WO2019181041A1 - Procédé et dispositif de traitement par osmose inverse - Google Patents

Procédé et dispositif de traitement par osmose inverse Download PDF

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Publication number
WO2019181041A1
WO2019181041A1 PCT/JP2018/039490 JP2018039490W WO2019181041A1 WO 2019181041 A1 WO2019181041 A1 WO 2019181041A1 JP 2018039490 W JP2018039490 W JP 2018039490W WO 2019181041 A1 WO2019181041 A1 WO 2019181041A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
reverse osmosis
heat pump
heat
osmosis membrane
Prior art date
Application number
PCT/JP2018/039490
Other languages
English (en)
Japanese (ja)
Inventor
新井　浩一
寅夫 三田
光紀 中平
拓自 彦坂
Original Assignee
栗田工業株式会社
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 栗田工業株式会社 filed Critical 栗田工業株式会社
Publication of WO2019181041A1 publication Critical patent/WO2019181041A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/04—Feed pretreatment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/06—Energy recovery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/08—Apparatus therefor
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis

Definitions

  • the present invention relates to a reverse osmosis treatment method and apparatus for treating water using a reverse osmosis membrane device.
  • the water supply temperature is heated to about 25 ° C. in order to maintain the amount of treated water.
  • the temperature of water is increased to lower the viscosity, the flux of the RO device increases.
  • the temperature of water is increased to increase the silica saturation solubility, the RO device recovery rate is improved.
  • Patent Document 1 in a reverse osmosis treatment method in which water to be treated (raw water) is heated by a heat pump and then subjected to membrane separation treatment by a reverse osmosis membrane device, the reverse osmosis membrane device is used as at least part of the heat source fluid of the heat pump.
  • a reverse osmosis treatment method using concentrated water is described.
  • the present invention aims to reduce the heating cost by heating the water supply to the RO device with a heat pump using RO concentrated water as a heat source, and to effectively use water resources.
  • concentrated water from another reverse osmosis membrane device is used as part of the heat source fluid of the heat pump.
  • the reverse osmosis treatment device of the present invention is a reverse osmosis treatment device that heats raw water with a heat pump and then performs membrane separation treatment with a reverse osmosis membrane device.
  • the concentrated water of the reverse osmosis membrane device is used as at least part of the heat source fluid of the heat pump. It is characterized by comprising means for passing water and means for supplying at least a part of the concentrated water of the reverse osmosis membrane device to the cooling tower as make-up water.
  • the heating cost can be reduced by heating the water supply to the RO device with the heat pump using the RO concentrated water as a heat source.
  • the water resources can be effectively used by supplying the RO concentrated water to the cooling tower.
  • the RO concentrated water is supplied to the cooling tower after heat exchange with a heat pump (that is, after cooling), the load on the cooling tower is not increased and the thermal efficiency is good.
  • the concentrated water of other reverse osmosis membrane devices can also be used as a water resource.
  • FIG. 1 is a block diagram of a reverse osmosis treatment apparatus according to an embodiment.
  • the raw water to be RO-treated (in this embodiment, clean water) is supplied from the pipe 1 to the heat exchanger 2, heated, and then supplied from the pipe 3 to the heater (electric heater, steam heat exchanger, etc.) 4. After being further heated, it is supplied to the RO device 6 through the pipe 5.
  • the permeated water of the RO device 6 is taken out from the pipe 7 as treated water, and the concentrated water flows out to the pipe 8 and is used as a heat source fluid of the heat pump 20.
  • the concentrated water from the pipe 8 is stored in the concentrated water tank 9.
  • Concentrated water from a reverse osmosis membrane device installed in a system other than the reverse osmosis membrane device 6 is also introduced into the concentrated water tank 9 via a pipe 10.
  • the concentrated water in the tank 9 is sent to the evaporator 21 of the heat pump 20 through the pump 11 and the pipe 12.
  • the medium water heated by the condenser 23 of the heat pump 20 (water as a heat transfer medium) is circulated through the heat source fluid flow path of the heat exchanger 2.
  • the heat pump 20 compresses the heat medium such as alternative CFC from the evaporator 21 by the compressor 22 and introduces it into the condenser 23, and introduces the heat medium from the condenser 23 into the evaporator 21 through the expansion valve 24. It is configured as follows.
  • the medium water from the heat exchanger 2 is introduced into the condenser 23 via the pipe 25, the tank 28 and the pump 27, and the medium water heated by the condenser 23 is sent to the heat exchanger 2 via the pipe 26. .
  • the concentrated water in the tank 9 is introduced from the pipe 12 into the heat source fluid flow path of the evaporator 21.
  • the concentrated water cooled by heat exchange is sent to the cooling tower 14 via the pipe 13 as makeup water.
  • Clean water is also sent to the cooling tower 14 as makeup water through the pipe 15.
  • the makeup water is supplied to the cooling tower 4 through a ball tap (not shown).
  • the following measures i), ii) or iii) are taken to prevent scale and slime in the evaporator 21, the RO device 6, and the pipes 8, 12, and 13.
  • the pH of the raw water is adjusted by the RO device 6 and the heat pump evaporator 21 so that silica scale does not precipitate.
  • the pH is set to 9 or more (for example, 9 to 11) under the condition that the Ca hardness of the raw water is 5 mg / L or less.
  • the pH of the raw water is set to 6 or less (for example, 4 to 6).
  • the pH of the raw water may be 6 or less (for example, 4 to 6), or a water softener may be provided in front of the RO membrane to remove the hardness component.
  • a scale inhibitor for calcium scale may be added to raw water, and in that case, the Langeria index may exceed zero.
  • the Langeria index may be 0.5 or less by using the organic polymer scale inhibitor.
  • the above embodiment is an example of the present invention, and the present invention may be other than the above.
  • well water or industrial water other than tap water may be used as raw water.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Nanotechnology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

