Continuous filtering process

A continuous process for removing particulate and dissolved

impurities from a liquid comprising the steps of injecting a

particulate filter medium into a liquid stream to form a slurry,

conveying the slurry into the bottom portion of a separation

vessel, accumulating the particulate filter material in the form of

a porous plug, moving said plug into the upper portion of said

separation vessel, pumping the liquid through the lower portions of

said plug, removing the liquid from the upper portion of the

separation vessel, removing the particulate filter material from

the upper end of the separation vessel above the point at which the

liquid is discharged and subjecting the removed filter material to

a cleansing or regeneration treatment for reuse in the process.

Orcutt, J. C., & Mixon, F. (1972). IPC No. U.S.Continuous filtering process (Patent No. 3671426.)