Boiler Ancillaries and Auxiliary Equipment
A boiler cannot operate efficiently or safely as an isolated pressure vessel. Its performance depends on equipment that handles feedwater, fuel, air, flue gas, steam, condensate, ash, emissions and controls.
| System | Main Equipment | Purpose |
|---|---|---|
| Feedwater | Pumps, deaerator, heaters, economiser | Supply clean water at required pressure and temperature |
| Air and gas | FD, ID, PA fans, APH, ducts, chimney | Support combustion and evacuate flue gas |
| Fuel | Burners, mills, stokers, feeders | Prepare and deliver fuel |
| Steam | Superheater, separator, PRV, traps | Condition and distribute steam |
| Emissions | ESP, bag filter, scrubber | Reduce particulate and gaseous pollutants |