+

WO2016167267A1 - Membrane semi-perméable du type à fibres creuses, module de membrane à fibres creuses et procédé de traitement d'eau par osmose directe - Google Patents

Membrane semi-perméable du type à fibres creuses, module de membrane à fibres creuses et procédé de traitement d'eau par osmose directe Download PDF

Info

Publication number
WO2016167267A1
WO2016167267A1 PCT/JP2016/061873 JP2016061873W WO2016167267A1 WO 2016167267 A1 WO2016167267 A1 WO 2016167267A1 JP 2016061873 W JP2016061873 W JP 2016061873W WO 2016167267 A1 WO2016167267 A1 WO 2016167267A1
Authority
WO
WIPO (PCT)
Prior art keywords
hollow fiber
semipermeable membrane
fiber type
type semipermeable
water
Prior art date
Application number
PCT/JP2016/061873
Other languages
English (en)
Japanese (ja)
Inventor
昌平 合田
忍 時見
櫻井　秀彦
Original Assignee
東洋紡株式会社
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 東洋紡株式会社 filed Critical 東洋紡株式会社
Priority to JP2017512548A priority Critical patent/JP6743810B2/ja
Publication of WO2016167267A1 publication Critical patent/WO2016167267A1/fr

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/02—Hollow fibre modules
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/08—Hollow fibre membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/08—Polysaccharides
    • B01D71/10—Cellulose; Modified cellulose
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/08—Polysaccharides
    • B01D71/12—Cellulose derivatives
    • B01D71/14—Esters of organic acids
    • B01D71/16—Cellulose acetate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/56—Polyamides, e.g. polyester-amides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/66—Polymers having sulfur in the main chain, with or without nitrogen, oxygen or carbon only
    • B01D71/68—Polysulfones; Polyethersulfones
    • 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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
    • D01F2/24—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives
    • D01F2/28—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from cellulose derivatives from organic cellulose esters or ethers, e.g. cellulose acetate
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof

