Importance

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Abstract

A repeatably rejuvenating filtration system of the pneumatic hydro-pulse type is disclosed as including the feeding of a solid/fluid feed slurry to be filtered into operative engagement with the interior porous wall surfaces of a plurality of open ended tubular filter elements so that filtrate passes outwardly through the walls of the filter elements and the solids are collected as a cake on the interior wall surface. The cake of solids on the interior wall surface is subjected to an axial discharge fluid flow through the interior of the filter elements along the length of the cake for removal of the cake axially along the interior of the filter elements. The system includes an arrangement for providing a pressure actuated pulse of fluid that may operate through the cylindrical walls toward the axial bore of the filter tubes to dislodge the filtered material, and may operate substantially simultaneously with the axial discharge flow for conducting the dislodged filtered material from the open ended bores. The versatility of the system enables the use of a recirculating arrangement that is effective to concentrate the solids content and control the thickness of the cake deposit.

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First Claim