JP2014161781A - Membrane module and membrane unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve durability, chemical resistance and high-temperature resistance of a connection part between a filter member and a filtration collecting member.SOLUTION: In each membrane module 1a-1d, a collecting member 3, including a connection part between one end of a filter member 2 and a filtration collecting member 3 for introducing a filtered fluid from one end, is covered with a molding part 41 of a covering material 4 comprising a self-hardening inorganic material.

Description

  The present invention relates to a module and its unit that are applied not only in a normal temperature environment but also in a special environment that requires a relatively high temperature or chemical resistance.

  The membrane module generally has a configuration in which a filtration assembly member from which filtered fluid is led out is connected to one or both ends of the filtration member (Patent Documents 1 to 4, etc.). The filtration member and the filtration assembly member are connected by a fusing agent and an adhesive.

Japanese Patent Laid-Open No. 11-76764 JP 2005-125198 A Japanese Patent Laid-Open No. 10-57775 Special table 2003-533344 gazette Special table 2008-507392 Japanese Patent Laid-Open No. 10-180060 JP 2011-73967 A

  When the filtration member and the filtration assembly member are made of a polymer material, a membrane module in which the adhesive strength between the two members is secured by a fusing agent or an adhesive can be obtained.

  However, when the filtration member is made of an inorganic material (for example, ceramics) and the filtration assembly member is made of a polymer material, if an adhesive made of a polymer resin is applied to the joining of the two members, the joining of the polymer materials is However, it is difficult to obtain a durable bonding strength.

  In addition, the connecting portion of the two in the conventional membrane module is in a mode of being in direct contact with the water to be treated (for example, sewage, waste water, etc.) and is directly affected by various substances and temperature contained in the water to be treated. Become.

  Further, Patent Document 5 discloses a membrane module in which an end portion of a filtration member is fixed with a self-hardening inorganic material. The membrane module of Patent Document 5 is a bundle of a plurality of filtration members (hollow fiber membranes), but does not have a function of a member that closes one end side of the filtration member or a filtration assembly member that guides filtrate water. . On the other hand, although the membrane module disclosed in Patent Documents 6 and 7 does not use a self-curing inorganic member, heating and firing are required for connection.

  Furthermore, the membrane module is not limited to the above-mentioned water treatment system, and the high-temperature gas generated in the process of detoxification of high-temperature exhaust gas containing dust generated in incinerators, melting furnaces, etc. and bitumen production from oil sands. There is a growing need for application in special environments such as oil-water separation.

  This invention is made | formed in view of said situation, and makes it a subject to improve the durability of the connection part of a filtration member and a filtration assembly member, chemical resistance, and high temperature resistance.

  Therefore, the membrane module of the present invention includes a connecting portion between one end of the filtration member and a filtration assembly member that introduces a fluid filtered from the one end, and the assembly member is formed by a molding portion of a covering material made of a self-hardening inorganic material. It is characterized by being coated. The membrane unit of the present invention includes a plurality of the membrane modules.

  According to the above invention, since at least the connection portion between the filtration member and the filtration assembly member is covered, the connection portion is not exposed to the object to be processed. When the filtration member and the filtration assembly member are connected by an adhesive, liquid tightness between the members is further ensured.

  As an aspect of the said filtration assembly member, it consists of a cylinder and what has the insertion groove in which the end of the said filtration member is inserted formed in this cylinder parallel to the axial direction of the said cylinder is mentioned. In addition, when the insertion groove is formed up to one end of the cylindrical body, the insertion operation of the filtration member into the filtration assembly member is facilitated.

  Therefore, according to the above invention, the durability, chemical resistance, and high temperature resistance of the connection portion between the filtration member and the filtration assembly member are improved.

