EP1834131A1 - Procede de combustion d'un combustible liquide par atomisation a vitesse variable - Google Patents

Procede de combustion d'un combustible liquide par atomisation a vitesse variable

Info

Publication number
EP1834131A1
EP1834131A1 EP05825841A EP05825841A EP1834131A1 EP 1834131 A1 EP1834131 A1 EP 1834131A1 EP 05825841 A EP05825841 A EP 05825841A EP 05825841 A EP05825841 A EP 05825841A EP 1834131 A1 EP1834131 A1 EP 1834131A1
Authority
EP
European Patent Office
Prior art keywords
speed
liquid fuel
combustion
atomizing gas
fuel
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Withdrawn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
EP05825841A
Other languages
German (de)
English (en)
French (fr)
Inventor
Rémi Tsiava
Patrick Recourt
Bertrand Leroux
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.)
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
Original Assignee
Air Liquide SA
LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude
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 Air Liquide SA, LAir Liquide SA pour lEtude et lExploitation des Procedes Georges Claude filed Critical Air Liquide SA
Publication of EP1834131A1 publication Critical patent/EP1834131A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
    • F23D11/10—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour
    • F23D11/101—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet
    • F23D11/102—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space the spraying being induced by a gaseous medium, e.g. water vapour medium and fuel meeting before the burner outlet in an internal mixing chamber
    • 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 
    • F23C2205/00—Pulsating combustion
    • F23C2205/10—Pulsating combustion with pulsating fuel supply
    • 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 
    • F23C2205/00—Pulsating combustion
    • F23C2205/20—Pulsating combustion with pulsating oxidant supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
    • F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
    • F23R2900/03281—Intermittent fuel injection or supply with plunger pump or other means therefor

Definitions

  • NOx nitrogen oxides are one of the most environmentally polluted pollutants, and minimizing their emission is a major technical problem.
  • Several solutions can be considered to limit NOx emissions, namely primary type measures to reduce NOx formation during the combustion itself, and secondary type measures to remove NOx from post-combustion effluents. . It should be noted that the secondary type of measurements generally require the installation of extremely expensive means, and all the more so that the rate of NOx released to reach is low.
  • Patents EP 0 524 880 and US Pat. No. 5,522,721 describe another process for reducing NOx called oscillating combustion.
  • Such a process consists in oscillating the speed of the oxidant or fuel so that the stoichiometry of the reagents deviates from 1, thus leading to a decrease in the flame temperature and therefore to a reduction in the formation of NOx.
  • the frequency, amplitude, and oscillation phases can be adjusted to also limit the formation of carbon monoxide.
  • the oscillating combustion processes involve the combustion of a gaseous fuel and are not directly applicable to the combustion of a liquid fuel.
  • variable speed varying around a nominal value of speed for which the combustion of the fuel is complete
  • the increase in the speed of the atomization gas ensures the formation of a fuel spray having a smaller drop size, and therefore a better combustion, while the decrease in the speed of the atomizing gas will cause the formation of a spray having a larger drop size, and therefore a less efficient combustion.
  • it is possible to control the physical properties of the fuel spray so as to vary the local combustion conditions, especially the flame length, and thus influence the NOx formation conditions.
  • the variation of the flame length makes it possible to increase the transfer area to the heated load by avoiding creating zones of high temperature, generating NOx.
  • the atomizing gas is injected at a speed varying around a nominal value of speed for which the combustion of the fuel is complete.
  • FIG. 1 is a schematic representation of a method according to a first embodiment of the invention wherein the speed of the atomizing gas varies during the combustion.
  • FIG. 2 is a curve showing the variation of the flame length as a function of the flow rate of the atomizing gas in the process of FIG. 1.
  • FIG. 3 is a schematic representation of a method according to a second embodiment in which the speed of the liquid fuel varies in phase with the speed of the atomization gas during the combustion.
  • the flame length varies accordingly between a value L 1 max and a value L 1 min .
  • the variation of flame length increases the surface of the thermal transfers and avoids the formation of high temperature zones.
  • the speed of the atomization gas is oscillated between a lower limit U 9 min set at 0.7 times the nominal speed and an upper terminal U 9 max fixed at 1, 2 times the nominal speed.
  • FIG. 2 represents the flame length variation L f as a function of the flow rate of the atomization gas m g for the case where the atomization gas used is air and the liquid fuel has a speed of 2.3 m. s "1.
  • the nominal value of velocity of the atomizing gas to obtain a stable flame and full combustion was determined as being equal to 99 ms" 1.
  • the speed of the atomizing gas thus varies between 69 ms -1 and 118 ms -1 .
  • the flame length varies between 3.2 m and 4.8 m, for a nominal flame length of 4 m. This range of flame lengths allows the coverage of a large area, thus ensuring increased heat transfer, and therefore greater energy efficiency while avoiding high temperature zones generating NOx.
  • minimum and maximum values of flow and velocity for the fuel are defined.
  • the speed of the liquid fuel is oscillated between a minimum speed equal to 0.3 times the nominal speed and a maximum speed equal to 1. 7 times the rated speed.
  • the flame length variation L f as a function of the liquid fuel flow is shown in FIG. 4.
  • the atomization gas used is air and the liquid fuel has a nominal speed 2.3 ms "1.
  • the liquid velocity of the fuel thus varies between 0.7 ms" 1 and 3.9 ms "1.
  • the nominal speed value of the atomizing gas to obtain a stable flame and complete combustion was determined to be 99 ms -1 .
  • the speed of the atomizing gas thus varies between 67 ms -1 and 118 m / s, in which case the flame length varies between 1.7 m and 6 m, for a nominal flame length of 4 m.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)
EP05825841A 2004-12-31 2005-12-19 Procede de combustion d'un combustible liquide par atomisation a vitesse variable Withdrawn EP1834131A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0453286A FR2880409B1 (fr) 2004-12-31 2004-12-31 Procede de combustion d'un combustible liquide par atomisation a vitesse variable
PCT/FR2005/051108 WO2006072723A1 (fr) 2004-12-31 2005-12-19 Procede de combustion d'un combustible liquide par atomisation a vitesse variable

