High efficiency ion exchanges system for removing contaminants from water

  • US 7,041,223 B2
  • Filed: 03/21/2005
  • Issued: 05/09/2006
  • Est. Priority Date: 10/25/2000
  • Status: Expired due to Term
First Claim
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1. A process for continuously removing perchlorate ion contaminant from perchlorate ion-contaminated water comprising:

  • with a controller, feeding said contaminated water through a first manifold to individually-valved first headers each directly adjacent to a first opening into each of a first subset of a plurality of immobile vessels, each containing between said first opening and a second opening an ion exchange resin bed capable of binding perchlorate contaminant from the contaminated water and yielding reduced perchlorate level water and a perchlorate-contaminated resin bed,with a controller, removing reduced perchlorate level water through the second opening from each of the vessels in the first subset, and passing said reduced perchlorate level water through a second individually-valved header directly adjacent to the second opening and through a second manifold to a reduced perchlorate level water discharge;

    with a controller, feeding regenerant solution to an individually-valved header directly adjacent to a first or second opening on one or more additional vessels making up a second subset of the plurality each such vessel containing a perchlorate-contaminated resin bed,with a controller, passing the regenerant solution over the perchlorate-contaminated resin bed so that the regenerant displaces the perchlorate contaminants off of the perchlorate-contaminated resin bed to yield a regenerated resin bed and spent regenerant solution which is removed from the other opening on the vessel and through another individually-valved header directly adjacent to this opening,with a controller, feeding rinse water to an individually-valved header directly adjacent to a first or second opening on one or more additional vessels making up a third subset of the plurality each such vessel containing a regenerated resin bed, andwith a controller, passing the rinse water over the regenerated resin bed to yield a rinsed, regenerated resin bed and used rinse water which is removed from the other opening on the vessel and through the individually-valved header directly adjacent to this opening.

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