摘要
介绍了一种实时监测化工厂区域污染气体浓度分布情况的新方法,即太阳掩星法傅里叶变换红外光谱技术(SOF-FTIR),建立了复杂条件下获取背景谱、测量谱和污染区域周边大气透过率谱的简化模型。通过对欲监测污染源区域周边做闭合环路连续测量以获得测量光谱,最终应用非线性最小二乘拟合算法对污染源区域污染气体的柱浓度信息进行反演,并运用此方法对某化工厂区域二氧化硫气体的浓度分布情况进行了测定和分析。相对于传统的FT-IR监测方法,该方法操作简单、机动性强,在污染气体区域监测以及其他污染源污染排放应急监测等应用领域具有良好的应用前景。
A new method is introduced to real-timely monitor the pollution gas discharge of chemical plant.The method is called Fourier Transform Infrared Spectrometry based on the Solar Occultation Flux technique（SOF-FTIR）.A simplified model is also proposed to obtain background spectrum,measurement spectrum and atmospheric transmittance near the pollution gas.Measurement spectrum is obtained by continuously measuring the contaminated areas at a closed-loop manner.And density column of pollution gas is achieved by using the nonlinear least squares fitting algorithm（NLLS）.Using this method,remote sensing experiments of SO2 discharge around a chemical plant were made.Compared with traditional FTIR methods,this method is featured with convenient operation and high maneuverability,so it has a good application prospect in pollution monitoring and other contingency measurement applications.
出处
《激光与红外》
CAS
CSCD
北大核心
2010年第10期1071-1075,共5页
Laser & Infrared
基金
国家"863"计划资源环境技术领域重点课题项目(No.2007AA061504)资助
