CEMP-ET
EI 11C302
1 October 1997
Table 3-13. Comparison of Under-Fired Air and Over-Fired Air
Type of
Primary Chamber Air
Secondary
Dilution
Unit
Under-Fired
Over-Fired
Chamber
Air
Modular
50% - 60%
nil
80 - 100%
100 - 200%
Starved-Air
Modular
-60%
40 - 50%
60 - 100%
50 - 100%
Excess-Air
Water-Wall
80 - 140%
-60%
minimal
minimal
NOTE: The percentage of stoichiometric air given above is based on a S.R. in the gases
leaving the secondary chamber of 1.5-2.0.
3-27