JP2007167794A - Filter structural body and fluid separating module using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that conventional filter structural bodies are insufficient for chemical resistance and generate cracks in the bonding layers of support bodies with filters. <P>SOLUTION: This filter structural body 10 has a plurality of porous pipe-shaped filters 1 and a pair of support bodies 2 provided with a plurality of penetrating holes 4, and is manufactured by inserting and supporting the respective filters 1 in the respective penetrating holes 4 and bonding them through the bonding layers 3. The end surfaces of the filters 1 are arranged as they remain projected from the main surfaces of one side of the support bodies 2 and at least both the end parts of filters are covered with first protecting layers 5a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a filter structure and a liquid separation module including a filter capable of transmitting and separating two kinds of liquids, particularly water and other liquids or solids.

  A fluid separation module is known as an apparatus for selectively separating dirt such as organic substances present in a liquid. The fluid separation module is composed of a filter with a metal film or inorganic oxide film deposited on the surface of an organic material such as polymer resin or a porous material such as ceramics, and a flat support, which supports each filter. The filter structure fixed by the body is arranged in the casing.

  As shown in FIG. 5A, this filter structure is composed of a plurality of filters 21 and a support body 22 for focusing and fixing the filter 21, and the support body 22 is shown in FIG. As shown in the exploded perspective view shown in FIG. 5b, the porous body 22a has a honeycomb structure having a plurality of through holes, and an outer frame plate 22b provided on the outer periphery of the porous body 22a. Further, both ends of the filter 21 are inserted into the respective through holes 24 of the porous body 22 a and are fixed to the porous body 22 a by the bonding layer 23 made of an adhesive filled in the through holes 24.

  Since the support body 22 is composed of the porous body 22a having a honeycomb structure, the strength of the support body 22 is improved, whereby the thickness of the support body 22 can be reduced and the support body 22 is reduced in weight. It has been shown that it can.

  Further, in the filter structure proposed in Patent Document 2, the support body 22 holding each filter has through holes formed at predetermined pitches, and both main surfaces of the support body 22 are penetrated. A recess 22c is formed over the region where the hole exists. The filter 21 and the support 22 are fixed by an adhesive in which the end of the filter 21 is inserted into each through hole of the support 21 and the both ends of the filter 21 and the support 22 are filled in both main surfaces of the recess 22c. Are integrally fixed by a bonding layer 23 made of

According to this filter structure, since the interval between the filters 21 is determined by the interval between the through holes of the support 22, the interval between the filters 21 can be accurately maintained. Therefore, it is supposed that a problem such that a non-processed liquid organic matter or the like accumulates between the filters 21 and the flow path is blocked can be prevented.
JP 2004-141762 A JP 2003-144862 A

In the conventional filter structure, as shown in FIG. 5, the end surface of the filter 21 is held at the same height as the main surface of the porous body 22 a, so that the bonding layer 23 easily flows into the opening of the filter 21. Therefore, there is a problem that the channel is likely to be blocked.

  Further, in the filter structure as shown in FIG. 6, each filter 21 is held by a bonding layer 23 made of an adhesive filled in recesses 22c formed on both main surfaces of the support 22, but the patent document 1, the bonding layer 23 is held at the same height as the end face of the filter 21, and there is a problem that the adhesive easily flows into the opening and the channel is likely to be blocked.

  Further, since the bonding strength between the filter 21 and the support 22 is determined by the thickness of the support 22, it is necessary to increase the thickness of the support 22 in order to increase the bonding strength, and the weight of the filter structure itself increases. There was a problem.

  Further, when separating the fluid to be treated such as muddy water, if the bonding layer 23 is held at the same height as the end face of the filter 21, plants such as algae contained in the fluid to be treated are contained in the filter 21. There was a problem that it was easy to flow in directly and the channel was likely to be blocked.

  Furthermore, since the adhesive layer 23 used in Patent Documents 1 and 2 is made of a resin agent such as an epoxy resin or a silicon resin, it has a problem that it is inferior in chemical resistance and cannot be used for a long period of time. It was.

  Furthermore, when the filter structure is used as a fluid separation module, stress is applied to the joint between the filter 21 and the support 22 when the fluid to be treated is filtered or when filth remaining in the pores in the filter 21 is removed. There is a problem of concentrating and generating cracks in the bonding layer 23 and the filter itself.

