WO2019180789A1 - Dispositif de traitement d'eau et procédé de traitement d'eau - Google Patents

Dispositif de traitement d'eau et procédé de traitement d'eau Download PDF

Info

Publication number
WO2019180789A1
WO2019180789A1 PCT/JP2018/010872 JP2018010872W WO2019180789A1 WO 2019180789 A1 WO2019180789 A1 WO 2019180789A1 JP 2018010872 W JP2018010872 W JP 2018010872W WO 2019180789 A1 WO2019180789 A1 WO 2019180789A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
membrane
unit
separation
treatment
Prior art date
Application number
PCT/JP2018/010872
Other languages
English (en)
Japanese (ja)
Inventor
嘉晃 伊藤
英正 垣上
英夫 鈴木
英夫 岩橋
Original Assignee
三菱重工エンジニアリング株式会社
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 三菱重工エンジニアリング株式会社 filed Critical 三菱重工エンジニアリング株式会社
Priority to PCT/JP2018/010872 priority Critical patent/WO2019180789A1/fr
Publication of WO2019180789A1 publication Critical patent/WO2019180789A1/fr

Links

Images

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
    • B01D61/08—Apparatus therefor
    • 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
    • B01D61/58—Multistep processes
    • 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
    • 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
    • Y02A20/131—Reverse-osmosis

