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    • 8. 发明授权
    • Filter with preferential fluid affinity
    • 过滤器具有优先的流体亲和力
    • US06422395B1
    • 2002-07-23
    • US09480748
    • 2000-01-10
    • Barry M. VerdeganBrian W. SchwandtDaniel R. CadyGene A. MullinsW. Lee Currier
    • Barry M. VerdeganBrian W. SchwandtDaniel R. CadyGene A. MullinsW. Lee Currier
    • B01D3916
    • B01D39/1623B01D29/21B01D29/66B01D35/153B01D35/16B01D35/306Y10S210/17
    • A filter is composed of filter media having the following characteristics in combination: a) the filter media has a greater affinity for the filtered fluid than for contaminants in the fluid, and wherein the work of adhesion between the filter media and the contaminants is less than the work of adhesion between the filter media and fluid, and wherein the filter media is preferentially wetted by the fluid relative to the contaminants; b) the filter media is composed of fibers having a defined surface area ratio facilitating fewer attachment sites for contaminants, and, in the case of cleanable reusable filters, facilitating cleansing backwash of the cleanable reusable filter by cleansing fluid along a reverse flow backflush path; c) the filter media has a thickness of 0.025 to 0.075 inch, 0.7 to 2.0 millimeters; d) the face area of the filter media is maximized by pleating the filter media and forming the pleated filter media into an annulus having an inner circumference and an outer circumference and having at least five pleats per inch along the inner circumference; e) the filter media is optionally provided with both upstream and downstream support layers preventing collapse of the thin surface filter media during both filtration and backwash, the support layers being pleated annular screens sandwiching the pleated filter media therebetween, the inner portions of the pleats of the downstream support layer screen adjacent the inner circumference preventing blinding.
    • 过滤器由具有以下特性组合的过滤介质组成:a)过滤介质对过滤流体的亲和力大于流体中的污染物,并且其中过滤介质和污染物之间的粘附作用小于 过滤介质和流体之间的粘合作用,并且其中过滤介质相对于污染物优先被流体润湿; b)过滤介质由具有限定的表面积比的纤维组成,促进污染物的附着位置较少,并且在可清洁的可重复使用的过滤器的情况下,通过沿逆流反冲路径清洗流体来促进清洁可再利用过滤器的反冲洗; c)过滤介质的厚度为0.025至0.075英寸,0.7至2.0毫米; d)过滤介质的面部区域通过打褶过滤介质而最大化,并将褶皱过滤介质形成为具有内圆周和外圆周的环形区域,并且沿着内圆周具有至少五个褶皱/英寸; e)过滤介质任选地设置有上游和下游支撑层,防止在过滤和反冲洗期间薄表面过滤介质的破裂,支撑层是将褶皱过滤介质夹在其间的打褶环形筛,褶皱的内部 下游支撑层屏幕邻近内周防止盲法。