EP1532394A1

EP1532394A1 - Hybrid burner and corresponding operating method

Info

Publication number: EP1532394A1
Application number: EP03729789A
Authority: EP
Inventors: Richard Carroni; Timothy Griffin
Original assignee: Alstom Technology AG
Current assignee: Ansaldo Energia Switzerland AG
Priority date: 2002-08-30
Filing date: 2003-07-02
Publication date: 2005-05-25
Anticipated expiration: 2023-07-02
Also published as: WO2004020901A1; AU2003240374A1; EP1532394B1; US7717700B2; US20050196714A1

Abstract

The invention relates to a hybrid burner (1) for a combustion chamber (7), particularly of a power plant, comprising a housing (2) inside of which a full oxidation catalytic converter (9) and partial oxidation catalytic converter (10) are placed. An entry side of the housing (2) is connected to at least one oxidator supply (3) and to at least one fuel supply (4, 5). An exit side of the housing (2) is connected to a combustion chamber (7).

Description

Hybrid burner and associated operating procedure

Technical field

The invention relates to a hybrid burner for a combustion chamber, in particular a power plant. The invention also relates to a method for operating such a hybrid burner.

State of the art

From EP 0 767 345 A2 it is known in principle to use a hydrogen generator to generate a hydrogen-containing gas from a fuel-oxidizer mixture and to add it to a fuel-oxidizer mixture. The hydrogen increases the reactivity of the fuel-oxidizer mixture, which can improve combustion in a catalytic burner stage. The hydrogen generator used here fractionates the associated fuel and thereby generates the hydrogen, preferably with the aid of a catalyst.

From EP 0 849 451 A2 a method for combustion stabilization is known in which a conventional premix burner is supplied with a fuel-oxidizer mixture and the ignited mixture is introduced into a combustion chamber of a combustion chamber for complete combustion. In parallel, another fuel-oxidizer mixture is fed to a catalyst that contains a water generated exhaust gas. This hydrogen-containing exhaust gas is then injected directly into the combustion chamber, specifically in zones that are particularly suitable for flame stabilization.

No. 6,358,040 B1 shows a method in which a hydrogen-containing exhaust gas can be generated from a rich fuel-oxidizer mixture by means of a catalyst. This hydrogen-containing exhaust gas is diluted with preheated oxidizer to such an extent that a lean fuel-oxidizer mixture is formed which burns completely in a subsequent burner stage.

EP 0 710 797 B1 shows a premix burner, in the head of which a lance is arranged. This lance contains a catalyst at its outlet end.

Presentation of the invention

The invention, as characterized in the claims, deals with the problem of specifying an improved embodiment for a burner or for an associated operating method. In particular, a way for such a burner is to be shown to combine a comparatively low-emission catalytic combustion with a chemical flame stabilization in the combustion chamber.

According to the invention, this problem is solved by the subject matter of the independent claims. Advantageous embodiments are the subject of the dependent claims.

The invention is based on the general idea of designing the burner as a hybrid burner, in that the burner comprises a full oxidation catalyst on the one hand and a partial oxidation catalyst on the other, which are accommodated in a common housing so that they can be flowed through in parallel. In the present context, a partial oxidation catalyst is used Understand catalyst that is designed so that it does not fully oxidize at least a portion of the fuel to CO ₂ and H ₂ 0 in a supplied rich fuel-oxidizer mixture, but only partially, that is, partially to H ₂ and CO. It is clear that a different proportion of fuel can also be fully implemented. As a rule, the partial conversion of fuel in the partial oxidation catalytic converter should clearly predominate. A partial oxidation catalyst works with rhodium, for example. In contrast to this, the pre-oxidation catalytic converter is designed in such a way that in a supplied lean fuel-oxidizer mixture, a predominant portion of the fuel is regularly completely oxidized or converted to CO ₂ and H ₂ O. A pre-oxidation catalyst works with palladium, for example.

This design makes it possible, in particular, to supply the partial oxidation catalyst with a rich fuel-oxidizer mixture which can be partially oxidized at comparatively low temperatures. This partial oxidation generates heat, which can be used to heat the full oxidation catalyst, so that the ignition temperature for a lean fuel-oxidizer mixture can also be reached comparatively quickly there. The catalytic combustion in the hybrid burner according to the invention can thus be started relatively easily and runs comparatively stably.

