LU Daoming, FAN Yiping, LU Chunxi

(State Key Laboratory of Heavy Oil, College of Chemical Engineering and Environment,China University of Petroleum Beijing, Beijing 102249, China)

Abstract: This review summarizes the research and development of air classifiers in recent years, including the assessment standards of air classifiers, representative models and their improvements, as well as the research of new models. It is found that gravity classifiers are mainly used for coarse particle separation with greater operating flexibility, simple flow fields and structures, and their classification efficiency can be significantly improved by adding internals or achieving multiple separations. The theory of fluidized bed classifiers has made great progress, nevertheless there are few applications, so the industrial transformation needs to be realized as soon as possible. The efficiency of inertial classifiers and dynamic classifiers are relatively high, and the research on their structure parameters and flow fields has led to ultrafine powder classification. Many new structures have been proposed, but there are few continuous studies. With the improvements of classification fineness, profits, energy conservation and environmental requirements, the development direction of air classifier in the future is to standardize the flow field, to optimize the separation process as well as to couple multi-mechanism classification in one equipment.

Keywords: granular materials; air classification; assessment standard; structure parameter; flow field

文章编号：1008-5548(2020)06-0011-14

DOI:10.13732/j.issn.1008-5548.2020.06.002

收稿日期： 2020-06-18， 修回日期：2020-08-02，在线出版时间：2020-09-09 15:19。

基金项目：国家自然科学基金项目，编号：U1862202。

第一作者简介：卢道铭(1995—)，男(满族)，硕士研究生，研究方向为过程强化与装备。E-mail：13691326238@163.com。

通信作者简介：卢春喜(1963—)，男，博士，教授，博士生导师，研究方向为过程强化与装备。E-mail：lcx725@sina.com。

中图分类号：TQ051.8                              文献标志码：A