WO2017057833A1 - Module de filtre à osmose inverse - Google Patents

Module de filtre à osmose inverse Download PDF

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Publication number
WO2017057833A1
WO2017057833A1 PCT/KR2016/008164 KR2016008164W WO2017057833A1 WO 2017057833 A1 WO2017057833 A1 WO 2017057833A1 KR 2016008164 W KR2016008164 W KR 2016008164W WO 2017057833 A1 WO2017057833 A1 WO 2017057833A1
Authority
WO
WIPO (PCT)
Prior art keywords
reverse osmosis
filter module
osmosis filter
filaments
water
Prior art date
Application number
PCT/KR2016/008164
Other languages
English (en)
Korean (ko)
Inventor
최준원
임예훈
손형준
지영명
Original Assignee
주식회사 엘지화학
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
Priority claimed from KR1020160094188A external-priority patent/KR102046685B1/ko
Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to EP16851981.7A priority Critical patent/EP3357559B1/fr
Priority to CN201680046867.8A priority patent/CN107921368B/zh
Priority to US15/745,975 priority patent/US10576422B2/en
Priority to JP2018501157A priority patent/JP6609874B2/ja
Publication of WO2017057833A1 publication Critical patent/WO2017057833A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • 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
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/10—Spiral-wound membrane modules
    • 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
    • B01D63/101—Spiral winding
    • 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
    • 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

