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:
Nov. 17, 2015
Filed:
Aug. 24, 2012
Kohei Inoue, Kanagawa, JP;
Shinya Ui, Tokyo, JP;
Yoshitaka Kawahara, Yokohama, JP;
Ichiro Myougan, Yokohama, JP;
Yasuyuki Hishi, Takizawa, JP;
Daisuke Fukuda, Morioka, JP;
Kohei Inoue, Kanagawa, JP;
Shinya Ui, Tokyo, JP;
Yoshitaka Kawahara, Yokohama, JP;
Ichiro Myougan, Yokohama, JP;
Yasuyuki Hishi, Takizawa, JP;
Daisuke Fukuda, Morioka, JP;
FUJI ELECTRIC CO., LTD., Kawasaki-Shi, Kanagawa, JP;
Abstract
A scale inhibition method for injecting an alkaline agent and a chelating agent into a fluid containing at least silica and calcium ions, and inhibiting generation of scale, includes feeding the chelating agent and the alkaline agent into piping channeling the fluid, mixing the fluid while causing the fluid to flow in a chemical-mixing part provided in the piping, and when either a pressure difference between the pressures or a flow rate difference between the rates of fluid flow at an inlet and an outlet of the chemical-mixing part exceeds a preset upper threshold, increasing the amount of the chelating agent fed, and feeding the chelating agent at an increased feed amount until the pressure difference or flow rate difference falls below a preset lower threshold.