JP2018023964A - Manufacturing method and manufacturing device of hollow fiber membrane module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method and a manufacturing device of a hollow fiber membrane module which facilitate injection of potting resin without widening an opening part of a water collection pipe, suppress damage of a hollow fiber membrane sheet-like material by contacting with a nozzle, and facilitate automation of injection work by a machine.SOLUTION: A manufacturing method of a hollow fiber membrane module having a hollow fiber membrane sheet-like material 10 and a water collection pipe 12b includes a potting process in which an end part of the hollow fiber membrane sheet-like material 10 is fixed by a water collection pipe 12b, liquid-like potting resin P is injected from a nozzle 50 in the water collection pipe 12b in a state where a sheet surface 10a of the hollow fiber membrane sheet-like material 10 is inclined with respect to a vertical direction by holding means 110, and is cured, and hollow fiber membranes are mutually fixed in a storage part in the water collection pipe 12b of the hollow fiber membrane sheet-like material 10.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a method and apparatus for manufacturing a hollow fiber membrane module.

  As a hollow fiber membrane module used for the production of aseptic water, drinking water, highly pure water, etc., a water collecting pipe is provided at the end of a hollow fiber membrane sheet material in which a plurality of hollow fiber membranes are arranged in a sheet shape. Hollow fiber membrane modules are known (Patent Documents 1 and 2).

  As a manufacturing method of such a hollow fiber membrane module, the following method is mentioned, for example. In the state where the end of the hollow fiber membrane sheet is inserted in a water collecting pipe having an opening formed at one end and standing in the vertical direction, water is collected from both sheet surface sides of the hollow fiber membrane sheet. A liquid potting resin (potting solution) is poured into the tube and hardened, and the end is liquid-tightly fixed in the water collecting tube.

  However, in the manufacturing method described above, since the gap between the hollow fiber membrane sheet and the water collecting pipe is narrow, it is difficult to inject the potting resin. In Patent Document 2, the tip portions of the pair of side walls forming the opening of the water collecting pipe are respectively spread outward, and the gap between the hollow fiber membrane sheet and the water collecting pipe is widened to facilitate the potting resin injection work. A method is disclosed. However, in this method, the thickness of the water collecting pipe is increased by the amount of opening. For this reason, when a plurality of hollow fiber membrane modules are installed side by side in the thickness direction of the water collection pipe, their installation occupation area becomes large, and space saving becomes difficult. Further, for example, when performing an air scrubbing treatment for preventing sludge and the like from adhering to the membrane surface, aerated air is less likely to pass between the hollow fiber membrane modules, and the effect is not sufficiently obtained.

  Moreover, in the said manufacturing method, potting resin is discharged diagonally downward from a nozzle, and is inject | poured into the clearance gap between a hollow fiber membrane sheet-like material and a water collection pipe | tube. Therefore, in order to prevent the potting resin from leaking to the outside of the water collection pipe at the time of injection, it is necessary to make the tip of the nozzle that discharges the potting resin as narrow as possible and to be as close as possible to the hollow fiber membrane sheet. Therefore, the potting resin is easily clogged in the nozzle, the discharge amount is limited, and the hollow fiber membrane sheet-like material may be damaged when the tip of the nozzle contacts. In addition, when trying to automate such potting resin injection work with a machine, the position of the nozzle must be controlled in multiple axes with high accuracy, so the combination of the multi-axis robot and the sensor is a hollow fiber membrane sheet-like material. Both sides will be required and the initial cost will rise.

JP 2000-288357 A International Publication No. 2015/152401

  The present invention provides a hollow fiber membrane module that can easily and stably inject potting resin, can prevent damage to the hollow fiber membrane sheet due to contact with the nozzle, and can easily automate the injection operation by a machine. An object is to provide a method and a manufacturing apparatus.

