KR20170127367A - Method of manufacturing flat hollow fiber membrane module, holding device for manufacturing flat hollow fiber membrane module, and flat hollow fiber membrane module - Google Patents

Abstract

The present invention provides a manufacturing method of a flat hollow fiber membrane module, a holding device for manufacturing a flat hollow fiber membrane module, and a flat hollow fiber membrane module. While relaxation is imparted to a hollow fiber membrane bundle with a simple method, the number of times of performing a resin injecting and hardening process can be reduced to once. The manufacturing method of a flat hollow fiber membrane module of the present invention comprises the processes of: arranging a pair of relaxation producing jigs (20, 20) to be separated in a longitudinal direction of a hollow fiber membrane bundle (11), and holding hollow fiber membrane bundle (11) with the relaxation producing jigs (20, 20); imparting relaxation to the hollow fiber membrane bundle (11) by narrowing a separation distance between the relaxation forming jigs (20, 20); inserting an end part of the hollow fiber membrane bundle (11) into an insertion hole of a housing (12); injecting a fixing resin into the housing (12) to be hardened to fix an end part of the hollow fiber membrane bundle (11), and fixing an end part of a pair of pillars (17, 17) to the housing (12); and detaching the relaxation producing jigs (20, 20).

Description

Field of the Invention [0001] The present invention relates to a method of manufacturing a balanced hollow fiber membrane module, a method of manufacturing a balanced hollow fiber membrane module, and a balanced hollow fiber membrane module using the hollow fiber membrane module,

The present invention relates to a method of manufacturing a hollow hollow fiber membrane module, a grasper for manufacturing a hollow hollow fiber membrane module, and a hollow hollow fiber membrane module.

Hollow fiber membrane modules are used in many applications such as the production of sterile water, drinking water, high purity water, and purification of air. Recently, in addition to these applications, the hollow fiber membrane module has been widely used for treatment of secondary treatment in a sewage treatment plant, tertiary treatment, solid-liquid separation in a septic tank, solid-liquid separation of SS (suspended matter) It is also used for filtration of water.

The hollow fiber membrane module generally has a structure in which an end of a focusing body of a hollow fiber membrane is inserted into a housing and an end portion of the hollow fiber membrane is opened and the space between the hollow fiber membrane and the housing is fixed with a resin.

When the high-turbidity water is filtered using the hollow fiber membrane module, a hollow fiber membrane unit having a plurality of hollow fiber membrane modules arranged above the air diffuser is immersed in the filtration tank. While performing the air scraping cleaning, A stable filtration process can be performed over a long period of time. The hollow fiber membrane module is usually subjected to a filtration treatment in a relaxed state in which the hollow fiber membrane is loosened to about 0.1 to 5% in the longitudinal direction, in order to improve the cleaning effect by air scraping cleaning.

As described above, as a method of forming and imparting looseness to the hollow fiber membrane module, for example, there is a method of loosening by adjusting the distance between the housings in which the end portions of the hollow fiber membrane bundle are fixed, A method of fixing the distance between the housings by a predetermined distance in advance by forming pillars between the housings.

Such a hollow fiber membrane module can be produced, for example, by the following method (see Patent Document 1).

First, a plurality of hollow fiber membranes are aligned and the ends thereof are put into a container. Subsequently, the liquid resin for fixing is injected into the container and cured, whereby the ends of the hollow fiber membrane are fixed to each other with a fixing resin to form a hollow fiber membrane focusing body (first curing step). Next, the container is taken out of the hollow fiber membrane concentrate, and the end of the hollow fiber membrane fixed with the fixing resin is cut into the resin so as to obtain a hollow fiber membrane bundle (hollow fiber membrane bundle) having open ends of the hollow fiber membranes ). Thereafter, the open end of the hollow fiber membrane bundle is inserted into the housing, the resin for adhesion is poured over the hardened fixing resin, and the hollow fiber membrane is cured to fix the hollow fiber membrane to the housing (second curing step) .

Further, for example, in the case of a configuration in which a strut is formed on a hollow fiber membrane module having the structure described in Patent Document 1, a frame body obtained by adhering a housing and a support to each other is manufactured in advance, and the end portions of the hollow fiber membranes The open hollow fiber membrane bundle is fixed in the housing. At this time, by making the length dimension of the hollow fiber membrane bundle larger than the predetermined fixed length depending on the length of the strut, it is possible to make the relaxed state in which the entire hollow fiber membrane bundle is loosened.

Japanese Laid-Open Patent Publication No. 2006-061816

However, in the conventional method of manufacturing a hollow fiber membrane module described in Patent Document 1, since the first curing step and the second curing step are required twice as a step of injecting and hardening the resin, the problem that the process becomes troublesome . Further, even in the case of a structure in which the hollow fiber membrane module as described above is formed with a strut, there is a problem that the curing process is required twice in total as in the case of Patent Document 1, and the process becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a hollow fiber membrane module in which a stranded hollow fiber membrane module is manufactured by a simple method of forming and imparting looseness to a hollow fiber membrane bundle, And to provide a method for producing a balanced hollow fiber membrane module having excellent productivity, a wave tower for producing a hollow fiber membrane module, and a balanced hollow fiber membrane module.

Means for Solving the Problems The present inventors have conducted intensive studies to achieve the above object. As a result, first, the vicinity of both end portions in the longitudinal direction of the hollow fiber membrane bundle is grasped by a pair of relaxation forming jigs, the separation distance of the relaxation forming jig is narrowed to relax the bundle of hollow fiber membranes, By employing the method of injecting the fixing resin into the housing after the end of the desert bundle is inserted and curing it, the process of curing the fixing resin can be reduced only once by giving a looseness to the bundle of hollow fiber membranes by a simple method The present invention has been accomplished on the basis of these findings.

That is, the present invention includes the following aspects.

[1] Each end of a sheet-like hollow fiber membrane bundle comprising a plurality of hollow fiber membranes is inserted and fixed into the housing from the respective insertion ports of the housing, Wherein a pair of pillars arranged at both sides of the hollow fiber membrane bundle in the longitudinal direction of the hollow fiber membrane bundle are fixed to the housing at both sides of the hollow fiber membrane in the arrangement direction of the hollow fiber membrane module, A holding step of disposing the forming jig in a longitudinal direction of the bundle of hollow fiber membranes and holding the bundle of hollow fiber membranes by the pair of loosening forming jigs; A relaxation step of imparting relaxation to the bundle of hollow fiber membranes; A fixing step of fixing an end portion of the hollow fiber membrane bundle to the housing by injecting a fixing resin into the housing and curing the hollow fiber membrane bundle to fix the end portion of the hollow fiber membrane bundle, And removing the pair of relaxation forming jigs.

[2] Each end of a sheet-like hollow fiber membrane bundle comprising a plurality of hollow fiber membranes is inserted and fixed in the housing from each of the insertion ports of the housing, Wherein a pair of pillars arranged at both sides of the hollow fiber membrane bundle in the longitudinal direction of the hollow fiber membrane bundle are fixed to the housing at both sides of the hollow fiber membrane in the arrangement direction of the hollow fiber membrane module, A holding step of disposing the forming jig in a longitudinal direction of the bundle of hollow fiber membranes and holding the bundle of hollow fiber membranes by the pair of loosening forming jigs; A relaxation step of imparting relaxation to the bundle of hollow fiber membranes; A holding step of assembling the housing, the hollow fiber membrane bundle, and the pair of struts in a frame of a holding frame body having a substantially rectangular shape when viewed in a plan view; A connecting step of connecting and securing a pair of loosening forming jigs; a step of injecting a fixing resin into the housing and curing to fix an end of the hollow fiber membrane bundle; and fixing the ends of the pair of supporting posts to the housing And a removal step of removing the retaining frame body and the pair of relaxation forming jigs.

[3] The method for manufacturing a balanced hollow fiber membrane module according to [1] or [2], wherein the relaxation-forming jig has an elastic member having a hardness of 3 to 20 degrees formed in a gripping portion for gripping the bundle of hollow fiber membranes .

[4] The method of manufacturing a balanced hollow fiber membrane module according to any one of [1] to [3], wherein the elastic member has a thickness of 2 mm or more.

[5] The tubular hollow fiber membrane module according to any one of [1] to [5], wherein the ratio (L / W) of the total width (W) of the balanced hollow fiber membrane module to the total length (L) A method for producing a balanced hollow fiber membrane module according to any one of the above [1] to [4].

[6] The method as set forth in any one of [1] to [5], wherein the ratio (L / W) of the total width (W) of the balanced hollow fiber membrane module to the total length (L) of the balanced hollow fiber membrane module in the array direction of the hollow fiber membrane is 20 to 50 times A method for producing a balanced hollow fiber membrane module according to any one of the above [1] to [4].