(A) Longitudinal sectional view of a membrane module of one end single pulling type in the embodiment of the invention, (b) Longitudinal sectional view of the membrane module of single end pulling type in the embodiment of the invention, (c) One end center in the embodiment of the invention The longitudinal cross-sectional view of the membrane module of a drawing system, (d) The longitudinal cross-sectional view of the membrane module of a center pulling system in both ends in embodiment of invention. (A) is a longitudinal cross-sectional view of a membrane module of the one end pulling type membrane module of the embodiment of the invention, and (b) is a membrane member of the one end pulling type of the filtration member width direction juxtaposition type in the embodiment of the invention. (A) is a front view of the membrane unit in 1st embodiment of invention, (b) is the one-side side view of the unit. (A) is a front view of the membrane unit in 2nd embodiment of invention, (b) is the one-side side view of the unit. (A) is a front view of the membrane unit in 3rd embodiment of invention, (b) is the one-side side view of the unit. (A) is a side view of a filtration assembly member in which an insertion groove is formed, and (b) is a longitudinal sectional view of the filtration assembly member in which the filtration member is inserted and fixed. (A) is a side view on one end side of the molding part of the covering material covering the filtration assembly member, (b) is a front view on one end side of the membrane module having the molding part, and (c) is the other end of the membrane module. The side view of the one end side of the molding part of the covering material on the side, (d) is a one-side front view of the other end side of the membrane module provided with the molding part. (A) is a longitudinal cross-sectional view of the membrane module on the manufacturing base, (b) is a side view showing the end side of the filtration assembly member to which the filtration member is inserted and fixed, and (c) is a side surface of the assembly member. The longitudinal cross-sectional view of the membrane module with which the formwork of the coating | molding material molding part was mounted | worn on the production stand. The longitudinal cross-sectional view explaining the process in which the formwork of a coating material molding part is removed from a membrane module. (A) is a side view of a surface-treated filtration assembly member, (b) is a side view showing a stopper formed on the outer peripheral surface near one end of the filtration assembly member, and (c) is an insertion groove formed to one end. The side view of the filtration assembly member, (d) is a side view showing a mode in which the filtration member inserted into the insertion groove of the assembly member is fixed from both ends by the fixing members, (e) is a cap shape, the groove is The side cross-section of the cap-shaped fixing member formed, the vertical cross-section of the cylindrical fixing member formed with the release slit, the side surface of the cylindrical fixing member, and the cap-shaped cylindrical fixing member formed with the groove The figure which showed the side. (A) is a longitudinal cross-sectional view showing an end of a filtration assembly member into which a filtration member formed by converging a circular hollow fiber membrane in a plate shape on a manufacturing stand is inserted, and (b) shows the filtration member. The perspective view shown, (c) is a longitudinal cross-sectional view showing the end of the filtration assembly member into which the filtration member formed by converging ultra-thin hollow fiber membranes in a plate shape on the production stand, (d) The perspective view which showed the same filtration member.

  Embodiments of the present invention will be described below.

[Mode of membrane module]
A membrane module 1a illustrated in FIG. 1 (a) is a one-sided pulling-type membrane module, and one end of a filtration member 2 and a filtration assembly member for introducing a filtered fluid (hereinafter referred to as filtration fluid) from the one end. 3 is formed by covering and forming the aggregate member 3 with a covering material 4. One end of the filtration assembly member 3 for discharging the filtration fluid is exposed from the molding portion 41 of the covering material 4. In addition, the molding part 41 of the coating | covering material 4 is formed also in the one end side of the filtration member 2 in which the filtration assembly member 3 is not comprised.

  The membrane module 1b illustrated in FIG. 1B is a double-sided pulling membrane module, and a filtration assembly member 3 is connected to both ends of the filtration member 2. The filtration assembly member 3 is covered with a molding portion 41 of the covering material 4 including at least a connection portion with the filtration member 2. One end of the filtration assembly member 3 for discharging the filtration fluid is exposed from the molding portion 41.

