催化裂化脱硫烟气连续监测系统存在的问题与建议

Problems and Suggestions for the Continuous Monitoring System of Desulfurized Flue Gas from FCC Unit

文章介绍了烟气排放连续监测系统(CEMS)的主要测量技术,分析了不同测量技术的优、缺点及适用范围。结合催化裂化脱硫烟气排放污染物的特点,对目前广泛使用的冷干直抽法烟气CEMS在应用中存在的水汽、NH 3干扰SO 2测定结果的问题进行了说明,并通过分析技术对比、烟气预处理技术对比,提出了选用稀释采样法或加装烟气预处理系统的建议。

This article mainly introduced the major measurement techniques for continuous emission monitoring system(CEMS).The advantages/disadvantages,and the scope for the application of different mea-surement techniques were discussed.Combined with the characteristics of pollutants from flue gas of FCC desulfurization,the disturbance mechanism of water vapor and ammonia on the measured SO 2 results in the CEMS based on the widely applied cold-dry direct pumping method.Based on the comparison of analytic technology and flue gas pre-treatment technology,countermeasures including dilution extraction,installation of pre-treatment system were raised to enhance the accuracy of the CEMS.