The present invention has the following configuration.
[1] A hollow fiber membrane sheet in which a plurality of hollow fiber membranes are arranged in a sheet shape, and a water collecting pipe provided at an end of the hollow fiber membrane sheet in the length direction of the hollow fiber membrane; A hollow fiber membrane module in which the hollow fiber membranes are fixed to each other with a cured product of potting resin in a housing portion of the hollow fiber membrane sheet material accommodated in the water collecting pipe. The end portion is fixed with a potting jig, and the sheet surface of the hollow fiber membrane sheet is inclined with respect to the vertical direction, and the liquid potting resin is slit from the nozzle into the slit shape of the potting jig. A method of manufacturing a hollow fiber membrane module, comprising a potting step in which the hollow fiber membrane is fixed by being injected into the potting jig through the opening and cured.
[2] The method for producing a hollow fiber membrane module according to [1], wherein a water collecting pipe is used as the potting jig.
[3] The method for manufacturing a hollow fiber membrane module according to [1], wherein after the potting step, the potting jig is removed from the end portion, and the water collecting pipe is attached to the end portion.
[4] The method for producing a hollow fiber membrane module according to any one of [1] to [3], wherein an angle formed by the sheet surface and the vertical direction is 10 to 60 °.
[5] The hollow fiber according to any one of [1] to [4], wherein the potting resin is injected into the potting jig while moving the nozzle in the width direction of the hollow fiber membrane sheet. Membrane module manufacturing method.
[6] The potting resin is injected into the potting jig while moving the hollow fiber membrane sheet in the width direction with respect to the nozzle, according to any one of [1] to [4]. Manufacturing method of hollow fiber membrane module.
[7] The method for producing a hollow fiber membrane module according to any one of [1] to [6], wherein the nozzle is positioned above the hollow fiber membrane sheet.
[8] Any one of [1] to [7], wherein the potting resin is transferred to the sheet surface and injected into the potting jig through a slit-shaped opening of the potting jig and cured. The manufacturing method of the hollow fiber membrane module of description.
[9] The manufacturing of the hollow fiber membrane module according to any one of [1] to [8], wherein the potting resin is supplied only to one of the pair of sheet surfaces of the hollow fiber membrane sheet. Method.
[10] Both ends of the hollow fiber membrane in the length direction of the hollow fiber membrane sheet are fixed by the potting jig, and the hollow fiber membrane sheet is fixed to the length of the hollow fiber membrane. The liquid potting resin is fixed to both ends by using two nozzles in a state where the sheet surface is curved so as to protrude upward in the direction and the sheet surfaces are inclined on both ends. The method for producing a hollow fiber membrane module according to [9], wherein the hollow fiber membrane module is injected from each of the slit-shaped openings of the potting jig into the potting jig and cured.
[11] A hollow fiber membrane sheet in which a plurality of hollow fiber membranes are arranged in a sheet shape, and a water collecting pipe provided at an end portion of the hollow fiber membrane in the length direction of the hollow fiber membrane, And a hollow fiber membrane module in which the hollow fiber membranes are fixed to each other by a hardened product of potting resin in the accommodation portion of the hollow fiber membrane sheet material accommodated in the water collecting pipe. A holding means for holding the hollow fiber membrane sheet with the end fixed by a potting jig in a state where the sheet surface is inclined with respect to the vertical direction, and a nozzle for discharging liquid potting resin; An apparatus for producing a hollow fiber membrane module, comprising a potting device comprising:

According to the method for manufacturing a hollow fiber membrane module of the present invention, potting resin can be easily and stably injected, the nozzle can be prevented from coming into contact and the hollow fiber membrane sheet can be prevented from being damaged, and the injection operation by a machine is automated. Is also easy.
If the manufacturing apparatus of the hollow fiber membrane module of this invention is used, potting resin can be poured easily and stably, and it can also suppress that a nozzle contacts and damages a hollow fiber membrane sheet-like thing.

It is the perspective view which showed an example of the hollow fiber membrane module manufactured with the manufacturing method of this invention. It is AA sectional drawing of the hollow fiber membrane module of FIG. It is the top view which showed the hollow fiber membrane sheet-like material in the hollow fiber membrane module of FIG. It is sectional drawing which showed 1 process of the manufacturing method of the hollow fiber membrane module of this invention. It is sectional drawing which showed 1 process of the manufacturing method of the hollow fiber membrane module of this invention.

  The method for producing a hollow fiber membrane module of the present invention includes a hollow fiber membrane sheet in which a plurality of hollow fiber membranes are arranged in a sheet shape, and a length direction of the hollow fiber membrane in the hollow fiber membrane sheet A hollow tube in which the hollow fiber membranes are fixed to each other by a potted resin cured product in a housing portion of the hollow fiber membrane sheet-like material housed in the water collecting tube. This is a method of manufacturing a yarn membrane module.

[Hollow fiber membrane module]
Hereinafter, an example of the hollow fiber membrane module manufactured with the manufacturing method of this invention is shown and demonstrated.
As shown in FIGS. 1 to 3, the hollow fiber membrane module 1 of the present embodiment includes four stacked hollow fiber membrane sheet-like materials 10 and a lengthwise direction of the four hollow fiber membrane sheet-like materials 10. And a pair of long water collecting pipes 12a and 12b attached to both ends. Potting for fixing in a state in which the accommodating portions 13a and 13b on the end portions 11a and 11b side of the four stacked hollow fiber membrane sheets 10 are inserted and accommodated in the water collecting pipes 12a and 12b, respectively. It is liquid-tightly fixed to the water collecting pipes 12a and 12b by a potting portion 14 made of a cured resin.

The hollow fiber membrane sheet 10 is aligned in a sheet shape so that a plurality of hollow fiber membranes 16 are parallel to each other, and both open end faces 16a in the length direction of each hollow fiber membrane 16 are open. It is summarized in the state.
The number of hollow fiber membrane sheets in the hollow fiber membrane module is not limited to four, and may be one or any number of two or more.

  Examples of the material of the hollow fiber membrane include polysulfone resins, polyacrylonitrile, cellulose derivatives, polyolefins such as polyethylene and polypropylene, fluorine resins such as polyvinylidene fluoride (PVDF) and polytetrafluoroethylene, polyamide, polyester, and polymethacrylate. And polyacrylate. Moreover, you may use what introduce | transduced the substituent into some of these resin. The material of the hollow fiber membrane may be one type or two or more types.

