PRESSURE DROP OF GRANULAR BED UNDER THE FILTRATION CONDITION
颗粒层除尘器过滤状态压力损失的研究

A mathematical model for the pressure drop of granular bed filter under the dust filtration condition was developed on the basis of the pressure gradient equation proposed by Mehter et al . The model shows that the pressure drop in the process of dust filtration relates to the initial pressure drop and the dust depositing rate. From the experiment of the filtration of talc powder in the bed of quartz granules, the dust depositing rate was determined. The equation for the pressure drop of granular bed given in this paper can be employed to choose the filtration velocity and to estimate the dust loading for deciding the cleaning methods of granular bed.