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:
Apr. 24, 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, LTD., Tokyo, JP;
Abstract
In a water treatment system () and a water treatment process, a scale inhibitor is supplied to water to be treated containing Ca ions, SOions, carbonate ions, and silica, and the water to be treated is adjusted to a pH at which silica is soluble. The pH-adjusted water to be treated containing the calcium scale inhibitor is separated in a demineralizing section () into concentrated water and treated water. In a crystallizing section (), seed crystals of gypsum are supplied to the concentrated water, whereby gypsum is crystallized and removed. Silica in the water to be treated is removed from the concentrated water on the downstream side of the crystallizing section (). Calcium carbonate in the water to be treated is removed from the concentrated water on the upstream side of the demineralizing section () or the downstream side of the crystallizing section ().