EP1532394B1 - Hybrid burner and corresponding operating method - Google Patents

Description

Technical area

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

State of the art

From the EP 0 767 345 A2 In principle, it is known to generate a hydrogen-containing gas from a fuel-oxidizer mixture by means of a hydrogen generator and to mix this with 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 in this case fractionates the associated fuel and thereby generates the hydrogen, preferably with the aid of a catalyst.

From the EP 0 849 451 A2 For example, a method of 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 which is a hydrogen containing exhaust gas generated. This hydrogen-containing exhaust gas is then injected directly into the combustion chamber, in zones that are particularly suitable for flame stabilization.

The US 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 oxidant so far that a lean fuel-oxidizer mixture is formed, which burns completely in a subsequent burner stage.

The EP 0 710 797 B1 shows a premix burner, in whose head a lance is arranged. This lance contains a catalyst at its exit end.

The WO96 / 41991 describes a burner which has two catalysts arranged in parallel

Presentation of the invention

The invention, as characterized in the claims, deals with the problem of providing an improved embodiment for a burner or for an associated operating method. In particular, a way is to be shown for such a burner 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 matters 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, on the one hand, a solid-state catalyst and, on the other hand, a partial oxidation catalyst, which are accommodated in a common housing in such a way that they can be flowed through in parallel. In the present context, a partial oxidation catalyst is used Catalyst understood, which is designed so that it oxidizes at least a portion of the fuel is not completely to CO ₂ and H ₂ O in a supplied rich fuel-oxidizer mixture, but only partially, so partially oxidized to H ₂ and CO. It is clear that a different share of fuel can be fully implemented. As a rule, the only partially converted fuel fraction should predominate in the partial oxidation catalyst. For example, a partial oxidation catalyst works with rhodium. In contrast, the solid oxide catalyst is designed so that in a supplied lean fuel-oxidizer mixture regularly a predominant fuel fraction is completely oxidized or converted to CO ₂ and H ₂ O. A Volloxidationskatalysator works for example with palladium.

By this construction, it is particularly possible to supply the partial oxidation catalyst a rich fuel-oxidizer mixture which can be partially oxidized at relatively low temperatures. This partial oxidation generates heat that can be used to heat the Volloxidationskatalysators, so that there comparatively quickly the ignition temperature for a lean fuel-oxidizer mixture can be achieved. The catalytic combustion in the hybrid burner according to the invention can thus be started relatively easily and runs comparatively stable.

Suitably, the partial oxidation catalyst is formed, e.g. as a lance or in a lance, that it introduces its exhaust gases in a central recirculation zone, which forms in the combustion chamber. If the partial oxidation catalyst is supplied with a rich fuel-oxidizer mixture, its exhaust gas also has a fuel surplus, so that the injection or introduction of this rich exhaust gas into the recirculation zone leads to chemical flame stabilization. This effect can be significantly increased if the partial oxidation catalyst is designed to produce a hydrogen-containing exhaust gas.

Of particular interest is an embodiment of the invention wherein, during a start-up procedure for starting the hybrid burner, that through the catalysts guided volumetric flows of the fuel-oxidizer mixtures are varied in terms of their fuel content, such that in the course of the startup procedure, the fuel fraction in the volume flow of the partial oxidation catalyst supplied first fuel-oxidizer mixture decreases, while the fuel fraction in the volume flow of the Volloxidationskatalysator supplied second fuel-oxidizer 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 oxidation-oxidation catalyst. The started partial oxidation can give off heat to the bulk oxidation catalyst, causing it to heat up rapidly and accordingly start the conversion in the second fuel-oxidizer mixture. When the all oxidation catalyst starts up, the heat release of the partial oxidation catalyst stabilizes the combustion reaction.

In this approach, it is clear that the fuel fraction in the volumetric flow of the rich first fuel-oxidizer mixture supplied to the partial oxidation catalyst can not be arbitrarily reduced, otherwise the fuel-oxidizer ratio λ would become too high, with the result of overheating. The partial oxidation catalyst serves as a pilot and can be permanently active, for example at a λ = 0.5. Alternatively, the partial oxidation catalyst pilot may be deactivated, for which it is necessary to stop the oxidizer supply before switching off the fuel supply, wherein it is basically possible to flush with an inert gas, eg N ₂ .

