JP2015142886A - Cartridge type hollow fiber membrane module, molding tool for potting part of hollow fiber membrane cartridge, and method for producing cartridge type hollow fiber membrane module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cartridge type hollow fiber membrane module capable of preventing leak due to peeling of a potting agent and miscellaneous germs contamination even if applying a steam sterilization, and also to provide a molding tool for a potting part of a hollow fiber membrane cartridge and a method for producing the cartridge type hollow fiber membrane module.SOLUTION: A cartridge type hollow fiber membrane module comprises: a housing; a hollow fiber membrane cartridge comprising a hollow fiber membrane bundle having a plurality of hollow fiber membranes, a potting part comprising a potting agent bonding the hollow fiber membranes so that the hollow fiber membranes open in at least one end of the hollow fiber membrane bundle, and a bonded portion of the hollow fiber membrane; and a first sealing material fixing the potting part liquid-tightly to the housing. The potting part has a first sealing surface in contact with the first sealing material. The first sealing surface is molded by the potting agent, and an arithmetic average roughness Ra of that surface is 1.6 μm or less.

Description

  The present invention relates to a cartridge-type hollow fiber membrane module used in a water treatment field, a fermentation industry field, a pharmaceutical manufacturing field, a food industry field, and the like, and a jig for potting part molding of the cartridge-type hollow fiber membrane module.

  Fermentation methods, which are substance production methods involving the cultivation of microorganisms and cultured cells, are largely (1) batch fermentation methods (Batch fermentation methods) and fed-batch fermentation methods (Fed-Batch fermentation methods), and (2) continuous fermentation methods. Can be classified.

  In the continuous fermentation method of (2) above, microorganisms and cultured cells are filtered through a separation membrane, and chemicals are recovered from the filtrate, and at the same time, the microorganisms and cultured cells in the concentrated liquid are retained or refluxed in the fermentation broth. A method for maintaining a high concentration of microorganisms and cultured cells in the culture solution has been proposed.

  For example, in a continuous fermentation apparatus using a flat membrane made of an organic polymer as a separation membrane, a technique for continuous fermentation has been proposed (see Patent Document 1). However, the proposed technology is an inefficient technology because the effective membrane area with respect to the installation volume of the flat membrane unit is small and the cost merit for producing the target chemical product is not sufficient.

  In order to solve the above problems, a continuous fermentation technique in which a separation membrane used in a continuous fermentation apparatus is a hollow fiber membrane made of an organic polymer has been proposed (see Patent Document 2). In this technique, since the membrane area per unit volume can be increased in the membrane unit, the fermentation production efficiency is remarkably higher than the conventional continuous fermentation.

  Furthermore, in the production of chemical products by continuous fermentation, it is basically necessary to carry out the culture in a state in which contamination with contaminants is prevented. For example, when various bacteria are mixed from the separation membrane module when filtering the fermentation broth, the fermentation efficiency is lowered, and the production of chemical products cannot be performed efficiently due to foaming in the fermenter. Therefore, in order to prevent contamination with bacteria, it is necessary to sterilize the separation membrane module. Examples of general sterilization methods include dry heat sterilization, boiling sterilization, steam sterilization, ultraviolet sterilization, gamma ray sterilization, and gas sterilization. Steam sterilization (usually 121 ° C. for 20 minutes) is the most effective method for sterilizing large-scale fermenters, piping connected to the fermenters, and separation membrane modules.

  However, when a sterilization method using heat, such as steam sterilization, is applied to the sterilization of the hollow fiber membrane module, the potting agent used in the hollow fiber membrane module is peeled off from the housing by the heat load, and the raw water is fed to the filtrate side. Problems such as leaks and contamination may occur.

  In order to solve the above problems, if the potting part is fixed to the housing or the cylindrical case with a sealing material instead of bonding, leakage due to peeling of the potting agent and contamination with germs can be suppressed even when steam sterilization is applied. it can. Patent Document 3 discloses a module including a potting portion and a sealing material that fixes the potting portion to a housing.

JP 2007-252367 A JP 2008-237101A JP-A-62-262709

  However, the present inventors have found that when the fixing by adhesion is simply changed to the fixing by the sealing material as in Patent Document 3, a leak is likely to occur between the potting portion and the housing.

  The present invention has been made in view of the above, and even if a sterilization method using heat, such as steam sterilization, is applied to sterilization of a hollow fiber membrane module, the potting agent used in the hollow fiber membrane module is heated. It is an object to provide a cartridge-type hollow fiber membrane module that peels off from a casing or a cylindrical case by a load and hardly causes problems such as leakage to the raw water filtrate and bacteria contamination and a potting part molding jig thereof. To do.

  In order to solve the above-described problems, the present invention provides the following techniques (1) to (10).

(1) with the housing;
A hollow fiber membrane bundle having a plurality of hollow fiber membranes, a potting agent for adhering the hollow fiber membranes so that the hollow fiber membranes are open at at least one end of the hollow fiber membrane bundle, and the hollow A potting portion comprising a bonded portion of the yarn membrane, and a hollow fiber membrane cartridge comprising:
A first sealing material for liquid-tightly fixing the potting portion to the housing;
With
The potting part has a first seal surface in contact with the first seal material,
The cartridge-type hollow fiber membrane module, wherein the first seal surface is molded with the potting agent, and the arithmetic average roughness Ra of the first seal surface is 1.6 μm or less.

(2) with the housing;
A cylindrical case housed in a housing;
A hollow fiber membrane bundle having a plurality of hollow fiber membranes, a potting agent for adhering the hollow fiber membranes so that the hollow fiber membranes are open at at least one end of the hollow fiber membrane bundle, and the hollow A potting portion comprising a bonded portion of the yarn membrane, and a hollow fiber membrane cartridge comprising:
A first sealing material for liquid-tightly fixing the potting portion to the cylindrical case;
With
The potting portion has a seal first surface in contact with the first seal material,
The cartridge-type hollow fiber membrane module, wherein the first seal surface is molded with the potting agent, and the arithmetic average roughness Ra of the first seal surface is 1.6 μm or less.

(3) The casing includes a cylindrical casing main body and an upper cap attached to a first end in the height direction of the casing main body.
The cartridge-type hollow fiber membrane module further includes a second sealing material that fixes the end of the potting portion on the filtrate side in a liquid-tight manner with the upper cap,
The potting portion has a second seal surface in contact with the second seal material,
The cartridge according to (1) or (2), wherein the second seal surface is molded with the potting agent, and the arithmetic average roughness Ra of the second seal surface is 1.6 μm or less. Type hollow fiber membrane module.

(4) The cartridge type hollow fiber membrane module according to any one of (1) to (3), wherein the potting agent contains an epoxy resin or a polyurethane resin.