  In the hollow fiber membrane sheet 10, a constant length extending in a direction orthogonal to the length direction of the hollow fiber membrane 16 on both ends 11 a and 11 b side in the length direction of the hollow fiber membrane 16. A band-shaped first bundling portion 18a and a second bundling portion 18b having a width are provided. A plurality of hollow fiber membranes 16 are collected by the first binding portion 18a and the second binding portion 18b.

  In the portion of the hollow fiber membrane sheet 10 where the first binding portion 18a and the second binding portion 18b are provided, the distance between the adjacent hollow fiber membranes 16 is preferably 0 to 1 mm. If the distance between the adjacent hollow fiber membranes 16 is within the above range, the amount of the bundling portion used with respect to the number of hollow fiber membranes can be suppressed and the cost can be reduced while securing an effective membrane area.

  The 1st binding part 18a is each provided in both the edge parts 11a and 11b of the length direction of the hollow fiber membrane sheet-like object 10. FIG. The 1st binding part 18a is the state inserted in the water collection pipes 12a and 12b. In this example, the opening end face 16a of the hollow fiber membrane 16 and the side end face on the opening end face 16a side of the first binding portion 18a are flush with each other. By providing the first binding portion 18a in this way, it is easy to suppress a decrease in the effective membrane area.

The second binding portion 18b is provided in the length direction in the vicinity of the end portions 11a and 11b of the hollow fiber membrane sheet 10 so as to be separated from the first binding portion 18a by the distance L2 in the center. The 2nd binding part 18b is located in the part exposed from the water collection pipes 12a and 12b in the hollow fiber membrane sheet-like thing 10. FIG.
The distance L2 can be set as appropriate, and is preferably 8 to 50 mm.

  The width L1 of the first binding portion 18a and the width L3 of the second binding portion 18b are each preferably 3 to 30 mm. If the width L1 and the width L3 are equal to or greater than the lower limit value, sufficient binding strength can be easily obtained. If the width L1 and the width L3 are equal to or less than the upper limit values, it is easy to suppress a decrease in film area. The width L1 and the width L3 may be the same or different.

  As for the thickness of the 1st binding part 18a and the 2nd binding part 18b, 0.1-1 mm is respectively preferable. If thickness is more than a lower limit, it will become a binding part of sufficient intensity | strength, and a hollow fiber membrane sheet-like thing will be hard to fracture | rupture. If the thickness is less than or equal to the upper limit value, the cost can be reduced, and it becomes easy to increase the packing density of the hollow fiber membranes per hollow fiber membrane module.

As a material for forming the first binding portion 18a and the second binding portion 18b, for example, an elastic body having an elongation (E) defined by JIS K6251 of 200% or more can be cited, and the elongation (E) can be 300% or more. An elastic body is preferable. The upper limit of the elongation (E) of the elastic body is not particularly limited, but is usually about 600%.
If the 1st binding part 18a is formed with the said elastic body, the sealing performance between the overlapping 1st binding parts 18a or between the 1st binding part 18a and the side wall parts 20a and 20b of the water collecting pipes 12a and 12b will be explained. Is easily exhibited. Therefore, when the liquid potting resin is poured into the water collecting pipes 12a and 12b, it is easy to suppress the potting resin from leaking to the bottom 20c side from the first binding portion 18a. If the second binding portion 18b is formed of the elastic body, when the liquid potting resin is injected into the water collection pipes 12a and 12b, it is easy to suppress excessive creeping of the potting resin due to capillary action.

As for the durometer hardness prescribed | regulated by JISK6253 of an elastic body, A40-80 are preferable. If the durometer hardness of the elastic body used for the first binding portion 18a is within the above range, it is easy to suppress leakage of the potting resin to the bottom 20c side during injection. If the durometer hardness of the elastic body used for the second binding portion 18b is within the above range, it is easy to suppress damage to the hollow fiber membrane during the air scrubbing process.
The standard of durometer hardness according to JIS K6253 corresponds to ISO 7619.

  As the material of the elastic body, a thermoplastic elastomer is preferable. The type of thermoplastic elastomer can be selected in consideration of environmental resistance and the like according to the environment in which the hollow fiber membrane module is used. Examples of the thermoplastic elastomer include styrene elastomer (TPS), olefin elastomer (TPO), vinyl chloride elastomer (TPVC), ester elastomer (TPC), urethane elastomer (TPU), and amide elastomer (TPA). Etc. Of these, styrene-based elastomers (TPS) are preferred because of their high rubber elasticity and excellent chemical resistance. The material of the elastic body may be one type or two or more types.

The water collecting pipes 12a and 12b have a semicircular bottom section 20c that connects a pair of long side walls 20a and 20b whose faces face each other and ends in a short direction of the pair of side walls 20a and 20b. And is formed. A slit-like opening 22 extending along the longitudinal direction is formed at the other end of the water collecting pipes 12a and 12b in the short direction. Thus, the water collection pipes 12a and 12b are long members. The shape of the cross section orthogonal to the longitudinal direction of the water collection pipes 12a and 12b is U-shaped.
In the hollow fiber membrane module 1, the four hollow fiber membrane sheet-like materials 10 are stacked so that the first binding portions 18a are in close contact with each other and the second binding portions 18b are in close contact with each other. In the state of being overlapped in this way, the end portions 11a and 11b provided with the first binding portion 18a of each hollow fiber membrane sheet 10 are inserted into the water collecting pipes 12a and 12b.

