摘要：根据对离心式空气分级机分级机理与流场研究,找出了影响分级粒径和分级精度的主要因素;总结了一套细粉空气分级机的设计方法;并进一步为国内石油催化裂化催化剂生产厂设计了4套催化剂细粉分级生产装置,成功地将催化剂产品中小于20μm的细粉含量控制在1.5%～3%,使国产的裂化催化剂产品粒度分布达到了国际市场的要求。

关键词：离心式空气分级机；分级机理；设计

Abstract: The operation principle of a rotor-type air classifier was analyzed and main parameters that affected the cut size, cleanness and recovery were chased down. A design measure to this fine particle classifier was then proposed. Four centrifugal air classifiers were designed and employed in FCC catalyst production units in China. The content of fineslessthen 20 !m in the catalyst products is cut down to 1.5%～3 % by use of classifier, which meets the requirements of the international market for particle size distribution of catalyst products. 

Keywords: rotor-type air classifier; mechanism of classification; design