In normal particulate filtration, liquid is forced underpressure through a porous medium. In ultrafiltration, similarly, liquid is forced under pressure through a porous medium.
一般的过滤是在压力作用下强行是液体通过多孔介质，同样，在超滤中，也实在压力下强行通过多孔介质。
2
Under non-stationary filtration condition, firstly the study about the effect of particle concentration, filtration velocity and filtration time on pressure drop was taken.
含尘滤料过滤阶段，测试了入口粉尘浓度、过滤速度等对过滤压力损失的影响。
3
During the filtration process once the vessel is filled and underpressure filtrate passes through the cloth and into the outer tubes through the slots.