大气与环境光学学报, 2019, 14 (2): 129, 网络出版: 2019-04-03
基于傅立叶变换红外光谱技术的烟气超低排放监测系统应用研究
Application of Ultra Low Emission Gas Monitoring System Based on Technology of Fourier Transform Infrared Spectroscopy
超低排放烟气监测 傅立叶变换红外光谱 多次反射池 光谱仪 ultra low emission gas monitoring Fourier transform infrared spectroscopy multiple reflection cell spectrometer
摘要
中国的大气环境污染形势严峻,地域性大气问题严重,以燃煤为主的火力发电厂、燃煤锅炉等是最主要的SO2、NOx排放源。 现行的燃煤烟气排放标准做了严格规定,从而对烟气连续排放在线监测技术提出更苛刻的要求。基于傅立叶变换红外光谱技术与 伴热式多次反射池技术,研究燃煤电厂SO2、NO污染气体超低浓度检测系统。针对SO2、NO的分子吸收光谱特征, 采用SiC作为光源,选择测量波段1900~2600 nm;采用傅立叶变换红外光谱技术对测量光谱进行处理,与现场两台设备的 测量数据进行分析, SO2、NO气体的相关性良好,满足超低排放烟气监测需求。
Abstract
The problem of China’s atmospheric environmental pollution is grim. Emission source of SO2 and NOx comes from thermal power plants, coal-fired boilers which are based on coal burning. The current standard of coal-fired flue gas emission is strictly defined, so that more stringent requirements of on-line monitoring technology for continuous emission of flue gas are put forward. Based on the method of differential absorption spectroscopy, the analyzer of SO2 and NO pollution gases in coal-fired power plant was studied. According to the absorption spectrum of SO2 and NO, using SiC lamp as the light source, the measurement band of 1900~2600 nm is carried out. By using the least square method, correlation coefficient of two sets of equipment is calculated. As a result, the analyzer can meet the demand of ultra low emission gas monitoring.
朱余, 曹永, 张付海, 佘晶京, 褚天高. 基于傅立叶变换红外光谱技术的烟气超低排放监测系统应用研究[J]. 大气与环境光学学报, 2019, 14(2): 129. ZHU Yu, CAO Yong, ZHANG Fuhai, SHE Jingjing, ZHU Tiangao. Application of Ultra Low Emission Gas Monitoring System Based on Technology of Fourier Transform Infrared Spectroscopy[J]. Journal of Atmospheric and Environmental Optics, 2019, 14(2): 129.