JP4183160B2 - Hollow fiber membrane module - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hollow fiber membrane module suitable for filtering a particularly highly polluting liquid.
[0002]
[Prior art]
Hollow fiber membrane modules have been widely used in the field of so-called microfiltration, such as the production of aseptic water, drinking water, high-purity water, etc., and purification of air, but in recent years, secondary treatment and tertiary treatment in sewage treatment plants, Or examination to the highly polluted water treatment uses, such as solid-liquid separation of a septic tank, is performed in various forms.
[0003]
The hollow fiber membrane module applied to such an application has a large amount of clogging of the hollow fiber membrane at the time of filtration treatment. Therefore, an air diffuser is arranged below the hollow fiber membrane module, and air bubbles supplied from the air diffuser The hollow fiber membrane that also serves as aeration is washed.
[0004]
In addition, when high-pollution water (for example, SS ≧ 50 ppm, TOC ≧ 100 ppm) is filtered, a large amount of SS or organic matter adheres to the surface of the hollow fiber membrane or between the hollow fiber membranes as the filtration process proceeds. However, this causes a blockage of the hollow fiber membrane, leading to a decrease in the filtration life of the hollow fiber membrane module. For this purpose, it is necessary to perform cleaning for separating the hollow fiber membrane surface and the deposits between the hollow fiber membranes by water flow, air, vibration, ultrasonic waves, and the like.
[0005]
Furthermore, when the highly-polluting water is filtered by the hollow fiber membrane module, the hollow fiber membranes are fixed (adhered) and integrated with each other through a deposit such as an organic matter. There is also a problem that the effective membrane area of the hollow fiber membrane is reduced and the filtration flow rate is drastically reduced.
[0006]
As means for solving these various problems, Japanese Patent Application Laid-Open No. 8-215548 proposes a hollow fiber membrane module in which a water collecting pipe connected to the end of the hollow fiber membrane has a diffuse structure. Yes. Japanese Laid-Open Patent Publication No. 11-5023 proposes a hollow fiber membrane module in which a diffuser nozzle is disposed between sheet-like hollow fiber membranes in a laminate.
[0007]
[Problems to be solved by the invention]
By the way, in the filtration treatment by the hollow fiber membrane module according to the above-mentioned Japanese Patent Laid-Open No. 8-215548, most of the gas ejected from the water collecting pipe having the diffused structure rises along the outer surface of the hollow fiber membrane bundle. In addition, there is a drawback in that a residue such as a fibrous material or hair is easily entangled between the hollow fiber membranes in the vicinity of the upper water collecting member, thereby reducing the effective membrane area of the hollow fiber membranes and reducing the filtration flow rate.
[0008]
Further, since residue such as fibrous matter and hair attached between the hollow fiber membranes in the vicinity of the upper water collecting member grows with the passage of time, the flow path of the upward flow due to the gas ejected from the air diffuser is blocked. As a result, the speed of the upward flow is reduced, and the cleaning effect of the hollow fiber membrane surface is reduced.
[0009]
In addition, a hollow fiber membrane module according to Japanese Patent Application Laid-Open No. 11-5023 forms a laminated body with a large number of sheet-like hollow fiber membranes, and an air diffuser nozzle between the sheet-like hollow fiber membranes constituting this laminated body. Therefore, during the filtration process by this hollow fiber membrane module, the upward flow between adjacent sheet-like hollow fiber membranes interferes with each other at the upper part of the sheet-like hollow fiber membrane, Most of the upward flow flows out in the width direction of the sheet-like hollow fiber membrane. For this reason, the residue is easily entangled between the hollow fiber membranes in the vicinity of the upper water collecting member, thereby reducing the effective membrane area of the hollow fiber membranes and reducing the filtration flow rate.
[0010]
On the other hand, the present invention can effectively prevent the residue during the filtration process from being entangled with the sheet-like hollow fiber membrane, and is particularly efficient even when subjected to the filtration process of highly polluted water. A hollow fiber membrane module capable of performing a filtration treatment is provided.
