Crafting Boiler Burners that Meet or Exceed NOx Emission Targets
Thorough mixing of combustion air, fuel, and high volumes of flue gas is a very effective approach to almost eliminate both thermal NOx and prompt NOx.
Nitrogen oxides (NOx) produced during the combustion process contribute to the formation of smog, ozone, and acid rain, causing harm to humans and ecosystems. Stringent regulations are currently proposed for industrial combustion equipment, including boilers, steam generators, process heaters, enclosed combustors, and similar applications.
Premixed combustion provides a simple approach to reduce thermal NOx and prompt NOx formation. In addition, it has numerous other benefits, including enhanced mixing, which can lead to reduced flame volumes and ultra-clean and complete combustion over an extreme range of excess air levels. Furthermore, the enhanced mixing and reduced flame volume, when combined with high rates of internal flue gas recirculation, can enable increased heat transfer, increased throughput, and reduced equipment life cycle costs by mitigating flame impingement on process tubes.