Preferably, the fuel fractions in the volumetric flows of the fuel-oxidizer mixtures are varied during the starting procedure in response to an inlet temperature of the hybrid combustor.

Further important features and advantages of the present invention will become apparent 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 embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

Fig. 1 bis 4

jeweils einen stark vereinfachten Längsschnitt durch einen erfindungsgemäßen Hybridbrenner, jedoch bei unterschiedlichen Ausführungsformen.

It show, each schematically:

Fig. 1 to 4

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

Ways to carry out the invention

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

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

In contrast, the Volloxidationskatalysator 9 is formed so that it flows through a fed, symbolized by arrows second fuel-oxidizer mixture 13, at least when it is a lean fuel-oxidizer mixture, substantially completely oxidized, where indicated by arrows exhaust gas 14 has an oxidant 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 particular embodiment shown here, the full oxidation catalyst 9 is arranged annularly and coaxially around the centrally arranged partial oxidation catalyst 10. The catalysts 9, 10 can each have a cylindrical outer contour. Suitably, each catalyst 9, 10 consists of a catalyst body containing a plurality of parallel-flow channels whose walls are catalytically active.

The centrally arranged partial oxidation catalyst 10 is designed here as a central lance. Accordingly, an exit end 15 of this lance or partial oxidation catalyst 10 is positioned downstream of an exit end 16 of the oxidation catalyst 9 in the housing 2. In another embodiment, the partial oxidation catalyst 10 may also be made shorter than the full oxidation catalyst 9. The outlet end of the partial oxidation catalyst 10 is then At the same time, it is possible for the outlet end 15 of the then "empty" lance to still be positioned downstream of the outlet end 16 of the solid oxide catalytic converter 9 in the housing 2.

The design of the partial oxidation catalyst 10 as a lance facilitates targeted introduction of the exhaust gases 12 of the partial oxidation catalyst 10 into certain zones within the combustion chamber 8. Preferably, the partial oxidation catalyst 10, e.g. by a corresponding orientation of the lance, designed so that it introduces its exhaust gas 12 in a central recirculation zone 17, which is formed in the combustion chamber 8. By this measure, the combustion in the recirculation zone 17 can be better stabilized. A stable recirculation zone 17 in turn results in a stabilization of a flame front 18 in the combustion chamber 8. The formation of such a recirculation zone 17 is favored, for example, by means of the cross-sectional jump 6. For example, the combustion chamber 7 operates with a so-called "vortex breakdown" in which a vortex generated in the hybrid burner 1 at the transition into the combustion chamber 8 due to the Querschnittserweite-. 6 bursts. To produce such a vortex, a swirl generator 19 may be arranged in the housing 2 downstream of the solid oxidation catalytic converter 9, as here. It is also possible to integrate such a swirl generator already in the Volloxidationskatalysator 9. For example, this can be realized by a corresponding orientation of the channels of the Volloxidationskatalysators 9. In principle, such a swirl generator can also be connected downstream of the partial oxidation catalytic converter 10 or integrated into it.

By introducing or injecting the exhaust gases 12 of the partial oxidation catalyst 10 into the recirculation zone 17, the partial oxidation catalyst 10 has a type 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 catalytic converter 10 as intensively as possible with the exhaust gases 14 of the solid oxide catalytic converter 9 before the exhaust gas mixture thus formed the homogeneous combustion in the combustion chamber 8 is supplied. A corresponding mixing can be achieved with a suitable, not shown mixing device.

• Zum Starten des Hybridbrenners 1 wird eine Startprozedur durchgeführt. Hierbei wird den beiden Katalysatoren 9, 10 über die Oxidatorzuführung 3 ein durch Pfeile symbolisierter gemeinsamer Oxidatorstrom 20 zugeführt, der sich in Abhängigkeit der Querschnittsflächen und Durchströmungswiderstände auf die beiden Katalysatoren 9, 10 aufteilt. Der Volumenstrom des Oxidatorstroms 20 kann während der Startprozedur im wesentlichen konstant gehalten werden. Das erste Brennstoff-Oxidator-Gemisch 11 wird dadurch erzeugt, dass über die erste Brennstoffzuführung 4 ein entsprechender erster Brennstoffvolumenstrom dem Teiloxidationskatalysator 10 zugeführt wird. In entsprechender Weise kann das zweite Brennstoff-Oxidator-Gemisch 13 erzeugt werden, indem die zweite Brennstoffzuführung 5 einen zweiten Brennstoffvolumenstrom dem Volloxidationskatalysator 9 zuführt.

