JPS6475004A - Method and apparatus for turning salt water into fresh water by electrodialysis - Google Patents

Method and apparatus for turning salt water into fresh water by electrodialysis

Info

Publication number
JPS6475004A
JPS6475004A JP62229750A JP22975087A JPS6475004A JP S6475004 A JPS6475004 A JP S6475004A JP 62229750 A JP62229750 A JP 62229750A JP 22975087 A JP22975087 A JP 22975087A JP S6475004 A JPS6475004 A JP S6475004A
Authority
JP
Japan
Prior art keywords
water
concentration
salt
electrodialysis
electric power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP62229750A
Other languages
Japanese (ja)
Other versions
JPH0757309B2 (en
Inventor
Osamu Kuroda
Katsuya Ebara
Sankichi Takahashi
Ryota Doi
Toshio Ogawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Mitsubishi Power Ltd
Original Assignee
Babcock Hitachi KK
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Babcock Hitachi KK, Hitachi Ltd filed Critical Babcock Hitachi KK
Priority to JP62229750A priority Critical patent/JPH0757309B2/en
Publication of JPS6475004A publication Critical patent/JPS6475004A/en
Publication of JPH0757309B2 publication Critical patent/JPH0757309B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/124—Water desalination

Landscapes

  • Separation Using Semi-Permeable Membranes (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

PURPOSE:To make it possible to directly utilize fluctuating power supply with almost no electricity storage, by suitably selecting the proportions of electrodialysis tanks for respective desalting operations at respective salt concentration levels, in a process in which original water is step-wise desalted so as to have a medium salt concentration and then to have a low salt concentration through step-wise performed batch operations employing a plurality of electrodialysis tanks. CONSTITUTION:Original water from an original water tank 9 is desalted in a plurality of electrodialysis tanks 8, while salt water is being circulated through a circulating tank 10. In this electrodialysis apparatus for turning salt water into fresh water, either of two operations can be selected: a high concentration operation in which the original water is desalted to the extent that it has a salt concentration intermediate between the salt concentration of the original water and that of fresh water, and fed to a storage tank 11 for intermediate-concentration water; and a low concentration operation in which the intermediate- concentration water is desalted and turned into fresh water, and fed to a fresh water storage tank 12. In the case where there is a large amount of electric power supply to the apparatus for turning salt water into fresh water, the proportion of electrodialysis tanks for high concentration operation is heightened. On the other hand, in the case where the amount of electric power available is small due to the fluctuations in the amount of electric power generated or the increase in the electric power consumption by other equipments, the proportion of electrodialysis tanks for low concentration operation is heightened. Thus, the amount of electric power consumed by the whole apparatus for turning salt water into fresh water is controlled with time to proper values.
JP62229750A 1987-09-16 1987-09-16 Electrodialysis desalination method and device Expired - Lifetime JPH0757309B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62229750A JPH0757309B2 (en) 1987-09-16 1987-09-16 Electrodialysis desalination method and device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62229750A JPH0757309B2 (en) 1987-09-16 1987-09-16 Electrodialysis desalination method and device

Publications (2)

Publication Number Publication Date
JPS6475004A true JPS6475004A (en) 1989-03-20
JPH0757309B2 JPH0757309B2 (en) 1995-06-21

Family

ID=16897098

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62229750A Expired - Lifetime JPH0757309B2 (en) 1987-09-16 1987-09-16 Electrodialysis desalination method and device

Country Status (1)

Country Link
JP (1) JPH0757309B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009220062A (en) * 2008-03-18 2009-10-01 Fuji Electric Holdings Co Ltd Water treatment system
JP2014124593A (en) * 2012-12-27 2014-07-07 Hitachi Ltd Water supply management support system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009220062A (en) * 2008-03-18 2009-10-01 Fuji Electric Holdings Co Ltd Water treatment system
JP2014124593A (en) * 2012-12-27 2014-07-07 Hitachi Ltd Water supply management support system

Also Published As

Publication number Publication date
JPH0757309B2 (en) 1995-06-21

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