WO2012008115A1 - Unité de filtration sur membrane de type à immersion et appareil de filtration sur membrane de type à immersion - Google Patents

Unité de filtration sur membrane de type à immersion et appareil de filtration sur membrane de type à immersion Download PDF

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Publication number
WO2012008115A1
WO2012008115A1 PCT/JP2011/003819 JP2011003819W WO2012008115A1 WO 2012008115 A1 WO2012008115 A1 WO 2012008115A1 JP 2011003819 W JP2011003819 W JP 2011003819W WO 2012008115 A1 WO2012008115 A1 WO 2012008115A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixing member
membrane
hollow fiber
filtration
lower fixing
Prior art date
Application number
PCT/JP2011/003819
Other languages
English (en)
Japanese (ja)
Inventor
康二 福本
茂英 平田
津澤　正樹
昭彦 猪俣
洋士 山本
Original Assignee
川崎重工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 川崎重工業株式会社 filed Critical 川崎重工業株式会社
Priority to CN2011800280030A priority Critical patent/CN103118769A/zh
Priority to JP2012524417A priority patent/JPWO2012008115A1/ja
Publication of WO2012008115A1 publication Critical patent/WO2012008115A1/fr

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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
    • B01D63/026—Wafer type modules or flat-surface type modules
    • 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
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/54—Modularity of membrane module elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2315/00—Details relating to the membrane module operation
    • B01D2315/06—Submerged-type; Immersion type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
    • B01D2321/18—Use of gases
    • B01D2321/185—Aeration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • C02F3/1273—Submerged membrane bioreactors
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention relates to an immersion type membrane filtration unit and an immersion type membrane filtration device, and more specifically, an immersion type membrane filtration unit that achieves miniaturization and energy saving while maintaining the efficiency of scrubbing cleaning with bubbles, and the same.
  • the present invention relates to a submerged membrane filtration apparatus.
  • a filtration device comprising a submerged membrane filtration unit using a hollow fiber membrane effective for filtration of suspended matters in water and removal of impurities. It is becoming.
  • devices using hollow fiber membranes are used for the purpose of separating and removing yeasts used for fermentation and concentrating liquids. By using these devices that use hollow fiber membranes, water can be regenerated, filtered, concentrated, etc. with less energy, attracting attention from the standpoint of preventing global warming through recent energy savings. ing.
  • such a submerged membrane filtration unit has a filtration membrane module 10 in which a number of hollow fiber membranes 11 are bundled and fixed in a planar shape between an upper fixing member 21 and a lower fixing member 22.
  • the filtration unit 1 is configured by using a plurality of the filtration membrane modules 10.
  • FIG. 3A schematically shows the filtration unit 1 including the filtration membrane module 10, and several filtration membrane modules 10 shown in FIG. 3B are housed inside the surrounding casing 14. Yes.
  • the filtration membrane modules 10 are arranged at regular intervals.
  • An aeration pipe 16 for supplying air bubbles for aeration is provided between the filtration membrane modules 10 at the lower part of the surrounding casing 14. Air bubbles from the aeration pipe 16 cause a water flow to flow upward from the lower side in the surrounding casing 14 and air scrubbing cleaning of the hollow fiber membrane 11 is performed.
  • Such a filtration unit 1 is immersed in the water tank which stores sewage, such as sludge water, individually or in a line. The water contained in the sewage passes through the tube walls of the numerous hollow fiber membranes 11 of the filtration membrane module 10 to become purified treated water. The treated water after purification is collected and reused.
  • Patent Document 1 In order to improve the efficiency of air scrubbing cleaning, through holes are provided in the upper and lower bonding parts for fixing the hollow fiber membrane (Patent Document 1), and the packing density of the bundle of hollow fiber membranes is lowered during the membrane cleaning (patent Reference 2) has been studied, but the actual situation is that the aeration power during cleaning has not been sufficiently reduced.
  • the interval between adjacent filtration membrane modules 10 is reduced. It is possible to set.
  • the installation area (horizontal cross-sectional area) of the filtration unit 1 is reduced and the density per unit installation area of the hollow fiber membrane 11 is increased, so that the aeration efficiency is improved even with the same aeration air volume. As a result, the aeration power at the time of air scrubbing cleaning can be reduced.
  • the interval between the filtration membrane modules 10 is set to be extremely small, bubbles supplied from the aeration pipe 16 do not rise between the filtration membrane modules 10 and rise between the surrounding casing 14 and the filtration membrane module 10. In addition, the air bubbles pass outside the outer casing 14 and the effect of air scrubbing cleaning is greatly reduced. In addition, contaminants present in the sewage may be entangled with the upper and lower fixing members 21 and 22 and the hollow fiber membrane 11 to prevent scrubbing cleaning and cause troubles such as poor cleaning. In order to remove such impurities, the sewage is usually supplied to the filtration device after passing through a bar screen having an interval of about 1 mm in advance.
  • the scrubbing cleaning is hindered by being entangled with the fixing members 21 and 22 and the hollow fiber membrane 11 depending on the interval between the filtration membrane modules 10. Become. Considering this, the distance between the filtration membrane modules 10 is set to a value larger than necessary, such as about 12 mm. Therefore, a large amount of air is required for air scrubbing cleaning, and the effect of reducing aeration power is greatly increased. The fact is that we cannot do it.
  • the present invention provides a filtration membrane module in which a bundle of a large number of hollow fiber membranes is fixed between the upper fixing member and the lower fixing member in a plane, without interfering with the effect of the air scrubbing cleaning. It is an object of the present invention to reduce the size of the filtration membrane unit and reduce the aeration power in the membrane filtration to save energy by setting the interval between the two to be small.
  • the submerged membrane filtration unit includes a plurality of filtration membrane modules in which a bundle of a plurality of hollow fiber membranes is fixed in a plane between an upper fixing member and a lower fixing member, and a surrounding that surrounds the plurality of filtration membrane modules.
  • a submerged membrane filtration unit having a casing and an aeration pipe for supplying air bubbles from below the plurality of filtration membrane modules, wherein an interval between adjacent filtration membrane modules is in a range of 3 to 7 mm. To do.