Definitions

  • the present invention relates to a water treatment apparatus and a water treatment method, and for example, relates to a water treatment apparatus and a water treatment method in which water to be treated is separated by a separation membrane.
  • An object of the present invention is to provide a water treatment apparatus and a water treatment method capable of highly concentrating concentrated water after membrane separation.
  • a first membrane treatment unit comprising at least one membrane separation unit having a first separation membrane for membrane separation of treated water into first concentrated water and first permeated water; A first separation unit having a second separation membrane having a lower desalination rate than the first separation membrane for separating the first concentrated water into a second permeated water and a second concentrated water; Two membrane treatment units, wherein the first membrane treatment unit discharges at least part of the first permeated water to the outside of the first membrane treatment unit, and is membrane-separated from the treated water.
  • the first concentrated water is supplied to the second membrane treatment unit, and the second membrane treatment unit supplies at least a part of the second permeated water to the treated water supplied to the first membrane treatment unit.
  • the second concentrated water separated from the first concentrated water is discharged.
  • the first membrane treatment step at least a part of the first permeate is discharged, and the first concentrated water separated from the treated water is supplied to the membrane separation unit.
  • the second membrane treatment step at least a part of the second permeated water is supplied to the treated water supplied to the membrane separation unit, while the second concentration is membrane-separated from the first concentrated water. It is characterized by draining water.
  • a water treatment apparatus and a water treatment method capable of highly concentrating concentrated water after membrane separation can be realized.
  • FIG. 1A is a mimetic diagram showing an example of the water treatment equipment concerning a 1st embodiment.
  • FIG. 1B is a schematic diagram illustrating another example of the water treatment device according to the first embodiment.
  • FIG. 2A is a schematic diagram illustrating another example of the water treatment device according to the first embodiment.
  • FIG. 2B is a schematic diagram illustrating another example of the water treatment device according to the first embodiment.
  • FIG. 3A is a schematic diagram illustrating an example of a water treatment device according to the second embodiment.
  • FIG. 3B is a schematic diagram illustrating another example of the water treatment device according to the second embodiment.
  • FIG. 4A is a schematic diagram illustrating an example of a water treatment device according to the third embodiment.
  • FIG. 4B is a schematic diagram illustrating another example of the water treatment device according to the third embodiment.
  • Drawing 1A is a mimetic diagram showing an example of the water treatment equipment concerning a 1st embodiment.
  • the water treatment apparatus 1A according to the present embodiment, contaminants such as solids in sea water is preliminarily reduced by pre-treatment such as solid-liquid separation and filtration process as the water to be treated W 1
  • a membrane separation module 11 to which pretreated water is supplied is provided.
  • the membrane separation module 11 includes a first membrane treatment unit 111 and a second membrane treatment unit 112 arranged in the same pressure vessel (vessel) 110.
  • the first membrane treatment unit 111 is arranged on the inlet side of the treated water W 1 in the pressure vessel 110, and the second membrane treatment unit 112 is downstream of the first membrane treatment unit 111 in the flow direction of the treated water W 1. Placed in.
  • the first layer processing section 111 membrane separation in the water to be treated W 1 the first permeate W 2 and the first concentrated water (not shown).
  • the second membrane treatment unit 112 performs membrane separation of the first concentrated water into the second permeated water W 3 and the second concentrated water W 4 .
  • the membrane separation module 11 discharges the first permeated water W 2 and the second concentrated water W 4 to the outside, and supplies the second permeated water W 3 to the treated water W 1 supplied to the membrane separation module 11. .
  • the first layer processing section 111 a plurality of (four in this embodiment) having a first separation film 111a to membrane separation to the permeate and the concentrated water concentrated water supplied from the water to be treated W 1 or preceding Membrane separation unit: provided with a first membrane separation unit 111-1 to a fourth membrane separation unit 111-4.
  • the first separation membrane 111a is not limited as long as it can film separated into permeated water and concentrated water concentrated water supplied from the water to be treated W 1 or preceding, e.g., reverse osmosis (RO: Reverse Osmosis) A membrane or the like is used.
  • the first separation membrane 111a preferably has a desalination rate of 95% or more, more preferably 97% or more, and still more preferably 99% or more.
  • the first membrane treatment unit 111 includes four membrane separation units 111-1 to 111-4.
  • the first membrane treatment unit 111 includes at least one membrane separation unit. The number of membrane separation parts can be changed as appropriate.
  • the second membrane treatment unit 112 includes a plurality of (three in this embodiment) second separation membranes 112a that separate the first concentrated water or the concentrated water supplied from the previous stage into permeated water and concentrated water.
  • Membrane separation unit provided with a first membrane separation unit 112-1 to a third membrane separation unit 112-3.
  • the second separation membrane 112a the desalination rate is relatively lower than that of the first separation membrane 111a of the first membrane treatment unit 111 and is supplied from the first concentrated water supplied from the first membrane treatment unit 111 or from the previous stage.
  • the concentrated water can be separated into permeated water and concentrated water.
  • monovalent ion components such as sodium ions (Na + ) and chloride ions (Cl ⁇ ), calcium ions (Ca 2+ ), magnesium ions (Mg 2+ ), and sulfate ions (A material having a relatively high transmittance for divalent ion components such as SO 4 2 ⁇ ) relative to the first separation membrane 111a may be used.
  • the second membrane processing unit 112 may include at least one membrane separation unit, and the membrane The number of separation parts can be changed as appropriate.
  • the first membrane separation unit 111-1 The first membrane separation unit 111-1, the membrane separation treatment water W 1 to the permeate and the concentrated water.
  • the first membrane separation unit 111-1 as well as discharged to the outside of the water treatment apparatus 1A as a first permeate W 2 permeate obtained by membrane separation, the concentrated water obtained by membrane separation second Supplied to the membrane separator 111-2.
  • the second membrane separation unit 111-2 membrane-separates the concentrated water supplied from the first membrane separation unit 111-1 into permeated water and concentrated water.
  • the second membrane separation unit 111-2 film while discharged outside of the water treatment device 1A of the permeated water obtained as the first permeate W 2 by the separation, a third concentrated water obtained by membrane separation It supplies to the membrane separation part 111-3.
  • the third membrane separation unit 111-3 membrane-separates the concentrated water supplied from the second membrane separation unit 111-2 into permeated water and concentrated water.
  • the third membrane separation unit 111-3 as well as discharged to the outside of the water treatment apparatus 1A as a first permeate W 2 permeate obtained by membrane separation, the concentrated water obtained by membrane separation fourth Supplied to the membrane separator 111-4.
  • the fourth membrane separation unit 111-4 membrane-separates the concentrated water supplied from the third membrane separation unit 111-3 into permeated water and concentrated water.
  • the fourth membrane separation unit 111-4, as well as discharged to the outside of the water treatment apparatus 1A as a first permeate W 2 permeate obtained by membrane separation, the concentrated water obtained by membrane separation first Concentrated water is supplied to the first membrane separation unit 112-1 of the second membrane processing unit 112.
  • the first membrane treatment unit 111 includes a plurality of first membrane separation units 111-1 to 111-4 including the first separation membrane 111a connected in series.
