WO2023176465A1 - Système de filtration - Google Patents

Système de filtration Download PDF

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Publication number
WO2023176465A1
WO2023176465A1 PCT/JP2023/007721 JP2023007721W WO2023176465A1 WO 2023176465 A1 WO2023176465 A1 WO 2023176465A1 JP 2023007721 W JP2023007721 W JP 2023007721W WO 2023176465 A1 WO2023176465 A1 WO 2023176465A1
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WO
WIPO (PCT)
Prior art keywords
water collection
pipe
filtration membrane
filtration
individual
Prior art date
Application number
PCT/JP2023/007721
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English (en)
Japanese (ja)
Inventor
彰利 中川
直樹 加藤
Original Assignee
株式会社明電舎
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 株式会社明電舎 filed Critical 株式会社明電舎
Publication of WO2023176465A1 publication Critical patent/WO2023176465A1/fr

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    • 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
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/18—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
    • 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

Definitions

  • the present invention relates to a filtration system.
  • a plurality of filtration membrane units each having a filtration membrane and a discharge port for discharging a filtrate obtained by the filtration membrane are provided, and the filtration membrane unit is arranged in the axial direction of the main pipe part and communicates with the main pipe part.
  • Filtration systems include a collection pipe with a plurality of individual collection channels.
  • a membrane module unit as a filtration system described in Patent Document 1 includes a plurality of membrane modules as filtration membrane units and a water collection header as a water collection pipe.
  • the water collection header includes a cylindrical portion serving as a main pipe portion, and a plurality of intermediate connecting portions (individual water collection channels) that communicate with the cylindrical portion from the radial direction of the cylindrical portion and are lined up in the axial direction of the cylindrical portion.
  • the membrane module includes a flat filtration membrane (hollow fiber membrane sheet) and a housing fixed to each of both ends of the filtration membrane in the longitudinal direction.
  • a water intake port serving as a drainage port is arranged at one end of the filtration membrane in the short direction of the housing at both ends.
  • the water intakes are individually connected by pipes to one of a plurality of intermediate connections in the water collection header.
  • a suction force is generated by the power of a pump, etc. on the filtration membrane of each membrane module through the cylindrical part of the water collection header and the intermediate connection part, the water in the sludge existing around the filtration membrane flows into the filtration membrane as filtrate. be sucked inside.
  • the sucked filtrate is collected in the cylindrical portion of the water collection header via the water intake port of the housing of the membrane module, the pipe connected thereto, and the intermediate connection portion of the water collection header.
  • Patent Document 1 does not specifically describe how the plurality of intermediate connection parts of the water collection header and the pipes extending from the water intake ports of the plurality of membrane modules are connected.
  • a male thread is depicted on the outer peripheral surface of the cylindrical intermediate connection part in the drawing, it is thought that a union joint that can be threaded onto this male thread is used for connection.
  • a union joint a female thread formed on the inner peripheral surface of a rotatable screw cup is screwed into a male thread on the outer peripheral surface of a pipe to be connected.
  • the screw cup of the union joint is rotated multiple times for each connection.
  • the present invention has been made in view of the above background, and its purpose is to provide a filtration system that can reduce the effort required for maintenance and inspection of a filtration membrane unit such as a filtration system. .
  • One aspect of the present invention includes a plurality of filtration membrane units each including a filtration membrane and a discharge port for discharging the filtrate obtained by the filtration membrane, and the filtration membrane units are arranged in the axial direction of the main pipe part and the main pipe part,
  • a water collection pipe is provided with a plurality of individual water collection channels communicating with the main pipe section, and the filtrate filtered by the filtration membrane in each of the plurality of filtration membrane units is passed through the individual water collection channels of the water collection pipe.
