In today's industrial environment that emphasizes energy saving and emission reduction, Waste Heat Recovery Systems (HRSG) are becoming increasingly widespread, especially in processing high-temperature exhaust from gas turbines and diesel generators. As a core component within the HRSG system, the performance of the duct burner directly impacts the overall thermal efficiency and operational stability. Today, let's explore the application of these burners in HRSGs and how to choose a reliable duct burner manufacturer.
What is HRSG and Why is a Duct Burner Needed?
HRSG, or Heat Recovery Steam Generator, is primarily used to recover high-temperature exhaust gases from gas turbines or engines, converting them into steam or hot water for power generation, heating, or industrial processes. However, in actual operation, the exhaust gas temperature can sometimes be too low, or the oxygen content insufficient, leading to suboptimal heat recovery efficiency. This is where the duct burner comes into play.
These burners are specifically designed for low oxygen content (e.g., 11%-12%), high-temperature (500°C-600°C) exhaust environments. They boost the exhaust gas temperature to 700°C-900°C through supplemental firing, significantly increasing steam output and overall system energy efficiency.
Typical Application of Duct Burners in HRSG
Taking the Flubfire series Duct Burner as an example, it employs a modular design allowing various configurations like rectangular, circular, or T-shape based on site space and process needs, offering great flexibility. Each module provides 200kW power in exhaust gas heating mode, with a turndown ratio of up to 10:1 and a maximum flame length of 3.2 meters, ensuring uniform heating of the exhaust gas and avoiding local hot spots.
In a typical gas turbine exhaust treatment process, the burner is usually installed at the HRSG inlet or within the ductwork. It supplements the combustion of low-temperature or low-oxygen exhaust, raising it to the temperature required for subsequent processes. This not only enhances steam production but also ensures stable system operation under varying conditions.
Why Choose a Professional Natural Gas Duct Burner?
In HRSG systems, the Natural Gas Duct Burner is one of the most commonly used types. Its fuel is clean, emissions are low, and it meets environmental standards. For instance, the Flubfire series burner, when using natural gas, emits only 70ppm CO and 75ppm NOx, well below most environmental regulations.
Furthermore, reputable manufacturers design their burners with features like no requirement for a combustion air fan and the use of high-temperature resistant stainless steel, reducing energy consumption and extending equipment lifespan.
How to Select the Right Duct Burner Manufacturer?
Choosing an experienced Duct Burner manufacturer is crucial. The manufacturer should not only provide proven products but also possess customization capabilities and offer comprehensive after-sales service. For example, some manufacturers tailor installation solutions based on parameters like furnace width and exhaust gas velocity (18-22 m/s), providing detailed installation guidance and maintenance recommendations.
During installation, attention must be paid to the distances between the burner, baffle plates, and lining, as well as ensuring no obstructions within 5 meters downstream – key details for ensuring safety and performance.
Conclusion
As industrial requirements for energy efficiency continue to rise, the combination of HRSG systems and high-efficiency duct burners will become a mainstream trend. Selecting a suitable Natural Gas Duct Burner and partnering with a professional duct burner manufacturer can not only enhance system thermal efficiency but also deliver significant economic and environmental benefits for your company.
If you are planning or retrofitting a waste heat recovery system, it's worthwhile to focus on these efficient, low-emission duct burners – they might be the "key component" to achieving your energy-saving goals.
