Abstract: Method for generating steam, in particular ultrapure steam, and steam generator The invention relates to a method and a steam generator for generating steam, in particular ultrapure steam, by reacting a stoichiometric mixture comprising a fuel, in particular hydrogen, and an oxidizing agent, in particular oxygen, and injecting water into the hot reaction gases, which is distinguished by a high purity of the steam generated. The object of providing a method for generating an ultrahigh purity steam is achieved, according to the invention, by two-stage combustion, in that the reaction mixture which is generated in a first combustion and evaporation stage is subjected to catalytic afterburning. A steam generator is distinguished by the fact that a catalytic afterburning chamber (3) with a through-flow body (16) is arranged downstream of the combustion and evaporation chamber (2).

Abstract: The invention relates to a premix burner with high flame stability for use in a heat generator, preferably in the combustion chamber of a gas turbine. Modern, lean-operated premix burners enable very low noxious emissions, but sometimes operate very close to the extinction limit. To increase the stability of the lean premix combustion by increasing the distance between flame temperature and extinction limit temperature the invention proposes to equip the burner in the mixing zone (200) with a net-like structure (201) for the premixing of combustion air and fuel. According to a preferred embodiment, the net-like structure (201) consists of a plurality of layers of individual wire mesh fabrics (202) arranged at a distance from each other. The wire mesh fabrics (202) are preferably equipped with an oxidation-promoting, catalytically active surface.

Abstract: In a power generation plant having at least one gas turbine cycle with heat-recovery boiler (4) and at least one steam turbine cycle operated via the heat-recovery boiler (4), the gas turbine cycle being designed to be semi-closed and essentially free of emissions and essentially comprising a compressor (1), a combustion chamber (2) arranged downstream of the compressor (1), a gas turbine (3) arranged downstream of the combustion chamber (2), a heat-recovery boiler (4) arranged downstream of the gas turbine (3), and at least one generator (8) coupled to the gas turbine (3), modes of operation with the gas turbine cycle stopped and start-up using fresh air are made possible by first means (12) being arranged which alternatively or additionally allow hot gas to be fed into the hot-gas path (23) between gas turbine (3) and heat-recovery boiler (4), and by second means (15) being arranged which alternatively or additionally allow exhaust gas to be expelled from the exhaust-gas path (40) downstream of the heat-rec

Abstract: The present invention relates to a burner, substantially comprising a swirl generator for a combustion air stream and means for introducing fuel into the combustion air stream, the swirl generator having combustion-air inlet openings for the combustion air stream that enters the burner, and the means for introducing fuel into the combustion air stream comprising one or more first fuel feeds having a group of first fuel outlet openings, arranged distributed around the burner axis at a combustion chamber-side end of the burner. The burner is distinguished by the fact that the one or more first fuel feeds having the group of first fuel outlet openings are mechanically decoupled from the swirl generator. The present burner allows reliable and safe use of synthesis gas in both dilute and undiluted form as fuel.

Abstract: A gas turbine plant with a compressor, a combustion chamber, a turbine and at least one heat sink is operated with a working medium in the form of a carbon dioxide/water mixture. A hydrocarbon reacts as fuel with oxygen in the combustion chamber, and the excess carbon dioxide and water thereby occurring is tapped from the circuit. The compressor and the turbine have in each case a rotor with moving blades and a casing with flow ducts and with guide blade cascades. In the compressor and/or the turbine, matching to the expansion behavior of the working medium, which is different from that of air, is brought about by modifications of the flow ducts, of the moving blades and/or of the guide blade cascades.

Abstract: In a method for the operation of a power plant with a closed or quasi-closed cycle, the power plant substantially comprises at least one compressor unit (1) or a pump, at least one combustion chamber (2), at least one turbine (3) and at least one heat sink (4). In the combustion chamber (2), a fuel mass flow (14) reacts with at least one oxygen flow (12), the excess combustion products which are formed as a result (CO2, H20) are removed from the cycle at a suitable location (5, 6), and the oxygen stream (12) fed to the combustion chamber is obtained by means of an air fractionation installation (11). Means (9) for coarse fractionation of the supplied air (8) are connected upstream of the air fractionation installation (11) in order to supply oxygen-enriched air (10) to the air fractionation installation (11).

Abstract: The invention relates to a method and a steam generator for generating steam, in particular ultrapure steam, by reacting a stoichiometric mixture comprising a fuel, in particular hydrogen, and an oxidizing agent, in particular oxygen, and injecting water into the hot reaction gases, which is distinguished by a high purity of the steam generated.

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: The invention relates to a catalytic burner (1) of a combuster (2), in particular of a power station installation, comprising an annular duct (4) leading to the combuster (2), a catalyzer (5) arranged in the annular duct (4), a primary injection device (7) for injecting a fuel into the annular duct (4) upstream of the catalyzer (5), a secondary injection device (3) for directly injecting a fuel into the combuster (2). To stabilize a recirculation zone (29) in the combuster (2), a swirl generation device (6) is provided, which is arranged in the annular duct (4) downstream of the catalyzer (5) and subjects a flow through the catalyzer (5) to a swirl.

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 invention relates to a premix burner with high flame stability for use in a heat generator, preferably in the combustion chamber of a gas turbine. Modern, lean-operated premix burners enable very low noxious emissions, but sometimes operate very close to the extinction limit. To increase the stability of the lean premix combustion by increasing the distance between flame temperature and extinction limit temperature the invention proposes to equip the burner in the mixing zone (200) with a net-like structure (201) for the premixing of combustion air and fuel. According to a preferred embodiment, the net-like structure (201) consists of a plurality of layers of individual wire mesh fabrics (202) arranged at a distance from each other. The wire mesh fabrics (202) are preferably equipped with an oxidation-promoting, catalytically active surface.

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: The invention relates to a catalytic burner (1) of a combuster (2), in particular of a power station installation, comprising

Abstract: A catalytically operating burner with a catalyzer structure (4), useful in particular for a gas turbine system, has a heat-resistant carrier material (10) that forms the walls of several adjoining channels (13). The channels (13) pervade the catalyzer structure (4) in longitudinal direction and permit that a gaseous reaction mixture flows through the catalyzer structure (4). The walls are coated at least in part with a catalyst. In order to improve the catalytic conversion within the catalyzer structure (4), communicating openings (14) are constructed in the walls between an inlet end and an outlet end of the catalyzer structure (4). Adjoining channels (13) are able to communicate with each other through the communicating openings (14).

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.

Abstract: In a method for the cooling of guide vanes and/or moving blades in the turbine stages of a gas turbine plant, a cooling medium, which contains a first fuel, is fed through the interior of the guide vanes and/or moving blades to be cooled and, using a catalyst, undergoes an endothermal chemical process therein in which the first fuel is converted at least partially into a second fuel. The cooling medium containing the second fuel is used as fuel for driving the gas turbine plant after the cooling medium has flowed out of the guide vanes and/or moving blades. In such a method, a high effectiveness of the cyclic process is highly effective and the cooling of the vanes/blades is simultaneously improved. The first fuel is a methane-containing gas, in particular natural gas, and a mixture of the first fuel with steam is used as the cooling medium and leads to a reforming of the methane in the endothermal chemical process.