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COMPACT, IN-STACK, THREE SIZE CUT PARTICLE CLASSIFIER
Citation:
Lacey, G., K. Cushing, AND W. Smith. COMPACT, IN-STACK, THREE SIZE CUT PARTICLE CLASSIFIER. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/7-77/033.
Description:
A compact, in-stack, three size cut particle classifier was designed, fabricated and tested. The classifer consists of a two-stage impactor and back-up filter designed to measure the particulate emissions from sources in three size ranges: greater than 3 micrometer, approximately 1-3 micrometer, greater than 1 micrometer. Three sets of jet plates (two jet plates per set) are included. Each set is designed for a different flow rate; however, all particle size cutpoints produce data in the three size ranges of interest. A choice of flow rates is desirable to allow reasonable sampling times at particulate emission sources with both high and low mass loadings. The classifier was calibrated in the laboratory with monodisperse aerosols from a vibrating orifice aerosol generator. In field tests at three power plants, particle size distribution by the classifier were compared to particle size distributions by Andersen and Brink samplers. With this compact sampling system, measurements of the three size fractions are possible over a wide range of test conditions.