EP0852516B1 - Brennstoffdüsenanordnung und verfahren zur durchflussregulierung - Google Patents
Brennstoffdüsenanordnung und verfahren zur durchflussregulierung Download PDFInfo
- Publication number
- EP0852516B1 EP0852516B1 EP96944567A EP96944567A EP0852516B1 EP 0852516 B1 EP0852516 B1 EP 0852516B1 EP 96944567 A EP96944567 A EP 96944567A EP 96944567 A EP96944567 A EP 96944567A EP 0852516 B1 EP0852516 B1 EP 0852516B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fuel
- backflow
- region
- nozzle arrangement
- annular gap
- 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
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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
- F23D11/24—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space
- F23D11/26—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed
- F23D11/28—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space with provision for varying the rate at which the fuel is sprayed with flow-back of fuel at the burner, e.g. using by-pass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
- B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
- B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
- B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
- B05B1/3426—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels emerging in the swirl chamber perpendicularly to the outlet axis
Definitions
- the invention relates to a fuel nozzle arrangement according to the preamble of claim 1.
- Such Fuel nozzle assembly is known from GB649970.
- the invention further relates to use of such a fuel nozzle arrangement and a method for regulating the fuel supply of a Fluid fuel burner.
- DD-PS 22 076 is an atomizer with a return control for liquid fuels, for example for gas turbine plants, described in which an improvement of Closing process of its outlet opening is to be achieved.
- Fuel is fed into the atomizer via tangential feed channels fed to a vortex chamber. In the bottom of the vortex chamber breakthroughs not specified are provided through the amount of fuel to be returned by one or more Return channels and a return line in a fuel tank is returned.
- DE 32 35 080 A1 is also on the configuration of an outlet opening of an injection nozzle received.
- the return injector described for a gas turbine burner has a cylindrical one Return needle in the flow return.
- the object of the invention is a fuel nozzle arrangement with a backflow area for backflow of fuel specify which is easy to manufacture and even mechanical and thermal loads over a longer period Remains geometrically precisely fixed over a period of time. Another The object of the invention is to use a such a fuel nozzle arrangement and a method for control to indicate the fuel supply of a fluid fuel burner.
- this is based on a fuel nozzle arrangement for a fluid fuel burner solved a fuel nozzle assembly having a major axis has, along which a backflow area, a fuel nozzle and an inflow region are arranged, the Inflow area between the fuel nozzle and the backflow area is in the inflow area a swirl flow of fuel can be generated and the backflow area one has an annular gap adjacent to the inflow region, which tapers away from the inflow area and merges into a return flow line.
- the backflow area with the annular gap which tapers into a return flow line can be mechanically simple, for example, produced by turning and / or drilling is geometric in the fuel nozzle assembly precisely adjustable and due to the simple geometry and manufacturability even with high thermomechanical loads fixed in its geometric arrangement.
- An annular gap is formed, preferably along the main axis and has the shape of a needle.
- This core is also geometrically fixed and can serve to stabilize a vortex flow of the fuel, which leads out of the fuel nozzle.
- This vortex flow is caused, for example, by a tangential inflow reached by fuel in the inflow area, the Inflow in the tangential direction to a perpendicular to the Main axis extending circle takes place.
- the fuel flow supplied divides in the inflow area, whereby part over the annular gap and the return flow line into one Fuel storage is traceable. In the annular gap this reduces the swirl of the fuel flow, so that an essentially swirl-free or at least reduced Twisted fuel flow in the return line is present.
- the flow resistance in the return line therefore has a small value.
- the swirl reduction in the backflow area starts far upstream, i.e. near the inflow area and takes place in a more or depending on the degree of rejuvenation less long axial area.
- the swirl is also reduced starting with a weak effect, causing the rotational symmetry the swirling fuel flow in the fuel nozzle is not disturbed.
- the backflow area a maximum of two parts, especially one only part that can be built.
- the annular gap is preferred largely circular and symmetrical to the main axis executed, which affects the rotational symmetry the vortex flow in the fuel nozzle safely is avoided.
- the annular gap has a cross section, which alternately consists of narrow areas and wide areas. These alternating narrow areas and wide areas are preferably realized in that the annular gap continuously merges into a plurality of flow channels, which open into the at least one return flow line.
- Each flow channel has a preferably circular one Cross section with a diameter, preferably in Axial direction remains constant and thus from one a certain range of taper of the annular gap forms in the cross section of the annular gap.
- the flow channels are preferably holes, in particular are directed axially to the main axis.
- the flow channels are preferably symmetrical, in particular arranged on a circle with a center on the main axis.
- three or more flow channels are provided, in particular five to ten.
- the flow channels preferably overlap axially with the Return flow line, which is made as an axial bore can be.