  • the series connection means that the first concentrated water of the first membrane separation unit 111-1 to the third membrane separation unit 111-3 on the upstream side is the second membrane separation unit 111-2 to the fourth of the next stage.
  • the first permeated water W 2 supplied to the membrane separation unit 111-4 and discharged from the first membrane separation unit 111-1 to the fourth membrane separation unit 111-4 is discharged to the outside of the first membrane treatment unit 111.
  • the first membrane treatment unit 111 separates the treated water W 1 into the first permeated water W 2 and the first concentrated water obtained by sequentially concentrating the treated water W 1 , and the first permeated water W 2. Can be discharged to the outside of the water treatment apparatus 1 ⁇ / b> A, and the first concentrated water concentrated to a high concentration can be supplied to the second membrane treatment unit 112.
  • the first membrane separation unit 112-1 membrane-separates the first concentrated water supplied from the fourth membrane separation unit 111-4 into permeated water and concentrated water.
  • the first membrane separation unit 112-1 a permeate obtained by membrane separation as a second permeate W 3, and supplies the water to be treated W 1 supplied to the membrane separation module 11, the membrane separation The obtained concentrated water is supplied to the second membrane separation unit 112-2.
  • the second membrane separation unit 112-2 membrane-separates the concentrated water supplied from the first membrane separation unit 112-1 into permeated water and concentrated water.
  • the second membrane separation unit 112-2 a permeate obtained by membrane separation as a second permeate W 3, and supplies the water to be treated W 1 supplied to the membrane separation module 11, the membrane separation The obtained concentrated water is supplied to the third membrane separation unit 112-3.
  • the third membrane separation unit 112-3 membrane-separates the concentrated water supplied from the second membrane separation unit 112-2 into permeated water and concentrated water.
  • the plurality of first membrane separation units 112-1 to 112-3 including the second separation membrane 112a are connected in series.
  • the series connection means that the first concentrated water from the first membrane separation unit 112-1 and the second membrane separation unit 112-2 on the upstream side is connected to the second membrane separation unit 112-2, the third is supplied to the membrane separation unit 112-3, supplying a second permeate W 3 of the first membrane separation unit 112-1 to the third membrane separation unit 112-3 is, from the second membrane unit 112, the membrane separation module 11 It is the to be supplied to the water to be treated W 1, means a state in which the first membrane separation unit 112-1 to the third membrane separation unit 112-3 is connected.
  • the second membrane treatment unit 112 converts the first concentrated water supplied from the first membrane treatment unit 111 into the second concentrated water W 4 obtained by sequentially concentrating the second permeated water W 3 and the first concentrated water. to membrane separation, and supplies the water to be treated W 1 supplied a second permeate W 3 in the membrane separation module 11, the second concentrated water W 4 which is highly enriched in the outside of the water treatment apparatus 1A Can be discharged.
  • the second separation membrane 112a having a relatively low desalting rate relative to the first separation membrane 111a is used for the first membrane separation unit 112-1 to the third membrane separation unit 112-3. , it is possible to increase the permeate osmotic pressure according the second permeate W 3 side.
  • the first membrane separation unit 112-1 to the third membrane separation unit 112-3 as compared with the case of using the first separation layer 111a, it is possible to concentrate the second concentrated water W 4 in a high concentration and Therefore, for example, it is possible to highly concentrate the total dissolved solids (TDS) at 80,000 mg / L or more.
  • TDS total dissolved solids
  • the second separation membrane 112a from the viewpoint of high concentration of the second concentrated water W 4 after membrane separation, desalting ratio thereof is preferably 80% or less of the second separation film 112a, those of 70% or less Is more preferable, and 60% or less is still more preferable. Further, as the second separation membrane 112a, from the viewpoint of reducing the salt of the second permeate W 3, salt rejection thereof is preferably 20% or more, more preferably not less than 30%, 40% or more More preferred. Considering the above, the second separation membrane 112a preferably has a desalination rate of the second separation membrane 112a of 20% to 80% with respect to the desalination rate of the first separation membrane 111a, preferably 30% to 70%. The following are more preferable, and those of 40% or more and 60% or less are more preferable.
  • the second membrane treatment unit 112 has a desalination rate of the second separation membrane 112a of the second membrane separation unit 112-2 and the third membrane separation unit 112-3 provided on the downstream side in the flow direction of the first concentrated water. It is preferable that the desalination rate of the second separation membrane 112a of the first membrane separation unit 112-1 and the second membrane separation unit 112-2 provided on the upstream side is relatively low. Thereby, the water treatment apparatus 1A is provided on the downstream side with respect to the first membrane separation unit 112-1 and the second membrane separation unit 112-2 provided on the upstream side in the flow direction of the first concentrated water.
  • the second concentrated water W 4 is concentrated to a higher concentration.
  • the desalination rate of the second separation membrane 112a may continuously decrease from the first membrane separation unit 112-1 to the third membrane separation unit 112-3, and the desalination rate is stepped. May be reduced.
  • one permeate osmotic pressure is above 1.5 MPa, more preferably not less than 2.0MPa , More preferably 2.5 MPa or more, and even more preferably 3.0 MPa or more.
  • Pretreated water as water to be treated W 1 is supplied to the membrane separation module 11 through the treated water supply line L 1.
  • the treated water W 1 supplied to the membrane separation module 11 is membrane-separated into permeated water and concentrated water by membrane separation by the first membrane separation unit 111-1 of the first membrane treatment unit 111.
  • Diafiltered permeate the first membrane separation unit 111-1, via the permeate discharge line L 2 is discharged to the outside of the water treatment apparatus 1A as a first permeate W 2.
  • the concentrated water membrane-separated by the first membrane separation unit 111-1 is sequentially membrane-separated into permeated water and concentrated water by membrane separation by the second membrane separation unit 111-2 to the fourth membrane separation unit 111-4. . It diafiltered permeate in the second membrane separation unit 111-2 to the fourth membrane separation unit 111-4, discharged via the permeate discharge line L 2 to the outside of the water treatment apparatus 1A as a first permeate W 2 Is done.
  • the first concentrated water sequentially concentrated by the first membrane separation unit 111-1 to the fourth membrane separation unit 111-4 is supplied to the first membrane separation unit 112-1 of the second membrane treatment unit 112.
  • First concentrated water supplied to the first membrane separation unit 112-1 is membrane separation in the second permeate W 3 in the membrane separation of the first membrane separation unit 112-1 and the second concentrated water W 4.
  • the second permeate W 3 which is membrane separated by the first membrane separation unit 112-1 is supplied to the water to be treated W 1 supplied to the membrane separation module 11 through the permeate supply line L 3.
  • the second concentrated water W 4 membrane-separated by the first membrane separation unit 112-1 is separated from the second permeated water W 3 by the membrane separation by the second membrane separation unit 112-2 and the third membrane separation unit 112-3. is membrane separated into 2 concentrate W 4.
  • the high-concentration second concentrated water W 4 sequentially concentrated by membrane separation by the second membrane separation unit 112-2 and the third membrane separation unit 112-3 supplied to W 1 passes through the concentrated water discharge line L 4 . And discharged to the outside of the water treatment apparatus 1A.
  • the first concentrated water membrane-separated by the first separation membrane 111a is converted into a membrane by the second separation membrane 112a having a relatively lower desalting rate than the first separation membrane 111a. since separation, it permeates osmotic pressure of the second permeate W 3 side becomes greater.
