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AssigneeALSTOM Technology Ltd
InventorsTimothy Griffin, Andreas Schlegel, Dieter Winkler
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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).
A method for generating steam, in particular ultrapure steam, by introducing a fuel and an oxidizing agent in a stoichiometric ratio into a reaction zone and exothermically reacting them, transferring the hot reaction gases formed into an evaporation zone, introducing water in liquid and/or vapor form into the evaporation zone, the water which is introduced being evaporated and/or superheated as it mixes with the hot reaction gases, characterized in that the steam-containing reaction mixture undergoes catalytic afterburning.
A steam generator for generating steam, in particular ultrapure steam, substantially comprising a combustion and evaporation chamber (2) having a reaction zone (14) for the exothermic reaction of a fuel and an oxidizing agent, and having an evaporation zone (15) for the evaporation and/or superheating of an injected quantity of water, a device for feeding the fuel (4) and the oxidizing agent (5) into the reaction zone (14), an ignition device (1) for igniting at least some of the fuel/oxidizing agent mixture, a device (12) for feeding water (6) into the evaporation zone (15), and an outlet nozzle (7) for the steam-containing reaction mixture, characterized in that a catalytic afterburning chamber (3) is arranged downstream of the reaction and evaporation chamber (2).
Dependencies are inferred from the claim text.