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WATER TREATMENT PROCESS AND WATER TREATMENT SYSTEM

  • US 20150203383A1
  • Filed: 03/30/2015
  • Published: 07/23/2015
  • Est. Priority Date: 07/05/2013
  • Status: Active Grant
First Claim
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1. A water treatment process, comprising:

  • a scale inhibitor supplying step of supplying a calcium scale inhibitor which is a scale inhibitor for inhibiting the deposition of a scale containing calcium and a silica scale inhibitor which is a scale inhibitor for inhibiting the deposition of silica to water to be treated containing Ca ions, SO4 ions, carbonate ions and silica;

    a demineralizing step of separating the water to be treated into concentrated water in which the Ca ions, the SO4 ions, the carbonate ions and the silica are concentrated and treated water after the scale inhibitor supplying step; and

    a crystallizing step of supplying seed crystals of gypsum to the concentrated water so that gypsum is crystallized from the concentrated water.

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