  • the water treatment device 1A as compared with the case of sequentially concentrating treatment water W 1 in the first separation film 111a without using the second separation film 112a, concentrated second concentrated water W 4 in a high concentration It becomes possible to do.
  • the total dissolved solids of the second concentrated water W 4 after the membrane separation of the treatment water W 1 is, for example, high-condensable water treatment device 1A is 80,000mg / L or more Can be realized.
  • the water treatment device 1A since then supplied to the second separation film 112a in film may contain the separated impurities second permeate W 3 again second separation films 112a to membrane separation, high purity first the permeate W 2 can be taken out of the water treatment apparatus 1A.
  • membrane process part 112 are arrange
  • FIG. 1B is a schematic diagram illustrating another example of the water treatment device according to the first embodiment.
  • Water treatment apparatus 1B shown in FIG. 1B in addition to the configuration of the water treatment apparatus 1A shown in FIG. 1A, a flow control valve V 2 provided in the permeate discharge line L 2, provided permeate supply line L 3 It was provided with a flow control valve V 3.
  • the flow control valve V 2 controls the first flow rate of the permeated water W 2 through the permeate supply line L 2.
  • the flow control valve V 3 controls the flow rate of the second permeate W 3 through the permeate supply line L 3. Opening of the flow control valve V 2, V 3 is controlled by the control unit 20.
  • the control unit 20 changes the opening of the flow rate control valves V 2 and V 3 to change the amount of the first permeated water W 2 discharged from the first membrane processing unit 111 to the outside of the first membrane processing unit 111 and the amount of water of the second permeate W 3 that is supplied to the water to be treated W 1 supplied to the first layer processing unit 111 controls, respectively.
  • the first film processing section 111 at least a portion of the first permeate W 2 together with discharged to the outside of the first layer processing section 111, the first permeate W 2 at least a The portion can be supplied to the treated water W 1 supplied to the first membrane treatment unit 111 through the permeate supply line L 8 .
  • the second film processing section 112 supplies the water to be treated W 1 supplied at least a portion of the second permeate W 3 in the first layer processing section 111, at least one second permeate W 3 It has become capable of discharging to the outside of the water treatment device 1B by permeated water supply line L 9 and parts.
  • the first permeated water W 2 is supplied again to the first separation membrane 111a and subjected to membrane separation. Therefore, even if there is a large amount of impurities in the water to be treated, the first permeated water W 2 with high purity is used. Can be taken out of the membrane separation apparatus 1B.
  • the permeate discharge line L 2 provided with a flow control valve V 2 an example has been described to provide a flow control valve V 3 to permeate supply line L 3, the flow control valve V 2 , V 3 may be provided with at least one of them.
  • FIG. 2A is a schematic diagram illustrating another example of the water treatment device according to the first embodiment.
  • a water treatment apparatus 2A according to the present embodiment includes a flue gas desulfurization unit 12 that cleans combustion exhaust gas using washing water, and a membrane separation module 11 that is provided at a subsequent stage of the flue gas desulfurization unit 12. Is provided.
  • the flue gas desulfurization unit 12 cleans combustion exhaust gas discharged from a thermal power plant or the like with cleaning water or the like to remove sulfur content in the combustion gas. Further, the flue gas desulfurization unit 12 supplies the desulfurization waste water containing the sulfur content generated by the cleaning of the combustion exhaust gas to the membrane separation module 11 as the treated water W 1 through the treated water supply line L 1 . About another structure, it is the same as that of 1 A of water treatment apparatuses shown in FIG. With such a configuration, the water treatment apparatus 2A, it is possible to highly concentrated the desulfurization effluent as a second concentrate W 4.
  • FIG. 2B is a schematic diagram illustrating another example of the water treatment device according to the first embodiment.
  • the water treatment device 2B includes a reverse osmosis membrane filtration unit 13 including a reverse osmosis membrane 13a instead of the flue gas desulfurization unit 12 of the water treatment device 2A shown in FIG. 2A.
  • Reverse osmosis membrane filtration unit 13 membrane separation in the concentrated water of the seawater W 5 supplied through a seawater supply line L 5 as permeate W 6 and water to be treated W 1.
  • the reverse osmosis membrane filtration unit 13 discharges the permeated water W 6 via the permeate discharge line L 6 and supplies the treated water W 1 to the membrane separation module 11 via the treated water supply line L 1.
  • the water treatment apparatus 2B it is possible to highly concentrated seawater W 5 as a second concentrate W 4.
  • FIG. 3A is a schematic diagram illustrating an example of a water treatment device according to the second embodiment.
  • the water treatment device 3A includes an evaporation processing unit 14 provided in the subsequent stage of the membrane separation module 11 in addition to the configuration of the water treatment device 1A shown in FIG.
  • the evaporation processing unit 14 evaporates moisture from the second concentrated water W 4 supplied from the membrane separation module 11 via the concentrated water discharge line L 4 to obtain steam, and also concentrates as a residue in which impurities are concentrated. And a solidified product is obtained.
  • the evaporation processing unit 14 is not particularly limited as long as it can remove the water in the second concentrated water W 4.
  • various spray dryers such as a desulfurization waste water spray dryer (WSD), various crystallizations, and the like.
  • WSD desulfurization waste water spray dryer
  • a device or the like can be used.
  • the evaporation section 14 when it is not necessary to completely evaporate the water from the second concentrated water W 4, it may be used evaporative concentrator.
  • FIG. 3B is a schematic diagram illustrating another example of the water treatment device according to the second embodiment.
  • the water treatment device 3B includes a post-treatment unit 15 provided in the subsequent stage of the membrane separation module 11 in addition to the configuration of the water treatment device 1A shown in FIG.
  • the post-processing unit 15 adds various chemicals and the like to the second concentrated water W 4 supplied from the membrane separation module 11 via the concentrated water discharge line L 4, so that alkali such as coal ash and lime, cement, and the like are added. Impurities in the second concentrated water W 4 are solidified.
  • the post-treatment unit 15 discharges the post-treatment water W 7 from which impurities are removed via the post-treatment water discharge line L 7 .
  • the post-processing unit 15 may remove impurities such as harmful metals contained in the second concentrated water W 4 by ion exchange treatment using an ion exchange resin and chelate treatment using a chelate resin. By providing a post-processing unit 15 to remove impurities such second concentrated water W in 4, it is possible to discharge by removing the impurities of the second concentrated water W 4.
  • chelating resins such as chelates for mercury adsorption resin and selenium (Se) adsorption chelate resin can also be obtained post-treatment water W 7 that mercury and selenium are removed.
  • chelate resin for mercury adsorption for example, trade name: Eporus (registered trademark), model number: Z-7, Z-100, etc. are used.
  • chelating resin for adsorbing selenium trade names: Eporus (registered trademark), model numbers: SE-3, AS-4, etc. are used.
  • the evaporation unit 14 for evaporated the second concentrated water W 4 since the water of the second concentrate W 4 can be released as a vapor
  • the waste water discharged from the water treatment device 3A can be greatly reduced.
  • the post-processing unit 15 that removes impurities in the second concentrated water W 4 , impurities in the second concentrated water W 4 can be removed and discharged, so that the water is discharged from the water treatment device 3B. It is possible to greatly reduce the amount of wastewater that requires wastewater treatment.
  • FIG. 4A is a schematic diagram illustrating an example of a water treatment device according to the third embodiment.
  • the water treatment apparatus 4A includes a first layer processing section 111 for pre-treated water is supplied as the water to be treated W 1, provided after the first layer processing section 111
  • the second film processing unit 112 is provided.
