Title:
FORWARD OSMOSIS WATER TREATMENT APPARATUS AND METHOD
Document Type and Number:
Japanese Patent JP2021159875
Kind Code:
A
Abstract:
To provide a forward osmosis water treatment apparatus which can prevent a concentrated solution from flowing out from a dilute solution outlet and can prevent a dilute solution from flowing out from a concentrated solution outlet.SOLUTION: An apparatus includes: a forward osmosis membrane module which brings salt-containing water to be treated and a thermosensitive agent aqueous solution having a cloud point into contact with each other through a semipermeable membrane to obtain a diluted thermosensitive agent aqueous solution 24 and membrane-concentrated water; heating means which heats the diluted thermosensitive agent aqueous solution to a temperature equal to or above the cloud point of the thermosensitive agent aqueous solution; a gravity separation tank 3 which separates by gravity the diluted thermosensitive agent aqueous solution heated and phase-separated, into a layer of a concentrated solution and a layer of a dilute solution; cooling/recycling means in which a separated concentrated solution 23 is cooled to a temperature equal to or below the cloud point of the thermosensitive agent aqueous solution, and then recycled to the forward osmosis membrane module to be reused while being made into a dilute solution 26; and a membrane filtration device which obtains membrane filtration water and finish membrane-concentrated water by the finish membrane treatment of the separated dilute solution. Between a dilute solution outlet 35 and a concentrated solution outlet 36 of the gravity separation tank, there are provided detectors 31A-D capable of detecting which one of the dilute solution and the concentrated solution is present.SELECTED DRAWING: Figure 2
Inventors:
KUNUGI AKIRA
TSUJI TAKESHI
FUCHIGAMI KOJI
TOMURA KEIJI
SATO YUYA
OSATO AYA
EGAWA TAKUYA
TSUJI TAKESHI
FUCHIGAMI KOJI
TOMURA KEIJI
SATO YUYA
OSATO AYA
EGAWA TAKUYA
Application Number:
JP2020065474A
Publication Date:
October 11, 2021
Filing Date:
April 01, 2020
Export Citation:
Assignee:
JFE ENG CORP
International Classes:
B01D61/00; B01D17/025; B01D61/58; C02F1/44
Attorney, Agent or Firm:
Masahiro Tanaka