摘要
CS_(2)在当今化工等领域占据了重要地位,而CS_(2)火灾污染事故危害性极大。通过研究CS_(2)燃烧火焰光谱辐射以探究其火灾污染特性极为必要。搭建了CS_(2)燃烧火焰光谱测试平台,采用黑体辐射源对VSR仪器进行了标定,通过多用途傅里叶变换(VSR)红外光谱辐射仪测试了5,10和20 cm三种燃烧尺度下CS_(2)燃烧的火焰光谱,并通过热电偶测试了整个燃烧时间段内不同燃烧时刻下的火焰温度,以及在火焰上方安装了烟气分析仪对火焰中的燃烧产物浓度进行监测。测量了CS_(2)整个燃烧时间段内火焰温度,以及不同燃烧时间、不同燃烧尺度下的火焰光谱、燃烧产物组分信息。测试结果表明,CS_(2)火焰中主要含有高温SO_(2),CO_(2),CO气体和空气中卷入的H_(2)O分子,并获取了特征污染产物SO_(2)的浓度。由于现有光谱仪测量分辨率有限,室内实验测量的火焰尺度有限,为了能实现火灾在线监测需要建立一个火焰光谱辐射模型来反演CS_(2)火灾时的污染物浓度相关信息。基于HITRAN数据库可知在2.7μm附近为高温水蒸气的发射峰,4.2μm附近特征峰为高温CO_(2)气体的发射峰,4.7μm附近有CO微弱的发射峰,在7.4μm附近特征峰为高温SO_(2)气体的发射峰,并获得了CS_(2)燃烧时产生的SO_(2),CO_(2),CO和H_(2)O气体在火焰燃烧相同温度下的吸收系数,通过计算得到了CS_(2)燃烧时产生的SO_(2),CO_(2),CO和H_(2)O混合气体的透过率与发射率,并结合气体辐射传输方程、气体吸收系数等方程,创建了CS_(2)燃烧的火焰光谱辐射模型。利用该光谱辐射模型反演了不同燃烧时间下特征污染产物SO_(2)的浓度,并与实验测得的数据进行了对比分析。结果表明,该模型精度高,可用于燃烧产物浓度的定量化反演,SO_(2)分子含量在燃烧时间20,40,60和80 s时的反演精度分别是89.5%,82.5%,85.6%和86.5%。为遥感反演CS_(2)型大尺度火灾中燃烧产物的浓度奠
CS_(2) plays an important role in today’s chemical industry and other fields,while CS_(2) fire pollution accidents are extremely harmful.It is necessary to study the fire pollution characteristics of CS_(2) by studying the spectral radiation of CS_(2) combustion flame.Has set up a platform CS_(2) combustion flame spectrum test,this paper adopts from a complete set of VSR instrument calibration blackbody radiation sources,through infrared spectrum radiometer VSR test 5 cm,to 10 cm,20 cm three scales CS_(2) combustion flame spectrum,and through the thermocouple tested the whole combustion flame temperature under different combustion period,and installed over the flame to monitor the quality of flame in the combustion product concentration of flue gas analyzer.The flame temperature during the whole combustion period of CS_(2),the flame spectrum and the composition information of combustion products at different combustion times and scales were measured.The test results show that the CS_(2)flame mainly contains high temperature gases such as SO 2,CO 2,CO and H_(2)O,and the concentration of characteristic pollution product SO 2 is obtained.Due to the limited measurement resolution of existing spectrometers and the limited flame scale measured in laboratory experiments,to achieve online fire monitoring,it is necessary to establish a flame spectral radiation model to retrieve the pollutant concentration-related information in CS_(2)fire.Based on the HITRAN database is near 2.7μm for high temperature and water vapor emission peak,4.2μm for CO 2 emission peak,around 4.7μm is CO faint emission peak,near 7.4μm for SO 2 emission peak.We have gained CS_(2),SO 2,CO 2,CO and H_(2)O gas in the absorption coefficient of the same temperature and calculate mixed gas transmittance and the emissivity,Combined with the gas radiation transfer equation and gas absorption coefficient equation,the flame spectral radiation model of CS_(2)combustion is established.The spectral radiation model was used to invert the characteristic poll
作者
彭吴迪
宁甲练
陈志莉
唐瑾
刘礼喜
陈林
PENG Wu-di;NING Jia-lian;CHEN Zhi-li;TANG Jin;LIU Li-xi;CHEN Lin(College of Environmental Science and Engineering,Guilin University of Technology,Guilin 541006,China;South China Institute of Environmental Sciences,Ministry of Ecology and Environment,Guangzhou 510000,China)
出处
《光谱学与光谱分析》
SCIE
EI
CAS
CSCD
北大核心
2022年第3期672-677,共6页
Spectroscopy and Spectral Analysis
基金
国家自然科学基金项目(21976043)
桂林理工大学科研启动基金项目(GUTQDJJ20172017075)资助。
关键词
二硫化碳
火焰光谱
光谱辐射模型
气体浓度定量反演
CS_(2)flame
Flame spectrum
Spectral radiation model
Quantitative inversion of gas concentration