  The filter structure of the present invention has a pair of supports having a plurality of through-holes and a plurality of tubular filters made of a porous body, and the pair of supports are spaced apart from each other, A filter structure in which both end portions of each filter are inserted into each through-hole and bonded via a bonding layer, and both end surfaces of each filter are arranged so as to protrude to one main surface side of the support body The first protective layer is formed on at least one main surface of the support.

  The first protective layer formed between the filters protruding toward the one main surface side of the support has a U-shaped cross section that gradually increases toward the end face of the filter in a cross section parallel to the axial direction of the filter. It is characterized by being.

  Further, a second protective layer is formed between the filters extending to the other main surface side of the support, and has a U-shaped cross section that gradually increases toward the center of the filter in the cross section. Features.

  Furthermore, the bonding layer has a void inside.

  Furthermore, the first protective layer, the second protective layer, and the bonding layer are formed of the same material.

  Further, the first protective layer, the second protective layer, and the bonding layer are made of glass.

  The fluid separation module of the present invention is characterized by using the filter structure.

  According to the filter structure of the present invention, the filter structure has a pair of support bodies having a plurality of through holes and a plurality of tubular filters made of a porous body, and the pair of support bodies are arranged apart from each other. In addition, the filter structure is formed by inserting both end portions of each filter into each through hole and bonding them through a bonding layer, and both end surfaces of each filter project to one main surface side of the support. Since the first protective layer is formed on at least one main surface of the support, the bonding layer that joins the filter and the support is prevented from being formed in the flow path of the filter. be able to. Further, when separating the fluid to be treated such as muddy water, plants and the like are easily entangled with the projecting portion, so that the flow into the filter can be prevented and blockage of the flow path can be suppressed. Furthermore, high bonding strength between the filter and the support can be maintained without increasing the thickness of the support.

  In addition, each filter extending to the other main surface side of the support is covered with a second protective layer, and the second protective layer has a U-shaped cross section. It is possible to prevent cracks from occurring in the filter and the bonding layer.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  1A and 1B show an embodiment of a filter structure of the present invention, in which FIG. 1A is a perspective view, FIG. 1B is a cross-sectional view taken along line AA in FIG. 1A, and FIG. FIG.

  FIG. 2 is a schematic cross-sectional view showing an embodiment of a fluid separation module provided with the filter structure of the present invention.

  The filter structure 10 according to the present invention includes a pair of supports having a plurality of through holes 4 penetrating between main surfaces, and a porous body that can selectively permeate and separate filth such as organic matter from the liquid to be treated. A plurality of tubular filters.

  The support 2 is composed of two flat plates and is a dense alumina sintered body, siliceous sintered body, cordierite sintered body, forsterite sintered body, steatite sintered body, zirconia It is preferably made of a sintered body, a silicon carbide-based sintered body, a silicon nitride-based sintered body, glass or the like, and it is desirable that the thermal expansion coefficient with the filter 1 is approximated within ± 1 ppm / ° C. Further, the thickness of the support 2 is preferably 1 to 20 mm, particularly preferably 5 to 10 mm, and the outer peripheral shape of the support 2 is appropriately adjusted according to the inner wall shape of the housing 6.

  The filter 1 has a tubular shape, and an inner diameter side forms a flow path 1a through which a fluid to be processed passes. The material of the filter 1 is a porous alumina sintered body, zirconia sintered body, siliceous sintered body, cordierite sintered body, titania sintered body, etc. In terms of fluid separation performance, it is desirable that the inner diameter is 1 to 5 mm and the wall thickness is 0.3 to 1 mm.

  Furthermore, the filter 1 preferably has a porosity of 20% or more and 50% or less. Since the flow rate of the fluid to be treated that passes through the filter 1 is constant, the porosity is 20% or more, and the filtration pressure of the fluid to be treated is suppressed from being reduced or the filter 1 is prevented from being damaged against the pressure during backwashing. Therefore, the porosity is preferably 50% or less. Further, in order to efficiently separate the filth contained in the fluid to be treated, the average pore diameter is 0.05 μm or more and 2 μm or less, and since no filth is deposited on the surface of the filter 1, the surface roughness (Ra) is 2 μm or less. preferable. Further, in order to enhance the fluid permeation efficiency by promoting the flow and diffusion of the fluid to be processed in the filter structure 10, the bonding layer 3 has a maximum distance between all the filters 1 in the range of 0.1 mm to 3 mm. It is better to be connected through.