The partial oxidation catalyst is expediently designed in such a way, e.g. as a lance or in a lance that it discharges its exhaust gases into a central recirculation zone that forms in the combustion chamber. If the partial oxidation catalytic converter is supplied with a rich fuel-oxidizer mixture, its exhaust gas also has an excess fuel, so that the injection or introduction of this rich exhaust gas into the recirculation zone leads to chemical flame stabilization. This effect can be increased considerably if the partial oxidation catalytic converter is designed in such a way that it generates a hydrogen-containing exhaust gas.

Of particular interest is an embodiment of the invention in which, during a starting procedure for starting the hybrid burner, the catalytic converter gated volume flows of the fuel-oxidizer mixtures are varied in terms of their fuel content, such that during the course of the starting procedure the fuel portion in the volume stream of the first fuel-oxidizer mixture supplied to the partial oxidation catalyst decreases, while the fuel portion in the volume stream of the second fuel oxidation catalyst supplied Oxidator mixture increases. This procedure takes into account the fact that the partial oxidation of a rich first fuel-oxidizer mixture in the partial oxidation catalyst starts at lower temperatures and proceeds more stably than the full oxidation of the lean second fuel-oxidizer mixture in the pre-oxidation catalyst. The partial oxidation which has started can give off heat to the pre-oxidation catalytic converter, as a result of which the latter quickly heats up and accordingly the conversion in the second fuel-oxidizer mixture starts. When the full oxidation catalyst is started up, the heat emission from the partial oxidation catalyst stabilizes the combustion reaction.

With this procedure it is clear that the fuel fraction in the volume flow of the rich first fuel-oxidizer mixture supplied to the partial oxidation catalyst cannot be reduced arbitrarily, since otherwise the fuel-oxidizer ratio λ would become too large, with the result of overheating. The partial oxidation catalyst serves as a pilot and can be permanently active, for example when λ = 0.5. Alternatively, the partial oxidation catalyst pilot can be deactivated, for which purpose it is necessary to stop the supply of oxidizer before switching off the fuel supply, it being possible in principle to purge with an inert gas, for example N ₂ .

The fuel proportions in the volume flows of the fuel-oxidizer mixtures are preferably varied during the starting procedure as a function of an inlet temperature of the hybrid burner. Further important features and advantages of the present invention result from the subclaims, from the drawing and from the associated description of the figures with reference to the drawing.

Brief description of the drawings

Preferred exemplary embodiments of the invention are illustrated in the drawings and are explained in more detail in the following description, the same reference numerals referring to identical or similar or functionally identical components.

Each shows schematically:

1 to 4 each show a greatly simplified longitudinal section through a hybrid burner according to the invention, but in different embodiments.

Ways of Carrying Out the Invention

1, a hybrid burner 1 according to the invention has a housing 2 which is connected on the input side to an oxidizer feed 3 symbolized by an arrow and to two separately controllable fuel feeds 4 and 5. As a rule, natural gas is used as fuel, although other fuels are also possible in principle. At its outlet, the housing 2 is connected via a sudden cross-sectional expansion 6 to a combustion chamber 7, which contains a combustion chamber 8. The combustion chamber 7 expediently supplies the hot exhaust gases generated with the aid of the hybrid burner 1 to a gas turbine of a power plant.

According to the invention, the hybrid burner 1 has a pre-oxidation catalytic converter 9 and a partial oxidation catalytic converter 10, both of which are arranged in the housing 2, such that they can be flowed through in parallel. The partial oxidation catalytic converter 10 is designed such that when it flows through a supplied first fuel-oxidizer mixture 11 symbolized by an arrow, at least if it is a rich fuel-oxidizer mixture, it only partially oxidizes the fuel performs. The partial oxidation catalytic converter 10 is expediently designed such that its exhaust gas 12 symbolized by an arrow contains hydrogen. The rich fuel-oxidizer mixture has z. B. a fuel / oxidizer ratio of λ <1 and preferably of λ <0.5.

In contrast to this, the pre-oxidation catalytic converter 9 is designed in such a way that when it flows through it, a second fuel-oxidizer mixture 13, which is symbolized by arrows, is essentially completely oxidized, at least if it is a lean fuel-oxidizer mixture Exhaust gas 14 symbolized by arrows has an oxidizer excess. The lean fuel-oxidizer mixture has e.g. a fuel / oxidizer ratio of λ> 1 and in particular of λ> 2.

