Method and apparatus for treating lime slurry for grit removal

  • US 8,163,175 B2
  • Filed: 04/08/2008
  • Issued: 04/24/2012
  • Est. Priority Date: 04/14/2005
  • Status: Active Grant
First Claim
Patent Images

1. Apparatus for treating lime slurry in a slurry treatment system, comprising:

  • (a) a slurry tank (14, 114) for a watery lime slurry having lime particles and grit particles therein;

    (b) delivering line means (16, 18, 20;

    216, 218, 220) for delivering slurry from the slurry tank to an extraction line (24, 124;

    19, 119;

    29, 229), for extracting a portion of the slurry delivered from the slurry tank;

    (c) gravity separation means (23, 123, 32;

    123, 132) for removing some grit from the lime slurry while allowing other grit to remain;

    wherein said means for removing is free of any means for adding dilution water to the gravity separation means (23, 32;

    123, 132);

    (d) conduit means (21, 122) substantially continuously delivering slurry taken from the slurry tank to the gravity separation means; and

    (e) recirculation means (40, 140) for continuously recirculating the rest of the slurry to the slurry tank after separation of some of the grit from the slurry.

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