1-30 mm is preferable and, as for the distance L of the 2nd binding part 18b and the opening part 22 of the water collection pipes 12a and 12b, 3-10 mm is more preferable. If the distance L is equal to or greater than the lower limit value, it becomes easy to inject liquid potting resin (potting liquid) into the water collecting pipes 12a and 12b, so that the potting resin is sufficiently spread in the water collecting pipe and cured. This makes it easier to reduce the leak rate. If the distance L is less than or equal to the upper limit value, it is easy to suppress a decrease in the effective membrane area of the hollow fiber membrane module.
In the case of the second bundling portion 18b on the side of the water collecting pipe 12b, the distance L is from the opening 22 of the water collecting pipe 12b in the length direction of the hollow fiber membrane 16 (from the front end surfaces of the side wall portions 20a and 20b). This is the length to the side end of the second bundling portion 18b on the water collecting pipe 12b side. The same applies to the distance L of the second bundling portion 18b on the water collecting pipe 12a side.

  On the inner surfaces of the side wall portions 20a and 20b of the water collecting pipes 12a and 12b in this example, step portions 24 extending along the longitudinal direction of the water collecting pipes 12a and 12b are formed at positions facing each other. The distance (clearance) between the side wall 20a and the side wall 20b on the bottom 20c side is smaller than the distance (clearance) between the side wall 20a and the side wall 20b on the opening 22 side. In this example, the position of the step portion 24 and the side end on the center side in the longitudinal direction of the hollow fiber membrane 16 in the first binding portion 18a coincide with each other.

  The distance between the side wall 20a on the bottom 20c side of the stepped portion 24 and the side wall 20b is set to be approximately the same as or slightly smaller than the total thickness of the first bundling portion 18a of the stacked hollow fiber membrane sheet 10. Has been. Thereby, the part of the 1st binding part 18a of the laminated | stacked hollow fiber membrane sheet-like material 10 closely_contact | adheres with the inner surface of side wall part 20a, 20b, and a sealing property is exhibited. Further, the stacked first bundling portions 18a are also in close contact with each other in a liquid-tight manner, and a sealing property is exhibited.

  The material of the water collecting pipe is preferably one having excellent mechanical strength and durability, such as polycarbonate, polysulfone, polyolefin, PVC (polyvinyl chloride), acrylic resin, ABS resin, modified PPE (polyphenylene ether), etc. Can be mentioned. The material of the water collecting pipe may be one type or two or more types.

The potting part 14 is formed so that the part from the 1st binding part 18a to the opening part 22 in the outer side of each hollow fiber membrane 16 in the water collection pipes 12a and 12b may be filled. Thereby, the water collection space 26 is formed in the bottom 20c side rather than the potting part 14 and the 1st binding part 18a in the water collection pipes 12a and 12b.
In the hollow fiber membrane module 1, the treated liquid filtered by the plurality of hollow fiber membranes 16 forming the hollow fiber membrane sheet 10 is once collected in the water collection space 26 of the water collection pipes 12a and 12b. The water collecting pipes 12a and 12b are taken out to the outside of the hollow fiber membrane module 1 through a water intake port 28 formed at the end in the longitudinal direction.

  Examples of the potting resin that forms the potting portion 14 include epoxy resins, unsaturated polyester resins, polyurethane resins, silicone fillers, and various hot melt resins. The potting resin that forms the potting portion 14 may be one type or two or more types.

[Method for producing hollow fiber membrane module]
In the method for producing a hollow fiber membrane module of the present invention, the end of the hollow fiber membrane in the length direction of the hollow fiber membrane sheet is fixed with a potting jig, and the sheet surface of the hollow fiber membrane sheet is vertically In a state of being inclined with respect to the direction, liquid potting resin is injected from the nozzle into the potting jig through the slit-shaped opening of the potting jig and cured to accommodate the hollow fiber membrane sheet-like material It has a potting process for fixing the hollow fiber membranes to each other at a portion. Here, the sheet surface refers to a surface of the hollow fiber membrane sheet that is formed in a substantially planar shape by a plurality of aligned hollow fiber membranes.

  In the production method of the present invention, a hollow fiber membrane module production apparatus including a potting device having a holding means and a nozzle can be used. The holding means is means for holding the hollow fiber membrane sheet fixed with the potting jig in a state where the sheet surface is inclined with respect to the vertical direction. The nozzle discharges liquid potting resin.

