利用吸收光谱技术对SO_2和NO浓度评估的研究

Study of the Evaluation of SO_2 and NO Concentration by Employing the Absorption Spectrum Technology

基于SO2和NO在紫外区域的吸收特性,提出了同时测量两种气体浓度的新方法。实验过程中,完成了SO2独立存在以及SO2和NO2同时存在时的浓度测量,通过处理二者的透射光谱得到了SO2的浓度,建立了SO2气体浓度的测量式,得到了SO2对NO浓度测量的影响。研究中还分析并得到了NO2气体的存在对SO2浓度测量的影响。最后,对一台电站锅炉现场排放的SO2和NO进行了监测,测量结果客观地反映了气体排放浓度的变化规律。与一些传统的商业探测仪器相比,该系统在响应时间,性能等方面有较大的优势,更适合当前电厂废气排放的检测要求。

Based on the absorption characteristics of SO2 and NO in the ultraviolet zone,a new method was presented for simultaneously measuring the concentrations of two gases.During the test,a concentration measurement was completed in the presence of sole SO2 and both SO2 and NO2 simultaneously.By processing both transmission spectrums,the SO2 concentration was obtained and a formula for measuring the concentration of SO2 gas was established.On this basis,the influence of the presence of SO2 on NO concentration was also acquired.In addition,the influence of the presence of NO2 on the measurement of SO2 concentration was also analyzed and obtained.Finally,the on-site SO2 on NO emissions from a utility boiler were monitored,the result of which objectively reflected the variation law of gas emission concentrations.Compared with some traditional commercial detection devices,the system under discussion enjoys a relatively big edge in response time and performance etc.,further satisfying the requirements for monitoring exhaust gas emissions from current power plants.