JPS5498041A - Evaporation type system for converting seawater into fresh water - Google Patents

Evaporation type system for converting seawater into fresh water

Info

Publication number
JPS5498041A
JPS5498041A JP417978A JP417978A JPS5498041A JP S5498041 A JPS5498041 A JP S5498041A JP 417978 A JP417978 A JP 417978A JP 417978 A JP417978 A JP 417978A JP S5498041 A JPS5498041 A JP S5498041A
Authority
JP
Japan
Prior art keywords
seed crystals
brine
filtration
change
valve
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.)
Pending
Application number
JP417978A
Other languages
Japanese (ja)
Inventor
Toshimi Mutsukushi
Sankichi Takahashi
Toshio Sawa
Shigeoki Nishimura
Takayuki Matsumoto
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
Original Assignee
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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP417978A priority Critical patent/JPS5498041A/en
Publication of JPS5498041A publication Critical patent/JPS5498041A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
    • B01D3/06—Flash distillation
    • B01D3/065—Multiple-effect flash distillation (more than two traps)

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

PURPOSE:To provide the subject system wherein a plurality of filters provided with elastic precision filtration films are connected as seed crystal recovering devices to the circulation path of exhaust brine and arranged so that filtration and inverse cleaning are alternately carried out through change-over valves, whereby adherence of scales to the circulation system is prevented. CONSTITUTION:Exhaust brine containing seed crystals is introduced by opening a change-over valve 24 into a filter 9 having a large number of filtration members formed by extending elastic filtration films on tubular supporters, and the brine not containing filtered seed crystals is exhausted through a valve 28. When a large quantity of seed crystals are adsorbed to the filtration film surface and hence the filtration pressure is increased, a change-over valve 25 is opened to change over to a filter 10 and to exhaust the brine not containing seed crystals through a valve 29. Upon this occasion, when valves 24 and 28 are closed but valves 26 and 30 are opened and an inverse washing pump 11 is operated, the brine not containing seed crystals flows into the filter 9 from the inverse direction and exfoliates and removes seed crystals which have been arrested by the filtration films, the seed crystals being supplied in the circulating brine together with the supplied seawater.
JP417978A 1978-01-20 1978-01-20 Evaporation type system for converting seawater into fresh water Pending JPS5498041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP417978A JPS5498041A (en) 1978-01-20 1978-01-20 Evaporation type system for converting seawater into fresh water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP417978A JPS5498041A (en) 1978-01-20 1978-01-20 Evaporation type system for converting seawater into fresh water

Publications (1)

Publication Number Publication Date
JPS5498041A true JPS5498041A (en) 1979-08-02

Family

ID=11577475

Family Applications (1)

Application Number Title Priority Date Filing Date
JP417978A Pending JPS5498041A (en) 1978-01-20 1978-01-20 Evaporation type system for converting seawater into fresh water

Country Status (1)

Country Link
JP (1) JPS5498041A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6388002A (en) * 1986-10-02 1988-04-19 Amajin Kk Method and equipment for preventing adhesion of scale to heat transfer surface of concentrating boiler

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49123976A (en) * 1973-01-22 1974-11-27

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49123976A (en) * 1973-01-22 1974-11-27

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6388002A (en) * 1986-10-02 1988-04-19 Amajin Kk Method and equipment for preventing adhesion of scale to heat transfer surface of concentrating boiler

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