Filtration system for preparation of fluids for medical applications

摘要

Systems, methods, and devices for preparation of water for various uses including blood treatment are described. In embodiments, fluid is passed through a first filtration step which is effective for creating purified water and a pair of ultrafilters placed at the outlet. The ultrafilters are separated by an intervening flow path to prevent grow-through from the outlet end upstream. In embodiments, a recirculation path with an air removing filter helps to eliminate air from the ultimate product water.

主权项

1. A water treatment plant, comprising:
a first purifying filter adapted to purify an input water stream and output a purified stream; a first microporous membrane ultrafilter effective to sterilize a water stream connected to receive said purified stream and further filter it; a second microporous membrane ultrafilter effective to sterilize a water stream connected in series after said first microporous membrane ultrafilter; said first and second microporous membrane ultrafilters each being contained in one or respective housings and having separate seals to said one or respective housings that are spaced from each other; said first and second microporous membrane ultrafilters having surfaces that are separated by a predetermined flow path that creates a separation between the first and second microporous membrane ultrafilters, wherein the separate seals are separated by the predetermined flow path, and the first and second membranes are separated by a predetermined path length, wherein the at least one of the first and second microporous membrane ultrafilters has two ports on an upstream side of the membrane thereof, the two ports being connected by a return branch having an inline air removing filter.