Hereinafter, as an example of the method for producing the hollow fiber membrane module of the present invention, a method for producing the hollow fiber membrane module 1 using a water collecting pipe as the potting jig will be described.
As shown in FIG. 4, the hollow fiber membrane module manufacturing apparatus 100 (hereinafter simply referred to as “manufacturing apparatus 100”) includes a potting apparatus 102 including a holding unit 110 and a nozzle 50. The holding means 110 includes a long plate-like substrate portion 112 and a protruding ridge portion 114 that protrudes from the upper surface of the substrate portion 112 and extends in the length direction. The protrusion 114 has a triangular cross-section cut in a direction perpendicular to the length direction, and has an inclined surface 114a on one side. The water collecting pipes 12a and 12b into which the end portions 11a and 11b of the hollow fiber membrane sheet 10 are inserted can be leaned on the inclined surface 114a of the ridge 114. In this way, the hollow fiber membrane sheet 10 is held in a state where the sheet surface 10a is inclined with respect to the vertical direction by leaning the water collecting pipes 12a, 12b against the inclined surface 114a of the ridge 114.

  The nozzle 50 is disposed above the hollow fiber membrane sheet 10 held by the holding means 110, and discharges the liquid potting resin P substantially vertically downward toward the sheet surface 10a.

  In the potting device 102, it is preferable that the nozzle 50 moves in the width direction of the hollow fiber membrane sheet 10 with respect to the hollow fiber membrane sheet 10 held by the holding means 110. By discharging the potting resin P while the nozzle 50 moves in this way, it becomes easy to inject the potting resin P entirely in the width direction of the hollow fiber membrane sheet 10. In some cases, the holding means 110 may move while holding the hollow fiber membrane sheet 10 so that the nozzle 50 relatively moves in the width direction of the hollow fiber membrane sheet 10. .

  In the manufacturing method of this embodiment, the four hollow fiber membrane sheet-like materials 10 are laminated so that the first bundling portions 18a and the second bundling portions 18b overlap each other. Next, in the potting process, one end portion 11b in the length direction in which the first binding portion 18a is provided in the laminate of the hollow fiber membrane sheet-like material 10 is inserted into the water collecting pipe 12b. Next, as shown in FIG. 4, the hollow fiber membrane sheet 10 is held by the holding means 110 of the potting apparatus 102 in the manufacturing apparatus 100 in a state where the sheet surface 10a in the thickness direction is inclined with respect to the vertical direction. In this state, a liquid potting resin (potting liquid) P is discharged downward from a nozzle 50 located above the hollow fiber membrane sheet 10, and the potting resin P is transferred to the upper sheet surface 10 a so as to be within the water collecting pipe. It is injected into 20b and cured. Thereby, each hollow fiber membrane 16 is mutually fixed in the accommodating part 13b by the side of the edge part 11b of each hollow fiber membrane sheet-like thing 10, Furthermore, the accommodating part 13b of the hollow fiber membrane sheet-like substance 10 is attached to the water collection pipe | tube 12b. Fixed liquid-tight. In the laminated body of the hollow fiber membrane sheet 10, the other end portion 11 a in the length direction where the first binding portion 18 a is provided is similarly inserted into the water collecting pipe 12 a using the potting device 102. Potting resin P is injected and cured. Thereby, also in the accommodating part 13a by the side of the edge part 11a of each hollow fiber membrane sheet | seat 10, each hollow fiber membrane 16 is mutually fixed, and also the accommodating part 13a is liquid-tightly fixed to the water collection pipe | tube 12a.

In this way, the liquid potting resin P is supplied from above with the sheet surface 10a of the hollow fiber membrane sheet 10 inclined, and the potting resin P is collected using the hollow fiber membrane sheet 10 as a guide. It inject | pours in the water pipes 12a and 12b.
The discharge direction of the potting resin P from the nozzle 50 is preferably vertically downward. The discharging direction of the potting resin P may be inclined with respect to the vertical direction as long as the effects of the present invention are not impaired. Even when the discharge direction of the potting resin P is inclined with respect to the vertical direction, the inclination of the discharge direction with respect to the vertical direction is preferably 45 ° or less.

  For example, the potting resin P is injected into the water collecting pipes 12a and 12b while the nozzle 50 is moved in the width direction of the hollow fiber membrane sheet 10 without moving the hollow fiber membrane sheet 10. The aspect to inject is mentioned. In addition, the potting resin P is collected in the water collecting pipes 12a and 12b while moving the hollow fiber membrane sheet 10 so that the nozzle 50 moves relatively in the width direction of the hollow fiber membrane sheet 10 without moving the nozzle 50. It is good also as an aspect injected into. Further, the potting resin P is moved to the water collecting pipes 12a and 12b while moving both the nozzle 50 and the hollow fiber membrane sheet 10 so that the nozzle 50 moves in the width direction of the hollow fiber membrane sheet 10 relatively. It is good also as a mode to inject.

  As a mode of injecting the potting resin P, the nozzle 50 is moved in the width direction of the hollow fiber membrane sheet 10 without moving the hollow fiber membrane sheet 10 because the automation by the machine is easy and the cost can be further reduced. A mode in which the potting resin P is poured into the water collecting pipes 12a and 12b while being moved is preferable.

