论文部分内容阅读
最新的《火电厂大气污染物排放标准》对烟气中SO2和汞的含量做出了严格的规定。该文利用连续光源并基于差分吸收光谱技术分别对单一组分SO2、气态单质汞Hg0及两者的混合气体进行了实验研究。研究表明:对于单一组分SO2的检测,利用傅里叶变换滤法比最小二乘法的反演精度更高;对气态单质汞Hg0的检测,利用特征波长处最大值法的反演精度从整体上稍高于峰面积法;对SO2及Hg0混合组分的检测,先由傅里叶变换反演SO2浓度,再利用浓度关系曲线反演Hg0。结果表明:对于混合气体SO2反演误差不超过5%,而SO2的存在将对Hg0造成更大的干扰,Hg0的反演误差超过20%。
The latest “Thermal Power Plant Air Pollutant Emission Standards” has strict rules on the content of SO2 and mercury in flue gas. In this paper, single-component SO2, gaseous elemental mercury Hg0 and their mixed gases were studied by using continuous light source and differential absorption spectroscopy respectively. The results show that the retrieval accuracy of Fourier transform filter method is higher than that of least square method for the single component SO2 detection. The detection of gaseous elemental Hg0 using the maximum value method at the characteristic wavelength, On the slightly higher than the peak area method; SO2 and Hg0 mixed component detection, first by Fourier transform inversion SO2 concentration, and then use the concentration relationship curve inversion Hg0. The results show that the error of SO2 inversion does not exceed 5%, while the presence of SO2 will cause more interference with Hg0, and the inversion error of Hg0 exceeds 20%.