WO2011105495A1

WO2011105495A1 - Header member, membrane module, and method for manufacturing membrane module

Info

Publication number: WO2011105495A1
Application number: PCT/JP2011/054158
Authority: WO
Inventors: 譲石橋; 中田　秀一
Original assignee: 旭化成ケミカルズ株式会社
Priority date: 2010-02-25
Filing date: 2011-02-24
Publication date: 2011-09-01
Also published as: TW201143876A; JP2013099703A

Abstract

Closed-end tubular header members (9) are mounted to the ends of a hollow fiber membrane bundle (7) and are affixed to the hollow fiber membrane bundle (7) by a sealing material (S) filled into and solidified in the inside of the closed-end header members (9). The header members (9) each comprises: an inlet-side tube section (21) provided to the inlet side into which the hollow fiber membrane bundle (7) is inserted; and an end-side tube section (23) having an inner diameter smaller than that of the inlet-side tube section (21) and provided further toward the end side than the inlet-side tube section (21). A step (St) is formed between the inner surface of the inlet-side tube section (21) and the inner surface of the end-side tube section (23). Annular grooves (21a, 23a, 23b) extending about the axis (L) of the header member (9) are formed in the inner surface of the inlet-side tube section (21) and/or the inner surface of the end-side tube section (23).

Description

Header member, membrane module, and membrane module manufacturing method

The present invention relates to a header member, a membrane module, and a method for manufacturing the membrane module for manufacturing a membrane module having a hollow fiber membrane bundle.

Hollow fiber membranes are known as membranes used in membrane filtration methods using microfiltration membranes and ultrafiltration membranes. Membrane modules using hollow fiber membranes are widely used for various membrane separation applications because they have a large membrane area and can be downsized. The hollow fiber membrane module generally includes a hollow fiber membrane bundle composed of a plurality of hollow fiber membranes, and a sealing and fixing portion in which both ends of the hollow fiber membrane bundle are bonded and sealed in a state where both ends of the hollow fiber membrane bundle are open. And a casing that accommodates the hollow fiber membrane bundle sealed by the sealing and fixing portion. On the other hand, a cartridge-type membrane module that is detachably inserted into a case called a housing without a casing is also known (see Patent Document 1). The structure of the cartridge type membrane module is basically the same as the structure of the normal membrane module fixed in the casing, but a protective member called a protective net or a protective cylinder is attached so as to surround the hollow fiber membrane bundle. And is housed in the housing.

When manufacturing a cartridge type membrane module, for example, the end of the hollow fiber membrane bundle is attached so that a bottomed cylindrical header member is covered, and a sealing material is placed inside the header member using a centrifugal casting method. To solidify. Next, when the hollow fiber membrane bundle is fixed to the header member via the sealing material, a part of the end side of the header member is cut together with the end portion of the hollow fiber membrane bundle, and as a result, the hollow fiber A module end surface having an opening communicating with the inside of the membrane is formed. Manufacturing the membrane module using the header member increases the dimensional stability of the membrane module as a finished product.

Special table 2007-503298

In recent years, diatomaceous earth filtration has been used in the production of brewed beverages such as beer and wine. However, in recent years, membrane separation methods that do not use diatomaceous earth have been adopted from the viewpoint of environmental protection, and the market for membrane modules for diatomaceous earth substitutes has expanded. is doing. In this field, a cartridge type cartridge is used which is filtered under high pressure (carbon dioxide pressure) conditions and inserted into a stainless steel housing. In the manufacturing process of the brewed beverage, after passing through a filtration step at several degrees C., a chemical solution washing step at about 80 ° C. for recovering the filtration performance by removing fouling substances deposited on the membrane surface by filtration is repeatedly performed. . That is, in the course of a series of filtration operations, the hollow fiber membrane module is repeatedly exposed to low and high temperature environments. By repeating these low-temperature filtration step and high-temperature cleaning step, when peeling occurs between the inner surface in contact with the sealing material and the sealing material in the conventional header member, the peeling easily grows, resulting in a film. The quality of the module may be degraded.

The present invention has been made in view of such problems, and particularly in the filtration of brewed beverages such as beer fermentation liquor, even under severe operating environments in which a low temperature filtration step and a high temperature washing step are repeated, a sealing material Providing a header member, a membrane module, and a method for manufacturing the membrane module that contributes to improving the quality of the membrane module by suppressing the occurrence or growth of peeling between the inner surface in contact with the sealing material filled in the inside Objective.

The present invention relates to a bottomed tubular header member that is attached to an end of a hollow fiber membrane bundle and is fixed to the hollow fiber membrane bundle by filling and solidifying a sealing material therein. An inlet side cylindrical portion provided on the inlet side into which is inserted, an inner diameter smaller than the inlet side cylindrical portion, and an end side cylindrical portion provided on the end side of the inlet side cylindrical portion, A step is formed between the inner surface of the inlet side cylindrical portion and the inner surface of the end side cylindrical portion, and at least one inner surface of the inlet side cylindrical portion and the end side cylindrical portion extends along the axis of the header member. An annular groove is formed.

According to the present invention, even if peeling occurs on the inlet side of the header member, a step is formed between the inner surface of the inlet side cylindrical portion and the inner surface of the end side cylindrical portion. Propagation of delamination from the tube portion side to the end portion side tube portion is prevented, and therefore, delamination growth is suppressed. Further, since the sealing material filled in the header member enters the annular groove and is solidified, the contact surfaces of the header member and the sealing material are fitted in a concave-convex shape and firmly bonded. It is effective for suppressing the occurrence or growth of peeling. As a result, the quality of the membrane module can be improved.

Furthermore, it is preferable that the end side tube portion of the header member has a cylindrical body portion and a bottom portion integrally formed with the body portion.

Furthermore, it is preferable that the groove includes a shallow groove formed in the inlet side cylinder portion and a deep groove formed in the end portion side cylinder portion and deeper than the shallow groove. When filling the inside of the header member with the sealing material, for example, an inlet for the sealing material is formed on the end side of the header member, and the sealing material is filled through the inlet. The deeper the groove formed on the inner surface of the header member, the stronger the bond between the sealing material and the header member, which is advantageous in that it prevents peeling. However, in the method of filling the sealing material from the end portion side of the header member, the inlet side tube portion is less likely to enter the sealing material than the end portion side tube portion, so the groove of the inlet side tube portion is made too deep. And a gap may arise between a sealing material and a header member, without a sealing material entering. On the other hand, since the sealing material easily enters the end side cylinder portion as compared with the inlet side cylinder portion, the sealing material can be sufficiently introduced even if the depth of the groove is positively increased. That is, according to the above configuration, when the sealing material is filled from the end side of the header member, the header member and the sealing material are firmly bonded while the sealing material is reliably filled. This is easy to realize, and is effective for suppressing the growth of peeling even under extremely severe operating conditions in which the range of temperature change in the high pressure (for example, carbon dioxide pressure) and the filtration and cleaning steps exceeds 60 ° C.

