ESTIMATING THE CONCENTRATION OF NITROGEN OXIDES IN COMBUSTION PRODUCTS

Abstract

This article describes methods allowing to project formation of nitrogen oxides in combustion products of gaseous fuels. The authors claim to have obtained the values of projected concentrations of nitrogen oxides in exhausting gases resulting from burning natural gas in burners using different fuel and air mixing techniques. Other conditions being equal, burners with open torches – plate flame burners (ВPF), radiation burners (BR) and improved fuel mixing burners generate the minimum content of nitrogen oxides in combustion products. Burners without pre-mixing of fuel and air generate a slightly higher content of nitrogen oxides. Injection burners generate the most toxic smoke gases. Heated combustion air increases the oncentration of oxides in the smoke two to three times. Calculations made in accordance with the methods designed for high temperature furnaces coincide within the range of 5 to 7 %, for low temperature furnaces – at 20 and more %. If the combustion air is highly heated the gap is larger.