| 摘要 |
<p>The invention relates to a pulverizer with a free air purging mechanical seal (12) and classifier (10) design that provides free air purging of the seal gap (61) between the mechanical seal assembly (12) and the classifier (10). The invention also provides a coarse particle extraction assembly (8) wherein the coarse particles rejected by the classifier (10) can be reliably discharged from the pulverizer or recirculated to the inlet. Furthermore, the rejected coarse particles can be subjected to jet milling and then recirculated. The invention also provides a free air cooling arrangement for cooling both the lower bearing member (28) and the area of the vertical drive shaft (24) where it meets the lower bearing member (28). The invention also provides an improved feed nozzle (84) for use of the pulverizer in drying applications.</p> |