Further, it is preferable that an annular convex portion along the axis of the header member is formed on the inner surface of the end side cylindrical portion of the present invention. The sealing material filled in the header member fills the gap formed between the hollow fiber membrane bundle and the header member, and covers the convex portion formed on the inner surface of the end side cylinder portion. The sealing material filled in the header member heat shrinks in the process of solidification, but in this case, the sealing material that solidifies the convex portion sandwiches the convex portion so that the sealing material solidifies. Delamination in the process is prevented. As a result, it is effective in suppressing the growth of peeling and improving the quality of the membrane module.

The membrane module according to the present invention includes a cylindrical header portion formed using the header member, a hollow fiber membrane bundle composed of a plurality of hollow fiber membranes inserted into the header portion, and a hollow fiber membrane bundle. And a module end face in which the inside of the hollow fiber membrane is opened.

According to the present invention, even if separation occurs on the inlet side of the header portion, a step is formed between the inner surface of the inlet side cylindrical portion and the inner surface of the end side cylindrical portion. Propagation of peeling from the cylinder part to the end side cylinder part is prevented. Furthermore, since the contact surfaces of the header portion and the sealing material are fitted in a concavo-convex shape and firmly bonded, it is possible to contribute to improving the quality of the membrane module.

Further, the membrane module further includes a cylindrical protective member that surrounds the hollow fiber membrane bundle in an annular shape and is fixed to the header portion together with the hollow fiber membrane bundle by a sealing portion. The protective member includes a plurality of protective members. It is preferable that a through-hole and a linear protrusion protruding in the axial direction of the protection member from the end fixed to the header portion are provided. The hollow fiber membrane bundle is well held by the protective member and protected from external impacts. Moreover, the linear protrusion part is provided in the edge part of the protection member so that it may protrude in the axial direction of a protection member. For example, when the end portion of the protective member is formed by a flat circumference without a protruding portion, if peeling occurs at the end portion, the peeling easily propagates in the circumferential direction, and the peeling easily grows. However, according to the above configuration, since the protrusion formed at the end of the protective member becomes an obstacle and the propagation of peeling in the circumferential direction is prevented, it is effective in suppressing the growth of peeling.

Further, it is preferable that the protective member has a net-like shape and has a plurality of meshes that form through holes, and the projecting portion is formed so as to protrude from each of the plurality of meshes that are annularly connected at the end of the protective member. is there. By providing a plurality of protrusions corresponding to each of the plurality of meshes, the protrusions are arranged at substantially equal intervals in the circumferential direction, and the propagation of peeling in the circumferential direction can be effectively suppressed.

Further, the present invention provides a method of manufacturing a membrane module using the header member described above, a step of bundling a plurality of hollow fiber membranes to form a hollow fiber membrane bundle, and the header member at the end of the hollow fiber membrane bundle. After the step of mounting and filling the liquid sealing material inside the header member, the step of solidifying the sealing material filled inside the header member to form the sealing portion, and the sealing portion being formed Cutting the part of the end side of the header member together with the end part of the hollow fiber membrane and the part of the sealing part to form a module end surface in which the inside of the plurality of hollow fiber membranes is opened, It is characterized by including.

According to the present invention, in the process of forming the sealing portion, even if peeling occurs on the inlet side of the header member, a step is formed between the inner surface of the inlet side cylindrical portion and the inner surface of the end side cylindrical portion. As a result, propagation of separation from the inlet side cylinder part side to the end side cylinder part is prevented by this step, and the sealing material filled in the header member enters the annular groove and solidifies. Therefore, since the contact surfaces of the header member and the sealing material are fitted in a concavo-convex shape and are firmly bonded, a high quality membrane module can be manufactured.

According to the present invention, it is possible to improve the quality of the membrane module by suppressing the occurrence or growth of peeling with the sealing material filled in the inside.

FIG. 1 is an exploded perspective view of a membrane module precursor used for manufacturing a cartridge module according to an embodiment of the present invention. 2A and 2B are views showing the header member according to the present embodiment, in which FIG. 2A is a bottom view, and FIG. 2B is a cross-sectional view taken along line bb in FIG. 3A and 3B are views showing a cylindrical protective member, in which FIG. 3A is a side view, and FIG. 3B is a partial cross-sectional view taken along line bb in FIG. 4A and 4B are views showing the module precursor, wherein FIG. 4A is a side view, FIG. 4B is a cross-sectional view taken along line bb in FIG. 4A, and FIG. It is sectional drawing along c line | wire, Comprising: A module end surface is shown. FIG. 5 is an enlarged cross-sectional view of the inlet side of the header member in a state where the hollow fiber membrane bundle is inserted. FIG. 6 is an enlarged cross-sectional view showing a state in the middle of the header member being filled with an adhesive. FIG. 7 is an exploded perspective view for explaining a mode in which the cartridge module is attached to the housing. FIG. 8 is a flowchart showing a procedure for manufacturing the cartridge module. FIG. 9 is a cross-sectional view for explaining an embodiment of a groove in the present invention, where (a) is a square groove, (b) is a triangular groove, (c) is a round groove, (d) is a V-shaped groove, (E) is sectional drawing of a dovetail groove.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Various methods are used to remove microbial particles such as yeast and bacterial cells from an aqueous solution. In particular, membrane filtration methods using microfiltration membranes and ultrafiltration membranes can remove all microorganisms. It is possible and can be processed continuously in large quantities, so it is suitable for industrial use. As a membrane filtration device used for such a membrane filtration method, a hollow fiber membrane bundle accommodated in a casing is fixed to the casing and modularized, or a hollow fiber membrane bundle without a casing is provided. There is a type in which a membrane module is integrated and the membrane module is detachably accommodated in a case called a housing. The membrane module according to the present embodiment is a type called the latter cartridge module.

The cartridge module 1 (see FIG. 7) is used by being detachably accommodated in a predetermined housing 3. The cartridge module 1 manufactures a module precursor 5 by fixing header members 9 (see FIG. 1) to both ends of a bundle of hollow fiber membranes (hereinafter referred to as “hollow fiber membrane bundle”) 7, for example. The module precursor 5 is manufactured by cutting a part of both ends of the module precursor 5 to form a module end face 6 in which the end of the hollow fiber membrane 7a is opened. First, the module precursor 5 will be described.
(Module front)

As shown in FIGS. 1 and 4, the module precursor 5 includes a bottomed tubular header member 9 that is attached to both ends of the hollow fiber membrane bundle 7, and the hollow fiber membrane bundle 7 is inserted through the hollow fiber membrane bundle 7. The cylindrical protective member 11 that protects the bundle 7 and the density variation of the hollow fiber membrane 7a that is inserted into the end of the hollow fiber membrane bundle 7 are corrected. And a sealing portion for bonding (bonding) the hollow fiber membrane bundle 7, the protective member 11, the cross plate 13 and the header member 9 with the sealing material S filled and solidified in the header member 9. 15.