(5) The potting portion includes a potting portion main body for bonding the hollow fiber membranes, and a protective potting layer provided on a surface of the potting portion main body on which the hollow fiber membrane extends.
The cartridge type hollow fiber membrane module according to any one of (1) to (4) above, wherein an elongation of the potting agent for forming the protective potting layer is 30% or more.

  (6) The cartridge type hollow fiber membrane module according to any one of (1) to (5) above, wherein the hollow fiber membrane is a hollow fiber membrane made of a fluorine resin or a polysulfone resin.

(7) A jig for molding the potting part of the cartridge type hollow fiber membrane module according to any one of (1) to (6),
A surface for forming the first seal surface;
The potting portion forming jig, wherein an arithmetic mean roughness Ra of a surface on which the first seal surface is formed is 1.6 μm or less.

(8) Furthermore, the surface which shape | molds the said 2nd sealing surface is provided,
An arithmetic mean roughness Ra of a surface for shaping the second seal surface is 1.6 μm or less.

(9) A method for producing a hollow fiber membrane cartridge in the hollow fiber membrane cartridge module according to any one of (1) to (6) above,
The following steps (a) and (b):
(A) disposing the jig described in (7 or 8 above) so as to surround at least one end of a hollow fiber membrane bundle having a plurality of hollow fiber membranes;
(B) a potting agent that bonds between the hollow fiber membranes by curing the potting agent in the jig and covers the side surface of the hollow fiber membrane bundle; and a hollow fiber membrane that is bonded with the potting agent; Forming a potting part having
(10) The following step (c):
(C) The potting portion further comprises forming a protective potting layer having an elongation after curing of 30% or more on a surface on which the hollow fiber membrane extends in the potting portion. Manufacturing method of hollow fiber membrane cartridge.

  The cartridge type hollow fiber membrane module of the present invention has a structure in which a potting part composed of a potting agent and a part of the hollow fiber membrane bonded to each other with the potting agent, and a casing or a cylindrical case are fixed with a sealing material. It is said. Since the potting agent is not bonded to the case or cylindrical case, the adhesive part between the potting agent and the case or cylindrical case does not peel off due to heat load such as steam sterilization unlike conventional modules. In addition, leakage of raw water and contamination with germs can be prevented. Here, since the sealing surface where the potting portion is in contact with the sealing material is smooth, it is possible to follow the rubber to the sealing surface of the sealing material and fix it in a liquid-tight and air-tight manner. Therefore, the cartridge-type hollow fiber membrane module of the present invention is used in the fermentation industry field, the pharmaceutical manufacturing field, the food industry field, the water treatment field, etc. that require steam sterilization or hot water sterilization to prevent leakage of raw water or contamination of bacteria. can do. In particular, by using the cartridge-type hollow fiber membrane module of the present invention, continuous fermentation that stably maintains high productivity over a long period of time is possible, and in the fermentation industry, chemical products that are fermentation products can be produced at low cost. It becomes possible to produce stably.

FIG. 1 is a schematic longitudinal sectional view of a cartridge type hollow fiber membrane module according to the first embodiment of the present invention. FIG. 2 is a schematic longitudinal sectional view of the hollow fiber membrane cartridge of the module of FIG. FIG. 3 is an enlarged view of a first potting portion of the module of FIG. 4 is a cross-sectional view taken along line BB in FIG. 5 is a cross-sectional view taken along line AA in FIG. FIG. 6 is a schematic diagram illustrating an example of a first potting part forming jig of the hollow fiber membrane module. FIG. 7 is a flowchart showing an example of a manufacturing method of the cartridge type hollow fiber membrane module. FIG. 8 is a schematic view illustrating an example of a method for producing a hollow fiber membrane module. FIG. 9 is an enlarged view before cutting of the first potting portion of the hollow fiber membrane module. FIG. 10 is a schematic longitudinal sectional view of the vicinity of the first potting portion of the cartridge type hollow fiber membrane module according to the second embodiment of the present invention. FIG. 11 is a schematic longitudinal sectional view of the vicinity of the first potting portion of the cartridge type hollow fiber membrane module according to the third embodiment of the present invention. FIG. 12 is a schematic diagram illustrating an example of a first potting part forming jig according to the third embodiment of the present invention.

  Below, the cartridge type hollow fiber membrane module form of this invention is demonstrated in detail based on drawing. In the cartridge-type hollow fiber membrane module of the present invention, “upper” and “lower” are based on the state shown in the drawings and are for convenience. The side where the filtrate flows out is the “up” direction. Usually, in the posture when the hollow fiber membrane module is used, the vertical direction coincides with the vertical direction in the drawing.

(First embodiment)
The configuration of the cartridge type hollow fiber membrane module according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic longitudinal sectional view of a cartridge type hollow fiber membrane module according to the first embodiment of the present invention.

  The cartridge-type hollow fiber membrane module according to the first embodiment includes a housing, a plurality of hollow fiber membranes housed in the housing, and a first potting bundled in a state where a first end of the hollow fiber membrane is opened. Part (potting part), a second potting part bundled in a state where the second end part of the hollow fiber membrane is sealed, and a sealing material for sealing between the first potting part and the housing in a liquid-tight manner And.

<Module structure>
As shown in FIG. 1, the hollow fiber membrane module 101A includes a housing and a hollow fiber membrane cartridge 100 shown in FIG. 2 housed in the housing.

  The housing includes a hollow housing body 3 and upper and lower caps 4 and 5 provided at both ends of the housing body 3.

  As shown in FIG. 1, an upper cap 4 having a filtrate outlet 7 is provided at the upper part of the casing body 3, and a lower cap 5 having a raw water inlet 6 is provided at the lower part of the casing body 3. It is connected tightly and airtightly. The upper cap 4 and the lower cap 5 use a gasket 17 as shown in FIG. 1, for example, and are fixed to the housing body 3 with a clamp or the like.

  The housing body 3 has flanges 3A and 3B at the upper and lower ends thereof over the entire circumference of the housing body 3. A raw water outlet 8 is provided near the filtrate outlet 7 on the side of the housing body 3.

  The upper cap 4 has an inner diameter substantially equal to the inner diameter of the housing body 3, and the upper end side thereof is reduced in diameter to form the filtrate outlet 7. On the lower end side of the upper cap 4, a step portion 4 </ b> A for forming a groove when connected to the housing body 3 is formed over the entire circumference of the upper cap 4. When the housing body 3 and the upper cap 4 are connected, the lower end portion of the upper cap 4 comes into contact with the flange portion 3A of the housing body 3 to form a groove (fixed portion), and this groove (fixed portion) will be described later. The collar portion 11C of the first potting portion 11 is fixed.

  The lower cap 5 has an inner diameter substantially equal to the inner diameter of the housing body 3, and the lower end side thereof is reduced in diameter to form the raw water inlet 6.

