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WO2016171011A1 - Dispositif de filtration - Google Patents

Dispositif de filtration Download PDF

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Publication number
WO2016171011A1
WO2016171011A1 PCT/JP2016/061528 JP2016061528W WO2016171011A1 WO 2016171011 A1 WO2016171011 A1 WO 2016171011A1 JP 2016061528 W JP2016061528 W JP 2016061528W WO 2016171011 A1 WO2016171011 A1 WO 2016171011A1
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WO
WIPO (PCT)
Prior art keywords
hollow fiber
fiber membrane
filtration
holding member
average
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/JP2016/061528
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English (en)
Japanese (ja)
Inventor
育 田中
博子 三木
知行 米田
森田　徹
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.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries 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 Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Publication of WO2016171011A1 publication Critical patent/WO2016171011A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • B01D63/04—Hollow fibre modules comprising multiple hollow fibre assemblies
    • 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
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/30—Polyalkenyl halides
    • B01D71/32—Polyalkenyl halides containing fluorine atoms
    • B01D71/36—Polytetrafluoroethene
    • 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 device.
  • Filtration devices having filtration modules in which a plurality of hollow fiber membranes are converged are used as solid-liquid separation treatment devices in sewage treatment and pharmaceutical manufacturing processes.
  • the outer peripheral surface side of the hollow fiber membrane is set to a high pressure, and the liquid to be processed is passed through the inner peripheral surface side of the hollow fiber membrane by an external pressure type, osmotic pressure or negative pressure on the inner peripheral surface side.
  • an immersion type that permeates to the inner peripheral surface side
  • an internal pressure type that allows the liquid to be treated to permeate the outer peripheral surface side of the hollow fiber membrane with a high pressure on the inner peripheral surface side of the hollow fiber membrane.
  • the external pressure type and the immersion type are contaminated with the use of substances contained in the liquid to be treated as the surface of each hollow fiber membrane is contaminated. Therefore, a cleaning method (air scrubbing) has been conventionally used in which bubbles are sent from below the filtration module, the bubbles scrape the surface of each hollow fiber membrane, and further vibrate each hollow fiber membrane to remove deposits. (See JP2010-42329).
  • the air bubbles for cleaning the hollow fiber membrane surface are generally supplied continuously in order to keep the hollow fiber membrane surface clean. Therefore, if the cleaning efficiency of the surface of the hollow fiber membrane due to the bubbles decreases, the energy required for supplying the cleaning bubbles for maintaining the filtration capability increases, which may increase the filtration cost. As a measure for reducing the filtration cost, there is means for vertically connecting a plurality of filtration modules. However, bubbles diffuse in the hollow fiber membrane holding member (the connection portion of the filtration module), and the bubbles are formed on the upper hollow fiber membrane surface. There is a possibility that the cleaning efficiency may be lowered as a result.
  • This invention is made
  • a filtration device made to solve the above problems includes a plurality of hollow fiber membranes that are aligned vertically and a pair of holding members that fix upper and lower ends of the plurality of hollow fiber membranes. 1 or a plurality of filtration modules, and one or a plurality of cleaning modules for supplying air bubbles from below the filtration module, wherein the lower holding member is an upper holding member in plan view Are arranged in a shifted manner.
  • the filtration device according to one embodiment of the present invention is excellent in the cleaning efficiency of the hollow fiber membrane surface.
  • FIG. 1 is a schematic diagram showing a filtration system having a filtration device according to an embodiment of the present invention.
  • FIG. 2 is a schematic plan view showing the filtration module held by the filtration device of FIG. 1.
  • FIG. 3 is a schematic perspective view of the filtration module of FIG.
  • a filtration device includes a plurality of hollow fiber membranes that are aligned vertically, and one or a plurality of filtration modules having a pair of holding members that fix upper and lower ends of the plurality of hollow fiber membranes. And a filtration device comprising one or more cleaning modules for supplying air bubbles from below the filtration module, wherein the lower holding member is arranged to be shifted with respect to the upper holding member in plan view. ing.