Publications (1)

Publication Number Publication Date
EP1834131A1 true EP1834131A1 (fr) 2007-09-19

Family

ID=34952757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05825841A Withdrawn EP1834131A1 (fr) 2004-12-31 2005-12-19 Procede de combustion d'un combustible liquide par atomisation a vitesse variable

Country Status (5)

Country Link
EP (1) EP1834131A1 (ja)
JP (1) JP2008527291A (ja)
CN (1) CN100582574C (ja)
FR (1) FR2880409B1 (ja)
WO (1) WO2006072723A1 (ja)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT504523B1 (de) * 2007-01-04 2008-06-15 Glueck Christoph Ing Verfahren zum verfeuern von flüssigen brennstoffen
JP5451455B2 (ja) 2010-03-01 2014-03-26 大陽日酸株式会社 バーナの燃焼方法
JP5357108B2 (ja) 2010-06-29 2013-12-04 大陽日酸株式会社 バーナの燃焼方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE970736C (de) * 1950-04-07 1958-10-23 Kaercher Fa Alfred Vorrichtung zur Gemisch-Aufbereitung bei Brennern mit schwingender Gas-Saeule
US4568265A (en) * 1982-09-27 1986-02-04 Firey Joseph C Crossed pulse burner atomizer
JPS62261809A (ja) * 1986-05-08 1987-11-14 Matsushita Electric Ind Co Ltd 燃焼装置
US4846665A (en) * 1987-10-23 1989-07-11 Institute Of Gas Technology Fuel combustion
FR2679626B1 (fr) * 1991-07-23 1993-10-15 Air Liquide Procede et installation de combustion pulsee.
FR2711769B1 (fr) * 1993-10-29 1995-12-08 Air Liquide Procédé de combustion dans un four industriel.
US5456594A (en) * 1994-03-14 1995-10-10 The Boc Group, Inc. Pulsating combustion method and apparatus
JP4693968B2 (ja) * 2000-09-11 2011-06-01 大陽日酸株式会社 炉の運転方法
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006072723A1 *

Also Published As

Publication number Publication date
CN100582574C (zh) 2010-01-20
WO2006072723A1 (fr) 2006-07-13
JP2008527291A (ja) 2008-07-24
CN101091089A (zh) 2007-12-19
FR2880409B1 (fr) 2007-03-16
FR2880409A1 (fr) 2006-07-07

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