基于不同原理的低浓度二氧化硫分析仪性能研究  

Study on the Performance of Low Concentration Sulfur Dioxide Analyzers Based on Different Principles

作　　者：乔支卫[1,2] 王安琪 张振欣 杨凯 

机构地区：[1]江西师范大学化学化工学院,江西南昌330022 [2]江西省环境监测中心站,江西南昌330077 [3]上海大学环境与化学工程学院,上海200444 [4]中国环境监测总站,北京100012

出　　处：《环境监控与预警》2017年第6期29-32,共4页Environmental Monitoring and Forewarning

摘　　要：为掌握非色散红外吸收光谱法(NDIR)、紫外差分吸收光谱法(DOAS)、非色散紫外吸收光谱法(NDUV)、红外激光吸收光谱法(OFCEAS)测定烟气中低浓度二氧化硫的差异,通过方法比对实验,对基于不同原理二氧化硫分析仪的响应时间、重复性、线性误差、干扰因素等进行研究。结果表明,不同原理的低浓度二氧化硫分析仪在响应时间、线性误差、重复性、漂移等基本性能上均能满足《HJ/T 76—2007》的要求,但不同原理之间性能指标差异也很明显。不同露点温度对基于NDIR和NDUV法的二氧化硫分析仪有正干扰,CO不干扰二氧化硫的测定,CH4对基于NDIR和OFCEAS法的二氧化硫分析仪有正干扰,NH3和HCl对基于DOAS法的二氧化硫分析仪有正干扰。In order to understand the difference between the different analyzers in the determination of low concentration sulfur dioxide in flue gas,which based on Non-Dispersive Infra-Red spectrometry （ ND IR ）, Differential Optical Absorption spectroscopy （ DOAS ）, Non-Dispersive Ultra-Violet spectrometry （ NDUV ） and Optical Feedback Cavity Enhanced Absorption Spectroscopy （ OFCEAS ）, through the method of comparing experiment, w e have conducted the stu d y o n the response time, repeatability,linearity error, interference factors of sulfur dioxide analyzers based on different principles. The results show that, the basicperformance on the different principle of lowccnccntration sulfur dioxide analyzer can meet the requirements of “ H / / T 7 6-2 0 0 7,such as the response time, linear error,repeatability, drift, etc. But there are obvious differenccs between the performance indicators on different principles. Different dew point temperature causes positive interference with ND IR and N D U V analyzer C O does not interfere with thedetermination of sulfur dioxide,CH 4 causes positive interference with ND IR a n d O Fand HCl causes positive interference with DOAS analyzer.

关 键 词：二氧化硫 非色散红外 非色散紫外 紫外差分 红外激光 

分 类 号：X851[环境科学与工程—环境工程]