The Study On Separation Performance Of Local Feeding In Cyclone Separator

Cyclone separator is a common gas-solid separation equipment,whose main performance evaluation is separation efficiency.Based on the flow state of gas-phase flow field,it is found that different regions of cyclone separator make different contributions to the particle separation.However,the internal separation mechanism of the cyclone separator is still to be studied deeply.Therefore,the separation performance of the cyclone separator in different regions was studied by local feeding to determine the key region for the separation efficiency,and to provide data support for further study of the mechanism of the internal separation process of the cyclone.In this experiment,the weighing method was applied to study the performance of Stairmand cyclone separator with a diameter of 300 mm affected by local feeding,mainly including the physical property of particle,mass flow rate,feeding angle,radial and axial location.Meanwhile,the particle concentration and size distribution in gas exit pipe were measured by aerosol spectrometer,revealing the effects of local feeding on separation efficiency of cyclone separator through online testing technique.The results showed that the overall separation efficiency of separator increases as the particle size increases.Because of the action of the airflow at the gas exit pipe,the overall separation efficiency increases as the radial position increases,and the gas exit pipe makes a key contribution to the escape of the smaller particles.In addition,the overall separation efficiency varies from 8% to 90% increases with the lower axial feeding position,and the cone region is beneficial for the separation of the bigger particles.Based on the trend of the total separation efficiency of the cyclone separator along the axial position,the internal space of the cyclone separator is partitioned,which can simplify the separation efficiency partitioning model.