EP0461447A1 - Buse de pulvérisation par pression - Google Patents

Buse de pulvérisation par pression Download PDF

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Publication number
EP0461447A1
EP0461447A1 EP91108522A EP91108522A EP0461447A1 EP 0461447 A1 EP0461447 A1 EP 0461447A1 EP 91108522 A EP91108522 A EP 91108522A EP 91108522 A EP91108522 A EP 91108522A EP 0461447 A1 EP0461447 A1 EP 0461447A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
cone
screen
atomising
gaseous medium
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
EP91108522A
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German (de)
English (en)
Other versions
EP0461447B1 (fr
Inventor
Claude Pelet
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.)
Alstom SA
Original Assignee
ABB Asea Brown Boveri Ltd
Asea Brown Boveri AB
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 ABB Asea Brown Boveri Ltd, Asea Brown Boveri AB filed Critical ABB Asea Brown Boveri Ltd
Publication of EP0461447A1 publication Critical patent/EP0461447A1/fr
Application granted granted Critical
Publication of EP0461447B1 publication Critical patent/EP0461447B1/fr
Anticipated expiration legal-status Critical
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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
    • F23D11/36—Details, e.g. burner cooling means, noise reduction means
    • F23D11/40—Mixing tubes or chambers; Burner heads

Definitions

  • the present invention relates to a method for operating an atomizing nozzle according to the preamble of claim 1.
  • Pressure atomization of a liquid fuel in a nozzle which is upstream of a combustion chamber, for example a combustion chamber of a gas turbine or an atmospheric combustion system, regularly results in irregularities in the atomization characteristics of the nozzle in the course of an operating period, which in terms of efficiency have a negative effect on the subsequent combustion of the fuels impact.
  • An irregularity can occur due to wear of the nozzle, which can cause the spray angle to no longer work optimally.
  • Another irregularity can be caused by the fact that the nominal pressure of the fuel supplied fluctuates excessively, which causes the spray angle to swell and swell.
  • the nozzles offered on the market also produce a spray angle that is too large, in the order of 40-50 °, which is clearly at least 100% too much.
  • a nozzle works very much as a function of the load range. Then comes such a nozzle in the Atomization area of a firing used, with the final purpose of providing a fuel / air mixture, this results in additional interference on the quality of the atomization, which can be attributed, for example, to pressure fluctuations in the air flow. In addition, it must be taken into account that an air-assisted nozzle only works from a pressure of 0.2 bar and that the proportion of air in relation to the fuel is very high. An irregularity in the spray angle can also have a very negative effect on various firing units, for example whenever the atomization of the fuel is carried out in a relatively narrow supply pipe to the firing chamber, as is regularly the case with premix burners.
  • the invention seeks to remedy this.
  • the invention as characterized in the claims, is based on the object of circumventing the above-identified disadvantages in a method for atomizing a fuel which is used to provide a fuel / air mixture.
  • the spray angle can be minimized in such a way that on the one hand there is no fear of wetting the wall with the appropriate configuration, and on the other hand that once an atomization characteristic has been fixed, it remains unchanged.
  • the spray quantity can be varied without changing the spray angle.
  • a better fuel distribution in the mixture fuel cone can be achieved, because it can be driven with both a full and a hollow cone as required.
  • Another advantage of the invention can be seen in the fact that in an atomizing operation the air used for this purpose can be practically depressurized, i.e. that in an atmospheric firing system the pressure which the blower of the firing system can provide, perhaps 20 mbar, is sufficient.