[7] The flat hollow fiber membrane module according to any one of the above [1] to [6], wherein the total length L of the balanced hollow fiber membrane module in the array direction of the hollow fiber membranes is in the range of 300 to 1,500 mm ≪ / RTI >

[8] The balanced hollow fiber membrane module according to any one of the above items [1] to [6], wherein the total length L of the balanced hollow fiber membrane module in the array direction of the hollow fiber membranes is in the range of 500 to 1250 mm ≪ / RTI >

[9] The balanced hollow fiber membrane module according to any one of the above [1] to [8], wherein the hollow fiber membrane bundle weight per unit area of the balanced hollow fiber membrane module is 50 g / ≪ / RTI >

[10] A method for manufacturing a balanced hollow fiber membrane module according to any one of the above [1] to [9], wherein during the time until the bundle of hollow fiber membranes is fixed to the housing by the fixing resin, And a first member and a second member that grip the bundle of hollow fiber membranes to sandwich the hollow fiber membrane bundle therebetween, and a first member and a second member that are spaced apart from each other by a distance between the first member and the second member And a holding means capable of bringing the first member and the second member close to each other so as to be smaller than the thickness of the hollow fiber membrane bundle.

[11] A method of manufacturing a hollow fiber membrane module, comprising the steps of: housing a housing having a water collecting channel on both sides of a longitudinal direction of a hollow fiber membrane, wherein both end portions of a sheet-like hollow fiber membrane bundle comprising a plurality of hollow fiber membranes are inserted Both ends of a pair of struts arranged along the bundle of hollow fiber membranes on both sides of the direction of arrangement of the hollow fiber membranes in the hollow fiber bundle are fixed to the housing through the resin Wherein both end portions of the pair of struts are respectively inserted through insertion ports of the respective housings and fixed in the housing through a fixing resin, and the hollow fiber membrane bundle is fixed in the housing And are fixed in a relaxed state between each of the housings disposed on both sides in the longitudinal direction of the hollow fiber membrane, In the transverse section when the housing is cut at a position of 30 mm from the insertion port toward the side of the collecting flow path in the housing, one kind of fixing resin is liquid-tightly packed between the hollow fiber membrane bundle and the housing , Equilibrium hollow fiber membrane module.

According to the method for producing a hollow fiber membrane module according to the present invention, after the step of imparting relaxation to the hollow fiber membrane bundle, the end of the hollow fiber membrane bundle is inserted into the housing, and thereafter the fixing resin is injected into the housing and cured It is possible to reduce the number of steps for injecting and hardening the fixing resin into one time while giving looseness to the hollow fiber membrane bundle by a simple method. Therefore, it becomes possible to manufacture a balanced hollow fiber membrane module having excellent handling properties with excellent production efficiency.

FIG. 1 is a schematic view for explaining an example of a balanced hollow fiber membrane module obtained by the manufacturing method according to the present invention, wherein (a) is an entire perspective view, and (b) and (c) are enlarged cross-sectional views.
FIG. 2 is a view schematically illustrating a first embodiment of a method for manufacturing a balanced hollow fiber membrane module according to the present invention, in which a bottom razing jig used for positioning a sheet bundle of hollow fiber membranes by raising the floor, (A) is a plan view and (b) is a side view.
Fig. 3 is a view schematically illustrating a first embodiment of a method for manufacturing a balanced hollow fiber membrane module according to the present invention, in which a first member constituting a pair of relaxation forming jigs is disposed in a gap of a bottom raising jig (A) is a plan view and (b) is a side view. Fig.
FIG. 4 is a view schematically illustrating a first embodiment of a method for manufacturing a balanced hollow fiber membrane module according to the present invention, in which a sheet-like hollow fiber membrane bundle and a sheet-like hollow fiber membrane bundle are stacked on a first member of a bottom raising jig and a pair of loosening- (A) is a plan view and (b) is a side view. Fig.
Fig. 5 is a view schematically illustrating a first embodiment of a method for manufacturing a balanced hollow fiber membrane module according to the present invention. In Fig. 5, a pair of loosening forming jigs are formed in the vicinity of both ends in the longitudinal direction of the sheet- (A) is a plan view and (b) is a partially broken schematic view of a side view of the hollow fiber membrane bundle.
FIG. 6 is a view schematically illustrating a first embodiment of a method for producing a balanced hollow fiber membrane module according to the present invention. In this method, relaxation is imparted to the hollow fiber membrane bundle by reducing the separation distance of the pair of loosening- (A) is a plan view and (b) is a partially broken schematic view seen from the side of the side.
Fig. 7 is a view schematically illustrating a first embodiment of a method for manufacturing a balanced hollow fiber membrane module according to the present invention, in which both end portions of a hollow fiber membrane bundle to which relaxation is imparted and both ends of a pair of struts are inserted into an insertion opening (A) is a plan view, and (b) is a partial broken schematic view as viewed from a side face.
Fig. 8 is a view for schematically explaining a first embodiment of a method for producing a balanced hollow fiber membrane module according to the present invention, in which a housing maintained substantially in a horizontal state, a hollow fiber membrane bundle and a pair of pillar- (A) is a plan view and (b) is a side view. Fig.
Fig. 9 is a view for schematically explaining a first embodiment of a method for manufacturing a balanced hollow fiber membrane module according to the present invention, showing in detail the pair of loosening forming jigs, wherein (a) and (b) (C) and (d) are schematic views showing a second member.

Hereinafter, the balanced hollow fiber membrane module, balanced wave hollow fiber membrane module fabrication waveguide and balanced hollow fiber membrane module according to the present invention will be described in detail with reference to FIGS. 1 to 9, with reference to the first and second embodiments. In order to facilitate understanding of the characteristics of each of the drawings used in the following description, the feature portions may be enlarged for the sake of convenience, and the dimensional ratios and the like of the respective components may be different from actual ones . In addition, the materials, dimensions, and the like exemplified in the following description are merely examples, and the present invention is not limited thereto, and can be appropriately changed without departing from the gist of the present invention.

<Equilibrium hollow fiber membrane module>

Fig. 1 schematically illustrates an example of a balanced hollow fiber membrane module obtained by a manufacturing method according to the present invention. Fig. 1 (a) is an entire perspective view, Fig. 1 (b) is a perspective view of a housing in which a bundle of hollow fiber membranes are fixed, (C) is an enlarged sectional view of a main part showing a vertical section in the vicinity of the housing in which the post is fixed; Fig.

The balanced hollow fiber membrane module 1 illustrated in Figs. 1 (a), 1 (b) and 1 (c) comprises a sheet-like hollow fiber membrane bundle 11 in which a plurality of hollow fiber membranes are bundled into a sheet, (The end in the longitudinal direction) and both ends of the pair of posts 17 (in the longitudinal direction) are fixed through the fixing resin 2 . The balanced hollow fiber membrane module 1 is configured such that the sheet-like hollow fiber membrane bundle 11 has a slight looseness (relaxation) as shown in the illustrated example.

More specifically, the balanced hollow fiber membrane module 1 has a structure in which housings 12 and 12 having water collecting flow paths 15 are provided on both sides of the hollow fiber membrane in the longitudinal direction thereof, and a plurality of hollow fiber membranes Both ends 11A and 11A of the bundle 11 are inserted into the respective insertion ports 12a of the housings 12 and 12 and fixed in the housings 12 and 12 through the fixing resin 2 . The balanced hollow fiber membrane module 1 has a pair of struts 17 and 17 disposed on both sides of the hollow fiber membrane bundle 11 in the arrangement direction of the hollow fiber membranes 11 along the hollow fiber membrane bundle 11, (17a, 17a) are respectively fixed to the housing (12).

The balanced hollow fiber membrane module 1 of the present embodiment is characterized in that both end portions 17a and 17a of the pair of pillars 17 and 17 are connected to the respective insertion ports 12a of the housings 12 and 12 And is fixed so as to be buried in the housings 12, 12 through the fixing resin 2. Further, the hollow fiber membrane bundle 11 is fixed in a relaxed state between each of the housings 12, 12 disposed on both sides in the longitudinal direction of the hollow fiber membrane. The balanced hollow fiber membrane module 1 has a structure in which the housing 12 is cut at a position of 30 mm from the insertion port 12a toward the water collecting flow path 15 side in the housing 12, One type of fixing resin 2 is filled between the bundle 11 and the housing 12 in a liquid-tight manner without an interface.

The term &quot; no interface &quot; in the present specification refers to a state where one type of fixing resin is molded by one injection of resin. On the other hand, the term &quot; having an interface &quot; refers to a state when at least one fixing resin is molded by resin injection two or more times.

Here, &quot; one resin injection &quot; means resin injection until the injected resin reaches 200,000 mPa · s.

