基于WM-DAS的原位取样式烟气中CO在线监测  

On-line Measurement of CO in Flue Gas Based on WM-DAS Combined with In-situ Sampling

作　　者：周佩丽 谭文[1] 彭志敏[2] 丁艳军[2] ZHOU Peili;TAN Wen;PENG Zhimin;DING Yanjun(School of Control and Computer Engineering,North China Electric Power University,Beijing 102206,China;Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]华北电力大学控制与计算机工程学院,北京102206 [2]清华大学能源与动力工程系,北京100084

出　　处：《动力工程学报》2020年第8期629-634,共6页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2016YFC0201104)。

摘　　要：针对燃煤机组烟气中CO体积分数波动剧烈的特点,采用WM-DAS方法结合原位取样方式对CO体积分数进行快速在线监测。首先,对WM-DAS方法进行理论推导和实验验证,然后将该装置安装于某燃煤电厂省煤器出口水平烟道,测量腔体安装于烟道内部,在拉法尔喷嘴抽气作用下,烟气经测量腔体前端的过滤器过滤后进入测量腔体实现测量。结果表明:原位取样式CO在线监测装置能够实现CO体积分数高精度快速在线测量;CO体积分数与O2体积分数有极强相关性。Combined with in-situ sampling,the WM-DAS method was used to realize fast on-line measurement of CO volume fraction in flue gas of coal-fired units aiming at its strong fluctuation characteristics.Firstly,the WM-DAS method was theoretically deduced and verified.Then,the corresponding device was installed on the horizontal flue duct at the exit of the economizer in a coal-fired power plant,while the measuring chamber was installed in the flue duct.Under the suction effect of Rafael nozzle,the flue gas entered the measuring chamber after being filtered by the filter in the front of the measuring chamber to realize the measurement.Results show that the on-line CO measurement device based on in-situ sampling can achieve fast and high-precision on-line measurement of CO volume fraction.The CO volume fraction is highly correlated with that of the O2.

关 键 词：WM-DAS 波长标定 透射光强信号重构 同步拟合 原位取样 

分 类 号：TK121[动力工程及工程热物理—工程热物理]