JP4588467B2 - Hollow fiber module and water treatment device - Google Patents

Description

  The present invention relates to a hollow fiber module and a water treatment device used for water purification treatment of river water or the like, or sewage purification treatment by a membrane separation activated sludge method such as sewage and industrial wastewater.

  In recent years, in the sewage purification treatment by the membrane separation activated sludge method, hollow fiber modules that obtain permeate by performing solid-liquid separation in which the inside of the hollow fiber membrane is subjected to negative pressure by suction and subjected to membrane filtration are used. It is coming. The hollow fiber module is generally immersed in water to be treated (active sludge mixed solution) that has been subjected to aerobic treatment in an aerobic tank in a water treatment tank in a state where the hollow fiber membrane is extended in the vertical direction. As such a hollow fiber module, for example, one having a configuration as described later is known.

  Hereinafter, an outline of the hollow fiber module according to the conventional example as described above will be introduced with reference to the accompanying drawings. FIG. 15 is a conceptual diagram showing a partial cross section of a conventional hollow fiber module. Reference numeral 70 shown in the figure is a hollow fiber module according to a conventional example, and this hollow fiber module 70 includes an upper fixing portion 72 and a lower fixing portion 74 which are configured as described later. The centers of the upper and lower fixing portions 72 and 74 are integrally connected and supported by a support rod 76 orthogonal to the upper and lower fixing portions 72 and 74.

  Between the upper fixing portion 72 and the lower fixing portion 74, a plurality of hollow fiber bundles 78 in which both ends of a plurality of hollow fiber membranes are bonded are arranged around the support rod 76 around the support rod 76, and are supported. The rod 76 is integrally formed with both ends. The upper end of the hollow fiber bundle 78 is open, and the lower end is sealed with an adhesive. A cap 73 having a permeate collection chamber 75 provided therein is disposed on the upper fixing portion 72, and the liquid collection chamber 75 has a permeate outlet (or a counter pressure washing water inlet) 82. Communicating with An air supply pipe 84 that supplies compressed air is connected to the lower fixing portion 74, and the compressed air supplied from the air supply pipe 84 is on the upper fixing portion 72 side and the hollow fiber bundle 78. Air ejection holes 86 are provided to be ejected between each other or on the outer periphery thereof. That is, the hollow fiber bundle 78 is cleaned by air scrubbing through the air ejection holes 86 provided in the lower fixing portion 74.

  The hollow fiber module 70 having the above-described configuration is used by being immersed in water to be treated in an aerobic tank of a biological reaction tank (not shown). During the filtration operation by the hollow fiber module 70, the water to be treated in the biological reaction tank is filtered through a suction pipe that communicates with the permeate outlet 82 and is provided with a suction pump. More specifically, the water to be treated in the biological reaction tank enters the internal space from the outer surface of the hollow fiber membrane constituting the hollow fiber bundle 78 and is filtered, and the permeated liquid entering the internal space passes through the hollow fiber membrane. It flows into the liquid collection chamber 75 from the upper end of the hollow fiber bundle 78 and is discharged from the permeate outlet 82.

By continuing the filtration operation of the hollow fiber module 70 as described above, suspended substances made of organic substances gradually adhere to the outer surface of the hollow fiber membrane, and the filtration performance gradually decreases. Therefore, air scrubbing is performed by supplying compressed air from the air supply pipe 84 provided in the lower fixing portion 74 to the air ejection hole 86 as necessary or at all times during the filtration operation. The suspended substances adhering to the surface are removed (for example, refer to Patent Document 1).
JP 2003-326140 A

  In addition, the compressed air supply apparatus for aeration which hold | maintains the aerobic tank of a bioreaction tank in an aerobic state is provided in the bottom part of the aerobic tank of the bioreaction tank in which a hollow fiber module is immersed.

