Performance analysis and catalyst selection of SCR DeNOx technology in large coal-fired boilers

Nitrogen oxides (NOx) are one kind of harmful substances causing serious pollution on atmospheric environment. Characteristics of NOx from coal-fired utility boilers are massive and lean. In this paper, large coal-fired boilers were chosen as the object, NOx formation mechanism and control were studied, and comparative analyzed adaptabilities of deNOx technologies. SCR deNOx technology was a major technique used to control NOx emissions. Through analysis, factors which the SCR deNOx catalyst choice must be considered and affecting SCR DeNOx catalyst failure factors were gotten, which provided the theory basis for SCR deNOx catalyst´s choice of the large-scale coal-fired boiler.