- the return line can have a diameter of about 2 cm. Due to the overlap of the flow channels with the return flow line is an inflow of fuel in the return flow line with low flow resistance reached.
- the center line of the particular as axial bores executed flow channels is preferably for this purpose on the outer circumference of the return line.
- the backflow area of the fuel nozzle assembly is preferred produced by turning and / or drilling. He can made from a single part due to the simple geometry his. Of course there is also a backflow area possible from several assembled components. With the component containing the return flow line is the Backflow area preferably connected by welding. Other mounting options, for example using pins, are also conceivable. It is also possible to get in one out of one single part manufactured backflow area also the backflow line to integrate, especially by drilling.
- the use in an oil burner is particular due to the exact reproducible geometry of the Backflow area, precise centric alignment, as well as by the stable, even with a pulsating fuel flow robust design is an advantage. In particular, it is falling out larger parts impossible, so that a disturbance of the Fuel flow in the fuel nozzle can be excluded can and therefore a particularly effective operation of the oil burner is guaranteed. Also the maintenance effort due to the low wear in the backflow area low.
- the on a method of regulating the fuel supply of a fluid fuel burner is achieved according to the invention solved in that in a fuel nozzle assembly a constant amount of fuel is fed and the amount of fuel flowing back via a return flow line through a control valve provided in the return flow line is regulated. This also causes the fuel nozzle flowing fuel amount regulated.
- the fuel nozzle assembly preferably has a main axis, one Backflow area, an inflow area and a fuel nozzle, arranged in that order along the major axis are, in the inflow area a swirl flow, in particular through a tangential feed of the fuel, can be generated.
- the backflow area instructs one the inflow area adjacent annular gap, which is tapers towards away from the inflow area and into the Reverse flow line merges. With the process is the quantitative ratio the amount of fuel passed through the return flow line and the amount of fuel passed through the fuel nozzle in a ratio of 1:40, in particular 1:30, adjustable.
- the fuel nozzle assembly 1 shows a fuel nozzle arrangement 1 in a longitudinal section shown, which is directed along a major axis 5 and largely rotationally symmetrical about this main axis 5 is.
- the fuel nozzle assembly 1 has along the Main axis 5, starting from the right edge of the drawing, a fuel nozzle 3, an adjoining inflow area 2 and a further downstream flow area 4.
- the backflow area 4 has an annular annular gap 6 on the downstream in a tapered area (Swirl reduction area) D1, D2 tapered.
- the annular gap 6 is continuous in a plurality of Flow channels 11, which are designed as bores, over.
- the annular gap 6 forms on its side facing the inflow region 2 Side a metallic core 13 of the backflow area 4, which is arranged centrally to the main axis 5.
- the flow channels 11 run axially to the main axis 5 and open into a centrally arranged to the main axis 5 Return flow line 7. This return flow line 7 is also executed as a hole.
- the flow channels 11 have one respective center point 16, which in each case on the outer circumference 15 of the return flow line 7 are arranged. Downstream of the Flow channels 11 is a control valve in the flow line 7 12 arranged.
- FIG 3 shows a cross section perpendicular to the main axis 5 in an area between the overlap area K and the Swirl reduction area D1, D2 with six flow channels 11 with circular cross-section, the center points 16 on a to the main axis 5 are arranged in a central circle.
- the tapering annular gap 6 has one Cross section 8, the alternating narrow areas 9 and wide Has areas 10.
- the wide areas 10 are by the Flow channels 11 formed.
- the annular gap 6 encloses one core 13 formed centrally to the main axis 5.
- the fuel fed into the fuel nozzle arrangement 1 enters the inflow region 2 via an inflow channel 17 tangential direction.
- Part of this Flow is in the backflow area according to flow arrows 14 4 led.
- Another part flows in the form of a vortex from the fuel nozzle 3 into a not shown Combustion chamber.
- This eddy current is caused by the core 13 stabilized so that a uniform injection of fuel into the combustion chamber is guaranteed. by virtue of the thermomechanical stable geometric fixation of the Backflow area 4 is this even injection over a longer period of time with high thermomechanical loads given.
- the swirling part the flow entering the annular gap 6 is experienced in the tapered area D1 or D2 a reduction in Twist. As a result, occurs in the axial overlap area K a flow of the fuel into the return flow line 7, which is largely swirl-free.
- the control valve 12 Through the control valve 12 is the flow cross section of the return flow line 7 can be changed. Depending on the flow cross-section of the flow line 7, the amount of fuel flowing back is regulated. With a constant fuel mass flow that flows into the inflow area 2 is introduced, is done by adjustment the flow cross section of the return flow line 7 also automatic regulation of the fuel nozzle 3 amount of fuel injected.
