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WO2013035928A1 - Dispositif de filtration à membrane sans stockage d'eau traitée et son procédé de lavage de membrane - Google Patents

Dispositif de filtration à membrane sans stockage d'eau traitée et son procédé de lavage de membrane Download PDF

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Publication number
WO2013035928A1
WO2013035928A1 PCT/KR2011/007692 KR2011007692W WO2013035928A1 WO 2013035928 A1 WO2013035928 A1 WO 2013035928A1 KR 2011007692 W KR2011007692 W KR 2011007692W WO 2013035928 A1 WO2013035928 A1 WO 2013035928A1
Authority
WO
WIPO (PCT)
Prior art keywords
backwash
water
membrane
valve
filtration
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2011/007692
Other languages
English (en)
Korean (ko)
Inventor
김관엽
김현배
윤희철
남해욱
고주형
김윤중
한현
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KYUNG IL WATER TREATMENT CO Ltd
Posco Engineering and Construction Co Ltd
Original Assignee
KYUNG IL WATER TREATMENT CO Ltd
Posco Engineering and Construction Co Ltd
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 KYUNG IL WATER TREATMENT CO Ltd, Posco Engineering and Construction Co Ltd filed Critical KYUNG IL WATER TREATMENT CO Ltd
Publication of WO2013035928A1 publication Critical patent/WO2013035928A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • 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
    • 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
    • B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2317/00—Membrane module arrangements within a plant or an apparatus
    • B01D2317/04—Elements in parallel
    • 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
    • B01D2321/04—Backflushing