Definitions

  • the present invention relates to a reverse osmosis filter module comprising an improved feed spacer, wherein the reverse osmosis filter module has an asymmetric diameter in the end point region where the first and second sets of filaments intersect, thereby increasing the cross-sectional area of the flow path and reducing the differential pressure.
  • a reverse osmosis filter module comprising an improved feed spacer capable of developing a flow to mitigate concentration polarization.
  • the reverse osmosis membrane permeated water by the reverse osmosis membrane is pure water or almost unlimited water, and is used in various fields such as medical sterile water, purified dialysis water for dialysis, or water for manufacturing semiconductors in the electronic industry.
  • the reverse osmosis filter module includes a central tube, a feed spacer, a reverse osmosis membrane, a tricot filtrate, and the like.
  • the supply spacer serves as a passage through which raw water flows.
  • the differential pressure is generated due to the disturbance of the flow by the feed spacer, which leads to an increase in the energy cost, so that the lower the differential pressure, the higher the efficiency of the reverse osmosis filter module.
  • An object of the present invention is to have an asymmetrical diameter in the end point region where the first and second sets of filaments intersect, thereby improving the cross-sectional area of the flow path to reduce the differential pressure while developing a vortex flow to mitigate concentration polarization. It is to provide a reverse osmosis filter module comprising a supply spacer.
  • Reverse osmosis filter module includes a tube including an opening for receiving the permeate along the longitudinal direction; One or more reverse osmosis membranes extending outwardly from the tube and wound around the tube; And a feed spacer in contact with the at least one reverse osmosis membrane, the feed spacer being wound around the tube, wherein the feed spacer includes a first set of filaments parallel to each other and a second set of filaments parallel to each other And at least one of the first set or at least one of the second set in an end point region where the first set and the second set intersect has an asymmetric diameter in which a portion of the outer surface protrudes outward. It is characterized by including.
  • the endpoint region may be in a ratio of 0.2 to 0.4 based on the lattice length of the supply spacer.
  • the thinning parameter may be 1.2 or more, more preferably the thinning parameter may be 1.3 or more.
  • the asymmetric diameter, one side of the filaments with respect to the flow direction of the raw water can be projected toward the outside and the other side can be maintained as it is.
  • the present invention by designing to have an asymmetric diameter in the end point region where the first set and the second set of filaments intersect, it is possible to increase the cross-sectional area of the flow path to lower the differential pressure, and also to develop the vortex flow to mitigate concentration polarization. You can do it.
  • the effect of the above-described effects can be generated that can further increase the efficiency of the reverse osmosis filter module.
  • FIG. 1 is a perspective view of a reverse osmosis filter module 100 for water treatment according to an embodiment of the present invention.
  • FIG 3 is a perspective view of a supply spacer used in the reverse osmosis filter module 100 for water treatment according to an embodiment of the present invention.
  • FIGS. 4A and 4B are front and side cross-sectional views of a feed spacer used in the reverse osmosis filter module 100 for water treatment according to an embodiment of the present invention.
  • FIG. 1 is a perspective view of a reverse osmosis filter module 100 for water treatment according to an embodiment of the present invention
  • Figures 2 (a), (b) and (c) is a conventional supply spacer used in the reverse osmosis filter module
  • 3 is a perspective view of a supply spacer used in the reverse osmosis filter module 100 for water treatment according to an embodiment of the present invention
  • FIGS. 4 (a) and 4 (b) illustrate the embodiment of the present invention.
  • Reverse osmosis membrane module 100 is a component of the membrane separation device that serves to purify the water actually supplied using the reverse osmosis principle.
  • the reverse osmosis membrane module 100 includes a reverse osmosis membrane 10, a supply spacer 20, a tricot filtration channel 30, and an opening (not shown) for receiving a permeate along the length direction. It may include a tube 40 to. Also, although not shown in the drawings, a pair of anti-telescoping devices may be further included, but a detailed description thereof will be omitted.
  • the at least one reverse osmosis membrane 10 filters the foreign matter contained in the water by using an osmosis phenomenon, and at the same time serves as a flow path for the purified water to flow effectively.
  • One or more such reverse osmosis membranes 10 extend outwardly from the tube 40 and are wound around the tube 40.
  • the supply spacer 20 forms a passage through which raw water flows from the outside, and serves to maintain a gap between one reverse osmosis membrane 10 and the other reverse osmosis membrane 10.
  • the feed spacer 20 is configured to be in contact with the one or more reverse osmosis membranes 10 above and below and to be wound around the tube 40 like the one or more reverse osmosis membranes 10.
  • the material of the supply spacer 20 is not particularly limited, but is preferably composed of one of polyethylene, polyvinyl chloride, polyester, and polypropylene.
  • the tricot filtered water channel 30 generally has a structure in the form of a fabric, and serves as a flow path for creating a space through which the purified water can flow through the reverse osmosis membrane 10.
  • the fabric tissue line of the tricot filtration channel 30 to withstand the water pressure generated during the operation of the reverse osmosis membrane module 100 to move the appropriate amount of water without blocking the water between the lines, so that the tricot filtration water ( 30) is configured to have sufficient strength to withstand water pressure.
  • the tube 40 is located at the center of the reverse osmosis filter module 100 for water treatment, and serves as a passage through which filtered water is introduced and discharged.
  • a gap (or opening) of a predetermined size is formed outside the tube 40 so that filtered water flows in. At this time, it is preferable that one or more pores are formed so that the filtered water can be introduced more efficiently.
  • the supply spacer 20 is configured such that the first set 21 of parallel filaments and the second set 22 of parallel filaments cross each other. Any one or more of the first set 21 and / or any one or more of the second set 22 may have an asymmetrical diameter near the intersection near the endpoint where the 21 and the second set 22 intersect.
  • the conventional feed spacers 20a, 20b, 20c at the point where two parallel sets of filaments intersect, they remain unchanged without changing the diameter of the filaments (see FIG. 2 (a)), or two sets of parallel filaments It can be seen that the diameter of the filaments becomes thinner at the point where they cross (see FIG. 2 (b)), or the diameter of the filaments is thickened at the point where two parallel sets of filaments intersect (Fig. 2 (c)). Reference). It can also be seen that the diameter of these filaments is configured to increase or decrease symmetrically with respect to the cross section.
  • the supply spacer 20 is configured such that only the outer portion of the first set 21 and / or the second set 22 of filaments protrudes outwardly in the end point region, more specifically, Only a part of the outer portion of the filaments protrudes outward and the portion corresponding to the other side of the protruding portion is maintained as it is, so that the asymmetric cross-sectional shape of the filaments can be constructed while increasing the cross-sectional area of the flow path (FIG. ) And Figure (b)).
  • the endpoint region L2 may be in a ratio of 0.2 to 0.4 based on the grid length L1 of the supply spacer 20. This is because when it is less than 0.2, it is difficult to generate vortex flow sufficiently, and when it exceeds 0.4, the cross-sectional area decreases and the differential pressure increases.
  • the thinning parameter of the first set 21 and / or the second set 22 in the endpoint region L2 may be 1.2 or more, more preferably 1.3 or more.
  • the thinning parameter here refers to the asymmetry of the asymmetric part W2 in the end point region L2 with respect to the thin part W1 in the thickness of the filaments of the first set 21 and / or the second set 22. Note the thickness ratio.
  • first set 21 and the second set 22 are both shown to have an asymmetric diameter, it should be noted that only one or more of the cross sections may have an asymmetric diameter.
  • Comparative Example 1 is a case using a feed spacer that is maintained as it is without changing the diameter of the filaments at the intersection
  • Comparative Example 2 is a case using a feed spacer configured to thin the diameter of the filament at the intersection
  • Comparative Example 3 The case of using a feed spacer configured to thicken the diameter of the filaments at the intersection point
  • the embodiment is the case of using the feed spacer 20 according to the present invention configured to asymmetrically thicken only a portion of the diameter of the filaments at the intersection point.
  • Comparative Example 1 shows a differential pressure of 1,238 Pa, a flow direction average vorticity of 1,531
  • Comparative Example 2 shows a differential pressure of 1,071 Pa, and a flow direction average vorticity of 1,340
  • Comparative Example 3 shows that the differential pressure is 986 Pa, the flow direction average eddy is 1,380
  • Example shows the differential pressure is 958 Pa, the flow direction average eddy is 1,399.
  • the embodiment using the feed spacer 20 according to the present invention was found to generate a considerably high level of vortex, thereby facilitating the movement of salt near the reverse osmosis membrane. It was confirmed.
  • Comparative Example 1 is 6.75% recovery
  • Comparative Example 2 is 6.35%
  • Comparative Example 3 is 6.73%
  • Example The recovery is 6.85%.
  • the supply spacer 20 minimizes the differential pressure by changing the shape of the filaments (or strands) having the same maximum and minimum diameters and increases the generation of the vortex to increase the recovery performance It can be seen that the improvement.

