FGR Flue Gas Recirculation Combustion: By mixing a portion of the flue gas with air and sending it to the combustion chamber for combustion assistance, the mixed combustion air can effectively reduce the temperature and oxygen concentration within the combustion chamber. Since the activation energy required for the combustion reaction between fuel and oxygen is far less than that between oxygen and nitrogen, the fuel first reacts with oxygen. Only when there is excess oxygen does the fuel react with nitrogen to form NOx. However, the lower temperature in the reaction zone significantly slows down the reaction with nitrogen, thus effectively suppressing the formation of thermal NOx.
Through repeated testing and experimentation, Foster Wheeler's Research and Development Center has designed a reasonable furnace structure and size, matched with fully International Brand low-NOx burners, utilizing external FGR flue gas recirculation combustion technology. Combined with our independently developed PLC control system, this ensures that the boiler operates in a more environmentally friendly, energy-efficient, safe, and reliable manner. Test data shows that after adopting flue gas recirculation, the NOx emission concentration of the boiler can be reduced to below 30 mg/Nm³ (O₂ = 3.5%).
Performance advantages of Integrated Condensing Steam Boiler
Ultra-low nitrogen emission: The use of advanced combustion technology and flue gas recirculation system can control nitrogen oxide (NOx) emissions at a very low level to meet strict environmental protection requirements.
High efficiency and energy saving: The condensing device can recover the sensible heat in the flue gas and the latent heat of vaporization after the condensation of water vapor, improve the thermal efficiency of the boiler, and effectively save energy costs.
Compact structure: The integrated design makes the structure of the boiler more compact, with a small footprint, saving space in the boiler room, and also convenient for installation and transportation.
Intelligent control: Equipped with a high-performance PLC programmable controller and touch screen, it has the advantages of high degree of automation and easy operation. It can realize one-button start and stop, automatic adjustment of combustion power, water level control, overpressure and overtemperature alarm and other functions, and can also record the operating status of the boiler in real time, which is convenient for users to monitor and manage.
Safe and reliable: Multiple safety protection devices are set, such as high and low water level protection, overpressure protection, flameout protection, etc., to ensure that the boiler operates under safe conditions and avoid safety accidents.
