| 摘要 |
PURPOSE:To provide a fine powdered coal burner being possible to stably burn a large quantity of the fine powdered coals without worsening furnace condition and shortening service life of a tuyere by arranging an observation pipe for inner part of a furnace at center part and fine powdered coal pipe, temp. adjusting gas pipe at tuyere tip and oxygen pipe concentrically in order at outer side thereof. CONSTITUTION:The observation pipe 1 for inner part of the furnace is arranged at the center part and air for cleaning is intermittently introduced into the inside of the pipe 1 from an air inlet 2 and also the pipe 1 is communicated with a peephole 4 through a gate valve 3 to obtain information in the furnace from there. At the outside of the pipe 1, the fine powdered pipe 5, the temp. adjusting gas pipe 7 at the tuyere tip for supplying gas of steam, etc., the oxygen pipe 9 and the cooling water pipe 11 are concentrically arranged in order. If necessary, further a sliding pipe is arranged at the most outer side. By such constitution, even if the operation with pure oxygen or oxygen having high concn. is executed, the burner being possible to burn a large quantity of the fine powdered coal under safety and scarcely effect to the small tuyere without damaging the furnace condition is obtd. |