[Hollow fiber membrane bundle]

The hollow fiber membrane bundle 11 is formed by bundling a plurality of hollow fiber membranes in the form of a bundle, and at least one end thereof is opened. The fraction level of the hollow fiber membrane used in the present invention may be any level such as a microfiltration membrane MF, an ultrafiltration membrane UF or a nanofiltration membrane NF. The pore diameter, porosity, film thickness, outer diameter and the like are not particularly limited as long as the hollow fiber membrane bundle can be used as a filtration membrane and is appropriately selected depending on the object to be filtrated. As the hollow fiber membrane bundle, ultrafiltration membranes having a molecular weight cutoff of several tens to hundreds of thousands may be used for the purpose of removing organic matter or viruses.

The hollow fiber membrane to be used in the present invention may be a hollow fiber membrane such as a cellulose resin, a polyolefin resin, a polyvinyl alcohol resin, a polysulfone resin, a polyacrylonitrile resin, a chlorine resin, Any material can be used as long as it can be formed into a shape as a shape as a whole. Specific examples of such a material include polyethylene, polypropylene, polyvinyl chloride, polyvinylidene fluoride, polytetrafluoroethylene, and polysulfone.

As the surface property of the hollow fiber membrane, it is preferable to use a resin having high chemical resistance, and specifically, a fluorine resin is preferably used. Of the fluorine-based resins, vinylidene fluoride resins are more preferably used from the viewpoints of adhesion to the hollow fiber membrane and chemical resistance. Here, examples of the vinylidene fluoride resin include a homopolymer of vinylidene fluoride, a copolymer of vinylidene fluoride and a monomer copolymerizable therewith, and the like. Examples of such a copolymerizable monomer include vinyl fluoride, ethylene tetrafluoride, ethylene trifluoride, and hexafluoropropylene.

The hollow fiber membrane has a plurality of pores. The pores are preferably continuous holes passing through the surface and the back surface of the hollow fiber membrane. The pore diameter of the pores may be arbitrarily selected depending on the purpose, and for example, it is preferably 0.01 to 5 mu m, more preferably 0.1 to 1 mu m.

The hollow fiber membrane preferably has a two-layer structure. It is more preferable that the hollow fiber membrane has an asymmetric structure in which the hole diameter of one layer surface is small and the hole diameter of the other layer surface is large. When the hollow fiber membrane has an asymmetric structure, the pore diameter of the surface of one layer is preferably more than 1 times and not more than 100 times, more preferably not less than 2 times and not more than 10 times the pore diameter of the other layer surface.

The outer diameter of the hollow fiber membrane is preferably, for example, 0.1 to 5 mm, more preferably 0.5 to 3 mm.

The hollow fiber membrane preferably has a pure water permeability coefficient of from 1 to 250 m 3 / m 2 / hr / ㎫, and more preferably from 10 to 150 m 3 / m 2 / hr / ㎫, The pure water permeability coefficient can be obtained by the following formula (1).

(1): Pure permeation coefficient = [pure water permeation amount (m 3)] / [surface area of porous membrane (m 2)] / [permeation time (hour)] / [pure water pressure (MPa)]

Examples of the hollow fiber membrane bundle include those in which at least one end of the sheet-like hollow fiber membrane aligned in one line is fixed with an adhesive or the like, and the membrane is laminated to several tens of sheets. As the hollow fiber membrane bundle, for example, a hollow fiber membrane made of a weft yarn may be used. Such a method of manufacturing a letter is disclosed in, for example, Japanese Patent Application Laid-Open Nos. 62-57965 and 1-266258. As the hollow fiber membrane bundle, a bundle of a plurality of hollow fiber membranes may be employed.

The arrangement direction of the hollow fiber membranes 11 in the hollow fiber membrane bundle 11 is not particularly limited, but it is preferable that the hollow fiber membranes are arranged substantially parallel to the flow direction of the liquid to be treated. In such a case, for example, in the case where the liquid to be treated contains a large amount of contaminants, there is no obstacle such as a hollow fiber membrane perpendicular to the flow direction when the contaminants pass between the plurality of hollow fiber membranes , The effect of reducing the deposition or entanglement of the contaminants into the hollow fiber membrane can be obtained.

The arrangement direction of the hollow fiber membrane is preferably such that the longitudinal direction of the hollow fiber membrane is the vertical direction, that is, the vertical direction. In this case, for example, the upward flow direction of the liquid to be treated, which is generated at the time of air bubbling cleaning, which is frequently used for cleaning the impurities, and the direction in which the hollow fiber membranes are continuously present can be made substantially parallel, A synergistic effect with the effect of preventing accumulation of impurities is obtained.

[housing]

As shown in Figs. 1 (a), 1 (b) and 1 (c), the housing 12 supports the entire hollow fiber membrane module 1 and is subjected to filtration treatment in the hollow fiber membrane bundle 11 In the illustrated example, the pair of hollow fiber membrane bundles 11 are formed at both ends in the longitudinal direction of the hollow fiber membrane bundle 11. As shown in Figs. 1 (b) and 1 (c), the housing 12 of the illustrated example has a tubular shape and includes a sheet-like hollow fiber membrane bundle 11 and a pair of struts 17, (Hereinafter referred to as a vertical section) in the direction perpendicular to the longitudinal direction is U-shaped.

The hollow fiber membrane bundle 11 is inserted from the insertion port 12a toward the bottom portion 13 side of the housing 12 and the opening end face 11a thereof is opened in the housing 12, Is fixed by the fixing resin (2). Concretely, a hollow portion formed in the longitudinal direction of the housing 12 so as to be surrounded by the bottom portion 13 of the housing 12 and the opening end face 11a of the hollow fiber membrane bundle 11 and the fixing resin 2 And the open end face 11a of the hollow fiber membrane bundle 11 is opened in the water collecting flow path 15. [ A housing 12 shown in Fig. 1 (a) is provided with a collecting port 16 for collecting the treated water collected in the collecting passage 15 on a part of the housing side surface 14.

The open end face 11a of the hollow fiber membrane bundle 11 in the illustrated example is disposed so as to be flush with the surface of the fixing resin 2 on the side of the water collecting flow path 15, It is preferable to dispose it so as to protrude from the fixing resin 2 toward the inside in view of water collecting efficiency and the like.

The material of the housing 12 is not particularly limited but may be any material having mechanical strength and durability. For example, the housing 12 may be made of polycarbonate, polysulfone, polyolefin, PVC (polyvinyl chloride), acrylic resin, ABS resin, (Polyphenylene ether) and the like can be used. When the hollow fiber membrane module after use is required to be incinerated, a hydrocarbon resin such as polyolefin is preferably used, which is capable of completely burning without generating toxic gas during combustion.

[Landlord (pair of landlords)]

As shown in Figs. 1 (a) and 1 (c), a pair of struts 17 and 17 are formed into a bar shape (tubular shape) connecting two ends of a pair of housings 12 and 12 The legs 17 and 17 maintain the uniform spacing between the pair of housings 12 and 12 and maintain the shape of the whole balanced hollow fiber membrane module 1. [ As a result, the surface morphology of the sheet-like hollow fiber membrane bundle 11 is maintained, thereby forming a hollow fiber membrane module as a whole. Thus, by providing the pair of pillars 17 and 17 in the balanced hollow fiber membrane module 1, it is possible to manufacture, transport and store the balanced hollow fiber membrane module 1, and assemble / The handling property at the time of use is improved. With this configuration, it is also possible to simplify the structure of the hollow fiber membrane unit.

The material and the shape of the pair of pillars 17 and 17 are not particularly limited and may be appropriately selected regardless of the metallic material or the resin material, taking into account the mechanical strength, mechanical durability and chemical durability of the balanced hollow fiber membrane module 1 have.

In view of the above, when a metal material is used for the material of the pair of pillars 17, 17, it is preferable to use, for example, a stainless steel material from the viewpoint of corrosion resistance. When a resin material is used for the pair of pillars 17 and 17, for example, polycarbonate, polysulfone, polyolefin, PVC (polyvinyl chloride), acrylic resin, ABS resin, or modified PPE Phenylene ether) and the like can be used.

In addition, the shape of the pair of pillars 17, 17 may be circular or rectangular, and may have a rod shape or a tubular shape (pipe shape).

When the tubular members are used for the pair of pillars 17 and 17, as shown in Fig. 1 (c), by communicating with the water collecting passage 15 in the housing 12, It is also possible to provide a function as a water pipe between the housings 12,

[Fixing Resin]

Examples of the fixing resin 2 for fixing the hollow fiber membrane bundle 11 and the pair of pillars 17 and 17 to the housings 12 and 12 include epoxy resin, unsaturated polyester resin, or polyurethane A thermosetting resin such as a resin is preferably used.