  • the only figure shows a double atomizing nozzle.
  • the figure shows a double atomizing nozzle, which consists of an outer tube 1, which ends at the end in the outflow direction with an orifice 2.
  • a further orifice 3 is provided upstream of this orifice 2, which in turn is arranged downstream of a fuel nozzle 4.
  • the atomization of a liquid fuel 6 according to the present configuration takes place in two stages. Nevertheless, it is easily conceivable to dispense with a panel, either the first 3 or the second 2. This essentially depends on how the operating conditions of the entire atomization nozzle are stored, where the use of such a nozzle with regard to the combustion chamber (atmospheric combustion system, combustion chamber of a gas turbine group, isocore combustion chamber etc.) is intended.
  • the nozzle 4 which is designed here for a liquid fuel, operates at pressures between 5 and 20 bar, and is therefore a pressure atomizing nozzle.
  • this is a first, conventional atomization stage A, ie it is here with spray angles of to be calculated over 40 °.
  • the air 7 brought in through this channel 5 is here of low pressure, between 20 and 80 mbar, and comes from a blower of an atmospheric combustion system in boilers.
  • the pressure atomizing nozzle shown is primarily used in systems where a liquid fuel is used. However, this is not an indispensable requirement, because such a nozzle, as we will see later, can easily be part of a burner of a gas turbine group operated with a gaseous fuel. As for the burner, which has already been mentioned several times, this nozzle is excellently suitable for integration into a burner, as described in EP-A1-0 312 809. This cited European patent application therefore forms an integral part of the present description. The nozzle with item 3 shown in FIG. 1 of EP-A1-0 312 809 would be replaced by the double atomization nozzle described here in such a desired assembly.
  • This stage then creates an innovation in the angle of the spray cone, which turns out to be much smaller than the original one from the nozzle 4.
  • the atomization of the Fuel 6 in this stage B is largely independent of the atomization quality provided in the previous stage A.
  • the cross section of the opening 8 is designed such that approximately 50% of the air brought in through the channel 5 can swallow.
  • the remaining portion of air flows directly through a number of passages 9 provided in the nozzle 3 into a chamber 10 located downstream of the latter nozzle, which chamber 10 spreads between the rear wall of the first nozzle 3 and the front wall of the second nozzle 2.
  • this atomizing nozzle enables very small angles of the spray cone, in the order of magnitude of less than 20 °, whereby the atomization achieves a very high degree of homogeneity, which is of eminent importance for the subsequent combustion with regard to pollutant emissions and the efficiency of the system.
  • This atomization is also largely independent of the wear of the components of the entire double atomization nozzle. With this configuration, this nozzle can also be optimally cooled and shielded, should this be necessary for the respective application. Both at partial load operation or when the Even the last drops of fuel are atomized just as well.
  • the spray cone can be adjusted in stage C, depending on the size of the fuel droplets , change to a hollow or a full cone.
  • mixing operation can be carried out without further ado: the air stream 7 can be mixed with a portion of a gaseous fuel, in fact it is even possible to introduce a gaseous fuel through the channel 5 alone.
  • This double atomization nozzle is furthermore excellently suited to mixing the air 7 brought in with a portion of recirculated exhaust gas. This exhaust gas recirculation is particularly suitable for reducing the exhaust gas emissions in a near-stoichiometric operation.
EP91108522A 1990-06-07 1991-05-25 Buse de pulvérisation par pression Expired - Lifetime EP0461447B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1908/90 1990-06-07
CH1908/90A CH681480A5 (fr) 1990-06-07 1990-06-07