  The filter 1 and the support 2 are bonded by a bonding layer 3 made of an adhesive, and the bonding layer 3 is preferably bonded by an inorganic bonding agent. For example, it joins and seals with at least 1 sort (s) chosen from glass, ceramics, etc. When the bonding layer 3 is an organic bonding agent, the organic filth separated from the organic bonding agent reacts due to an increase in environmental temperature, and the bonding layer 3 is denatured to bond the filter 1 and the support 2. This is because the strength is lowered and the deterioration of the filter structure 10 is accelerated. Specifically, it is preferable that the main component is a glass such as borosilicate glass, lead glass, alkali silicate glass, quartz glass, or bismuth silicate glass, particularly glass having excellent heat resistance and thermal shock resistance. Alternatively, it is preferably made of an inorganic bonding agent to which a filler mainly composed of alumina, silica, zirconia, titania, cordierite or the like is added and approximated with a thermal expansion coefficient within ± 1 ppm / ° C. with the filter 1. Particularly in water treatment applications, borosilicate glass having excellent chemical resistance is preferable.

  The filter structure 10 of the present invention is mainly used as a fluid separation module 100. As shown in FIG. 2, the support body 2 of the filter structure 10 is attached to a fixing member 8 disposed in a housing 6. It is fixed and sealed with a ground packing, a metal, resin or rubber gasket 7 interposed. The housing 6 is provided with a supply port 9 for supplying a fluid to be treated, a filtration fluid discharge port 10 for discharging the fluid filtered by the filter structure 10, and a concentrated fluid discharge port 11 containing filth such as organic matter. Yes. Note that a discharge valve (not shown) is disposed at the concentrated fluid discharge port 11. Further, as a method of obtaining the fluid filtered by the fluid separation membrane module 100, the fluid to be treated is fed into the housing 6 through the supply port 9 while the exhaust pressure valve on the concentrated fluid discharge port 11 side is throttled. From the side to the flow path 1a in the filter 1. At this time, since the exhaust pressure valve on the side of the concentrated water discharge port 11 is throttled, pressure is applied to the fluid to be treated in the flow path 1 a, and the fluid filtered through the filter 1 is extracted and discharged from the filtered fluid discharge port 15. The

  Here, in the filter structure 10 of the present invention, as shown in FIGS. 1B and 3, both end surfaces of each filter 1 are arranged so as to protrude toward one main surface side of the support 2, and at least the support 2. It is important that the first protective layer 5a is formed on one of the main surfaces.

  Thus, since both end surfaces of the filter 1 are arranged so as to protrude toward the one main surface side of the support 2, the bonding layer 3 for bonding the filter 1 in the through hole 4 of the support 2 is provided for each filter 1. In other words, it is possible to prevent the fluid to be processed such as a liquid from being separated more efficiently. Moreover, when a plant such as algae is contained in the fluid to be treated, it is possible to entangle the plant at the protruding portion, and it is possible to prevent the plant from flowing into the flow path 1a of the filter 1. Blockage can be suppressed.

  At the same time, since the first protective layer 5a is formed on at least one main surface (outer side) of the support 2, the first protective layer 5a prevents damage to both ends of the filter 1. It is also possible to do. About 0.3 to 1.5 MPa is applied to both ends of the filter 1 when the fluid to be treated is fed into the fluid separation module 100 or backwashed. Therefore, the both ends of the filter 1 may be broken, chipped, or cracked by the pressure of the fluid due to this pressure. However, both ends of the filter 1 are covered with the first protective layer 5a. It is possible to prevent the pressure of the fluid to be treated from being directly applied to the substrate.

  As described above, the first protective layer 5a is in close contact with the filter 1 for the purpose of preventing filth such as organic matter from penetrating into the pores of the filter 1 and preventing damage at both ends of the filter 1. It is preferable to select a material having excellent properties. Therefore, it is preferable that the adhesive is made of a resin agent such as an epoxy resin or a silicon resin, or is made of the same material as the bonding layer 3. In particular, if the same material as the bonding layer 3 is used, the adhesion strength between the bonding layer 3 and the first protective layer 5a can be improved, so that the bonding strength of the filter 1 to the support 2 can be improved. Characteristics can be improved. Further, when the first protective layer 5a is glassy, it is possible to improve the chemical resistance and heat resistance of the first protective layer 5a itself, so that the filter structure can be used for a long period of time. The body 10 can be obtained.

