摘要
在冷态模型实验台上研究料层情况对炉内气流分布的影响规律 ,得出 :1)料层高度增加 ,上行冷却风趋势减小 ,下行焙烧风趋势增大 ;2 )料层倾角由 0°增加到 3 4°时 ,上行冷却风趋势增大 ,下行焙烧风趋势减小 ,气流均匀性得以改善 ;实验条件下 ,较佳的料层倾角为 2 9°～ 3 4° ,现有球团竖炉的料层倾角基本适合 ;3 )料层高度增加 ,风机出口流量减小 ,出口压力增加 ,在一定范围内料层高度与竖炉进风量接近线性关系 ;降低炉内粉尘量是提高进风量、降低风机出口压力的关键。生产实际中调整料层高度时 ,一定要兼顾其对炉内气流运动的影响 ,并有效地利用之 ;在生产可调范围内改变料层高度 ,进风量改变较小 ,一般通过风机自身能力的调节来保证进风量。
The cold experiment was carried out to research the fluid flow distribution influenced by the layer situation of the packed beds in pellet furnace, and then conclusions were drawn:1)if the layer height is increased, the trend that cooling gas flows upward is decreased, while the trend that roasted gases flow downward is increased;2)if the layer obliquity is increased from 0° to 34°, the trend that cooling gas flows upward is increased, while the trend that roasted gases flow downward is decreased, moreover, the uniformity of fluid flow is improved; the suitable layer obliquity is 29°～34° on the experimental conditions,and then the existing layer obliquity of pellet furnace is suitable by and large;3)if the layer height is increased,the outlet flow of fan is decreased, while the outlet pressure is increased, besides, the layer height is linear with the gases influx in a certain range; in order to increased the influx and decrease the outlet pressure it is essential to reduce dust in pellet furnace In production, if the layer height is increased, the influences by which should be considered; if the layer height is changed, the influx is changed on the small side, which can be adjusted by the fan itself to keep the influx of pellet furnace
出处
《烧结球团》
北大核心
2004年第2期1-5,共5页
Sintering and Pelletizing
基金
国家自然科学基金资助项目 (基金号 :5 0 3 3 40 2 0 )
