实验结果表明：入口颗粒的粒度分布不但对旋风管的分离总效率有影响，而且对粒级效率也有较大影响；
The experimental results indicated that particle sizes had an effect on separation efficiency of cyclone tube, and also made a difference to grade efficiency.
在增加磨煤机再循环风管的同时缩小一次风管径，使进入炉膛的冷风量减少了8.12%(总风量)。
Through installing recirculation tube on the mill and shrinking the primary air pipe diameter, the percentage of cool Sir To combustor is reduced by 8. 12%.
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