GASDYNAMIC ABATEMENT OF NOX EMISSION FROM INDUSTRIAL NATURAL-GAS JET DIFFUSION FLAMES

The aim of this research was to examine the possibilities of NOx emiss ion abatement from high temperature industrial furnaces by controlling the gasdynamic parameters of natural gas flames. The following parame ters were investigated: air and gas velocity at burner exit, air swirl angle, position of the burner nozzles and air staging. It has been sh own that moderate swirling of the combustion air enhances the level of NOx the lowest NOx emissions are observed for parallel air and gas Bo w burners. It is also demonstrated that to attain successful NOx abate ment it is necessary to realize sufficient mixing of the flue gases wi th the combustion air before the flame temperature reaches its maximum value. The developed burner, enabling successful abatement of the max imum flame temperature, presents a large potential of industrial appli cations as a tool for NOx emission reduction from high temperature fur naces.