摘要
针对目前绝大部分便携式烟气分析仪普遍存在的测量值易受粉尘和水汽干扰、零点和量程漂移大、检测下限高、环境适应性差等问题,介绍了一种基于紫外差分吸收光谱技术(DOAS)的便携式低浓度烟气分析仪,在实验室不同的温湿度和振动条件下进行了性能测试。测试结果表明,在温度变化40℃,湿度变化43%,且在垂直半波振动下,SO_2、NO两种气体的零点变化最大值分别为-1.1%F.S.和-0.4%F.S.,量程变化最大值分别为1.4%F.S.和1.7%F.S.,示值误差变化最大值分别为2.8%和1.3%。SO_2浓度值在0~20 mg/m^3之间,测量值的最大偏差为-0.29 mg/m^3,NO浓度值在0~20 mg/m^3之间,测量值的最大偏差为-0.34 mg/m^3。
Focusing on problems commonly existed in most of portable flue gas analyzers at present,such as,measurement interference easily affected by dust and water vapor,obvious zero point and span drift,low detection limit,poor environmental adaptability etc. A kind of portable low concentration flue gas analyzer which is based on Differential Optical Absorption Spectroscopy is introduced. The performance is tested under different conditions of temperature,humidity and vibrationin the lab. Test results show that,when the temperature changes 40 degrees centigrade,the humidity changes 43%,and the vertical half wave vibration is happened,the maximum zero point change of SO2 and NO is-1. 1% F. S. and-0. 4% F. S,the maximum span change is 1.4% F. S. and 1. 7% F. S.,and the maximum indication error change is 2. 8% and 1. 3% respectively. Moreover,when the concentration is between 0 and mg/m3 both for SO2 and NO,the maximum measurement error of SO2 is -0. 29 mg/m3,while the latter is-0. 34mg/m3.
出处
《电力科技与环保》
2017年第5期40-43,共4页
Electric Power Technology and Environmental Protection
基金
国家重大科学仪器设备开发专项(2014YQ060537)
江苏省科技成果转化专项资金项目(BA2016064)
关键词
DOAS
便携式烟气分析仪
低浓度
环境适应性
振动
DOAS
portable flue gas analyzer
low concentration
environmental adaptability
vibration