<Cartridge>
As shown in FIG. 2, the hollow fiber membrane cartridge 100 includes a hollow fiber membrane bundle 2 including a plurality of hollow fiber membranes 1 and a potting portion that bonds the hollow fiber membranes 1 at the end of the hollow fiber membrane bundle 2. Prepare. Specifically, a potting part consists of a potting agent and the part mutually adhere | attached with the potting agent among hollow fiber membranes. As a potting unit, the hollow fiber membrane cartridge 100 includes a first potting unit 11 disposed on the filtrate outlet 7 side of the casing and a second potting unit 12 disposed on the raw water inlet 6 side of the casing. .

<First potting part>
The first potting portion 11 disposed on the filtrate outlet 7 side of the housing, that is, the upper end side of the hollow fiber membrane cartridge 100, is a potting that bonds the hollow fiber membranes 1 at the first end of the hollow fiber membrane bundle 2. A potting portion main body 11A formed with a potting agent and a hollow fiber membrane bonded to the potting agent.

  Here, the hollow fiber membrane bundle 2 is bundled with the upper end surface of the hollow fiber membrane 1 being opened. The first potting portion 11 has a cylindrical shape, and a flange portion 11 </ b> C is provided at the upper end portion of the first potting portion 11 over the entire circumference of the first potting portion 11. Further, a step portion 11 </ b> D is provided on the side surface of the first potting portion 11 over the entire circumference. By providing the step part 11D, the outer diameter of the upper part of the first potting part 11 is larger than the outer diameter of the lower part.

  The flange portion 11 </ b> C of the first potting portion 11 is inserted into a groove (fixed portion) formed between the housing main body 3 and the upper cap 4 by attaching the upper cap 4 to the housing main body 3. In this way, the first potting portion 11 is fixed to the upper end portion of the housing body 3.

  A first sealing material is provided between the step portion 11 </ b> D of the first potting portion and the housing body 3. The first sealing material fixes the first potting portion in a liquid-tight and air-tight manner. In FIG. 1 etc., O-ring 15 is shown as a 1st sealing material. The O-ring 15 is crushed in the radial direction of the hollow fiber membrane module (lateral direction in FIG. 1), thereby fixing the first potting portion 11 in a liquid-tight and air-tight manner. In order to ensure sealing performance, the crushing allowance of the O-ring 15 is preferably 8% or more and 30% or less.

  As described above, the first potting portion 11 is not directly bonded to the housing body 3 but is fixed in a liquid-tight and air-tight manner to the housing body 3 by a sealing material such as an O-ring 15. Therefore, unlike the conventional hollow fiber membrane module, the casing and the potting agent are peeled off by heat treatment, and problems such as leakage to the filtrate side of raw water and contamination with bacteria do not occur.

  In the first potting portion, a portion in contact with the sealing material is referred to as a sealing surface. Here, the surface of the stepped portion 11D is the sealing surface.

  In order to fix the first potting portion 11 in a liquid-tight and air-tight manner with the O-ring 15, it is necessary to obtain a step 11D, that is, a rubber follow-up (biting) on the seal surface, and the arithmetic average roughness Ra of the seal surface is 1.6 μm. It is necessary to do the following. When the surface is rougher than this range, the rubber is not sufficiently followed by the seal surface, and there is a high possibility that problems such as leakage to the raw water and contamination of germs will occur. Further, when the surface is rougher than this range, the frictional resistance applied to the O-ring is increased, so that the possibility of damage to the O-ring is high and the usable life may be shortened. When the frictional resistance applied to the O-ring is large, the operability for installing the hollow fiber membrane cartridge 100 may be deteriorated.

  The kind of potting agent of the cartridge type hollow fiber membrane module is not particularly limited as long as it satisfies the adhesive strength with the member to be bonded, heat resistance, chemical durability, and the like. For example, the potting agent can contain an epoxy resin or a polyurethane resin as a main component. Many epoxy resins and polyurethane resins are excellent in adhesiveness to a hollow fiber membrane, heat resistance, and chemical durability, and can be suitably used as a potting agent for the cartridge type hollow fiber membrane module of this embodiment. it can. The potting agent may contain additives other than adhesives such as silica, glass, rubber, etc., and the additive to the potting agent used for various purposes is irrelevant to the present invention.

<Second potting part>
A second potting portion 12 that is the lower end side of the hollow fiber membrane cartridge 100 is disposed on the raw water inlet 6 side of the casing. The second potting portion 12 where the second end portion of the hollow fiber membrane 1 is located is configured by adhering a hollow fiber membrane bundle 2 composed of a number of hollow fiber membranes 1 and a second potting portion case 13 with a potting agent. Yes. Here, the hollow part of the hollow fiber membrane 1 is sealed with a potting agent and is not open. The second potting portion case 13 has a cylindrical shape having a bottom portion below, and has an outer diameter smaller than the inner diameter of the housing body 3. Moreover, the 2nd potting part 12 has the through-hole 14, and has played the role of the flow path of raw | natural water.

  The type of potting agent used in the second potting part of the cartridge type hollow fiber membrane module is not particularly limited as long as it satisfies the adhesive strength, heat resistance, chemical durability, etc. with the member to be bonded. For example, epoxy resin or polyurethane resin Etc. can be used.

<Hollow fiber membrane>
The cartridge type hollow fiber membrane module of this embodiment includes a hollow fiber membrane as a separation membrane. A hollow fiber membrane is advantageous because it generally has a specific surface area larger than that of a flat membrane and a larger amount of liquid can be filtered per unit time. The structure of the hollow fiber membrane is a symmetric membrane with a uniform pore size as a whole, an asymmetric membrane whose pore size changes in the thickness direction of the membrane, and a separation function for separating the support layer and the target substance to maintain strength There are composite membranes having layers.

  The average pore diameter of the hollow fiber membrane may be appropriately selected depending on the separation target, but is preferably 10 nm or more and 220 nm or less for the purpose of separation of microorganisms such as bacteria and fungi and animal cells. If the average pore size is less than 10 nm, the water permeability becomes low, and if it exceeds 220 nm, microorganisms and the like may leak. The average pore size in the present invention is the pore size of the dense layer having the smallest pore size.

  The material of the separation membrane is not particularly limited. Examples of the separation membrane include polytetrafluoroethylene, polyvinylidene fluoride, polyvinyl fluoride, ethylene tetrafluoride / hexafluoropropylene copolymer, and ethylene / tetrafluoroethylene copolymer. Fluorine resins such as cellulose acetate, cellulose acetate propionate, cellulose esters such as cellulose acetate butyrate, polysulfone resins such as polysulfone and polyethersulfone, resins such as polyacrylonitrile, polyimide, and polypropylene can be contained. . In particular, a separation membrane made of a fluorine resin or a polysulfone resin has high heat resistance, physical strength, and chemical durability, and therefore can be suitably used for a cartridge type hollow fiber membrane module.

