Objetivo The aim of this research project was to investigate ways of reducing NOx flame emission in iron and steel industry furnaces by injecting water in liquid or steam form.Numerous investigations into the formation of nitrogen monoxide (among others) have shown that the emission of nitrogen monoxide from gas burners or gas-fired furnaces is mainly governed by the process parameters listed below:- Combustion air ratio- Furnace chamber temperature- Air preheating temperature- Gas property.Among the aforementioned parameters, the temperatures have a bigger impact on the emission of nitrogen monoxide than the combustion air ratio, for instance. The furnace chamber temperature is seldom optional but mainly depends on the furnace condition and the performance required, thus reducing the possibility of using this parameter to control the emission of nitrogen monoxide. The air preheating temperature, which in recent years has frequently been the objective of energy saving, causes the formation of nitrogen monoxide to increase exponentially in case of overstoichiometric combustion. It has been shown that it is especially the burners used in furnaces of the steelmaking and the ceramic industries with air preheating temperatures above 300 C which tend, because of the high combustion temperatures, to increase the emission of nitrogen monoxide beyond the admissible level laid down, for instance, in the German Air Pollution Control Act. A useful step to reduce the formation of nitrogen monoxide could be the lowering of the combustion temperature.Within the framework of this research project, the flame temperature of a burner type which is frequently used in industrial furnaces is to be reduced by way of enriching the burnable media with water (liquid or steam) as a coolant to such an extent that the emission of nitrogen monoxide is reduced to the maximum possible extent without adversely affecting the combustion itself. Programa(s) ECSC-WORKENV 5C - Fifth research programme (ECSC) "Technical control of nuisances and pollution at the place of work and in the environment of iron and steel works", 1985-1989 Tema(s) 1 - Measures to combat air pollution at the place of work, inside plants and in the environment Convocatoria de propuestas Data not available Régimen de financiación Data not available Coordinador THYSSEN STAHL AG Aportación de la UE Sin datos Dirección 47161 Duisburg Alemania Ver en el mapa Coste total Sin datos