  • the hollow fiber membrane oscillates greatly as the slack of the hollow fiber membrane increases, it is considered that the effect of the air scrubbing washing increases as the slack increases.
  • the slack of the hollow fiber membrane is too large, as shown in FIG. 2, the water flow generated by the bubbles is displaced to the side of the filtration membrane module 10 as indicated by the arrow 24, and the region indicated by reference numeral 25 in FIG. 2. Then the water flow becomes weak. As a result, the effect of air scrubbing cleaning is reduced, and dirt such as sludge remains without being cleaned. This soil grows further and eventually impedes filtration.
  • the hollow fiber membrane is moderately slack. Moreover, it is preferable that the looseness of the hollow fiber membrane is smaller as the distance between the upper fixing member and the lower fixing member is larger.
  • the distance between the upper fixing member and the lower fixing member is D
  • the length of the hollow fiber membrane fixed between the upper fixing member and the lower fixing member is L
  • 500 mm ⁇ In the case of D ⁇ 1000 mm, D / L ⁇ 0.96 is preferable, and in the case of 1000 mm ⁇ D ⁇ 1500 mm, D / L ⁇ 0.97 is preferable, and 1500 mm ⁇ D ⁇ 2000 mm.
  • D / L ⁇ 0.98 is preferable, and in the case of 2000 mm ⁇ D ⁇ 3000 mm, D / L ⁇ 0.99 is preferable.
  • the value of 2b + c represents the distance between the hollow fiber membranes of adjacent submerged membrane filtration units when the hollow fiber membrane is not slack.
  • the submerged membrane filtration apparatus of the present invention is characterized by comprising a plurality of any of the submerged membrane filtration units described above.
  • the closest distance between the fixing positions of the hollow fiber membranes of adjacent filtration membrane modules is set in the range of 3 to 7 mm, so that a plurality of bubbles are supplied from the aeration pipe.
  • the air membrane scrubbing cleaning effect is not hindered.
  • the entanglement of the foreign matter into the hollow fiber membrane does not occur.
  • the cross-sectional area can be made smaller than that of a conventional submerged membrane filtration unit, it is possible to reduce aeration power during air scrubbing cleaning.
  • FIG. 3 is a perspective view showing a state in which a water flow for scrubbing and washing a hollow fiber membrane is deflected to the side in a filtration membrane module in which hollow fiber membranes are arranged in a plane.
  • A is a perspective view which shows typically the filtration unit 1 provided with the filtration membrane module 10
  • (b) is a perspective view which shows typically the inside which removed the outer surrounding casing 14 in (a).
  • FIG. 4 is a cross-sectional view of the submerged membrane filtration unit according to the embodiment of the present invention taken along line PP in FIG. 3.
  • FIG.4 It is sectional drawing which shows the fixing position of the hollow fiber membrane in the lower side fixing member of the immersion type membrane filtration unit of FIG. It is a figure which shows the test result which actually performed sewage treatment using the immersion type membrane filtration unit shown in FIG.4 and FIG.5.
  • the submerged membrane filtration unit 1 has a schematic configuration similar to that of FIG. 3 described above, and includes a plurality of filtration membrane modules 10 schematically shown in the perspective view of FIG.
  • a bundle of a large number of hollow fiber membranes 11 is fixed between the upper fixing member 21 and the lower fixing member 22, and the upper fixing member 21 and the lower fixing member 22 are composed of two support columns. 26 is held and fixed at a constant distance.
  • the hollow fiber membrane 11 is a hollow fine thread having a filtration membrane as a tube wall, and sewage is filtered when passing from the outside to the inside of the hollow fiber membrane 11.
  • FIG. 4 is a cross-sectional view taken along the line PP of the submerged membrane filtration unit 1 shown in FIG. Although three filtration membrane modules 10 are depicted in FIG. 4, the actual submerged membrane filtration unit 1 has about 50 filtration membrane modules 10.
  • a membrane unit SADF1590R manufactured by Mitsubishi Rayon Engineering Co., Ltd. was used as the filtration membrane module 10.
  • the hollow fiber membrane 11 is slackened between the upper fixing member 21 and the lower fixing member 22.
  • the scrubbing can be cleaned appropriately by aeration.
  • the hollow fiber membrane 11 can be continuously filtered without being clogged.
  • FIG. 5 shows the arrangement of the lower fixing member 22 in the lower part of the submerged membrane filtration unit 1.
  • the hollow fiber membrane 11 does not exist in the 5 mm portion.
  • the distance c between adjacent lower fixing members 22 is set to 5 mm. In such an arrangement, the distance 2b + c between the hollow fiber membranes of adjacent submerged membrane filtration units when the hollow fiber membrane is not slack is 15 mm.
  • the sewage filtration test was actually performed using the submerged membrane filtration unit 1 of FIG. 5 having such an arrangement, and the result is shown in FIG.
  • the horizontal axis represents the number of days from the start of the test.
  • the filtration flux is set to a constant value of about 0.6 m / d, and the aeration air volume is adjusted so that the superficial velocity in the filtration unit is the same.
  • the ratio of the aeration air volume of the submerged membrane filtration unit of the present invention when the aeration air volume was 1 was measured.
  • the filtration differential pressure is a measured value that serves as an index of dirt (clogging) of the hollow fiber membrane 11 due to filtration, and the filtration differential pressure increases as the dirt of the hollow fiber membrane 11 increases.
  • the ratio of the aeration air volume of the submerged membrane filtration unit of the present invention to the aeration air volume of the conventional submerged membrane filtration apparatus is about 0.84. It can be seen that the aeration power is reduced. Moreover, regarding the behavior of the filtration differential pressure, the air scrubbing cleaning effect was not reduced due to the reduction of the aeration air volume, and the same result as the conventional apparatus was obtained. Furthermore, during this test, in any of the conventional and submerged membrane filtration devices of the present invention, no entanglement of impurities on the upper fixing member 21, the lower fixing member 22, and the hollow fiber membrane 11 was observed.
  • the submerged membrane filtration unit 1 using three filtration membrane modules 10 has been described, but it goes without saying that more filtration membrane modules 10 are used in an actual apparatus. Further, the size of the filtration membrane module 10, in other words, the number and length of the hollow fiber membranes 11 can be changed according to the purpose of use.
  • the submerged membrane filtration unit of the present invention is used in water treatment such as drinking water production, water purification treatment, wastewater treatment, etc., especially in the field of water treatment using MBR (Membrane Bioreactor, membrane separation activated sludge method) Available in the field.
  • MBR Membrane Bioreactor, membrane separation activated sludge method

