FIR low nitrogen combustion technology

　　FIR low nitrogen combustion technology, also known as direct ultra-low nitrogen burner. At present, the burners in Europe generally implement NOX emission is < 80mg/NM3, in order to adapt to the needs of NOX < 30mg/NM3 in some sensitive areas of China, the European technology generally adopts the flue gas external circulation FGR way, the specific design of each manufacturer is different, but in general is the use of flue gas external circulation and improve the distribution of flame, Avoid high temperature zones. The emission of nitrogen oxides of the burning air pollutants can meet the emission requirements of the sensible areas.

　　FGR technology can achieve ultra-low nitrogen emission, but in low nitrogen transformation, the use of FGR technology has high installation cost, complex pipeline, and influence the output of the boiler (generally reducing the output of the boiler by 10-20%), and low combustion efficiency.

　　FIR technology, is not external facilities and additional equipment, without premixed surface combustion technology, through its own burner can reduce NOX emissions, to less than 30mg/nm3 combustion emissions, suitable for ordinary water pipe or fire tube boiler structure. Also called direct ultra-low nitrogen burner.

　　In addition to national standards, China also has the relevant emission standards, due to the current pollution situation in various regions, the corresponding boiler air pollutant emission standards in various regions, such as Chengdu, Beijing, Shanghai central city on the implementation of nitrogen oxide is less than 30mg/Nm3) stringent requirements, more stringent than the relevant European standards.

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