  • a filtration system that collects water in the main pipe of the water collection pipe, comprising a locking member that locks the axial movement of the discharge pipe in each of the plurality of filtration membrane units.
  • Each of them is provided with an O-ring made of an elastic material on the outer circumferential surface of the distal end of the discharge pipe, and when the discharge pipe is inserted into the individual water collection channel, the shaft of the discharge pipe is fixed by the locking member. It is characterized in that movement in the direction is locked.
  • FIG. 1 is a diagram showing a schematic configuration of a water treatment facility using a filtration system according to an embodiment. It is a perspective view showing a filtration membrane unit of the same filtration system.
  • FIG. 2 is a perspective view showing a water collection pipe installed in the filtration system. It is a sectional view showing the water collection pipe and a filtration membrane unit connected to its individual water collection channel. It is a figure which shows the same water collection pipe and the same filtration membrane unit from the axial direction of the main pipe part of a water collection pipe.
  • It is a perspective view showing a sealing plug. It is a sectional view showing a sealing plug just before being inserted into an individual water collection channel of a water collection pipe, and a water collection pipe.
  • FIG. 3 is a sectional view showing a sealing plug inserted into an individual water collection channel and a water collection pipe.
  • FIG. 3 is a cross-sectional view for explaining a preparation operation for pulling out the sealing plug.
  • FIG. 11 is a sectional view showing the sealing plug and the water collection pipe immediately after the extraction preparation operation has been performed. It is a sectional view showing a sealing plug in the middle of being pulled out, and a water collection pipe. It is a perspective view showing filtration processing equipment.
  • FIG. 1 is a diagram showing a schematic configuration of a water treatment facility that uses a filtration system according to an embodiment.
  • This water treatment facility includes a pre-treatment water tank 1, a filtered water tank 2, a treated water tank 3, a control device 4, a raw water pump 5, a first water level sensor 6, a raw water transfer pipe 7, a treated water transfer pipe 8, and a suction pump 9. , a second water level sensor 11, a third water level sensor 12, and the like.
  • the water treatment facility also includes a blower 13, an air supply pipe 14, a pedestal 15, a filtration system 20, a bubble generator 30, and the like.
  • pre-processing water (raw water) W1 as a liquid is stored.
  • a first water level sensor such as an ultrasonic sensor, installed in the pre-treatment water tank 1 detects the water level (water surface height) of the pre-treatment water W 1 in the pre-treatment water tank 1, and outputs the detection result to the water level. It is transmitted to the control device 4 as a signal.
  • a raw water pump 5 installed in the pre-treatment water tank 1 sucks and discharges the pre-treatment water W 1 in the pre-treatment water tank 1 and sends it to the filtration treatment water tank 2 through the raw water transfer pipe 7 .
  • a submersible pump is illustrated as the raw water pump 5, a land pump may also be used.
  • the filtration treatment water tank 2 is a water tank made of reinforced concrete.
  • a liquid filtration device 50 is installed in the filtration treatment water tank 2 .
  • the liquid filtration device 50 includes a pedestal 15, a filtration system 20, and a bubble generator 30, and is entirely immersed in the pre-treatment water W1 in the filtration treatment water tank 2.
  • the blower 13 discharges air as a gas sucked through the suction port to the air supply pipe 14 through the discharge port.
  • the air discharged into the air supply pipe 14 is supplied to the bubble generator 30 of the liquid filtration device 50.
  • the third water level sensor 12 installed in the filtration treatment tank 2 detects the water level of the pre-treatment water W1 in the filtration treatment tank 2, and transmits the detection result to the control device 4 as a water level signal.
  • the suction pump 9 sucks the untreated water W 1 in the filtration treatment water tank 2 via the treated water transfer pipe 8 and a filtration membrane installed in the filtration system 20 and described below.
  • the sucked untreated water W 1 is filtered by a filter membrane to become treated water W 2 , and then sent to the treated water tank 3 through the treated water transfer pipe 8 .
  • the second water level sensor 11 set in the treated water tank 3 detects the water level of the treated water W2 in the treated water tank 3, and transmits the detection result to the control device 4 as a water level signal.