  • the lower holding member is arranged so as to be shifted with respect to the upper holding member in plan view, so that bubbles rising vertically around the lower holding member collide with the hollow fiber membrane. It is easy to do and is excellent in the washing efficiency of the hollow fiber membrane by air bubbles. For this reason, the said filtration apparatus can maintain the filtration capability comparatively easily.
  • the filtration module has a structure in which a plurality of hollow fiber membranes are arranged in a curtain shape on a rod-shaped holding member, and the plurality of filtration modules are arranged in parallel and at equal intervals.
  • the lower holding member of the module may be shifted by a certain distance in the direction perpendicular to the axial direction in plan view.
  • the lower holding members of the plurality of filtration modules are shifted by a certain distance in the axial direction and the vertical direction with respect to the upper holding member in plan view, without increasing the arrangement pitch of the filtration modules.
  • the length of the hollow fiber membrane that is behind the lower holding member as viewed from below can be reduced. Thereby, it is possible to reduce the amount of air necessary for cleaning the hollow fiber membrane and improve the cleaning efficiency while suppressing the enlargement of the apparatus.
  • the shift amount is preferably 50% to 200% of the arrangement pitch of the plurality of filtration modules.
  • the bubble discharge port of the cleaning module may be disposed in the gap between the lower holding members in plan view. As described above, since the bubble discharge port of the cleaning module is disposed in the gap of the lower holding member in a plan view, the bubbles rising from the bubble discharge port of the cleaning module are held on the lower side. It can efficiently collide with the hollow fiber membrane through the gap between the members. For this reason, the washing efficiency of the hollow fiber membrane can be improved more reliably.
  • a plurality of hollow fiber membranes disposed between the pair of holding members have slack.
  • the hollow fiber membranes swing, so that bubbles are formed inside the bundle of hollow fiber membranes.
  • the hollow fiber membrane inside can be easily cleaned by entering, and the cleaning effect can be promoted by the vibration of the hollow fiber membrane.
  • the hollow fiber membrane is preferably composed mainly of polytetrafluoroethylene.
  • the hollow fiber membrane since the hollow fiber membrane has polytetrafluoroethylene as a main component, the hollow fiber membrane has sufficient mechanical strength and can withstand strong abrasion due to air bubbles. It can be optimized to promote the cleaning effect.
  • plan view means a state viewed from above and below.
  • “Shifting” means shifting the position of the center of gravity.
  • the “bar shape” means an elongated shape, and specifically means that the length in the longitudinal direction is at least four times the maximum width (maximum diameter) in the direction perpendicular to the longitudinal direction.
  • a plurality of hollow fiber membranes arranged in a curtain shape means that the plurality of hollow fiber membranes are arranged like a wall separating one direction from the other.
  • the hollow fiber membrane has a slack” means that the hollow fiber membrane fixed to the pair of holding members is not in a tension state, specifically, the hollow between the pair of holding members.
  • the filtration system of FIG. 1 includes a filtration tank T that stores a liquid to be treated and a filtration device 1 according to an embodiment of the present invention that is disposed in the filtration tank T.
  • the vertical direction is the Z direction
  • the horizontal direction is the X direction
  • the depth direction on the paper is the Y direction.
  • the filtration tank T stores the liquid to be treated so that the filtration device 1 is immersed therein.
  • a material of the filtration tank T for example, resin, metal, concrete, or the like can be used.
  • the filtration device 1 includes a plurality of filtration modules 2, a frame 3 that holds the plurality of filtration modules 2, a cleaning module 4 that supplies air bubbles from below the filtration module 2, and a filtered product that has been filtered by the filtration module 2. And a discharge mechanism 5 for discharging the liquid.
  • the filtration module 2 includes a plurality of hollow fiber membranes 6 aligned in the vertical direction (Z direction or substantially Z direction), an upper holding member 7 that fixes the upper ends of the plurality of hollow fiber membranes 6, and the upper holding member.
  • a lower holding member 8 that forms a pair with the member 7 and fixes the lower ends of the plurality of hollow fiber membranes 6 is provided.
