2020IOP Conference Series Materials Science and EngineeringOpen access

Study on combustion and nitrogen oxide emissions of gas boiler

Yanyan Ji, Songsong Zhang, Kejian Wang, Guoli Qi

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Abstract

Abstract In order to reduce the emission of nitrogen oxides in gas-fired boilers, the effects of excess air ratio and flue gas recirculation on nitrogen oxide emissions during natural gas combustion are studied by numerical calculation. By adding flue gas recirculation, the generation of nitrogen oxides is significantly reduced. When the flue gas recycling rate is 20%, the emission of nitrogen oxides is minimized to about 40 mg/m 3 .

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Abstract In order to reduce the emission of nitrogen oxides in gas-fired boilers, the effects of excess air ratio and flue gas recirculation on nitrogen oxide emissions during natural gas combustion are studied by numerical calculation. By adding flue gas recirculation, the generation of nitrogen oxides is significantly reduced. When the flue gas recycling rate is 20%, the emission of nitrogen oxides is minimized to about 40 mg/m 3 .

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Available abstract

Abstract In order to reduce the emission of nitrogen oxides in gas-fired boilers, the effects of excess air ratio and flue gas recirculation on nitrogen oxide emissions during natural gas combustion are studied by numerical calculation. By adding flue gas recirculation, the generation of nitrogen oxides is significantly reduced. When the flue gas recycling rate is 20%, the emission of nitrogen oxides is minimized to about 40 mg/m 3 .

Key concepts: Flue gas, Flue-gas emissions from fossil-fuel combustion, Combustion, Nitrogen, Boiler (water heating), Nitrogen oxide, NOx, Nitrogen oxides

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