EP0902233A1 - Combined pressurised atomising nozzle - Google Patents

Abstract

Fluid (14) is fed to two supply channels, of which the first (7), with one outlet orifice (11), is at least partly surrounded by the second (12), which has at least two outlet orifices (13). The latter are preferably uniformly distributed around the circumference of the nozzle body (1).

Description

Technical field

The invention relates to a combined pressure atomizer nozzle operated with liquid fuel for gas turbine burners, according to the preamble of claim 1.

State of the art

Low-pollution combustion of liquid fuels, e.g. Extra light heating oil, requires the complete evaporation of the fuel drops as well Premixing the fuel vapor with the combustion air before reaching the Flame front. Even small zones with a higher fuel concentration lead to the reaction zone to elevated temperatures and thus to increased formation of thermal nitrogen oxides. A disadvantage of lean premixed flames is that the flame temperatures are very close to the extinguishing limit. To at low load and thus lower flame temperature a stable Realizing burner operation is a targeted enrichment of the flame stabilization zones necessary. So there is the problem with a burner and an atomizer nozzle to cover a wide operating range of the gas turbine.

The necessary for a good distribution of the fuel in the combustion air The penetration depth of the fuel spray into the combustion air is mainly due to influences the ratio of the pulse flows of combustion air and fuel. This ratio changes with the operating conditions, i.e. as a result of changes in the fuel mass flow, in the fuel pressure and in the temperature and the pressure of the burner air. The evaporation time of the fuel depends essentially of the atomization quality, the relative speed between Fuel and air as well as the ambient conditions such as temperature and pressure off. While the latter for the different load conditions the gas turbine process are specified, the atomization quality and the relative speed is mainly determined by the atomizing nozzle. At conventional gas turbine burners are used to compensate for the changing Ambient conditions return-controlled swirl atomizers or two-stage swirl atomizers used. However, since there is no specific change in the direction of injection with swirl nozzles is possible, these known atomizer nozzles only allow a rough adjustment of the atomization quality and the fuel impulse the respective load conditions.

An improvement is with the high pressure atomizer nozzle disclosed in EP-A2-0 711 953 to achieve their outlet openings on the zones of high air speed are aligned and where the angle of the fuel spray to the axis of the burner is at least as large as the cone half angle of the Brenners. As the name expresses, this is particularly important for the operation suitable for a double-cone burner known from EP-B1-0 321 809 Pressure atomizer nozzle high pressure required. This requires the liquid fuel can be supplied with a pressure of more than 100 bar, but this is a considerable Effort in the design of the fuel system required. In addition is likewise no change in the direction of injection and the jet profile possible.

DE-PS 862 599 is a combined two- or multi-stage swirl atomizer is known, but an impulse behavior unsuitable for gas turbine burners having. The resulting swirl spray does indeed produce very fine atomization reached, but the fuel pulse is too small to distribute sufficiently the fuel droplets in the combustion air and thus a good premix to achieve.

Presentation of the invention

The invention tries to avoid these disadvantages. It is based on the task to create a combined pressure atomizing nozzle for gas turbine burners, with an improved adjustment of the atomization quality of liquids to the respective load conditions, i.e. a good premix throughout Load range can be realized.

According to the invention, this is achieved in that with a device according to the preamble of claim 1, the second feed channel at least two outlet openings to the outside space. This makes the combined pressure atomizer nozzle designed as a multi-hole orifice nozzle with a simple, central nozzle, which besides the fine atomization of the liquid fuel also one high fuel pulse guaranteed. In this way, both rapid evaporation of the liquid fuel as well as a good premix of the fuel spray can be achieved with the combustion air, which is why the inventive Pressure atomizer nozzle, especially for gas turbine burners suitable is. In addition, a relatively simple pressure atomizer nozzle created with a small footprint, the two-tier only by the additional Introducing the outlet openings of the second feed channel is realized.

Compared to the injection of liquid fuel known from the prior art Via a ring channel (DE-PS 862 599) by the inventive Discharge openings several separate fuel sprays with a relative creates a narrow spray cone. However, these fuel sprays have one clearly higher momentum than an annular fuel spray and also have a larger one Relative speed of the liquid fuel to the combustion air. Therefore, an improved premixing can be achieved with this solution. With a fuel distribution that corresponds to the specific operating situation between the orifice nozzle and the central nozzle is with the pressure atomizer nozzle both targeted mixing of the liquid fuel into the combustion air as well as an adjustment of the fuel pulse to the required Allows penetration depth of the liquid fuel into the combustion air. About the central nozzle, i.e. through the first feed channel, the pressure atomizer nozzle such a mass flow of liquid fuel supplied, which of the required Corresponds to the amount of fuel in the gas turbine at partial load.

