EP2087285A1 - Brûleur équipé de moyens de changement de la direction d'écoulement d'un combustible - Google Patents

Brûleur équipé de moyens de changement de la direction d'écoulement d'un combustible

Info

Publication number
EP2087285A1
EP2087285A1 EP07826814A EP07826814A EP2087285A1 EP 2087285 A1 EP2087285 A1 EP 2087285A1 EP 07826814 A EP07826814 A EP 07826814A EP 07826814 A EP07826814 A EP 07826814A EP 2087285 A1 EP2087285 A1 EP 2087285A1
Authority
EP
European Patent Office
Prior art keywords
burner
duct
fuel
main axis
outlet
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.)
Withdrawn
Application number
EP07826814A
Other languages
German (de)
English (en)
Other versions
EP2087285A4 (fr
Inventor
Ib Ohlsen
Lars Skaarup Jensen
Jens Peter Hansen
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.)
FLSmidth AS
Original Assignee
FLSmidth AS
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 FLSmidth AS filed Critical FLSmidth AS
Publication of EP2087285A1 publication Critical patent/EP2087285A1/fr
Publication of EP2087285A4 publication Critical patent/EP2087285A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
    • F23D14/22—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone with separate air and gas feed ducts, e.g. with ducts running parallel or crossing each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D99/00—Subject matter not provided for in other groups of this subclass
    • F27D99/0001—Heating elements or systems
    • F27D99/0033—Heating elements or systems using burners
    • 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
    • F23D2900/14—Special features of gas burners
    • F23D2900/14481—Burner nozzles incorporating flow adjusting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/20—Details, accessories or equipment specially adapted for rotary-drum furnaces
    • F27B7/34—Arrangements of heating devices

