WO2022177284A1 - 3층 구조의 공급 스페이서 및 이를 포함하는 역삼투막 필터 모듈 - Google Patents
3층 구조의 공급 스페이서 및 이를 포함하는 역삼투막 필터 모듈 Download PDFInfo
- Publication number
- WO2022177284A1 WO2022177284A1 PCT/KR2022/002270 KR2022002270W WO2022177284A1 WO 2022177284 A1 WO2022177284 A1 WO 2022177284A1 KR 2022002270 W KR2022002270 W KR 2022002270W WO 2022177284 A1 WO2022177284 A1 WO 2022177284A1
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- WIPO (PCT)
- Prior art keywords
- reverse osmosis
- thickness
- warp yarns
- supply spacer
- layer structure
- Prior art date
Links
- 125000006850 spacer group Chemical group 0.000 title claims abstract description 88
- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 77
- 239000012528 membrane Substances 0.000 title claims abstract description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 74
- 238000000034 method Methods 0.000 claims description 7
- 239000012466 permeate Substances 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 description 16
- 238000000926 separation method Methods 0.000 description 10
- 230000010287 polarization Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000008213 purified water Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000012527 feed solution Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003204 osmotic effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000008223 sterile water Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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
- B01D63/10—Spiral-wound membrane modules
- B01D63/103—Details relating to membrane envelopes
-
- 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
- B01D61/10—Accessories; Auxiliary operations
-
- 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
- B01D61/025—Reverse osmosis; Hyperfiltration
-
- 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
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/08—Prevention of membrane fouling or of concentration polarisation
-
- 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
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/14—Specific spacers
- B01D2313/143—Specific spacers on the feed side
-
- 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 supply spacer having a three-layer structure and a reverse osmosis membrane filter module including the same.
- the reverse osmosis membrane permeated water by the reverse osmosis membrane becomes pure water or water close to infinitely pure water, and is used in various fields such as sterile water for medical use, purified water for population dialysis, or water for manufacturing semiconductors in the electronics industry.
- reverse osmosis two solutions having a difference in concentration are separated by a semipermeable membrane, and after a certain period of time, a solution having a lower concentration moves to a higher concentration, which is called an osmosis phenomenon.
- the difference in water level that occurs during this process is called reverse osmosis.
- a device that purifies water by passing only water molecules through a semi-permeable membrane using this principle is called a reverse osmosis system, and the semi-permeable membrane that goes into it is a reverse osmosis filter module.
- This reverse osmosis filter module is configured to include a central tube, a feed spacer, a reverse osmosis membrane (RO membrane), a tricot filter water, and the like.
- RO membrane reverse osmosis membrane
- the supply spacer mainly uses a diamond-shaped spacer, and serves as a passage through which raw water is introduced.
- the supply spacer not only secures a flow path between the separation membranes, but also generates turbulent flow in the raw water flow to alleviate concentration polarization occurring near the reverse osmosis membrane.
- An object of the present invention is to provide a supply spacer structure having a three-layer structure having different warp thicknesses and a reverse osmosis membrane filter module including the same in order to solve the above problems.
- a plurality of warp threads is located in parallel a first set; a second set provided intersecting the first set and comprising a plurality of parallel warp yarns; and a third set positioned parallel to the raw water direction and composed of a plurality of parallel warp yarns, wherein at least one of the first and second sets has a thickness smaller than a thickness of the warp yarns constituting the third set. It provides a supply spacer of a three-layer structure, characterized in that consisting of the warp of.
- Another embodiment of the present invention provides a reverse osmosis filter module including the supply spacer of the three-layer structure described above.
- the supply spacer according to the present invention has the effect of minimizing the pressure loss by suppressing the turbulence of raw water.
- the supply spacer according to the present invention suppresses the deposition of contaminants, thereby increasing the efficiency of the reverse osmosis filter module.
- FIG. 1 is a perspective view of a reverse osmosis filter module according to an embodiment of the present invention.
- Figure 2 (a) is a plan view of the supply spacer of a three-layer structure according to an embodiment of the present invention
- Figure 2 (b) is a reverse osmosis membrane on one side and the other side of the supply spacer of a three-layer structure according to an embodiment of the present invention It is a cross-sectional view of the positioned reverse osmosis filter module.
