Return flue gas is redirected through a helical coil and cavity to recover heat, improving burner efficiency while keeping emissions low.
A cooled recirculation vortex reaches the heat exchanger to prevent hydrogen flashback while maintaining stable combustion and lower NOx.
CO2-rich recirculated gas carries oxygen into grate combustion, raising exhaust CO2 concentration while limiting thermal load and flue gas volume.
Staged fuel jets and radial impact structures boost internal flue gas recirculation to cut NOx while preserving flame stability and turndown.
Humidity and temperature sensing in the combustion air path helps gas heaters correct recirculation effects, detect leaks, and stabilize emissions.
Distributed drive nozzles and a mixing chamber recirculate only the needed exhaust gas to cut NOx while keeping hydrogen burner flames stable.
A compact burner integrates suction, fume return, and heat exchange to lower NOx and noise without major flue modifications.