Publications (2)

Publication Number Publication Date
EP0461447A1 true EP0461447A1 (fr) 1991-12-18
EP0461447B1 EP0461447B1 (fr) 1995-05-10

Family

ID=4221411

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91108522A Expired - Lifetime EP0461447B1 (fr) 1990-06-07 1991-05-25 Buse de pulvérisation par pression

Country Status (7)

Country Link
US (1) US5165606A (fr)
EP (1) EP0461447B1 (fr)
JP (1) JP3360734B2 (fr)
AT (1) ATE122447T1 (fr)
CH (1) CH681480A5 (fr)
DE (1) DE59105418D1 (fr)
ES (1) ES2074192T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2842635A1 (fr) * 2005-01-17 2015-03-04 Universidad de Sevilla Procédé et dispositif de micromélange de fluides au moyen d'une cellule de reflux

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5518395A (en) * 1993-04-30 1996-05-21 General Electric Company Entrainment fuel nozzle for partial premixing of gaseous fuel and air to reduce emissions
US5566887A (en) * 1994-08-08 1996-10-22 Wymaster, Jr.; Andy Multi-vent airblast atomizer and fuel injector
GB2294415B (en) * 1994-10-24 1998-12-09 Warnstar Ltd Foam forming nozzle
US6360992B1 (en) 1996-06-28 2002-03-26 Honeywell International Inc. Hybrid deicing system and method of operation
US6047926A (en) 1996-06-28 2000-04-11 Alliedsignal Inc. Hybrid deicing system and method of operation
US20060169800A1 (en) * 1999-06-11 2006-08-03 Aradigm Corporation Aerosol created by directed flow of fluids and devices and methods for producing same
US7116696B2 (en) * 2002-06-10 2006-10-03 Ksy Corporation Efficient method and apparatus for generating singlet delta oxygen at an elevated pressure
US7397836B2 (en) * 2002-06-10 2008-07-08 Ksy Corporation Efficient method and apparatus for generating singlet delta oxygen at an elevated pressure
US20120292406A1 (en) * 2008-02-19 2012-11-22 Ganan-Calvo Alfonso M Procedure and Device For The Micro-Mixing Of Fluids Through Reflux Cell
US20090301054A1 (en) * 2008-06-04 2009-12-10 Simpson Stanley F Turbine system having exhaust gas recirculation and reheat
US9297306B2 (en) * 2008-09-11 2016-03-29 General Electric Company Exhaust gas recirculation system, turbomachine system having the exhaust gas recirculation system and exhaust gas recirculation control method
US8245492B2 (en) 2011-08-25 2012-08-21 General Electric Company Power plant and method of operation
US9127598B2 (en) 2011-08-25 2015-09-08 General Electric Company Control method for stoichiometric exhaust gas recirculation power plant
US8266913B2 (en) 2011-08-25 2012-09-18 General Electric Company Power plant and method of use
US8453462B2 (en) 2011-08-25 2013-06-04 General Electric Company Method of operating a stoichiometric exhaust gas recirculation power plant
US8205455B2 (en) 2011-08-25 2012-06-26 General Electric Company Power plant and method of operation
US8347600B2 (en) 2011-08-25 2013-01-08 General Electric Company Power plant and method of operation
US8453461B2 (en) 2011-08-25 2013-06-04 General Electric Company Power plant and method of operation
US8713947B2 (en) 2011-08-25 2014-05-06 General Electric Company Power plant with gas separation system
US8266883B2 (en) 2011-08-25 2012-09-18 General Electric Company Power plant start-up method and method of venting the power plant
JP6491898B2 (ja) * 2015-02-05 2019-03-27 三菱日立パワーシステムズ株式会社 噴霧ノズルおよび噴霧ノズルを用いた燃焼装置、ガスタービンプラント
KR102219182B1 (ko) * 2019-10-18 2021-02-23 공주대학교 산학협력단 3차원 액체 분무 장치
KR102539129B1 (ko) * 2023-02-16 2023-06-01 김정길 고형연료 연소장치

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH168865A (de) * 1933-06-05 1934-04-30 Knuesel Julius Brenner für flüssige Brennstoffe.
US3251393A (en) * 1964-12-02 1966-05-17 Exxon Research Engineering Co Flame growth control device for oil burners
NL6505721A (fr) * 1965-05-06 1966-11-07
DE3118120A1 (de) * 1980-05-09 1982-02-04 Nissan Motor Co., Ltd., Yokohama, Kanagawa Spruehverbrennungsvorrichtung
EP0321809B1 (fr) * 1987-12-21 1991-05-15 BBC Brown Boveri AG Procédé pour la combustion de combustible liquide dans un brûleur

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH81691A (de) * 1917-01-15 1919-07-01 Otto Walker Bunsenbrenner
US1342732A (en) * 1918-12-30 1920-06-08 Alfred R Anthony Fuel-oil burner
US2344519A (en) * 1941-12-27 1944-03-21 Nagel Theodore Apparatus for burning oil
FR1294972A (fr) * 1961-05-03 1962-06-01 Basf Ag Dispersions de polymères à partir de composés monomères non saturés et procédé pour leur production

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH168865A (de) * 1933-06-05 1934-04-30 Knuesel Julius Brenner für flüssige Brennstoffe.
US3251393A (en) * 1964-12-02 1966-05-17 Exxon Research Engineering Co Flame growth control device for oil burners
NL6505721A (fr) * 1965-05-06 1966-11-07
DE3118120A1 (de) * 1980-05-09 1982-02-04 Nissan Motor Co., Ltd., Yokohama, Kanagawa Spruehverbrennungsvorrichtung
EP0321809B1 (fr) * 1987-12-21 1991-05-15 BBC Brown Boveri AG Procédé pour la combustion de combustible liquide dans un brûleur

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2842635A1 (fr) * 2005-01-17 2015-03-04 Universidad de Sevilla Procédé et dispositif de micromélange de fluides au moyen d'une cellule de reflux

Also Published As

Publication number Publication date
EP0461447B1 (fr) 1995-05-10
JP3360734B2 (ja) 2002-12-24
ES2074192T3 (es) 1995-09-01
DE59105418D1 (de) 1995-06-14
CH681480A5 (fr) 1993-03-31
US5165606A (en) 1992-11-24
ATE122447T1 (de) 1995-05-15
JPH04254109A (ja) 1992-09-09

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