公开(公告)号：US10392283B2

公开(公告)日：2019-08-27

申请号：US14513445

申请日：2014-10-14

Applicant: JFE ENGINEERING CORPORATION

Inventor： Shigeki Fujiwara ,  Eri Watanabe ,  Yohei Tomida ,  Koji Fuchigami ,  Takeshi Tsuji ,  Yasuhiro Minamizato ,  Yasuto Ando ,  Yoshitaka Moriyama

IPC: C02F9/00 ,  B01D61/04 ,  B01D61/16 ,  B01D61/58 ,  C02F1/44 ,  C02F1/66 ,  C02F1/04 ,  C02F1/52 ,  B01D61/02 ,  B01D61/14 ,  C02F1/56 ,  C02F101/10 ,  C02F103/06 ,  C02F103/10

Abstract: A method and apparatus for removing soluble silica efficiently from accompanied water, produced from wells containing calcium ion, soluble silica, and sulfate ion, and not clogging a reverse osmosis membrane in the reverse osmosis membrane treatment process after that, includes adding a magnesium salt to mix with the accompanied water under alkaline conditions to produce insoluble silica and calcium sulfate. A microfiltration (MF) membrane treatment process includes treating a first reaction solution obtained in said magnesium salt adding process, with a microfiltration membrane to separate insolubilized silica and calcium sulfate by filtration. An acid adding process includes adding an acid to and mixing with filtrate obtained in the MF membrane treatment process to render a pH value of the filtrate on the range from 5 to 9 and a negative Langeliar saturation index. A reverse osmosis membrane treatment process includes treating a second reaction solution, obtained in the acid adding process, with a reverse osmosis membrane to obtain fresh water and membrane concentrates.

公开(公告)号：US20150034556A1

公开(公告)日：2015-02-05

申请号：US14513445

申请日：2014-10-14

Applicant: JFE ENGINEERING CORPORATION

Inventor： Shigeki Fujiwara ,  Eri Watanabe ,  Yohei Tomida ,  Koji Fuchigami ,  Takeshi Tsuji ,  Yasuhiro Minamizato ,  Yasuto Ando ,  Yoshitaka Moriyama

IPC: C02F9/00 ,  C02F1/04 ,  C02F1/44 ,  C02F1/52 ,  C02F1/66

CPC classification number: C02F9/00 ,  B01D61/025 ,  B01D61/04 ,  B01D61/147 ,  B01D61/16 ,  B01D61/58 ,  B01D2311/04 ,  B01D2311/08 ,  B01D2311/12 ,  B01D2311/263 ,  B01D2311/2642 ,  B01D2311/2673 ,  C02F1/04 ,  C02F1/048 ,  C02F1/441 ,  C02F1/444 ,  C02F1/52 ,  C02F1/5236 ,  C02F1/56 ,  C02F1/66 ,  C02F2001/5218 ,  C02F2101/10 ,  C02F2101/101 ,  C02F2103/06 ,  C02F2103/10 ,  B01D2311/18

Abstract: A method and apparatus for removing soluble silica efficiently from accompanied water, produced from wells containing calcium ion, soluble silica, and sulfate ion, and not clogging a reverse osmosis membrane in the reverse osmosis membrane treatment process after that, includes adding a magnesium salt to mix with the accompanied water under alkaline conditions to produce insoluble silica and calcium sulfate. A microfiltration (MF) membrane treatment process includes treating a first reaction solution obtained in said magnesium salt adding process, with a microfiltration membrane to separate insolubilized silica and calcium sulfate by filtration. An acid adding process includes adding an acid to and mixing with filtrate obtained in the MF membrane treatment process to render a pH value of the filtrate on the range from 5 to 9 and a negative Langeliar saturation index. A reverse osmosis membrane treatment process includes treating a second reaction solution, obtained in the acid adding process, with a reverse osmosis membrane to obtain fresh water and membrane concentrates.

Abstract translation: 一种从含有钙离子，可溶性二氧化硅和硫酸根离子的孔产生的伴随水中有效除去可溶性二氧化硅的方法和装置，之后在反渗透膜处理过程中不堵塞反渗透膜，包括将镁盐加入 在碱性条件下与伴生水混合，生成不溶性二氧化硅和硫酸钙。 微滤（MF）膜处理方法包括处理在所述镁盐添加方法中获得的第一反应溶液与微滤膜，以通过过滤分离不溶的二氧化硅和硫酸钙。 酸添加方法包括向MF膜处理过程中获得的滤液中加入酸并与其混合，使滤液的pH值在5至9的范围内，负的Langeliar饱和指数。 反渗透膜处理方法包括用反渗透膜处理在酸添加过程中获得的第二反应溶液以获得淡水和膜浓缩物。