  In the water to be treated in the biological reaction tank to be purified, fibrous impurities such as hair are mixed. Therefore, fibrous contaminants such as mixed hair are flowed by the upward flow of compressed air blown into the biological reaction tank and rise along the hollow fiber module, and each hollow fiber bundle of the hollow fiber module Adhere or get tangled. Such fibrous contaminants such as hair cannot be completely removed even if air scrubbing is performed by supplying compressed air from the air supply pipe to the air ejection holes unlike the suspended matter. Therefore, as the operation time elapses, the effective membrane area of the hollow fiber membrane due to the accumulation of contaminants decreases, and as a result, the amount of permeate decreases, resulting in the treatment capacity of the treated water of the hollow fiber module. There was a problem that decreased.

Therefore, the object of the present invention is to prevent the entanglement and adhesion of fibrous impurities such as hair to the membrane surface of the hollow fiber membrane, thereby effectively preventing the entanglement and adhesion of fibrous impurities such as hair. capture not only makes it possible to prevent a reduction in the processing capacity of the treatment water caused by, it is possible to contribute to a reduction in labor and running costs of the cleaning and the efficiently contaminants fibrous such as hair It is an object of the present invention to provide a hollow fiber module and a water treatment apparatus that can be used.

  The inventors can introduce fibrous contaminants such as hairs if they are guided to the outside of the hollow fiber module before the fibrous contaminants such as hair are attached to or entangled with each hollow fiber bundle of the hollow fiber module. The present invention has been made on the assumption that it is possible to prevent a reduction in the treatment capacity of the water to be treated of the hollow fiber module due to the adhesion of water.

Therefore, in order to solve the above problems, the means adopted by the hollow fiber module according to claim 1 of the present invention is immersed in the water to be treated supplied into the water treatment tank, and the upper ends of the plurality of hollow fiber membranes. A hollow fiber module comprising an upper fixing part that is fixed in an open state, and a lower fixing part having a plurality of air ejection holes for air scrubbing immediately below or near the lower ends of the plurality of hollow fiber membranes, From the inside position of the hollow fiber membrane group whose both ends are fixed by the upper fixing portion and the lower fixing portion, it extends obliquely upward as it leaves the hollow fiber membrane group, and is mixed into the treated water. A foreign matter removing member for guiding the fibrous foreign matter to the outside of the hollow fiber membrane group is provided , and the foreign matter removing member is a rod member configured to be detachable. Multiple thin lines extending outward at the tip Wood and is characterized in that is is implanted.

The means adopted by the hollow fiber module according to claim 2 of the present invention is the hollow fiber module according to claim 1, wherein the contaminant removing member is provided at a position below the upper fixing portion of the hollow fiber membrane group. It is characterized by being.

The means adopted by the water treatment apparatus according to claim 3 of the present invention is such that the hollow fiber module according to claim 1 or 2 is installed in a state where the upper fixing portion is submerged below the surface of the water to be treated. It is characterized by.

In the hollow fiber module according to claims 1 and 2 of the present invention, fibrous contaminants such as hair in the water to be treated in the biological reaction tank to be purified are caused to rise by the air blown into the biological reaction tank. It is accompanied and rises along the hollow fiber membrane group, but can be guided out of the hollow fiber membrane group by the contaminant removal member before being entangled with or attached to the hollow fiber membrane. Therefore, according to the hollow fiber module according to claims 1 and 2 of the present invention, as in the conventional example, the water to be treated of the hollow fiber module is caused by the entanglement or deposition of fibrous impurities such as hair. In addition to removing the stick member that is tangled or attached to the fiber, such as hair, and attaching a new stick member, only the removed stick member is removed. Since it only has to be cleaned, it can contribute to the reduction of cleaning labor and running cost, and a plurality of thin wire members are implanted at the tip of the rod body of the rod member. than only stick body that have not been set can be captured efficiently contaminants fibrous such as hair.

According to the water treatment device of the third aspect of the present invention, the foreign matter rising along the hollow fiber membrane group is guided outward by the foreign matter removing member provided in the hollow fiber module, and the rod It is entangled and captured by a plurality of thin wire members planted at the tip of the bar body of the member or bar member . Therefore, since the water to be treated can be efficiently filtered over a long period of time, the maintenance cost of the water treatment apparatus can be reduced.

  Hereinafter, a hollow fiber module according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 is a side view of a hollow fiber module according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, FIG. 3 is a front view of a contaminant removing device, and FIG. It is the B section enlarged view of FIG.