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

Abstract

La présente invention concerne un module de filtre à osmose inverse comprenant un intercalaire d'alimentation amélioré, et concerne un module de filtre à osmose inverse comprenant un intercalaire d'alimentation amélioré, ledit module ayant un diamètre asymétrique dans une zone de point d'extrémité dans laquelle un premier ensemble et un second ensemble de filaments sont croisés, de manière à développer un écoulement turbulent lors de l'abaissement de la pression différentielle, en augmentant une zone de section transversale d'un trajet d'écoulement, ce qui permet d'atténuer la polarisation de la concentration.
PCT/KR2016/008164 2015-09-30 2016-07-26 Module de filtre à osmose inverse WO2017057833A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP16851981.7A EP3357559B1 (fr) 2015-09-30 2016-07-26 Module de filtre à osmose inverse
CN201680046867.8A CN107921368B (zh) 2015-09-30 2016-07-26 反渗透过滤模块
US15/745,975 US10576422B2 (en) 2015-09-30 2016-07-26 Reverse osmosis filter module
JP2018501157A JP6609874B2 (ja) 2015-09-30 2016-07-26 逆浸透フィルタモジュール

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2015-0137812 2015-09-30
KR20150137812 2015-09-30
KR10-2016-0094188 2016-07-25
KR1020160094188A KR102046685B1 (ko) 2015-09-30 2016-07-25 역삼투압 필터 모듈

Publications (1)

Publication Number Publication Date
WO2017057833A1 true WO2017057833A1 (fr) 2017-04-06

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Application Number Title Priority Date Filing Date
PCT/KR2016/008164 WO2017057833A1 (fr) 2015-09-30 2016-07-26 Module de filtre à osmose inverse

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Country Link
WO (1) WO2017057833A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108176235A (zh) * 2018-01-19 2018-06-19 南京工业大学 一种新构型隔网
EP3608012A4 (fr) * 2017-12-12 2020-06-17 Lg Chem, Ltd. Entretoise d'alimentation et module de filtre d'osmose inverse comprenant une telle entretoise

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100976074B1 (ko) * 2002-05-02 2010-08-17 필름텍 코포레이션 개선된 공급 스페이서를 포함하는 나선형 권취 부재
US20120328844A1 (en) * 2010-03-08 2012-12-27 Mn Beteiligungs Gmbh Spacer for Filtration Devices
WO2013085755A2 (fr) * 2011-12-09 2013-06-13 General Electric Company Espaceurs d'alimentation pour élément membranaire enroulé en spirale
KR20140107214A (ko) * 2011-12-02 2014-09-04 도레이 카부시키가이샤 분리막 엘리먼트 및 분리막 엘리먼트의 제조 방법

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100976074B1 (ko) * 2002-05-02 2010-08-17 필름텍 코포레이션 개선된 공급 스페이서를 포함하는 나선형 권취 부재
US20120328844A1 (en) * 2010-03-08 2012-12-27 Mn Beteiligungs Gmbh Spacer for Filtration Devices
KR20140107214A (ko) * 2011-12-02 2014-09-04 도레이 카부시키가이샤 분리막 엘리먼트 및 분리막 엘리먼트의 제조 방법
WO2013085755A2 (fr) * 2011-12-09 2013-06-13 General Electric Company Espaceurs d'alimentation pour élément membranaire enroulé en spirale

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GUILLEN, GREG ET AL.: "Modeling the Impacts of Feed Spacer Geometry on Reverse Osmosis and Nanofiltration Processes", CHEMICAL ENGINEERING JOURNAL, vol. 149, 2009, pages 221 - 231, XP026077481 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3608012A4 (fr) * 2017-12-12 2020-06-17 Lg Chem, Ltd. Entretoise d'alimentation et module de filtre d'osmose inverse comprenant une telle entretoise
US11478750B2 (en) * 2017-12-12 2022-10-25 Lg Chem, Ltd. Feed spacer and reverse osmosis filter module including same
CN108176235A (zh) * 2018-01-19 2018-06-19 南京工业大学 一种新构型隔网

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