  • the lower holding member 8 is arranged to be shifted with respect to the upper holding member 7 in plan view. That is, the filtration module 2, when viewed from the vertical direction, so that the center of gravity C 2 of the projection shape of the projected shape of the center of gravity C 1 and the lower holding member 8 of the upper retaining member 7 is positioned shifted in the X or Y direction distribution Established.
  • the extending direction of the plurality of hollow fiber membranes 6 does not completely coincide with the Z direction and can be at least partially inclined in the X direction or the Y direction.
  • the lower holding member 8 is disposed so as to be shifted with respect to the upper holding member 7 in plan view, so that the periphery of the lower holding member 8 is vertically arranged as shown in FIG.
  • the rising bubbles are likely to collide with the hollow fiber membrane 6, and the cleaning efficiency of the hollow fiber membrane 6 by the bubbles is excellent. For this reason, the said filtration apparatus 1 can maintain the filtration capability comparatively easily.
  • the plurality of filtration modules 2 for example, as shown in FIG. 3, the upper holding member 7 and the lower holding member 8 are formed in a bar shape elongated in the Y direction, and along the axial direction (longitudinal direction) thereof.
  • the plurality of hollow fiber membranes 6 are preferably arranged in a curtain shape.
  • a plurality of hollow fiber membranes 6 of each filtration module 2 may be held in an arrangement different from the curtain shape.
  • the planar shape of the upper holding member 7 and the lower holding member 8, and the sectional shape of the bundle of hollow fiber membranes 6 held by the upper holding member 7 and the lower holding member 8 in the XY plane is It is good also as a rectangular shape where the width
  • the several filtration module 2 is arrange
  • the plurality of filtration modules 2 are preferably held by the frame 3 side by side in the X direction so that the axes of the upper holding member 7 and the lower holding member 8 are parallel and equally spaced.
  • the lower holding member 8 is in the same direction (X) perpendicular to the axial direction (Y direction) of the lower holding member 8 by the same distance (shift amount S) with respect to the upper holding member 7. It is preferable to be arranged shifted in the direction). As shown in FIG. 2, by making the shift amount S constant, the lower holding members 8 can be prevented from interfering with each other even if the arrangement pitch P of the plurality of filtration modules 2 is reduced.
  • the lower limit of the arrangement pitch P of the filtration module 2 is preferably 1.1 times the average width W of the lower holding member 8 in plan view, and more preferably 1.2 times.
  • the upper limit of the arrangement pitch P is preferably 5 times the average width W of the lower holding member 8 and more preferably 2 times.
  • the lower limit of the shift amount S of the lower holding member 8 is preferably 30% of the arrangement pitch P of the filtration module 2, and more preferably 50%.
  • the upper limit of the shift amount S of the lower holding member 8 is preferably 200% of the arrangement pitch P of the filtration module 2, and more preferably 150%.
  • the plurality of hollow fiber membranes 6 disposed between the pair of holding members have slack in a state where the filtration module 2 is held by the frame 3.
  • the average effective length of the hollow fiber membrane 6 is the average distance between both ends of the effective portion (the center of the lower surface of the portion holding the hollow fiber membrane 6 of the upper holding member 7 and the hollow fiber of the lower holding member 8 It is preferable that an upward force due to the tension of the hollow fiber membrane 6 does not act on the lower holding member 8, which is larger than the distance from the center of the upper surface of the portion holding the membrane 6.
  • the hollow fiber membrane 6 Since the hollow fiber membrane 6 has slackness as described above, the hollow fiber membrane 6 can be easily moved, so that air bubbles can easily enter the bundle of the hollow fiber membranes 6 and the hollow fiber membrane 6 can be moved. The cleaning effect can be promoted by the vibration of. Moreover, since the hollow fiber membrane 6 has slack, the upper part of the hollow fiber membrane 6 is suspended in a substantially vertical direction, and the lower part of the hollow fiber membrane 6 is held in a state of being largely inclined. For this reason, bubbles rising through the gap between the lower holding members 8 can collide with a portion of the hollow fiber membrane 6 closer to the lower holding member 8, and the bubbles colliding with the hollow fiber membrane 6 can be hollow fibers. It tends to rise along the upper part of the film 6.