Definitions

  • Burner with means for changing the direction of fuel flow
  • the present invention relates to a burner for introducing solid, liquid or gaseous fuel to a burning zone of a kiln, such as a rotary kiln for manufacturing cement clinker or the like, said burner comprising a number of substantially concentric ducts, which are parallel to the main axis of the burner, for conveying fuel and primary air to nozzle openings, and a number of additional ducts for conveying solid, fluid or gaseous fuel to separate nozzle openings, with said additional ducts being located in the central part of the burner.
  • Burners of the aforementioned kind are known for example from EP 965 019 and EP 967 434. These known burners comprise in the central part one or several ducts for conveying fuel, said ducts being surrounded by annular, concentric channels for introducing primary air. These centrally located channels are often used for introducing alternative fuels such as solid fuels comprising for example plastics, paper, rubber and wood chips or liquid fuels such as for example oil or mixtures of solid and/or liquid fuels.
  • the burner comprises means for changing the flow direction of the fuel which is introduced via at least one of the additional ducts in the central part of the burner, relative to the main axis of the burner, at least partially in an ascending direction.
  • the means for changing the flow direction of the fuel may be made up of any suitable means.
  • the means for changing the flow direction of the fuel which is introduced via at least one of the additional ducts in the central part of the burner comprises an injection duct which is located at the outlet point of the duct in question in immediate extension hereof, with its centreline forming an angle relative to the main axis of the burner. It is preferred that the injection duct is located so that it points upward in relation to the main axis of the burner at an angle between 1° and 25°, preferentially between 5° and 15° and most preferentially between 7° and 10°. It is further preferred that the lowest point of the outlet of the injection duct is located at a level above the upper part of the pipes of the duct in question.
  • the injection duct may in a special embodiment have an oval cross-section or may otherwise be configured so that the height/width ratio is less than 1. If this is the case, the injection velocity may be varied either by changing the cross-sectional area of the injection duct or by changing the airflow rate which is injected simultaneously with the fuel.
  • the fuel is introduced in parallel to the main axis of the burner.
  • the means for changing the flow direction of the fuel which is introduced via at least one of the additional ducts in the central part of the burner comprises an air duct, the outlet of which is located immediately at or at least partially enclosing the duct in question in such a way that the centre of gravity of the outlet cross-section of the air duct is displaced in relation to the centre of gravity of the outlet cross-section of the duct in question.
  • the change in the flow direction of the fuel is effected according to a method which involves that the cross-section of the outlet, or in other words the flow-through area of the air duct outlet is not uniformly distributed across the outlet of the fuel duct in question, entailing also that the quantity of air flowing through the air duct outlet is not uniformly distributed across the circumference of the fuel duct outlet in question. Since the greatest movement quantity of the air will occur in the area or areas of the air duct outlet where the highest air passage rates occur, the airflow in this area or these areas will physically impact the fuel so that this flow direction is changed in direction toward this area or these areas.
  • This second embodiment of the invention may be combined with the aforementioned first embodiment.
  • the fuel is also introduced in parallel to the main axis of the burner.
  • the means for changing the flow direction of the fuel which is introduced via at least one of the additional ducts in the central part of the burner comprises a separate air duct, the outlet of which is located immediately at or at least partially enclosing the duct in question, and forming an angle relative to the main axis of the burner.
  • the flow direction of the fuel is changed according to a method whereby the air being injected via the separate air duct forces the fuel in a different direction determined as a function of the angle formed by the air duct in relation to the main axis of the burner.
  • the air duct is fitted so that it points upward relative to the main axis of the burner at an angle of between 8° and 80°, preferentially between 35° and 60°. In this embodiment the direction and velocity of injection will be changed by varying the airflow rate.
  • This third embodiment of the invention may be combined with one or both of the embodiments described above.
  • the duct 4a, 4 may be configured with an outlet cross-section which forms an angle which is different from 90° relative to the centreline through the duct. Such a configuration can be used to effect a change in the direction of the fuel stream exclusively or in combination with the above-mentioned embodiments.
  • Fig. 1 shows a first embodiment of the burner according to the invention
  • Fig. 2 shows a second embodiment of the burner according to the invention
  • Fig. 3 shows a third embodiment of the burner according to the invention.
  • Figs. 1-3 show front views as well as sectional views of three different embodiments of the burner according to the invention, and they all comprise two substantially concentric ducts 1 and 2 for conveying primary air which are parallel to the main axis B a , and a herewith concentric duct 3 for pneumatic conveyance of coal dust and a central part 10 which comprises a duct 4 for conveying solid alternative fuel, and a number of additional ducts or pipes 6, 7 and 8 for ignition gas burner, oil burner and gas burner, respectively.
  • the burners shown in Figs. 2 and 3 also comprise an air duct 5 which encloses the duct 4.
  • the burner comprises an introduction duct 4a which is fitted in extension of the duct 4 for conveying solid alternative fuel.
  • the introduction duct 4a is arranged so that it points upward relative to the main axis of the burner at an angle ⁇ of approximately 8° relative to its centreline.
  • the injection velocity of the fuel can be varied by changing the cross-sectional area of the introduction duct 4a or by varying the airflow rate which is injected simultaneously with the fuel.
  • the burner comprises, as mentioned, an air duct 5, the outlet of which is located so that it encloses the duct 4 for conveying solid alternative fuel.
  • the air duct 5 is arranged so that the centre of gravity of the outlet cross-section of the air duct 5 is displaced upwards relative to the centre of gravity of the outlet cross- section of the duct 4.
  • the largest quantity of air will flow through the upper part of the air duct 5, thereby impacting the fuel stream in upward direction, hence changing the flow of direction of the fuel in the upward direction.
  • the movement quantity of the air in the shown embodiment will be greatest in the upper area of the outlet of the air duct 5.
  • this second embodiment of the invention may be combined with the first embodiment described above, although this is not shown in the drawing.
  • the burner comprises, as mentioned, an air duct 5 the outlet of which is located so that it encloses the duct 4 for conveying solid alternative fuel.
  • the air duct 5 is arranged so that it points upwards, forming an angle ⁇ of approximately 65° relative to the main axis of the burner. This will cause the flow direction of the fuel to be changed in the upward direction due to the fact that the airflow being injected via the air duct 5 will force the fuel in the upward direction.
  • the direction and velocity of injection can be changed by varying the airflow rate.
  • This third embodiment of the invention may as previously mentioned be combined with one or both of the aforementioned embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Furnace Details (AREA)
  • Pre-Mixing And Non-Premixing Gas Burner (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Gas Burners (AREA)