  The hollow fiber membrane may further contain a hydrophilic resin in addition to the fluorine-based resin or the polysulfone-based resin. With the hydrophilic resin, the hydrophilicity of the separation membrane can be increased and the water permeability of the membrane can be improved. The hydrophilic resin may be any resin that can impart hydrophilicity to the separation membrane, and is not limited to a specific compound. For example, cellulose ester, fatty acid vinyl ester, vinyl pyrrolidone, ethylene oxide, Propylene oxide, polymethacrylic acid ester resin, polyacrylic acid ester resin and the like are preferably used.

  When producing a hollow fiber membrane cartridge, the potting part forming jig is filled with the hollow fiber membrane and fixed with a potting agent. However, the hollow fiber membrane is dried in advance for handling and adhesion problems. However, most of the hollow fiber membranes have a problem that shrinkage occurs due to drying and water permeability is lowered. Therefore, a hollow fiber membrane is used after being dipped in an aqueous glycerin solution. When dried after immersing in an aqueous glycerin solution, glycerin remains in the pores, so that shrinkage due to drying can be prevented, and water permeability can be restored by performing immersion treatment with a solvent such as ethanol after that. .

  The cartridge-type hollow fiber membrane module can be used after steam sterilization, but some types of hollow fiber membranes contract due to steam sterilization. Therefore, when steam sterilization is performed after the module is manufactured, the hollow fiber membrane may be damaged due to shrinkage of the hollow fiber membrane, or the hollow fiber membrane may be peeled off from the potting agent. Therefore, it is desirable to produce a module by steaming the hollow fiber membrane in advance and shrinking it before potting. Since steam sterilization is generally performed at 121 ° C. or higher, it is desirable to perform pretreatment with steam at 121 ° C. or higher.

<Seal material>
The material of the sealing material such as an O-ring or gasket used in the cartridge type hollow fiber membrane module is not particularly limited as long as it satisfies heat resistance and chemical durability. For example, fluorine rubber, silicone rubber, ethylene propylene diene rubber (EPDM) Etc. can be used.

<Material of casing and cylindrical case>
The material of the housing used in the cartridge type hollow fiber membrane module is not particularly limited as long as it satisfies heat resistance, chemical durability, etc., for example, fluorine resin such as polysulfone resin, polytetrafluoroethylene, perfluoroalkoxy fluorine resin, Examples thereof include polycarbonate, polypropylene, polymethylpentene, polyphenylene sulfide, polyether ketone, stainless steel, and aluminum. The material of the cylindrical case and the second potting part case used in the cartridge type hollow fiber membrane module is not particularly limited, but can be selected from, for example, the same material as that of the housing.

<Method for producing hollow fiber membrane cartridge>
Below, the manufacturing method of the hollow fiber membrane cartridge in the cartridge type hollow fiber membrane module concerning 1st Embodiment is demonstrated. In addition, the manufacturing method described here is not limited to 1st Embodiment, A hollow fiber membrane cartridge can be manufactured with the same method also in any embodiment mentioned later.

  As the potting method, centrifugal potting method in which liquid potting agent is infiltrated between hollow fiber membranes using centrifugal force and then hardened, and liquid potting agent is fed by a metering pump or head and allowed to flow naturally. Any of the stationary potting methods in which the hollow fiber membrane 1 is allowed to penetrate and then cured can be used.

  In the centrifugal potting method, the potting agent easily penetrates between the hollow fiber membranes by centrifugal force, and a highly viscous potting agent can also be used. When using a polyurethane resin as a potting agent for adhering the hollow fiber membrane 1, the moisture contained in the hollow fiber membrane 1 reacts with isocyanate to generate carbon dioxide and foam, so the polyurethane resin is used in the stationary potting method. Difficult to do. If the centrifugal potting method is used, pressure is generated in the direction of the end of the module due to centrifugal force, and air bubbles escape in the inner direction. Therefore, polyurethane resin can be used as a potting agent for adhering the hollow fiber membrane 1. On the other hand, stationary potting does not require large equipment such as a centrifugal molding machine.

  When the potting is finished and the potting agent is cured, the end surface of the hollow fiber membrane 1 is opened by cutting the potting portion on the end side of the first potting portion. Before potting, it is desirable to carry out a sealing process for sealing the hollow portion at the end of the hollow fiber membrane 1 with a silicone adhesive or the like. When the sealing treatment is performed, it is possible to prevent the potting agent from further entering the hollow portion, and to prevent the occurrence of thread breakage in which the hollow portion is filled with the potting agent and the permeate does not come out.

  Further, when potting is performed, the inner surface of the second potting part case 13 may be filed, plasma treatment, primer treatment, or the like may be performed in order to improve adhesion.

  Next, the manufacturing method of the hollow fiber membrane cartridge 100 concerning 1st Embodiment is demonstrated with reference to the flowchart of FIG. However, the manufacturing method described below can be applied to a cartridge in a module according to any of the embodiments described later.

  First, the hollow fiber membrane bundle 2 is installed in the centrifugal potting apparatus shown in FIG. 8, and centrifugal potting is performed to form the first potting portion and the second potting portion (step S1).

  Here, the center portion of the hollow fiber membrane bundle 2 is housed in a cylindrical case 20 made of polyvinyl chloride, and the first end of the hollow fiber membrane 1 is placed on the first potting portion forming jigs 21A and 21B. The second end portion is inserted into the second potting portion case 13, respectively. Further, a pin 23 is inserted into a through hole at the bottom of the second potting part case 13, and the second potting part case 13 and the pin 23 are accommodated in the second potting part forming jig 22. The first end portion of the hollow fiber membrane 1 is preliminarily treated with a silicone adhesive.

  A potting agent feeder 19 is connected to the PVC cylindrical case 20, and the potting agent forming jigs 21A and 21B and the second potting are turned by centrifugal force by rotating the entire apparatus in a centrifugal molding machine. It can be supplied to the part case 13. The potting agent can be supplied simultaneously to the potting part forming jigs 21A, 21B and the second potting part case 13, or can be supplied separately.

  After the potting agent has hardened, remove the potting part forming jig. Since the time and temperature required for curing vary depending on the type of potting agent, suitable conditions may be applied as appropriate.

  As a method for smoothing the surface of the sealing surface, there are a method in which the sealing surface is post-processed by polishing after molding the potting portion, and a method in which a smooth sealing surface is formed at the time of molding the potting portion.

  In the method of post-processing such as polishing the sealing surface after forming the potting portion, a post-processing step is required every time the hollow fiber membrane cartridge is manufactured. Further, the post-treatment process is not efficient because the operation becomes complicated. In addition, there is a high possibility that the surface roughness of the seal surface varies from one hollow fiber membrane cartridge to another, and it is difficult to manufacture a hollow fiber membrane cartridge having a certain quality.