  • the first layer processing section 111, the water to be treated W 1 supplied to the first layer processing section 111 first permeate W 11A ⁇ first permeate W 14A in the first concentrated water W 11B ⁇ first concentrated water W and membrane separation in the 14B, for discharging the first permeate W 11A ⁇ first permeate W 14A to the outside.
  • the second membrane treatment unit 112 membrane-separates the first concentrated water W 14B into the second permeated water W 15A to the second permeated water W 17A and the second concentrated water W 15B to the second concentrated water W 17B .
  • the second membrane treatment unit 112 discharges the second concentrated water W 17B to the outside, and the treated water W 1 supplied with the second permeated water W 15A to the second permeated water W 17A to the first membrane treatment unit 111. To supply.
  • the first membrane treatment unit 111 includes the treated water W 1 and the first concentrated water W 11B to the first concentrated water W 13B , the first permeated water W 11A to the first permeated water W 14A, and the first concentrated water W 14B .
  • the first layer processing unit 111 a first membrane separation unit 111-1 for-treatment water W 1 is supplied, a second membrane separation unit 111-2 disposed downstream of the first membrane separation unit 111-1 A third membrane separation unit 111-3 provided in the subsequent stage of the second membrane separation unit 111-2, and a fourth membrane separation unit 111-4 provided in the subsequent stage of the third membrane separation unit 111-3.
  • the 1st separation membrane 111a the thing similar to 1 A of water treatment apparatuses which concern on 1st Embodiment mentioned above can be used.
  • the first membrane treatment unit 111 includes four membrane separation units 111-1 to 111-4 will be described.
  • the first membrane treatment unit 111 includes at least one membrane separation unit. The number of membrane separation parts can be changed as appropriate.
  • the second membrane treatment unit 112 converts the first concentrated water W 14B and the second concentrated water W 15B and W 16B into the second permeated water W 15A to the second permeated water W 17A and the second concentrated water W 15B to the second concentrated water.
  • a plurality of (three in the present embodiment) membrane separation units having a second separation membrane 112a that performs membrane separation into W 17B a first membrane separation unit 112-1 to a third membrane separation unit 112-3.
  • the second membrane treatment unit 112 includes a first membrane separation unit 112-1 to which the first concentrated water W 14B is supplied, and a second membrane separation unit 112-2 provided at the subsequent stage of the first membrane separation unit 112-1. And a third membrane separation unit 112-3 provided at the subsequent stage of the second membrane separation unit 112-2.
  • the 2nd separation membrane 112a As the 2nd separation membrane 112a, the thing similar to 1 A of water treatment apparatuses which concern on 1st Embodiment mentioned above can be used. In the present embodiment, an example in which three membrane separation units 112-1 to 112-3 are provided will be described. However, the second membrane processing unit 112 may include at least one membrane separation unit, and the membrane The number of separation parts can be changed as appropriate.
  • the first membrane separation unit 111-1 for example, membrane separation treatment water W 1 supplied from the flue gas desulfurization unit into a first permeate W 11A in the first concentrated water W 11B. Further, the first membrane separation unit 111-1 discharges the first permeate W 11A obtained by membrane separation via the permeate discharge line L 11A to the outside of the water treatment device 4A, and also supplies the concentrated water supply line L The first concentrated water W 11B is supplied to the second membrane separation unit 111-2 through 11B .
  • the second membrane separation unit 111-2 membrane-separates the first concentrated water W 11B supplied from the first membrane separation unit 111-1 into a first permeated water W 12A and a first concentrated water W 12B .
  • the second membrane separation unit 111-2 discharges the first permeated water W 12A obtained by membrane separation through the permeated water discharge line L 12A to the outside of the water treatment device 4A, and also supplies the concentrated water supply line L
  • the first concentrated water W 12B is supplied to the third membrane separation unit 111-3 through 12B .
  • the third membrane separation unit 111-3 membrane separates the first concentrated water W 12B supplied from the second membrane separation unit 111-2 into a first permeate W 13A in the first concentrated water W 13B.
  • the third membrane separation unit 111-3 discharges the first permeated water W 13A obtained by membrane separation through the permeated water discharge line L 13A to the outside of the water treatment device 4A, and also supplies the concentrated water supply line L
  • the first concentrated water W 13B is supplied to the fourth membrane separation unit 111-4 through 13B .
  • the fourth membrane separation unit 111-4 membrane-separates the first concentrated water W 13B supplied from the third membrane separation unit 111-3 into the first permeated water W 14A and the first concentrated water W 14B . Further, the fourth membrane separation unit 111-4 discharges the first permeated water W 14A obtained by membrane separation through the permeated water discharge line L 14A to the outside of the water treatment device 4A, and also supplies the concentrated water supply line L The first concentrated water W 14B is supplied to the first membrane separation unit 112-1 of the second membrane processing unit 112 via 14B .
  • the first membrane treatment unit 111 includes a plurality of first membrane separation units 111-1 to 111-4 including the first separation membrane 111a arranged in series.
  • the first membrane treatment unit 111 converts the treated water W 1 into the first permeated water W 11A to W 14A and the treated water W 1 from the first membrane separation unit 111-1 to the fourth membrane separation unit 111-. 4 is separated into the first concentrated water W 11B to W 14B that are sequentially concentrated by 4, and the first permeated water W 11A to W 14A is discharged to the outside of the water treatment device 4A and the concentrated first concentrated water W 14B can be supplied to the second film processing unit 112.
  • the first membrane separation unit 112-1 membrane-separates the first concentrated water W 14B supplied from the fourth membrane separation unit 111-4 into the second permeated water W 15A and the second concentrated water W 15B . Further, the first membrane separation unit 112-1 uses the second permeated water W 15A obtained by membrane separation via the permeated water supply line L 15A as the treated water W 1 supplied to the first membrane treatment unit 111. At the same time, the second concentrated water W 15B is supplied to the second membrane separation unit 112-2 through the concentrated water supply line L 15B .
  • the second membrane separation unit 112-2 membrane-separates the second concentrated water W 15B supplied from the first membrane separation unit 112-1 into a second permeated water W 16A and a second concentrated water W 16B .
  • the second membrane separation unit 112-2 uses the second permeated water W 16A obtained by membrane separation via the permeated water supply line L 16A as the treated water W 1 supplied to the first membrane treatment unit 111.
  • the second concentrated water W 16B is supplied to the third membrane separation unit 112-3 via the concentrated water supply line L 16B .
  • the third membrane separation unit 112-3 membrane-separates the second concentrated water W 16B supplied from the second membrane separation unit 112-2 into a second permeated water W 17A and a second concentrated water W 17B . Further, the third membrane separation unit 112-3 supplies the second permeated water W 17A obtained by membrane separation via the permeated water supply line L 17A to the treated water W 1 supplied to the first membrane treatment unit 111. supplies, the second concentrated water W 17B is discharged to the outside of the water treatment device 4A through the concentrated water discharge line L 17B.
  • the second membrane treatment unit 112 the plurality of first membrane separation units 112-1 to 112-3 including the second separation membrane 112a are arranged in series.
  • the second membrane treatment unit 112 is configured such that the second permeated water W 15A to W 17A and the second concentrated water W 15B are sequentially concentrated from the first concentrated water W 14B supplied from the first membrane treatment unit 111. 2
  • the membrane was separated into concentrated water W 15B to W 17B, and the second permeated water W 15A to W 17A was supplied to the water to be treated W 1 supplied to the first membrane treatment unit 111 and concentrated to a high concentration.