[0011]
[Means for Solving the Problems]
The said subject can be solved by the hollow fiber membrane module of this invention provided with the following structure.
[0012]
  That is, the present invention provides at least an upper end portion of a sheet-like hollow fiber membrane disposed with the length direction of the hollow fiber membrane being substantially vertical.ButConnected to the upper water collecting memberWithThe liquid to be treated generates a flow that rises from the lower part of the sheet-like hollow fiber membrane along the sheet-like hollow fiber membrane, and changes to a substantially horizontal flow at the upper part of the sheet-like hollow fiber membrane. Means are provided for flowing between the hollow fiber membranes of the sheet-like hollow fiber membrane.During ~Empty fiber membrane moduleThe means for changing the liquid to be treated into a substantially horizontal flow at the upper part of the sheet-like hollow fiber membrane is along the length direction of the upper water collecting member connected to the upper end of the sheet-like hollow fiber membrane. Hollow fiber membrane module which is a horizontal shielding plateConsists of.
[0014]
Further, in the hollow fiber membrane module of the present invention having the above-described configuration, the shield in the vertical direction along the length direction of the sheet-like hollow fiber membrane is further provided at both left and right ends in the width direction of the sheet-like hollow fiber membrane. A plate is preferably provided.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the hollow fiber membrane module of the present invention will be described with reference to the drawings.
[0016]
  [Fig. 1]During ~It is a perspective view which shows an example of a hollow fiber membrane module, [FIG. 2] is the side surface sectional drawing.
[0017]
  Shown in [FIG. 1] and [FIG. 2]During ~The embodiment of the hollow fiber membrane module includes a sheet-like hollow fiber membrane 4 formed by a large number of hollow fiber membranes 3, 3,. ············ The sheet-like hollow fiber membrane 5 formed by ... And the upper ends of the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 are connected to the upper water collecting member 1 using the upper fixing resin 6, The lower end portions of the hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 are connected to the lower water collecting member 2 by using the lower fixing resin 7, and the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 4 are connected to the lower water collecting member 2. In the lower part between the hollow fiber membrane 5, an air diffuser 8 having a gas discharge hole 9 is arranged.
[0018]
In the embodiment of the hollow fiber membrane module shown in [FIG. 1] and [FIG. 2], the sheet-like hollow fiber membrane 4, from the lower part of the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5, 5 is the air diffuser 8 having the gas discharge hole 9, but a pump, a stirring blade, or the like is used instead of the air diffuser 8. You can also
[0019]
In the embodiment of the hollow fiber membrane module shown in FIG. 1 and FIG. 2, the flow of the liquid to be treated is substantially horizontal above the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5. The means for changing the direction and subsequently flowing between the hollow fiber membranes of the sheet-like hollow fiber membrane is the lower surface of the upper water collecting member 1.
[0020]
The sheet-like hollow fiber membranes 4 and 5 used in the hollow fiber membrane module having the above-described configuration have an elongated upper and lower end formed on the lower surface of the upper water collecting member 1 and the upper surface of the lower water collecting member 2. Any material that can be accommodated in a rectangular opening may be used. For example, the hollow fiber membranes 3, 3,... From the point of workability, a hollow fiber membrane bundle made of hollow fiber membranes 3, 3,... ... Are preferably made of knitted fabric with wefts or a laminated body in which a plurality of the knitted fabrics are laminated.
[0021]
Moreover, as a form of the sheet-like hollow fiber membrane composed of a laminated body in which a plurality of knitted fabrics are laminated, the knitted fabric may be folded and laminated to an appropriate length without cutting. Note that the sheet-like hollow fiber membrane obtained by folding and knitting the knitted fabric varies depending on the thickness of the knitted fabric, that is, the thickness of the hollow fiber membrane and the number of hollow fiber membranes combined when knitting the knitted fabric. It is preferable to use a ground layer (folding) number of up to about 10 normally.
[0022]
If the distance between the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 is too narrow, it becomes difficult to dispose the air diffuser 8 between them, and it is too wide. And, since the projection area of the hollow fiber membrane module becomes large, it is not preferable. Therefore, the distance between the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 is generally 10 to 100 mm, preferably 15 to 70 mm.