  In particular, when a potting part is molded, if a means for smooth molding of the sealing surface is taken, a smoothing step by post-processing is not required every time the hollow fiber membrane cartridge is manufactured, and the production efficiency is high and the quality is improved. Easy to keep. In the present invention, by using a potting part forming jig provided with a means for smoothing the seal surface, which will be described later, it is possible to form a seal surface that can be reliably sealed with an O-ring.

  Finally, the C-C line portion of FIG. 9 is cut with a tip saw type rotary blade, and the hollow fiber membrane cartridge 100 can be manufactured by opening the first end portion of the hollow fiber membrane 1 (step S2).

  Moreover, you may perform the process of providing the protective potting layer 11B after step S1, like manufacture of the hollow fiber membrane module of 2nd Embodiment mentioned later. The step of providing the protective potting layer is a step of placing a liquid potting agent having an elongation after curing of 30% or more on the surface where the hollow fiber membrane extends in the first potting portion.

<Potting part forming jig>
The potting part forming jig of the present invention will be described with reference to the drawings. FIG. 6 is a schematic longitudinal sectional view of the first potting part forming jig according to the first embodiment of the present invention. As described above, in a part of the present invention, means for smoothing the sealing surface is provided in the potting part forming jig. The surface roughness of the potting part is affected by the surface roughness and mold release properties of the potting part forming jig for forming the surface. In order to form a smooth surface, a potting part forming jig having a smooth surface and good releasability may be used. When the surface of the potting part forming jig is rough and the releasability is good, the rough surface of the forming jig is transferred to the surface of the potting part to be formed. On the contrary, the surface of the potting part forming jig is smooth, but when the releasability is poor, the smooth surface of the forming jig is not transferred as it is, and a smooth potting part surface cannot be obtained.
As described above, the surface roughness required for the sealing surface in the potting part is desirably an arithmetic average roughness Ra of 1.6 μm or less. Accordingly, it is desirable that the surface roughness of the seal surface molding portion of the potting portion molding jig is at least an arithmetic average roughness Ra of 1.6 μm or less. The surface roughness of the potting part and the potting part molding jig of the hollow fiber membrane module can be measured using a commercially available surface roughness meter. If it has a correction function such as R-plane correction, it may be measured by scanning the detector in the circumferential direction of the hollow fiber membrane module. The measurement may be performed by scanning the detector.

  In order to smooth the surface of the potting part forming jig, it is preferable that the surface is polished stepwise with a fine abrasive after being polished with a rough abrasive. Specifically, it is preferable to polish the surface obtained by the cutting process while changing the surface of the abrasive material from small to large. For example, the surface can be sufficiently smoothed by performing buffing in the order of counts 400, 600, and 800 on the surface obtained by milling.

  In order to improve the releasability of the sealing surface forming part of the potting part forming jig, a method of suppressing the releasing resistance by smoothing the surface of the sealing surface forming part, a method of performing coating such as PTFE, or a releasing A method using a mold is mentioned.

  In order to improve releasability, it is particularly preferable to use a potting part forming jig having a smooth surface. According to this method, the releasability can be maintained longer than the coating process. In addition, when a release agent is applied, it is necessary to apply the release agent every time the hollow fiber membrane cartridge is manufactured. However, a smooth jig does not require such an application step, so that productivity is improved. .

  The material of the potting part molding jig is not particularly limited as long as it satisfies heat resistance and chemical durability. For example, vinyl chloride resin, nylon resin, fluorine resin, polypropylene resin, polyacetal resin, polyethylene resin Silicone resins are excellent in releasability and are preferably used. The potting part forming jig may be made of a single material or a combination of a plurality of materials so as to include at least one material as described above.

<Manufacture of hollow fiber membrane module>
The hollow fiber membrane module 100A according to the first embodiment is inserted by inserting the hollow fiber membrane cartridge 100 manufactured by the above method into the housing body 3 and fixing it with the O-ring 15, and attaching the upper cap 4 and the lower cap 5. Can be manufactured. In addition, the manufacturing method described here is not limited to 1st Embodiment, In any embodiment mentioned later, a cartridge type hollow fiber membrane module can be manufactured with the same method.

(Second Embodiment)
The configuration of the cartridge type hollow fiber membrane module according to the second embodiment of the present invention will be described with reference to the drawings. FIG. 10 is a schematic longitudinal sectional view of the vicinity of the first potting portion of the cartridge type hollow fiber membrane module 101B according to the second embodiment. In addition, about the structure of the cartridge type hollow fiber membrane module 101B which is not mentioned below, the structure similar to the cartridge type hollow fiber membrane module 101A of 1st Embodiment is applicable. Members having the same functions as those described in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

  In the cartridge type hollow fiber membrane module 101B according to the second embodiment, the first potting part 112 is further provided with a protective potting part 11B in addition to the potting part main body 11A, and the cartridge type hollow fiber according to the first embodiment. The structure is the same as that of the membrane module 101A. The protective potting portion 11B is provided on the lower surface of the potting portion main body 11A. That is, the protective potting portion 11B is provided on the surface of the first potting portion 112 that faces the second potting portion 12, that is, the surface on which the hollow fiber membrane extends in the first potting portion 112.

  In general, in the module, due to the flow of raw water, a large burden is imposed on the hollow fiber membrane due to contact with the potting portion at the end surface of the potting portion, and the hollow fiber membrane is easily broken at this portion.

  On the other hand, in this embodiment, the 1st potting part 112 is provided with the protection potting part 11B shape | molded with the potting agent with a large elongation. When the hollow fiber membrane 1 swings due to the flow of liquid or air scrubbing, the protective potting portion 11B expands to follow the movement of the hollow fiber membrane 1, whereby the burden on the hollow fiber membrane 1 can be reduced. Thus, the protective potting portion 11B reduces the burden on the hollow fiber membrane 1 due to contact between the hollow fiber membrane 1 and the first potting portion 112 on the lower surface of the first potting portion 112, and suppresses breakage of the hollow fiber membrane 1. be able to.

  As a potting agent for forming the protective potting portion 11B, a potting agent having sufficient heat resistance, preferably having an elongation of 30% or more, and more preferably having an elongation of 50% or more is used. preferable. For example, an epoxy resin, a polyurethane resin, or a silicone resin can be used as the protective potting portion 11B. Further, the elongation of the protective potting part 11B is preferably larger than the elongation of the first potting part main body 11A. The elongation of the potting agent may be evaluated based on JIS K 6251 (2004).

(Third embodiment)
A configuration of a cartridge type hollow fiber membrane module 101C according to the third embodiment of the present invention will be described with reference to the drawings.