  The moving speed of the nozzle may be appropriately selected depending on the viscous behavior of the potting liquid, the injection amount, and the distance between the nozzle and the hollow fiber membrane sheet, and is preferably 100 mm / s or more, more preferably 500 to 1000 mm / s. If the moving speed of the nozzle is equal to or higher than the lower limit value, the productivity is increased. If the moving speed of the nozzle is equal to or less than the upper limit value, it is easy to stably supply the potting resin in the gas phase portion traveling section in contact with the hollow fiber membrane sheet from the nozzle. Moreover, it is easy to prevent troubles such as liquid leakage due to bending fatigue in the flow pipe from the injection supply pump to the nozzle.

  In the potting resin injection method described above, even when the nozzle 50 is separated from the hollow fiber membrane sheet 10, the potting resin P discharged downward from the nozzle 50 reaches the sheet surface 10 a of the hollow fiber membrane sheet 10, It is injected into the water collecting pipe 12a. Therefore, it is not necessary to bring the nozzle 50 closer to the hollow fiber membrane sheet 10 than necessary. Therefore, the position of the nozzle 50 can be sufficiently separated from the hollow fiber membrane sheet-like material 10 as compared with the case where the potting resin is injected with the hollow fiber membrane sheet-like material 10 standing in the vertical direction. Thereby, it can suppress that the hollow fiber membrane sheet-like object 10 is damaged by the nozzle 50 contacting. Even when the potting resin P injection is automated by a machine, a sensor for grasping the position of the nozzle 50 and a multi-axis robot for controlling the position of the nozzle 50 in multiple axes are not required, so automation is easy and cost is reduced. it can.

  The distance between the tip of the nozzle 50 and the sheet surface 10a of the hollow fiber membrane sheet 10 in the vertical direction is preferably 5 mm or more, and more preferably 10 to 30 mm. If the said distance is more than a lower limit, it will become easy to suppress that the hollow fiber membrane sheet-like object 10 is damaged by the nozzle 50 contacting. If the distance is not more than the upper limit value, the potting resin P can be injected more stably.

  Further, in the above-described potting resin injection method, it is not necessary to make the tip of the nozzle 50 thinner in order to approach the gap between the water collecting pipe 12a and the hollow fiber membrane sheet-like material 10. Therefore, clogging of the potting resin P in the nozzle 50 is suppressed, the discharge amount of the potting resin P is not limited, and the discharge amount can be sufficiently increased.

  The outer diameter of the tip of the nozzle 50 is preferably 2 mm or more, and more preferably 3 to 6 mm. If the outer diameter of the tip of the nozzle 50 is equal to or greater than the lower limit value, it is easy to suppress clogging of the potting resin P in the nozzle 50, and it is also easy to sufficiently increase the discharge amount of the potting resin P.

  Further, in the potting resin injection method described above, since the position of the nozzle 50 can be separated from the hollow fiber membrane sheet-like material 10, the potting resin P can be easily injected without expanding the opening 22 of the water collecting pipe 12a.

  When using the hollow fiber membrane sheet-like material 10 in which the first bundling portion 18a and the second bundling portion 18b are provided at the end portions 11a and 11b in the length direction as in this example, the first portion on the sheet surface 10a from the nozzle 50 is used. It is preferable that the potting resin P is discharged between the first binding portion 18a and the second binding portion 18b. Thereby, the potting resin P supplied to the sheet surface 10a is easily poured into the water collection pipes 12a and 12b. Moreover, since the creeping of the potting resin P due to the capillary phenomenon is suppressed up to the second bundling portion 18b at the maximum, it is easy to suppress the reduction of the effective membrane area.

The potting resin P is preferably injected by supplying the potting resin P only to one of the pair of sheet surfaces 10 a and 10 b in the thickness direction of the hollow fiber membrane sheet 10.
When the injection is performed with the hollow fiber membrane sheet 10 standing in the vertical direction, in order to firmly fix the hollow fiber membrane sheet 10 by filling the water collecting pipe 12a with a sufficient amount of potting resin P, It is necessary to inject the potting resin P from both the one sheet surface 10a side and the other sheet surface 10b side of the hollow fiber membrane sheet 10. However, when injecting while inclining the hollow fiber membrane sheet 10, the potting resin P injected from the sheet surface 10 a side easily moves to the sheet surface 10 b side by gravity. As described above, the hollow fiber membrane sheet can be firmly fixed by filling the water collecting pipe with a sufficient amount of the potting resin only by pouring the potting resin from one sheet surface side. When the potting resin injection is automated by a machine, the machine can be simplified in this respect as well, and the cost can be further reduced.

  The lower limit of the angle θ formed by the inclined sheet surface 10a of the hollow fiber membrane sheet 10 and the vertical direction is preferably 10 ° or more, more preferably 15 ° or more, and the upper limit is preferably 60 ° or less. More preferably, it is not more than °. If the angle θ is equal to or greater than the lower limit value, it is easy to separate the nozzle 50 from the hollow fiber membrane sheet 10. If the angle θ is equal to or smaller than the upper limit value, the potting resin P is easily injected into the water collecting pipes 12a and 12b without spreading on the sheet surface at the time of injection.

  The fixing of both end portions 11a and 11b in the length direction of the hollow fiber membrane sheet 10 by injection of the potting resin P to the water collecting pipes 12a and 12b may be sequentially performed on the respective end portions 11a and 11b. You may perform simultaneously about both edge part 11a, 11b. In the present invention, it is preferable to fix both ends of the hollow fiber membrane sheet in the length direction to the water collecting pipe at the same time.