  The membrane module 1c illustrated in FIG. 1C is a one-end centered membrane module, and includes a connection portion between one end of a filtration member 2 and a filtration assembly member 3 for introducing a filtration fluid from the one end. The member 3 is formed by coating with a covering material 4. A filtration fluid discharge pipe 5 is connected to the central part of the filtration assembly member 3 and is exposed from the molding part 41 of the covering material 4. In addition, the shaping | molding part 41 is formed also in the one end side of the membrane module 1c in which the filtration assembly member 3 is not comprised.

  The membrane module 1 d illustrated in FIG. 1D is a membrane module of a center-drawing type at both ends, and a filtration assembly member 3 is connected to both ends of the filtration member 2. The filtration assembly member 3 is covered with a molding portion 41 of the covering material 4 including at least a connection portion with the filtration member 2. Similarly to the filtration assembly member 3 of the membrane module 1 c, a filtration fluid discharge pipe 5 is connected to the central portion of the assembly member 3 and exposed from the molding portion 41 of the covering material 4.

  The membrane module 1e illustrated in FIG. 2 (a) is a one-sided pulling-type membrane module, and includes a connection portion between one end of the filtration member 2 and a filtration assembly member 3 for introducing filtration fluid from the one end. The assembly member 3 is formed by coating with a coating material 4. Both ends of the filtration assembly member 3 for discharging the filtration fluid are exposed from the molding portion 41 of the covering material 4. In addition, the shaping | molding part 41 is formed also in the one end side of the filtration member 2 in which the filtration assembly member 3 is not comprised.

  The membrane module 1f illustrated in FIG. 2 (b) is a one-end double-drawing membrane module, in which filtration members 2 are arranged side by side in a plurality of width directions, and a filtration assembly that introduces a filtration fluid from the one end. The assembly member 3 including the connecting portion with the member 3 is formed by coating with a covering material 4. Similar to the filtration assembly member 3 of the membrane module 1 e, both ends of the assembly member 3 for discharging the filtered fluid are exposed from the molding portion 41 of the covering material 4. In addition, the shaping | molding part 41 is formed also in the one end side of the filtration member 2 in which the filtration assembly member 3 is not comprised.

  The filtration member 2 is composed of a plate-like cell provided with an organic membrane, a ceramic membrane, and a separation membrane exemplified by an inorganic membrane other than the ceramic membrane. Examples thereof include those provided with an organic membrane hollow fiber membrane, an organic flat membrane, an inorganic flat membrane, an inorganic single tube membrane and the like. Examples of the material of the organic film include cellulose, polyolefin, polysulfone, PVDF (polyvinylidene fluoride), PTFE (polytetrafluoroethylene), and the like. The pore size of the filtration membrane provided in the filtration member 2 is selected according to the particle size of the substance to be subjected to solid-liquid separation. For example, if it is used for solid-liquid separation of activated sludge, a filtration membrane having a pore size of 0.5 μm or less is applied, and if sterilization is required, such as filtration of purified water, a pore size of 0.1 μm or less is used. A filtration membrane is used.

  The filtration assembly member 3 is a member in which an organic material such as an inorganic material exemplified by metal or ceramics or a resin is formed in a cylindrical or prismatic cylindrical body. Examples of the metal include SUS materials. Examples of the ceramics include those obtained by curing a ceramic fiber tube with an inorganic adhesive or the like. The resin is selected from thermosetting resins, thermoplastic resins, two-component curable resins, ultraviolet curable resins, and the like. If the operating temperature is about 200 ° C. or lower, a pipe made of an organic material such as polytetrafluoroethylene (PTFE), polyimide, polyphenylin sulfite (PPS), or ceramic fluorine fiber may be applied. When this filtration assembly member 3 is covered with a molding part 41 of a covering material 4 made of a self-hardening inorganic material, which will be described later, the member 3 also functions as a reinforcing material for the molding part 41.

