Technical Products: (1) Natural Gas Metal Fiber Surface Combustion Technology; (2) Natural Gas Combustion Flue Gas Recirculation Burner Experimental Platform; (3) Natural Gas Combustion Gas-Air Ratio Precise Control System. Solutions: Low Nitrogen Combustion Technology, which achieves low nitrogen emissions from boilers through full premixed metal fiber surface combustion. By adding flue gas recirculation technology on the basis of metal fiber surface combustion, it meets relevant emission standards while achieving combustion with a low excess air coefficient, reducing boiler smoke loss and improving boiler efficiency. Through real-time monitoring and feedback of flue gas oxygen concentration, it realizes real-time precise control of the gas-air combustion ratio. Energy Saving Products: Metal Fiber Surface Burners; Flue Gas Recirculation Combustion Test Platform; Air-Fuel Ratio Precise Control System; Related Technologies: Metal Fiber Surface Combustion Technology; Flue Gas Recirculation Low Nitrogen Combustion Technology; Oxygen Feedback Air-Fuel Ratio Precise Control Technology; Technological Innovation: Achieved experimental research on flue gas recirculation across multiple operating conditions, laying a solid theoretical foundation for the application of this technology in engineering; through an oxygen feedback natural gas combustion air-fuel ratio control system, it is possible to achieve real-time and precise adjustment of the air-fuel ratio, ensuring the high efficiency and stability of the boiler. Energy Saving Effect: By using flue gas recirculation technology, low-nitrogen combustion of the burner can be achieved. Under the same emission conditions, it allows for low excess air coefficient combustion, thereby improving boiler efficiency; through precise control of the air-fuel ratio, it is possible to achieve real-time and precise control of the excess air coefficient during the combustion process of the burner, ensuring the boiler operates efficiently in real time.