As an aspect in which the potting resin is injected simultaneously at both end portions 11a and 11b in the length direction of the hollow fiber membrane sheet-like material 10, for example, a hollow fiber membrane module manufacturing apparatus 100A illustrated in FIG. And an embodiment using “manufacturing apparatus 100A”). The manufacturing apparatus 100A includes a potting apparatus 102A including a holding unit 110A and nozzles 50A and 50B.
The holding means 110A includes a long plate-like substrate portion 112A, protruding protrusions 114A and 114B protruding from the upper surface of the substrate portion 112A, and extending between the protruding protrusions 114A and 114B. And a sheet support portion 116 extending in the length direction.

  114 A of protruding item | lines have a triangular cross-sectional shape cut | disconnected in the direction perpendicular | vertical to a length direction, and have the inclined surface 114a in one surface. Similarly, the protrusion 114B has a triangular cross section cut in a direction perpendicular to the length direction, and has an inclined surface 114b on one surface. The projecting ridge 114A and the projecting ridge 114B are provided in parallel so that the inclined surfaces 114a and 114b face each other. A water collecting pipe 12a into which the end portion 11a of the hollow fiber membrane sheet 10 is inserted can be leaned on the inclined surface 114a of the protruding portion 114A. Similarly, the water collecting pipe 12b into which the end part 11b of the hollow fiber membrane sheet-like material 10 is inserted can be leaned on the inclined surface 114b of the protruding line part 114B. Thus, the both ends 11a in the sheet surface 10a of the hollow fiber membrane sheet-like article 10a by leaning the water collecting pipes 12a and 12b on the inclined surface 114a of the protruding strip 114A and the inclined surface 114b of the protruding strip 114B, respectively. The part on the 11b side is held in a state where it is inclined with respect to the vertical direction.

  The sheet support portion 116 has a rectangular cross-sectional shape cut in a direction perpendicular to the length direction, and the height is higher than the ridge portions 114A and 114B. In the state in which the hollow fiber membrane sheet 10 is held, the tip portion of the sheet support portion 116 abuts on the central portion of the curved hollow fiber membrane sheet 10 in the length direction, so that the hollow fiber membrane sheet is obtained. 10 is held more stably.

  The nozzle 50A is disposed above the portion on the one end portion 11a side of the hollow fiber membrane sheet 10 held by the holding means 110A, and the liquid potting resin is applied to the end portion 11a portion on the sheet surface 10a. The liquid is discharged substantially vertically downward. The nozzle 50B is arranged above the other end portion 11b side portion of the hollow fiber membrane sheet 10 held by the holding means 110A, and the liquid potting resin is applied to the end portion 11b side portion of the sheet surface 10a. The liquid is discharged substantially vertically downward.

  In the manufacturing method using the manufacturing apparatus 100A, the two end portions 11a and 11b of the laminate of the hollow fiber membrane sheet 10 are respectively inserted into the water collecting pipes 12a and 12b, and are hollowed on the substrate portion 112A of the holding means 110A. The yarn film 16 is curved in the length direction so as to protrude upward in the length direction, and both end portions 11a and 11b side portions of the sheet surface 10a of the hollow fiber membrane sheet 10 are respectively perpendicular to the vertical direction. And keep it tilted. In this state, the potting resin is discharged downward from the two nozzles 50A and 50B on the respective end portions 11a and 11b side of the hollow fiber membrane sheet-like material 10, and the potting resin is transferred to the upper sheet surface 10a and collected. It is injected into the water pipes 12a and 12b and cured. In such an embodiment, since both ends 11a, 11b in the length direction of the hollow fiber membrane sheet 10 can be fixed to the water collecting pipes 12a, 12b at the same time, productivity can be increased and automation can be achieved. The cost is also lower.

  As described above, in the method for manufacturing a hollow fiber membrane module of the present embodiment, the end of the hollow fiber membrane sheet is fixed with a water collecting pipe, and the sheet surface of the hollow fiber membrane sheet is perpendicular to the vertical direction. The potting resin is injected in a tilted state. Therefore, potting resin can be easily injected without widening the slit-shaped opening of the water collecting pipe, and it is possible to suppress damage of the hollow fiber membrane sheet due to contact with the nozzle, and automation of the injection operation by the machine is also easy. It is.

  In addition, the manufacturing method of the hollow fiber membrane module of this invention is not limited to an above described method. For example, the number of laminated hollow fiber membrane sheets may be 3 or less, or 5 or more. Moreover, the method of providing a water collection pipe | tube in the both ends of one hollow fiber membrane sheet-like thing may be sufficient. Further, in the method for producing a hollow fiber membrane module of the present invention, a water collecting pipe is attached only to one end in the length direction of the hollow fiber membrane sheet, and the other end is opened with a resin or the like. It may be a method of closing the end face.