  As shown in FIGS. 6 (a) and 6 (b), an insertion groove 31 into which one end of the filtration member 2 is inserted is formed in the filtration assembly member 3 in parallel with the axial direction of the member 2. The filtration assembly member 3 is in contact with the filtration fluid, but is not directly exposed to the object to be treated, and is reinforced by covering the portion other than the filtration outlet with the coating material 4. In addition, the material of the filter assembly member 3 takes into consideration the usage environment such as the pH of the filtration fluid and the chemical that cleans the membrane module, and the ease of manufacturing the member main body and the workability of bonding with the filter member 2 and the covering material 4 Selected. Furthermore, as shown in FIG. 11A, the surface of the filtration assembly member 3 may be subjected to a surface treatment 32 such as a chemical (primer) treatment or a rough surface treatment before being coated. As shown in FIG. 2B, a stopper 34 for preventing the pipe attached to the member 3 from dropping off is appropriately formed on the outer peripheral surface of the filtration assembly member 3 in the vicinity of the filtered fluid discharge side end. Is done.

  Further, as shown in FIG. 11C, the insertion groove 31 may be formed up to one end of the filtration assembly member 3. According to this aspect, the operation of inserting the filtration member 2 into the filtration assembly member 3 is facilitated. In this case, the filtration member 2 inserted into the insertion groove 31 is fixed by fixing members 33 from both ends of the insertion groove 31 as shown in FIG.

  The fixing member 33 is formed of the same material as that of the filtration assembly member 3. Examples of the fixing member 33 include fixing members 33a to 33e illustrated in FIG. The fixing members 33a and 33b are attached to the release end of the insertion groove 31 shown in FIG. The fixing member 33a is of a cylindrical cap type that closes the opening on the one end side of the filtration assembly member 3. In the cap-type fixing member 33b, an insertion groove 331 into which the filtration member 2 is inserted is formed in parallel with the axial direction of the member 33b. The fixing members 33 c to 33 e are attached to the non-open end of the insertion groove 31. The fixing member 33c is formed of a cylinder having a release slit 332 formed therein. The fixing member 33d is a cylindrical body. The fixing member 33e is formed of a cylindrical body, and an insertion groove 331 into which the filtration member 2 is inserted is formed in parallel with the axial direction of the cylindrical body.

  The covering material 4 is made of a self-hardening inorganic material. Self-hardening inorganic material is a material that is mixed with an appropriate amount of water to ensure fluidity and can be used as a mold member. It is a material that has the property of developing hydraulic properties that do not decrease its strength even when placed on the surface. Examples of the self-hardening inorganic material include castable materials and cement-based materials.

  The castable material is a refractory material in which hydraulic cement (alumina cement or the like) is used as a binder and mixed with a refractory aggregate. Various refractories such as clay and high alumina are used for the refractory aggregate. When a phosphate (for example, primary aluminum phosphate) or sodium silicate is added as a binder, the castable material is resistant to acid. Can be secured.

  The maximum use temperature of the castable material varies depending on the type of the aggregate, and the high use temperature of the high alumina refractory is higher than that of the clay refractory. However, even if it is a clay refractory, since the maximum use temperature is 900 degreeC or more, in this embodiment, heat-resistant conditions are fully satisfy | filled. Therefore, the selection criteria for the castable material are determined based on the usage environment (acid resistance, alkali resistance, etc.), material characteristics (required compressive strength, thermal expansion coefficient, thermal conductivity, etc.) and workability.

  Examples of the cement-based material include cement and a combination of cement and aggregate. A mixture of cement and water is called cement paste, and mortar is a mixture of aggregates such as cement, water and sand. Concrete is a mixture of fine aggregates such as cement, water and sand, and gravel mixed with coarse aggregates. The coarse aggregate is an aggregate containing 85% or more by weight of 5 mm or more. A fine aggregate is an aggregate that passes through a 10 mm sieve and contains 85% or more by weight of 5 mm or less. The type of cementitious material including the content of these aggregates is selected under conditions that do not hinder the function of the membrane modules 1a to 1f, including the smoothness of the molding portion 41 and the like.

  Examples of the cement include well-known Portland cement, mixed cement, and special cement, and may be selected according to the application.