Definitions

  • the present invention relates to a hollow fiber type semipermeable membrane, a hollow fiber membrane module including the hollow fiber type semipermeable membrane, and a forward osmosis water treatment method using the hollow fiber type semipermeable membrane.
  • Forward osmosis is a solution with high concentration (high osmotic pressure) in the low concentration (low osmotic pressure) treated water (feed solution) side through a semipermeable membrane (draw solution) It is a phenomenon that moves toward.
  • a water treatment method using a reverse osmosis (RO) process is conventionally known.
  • the reverse osmosis step is a step of moving water from a high concentration treatment target water to a low concentration solution side by applying artificially strong pressure, contrary to normal osmosis.
  • Patent Document 1 discloses a forward osmosis water treatment system using a hollow fiber type semipermeable membrane.
  • Patent Document 2 JP-A-2014-512951 discloses a polyglycol copolymer as a draw solution. It is disclosed to use a high viscosity solution.
  • the present invention provides a hollow fiber type semipermeable membrane capable of suppressing a decrease in the efficiency of forward osmosis water treatment even when a high-viscosity draw solution is allowed to flow through the hollow portion of the hollow fiber type semipermeable membrane.
  • An object of the present invention is to provide a hollow fiber membrane module and a forward osmosis water treatment method.
  • a hollow fiber type semipermeable membrane characterized by having an inner diameter of more than 250 ⁇ m and not more than 700 ⁇ m.
  • the hollow fiber type semipermeable membrane according to [1] which is made of a material containing at least one of a cellulose resin, a polysulfone resin, and a polyamide resin.
  • a hollow fiber membrane module comprising the hollow fiber type semipermeable membrane according to any one of [1] to [4].
  • the hollow fiber type semipermeable membrane and hollow fiber membrane module which can suppress that the efficiency of forward osmosis water treatment falls. And a forward osmosis water treatment method can be provided.
  • 6 is a graph showing the relationship between the amount of water produced and the inner diameter of a hollow fiber type semipermeable membrane when the viscosity ⁇ of the draw solution is 0.3 Pa ⁇ s (corresponding to Table 5).
  • the viscosity ⁇ of the draw solution is 0.126, 0.239, 0.330, 0.600 Pa ⁇ s (corresponding to Tables 3, 4, 6, 7)
  • the amount of water produced and the inner diameter of the hollow fiber type semipermeable membrane It is a graph which shows the relationship.
  • 6 is a graph showing the relationship between the amount of water produced and the inner diameter of a hollow fiber type semipermeable membrane when the viscosity ⁇ of the draw solution is 0.600 Pa ⁇ s (corresponding to Table 7).
  • the hollow fiber type semipermeable membrane of the present invention has an inner diameter of more than 250 ⁇ m and 700 ⁇ m or less.
  • the inner diameter is preferably more than 250 ⁇ m and not more than 650 ⁇ m, more preferably more than 250 ⁇ m and not more than 600 ⁇ m, and still more preferably not more than 500 ⁇ m.
  • the pressure loss due to the hollow fiber type semipermeable membrane is reduced by setting the inner diameter of the hollow fiber type semipermeable membrane to be in the range of more than 250 ⁇ m to 700 ⁇ m or less, the flow rate of the draw solution flowing in the hollow portion Can be more.
  • the flow rate of the draw solution flowing in the hollow portion Can be more.
  • the material constituting the hollow fiber type semipermeable membrane is not particularly limited, and examples thereof include cellulose resins, polysulfone resins, and polyamide resins.
  • the hollow fiber type semipermeable membrane is preferably composed of a material containing at least one of a cellulose resin and a polysulfone resin.
  • the cellulose resin is preferably a cellulose acetate resin.
  • Cellulose acetate resin is resistant to chlorine, which is a bactericidal agent, and has a feature that it can suppress the growth of microorganisms.
  • the cellulose acetate resin is preferably cellulose acetate, and more preferably cellulose triacetate from the viewpoint of durability.
  • the polysulfone resin is preferably a polyethersulfone resin.
  • the polyethersulfone resin is preferably a sulfonated polyethersulfone.
  • a membrane having a single layer structure which is entirely made of a cellulose-based resin there is a membrane having a single layer structure which is entirely made of a cellulose-based resin.
