利用 FTIR 光谱技术进行烟气排放中气态污染物的在线连续监测研究王霞、张东胜(1. 北京理工大学信息科学技术学院,北京100081;2. 北京化工大学机电工程学院,北京100029)摘要: 本文对利用傅立叶变换红外光谱技术进行烟气排放中气态污染物的在线连续监测进行了初步的研究。采用气体池分析方法确定了常规监测气体的特征吸收波长。由实验光谱数据估计了实际测量系统的主要分析波长范围、相应的采用频率、在线监测需要的最短程长。关键词: FTIR,气态污染物,CEMS,在线监测Research on on-line monitoring of Dissolved Gas-in-Oil with FTIR spectra Research on continuous on-line monitoring of gaseous contaminant in emission using FTIR spectra WANG Xia1 ZHANG Dongsheng2 (1. School of Science and Technology, Beijing Institute of Technology, Beijing 100081; 2. Schoolof Electromechanical Engineering , Beijing University of Chemical Technology, Beijing 100029) Abstract: Initial researches were completed to realize on-line monitoring of gaseous contaminant in emission using FTIR spectroscopy. Gas cell method is used to determine the characteristic absorption peaks of each gas. From the experimental spectra data, the range of analysis wavelength, the corresponding sampling frequency range and the minimum optical length of the gas cell are estimated. Keywords: FTIR, gaseous contaminant, CEMS, on-line monitoring 引言CEMS(Continuous Emission Monitoring System:烟气排放连续监测系统)是用于实时连续监测固定式大气污染源燃烧排放出废气中烟尘(也称颗粒物)、气态污染物(包括SO2、NOX、CO)的浓度及其总量的仪器系统[1] 。CEMS是随社会工业化程度的提高及人类环境意识的加强而提出的,它逐步成为了环境管理的重要工具和手段。当今有各种原理的气态污染物分析仪器用于CEMS,这些技术包括[1] :紫外和红外吸收法、 FTIR、DOAS、化学发光和光声光谱法(PAS)等。其中, FTIR是利用气体的红外特征吸收原理, 通过干涉仪加有限程长的傅立叶变换的形式,通过切趾和相位校正,借助计算机和快速算法, 可在高通量下不受杂散光影响迅速获得全频...