It is preferable that the viscosity of the fixing resin (2), that is, the initial viscosity at the time of filling the fixing resin (2) is as small as possible, particularly from the viewpoint of filling the gap between the hollow fiber membranes. On the other hand, if the initial viscosity is too small, the hollow portion of each hollow fiber membrane tends to be occluded by the fixing resin. From this point of view, the initial viscosity of the fixing resin 2 is preferably 100 mPa · s or more, more preferably 200 mPa · s or more, still more preferably 250 mPa · s or more, and preferably 5000 mPa 占 퐏, more preferably not more than 3000 mPa 占 퐏, still more preferably not more than 1000 mPa 占 퐏.

In the balanced hollow fiber membrane module 1 according to the present invention, the hardness of the hardening resin 2 after curing is measured by using a Type A durometer according to JIS K 6253, and Shore A hardness after 10 seconds Preferably in the range of 80 to 99 degrees.

By setting the hardness of the fixing resin 2 to be relatively high after curing, the rigidity of the housing 12 filled with the fixing resin 2 and the fixing resin 2 is secured, . In particular, if the Shore A hardness after 10 seconds is 80 degrees or more, sufficient pressure resistance can be ensured with a smaller amount of resin, so that the amount of the fixing resin 2 can be reduced and the cost of the balanced hollow fiber membrane module 1 can be reduced . On the other hand, if the Shore A hardness after 10 seconds is 99 degrees or less, cracking of the fixing resin 2 can be suppressed.

As described above, in the balanced hollow fiber membrane module 1 of the present embodiment, when the housing 12 is cut at a position of 30 mm from the insertion port 12a toward the water collecting flow path 15 side in the housing 12 One type of fixing resin 2 is filled between the hollow fiber membrane bundle 11 and the housing 12 in a liquid-tight manner without an interface. The configuration in which one type of fixing resin 2 is filled with liquid tightly without an interface can be achieved by filling the fixing resin 2 in the housing 12 with the fixing resin 2 Is injected into the hollow fiber membrane bundle 11 and the housing 12 to fill one kind of fixing resin 2 therebetween. Thus, in the balanced hollow fiber membrane module according to the present embodiment, the hollow fiber membrane bundle 11 is firmly fixed in the housing 12.

The fixing resin for fixing the hollow fiber membrane bundle 11 and the fixing resin for fixing the pair of pillars 17 and 17 may be made of different resins.

[Dimensions of Balanced Hollow Fiber Membrane Module]

The balanced hollow fiber membrane module 1 obtained by the method for producing a balanced hollow fiber membrane module according to the present invention is characterized in that the ratio (L / W) of the total width (W) to the total length (L) shown in FIG. To 60 times, and more preferably 20 to 50 times. The ratio (L / W) of the total width (W) of the hollow fiber membrane module 1 to the total length L of the hollow fiber membrane module 1 in the arrangement direction of the hollow fiber membrane 1 is set in the above range, The predetermined size and shape of the desert module can be maintained, resulting in excellent filtration performance and excellent handling properties.

In the balanced hollow fiber membrane module 1 obtained by the manufacturing method of the present embodiment, it is preferable that the total length L in the arrangement direction of the hollow fiber membranes shown in Fig. 1 (a) is in the range of 300 to 1500 mm , And more preferably in the range of 500 to 1250 mm. By setting the total length L of the balanced hollow fiber membrane module 1 in the arrangement direction of the hollow fiber membranes within the above range, the predetermined dimensions and shapes are maintained similarly to the above, and the filtration performance and handling property are excellent.

[Relaxation rate of hollow fiber bundle]

The hollow fiber membrane module 1 according to the present invention is characterized in that the hollow fiber membrane bundle 11 and the pair of struts 17 and 17 are fixed to the housings 12 and 12, The relaxation rate is defined by the following equation (1).

Relaxation ratio (%) = {(length of bundle of hollow fiber membranes) - (distance between respective housings)} / {distance between housings}

The relaxation rate of the hollow fiber membrane bundle 11 represented by the above formula (1) is preferably 0.1 to 5%, more preferably 0.3 to 3%, and still more preferably 0.5 to 1.5%. If the relaxation rate of the hollow fiber membrane bundle 11 is smaller than the lower limit described above, the yarn is less likely to swing and the physical cleaning property due to aeration may be lowered. On the other hand, if the relaxation rate of the hollow fiber membrane bundle 11 exceeds the upper limit, entanglement of the yarn occurs and it becomes difficult to fluctuate and the physical cleaning property by aeration is lowered similarly to the above.

<Manufacturing Method of Balanced Hollow Fiber Membrane Module (Paragraph for Fabrication of Balanced Hollow Fiber Membrane Module)>

[First Embodiment]

The method of manufacturing the balanced hollow fiber membrane module of the present embodiment is a method of manufacturing the balanced hollow fiber membrane module 1 as illustrated in Figs. 1 (a) to 1 (c). That is, in the manufacturing method of the present embodiment, each end 11A of the sheet-like hollow fiber membrane bundle 11 having the housing 12 having the water collecting channel 15 and composed of a plurality of hollow fiber membranes is connected to the housing The hollow fiber membrane bundle 11 is inserted and fixed in the housing 12 from the respective insertion ports 12a of the hollow fiber membrane bundles 11 and 12 on both sides in the direction of arrangement of the hollow fiber membranes 11, And the end portions 17a of the pair of pillars 17 and 17 are fixed to the housing 12. The hollow fiber membrane module 1 shown in Fig.

The manufacturing method of the present embodiment is a method including at least the following steps (1) to (5).

(1) A pair of loosening forming jigs 20 and 20 are disposed apart from each other in the longitudinal direction of the hollow fiber bundle 11 and the hollow fiber bundle 11 is wound around a pair of loops And the holding jig (20, 20).

(2) A relaxation process for imparting relaxation to the hollow fiber membrane bundle 11 by narrowing the separation distance of the pair of relaxation forming jigs 20, 20.

(3) Insertion process of inserting the end portion 11A of the hollow fiber membrane bundle 11 into the insertion port 12a of the housing 12.

(4) The fixing resin 2 is injected into the housing 12 and cured to fix the end portion 11A of the hollow fiber membrane bundle 11. The ends 17a of the pair of pillars 17, ) To the housing (12).

(5) The removal process of removing the pair of relaxation forming jigs 20, 20.

Hereinafter, each of the above steps will be described with reference to corresponding drawings.

(1) Holding process

In the grasping process, as described above, the pair of relaxation forming jigs 20 and 20 are disposed apart from each other in the longitudinal direction of the hollow fiber membrane bundle 11, and the hollow fiber membrane bundle 11 is sandwiched between the pair of loosening- (20, 20).

In the manufacturing method according to the present embodiment, the bottom razing jig 40 as shown in Figs. 2 (a) and 2 (b) is placed on the workbench before the holding step.

The bottom raging jig 40 has a gap portion 41 in which a pair of relaxation forming jigs 20 and 20 to be described later are disposed in a slender and long groove shape. In the illustrated example, (See also Figs. 3 (a) and 3 (b)). The bottom razing jig 40 used in the present embodiment is configured such that the relative positional relationship between the respective components of the balanced hollow fiber membrane module 1 is larger than the relative positional relationship when the finished product of the balanced hollow fiber membrane module 1 is placed flat The relationship is roughly the same.

The bottom lasing jig 40 of the illustrated example is formed to have a width smaller than that of the gap portion 41 in the width direction in Figs. 2A and 2B, considering the installation of the housing 12 in the insertion step The portion disposed on the outer side is lower in height than the portion disposed on the center.

The bottom lasing jig 40 of the illustrated example has a pair of loosening forming jigs 40 so that the groove-like gaps 41 can impart relaxation to the hollow fiber membrane bundle 11 in a later- Shaped jig 20 disposed on the right side in the width direction in Figs. 3 (a) and 3 (b) of the hollow fiber membrane bundles 20 and 20 is made into a shape and dimensions capable of sliding movement in the longitudinal direction of the hollow fiber membrane bundle 11 (See also Figs. 6 (a) and 6 (b)).

The material of the bottom razing jig 40 is not particularly limited, but it may be made of, for example, a foamed resin such as polystyrene.

As shown in Figs. 9 (a) to 9 (d), a pair of relaxation forming jigs (balanced hollow fiber membrane module fabrication waveguides) 20 and 20 used in the present embodiment are constituted by a first member (21) and a second member (22). The relaxation-forming jig 20 is provided with a desired relaxation time in the hollow fiber membrane bundle 11 until the hollow fiber membrane bundle 11 is fixed to the housing 12 by the fixing resin 2 in a fixing step The state is maintained and maintained. The relaxation forming jig 20 of the illustrated example grasps the hollow fiber membrane bundle 11 so that the first member 21 and the second member 22 come close to each other to sandwich the hollow fiber membrane bundle 11 between the first member 21 and the second member 22. [ (Holding means) 26 capable of bringing the first member 21 and the second member 22 close to each other such that the distance between the first member 21 and the second member 22 becomes smaller than the thickness of the hollow fiber membrane bundle 11 .