The header member 9 (see FIG. 2) is made of a polymer material such as a polysulfone resin such as polysulfone, polyethersulfone or polyphenylenesulfone, a polyester resin such as polycarbonate, polyethylene terephthalate or polybutylene terephthalate, 6-nylon or the like. Examples include polyamide resins such as 6,6-nylon and styrene resins such as ABS and AES. The material of the header member 9 is preferably selected in consideration of the use conditions of the membrane module. And in the case of the membrane module used for manufacture of the above-mentioned brewed beverage, a polysulfone resin is preferably used from the viewpoint of heat resistance and chemical resistance.

The header member 9 has a bottomed cylindrical shape (cup shape), an inlet side cylinder portion 21 provided on the inlet side into which the hollow fiber membrane bundle 7 is inserted, and an end side cylinder provided on the end side. Part 23. The inlet side cylinder part 21 and the end part side cylinder part 23 have different inner diameters, and the end part side cylinder part 23 has a smaller inner diameter than the inlet side cylinder part 21. The ratio (inner diameter ratio of the header member 9) when the inner diameters r1 and r2 of the inlet side cylindrical portion 21 and the end side cylindrical portion 23 are compared with each other, that is, r2 / r1 is 0.5 or more and 0.99 or less. It is preferable. Moreover, from the relationship with the number of hollow fiber membranes (module membrane area) which can be filled, 0.8 or more and 0.98 or less are more preferable, and 0.85 or more and 0.95 or less are particularly preferable. Here, r1 and r2 are inner diameters at the position of a seating surface 25 described later.

In addition, regarding the end side tube portion 23 provided on the end side with respect to the entrance side tube portion 21, the “end side” means a side opposite to the entrance side. And in the case of a bottomed cylindrical shape like this embodiment, it means the bottom side, and in the case of a form having no bottom portion, it means the other open end side.

The inner surfaces of the inlet-side cylinder portion 21 and the end-side cylinder portion 23 communicate with each other via an annular seat surface 25 formed on a virtual plane substantially orthogonal to the axis L of the header member 9. The seat surface 25 forms a step St (see FIG. 5) having a height difference between the inner surfaces of the inlet-side cylinder portion 21 and the end-side cylinder portion 23.

A plurality of annular shallow grooves 21 a along the axis L of the header member 9 are formed on the inner surface of the inlet side cylinder portion 21. In the present embodiment, the shape of the shallow groove 21a is exemplified by a triangular groove (a groove having a shape in which a right triangle is cut out in a cross-sectional view) (see FIG. 9B). Groove (see FIG. 9A), round groove (see FIG. 9C), dovetail groove (see FIG. 9E), V-shaped groove (mountain groove) (see FIG. 9D), etc. A known groove shape can be adopted. These grooves may be formed at the same time when the header member 9 is injection-molded, or may be formed by post-processing after the header member 9 is injection-molded.

Here, with respect to the shape of the shallow groove 21a, a supplementary explanation will be given by taking as an example a case where a centrifugal casting method is employed as a method of filling the sealing material S inside the header member 9 (see FIG. 9). In this case, considering the ease of air bubble removal, the ease of processing, the cost for mass production, etc., the shallow groove 21a is one of four types of square grooves, triangular grooves, round grooves, and V-shaped grooves. Or a mode in which the above four types of groove shapes are appropriately combined with the plurality of shallow grooves 21a, and any one of the three types of grooves: a square groove, a triangular groove, and a V-shaped groove. A mode in which the above three types of groove shapes are appropriately combined with the shape or the plurality of shallow grooves 21a is preferable.

The number of shallow grooves 21a formed in the inlet side cylinder portion 21 and the processing position are appropriately determined in consideration of the size of the header member 9 or the ease of peeling between the header member 9 and the sealing material S. it can.

A plurality of annular deep grooves 23 a along the axis L of the header member 9 are formed on the inner surface of the end-side cylinder 23, and a plurality of annular shallow grooves 23 b along the axis L of the header member 9 are formed. Has been. The deep grooves 23a are provided at two locations near the inlet side cylinder portion 21, and the shallow grooves 21a are formed in a predetermined region near the bottom portion 9b. The shallow groove 23b of the end side cylinder part 23 has substantially the same shape and depth as the shallow groove 21a of the inlet side cylinder part 21.

The deep groove 23a according to the present embodiment exemplifies a form of a square groove (a groove having a shape in which a rectangle is cut out in a cross-sectional view), but as the groove shape, a square groove, a triangular groove, a round groove, an ant groove, In addition, known groove shapes including a V-shaped groove can be widely adopted. These grooves may be formed at the same time when the header member 9 is injection-molded, or may be formed by post-processing after the header member 9 is injection-molded.

Here, the shape of the deep groove 23a will be described supplementarily by taking as an example a case where the centrifugal casting method is adopted as a method of filling the sealing material S inside the header member 9. In this case, considering the ease of air bubble removal, the ease of processing, the cost of mass production, etc., the deep groove 23a is any one of four types of grooves: a square groove, a triangular groove, a round groove, and a V-shaped groove. An embodiment in which the above four types of groove shapes are appropriately combined with the shape or the plurality of shallow grooves 21a is preferable, and any one of the three types of groove shapes of a square groove, a triangular groove, and a V-shaped groove, Or the aspect which combines the said three types of groove shape suitably with respect to the some shallow groove | channel 21a is preferable.

The deep groove 23a is deeper than the shallow groove 21a and the shallow groove 23b formed in the inlet side cylinder portion 21, and the average of the shallow groove 21a and the shallow groove 23b with respect to the average depth d1 of the deep groove 23a. The ratio of the depth d2, that is, d2 / d1, is preferably 0.1 or more and 0.9 or less, and more preferably 0.2 or more and 0.8 or less. Here, the “groove depth” is the depth of the deepest portion in one groove, and the “average depth” is an arithmetic average value of each of the plurality of grooves.

In the present embodiment, of the two deep grooves 23a, one deep groove 23a on the inlet side is provided so as to be aligned with the seat surface 25 forming the step St, and as a result, the seat surface 25 and the deep groove An annular first convex portion 23 c is formed along the axis L of the header member 9. In addition, an annular second convex portion 23 d is formed between the two deep grooves 23 a arranged adjacent to each other along the axis L of the header member 9.

Note that the number and processing positions of the deep grooves 23a and shallow grooves 23b or the

convex portions

23c and 23d formed in the end-side cylinder portion 23 take into consideration the size of the header member 9 and the cutting position for forming the module end surface 6. Can be decided arbitrarily.