  1 is a hollow fiber module according to Embodiment 1 of the present invention, and this hollow fiber module 1 includes an upper fixing portion 2 and a lower fixing portion 4 which will be described later. These upper and lower fixing parts 2 and 4 are connected and supported by two support rods 3 orthogonal to these upper and lower fixing parts 2 and 4 at two locations near the edges of these upper and lower fixing parts 2 and 4. And is configured integrally.

Between the upper fixing portion 2 and the lower fixing portion 4, a hollow fiber membrane group 5 composed of a plurality of hollow fiber membranes in which both ends of a plurality of hollow fiber membranes are bonded is disposed inside the support rod 3. And is configured integrally with both ends of the support bar 3. The upper ends of the hollow fiber membranes constituting the hollow fiber membrane group 5 are open, and the lower ends are sealed with an adhesive. A permeate outlet (or a counter pressure washing water inlet) 2a is provided on the upper fixed portion 2 and at a central portion in the radial direction.
In addition, an air supply pipe 6 for supplying air is connected to the lower fixing section 4, and the air supplied from the air supply pipe 6 is directed toward the upper fixing section 2 and the hollow fibers of the hollow fiber membrane group 5. Air ejection holes (not shown) are provided between the membranes and on the outer periphery thereof. In other words, the air ejection holes provided in the lower fixing portion 4 are configured to perform air scrubbing of the hollow fiber membranes of the hollow fiber membrane group 5.

  On the lower surface of the upper fixing part 2, a foreign substance removing device 7 to be described later is fixed in a state where the main part is hidden in the hollow fiber membrane group 5. As shown in FIG. 2, the contaminant removing device 7 includes a rod support rod 7a having one end connected to the lower surface of the upper fixed portion 2 and the center in the radial direction. As shown in FIGS. 2 and 3, the outer periphery of the rod support rod 7 a near the lower end is directed upward toward the distal end (in the case of this embodiment 1, the inclination angle θ is set to 45 °). Eight straight sets of foreign matter removing members 7b, which will be described later, are fixed radially to the center of the rod support rod 7a in the radial direction.

  The contaminant removing member 7b has a base end fixed to the vicinity of the lower end of the rod support rod 7a, and a contaminant guide rod 7c for guiding the contaminants out of the hollow fiber membrane group, and the contaminant guide rod. The rod-insertion pipe 7d fixed to the tip of the rod 7c is configured to include a foreign substance second guide rod 7e, which will be described later, and is detachable for entrapping and capturing the foreign substance. The distal end portion of the rod fitting pipe 7d slightly protrudes from the hollow fiber membrane group 5, and the dimension L from the upper surface of the upper fixing portion 2 to the protruding portion of the rod fitting pipe 7d is set to about 20 cm. .

  The reason why the dimension L is set to about 20 cm as described above is as follows. That is, the region above the projecting portion of the rod fitting pipe 7d is a direction changing region in which the direction of the water to be treated in the water treatment tank is converted from the top to the horizontal. And the outer area | region of this direction change area | region is also a turbulent flow area | region where the flow of to-be-processed water is disturb | confused by the horizontal flow from an adjacent hollow fiber module. Therefore, it is considered that fibrous impurities such as hair can be most effectively removed in the direction changing region and the turbulent region.

  As shown in FIG. 4, the foreign substance second guide rod 7e is composed of a rod body and a hook-like stopper 7f fitted to the rod body, and the stopper 7f is a rod fitting pipe 7d. The base end side of the foreign object second guide rod 7e is configured to be fitted into the rod fitting pipe 7d until it comes into contact with the end surface of the rod. The protruding length of the contaminant second guide rod 7e from the rod fitting pipe 7d is set by the interval between the adjacent hollow fiber modules (set so that the front end does not interfere). The length is not particularly limited. By the way, in the hybrid removal apparatus 7 of the hollow fiber module 1 according to the first embodiment of the present invention, as described above, 8 sets of the contaminant removal member 7b are provided, but 9 sets or more may be provided, In particular, it is not limited to 8 sets. The hybrid removal device 7 is made of stainless steel, but may be made of plastic or the like.

