The Analysis of Influencing Factors for Combustion Stability on 300MW Tangentially Pulverized Coal Fired Boiler

Through the research of the pulverized coal ignition and steadily combustion mechanism and the numerical Simulation of the 300MW tangentially pulverized coal fired boiler by coalfire software, combining the operating data of the boiler, we establish the corresponding relation between the result of numerical simulation and combustion stability. The result indicates that the higher volatile, lower content of ash and moisture of the coal will help the coal pulverized air current ignite. Better fineness coal pulverized is favorable for ignition. When boiler load reduces, it will influence the characteristic "self-lit" effect of the tangentially pulverized coal fired boiler, which will cause combustion unstably.