The first member 21 is composed of a base material 23, a spacer 24 and an elastic member (grip portion) 25 as shown in Figs. 9 (a) and 9 (b). As shown in Figs. 3A and 3B and Figs. 4A and 4B, the first member 21 is held in the vicinity of both ends 11A and 11A of the hollow fiber membrane bundle 11, It is previously arranged and used in the gap portion 41 of the bottom raising jig 40 in advance.

The base material 23 is a long member having a substantially U-shaped cross section and serving as the base of the first member 21. [ A bolt insertion hole 23b for fixing the spacer 24 with the bolt 26 is formed in the base material 23.

The material of the base material 23 is not particularly limited. When the first member 21 and the second member 22 are connected and fixed, that is, when the hollow fiber membrane bundle 11 is gripped by the loosening forming jig 20 Forming jig 20 is suppressed by the reaction force of the hollow fiber membrane bundle 11 and the material having sufficient mechanical strength to support the weight of the hollow fiber membrane bundle 11 is appropriately selected Needs to be. As the material used for the base material 23 having such a mechanical strength, for example, a stainless steel material and the like can be mentioned.

The spacer 24 is a member formed on the upper surface 23a side of the base material 23 having a substantially U-shaped cross section and when the first member 21 and the second member 22 are combined and fixed, And functions as a stopper for securing an interval equal to or longer than the above. Thereby, it is possible to prevent the hollow fiber membrane bundle 11 from being scratched when the hollow fiber membrane bundle 11 is gripped by the relaxation forming jig 20. The spacer 24 is fixed to the base material 23 and further includes a bolt insertion hole 24a for fastening the second member 22 and the bolt 26 together Respectively.

The material of the spacer 24 is not particularly limited. For example, a resin material excellent in workability and excellent in mechanical strength such as a polyacetal resin can be used.

The elastic member 25 has a function of uniformly applying a surface pressure to the irregularities when grasping the hollow fiber membrane bundle 11 having irregularities on the surface. For example, when the hollow fiber membrane bundle is gripped without forming the elastic member in the relaxation forming jig, there is a possibility that the position of the membrane bundle may be shifted when the hollow fiber membrane is broken or the gripping force is weakened.

The material, thickness, and hardness of the elastic member 25 are not particularly limited, but may be appropriately selected depending on the width, thickness, weight, etc. of the hollow fiber membrane bundle 11 which is a fibrous material.

As the material of the elastic member 25, an elastic body is preferable in that the degree of change of the amount of deflection is large. Examples of the elastic body include various rubber (urethane rubber, silicone rubber, fluorine rubber, natural rubber, butyl rubber, ethylene propylene rubber, chloroprene rubber and the like), sponge made of various kinds of rubber, flexible polyurethane, flexible polyvinyl chloride , Or a foam (polyethylene, polystyrene, ethylene-vinyl acetate copolymer, etc.), and are selected from various rubber materials and sponge materials.

The hardness of the elastic member 25 is preferably from 1 to 30 degrees, more preferably from 3 to 20 degrees, and most preferably from 5 to 10 degrees, in terms of a sponge hardness using an as- cary C type hardness meter conforming to SRIS 0101 desirable. When the hardness of the elastic member 25 is within this range, scratches do not occur on the hollow fiber membrane bundle 11, and it is possible to securely grasp the hollow fiber membrane bundle 11.

The thickness of the elastic member 25 is preferably 2 mm or more, more preferably 2 to 30 mm, further preferably 3 to 20 mm, and more preferably 5 to 20 mm, in consideration of holding the hollow fiber membrane bundle 11. [ 10 mm is most preferable. When the thickness of the elastic member 25 is within the above range, scratches do not occur on the hollow fiber membrane bundle, and it is possible to securely grasp the hollow fiber membrane bundle.

In the manufacturing method according to the present invention, when the hollow fiber membrane bundle 11 gripped by the relaxation forming jig 20 is very light, the elastic member 25 described above can be omitted.

9 (c) and 9 (d), the second member 22 is a long member having a substantially U-shaped cross section similar to the base material 23 of the first member 21, and has a lower surface 22a, And the elastic member 25 of the first member 21 by sandwiching the hollow fiber membrane bundle 11 therebetween. The second member 22 is formed with a bolt insertion hole 22b for fixing with the bolt 25 in combination with the first member 21.

The second member 22 is made of a material having sufficient mechanical strength to support the weight of the hollow fiber membrane bundle 11 while suppressing warpage similarly to the base material 23 of the first member 21, It is preferable to use a stainless steel material or the like.

The both ends of the first member 21 in the lengthwise direction of the base material 23 and the both ends in the longitudinal direction of the second member 22 become the connecting portions 23A and the connecting portions 22A respectively, As described above, when the hollow fiber membrane bundle 11 is held by the relaxation forming jig 20 and is mounted on the support 17, this position is fixed by, for example, a vise.

The relaxation forming jig 20 is attached to at least one of the first member 21 or the second member 22 by a holding frame 30 (see Figs. 8 (a) and 8 (see Fig. 5 (b)), and a bolt insertion hole or the like not shown. Here, in the case where the connecting portion is formed on the first member 21, the position is set near the longitudinal ends of the base member 23, and when the connection member is formed on the second member 22, (22).

 3 (a) and 3 (b), after the bottom raising jig 40 as described above is prepared in the gripping step of the present embodiment, two gap portions The first members 21 and 21 constituting the pair of relaxation forming jigs 20 and 20 are set apart from each other.

4A and 4B, a predetermined number of hollow fiber membrane bundles 11 and a pair of struts 17 and 17 are attached to the bottom raising jig 40 and the first member 21 In a predetermined position. At this time, the setting position can be adjusted according to the entire length of the hollow fiber membrane bundle 11 by drawing ruled lines 42 based on the desired value in advance on the surface of the bottom raising jig 40.

In this way, when the setting position of the hollow fiber membrane bundle 11 is previously indicated by a ruled line, for example, the hollow fiber membrane bundle 11 is placed substantially horizontally on the bottom raising jig 40, The ruled lines of various positioning lines 42 are drawn on the upper surface 40a of the hollow fiber membrane bundle 40 in accordance with the length in which the hollow fiber membrane bundle 11 is not relaxed and the length considering the relaxation.

Next, as shown in Figs. 5 (a) and 5 (b), the second members 22 and 22 are set so as to sandwich the hollow fiber membrane bundle 11 between the first members 21 and 21, The bolt insertion hole 23a of the base member 23 and the bolt insertion hole 24a of the spacer 24 and the bolt insertion hole 22b of the second member 22 are tightened together with the bolts 26 And the hollow fiber membrane bundle 11 is gripped. In the illustrated example, the spacers 24 are formed in four locations on the first member 21 in total, and are tightened together by the bolts 26 at these four positions.

The grasping position of the hollow fiber membrane bundle 11 at this time may be a position slightly closer to the center of the hollow fiber membrane bundle 11 in the vicinity of both ends 11A in the longitudinal direction of the hollow fiber membrane bundle 11, as shown in the illustrated example. In addition, in the holding step, the hollow fiber membrane bundle 11 is not loosened nor grasped, and is gripped without imparting an excessively large tension. In addition, in the holding step, it is desirable to take care that the spacer 24 does not come in contact with the hollow fiber membrane bundle 11.

Thereafter, in one of the pair of relaxation forming jigs 20 and 20 in the holding step, in the example shown in Figs. 5 (a) and 5 (b), the relaxation forming jig 20 on the right- At least one of the connecting portion 23A or the connecting portion 22A formed on the pair of pillars 17, 17 is fixed by using a vise or the like.

The thickness of the hollow fiber membrane bundle 11 at the position gripped by the relaxation forming jig 20 is not particularly limited in the holding step of the present embodiment, but the hollow fiber membrane bundle 11 is not scratched , And from the viewpoint of grasping securely, it may be adjusted to be about 15 mm.

The hollow fiber membrane bundle weight per unit area of the balanced hollow fiber membrane module 1 held by the grip portion of the pair of relaxation forming jigs 20 and 20, that is, the elastic member 25 is preferably 50 g / g / cm &lt; 2 &gt;. If the hollow fiber membrane bundle weight per unit area of the balanced hollow fiber membrane module 1 is less than the above range, scratches do not occur on the hollow fiber membrane bundle, and it is possible to securely grasp the hollow fiber membrane bundle.