  Hereinafter, the operation mode of the hollow fiber module 1 configured as described above will be described. In the hollow fiber module 1 which concerns on this form 1, fibrous impurities, such as the hair mixed in the to-be-processed water in the biological reaction tank which should be processed by purification by the compressed air which is blown in in a water treatment tank Along with the upward flow, it rises along the hollow fiber membrane group 5. Then, the rising contaminant hits the contaminant guide rod 7c of the contaminant removal member 7b, rises along the inclination of the contaminant guide rod 7c, and is guided out of the hollow fiber membrane group 5. As described above, the foreign substance second guide rod 7e above the protruding portion of the rod fitting pipe 7d is in the direction change region of the upward flow of the water to be treated and the turbulent flow region outside the direction change region. The fibrous contaminants such as hair are removed along the contaminants second guide rod 7e. That is, the foreign matter is guided by the foreign matter guide rod 7c and the foreign matter second guide rod 7e and removed from the hollow fiber membrane group 5 before being entangled with or attached to the hollow fiber membrane.

  Therefore, according to the hollow fiber module 1 according to the first embodiment of the present invention, as in the conventional example, the treatment capacity of the water to be treated is reduced due to the entanglement or adhesion of fibrous impurities such as hair. There is no such thing. Also, the foreign matter second guide rod 7e entangled with or adhering to fibrous impurities such as hair is extracted from the rod-insertion pipe 7d, and the new contaminant second guide rod 7e is removed from the rod-insertion pipe 7d. After the insertion, only the removed foreign substance second guide rod 7e needs to be cleaned, which can contribute to reduction in cleaning labor and running cost.

  The hollow fiber module according to Embodiment 2 of the present invention will be described with reference to FIG. 5 of the perspective view of the contaminant removing device. It should be noted that the second embodiment of the present invention differs from the first embodiment in the configuration of the contaminant removal apparatus, and the other configuration is exactly the same, and thus only the description of the configuration of the contaminant removal apparatus will be given.

  That is, a plurality of contaminant removal devices 8 to be described later are provided by bolts (not shown) that are passed through holes provided in the horizontal plate member at predetermined intervals in the circumferential direction near the outer edge of the upper fixing portion 2. It is fixed. The foreign matter removing device 8 includes a support bracket 8a including a horizontal plate member fixed to the upper surface of the upper fixing portion 2 by bolts, and a vertical plate member extending perpendicularly to the horizontal plate member and extending downward. . Near the lower end of the support bracket 8a, a rod-insertion pipe 8b protrudes obliquely upward (inclination angle is 45 °). The member 8c is inserted. The foreign matter removing member 8c is positioned by the stopper 8f, protrudes from the rod fitting pipe 8b, and enters the hollow fiber membrane group (not shown), and the anti-rod fitting pipe 8b side of the stopper 8f. The foreign substance second guide rod 8e.

  A hollow fiber module according to Embodiment 3 of the present invention will be described with reference to FIG. 6 which is a side cross-sectional view of the contaminant removing device and FIG. 7 which is an enlarged view of a portion C in FIG. The difference between the third embodiment and the first embodiment lies in the difference in the configuration of the contaminant removal apparatus, and the other configuration is exactly the same, so only the description of the configuration of the contaminant removal apparatus will be given.

  The hollow fiber module contaminant removal device 9 according to Embodiment 3 of the present invention is externally mounted from the upper fixed portion side of the hollow fiber module and is configured as described later. That is, the contaminant removal device 9 includes a horizontal plate member supported on the upper surface of the upper fixing portion and a vertical plate member that extends perpendicularly to the horizontal plate member and extends downward, and has a Γ-shaped support bracket 9a. It has. And the annular ring 9b which consists of a strip | belt member of predetermined width is adhering to the lower end part of this support bracket 9a. In the circumferential direction on the upper end surface side of the annular ring 9b, a plurality of rod-insertion insertion pipes 9c inclined upward are fixed at predetermined intervals, and each of these rod-insertion insertion pipes 9c is used in the above-described form 2. The foreign matter guide rod 8d side of the foreign matter removing member 8c having the same configuration as the above is inserted. In the case of the hollow fiber module contaminant removal device 9 according to the third embodiment, the diagonally upward rod fitting pipe 9c is fixed to the upper end surface side of the ring 9b, but the lower end surface of the ring 9b. It may be fixed to the side.