It is particularly advantageous if the outlet openings of the second feed channel are evenly distributed on the circumference of the nozzle body. This arrangement ensures a uniform fuel concentration in the reaction zone and therefore prevents the increased formation of nitrogen oxides.

The first feed channel is inside a first tube and the second feed channel formed inside a second tube. Both tubes are concentric arranged to each other and are downstream from a cover to the outside completed. The cover and the first tube are made in one piece. As a result, the pressure atomizing nozzle can be installed relatively easily, by placing the second tube up to its stop on the lid on the first tube is postponed. Then the second tube and the lid become firm connected to one another, for example by welding.

Immediately upstream of the outlet openings of the second feed channel is advantageous a turbulence chamber is formed. By including the Turbulence chamber in the multi-hole orifice nozzle can atomize the liquid fuel be improved. The turbulence chamber is from the second feed channel separated by a partition. In the partition are off-center arranged at least two turbulence generator openings of the second feed channel. With such an asymmetrical introduction of the liquid fuel into the turbulence chamber can achieve higher turbulence and thereby the atomization of liquid fuel can be further improved.

The turbulence generator openings are particularly advantageously offset from the outlet openings arranged of the second feed channel. The displacement is preferably with four turbulence generator openings or outlet openings about 45 °, so the arrangement of the turbulence openings takes place exactly in the middle between the outlet openings. This leads to a more intense, small-scale and turbulent structure, i.e. to a very fine fuel spray.

The pressure atomizing nozzle with the additional turbulence chamber can also be installed relatively easily. The lid is the first The tube and the partition are made in one piece, so that these components together, to some extent as an insert, are inserted into the second tube can. Finally, the first tube and the lid, for example by welding, firmly connected.

An alternative to a simple, central nozzle is between the first feed channel and the outlet opening either a swirl chamber or a turbulence chamber educated. In the first case, i.e. when using a swirl nozzle, a swirl spray is used generated with a relatively wide spray cone, so that even at partial load high fuel concentration in the center of the burner and sufficient Evaporation of the fuel can be achieved. This also enables in the partial load range the gas turbine has a stable burner operation. In contrast, becomes a turbulence nozzle used as a central nozzle, it can with good atomization a narrower spray angle of the liquid fuel can be realized. On in this way the fuel concentration in the center of the burner can be further increased and thereby the burner operation can be additionally stabilized at partial load.

Brief description of the drawing

In the drawing, several embodiments of the invention are based on a combined pressure atomizer nozzle for gas turbine burners shown.

Fig. 1

einen Teillängsschnitt der Druckzerstäuberdüse, einschliesslich der Darstellung des Brennstoffsprays bei Vollastbetrieb;

Fig. 2

einen Querschnitt durch die Druckzerstäuberdüse nach Fig. 1, entlang der Linie II-II;

Fig. 3

einen Querschnitt durch die Druckzerstäuberdüse nach Fig. 1, entlang der Linie III-III;

Fig. 4

eine Darstellung gemäss Fig. 1, jedoch mit einer Darstellung des Brennstoffsprays bei Teillastbetrieb;

Fig. 5

eine schematische Darstellung des Flüssigkeitszufuhrsystems zur Druckzerstäuberdüse, wobei jeweils Flüssigbrennstoff (Brennöl) zerstäubt wird;

Fig. 6

eine schematische Darstellung des Flüssigkeitszufuhrsystems zur Druckzerstäuberdüse, wobei unterschiedliche Flüssigkeiten (Brennöl, Wasser) zerstäubt werden;

Fig. 7

einen Teillängsschnitt einer Druckzerstäuberdüse, mit einer Turbulenzkammer im äusserenen Zuführkanal;

Fig. 8

einen Querschnitt durch die Druckzerstäuberdüse nach Fig. 7, entlang der Linie VIII-VIII;

Fig. 9

einen Querschnitt durch die Druckzerstäuberdüse nach Fig. 7, entlang der Linie IX-IX;

Fig. 10

einen Teillängsschnitt einer Druckzerstäuberdüse, mit radialen Austrittsöffnungen des äusserenen Zuführkanals;

Fig. 11

einen Querschnitt durch die Druckzerstäuberdüse nach Fig. 10, entlang der Linie X-X;

Fig. 12

einen Teillängsschnitt einer Druckzerstäuberdüse, gemäss einem nächsten Ausführungsbeispiel, bei Teillastbetrieb;

Fig. 13

einen Teillängsschnitt einer Druckzerstäuberdüse, gemäss einem weiteren Ausführungsbeispiel;

Fig. 14

einen Teillängsschnitt einer Druckzerstäuberdüse, gemäss einem weiteren Ausführungsbeispiel, bei Teillastbetrieb.