  In the present invention, in the potting process, a potting jig having a slit-like opening formed separately from the water collecting pipe may be used. Specifically, instead of the water collecting pipe, after performing the potting process in the same manner as described above except using a potting jig prepared separately from the water collecting pipe, from the end of the hollow fiber membrane sheet-like material A method of removing the potting jig and attaching a water collecting pipe to the end may be used. In this case, the method for attaching the water collecting pipe to the end of the hollow fiber membrane sheet after the potting step may be a method in which the end is liquid-tightly fixed to the water collecting pipe. For example, a method using an adhesive And a method of heating and welding after mounting the water collecting pipe. Further, when the end of the hollow fiber membrane sheet can be fixed in a liquid-tight manner only by sandwiching the end portions of the hollow fiber membrane sheet between the pair of side wall portions of the water collecting pipe, the end portions may be sandwiched only between the pair of side wall portions of the water collecting pipe. In this method, for example, in addition to the potting device, a hollow fiber membrane module manufacturing apparatus further including a water collecting pipe attaching device for removing the potting jig and attaching the water collecting pipe can be used.

  The manufacturing method of the hollow fiber membrane module of the present invention is not limited to a method using a hollow fiber membrane sheet material in which each hollow fiber membrane is previously bound by a binding portion. For example, a method using a hollow fiber membrane sheet-like material in which end portions in the length direction of each hollow fiber membrane are preliminarily bundled in a bundle with a cured potting resin may be used.

  The apparatus for producing a hollow fiber membrane module of the present invention is not necessarily limited to the one described above, and can be implemented with appropriate modifications without departing from the scope of the invention.

DESCRIPTION OF SYMBOLS 1 Hollow fiber membrane module 10 Hollow fiber membrane sheet-like material 10a, 10b Sheet surface 12a, 12b Water collecting pipe 14 Potting part 16 Hollow fiber membrane

Claims (11)

A hollow fiber membrane sheet in which a plurality of hollow fiber membranes are arranged in a sheet form, and a water collecting pipe provided at an end in the length direction of the hollow fiber membrane in the hollow fiber membrane sheet A hollow fiber membrane module manufacturing method in which the hollow fiber membranes are fixed to each other by a potting resin cured product in the housing portion of the hollow fiber membrane sheet-like material housed in the water collecting pipe,
The end portion is fixed with a potting jig, and in a state where the sheet surface of the hollow fiber membrane sheet is inclined with respect to the vertical direction, liquid potting resin is supplied from the nozzle in the slit-like shape of the potting jig. A method of manufacturing a hollow fiber membrane module, comprising a potting step of injecting and curing the potting jig from the opening and fixing the hollow fiber membranes at the housing portion.   The method for producing a hollow fiber membrane module according to claim 1, wherein a water collecting pipe is used as the potting jig.   The manufacturing method of the hollow fiber membrane module of Claim 1 which removes the said potting jig | tool from the said edge part after the said potting process, and attaches the said water collection pipe | tube to the said edge part.   The manufacturing method of the hollow fiber membrane module as described in any one of Claims 1-3 whose angle which the said sheet surface and a perpendicular direction make is 10-60 degrees.   The hollow fiber membrane module according to any one of claims 1 to 4, wherein the potting resin is injected into the potting jig while moving the nozzle in the width direction of the hollow fiber membrane sheet. Production method.   The hollow fiber membrane according to any one of claims 1 to 4, wherein the potting resin is injected into the potting jig while moving the hollow fiber membrane sheet in the width direction with respect to the nozzle. Module manufacturing method.   The method for producing a hollow fiber membrane module according to any one of claims 1 to 6, wherein the nozzle is positioned above the hollow fiber membrane sheet.   The said potting resin is transmitted to the said sheet | seat surface, it inject | pours in the said potting jig from the slit-shaped opening part of the said potting jig, and is hardened | cured. Manufacturing method of hollow fiber membrane module.   The manufacturing method of the hollow fiber membrane module as described in any one of Claims 1-8 which supplies the said potting resin only to one sheet surface of a pair of sheet surfaces of the said hollow fiber membrane sheet-like material.   Both ends of the hollow fiber membrane in the length direction of the hollow fiber membrane sheet are fixed by the potting jig, and the hollow fiber membrane sheet is moved up in the length direction of the hollow fiber membrane. The potting treatment in which the liquid potting resin is fixed to both ends using two nozzles with the sheet surface curved at both ends and inclined at both ends. The manufacturing method of the hollow fiber membrane module of Claim 9 which inject | pours in the said potting jig | tool from each of the slit-shaped opening parts of a tool, and makes it harden | cure. A hollow fiber membrane sheet in which a plurality of hollow fiber membranes are arranged in a sheet form, and a water collecting pipe provided at an end in the length direction of the hollow fiber membrane in the hollow fiber membrane sheet An apparatus for producing a hollow fiber membrane module in which the hollow fiber membranes are fixed to each other by a hardened product of potting resin in a housing portion of the hollow fiber membrane sheet-like material housed in the water collecting pipe,
Holding means for holding the hollow fiber membrane sheet with the end fixed by a potting jig in a state where the sheet surface is inclined with respect to the vertical direction;
An apparatus for manufacturing a hollow fiber membrane module, comprising a potting device including a nozzle for discharging a liquid potting resin.

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