Overview Of EM-5 Continuous Emission Monitoring System (dilution method)
EM-5 has four basic parts: the dust monitoring subsystem, gaseous pollutants monitoring subsystem, flue gas parameter monitoring subsystem, system control, and data acquisition and a processing subsystem. It can monitor parameters such as SO2, NOx, O2, dust, temperature, pressure, and flow rate. Measured gas the passes filter in sampling probe for dust removal; is diluted by the probe as fixed ratio and then enters the analyzer via sampling pipeline. By adopting the ultraviolet fluorescence method (SO2) and chemiluminescent method (NOx), this CEMS analyzer
can precisely measure gaseous pollutants at ppb level. The diluted gas for flue sample gas should be high dehumidification and dedusting. After flue sample gas being diluted as a fixed ratio, the dew point of the sample gas is around -30℃. Thus, no heat tracing is needed for the whole sampling pipeline. It effectively solves the technical problem that the measurement result of SO2 is on the low side for the condensation method. Also, it avoids the high operation cost and hidden danger of the heat tracing of the hot wet method.