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A FIELD TEST USING COAL:DRDF BLENDS IN SPREADER STOKER-FIRED BOILERS
Citation:
Degler, G., H. Rigo, B. Riley, AND Jr. A FIELD TEST USING COAL:DRDF BLENDS IN SPREADER STOKER-FIRED BOILERS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-80/095 (NTIS PB81111106), 1980.
Description:
This program was conducted to characterize and demonstrate the technical, economic, and environmental feasibility of combustion densified forms of refuse derived fuel (dRDF) blended with coal in spreader stoker-fired boilers. A total of 258.5 Mg (285 tons) of pelletized 1/2-inch-diameter x 3/4-inch-long dRDF was co-fired with coal in 2.7 x 7.5 kg/sec (60,000 lb/hr) and 3.6 x 10 kg/sec (75,000 lb/hr) of 1.03 MPa (150 psig) saturated steam. The results indicate that coal:dRDF blends up to 1:2 can be handled and burned in conventional spreader stoker-fired boilers without major equipment modification. As more dRDF was substituted for coal, the flame volume increased, the opacity decreased, the fly ash carbon burnout improved, and the turndown ratio of boiler operation increased. The emissions from the blend firing decreased slightly in mass flux, dropped significantly in particulate size and stack opacity, and had satisfactory particulate resistivities.