  • the effective portion of the hollow fiber membrane 6 (the portion between the upper holding member 7 and the lower holding member 8) extends substantially linearly.
  • the hollow fiber membrane 6 has a slack, the hollow fiber membrane 6 is bent and deviated from a straight line connecting both ends of the effective portion. Accordingly, the amount of looseness of the hollow fiber membrane 6 is determined by the ratio of the effective length of the hollow fiber membrane 6 to the linear distance between both ends of the effective portion of the hollow fiber membrane 6 (as an easy-to-understand example, the effective portion of the hollow fiber membrane 6 Can be expressed as the ratio of the length of the arc to the length of the chord when the arc is bent in an arc.
  • the lower limit of the average effective length ratio with respect to the average linear distance between both ends of the effective portion of the hollow fiber membrane 6 is preferably 1.01 and more preferably 1.02.
  • the upper limit of the ratio of the average effective length to the average linear distance between both ends of the effective portion of the hollow fiber membrane 6 is preferably 1.2 and more preferably 1.1.
  • the ratio of the average effective length to the average linear distance between both ends of the effective portion of the hollow fiber membrane 6 is less than the lower limit, the amount of the hollow fiber membrane 6 that can be swung is small, and the bubbles inside the bundle of the hollow fiber membranes 6 are small. There is a possibility that the cleaning promoting effect due to the intrusion or vibration of the hollow fiber membrane 6 may not be sufficiently obtained.
  • the ratio of the average effective length to the average linear distance between both ends of the effective portion of the hollow fiber membrane 6 exceeds the above upper limit, the hollow fiber membranes 6 may be entangled with each other to inhibit cleaning.
  • the cleaning module 4 is preferably disposed below the filtration module 2 and has a plurality of bubble discharge ports 9 that discharge bubbles at positions corresponding to the filtration modules 2.
  • the plurality of bubble discharge ports 9 are arranged in parallel to the axial direction of the upper holding member 7 and the lower holding member 8 of the filtration module 2 and correspond to each filtration module 2. It may be provided so as to form a row.
  • the row of the bubble discharge ports 9 is preferably arranged on the opposite side of the lower holding member 8 of the corresponding filtration module 2 from the shift direction of the lower holding member 8 with respect to the upper holding member 7 in plan view. .
  • These rows of the bubble discharge ports 9 are preferably arranged so as to be shifted by a certain distance with respect to the corresponding lower holding member 8 in plan view.
  • it is more preferable that the rows of the bubble discharge ports 9 are shifted and arranged so as to be arranged between the upper holding member 7 and the lower holding member 8 of the corresponding filtration module 2 in plan view. More specifically, the row of bubble discharge ports 9 is arranged in the gap between the lower holding members 8 in a plan view.
  • the bubbles discharged from the bubble discharge port 9 efficiently pass between the lower holding members 8 and collide with the hollow fiber membrane 6 and rub against the hollow fiber membrane 6, whereby the outer periphery of the hollow fiber membrane 6 is Remove turbidity adhering to the surface.
  • the structure of the cleaning module 4 may be anything as long as it can discharge bubbles from the plurality of bubble discharge ports 9.
  • the filter module 2 corresponds one-to-one and is not shown. It can be assumed that a plurality of pipes 10 to which air is supplied from an air source are provided, and the bubble discharge ports 9 are formed in a row in each of the plurality of pipes 10.
  • the bubble discharge port 9 of the cleaning module 4 may not be shifted in the X direction (left side in the figure) with respect to the lower holding member 8, and the shift direction is the upper side of the lower holding member 8.
  • the same direction as the shift direction (right side in the drawing) with respect to the holding member 7 (the side opposite to the side where the corresponding upper holding member 7 is present with respect to the lower holding member 8) may be used.
  • the lower limit of the average diameter of the bubble discharge ports 9 is preferably 1 mm, and more preferably 2 mm.
