烟气排放造成了严重的环境污染,其组分复杂和恶劣的检测环境对在线检测带来极大的困难。介绍了基于傅里叶变换红外光谱技术的烟 气多组分在线FTIR监测系统,该系统对烟气气路采用全程180℃伴热方式,并对多次反射池进行高温伴热,解决探测过程中烟气的冷凝和吸 附损耗等问题。该系统可用于烟气中SO2 、HCl、NOx 等多种气体浓度的监测。采用该系统与MCS100FT烟气在线检测系统进行 实时比对实验,测量结果具有良好一致性。实验表明对抽取烟气进行全程高温伴热方式的FTIR在线监测系统可用于烟气中多种气体浓度的测量。

Flue gas emissions is one of major sources of environment pollution. The complex components and bad test environment bring great difficulties for the online detection. The continuous online monitoring system used for the multiple gas components analysis in flue gas which is based on FTIR spectrometer technique is introduced. In this system, the flue gas path is heated, and the multiple reflection cell is also thermostat heated. Those technologies are used to solve the problem of condensation and adsorption of flue gas in the process. The system can be used for the gas concentration monitoring of SO2 , HCl, oxynitride and the other gas in flue gas. A real-time comparison experiment between this system and CEMS was carried out with a good coincidence. The experiment shows that the online monitoring system based on FTIR spectrometer technique can be used in the measurement of concentration of multiple gas components in flue gas.