The two catalysts 9, 10 are expediently coupled to one another in a heat-transferring manner. In the specific embodiment shown here, the pre-oxidation catalytic converter 9 is arranged in a ring and coaxially around the centrally arranged partial oxidation catalytic converter 10. The catalysts 9, 10 can each have a cylindrical outer contour. Each catalytic converter 9, 10 expediently consists of a catalytic converter body which contains a multiplicity of channels through which parallel flow can occur, the walls of which are catalytically active.

The centrally arranged partial oxidation catalytic converter 10 is designed here as a central lance. Accordingly, an outlet end 15 of this lance or of the partial oxidation catalytic converter 10 is positioned in the housing 2 downstream of an outlet end 16 of the full oxidation catalytic converter 9. In another embodiment, the partial oxidation catalytic converter 10 can also be made shorter than the pre-oxidation catalytic converter 9. The outlet end of the partial oxidation catalytic converter 10 is then located upstream of the outlet end 16 of the full oxidation catalytic converter 9. At the same time, it is possible for the outlet end 15 of the then “empty” lance to be positioned in the housing 2 downstream of the outlet end 16 of the full oxidation catalytic converter 9.

The configuration of the partial oxidation catalytic converter 10 as a lance simplifies a targeted introduction of the exhaust gases 12 of the partial oxidation catalytic converter 10 into certain zones within the combustion chamber 8. The partial oxidation catalytic converter 10 is preferably, e.g. by a corresponding alignment of the lance, so designed that it introduces its exhaust gas 12 into a central recirculation zone 17 which forms in the combustion chamber 8. The combustion in the recirculation zone 17 can be better stabilized by this measure. A stable recirculation zone 17 in turn results in the stabilization of a flame front 18 in the combustion chamber 8. The formation of such a recirculation zone 17 is promoted, for example, with the aid of the cross-sectional jump 6. For example, the combustion chamber 7 works with a so-called “vortex breakdown”, in which a vortex generated in the hybrid burner 1 bursts due to the cross-sectional widening 6 when transitioning into the combustion chamber 8. To generate such a vortex, downstream of the Full oxidation catalyst 9, a swirl generator 19 can be arranged in the housing 2. It is also possible to integrate such a swirl generator into the pre-oxidation catalyst 9. For example, this can be achieved by appropriately orienting the channels of the full oxidation catalyst 9. Such a swirl generator can in principle also be used for the partial oxidation catalyst 10 downstream or integrated into this.

By introducing or injecting the exhaust gases 12 of the partial oxidation catalytic converter 10 into the recirculation zone 17, the partial oxidation catalytic converter 10 has a kind of pilot function for initiating and stabilizing the flame front 18.

If such a pilot function is not required, it may be expedient to mix the exhaust gases 12 of the partial oxidation catalyst 10 as intensively as possible with the exhaust gases 14 of the full oxidation catalyst 9 before the exhaust gas thus formed mixture of homogeneous combustion in the combustion chamber 8 is supplied. Appropriate mixing can be achieved with a suitable mixing device, not shown here.

The hybrid burner 1 according to the invention works as follows:

A starting procedure is carried out to start the hybrid burner 1. Here, the two catalysts 9, 10 are fed via the oxidizer feed 3, a common oxidizer stream 20 symbolized by arrows, which is divided as a function of the cross-sectional areas and flow resistances between the two catalysts 9, 10. The volume flow of the oxidizer flow 20 can be kept substantially constant during the starting procedure. The first fuel-oxidizer mixture 11 is generated in that a corresponding first fuel volume flow is supplied to the partial oxidation catalytic converter 10 via the first fuel feed 4. In a corresponding manner, the second fuel-oxidizer mixture 13 can be generated by the second fuel feed 5 feeding a second fuel volume flow to the pre-oxidation catalyst 9.