  The strength, durability, and water tightness of the molded cement-based material are closely related to the water cement ratio when kneading and mixing cement and water, so the water cement ratio according to the use of the membrane module should be 55% or less. Good.

  In addition, when ensuring heat resistance and acid resistance in cementitious materials, select alumina cement classified as special cement for cement, and aggregates to be mixed with this include alumina, cordierite, mullite, and silica. Fine powders and particles of a material rich in heat resistance as exemplified may be applied.

  Furthermore, polymer cement mortar and polymer cement concrete can be used in addition to the cement-based material. Polymer cement mortar and polymer cement concrete are concrete and mortar in which a polymer admixture is mixed as a cement modifier when mixing cement, water, and aggregate. Adhesiveness compared to ordinary mortar, It has excellent water-tightness and chemical resistance.

Moreover, a fiber material is mix | blended for the toughening of the coating | covering material 4 as needed. As the fiber material, glass fiber, rock wool, ceramic fiber (for example, fiber made of Al ₂ O ₃ and SiO ₂ ), alumina fiber having a high Al ₂ O ₃ content, or the like is used. The fiber size is set to, for example, a diameter of about 6 to 10 μm, and the fiber length is set to, for example, about 1 to 5 mm. The length takes into account the thickness of the molded body of the covering material 4.

  The amount of the fiber material used is about 0.5 to 3 parts by weight with respect to 100 parts by weight of the self-hardening inorganic material. If it is less than 0.5 part by weight, the effect of improving the mechanical strength is small, and if it exceeds 3 parts by weight, the fluidity of the kneaded product tends to be lowered and the workability tends to be poor.

  The molding part 41 of the covering material 4 is molded into a rectangular parallelepiped shape as illustrated in FIGS. When the membrane modules 1a, 1c, 1e, and 1f are suspended from one end side as shown in FIG. 3, the molding portion 41 on the lower end side has a longitudinal section as shown in FIGS. Is formed in a downwardly convex trapezoidal shape, the positioning of the installation in a unit having a plurality of membrane modules becomes easy.

  The filtration member 2 and the filtration assembly member 3 are connected by an adhesive 6 as shown in FIG. The adhesive 6 has both an adhesive function and a liquid tight function. The bonding function also functions as a temporary tack. Moreover, as shown in the figure, one end of the filtration member 2 to which the filtration assembly member 3 is not attached is sealed by the seal member 20 to ensure a liquid-tight function. The liquid tight function prevents the four components of the covering material from entering the filter assembly member 3 and the filter member 2 during the manufacturing process of the membrane modules 1a to 1f. The liquid-tight function only needs to function until the covering of the filtration assembly member 3 with the covering material 4 is formed, and does not require excessive pressure resistance. It is sufficient that these functions are performed at least until the completion of the integral molding work by the covering material 4, and the functions can be replaced by the covering material 4 after the work is finished (after molding and solidification).

  Examples of the adhesive 6 include inorganic adhesives and organic adhesives. Examples of inorganic adhesives include silica adhesives and ceramic adhesives. Organic adhesives are acrylic resin adhesives, urethane resin adhesives, epoxy resin adhesives, vinyl chloride resin solvent adhesives, silicone adhesives, nitrocellulose adhesives, phenol resin adhesives, polyvinyl alcohol Examples of such adhesives are melamine resin adhesives, urea resin adhesives. Further, from the features and functions of the adhesive 6, it can be classified into instantaneous adhesives, elastic adhesives, two-component room temperature curing resin adhesives, thermosetting resin adhesives, hot melt adhesives, etc. It selects according to the use conditions of modules 1a-1f.

