2024-04-01 Babcock Power Services Inc Direct ignition burners with dual fuel
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KR102214747B1 (ko) * 2019-08-14 2021-02-10 다이헤이요 세멘토 가부시키가이샤 가연성 폐기물 분사장치 및 그 운전방법
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Also Published As

Publication number Publication date
DE102006060867A1 (de) 2008-06-26
WO2008077576A1 (fr) 2008-07-03
PL2102549T3 (pl) 2017-05-31
US20100019063A1 (en) 2010-01-28
EP2102549A1 (fr) 2009-09-23
DE102006060867B4 (de) 2020-07-02
US8393893B2 (en) 2013-03-12

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