摘要
现有非分散红外CEMS在使用过程中,由于烟气中的水分和CH_(4)等因素的交叉干扰,会造成SO_(2)和NO的监测结果出现偏差,难以满足超低排放的监测要求。分析了非分散红外CEMS工作时出现冷凝水的原因,以及烟气中水分和CH4对SO2红外吸收波段干扰特点,提出了解决样气管中冷凝水和降低烟气中含水率的方法,并给出了消除CH4对SO2测量数据干扰的方法和CEMS的优化方案,实际应用表明:改进后的CEMS对水汽及烟气中其他组分具有极强的抗干扰性,为超低排放气态污染物监测提供了准确的监测方法。
During the application of existing non-dispersed infrared CEMS,SO2 and NO test results will show some deviation due to the cross interference of water,CH4 and other factors in the flue gas,it is difficult to satisfy the requirement of ultra-low emission.The cause for the occurrence of condensate during non-dispersive infrared CEMS operation and the interference characteristics of the water and CH4 in flue gas to infrared absorption wave band are investigated.Methods to solve the condensate of the sample gas pipe and to reduce the moisture content in the flue gas are proposed,and a method to eliminate the interference of CH4 on the SOz measurement data and the optimization scheme for CEMS is proposed.The actual application results show that the improved CEMS has strong anti-interference properties against water vapor and other components in the flue gas,and an accurate monitoring method for the monitoring of ultra-low emission of gaseous pollutants is provided.
作者
李政
Li Zheng(Beijing Zhongyan Construction Engineering Co.Ltd.,Beijing,102400,China)
出处
《石油化工自动化》
CAS
2024年第2期93-96,101,共5页
Automation in Petro-chemical Industry
关键词
超低排放
非分散红外法
烟气排放连续监测系统
气态污染物监测
ultra-low emissions
non-dispersed infrared method
continuous emission monitoring system
gaseous pollutant monitoring