  • suction pump 9 a pump that generates suction force using water head pressure may be used.
  • the means of suction is not particularly limited.
  • the control device 4 When the water level in the treated water tank 3 has not reached the upper limit and predetermined operation execution conditions are met, the control device 4 operates the suction pump 9 and the blower 13 to remove the pre-treatment water W1 . Execute the filtration process. However, even if the operation execution conditions are met, if the water level of the pre-treatment water W 1 in the pre-treatment water tank 1 is below the lower limit, or if the water level of the pre-treatment water W 1 in the filtration treatment water tank 2 is If it is below the lower limit, the control device 4 stops execution of the filtration process. Note that the role of the blower 13 will be described later.
  • FIG. 2 is a perspective view showing the filtration membrane unit 21.
  • the filtration membrane unit 21 includes a flat filtration membrane 22, a socket tube 16, and a sealing holder 17. This filtration membrane unit 21 is held by four holding members 24 of a frame, which will be described later.
  • a plate-shaped flat membrane is used as the filtration membrane 22, but the type of the filtration membrane 22 is not limited to a flat membrane, and may include other types such as a hollow fiber membrane. It may be a type.
  • the material of the filtration membrane 22 may be an organic material such as PVC (polyvinyl chloride) or PVDF (polyvinylidene fluoride), and is composed of one or more types of alumina, cordierite, silicon carbide, and other metal oxides. It can also be made of ceramic. Further, the filtration membrane 22 may be a composite membrane made of an organic membrane and a ceramic membrane.
  • PVC polyvinyl chloride
  • PVDF polyvinylidene fluoride
  • the filtration membrane 22 includes a plurality of hollow spaces 22a extending in the vertical direction. These hollow spaces 22a are arranged at predetermined intervals in the transverse direction of the filter membrane 22, and the upper end of the hollow spaces 22a is an opening facing "upward".
  • a socket pipe 16 is attached to one end of the filter membrane 22 in the longitudinal direction.
  • This socket pipe 16 has an inner space that communicates with the hollow space 22a of the filtration membrane 22, and receives the treated water (W 2 ) filtered by the filtration membrane 22 into the inner space.
  • One end of the socket pipe 16 in the longitudinal direction is a discharge pipe 16a that protrudes from the end of the filtration membrane 22.
  • This discharge pipe 16a has a discharge passage formed inside thereof, and is inserted into an individual water collection passage of a water collection pipe to be described later.
  • Two O-rings 16b are attached to the outer circumferential surface of the discharge pipe 16a and are arranged in the axial direction of the insertion section.
  • the O-ring 16b is made of an elastic material such as rubber or resin.
  • the suction pump (9 in FIG. 1) When the suction pump (9 in FIG. 1) operates, a suction force is generated on the surface of the filtration membrane 22, and the untreated water (W 1 in FIG. It is sucked into the hollow 22a through the hole. At this time, the pre-treatment water W 1 is filtered, and the pollutants in the pre-treatment water W 1 remain on the surface of the filter membrane 22 .
  • the treated water W 2 sucked into the hollow 22 a moves in the longitudinal direction within the hollow 22 a, flows into the interior of the socket pipe 16 , and is then discharged from the discharge pipe 16 a of the socket pipe 16 .
  • a bubble generator 30 installed below the filtration system 20 emits bubbles toward the filtration system 20 above.
  • the released bubbles float in the pre-treatment water W1 , reach the filtration membrane 22, are divided into a plurality of parts by the filtration membrane 22, and then enter the region between the adjacent filtration membranes 22.
  • the bubbles floating in this area violently shake the pre-treatment water W1 near the surface of the filtration membrane 22, causing the pollutants adhering to the surface of the filtration membrane 22 to separate from the surface.
  • FIG. 3 is a perspective view showing the water collection pipe 90 installed in the filtration system (20).
  • the water collection pipe 90 is made of a resin material such as polyethylene, polypropylene, polyvinyl chloride, or polyvinyl chloride by injection molding, and includes a cylindrical main pipe part 91 and a flat box-like water collection part 92. , and two rubber sheets 95.
  • the water collection section 92 includes a plurality of individual water collection channels 93 that are arranged in the axis (L1) direction of the main pipe section 91 and communicate with the main pipe section 91 from a direction perpendicular to the axis L1. As shown in the figure, the individual water collection channels 93 are provided on both sides of the water collection section 92 with the center line L2 of the main pipe section 91 as a border.