In addition, in this embodiment, the header member 9 is used in a mode including a bottomed cylindrical end-side cylinder portion 23 (see FIG. 2B) in which a bottom portion 23f is integrally formed with a cylindrical trunk portion 23e. explained. However, the header member according to the present invention is not limited to this mode, and includes, for example, a cylindrical mode composed of an end side cylindrical portion and an inlet side cylindrical portion that do not have a bottom portion. In addition, in the case of the latter mode, the end side cylinder part of the cylindrical body and the bottom part separate from the end side cylinder part are used in a liquid-tight manner before centrifugal casting. From the viewpoint of simplicity in manufacturing the membrane module, the former mode is preferable.

Next, the hollow fiber membrane bundle (porous membrane) 7 will be described. The hollow fiber membrane bundle 7 is formed by bundling a large number of hollow fiber membranes 7a. The material of the hollow fiber membrane 7a is not particularly limited, and examples thereof include polyethylene, polypropylene, polyvinylidene fluoride, polysulfone, polytelsulfone, ethylene-vinyl alcohol copolymer, polytetrafluoroethylene, polyacrylonitrile, and polyether ketone. In particular, in the case of a membrane module used for producing a brewed beverage, a polysulfone resin such as polysulfone or polytelsulfone is preferably used from the viewpoint of heat resistance and chemical resistance.

The hollow fiber membrane bundle 7 is inserted into the cylindrical protective member 11 and is protected by the protective member 11. Although the shape of the protection member 11 can be selected according to the use etc., it is usually cylindrical in many cases, and in this embodiment, the cylindrical shape will be described as an example. The material of the protective member 11 can be selected according to the type of fluid to be treated and the separation component, for example, polyethylene, polypropylene, polyvinyl chloride, polycarbonate, acrylic polymer, polysulfone, polyethersulfone and other plastics, stainless steel, etc. It may be a metal. Usually, polyethylene, polypropylene, polyvinyl chloride, etc. are often used. In particular, in the case of a membrane module used for manufacturing a brewed beverage, a polysulfone-based resin such as polypropylene, polysulfone, or polytelsulfone is preferably used from the viewpoint of heat resistance and chemical resistance.

The protective member 11 has a net shape having a plurality of meshes forming the rectangular through holes H (see FIG. 3), and has a substantially cylindrical shape in which a plurality of meshes are regularly arranged. Note that the end of the protection member 11 is inserted into the header member 9 and is installed substantially concentrically with the header member 9. Therefore, in the following description, the axis of the protection member 11 is described as the same axis L as the header member 9.

The protective member 11 includes a plurality of vertical line portions 11a along the axis L direction and a plurality of circle portions 11b along the circumferential direction. A plurality of rectangular through-holes H are formed in the protection member 11 by integrally forming the plurality of vertical line portions 11a and the plurality of circle portions 11b so as to cross each other. At both ends in the direction of the axis L of the protection member 11, tips (projections) 11c of the plurality of vertical line portions 11a are formed so as to protrude from the circle portion 11b. As a result, the protruding portions 11c of the plurality of vertical line portions 11a embody a form that is formed so as to protrude from each of the plurality of meshes that are continuous in a ring shape.

In addition, although the protection member 11 which concerns on this embodiment illustrates cylindrical shape, this protection member 11 may be polygonal cylinder shape.

The cross plate 13 is preferably formed using the same material as the sealing material S that actually forms the sealing portion 15. For example, it is formed of an epoxy resin, a vinyl ester resin, a urethane resin, an olefin polymer, a silicone resin, a fluorine-containing resin, or the like. The cross plate 13 has a function as an insert for adjusting the number of hollow fiber membranes 7 a so that the density is not biased (variation) in the circumferential direction, and is inserted into the end portion of the hollow fiber membrane bundle 7. It is attached. In the present embodiment, the cross plate 13 will be specifically described as an example of the insert. However, the insert may be formed of one flat plate or five or more partition pieces extending radially. It may be provided.

The cross plate 13 (see FIG. 4) has two rectangular flat plates fitted so as to be orthogonal to each other, and has a shape having four partition pieces 13a extending radially from the center of the intersecting line. Yes. Moreover, the surface of the partition piece 13a is intentionally roughened, and consideration is given to increasing the bonding (adhesion) strength when the sealing material S is filled and solidified. Moreover, the dimension of the partition piece 13a corresponds to substantially half of the inner diameter of the end-side cylinder portion 23 of the header member 9, and the inner diameter of the virtual cylinder and the end-side cylinder passing through the outer edges of the four partition pieces 13a. The ratio with the inner diameter of the portion 23, that is, the inner diameter of the virtual cylinder / the inner diameter of the end-side cylinder portion 23 is formed to be 0.5 to 0.99. A large number of hollow fiber membrane bundles 7 are substantially divided into four equal parts inside the end-side cylinder portion 23 by the four partition pieces 13a.

A cross plate 13 is inserted into both ends of the hollow fiber membrane bundle 7 inserted into the protective member 11, and a large number of hollow fiber membrane bundles 7 are visually divided by the cross plate 13. The hollow fiber membrane bundle 7 is inserted into the header member 9 with the cross plate 13 attached, and the front end of the protection member 11 surrounding the hollow fiber membrane bundle 7 forms a step St inside the header member 9. Abut. In this state, the end portion of the hollow fiber membrane bundle 7 to which the cross plate 13 is attached fits in the end portion side tubular portion 23 of the header member 9.

After the header members 9 are attached to both ends of the hollow fiber membrane bundle 7, the header member 9 is filled with a liquid sealing material S (also referred to as “sealing material” or “adhesive”) to be hollow. The end of the thread membrane bundle 7 is sealed. For the sealing material S, for example, an epoxy resin, a vinyl ester resin, a urethane resin, an olefin polymer, a silicone resin, a fluorine-containing resin, or the like is used. Further, the filling of the sealing material S is performed through an introduction port 9a formed in the bottom 9b of the header member 9, and is appropriately executed by, for example, a centrifugal casting method or a stationary casting method. The sealing material 15 filled in the header member 9 is solidified to form the sealing portion 15 and the module precursor 5 is formed.
(Cartridge module)

1, 4, and 7, the cartridge module (membrane module) 1 is manufactured using a module precursor 5. In the module precursor 5, both ends of the hollow fiber membrane 7 a are closed by the sealing portions 15, and in order to complete the cartridge module 1, a module end face 6 is formed in which both ends of the hollow fiber membrane 7 a are opened. There is a need to. In the present embodiment, a module end surface 6 (see FIG. 4C) is formed by cutting and removing a part on the end side of the header member 9, and the cartridge module 1 is completed.

The cartridge module 1 includes a cylindrical header portion 1a formed using a header member 9, a hollow fiber membrane bundle 7 including a plurality of hollow fiber membranes 7a inserted into the header portion 1a, and a hollow fiber membrane bundle 7 Is sealed to the header portion 1a, the module end face 6 in which the inside of the hollow fiber membrane 7a is opened, and the hollow fiber membrane bundle 7 are surrounded in an annular shape, and the sealing portion 15 together with the hollow fiber membrane bundle 7 is enclosed. And a cylindrical protective member 11 fixed to the header portion 1a.