Definitions

  • the present invention relates to a membrane filtration device without a treated water storage tank and a membrane washing method thereof, and more particularly, to a membrane filtration device which is treated in a membrane filtration process without a separate treated water storage tank for backwashing the membrane and storing the filtered water.
  • the present invention relates to a membrane filtration apparatus without a treated water storage tank using a portion of the filtered water as a backwash water of a separation membrane, and a membrane washing method thereof.
  • the separation membrane In the membrane filtration process, which is a kind of water treatment, the separation membrane has pores formed on the surface thereof, thereby removing contaminants, thereby purifying water.
  • contaminants excluded by the use of the membrane are deposited on the surface of the membrane or the pores are blocked, resulting in a decrease in filtration performance.
  • backwashing is performed through a part of the filtrate periodically in the reverse direction of the filtration for several seconds to several tens of seconds after several minutes to several tens of minutes of operation.
  • the membrane filtration process for water treatment a certain amount of treated water is stored, and after filtering for a predetermined time, the filtered water is permeated in the reverse direction of the membrane filtration using a pump to remove and remove particulate matter deposited on the surface of the membrane or blocking pores. As a result, the filtration performance is restored.
  • the present invention has been made to solve the above-mentioned conventional problems, it is possible to remove the treated water storage tank in the membrane filtration device and thereby increase the space efficiency, which may occur due to the retention in the treated water storage tank of the filtered water It can prevent the backwash water pollution, prevent the recontamination of the membrane by the contaminated backwash water, improve the washing efficiency of the membrane, and do not need the driving equipment to supplement the driving pressure required for the aftertreatment process. It is an object of the present invention to provide a membrane filtration apparatus without a treated water storage tank and a membrane washing method thereof, which can increase the energy efficiency of a process.
  • the present invention for achieving the above object is a membrane filtration device for branching the supply water and filtering by the separation membrane, a plurality of filtration pumps for supplying each of the branched supply water; A plurality of separator filters for filtering the feed water pumped by the respective filtration pumps by a separator; A plurality of filtrate valves for opening and closing the discharge of the filtrate treated in each of the separator filters; A backwash valve installed downstream of the filtrate valve to open and close a counter flow of the filtrate so that a part of the filtered filtrate is returned to the separator filter to backwash the separator; A backwash pump pumping the backwash water flowed back by the backwash valve and branching to each of the separator filters; And a plurality of backwash water valves for opening and closing the supply of backwash water branched by the backwash pump, respectively.
  • cleaning agent injector which injects a washing
  • an input amount control valve is provided so that the input amount of the said washing
  • the filtration pump connected to any one of the plurality of separation membrane filters is stopped, the filtration water valve is closed, the backwash water valve is opened, and the filtration pump connected to the remaining separation membrane filter is operated. Open the filtrate valve and close the backwash valve.
  • the membrane cleaning method of the membrane filter apparatus described above comprising: stopping the filtration pump connected to any one of the plurality of membrane filters and closing the filtrate valve; Operating a filtration pump connected to the remainder of the plurality of separator filters and opening the filtrate valve; Opening the backwash valve and operating a backwash pump to backflow the filtrate of the membrane filter; And opening the backwash water valve connected to the separator filter in which the filtration pump is stopped and closing the remaining backwash valve.
  • the present invention is characterized in that it further comprises the step of introducing a cleaning agent to the backwash water between the backflow step of the filtered water and the opening step of the backwash water valve.
  • the present invention uses a portion of the filtered water filtered in the membrane filtration process as the backwash water of the separation membrane, thereby removing the treated water storage tank from the membrane filtration device, thereby providing an effect of increasing space efficiency. do.
  • FIG. 1 is a block diagram showing a membrane filter apparatus without a treated water storage tank according to an embodiment of the present invention.
  • Figure 2 is a process state showing the filtration step of the membrane filter apparatus without the treated water storage tank according to an embodiment of the present invention.
  • FIG. 3 is a process state diagram showing a backwashing process of a membrane filtration apparatus without a treated water storage tank according to one embodiment of the present invention
  • Figure 4 is a comparison graph showing the driving pressure of the membrane filter device and the conventional membrane filter device according to an embodiment of the present invention.
  • FIG. 5 is a flowchart illustrating a membrane cleaning method of a membrane filtration apparatus without a treated water storage tank according to an embodiment of the present invention.
  • FIG. 1 is a block diagram showing a membrane filter apparatus without a treated water storage tank according to an embodiment of the present invention
  • Figure 2 is a process showing a filtration process of the membrane filter apparatus without a treated water storage tank according to an embodiment of the present invention
  • 3 is a process state diagram showing a backwashing process of a membrane filter apparatus without a treated water storage tank according to an embodiment of the present invention
  • FIG. 4 is a membrane filter apparatus and a conventional membrane according to an embodiment of the present invention. It is a comparative graph which shows the drive pressure of a filtration apparatus
  • FIG. 5 is a flowchart which shows the membrane washing
  • the membrane filtration apparatus without the treated water storage tank of this embodiment includes filtration pumps 11, 12, 13, membrane filters 21, 22, 23, filtrate valves 31, 32, 33, and backwashing. It comprises a valve 60, backwash pump 50, backwash water valves (41, 42, 43) is a membrane filtration device for branching the feed water is filtered by the separation membrane.
  • Filtration pumps (11, 12, 13) are installed in the branched branch pipe to supply the feed water to each of the membrane filter (21, 22, 23) in the reservoir of the feed water, thus pumping the branched feed water respectively To each of the separator filters (21, 22, 23).
  • Filtration pumps (11, 12, 13) of the present embodiment. It consists of three filtration pumps of the first filtration pump 11, the second filtration pump 12, the third filtration pump 13, but of course it is also possible to consist of two or four or more filtration pumps.
  • Membrane filters 21, 22, 23 are installed in inlet pipes downstream of each filtration pumps 11, 12, 13, and feed water pumped by the respective filtration pumps 11, 12, 13 to the membrane. By filtering by means of filtering the contaminants contained in the feed water, the contaminant is discharged to the filtered filtered water downstream.
  • the membrane filter 21, 22, 23 of the present embodiment Three membrane filters of the first membrane filter 21, the second membrane filter 22, and the third membrane filter 23, but of course two or four or more of the filtration pump is also possible.
  • Filtrate valves 31, 32, 33 are installed in the discharge pipe downstream of each membrane filter 21, 22, 23, and discharge pipe to control the discharge of the filtered water treated in each membrane filter 21, 22, 23. Will be opened and closed.
  • Filtrate valves 31, 32 and 33 of the present embodiment are composed of three filtrate valves, but two or four or more filtrate valves may be possible.
  • the backwash valve 60 is installed in a backflow pipe connected to a conduit pipe joining the respective discharge pipes downstream of each of the filtrate valves 31, 32, and 33, and a portion of the filtrate water joined in the conduit pipe is connected to the backflow pipe.
  • the backwash pump 50 is installed downstream of the backwash valve 60, and pumps backwash water backflowed into the backflow pipe by the backwash valve 60, and is connected to each of the separator filters 21, 22, and 23. It will be branched and fed to the reverse branch office.
  • the backwash water valves 41, 42, and 43 are respectively installed in respective backwash engines connected to the respective separator filters 21, 22, and 23, respectively, to supply the backwash water branched by the backwash pump 50.
  • the subdivision engine is opened and closed for control.
  • the backwash water valves 41, 42 and 43 of the present embodiment consists of three backwash water valves: a first backwash water valve 41, a second backwash water valve 42, and a third backwash water valve 43, but with two or four backwash water valves, similar to a separator filter. Of course, it is possible.
  • the cleaning agent is introduced into the backwash water flowed back to each of the separator filters (21, 22, 23) between the backwash pump (50) and the backwash water valves (41, 42, 43).
  • the detergent injector 70 is connected and installed.
  • the cleaning agent is introduced into the backwashing water during the backwashing of the separators of each of the separator filters 21, 22, and 23 by the detergent injector 70, thereby improving the backwashing efficiency of the separator.
  • the input amount control valve 71 is installed in the detergent input unit 70 so as to adjust the input amount of the detergent according to the flow rate of the backwash water flowing back to each of the membrane filters 21, 22, and 23.
  • each filtration pump 11, 12, 13 connected to each separation membrane filter 21, 22, 23 is operated, and each filtrate valve 31 is carried out. , 32, 33) to discharge the filtered water to the subsequent process.
  • each of the backwash water valves 41, 42, and 43 connected to each of the separator filters 21, 22, and 23 is closed, the backwash valve 60 is closed, and the backwash pump 50 is stopped to remove the filtered water. It will block backflow.
  • the first filtration pump 11 connected to the first membrane filter 21 among the plurality of membrane filters 21, 22, 23 is stopped and the first filter pump 11 is stopped. 1 Closes the filtrate valve 31 and opens the first backwash valve 41, and the second filtration pump 12 and the third filtration connected to the second separator 22 and the third separator 23.
  • the pump 13 is operated, the second filtered water valve 32 and the third filtered water valve 33 are opened, and the second backwash water valve 42 and the third backwash water valve 43 are closed.
  • the backwash valve 60 is opened and the backwash pump 50 is operated so that a part of the filtered water discharged from the second separator 22 and the third separator 23 is flowed back to the first separator 21.
  • the cleaning agent is introduced into the backwashing water by the cleaning agent injector 70 to backwash the separation membrane of the first separation membrane filter 21.
  • each backwash water is maintained at 0.5 to 5 times the filtration flux, and the backwash time is preferably 10 seconds to 2 minutes, and the pressure of the backwash water is maintained at 1 to 5 times the intermembrane pressure of the membrane filter. It is desirable to.
  • the membrane filter device of the present embodiment does not supply the backwash water from the treated water storage tank for separately storing the filtered water at the time of backwashing of the separation membrane, and by backwashing the separation membrane by backflowing a part of the filtered water discharged in a subsequent process to the separation membrane filter,
  • the space efficiency of the membrane filtration system can be improved by removing the space for the separate treatment water storage tank, and since part of the filtered water is directly used as the backwash water of the membrane during the membrane filtration process, it may be caused by the retention of the treated water storage tank of the filtered water. By preventing contamination, it is possible to prevent re-contamination of the membrane by back washing of contaminated filtered water and improve washing efficiency.
  • the present embodiment after the membrane is a feed-side drive pressure of the filtration device (P in1) decreases the exhaust side drive pressure (P out1), a small amount of the membrane filtration device as the progress of filtration of the membrane filtration device of the It is used as it is the supply side drive pressure P in2 of the treatment section and is maintained up to the discharge side drive pressure P out2 of the post treatment section.
  • the supply pressure P in1 of the membrane filter device of the conventional example (fine solid line) is discharged to the discharge side P of the membrane filter device as the filtered water is discharged after being stored in the treated water reservoir in the filtration process of the membrane filter device. out1 ) is lost and excessive pressure loss ( ⁇ P loss ) occurs between the membrane filter unit and the aftertreatment unit.
  • the conventional example membrane filtration apparatus just the exhaust side drive pressure (P out1) adding the drive of, for use as a feed-side drive pressure (P in2) of the processing unit then to compensate for the loss of pressure drop ( ⁇ P loss) from the filtration device the need for additional power for the pressure ( ⁇ P add), but it uses the present embodiment the membrane filtration unit is the exhaust side drive pressure (P out1) supply-side drive pressure (P in2) of the processing unit after the membrane filtration unit, No additional power is needed to compensate for the pressure loss, which improves the energy efficiency of the membrane filter.
  • the membrane cleaning method of the membrane filter device of the present embodiment is part of the filtered water closing step (S10), the remaining filtered water opening step (S20), filtrate backflow step (S30), washing agent input step ( S40), and part of the backwash water opening and the remaining backwash water closing step (S50) is made to backwash the separation membrane of some of the membrane filter.
  • the second filtration pump 12 and the third filtration pump 13 connected to the second separator 22 and the third separator 23 are operated, and the second filter valve ( 32 and the third filtrate valve 33 are opened.
  • the backwash valve 60 is opened and the backwash pump 50 is operated so that a part of the filtered water discharged from the second separator 22 and the third separator 23 is separated from the first separator. 21) reversed
  • the cleaning agent is introduced by the cleaning agent injector 70 into the backwash water in which the filtrate is counterflowed to the first separator filter 21.
  • the first backwash water valve 41 connected to the first separator filter 21 is opened, and the second backwash valve 42 and the third backwash valve are opened. Closing the 43, the backwash water is supplied only to the first separator filter 21 to backwash the separator of the first separator filter 21.
  • the treated water storage tank can be removed from the membrane filtration device, thereby providing an effect of improving space efficiency. do.
  • the present invention provides a membrane filter apparatus without a treated water storage tank using a portion of the filtered water treated in the membrane filtration process as a backwash water of the membrane without providing a separate treated water storage tank for membrane backwashing and filtered water storage in the membrane filtration apparatus.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