(2) Relaxation process

Next, in the relaxation process, either one of the pair of relaxation forming jigs 20, 20 holding the vicinity of both ends 11A of the hollow fiber membrane bundle 11 in the holding step is moved to narrow the separation distance Thereby forming and imparting relaxation to the hollow fiber membrane bundle 11.

Specifically, in one of the pair of relaxation forming jigs 20 and 20 and the example shown in Figs. 6 (a) and 6 (b), the relaxation forming jig 20 disposed on the right in the widthwise direction (See the arrow R shown in Fig. 6 (b)) in the longitudinal direction of the hollow fiber membrane bundle 11 in the gap portion 41 of the jig jig 40 to narrow the gap distance. As a result, the hollow fiber membrane bundle 11 is slightly loosened (loosened).

Thereafter, in the relaxation process, the other of the pair of relaxation forming jigs 20, 20, that is, the connection portion (not shown) formed in the relaxation forming jig 20 on the left in the width direction in Figs. 23A or the connecting portion 22A is fixed to the pair of pillars 17, 17 by using a vise or the like.

In the present embodiment, even in the relaxation step, the gap between the pair of loosening jigs 20 and 20 is formed on the upper surface 40a of the bottom raising jig 40 in advance on the basis of the positioning line 42 drawn with a ruled line The distance can be determined appropriately.

(3) Insertion process

Next, in the inserting step, the end portions 11A and 11A of the hollow fiber membrane bundle 11 to which relaxation is imparted in the relaxation process are inserted from the insertion ports 12a and 12a of the pair of housings 12 and 12, do.

Specifically, as shown in Figs. 7 (a) and 7 (b), the respective end portions 11A of the hollow fiber membrane bundle 11 are inserted from the insertion ports 12a of the respective housings 12 to a predetermined position do. In the example described in the present embodiment, the end portions 17a and 17a of the pair of struts 17 and 17 are also inserted from the insertion ports 12a and 12a of the pair of housings 12 and 12 , Respectively, to a predetermined position. At this time, the end portions 17a of the respective struts 17 can be joined to each other at predetermined positions in the housing 12 by using an adhesive or a screw, or by fitting.

When the column 17 is used as the column 17 and the column 17 is connected to the water collecting passage 15 in the housing 12 as required, the column 17 is connected to the mounting portion 15a of the water collecting passage 15 (See Fig. 1 (c)). The connection between the struts 17 and the mounting portions 15a is performed by a method such as the above-described bonding, screwing, or fitting (liquid tight sealing to such an extent that the fixing resin 2 does not leak)). It is preferable that the connecting portion between the support 17 and the mounting portion 15a be embedded in the fixing resin 2 in the fixing step described later from the viewpoint of further improving the mechanical strength. In this case, it is preferable that at least a part of the surface of the portion of the pillars 17 buried in the fixing resin 2 is provided with a convexo-concave shape of, for example, a screw shape or an embossed shape, . The portion of the pillars 17 buried in the fixing resin 2 is subjected to surface treatment such as blasting, flame treatment, or plasma treatment, for example, .

In order to improve the workability in inserting the hollow fiber membrane bundle 11 having a plurality of hollow fiber membranes into the insertion port 12a of the housing 12, a hollow fiber membrane bundle 11, for example, The insertion step may be carried out while being interposed between the housing 12 and the housing 12. After the inserting process is completed, the vinyl sheet may be removed.

In the present embodiment, an example is described in which the inserting step is performed after the relaxation step. However, the present invention is not limited to this, and the inserting step may be performed before the relaxation step. However, from the viewpoint that there is no positional deviation in the hollow fiber membrane bundle 11 and it is not necessary to move the hollow fiber membrane bundle 11 in the housing 12 at the time of forming the relaxation, desirable.

(4) Fixing process

Next, in the fixing step, the fixing resin 2 is injected into the housing 12, into which the end portion 11A of the hollow fiber membrane bundle 11 is inserted in the inserting step, And the end portions 17a of the pair of struts 17 and 17 are fixed to the housing 12 (see Figs. 1 (a) to (c)). The ends 17a of the pair of struts 17 and 17 inserted into the housing 12 in the insertion step are also inserted into the fixing resin 2 in the same manner as the hollow fiber membrane bundle 11 .

Concretely, first, a holding spacer (not shown) made of a water-soluble resin or the like is provided on the bottom portion 13 in the housing 12. The holding spacers are arranged to communicate the interior of the hollow fiber membrane bundle 11, the water collecting flow path 15 and the water collecting port 16 after the fixing resin 2 is cured and are water-soluble, that is, Such as, for example, water, ethanol, isopropanol and mixed solvents thereof). As the holding spacers, those molded in accordance with the size of the water collecting passage 15 may be used. For example, a blow molded article having a thin tubular shape can be easily removed after the fixing resin 2 is cured .

Examples of the water-soluble resin include water-soluble polymers such as guar gum, locust bean gum, quince seed gum, carrageenan, pectin, mannan, starch and agar; Microbial polysaccharides such as xanthan gum, succinoglycan, curdlan, hyaluronic acid, and dextran; Plant proteins such as gelatin, casein, albumin, and collagen; Celluloses such as methyl cellulose, ethyl cellulose, hydroxy cellulose, hydroxypropyl cellulose, carboxymethyl cellulose, cationic cellulose, and hydrophobic cellulose; Starches such as solubilized starch and carboxymethyl starch, and alginic acid type such as propylene glycol alginate; Other polysaccharide derivatives; Clay minerals, inorganic substances such as silica; Vinyl resins such as polyvinyl alcohol (PVA), polyvinyl pyrrolidone, carboxyvinyl polymer (polyacrylic acid), polyacrylamide and derivatives thereof; Ether-based ones such as polyethylene glycol and polyethylene oxide-polypropylene oxide block copolymer; And combinations thereof.

Subsequently, the intermediate product consisting of the housing 12, the hollow fiber membrane bundle 11 and the strut 17 is set up in a standing posture in which the housing 12 is vertically disposed, In the manufacturing method according to the present embodiment, since the housing 12 and the struts 17 are fixed at a predetermined bonding force by performing the inserting step before the fixing step, the housing 12 assembled in the inserting step, It is possible to suppress the occurrence of positional deviation or the like when the intermediate article made up of the supporting member 11 and the support 17 is set in the upright posture.

Next, the uncured hardening resin 2 is filled from the insertion port 12a onto the holding spacers (not shown) so as to spread between the outer surface of the hollow fiber membrane bundle 11 and the inner surface of the housing 12. As a method of filling the fixing resin 2 at this time, for example, in addition to the method using a centrifugal force, the fixing resin 2 is sufficiently spread between a plurality of hollow fiber membranes constituting the hollow fiber membrane bundle 11 , And a method of opening the hollow fiber membrane bundle 11 by blowing air or the like to the hollow fiber membrane bundle 11 is preferably used in combination.

Next, the fixing resin 2 is heated and cured to fix the end portion 11A of the hollow fiber membrane bundle 11 and the end portion 17a of the strut 17 in the housing 12 (Figs. 1 (b) and 1 (c)).

Thereafter, for example, an aqueous solvent is poured into the tubular holding spacers to dissolve the retaining spacers, and then the aqueous solvent is removed so that the inside of the hollow fiber membrane and the water collecting channel 15 are communicated with each other.

In the fixing step, the intermediate product composed of the housing 12, the hollow fiber membrane bundle 11 and the strut 17 is vertically inverted to dispose the other housing 12 downward, After the fixing resin 2 is filled and cured, the same treatment as described above for removing the holding spacers is performed.

In the fixing step of the present embodiment, the holding spacers are used as a method for communicating the interior of the hollow fiber membrane bundle 11, the water collecting flow path 15 and the water collecting port 16 after the fixing resin 2 is cured However, the present invention is not limited to this. For example, means using an inner wall member described in Japanese Patent Application Laid-Open No. 2010-247023 may be employed.

(5) Removal process

Next, in the removing step, the pair of loosening forming jigs 20, 20 are removed from the completed balanced hollow fiber membrane module 1.

Although a detailed illustration is omitted, by separating the pair of relaxation forming jigs 20 and 20 from the hollow fiber membrane bundle 11 and the pair of pillars 17 and 17, Thereby obtaining a balanced hollow fiber membrane module 1 as shown in Fig.

(Action effect)

As described above, according to the first embodiment of the manufacturing method of the balanced hollow fiber membrane module according to the present invention, the hollow fiber membrane bundle 11 in which the pair of pillars 17, 17 are arranged on both sides in the arrangement direction of the hollow fiber membranes, A step of inserting at least the end 11A of the hollow fiber membrane bundle 11 into the housing 12 and a step of injecting and curing the fixing resin 2 into the housing 12, By adopting the method of fixing the end portion 11A of the hollow fiber membrane bundle 11 and fixing the end portion 17a of the pair of struts 17 and 17 to the housing 12, The bundle 11, the housing 12, and the strut 17 can be provided to the fixing process in a state in which they are maintained in the same relative positional relationship as the finished product. As a result, the step of injecting and hardening the fixing resin 2 can be reduced only once by giving a loosening to the hollow fiber membrane bundle 11 by a simple method. Therefore, it becomes possible to manufacture the balanced hollow fiber membrane module 1 with excellent handling efficiency with excellent production efficiency.