Show it:

Fig. 1

a partial longitudinal section of the atomizer nozzle, including the representation of the fuel spray at full load;

Fig. 2

a cross section through the pressure atomizing nozzle of Figure 1, along the line II-II.

Fig. 3

a cross section through the pressure atomizing nozzle of Figure 1, along the line III-III.

Fig. 4

a representation according to Figure 1, but with a representation of the fuel spray at part-load operation.

Fig. 5

a schematic representation of the liquid supply system to the pressure atomizing nozzle, wherein liquid fuel (fuel oil) is atomized in each case;

Fig. 6

is a schematic representation of the liquid supply system to the pressure atomizing nozzle, wherein different liquids (fuel oil, water) are atomized;

Fig. 7

a partial longitudinal section of a pressure atomizing nozzle, with a turbulence chamber in the outer feed channel;

Fig. 8

a cross section through the pressure atomizing nozzle of Figure 7, along the line VIII-VIII.

Fig. 9

a cross section through the pressure atomizing nozzle of Figure 7, along the line IX-IX.

Fig. 10

a partial longitudinal section of a pressure atomizer nozzle, with radial outlet openings of the outer feed channel;

Fig. 11

a cross section through the pressure atomizing nozzle of Figure 10, along the line XX.

Fig. 12

a partial longitudinal section of a pressure atomizing nozzle, according to a next embodiment, at partial load operation;

Fig. 13

a partial longitudinal section of a pressure atomizing nozzle, according to a further embodiment;

Fig. 14

a partial longitudinal section of a pressure atomizing nozzle, according to a further embodiment, in partial load operation.

Only the elements essential for understanding the invention are shown. The pressure atomizer nozzle, for example, is not shown Gas turbine burner. The direction of flow of the work equipment is indicated by arrows.

Way of carrying out the invention

The gas turbine burner, not shown, which receives the pressure atomizing nozzle is designed, for example, as a double cone burner, as it is from the EP-B1-0 321 809 is known. Of course, the pressure atomizer nozzle is in principle also suitable for other gas turbine burners, e.g. for the from the EP-A2-0 704 657 known, from a swirl generator with a subsequent mixing section existing burner. The pressure atomizing nozzle has a nozzle body 1 two concentrically arranged tubes 2, 3, which are downstream of one conical cover 4 to an outside space 5 can be completed. Here is the outside space 5 of the pressure atomizing nozzle at the same time the inside of the Gas turbine burner. The nozzle body 1 has a longitudinal axis 6, which with the longitudinal axis of the gas turbine burner, not shown, coincides.

The first, inner tube 2 encloses a first, inner feed channel 7 to which connects a swirl chamber 8 downstream. The swirl chamber 8 is on the outside from inner tube 2, downstream of the cover 4 and upstream by an insert 9 (Fig. 1). It stands with the inner feed channel 7 above, arranged in the insert 9, tangential swirl channels 10 (FIG. 2) and with the outer space 5 via an outlet opening 11 in connection. The outlet opening 11 is in the Longitudinal axis 6 of the nozzle body 1 is arranged. The second, outer tube 3 has a larger diameter than the inner tube 2, so that between two tubes 3, 2, a second, outer and designed as an annular feed channel 12 is arranged. The latter is via four outlet openings located in the cover 4 13 also connected to the outside space 5. The outlet openings 13 are evenly distributed over the circumference of the nozzle body 1 (FIG. 3) and so aligned that they are in the wake of the swirl generator of the not shown Inject the burner. The exact orientation depends on the boundary conditions of the Gas turbine. It should be noted that the number of outlet openings 13 is not set to four, however, must be for even fuel distribution at least two outlet openings 13 are present. One trained in this way Pressure atomizer nozzle is particularly suitable for swirl generators with a conical shape suitable.

The cover 4 and the inner tube 2 of the nozzle body 1 are formed in one piece. As a result, the entire pressure atomizing nozzle can be assembled relatively easily be by the outer tube 3 up to its stop on the lid 4 on the inner tube 2 is pushed on. Then the outer tube 3 and the lid 4 welded together.