La présente invention porte sur un dispositif de filtration à membrane sans stockage d'eau traitée, lequel dispositif comprend une pluralité de pompes de filtration pour fournir de l'eau d'alimentation, un filtre à membrane de séparation pour filtrer l'eau d'alimentation par une membrane de séparation, une vanne d'eau filtrée pour réguler la décharge d'eau filtrée, une vanne de lavage à contre-courant pour réguler le lavage à contre-courant de l'eau filtrée, une pompe de lavage à contre-courant pour distribuer l'eau de lavage à contre-courant à un filtre à membrane de séparation, et une vanne d'eau de lavage à contre-courant régulant l'alimentation en eau de lavage à contre-courant. Par conséquent, la présente invention empêche une recontamination d'une membrane de séparation due à un lavage à contre-courant par amélioration de l'efficacité spatiale du dispositif de filtration à membrane et inhibition d'une contamination provoquée par une eau filtrée restante, et améliore un rendement en énergie par réduction d'une énergie d'actionnement d'un processus de post-traitement.
PCT/KR2011/007692 2011-09-09 2011-10-17 Dispositif de filtration à membrane sans stockage d'eau traitée et son procédé de lavage de membrane Ceased WO2013035928A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR20110091725 2011-09-09
KR10-2011-0091725 2011-09-09