[0023]
The material of the hollow fiber membranes 3, 3,... Forming the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 is not particularly limited, but polysulfone resin, polyacrylonitrile , Cellulose derivatives, polyolefins such as polyethylene and polypropylene, fluorine resins such as polyvinylidene fluoride and polytetrafluoroethylene, polyamides, polyesters, polymethacrylates, polyacrylates, and the like. Further, a copolymer of these resins or one having a substituent introduced into a part thereof may be used, and further, a mixture resin of two or more kinds of resins may be used.
[0024]
As long as the hollow fiber membranes 3, 3,... Can be used as filtration membranes, their pore diameter, porosity, film thickness, outer diameter, etc. are particularly limited. Instead, for example, an outer diameter of 20 to 2000 μm, a pore diameter of 0.001 to 1 μm, a porosity of 20 to 90%, and a film thickness of about 5 to 300 μm are suitable.
[0025]
If the length of the hollow fiber membrane 3, 3,... Is too short, the area of the hollow fiber membrane as the filtration membrane in the resulting hollow fiber membrane module will be small, and if it is too long, It becomes difficult to manufacture the hollow fiber membrane module. Therefore, generally, the length of the hollow fiber membranes 3, 3,... Forming the distance between the upper water collecting member 1 and the lower water collecting member 2 is: It is preferable that it is about 300-2500 mm, More preferably, it is 400-2000 mm.
[0026]
The upper water collecting member 1 has an upper processing liquid outlet 12 on its side surface, and an elongated, substantially rectangular opening for accommodating the upper ends of the sheet-like hollow fiber membranes 4 and 5 on its lower surface. Have. Further, the lower water collecting member 2 has a lower treatment liquid outlet 13 on its side surface, and an elongated, substantially rectangular opening for accommodating the lower ends of the sheet-like hollow fiber membranes 4 and 5 on the upper surface thereof. Has a part. The upper water collecting member 1 and the lower water collecting member 2 basically function as members that retain the shape of the entire hollow fiber membrane module.
[0027]
The material of the upper water collecting member 1 and the lower water collecting member 2 may be any material having mechanical strength and durability. For example, polycarbonate, polysulfone, polyolefin, PVC (polyvinyl chloride), acrylic resin, ABS A resin, modified PPE (polyphenylene ether), or the like can be used. In addition, when it is necessary to incinerate the hollow fiber membrane module after use, a water collecting member made of a hydrocarbon-based resin such as polyolefin that does not emit a toxic gas during combustion and can be completely burned. It is preferable to make it.
[0028]
Further, the openings formed on the lower surface of the upper water collecting member 1 and the upper surface of the lower water collecting member 2, respectively, with the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 in each of these openings, For fixing the upper and lower ends of the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 with the upper fixing resin 6 and the lower fixing resin 7, respectively, the hollow fiber membranes 3, 3,. .. The cross-sectional shape in the vertical direction with respect to the vertical direction is a substantially rectangular shape, preferably the length of the short side perpendicular to the length direction of the water collecting member is 150 mm or less, more preferably It has a substantially rectangular shape of 100 mm or less.
[0029]
Note that the length of the long side of the elongated rectangular opening, that is, the length of the side that coincides with the length direction of the water collecting member is not particularly limited. The number of hollow fiber membranes that can be disposed in the hollow fiber membrane module is reduced, which is not preferable. If it is too long, it becomes difficult to produce the hollow fiber membrane module. For this reason, generally, the length of the long side is preferably about 150 to 2500 mm, and more preferably 200 to 2000 mm.
[0030]
For fixing the upper part for fixing the upper and lower ends of the sheet-like hollow fiber membranes 4 and 5 with the sheet-like hollow fiber membranes 4 and 5 in the openings of the upper water collecting member 1 and the lower water collecting member 2 The resin 6 and the lower fixing resin 7 are filled and fixed in the openings of the upper water collecting member 1 and the lower water collecting member 2 to form the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5. While maintaining the open state of the ends of the hollow fiber membranes 3, 3,..., The hollow fiber membranes 3, 3,. It functions as a member that fixes the liquid to be processed and the processing liquid in a liquid-tight manner so that the hollow fiber membranes 3, 3,... There is.