When operating the gas turbine burner, the pressure atomizing nozzle is considered to be atomized Liquid 14 is a liquid fuel, for example fuel oil. Depending on the specific operating situation of the gas turbine, i.e. depending on, whether this is operated at full or partial load, the Liquid fuel 14 to the gas turbine burner either via the outer feed channel 12 or via the inner feed channel 7 of the pressure atomizing nozzle. Of the Nozzle body 1 thus has two different nozzles, namely an outer one Multi-hole orifice nozzle and a central swirl nozzle.

At partial load, the liquid fuel 14 is in the inner feed channel 7 of the nozzle body 1 introduced from where it swirls through the swirl channels 10 into the swirl chamber 8 arrives. The liquid fuel 14 is then passed through the outlet opening 11 injected into the outer space 5, the swirl nozzle being a swirl spray 15 generated with a relatively wide spray cone 16 (Fig. 4). This also applies to Partial load a high fuel concentration in the center of the burner and a sufficient evaporation of the fuel is achieved. This also enables in Partial load range of the gas turbine stable burner operation.

In the exemplary embodiment shown, the liquid fuel is supplied centrally 14 over the center and completely from the outer feed channel 12 surrounded, inner feed channel 7. Of course, the inner feed channel 7 also arranged off-center and / or only partially from the outside Supply channel 12 are surrounded so that the liquid fuel 14 is decentralized, however reaches the swirl nozzle with the same effect (not shown).

Good atomization quality and a high penetration depth into the combustion air to achieve, the injection pressure should be up to 100 bar. Of the maximum mass flow of liquid fuel 14 will be covered depending on Load range of the gas turbine selected and is usually less than 50% of the mass flow at full load. Thus, the gas turbine burner can also Work part load of the gas turbine in premix mode.

In contrast, the liquid fuel 14 is at full load in the outer feed channel 12 of the nozzle body 1 is inserted and passes through its outlet openings 13 into the outside space 5. In this way, the multi-hole orifice nozzle several fuel sprays corresponding to the number of outlet openings 13 17 each with a relatively narrow spray cone 18 (Fig. 1). The separate fuel sprays 17 have a high momentum and also have a high relative speed of the liquid fuel 14 to the combustion air. Therefore the multi-hole orifice nozzle atomizes the liquid fuel well 14. In addition, the liquid fuel 14 reaches a high depth of penetration into the combustion air, which leads to a significantly improved mixing quality. Despite the now improved penetration depth of the liquid fuel 14 in full load operation there are no problems with partial load from wall application of Droplets of fuel oil, because then it is switched to the central swirl nozzle.

Because of this variable mode of operation due to a corresponding fluid supply system can the pressure atomizing nozzle according to the invention depending on the specific Operating situation of widely differing requirements for the fuel spray 15, 17 meet. 5 is a possible fluid delivery system to the pressure atomizer nozzle shown schematically. Via a pump 19 Liquid fuel 14 to be atomized from a fuel line 20 into a Pressure tank 21 pumped. A return valve 22 is used to set the pump admission pressure. Between the pump 19 and the pressure vessel 21 is in the A shutoff valve 23 is arranged in the fuel line 20. Go from the pressure vessel 21 two lines 24, 25 from, the line 24 the second feed channel 12, i.e. the multi-hole orifice nozzle feeds and the line 25 with the first feed channel 7, i.e. communicates with the swirl nozzle. In the lines 24, 25 is each have a control valve 26, 27 which regulates the respective allow the amount of liquid supplied. Both can be used as required Control valves 26, 27 must be open, so that in this case both nozzles are in operation are. Smooth switching is possible between the two nozzles. As in Fig. 5 is indicated, can use this fuel supply system multiple burners for example, a gas turbine combustion chamber supplied with liquid fuel 14 become. The circuit shown has the advantage that to regulate the two separate nozzles existing pressure atomizer nozzle only the two control valves 26, 27, i.e. only one control valve 26 or 27 per nozzle are required. Naturally can also use a water-oil emulsion as fuel in special cases be used, whereby a further reduction in NOx emissions possible is.

