Flue Gas Recirculation (FGR) & Low NOx Systems
Advanced combustion engineering, staged-air low NOx burner integration, and induced/forced Flue Gas Recirculation (FGR) ducting retrofits engineered to eliminate thermal NOx formation in industrial water tube and firetube boilers.
Engineered Flue Gas Recirculation & Staged Combustion
Saudi Boilers delivers complete low-emission combustion packages to meet stringent Saudi Vision 2030 environmental mandates. By routing a portion of inert, cool flue gas back into the combustion air supply stream, Flue Gas Recirculation lowers peak flame temperatures below the threshold where Thermal NOx is formed.
Flame Temperature Quenching
Inert flue gas acts as a thermal heat sink, suppressing peak flame zone temperatures below 1,540°C to inhibit Thermal NOx.
Parallel Element Servo Control
Independent motorized FGR dampers and variable frequency drive (VFD) blowers synchronized with O2 combustion feedback.
Flue Gas Recirculation & Combustion Technologies
Induced FGR (IFGR)
Draws flue gas directly into the combustion air fan suction port. Simple, highly reliable retrofit requiring minimal structural ductwork changes.
Forced FGR (FFGR)
Utilizes a dedicated high-temperature booster fan to inject up to 25% flue gas into the burner windbox for maximum emission reduction.
Staged-Air & Fuel Burners
Ultra-Low NOx burner nozzles divide air and fuel into primary and secondary reaction zones, delaying peak flame temperature creation.
Digital O2 Trim & CEMS
Zirconia O2 sensing coupled with Continuous Emission Monitoring (CEMS) dynamically trims FGR damper ratios under changing loads.
Guaranteed Compliance with Saudi Environmental Codes
Saudi Arabian industrial facilities in Jubail, Yanbu, and industrial cities must meet stringent stack emissions standards. Every FGR and Low NOx system engineered by Saudi Boilers is guaranteed to satisfy the Royal Commission Environmental Regulations (RCER), National Center for Environmental Compliance (NCECP / GAMEP), and Saudi Aramco Environmental Protection Standards.
Commission a Low NOx & FGR Retrofit Assessment
Connect with our Khobar Headquarters engineering team. We conduct baseline stack gas testing, furnace thermal profiling, and FGR fan sizing proposals to convert your existing boilers into ultra-low NOx compliant assets.