  FIG. 11 is a schematic longitudinal sectional view of the vicinity of the first potting portion of the cartridge type hollow fiber membrane module 101C according to the third embodiment. About the structure of the cartridge type hollow fiber membrane module 101C which is not mentioned below, the structure similar to the cartridge type hollow fiber membrane module 101A of 1st Embodiment is applicable. Members having the same functions as those described in the first embodiment are given the same reference numerals, and descriptions thereof are omitted.

  A cartridge-type hollow fiber membrane module 101C according to the third embodiment has substantially the same configuration as the module 101A of the first embodiment except that it includes a cylindrical case 9.

  The cylindrical case 9 is a substantially cylindrical member, and is accommodated in the housing body 3 such that the height direction of the cylindrical shape is along the height direction of the housing body 3. On the outer surface of the cylindrical case 9, a flange portion 9A and a step portion 9B are provided. The flange portion 9 </ b> A is a portion that protrudes outward in the radial direction and is provided at the upper end of the cylindrical case 9 so as to go around the outer peripheral surface of the cylindrical case 9. The step portion 9B is also provided so as to go around the outer peripheral surface of the cylindrical case 9. By providing the step 9B, the outer diameter of the upper part of the cylindrical case 9 is larger than the outer diameter of the lower part.

  A rectifying hole 10 is provided on the side surface of the cylindrical case 9 for the purpose of preventing the drift of the raw water during the filtration operation.

  The upper cap 4 further includes a step 4B provided below the step 4A. The step 4B is formed over the entire circumference of the upper cap 4 in the same manner as the step 4A. When the upper cap 4 is attached to the housing body 3, a groove is formed between the upper surface of the flange 3A of the housing body and the step portion 4B. The flange portion 9A of the cylindrical case 9 is fitted into this groove. That is, the cylindrical case 9 is fixed to the housing body 3 by the flange portion 9 </ b> A being sandwiched between the upper cap 4 and the housing body 3.

  The inner diameter of the cylindrical case 9 is smaller than the diameter of the step 4B of the upper cap 4. Therefore, a groove is formed between the upper surface of the cylindrical case 9 and the step 4A of the upper cap 4 in a state where the cylindrical case 9 is fixed to the housing body 3.

  The first potting portion 113 is accommodated in the cylindrical case 9. The flange portion 11 </ b> C of the first potting portion fits into a groove formed between the upper surface of the cylindrical case 9 and the step portion 4 </ b> A of the upper cap 4. Further, a groove portion 24 for accommodating the gasket 18 (second sealing material) is provided on the upper portion (filtrate side) of the first potting portion, and the gasket 18 is disposed in the groove portion 24. That is, the first potting portion 11 is fixed to the cylindrical case 9 and the housing 3 by the flange portion 11C being sandwiched between the upper cap 4 and the cylindrical case 9 via the gasket 18. The

  Here, the gasket 18 plays a role of isolating the bag space formed between the first potting portion 113, the upper cap 4, the cylindrical case 9, and the O-ring 15 from the filtrate side space. In such a bag space, the filtrate and steam drain during steam sterilization are likely to stay, so that the cleaning property is poor and sterilization failure is likely to occur. Therefore, in order to ensure the cleanability and sterilization of the module, it is preferable to isolate such a passage space with the gasket 18. The surface of the groove portion 24 of the first potting portion with which the gasket 18 is in contact with the surface needs to be smoothed for reliable sealing. It is desirable that the surface of the groove 24 has an arithmetic average roughness Ra of 1.6 μm or less.

  An O-ring 15 is installed between the step portion 11 </ b> D of the first potting portion 113 and the inner surface of the cylindrical case 9. The first potting portion 11 is fixed to the cylindrical case 9 in a liquid-tight and air-tight manner by the O-ring 15. Here, the O-ring 15 is crushed in the axial direction of the module between the cylindrical case 9 and the first potting portion 11 to fix the first potting portion in a liquid-tight and air-tight manner. The surface of the step portion 11D, which is the sealing surface of the first potting portion in contact with the O-ring 15, needs to be smoothed for reliable sealing, and at least the arithmetic average roughness Ra should be 1.6 μm or less. Is desirable.

  FIG. 12 shows a first potting part forming jig of the present invention used for manufacturing the hollow fiber membrane cartridge of the third embodiment. In the third embodiment, after removing the potting portion forming jig, the DD line portion is cut to open the first end of the hollow fiber membrane 1 (step S2), but the groove 24 smoothes the surface. Since the inner surface is formed by the potting part forming jig, it is possible to seal the upper part of the first potting part using the gasket 18 without including a smoothing step in the post-processing.

  An O-ring 16 is installed between the step 9B of the cylindrical case and the housing body 3. The cylindrical case 9 is fixed to the housing body 3 in a liquid-tight and air-tight manner by the O-ring 16.

  When the cartridge-type hollow fiber membrane module 101C is steam sterilized, if the lower part of the cylindrical case and the housing body 3 are in contact with each other, steam drain may accumulate and the temperature will not rise sufficiently, and sterilization failure may occur. There is. Therefore, in order to prevent the steam drain from staying, it is preferable to provide a clearance for discharging the steam drain between the lower portion of the cylindrical case and the housing body 3.

(Filtering operation method for cartridge type hollow fiber membrane module)
The filtration operation method of the cartridge type hollow fiber membrane module will be described. The raw water flows into the cartridge type hollow fiber membrane module 101A from the raw water inlet 6 of the lower cap 5, and the raw water that has not permeated through the hollow fiber membrane 1 is discharged from the raw water outlet 8 to the outside of the cartridge type hollow fiber membrane module 101A. Is done. The filtrate that permeates from the outside to the inside of the hollow fiber membrane 1 passes through the hollow portion of the hollow fiber membrane 1 and is discharged from the filtrate outlet 7 of the upper cap 4 to the outside of the cartridge type hollow fiber membrane module 101A.

  The method of filtering while flowing raw water in parallel with the membrane surface is called cross flow filtration, and has an effect of suppressing the accumulation of suspended substances in the raw water on the membrane surface. Moreover, if the raw | natural water exit 8 is closed, the whole quantity filtration which filters all raw | natural water can also be performed. In addition, air scrubbing can be performed by supplying air from the raw water inlet 6 to wash the hollow fiber membrane. The inflowing air is discharged from the raw water outlet 8. Moreover, the back pressure washing | cleaning of a hollow fiber membrane can also be performed by supplying a back pressure washing | cleaning liquid from the filtrate exit 7, and permeate | transmitting a liquid from the inner side to the outer side of a hollow fiber membrane.

  The present invention is not limited to the above-described embodiments, and can be appropriately modified and improved. In addition, the material, shape, dimension, numerical value, form, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

  Hereinafter, the present invention will be specifically described by way of examples, but the present invention is not limited thereto.

