Applicability of Secondary Denitrification Measures on a Fluidized Bed Boiler

This article compares performance of selective catalytic reduction (SCR) and non-catalytic (SNCR) applied on the same pilot unit, a 500 kW fluidized bed boiler burning Czech lignite. Correlation denitrification efficiency normalized stoichiometric ratio (NSR) is investigated. The fundamental principle SCR SNCR similar with reaction scheme. difference in use catalyst that lowers activation energy key reaction. As result, performed method at lower temperatures. During experiments, NSR was up to 1.6 for method. For method, which has higher reducing agent consumption, maximum reached about 2.5. both secondary methods during experiments exceeded 98 % together primary measures, an 58 %.