PRECOAT SEPTUM WITH INTEGRAL PARTICULATE FILTER MEDIUM RETAINING STRUCTURE

An integral particulate filter medium retaining structure is built into precoat septa (10 and 12), particularly spiral wound yarn septa, by providing an open pattern winding (11), preferably of the same yarn, over at least the areas of the septum (10, 12), subjected to high turbulence, to a thicknes...

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Bibliographic Details
Main Author STEVEN D. BARBOZA
Format Patent
LanguageEnglish
Published 21.10.1992
Subjects
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
SEPARATION
TRANSPORTING
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Summary:An integral particulate filter medium retaining structure is built into precoat septa (10 and 12), particularly spiral wound yarn septa, by providing an open pattern winding (11), preferably of the same yarn, over at least the areas of the septum (10, 12), subjected to high turbulence, to a thickness of the precoat particulate filter medium layer to be employed. An air-jet texturized bulked continuous filament yarn of a polypropylene is preferred. The applied precoat fills the interstices within the particulate filter medium retainer winding, at least from the septum surface out to the surface of the open winding serves to prevent the particulate filter medium (not shown) from being scoured or washed away from the surface of the septum. In highly demanding filtration operations, such as boiler feed water for nuclear fueled electric power generating plants, the improved reliability of filtration provided is of very substantial import.
Bibliography:Application Number: AU19920017473