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Coal-Fired Utility Boiler Water Droplet Emission Quantification and Opacity Monitor Interference |
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Air Control Techniques, P.C. developed a technique to measure the
concentrations of entrained condensed water droplets (sometimes termed
uncombined water) in the effluent gas stream of a large coal-fired
boiler with a flue gas desulfurization system. Air Control Techniques,
P.C. was able to accurately measure the mass concentrations of the
droplets in the size range that affected the accuracy of the stack
mounted opacity monitor. Based in part on these tests, Air Control
Techniques, P.C. demonstrated that many of the reported opacity
excursions were due to condensed water related biases and not due to
particulate matter emissions.
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