PI Over Fire Air Designs
Over fire air system
Requires plant specific solutions based on
availability of secondary air supply and the
best elevation for NOx and CO reduction
Compartmentalized OFA design
Typical OFA Designs
Compartmentalized OFA
Finger duct OFA
Common Windbox Conversion
- Compartmentalized windbox and OFA added
- Eastern Instruments H igh-Beta for air flow managenment to each OFA
- Secondary air header added
- Finger duct OFAs
- Dampers and E astern Instruments
- High-Betas for air flow measurement and OFA balancing
Larger OFA ports are used above and outboard of the burners
to more efficiently reduce NOx and CO that tend to flow up the
corners of a boiler.