[0031]
As the upper fixing resin 6 and the lower fixing resin 7, an epoxy resin, an unsaturated polyester resin, a polyurethane resin, a silicone-based filler, various hot melt resins, and the like can be usually used. Further, the viscosity of the fixing resin before solidification is not particularly limited, but the viscosity of the fixing resin before solidification is 500 because the fixing resin is easily impregnated between a large number of hollow fiber membranes. Although it is -5000 mPa * s, it is preferable and it is more preferable that it is 2000-3000 mPa * s. The amount of the upper fixing resin 6 and the lower fixing resin 7 to be injected is appropriately determined depending on the shape of the housing used.
[0032]
As the air diffuser 8 disposed in the lower part between the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5, a tubular member such as a resin or metal whose one end is a gas supply port 14 is used. It is preferable to use an air diffuser provided with gas discharge holes 9, 9,..., And an air diffuser that supplies air from the gas supply port 14 using a blower is preferable.
[0033]
The shape, position, pitch, etc. of the gas discharge holes 9, 9,... Provided in the tubular member such as resin or metal used for the air diffuser 8 are the gas discharge holes 9, 9,. ············································································· Particularly limited There is no. For example, in the tubular member parallel to the sheet surfaces of the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5, gas discharge holes having a diameter of about 0.5 to 3 mm are provided at a pitch of 20 to 50 mm. In addition, it is desirable to have a structure in which gas can be sent to the entire sheet surfaces of the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5.
[0034]
The air bubbles from the gas discharge holes 9, 9,... Provided in the tubular member such as resin or metal used for the air diffuser 8 are as shown in FIG. Rises in the liquid to be treated between the hollow fiber membrane 4 and the sheet hollow fiber membrane 5 to the lower surface of the upper water collecting member 1, that is, above the sheet hollow fiber membrane 4 and the sheet hollow fiber membrane 5. And then the flow is changed in a substantially horizontal direction. Subsequently, the hollow fiber membranes 3, 3,... The hollow fiber membranes 3, 3,... Formed between the hollow fiber membranes 3, 3,.
[0035]
Thus, the flow of the liquid to be treated and the bubbles flows from between the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5, that is, from the inner surface side of the sheet-like hollow fiber membrane 4 or the sheet-like hollow fiber membrane 5. In the vicinity of the lower surface of the upper water collecting member 1 in order to go to the outer surface side of the hollow fiber membrane 4 or the sheet hollow fiber membrane 5. It is possible to effectively prevent tangling of residue such as hair and hair.
[0036]
The embodiment of the hollow fiber membrane module of the present invention shown in the side sectional view of FIG. 3 is the length of the upper water collecting member 1, 1 between the two upper water collecting members 1, 1. The horizontal shielding plate 10 disposed along the direction is provided, and the flow rising along the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 due to the arrangement of the shielding plate 10. The generated liquid to be treated is effectively changed into a substantially horizontal flow at the upper part of the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5, and subsequently the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 4 .. Flows between the hollow fiber membranes 3, 3,... Forming the hollow fiber membrane 5, and flows to the outside of the module.
[0037]
The embodiment of the hollow fiber membrane module shown in the front sectional view of FIG. 4 is a sheet-like hollow fiber membrane 4 in addition to the hollow fiber membrane module shown in FIG. 1 and FIG. (Not shown) and the left and right ends in the width direction of the sheet-like hollow fiber membrane 5 respectively in the length direction of the sheet-like hollow fiber membrane 4 (not shown) and the sheet-like hollow fiber membrane 5 Two vertical shielding plates 11, 11 are arranged.