The cartridge module 1 constitutes a filtration membrane unit by being inserted into the housing 3 and detachably attached. The shape of the housing 3 can be selected according to the application and the like, but usually it is often a cylindrical shape. The material of the housing 3 can be selected according to the type of fluid to be treated and the separation component, for example, plastic such as polyvinyl chloride, polycarbonate, acrylic polymer, polysulfone, polyethersulfone, or metal such as stainless steel. Also good. Usually, stainless steel, polyvinyl chloride, polysulfone, etc. are often used. In particular, in the case of a membrane module used for manufacturing a brewed beverage, stainless steel is preferably used from the viewpoints of heat resistance, chemical resistance, and pressure resistance (mechanical strength).

The structure will be described in detail by taking the cylindrical housing 3 as an example. The housing 3 includes a cylindrical body 3a that houses the cartridge module 1, and a pair of caps 3b that are assembled to both ends of the body 3a by screwing. A seal ring 3c is provided between the body 3a and the cap 3b by tightening the cap 3b. The body 3a is formed with a pipe portion 3d that serves as an outlet for concentrated water, an inlet for raw water, or the like at both ends. The cap 3b has a substantially conical shape, and a pipe portion 3e serving as an inlet for raw water, an outlet for filtered water, or the like is formed at the top.
(Manufacturing method of cartridge module)

Next, a manufacturing method of the cartridge module (membrane module) 1 will be described with reference to FIG. First, a process of forming a hollow fiber membrane bundle 7 by bundling a plurality of hollow fiber membranes 7a is executed (step S1).

Specifically, a) a step of arranging a predetermined number of hollow fiber membranes 7a so as to be substantially parallel to the length direction, b) a step of trimming the hollow fiber membranes 7a to a predetermined length, c) hollow A step of closing the hollow portion of the thread membrane 7a. Further, d) a step of adjusting the opening degree of the pores at the end of the hollow fiber membrane 7a may be appropriately performed. As a method for adjusting the degree of opening, for example, a method of impregnating a glycerin aqueous solution into pores and then drying to obtain a state in which glycerin is contained in the pores can be mentioned. These unit steps a) to d) can be performed in the order described, or can be performed by appropriately changing the order.

Next, a module pre-assembly element assembly process is executed (step S2). Specifically, the bundled hollow fiber membrane bundle 7 is inserted into the protective member 11. Further, in order to divide the hollow fiber membrane bundle 7 evenly, the cross plate 13 is inserted into the portion protruding from the protective member 11, and the header member 9 is attached to both ends of the hollow fiber membrane bundle 7 in that state. Assemble the module precursor element.

Next, a process of filling the liquid sealing material S inside the header member 9 is executed (step S3). As the filling method of the sealing material S, there are a centrifugal casting method in which the sealing material S is filled using centrifugal force, a stationary casting method in which the sealing material S is filled using gravity, and the like. Then, the centrifugal casting method and the stationary casting method will be described as a representative.

The centrifugal casting method is performed using a centrifugal casting machine equipped with a jig called a centrifugal cassette. The structure in which the module precursor element is assembled is attached to the centrifuge cassette in a state of being laid horizontally, and rotates on a horizontal plane with the vertical axis as a rotation axis. Centrifugal force acts on the header member 9 by the rotation of the centrifugal cassette, and the sealing material S is filled in the header member 9 using this centrifugal force. There are two possible filling methods using centrifugal force, for example, depending on the length of the hollow fiber membrane bundle 7. One method is a method in which both ends are simultaneously subjected to centrifugal casting, and another method is a method in which centrifugal casting is performed twice on each side. For example, when performing each one side, it arrange | positions so that one edge part used as adhesion | attachment object may become an outer side of a centrifugal direction, and the other edge part may become an inner side of a centrifugal direction. The liquid sealing material S is transferred to the header member 9 side, which is the outer side in the centrifugal direction, using centrifugal force. Further, the sealing material S is introduced through the inlet 9a formed in the bottom 9b of the header member 9. Filled inside.

On the other hand, in the static casting method, the hollow fiber membrane bundle 7 on which the header member 9 is mounted is arranged in a state where it is erected along the vertical direction. One end of the hollow fiber membrane bundle 7 to be bonded is on the lower side, and the other end is on the upper side. The inside of the lower header member 9 is filled with a liquid sealing material S through the introduction port 9a of the bottom 9b. Here, the sealing material S is introduced by a water head difference or a pump or the like and is filled in the header member 9 without a gap. After that, when the fluidity of the sealing material S is lost, the top and bottom are reversed, and the sealing material S is filled in the header member 9 on the lower side in the same manner as described above.

The filling of the sealing material S in step S3 described above is performed while the sealing material S is in a liquid state. In addition, the filled sealing material S gradually loses fluidity as the reaction progresses with time, and becomes a solid state.

Next, a step of solidifying the sealing material S filled in the header member 9 to form the sealing portion 15 is executed (step S4). After the sealing material S is solidified and the sealing portion 15 is formed, curing is performed by heating at a predetermined temperature T1 (for example, 50 ° C.) for a predetermined time (step S5). Subsequently, heating is performed for a predetermined time at a temperature T2 (for example, 90 ° C.) higher than T1, and further curing is performed (step S6). By this operation, the module precursor 5 is completed.

Next, a part of the bottom 9b side of the header member 9 and a part of the sealing part 15 are cut together with the end of the hollow fiber membrane 7a to open the inside of the plurality of hollow fiber membranes 7a. (Step S7), and the cartridge module 1 is completed.

Next, effects of the header member 9 and the cartridge module 1 will be described. When the module precursor 5 is manufactured, the sealing material S is filled so as to fill the gap inside the header member 9 (see FIGS. 5 and 6), and further solidified to form the hollow fiber membrane bundle 7 and the cross plate 13. The protective member 11 and the inner surface of the header member 9 are bonded (coupled). The header member 9 has an inner diameter r1 of the inlet side cylinder portion 21 larger than an inner diameter r1 of the end side cylinder portion 23, and there is a step between the inner surfaces of the inlet side cylinder portion 21 and the end side cylinder portion 23. St is provided. In the process in which the sealing material S is solidified, the sealing material S slightly heat shrinks. Even if peeling occurs on the contact surface with the sealing material S in the inlet side cylindrical portion 21 due to this heat shrinkage, the propagation of peeling from the inlet side cylindrical portion 21 side to the end side cylindrical portion 23 is a step St. And therefore the growth of delamination is suppressed.

Further, deep grooves 23a and

shallow grooves

21a and 23b are formed on the inner surface of the header member 9, and the sealing material S enters the deep grooves 23a and the

shallow grooves

21a and 23b and is solidified. Therefore, the contact surfaces of the header member 9 and the sealing material S are fitted in a concavo-convex shape and firmly bonded (bonded), which is effective in suppressing the growth of peeling, and is effective in preventing peeling (leakage). For example, it can withstand heat and pressure during sterilization or radiation treatment. As a result, the quality of the cartridge module 1 can be improved.

