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ENVIRONMENTAL ASSESSMENT OF A WATERTUBE BOILER FIRING A COAL-WATER SLURRY. VOLUME 1. TECHNICAL RESULTS
Citation:
DeRosier, R. AND L. Waterland. ENVIRONMENTAL ASSESSMENT OF A WATERTUBE BOILER FIRING A COAL-WATER SLURRY. VOLUME 1. TECHNICAL RESULTS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/7-86/004A.
Description:
The report describes results from field testing a watertube industrial boiler firing a coal/water slurry (CWS) containing about 60% coal. Emission measurements included continuous monitoring of flue gas emissions; source assessment sampling system (SASS) sampling of the flue gas, with subsequent analysis of samples to obtain total flue gas organics in two boiling point ranges, compound category information within these ranges, specific quantitation of the semivolatile organic priority pollutants, and flue gas concentrations of 73 trace elements: EPA Methods 5/8 sampling for particulate, SO2, and SO3 emissions; and grab sampling of fuel and ash for inorganic composition. NOx, SO2, CO, and TUHC emissions were in the 230-310, 880-960, 170-200, and 1-3 ppm ranges (corrected to 3% 02), respectively, over the two tests performed. Particulate levels at the boiler outlet (upstream of the unit's baghouse) were 7.3 g/dscm in the comprehensive test. Coarse particulate (>3 micrometers) predominated. Total organic emissions were almost 50 mg/dscm, with about 70% of the organic matter in the nonvolatile (>300 C) boiling point range. The bottom ash organic content was 8 mg/g, 80% of which was in the nonvolatile range. Of the PAHs, only naphthalene was detected in the flue gas particulate, with emission levels of 8.6 micrograms/dscm. Several PAHs were found in the bottom ash.