  A hollow fiber module according to Embodiment 4 of the present invention will be described with reference to FIG. 8 of a plan view of the contaminant removing device. Note that the fourth embodiment of the present invention differs from the first embodiment in the configuration of the contaminant removal apparatus, and the other configuration is exactly the same. Therefore, only the configuration of the contaminant removal apparatus is described.

  The foreign matter removing apparatus 10 for a hollow fiber module according to the fourth embodiment of the present invention is externally mounted from the upper fixed portion side of the hollow fiber module and is configured as described later, similarly to the third embodiment. . That is, the foreign matter removing apparatus 10 includes a horizontal plate member supported on the upper surface of the upper fixing portion and a vertical plate member that extends perpendicularly to the horizontal plate member and extends downward. It has. An annular ring 10b made of a strip member having a predetermined width is fixed to the lower end portion of the support bracket 10a. A contaminant removing member 10d, which will be described later, is attached to the ring 10b.

  The foreign matter removing member 10d includes an annular foreign matter catching net 10g having an inner diameter side fixed to an outer peripheral surface of the annular ring 10b so that the height on the outer diameter side is higher than the inner diameter side, and the annular ring 10b. Consists of a rod guide rod 10e that is inserted into a rod insertion pipe 10c that is fixed obliquely upward on the upper end surface, a stopper 10f is externally fitted in the vicinity of the end, and a tip enters a hollow fiber membrane group (not shown). Has been. Note that the mesh of the foreign matter catching net 10g may be coarse, and the interval between the lines constituting the net may be, for example, about 10 mm.

  The hollow fiber module according to the fifth embodiment of the present invention will be described with reference to FIG. 9 of the plan view of the foreign substance removing device and FIG. 10 of the arrow D view of FIG. Note that the fifth embodiment of the present invention differs from the first embodiment in the configuration of the contaminant removal apparatus, and the other configuration is exactly the same. Therefore, only the configuration of the contaminant removal apparatus is described.

  The hollow fiber module contaminant removal apparatus 11 according to the fifth embodiment of the present invention is fitted in a lateral groove provided in each of two support rods that connect and support the upper fixing portion and the lower fixing portion of the hollow fiber module. It is rarely mounted and is configured as described later. That is, the contaminant removing device 11 is formed of a flat plate having a predetermined width, and includes a pair of half-rings 11a facing the opening side. A pair of first brackets 11c is provided on one of the outer sides of the ends of the half ring 11a, and a second bracket 11d is provided on the other.

  That is, the second bracket 11d provided on the other half ring 11a is fitted between the pair of first brackets 11c provided on one half ring 11a. Moreover, the 2nd bracket 11d provided in one half ring 11a is inserted between a pair of 1st brackets 11c provided in the other half ring 11a. Next, when the connecting pin 11e is inserted into the holes opened in the first and second brackets 11c and 11d, it is formed into a circular shape, and is inserted into a lateral groove provided in each of the two support rods 3 and supported. It has become so.

  Further, in the circumferential direction on the upper end surface side of each of the pair of half-rings 11a, a plurality of bar-insertion pipes 11b inclined upward are fixed at predetermined intervals, and each of these bar-insertion pipes 11b is fixed. Further, the foreign matter guide rod 8d side of the foreign matter removing member 8c having the same configuration as that used in the second embodiment is inserted. In the case of the fifth embodiment, similarly to the foreign substance removing device of the third embodiment, the diagonally upward rod-insertion pipe 11b may be fixed to the lower end surface side of the half ring 11a.

  A hollow fiber module according to Embodiment 6 of the present invention will be described with reference to FIG. Note that the sixth embodiment of the present invention differs from the first embodiment in the configuration of the contaminant removal apparatus, and the other configuration is exactly the same, so the description is limited to the configuration of the contaminant removal apparatus.

