紫外差分法烟气检测研究

Study on the detection of the flue gas by the method of ultraviolet detection

差分吸收光谱技术(DOAS)具有灵敏度高、响应快速、测量准确等特点,是大气环境监测重要技术方法。本文分析了差分吸收光谱技术(DOAS)气体测量原理,研究了基于差分吸收光谱技术(DOAS)的气体浓度反演算法,探讨了单组份测量中实际差分吸收截面的获取方法,并在实验室条件下对SO2不同浓度样气进行了测试和浓度反演,反演浓度值与标准浓度值有较好的一致性。

Differential optical absorption spectroscopy (DOAS) is an main technical method for atmospheric environmental mon-itoring, which has the characteristics of high sensitivity, fast response and accurate measurement. In this paper, The measurement principle of difference optical absorption spectroscopy (DOAS) and the inversion algorithm of gas concentration will be introduced, and the method for obtaining differential cross section in one component measurement will be discussed. and under the laboratory conditions of SO2 concentration of different kind of gas of test and concentration inversion, the inversion concentration values in good agreement with the standard concentration values. The concentration measurement results of SO2 show that the inversion con-centration and the standard concentration has good consistencies.