- FIG. 3 is an enlarged view of a portion of a plan view of a supply spacer having a three-layer structure according to an embodiment of the present invention according to FIG. 2 ( a ).
- 4 to 6 are plan views of the feed spacers of Comparative Examples 1 to 4, Examples 1 and 2;
- a plurality of warp threads are positioned in parallel, a first set; a second set provided intersecting the first set and comprising a plurality of parallel warp yarns; and a third set positioned parallel to the raw water direction and composed of a plurality of parallel warp yarns, wherein at least one of the first and second sets has a thickness smaller than a thickness of the warp yarns constituting the third set. It provides a supply spacer of a three-layer structure, characterized in that it consists of a warp yarn.
- parallel position means that a plurality of warp yarns constituting the same set are spaced apart or spaced apart so as not to cross each other. It can be confirmed from the top view measured using a microscope (device name: Dino-Lite Premier AM7013MZT manufacturer: Dino-lite).
- thickness of the warp yarn means the average thickness of the warp yarns constituting each set, and a top view measured using a microscope (device name: Dino-Lite Premier AM7013MZT manufacturer: Dino-lite) ) is the value obtained from the thickness and size.
- the thickness may mean the width (t1, t2, t3) of the warp yarn observed in a plan view as shown in FIG. 3 . That is, comparing the size of the thickness means comparing the average thickness of the warp yarns constituting each set. Therefore, in the present specification, “same thickness” means that the average thickness of the warp yarns constituting each set is the same. The deviation of the thickness may preferably be ⁇ 0.050 mm or less.
- SPI is an abbreviation of strand per inch, which means the number of warp yarns per unit length when 1 inch is a unit length, and can be referred to as "the number of warp yarns per unit length". More specifically, it means the total number of warp yarns constituting each set within 1 inch of unit length in the flow path direction of the supply spacer, measured using a microscope (device name: Dino-Lite Premier AM7013MZT, manufacturer: Dino-lite) Measured by counting warp yarns per inch from the top view, or it can be calculated by dividing the distance of 1 inch by the distance from one warp yarn to the point of intersection (L1 in Figure 2) under the microscope. The following may be preferable.
- the number of warp yarns per unit length of the feed spacer according to the present invention may be 4 to 9, preferably 4 to 6.
- the distance L between the intersection points formed by crossing the first set 10 and the second set 20 may be 3,800 ⁇ m to 12,000 ⁇ m.
- Figure 2 (a) is a plan view of the supply spacer of a three-layer structure according to an embodiment of the present invention
- Figure 2 (b) is a reverse osmosis membrane on one side and the other side of the supply spacer of a three-layer structure according to an embodiment of the present invention It is a cross-sectional view of the positioned reverse osmosis filter module.
- the supply spacer according to the present invention may be composed of a first set 10, a second set 20 and a third set 30 in which a plurality of warp threads (Stand) are positioned in parallel.
- Stand warp threads
- the first set 10 and the second set 20 are positioned at an angle to the raw water flow direction with respect to the raw water flow direction, and may be referred to as diagonal lines, respectively, and the third set (30) is located parallel to the raw water flow direction with respect to the raw water flow direction, it can be referred to as a center line.
- the supply spacer may not support the separation membranes used in the manufacture of the reverse osmosis filter module.
- the cross-sectional area of the flow path in the flow direction is reduced by the thickness of the actual supply spacer, and thus a problem of increasing the differential pressure may occur.
- the supply spacer according to the present invention in which the third set (or center line) is present can support between the separation membranes used in the manufacture of the reverse osmosis filter module even at a relatively low SPI value due to the third set (or center line). , has the effect of preventing the problem of increasing differential pressure (Reference: Engineering aspects of reverse osmosis module design, Jon Johnson & Markus Busch, Dow Water & Process Solutions, Liquid Separations Application Development Laboratory Published online: 03 Aug 2012.).
- a plurality of warp yarns may be positioned in parallel, wherein the warp yarns may be positioned at an angle to the raw water direction.
