小型燃油锅炉NO_x的排放特征与管理控制

以68台燃油锅炉(≤10.5 MW)NO_x排放实测数据为基础,通过统计分析方法,研究了NO_x的排放特征;通过对比分析,探讨了我国燃油锅炉NO_x排放控制与管理现状,讨论了进一步加强我国燃油锅炉NO_x排放管理控制的可能性与可行性,并提出了相应的管理控制建议。结果表明,NO_x平均排放浓度为318.2 mg/m~3,基于燃料消耗量的平均排放因子为4.4 kg/t,基于燃料发热量的平均排放因子为102.8 ng/J,基于燃料氮含量的平均排放因子为2.1 mg/mg;建议采取分阶段控制的方式,逐步提高NO_x排放限制,从而实现控源减排目标。

Emission characteristics and regulation control of NO_x from oil-fired boilers

The emission characteristics of NO_x were studied by means of statistical analysis method and based on the actual test data of 68 oil-fired boilers,actual capacity of boilers≤10.5 MW. Through contrast analysis, the control and regulation status of NO_x emissions from oil-fired boilers in China were examined. Furthermore, the possibility and feasibility of intensifying regulation control of NO_x emissions from oil-fired boilers in China were also discussed, and some relevant suggestions about regulation control of NO_x emissions were offered. The results indicate that the average emission concentration of NO_x and its average emission factors based on fuel consumption and fuel heating value as well as nitrogen content of fuel are 318.2 mg/m~3 ,4.4 kg/t, 102.8 ng/J, and 2.1 mg/mg, respectively. It is suggested that the NO_x emissions should be restricted stage-by-stage and so the goal of controlling pollution sources and reducing pollutant emission would be achieved progressively.