  • FIG. 4 is a sectional view showing the water collection pipe 90 and the filtration membrane unit 21 connected to its individual water collection channel 93. As illustrated, the discharge pipe 16a of the filtration membrane unit 21 is inserted into the individual water collection channel 93 of the water collection pipe 90. Since the O-ring 16b is interposed between the outer circumferential surface of the inserted discharge pipe 16a and the inner circumferential surface of the individual water collection channel 93, airtightness between the two is ensured.
  • the rubber sheet 95 of the water collection pipe 90 is for preventing the filtration membrane 22 of the filtration membrane unit 21 from directly hitting the main pipe portion 91 of the water collection pipe 90 when the filtration membrane unit 21 is attached to the water collection pipe 90. It is.
  • FIG. 5 is a diagram showing the water collection pipe 90 and the filtration membrane unit 21 from the axial direction of the main pipe portion 91 of the water collection pipe 90.
  • a locking member 98 is in contact with the socket pipe 16 of the filtration membrane unit 21 attached to the water collection pipe 90 from the side opposite to the water collection pipe 90 .
  • a locking member 98 made of U-shaped steel is bolted to a frame to be described later, and extends in the axial direction of the main pipe portion 91 of the water collection pipe 90, and is attached to all the filtration membrane units 21 arranged in the coaxial direction. abuts on the socket pipe 16 of.
  • Each of the plurality of filtration membrane units 21 locks the axial movement of the discharge pipe (16a) by a locking member 98 when the discharge pipe (16a) is inserted into the individual water collection channel (93) of the water collection pipe 90. will be stopped.
  • the filtration membrane unit 21 locked in this manner prevents the discharge pipe (16a) that is not screwed to the individual water collection channel (93) from coming off from the individual water collection channel (93).
  • FIG. 6 is a perspective view showing the sealing plug 100.
  • the sealing plug 100 includes a hook portion 101, a flexible portion 102, a main body portion 103, and a handle 105 from the front end side to the rear end side.
  • the hook part 101 has a slope part 101a that increases the radial dimension of the main body part 103 from the tip side to the rear end side in the axial direction of the cylindrical body part 103, and a slope part 101a that extends in the same radial direction at the rear end of the slope part 101a.
  • the step portion 101b rapidly reduces the size of the step portion 101b.
  • the flexible portion 102 has an elongated shape integrally formed with the hook portion 101 and the main body portion 103, and can be bent in the radial direction of the main body portion 103.
  • the cylindrical main body portion 103 includes two O-rings 104 arranged in the axial direction on the outer peripheral surface of the distal end side.
  • the O-ring 104 is made of an elastic material such as resin or rubber.
  • the handle 105 protrudes rearward from the rear end surface of the main body 103 in the axial direction, and extends in the radial direction of the main body 103.
  • FIG. 7 is a sectional view showing the sealing plug 100 and the water collection pipe 90 immediately before being inserted into the individual water collection channel 93 of the water collection pipe 90.
  • FIG. 8 is a sectional view showing the sealing plug 100 and the water collection pipe 90 that are being inserted into the individual water collection channel 93.
  • FIG. 9 is a sectional view showing the sealing plug 100 inserted into the individual water collection channel 93 and the water collection pipe 90.
  • the sealing plug 100 begins to be inserted into the individual water collection channel 93 with the hook portion 101 facing forward. As shown in FIG. 8, the sealing plug 100 that is being inserted slides the hook portion 101 on the tip side against the inner circumferential surface of the individual water collection channel 93. As the flexible portion 102 bends radially outward as a result of the sliding, the hook portion 101 can be inserted.
  • a hooked portion 91a on which the step portion 101b of the sealing plug 100 is hooked is arranged at the boundary between the individual water collection channel 93 of the water collection pipe 90 and the inner space of the main pipe portion 91.
  • the sealing plug 100 that has been completely inserted into the individual water collection channel 93 has the hook portion 101 on the tip side located in the communication area between the individual water collection channel 93 and the inner space of the main pipe portion 91.