- the second set 20 may be positioned to cross the first set 10 .
- the second set 20 may be positioned in a direction opposite to that of the first set 10 so that the first set 10 and the second set 20 may be provided in a lattice shape.
- the third set 30 may have one or more and a plurality of warp yarns positioned in parallel, where the warp yarns may be positioned parallel to the raw direction.
- first set 10 may be positioned at an angle of 10 ° to 80 ° relative to the flow direction of the raw water
- second set 20 is positioned at an angle of 100 ° to 170 ° relative to the flow direction of the raw water.
- angle a between the first set 10 and the second set 20 may be formed in a range of 50° to 90°, preferably 70° to 85°.
- the in-between angle refers to a part a of FIG. 2 .
- the warp yarns constituting the first set 10 are formed inclined by 60° with respect to the flow direction of raw water
- the warp yarns of the second set 20 are 150° to 170° with respect to the flow direction of the raw water. It can be positioned tilted.
- the angle between the first set 10 and the second set 20 is 50°
- the warp yarns constituting the first set 10 are formed inclined by 30° with respect to the flow direction of the raw water
- the second The warp yarns of the set 20 may be positioned at an angle of 160° relative to the flow of raw water.
- the angle between the first set 10 and the second set 20 is less than 50°, the distance from the third set 30 to be described later becomes smaller, so that the cross-sectional area of the flow path formed by the warp yarn is reduced and the supply spacer Since the laminar flow velocity gradient does not occur in the central part, there may be a problem in that the polarization phenomenon increases. There may be a problem in that the pressure loss increases by actively occurring in the direction.
- the flow path is formed by the warp yarns constituting each set, and may mean an empty space between the reverse osmosis membrane positioned above and below the supply spacer and each set.
- the third set 30 is positioned parallel to the flow direction of the raw water, and may be positioned between the first set 10 and the second set 20 or at the top of the three sets. That is, the first set 10 may be placed on one side of the second set 20 and one side of the second set 20 . More specifically, when the second set 20 is positioned on top of the first set 10 in the set stacking order, the third set 30 is positioned on one side of the second set 20 , that is, on the upper part. can be In addition, when the first set 10 is positioned on the second set 20 in the set stacking order, the third set 30 may be positioned on the first set 10 .
- the supply spacer is not in contact with the set in direct contact with the reverse osmosis membrane. It may consist of non-sets. More specifically, the third set 30 is not in direct contact with the reverse osmosis membrane. The first set 10 and the second set 20 are in contact with the reverse osmosis membrane.
- the first set 10 and the second set 20 may be in contact with the reverse osmosis membrane and serve to support the feed spacer structure, and the interfacial flow of raw water between the reverse osmosis membrane and the reverse osmosis membrane may be periodically convected to the center of the feed spacer structure.
- the supply spacer according to the present invention convects the interfacial flow of raw water to the third set 30, and the third set 30 generates a laminar flow velocity gradient of the interfacial flow to reduce the polarization phenomenon. effect may occur.
- the feed water may flow in a diagonal direction from the flow direction of the feed water.
- the third set 30 may be provided at an intersection of the first set 10 and the second set 20 , or at any one of 1/5 to 4/5 points between the intersection and the intersection.
- the feed spacer according to the present invention may be manufactured by a fusion bonding method.
- the first set 10, the second set 20, and the third set 30 are extruded in a bonded state, or the first set 10 and the third set 30 or the second set 20 and the second set After the three sets 30 are extruded in a bonded state, the second or first sets may be laminated and bonded together.
- the spacing between the warp yarns forming the first to third sets 10, 20, 30 according to the present invention may be 4 mm to 12 mm.
- the interval between the warp yarns is less than 4 mm, the turbulent flow of raw water may occur more than necessary, resulting in an increase in pressure loss.
- the interval between the warp yarns is more than 12 mm, a section in which the vertical flow of raw water does not occur occurs, so that a laminar flow velocity gradient does not occur.
- a cross-sectional area of a flow path in the flow direction is reduced, which may cause a problem in which a differential pressure is increased.