An alternative fluid delivery system is shown in FIG. The pressure atomizer nozzle is supplied via a first feed line 28 with water, as a first atomizing liquid 29, and via a second feed line 30 with liquid fuel (Fuel oil), as a second liquid 31 to be atomized. In the feed lines 28, 30 there is a pump 19 'and a downstream one Shut-off valve 23 'arranged, with which the lines 28, 30 optionally closed can be. The mass flow of the liquids to be atomized 29, 31 is by means of a control valve arranged in each of the supply lines 28, 30 26 ', 27' regulated. Are, as indicated in Fig. 6, about this fluid delivery system several burners, for example a gas turbine combustion chamber supplied with liquid fuel 31 or with water 29, the pressure atomizing nozzle be operated at start or at partial load by using only fuel oil 31 is atomized via the multi-hole orifice nozzle. At higher loads or at full load the gas turbine burner is then supplied via the feed line 28 with water 29. When spraying into the interior of the gas turbine burner, not shown there is a mixing of the droplets of water 29 with that of fuel oil 31, which leads to a reduction in NOx emissions. Here, too, there is the advantage that only one for gas turbine operation Control valve 26 ', 27' per nozzle of the pressure atomizing nozzle and a total of only one supply line 30 is required for the liquid fuel 31.

Those equipped with the pressure atomizing nozzle designed according to the invention Gas turbine burners can both use several different liquid fuels 31 as well as with a liquid fuel 31 and with water 29, with only a liquid fuel 31 or with liquid fuel-water mixtures operate. They therefore allow a relatively wide range of applications and can be adapted to changing operating conditions. The central swirl nozzle is in operation of the multi-hole orifice nozzle constantly by the latter flows around the liquid 14, 31. Therefore, when switching from Full to partial load, such as e.g. in the event of a loss of load, no cooling of the Swirl nozzle required so that a quick load change can be guaranteed can.

In a next exemplary embodiment, it is immediately upstream of the outlet openings 13 of the outer feed channel 12 a turbulence chamber 32 is formed. The turbulence chamber 32 is from the outer feed channel 12 through an intermediate wall 33 separated. In the intermediate wall 33 are eccentric of the outer Feed channel 12 formed four turbulence generator openings 34 (Fig. 7). At Use of a pressure atomizer nozzle with the additional turbulence chamber 32 of the outer feed channel 12, the liquid fuel 14 via the outlet openings 13 as a highly turbulent exit jet into the interior of the gas turbine burner injected, where it then disintegrates into a fine fuel spray 17. This can further improve the premixing of the gas turbine burner become.

As can easily be seen in a comparison of FIGS. 8 and 9, the turbulence generator openings are 34, based on the main flow direction of the liquid fuel 14, at an angle of 45 ° to the outlet openings 13 of the outer feed channel 12 is arranged. This is one of the turbulence generator openings 34 in the middle between two adjacent outlet openings 13 arranged. With this measure, the turbulent structure of the Liquid fuel 14 on the one hand more intensive and on the other hand small-scale. Therefore a turbulent, rapidly disintegrating free jet emerges from the multi-hole orifice nozzle out. Of course, a number other than four outlet openings 13 can also be used or turbulence generator openings 34 can be realized, in which case the described Angle changes accordingly.

The cover 4, the inner tube 2 and the intermediate wall 33 of the nozzle body 1 are formed in one piece (Fig. 7). This also enables this pressure atomizing nozzle can be assembled relatively easily by the outer tube 3 up to its Stop on the cover 4 is pushed onto the inner tube 2. Subsequently the outer tube 3 with both the cover 4 and the partition 33 welded.

According to a further exemplary embodiment, the outlet openings 13 have of the outer feed channel 12 has a radial outlet direction 35 (FIG. 10, FIG. 11), which is particularly suitable for axial swirl generators. Especially with axially parallel Inflow to the pressure atomizing nozzle leads to a very high Penetration depth of the fuel spray 17 into the combustion air and thus to one additional improvement of the premixing of the gas turbine burner.

As an alternative to the formation of the swirl channels 10, a corresponding one is provided Embodiment turbulence channels 36 arranged in the insert 9. These lead to into a turbulence chamber 37, which in turn is connected via the outlet opening 11 is connected to the outside space 5 (FIG. 12). During partial load operation, this is off a multi-hole orifice and a central turbulence nozzle Pressure atomizer nozzle becomes a rapidly disintegrating fuel spray 38 with a particularly narrow spray cone 39 generated. This can reduce the fuel concentration further increased in the center of the burner even at part load of the gas turbine become.

Of course, the pressure atomizing nozzle can also be designed without an insert 9 so that the first feed channel 7 extends directly to the cover 4 (FIG. 13). In this case, a particularly simple, central nozzle with a small one is created Space requirements and an essentially analogous function to that of the central one Nozzles of the exemplary embodiments described above.

