| 摘要 |
PCT No. PCT/SE95/01002 Sec. 371 Date May 15, 1997 Sec. 102(e) Date May 15, 1997 PCT Filed Sep. 7, 1995 PCT Pub. No. WO96/08300 PCT Pub. Date Mar. 21, 1996A filtering apparatus comprises: a pressure vessel; a plurality of filter elements arranged within the pressure vessel, the filter elements each having an upper end, a lower end and a side wall; filling bodies positioned within the filter elements; a first conduit for introducing compressed gas into the pressure vessel; a second conduit for transporting unfiltered liquid to and from the pressure vessel; and a third conduit for removing filtrate from the pressure vessel and transporting back-flushing liquid to and from the filter elements, the third conduit positioned proximate to a bottom portion of the pressure vessel and attached to the lower ends of the filter elements, such that the third conduit provides a support structure for the filter elements and the back-flushing liquid introduced via the third conduit fills the filter elements in a direction from the lower ends toward the upper ends, the volume of back-flushing liquid introduced into the filter elements limited by the filling bodies. A method of operating the filtering apparatus is also disclosed. |