[0038]
And by arrangement | positioning of this shielding board 11 and 11, a part of bubble which reached the lower surface of the upper water collection member 1 is between the sheet-like hollow fiber membrane 4 (not shown) and the sheet-like hollow fiber membrane 5. Can be prevented from moving from the left and right ends in the width direction of the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 to the outside of the hollow fiber membrane module. As a result, the liquid to be treated flows through the hollow fiber membranes 3, 3,... To the outside of the module more effectively.
[0039]
The vertical shielding plates 11, 11 are arranged between the upper water collecting member 1 and the lower water collecting member 2 in the width direction of the sheet-like hollow fiber membrane 4 (not shown) and the sheet-like hollow fiber membrane 5. It is preferable to arrange them as close as possible to the left and right end portions.
[0040]
The horizontal shielding plate 10 and the vertical shielding plate 11 are each composed of a plate-like member made of resin, metal, or the like.
[0041]
As shown in FIG. 5, the operation of the hollow fiber membrane module according to the present invention includes an air diffuser 8 connected to a blower 18 in a liquid tank 16 to be treated such as an activated sludge tank or a sedimentation tank. It is preferable to perform the suction filtration method in which the hollow fiber membrane module 15 is disposed and the side for collecting the treatment liquid 19 that has passed through the hollow fiber membrane is sucked by the suction pump 17 or the like.
[0042]
Examples of the suction method for sucking the side for collecting the treatment liquid 19 include a general self-contained suction pump method, a vacuum pump method, and a siphon method using a water head difference. In particular, by performing so-called intermittent suction operation that periodically repeats suction-stop for a predetermined time, it is more efficient for the deposit on the membrane surface of the hollow fiber membrane to enter the pores inside the hollow fiber membrane. Can be prevented.
[0043]
【Example】
Hereinafter, a specific configuration of the hollow fiber membrane module of the present invention will be described by way of examples.
[0044]
    Reference example
  A hollow fiber membrane module of the type shown in [FIG. 1] to [FIG. 2] was produced as follows.
[0045]
First, a sheet-like hollow fiber membrane (membrane area 1 m) using polyethylene hollow fiber membranes (outer diameter 540 μm, inner diameter 360 μm) 3, 3,..., Manufactured by Mitsubishi Rayon Co., Ltd.² 4) and a sheet-like hollow fiber membrane 5 having the same structure as that of the sheet-like hollow fiber membrane 4 were produced.
[0046]
Next, both the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 are arranged with an interval of 30 mm, and the upper ends of the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 are arranged at the upper part. Inserted into the openings formed in two rows in the water collecting member 1, and the lower ends of the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 are formed in two rows in the lower water collecting member 2. The upper fixing resin 6 is injected into the resin injection portion of the upper water collecting member 1 and solidified, and the lower fixing resin 7 is injected into the resin injection portion of the lower water collecting member 2. A hollow fiber membrane module was obtained by pouring and solidifying.
[0047]
In this hollow fiber membrane module, the effective length of the hollow fiber membranes 3, 3,... Forming the sheet hollow fiber membrane 4 and the sheet hollow fiber membrane 5 is 350 mm. Each length of the upper water collecting member 1 and the lower water collecting member 2 is 600 mm.
[0048]
Subsequently, the air diffuser 8 using a PVC pipe having an outer diameter of 22 mm provided with gas discharge holes 9, 9,... The gas discharge holes 9, 9,... Fixed towards.
[0049]
Furthermore, as shown in FIG. 5, a suction pump 17 is provided for the upper processing liquid outlet 12 provided in the upper water collecting member 1 and the lower processing liquid outlet 13 provided in the lower water collecting member 2, respectively. In addition, the air diffuser 8 was connected to the blower 18 and placed in the treatment liquid tank 16.
[0050]
Subsequently, waste water having a solid content concentration SS of 10,000 ppm is stored in the treatment liquid tank 16 and 100 m from the air diffuser 8.^Three / M² -Filtration flow rate of 0.4m with the SS and suction pressure in the wastewater kept constant while performing air diffusion at the rate of hr^Three / M² -The day filtration process was started. The amount of SS was determined by sampling the waste water, drying it, and weighing the solid content.