  • the second concentrated water W 17B can be discharged to the outside of the water treatment device 4A.
  • the second separation membrane 112a having a relatively low desalting rate relative to the first separation membrane 111a is used for the first membrane separation unit 112-1 to the third membrane separation unit 112-3.
  • the permeated water osmotic pressure can be increased on the second permeated water W 15A to W 17A side.
  • Pretreated water as water to be treated W 1 is supplied to the membrane separation module 11 through the treated water supply line L 1.
  • the treated water W 1 supplied to the membrane separation module 11 is converted into a first permeated water W 11A and a first concentrated water W 11B by membrane separation by the first membrane separation unit 111-1 of the first membrane treatment unit 111.
  • the first permeated water W 11A membrane-separated by the first membrane separation unit 111-1 is discharged to the outside of the water treatment device 4A through the permeated water discharge line L 11A .
  • the first concentrated water W 11B membrane-separated by the first membrane separation unit 111-1 is subjected to membrane separation by the second membrane separation unit 111-1 to the fourth membrane separation unit 111-4 and the first permeated water W 12A to W
  • the membrane is separated into 14A and first concentrated waters W 12B to W 14B .
  • the first permeated water W 12A to W 14A membrane-separated by the second membrane separating unit 111-2 to the fourth membrane separating unit 111-4 is passed through the permeated water discharge lines L 12A to L 14A . It is discharged outside.
  • the first concentrated water W 14B sequentially concentrated by the first membrane separation unit 111-1 to the fourth membrane separation unit 111-4 is supplied to the first membrane separation unit 112-1 of the second membrane treatment unit 112.
  • the first concentrated water W 14B supplied to the first membrane separation unit 112-1 is membrane-separated into the second permeated water W 15A and the second concentrated water W 15B by membrane separation by the first membrane separation unit 112-1.
  • the second permeated water W 15A membrane-separated by the first membrane separation unit 112-1 is supplied to the treated water W 1 supplied to the first membrane processing unit 111 via the permeated water supply line L 15A .
  • the second concentrated water W 15B membrane-separated by the first membrane separation unit 112-1 is converted into the second permeated water W 16A , W by membrane separation by the second membrane separation unit 112-2 and the third membrane separation unit 112-3.
  • the membrane is separated into 17A and second concentrated water W 16B and W 17B .
  • the second permeated water W 16A and W 17A membrane-separated by the second membrane separation unit 112-2 and the third membrane separation unit 112-3 are passed through the permeated water supply lines L 16A and L 17A. Supplied to the treated water W 1 supplied to 111.
  • the high-concentration second concentrated water W 17B which is successively concentrated by membrane separation by the second membrane separation unit 112-2 and the third membrane separation unit 112-3, is supplied to the water treatment device 4A via the concentrated water discharge line L 17B . It is discharged outside.
  • the first concentrated water W 14B which are membrane separation in the first separation film 111a first separation film 111a relatively more salt rejection is lower second separation films 112a Therefore, the permeated water osmotic pressure on the second permeated water W 15A to W 17A side is increased.
  • the water treatment device 4A as compared with the case of sequentially concentrating treatment water W 1 in the second separation film 112a without using the second separation film 112a, concentrating water to be treated W 1 at a high concentration It becomes possible.
  • the water treatment device 4A second permeate W 15A which may contain membrane separated impurities in the second separation membrane 112a, since then supplied to the first separation film 111a to W 16A again membrane separation, high purity
  • the first permeated water W 11A to W 14A can be taken out of the water treatment apparatus 4A. Therefore, the water that can be highly concentrated in which the total dissolved solids (TDS: Total Dissolved Solids) of the second concentrated water W 15B to W 17B after membrane separation of the water to be treated W 1 is, for example, 80,000 mg / L or more.
  • TDS Total Dissolved Solids
  • the processing device 4A can be realized.
  • FIG. 4B is a schematic diagram illustrating another example of the water treatment device according to the third embodiment.
  • Water treatment apparatus 4B shown in FIG. 4B in addition to the configuration of the water treatment apparatus 4A shown in FIG. 4A, is branched from the permeate discharge line L 11A, connected to permeate supply line to the water to be treated supply line L 1 L 14c and a permeate discharge line L 17c branched from the permeate supply line L 17A .
  • the permeated water supply line L 14C supplies the first permeated water W 11A to W 14A membrane-separated by the first membrane treatment unit 111 to the treated water W 1 as the first permeated water W 14C , and the permeated water discharge line L 17c discharges the second permeate W 17A which are membrane separation in the second film processing 112 to the outside of the water treatment device 4B as a second permeate W 17C. That is, in the water treatment apparatus 4B, the first membrane treatment unit 111 discharges at least a part of the first permeate water W 11A to W 14A to the outside of the first membrane treatment unit 111 and the first permeate water W 11A.
  • the second membrane treatment unit 112 supplies at least a part of the second permeated water W 17A to the treated water W 1 supplied to the first membrane treatment unit 111 and at least one of the second permeated water W 17A .
  • the portion can be discharged to the outside of the water treatment device 4B as the second permeated water W17C .
  • the permeated water supply line L 14C is provided with a flow rate control valve V 14C for controlling the flow rate of the first permeated water W 14C flowing through the permeated water supply line L 14C .
  • the permeated water discharge line L 17C is provided with a permeated water discharge line.
  • a flow rate control valve V 17C for controlling the flow rate of the second permeated water W 17C flowing through L 17C is provided.
  • the permeate supply line L 17A, the flow control valve V 17A for controlling the flow rate of the second permeate W 17A through the permeate supply line L 17A is provided.
  • a flow rate control for controlling the flow rates of the first permeate water W 11A to W 14A flowing through the permeate discharge line L 11A on the downstream side of the branch portion of the permeate discharge line L 11A with the permeate supply line L 14C.
  • a valve V14A is provided.
  • the opening degree of the flow rate control valves V 14A , V 14C , V 17A , V 17C is controlled by the control unit 20.
  • the control unit 20 changes the opening degree of the flow control valves V 14A , V 14C , V 17A , V 17C , and thereby the first permeation discharged from the first film processing unit 111 to the outside of the first film processing unit 111.
  • the amount of water W 11A to W 14A, the amount of first permeated water W 11A to W 14C supplied to the water to be treated W 1 supplied to the first membrane treatment unit 111, and the second membrane treatment unit 112 to controlling the amount of water of the second permeate W 17C is discharged to the outside of the water and the water treatment device 4B of the second permeate W 17A to be supplied to the water to be treated W 1 supplied to the first-layer processing unit 111.
  • the first permeated water W 14C is supplied again to the first separation membrane 111a for membrane separation, so even if there is a large amount of impurities in the water to be treated W 1 , the high-purity first permeated water W 11A to W 14A can be taken out of the water treatment device 4B.
  • Membrane separation module 111 First membrane treatment section 111a First separation membrane 111-1 First membrane separation section 111-2 Second membrane separation section 111 -3 Third membrane separation unit 111-4 Fourth membrane separation unit 112 Second membrane treatment unit 112a Second separation membrane 112-1 First membrane separation unit 112-2 Second membrane separation unit 112-3 Third membrane separation unit 12 FGD unit 13 reverse osmosis membrane filtration unit 13a reverse osmosis membrane 14 evaporator unit 15 the post-processing section 20 control section W 1 water to be treated W 2, W 11A, W 12A , W 13A, W 14A, W 14C first permeate W 11B, W 12B, W 13B , W 14B first concentrated water W 3, W 15A, W 16A , W 17A, W 17C second permeate W 4, W 15B, W 16B , W 17B second concentrated water W 5 seawater W 6 permeated water W 7 post-treatment water L 1 treated water supply line L

