Combustion properties of micronized coal for high intensity combustion applications

摘要: Results are presented of an investigation combustion related properties micronized coal feeds (all particles less than 40 microns), mixing characteristics centrifugally driven burner devices, and aerodynamic to centrifugal for high intensity applications. Combustion investigated the evolution fuel bound nitrogen associated mineral matter during initial stages combustion. Parent beneficiated samples, as well narrow size cut samples from a wide range ranks, were using multireactor approach. The approach allowed experimental separation different aspects process, enabling comprehensive understanding FBN be formulated empirical rate constants developed. A specially designed on-line gas analysis system balance achieved. combined ash tracer technique quantitative determination tar yields rapid devolatilization. Empirical kinetic rates developed with at low temperatures appearance HCN char species temperatures. phase system, coupled separate aerosol segregation trains, possible formation ofmore » by devolatilization monitored. Compensated thermocouple, hot wire anemometry, digital imaging techniques employed characterize combustor. Analytical investigations fidelity stream trajectories in strong fields performed. Both spherical nonspherical particle morphologies considered analytically. 14 refs., 141 figs., 34 tabs.« less