  In addition, characteristics, such as chemical resistance and water-tightness, are formed by applying a synthetic resin material to the surface of the molding part 41 or the boundary part between the molding part 41 and the filtering member 2 to form a continuous film on the surface or the boundary part. Can be improved. Thereby, the reliability of the membrane module using the above cement-based material is further improved. Examples of the synthetic resin paint include phenol resin paint, synthetic resin blend paint, phthalic acid resin paint, epoxy resin paint, modified epoxy resin, tar epoxy resin paint, polyurethane resin paint, alkyd modified silicone resin paint, acrylic silicone resin paint, chloride Examples thereof include rubber-based resin paints, vinyl chloride resin paints, and fluororesin paints. These synthetic resin paints are selected as a single or a combination of a plurality of appropriate ones according to the purpose of use.

[Mode of membrane unit]
The mode of the membrane unit including the membrane modules 1a to 1f will be described.

  The membrane unit 7 illustrated in FIGS. 3A and 3B is a unit including a plurality of membrane modules 1a, 1e, and 1f. The membrane unit 7 includes a frame 70 in which a plurality of modules are arranged in parallel so that the longitudinal direction of the membrane modules 1a, 1e, and 1f is vertical. The solid line arrow shown in FIG. 5A indicates “the flow of the object to be processed”, and the dotted line arrow indicates “the flow of the filtered fluid”. In the membrane unit 7, one end side of the filtration assembly member 3 exposed from the molding part 41 on the upper end side of the membrane modules 1 a, 1 e, 1 f is in a negative pressure state, so that the object to be treated is solid-liquid by the filtration member 2 of the membrane module. The filtered fluid obtained by the separation is discharged from the one end.

  The frame 70 includes a pair of upper end support portions 72 that support the molded portion 41 on the upper end side of the membrane modules 1 a, 1 e, and 1 f at the upper end frame portion 71 of the frame 70, and the lower end frame portion 73 of the frame 70. And a lower end support portion 74 that supports the molding portion 41 on the lower end side of the modules 1a, 1e, and 1f. The upper end of the frame 70 is provided with an upper end pressing portion 75 that presses the molding portion 41 on the upper end side. The lower end support portion 74 is formed with a recess that fits with the molding portion 41 on the lower end side, and positioning of the membrane modules 1a, 1e, and 1f in the frame 70 is facilitated. Note that a pipe 50 such as a flexible pipe is connected to one end of the filtration assembly member 3 exposed from the molding portion 41 on the upper end side of the membrane modules 1a, 1e, and 1f. The pipe 50 is further supplied with a filtration introduced from each module. A filtration outlet pipe 51 for transferring the fluid out of the system is connected.

  In the membrane unit 8 illustrated in FIGS. 4A and 4B, a frame 81 in which a plurality of modules are arranged in parallel with the longitudinal direction of the membrane module 1 c being horizontal is stacked in the unit frame 80. The unit frame 80 is fixed on the gantry 82. The membrane module 1c is supported in the frame 81 by fitting the upper end and lower end of the molding part 41 at both ends with the upper end frame part 811 and the lower end frame part 812 of the frame 81, respectively. A pipe 50 such as a flexible pipe is connected to the discharge pipe 5 of each membrane module 1c, and a lead-out branch pipe 52 for collecting the filtered fluid introduced from each module is further connected to the pipe 50. The branch pipe 52 is connected to a filtration outlet pipe 51 for transferring the collected filtered fluid to the outside of the system. When the membrane module 1d of the center-drawing type at both ends is provided, the same piping system for taking out the filtered fluid as the membrane module 1c is used for the discharge pipes 5 exposed from the molding portions 41 at both ends of the filtration member 2 (described above). The pipe 50, the branch pipe 52, and the outlet pipe 51) are connected.

  In the membrane unit 9 illustrated in FIGS. 5A and 5B, a frame 91 in which a plurality of modules are arranged in parallel is laminated in the unit frame 90 such that the longitudinal direction of the membrane module 1 b is horizontal. The unit frame 90 is fixed on the foundation frame 92.