In this embodiment, as the balanced hollow fiber membrane module 1, the housing 12 is connected to both ends of the sheet-like hollow fiber membrane bundle 11. However, the sheet-like hollow fiber membrane bundle 11 ) May be connected to the housing 12 only at one end and the other end may be closed.

[Second Embodiment]

A second embodiment of a method of producing a balanced hollow fiber membrane module according to the present invention will be described with reference to the drawings appropriately. In the present embodiment, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the same drawings are used, and a detailed description thereof will be omitted.

The method of manufacturing the balanced hollow fiber membrane module of the present embodiment is a method of manufacturing the balanced hollow fiber membrane module 1 as shown in Figs. 1 (a) to 1 (c), as in the first embodiment.

The manufacturing method of the present embodiment is a method including at least the following steps (1) to (7).

(1) A pair of relaxation forming jigs 20 and 20 are arranged apart from each other in the longitudinal direction of the hollow fiber membrane bundle 11 and the hollow fiber membrane bundle 11 is gripped by a pair of loose forming jigs 20 and 20, The holding process.

(2) A relaxation process for imparting relaxation to the hollow fiber membrane bundle 11 by narrowing the separation distance of the pair of relaxation forming jigs 20, 20.

(3) Insertion process of inserting the end portion 11A of the hollow fiber membrane bundle 11 into the insertion port 12a of the housing 12.

(4) A holding process of assembling the housing 12, the hollow fiber membrane bundle 11 and the pair of pillars 17, 17 into the frame of the holding frame 30 having a substantially rectangular shape when viewed in plan.

(5) A coupling process for connecting and fixing the pair of relaxation forming jigs (20, 20) to the holding frame (30).

(6) The fixing resin 2 is injected into the housing 12 and cured to fix the end portion 11A of the hollow fiber membrane bundle 11. The ends 17a of the pair of pillars 17, To the housing (12).

(7) The removing step of removing the holding frame 30 and the pair of loosening-forming jigs 20, 20.

That is, in the manufacturing method of the present embodiment, the holding process and the connecting process using the holding frame 30 are added. Further, in the removing process, the releasing jig 20 and the housing 12 are removed, which is different from the manufacturing method of the first embodiment.

(1) Holding process

In the holding step, a pair of loosening forming jigs 20 and 20 are arranged apart from each other in the longitudinal direction of the hollow fiber bundle 11 in the same manner as in the first embodiment, and a pair of hollow fiber bundles 11 And is gripped by the relaxation forming jigs 20,

In this embodiment, similarly to the first embodiment, the bottom raising jig 40 as shown in Figs. 2 (a) and 2 (b) is placed on the work table before the gripping step.

3 (a) and 3 (b), the first members 21 and 21 constituting the pair of relaxation forming jigs 20 and 20 are separated from each other at the two gap portions 41 Setting.

Subsequently, as shown in Figs. 4 (a) and 4 (b), the bottom razing jig 40 is preliminarily formed on the upper surface 40a of the bottom razing jig 40, The hollow fiber membrane bundle 11 is set at a predetermined position on the first member 21 and the pair of supports 17 and 17 are set.

5 (a) and 5 (b), the hollow fiber membrane bundle 11 is sandwiched between the first member 21 and the first member 21 in the same manner as in the grasping process in the first embodiment The second member 22, 22 is set so as to grasp the hollow fiber membrane bundle 11.

Thereafter, as in the first embodiment, at least either the connecting portion 23A or the connecting portion 22A formed on the right-side relaxation forming jig 20 in the width direction in Figs. 5 (a) and 5 Are fixed to the pair of pillars (17, 17) using a vise or the like.

(2) Relaxation process

Next, also in the relaxation process, relaxation is given to the hollow fiber membrane bundle 11 by narrowing the separation distance of the pair of relaxation forming jigs 20, 20 in the same manner as in the first embodiment.

6 (a) and 6 (b), on the basis of the positioning line 42 on the bottom raising jig 40, any one or both of the pair of relaxation forming jigs 20, Is moved in the direction along the longitudinal direction of the hollow fiber membrane bundle (11) to narrow the separation distance, thereby forming and imparting relaxation to the hollow fiber membrane bundle (11).

Thereafter, as in the first embodiment, at least one of the connecting portion 23A or the connecting portion 22A formed in the relaxation forming jig 20 on the left side in the width direction in Figs. 6A and 6B, Are fixed to the pair of pillars (17, 17) using a vise or the like.

(3) Insertion process

The end portions 11A and 11A of the hollow fiber membrane bundle 11 to which the relaxation is imparted in the relaxation process are inserted into the pair of the housings 12 and 12 in the same manner as in the first embodiment Respectively, from the insertion ports 12a and 12a.

That is, as shown in Figs. 7 (a) and 7 (b), the respective end portions 11A of the hollow fiber membrane bundle 11 are inserted into the predetermined positions from the insertion ports 12a of the respective housings 12. The end portions 17a and 17a of the pair of struts 17 and 17 are inserted from the insertion ports 12a and 12a of the pair of housings 12 and 12 to a predetermined position And they are joined together using an adhesive or a screw, or are joined together by fitting. In the same manner as in the first embodiment, if necessary, a column 17 having a tubular shape may be employed, and the column 17 may be connected and fixed to the mounting portion 15a of the water collecting passage 15 1 (c)).

Also in this embodiment, as in the first embodiment, it is possible to carry out the inserting step before the relaxation step, but from the viewpoint of preventing the displacement of the hollow fiber membrane bundle 11, etc., It is preferable to perform it later.

(4) Holding process

Next, in the holding step, the housing 12, the hollow fiber membrane bundle 11, and the pair of pillars 17, 17 are assembled into a frame of the holding frame body 30 having a substantially rectangular shape when viewed in plan view .

Here, the holding frame 30 used in the present embodiment has the upper angle 31, the lower angle 32, and the pair of holding legs 33 (as shown in Figs. 8A and 8B) And 33, as shown in Fig. 8 (a) and 8 (b), the housing 12, the hollow fiber membrane bundle 11, and the pair of pillars 17, 17, which are held in a substantially horizontal state, And then putting it in an upright posture.

In the holding step, first, the holding frame 30 is horizontally set at a predetermined place, and then the housing 12, the hollow fiber membrane bundle 11 and the pair of pillars 17, 17 In the frame of the holding frame 30. At this time, for example, the pair of housings 12 and 12 can be fixedly press-fitted into the upper and lower angles 31 and 32 of the holding frame body 30, respectively.

As described above, by employing the method using the holding frame 30, the housing 12 and the pillars 17 before being fixed by the fixing resin 2 in the fixing process, which will be described later, even when the posture is changed to an upright state as shown in Fig. 4B and b), it is reliably held by the holding frame 30.

(5) Connection process

Next, in the connecting process, the pair of loosening forming jigs 20 and 20 are connected and fixed to the holding frame 30.

For example, bolt insertion holes may be formed in the support pillars 33 and 33 of the holding frame 30 as shown in Figs. 8 (a) and 8 (b) At least one of the first member 21 or the second member 22 constituting the forming jig 20 is connected and fixed using a bolt. At this time, in the state in which a predetermined relaxation is given to the hollow fiber membrane bundle 11, a connecting portion formed of bolt insertion holes or the like (not shown) formed near both ends of the relaxation forming jig 20 is connected to the holding frame body 30 And fixed at predetermined positions of the support columns 33,

When the bolt insertion hole formed in the holding frame 30 is formed as a long hole, the position of the relaxation forming jig 20 can be moved along the longitudinal direction of the hollow fiber bundle 11, It is preferable that the amount of relaxation of the desert bundle 11 can be further adjusted.

(6) Fixing process

Next, in the fixing step, the fixing resin 2 is injected into the housing 12 into which the end portion 11A of the hollow fiber membrane bundle 11 is inserted, and the hollow fiber membrane bundle 11 is cured by the same method as the first embodiment, The end portions 11A of the pair of pillars 17 and 17 are fixed and the end portions 17a of the pair of pillars 17 and 17 are fixed to the housing 12 as shown in Figures 1 (a) to 1 (c). The ends 17a of the pair of struts 17 inserted in the housing 12 are fixed by the fixing resin 2 in the same manner as the hollow fiber membrane bundle 11 .

 Specifically, as in the first embodiment, a spacer (not shown) made of a water-soluble resin or the like is provided on the bottom portion 13 in the housing 12 first.