  The hollow fiber module contaminant removal device 12 according to the sixth embodiment of the present invention is similar to the fifth embodiment in that each of the two support rods that connect and support the upper fixing portion and the lower fixing portion of the hollow fiber module. Is fitted into a lateral groove provided in the, and is configured as described later. That is, the foreign matter removing device 12 is made of a flat plate having a predetermined width and includes a pair of half-rings 12a facing the opening side. A pair of first brackets 12c is provided on one outer side of the ends of the pair of half rings 12a, and a second bracket 12d is provided on the other side.

The second bracket 12d of the other half ring 12a is fitted between the pair of first brackets 12c of one half ring 12a, and the pair of first brackets of the other half ring 12a. The second bracket 12d of one half ring 12a is fitted between 12c.
Next, the connecting pin 12e is inserted into the holes opened in the first and second brackets 12c and 12d to form a circular shape, and are inserted into the lateral grooves provided in the two support rods 3, respectively. It is configured. Furthermore, a foreign matter removing member 10d described later is attached to each of the pair of half rings 12a.

  The foreign matter removing member 10d is a half-circular foreign matter trapping net 10g whose inner diameter side is fixed to the outer peripheral surface of each of the pair of half circular rings 12a so that the height on the outer diameter side is higher than the inner diameter side. 10g and a hollow fiber (not shown), which is fitted into a rod fitting pipe 12b which is fixed obliquely upward on the upper end surface side of each of the pair of half-rings 12a, a stopper 10f is fitted around the end, and the tip is not shown. It is comprised from the foreign material guide | rod 10e which rushes into the film group.

  A hollow fiber module according to Embodiment 7 of the present invention will be described with reference to FIG. 12 of a plan view of the contaminant removing device. Since the seventh embodiment of the present invention differs from the first embodiment in the configuration of the contaminant removal apparatus, the description is limited to the configuration of the contaminant removal apparatus.

  The hollow fiber module contaminant removal device 13 according to the seventh embodiment of the present invention is mounted and mounted from the upper fixed portion side of the hollow fiber module, for example, called the blind type, and is configured as described later. ing. That is, the contaminant removing device 13 includes a horizontal plate member supported on the upper surface of the upper fixing portion, and a vertical plate member that extends at a right angle to the horizontal plate member and extends downward. It has. And the elongate rectangular frame 13b which consists of a strip member of predetermined width is adhering to the lower end part of this support bracket 13a.

  In the longitudinal direction on the upper end surface side of the rectangular frame 13b, a plurality of bar-insertion pipes 13c inclined upward are fixed at a predetermined interval, and each of these bar-insertion pipes 13c is used in the second embodiment. The contaminant guide member 8c side of the contaminant removal member 8c having the same configuration as that of the above is inserted. In addition, in the case of the contaminant removal device 13 for the hollow fiber module according to the seventh embodiment, the diagonally upward rod-insertion pipe 13c is fixed to the upper end surface side of the rectangular frame 13b, but the lower end surface of the rectangular frame 13b It may be fixed to the side.

  A hollow fiber module according to Embodiment 8 of the present invention will be described with reference to FIG. 13 of a plan view of the contaminant removing device. The difference between the eighth embodiment of the present invention and the first embodiment lies in the difference in the configuration of the contaminant removal apparatus, and thus only the description of the configuration of the contaminant removal apparatus is provided.

  The hollow fiber module contaminant removal device 14 according to the eighth embodiment of the present invention is externally mounted and mounted from the upper fixing portion side of the hollow fiber module similar to the seventh embodiment, and will be described later. It is configured as follows. That is, the contaminant removing device 14 includes a pair of bifurcated support brackets 14a straddling the upper surface of the upper fixing portion. A straight flat bar 14b made of a flat plate having a predetermined width is fixed to each of the lower ends of the pair of bifurcated support brackets 14a in a balanced manner.

  In the longitudinal direction on the upper end surface side of these flat bars 14b, a plurality of bar-inserting pipes 14c inclined upward are fixed at a predetermined interval, and the above-described configuration is provided to each of these bar-inserting pipes 14c. 2 is inserted into the foreign substance guide rod 8d side of the foreign substance removing member 8c having the same configuration as that used in FIG. In the case of the foreign matter removing device 14 for the hollow fiber module according to the eighth embodiment, the diagonally upward stick-inserting pipe 14c is fixed to the upper end surface side of the flat bar 14b. You may adhere to the lower end surface side.