  In the membrane module 1b, the upper end of the molding part 41 is fitted to the upper end frame part 911 of the frame 91, while one end of the filtration assembly member 3 exposed from the lower end of the molding part 41 is supported on the lower end frame part 912 of the frame 91. It is supported in the frame 91 by being connected to the pipe 93 via the connector pipe 94. The branch pipe 93 is connected to a filtration outlet pipe 95 for transferring the filtered fluid collected from each membrane module 1b to the outside of the system.

  The unit frame 90 can also include a membrane module 1a. In the case of the membrane module 1 a, the lower end portion of the molding portion 41 that does not expose the filter assembly member 3 is fitted and supported by a support portion (not shown) disposed on the lower end frame portion 912 of the frame 91.

[Example of manufacturing method of membrane module]
An example of the manufacturing method of the membrane module of this embodiment is demonstrated. Here, an example of the manufacturing process of the membrane module 1a will be described.

  First, as shown in FIG. 8 (a), one end of the filtration member 2 is inserted into the insertion groove 31 of the filtration assembly member 3, while the other end of the member 2 has a cylindrical support in the same form as the assembly member 3. The assembly member 3 and the support body 12 are vertically placed in the recessed portions 11 a and 11 b on the manufacturing base 10 in a state of being inserted into the support groove 121 of the body 12.

  Next, the support bars 13a and 13b arranged at intervals equivalent to the entire length of the filtration member 2 are detachably attached to the recess portions 11a and 11b in a state where the support rods 13a and 13b are inserted through the filtration assembly member 3 and the cylindrical support body 12, respectively. Is supported vertically. The support bars 13a and 13b serve to support the filtration assembly member 3 on the production base 10 and to regulate the overall length of the membrane module 1a.

  In the embodiment illustrated in FIG. 12A, the filtration assembly member 3 into which the filtration member 2 formed by converging the circular hollow fiber membrane illustrated in FIG. The part 11a is supported by the support bar 13a. The embodiment illustrated in FIG. 7C is a filtration assembly member in which the end side resin layer 21 of the filtration member 2 formed by converging the ultrafine hollow fiber membrane illustrated in FIG. 3 is supported by a support bar 13 a in a recess 11 a of the manufacturing base 10.

  Then, as shown in FIGS. 8A, 8 </ b> B, and 8 </ b> C, the insertion groove 31 of the filtration assembly member 3 and the filtration member 2 are bonded by the adhesive 6.

  Next, as shown in FIG. 9, the molds 14 a and 14 b assembled at both ends of the filtering member 2 are detachably installed on the manufacturing base 10 in the coating material injection process. Lubricating oil such as grease is appropriately applied to the inner surfaces of the molds 14a and 14b in order to facilitate the separation of the mold 4 after molding of the covering material 4. A sealing member 15 such as an O-ring or a square ring is appropriately interposed between the molds 14a and 14b and the filtration member 2 and the filtration assembly member 3. In addition, a sealing plug 16 is attached to the opening on the end side of the filtration assembly member 3 that does not function as an outlet for the filtered fluid. Thereafter, the covering material 4 is injected into the space in the molds 14a and 14b. For example, a powdered castable material mixed with an appropriate amount of water and kneaded is injected. The water content of the kneaded product is adjusted to 18 to 24% by mass so that fluidity can be ensured and water does not become excessive. In the injection process, the kneaded product is degassed by vibration by a vibrator or stirring by a stirring bar so that the components of the kneaded product flow into every corner of the molds 14a and 14b. Thereafter, the mixture is allowed to stand to sufficiently cure the kneaded product. In addition, you may dry by heating.

  After the covering material 4 injected into the spaces in the molds 14a and 14b is cured, the filter member 2 is removed from the production base 1 with the molds 14a and 14b mounted as shown in FIG. Next, the molds 14 a and 14 b are removed from the filter member 2. Then, the sealing member 15 is removed from the filtration member 2 and the filtration assembly member 3.