Then, the holding frame 30 is rotated to bring the housing 12, the hollow fiber membrane bundle 11, and the pair of pillars 17, 17 into an upright posture.

Next, the uncured hardening resin 2 is filled in the spacer (not shown) from the insertion port 12a to spread the space between the outer surface of the hollow fiber membrane bundle 11 and the inner surface of the housing 12.

The fixing resin 2 is then heated and cured to fix the end portion 11A of the hollow fiber membrane bundle 11 and the end portion 17a of the strut 17 in the housing 12.

Thereafter, as in the first embodiment, an aqueous solvent is poured into the tubular spacer to dissolve the spacer, and then the aqueous solvent is removed to allow the inside of the hollow fiber membrane to communicate with the water collecting channel 15. [

In the fixing step, the holding frame 30 is vertically inverted to place the other housing 12 downward. Then, the fixing resin 2 is also filled in the housing 12 to be hardened, The same process as described above for removing the spacer is performed.

(7) Removal process

Next, in the removing step, the holding frame 30 and the pair of loosening forming jigs 20, 20 are removed from the completed balanced hollow fiber membrane module 1.

The housing 12 and the pair of relief forming jigs 20 and 20 are detached from the holding frame 30 and the pair of relief forming jigs 20 and 20 are separated from each other, The hollow fiber membrane module 11 is removed from the hollow fiber membrane bundle 11 and the pair of struts 17 and 17 to obtain a balanced hollow fiber membrane module 1 as shown in Fig.

(Action effect)

As described above, according to the second embodiment of the method for producing a balanced hollow fiber membrane module according to the present invention, in the relaxation forming step, a pair of pillars 17, 17 are arranged on both sides of the direction of arrangement of the hollow fiber membranes A holding step of inserting at least an end portion 11A of the hollow fiber membrane bundle 11 into the housing 12 and inserting the end portion 11A of the hollow fiber membrane bundle 11 into the holding frame body 30 after the hollow fiber membrane bundle 11 is relaxed, The fixing resin 2 is injected into the housing 12 and cured to fix the end portion 11A of the hollow fiber membrane bundle 11 and to fix the end portion 17a of the pair of pillars 17 and 17 The hollow fiber membrane bundle 11, the housing 12 and the struts 17 in a state in which the hollow fiber membrane bundle 11 is not sufficiently fixed can be used as a finished product, as in the first embodiment, And the state maintained in the same relative positional relationship as It can be provided to the fixing process. As a result, the step of injecting and hardening the fixing resin 2 can be reduced only once by giving a loosening to the hollow fiber membrane bundle 11 by a simple method. Therefore, it becomes possible to manufacture the balanced hollow fiber membrane module 1 with excellent handling efficiency with excellent production efficiency.

The method of producing a balanced hollow fiber membrane module of the present invention can reduce the number of processes for injecting and hardening the fixing resin into one time only while giving looseness to the bundle of hollow fiber membranes by a simple method, It is very useful in the case of producing a balanced hollow fiber membrane module for use in wastewater treatment or the like in that the module can be manufactured with excellent production efficiency.

The hollow fiber membrane module according to any one of claims 1 to 3, wherein the hollow fiber membrane module comprises a hollow fiber membrane module (1) A pair of struts) 20: a loosening forming jig (a pair of loosening forming jigs: a wave for manufacturing an equilibrium hollow fiber membrane module) 21: a first member 22: a second member 26: Retaining frame body.

Claims (11)

Each of the end portions of the sheet-like hollow fiber membrane bundle comprising a plurality of hollow fiber membranes is inserted and fixed in the housing from each of the insertion ports of the housing, A method for manufacturing a balanced hollow fiber membrane module, wherein each end of a pair of struts disposed on both sides of the direction of arrangement of the hollow fiber membranes along the longitudinal direction of the hollow fiber membrane bundle is fixed to the housing,
A holding step of disposing a pair of loosening forming jigs at a distance in the longitudinal direction of the hollow fiber membrane bundle and holding the bundle of hollow fiber membranes with the pair of loosening forming jigs,
A relaxation step of applying relaxation to the bundle of hollow fiber membranes by narrowing the separation distance of the pair of relaxation forming jigs,
An insertion step of inserting an end of the hollow fiber membrane bundle into an insertion port of the housing,
A fixing step of injecting fixing resin into the housing and curing the fixing resin to fix the ends of the hollow fiber membrane bundle and fixing the ends of the pair of pillars to the housing;
And removing the pair of relaxation forming jigs. Each of the end portions of the sheet-like hollow fiber membrane bundle comprising a plurality of hollow fiber membranes is inserted and fixed in the housing from each of the insertion ports of the housing, A method for manufacturing a balanced hollow fiber membrane module, wherein each end of a pair of struts arranged on both sides of the direction of arrangement of the hollow fiber membranes along the longitudinal direction of the hollow fiber membrane bundle is fixed to the housing,
A holding step of disposing a pair of loosening forming jigs at a distance in the longitudinal direction of the hollow fiber membrane bundle and holding the bundle of hollow fiber membranes with the pair of loosening forming jigs,
A relaxation step of applying relaxation to the bundle of hollow fiber membranes by narrowing the separation distance of the pair of relaxation forming jigs,
An insertion step of inserting an end of the hollow fiber membrane bundle into an insertion port of the housing,
A holding step of assembling the housing, the hollow fiber membrane bundle, and the pair of struts into a frame of a holding frame body having a substantially rectangular shape when viewed in plan,
A connecting step of connecting and fixing the pair of loosening forming jigs to the holding frame body,
A fixing step of injecting fixing resin into the housing and curing the fixing resin to fix the ends of the hollow fiber membrane bundle and fixing the ends of the pair of pillars to the housing;
And removing the retaining frame body and the pair of relaxation forming jigs. 3. The method according to claim 1 or 2,
Wherein the relaxation forming jig has an elastic member having a hardness of 3 to 20 degrees formed in a gripping portion for gripping the bundle of hollow fiber membranes. 4. The method according to any one of claims 1 to 3,
Wherein the elastic member has a thickness of 2 mm or more. 5. The method according to any one of claims 1 to 4,
Wherein the ratio (L / W) of the total width (W) of the hollow fiber membrane module to the total length (L) of the hollow fiber membrane module in the array direction of the hollow fiber membrane module is 10 to 60 times, Method of manufacturing a desert module. 5. The method according to any one of claims 1 to 4,
Wherein the ratio (L / W) of the total width (W) of the hollow fiber membrane module to the total length (L) of the hollow fiber membrane module in the array direction of the hollow fiber membrane module is 20 to 50 times, Method of manufacturing a desert module. 7. The method according to any one of claims 1 to 6,
Wherein the total length (L) of the balanced hollow fiber membrane module in the array direction of the hollow fiber membranes is in the range of 300 to 1500 mm. 7. The method according to any one of claims 1 to 6,
Wherein the total length (L) of the balanced hollow fiber membrane module in the arrangement direction of the hollow fiber membranes is in the range of 500 to 1250 mm. 9. The method according to any one of claims 1 to 8,
Wherein the hollow fiber membrane bundle weight per unit area of the balanced hollow fiber membrane module is 50 g / cm 2 or less due to the grip of the relaxation-forming jig. A hollow fiber membrane module according to any one of claims 1 to 9, which is used in a manufacturing method of a hollow fiber membrane module, and while the bundle of hollow fiber membranes is fixed to a housing by a fixing resin, Which is used for producing a hollow fiber membrane module,
A first member and a second member for holding the bundle of hollow fiber membranes sandwiching the bundle of hollow fibers,
And a holding means capable of bringing the first member and the second member close to each other so that the distance between the first member and the second member becomes smaller than the thickness of the hollow fiber membrane bundle, . Wherein the housing having the water collecting flow path is provided on both sides in the longitudinal direction of the hollow fiber membrane and both end portions of the sheet-like hollow fiber membrane bundle made up of the plurality of hollow fiber membranes are inserted from the insertion ports of the respective housings, And both ends of a pair of struts arranged along the bundle of hollow fiber membranes on both sides of the direction of arrangement of the hollow fiber membranes in the hollow fiber membrane bundle are fixed to the respective housings The hollow fiber membrane module comprising:
Both ends of the pair of struts are respectively inserted from the insertion ports of the respective housings and fixed in the housing through the fixing resin,
Wherein the hollow fiber membrane bundle is fixed in a relaxed state between each of the housings disposed on both sides in the longitudinal direction of the hollow fiber membrane,
Wherein the housing is cut at a position of 30 mm from the insertion port toward the water collecting flow path side in the housing so that one kind of the fixing resin is sealed between the hollow fiber membrane bundle and the housing in a liquid- A hollow hollow fiber membrane module.

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