Replace Older Burners. The burner feature offering the largest emissions improvements is flue gas recirculation (FGR), which is available as a retrofit option or as part of a new burner configuration. FGR reduces peak flame temperatures, therefore reducing NOX generation.
Install an Economizer. An economizer is a relatively simple step toward an energy-efficient boiler room. An economizer transfers heat from the flue gas to incoming feed water. By recovering waste heat, an economizer can often reduce fuel requirements by 3 percent to 5 percent or more, depending on conditions.
Optimize Fuel/Air Ratio. Retrofitting your boilers with parallel positioning systems is relatively easy and will improve efficiency and reduce costs. Boilers that incorporate this feature can hold closer tolerances on the oxygen levels in the combustion process, ensuring complete oxidation and higher overall efficiency.
- Utilize Variable-Speed Drives (VSDs). Also called variable-frequency drives, VSDs allow a motor to operate only at its required speed rather than a constant RPM level. This speed variance results in the elimination of unnecessary energy consumption. A VSD can be used on any motor but is most common on pumps and combustion air motors above 5 hp.