Research of combined cooling heating and power systems (8): Haze and DeNOx

Nitrogen oxides is a major cause of haze. Natural gas is clean energy, but the nitrogen oxides in the exhaust of gas CCHP systems always exceeds the limits specified in the national standard and should be addressed. Illustrates the mechanism of the air pollution influenced by nitrogen oxides, presents the related pollutant emission standards of the gas CCHP system, gives the relations between excess air coefficient and oxygen content and between volume concentration and mass concentration of nitrogen oxides, analyses the combustion by-products and reaction mechanisms of nitrogen oxides in the gas CCHP system, and describes the current DeNOx technology of the gas CCHP system. Concludes that dry low nitrogen oxides combustion and iron-based molecular sieve selective catalytic reduction (SCR) are the most advanced DeNOx technology in gas CCHP system.