In a further exemplary embodiment, likewise without insert 9 is, inside the first tube 2 and concentric to this, a third Pipe 40 arranged, which ends upstream of the outlet opening 11 and the inner feed channel 7 receives. The first and the third tube 2, 40 are from each other spaced, so that between them a space designed as an air duct 41 arises. The air duct 41 widens downstream of the third pipe 40 to a mixing space 42 into which the feed channel 7 opens (FIG. 14). During operation this central nozzle is via a feed line, not shown, and the Air duct 41 air 43 brought up. In the mixing space 42, the air 43 hits the liquid fuel 14, which leads to its air-assisted injection into the outside space 5 of the pressure atomizing nozzle, i.e. into the interior of the gas turbine burner, is coming. This makes the required atomization quality independent of current fuel throughput is reached, which is particularly the case with partial load operation of Advantage is.

Reference list

1

Nozzle body

2nd

first tube

3rd

second pipe

4th

cover

5

Outside space

6

Longitudinal axis, from 1

7

first, inner feed channel

8th

Swirl chamber

9

commitment

10th

Swirl channel

11

Outlet opening, from 7

12th

second, outer feed channel, annulus

13

Outlet opening, from 12

14

Liquid, liquid fuel (fuel oil)

15

Swirl spray, fuel spray

16

Spray cone, from 15

17th

Fuel spray

18th

Spray cone, from 17

19th

pump

20th

Fuel line

21

pressure vessel

22

Return valve

23

Shut-off valve

24th

management

25th

management

26

Control valve

27

Control valve

28

Supply line

29

Liquid, water

30th

Supply line

31

Liquid, liquid fuel (fuel oil)

32

Turbulence chamber

33

Partition

34

Turbulence generator opening

35

Exit direction, radial

36

Turbulence channel

37

Turbulence chamber

38

Fuel spray

39

Spray cone

40

pipe

41

Free space, air duct

42

Mixing room

43

air

19 '

pump

23

Shut-off valve

26 '

Control valve

27 '

Control valve

Claims (10)

Combined pressure atomizing nozzle for gas turbine burners, comprising one Nozzle body (1) with at least two separate feed channels (7, 12) for at least one liquid to be atomized (14, 29, 31), the first Feed channel (7) at least partially enclosed by the second feed channel (12) as well as downstream via an outlet opening (11) with a Outside space (5) is connected and wherein the second feed channel (12) is also connected to the outside space (5), characterized in that that the second feed channel (12) has at least two outlet openings (13) to the outside space (5). Combined pressure atomizing nozzle according to claim 1, characterized in that that the outlet openings (13) of the second feed channel (12) are uniform distributed over the circumference of the nozzle body (1) are arranged. Combined pressure atomizing nozzle according to claim 1 or 2, characterized in that that the first feed channel (7) inside a first tube (2), the second feed channel (12) inside a second tube (3) formed, both tubes (2, 3) are arranged concentrically to each other and closed downstream from a cover (4) to the outside space (5) are formed in one piece, the cover (4) and the first tube (2) are. Combined pressure atomizing nozzle according to claim 1 or 2, characterized in that that immediately upstream of the outlet openings (13) of the a turbulence chamber (32) is formed in the second feed channel (12). Combined pressure atomizing nozzle according to claim 4, characterized in that that the turbulence chamber (32) from the second feed channel (12) is separated by an intermediate wall (33) and in the intermediate wall (33) at least two turbulence generator openings (34) are arranged. Combined pressure atomizing nozzle according to claim 5, characterized in that that the turbulence generator openings (34) eccentrically of the second feed channel (12) are formed in the intermediate wall (33). Combined pressure atomizing nozzle according to claim 6, characterized in that that the turbulence generator openings (34) are offset to the outlet openings (13) of the second feed channel (12) are arranged. Combined pressure atomizing nozzle according to claim 7, characterized in that that one of the turbulence generator openings (34) in the middle between two adjacent outlet openings (13) is arranged. Combined pressure atomizing nozzle according to one of claims 4 to 8, characterized characterized in that the first feed channel (7) inside a first tube (2), the second feed channel (12) inside a second Tube (3) formed, both tubes (2, 3) arranged concentrically to each other and are closed downstream from a cover (4) to the outside space (5) be, the cover (4), the first tube (2) and the partition (33) are integrally formed. Combined pressure atomizing nozzle according to one of claims 1 to 9, characterized characterized in that between the first feed channel (7) and a swirl chamber (8) or a turbulence chamber in the outlet opening (11) (37) is formed.

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