  • the single-layer structure here does not need to be a uniform film as a whole, for example, as disclosed in Patent Document 1, a dense layer is provided in the vicinity of the outer peripheral surface, and this dense layer is substantially In particular, it is preferably a separation active layer that defines the pore diameter of the hollow fiber type semipermeable membrane.
  • a specific hollow fiber type semipermeable membrane 2 having a dense layer made of a polyphenylene resin (for example, sulfonated polyethersulfone) on the outer peripheral surface of a support layer (for example, a layer made of polyphenylene oxide)
  • a film having a layer structure may be mentioned.
  • Another example includes a two-layered film having a dense layer made of a polyamide resin on the outer peripheral surface of a support layer (for example, a layer made of polysulfone or polyethersulfone).
  • the thickness of the dense layer is preferably 0.1 to 7 ⁇ m. It is preferable that the dense layer has a small thickness because water permeability resistance is small. For this reason, the thickness of the dense layer is more preferably 6 ⁇ m or less, and further preferably 5 ⁇ m or less. However, if the dense layer is too thin, potential defects in the membrane structure are likely to be manifested, and for example, it becomes difficult to suppress leakage of monovalent ions, or the durability of the membrane is reduced. Problems are likely to occur. For this reason, the thickness of the dense layer is more preferably 0.5 ⁇ m or more, and further preferably 1 ⁇ m or more.
  • the outer diameter of the hollow fiber type semipermeable membrane is preferably 300 to 1000 ⁇ m, more preferably 400 to 950 ⁇ m.
  • the total thickness of the hollow fiber type semipermeable membrane is preferably 50 to 200 ⁇ m, more preferably 60 to 170 ⁇ m.
  • the film thickness can be calculated by (outer diameter ⁇ inner diameter) / 2.
  • the hollow ratio [(inner diameter / outer diameter) 2 ⁇ 100 (%)] of the hollow fiber type semipermeable membrane is preferably 30 to 60%, more preferably 35 to 55%.
  • a hollow rate is a ratio of the area of the hollow part in the cross section of a hollow fiber type semipermeable membrane.
  • the length of the hollow fiber type semipermeable membrane is not particularly limited, but is preferably 15 to 400 cm, more preferably 20 to 350 cm.
  • the hollow fiber type semipermeable membrane preferably has a pore diameter of 100 nm or less.
  • a hollow fiber type semipermeable membrane for example, reverse osmosis membrane (RO membrane: Reverse Osmosis membrane), forward osmosis membrane (FO membrane: forward osmosis membrane), nanofiltration membrane (NF membrane: nanofiltration membrane), limited What is called an outer filtration membrane (UF membrane: Ultrafiltration Membrane) is mentioned.
  • the pore size of the RO membrane and the FO membrane is about 2 nm or less, and the pore size of the UF membrane is about 2 to 100 nm.
  • the NF membrane has a relatively low blocking rate of ions and salts among the RO membrane, and the pore size of the NF membrane is usually about 1 to 2 nm.
  • this invention relates also to the hollow fiber membrane module provided with said hollow fiber type semipermeable membrane.
  • a method for incorporating the hollow fiber type semipermeable membrane into the hollow fiber type semipermeable membrane module there are conventionally known methods.
  • Japanese Patent No. 441486, Japanese Patent No. 4277147, Japanese Patent No. 3591618, Japanese Patent No. 3008886, etc. are listed.
  • 45 to 90 hollow fiber type semipermeable membranes are collected to form one hollow fiber type semipermeable membrane assembly, and a plurality of the hollow fiber type semipermeable membrane assemblies are arranged side by side to form a flat hollow shape.
  • a thread-type semipermeable membrane bundle As a thread-type semipermeable membrane bundle, it is wound while traversing a core tube having a large number of holes. At this time, the winding angle is set to 5 to 60 degrees, and the winding body is wound up so that an intersecting portion is formed on the circumferential surface at a specific position. Next, after bonding both ends of the wound body, only one side or both sides are cut to form a hollow fiber opening to form a hollow fiber type separation membrane element. The obtained hollow fiber type separation membrane element 1 is inserted into the pressure vessel 2 to assemble the hollow fiber type semipermeable membrane module 3 (FIG. 5).
  • the present invention also relates to a forward osmosis water treatment method using the hollow fiber type semipermeable membrane.
  • the forward osmosis water treatment method of the present invention is a method of separating and collecting water from the water to be treated by forward osmosis using the hollow fiber type semipermeable membrane.
