Abstract: A mixer assembly and a method for forming a fuel-air mixture is combinable with a burner system of a heat engine, especially a gas turbine plant.

Abstract: In a catalytic reactor for the burning of at least part of fuel-air mixtures flowing through the catalytic reactor, the catalytic reactor has a plurality of passages. The catalytic reactor is charged with lean fuel-air mixtures and rich fuel-air mixture. The catalytic reactor includes at least two sections (I,II,II). A first flow-washed section (I) is free of catalytic coatings and a catalytic coating is located in a downstream-lying second section (II) in the passages through which flows the rich fuel-air mixture.

Abstract: A catalyzer for burning part of a gaseous fuel/oxidant mixture, in particular for a burner of a power plant installation, has catalytically active channels and catalytically inactive channels and at least two sectors are arranged consecutively in the main flow direction. The sectors include a first sector defining an inlet sector and at least one following sector that includes one or more of a mixing sector arranged downstream from the inlet sector and an outlet sector. Further, the catalyzer has one or more of a smaller flow resistance in the inlet sector than any following sector, a higher catalytic activity in the inlet sector than any following sector, a plurality of holes in the mixing sector oriented transversely to the main flow direction and through which adjoining channels communicate, and a swirl generator in the outlet sector that provides a swirl to a gas mixture flowing through the outlet sector.

Abstract: A device and a method for flame stabilization in a burner (10), includes a burner housing at least partially enclosing a burner volume, into which may be introduced via at least one fuel line, fuel, and via at least one air feed means, air, forming an air/fuel mixture spreading in a preferred flow direction, which may be ignited in a combustion chamber (11) connecting downstream of the burner housing to form a stationary flame (13). Upstream of the flame (13), a catalyst arrangement (1) is provided through which an air/pilot fuel mixture (4), separate from the air/fuel mixture, is flowable.

Abstract: The present invention relates to a method for mixing at least two separate fluid flows (2, 3), in particular for a burner of a power plant. To improve the mixing, a plurality of swirl flows (7, 8), which are annular and concentric with respect to a longitudinal center line (6), are generated from the fluid flows (2, 3), in such a manner that radially adjacent swirl flows (7, 8) have opposite directions of rotation.

Abstract: A mixer for mixing first and second fluids has a passageway along which a stream comprising the first fluid flows along an axis of the passageway. The passageway has, in sequence in the downstream direction, a convergent section, a throat, and a divergent section. An injector introduces the second fluid into the stream in the passageway upstream of the divergent section. A swirl generator in the passageway is upstream of the convergent section.

Abstract: A catalyzer has a plurality of plane sheets arranged superposed and spaced apart from each other in a stack, between which a plurality of straight channels extend parallel in the flow direction and are delimited by the plane sheets. The plane sheets are coated in such a way that a catalytic coating is present in all channels; that the catalytic coating is limited to predetermined sections of the channels; and that inside the channels, uncoated sections in each case are positioned opposite to sections with the catalytic coatings. The uncoated sections absorb the heat radiation emitted by the catalytic coatings during operation, thereby improving cooling and preventing homogeneous ignition.

Abstract: The present invention relates to a catalyst (1) for combustion of at least a portion of a gaseous fuel-oxidant mixture flowing through the catalyst (1), in particular for a burner of a power plant. An inlet sector (5) comprises inlet channels (9). A succeeding sector (6) comprises succeeding channels (10). The succeeding channels (10) have smaller internal cross-sectional areas than the inlet channels (9). To improve the production of the catalyst (1), the invention proposes channels (3) which extend through the inlet sector (5) and through the succeeding sector (6) and have the internal cross-sectional area of the inlet channels (9). The inlet channels (9) are formed by portions of the channels (3) lying in the inlet sector (5).

Abstract: The present invention relates to a hybrid burner (1) for a combustor (7), in particular of a power plant, comprising a housing (2), in which a full oxidation catalyst (9) and a partial oxidation catalyst (10) are arranged. An inlet side of the housing (2) is connected to at least one oxidizer supply (3) and to at least one fuel supply (4, 5). An outlet side of the housing (2) is connected to a combustion chamber (7).

Abstract: In a combustion method, in a burner (12, 20), a fuel/air mixture flowing through a flow passage (13) is made to react in a first combustion stage in a catalytic reactor (15), and downstream of the catalytic reactor (15) fuel is burnt together with the exhaust gas from the catalytic reactor (15) in a second combustion stage to form a homogenous flame (17) by self-ignition. If the fuel from the fuel/air mixture is only partially burnt in the first combustion stage in the catalytic reactor (15), and the unburnt remainder of the fuel is burnt in the second combustion stage, combustion can be stabilized by virtue of the fact that the fuel-containing exhaust gas from the catalytic reactor (15), between the outlet of the catalytic reactor (15) and the homogenous flame (17) is passed through devices 916, 19) which aerodynamically stabilize the homogenous flame (17).

Abstract: A catalytic reactor for generating a hydrogen-containing synthesis gas from a rich fuel/oxidizing agent mix. The reactor (1) includes a multiplicity of parallel passages which extend from an inlet side (6) to an outlet side (7). To achieve a compact overall form of the reactor (1), at least in a core region of a cross section through the reactor (1) all the passages are of a catalytically active nature. In a first longitudinal part (8) of the reactor (1), which includes the inlet side (6), the catalytically active first passages have a larger proportion of the surface area provided with a catalytically active coating than the catalytically active second passages in a second longitudinal part (9) of the reactor (1), which includes the outlet side (7) and adjoins the first longitudinal part (8).