  • the upper limit of the average diameter of the bubble discharge ports 9 is preferably 10 mm, more preferably 8 mm.
  • the average diameter of the bubble discharge ports 9 is less than the lower limit, there is a possibility that the bubble discharge amount cannot be sufficiently obtained.
  • the average diameter of the bubble discharge ports 9 exceeds the above upper limit, there is a possibility that the supply amount of bubbles becomes non-uniform due to an increase in the discharge amount of bubbles from the bubble discharge port 9 close to the gas supply source. .
  • the lower limit of the average diameter (average outer diameter) of the pipe 10 is preferably 10 mm, and more preferably 15 mm.
  • the upper limit of the average diameter of the pipe 10 is preferably 80 mm, and more preferably 60 mm.
  • the average diameter of the pipe 10 is less than the lower limit, there is a possibility that a sufficient amount of bubbles cannot be discharged.
  • the average diameter of the cleaning module 4 exceeds the upper limit, it may be difficult to dispose the bubble discharge ports 9 of the cleaning module 4 corresponding to the gaps between the adjacent filtration modules 2 in each row.
  • the discharge mechanism 5 includes a water collection pipe 11 that is connected to the drain nozzles 7 a of the plurality of filtration modules 2 and collects the filtered processed liquid, and a suction pump 12 that sucks the processed liquid from the water collection pipe 11. .
  • the hollow fiber membrane 6 is formed by forming a porous membrane into a tubular shape that allows the liquid to permeate while blocking the permeation of impurities contained in the liquid to be treated.
  • thermoplastic resin examples include polyethylene, polypropylene, polyvinylidene fluoride, ethylene-vinyl alcohol copolymer, polyamide, polyimide, polyetherimide, polystyrene, polysulfone, polyvinyl alcohol, polyphenylene ether, polyphenylene sulfide, cellulose acetate, and polyacrylonitrile.
  • PTFE polytetrafluoroethylene
  • PTFE which is excellent in mechanical strength, chemical resistance, heat resistance, weather resistance, nonflammability and the like and is porous is preferable, and uniaxially or biaxially stretched PTFE is more preferable.
  • other polymers, additives, such as a lubricant, etc. may be suitably mix
  • the average width L 1 in the longitudinal direction (Y direction) in the upper holding member 7 and the lower holding member 8 of the bundle of the plurality of hollow fiber membranes 6 of each filtration module 2 is the average width L in the short direction (X direction). Larger than 2 is preferable. That is, the region where the hollow fiber membrane 6 exists in the alignment direction (Z direction) and the vertical direction (XY direction) in the upper holding member 7 and the lower holding member 8 is preferably rectangular.
  • the hollow fiber membranes 6 are preferably arranged in a matrix in the long side direction (Y direction) and the short side direction (X direction) of the existence region.
  • the “existing region” means a virtual convex polygon including all the hollow fiber membranes (a polygon having all inner angles of less than 180 °) having the smallest area.
  • the longitudinal lower limit of the average width L 1 of the bundle of the hollow fiber membrane 6, 300 mm is preferable, 500 mm is more preferable.
  • the lower limit of the average width L 2 in the transverse direction of the bundle of the hollow fiber membranes 6, 10 mm is preferable, 15 mm is more preferable.
  • the upper limit of the average width L 2 in the transverse direction of the bundle of the hollow fiber membrane 6, 100 mm is preferable, 75 mm is more preferable. If the average width L 2 in the transverse direction of the bundle of the hollow fiber membrane 6 is less than the above lower limit, there is a possibility that sufficient filtration efficiency. Conversely, if the average width L 2 in the transverse direction of the bundle of the hollow fiber membrane 6 is more than the upper limit, appropriately supply the bubbles discharged from the cleaning module 4 to be described later to the center of the bundle of hollow fiber membranes 6 It may not be possible.
  • the lower limit of the ratio (L 2 / L 1 ) of the average width L 2 in the short direction of the bundle of hollow fiber membranes 6 to the average width L 1 in the longitudinal direction of the bundle of hollow fiber membranes 6 is preferably 1/80. 1/50 is more preferable.
