Title :
Coal combustion and ash collections in high temperature flow
Author :
Goldman, Y. ; Hazanov, Z. ; Timnat, Y.M.
Author_Institution :
Technion, Haifa, Israel
Abstract :
An experimental and theoretical study of mechanisms governing coal particle combustion and ash separation is presented. A high-temperature countercurrent combustor and an inertial separator were studied for a range of conditions in which sticking ash appeared. The performance of a rotational-flow combustor and a multicyclone-type ash separator were strongly influenced by gas scavenging. Changes in the construction of the systems improved efficiency and reliability. A theoretical model for the gas phase using the two-equation turbulence approach was solved for a domain corresponding to sophisticated configurations. The effects of heterogeneous combustion and of particle drag are superimposed on the aerodynamics
Keywords :
air pollution detection and control; coal; combustion; thermal power stations; aerodynamics; ash collections; coal particle combustion; efficiency; gas scavenging; heterogeneous combustion; high-temperature countercurrent combustor; inertial separator; multicyclone-type ash separator; particle drag; reliability; rotational-flow combustor; sticking ash; two-equation turbulence; Aerodynamics; Ash; Ceramics; Combustion; Cooling; Cyclones; Filters; Fluid flow; Insulation; Temperature;
Conference_Titel :
Energy Conversion Engineering Conference, 1989. IECEC-89., Proceedings of the 24th Intersociety
Conference_Location :
Washington, DC
DOI :
10.1109/IECEC.1989.74828