During the starting procedure, the volume flow ratios in the two fuel-oxidizer mixtures 11, 13, that is, the ratio of the fuel portion to the oxidizer portion in the volume flow, are varied. The proportion of fuel in the volume flow of the first fuel-oxidizer mixture 11 decreases from a maximum value to a minimum value during the starting procedure. This minimum value cannot become arbitrarily small, since the first fuel-oxidizer mixture 11 must remain rich in order to avoid overheating and destruction of the partial oxidation catalytic converter 10. In order to switch off the fuel supply to the partial oxidation catalytic converter 10, it may be expedient to dilute the system with an inert gas, such as, for example, N ₂ . Alternatively, the partial oxidation catalytic converter 10 working as a pilot can also remain switched on during the entire operation of the hybrid burner 1, that is to say also in normal or nominal operation. The oxidizer feed can also be reduced to low values. In contrast, the proportion of fuel in the volume flow of the second fuel-oxidizer mixture 13 increases during the starting procedure from a minimum value, which can also be zero, to a maximum value.

In the embodiment shown here, the variation of the volume flow ratios in the two fuel-oxidizer mixtures 11, 13 mainly takes place in that the individual fuel volume flows, which pass through the first fuel feed 4 or the second fuel feed 5 to the catalysts 9,

10 are fed, are varied. At the same time, the volume flow of the oxidizer stream 20 can also be increased when the system is started up, but this affects both fuel-oxidizer mixtures 11, 13. It is clear that in principle a different procedure for varying the volume flow ratios in the fuel-oxidizer mixtures 11, 13 is also possible, e.g. flow through adjustable oxidizer currents with constant fuel.

During the starting procedure, the volume flows of the fuel-oxidizer mixtures 11, 13 are varied depending on an inlet temperature of the hybrid burner 1. At the beginning of the starting procedure, this inlet temperature has its lowest value, so that the volume flow of the first fuel-oxidizer mixture

11 assumes its maximum value, while the volume flow of the second fuel-oxidizer mixture 13 has its minimum value. The first fuel-oxidizer mixture 11 is advantageously chosen so that a first oxidizer fuel ratio λ-i has a value less than 1, preferably less than ^_1/2, such that the partial oxidation catalyst 10, a rich fuel-oxidizer mixture 11 is supplied. With such a rich fuel-oxidizer mixture 11, the catalytic reaction in the partial oxidation catalytic converter 10 can already be started at a relatively low temperature. This reaction generates heat, which the partial oxidation catalytic converter 10 radiates into its surroundings on the one hand and, on the other hand, emits it to the pre-oxidation catalytic converter 9 via the heat coupling. As a result, the temperature of the full oxidation catalytic converter 9 can be raised relatively quickly. At the same time, the inlet temperature of the hybrid burner 1 correlates with this. With increasing temperature, the volume flow of the second fuel-oxidizer mixture 13 is increased starting from its minimum value. The second fuel-oxidizer mixture 13 is expediently selected such that a second fuel-oxidizer ratio λ ₂ is present which is greater than 1, advantageously even greater than 2, so that a lean fuel-oxidizer mixture 13 is present. Such a lean fuel-oxidizer mixture 13 has a higher ignition temperature, which is reached relatively quickly due to the preheating by the partial oxidation catalytic converter 10, so that the catalytic reaction in the pre-oxidation catalytic converter 9 can also be started. This reaction also generates heat, which further heats up the catalysts 9, 10 and thus the hybrid burner 1.

With increasing temperature, the fuel fraction in the volume flow ratio of the first fuel-oxidizer mixture 11 is further reduced, while the fuel fraction in the volume flow ratio of the second fuel-oxidizer mixture 13 is further increased. At the end of the starting procedure, the fuel fraction in the volume flow ratio of the first fuel-oxidizer mixture 11 has its minimum value and the fuel fraction in the volume flow ratio of the second fuel-oxidizer mixture 13 has its maximum value. In absolute terms, the first fuel volume flow can decrease with a decreasing relative proportion in the volume flow of the first fuel-oxidizer mixture 11 and then increase again or remain constant, or remain constant or increase from the beginning, since the absolute oxidizer volume flow generally increases when starting up.

In this starting procedure, it must be ensured that in the first fuel-oxidizer mixture 11 the first fuel-oxidizer ratio λ ^ is always <1 in order to avoid overheating of the partial oxidation catalytic converter 10. In nominal operation, the partial oxidation catalytic converter 10 can continue to be supplied with a rich mixture 11, for example in order to reduce acoustic pulsations which are disruptive due to chemical stabilization. In all operating phases of the hybrid burner 1, the fuel is expediently mixed in such a way that the exhaust gases 12 of the partial oxidation catalytic converter 10 and the exhaust gases 14 of the full oxidation catalytic converter 9 generate a lean exhaust gas mixture overall, which can burn in the combustion chamber 8 with low emissions.