- With the fuel nozzle arrangement 1 is the ratio of those passed through the return flow line 7 Amount of fuel entering the fuel nozzle 3 Fuel quantity adjustable between 1:30. This matches with the requirements of an oil burner for a gas turbine, which from idle operation to maximum power operation is to be regulated.
- the invention is characterized by a particularly robust and easy to produce backflow area of a fuel nozzle arrangement, especially for an oil burner Gas turbine, off.
- the backflow area has an annular gap, which one to the main axis of the fuel nozzle arrangement centric and rotationally symmetrical core (central body) forms to stabilize the injection flow of the fuel nozzle serves.
- the annular gap tapers towards one Return flow line steadily and goes continuously into flow channels about. These flow channels are preferred axially to the main axis and axially overlap with the also axially and centrally to the main axis Backflow.
- the entire backflow area can be out manufacture a single part by turning and / or drilling. This makes it simple and easy to manufacture Manufacturing a precisely reproducible geometry, in particular a central arrangement, guaranteed.
- the backflow area is even with a pulsating flow and high thermomechanical loads in its geometric Position firmly fixed. A tearing off or falling out larger and smaller parts with an impairment of the flow in the fuel nozzle is safely avoided.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Feeding And Controlling Fuel (AREA)
- Nozzles For Spraying Of Liquid Fuel (AREA)
- Pressure-Spray And Ultrasonic-Wave- Spray Burners (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
Description
- FIG 1
- einen Längsschnitt durch eine Brennstoffdüsenanordnung und
- FIG 2 bis 4
- jeweils einen Querschnitt durch die Brennstoffdüsenanordnung gemäß FIG 1.
Claims (12)
- Brennstoffdüsenanordnung (1) für einen Fluidbrennstoffbrenner mit einer Hauptachse (5) und einem Rückströmbereich (4), einem Einströmbereich (2) und einer Brennstoffdüse (3), wobei der Einströmbereich (2) entlang der Hauptachse (5) zwischen der Brennstoffdüse (3) und dem Rückströmbereich (4) angeordnet ist, in dem Einströmbereich (2) eine Drallströmung von Brennstoff erzeugbar ist und der Rückströmbereich (4) einen an den Einströmbereich (2) angrenzenden Ringspalt (6) aufweist, dadurch gekennzeichnet, dass der Ringspalt sich in Richtung weg von dem Einströmbereich (2) verjüngt und in eine Rückströmleitung (7) übergeht.
- Brennstoffdüsenanordnung (1) nach Anspruch 1, bei der der Ringspalt (6) weitgehend kreisringförmig und zur Hauptachse (5) symmetrisch ist.
- Brennstoffdüsenanordnung (1) nach Anspruch 1 oder 2, bei der der Ringspalt (6) einen Querschnitt (8) mit abwechselnd engen Bereichen (9) und weiten Bereichen (10) hat.
- Brennstoffdüsenanordnung (1) nach einem der vorhergehenden Ansprüche, in der der Ringspalt (6) kontinuierlich in eine Mehrzahl von Strömungskanälen (11) übergeht, die in die zumindest eine Rückströmleitung (7) übergehen.
- Brennstoffdüsenanordnung (1) nach Anspruch 4, bei der die Strömungskanäle (11) Bohrungen sind, die insbesondere axial zur Hauptachse (5) verlaufen.
- Brennstoffdüsenanordnung (1) nach Anspruch 4 oder 5, bei der die Strömungskanäle (11) symmetrisch zur Hauptachse (5) angeordnet sind.
- Brennstoffdüsenanordnung (1) nach einem der Ansprüche 4 bis 6, bei der drei bis sechs Strömungskanäle (11) vorgesehen sind.
- Brennstoffdüsenanordnung (1) nach einem der Ansprüche 4 bis 7, bei der die Strömungskanäle (11) axial mit der Rückströmleitung (7) überlappen.
- Brennstoffdüsenanordnung (1) nach einem der vorhergehenden Ansprüche, bei der zumindest der Rückströmbereich (4) durch Drehen und/oder Bohren hergestellt ist.
- Brennstoffdüsenanordnung (1) nach einem der vorhergehenden Ansprüche, bei der zumindest der Rückströmbereich (4) einteilig hergestellt ist.
- Verwendung einer Brennstoffdüsenanordnung (1) mit einer Hauptachse (5), einem Rückströmbereich (4), einer Brennstoffdüse (3)und einem Einströmbereich (2), welcher entlang der Hauptachse (5) zwischen der Brennstoffdüse (3) und dem Rückströmbereich (4) angeordnet ist, wobei in dem Einströmbereich (2) eine Drallströmung von Brennstoff erzeugbar ist und der Rückströmbereich (4) einen an den Einströmbereich (2) angrenzenden Ringspalt (6) aufweist, welcher sich in Richtung weg von dem Einströmbereich (2) verjüngt und in eine Rückströmleitung (7) übergeht, in einem Ölbrenner, insbesondere für eine Gasturbine.
