EP0461447B1 - Buse de pulvérisation par pression - Google Patents
Buse de pulvérisation par pression Download PDFInfo
- Publication number
- EP0461447B1 EP0461447B1 EP91108522A EP91108522A EP0461447B1 EP 0461447 B1 EP0461447 B1 EP 0461447B1 EP 91108522 A EP91108522 A EP 91108522A EP 91108522 A EP91108522 A EP 91108522A EP 0461447 B1 EP0461447 B1 EP 0461447B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- screen
- cone
- fuel
- orifice plate
- 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
Links
Images
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 pressure 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 causes irregularities in the atomization characteristics of the nozzle over the course of an operating period, which in terms of efficiency negatively affect 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 strongly 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 of 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.
- a spray combustion device has become known from DE-A-31 18 120, which essentially consists of an outer tube and a fuel nozzle arranged therein for atomizing a liquid fuel.
- the fuel nozzle is followed by an orifice, the fuel spray cone formed by the fuel nozzle in front of the orifice being mixed with a gaseous medium.
- the gaseous medium occurs approximately radially on the spray cone in such a way that the spray angle of the spray cone experiences a certain compression from the fuel nozzle.
- the screen coincides directly with the flame front, which exposes it to a great deal of heat. This leads to the mixture inevitably igniting upstream of the orifice. Either the panel is then burned away by the flame temperature and the dynamic pressure, or it can no longer fulfill its traditional task.
- the invention seeks to remedy this.
- the invention as characterized in the claims, is based on the object of avoiding the above-identified disadvantages of a pressure atomizing nozzle of the type mentioned at the outset, which is used to provide a fuel / air mixture.
- the main advantage of the invention can be seen in the fact that the spray angle can be minimized in such a way that on the one hand no wall wetting is to be feared 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 atomization operation the air used for this purpose can be practically unpressurized, i.e. 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 atomization 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 atomizing 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 structure and type of combustion (diffusion or premix combustion, etc.) of the respective burner in which the nozzle is integrated also play a role.
- this is a first, conventional atomization stage A, ie it is here with spray angles of to be calculated over 40 °.
- Such a requirement would at least prevent the walls of the air-guiding duct 5 from being wetted by fuel droplets.
- 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 far as the burner, which has already been mentioned several times, this nozzle is excellently suitable for integration into a burner, as described in EP-A1-0 321 809. 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-A1-0 321 809 would be replaced by the double atomization nozzle described here in the case of such a desired joining.
- 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 remainder of the air flows directly through a number of passages 9, which are provided in the orifice 3, into a chamber 10 located downstream of the latter nozzle, which chamber 10 spreads between the rear wall of the first orifice 3 and the front wall of the second orifice 2.
- this atomization 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.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
- Nozzles (AREA)
- Feeding And Controlling Fuel (AREA)
Claims (4)
- Buse de pulvérisation par pression pour un combustible liquide, se composant d'un tube extérieur (1), d'une buse à combustible (4) disposée dans celui-ci, pour la pulvérisation d'un combustible liquide, et d'un diaphragme (3, 2) placé après la buse à combustible, le cône de pulvérisation du combustible avant le diaphragme étant mélangé avec un fluide gazeux de telle sorte que le fluide gazeux arrive radialement sur le cône de projection, d'une manière telle que l'angle de projection du cône de projection sortant de la buse soit comprimé et qu'il se forme par le biais du diaphragme un cône de projection plus petit, caractérisée en ce que des passages (9) sont prévus sur un cercle autour de l'axe du diaphragme (3), à travers lesquels s'écoule une partie du fluide gazeux et arrive radialement ou quasi-radialement sur le cône de projection plus petit.
- Buse de pulvérisation par pression selon la revendication 1, caractérisée en ce que le cône de projection sort du diaphragme (3, 2) avec un angle de projection ≦ 20°.
- Buse de pulvérisation par pression selon la revendication 1, caractérisée en ce que le fluide gazeux est à une pression de 20 mbars.
- Buse de pulvérisation par pression selon la revendication 1, caractérisée en ce que le diaphragme (3) pourvu des passages (9) du côté de l'écoulement est placé après un deuxième diaphragme (2), en ce que la distance (D) entre la buse à combustible (4) et le premier diaphragme (3) ainsi que la distance (E) entre le premier diaphragme (3) et le deuxième diaphragme (2) sont variables.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1908/90A CH681480A5 (fr) | 1990-06-07 | 1990-06-07 | |
CH1908/90 | 1990-06-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0461447A1 EP0461447A1 (fr) | 1991-12-18 |
EP0461447B1 true 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) |
Families Citing this family (24)
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 |
US6047926A (en) | 1996-06-28 | 2000-04-11 | Alliedsignal Inc. | Hybrid deicing system and method of operation |
US6360992B1 (en) | 1996-06-28 | 2002-03-26 | Honeywell International 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 |
EP1839760A1 (fr) * | 2005-01-17 | 2007-10-03 | Universidad de Sevilla | Procede et dispositif de micromelange de fluides au moyen d'une cellule de reflux |
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 |
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 |
US8713947B2 (en) | 2011-08-25 | 2014-05-06 | General Electric Company | Power plant with gas separation system |
US8205455B2 (en) | 2011-08-25 | 2012-06-26 | 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 |
US8347600B2 (en) | 2011-08-25 | 2013-01-08 | General Electric Company | Power plant and method of operation |
US8245492B2 (en) | 2011-08-25 | 2012-08-21 | General Electric Company | Power plant and method of operation |
US8266883B2 (en) | 2011-08-25 | 2012-09-18 | General Electric Company | Power plant start-up method and method of venting the power plant |
US8453462B2 (en) | 2011-08-25 | 2013-06-04 | General Electric Company | Method of operating a stoichiometric exhaust gas recirculation 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 |
Family Cites Families (9)
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 |
CH168865A (de) * | 1933-06-05 | 1934-04-30 | Knuesel Julius | Brenner für flüssige Brennstoffe. |
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 |
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 | ||
JPS6026927B2 (ja) * | 1980-05-09 | 1985-06-26 | 日産自動車株式会社 | 噴霧式燃焼装置 |
CH674561A5 (fr) * | 1987-12-21 | 1990-06-15 | Bbc Brown Boveri & Cie |
-
1990
- 1990-06-07 CH CH1908/90A patent/CH681480A5/de not_active IP Right Cessation
-
1991
- 1991-05-25 EP EP91108522A patent/EP0461447B1/fr not_active Expired - Lifetime
- 1991-05-25 AT AT91108522T patent/ATE122447T1/de not_active IP Right Cessation
- 1991-05-25 ES ES91108522T patent/ES2074192T3/es not_active Expired - Lifetime
- 1991-05-25 DE DE59105418T patent/DE59105418D1/de not_active Expired - Fee Related
- 1991-06-03 US US07/709,221 patent/US5165606A/en not_active Expired - Lifetime
- 1991-06-06 JP JP13466191A patent/JP3360734B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US5165606A (en) | 1992-11-24 |
ES2074192T3 (es) | 1995-09-01 |
JP3360734B2 (ja) | 2002-12-24 |
CH681480A5 (fr) | 1993-03-31 |
JPH04254109A (ja) | 1992-09-09 |
ATE122447T1 (de) | 1995-05-15 |
DE59105418D1 (de) | 1995-06-14 |
EP0461447A1 (fr) | 1991-12-18 |
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