Furthermore, a shallow groove 21a is formed in the inlet side cylinder portion 21 of the header member 9, and a deep groove 23a is formed in the end side cylinder portion 23 in addition to the shallow groove 21a. For example, since the sealing material S enters and solidifies deeper as the depth of the groove formed on the inner surface of the header member 9 is deeper, the deeper groove is firmly bonded to the header member 9. This is advantageous in terms of suppressing peeling. However, in the method of filling the sealing material S from the bottom 9 b side of the header member 9, the inlet-side cylindrical portion 21 is less likely to enter the sealing material S than the end-side cylindrical portion 23. If the groove is made too deep, there is a possibility that a gap is generated between the sealing material S and the header member 9 without the sealing material S entering. On the other hand, since the sealing material S is easier to enter in the end-side cylinder portion 23 than in the inlet-side cylinder portion 21, the sealing material S can be sufficiently inserted even if the depth of the groove is positively increased. Can do. That is, according to the header member 9, when the sealing material S is filled from the bottom 9 b side, the header member 9 and the sealing material S can be firmly filled while ensuring the filling of the sealing material S. Bonding is easy to realize, and it is effective in suppressing delamination or delamination growth. In addition, although the shallow groove 23b other than the deep groove 23a is formed in the edge part side cylinder part 23 which concerns on this embodiment, it is also possible to form only the deep groove 23a and to omit formation of the shallow groove 23b. is there.

Also, on the inner surface of the end-side cylinder portion 23 of the header member 9, annular first convex portions 23 c and second convex portions 23 d are formed along the axis L of the header member 9. When the sealing material S is filled in the header member 9, it covers the first and

second protrusions

23 c and 23 d. As described above, the sealing material S is thermally contracted in the process of solidification. In this case, the sealing material S covering the

convex portions

23c and 23d contracts so as to sandwich the

convex portions

23c and 23d. Peeling in the process in which the stop material S is solidified is prevented. As a result, it is effective in improving the quality of the cartridge module 1 by suppressing the growth of peeling.

Further, in the cartridge module 1 according to the present embodiment, since the header portion 1a is formed using the header member 9 described above, occurrence of peeling when the sealing portion 15 is formed by solidification of the sealing material S is generated. In addition, propagation is suppressed and high quality can be expected.

In addition, since the cartridge module 1 includes the cylindrical protective member 11 that surrounds the hollow fiber membrane bundle 7 in an annular shape, the hollow fiber membrane bundle 7 is held together by the protective member 11 and protected from external impacts and the like. Is done.

Further, the protection member 11 is formed with a linear (line-shaped) protruding portion 11c protruding in the direction of the axis L from both ends fixed to the header portion 1a. For example, when the end portion of the protective member 11 is formed by a flat circumference without the protruding portion 11c, if peeling occurs at this end portion, the peeling easily propagates in the circumferential direction, and the peeling grows. easy. However, according to the protective member 11 according to the present embodiment, since the protrusion 11c becomes an obstacle and propagation of peeling in the circumferential direction is prevented, it is effective in suppressing the growth of peeling. In addition, the effect of the protrusion part 11c can be confirmed by the presence or absence of occurrence of peeling visible from the appearance before and after the curing in the process of manufacturing the cartridge module 1.

Further, even when membrane filtration is performed using the cartridge module 1, there is a possibility that separation occurs between the header portion 1 a and the sealing portion 15 due to, for example, physical cleaning or chemical cleaning. There is. However, in this embodiment, since the header portion 1a and the sealing portion 15 are firmly bonded (bonded), the occurrence of peeling can be effectively prevented, and the case where peeling occurs temporarily. However, the growth of peeling can be effectively suppressed.

Moreover, according to the manufacturing method of the cartridge module (membrane module) 1 described above, even if peeling occurs on the inlet side of the header member 9 in the process of forming the sealing portion 15, Propagation of separation from the inlet side cylinder part 21 side to the end part side cylinder part 23 is prevented by the step St formed between the inner surface of the end side cylinder part 23. Further, since the sealing material S filled in the header member 9 enters into the annular

shallow grooves

21a and 23b and the deep grooves 23a and is solidified, the contact surfaces of the header member 9 and the sealing material S are in contact with each other. It fits in a concavo-convex shape and is firmly bonded (bonded), which is effective in suppressing the occurrence and growth of peeling. As a result, the cartridge module 1 with high quality can be manufactured.

The cartridge module (membrane module) 1 obtained by the above-described manufacturing method is a high pressure (carbon dioxide pressure) and several ° C. (low temperature) filtration step and a 70 ° C. (high temperature) washing step, particularly in the production of the aforementioned brewed beverage. Even in a severe operating environment that repeats the above, there is no separation between the inner surface in contact with the sealing material S and the sealing material S filled inside, and the stock solution does not leak to the filtration side, and is stable. Filtration can be performed.

Hereinafter, the present invention will be described more specifically based on examples and comparative examples, but the present invention is not limited to the following examples.

(Production Example 1 of Porous Hollow Fiber Membrane)
Polysulfone (SOLVAY ADVANCED POLYMERS, Udel P3500) 18% by weight and polyvinylpyrrolidone (BASF, Luvitec k80) 15% by weight were stirred and dissolved in N-methyl-2-pyrrolidone 62% by weight at 70 ° C. to obtain glycerin 5 Weight% was added and further stirred to prepare a film-forming stock solution. This film-forming stock solution was extruded from a double ring spinning nozzle (outer diameter 2.4 mm, intermediate diameter 1.2 mm, inner diameter 0.6 mm) together with 90 wt% NMP aqueous solution of internal coagulation liquid at 70 ° C. Through the distance, it was solidified in 80 ° C. water. At this time, the temperature from the spinneret to the coagulation bath was surrounded by a cylinder having a bottom area of 38 cm ² , and the temperature of the free running portion was 75 ° C. and the relative humidity was 100% (absolute humidity 240 g / m ³ ). At this time, after removing the solvent in water, the polyvinylpyrrolidone was decomposed in an aqueous 2000 ppm sodium hypochlorite solution for 15 hours and then washed with water at 90 ° C. for 3 hours to obtain a porous hollow fiber membrane. The obtained hollow fiber had an outer diameter of 2.3 mmφ, an inner diameter of 1.4 mmφ, a minimum pore diameter of 0.4 μm, and a pure water permeation amount per inner area at 25 ° C. of 15,800 L / m ² / hr / 100 kPa. . The hollow fiber membrane was immersed in a 30% by weight glycerin aqueous solution at 60 ° C. so that the pores of the hollow fiber membrane were impregnated with the glycerin aqueous solution, and then dried at 70 ° C. to prepare a membrane module.