- Verfahren zur Regulierung der Brennstoffzufuhr eines Fluidbrennstoffbrenners bei dem eine konstante Brennstoffmenge eingespeist wird in eine Brennstoffdüsenanordnung (1) mit einer Hauptachse (5) und einem Rückströmbereich (4), einer Brennstoffdüse (3) und einem Einströmbereich (2), welcher entlang der Hauptachse (5) zwischen der Brennstoffdüse (3) und dem Rückströmbereich (4) angeordnet ist, wobei in dem Einströmbereich (2) eine Drallströmung von Brennstoff erzeugbar ist und der Rückströmbereich (4) einen an den Einströmbereich (2) angrenzenden Ringspalt (16) aufweist, welcher sich in Richtung weg von dem Einströmbereich (2) verjüngt und in eine Rückströmleitung (7) übergeht und wobei durch ein in der Rückströmleitung (7) vorgesehenes Regelventil (12) die rückströmende Brennstoffmenge und dadurch die durch die BrennStoffdüse (3) strömende Brennstoffmenge geregelt wird.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19536534 | 1995-09-29 | ||
DE19536534 | 1995-09-29 | ||
PCT/DE1996/001860 WO1997011782A2 (de) | 1995-09-29 | 1996-09-27 | Brennstoffdüsenanordnung und verfahren zur durchflussregulierung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0852516A1 EP0852516A1 (de) | 1998-07-15 |
EP0852516B1 true EP0852516B1 (de) | 2002-11-20 |
Family
ID=7773718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96944567A Expired - Lifetime EP0852516B1 (de) | 1995-09-29 | 1996-09-27 | Brennstoffdüsenanordnung und verfahren zur durchflussregulierung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0852516B1 (de) |
JP (1) | JP3850881B2 (de) |
DE (1) | DE59609892D1 (de) |
RU (1) | RU2160413C2 (de) |
WO (1) | WO1997011782A2 (de) |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB649970A (en) * | 1948-06-22 | 1951-02-07 | Dowty Equipment | Improvements in liquid-fuel burners |
FR1025118A (fr) * | 1949-09-10 | 1953-04-10 | Babcock & Wilcox France | Brûleur atomiseur pour combustibles liquides |
US2721765A (en) * | 1952-03-27 | 1955-10-25 | Hobson Ltd H M | Nozzles |
GB819042A (en) * | 1956-09-27 | 1959-08-26 | Dowty Fuel Syst Ltd | Improvements relating to liquid fuel burners |
GB918411A (en) * | 1958-03-13 | 1963-02-13 | Babcock & Wilcox Ltd | Improvements in or relating to liquid fuel burners |
DE1138987B (de) * | 1959-04-04 | 1962-10-31 | Bosch Gmbh Robert | Kraftstoffeinspritzduesen, insbesondere fuer Gasturbinen- und Strahltriebwerke |
DE1179421B (de) * | 1963-02-14 | 1964-10-08 | Daimler Benz Ag | Brennstoffeinspritzduese fuer Brennkammern von Gasturbinentriebwerken |
DE2912252C2 (de) * | 1979-03-28 | 1982-07-15 | Herbert Ing. Penke (grad.), 4934 Horn-Bad Meinberg | "Druckregelventil für die Rücklaufleitung eines Ölbrenners mit Rücklaufdüse" |
DE3235080A1 (de) * | 1982-09-22 | 1984-03-22 | Kraftwerk Union AG, 4330 Mülheim | Ruecklaufeinspritzduese fuer die zerstaeubung von fluessigkeiten |
-
1996
- 1996-09-27 WO PCT/DE1996/001860 patent/WO1997011782A2/de active IP Right Grant
- 1996-09-27 DE DE59609892T patent/DE59609892D1/de not_active Expired - Fee Related
- 1996-09-27 RU RU98108084A patent/RU2160413C2/ru not_active IP Right Cessation
- 1996-09-27 EP EP96944567A patent/EP0852516B1/de not_active Expired - Lifetime
- 1996-09-27 JP JP51308497A patent/JP3850881B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
WO1997011782A2 (de) | 1997-04-03 |
EP0852516A1 (de) | 1998-07-15 |
DE59609892D1 (de) | 2003-01-02 |
JP3850881B2 (ja) | 2006-11-29 |
JPH11511547A (ja) | 1999-10-05 |
WO1997011782A3 (de) | 1997-08-14 |
RU2160413C2 (ru) | 2000-12-10 |
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