Cooperative research on the combustion characteristics of cofired desulfurized Illinois coal and char with natural gas. (Quarterly) technical report, March 1, 1992--May 31, 1992

摘要

The DTFF was modified to extend the operating range to larger sample collection capabilities and higher temperatures. A plasma gas heater was designed and constructed so that temperatures and heating rates encountered by pulverized coal particles in the flames of large boilers or in the advanced slogging combustors are better simulated. The modified DTFF, referred to as the Ash Characterization Facility, has been set up and initial tests with ash collection and analysis have been performed. The plasma torch has been tested, and steady operation has been established. The Ash Characterization Facility has been used to produce ash samples from IBC 106 coal at several temperatures and residence times. The total sulfur in the ash samples has been determined, showing the contributions of methane coming for operating parameters. A long sampling probe has been constructed, which win enable ash and char samples to be obtained at various residence times. Preparatory work with the gas chromatograph has been initiated to permit the simultaneous analysis of both the gas phase with the solid particle.