  • the upper limit of the ratio (L 2 / L 1 ) of the average width L 2 in the short direction to the average width L 1 in the longitudinal direction is preferably 1/3, and more preferably 1/10.
  • the average pitch in the long side direction of the hollow fiber membrane 6 is preferably larger than the average pitch in the short side direction.
  • the lower limit of the ratio of the average pitch in the short side direction to the average pitch in the long side direction of the hollow fiber membrane 6 is preferably 2/5, and more preferably 1/2.
  • the upper limit of the ratio of the average pitch in the short side direction to the average pitch in the long side direction of the hollow fiber membrane 6 is preferably 4/5, and more preferably 2/3.
  • the ratio exceeds the upper limit, bubbles discharged from the cleaning module 4 may not be sufficiently introduced between the hollow fiber membranes 6 from one end side in the short side direction.
  • the lower limit of the filling area ratio of the hollow fiber membrane 6 in the existing region is preferably 20%, more preferably 30%.
  • the upper limit of the filling area ratio of the hollow fiber membrane 6 in the existing region is preferably 60%, and more preferably 55%.
  • the filling area ratio of the hollow fiber membrane 6 is less than the lower limit, the number of the hollow fiber membranes 6 per unit area decreases, and there is a possibility that sufficient filtration efficiency cannot be obtained.
  • the filling area ratio of the hollow fiber membrane 6 exceeds the upper limit, the gap between the hollow fiber membranes 6 becomes excessively small, and the bubbles discharged from the cleaning module 4 are allowed to enter the central portion of the bundle of the hollow fiber membranes 6. May not be able to supply enough.
  • the lower limit of the number (arrangement number) of the hollow fiber membranes 6 arranged in the short side direction in the existence region 8 is preferable and 12 is more preferable.
  • the upper limit of the number of the hollow fiber membranes 6 arranged in the short side direction is preferably 50 and more preferably 40.
  • the number of the hollow fiber membranes 6 arranged in the short side direction is less than the lower limit, the filtration efficiency per unit area may not be sufficiently ensured.
  • the number of the hollow fiber membranes 6 arranged in the short side direction exceeds the upper limit, there is a possibility that the air bubbles discharged from the cleaning module 4 cannot be accurately supplied to the center of the bundle of the hollow fiber membranes 6. .
  • the lower limit of the ratio of the average pitch in the short side direction to the average outer diameter of the hollow fiber membrane 6 is preferably 1.
  • the upper limit of the ratio of the average pitch in the short side direction to the average outer diameter of the hollow fiber membrane 6 is preferably 3/2, and more preferably 7/5.
  • the lower limit of the average outer diameter of the hollow fiber membrane 6 is preferably 1 mm, more preferably 1.5 mm, and even more preferably 2 mm.
  • the upper limit of the average outer diameter of the hollow fiber membrane 6 is preferably 6 mm, more preferably 5 mm, and even more preferably 4 mm.
  • the mechanical strength of the hollow fiber membrane 6 may be insufficient.
  • the average outer diameter of the hollow fiber membrane 6 exceeds the above upper limit, the hollow fiber membrane 6 becomes insufficient in flexibility and vibration and peristalsis of the hollow fiber membrane 6 due to the contact of bubbles become insufficient.
  • the gap between the membranes 6 may be expanded to guide the bubbles to the center of the bundle of hollow fiber membranes 6, or the ratio of the surface area to the cross-sectional area of the hollow fiber membranes 6 may be reduced, leading to a reduction in filtration efficiency. is there.
  • the lower limit of the average inner diameter of the hollow fiber membrane 6 is preferably 0.3 mm, more preferably 0.5 mm, and even more preferably 0.9 mm.
  • the upper limit of the average inner diameter of the hollow fiber membrane 6 is preferably 4 mm, and more preferably 3 mm.
  • the lower limit of the ratio of the average inner diameter to the average outer diameter of the hollow fiber membrane 6 is preferably 3/10, and more preferably 2/5.