Publications (1)

Publication Number Publication Date
WO2013035928A1 true WO2013035928A1 (fr) 2013-03-14

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PCT/KR2011/007692 Ceased WO2013035928A1 (fr) 2011-09-09 2011-10-17 Dispositif de filtration à membrane sans stockage d'eau traitée et son procédé de lavage de membrane

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KR (1) KR101264321B1 (fr)
WO (1) WO2013035928A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101461878B1 (ko) 2013-03-18 2014-11-14 현대자동차 주식회사 운전자의 장기 운전 성향을 판단하는 장치 및 방법
KR101496729B1 (ko) * 2014-01-07 2015-03-02 주식회사 포스코건설 ２단 막여과장치 및 이를 이용한 수처리방법
KR101481075B1 (ko) * 2014-02-20 2015-01-13 주식회사 포스코건설 침지식 연속유동 막여과장치 및 그의 역세척방법
KR101725285B1 (ko) * 2015-10-01 2017-04-10 주식회사 포스코건설 순차대기형 막여과장치 및 그의 막여과방법

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002346348A (ja) * 2001-05-28 2002-12-03 Kurita Water Ind Ltd 膜濾過装置
JP2008246302A (ja) * 2007-03-29 2008-10-16 Kurita Water Ind Ltd 膜濾過装置の運転方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000210543A (ja) * 1999-01-25 2000-08-02 Ishikawajima Shibaura Mach Co Ltd 濾過装置
JP3598912B2 (ja) * 1999-11-16 2004-12-08 栗田工業株式会社 膜分離装置の運転方法
JP2007152271A (ja) * 2005-12-07 2007-06-21 Kobelco Eco-Solutions Co Ltd 水処理システム及びその運転方法

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002346348A (ja) * 2001-05-28 2002-12-03 Kurita Water Ind Ltd 膜濾過装置
JP2008246302A (ja) * 2007-03-29 2008-10-16 Kurita Water Ind Ltd 膜濾過装置の運転方法

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KR101264321B1 (ko) 2013-05-27

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