The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 30, 2014
Filed:
Nov. 16, 2010
Kazuhisa Takeuchi, Tokyo, JP;
Yoshiaki Ito, Tokyo, JP;
Hidemasa Kakigami, Tokyo, JP;
Hideo Iwahashi, Tokyo, JP;
Katsunori Matsui, Tokyo, JP;
Kenji Tanaka, Tokyo, JP;
Kazuhisa Takeuchi, Tokyo, JP;
Yoshiaki Ito, Tokyo, JP;
Hidemasa Kakigami, Tokyo, JP;
Hideo Iwahashi, Tokyo, JP;
Katsunori Matsui, Tokyo, JP;
Kenji Tanaka, Tokyo, JP;
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Abstract
A desalination apparatus includes a pretreatment devicehaving a pretreatment membranethat filters suspended matters in raw waterwith added chlorine-containing water, a reverse osmosis membrane devicehaving a reverse osmosis membranethat removes a salt content from filtrate watersupplied from the pretreatment deviceto produce permeated water, and a reducing-agent injection devicethat neutralizes the added chlorine on an upstream side of the reverse osmosis membrane device. The reducing-agent injection deviceextracts a partof the filtrate water, adds metering SBS solutionto the part, obtains a maximum change point (equivalence point) of the oxidation-reduction potential of a reducing agent and chlorine, obtains reducing-agent additive concentration (Csm) corresponding to the equivalence point, and supplies the SBS solutioncorresponding to the concentration to the filtrate waterto thereby neutralize the chlorine.