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

Abstract

L'invention concerne une unité de filtration sur membrane de type à immersion comprenant un module de membrane de filtration dans lequel un faisceau de plusieurs membranes à fibres creuses est fixé de manière planaire entre des éléments de fixation supérieure et des éléments de fixation inférieure, où le module de membrane de filtration (10) de l'unité de membrane de type à immersion est placé comme expliqué ci-dessous pour réduire la puissance pour l'aération sans entraver l'effet de nettoyage par lavage à l'air. Dans le module de membrane de filtration (10), les éléments de fixation supérieure (21) et les éléments de fixation inférieure (22) fixant les membranes à fibres creuses (11) sont séparés par une distance (D) de 1150 mm, la longueur maximum (L) des membranes à fibres creuses (11) est de 1185 mm, l'épaisseur (d) d'une pluralité des éléments de fixation inférieure (22) fixant les membranes à fibres creuses (11) est de 30 mm, et le faisceau des membranes à fibres creuses (11) est fixé, avec une largeur (a) d'approximativement 20 mm, dans le centre dans la direction de l'épaisseur des éléments de fixation inférieure (22). Les deux portions latérales où les membranes à fibres creuses (11) n'existent pas dans la direction d'épaisseur des éléments de fixation inférieure (22) ont une largeur (b) de 5 mm, et en outre les éléments de fixation inférieure (22) qui sont adjacents les uns aux autres sont séparés par une distance (c) de 3 mm à 7 mm.
PCT/JP2011/003819 2010-07-13 2011-07-04 Unité de filtration sur membrane de type à immersion et appareil de filtration sur membrane de type à immersion WO2012008115A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2011800280030A CN103118769A (zh) 2010-07-13 2011-07-04 浸渍型膜过滤单元及浸渍型膜过滤装置
JP2012524417A JPWO2012008115A1 (ja) 2010-07-13 2011-07-04 浸漬型膜濾過ユニット及び浸漬型膜濾過装置