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

• To start the hybrid burner 1, a startup procedure is performed. Here, the two catalysts 9, 10 via the Oxidatorzuführung 3 a symbolized by arrows common oxidant 20, which is divided depending on the cross-sectional areas and flow resistance to the two catalysts 9, 10. The volume flow of the oxidizer stream 20 can be kept substantially constant during the start-up procedure. The first fuel-oxidizer mixture 11 is produced by supplying a corresponding first fuel volume flow 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 supply 5 supplying a second fuel volume flow to the full oxidation catalyst 9.

During the start procedure, the volumetric flow ratios in the two fuel-oxidizer mixtures 11, 13, ie in each case the ratio of the fuel fraction to the oxidant fraction in the volumetric flow, are varied. The proportion of fuel in the volume flow of the first fuel-oxidizer mixture 11 decreases during the start-up procedure from a maximum value to a minimum value. This minimum value can not be arbitrarily small, since the first fuel-oxidizer mixture 11 must remain rich in order to avoid overheating and destruction of the partial oxidation catalyst 10. To turn off the fuel supply to the partial oxidation catalyst 10, it may be desirable to dilute the system with an inert gas, such as N ₂ . Alternatively, the operating as a pilot partial oxidation catalyst 10 remain switched on during the entire operation of the hybrid burner 1, including in normal or nominal operation. Likewise, the Oxidatorzuführung can 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 startup procedure, from a minimum value, which may also be zero, to a maximum value.

In the embodiment shown here, the variation of the volume flow conditions in the two fuel-oxidizer mixtures 11, 13 mainly takes place in that the individual fuel volume flows, which are fed to the catalysts 9, 10 via the first fuel feed 4 and via the second fuel feed 5, be varied. At the same time, the volume flow of the oxidant stream 20 can be increased during startup of the system, but this affects both fuel-oxidizer mixtures 11, 13. It will be appreciated that in principle, another approach for varying the volumetric flow ratios in the fuel-oxidizer mixtures 11, 13 is possible, e.g. by adjustable oxidizer currents at constant fuel flows.

During the starting procedure, the volume flows of the fuel-oxidizer mixtures 11, 13 are varied as a function of 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 expediently selected so that a first fuel-oxidant ratio λ _{1 has} a value less than 1, preferably less than ½, so that the partial oxidation catalyst 10 is fed with a rich fuel-oxidizer mixture 11 , With such a rich fuel-oxidizer mixture 11, the catalytic reaction in the partial oxidation catalyst 10 can be initiated even at a relatively low temperature. In this reaction, heat is generated, which radiates the partial oxidation catalyst 10 on the one hand in its surroundings and on the other hand via the heat coupling to the Volloxidationskatalysator 9. As a result, the temperature of the Volloxidationskatalysators 9 can be raised relatively quickly. At the same time, the inlet temperature of the hybrid burner 1 correlates with it.

With increasing temperature, the volume flow of the second fuel-oxidizer mixture 13 is increased from its minimum value. Suitably, the second fuel-oxidizer mixture 13 is selected so that a second fuel-oxidizer ratio λ ₂ is present, which is greater than 1, expediently 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 catalyst 10, so that the catalytic reaction in Volloxidationskatalysator 9 can be started. Heat is also generated in this reaction, which further warms up the catalysts 9, 10 and thus the hybrid burner 1.

As the temperature increases, the fuel ratio in the volume flow ratio of the first fuel-oxidizer mixture 11 is further reduced while the fuel ratio in the volume flow ratio of the second fuel-oxidizer mixture 13 is further increased. At the end of the start procedure, the fuel ratio in the volume flow ratio of the first fuel-oxidizer mixture 11 has its minimum value and the fuel ratio in the volume flow ratio of the second fuel-oxidizer mixture 13 its maximum value. In absolute terms, as the relative proportion in the volume flow of the first fuel-oxidizer mixture 11 decreases, the first fuel volume flow can first decrease and then increase again or remain constant, or remain constant or increase from the beginning, since the absolute oxidizer volume flow generally increases during startup.