(A) Production of Hollow Fiber Membrane 38 parts by mass of vinylidene fluoride homopolymer having a weight average molecular weight of 41,000 and 62 parts by mass of γ-butyrolactone were mixed and dissolved at 160 ° C. The polymer solution was discharged from a double-tube base while an 85% by mass γ-butyrolactone aqueous solution was accompanied as a hollow portion forming liquid, and consisted of an 85% by mass aqueous γ-butyrolactone solution at a temperature of 20 ° C. placed 30 mm below the base. A hollow fiber membrane having a spherical structure was produced by solidifying in a cooling bath. Subsequently, 14 parts by mass of vinylidene fluoride homopolymer having a weight average molecular weight of 284,000, 1 part by mass of cellulose acetate propionate (manufactured by Eastman Chemical Co., CAP482-0.5), 77 parts by mass of N-methyl-2-pyrrolidone Part, 5 parts by mass of polyoxyethylene sorbitan fatty acid ester (manufactured by Sanyo Chemical Co., Ltd., Ionet (registered trademark) T-20C) and 3 parts by mass of water were mixed and dissolved at 95 ° C. to prepare a polymer solution. The membrane-forming stock solution was uniformly applied to the surface of a hollow fiber membrane having a spherical structure, and immediately solidified in a water bath to produce a hollow fiber membrane 1 having a three-dimensional stitch structure formed on the spherical structure layer. . The obtained hollow fiber membrane 1 had an outer diameter of 1350 μm, an inner diameter of 800 μm, and a membrane surface average pore diameter of 40 nm.

(B) Manufacture of modules (Example 1)
After milling the polyacetal-based resin, the surface was buffed to produce first potting part forming jigs 21A and 21B (inner diameter 140 mm) having an arithmetic average roughness Ra of 0.68 μm on the jig surface. Moreover, the 2nd potting part shaping | molding jig | tool 22 (inner diameter 140mm) was produced by milling polyacetal type resin.

  The hollow fiber membrane 1 obtained in the above (a) was cut to a length of 1800 mm, immersed in a 30% by mass glycerin aqueous solution for 1 hour, and then air-dried. The hollow fiber membrane 1 was heat-treated with steam at 125 ° C. for 1 hour, air-dried, and cut to a length of 1200 mm. Thereafter, both ends of the hollow fiber membrane 1 were spotted with a silicone adhesive (manufactured by Dow Corning Toray, SH850A / B, two components mixed in a mass ratio of 50:50).

  After that, as shown in FIG. 8, 5,000 hollow fiber membranes 1 described above were filled in a PVC cylindrical case 20 (inner diameter 145 mm, outer diameter 155 mm, length 1000 mm, split mold). Furthermore, the first potting part forming jigs 21A and 21B, the second potting part forming jig 22, and the polysulfone second potting part case 13 were mounted on both ends of the PVC cylindrical case 20. In this way, the cylindrical case 20 fitted with the jig was installed in a centrifugal molding machine. A pin 23 is inserted into the through hole at the bottom of the second potting part case 13, and the second potting part case 13 and the pin 23 are housed inside the second potting part forming jig 22.

  As a film bundle adhesive (potting agent), a mass ratio of bisphenol F type epoxy resin (manufactured by Huntsman, LST868-R14) and aliphatic amine curing agent (manufactured by Huntsman, LST868-H14) is 100: 30. A total of 2000 g (1000 g per one end) was put in the potting agent feeder 19.

  Subsequently, the centrifugal molding machine is rotated, and the potting agent is filled in the potting part forming jigs 21A and 21B and the second potting part case 13 at both ends to form the first potting part 11 and the second potting part 12, and potting is performed. The agent was cured. The temperature in the centrifugal molding machine was 35 ° C., the rotation speed was 350 rpm, and the centrifugation time was 5 hours.

  Thereafter, the potting portion forming jigs 21A, 21B, 22 and the PVC cylindrical case 20 and the pin 23 are removed and cured at room temperature for 24 hours, and then the end portion of the first potting portion 11 (CC shown in FIG. 9). Surface) was cut with a tip saw type rotary blade, and the end face of the hollow fiber membrane 1 was opened.

  Subsequently, a silicone O-ring 15 was attached to the first potting portion 11, and a case 3 made of polysulfone was attached. Further, an upper cap 4 and a lower cap 5 were attached to both ends to obtain a hollow fiber membrane module 101A as shown in FIG. Thereafter, ethanol was fed to the hollow fiber membrane module 101A and filtered, and the pores of the hollow fiber membrane 1 were filled with ethanol. Subsequently, RO water was fed and filtered, and ethanol was replaced with RO water.

  The first potting part forming jig and the first potting part were measured using a surface roughness meter. The measurement was performed using a Mitutoyo Surftest SV-2000N2, and the detector was scanned along the axial direction of the hollow fiber membrane module. Table 1 shows the measured surface roughness. In Table 1, the arithmetic average roughness Ra of the jig surface was 0.68 μm, and the arithmetic average roughness Ra of the first potting portion surface was 0.83 μm.

(Example 2)
Example: Except for using the first potting part molding jigs 21A and 21B, which were prepared by buffing the surface after milling a polyacetal resin and having an arithmetic average roughness Ra of 1.10 μm on the jig surface. A hollow fiber membrane module 101A was produced in the same manner as in No. 1.

  The first potting part forming jig and the first potting part were measured using a surface roughness meter. The measuring machine and measuring method are the same as those in the first embodiment. Table 1 shows the measured surface roughness. The surface roughness was different because the polishing process was different from the jig of Example 1, but the arithmetic average roughness Ra of the jig surface was 1.10 μm, and the arithmetic average roughness Ra of the surface of the first potting part was 1.08 μm.

(Example 3)
Example: Except for using the first potting part molding jigs 21A and 21B, which were prepared by buffing the surface after milling a polyacetal resin and having an arithmetic average roughness Ra of 1.58 μm on the jig surface. A hollow fiber membrane module 101A was produced in the same manner as in No. 1.

  The first potting part forming jig and the first potting part were measured using a surface roughness meter. The measuring machine and measuring method are the same as those in the first embodiment. Table 1 shows the measured surface roughness. Since the jigs of Examples 1 and 2 were different in the polishing process, the surface roughness was different, but the arithmetic average roughness Ra of the jig surface was 1.58 μm, and the arithmetic average roughness of the surface of the first potting part. Ra was 1.59 μm.

Example 4
Example: Except for using the first potting part forming jigs 21A and 21B, which were prepared by milling a polypropylene resin and then buffing the surface, and having an arithmetic average roughness Ra of the jig surface of 1.33 μm. A hollow fiber membrane module 101A was produced in the same manner as in No. 1.

