At Kodak, the micronized reburn system
was designed by EER using a combination
of analytical and empirical techniques, augmented
by EER’s extensive reburning database.
The reburn fuel and overfire air (OFA)
injection components were designed with a
high degree of flexibility to allow for field
optimization to accommodate the complex
furnace flow patterns in the cyclone boiler.
The micronized coal reburn fuel was provided
by a Fuller MicroMill™ system that
produces micronized coal with a particle
size of approximately 20 microns, about
one third the diameter of normal pulverized
coal. To maximize NOx reduction, the
reburn fuel was injected with flue gas as
the carrier instead of air. The flue gas was
extracted downstream of the electrostatic
precipitator (ESP) and boosted by
a single fan.