Abstract: In a combustion method, in a burner (12, 20), a fuel/air mixture flowing through a flow passage (13) is made to react in a first combustion stage in a catalytic reactor (15), and downstream of the catalytic reactor (15) fuel is burnt together with the exhaust gas from the catalytic reactor (15) in a second combustion stage to form a homogenous flame (17) by self-ignition.

Abstract: The invention relates to a catalyzer for burning at least part of a fuel/oxidant mixture flowing through the catalyzer, in particular for a burner of a power plant installation. The catalyzer comprises several catalytically active channels and several catalytically inactive channels. A longitudinal section of the catalyzer is spaced apart from an inflow side in the main flow direction. In this longitudinal section turbulators are arranged in at least several catalytically active channels. In addition or alternatively, connections that enable a flow between the channels are formed in this longitudinal section between several adjoining channels.

Abstract: A device for burning a gaseous fuel/oxidant mixture, in particular for a power plant installation, includes a catalyzer/swirl generator arrangement. Part of the fuel/oxidant mixture is burned in the catalyzer/swirl generator arrangement and the catalyzer/swirl generator arrangement generates a swirl flow. The catalyzer/swirl generator arrangement includes several flow channels, of which some are constructed catalytically active and others catalytically inactive. The flow channels can be arranged distributed around a longitudinal central axis of the catalyzer/swirl generator arrangement, and can be slanted relative to the axis.

Abstract: A catalyzer has a plurality of plane sheets arranged superposed and spaced apart from each other in a stack, between which a plurality of straight channels extend parallel in the flow direction and are delimited by the plane sheets. The plane sheets are coated in such a way that a catalytic coating is present in all channels; that the catalytic coating is limited to predetermined sections of the channels; and that inside the channels, uncoated sections in each case are positioned opposite to sections with the catalytic coatings. The uncoated sections absorb the heat radiation emitted by the catalytic coatings during operation, thereby improving cooling and preventing homogeneous ignition.

Abstract: The present invention relates to a device for burning a gaseous fuel/oxidant mixture (4), in particular for a power plant installation, comprising a catalyzer/swirl generator arrangement (2), in which part of the fuel/oxidant mixture (4) is burned and which generates a swirl flow (6).

Abstract: The invention relates to a process for producing hot combustion waste gases (11), in particular for a gas turbine system. In a burner (2), a combustion that produces hot combustion waste gases (11) takes place. A portion (17) of the combustion waste gases (11) is branched off and fed to a first inlet (16) of an oxygen separation device (5). An oxygen-containing gas (20) is fed to a second inlet (23) of the oxygen separation device (5). The oxygen separation device (5) is provided with oxygen separation means (6) that remove oxygen from the oxygen-containing gas (20) and feed it to the branched-off waste gas (17), producing oxygen-containing gas (34) whose oxygen content has been reduced as well as oxygen-enriched, branched-off waste gas (25). The oxygen-enriched, branched-off waste gas (25) as well as a fuel (31) or a fuel/steam mixture are fed to the burner (2) and form a combustion mixture that burns in the burner (2) while forming the hot combustion waste gases (11).

Abstract: The invention relates to a catalyzer for burning at least part of a fuel/oxidant mixture flowing through the catalyzer, in particular for a burner of a power plant installation. The catalyzer comprises several catalytically active channels and several catalytically inactive channels. A longitudinal section of the catalyzer is spaced apart from an inflow side in the main flow direction. In this longitudinal section turbulators are arranged in at least several catalytically active channels. In addition or alternatively, connections that enable a flow between the channels are formed in this longitudinal section between several adjoining channels.

Abstract: A catalyzer for burning part of a gaseous fuel/oxidant mixture, in particular for a burner of a power plant installation, has catalytically active channels and catalytically inactive channels and at least two sectors are arranged consecutively in the main flow direction. The sectors include a first sector defining an inlet sector and at least one following sector that includes one or more of a mixing sector arranged downstream from the inlet sector and an outlet sector. Further, the catalyzer has one or more of a smaller flow resistance in the inlet sector than any following sector, a higher catalytic activity in the inlet sector than any following sector, a plurality of holes in the mixing sector oriented transversely to the main flow direction and through which adjoining channels communicate, and a swirl generator in the outlet sector that provides a swirl to a gas mixture flowing through the outlet sector.

Abstract: A process produces hot combustion waste gases, in particular for a gas turbine system. In a burner, a combustion produces hot combustion waste gases. A portion of the combustion waste gases is branched off and fed to a first inlet of an oxygen separation device. An oxygen-containing gas is fed to a second inlet of the oxygen separation device. The oxygen separation device is provided with at least one oxygen separation means that removes oxygen from the oxygen-containing gas and feeds it to the branched-off waste gas, producing an oxygen-containing gas whose oxygen content has been reduced as well as an oxygen-enriched, branched-off waste gas. The oxygen-enriched, branched-off waste gas and a fuel or a fuel/steam mixture are fed to the burner and form a combustion mixture that burns in the burner while forming the hot combustion waste gases. In order to improve the efficiency of such a method, the burner contains a catalyzer that initiates and/or stabilizes the combustion.