  The first potting part forming jig and the first potting part were measured using a surface roughness meter. The measuring machine and measuring method are the same as those in the first embodiment. Table 1 shows the measured surface roughness. The arithmetic average roughness Ra of the jig surface was 1.33 μm, and the arithmetic average roughness Ra of the first potting portion surface was 1.41 μm.

(Comparative Example 1)
Example: Except for using the first potting part forming jigs 21A and 21B, which were prepared by buffing the surface after milling a polyacetal resin and having an arithmetic average roughness Ra of 1.83 μm on the jig surface. A hollow fiber membrane module 101A was produced in the same manner as in No. 1.

  The first potting part forming jig and the first potting part were measured using a surface roughness meter. The measuring machine and measuring method are the same as those in the first embodiment. Table 1 shows the measured surface roughness. Since the surface buffing process was not sufficient, the arithmetic average roughness Ra of the jig surface was 1.83 μm, and the arithmetic average roughness Ra of the first potting portion surface was 1.90 μm.

(Comparative Example 2)
Except for using the first potting part forming jigs 21A and 21B, which were prepared without milling the surface after milling a polyacetal-based resin and having an arithmetic average roughness Ra of 14.6 μm on the jig surface. A hollow fiber membrane module 101A was produced in the same manner as in Example 1.

  The first potting part forming jig and the first potting part were measured using a surface roughness meter. The measuring machine and measuring method are the same as those in the first embodiment. Table 1 shows the measured surface roughness. Since the surface was not buffed, the arithmetic average roughness Ra of the jig surface was 14.6 μm, and the arithmetic average roughness Ra of the first potting portion surface was 22.5 μm.

  From Examples 1 to 4 and Comparative Examples 1 and 2, the cartridge-type hollow fiber membrane module of the present invention having a smoothened seal surface can be used without concern such as leakage to raw water filtrate or contamination with bacteria. It can be said that it is particularly effective to do so.

  The cartridge-type hollow fiber membrane module, the jig for molding the potting part of the hollow fiber membrane cartridge and the method for producing the cartridge-type hollow fiber membrane module of the present invention are used in the fermentation industry, the pharmaceutical production field, the food industry field, the water treatment field, etc. can do.

DESCRIPTION OF SYMBOLS 100 Hollow fiber membrane cartridge 101A Cartridge type hollow fiber membrane module 101B Cartridge type hollow fiber membrane module 101C Cartridge type hollow fiber membrane module 1 Hollow fiber membrane 2 Hollow fiber membrane bundle 3 Housing | casing 3A collar part 3B collar part 4 upper cap 4A step part 5 Lower cap 6 Raw water inlet 7 Filtrate outlet 8 Raw water outlet 9 Cylindrical case 9A Ridge part 9B Step part 10 Rectification holes 11, 112, 113 First potting part 11A Potting part 11B Protective potting part 11C Ridge part 11D Step part 12 2nd potting part 13 2nd potting part case 14 Through-hole 15 O-ring 16 O-ring 17 Gasket 18 Gasket 19 Potting agent feeder 20 PVC cylindrical case 21A First potting part molding jig 21B For first potting part molding Jig 22 Second Potting Parts molded jig 23 pin 24 groove

Claims (10)

A housing;
A hollow fiber membrane bundle having a plurality of hollow fiber membranes, a potting agent for adhering the hollow fiber membranes so that the hollow fiber membranes are open at at least one end of the hollow fiber membrane bundle, and the hollow A potting portion comprising a bonded portion of the yarn membrane, and a hollow fiber membrane cartridge comprising:
A first sealing material for liquid-tightly fixing the potting portion to the housing;
With
The potting part has a first seal surface in contact with the first seal material,
The cartridge-type hollow fiber membrane module, wherein the first seal surface is molded with the potting agent, and the arithmetic average roughness Ra of the first seal surface is 1.6 μm or less. A housing;
A cylindrical case housed in a housing;
A hollow fiber membrane bundle having a plurality of hollow fiber membranes, a potting agent for adhering the hollow fiber membranes so that the hollow fiber membranes are open at at least one end of the hollow fiber membrane bundle, and the hollow A potting portion comprising a bonded portion of the yarn membrane, and a hollow fiber membrane cartridge comprising:
A first sealing material for liquid-tightly fixing the potting portion to the cylindrical case;
With
The potting portion has a seal first surface in contact with the first seal material,
The cartridge-type hollow fiber membrane module, wherein the first seal surface is molded with the potting agent, and the arithmetic average roughness Ra of the first seal surface is 1.6 μm or less. The housing includes a cylindrical housing body and an upper cap attached to a first end in the height direction of the housing body,
The cartridge-type hollow fiber membrane module further includes a second sealing material that fixes the end of the potting portion on the filtrate side in a liquid-tight manner with the upper cap,
The potting portion has a second seal surface in contact with the second seal material,
The cartridge-type hollow fiber according to claim 1 or 2, wherein the second seal surface is formed of the potting agent, and the arithmetic average roughness Ra of the second seal surface is 1.6 µm or less. Membrane module. The cartridge type hollow fiber membrane module according to any one of claims 1 to 3, wherein the potting agent contains an epoxy resin or a polyurethane resin. The potting portion includes a potting portion main body for bonding the hollow fiber membranes, and a protective potting layer provided on a surface of the potting portion main body on which the hollow fiber membrane extends.
The cartridge type hollow fiber membrane module according to any one of claims 1 to 4, wherein an elongation of the potting agent for forming the protective potting layer is 30% or more. The cartridge type hollow fiber membrane module according to any one of claims 1 to 5, wherein the hollow fiber membrane is a hollow fiber membrane made of a fluorine resin or a polysulfone resin. A jig for forming the potting part of the cartridge type hollow fiber membrane module according to any one of claims 1 to 6,
A surface for forming the first seal surface;
The potting part forming jig, wherein an arithmetic mean roughness Ra of a surface on which the first seal surface is formed is 1.6 μm or less. And a surface for forming the second seal surface.
The jig for potting portion forming according to claim 7, wherein an arithmetic average roughness Ra of a surface for shaping the second seal surface is 1.6 µm or less. It is a manufacturing method of the hollow fiber membrane cartridge in the hollow fiber membrane cartridge module according to any one of claims 1 to 6,
The following steps (a) and (b):
(A) disposing the jig according to claim 7 or 8 so as to surround at least one end of a bundle of hollow fiber membranes having a plurality of hollow fiber membranes;
(B) a potting agent that bonds between the hollow fiber membranes by curing the potting agent in the jig and covers the side surface of the hollow fiber membrane bundle; and a hollow fiber membrane that is bonded with the potting agent; Forming a potting part having
A method for manufacturing a hollow fiber membrane cartridge The following step (c):
(C) It further comprises shape | molding the protective potting layer whose elongation after hardening is 30% or more in the surface where the said hollow fiber membrane extends in the said potting part. Manufacturing method of hollow fiber membrane cartridge.

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