(Production Example 2 of porous hollow fiber membrane)
Polysulfone (SOLVAY ADVANCED POLYMERS, Udel P3500) 20% by weight and tetraethylene glycol (Nippon Shokubai Co., Ltd.) 9% by weight were dissolved in 71% by weight of dimethylacetamide at 50 ° C. to prepare a membrane forming stock solution. This film-forming stock solution was extruded from a double ring spinning nozzle (outer diameter 2.4 mm, intermediate diameter 1.2 mm, inner diameter 0.6 mm) together with pure water of the internal coagulating liquid at 50 ° C., and passed through an idle running distance of 10 mm. And coagulated in water at 30 ° C. At this time, after removing the solvent in water, it was washed with water at 90 ° C. for 3 hours to obtain a porous hollow fiber membrane. The obtained hollow fiber had an outer diameter of 2.3 mmφ, an inner diameter of 1.4 mmφ, a molecular weight cut-off of 6,000, and a pure water permeation amount per inner area at 25 ° C. of 250 L / m ² / hr / 100 kPa. The hollow fiber membrane was immersed in a 30% by weight glycerin aqueous solution at 60 ° C. so that the pores of the hollow fiber membrane were impregnated with the glycerin aqueous solution, and then dried at 70 ° C. to provide a membrane module.

(Example of manufacturing hollow fiber membrane module)
A cartridge-type hollow fiber membrane module was produced using a header member and a net-like protective cylinder in which the bottom part and cylindrical body described below were integrally formed.

<Module structure>
(1) Header material: Polysulfone (transparent)
Entrance side tube: Height (inside dimension) 28 mm,
End side cylinder part: Height (inside dimension) 64mm
Tables 1 and 2 show the inner diameter of the inlet side cylinder part and the end side cylinder part and the shape and dimensions of the groove.
In addition, said header member was produced by cutting the material (diameter 200mm x length 1000mm) made from polysulfone.
(2) Net-shaped protective cylinder material: polypropylene shape: inner diameter 151 mm, outer diameter 159 mm, length 1020 mm,
Line width: 3.5 mm in the axial direction, 5 mm in the circumferential direction,
Opening 8.5mm (axial direction) x 12mm (circumferential direction),
The axial projections are shown in Tables 1 and 2.
(3) Hollow fiber membrane material: polysulfone Dimensions: inner diameter 1.4 mm, outer diameter 2.3 mm
Number: 2800 Membrane area: Inner area 12 m ² / module (4) Cross board material: Two-component mixed thermosetting epoxy resin (cured product of the same resin as the sealing material)
Shape: Cross Dimension: Thickness 5mm, Width 148mm, Axial length 80mm

"Production method"
The hollow fiber membranes whose hollow portions at both ends were previously closed were aligned in parallel and arranged into a bundle shape, and then cut into 1280 mm. The hollow fiber membrane bundle was inserted into a net-shaped protective cylinder, and a cross plate was inserted into the end of the hollow fiber membrane protruding from the net-shaped protective cylinder. At this time, the cross plate was arranged so that the hollow fiber membranes were evenly distributed to the respective sections divided into four by the cross plate.
Next, both ends of the hollow fiber membrane bundle were inserted into the header member, and then placed on the gantry to fix the header members at both ends to the gantry. Thereafter, the mount was mounted on a centrifugal cassette, and a liquid mixture of a two-component mixed thermosetting epoxy resin was injected from the bottom side of the header members at both ends and solidified by a centrifugal casting method. Next, after heating at 50 ° C. for 48 hours and further curing at 90 ° C. for 16 hours, the bottom ends of both header members were cut to open the hollow portions. The length of the header member after cutting is 60 mm, and the total length of the module is 1100 mm.

(Examples 1 to 8)
The example of the hollow fiber membrane module manufactured using the porous hollow fiber membrane of the manufacture example 1 and various header members is shown. Table 1 shows the shape and dimensions of the header member.
The hollow part and the cut end face in the manufactured membrane module were observed. The observation results are shown in Table 1. In addition, the “inner diameter ratio of the header member” in Table 1 means (inner diameter of the end side cylinder part) / (inner diameter of the inlet side cylinder part).
In Example 8, no separation was observed, but bubbles remained in the groove of the inlet side cylinder part.

(Comparative Examples 1 and 2)
A module was produced in the same manner as in Examples 1 to 8 except that a header member and a protective member having the shapes and dimensions shown in Table 2 were used, and observed in the same manner as in the example. The observation results are shown in Table 2. In the membrane module of Comparative Example 2, no peeling was observed at the stage after manufacture, but it was observed that bubbles remained in the square groove provided in the inlet side cylindrical portion. In addition, the “inner diameter ratio of the header member” in Table 2 means (inner diameter of the end side cylinder part) / (inner diameter of the inlet side cylinder part). Moreover, in the comparative example 1, the substantial groove | channel is not formed in the inner surface of an edge part side cylinder part, and the substantial groove | channel is not formed also in the inner surface of an entrance side cylinder part. Therefore, the groove of the end side cylinder part and the groove of the inlet side cylinder part shown in Table 2 are considered to be substantially the same depth, and the average depth of the groove of the inlet side cylinder part with respect to the groove of the end side cylinder part The ratio is described as “1.0”.

Example 9
Hereafter, the result of having performed the cooling / heating cycle test is shown.
The membrane module produced in the same manner as in Examples 1 to 6 was housed in a stainless steel housing and then attached to a filtration device, and the purified water cooled to 5 ° C. was passed for 2 hours and the purified water heated to 80 ° C. The process of passing water for 2 hours was repeated 1000 cycles. In this cooling / heating cycle test, the pressure at the inlet was set to 0.2 MPa, the pressure at the permeate side outlet was set to 0.15 MPa, and water was passed by a cross flow filtration method.
When the leak test was conducted by the method described later every 100 cycles until the end of the test (1000 cycles), there was no leak until 1000 cycles in each membrane module. Moreover, when the hollow fiber membrane module was taken out from the housing and the header part was observed in detail, peeling was not seen in each membrane module.

<Leak inspection method>
Air was introduced into the housing and pressurized to 0.3 MPa from the outer surface side of the hollow fiber membrane, and it was observed whether air appeared at the end face of the module. When peeling occurs on the inner surface or the like of the header member and the peeling portion penetrates from the inside to the outside of the fixed portion, air leaks from the peeling portion.

(Example 10)
A thermal cycle test was conducted in the same manner as in Example 9 except that the membrane module produced in the same manner as in Example 7 was used.
When leak inspection was performed every 100 cycles in the same manner as in Example 9, there was no leak up to 1000 cycles. Next, when the hollow fiber membrane module was taken out from the housing and the header portion was observed, peeling occurred in the vicinity of the contact surface between the protective member and the header member at the step portion of the header member.
Further, a cooling / heating cycle was performed in the same manner as in Example 9 except that the process of passing pure water cooled to 5 ° C. for 2 hours and the process of passing pure water heated to 40 ° C. for 2 hours were repeated. A test was conducted.
When a leak test was performed every 100 cycles, there was no leak up to 1000 cycles. Next, when the header portion was observed in the same manner as described above, there was no change and no peeling was observed before the thermal cycle test.

