Semi-permeable membrane liquid filtration apparatus including elliptical blocking means
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United States of America Patent
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May 19, 1987
Issued Date -
N/A
app pub date -
Nov 9, 1983
filing date -
May 20, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for the ultra or hyperfiltration of liquids to form a permeate fraction and a concentrate fraction includes a stack of membranes and membrane support plates. The stack includes two longitudinally extending main flow passages connected with a plurality of flow passages extending along the surfaces of the membranes. There is provided a device for blocking the flow of liquid from one main flow passage to the other in a zone around the center line between the two main flow passages. Ribs may be provided having a height which increases when viewed in a direction from the central part towards the periphery of a membrane support plate with the object of obtaining an improved distribution of liquid over the membrane surfaces.
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