  • the water to be treated is a liquid containing water and components other than water.
  • water to be treated examples include seawater, river water, lake water, and industrial wastewater.
  • the treatment target water is a solution having a high salt concentration such as seawater
  • the evaporation residue concentration (TDS) of the treatment target water is preferably 0.7 to 14% by mass, more preferably 1.5 to It is 10% by mass, and more preferably 3 to 8% by mass.
  • the water to be treated liquid containing water and a component other than water
  • the hollow fiber type semipermeable membrane is placed in the hollow portion.
  • a draw solution (DS) containing a draw solute By flowing a draw solution (DS) containing a draw solute, a permeation (forward osmosis) step of moving (permeating, permeating) the water contained in the water to be treated from the outer peripheral surface side into the hollow portion through the hollow fiber type semipermeable membrane.
  • said hollow fiber type semipermeable membrane module can be used suitably for the forward osmosis water processing method of this invention.
  • the treatment target water can be brought into contact with the outer peripheral surface of the hollow fiber type semipermeable membrane by flowing the treatment target water outside the hollow fiber type semipermeable membrane in the hollow fiber membrane module as described above. it can.
  • the viscosity of the draw solution is preferably 0.15 Pa ⁇ s or more, more preferably 0.20 Pa ⁇ s or more.
  • the hollow fiber type semipermeable membrane of the present invention is useful because the efficiency of the forward osmosis treatment is particularly likely to decrease.
  • the osmotic pressure of the draw solution is preferably 0.5 to 10 MPa, more preferably 1 to 7 MPa, and further preferably 2 to 6 MPa, although it depends on the molecular weight of the solute.
  • Examples of the draw solute include saccharides, proteins, and synthetic polymers. Stimulus-responsive polymers are preferable from the viewpoint of easy recovery and regeneration.
  • Examples of the stimulus responsive polymer include a temperature responsive polymer, a pH responsive polymer, a photoresponsive polymer, and a magnetic responsive polymer.
  • the temperature-responsive polymer is a polymer having a characteristic (temperature responsiveness) in which hydrophilicity changes with a predetermined temperature as a critical point.
  • the temperature responsiveness is a characteristic that becomes hydrophilic or hydrophobic depending on the temperature.
  • the change in hydrophilicity is preferably reversible.
  • the temperature-responsive polymer can be dissolved in water or phase-separated from water by adjusting the temperature.
  • the temperature-responsive polymer is a polymer composed of a plurality of structural units derived from a monomer, and preferably has a hydrophilic group in the side chain.
  • LCST lower critical solution temperature
  • UCST upper critical solution temperature
  • the semi-permeable membrane is in contact with the semi-permeable membrane by a temperature-responsive polymer dissolved in low-temperature water.
  • the conducting polymer is preferably LCST type.
  • a UCST type can be used in addition to the LCST type.
  • hydrophilic group examples include a hydroxyl group, a carboxyl group, an acetyl group, an aldehyde group, an ether bond, and an ester bond.
  • the hydrophilic group is preferably at least one selected from these.
  • the temperature-responsive polymer preferably has at least one hydrophilic group in at least some or all of the structural units. Moreover, the temperature-responsive polymer may have a hydrophobic group in some structural units while having a hydrophilic group. In addition, it is considered that the balance between the hydrophilic group and the hydrophobic group contained in the molecule is important for the temperature responsive polymer to have temperature responsiveness.
  • Specific temperature-responsive polymers include, for example, polyvinyl ether polymers, polyvinyl acetate polymers, (meth) acrylic acid polymers, and the like.
  • the hollow fiber type semipermeable membrane When the hollow fiber type semipermeable membrane is used as the forward osmosis membrane as in the forward osmosis water treatment method of the present invention, the hollow fiber type from the viewpoint that the pressure resistance of the hollow fiber type semipermeable membrane or the high pressure pump is not required.
  • the pressure of the fluid flowing in the hollow part of the semipermeable membrane is desirably 0.2 MPa or less. Therefore, in the infiltration step, the pressure for flowing the draw solution is preferably 0.2 MPa or less, more preferably 0.15 MPa or less.