(Example 11)
A thermal cycle test was conducted in the same manner as in Example 9 except that the membrane module produced in the same manner as in Example 8 was used.
When leak inspection was performed every 100 cycles in the same manner as in Example 9, there was no leak up to 1000 cycles. Subsequently, when the hollow fiber membrane module was taken out from the housing and the header portion was observed, a slight gap (peeled portion) was observed at the interface of the bonded portion of the inlet side tubular portion of the header member. The peeled portion stopped at the stepped portion. This separation is presumed to be caused by a bubble portion staying in a square groove provided in the inlet side cylinder part, and progressing from the inlet end of the inlet side cylinder part to the step part.
Further, a cooling / heating cycle was performed in the same manner as in Example 9 except that the process of passing pure water cooled to 5 ° C. for 2 hours and the process of passing pure water heated to 40 ° C. for 2 hours were repeated. When tested, there was no leak. Moreover, when the header part was observed, there was no change and the peeling was not seen before the heat cycle test.

(Comparative Example 3)
A membrane module similar to Comparative Example 2 was produced. The membrane module did not show any peeling at the stage immediately after production. However, bubbles remained in the square groove provided in the inlet side cylinder.
A thermal cycle test was conducted in the same manner as in Example 9 except that this membrane module was used.
When leak inspection was performed every 100 cycles in the same manner as in Example 9, there was no leak after 100 cycles, but leak occurred after 200 cycles.
Next, when the hollow fiber membrane module was taken out from the housing and the header portion was observed, a gap (peeled portion) was continuously observed from the bonded portion interface of the inlet side tubular portion of the header member to the cut end surface of the end portion tubular portion. It was done. This separation is presumed to be caused by the part of the bubbles staying in the square groove provided in the inlet side cylinder part, and progressing from the inlet end to the cut end face of the inlet side cylinder part.
Further, a cooling / heating cycle was performed in the same manner as in Example 9 except that the process of passing pure water cooled to 5 ° C. for 2 hours and the process of passing pure water heated to 40 ° C. for 2 hours were repeated. When the test was performed, there was no leak until after 500 cycles, but leak occurred after 600 cycles.

As described above, the membrane module that does not leak after repeating the process of passing pure water cooled to 5 ° C. for 2 hours and the process of passing pure water heated to 80 ° C. for 2 hours is repeated 1000 cycles. However, no leak occurs. On the other hand, as in Comparative Example 3, leakage occurs in less than 200 cycles in the cooling cycle even if no peeling is observed immediately after manufacture. From this, the membrane module which does not leak after 200 cycles in the above-mentioned cooling / heating cycle test can be used without any problem in practice.

(Example 12)
Hereinafter, the results of a cooling / heating cycle test under high pressure will be shown.
Membrane modules were produced in the same manner as in Examples 1 to 4 except that the porous hollow fiber membrane of Production Example 2 was used. Immediately after production, no peeling was observed in each membrane module.
Subsequently, a cooling cycle test was conducted in the same manner as in Example 9 except that the pressure at the inlet was set to 0.5 MPa and the pressure at the permeate side outlet was set to 0.3 MPa. A leak test was performed every 100 cycles in the same manner as in Example 9. As a result, each membrane module had no leak up to 1000 cycles. Moreover, when the hollow fiber membrane module was taken out from the housing and the header part was observed in detail, peeling was not seen in each membrane module.
As described above, it can be used without causing peeling even under severe conditions such as high pressure and repeated low and high temperature processes as exposed in filtration of brewed beverages.

DESCRIPTION OF SYMBOLS 1 ... Cartridge module (membrane module), 1a ... Header part, 6 ... Module end surface, 7 ... Hollow fiber membrane bundle, 7a ... Hollow fiber membrane, 9 ... Header member, 21 ... Inlet side cylinder part, 21a ... Shallow groove, 23 ... End side cylinder part, 23a ... Deep groove, 23b ... Shallow groove, 23c ... 1st convex part, 23d ... 2nd convex part, 11 ... Protection member, 11c ... Projection part, 15 ... Sealing part, H ... Through hole of protective member, L ... axis, S ... sealing material, r1 ... inner diameter of inlet side cylinder, r2 ... inner diameter of end side cylinder, St ... step.

Claims

In the header member attached to the end of the hollow fiber membrane bundle and fixed to the hollow fiber membrane bundle by filling and solidifying the sealing material inside,
An inlet side cylindrical portion provided on the inlet side into which the hollow fiber membrane bundle is inserted, and an end side provided with an inner diameter smaller than that of the inlet side cylindrical portion and closer to the end side than the inlet side cylindrical portion A cylindrical portion,
A step is formed between the inner surface of the inlet-side tube portion and the inner surface of the end-side tube portion, and the header member is formed on at least one inner surface of the inlet-side tube portion and the end-side tube portion. An annular groove is formed along the axis of the header member.
2. The header member according to claim 1, wherein the end side tube portion of the header member has a cylindrical body portion and a bottom portion integrally formed with the body portion.
The said groove | channel contains the shallow groove | channel formed in the said entrance side cylinder part, and the deep groove deeper than the said shallow groove while being formed in the said edge part side cylinder part. Header member.
The header member according to any one of claims 1 to 3, wherein an annular convex portion along an axis of the header member is formed on an inner surface of the end portion side cylindrical portion.
A cylindrical header portion formed using the header member according to any one of claims 1 to 4, a hollow fiber membrane bundle comprising a plurality of hollow fiber membranes inserted into the header portion, and the hollow A membrane module comprising: a sealing portion for fixing the yarn membrane bundle to the header portion; and a module end face in which the inside of the hollow fiber membrane is opened.
Further comprising a cylindrical protective member that annularly surrounds the hollow fiber membrane bundle and is fixed to the header portion by the sealing portion together with the hollow fiber membrane bundle;
The protective member is provided with a plurality of through-holes and a linear protrusion protruding in an axial direction of the protective member from an end fixed to the header portion. Item 6. The membrane module according to Item 5.
The protection member has a mesh shape and has a plurality of meshes that form the through-holes, and the protruding portions are formed so as to protrude from the plurality of meshes that are continuously connected to each other at the end of the protection member. The membrane module according to claim 6.
In the method for manufacturing a membrane module using the header member according to any one of claims 1 to 4,
Bundling a plurality of hollow fiber membranes to form a hollow fiber membrane bundle;
Attaching the header member to the end of the hollow fiber membrane bundle, and filling a liquid sealing material inside the header member;
A step of solidifying the sealing material filled in the header member to form a sealing portion;
After forming the sealing portion, together with the end portion of the hollow fiber membrane, a part of the end side of the header member and a part of the sealing portion are cut so that the inside of the plurality of hollow fiber membranes is Forming an open module end face, and a method for manufacturing a membrane module.