CARTRIDGE FILTER COMBINING A DEPTH FILTER AND A SUB-MICRON FILTER, AND RO PRE-TREATMENT METHOD
摘要
<p>A cartridge filter assembly includes a depth filter element and a downstream second filter element. The depth filter element has a mass of melt-blown polymer filaments. The depth filter removes 0.5 to 10 micron sized contaminants at an efficiency of 90% or more. The depth filter preferably comprises multiple zones occupying different depths, with one or more melt-blown polymer filaments traversing two or more of the zones. The second filter element comprises nano-fibers having a diameter of 1 micron or less, and removes a material percentage of contaminants that are less than 1 micron in size, preferably less than 0.5 microns in size. The depth filter element may be in the form of a tube and the second filter element may be in the form of a pleated sheet located inside of the depth filter. The cartridge filter assembly may be used to pre-treat a feed water upstream of an RO membrane. The SDI of the feed water may be reduced to 3 or less or 2 or less.</p>
申请公布号
WO2012034028(A2)
申请公布日期
2012.03.15
申请号
WO2011US51012
申请日期
2011.09.09
申请人
GENERAL ELECTRIC COMPANY;STIFTER, TRAVIS GERALD;SZCZEPANSKI, JOSEPH T.;LAIDLAW, WILLIAM B.;BHARWADA, UPEN JAYANT;AUNE, THOMAS MARTIN
发明人
STIFTER, TRAVIS GERALD;SZCZEPANSKI, JOSEPH T.;LAIDLAW, WILLIAM B.;BHARWADA, UPEN JAYANT;AUNE, THOMAS MARTIN