Reduction of NOx formation under the limit combustion conditions through the application of combined primary deNOx methods on the gas boilers

摘要

The article deals with the issue of reducing the formation of nitrogen oxides in the boundary conditions of combustion. These conditions occur at a high thermal load of the combustion chamber, while the amount of nitrogen oxides increases exponentially according to the Arrhenius formula. Due to this, special attention must be paid to the combustion of natural gas, especially because there is a constant demand for minimizing the formation of pollutants. The simulation model of a steam boiler with 4 industrial gas burners (heat output of each is 17.8 MW) and the high thermal load of the combustion chamber (0.59 MW.m-3) is presented in the paper.Simulation modelling and subsequent experimental measurements on a real object show how classical primary de-NOx methods manifest themselves under extreme thermal loads. The result of the research is a significant reduction in NOx production, which was achieved by a combination of primary methods.