- one of the first set and the second set is composed of a warp yarn having a thickness smaller than that of the warp yarn constituting the third set, and the other is a warp yarn constituting the third set. It is possible to provide a supply spacer of a three-layer structure, characterized in that it consists of a warp yarn having the same thickness as the thickness of.
- both the first set and the second set provide a supply spacer having a three-layer structure, characterized in that it consists of warp yarns having a thickness smaller than that of the warp yarns constituting the third set. can do.
- the ratio of the thickness of the warp yarns constituting the third set and the warp yarns having a thickness smaller than the thickness of the warp yarns constituting the third set is 1.1 to 1.5: 1, preferably 1.1 to It is characterized in that it is 1.4:1.
- the warp yarns constituting the third set are 1.1 to 1.5 times thicker, preferably 1.1 to 1.4 times thicker than the warp yarns having a smaller thickness than the warp yarns constituting the third set.
- the warp yarns constituting the third set can be expressed as warp yarns having a large thickness.
- the ratio of the thickness of the warp yarn having a large thickness and the warp yarn having a small thickness is 1.1 to 1.5: 1, preferably 1.1 to 1.4: 1 characterized in that.
- the thickness of the warp yarn having a large thickness is 1.1 times to 1.5 times that of the warp yarn having a small thickness, preferably 1.1 times to 1.4 times thicker than the warp yarn having a small thickness.
- the thickness of the warp yarn having a small thickness may be provided in a range of 150 ⁇ m to 190 ⁇ m.
- the thickness of the warp yarn constituting the third set may be provided in a range of 205 ⁇ m to 385 ⁇ m.
- the thickness of the warp yarn having a large thickness may be provided in a range of 205 ⁇ m to 385 ⁇ m.
- the thickness of the supply spacer is characterized in that 600 ⁇ m to 900 ⁇ m.
- the thickness of the warp yarns constituting each set is less than 150 ⁇ m, a phenomenon in which the warp yarns are cut occurs, thereby limiting the manufacture of the supply spacer, and when the thickness of the supply spacer is less than 600 ⁇ m, the supply spacer structure cannot be supported. can occur
- the thickness of the warp yarn is more than 300 ⁇ m and the thickness of the supply spacer is more than 900 ⁇ m, it is necessary to reduce the thickness of the separator or tricot used in the manufacture of the reverse osmosis filter module. Degrading stability and reducing the flow rate of the reverse osmosis filter module may occur.
- the thickness of the warp yarns constituting the supply spacer it is possible to suppress the occurrence of turbulence, thereby reducing the pressure loss of the fluid can occur.
- it is possible to secure the void fraction and the effective reverse osmosis membrane area of the channel through which the raw water can flow it is possible to improve the physical properties of the produced water as well as improve the differential pressure.
- the number of warp yarns per unit length of the feed spacer according to the present invention may be 4 to 9, preferably 4 to 6.
- the distance L between the intersection points formed by crossing the first set 10 and the second set 20 may be 3,800 ⁇ m to 12,000 ⁇ m.
- the number of warp yarns per unit length may mean the number of warp yarns corresponding to one side of the flow path per inch. That is, the first set 10, the second set 20, and the third set 30 may mean the number of warp yarns formed between intersections intersecting each other.
- the SPI is less than 4 and the distance between the intersection points is more than 12,000 ⁇ m, the cross-sectional area of the flow path decreases and a laminar flow velocity gradient does not occur in the central part of the supply spacer, which may cause a problem in that the polarization phenomenon increases, and the SPI exceeds 9;
- the distance between the intersections is less than 3,800 ⁇ m, the cross-sectional area of the flow path increases and the flow of raw water actively in the vertical direction may cause a problem in that the pressure loss increases.
- supply spacer thickness means a distance between one surface and one surface of the supply spacer based on the vertical direction of the raw water flow.
- an ABS digital matic indicator Mitsubishi Chemical Company LLC (Mitutoyo corp. model name ID-C125XB product) was used.
- the condition of 1 inch (25.4 mm) of foot size (diameter) was used under the weight load of 10 oz (284 g).