  • the pressure for flowing the draw solution is preferably 0.01 MPa or more, more preferably Is 0.05 MPa or more.
  • the forward osmosis water treatment method of the present invention preferably further includes a separation step for separating the draw solute contained in the draw solution from the water after the infiltration step.
  • the draw solute when the draw solute is a temperature-responsive polymer, the draw solution is contained in the draw solution by flowing into the chamber separate from the hollow fiber membrane module and changing the temperature of the draw solution in the chamber.
  • the draw solute can be separated from the water.
  • the draw solute temperature-responsive polymer
  • the draw solute after collection can be easily reused (re-dissolved in a draw solution or the like).
  • the forward osmosis water treatment method of the present invention preferably further includes a recovery step of recovering the draw solute separated from the water.
  • the draw solute can be collected using, for example, a membrane separator, a centrifugal separator, a sedimentation separator, or the like.
  • the drawing process for drawing solutes may be repeated in multiple stages so that pure water is obtained. After the drawing process for drawing solutes, a process for further improving the quality of the obtained water may be performed.
  • the forward osmosis water treatment method of the present invention may further include a reuse step in which the draw solute recovered in the recovery step is re-dissolved in the draw solution.
  • the solution was discharged from a three-part nozzle, immersed in a coagulation liquid cooled to 4 to 6 ° C. through an aerial running section, and a hollow fiber type semipermeable membrane was obtained.
  • the obtained hollow fiber type semipermeable membrane was washed with water and then heat-treated at 75 to 85 ° C. for 30 minutes.
  • a 70% by mass NMP aqueous solution is extruded and molded as an inner liquid simultaneously from a double cylindrical tube nozzle while being extruded in a hollow shape.
  • the substrate was immersed in a coagulation bath at 40 ° C. filled with a 35 mass% NMP aqueous solution to produce a PPE porous support membrane, and then washed with water.
  • the porous support membrane that had been subjected to the water washing treatment was immersed in a 50% by mass glycerin aqueous solution, dried at 40 ° C., and wound around a winder.
  • the obtained polymer was washed 6 times with normal temperature water and vacuum dried at 110 ° C. to obtain a sulfonated polyarylene ether (hereinafter abbreviated as SPAE).
  • SPAE sulfonated polyarylene ether
  • Dimethyl sulfoxide solvent was added to the obtained SPAE and dissolved while stirring at room temperature to obtain a coating solution having a concentration of 3% by mass. After passing the PPE porous support membrane through the coating solution, it was dried at 115 ° C. and wound around a winder.
  • Examples 1 to 4 and Comparative Examples 1 and 2 As Examples 1 to 4 and Comparative Examples 1 and 2, six types of hollow fiber membrane modules (virtual modules) having different inner diameters filled with the hollow fiber type semipermeable membrane described in Production Example 1 were assumed.
  • the hollow fiber type semipermeable membrane is classified as a FO membrane having a dense layer thickness of about 2 ⁇ m, a pressure differential water permeability of 150 (L / m 2 / day), and a pressure differential salt removal rate of 99.6%. used.
  • the pressure differential water permeability and the pressure differential salt removal rate are parameters of a hollow fiber type semipermeable membrane measured as follows, for example.
  • thermosetting resin was poured into the sleeve, cured and sealed.
  • an opening surface of the hollow fiber type semipermeable membrane is obtained, and the membrane area on the basis of the outer diameter is about 0.1 m 2
  • a module was produced. This evaluation module was connected to a membrane performance testing device consisting of a feed water tank and a pump, and the performance was evaluated.
  • a supply aqueous solution having a sodium chloride concentration of 1500 mg / L is filtered from the outside to the inside of the hollow fiber type semipermeable membrane at 25 ° C. and a pressure of 1.5 MPa, and is operated for 1 hour. Thereafter, the permeated water was collected from the opening surface of the hollow fiber type semipermeable membrane, and the permeated water weight was measured with an electronic balance (Shimadzu Corporation LIBBROR EB-3200D).
  • FR pressure differential permeability