  • the upper limit of the ratio of the average inner diameter to the average outer diameter of the hollow fiber membrane 6 is preferably 4/5, and more preferably 3/5.
  • the ratio of the average inner diameter to the average outer diameter of the hollow fiber membrane 6 exceeds the upper limit, the thickness of the hollow fiber membrane 6 may be reduced, and the mechanical strength and the impurity permeation preventing effect may be insufficient. is there.
  • the lower limit of the average effective length along the central axis of the hollow fiber membrane 6 is preferably 1 m, and more preferably 2 m.
  • the upper limit of the average effective length of the hollow fiber membrane 6 is preferably 6 m, and more preferably 5 m.
  • the average effective length of the hollow fiber membrane 6 is less than the lower limit, the perforation of the hollow fiber membrane 6 due to the rubbing of bubbles becomes insufficient, and the gap between the hollow fiber membranes 6 is widened so that the bubbles are bundled in the hollow fiber membrane 6. There is a possibility that it cannot be guided to the center of the.
  • the average effective length of the hollow fiber membrane 6 exceeds the above upper limit, the hollow fiber membrane 6 may be excessively bent due to its own weight, or the handling property at the time of installing the filtration module 2 may be increased. May decrease.
  • the lower limit of the ratio of the average effective length to the average outer diameter (aspect ratio) of the hollow fiber membrane 6 is preferably 150, more preferably 1000.
  • the upper limit of the aspect ratio of the hollow fiber membrane 6 is preferably 6000, and more preferably 5000.
  • the aspect ratio of the hollow fiber membrane 6 is less than the above lower limit, the hollow fiber membrane 6 is not sufficiently perturbed due to the rubbing of the bubbles, and the gap between the hollow fiber membranes 6 is widened so that the bubbles are centered in the bundle of the hollow fiber membranes 6. May not be able to guide to the department.
  • the aspect ratio of the hollow fiber membrane 6 exceeds the above upper limit, the hollow fiber membrane 6 becomes extremely elongated, so that the mechanical strength when stretched up and down may be lowered.
  • the upper holding member 7 forms an internal space communicating with the lumen of the hollow fiber membrane 6 to be held, and has a drain nozzle 7a for discharging treated water filtered by the hollow fiber membrane 6 from this internal space.
  • the lower holding member 8 holds the lower end of the hollow fiber membrane 6.
  • the lower holding member 8 may form an internal space in the same manner as the upper holding member 7, and may hold the lower end of the hollow fiber membrane 6 in such a manner as to close the opening of the hollow fiber membrane 6.
  • the average width W of the lower holding member 8 in plan view can be the same as that of the upper holding member 7.
  • the frame 3 holds the upper holding member 7 and the lower holding member 8 of the plurality of filtration modules 2 to immerse the plurality of filtration modules 2 in the liquid to be treated stored in the filtration tank T. Arrange in the state.
  • the frame 3 is preferably configured to be removed from the filtration tank T while holding the filtration module 2. Moreover, it is preferable that the frame 3 is configured to hold a cleaning module 4 described later below the filtration module 2.
  • the filtration device 1 since the lower holding member is arranged so as to be shifted with respect to the upper holding member in plan view, the bubbles rising vertically around the lower holding member collide with the hollow fiber membrane. It is possible, and it is excellent in the washing efficiency of the hollow fiber membrane by air bubbles. For this reason, the said filtration apparatus 1 can maintain the filtration capability comparatively easily.
  • the plurality of arrangement pitches may not be constant. Further, the shift amount of the lower holding member with respect to the upper holding member and the shift amount with respect to the lower holding member of the bubble discharge port are not constant, and may be different for each filtration module.
  • the lower holding member may be provided with a drain nozzle to discharge the treated liquid.
  • positioning and quantity of the drain nozzle in a holding member can be changed arbitrarily.
  • cleaning module should just be able to supply a bubble from the lower part of a filtration module, for example, the jet type diffuser which injects a bubble from a diffuser, a sparger, etc., the bubbling jet which mixes a bubble with a water flow, and injects A nozzle or the like may be used.