Abstract

L'invention concerne un brûleur permettant d'introduire un combustible solide, liquide ou gazeux dans une zone de combustion d'un four, par exemple un four rotatif servant à fabriquer du clinker de ciment ou d'autres matériaux semblables. Ledit brûleur comprend un certain nombre de conduits sensiblement concentriques (1, 2, 3) parallèles à l'axe principal B3 du brûleur, destinés à transporter le combustible et l'air primaire vers des ouvertures de buse, ainsi qu'un certain nombre de conduits supplémentaires (4, 6, 7, 8) destinés à transporter un combustible solide, liquide ou gazeux vers des ouvertures de buse séparées, lesdits conduits supplémentaires étant situés dans la partie centrale (10) du brûleur. Le brûleur se caractérise en ce qu'il comprend des moyens (4a, 5) de changement de la direction d'écoulement d'un combustible qui est introduit par au moins un des conduits supplémentaires dans la partie centrale (10) du brûleur, par rapport à l'axe principal B3 du brûleur, au moins dans la direction ascendante. Ceci permet aux particules de combustible individuelles de se déplacer sur une trajectoire courbée sensiblement balistique, prolongeant ainsi la durée pendant laquelle elles peuvent être maintenues dans la flamme. Un autre avantage de cette configuration de brûleur consiste en ce que les grandes particules atteignent la trajectoire la plus haute et, par conséquent, la plus longue, étant donné que la trajectoire des petites particules est plus défléchie que celle des grandes particules par l'air principal injecté par la buse annulaire extérieure à air primaire qui est parallèle à l'axe principal du brûleur. Il est ainsi possible d'obtenir une combustion plus uniforme de toutes les particules, indépendamment de leur dimension. Il est possible de changer la trajectoire des particules par altération de la vitesse ou de la direction d'injection.
EP07826814.1A 2006-11-29 2007-10-22 Brûleur équipé de moyens de changement de la direction d'écoulement d'un combustible Withdrawn EP2087285A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200601564 2006-11-29
PCT/IB2007/054281 WO2008065554A1 (fr) 2006-11-29 2007-10-22 Brûleur équipé de moyens de changement de la direction d'écoulement d'un combustible

Publications (2)

Publication Number Publication Date
EP2087285A1 true EP2087285A1 (fr) 2009-08-12
EP2087285A4 EP2087285A4 (fr) 2016-08-17

Family

ID=39467493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07826814.1A Withdrawn EP2087285A4 (fr) 2006-11-29 2007-10-22 Brûleur équipé de moyens de changement de la direction d'écoulement d'un combustible

Country Status (13)

Country Link
US (1) US20100003625A1 (fr)
EP (1) EP2087285A4 (fr)
JP (1) JP5394247B2 (fr)
CN (1) CN101542204B (fr)
AU (1) AU2007326900B2 (fr)
BR (1) BRPI0719644A2 (fr)
CA (1) CA2667921C (fr)
EG (1) EG25502A (fr)
MX (1) MX2009005411A (fr)
RU (1) RU2437029C2 (fr)
UA (1) UA97963C2 (fr)
WO (1) WO2008065554A1 (fr)
ZA (1) ZA200902956B (fr)

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MX2011011221A (es) * 2009-04-24 2011-11-18 Smidth As F L Quemador.
US8827691B2 (en) * 2010-07-12 2014-09-09 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Distributed combustion process and burner
US8632621B2 (en) * 2010-07-12 2014-01-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude Method for melting a solid charge
DE102010061496A1 (de) * 2010-12-22 2012-06-28 Thyssenkrupp Polysius Ag Rohrförmiger Brenner sowie Verfahren zum Betreiben eines rohrförmigen Brenners
EP2500640A1 (fr) * 2011-03-16 2012-09-19 L'AIR LIQUIDE, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude Procédé de combustion à faible NOx et brûleur correspondant
US20150292737A1 (en) * 2012-10-11 2015-10-15 Ecomb Ab (Publ) Supply device for a combustion chamber
DE102012019912A1 (de) * 2012-10-11 2014-04-17 Linde Aktiengesellschaft Brenner
DE102013004016A1 (de) * 2013-03-08 2014-09-11 Messer Austria Gmbh Mehrstoffbrenner und Verfahren zum Beheizen eines Ofenraums
JP6070323B2 (ja) * 2013-03-21 2017-02-01 大陽日酸株式会社 燃焼バーナ、バーナ装置、及び原料粉体加熱方法
US11421871B2 (en) * 2019-08-14 2022-08-23 Taiheiyo Cement Corporation Combustible waste injection device and method for operating the same

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Also Published As

Publication number Publication date
RU2009118564A (ru) 2011-01-10
WO2008065554A1 (fr) 2008-06-05
EP2087285A4 (fr) 2016-08-17
ZA200902956B (en) 2010-07-28
EG25502A (en) 2012-01-22
AU2007326900B2 (en) 2012-12-13
RU2437029C2 (ru) 2011-12-20
JP2010511140A (ja) 2010-04-08
AU2007326900A1 (en) 2008-06-05
CA2667921C (fr) 2015-04-21
CN101542204A (zh) 2009-09-23
CA2667921A1 (fr) 2008-06-05
UA97963C2 (ru) 2012-04-10
MX2009005411A (es) 2009-06-01
JP5394247B2 (ja) 2014-01-22
CN101542204B (zh) 2012-12-26
BRPI0719644A2 (pt) 2014-04-01
US20100003625A1 (en) 2010-01-07

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