  • Pressure differential salt removal rate (1 ⁇ membrane permeated water salt concentration [mg / L] / feed aqueous solution salt concentration [mg / L]) ⁇ 100 It is calculated from.
  • the inner diameter, outer diameter, hollow ratio, membrane area and membrane volume of the hollow fiber type semipermeable membrane were as shown in Table 1. Each parameter was set so that the hollow rate and membrane volume of the hollow fiber type semipermeable membrane were substantially constant.
  • the effective length of the hollow fiber type semipermeable membrane filled in the virtual module was 56 cm
  • the adhesion length was 7 cm
  • the inner diameter of the virtual module was 75 mm.
  • the number (filling number) of hollow fiber type semipermeable membranes filled in the virtual module was set as shown in Table 1 so that the filling rate of the virtual module was 50%.
  • the hollow ratio is (inner diameter / outer diameter) 2 ⁇ 100.
  • the membrane area (outer diameter reference) is outer diameter ⁇ ⁇ ⁇ (effective length) ⁇ number of fillings.
  • the membrane volume is ⁇ (outer diameter / 2) 2 ⁇ (effective length) ⁇ number of fillings ⁇ (inner diameter / 2) 2 ⁇ (effective length) ⁇ number of fillings.
  • the filling rate is [ ⁇ (outer diameter / 2) 2 ⁇ (number of fillings)] / [ ⁇ (module inner diameter / 2) 2 ].
  • Tables 3 to 7 show the calculation results when the concentration of the draw solute (assuming Pluronic 25R2 (made by ADEKA) of the draw solution is 61, 77, 83, 85 or 100 (solute only) mass%.
  • the viscosity of each draw solution is 126, 239, 300, 330, 600 cP (centipoise) [0.126, 0.239, 0.300, 0.330, 0.600 Pa ⁇ s] in the same order as described above. Met.
  • the concentration at the inlet of the hollow portion of the hollow fiber type semipermeable membrane (DS inlet concentration) and the concentration at the outlet (DS outlet concentration), the virtual module (inlet of the hollow portion of the hollow fiber type semipermeable membrane) are as follows: The calculation method was used. In each table, the ratio of the DS inlet flow rate based on the value of Comparative Example 2 is also shown.
  • the amount of water permeating through the hollow fiber type semipermeable membrane in the first section of the virtual module is expressed as A ′ value (cm 3 / Cm 2 / s / (kgf / cm 2 )) (assuming constant value) ⁇ membrane area (cm 2 ) ⁇ 60 ⁇ [effective pressure (hydrostatic pressure) ⁇ effective osmotic pressure] (kgf / cm 2 ) Calculate the outlet concentration and outlet flow rate of DS in the first interval.
  • the final calculation is performed.
  • the DS outlet concentration and DS outlet flow rate of a typical virtual module are calculated.
  • the total amount of water that permeated the hollow fiber type semipermeable membrane in each section is the total amount of water ( ⁇ V) that permeated the hollow fiber type semipermeable membrane in the virtual module, and [DS outlet flow rate ⁇ DS inlet flow rate] ].
  • the A ′ value (water permeability performance) was calculated from the following formula using the film evaluation results (Table 2) using the draw solutions having the viscosities and concentrations shown in Table 2. However, in the calculations shown in Tables 3 to 7, among the three A ′ values shown in Table 2, A ′ values whose viscosities shown in Table 2 were close to those in Tables 3 to 7 were substituted. However, when the viscosity was 0.300 or more, 2.6 ⁇ 10 ⁇ 7 was substituted.
  • FIGS. 1 and 3 shows the case where the viscosity ⁇ of the draw solution is 0.600 Pa ⁇ s (corresponding to Table 7).
  • FIG. 4 shows the calculation results when the draw solution was 7 mass% salt water (viscosity: about 0.1 Pa ⁇ s).
  • a graph of the ratio of the DS inlet flow rate based on Comparative Example 2 is indicated by a dotted line.
  • the inner diameter of the hollow fiber type semipermeable membrane is more than 250 ⁇ m and not more than 700 ⁇ m. It is thought that it is possible to improve the efficiency (water permeability) of forward osmosis water treatment by making it into this range.
  • the draw solution shown in FIG. 3 is low-viscosity salt water. That is, when the viscosity of the draw solution is less than 0.150 Pa ⁇ s, the efficiency of the normal osmotic water treatment (water permeability) is improved by setting the inner diameter of the hollow fiber type semipermeable membrane to be in the range of more than 250 ⁇ m to 700 ⁇ m or less. It is presumed that it is difficult to obtain the effect. Therefore, it is considered that the hollow fiber type semipermeable membrane of the present invention is particularly useful when a solution having a high viscosity of 0.150 Pa ⁇ s or more is used as the draw solution.
  • 1 hollow fiber type separation membrane element 1 pressure vessel, 3 hollow fiber type semipermeable membrane module.