  • a plurality of cleaning modules may be provided.
  • the filtration device has an external pressure type that allows the liquid to be treated to pass through the inner peripheral surface side of the hollow fiber membrane with a high pressure on the outer peripheral surface side of the hollow fiber membrane.
  • the filtration module of the filtration device may be configured such that the upper holding member holds both ends of the hollow fiber membrane and the lower holding member bends the hollow fiber membrane by bending it into a U shape.

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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

La présente invention porte, selon un mode de réalisation, sur un dispositif de filtration qui comprend : un ou plusieurs modules de filtration ayant une pluralité de membranes à fibres creuses s'étendant verticalement et ayant également une paire d'éléments de maintien permettant de fixer les extrémités supérieure et inférieure de la pluralité de membranes à fibres creuses; et un ou plusieurs modules de nettoyage destinés à fournir des bulles d'air à partir du dessous du module de filtration. L'élément de maintien inférieur est disposé de manière décalée par rapport à l'élément de maintien supérieur selon une vue en plan.
PCT/JP2016/061528 2015-04-24 2016-04-08 Dispositif de filtration Ceased WO2016171011A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2015088955A JP2018099633A (ja) 2015-04-24 2015-04-24 濾過装置
JP2015-088955 2015-04-24

Publications (1)

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WO2016171011A1 true WO2016171011A1 (fr) 2016-10-27

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TW (1) TW201641151A (fr)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018092342A1 (fr) * 2016-11-15 2018-05-24 住友電気工業株式会社 Module de filtration et dispositif de filtration
CN109758919A (zh) * 2018-12-27 2019-05-17 天津膜天膜科技股份有限公司 帘式膜组件

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6897586B2 (ja) * 2018-01-25 2021-06-30 住友電気工業株式会社 加圧式濾過装置
JP7310643B2 (ja) * 2020-02-21 2023-07-19 三菱ケミカル株式会社 廃水処理用膜モジュール、廃水処理装置及び廃水処理方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0975687A (ja) * 1995-09-14 1997-03-25 Kurita Water Ind Ltd 中空糸膜による膜分離装置
JPH11342321A (ja) * 1998-06-02 1999-12-14 Toray Ind Inc 中空糸膜処理装置
WO2012008115A1 (fr) * 2010-07-13 2012-01-19 川崎重工業株式会社 Unité de filtration sur membrane de type à immersion et appareil de filtration sur membrane de type à immersion
WO2013085318A1 (fr) * 2011-12-09 2013-06-13 제일모직 주식회사 Module membranes à fibres creuses et appareil de traitement de l'eau
JP2014511275A (ja) * 2011-03-16 2014-05-15 コーロン インダストリーズ インク ろ過装置及びそのための中空糸膜モジュール
JP2015006653A (ja) * 2013-05-30 2015-01-15 住友電気工業株式会社 濾過モジュール及び濾過装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0975687A (ja) * 1995-09-14 1997-03-25 Kurita Water Ind Ltd 中空糸膜による膜分離装置
JPH11342321A (ja) * 1998-06-02 1999-12-14 Toray Ind Inc 中空糸膜処理装置
WO2012008115A1 (fr) * 2010-07-13 2012-01-19 川崎重工業株式会社 Unité de filtration sur membrane de type à immersion et appareil de filtration sur membrane de type à immersion
JP2014511275A (ja) * 2011-03-16 2014-05-15 コーロン インダストリーズ インク ろ過装置及びそのための中空糸膜モジュール
WO2013085318A1 (fr) * 2011-12-09 2013-06-13 제일모직 주식회사 Module membranes à fibres creuses et appareil de traitement de l'eau
JP2015006653A (ja) * 2013-05-30 2015-01-15 住友電気工業株式会社 濾過モジュール及び濾過装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018092342A1 (fr) * 2016-11-15 2018-05-24 住友電気工業株式会社 Module de filtration et dispositif de filtration
CN109758919A (zh) * 2018-12-27 2019-05-17 天津膜天膜科技股份有限公司 帘式膜组件

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