In this starting procedure, it must be ensured that in the first fuel-oxidizer mixture 11, the first fuel-oxidant ratio λ _{1 is} always <1 in order to avoid overheating of the partial oxidation catalyst 10. In nominal operation, the partial oxidation catalyst 10 can continue to be supplied with a rich mixture 11, eg to reduce disturbing acoustic pulsations by chemical stabilization.

Suitably takes place in all operating phases of the hybrid burner 1, the admixing of the fuel so that the exhaust gases 12 of the partial oxidation catalyst 10 and the exhaust gases 14 of the Volloxidationskatalysators 9 produce a total of a lean exhaust gas mixture, which can burn low emissions in the combustion chamber 8.

To facilitate autoignition in the partial oxidation catalyst 10 and to accelerate startup of the partial oxidation catalyst 10, it may be desirable to preheat the fuel supplied to the partial oxidation catalyst 10. For this purpose, the first fuel supply 4 can be configured such that for the partial oxidation catalyst 10 there is a supply of preheated fuel. In the Fig. 2 and 3 Examples of an embodiment of the first fuel supply 4 are shown, which allow a sufficient preheating of the fuel.

According to Fig. 2 For example, the first fuel supply 4 may 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, wherein the fuel path and the oxidizer path are coupled to one another in a heat-transmitting manner. In this way, the oxidizer can deliver heat to the fuel. In the present example, the heat exchanger 22 is realized by a helical line section of the first fuel supply 4, which is acted upon on its outer side with the oxidizer stream 20. The fuel path is thus inside the screw portion, while the oxidizer path is formed by the outside of the screw portion. It is also possible to preheat the fuel for the partial oxidation catalyst 10 in another way, in particular electrically.

In the embodiment according to Fig. 3 a sufficient preheating of the fuel is achieved in that the introduction of the fuel into the oxidizer 20 relatively far upstream of the partial oxidation catalyst 10, so that the introduced fuel until the inlet of the partial oxidation catalyst 10 so far mixed with the oxidizer that a temperature compensation between results in the currents. With a corresponding positioning of the fuel introduction point This can achieve the desired fuel heating. In the present embodiment, the partial oxidation catalyst 10 is extended at its inlet side with a supply channel 23 against the direction of flow in order to obtain a sufficiently large mixing path for the fuel supplied via the first fuel supply 4 and the oxidizer stream 20. It is clear that in the Fig. 2 and 3 shown exemplary measures for preheating the fuel supplied to the partial oxidation catalyst 10 can also be combined with each other.

Likewise there is a heat transfer between the inner inlet tube and the outer inlet tube.

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

Fig. 4 shows an embodiment in which the hybrid burner 1 is designed so that the exhaust gases 12 of the partial oxidation catalyst 10 can also be introduced into a dead water zone 21, which can form in the combustion chamber 8 in the region of the cross-sectional widening 6. The dead water zone 21 is symbolized here by arrows which are to represent an annular vortex roll. By introducing the reactive exhaust gases 12 of the partial oxidation catalyst 10 into the dead-water zone 21, a stabilization of the combustion reaction can also be achieved there.

In contrast to the embodiments of the Fig. 1 to 3 is in the variant according to Fig. 4 the partial oxidation catalyst 10 designed so that it surrounds the centrally disposed Volloxidationskatalysator 9 radially outside, in particular annular. The housing 12 contains, downstream of the partial oxidation catalyst 10, an exhaust gas path 24 which starts at the outlet end 15 of the partial oxidation catalytic converter 10 and ends at the inlet of the combustion chamber 8. The exhaust path 24 includes a main channel 24b, which extends substantially axially, ie in the main flow direction. From the main channel 24b branch off a plurality of secondary channels 24a, which lead to the cross-sectional widening 6 and open in the region of the dead water zone 21 into the combustion chamber 8. In this way, the exhaust gas 12 of the partial oxidation catalyst 10 may divide into a main flow 12b following the main passage 24b and a sub flow 12a flowing through the sub passages 24a. Consequently, a portion of the exhaust gases 12 of the partial oxidation catalyst 10 may be introduced into the dead water zone 21. By a corresponding shaping of the main channel 24b, in particular in conjunction with suitable flow-guiding means, the main flow 12b can be at least partially introduced into the recirculation zone 17.