Landscapes

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

Abstract

L'invention concerne une membrane semi-perméable du type à fibres creuses caractérisée en ce que le diamètre interne est supérieur à 250 μm mais inférieur ou égal à 700 μm. Même lorsqu'une solution d'extraction à viscosité élevée s'écoule à travers les parties creuses de la membrane semi-perméable, le déclin de l'efficacité du traitement par osmose directe peut être réduit au minimum.
PCT/JP2016/061873 2015-04-15 2016-04-13 Membrane semi-perméable du type à fibres creuses, module de membrane à fibres creuses et procédé de traitement d'eau par osmose directe WO2016167267A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2017512548A JP6743810B2 (ja) 2015-04-15 2016-04-13 中空糸型半透膜、中空糸膜モジュールおよび正浸透水処理方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015-083201 2015-04-15
JP2015083201 2015-04-15

Publications (1)

Publication Number Publication Date
WO2016167267A1 true WO2016167267A1 (fr) 2016-10-20

Family

ID=57126574

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2016/061873 WO2016167267A1 (fr) 2015-04-15 2016-04-13 Membrane semi-perméable du type à fibres creuses, module de membrane à fibres creuses et procédé de traitement d'eau par osmose directe

Country Status (2)

Country Link
JP (1) JP6743810B2 (fr)
WO (1) WO2016167267A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018136077A1 (fr) * 2017-01-20 2018-07-26 Trevi Systems Inc. Membrane d'osmose inverse assistée par pression osmotique et module
JP2020062622A (ja) * 2018-10-19 2020-04-23 東洋紡株式会社 中空糸膜エレメント、中空糸膜モジュールおよび正浸透水処理方法
US12274984B2 (en) 2021-06-28 2025-04-15 Asahi Kasei Kabushiki Kaisha Evaluation method and evaluation device for forward osmosis membrane module

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5418920A (en) * 1978-04-03 1979-02-13 Mitsubishi Rayon Co Ltd Production of hollow fibers
JPH01307409A (ja) * 1988-06-03 1989-12-12 Daicel Chem Ind Ltd 中空糸限外瀘過膜モジュールの自動リーク検出・警報装置
JP2001286743A (ja) * 2000-04-10 2001-10-16 Nok Corp ポリ−ｍ−フェニレンイソフタルアミド分離膜の製造法
WO2013118859A1 (fr) * 2012-02-09 2013-08-15 東洋紡株式会社 Membrane semi-perméable à fibres creuses, son procédé de fabrication, module et procédé de traitement de l'eau
JP2013212456A (ja) * 2012-04-02 2013-10-17 Jfe Engineering Corp 中空糸膜モジュール
JP2015054293A (ja) * 2013-09-12 2015-03-23 Ｊｆｅエンジニアリング株式会社 半透膜による水処理方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5418920A (en) * 1978-04-03 1979-02-13 Mitsubishi Rayon Co Ltd Production of hollow fibers
JPH01307409A (ja) * 1988-06-03 1989-12-12 Daicel Chem Ind Ltd 中空糸限外瀘過膜モジュールの自動リーク検出・警報装置
JP2001286743A (ja) * 2000-04-10 2001-10-16 Nok Corp ポリ−ｍ−フェニレンイソフタルアミド分離膜の製造法
WO2013118859A1 (fr) * 2012-02-09 2013-08-15 東洋紡株式会社 Membrane semi-perméable à fibres creuses, son procédé de fabrication, module et procédé de traitement de l'eau
JP2013212456A (ja) * 2012-04-02 2013-10-17 Jfe Engineering Corp 中空糸膜モジュール
JP2015054293A (ja) * 2013-09-12 2015-03-23 Ｊｆｅエンジニアリング株式会社 半透膜による水処理方法

