中文摘要：

研制了应用差分光谱吸收法（DOAS）监测SO2的固定污染源连续排放监测系统（CEMS）．介绍了DOAS的基本原理以及CEMS的结构和工作流程．利用该监测系统对某供热锅炉烟气中的SO2进行了现场监测．结果表明：该系统对SO2的监测结果与锅炉运行工况、实际运行状况是一致的．

英文摘要：

A continuous emission monitoring system （CEMS） was developed to monitor SO2 by means of differential optical absorption spectroscopy （DOAS）. Principle of DOAS and structure and workflow of CEMS were introduced. The developed system was used to monitor SO2 of flue gas in a heating boiler. Results show a good agreement between system SO2 monitoring and boiler operation condition.