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FIELD TESTS OF INDUSTRIAL STOKER COAL-FIRED BOILERS FOR EMISSIONS CONTROL AND EFFICIENCY IMPROVEMENT - SITE C
Citation:
Gabrielson, J., P. Langsjoen, AND T. Kosvic. FIELD TESTS OF INDUSTRIAL STOKER COAL-FIRED BOILERS FOR EMISSIONS CONTROL AND EFFICIENCY IMPROVEMENT - SITE C. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/7-79/130A.
Description:
The report gives results of field measurements made on a 182,5000 lb/hr spreader stoker boiler. The effect of various parameters on boiler emissions and efficiency was studied. Parameters included overfire air, flyash reinjection, excess air, boiler load, and fuel properties. Measurements included gaseous and particulate emissions, particle size distribution of the flyash, and combustible content of the ash. Gaseous emissions measured were O2, CO2, CO, NO, SO2, and SO3 in the flue gas. Sample locations included the boiler, multiclone, and electrostatic precipitator outlets. In addition to test results and observations, the report describes the facility tested, coals fired, test equipment, and procedures. Stopping flyash reinjection reduced particulate loading at the boiler outlet by 75%, and reduced particulate loading at the multiclone outlet by 45%. Increasing the overfire air from 5 to 25 in. H2O resulted in a 9% increase in NO emissions. At design capacity, the boiler emitted between 27.5 and 35.5 lb/million Btu particulate matter and between 340 and 410 ppm NO at the boiler outlet.