  • the sliding contact with the individual water collection channel 93 is released.
  • the flexible portion 102 which had been bent until then, loses its bending, so that the stepped portion 101b of the hooking portion 101 is hooked on the hooked portion 91a, as shown in the figure.
  • the O-ring 104 of the main body 103 is interposed between the outer circumferential surface of the main body 103 and the inner circumferential surface of the individual water collection channel 93 to ensure airtightness between the two.
  • FIG. 10 is a cross-sectional view for explaining the preparation operation for pulling out the sealing plug 100.
  • FIG. 11 is a sectional view showing the sealing plug 100 and the water collection pipe 90 immediately after the extraction preparation operation has been performed.
  • FIG. 12 is a sectional view showing the sealing plug 100 and the water collection pipe 90 in the middle of being pulled out.
  • a pulling out preparation operation is performed prior to pulling out.
  • the main body portion 103 is rotated approximately 90 degrees clockwise or counterclockwise while gripping the handle 105.
  • the hook portion 101 of the sealing plug 100 rotates to a position where the stepped portion (101b) is not hooked on the hooked portion 91a.
  • the sealing plug 100 can be pulled out from the individual water collection channel 93.
  • FIG. 13 is a perspective view showing the filtration treatment equipment 18 including the filtration system 20 according to the embodiment.
  • This filtration treatment equipment 18 holds two filtration systems 20 stacked one above the other on a metal frame 19.
  • the above-mentioned locking member (98) is bolted to the frame 19.
  • the present invention is not limited to the embodiments and examples described above, and configurations different from the embodiments and examples may be adopted within the scope where the configurations of the present invention are applicable.
  • the present invention has specific effects for each aspect described below.
  • the first aspect includes a plurality of filtration membrane units (filtration membrane units 21) each including a filtration membrane (filtration membrane 22) and a discharge path for discharging the filtrate obtained by the filtration membrane, and a main pipe part (main pipe part 91) and a plurality of individual water collection channels (individual water collection channels 93) arranged in the axial direction of the main pipe part and communicating with the main pipe part (water collection pipe 90), which includes a plurality of the filtration membranes.
  • a filtration system (filtration system 20) that collects the filtrate filtered by the filtration membrane in each of the units into the main pipe section of the water collection pipe via the discharge path and the individual collection channel of the water collection pipe.
  • a locking member (locking member 98) is provided to lock the movement of the discharge passage in each of the plurality of filtration membrane units in the axial direction, and each of the plurality of filtration membrane units locks the discharge passage in the axial direction.
  • An O-ring (O-ring 16b) made of an elastic material is provided on the outer peripheral surface of the discharge pipe (discharge pipe 16a) to be formed, and when the discharge pipe is inserted into the individual water collection channel, the locking member This is characterized in that the discharge pipe is prevented from moving in the axial direction.
  • a second aspect is a filtration system having the configuration of the first aspect, wherein the drain pipe of the filtration membrane unit is inserted into the individual water collection channel in which the drain pipe of the filtration membrane unit is not inserted, among the plurality of individual water collection channels in the water collection pipe.
  • the present invention is characterized in that it includes a sealing plug (sealing plug 100) that seals the individual water collection channels.
  • the filtration system can be continued by sealing the individual water collection channels from which the filtration membrane units have been removed with the sealing plugs. Can drive.
  • a third aspect is a filtration system having the configuration of the second aspect, in which the sealing plug has a hook portion (hang portion 101) disposed at the tip end in the axial direction, and a hook portion (hang portion 101) disposed at the center portion in the axial direction.
  • a cylindrical main body part main body part 103
  • a handle handle 105 that projects rearward from the rear end surface of the main body part in the axial direction and extends in the radial direction, and between the hook part and the main body part.
  • the water collecting pipe is characterized in that it includes a hooked portion (hooked portion 91a) on which the stepped portion of the hook portion is hooked.