However, the exhaust gas 12b of the partial oxidation catalytic converter 10 can in principle be directed to any desired point which makes sense for such 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 in the nominal operation of the hybrid burner 1, it may 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. Suitably, an alternating arrangement of the channels takes place within the respective catalyst structure. 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 and 13, the mixture flow in the catalytically inactive channels being the catalytically active channels and thus the respective catalytic converter 9, 10 cools. Of particular interest is the arrangement of catalytically active channels and catalytically inactive channels in Volloxidationskatalysator 9, since this causes the nominal conversion point of the hybrid burner 1, the main reaction of the fuel.

LIST OF REFERENCE NUMBERS

1

hybrid burner

2

casing

3

oxidizer

4

first fuel supply

5

second fuel supply

6

Cross-sectional widening

7

combustion chamber

8th

combustion chamber

9

Full oxidation catalyst

10

Partial oxidation catalyst

11

first fuel-oxidizer mixture

12

Exhaust of 10

13

second fuel-oxidizer mixture

14

Exhaust from 9

15

Exit end of 10

16

Exit end of 9

17

recirculation zone

18

flame front

19

swirl generator

20

oxidant

21

dead water zone

22

Heat exchanger

23

feed channel

24

exhaust path

Claims (21)

1. Hybrid burner for a combustion chamber (7), in particular of a power plant, with a housing (2) in which a full oxidation catalyst (9) and a partial oxidation catalyst (10) with parallel through-flows are arranged, and which in installation state on the inlet side is connected to at least one oxidator supply (3), to a first fuel supply (4) for producing a first fuel-oxidator mixture (11) having a first fuel-oxidator ratio (λ₁) and supplied to the partial oxidation catalyst (10) in operation of the hybrid burner (1), and to a second fuel supply (5) for generating a second fuel-oxidator mixture (13) having a second fuel-oxidator ratio (λ₂) different from the first fuel-oxidator ratio (λ₁) and supplied to the full oxidation catalyst (9) in operation of the hybrid burner (1), and on the output side to a combustion chamber (7).
2. Hybrid burner according to claim 1, characterised in that an outlet gas path (24) is formed downstream of the partial oxidation catalyst (10) such that in operation of the hybrid burner (1), it introduces an exhaust gas (12) from the partial oxidation catalyst (10) into a central recirculation zone (17) which forms in a combustion space (8) of the combustion chamber (7) downstream of the hybrid burner (1) and/or in an outer dead-water zone (21) which forms in the combustion space (8) in the region of a jump-like cross-section widening (6) between the hybrid burner (1) and the combustion space (8).
3. Hybrid burner according to claim 1 or 2, characterised in that the partial oxidation catalyst (10) is configured such that in operation of the hybrid burner (1), it introduces an exhaust gas (12) which emerges at the outlet end (15) of the partial oxidation catalyst (10) into a central recirculation zone (17) which forms in a combustion space (8) of the combustion chamber (7) downstream of the hybrid burner (1).
4. Hybrid burner according to any of claims 1 to 3, characterised in that the partial oxidation catalyst (10) is formed as a central lance or is integrated therein, wherein an outlet end (15) of the lance is positioned in the housing (2) downstream of an outlet end (16) of the full oxidation catalyst (9).
5. Hybrid burner according to any of claims 1 to 4, characterised in that the full oxidation catalyst (9) surrounds the partial oxidation catalyst (10) in concentric and/or annular fashion.
6. Hybrid burner according to claim 1 or 2, characterised in that the partial oxidation catalyst (10) surrounds the full oxidation catalyst (10) in concentric and/or annular fashion.
7. Hybrid burner according to any of claims 1 to 6, characterised in that the partial oxidation catalyst (10) is configured such that in operation of the hybrid burner (1), it produces an exhaust gas (12) containing hydrogen if supplied with a rich fuel-oxidator mixture (11).
8. Hybrid burner according to any of claims 1 to 7, characterised in that the partial oxidation catalyst (10) is configured such that at least during a start-up procedure of the hybrid burner (1), it emits heat to the full oxidation catalyst (9).
9. Hybrid burner according to any of claims 1 to 8, characterised in that in installation state, the hybrid burner (1) forms an exhaust gas path which can lead via a jump-like cross-section widening (6) from the outlet ends (15, 16) of the catalysts (9, 10) to a combustion space (8) of the combustion chamber (7).
10. Hybrid burner according to any of claims 1 to 9, characterised in that at least one swirl generator (19) is arranged in the housing (2) and is arranged downstream of the partial oxidation catalyst (10) and/or full oxidation catalyst (9) or is integrated in the partial oxidation catalyst (10) and/or in the full oxidation catalyst (9).
11. Hybrid burner according to any of claims 1 to 10, characterised in that the first fuel supply (4) is configured such that preheated fuel is supplied to the partial oxidation catalyst (10).
12. Hybrid burner according to claim 11, characterised in that the first fuel supply (4) introduces the fuel into the oxidator flow (20) so far upstream of the partial oxidation catalyst (10) that the fuel is heated by heat exchange with the oxidator before it reaches the partial oxidation catalyst (10).
13. Hybrid burner according to claim 11 or 12, characterised in that the first fuel supply (4) has a heat transmitter (22) which is arranged in the oxidator flow (20) and has a fuel path and an oxidator path which are coupled together heat-transmissively.
14. Hybrid burner according to any of claims 1 to 13, characterised in that at least one of the catalysts (9, 10) comprises catalytically active channels and catalytically inactive channels which are coupled together heat-transmissively and through which, in operation of the hybrid burner (1), a fuel-oxidator mixture (11, 13) flows which is supplied to the respective catalyst (9, 10).
15. Method for operation of a hybrid burner (1) for a combustion chamber (7), in particular of a power plant,

