Method for reducing NOx emissions during the combustion of pulverized fuel

摘要

To further reduce the resulting in the combustion of carbonaceous fuel NOx emissions, an increased NO primary formation rate in the combustion of carbonaceous fuel by means of a power plant burner of a steam generator with gradual supply of an oxygen-containing oxidant and generating a plasma in the burner side of the fuel pyrolysis and / or Fuel ignition are generated during the firing operation of the power plant burner. This is achieved by supplying to the fuel stream in the burner-side region of the fuel pyrolysis and / or fuel ignition and / or the region of a stable burner flame in the fuel pyrolysis and / or the fuel combustion at the NO formation involved highly reactive radicals, which by means of a plasma generating device ( 2) are generated in this area or these areas of the power plant burner by supplying a working gas (3) or additional gas forming this radical into the plasma generating area of the plasma generating device (2), wherein the plasma generating device (2) comprises water vapor or a water vapor-containing gas and / or, in particular, technical pure, oxygen is supplied as working gas (3) and / or additional gas and transferred to the plasma state / will be.