L'invention concerne un procédé selon lequel de l'eau brute est alimentée à partir d'une tuyauterie (1), chauffée avec un échangeur de chaleur (2) et un dispositif de chauffage (4), puis alimentée à un dispositif d'osmose inverse (6). L'eau qui a circulé dans le dispositif d'osmose inverse (6) est prélevée de la tuyauterie (7) sous forme d'eau traitée, et l'eau concentrée circule à travers la tuyauterie (8) et un réservoir (9) jusqu'à l'évaporateur (21) d'une pompe à chaleur (20) en tant que fluide de source de chaleur de la pompe à chaleur (20). L'eau de milieu chauffée par un condenseur (23) de la pompe à chaleur (20) est mise en circulation dans un trajet d'écoulement de fluide de source de chaleur dans l'échangeur de chaleur (2). L'eau condensée qui a été chauffée par l'évaporateur (21) est alimentée à une tour de refroidissement (14) en tant qu'eau de réalimentation.
PCT/JP2018/039490 2018-03-20 2018-10-24 Procédé et dispositif de traitement par osmose inverse WO2019181041A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018053237A JP6590016B2 (ja) 2018-03-20 2018-03-20 逆浸透処理方法及び装置
JP2018-053237 2018-03-20

Publications (1)

Publication Number Publication Date
WO2019181041A1 true WO2019181041A1 (fr) 2019-09-26

Family

ID=67986817

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/039490 WO2019181041A1 (fr) 2018-03-20 2018-10-24 Procédé et dispositif de traitement par osmose inverse

Country Status (2)

Country Link
JP (1) JP6590016B2 (fr)
WO (1) WO2019181041A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS634808A (ja) * 1986-06-24 1988-01-09 Takuma Co Ltd 逆浸透膜装置システム
JP2002310595A (ja) * 2001-04-12 2002-10-23 Ebara Corp 冷却装置
JP2009039599A (ja) * 2007-08-06 2009-02-26 Kurita Water Ind Ltd 水処理システム
JP2012091118A (ja) * 2010-10-27 2012-05-17 Japan Organo Co Ltd 水処理システム及び水処理方法
JP2014030777A (ja) * 2012-08-01 2014-02-20 Jfe Engineering Corp 焼却プラント排水の処理方法および処理設備
JP2016190224A (ja) * 2015-03-31 2016-11-10 栗田工業株式会社 水処理方法及び装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS634808A (ja) * 1986-06-24 1988-01-09 Takuma Co Ltd 逆浸透膜装置システム
JP2002310595A (ja) * 2001-04-12 2002-10-23 Ebara Corp 冷却装置
JP2009039599A (ja) * 2007-08-06 2009-02-26 Kurita Water Ind Ltd 水処理システム
JP2012091118A (ja) * 2010-10-27 2012-05-17 Japan Organo Co Ltd 水処理システム及び水処理方法
JP2014030777A (ja) * 2012-08-01 2014-02-20 Jfe Engineering Corp 焼却プラント排水の処理方法および処理設備
JP2016190224A (ja) * 2015-03-31 2016-11-10 栗田工業株式会社 水処理方法及び装置

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JP2019162600A (ja) 2019-09-26
JP6590016B2 (ja) 2019-10-16

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