Radiative Properties of Coal and Biomass Deposits and Slags

摘要

Experimental data describing spectral and total emittances of ash deposits and slags from coal, biomass, and coal-biomass blends exhibit trends in temperature and wavenumber or wavelength consistent with theory and observed boiler performance. Bituminous coal deposits exhibit higher emittances over nearly the entire spectral range than do subbituminous coals or deposits. All deposits exhibit total emittances that decrease with increasing temperature, mainly because of shifts in the radiation intensity with temperature. Slags exhibit less temperature variation than deposits. These radiative transport properties relate directly to boiler performance, operation, and design.