公开(公告)号：US20100320159A1

公开(公告)日：2010-12-23

申请号：US12526464

申请日：2007-02-09

Applicant: Douglas W. Lee ,  Colin Tyrie ,  William Bateman

Inventor： Douglas W. Lee ,  Colin Tyrie ,  William Bateman

IPC: B01D24/46

CPC classification number: B01D24/14 ,  B01D24/4631 ,  B01D2201/087

Abstract: A method and apparatuses are presented for rejuvenating a bed of granular filter medium that has accumulated contaminants during filtration of a liquid stream. The method first includes the step of establishing a small volumetric flow rate of clean filtrate in reverse flow. Then, the filter media is agitated to break-up contaminants that have become agglomerated on the surface of or within the interstitial spaces of the filter media. The agitating step is accomplished by exposing the liquid-full filter media to a jetting stream comprised mostly of a gas mixed with a clean liquid. The jetting stream is dispersed throughout the filter media through a plurality of radial nozzles located within the filter bed. The radial nozzles disperse the gas within the liquid and filter media causing sufficient turbulence and agitation of the filter media granules to liberate the trapped contaminants without the need for high liquid flow rates. The number of nozzles and their placement within the filter bed are varied depending on factors such as size and shape of the filter vessel and the type of filter media being cleaned. The amount of water and gas flowing through the nozzles is also adjusted to provide substantially uniform cleaning of the entire bed. This method results in lower volumes of clean filtrate being consumed in the backwash cycle and the associated storage and recycle of that liquid back into the process. The radial nozzles are each comprised of two horizontal and parallel circular disks spaced apart to create a cylindrical void through which the pressurized gas and liquid jetting stream flows. The apparatuses presented are a singular filter vessel an a plurality of filter chambers within a common filter vessel each containing granular filter media and a plurality of radial nozzles disposed with the media for dispersing the jetting stream throughout during the cleaning and rejuvenation steps of a filtering process.

Abstract translation: 提出了一种方法和装置，用于在液体流过滤期间使已经积聚污染物的颗粒过滤介质床复原。 该方法首先包括在反向流中建立清洁滤液的小体积流量的步骤。 然后，搅拌过滤介质以分散在过滤介质的间隙空间的表面上或其内的聚集的污染物。 搅拌步骤通过将液体完全过滤介质暴露于主要由与清洁液体混合的气体的喷射流来完成。 喷射流通过位于过滤床内的多个径向喷嘴分散在整个过滤介质中。 径向喷嘴将气体分散在液体和过滤介质中，导致过滤介质颗粒充分的湍流和搅动，以释放捕获的污染物，而不需要高液体流速。 喷嘴数量及其在过滤床内的布置根据诸如过滤容器的尺寸和形状以及要清洁的过滤介质的类型等因素而变化。 流经喷嘴的水和气体的量也被调节以提供对整个床的基本均匀的清洁。 这种方法导致在反冲洗循环中消耗的清洁滤液的体积较小，并且该液体相关的储存和再循环回到该过程中。 径向喷嘴各自包括两个水平和平行的圆形间隔开的圆形孔，以产生加压气体和液体喷射流通过该圆柱形空隙。 所提出的装置是单个过滤器容器，在共同的过滤容器内的多个过滤室，每个过滤器容器均包含颗粒过滤介质和多个径向喷嘴，该喷嘴设置有用于在过滤过程的清洁和再生步骤期间分散喷射流的介质 。

公开(公告)号：US09174149B2

公开(公告)日：2015-11-03

申请号：US12526464

申请日：2007-02-09

Applicant: Douglas W. Lee ,  Colin Tyrie ,  William Bateman

Inventor： Douglas W. Lee ,  Colin Tyrie ,  William Bateman

IPC: B01D24/46 ,  B01D24/38 ,  B01D24/14

CPC classification number: B01D24/14 ,  B01D24/4631 ,  B01D2201/087

Abstract: A method and apparatuses are presented for rejuvenating a bed of granular filter medium that has accumulated contaminants during filtration of a liquid stream. The method first includes the step of establishing a small volumetric flow rate of clean filtrate in reverse flow. Then, the filter media is agitated to break-up contaminants that have become agglomerated on the surface of or within the interstitial spaces of the filter media. The agitating step is accomplished by exposing the liquid-full filter media to a jetting stream comprised mostly of a gas mixed with a clean liquid. The jetting stream is dispersed throughout the filter media through a plurality of radial nozzles located within the filter bed. The radial nozzles disperse the gas within the liquid and filter media causing sufficient turbulence and agitation of the filter media granules to liberate the trapped contaminants without the need for high liquid flow rates. The number of nozzles and their placement within the filter bed are varied depending on factors such as size and shape of the filter vessel and the type of filter media being cleaned. The amount of water and gas flowing through the nozzles is also adjusted to provide substantially uniform cleaning of the entire bed. This method results in lower volumes of clean filtrate being consumed in the backwash cycle and the associated storage and recycle of that liquid back into the process. The radial nozzles are each comprised of two horizontal and parallel circular disks spaced apart to create a cylindrical void through which the pressurized gas and liquid jetting stream flows. The apparatuses presented are a singular filter vessel an a plurality of filter chambers within a common filter vessel each containing granular filter media and a plurality of radial nozzles disposed with the media for dispersing the jetting stream throughout during the cleaning and rejuvenation steps of a filtering process.

Abstract translation: 提出了一种方法和装置，用于在液体流过滤期间使已经积聚污染物的颗粒过滤介质床复原。 该方法首先包括在反向流中建立清洁滤液的小体积流量的步骤。 然后，搅拌过滤介质以分散在过滤介质的间隙空间的表面上或其内的聚集的污染物。 搅拌步骤通过将液体完全过滤介质暴露于主要由与清洁液体混合的气体的喷射流来完成。 喷射流通过位于过滤床内的多个径向喷嘴分散在整个过滤介质中。 径向喷嘴将气体分散在液体和过滤介质中，导致过滤介质颗粒充分的湍流和搅动，以释放捕获的污染物，而不需要高液体流速。 喷嘴数量及其在过滤床内的布置根据诸如过滤容器的尺寸和形状以及要清洁的过滤介质的类型等因素而变化。 流经喷嘴的水和气体的量也被调节以提供对整个床的基本均匀的清洁。 这种方法导致在反冲洗循环中消耗的清洁滤液的体积较小，并且该液体相关的储存和再循环回到该过程中。 径向喷嘴各自包括两个水平和平行的圆形间隔开的圆形孔，以产生加压气体和液体喷射流通过该圆柱形空隙。 所提出的装置是单个过滤器容器，在共同的过滤容器内的多个过滤室，每个过滤器容器均包含颗粒过滤介质和多个径向喷嘴，该喷嘴设置有用于在过滤过程的清洁和再生步骤期间分散喷射流的介质 。