Due to the current legislation in many countries to reduce emission levels of pollutant species in industrial furnaces, the design of the burner in combination with the design of the cracking furnace has become a critical factor in the eventual successful performance of the furnace after the first start up. In order to arrive to a sound design, detailed knowledge of the parameters influencing NOx-formation as well as those determining the flame and combustion behavior in the total assembly of burners, radiant coils and firebox, is required. To obtain such detailed knowledge, Technip, in close cooperation with Scientific Researchers at the Politechnico di Milano, has developed a CFD-NOx simulator, which allows accurate prediction of flame behavior and NOx and other pollutant emission levels under industrial conditions. Technip and Air Products have successfully applied CFD-NOx simulations on the Air Products'' Ultra-LOW NOx burner (LSV™) installed in two existing industrial steam-reforming furnaces. The LSV™ Burner has also been selected for a Technip designed GK6 ethylene furnace, which is currently in the construction phase. During the engineering phase detailed CFD + NOx simulations have been carried out to study the combustion behavior and to determine expected NOx levels.
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