  A hollow fiber module according to Embodiment 9 of the present invention will be described with reference to FIG. In addition, since the ninth embodiment of the present invention differs from the first embodiment in the configuration of the contaminant removal apparatus, only the description of the configuration of the contaminant removal apparatus will be given.

  The hollow fiber module contaminant removal device 15 according to the ninth embodiment of the present invention is externally mounted from the upper fixing portion side of the hollow fiber module of the blind type, as in the seventh and eighth embodiments. This is configured as described later. That is, the foreign matter removing device 15 includes a rubber band 15a having a predetermined width that is attached to a support rod that connects the upper fixing portion and the lower fixing portion with end portions in the longitudinal direction by applying a predetermined tension. . In the longitudinal direction of the upper end surface of the rubber band 15a, a plurality of bifurcated fittings 15b each having a bar fitting insertion pipe 15c inclined upward are fixed at a predetermined interval. The foreign matter guide rod 8d side of the foreign matter removing member 8c having the same configuration as that used in the second embodiment is inserted into each of the rod fitting pipes 15c of the tool 15b.

  In the case of the foreign matter removing apparatus of the hollow fiber module according to any of the above embodiments 2 to 9, no description is given of the operation and effect of this foreign matter removing apparatus. Fibrous contaminants such as hair that rises along the hollow fiber membrane group following the upward flow caused by the compressed air blown into the interior are guided out of the hollow fiber membrane group by the contaminant guide rod of the contaminant removal member. At the same time, it is captured by a contaminant capturing rod or a contaminant capturing net. Therefore, according to the hollow fiber modules according to these modes 2 to 9, any of the effects equivalent to the hollow fiber module according to the above mode 1 can be obtained.

  By the way, about the foreign substance 2nd guide rod of the foreign substance removal apparatus of the hollow fiber module which concerns on the above each form, it demonstrated as an example the case where all are straight. However, the present invention is not limited to this, for example, the tip of the rod body of the foreign substance second guide rod is made downward or has a U-shape, or a plurality of thin wire members are implanted at the tip part, so that the foreign substance second The tip end portion of the guide rod can be configured in an interdental brush shape. With such a configuration, unlike the case of the straight foreign matter second guide rod, it is possible to obtain an effect that it is possible to efficiently capture fibrous foreign matters such as hair. Moreover, although the cross-sectional shape of the ring or flat bar of Embodiments 3 to 8 of the present invention and the rubber band according to Embodiment 9 is a rectangular shape with a long vertical direction, it may be a square or a circle, so it is limited to a cross-sectional shape. It is not a thing.

  In the above description, a hollow fiber module having a hollow fiber membrane group including a group of hollow fiber membranes having both ends fixed by an upper fixing portion and a lower fixing portion has been described as an example. However, the present invention is not limited to this, and the present invention can also be applied to a hollow fiber module according to the above-described conventional example including a plurality of hollow fiber bundles having both ends fixed by an upper fixing portion and a lower fixing portion. Moreover, the hollow fiber module which concerns on the said form is only a specific example of this invention. Therefore, the scope of application of the technical idea of the hollow fiber module of the present invention is not limited by the above configuration, and design changes and the like can be freely made without departing from the technical idea of the present invention.