Abstract

La présente invention concerne un dispositif 1A de traitement d'eau doté : d'une première section 111 de traitement par membrane pourvue d'une pluralité de sections de séparation à membrane comprenant chacune une première membrane de séparation 111a permettant de réaliser une séparation par membrane de l'eau à traiter W1 en une première eau de perméat W2 et une première eau concentrée ; et une seconde section 112 de traitement par membrane pourvue d'une pluralité de sections de séparation par membrane comprenant chacune une seconde membrane de séparation 112a ayant un taux de dessalement inférieur à celui des premières membranes de séparation 111a et qui réalise une séparation par membrane de la première eau concentrée en une seconde eau de perméat W3 et une seconde eau concentrée W4. La première section 111 de traitement par membrane décharge au moins une partie de la première eau de perméat W2 vers l'extérieur de la première section 111 de traitement par membrane et fournit la première eau concentrée soumise à une séparation par membrane à partir de l'eau à traiter W1 vers la seconde section 112 de traitement par membrane 112. La seconde section 112 de traitement par membrane fournit au moins une partie de la seconde eau de perméat W3 à l'eau à traiter W1 fournie à la première section 111 de traitement par membrane et évacue la seconde eau concentrée W4 soumise à une séparation par membrane à partir de la première eau concentrée.
PCT/JP2018/010872 2018-03-19 2018-03-19 Dispositif de traitement d'eau et procédé de traitement d'eau WO2019180789A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/010872 WO2019180789A1 (fr) 2018-03-19 2018-03-19 Dispositif de traitement d'eau et procédé de traitement d'eau

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2018/010872 WO2019180789A1 (fr) 2018-03-19 2018-03-19 Dispositif de traitement d'eau et procédé de traitement d'eau

Publications (1)

Publication Number Publication Date
WO2019180789A1 true WO2019180789A1 (fr) 2019-09-26

Family

ID=67988405

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/010872 WO2019180789A1 (fr) 2018-03-19 2018-03-19 Dispositif de traitement d'eau et procédé de traitement d'eau

Country Status (1)