    - wherein the hybrid burner (1) in a housing (2) contains a full oxidation catalyst (9) and a partial oxidation catalyst (10) which have parallel through-flows,

    - wherein the partial oxidation catalyst (10) is supplied with a first fuel-oxidator mixture (11) which has a first fuel-oxidator ratio (λ₁),

    - wherein the full oxidation catalyst (9) is supplied with a second fuel-oxidator mixture (13) which has a second fuel-oxidator ratio (λ₂) which is different from the first fuel-oxidator ratio (λ₁).
16. Method according to claim 15, characterised in that

    - the first fuel-oxidator ratio (λ₁) is less than 1, in particular less than 1/2, so that a rich first fuel-oxidator mixture (11) is present,

    - the second fuel-oxidator ratio (λ₂) is greater than 1, in particular greater than 2, so that a lean second fuel-oxidator mixture (13) is present.
17. Method according to claim 15 or 16, characterised in that the partial oxidation catalyst (10) is configured such that it produces a first exhaust gas (12) containing hydrogen.
18. Method according to any of claims 15 to 17, characterised in that

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

    - a first exhaust gas (12) produced by the partial oxidation catalyst (10) is introduced at least partially into an outer dead-water zone (21) which forms in the combustion space (8) in the region of a jump-like cross-section widening (6) between the hybrid burner (1) and the combustion chamber (8).
19. Method according to any of claims 15 to 18, characterised in that a first exhaust gas (12) produced by the partial oxidation catalyst (10) is at least partially mixed with a second exhaust gas (14) produced by the full oxidation catalyst (9) before the resulting exhaust gas mixture (12, 14) is introduced into a combustion space (8) of the combustion chamber (7).
20. Method according to any of claims 15 to 19, characterised in that during a start-up procedure for starting the hybrid burner (1), the fuel proportions in the volume flows of the fuel-oxidator mixtures (11, 13) are varied such that, during the start-up procedure, the fuel proportion in the volume flow of the first fuel-oxidator mixture (11) is reduced while the fuel proportion in the volume flow of the second fuel-oxidator mixture (13) is increased.
21. Method according to claim 20, characterised in that during the start-up procedure, the fuel proportions in the volume flows of the fuel-oxidator mixtures (11, 13) are varied as a function of an inlet temperature of the hybrid burner (1).

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