In combined cycle power plants, every degree of exhaust heat counts. To maximize steam production from gas turbine exhaust, many operators turn to duct burners installed in the Heat Recovery Steam Generator (HRSG). However, the exhaust gas leaving the turbine typically contains only 14–16% oxygen, and during peak firing or with certain turbines, that level can drop even further. Conventional burners often struggle in such low‑oxygen environments, requiring costly supplemental air or risking incomplete combustion.
The Fludfire series of HRSG duct burners is engineered specifically to overcome this challenge. Designed for direct installation in the exhaust duct, these burners deliver reliable, clean combustion with oxygen concentrations as low as 9%—without any additional combustion air blower.
（HRSG Duct Burner）
Fludfire duct burners use the residual oxygen present in the turbine exhaust as their sole oxidizer. This eliminates the need for external air fans, simplifying the system and reducing both capital and operating costs. The burners’ advanced fuel‑air mixing and flame stabilization technologies ensure stable ignition and complete combustion even when oxygen levels approach the lower limits of flammability. This makes them ideal for both base‑load and cyclic operation.
Each Fludfire module provides 900 kW of firing capacity, and multiple modules can be combined to meet the exact heat input required. The burners mount directly onto the tube wall of the HRSG duct, minimizing duct modifications and reducing installation time. The compact, modular footprint is particularly advantageous for retrofits where space is limited, and the absence of external ductwork for combustion air keeps the overall system clean and uncluttered.
Gas turbine load changes can cause significant fluctuations in back pressure within the exhaust path. Fludfire burners are designed to maintain flame stability across a wide range of back pressure conditions, ensuring uninterrupted supplementary firing regardless of turbine operating mode. This robustness translates into reliable steam production and improved plant responsiveness to grid demands.
By adding Fludfire duct burners, plant operators can increase steam generation substantially—whether for driving a steam turbine or supplying industrial processes. The additional heat recovered from the exhaust boosts overall combined cycle efficiency, improving fuel utilization and reducing specific CO₂ emissions per megawatt generated. With minimal parasitic load (no combustion air fan), the net gain in useful output is maximized.
（HRSG Duct Burner Manufacturer）
Fludfire duct burners have been deployed in numerous HRSG applications worldwide, demonstrating long service life and low maintenance requirements. Their robust construction and corrosion‑resistant materials ensure reliable performance in the demanding environment of gas turbine exhaust.
If you are looking to enhance the performance of your HRSG with a reliable, low‑oxygen duct burner, the Fludfire series offers a proven solution. Contact our team to discuss your specific requirements or request detailed technical documentation.
