| 摘要 |
<p>A method for operating a coal dust furnace with reduced formation of nitrogen oxides, comprising the steps of: blowing into the furnace a first mixture of air and coal dust; blowing into the furnace a first stream of combustion air surrounding the first mixture; blowing into the furnace a second mixture of air and coal dust surrounding the first stream of combustion air; and blowing into the furnace a second stream of combustion air surrounding the second mixture. The coal dust of one of said mixtures comprises combustion coal dust whose range of grain sizes has an upper limiting grain size, the coal dust of the other mixture being temperature-reducing coal dust whose range of grain sizes lies essentially above the upper limiting grain size of the combustion coal dust. And, burning the temperature-reducing coal dust in an afterburning area of the furnace. And a furnace in which this method is carried out.</p> |