In order to simplify the auto-ignition in the partial oxidation catalytic converter 10 and to accelerate the start-up of the partial oxidation catalytic converter 10, it may be expedient to preheat the fuel supplied to the partial oxidation catalytic converter 10. For this purpose, the first fuel supply 4 can be configured such that a supply of preheated fuel results for the partial oxidation catalytic converter 10. 2 and 3 show examples of an embodiment of the first fuel feed 4, which enable sufficient preheating of the fuel.

According to FIG. 2, the first fuel supply 4 can have a heat exchanger 22. This heat exchanger 22 has, on the one hand, a fuel path and, on the other hand, an oxidizer path, the fuel path and oxidizer path being coupled to one another in a heat-transferring manner. In this way, the oxidizer can give off heat to the fuel. In the present example, the heat exchanger 22 is implemented by a helical line section of the first fuel feed 4, to which the oxidizer flow 20 is applied on its outside. The fuel path is thus inside the screw section, while the oxidizer path is formed by the outside of the screw section. It is also possible to preheat the fuel for the partial oxidation catalytic converter 10 in another way, in particular electrically.

In the embodiment according to FIG. 3, sufficient preheating of the fuel is achieved in that the fuel is introduced into the oxidizer stream 20 relatively far upstream of the partial oxidation catalytic converter 10, so that the fuel introduced up to the inlet of the partial oxidation catalytic converter 10 is so far with the oxidizer mixes that there is a temperature equalization between the currents. With an appropriate positioning of the fuel injection the desired fuel heating can be achieved. In the present exemplary embodiment, the partial oxidation catalytic converter 10 is extended on its inlet side with a feed channel 23 against the flow direction in order to obtain a sufficiently long mixing section for the fuel fed via the first fuel feed 4 and the oxidizer stream 20. It is clear that the measures shown in FIGS. 2 and 3 for preheating the fuel supplied to the partial oxidation catalytic converter 10 can also be combined with one another.

There is also a heat transfer between the inner inlet pipe and the outer inlet pipe.

As already explained above, the hybrid burner 1 in the embodiments of FIGS. 1 to 3 is designed such that the reactive exhaust gases 12 of the partial oxidation catalytic converter 10 can be introduced into the central recirculation zone 17 of the combustion chamber 7.

FIG. 4 now shows an embodiment in which the hybrid burner 1 is designed such that the exhaust gases 12 of the partial oxidation catalytic converter 10 can also be introduced into a dead water zone 21, which can form in the combustion chamber 8 in the area of the cross-sectional expansion 6. The dead water zone 21 is symbolized here by arrows which are intended to represent an annular vortex roller. By introducing the reactive exhaust gases 12 from the partial oxidation catalyst 10 into the dead water zone 21, the combustion reaction can also be stabilized there.

In contrast to the embodiments in FIGS. 1 to 3, the partial oxidation catalytic converter 10 in the variant according to FIG. 4 is designed in such a way that it surrounds the centrally arranged pre-oxidation catalytic converter 9 radially on the outside, in particular in a ring shape. The housing 12 contains an exhaust gas path 24 downstream of the partial oxidation catalytic converter 10, which begins at the outlet end 15 of the partial oxidation catalytic converter 10 and ends at the inlet of the combustion chamber 8. The exhaust gas path 24 contains a main channel 24b, which extends substantially axially, that is in the main flow direction. A plurality of secondary channels 24a branch off from the main channel 24b, which lead to the cross-sectional widening 6 and open into the combustion chamber 8 in the region of the dead water zone 21. In this way, the exhaust gas 12 of the partial oxidation catalytic converter 10 can be divided into a main stream 12b, which follows the main channel 24b, and a secondary stream 12a, which flows through the secondary channels 24a. Consequently, part of the exhaust gases 12 of the partial oxidation catalytic converter 10 can be introduced into the dead water zone 21. The main stream 12b can be at least partially introduced into the recirculation zone 17 by appropriate shaping of the main channel 24b, in particular in connection with suitable flow guiding means.