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

Abstract

Le but de la présente invention est de réduire le temps et l'effort requis pour le travail de maintenance et d'inspection d'unités de membrane de filtration. Ce système de filtration est équipé d'une pluralité d'unités de membrane de filtration (21), et d'un tuyau de collecte d'eau (90) pourvu d'un tuyau principal (91) et d'une pluralité de canaux de collecte d'eau individuels qui sont alignés dans la direction axiale du tuyau principal (91) et qui communiquent avec le tuyau principal (91). Ce système de filtration collecte le filtrat filtré par la membrane de filtration (22) dans chacune de la pluralité d'unités de membrane de filtration (21), dans le tuyau principal (91) du tuyau de collecte d'eau (90) à travers un canal d'évacuation et les canaux de collecte d'eau individuels du tuyau de collecte d'eau (90). Ce système de filtration est équipé d'un élément de verrouillage (98) qui verrouille le mouvement axial du canal d'évacuation dans chacune de la pluralité d'unités de membrane de filtration (21). Chacune de la pluralité d'unités de membrane de filtration (21) est équipée d'un joint torique comprenant un matériau élastique sur la circonférence externe d'un tuyau d'évacuation qui forme le canal d'évacuation, et le tuyau d'évacuation est inséré dans les canaux de collecte d'eau individuels et verrouillé contre un mouvement axial par l'élément de verrouillage (98).
PCT/JP2023/007721 2022-03-17 2023-03-02 Système de filtration WO2023176465A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-042256 2022-03-17
JP2022042256A JP7380731B2 (ja) 2022-03-17 2022-03-17 濾過システム

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WO2023176465A1 true WO2023176465A1 (fr) 2023-09-21

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090236295A1 (en) * 2006-05-08 2009-09-24 Itn Nanovation Ag Immersion filter unit for wastewater treatment and production of drinking water
JP2014528352A (ja) * 2011-09-30 2014-10-27 エヴォクア ウォーター テクノロジーズ エルエルシーＥｖｏｑｕａ Ｗａｔｅｒ Ｔｅｃｈｎｏｌｏｇｉｅｓｌｌｃ 改良したマニホルド構造
WO2017110283A1 (fr) * 2015-12-25 2017-06-29 株式会社明電舎 Structure d'agencement d'élément à membrane, cassette de membrane, et unité de membrane
WO2017208707A1 (fr) * 2016-05-31 2017-12-07 株式会社明電舎 Dispositif de séparation de film, structure de mise en place d'un élément de film, et cassette de film et unité de film

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090236295A1 (en) * 2006-05-08 2009-09-24 Itn Nanovation Ag Immersion filter unit for wastewater treatment and production of drinking water
JP2014528352A (ja) * 2011-09-30 2014-10-27 エヴォクア ウォーター テクノロジーズ エルエルシーＥｖｏｑｕａ Ｗａｔｅｒ Ｔｅｃｈｎｏｌｏｇｉｅｓｌｌｃ 改良したマニホルド構造
WO2017110283A1 (fr) * 2015-12-25 2017-06-29 株式会社明電舎 Structure d'agencement d'élément à membrane, cassette de membrane, et unité de membrane
WO2017208707A1 (fr) * 2016-05-31 2017-12-07 株式会社明電舎 Dispositif de séparation de film, structure de mise en place d'un élément de film, et cassette de film et unité de film

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JP7380731B2 (ja) 2023-11-15

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