- the present invention provides a reverse osmosis filter module, including the supply spacer of the three-layer structure according to the present application described above.
- the reverse osmosis filter module may include: a tube including an opening for receiving a permeate in a longitudinal direction; and one or more reverse osmosis membranes extending outwardly from the tube and wound around the tube, wherein the supply spacer is in contact with the one or more reverse osmosis membranes and is wound around the tube.
- the reverse osmosis filter module is a component of a membrane separation device that actually purifies supplied water using the reverse osmosis principle.
- the reverse osmosis filter module may include a reverse osmosis membrane 200 , a supply spacer 100 , a tricot filtration channel 300 , and a tube 400 including an opening for receiving a permeate along the length direction.
- a pair of telescoping prevention devices (not shown) may be further included, but a detailed description thereof will be omitted.
- the one or more reverse osmosis membranes 200 filter foreign substances contained in water by using the osmosis phenomenon, and at the same time serve as a flow path so that purified water flows effectively.
- One or more such reverse osmosis membranes extend outwardly from the tube and are wound around the tube.
- the supply spacer 100 may be provided with the supply spacer 100 according to the present invention described above.
- the supply spacer 100 may be provided in a three-layer structure, where the three-layer refers to a structure in which three warp yarns constituting the supply spacer 100 are stacked, and a plurality of warp yarns are positioned in parallel. It may refer to a form in which a set of layers is constituted and three sets are stacked.
- the supply spacer 100 is provided in a three-layer structure, and thus may be divided into a set that is in contact with the reverse osmosis membrane 200 and a set that is not in contact with the reverse osmosis membrane 200 .
- the first and second sets may be in contact with one or more reverse osmosis membranes 200
- the third set may be non-contact with one or more reverse osmosis membranes 200 .
- the set in contact with the reverse osmosis membrane 200 may convect the flow direction of the raw water supplied to the reverse osmosis filter module to the center of the supply spacer 100 , that is, the set not in contact with the reverse osmosis membrane 200 .
- the supply spacer 100 forms a passage through which raw water is introduced from the outside, and serves to maintain a gap between one reverse osmosis membrane 200 and the other reverse osmosis membrane 200 .
- the supply spacer 100 is configured to be in contact with the one or more reverse osmosis membranes 200 at the upper and lower sides and to be wound around the tube like the one or more reverse osmosis membranes 200 .
- a case may occur where some raw water flows inside or outside the supply spacer 100 from the outside of the supply spacer 100 configured to be wound around the tube.
- the third set 30 when the third set 30 is positioned on one side of the second set 20 , the third set 30 positioned at the top flows in parallel to the raw water flow direction. can be used to separate the halves. Therefore, the first set 10 in direct contact with the reverse osmosis membrane convects the raw water interface flow into the second set 20, and the third set 30 separates the raw water in half and convects the raw water into the second set 20. Convection phenomenon occurs periodically near the interface of the reverse osmosis membrane, thereby minimizing the pressure loss of the supply spacer according to the present invention.
- the material of the supply spacer 100 is not particularly limited, but preferably composed of any one of polyethylene, polyvinyl chloride, polyester, polypropylene, and mixtures thereof. do.
- the tricot filtration channel 300 generally has a fabric-like structure, and serves as a channel for creating a space through which the purified water can flow through the reverse osmosis membrane 200 .
- the tricot filtration water 300 generally has a fabric-like structure, and serves as a channel for creating a space through which the purified water can flow through the reverse osmosis membrane 10 .
- the tube 400 is located at the center of the reverse osmosis filter module, and serves as a passage through which filtered water is introduced and discharged.
- a pore (or opening) of a predetermined size is formed on the outside of the tube 400 so that filtered water is introduced. At this time, it is preferable that one or more pores are formed so that the filtered water can be introduced more efficiently.
- Comparative Examples 1 to 3 consist of only the first set and the second set satisfying the thickness, the angle formed by the first and second sets (slanted lines, A and C), the SPI, and the thickness ratio between the warp yarns, respectively, as shown in Table 1 below. It is a layered diamond-shaped supply spacer.