[0051]
The filtration flow rate at the end of the filtration process over 14 days is 0.38 m.^Three / M² ・ It was a day. Further, when the hollow fiber membrane module after the filtration treatment is pulled up from the wastewater and observed, the hollow fiber membranes 3, 3,. There was almost no tangling of the residue.
[0052]
    Example1
  A hollow fiber membrane module of the type shown in FIG. 3 was produced as follows.
[0053]
First, a sheet-like hollow fiber membrane (membrane area 1 m) using polyethylene hollow fiber membranes (outer diameter 540 μm, inner diameter 360 μm) 3, 3,... Manufactured by Mitsubishi Rayon Co., Ltd.² 4) and a sheet-like hollow fiber membrane 5 having the same configuration as that of the sheet-like hollow fiber membrane 4 was produced.
[0054]
Next, the upper end of the sheet-like hollow fiber membrane 4 is inserted and arranged in the opening of the upper water collecting member 1, and the lower end of the sheet-like hollow fiber membrane 4 is inserted in the opening of the lower water collecting member 2 After the placement, the upper fixing resin 6 is injected into the resin injection portion of the upper water collecting member 1 and solidified, and the lower fixing resin 7 is also injected into the resin injection portion of the lower water collecting member 2 and solidified. A first hollow fiber membrane module was obtained.
[0055]
In this first hollow fiber membrane module, the effective length of the hollow fiber membranes 3, 3,... Forming the sheet-like hollow fiber membrane 4 is 350 mm, and the upper water collecting member Each length of 1 and the lower water collecting member 2 is 600 mm.
[0056]
Furthermore, another second hollow fiber membrane module was obtained using the sheet-like hollow fiber membrane 5 in the same manner as in the production method of the first hollow fiber membrane module.
[0057]
Thereafter, the first hollow fiber membrane module and the second hollow fiber membrane module are separated from each other so that the distance between the sheet-like hollow fiber membrane 4 and the sheet-like hollow fiber membrane 5 of each hollow fiber membrane module is 30 mm. It fixed so that it might become.
[0058]
Subsequently, a stainless steel shielding plate 10 having a thickness of 1 mm is disposed between the upper water collecting member 1 of the first hollow fiber membrane module and the upper water collecting member 1 of the second hollow fiber membrane module. The water collecting member 1 was fixed and arranged in the horizontal direction along the entire length of the water collecting member 1.
[0059]
Further, the air diffuser 8 using a PVC pipe having an outer diameter of 22 mm in which gas discharge holes 9, 9,... Having a diameter of 3 mm are provided at a pitch of 30 mm is used as the first hollow fiber. In the lower position between the lower water collecting member 2 of the membrane module and the lower water collecting member 2 of the second hollow fiber membrane module, the gas discharge holes 9, 9, ... are directed downward. Fixed.
[0060]
  Next, as shown in FIG. 5, suction pumps 17 respectively connect the upper processing liquid outlet 12 provided in the upper water collecting member 1 and the lower processing liquid outlet 13 provided in the lower water collecting member 2. And the diffuser 8 is connected to the blower 18 and disposed in the treatment liquid tank 16,Reference exampleThe wastewater was filtered under the same conditions as for 14 days. The filtration flow rate at the end of the filtration process is 0.39 m.³/ M²・ It was a day.
[0061]
Further, when the hollow fiber membrane module after the filtration treatment is pulled up from the wastewater and observed, the hollow fiber membranes 3, 3,. There was almost no tangling of the residue.
[0062]
    Comparative Example 1
  Example1In Example 1, except that the installation of the shielding plate 10 between the upper water collecting member 1 of the first hollow fiber membrane module and the upper water collecting member 1 of the second hollow fiber membrane module is omitted.1A hollow fiber membrane module was prepared in the same manner as in Example 11The wastewater was filtered for 14 days under the same conditions as in.
The filtration flow rate at the end of the filtration process is 0.23 m.³/ M²・ It was a day.
