| 摘要 |
PURPOSE:To increase the ignition rate and burning rate of fine powder coal so as to facilitate the burning of high load, by feeding high temperature air as primary air into a burner. CONSTITUTION:Feed adjusting dampers 6, 7, 8 are provided respectively to inlet ends of a high temperature primary air feed pipe 2, an inner low temperature primary air feed pipe 3 and an outer primary air feed pipe 5. Jet outlet ends of the high temperature primary air feed pipe 2, the inner low temperature primary air feed pipe 3 and a fine powder coal feed pipe 4 are respectively provided with swirl vanes 9, 10, 11 that cause feeds to swirl and jet. Accordingly, because of the primary air in a high temperature state and the high temperature secondary air in the furnace the preheated fine powder coal can be quickly ignited, and as the fine powder coal is preheated, the burning rate is augmented, and as a result the burning efficiency is enhanced to facilitate burning at high load. |