- Comparative Example 4 The structure of Comparative Example 4 is shown in FIGS. 5 and 6 below. However, the thickness ratio of the warp yarn is shown in Table 1 below.
- Examples 1 to 3 are respectively the first and second sets (A, A, A supply spacer of a three-layer structure according to the invention comprising C) and a third set (center line, B).
- Examples 1 to 3 are shown in FIGS. 5 and 6 below. At this time, the thickness ratio of the warp yarn is shown in Table 1 below.
- the differential pressure ( ⁇ P (psi)) in Table 1 means a value measured under the conditions of a membrane area of 400 ft 2 , a temperature of 25° C. and a pressure of 225 psi, NaCl 2,000 ppm, and an average flow rate of 44 GPM. More specifically, the differential pressure measured under the 44 GPM average flow rate was obtained using a regression equation based on the individual differential pressures at the concentrated water flow rate of 10 GPM to 60 GPM.
- the average flow rate means the arithmetic mean value of the feed water flow rate and the concentrated water flow rate.
- the salt removal rate and flow rate in Table 1 means values measured under the conditions of a temperature of 25° C. and a pressure of 225 psi, NaCl 2,000 ppm, and a recovery rate of 15%.
- Gallons per Minute is Gallons per Minute and represents a unit of flow per minute.
- Examples 1 to 3 are the same three-layer structure spacer, but the third set and one of the first or second sets of warp yarns are stronger than the warp yarns of the other set.
- the thickness was large, it was confirmed that the effect of reducing the differential pressure was greater.
- the sum of the thicknesses of the two warp yarns maintains the distance (distance) between the separation membranes, so that the thickness of each warp yarn is about half the thickness of the supply channel material. Accordingly, as can be seen in FIG. 7 below, turbulence in the feed flow direction is also generated as thick as the thickness, and this resistance to turbulence is a cause of differential pressure.
- the sum of the thicknesses of the three warp yarns maintains the distance (distance) between the separation membranes, so that the thickness of each warp yarn is about 1/3.
- the vicinity of the center line (B) of the three-layer spacer coincides with the flow direction of the feed solution, so turbulence occurs less, and the oblique lines (A, C) above and below the center line impede the flow of raw water.
- the three-layered spacer is eventually reduced in pressure.
- the thickness of the warp of the center line and/or the thickness of the warp of one oblique line was made thicker than the thickness of the warp of the other oblique line to further lower the flow resistance of the pore solution, and as a result, the differential pressure was more effectively reduced could do it
- Example 2 can more effectively reduce the differential pressure.
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- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nanotechnology (AREA)
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
Description
두께 (mm) |
각도a (°) | SPI | 날실의 굵기 비율 | △P (psi) | 염제거율 (%) |
유량 (GPD) |
|||
A | B | C | |||||||
비교예 1 | 0.889 | 80 | 5.5 | 1 | NA | 1 | 2.34 | 99.78% | 11,700 |
비교예 2 | 0.889 | 90 | 5 | 1 | NA | 1 | 2.10 | 99.80% | 11,395 |
비교예 3 | 0.889 | 65 | 5 | 1 | NA | 1 | 2.06 | 99.77% | 11,426 |
비교예 4 | 0.889 | 75 | 4.5 | 1 | 1 | 1 | 1.52 | 99.80% | 11,560 |
실시예 1 | 0.889 | 80 | 5 | 1.1 | 1.1 | 1 | 1.43 | 99.80% | 11,523 |
실시예 2 | 0.889 | 80 | 5 | 1 | 1.4 | 1 | 1.32 | 99.77% | 11,600 |
실시예 3 | 0.889 | 75 | 5 | 1 | 0.7 | 1 | 1.52 | 99.77% | 11,800 |
Claims (10)
- 복수개의 날실(Strand)이 평행하게 위치되는 제1 세트;상기 제1 세트와 교차되어 제공되고, 복수개의 평행한 날실로 구성되는 제2 세트; 및원수 방향과 평행하게 위치되고, 복수개의 평행한 날실로 구성되는 제3 세트;를 포함하고,상기 제1 세트 및 제2 세트 중 적어도 하나는 상기 제3 세트를 구성하는 날실의 굵기보다 작은 굵기의 날실로 구성되는 것을 특징으로 하는3층 구조의 공급 스페이서.