  Further, as shown in FIGS. 3A and 3B, the first protective layer 5 a formed between the filters 1 protruding to one main surface side of the support 2 is parallel to the axis of the filter 1. It is preferable that the cross-section is a U-shaped cross section that gradually increases toward the end face of the filter 1 in a simple cross section.

  Thereby, since the 1st protective layer 5a will cover the outer peripheral part of the filter 1 which protruded from the one main surface of the support body 2, the residue of filth, such as an organic substance contained in a to-be-processed fluid, is prevented, and a filter It is possible to prevent bacteria and the like from growing at both ends of 1 and multiplying. This is because the filter 1 is a porous body in which the porosity is 20% or more and the average pore diameter is 0.05 to 2 μm as described above. When both ends of the filter 1 are in direct contact with the fluid to be treated, filth such as organic matter remains in the pores of the filter 1. In order to remove this residue, the fluid separation membrane module 100 performs backwashing on the filter 1 periodically or according to usage conditions, but both ends of the filter 1 are in a position where backwashing water at the time of backwashing is difficult to reach. Because.

  The first protective layer 5 a gradually increases toward the end surface of the filter 1, but is preferably formed to a height that does not form the end surface of the filter 1. The first protective layer 5a is often a viscous body having fluidity when formed. Therefore, if the first protective layer 5a is formed to the same height as the end face of the filter 1, the first protective layer 5a may be formed in the flow path 1a of the filter 1, and the fluid separation module 100 is used. This is because there is a possibility of causing the channel to be blocked. On the other hand, by forming the first protective layer 5a at a height that does not form the end face of the filter 1, it is possible to prevent cracks and the like from being generated in the filter 1 made of a porous material.

  In addition, since the first protective layer 5 a has a U-shaped cross section, it is possible to increase the bonding strength between the filter 1 and the support 2 without increasing the thickness of the support 2. Moreover, since the amount of the first protective layer 5a between the filters 1 can be reduced by adopting the U shape, thermal expansion occurs in the filter 1 and the first protective layer 5a due to the temperature change of the fluid to be processed. In addition, it is possible to suppress the occurrence of peeling or cracking at the joint between the filter 1 and the first protective layer 5a due to the difference in thermal expansion between them.

  Thus, in order to form the first protective layer 5 in a U-shaped cross section, the filter 1 is inserted into each through hole of the support 2 and then between the filters 1 on one main surface of the support 2. Then, a glass paste to be the first protective layer 5a is applied, dried and heat-treated. In the course of drying and heat treatment, the solvent and organic substances contained in the glass paste are evaporated and heat treated, so that the viscosity of the glass paste is lowered during the heat treatment and wets toward the end face of the filter 1 by the action of surface tension. It can be shaped like a letter. Moreover, when using a resin agent, after apply | coating a resin agent between the filters 1 on one main surface of the support body 2, after making the filter 1 project further, it is made into U-shaped cross section, and then the resin agent is dried. Just do it. In addition, what is necessary is just to apply | coat glass paste or a resin agent slightly lower than the end surface of the filter 1, and can apply | coat easily with a dispenser etc.

  Furthermore, the protrusion amount of both end faces of the filter 1 is preferably in the range of 1 to 7 mm, and particularly preferably in the range of 1.5 to 5 mm. This is a preferable amount of protrusion that forms a U-shaped cross section when surface tension acts when the first protective layer 5a is made of glass because it is a viscous fluid having fluidity when formed. Moreover, when a resin agent is used, it is the amount of protrusion suitable for making it a U-shaped cross section. Moreover, it is the amount of protrusion suitable also for entanglement of plants such as algae contained in the muddy water, and there is no problem for entwining the plant when excessively protruding, but the first protective layer 5a is difficult to be formed, This is because the filter 1 is damaged.

  The first protective layer 5a is also preferably formed on the outer peripheral edge of the flat plate-like support 2, and the support 2 is made of a ceramic sintered body, so that a void is formed on the surface of the ceramic sintered body. Intervenes. Since this void also causes filth residue to remain, the filth residue can be prevented by covering the outer peripheral edge of the support 2 with the first protective layer 5a.

  Further, in FIG. 1A, the bonding layer 3 is formed up to the same height as the one main surface 12a of the support 2, but is not limited to being the same, and is positioned lower than the one main surface 12a. It may be formed at a position higher than one main surface 12a.

