固定污染源烟气监测中含湿量测试方法优化研究

Research on Optimization of Moisture Content Test Method in Flue Gas from Stationary Source

根据烟气二噁英采样须收集冷凝水的特点,利用理想气体状态方程计算烟气含湿量,得到简化公式,将该简化公式法与阻容法、FTIR法用于测定4类不同行业企业烟气的含湿量,并对测定结果做比对。结果表明,4类不同行业企业简化公式法的测量结果RSD为1.0%~4.2%,相对偏差为-4.21%~-0.25%;在湿度较高的测量条件下,简化公式法的测量结果RSD与相对偏差均<5%。该方法可作为固定污染源烟气手工监测中含湿量测量的一种辅助方法和质控措施。

According to the characteristics of collecting condensate water for dioxins sampling in flue gas,the ideal gas state equation was used to calculate the moisture content of flue gas,and the simplified formula was obtained.Compared the simplified formula method with resistance capacity method and FTIR method in determining the moisture content of flue gas in four different industries,the results showed that the RSDs of the measurements by the simplified formula method ranged from 1.0% to 4.2%,and the relative deviation was -4.21%~-0.25%.Under the condition of high humidity,the RSDs and the relative deviation of the simplified formula method were all less than 5%.This method could be used as an auxiliary method and quality control measures for moisture content determination in manual monitoring of flue gas from pollution source.