Country Link
WO (1) WO2019180789A1 (fr)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53102271A (en) * 1977-02-17 1978-09-06 Ebara Infilco Co Ltd Treating method for waste fluid from desulfurization of flue gas
JPH0461983A (ja) * 1990-06-25 1992-02-27 Kawasaki Heavy Ind Ltd 含塩分水の処理方法及び装置
JPH1085742A (ja) * 1996-09-12 1998-04-07 Kawasaki Heavy Ind Ltd 脱硫排水の処理方法及び装置
JPH10137540A (ja) * 1996-11-13 1998-05-26 Mitsui Mining Co Ltd 排煙脱硫装置からの排水処理方法
JP2009285565A (ja) * 2008-05-29 2009-12-10 Miura Co Ltd 水処理装置
JP2011189302A (ja) * 2010-03-16 2011-09-29 Miura Co Ltd 純水製造システム
JP2011224465A (ja) * 2010-04-20 2011-11-10 Miura Co Ltd 純水製造システム
JP2012076073A (ja) * 2010-09-06 2012-04-19 Hitachi Plant Technologies Ltd 水処理装置
JP2014161794A (ja) * 2013-02-25 2014-09-08 Mitsubishi Heavy Ind Ltd 水処理システム及び海水からの有価物製造方法
JP2015029931A (ja) * 2013-07-31 2015-02-16 三菱重工業株式会社 淡水化装置及び淡水化方法、並びに淡水の製造方法、淡水、塩及び有価物の併産方法
JP2015139750A (ja) * 2014-01-29 2015-08-03 株式会社ウェルシィ 逆浸透膜装置及びその運転方法
WO2016111370A1 (fr) * 2015-01-09 2016-07-14 東レ株式会社 Procédé de traitement d'eau
JP2018503514A (ja) * 2015-02-02 2018-02-08 サリー・アクアテクノロジー・リミテッド 塩水濃縮

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53102271A (en) * 1977-02-17 1978-09-06 Ebara Infilco Co Ltd Treating method for waste fluid from desulfurization of flue gas
JPH0461983A (ja) * 1990-06-25 1992-02-27 Kawasaki Heavy Ind Ltd 含塩分水の処理方法及び装置
JPH1085742A (ja) * 1996-09-12 1998-04-07 Kawasaki Heavy Ind Ltd 脱硫排水の処理方法及び装置
JPH10137540A (ja) * 1996-11-13 1998-05-26 Mitsui Mining Co Ltd 排煙脱硫装置からの排水処理方法
JP2009285565A (ja) * 2008-05-29 2009-12-10 Miura Co Ltd 水処理装置
JP2011189302A (ja) * 2010-03-16 2011-09-29 Miura Co Ltd 純水製造システム
JP2011224465A (ja) * 2010-04-20 2011-11-10 Miura Co Ltd 純水製造システム
JP2012076073A (ja) * 2010-09-06 2012-04-19 Hitachi Plant Technologies Ltd 水処理装置
JP2014161794A (ja) * 2013-02-25 2014-09-08 Mitsubishi Heavy Ind Ltd 水処理システム及び海水からの有価物製造方法
JP2015029931A (ja) * 2013-07-31 2015-02-16 三菱重工業株式会社 淡水化装置及び淡水化方法、並びに淡水の製造方法、淡水、塩及び有価物の併産方法
JP2015139750A (ja) * 2014-01-29 2015-08-03 株式会社ウェルシィ 逆浸透膜装置及びその運転方法
WO2016111370A1 (fr) * 2015-01-09 2016-07-14 東レ株式会社 Procédé de traitement d'eau
JP2018503514A (ja) * 2015-02-02 2018-02-08 サリー・アクアテクノロジー・リミテッド 塩水濃縮

Similar Documents

Publication Publication Date Title
US9206060B1 (en) Method for purifying liquids
US7097769B2 (en) Method of boron removal in presence of magnesium ions
US7083730B2 (en) Production of purified water and high value chemicals from salt water
TWI570064B (zh) 海水脫鹽方法
AU2008366066B2 (en) Methods and systems for processing waste water
US8647509B2 (en) Seawater desalination plant and production of high purity salt
US20110180479A1 (en) Zero liquid discharge water treatment system and method
CN114096342A (zh) 脱盐盐水浓缩系统及方法
WO2010135561A2 (fr) Procédé de traitement et de purification de l'eau de mer pour récupérer du chlorure de sodium de grande pureté pour un usage industriel
CN111362283A (zh) 一种黏胶废水资源化处理方法
WO2019180789A1 (fr) Dispositif de traitement d'eau et procédé de traitement d'eau
WO2020223829A1 (fr) Procédé de récupération d'eau et de produits chimiques à partir d'installations de traitement d'effluents d'usines de pâte et papier
JP2018108551A (ja) 水処理装置及び水処理方法
WO2018124289A1 (fr) Appareil de traitement de gaz d'échappement et procédé de traitement de gaz d'échappement
JP7377000B2 (ja) 水処理システムおよび水処理方法
CN115504615B (zh) 一种针对高含盐废水的盐转化零排系统
JP2023127832A (ja) 浸透圧発電システム
JPS60172393A (ja) 多段蒸発−逆浸透複合海水淡水化装置
JPH04244288A (ja) 超純水製造システム
WO2022187252A1 (fr) Systèmes et procédés pour réduire le magnésium, le calcium et/ou le sulfate de saumure de chlorure de sodium pendant la concentration par nanofiltration haute pression
PL241837B1 (pl) Sposób wstępnego oczyszczania wody zasolonej do odsalania i zatężania oraz hybrydowy system membranowo-krystalizacyjny do realizacji sposobu
WO2020003148A2 (fr) Processus d'osmose inverse
KR20210026532A (ko) 폐액 농축이 가능한 담수화 장치
PL241836B1 (pl) Sposób wstępnego oczyszczania wody zasolonej do odsalania i zatężania oraz hybrydowy system membranowy do realizacji sposobu
US20040226872A1 (en) Apparatus for the purification of water

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18910707

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18910707

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP