Cemtek is a preferred CEMS integrator for Thermo and Tekran Mercury CEMS. We can solve your Mercury monitoring requirements with a custom engineered CEMS that can include a full CAA Part 75 or a Part 60 CEMS. We can also combine the Mercury CEMS in a shelter with analyzers for compliance or combustion. This can be added to your existing DAS or we can configure a new DAS of your choice into the Mercury CEM System.
This complete Mercury CEMS solution includes the following:
Mercury Analyzer - The mercury analyzer is based upon atomic fluorescence. An advanced cold vapor atomic fluorescence design provides continuous sample measurement, with no additional gases or pre-concentration required and virtually no interference from SO2. Detection limits down to 1.0 ng/m3 allow high sample dilution (100:1) minimizing moisture, heat and interfering pollutants.
Mercury Calibrator - The elemental mercury calibrator was developed using a Peltier cooler/vapor pressure control and mass flow controllers. The mercury concentration output range is currently 0.1 µg/m3 to 300 µg/m3. This range allows the operator to directly calibrate the analyzer at post-dilution concentrations and dynamically spike into the sampling probe.
Zero Air Supply - The mercury analyzer is designed for use with a dilution probe. The zero air supply provides dry, mercury-free dilution air to the probe, zero gas for analyzer calibrations, and air to the mercury calibrator.
Stack Probe and Inertial Filter - The extraction probe uses an inertial filter to separate a particulate-free vapor-phase sample while minimizing the interactions with fly ash, which can cause sampling artifacts. All components that are exposed to sample gas are glass coated to prevent reactions with mercury. The probe incorporates a dilution assembly and calibration gas that can be introduced either upstream or downstream of the inertial filter.
Converter – A high temperature module converts all vapor phase species of mercury to elemental mercury for analysis. The proprietary, high efficiency conversion technology has been demonstrated to meet the U.S. EPA PS-12A criteria of less than 5 percent of span value deviation from the certified gas value.
Probe Control Box - The probe control box is located in the CEM shelter. An umbilical connects the probe to the probe control box and mercury converter. The unit:
- Allows dynamic Hg spiking and auto dilution confirmation
- Automates probe calibration and dynamic spiking via Calibrator Microprocessor
- Measures fast loop flow
- Automates blowback via Calibrator Software
In order to minimize maintenance as much as possible, the Mercury CEMS uses a dry mercury conversion technology which requires no short term consumables, a valuable feature when the converter is mounted hundreds of feet up on the stack. Also, there exists no need to pre-concentrate the sample, which eliminates the need for complicated pre-concentration devices that require even further maintenance.
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| Cemtek has engineered, built, factory tested, shipped and started-up miltiple mercury CMMS. Some of these CMMS are combined with new dilution extractive CEMS and other components.
Cemtek has proven engineering and field service experience with Thermo and Tekran Mercury CMMS.
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| Tekran 3300 CMMS |
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