Cemtek - Dilution Extractive CEMS System
Cemtek offers custom-built dilution extractive CEMS manufactured to your application`s unique specifications. Our technicians will work one-on-one with you to design, engineer, construct, deliver, and install your tailor-made product. Dilution extractive systems are very well suited for harsh applications where high levels of gases, acids, moisture, and pollutants are encountered.
An air driven eductor pump extracts a sample of flue gas and transfers it into the CEM system via a dilution extractive sample probe. An air cleanup assembly cleans, scrubs, and dries compressed air to a -70F dew point to create “dilution air.”
The dilution air is mixed with flue gas, which is drawn through a critical orifice, typically at a 100:1 ratio. The diluted sample is then transported through a sample line to a manifold. At that point, individual analyzers may extract a sample to test.
Techniques employed for this vary from gas to gas. For example, chemiluminescence is used to test for NOx, pulsed fluorescence, UV & NDUV for SO2, and NDIR or gas filter correlation technique for CO and CO2.
The signal output from each analyzer is received by a data acquisition and handling system (DAHS), which collects and records the emissions data.