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. 25, 2018
Filed:
Mar. 30, 2015
Mitsubishi Heavy Industries, Ltd., Tokyo, JP;
Masayuki Eda, Tokyo, JP;
Susumu Okino, Tokyo, JP;
Ryuji Yoshiyama, Tokyo, JP;
Hideaki Sakurai, Tokyo, JP;
Nobuyuki Ukai, Tokyo, JP;
Hideo Suzuki, Tokyo, JP;
Hiroshi Nakashoji, Tokyo, JP;
Shigeru Yoshioka, Tokyo, JP;
MITSUBISHI HEAVY INDUSTRIES ENGINEERING, LTD., Kanagawa, JP;
Abstract
A water treatment system includes a first demineralizing section that separates water to be treated including Ca ions, SOions, and carbonate ions into concentrated water and treated water; a crystallizing section including a first crystallizing tankthat crystallizes gypsum from the concentrated water and a first seed crystal supplying sectionthat supplies seed crystals of gypsum to the first crystallizing tank; a first pH measuring sectionthat measures the pH of the first concentrated water in the first crystallizing tank; and a first controlling section that reduces the amount of the seed crystals of the gypsum to be supplied when the measured pH falls within a pH range in which a scale inhibition function of the calcium scale inhibitor is reduced, and increases the amount of the seed crystals of the gypsum to be supplied when the measured pH is beyond the pH range.