  Through the above-described steps, the molding part 41 made of the covering material 4 is formed at both ends of the filtration member 2, and one molding part 41 covers and covers the connection part between the filtration member 2 and the filtration assembly member 3. The membrane module 1a with the filtered fluid discharge port exposed is completed. The membrane modules 1b to 1f are also manufactured in the same manner as the above-described steps.

[Effect of this embodiment]
According to the membrane modules 1a to 1f described above, at least the connection portion between the filtration member 2 and the filtration assembly member 3 is covered with the covering material 4, so that the portion is not exposed to the object to be processed. Thereby, even if the filtration member 2 is made of an organic material (or an inorganic material) and the filtration assembly member 3 is made of an inorganic material (or an organic material), the connection portion between them is included in the object to be processed. It is not directly affected by various substances and temperature, and durability, chemical resistance and high temperature resistance are improved.

  In addition, the liquid-tightness between the members 2 and 3 is further ensured by adhering the filtering member 2 and the collecting member 3 with an adhesive before the filtration collecting member 3 is coated. Therefore, it is possible to prevent the four components of the covering material from entering the filtration assembly member 3 during the manufacturing process of the membrane modules 1a to 1f. The mode in which the filtration member 2 is inserted and bonded into the insertion groove 31 of the filtration assembly member 3 is not limited to the flat filtration membrane, but a pipe-like filtration membrane, a soft sheet, or a pipe. It is also possible to apply a fine filtration membrane or an ultrafine hollow fiber membrane.

  Further, by forming the insertion groove 31 up to one end of the filtration assembly member 3, the insertion operation of the filtration member 2 into the filtration assembly member 3 is facilitated in the manufacturing process of the membrane modules 1a to 1f.

  For example, in the aspect of FIG. 8A, an insertion groove similar to the insertion groove 31 is formed also in the cylindrical support 12. In the insertion preparation process of the filtration assembly member 3, a support bar 13a is mounted on the groove portion 11a of the manufacturing base 10, and the filtration assembly member 3 is placed in the groove portion 11a so that the open end of the insertion groove 31 is the upper end. The On the other hand, a support bar 13b is mounted on the groove 11b, and the cylindrical support 12 is placed on the groove 11b so that the open end of the insertion groove is the upper end. When the filtration member 2 is inserted into the insertion groove 31 of the filtration assembly member 3, both ends in the width direction of the filtration member 2 are aligned with the insertion groove 31 of the filtration assembly member 3 and the insertion groove of the support 12, respectively. May be moved downward.

  Furthermore, various aspects of the membrane module and the membrane unit exemplified by the membrane modules 1a to 1f and the membrane units 7 to 9 are realized by arbitrarily securing the outlet of the filtration fluid in the filtration assembly member 3.

DESCRIPTION OF SYMBOLS 1a-1f ... Membrane module 2 ... Filtration member 3 ... Filtration assembly member, 31 ... Insertion groove 4 ... Cover material, 41 ... Molding part 6 ... Adhesives 7-9 ... Membrane unit

Claims (7)

A membrane module comprising a connecting portion between one end of a filtration member and a filtration assembly member for introducing a fluid filtered from the one end, and the assembly member is covered with a molding portion of a covering material made of a self-hardening inorganic material. . The membrane module according to claim 1, wherein the filtration member and the assembly member are connected by an adhesive. The filtration assembly member is composed of a cylinder, and an insertion groove into which one end of the filtration member is inserted is formed in parallel with the axial direction of the cylinder, and the insertion groove is formed up to one end of the cylinder. The membrane module according to claim 1 or 2, wherein the membrane module is formed.   The membrane module according to any one of claims 1 to 3, wherein a synthetic resin material is applied to a surface of the molded part or a boundary part between the molded part and the filtration member. A membrane unit comprising a plurality of membrane modules according to any one of claims 1 to 4. 6. The membrane unit according to claim 5, wherein a plurality of the membrane modules are arranged in parallel in the longitudinal direction. 6. The membrane unit according to claim 5, wherein a plurality of the membrane modules are arranged in parallel in the longitudinal direction.

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