The exhaust gas 12b of the partial oxidation catalytic converter 10 can, however, in principle be directed to any point that appears expedient for such an exhaust gas supply, in particular the central and the lateral recirculation zones 17 and 21.

In order to avoid overheating of the catalysts 9, 10, especially when the hybrid burner 1 is in nominal operation, it can be expedient to equip the respective catalyst 9, 10 both with catalytically active channels and with catalytically inactive channels. The catalytically active channels and the catalytically inactive channels are then coupled to one another in a heat-transferring manner. An alternating arrangement of the channels within the respective catalyst structure is expediently carried out. During operation of the hybrid burner 1, both the catalytically active channels and the catalytically inactive channels are then flowed through by the respective fuel-oxidizer mixture 11 or 13, the mixture flow in the catalytically inactive channels the catalytically active channels and thus the respective catalyst 9, 10 cools. Of particular interest is the arrangement of catalytically active channels and catalytically inactive channels in the pre-oxidation catalytic converter 9, since this causes the main conversion of the fuel at the nominal operating point of the hybrid burner 1. LIST OF REFERENCE NUMBERS

hybrid burner

casing

Oxidator supply first fuel supply second fuel supply

Cross-sectional widening

combustion chamber

VoUoxidationskatalysator

Partial oxidation catalyst first fuel-oxidizer mixture

Exhaust gas from 10 second fuel-oxidizer mixture

Exhaust gas from 9

Exit end of 10

Exit end of 9

recirculation zone

flame front

swirl generator

oxidant

dead water zone

Heat exchanger

feed channel

exhaust path

Claims

claims

1. Hybrid burner for a combustion chamber (7), in particular a power plant, with a housing (2) in which a pre-oxidation catalytic converter (9) and a partial oxidation catalytic converter (10) can be flowed through in parallel and which, in the installed state, has at least one oxidizer supply (3) on the inlet side. and is connected to at least one fuel supply (4, 5) and on the output side to a combustion chamber (7).

2. Hybrid burner according to claim 1, characterized in that an exhaust gas path (24) downstream of the partial oxidation catalytic converter (10) is designed such that, during operation of the hybrid burner (1), exhaust gas (12) of the partial oxidation catalytic converter (10) into a central recirculation zone (17 ), which forms in a combustion chamber (8) of the combustion chamber (7) downstream of the hybrid burner (1), and / or in an outer dead water zone (21), which is located in the combustion chamber (8) in the region of a sudden cross-sectional expansion (6) Hybrid burner (1) and combustion chamber (8) forms, initiates.

3. Hybrid burner according to claim 1 or 2, characterized in that the partial oxidation catalyst (10) is designed such that during operation of the hybrid burner (1) it has an exhaust gas (12) which exits at the outlet end (15) of the partial oxidation catalyst (10), introduces into a central recirculation zone (17) which forms in a combustion chamber (8) of the combustion chamber (7) downstream of the hybrid burner (1).

4. Hybrid burner according to one of claims 1 to 3, characterized in that the partial oxidation catalyst (10) is designed as a central lance or is integrated in such a lance, an outlet end (15) of the lance in the housing (2) downstream of an outlet end (16) the full oxidation catalyst (9) is positioned.

5. Hybrid burner according to one of claims 1 to 4, characterized in that the pre-oxidation catalyst (9) surrounds the partial oxidation catalyst (10) concentrically and / or annularly.

6. Hybrid burner according to claim 1 or 2, characterized in that the partial oxidation catalyst (10) concentrically and / or surrounds the VoUoxidationsk Catalyst (9).

7. Hybrid burner according to one of claims 1 to 6, characterized in that the partial oxidation catalyst (10) is designed such that it generates a hydrogen-containing exhaust gas (12) when the hybrid burner (1) is in operation when it is operated with a rich fuel oxidizer Mix (11) is supplied.

8. Hybrid burner according to one of claims 1 to 7, characterized in that the partial oxidation catalyst (10) is designed such that it emits heat to the pre-oxidation catalyst (9) at least during a starting procedure of the hybrid burner (1).

9. Hybrid burner according to one of claims 1 to 8, characterized in that the hybrid burner (1) forms an exhaust gas path in the installed state, which via a sudden cross-sectional widening (6) from the outlet ends (15, 16) of the catalysts (9, 10) in leads a combustion chamber (8) of the combustion chamber (7).

