光学原位法探针测量超低减排烟气

In-situ optical probe measurement of ultra-low emission reduction flue gas

随着燃煤电厂超低减排的开展,烟气监测技术的要求也越来越严格。研制了应用差分光学吸收光谱(DOAS)和多波长消光的实时在线烟气监测探针,可同时对SO_2、烟尘等浓度进行监测。并在实验室进行了标定,SO_2浓度及烟尘反演误差均小于10%,不同浓度SO_2反演浓度曲线线性度好,线性相关系数为0.999 64。利用该系统对某燃煤电厂烟气中的SO_2和液滴颗粒物进行了现场监测。结果表明:该系统对SO_2、液滴颗粒的监测结果与锅炉运行工况、实际运行状况吻合。

With the development of ultra-low emission reduction in coal-fired power plant,the requirement of monitoring technologies is becoming more and more rigid.A detector probe based on differential optics absorption spectroscopy（DOAS） and multi-wavelength extinction method is presented,which can be used to realize the in-situ measurement of SO_2,particulate in flue gas,etc.The system was calibrated with the standard SO_2 gas and polystyrene particulate,and both inversion concentrations agree well with real values.The error is less than 10%,the fitting line of seven SO_2 measurement points has good linearity,and linear correlation coefficient is 0.999 64.The system was successfully applied to a coal-fired power plant in different operating conditions for a longer time continuous monitoring.Results show that the system has a good agreement between system monitoring and working conditions on SO_2 and particulate in flue gas.