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018136077A1 (fr) * 2017-01-20 2018-07-26 Trevi Systems Inc. Membrane d'osmose inverse assistée par pression osmotique et module
CN110636894A (zh) * 2017-01-20 2019-12-31 特雷维系统公司 渗透压辅助的反渗透膜和模块
CN110636894B (zh) * 2017-01-20 2022-06-03 特雷维系统公司 渗透压辅助的反渗透膜和模块
US11839853B2 (en) 2017-01-20 2023-12-12 Trevi Systems, Inc. Osmotic pressure assisted reverse osmosis membrane and module
JP2020062622A (ja) * 2018-10-19 2020-04-23 東洋紡株式会社 中空糸膜エレメント、中空糸膜モジュールおよび正浸透水処理方法
WO2020080469A1 (fr) * 2018-10-19 2020-04-23 東洋紡株式会社 Élément de membrane à fibres creuses, module de membrane à fibres creuses et procédé de traitement d'eau par osmose directe
JP7155862B2 (ja) 2018-10-19 2022-10-19 東洋紡株式会社 中空糸膜エレメント、中空糸膜モジュールおよび正浸透水処理方法
US11944939B2 (en) 2018-10-19 2024-04-02 Toyobo Mc Corporation Hollow fiber membrane element, hollow fiber membrane module, and method of forward osmosis water treatment
US12274984B2 (en) 2021-06-28 2025-04-15 Asahi Kasei Kabushiki Kaisha Evaluation method and evaluation device for forward osmosis membrane module

Also Published As

Publication number Publication date
JP6743810B2 (ja) 2020-08-19
JPWO2016167267A1 (ja) 2018-02-08

Similar Documents

Publication Publication Date Title
JP6521077B2 (ja) 水処理方法および水処理システム
JP6851306B2 (ja) 膜を作るためのコポリマー
JP2020039952A (ja) 血液浄化のための血液透析装置
JP2017515664A (ja) 多孔性非対称ポリフェニレンエーテル膜ならびに関連する分離モジュールおよび方法
JP2018528856A (ja) 膜を製造するための方法
CN111549448B (zh) 用于纤维形成的性能增强用添加剂和聚砜纤维
KR20170002531A (ko) 비대칭 폴리(페닐렌 에테르) 공중합체 막, 그것의 분리 모듈 및 제조 방법
JP6743810B2 (ja) 中空糸型半透膜、中空糸膜モジュールおよび正浸透水処理方法
JP6365542B2 (ja) 正浸透用中空糸膜エレメント及び膜モジュール
CN112867554B (zh) 中空纤维膜元件、中空纤维膜组件及正渗透水处理方法
JP6222237B2 (ja) 正浸透用中空糸膜エレメント及び膜モジュール
JP7261328B2 (ja) チューブラー型分離膜とそれを含むチューブラー型分離膜モジュール
WO2017122673A1 (fr) Membrane semi-perméable à fibres creuses pour osmose inverse ou osmose directe
JP6583416B2 (ja) 中空糸膜エレメント、中空糸膜モジュールおよび正浸透水処理方法
WO2016182015A1 (fr) Membrane poreuse à fibres creuses et son procédé de fabrication
JP6477872B2 (ja) 浸漬型中空糸膜モジュール、および、それを用いる正浸透水処理方法
US20210170335A1 (en) Method and tubular membrane for performing a forward osmosis processing
JP2015221400A (ja) 限外ろ過膜用中空糸膜の製造方法
WO2020009584A1 (fr) Procédé et membrane tubulaire pour effectuer un traitement d'osmose directe
US20220362717A1 (en) Polymeric membrane and methods for the production of same
JP7586305B2 (ja) ゼラチンまたはゼラチン濃縮溶液の製造方法
SG188687A1 (en) Thin film composite osmosis membranes
JP5423326B2 (ja) 中空糸膜の製造方法
JP2009136763A (ja) 中空糸型分離膜の製造方法
JP2008137004A (ja) 選択分離膜および選択分離膜の製造方法

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: 16780058

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2017512548

Country of ref document: JP

Kind code of ref document: A

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 16780058

Country of ref document: EP

Kind code of ref document: A1

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载