The project goal was to achieve
50% or greater NOx reduction at full
load by reburning with the same coal
as the primary fuel, with no substantial
adverse impact on other emissions
or on boiler reliability, operability, and
steam production rate. Adding coal
reburning to Unit 2 required the installation
of four B&W S-type reburn burners,
four B&W dual zone OFA ports, and
a B&W MPS-67 pulverizer and primary
air fan plus the necessary ducting, dampers,
and monitors. Modifications were also
made to the control system. Coals burned
during the test were Illinois Basin (Lamar)
bituminous (1.15% sulfur, 1.24% nitrogen)
and Powder River Basin (PRB) subbituminous
(0.27% sulfur, 0.55%
nitrogen).