10. Hybrid burner according to one of claims 1 to 9, characterized in that in the housing (2) at least one swirl generator (19) is arranged, which is arranged downstream of the partial oxidation catalyst (10) and / or the full oxidation catalyst (9) or in the partial oxidation catalyst ( 10) and / or in the VoUoxidationskatalyst (9) is integrated.

11. Hybrid burner according to one of claims 1 to 10, characterized in

- that a first fuel feed (4) is provided, which introduces fuel upstream of the partial oxidation catalyst (10) into an oxidizer stream (20) fed to the hybrid burner (1),

- That the first fuel supply (4) is designed such that the partial oxidation catalyst (10) is supplied with preheated fuel.

12. Hybrid burner according to claim 11, characterized in that the first fuel feed (4) introduces the fuel so far upstream of the partial oxidation catalyst (10) into the oxidizer stream (20) that the fuel exchanges heat with the oxidizer until the partial oxidation catalyst ( 10) warmed.

13. Hybrid burner according to claim 11 or 12, characterized in that the first fuel supply (4) has a heat exchanger (22) which is arranged in the oxidizer stream (20) and which has a fuel path and an oxidizer path which are coupled to one another in a heat-transferring manner.

14. Hybrid burner according to one of claims 1 to 13, characterized in that at least one of the catalysts (9, 10) has catalytically active channels and catalytically inactive channels which are coupled to one another in a heat-transferring manner and in operation of the hybrid burner (1) from one of the respective Flow through the catalyst (9, 10) supplied fuel-oxidizer mixture (11, 13).

15. Method for operating a hybrid burner (1) for a combustion chamber (7), in particular a power plant,

- The hybrid burner (1) in a housing (2) contains a pre-oxidation catalyst (9) and a partial oxidation catalyst (10) which can be flowed through in parallel, - The partial oxidation catalyst (10) is supplied with a first fuel-oxidizer mixture (11) which has a first fuel-oxidizer ratio (λ-i),

- Wherein the VoUoxidationskatalyst (9) is supplied with a second fuel-oxidizer mixture (13) having a second fuel-oxidizer ratio (λ ₂ ), which is different from the first fuel-oxidizer ratio (λ-i) is.

16. The method according to claim 15, characterized in

- that the first fuel-oxidizer ratio (λi) is less than 1, in particular less than V∑, so that a rich first fuel-oxidizer mixture (11) is present,

- That the second fuel-oxidizer ratio (λ ₂ ) is greater than 1, in particular greater than 2, so that a lean second fuel-oxidizer mixture (13) is present.

17. The method according to claim 15 or 16, characterized in that the partial oxidation catalyst (10) is designed such that it generates a hydrogen-containing first exhaust gas (12).

18. The method according to any one of claims 15 to 17, characterized in

- That a first exhaust gas (12) generated by the partial oxidation catalyst (10) is at least partially introduced into a central recirculation zone (17) which forms in a combustion chamber (8) of the combustion chamber (7) downstream of the hybrid burner (1), and / or

- That a first exhaust gas (12) generated by the partial oxidation catalytic converter (10) is at least partially introduced into an outer dead water zone (21) which is located in the combustion chamber (8) in the region of a sudden cross-sectional expansion (6) between the hybrid burner (1) and the combustion chamber (8 ) trains.

19. The method according to any one of claims 15 to 18, characterized in that a first exhaust gas (12) generated by the partial oxidation catalyst (10) is at least partially mixed with a second exhaust gas (14) generated by the pre-oxidation catalyst (9) before the exhaust gas mixture thus formed (12, 14) is introduced into a combustion chamber (8) of the combustion chamber (7).

20. The method according to any one of claims 15 to 19, characterized in that during a starting procedure for starting the hybrid burner (1), the fuel proportions in the volume flows of the fuel-oxidizer mixtures (11, 13) are varied such that in the course of Starting procedure the fuel portion in the volume flow of the first fuel-oxidizer mixture (11) decreases, while the fuel portion in the volume flow of the second fuel-oxidizer mixture (13) increases.

21. The method according to claim 20, characterized in that during the starting procedure, the fuel proportions in the volume flows of the fuel-oxidizer mixtures (11, 13) are varied depending on an inlet temperature of the hybrid burner (1).