[0063]
Further, when the hollow fiber membrane module after the filtration treatment is pulled up from the waste water and observed, the hollow fiber membranes 3, 3,... It was confirmed that the residue was entangled.
[0064]
【The invention's effect】
The hollow fiber membrane module of the present invention is a hollow fiber membrane module in which at least an upper end portion of a sheet-like hollow fiber membrane disposed with the length direction of the hollow fiber membrane being substantially vertical is connected to an upper water collecting member. The liquid to be treated generates a flow that rises from the lower part of the sheet-like hollow fiber membrane along the sheet-like hollow fiber membrane, and changes to a substantially horizontal flow at the upper part of the sheet-like hollow fiber membrane. Means for allowing flow between the hollow fiber membranes of the hollow fiber membrane.
[0065]
Therefore, according to the hollow fiber membrane module of the present invention, the liquid to be treated flows between the hollow fiber membranes forming the sheet-like hollow fiber membrane and then flows out of the hollow fiber membrane module. In addition, it is possible to effectively prevent the residue of fibrous matter and hair from getting entangled between the hollow fiber membranes near the lower surface of the upper water collecting member, thereby performing particularly high-contamination liquid filtration. However, high filtration efficiency can be maintained over a long period of time.
[0066]
In addition, the hollow fiber membrane module of the present invention has a large number of hollow fiber membranes arranged in a flat sheet shape and utilizes the filtration function of the hollow fiber membrane that forms this sheet shape. The entire hollow fiber membrane is not fixed and integrated into a single rod, and therefore the effective membrane area of the hollow fiber membrane is not drastically reduced, and this allows for a long period of time. The function of maintaining a high filtration efficiency is further improved.
[Brief description of the drawings]
[Figure 1]During ~It is a perspective view which shows an example of an empty fiber membrane module.
FIG. 2 is a side sectional view of the hollow fiber membrane module of FIG.
FIG. 3 shows the hollow fiber membrane module of the present invention.oneIt is side surface sectional drawing which shows an example.
FIG. 4 shows the hollow fiber membrane module of the present invention.AnotherIt is a front sectional view showing an example.
FIG. 5 is a flowchart showing an operation example of the hollow fiber membrane module of the present invention.
[Explanation of symbols]
        1 ... Upper water collecting member
        2 ... Lower water collecting member
        3. Hollow fiber membrane
        4. Sheet-like hollow fiber membrane
        5. Sheet-like hollow fiber membrane
        6 ・ ・ ・ ・ Resin for fixing the upper part
        7 ··· Lower part fixing resin
        8 .... Air diffuser
        9. Gas discharge hole
      10 .... Horizontal shielding plate
      11 ··· Vertical shield
      12 .... Upper processing liquid outlet
      13 .... Lower processing liquid outlet
      14 .... Gas supply port
      15. Hollow fiber membrane module
      16 .... Processing liquid tank
      17 .... Suction pump
      18 ... Blower
      19 ... Processing solution

Claims (2)

With at least the upper end portion of the hollow fiber membranes with a length direction substantially perpendicular disposed sheet-shaped hollow fiber membrane is thereby connected to the upper water collecting member, the liquid to be treated, from the lower part of the sheet-like hollow fiber membranes A flow that rises along the sheet-like hollow fiber membrane is generated, and the flow is changed to a substantially horizontal flow at the upper part of the sheet-like hollow fiber membrane, and subsequently flows between the hollow fiber membranes of the sheet-like hollow fiber membrane. in Soraitomaku module in which comprises means for means for the liquid to be treated is changed in a substantially horizontal direction of flow at the top of the sheet-like hollow fiber membrane, is connected to an upper end portion of the sheet-like hollow fiber membrane A hollow fiber membrane module, wherein the hollow fiber membrane module is a horizontal shielding plate disposed along the length direction of the upper water collecting member. The width direction of the left of the sheet-like hollow fiber membranes, both ends of the right hollow claim 1 Symbol mounting, characterized in that arranged in the vertical direction of the shielding plate along the length direction of the sheet-like hollow fiber membrane Yarn membrane module.

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