基于DOAS方法烟气中NH_3对NO浓度测量的干扰补偿  

Compensation Method of NH_3 Interference in NO Concentration Measurement in Flue Gas Based on DOAS

作　　者：许康[1] 王一红[1] 周宾[1] 汤光华 韩少鹏 程禾尧 李可[1] XU Kang WANG Yi-hong ZHOU Bin TANG Guang-hua HAN Shao-peng CHENG He-yao LIKel(School of Energy and Environment, Southeast University, Nanjing 210096, China Nanjing Guodian Environmental Protection Technology Co., Ltd. , Nanjing 210061, China)

机构地区：[1]东南大学能源与环境学院,江苏南京210096 [2]南京国电环保设备有限公司,江苏南京210061

出　　处：《仪表技术与传感器》2016年第12期121-125,144,共6页Instrument Technique and Sensor

基　　金：国家重大科学仪器设备开发专项资助项目(2014YQ06053701)

摘　　要：基于紫外差分光谱（DOAS）技术,针对烟气中NH_3与NO共存的现象,研究不同浓度与温度下NH_3在223~228 nm波段的吸收规律。通过插值获取单位浓度NH_3对NO干扰的基础光谱数据库,根据NH_3不同温度下的差分吸收截面峰值与180℃的差分吸收截面峰值之比同温度的对应关系拟合温度补偿函数。利用这两个补偿函数分别对不同浓度与温度下NH_3和NO的混合气体进行实验研究。结果表明：使用提出的校正方法可以有效地消除NH_3对NO浓度反演的影响。Considering the coexistence of NH3 and NO in flue gas, the differential absorbance characteristics of NH3 at differ- ent concentration and temperature in 223 - 228 nm were studied based on differential optical absorption spectroscopy （DOAS）.It used the interpolation algorithm to obtain the spectral database of the unitconcentration of NH3 on NO and it used the relation between temperature and the ratio of the peak of differential absorption cross section in different temperature to 180℃ to fit temperature compensation function.Experimental researches were carried out with different mixture of NH3 and NO.By utilizing this two compensation function, results are shown that it can perfect revise the influence of NH3 on measuring NO using the proposed method.

关 键 词：DOAS 氨气 一氧化氮 浓度反演 温度补偿 

分 类 号：TK314[动力工程及工程热物理—热能工程]