It is a side view of the hollow fiber module which concerns on form 1 of this invention. It is the sectional view on the AA line of FIG. It is a front view of a foreign substance removal apparatus according to the first embodiment of the present invention. It is the B section enlarged view of FIG. It is a perspective view of a foreign substance removal apparatus according to the second embodiment of the present invention. It is side surface sectional drawing of a contaminant removal apparatus concerning Embodiment 3 of this invention. It is the C section enlarged view of FIG. It is a top view of a foreign substance removal apparatus according to Embodiment 4 of the present invention. It is a top view of the foreign material removal apparatus concerning Embodiment 5 of this invention. It is a D arrow line view of FIG. It is a top view of a contaminant removal apparatus according to Embodiment 6 of the present invention. It is a top view of a contaminant removal apparatus according to Embodiment 7 of the present invention. It is a top view of a foreign substance removal apparatus according to Embodiment 8 of the present invention. It is sectional drawing of the contaminant removal apparatus concerning Embodiment 9 of this invention. It is a partial cross section conceptual diagram of the hollow fiber module which concerns on a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Hollow fiber module, 2 ... Upper fixed part, 2a ... Permeate outlet, 3 ... Support rod, 4 ... Lower fixed part, 5 ... Hollow fiber membrane group, 6 ... Air supply pipe line, 7 ... Contaminant removal apparatus, 7a ... Rod support rod, 7b ... Contaminant removing member, 7c ... Contaminant guide rod, 7d ... Rod fitting pipe, 7e ... Contaminant second guide rod, 7f ... Stopper 8 ... Contaminator removing device, 8a ... Support bracket , 8b ... Rod insertion pipe, 8c ... Contaminant removal member, 8d ... Contaminant guide rod, 8e ... Contaminant second guide rod, 8f ... Stopper 9 ... Contaminator removal device, 9a ... Support bracket, 9b ... Ring , 9c ... Rod fitting pipe, 8c ... Contaminant removing member, 8d ... Contaminant guiding rod, 8e ... Contaminating second guide catching rod, 8f ... Stopper 10 ... Contaminant removing device, 10a ... Support bracket, 10b ... Ring , 10c ... Rod fitting pipe, 10d ... Contaminant removing member, 10 ... Foreign matter guide rod, 10f ... Stopper, 10g ... Foreign matter trapping net 11 ... Foreign matter removal device, 11a ... Half ring, 11b ... Rod insertion pipe, 11c ... First bracket, 11d ... Second bracket, 11e ... Connecting pin, 8c ... Contaminant removing member, 8d ... Contaminant guide rod, 8e ... Contaminated second guide catching rod 12 ... Contaminant removing device, 12a ... Half ring, 12b ... Stick insertion pipe, 12c ... No. DESCRIPTION OF SYMBOLS 1 bracket, 12d ... 2nd bracket, 12e ... Connecting pin, 10d ... Contaminant removal member, 10e ... Contaminant guide rod, 10f ... Stopper, 10g ... Contaminate catching net 13 ... Contaminant removal device, 13a ... Support bracket, 13b: Rectangular frame, 13c: Bar insertion pipe, 8c: Contaminant removing member, 8d ... Contaminant guide rod, 8e ... Contaminant second guide rod 14: Contaminant removing device, 14a ... Bifurcated support bracket, 4b ... flat bar, 14c ... rod insertion pipe, 8c ... contaminant removal member, 8d ... contaminant guide rod, 8e ... contaminant second guide rod 15 ... contaminant removal device, 15a ... rubber band, 15b ... bifurcated 15c: rod insertion pipe, 8c ... contaminant removal member, 8d ... contaminant guide rod, 8e ... contaminant second guide rod, 8f ... stopper

Claims (3)

An upper fixing part that is immersed in the water to be treated supplied into the water treatment tank and fixed in a state where the upper ends of the plurality of hollow fiber membranes are opened, is located immediately below or near the lower ends of the plurality of hollow fiber membranes. A hollow fiber module having a lower fixing portion having a plurality of air ejection holes for air scrubbing, wherein the hollow fiber membrane is disposed from an inner position of a group of hollow fiber membranes fixed at both ends by the upper fixing portion and the lower fixing portion. A contaminant removing member is provided that extends obliquely upward as it moves away from the group and guides the fibrous contaminants mixed in the water to be treated to the outside of the group of hollow fiber membranes . The removing member is a rod member configured to be detachable, and a hollow fiber module characterized in that a plurality of thin-line members extending outward are planted at a tip portion of a rod body of the rod member. .   The hollow fiber module according to claim 1, wherein the contaminant removing member is provided at a position below the upper fixing portion of the hollow fiber membrane group. 3. A water treatment apparatus, wherein the hollow fiber module according to claim 1 or 2 is installed in a state in which an upper fixing portion is submerged under a surface of water to be treated.

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