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Application Number Priority Date Filing Date Title
JP2010158440 2010-07-13
JP2010-158440 2010-07-13

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WO2012008115A1 true WO2012008115A1 (fr) 2012-01-19

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013187513A1 (fr) * 2012-06-15 2013-12-19 旭化成ケミカルズ株式会社 Unité à membrane immergée
CN105597545A (zh) * 2012-04-02 2016-05-25 三菱丽阳株式会社 中空纤维膜组件的制造方法和具有中空纤维膜组件的中空纤维膜单元
WO2016171011A1 (fr) * 2015-04-24 2016-10-27 住友電気工業株式会社 Dispositif de filtration
WO2016181803A1 (fr) * 2015-05-11 2016-11-17 住友電気工業株式会社 Dispositif de filtration
WO2016199440A1 (fr) * 2015-06-08 2016-12-15 住友電気工業株式会社 Dispositif de filtration

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180052732A (ko) * 2015-11-10 2018-05-18 미쯔비시 케미컬 주식회사 막 여과 유닛 및 수처리 방법
CN112957827B (zh) * 2021-01-27 2023-04-18 浙江东大环境工程有限公司 一种聚四氟乙烯中空纤维膜空气过滤装置

Citations (2)

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Publication number Priority date Publication date Assignee Title
JPH08257372A (ja) * 1995-03-22 1996-10-08 Mitsubishi Rayon Eng Co Ltd 中空糸膜モジュール組立体
JPH10146520A (ja) * 1996-11-20 1998-06-02 Kurita Water Ind Ltd 浸漬型膜分離装置

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EP0598909B1 (fr) * 1992-02-12 1998-01-14 Mitsubishi Rayon Co., Ltd. Module de membranes a fils creux
US6656356B2 (en) * 1998-10-09 2003-12-02 Zenon Environmental Inc. Aerated immersed membrane system
JPH10263371A (ja) * 1997-03-28 1998-10-06 Yuasa Corp 浸漬型濾過膜エレメント
DE60141353D1 (de) * 2000-12-18 2010-04-01 Mitsubishi Rayon Co Hohlfasermembranmodul und verfahren zu dessen herstellung
JP2007044666A (ja) * 2005-08-12 2007-02-22 Toray Ind Inc 中空糸膜モジュール
CN1951547A (zh) * 2005-10-21 2007-04-25 天津工业大学 帘式中空纤维膜组件

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08257372A (ja) * 1995-03-22 1996-10-08 Mitsubishi Rayon Eng Co Ltd 中空糸膜モジュール組立体
JPH10146520A (ja) * 1996-11-20 1998-06-02 Kurita Water Ind Ltd 浸漬型膜分離装置

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105597545A (zh) * 2012-04-02 2016-05-25 三菱丽阳株式会社 中空纤维膜组件的制造方法和具有中空纤维膜组件的中空纤维膜单元
EP2835174A4 (fr) * 2012-04-02 2016-08-03 Mitsubishi Rayon Co Module membranaire à fibres creuses ainsi que procédé de fabrication de celui-ci, et unité membranaire à fibres creuses équipée de ce module
WO2013187513A1 (fr) * 2012-06-15 2013-12-19 旭化成ケミカルズ株式会社 Unité à membrane immergée
WO2016171011A1 (fr) * 2015-04-24 2016-10-27 住友電気工業株式会社 Dispositif de filtration
WO2016181803A1 (fr) * 2015-05-11 2016-11-17 住友電気工業株式会社 Dispositif de filtration
WO2016199440A1 (fr) * 2015-06-08 2016-12-15 住友電気工業株式会社 Dispositif de filtration

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CN103118769A (zh) 2013-05-22
JPWO2012008115A1 (ja) 2013-09-05

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