烟气连续在线监测系统CEMS的设计与研究

摘要

With people's continuously increasing awareness of environmental protection, there has been a strong demand in China for the monitor of air pollution,especially for the monitor of gas emission from main flue gas emitters power plants.Traditional flue gas monitoring system is slow, inefficient and measuring single species, in this paper, a fast, multi-component, remote monitoring method is presented. The multicomponent quantitative measuring mathematical model based on FT-IR is established in this system.The infrared spectra is automatically acquired and calculated by programming, and the results is transmitted automatically through the network to the environmental protection agency and the control room. The system measurement range and efficiency is much better than the traditional flue gas moni-toring system by comparison. The results showed that the application of Fourier transform infrared analysis has a high sensitivity,high accuracy,good repeatability,and broad application prospects in the field of flue gas continuous analysis.%随着人们环境保护意识的不断增强，国内对于大气污染的监测特别是对主要烟气排放大户如发电厂等的烟气在线监测要求日益提高。针对传统烟气监测系统响应速度慢、效率低、测量种类单一等问题，本文提出了一种能够快速、多组分、精确测量烟气成份的远程监控方法。首先建立了以FT-IR为基础的多组份定量测量的数学模型，通过编程实现计算机自动采集红外光谱图，自动进行烟气组份的定量计算，并自动将测量结果通过网络送至环保局和电厂控制室。通过对比，该系统测量范围和效率明显优于传统烟气监测系统。实验结果表明：基于FT-IR的烟气连续在线监测系统设计方法，具有测量范围更广、灵敏度高、精确度高、重复性好等特点，具有广泛的应用前景。