Relative Accuracy Test Evaluation for Flue Gas Continuous Emission Monitoring Systems

Measurement data by continuous emission monitoring systems(CEMS) is a legal base for charging the pollutant emission.But the great masses of CEMS have some problems of high data drift and low measurement accuracy,etc.For evaluating CEMS relative accuracy,simultaneously compared SO_2/NO_x and dust monitoring systems with CEMS and normal handmade sampling method at different boiler load.It draws a conclusion that the relative accuracy test audit(RATA) of SO_2/NO_x monitoring systems goes beyond criterion,the data should be corrected for the continuous opacity monitoring systems exact.The CEMS should carry out RATA and bias test to ensure measurement data validation and accuracy.