烟气在线监测系统在火电厂中的应用

湖北鄂州发电有限责任公司锅炉安装了烟气监测系统。NOX 分析仪的工作原理是利用化学发光法进行测量。当样气进入分析仪器并通过 1个被加热的碳床时 ,由NO2 分子激发态变成基态放出的能量被光电倍增管捕集 ,转化为DC信号 ,用数值输出。SO2 分析仪的工作原理是用 30Hz光的UV光源分别照射进入反应池前、后的样气 ,4个检测器检测能量的改变 ,可得出样气中SO2 的浓度。O2 分析仪的工作原理是利用O2 的强顺磁性 ,来测量样气的磁性灵敏度 ,从而测定O2 的百分比含量。

Application of Flue-gas Continuous Emission Monitoring System in Thermal Power Plants

The boilers in Hubei Ezhou Power Generation Ltd. Com. has been provided with the flue gas monitor system. The working principle of the NO X analyzer is to measure the gas by means of chemical luminescence. As a sample gas runs into the analyzer and through a heated carbon bed, the energy released in the basic status changed from NO 2 activating status is captured by the multiplier phototube and changed into DC signals with digit outut. The working principle of SO 2 analyzer is to expose the sample gases before and after entering into the reaction pool respectively with 30 Hz UV luminous source and 4 detectors will detect the change of energy to obtain SO 2 density in the sample gas. The working principle of O 2 analyzer is to use O 2 strong paramagnetism to measure the magnetic sensitivity of the sample gas to determine the proportion of O 2 content.