- 제1항에 있어서,상기 제1 세트 및 제2 세트 중 하나는 상기 제3 세트를 구성하는 날실의 굵기보다 작은 굵기의 날실로 구성되고,나머지 하나는 상기 제3 세트를 구성하는 날실의 굵기와 동일한 굵기를 가지는 날실로 구성되는 것을 특징으로 하는,3층 구조의 공급 스페이서.
- 제1항에 있어서,상기 제1 세트 및 제2 세트는 모두 상기 제3 세트를 구성하는 날실의 굵기보다 작은 굵기의 날실로 구성되는 것을 특징으로 하는,3층 구조의 공급 스페이서.
- 제1항에 있어서,상기 공급 스페이서의단위 길이당 날실의 수(Strand per inch, SPI)는 4 내지 9인 것을 특징으로 하는,3층 구조의 공급 스페이서.
- 제1항에 있어서,상기 제1 세트 및 제2 세트의 교점간의 거리는, 3,800㎛ 내지 12,000㎛인 것을 특징으로 하는,3층 구조의 공급 스페이서.
- 제1항에 있어서,상기 제1 및 제2 세트가 이루는 각도는, 50°내지 90°인 것을 특징으로 하는, 3층 구조의 공급 스페이서.
- 제1항에 있어서,상기 제3 세트를 구성하는 날실과 상기 제3 세트를 구성하는 날실의 굵기보다 작은 굵기를 가지는 날실의 굵기의 비는 1.1 내지 1.5 : 1인 것을 특징으로 하는,3층 구조의 공급 스페이서.
- 제1항에 있어서,상기 공급 스페이서의 두께는 600㎛ 내지 900㎛인 것을 특징으로 하는,3층 구조의 공급 스페이서.
- 제1항 내지 제8항 중 어느 한 항에 따른 3층 구조의 공급 스페이서를 포함하는,역삼투압 필터 모듈.
- 제9항에 있어서,상기 역삼투압 필터 모듈은,길이 방향을 따라 투과액을 수용하는 개구를 포함하는 튜브; 및상기 튜브로부터 외측 방향으로 연장되고 상기 튜브 둘레로 권취되는 하나 이상의 역삼투막;을 포함하고,상기 공급 스페이서는,상기 하나 이상의 역삼투막과 접촉하며, 상기 튜브 둘레로 권취되는 것을 특징으로 하는, 역삼투압 필터 모듈.
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US18/014,864 US20230285901A1 (en) | 2021-02-16 | 2022-02-16 | Feed spacer having three-layered structure and reverse osmosis membrane filter module comprising same |
EP22756482.0A EP4295942A1 (en) | 2021-02-16 | 2022-02-16 | Feed spacer having three-layered structure and reverse osmosis membrane filter module comprising same |
CN202280005571.7A CN116096480A (zh) | 2021-02-16 | 2022-02-16 | 具有三层结构的供给间隔件和包括该供给间隔件的反渗透膜过滤模块 |
JP2022580251A JP2023535282A (ja) | 2021-02-16 | 2022-02-16 | 3層構造の供給スペーサおよびそれを含む逆浸透膜フィルタモジュール |
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KR10-2021-0020423 | 2021-02-16 |
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2022
- 2022-02-16 EP EP22756482.0A patent/EP4295942A1/en active Pending
- 2022-02-16 WO PCT/KR2022/002270 patent/WO2022177284A1/ko active Application Filing
- 2022-02-16 CN CN202280005571.7A patent/CN116096480A/zh active Pending
- 2022-02-16 JP JP2022580251A patent/JP2023535282A/ja active Pending
- 2022-02-16 US US18/014,864 patent/US20230285901A1/en active Pending
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KR20220116941A (ko) | 2022-08-23 |
US20230285901A1 (en) | 2023-09-14 |
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JP2023535282A (ja) | 2023-08-17 |
EP4295942A1 (en) | 2023-12-27 |
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