  Furthermore, in the filter structure 10 of the present invention, as shown in FIGS. 3A and 3B, the second protective layer 5 b is formed between the filters 1 extending on the other main surface of the support 2. In addition, a U-shaped cross section that gradually increases toward the center of the filter 1 in a cross section parallel to the axis of the filter 1 is preferable.

  In the backwashing of the fluid separation module 100, either the supply port 9 or the concentrated fluid discharge port 11 is closed, and backwash water is supplied from the filtered fluid discharge port 10 side. The supplied backwash water reaches the flow path 1a through the pores of the filter 1, and at the same time, the filth remaining in the pores of the filter 1 is discharged to the flow path 1a. Moreover, since the pressure of the backwash water at the time of backwashing is about 1.5 to 3 times the pressure at which the fluid to be treated is fed, stress is concentrated on the interface between the filter 1 and the support 2. Thus, it is possible to prevent cracks and cracks generated at the interface. In addition, since the second protective layer 5b between the filters 1 has a U-shaped cross section, it is possible to stabilize the bonding between the support 2 and the filter 1.

  The second protective layer 5b is preferably made of the same material as the adhesive or the bonding layer 3 made of a resin agent such as an epoxy resin or a silicon resin, similarly to the first protective layer 5a. In particular, if the material is the same as that of the bonding layer 3, the bonding strength between the bonding layer 3 and the second protective layer 5b can be improved, so that the bonding strength of the filter 1 to the support 2 can be improved. Characteristics can be improved.

  Furthermore, the first protective layer 5a, the second protective layer 5b, and the bonding layer 3 are made of the same material, so that the filter 1 can be easily replaced. The fluid separation module 100 is unable to remove dirt clogged in the pores of the filter 1 over a long period of use, or the fluid permeation efficiency due to damage to the filter 1 or cracks generated in the bonding layer 3 and the protective layer 5. May cause a decline. In this case, the first protective layer 5a, the second protective layer 5b, and the bonding layer 3 are made of the same material, so that the new first protective layer 5a and the second protective layer 5b are replaced when the filter 1 is replaced. And it becomes possible to form the joining layer 3 in a lump.

  Moreover, since the outer peripheral part of the filter 1 in which the first protective layer 5a, the second protective layer 5b, and the bonding layer 3 are formed does not substantially contribute to the filtration of the fluid to be treated, the protective layer 5a, The material of 5b and the joining layer 3 can maintain favorable joining of the filter 1 with respect to the support body 2 by penetrating into the inside through the pores of the filter 1. Moreover, since the ceramic sintered body is used for the filter 1, the 1st protective layer 5a, the 2nd protective layer 5b, and the joining layer 3 are borosilicate glass, lead glass, alkali silicate glass, bismuth silicate glass, etc. It is preferable to use a low melting point glass. These low melting point glasses have good wettability with the ceramics constituting the filter 1 and can penetrate into the pores of the filter 1. In particular, considering chemical resistance, the protective layers 5a and 5b and the bonding layer 3 are preferably borosilicate glass.

  Further, as shown in FIGS. 3A and 3B, the bonding layer 3 for bonding the filter 1 in the through hole has a gap 13 therein, so that the fluid to be treated is filtered or backwashed. Even if a crack occurs in the bonding layer 3 due to the pressure, the crack can be prevented from reaching from one main surface of the bonding layer 3 to the other main surface. That is, since the progress of cracks is stopped in the gaps 13 in the bonding layer 3, it is possible to prevent fluid from leaking from between the filter 1 and the support 2 when the fluid to be treated is filtered or backwashed. Further, as shown in FIG. 3B, it is preferable that the gap 13 exists completely in the bonding layer 3 without contacting the support 2 and the filter 1. When the fluid to be treated is filtered, filth may penetrate into the gap 13 through the filter 1 near the bonding layer 3. This is because the filth that has penetrated into the gap 13 is difficult to remove by backwashing, and bacteria caused by the filth may grow in the gap 13. Further, the number of the gaps 13 is not limited to the number as long as the bonding strength between the filter 1 and the support 2 in the bonding layer 3 is not deteriorated.

  As for the filter structure 10 of this invention, it is preferable to arrange | position the coupling body 14 between the opposing surfaces of a pair of support body 2, as shown in FIG.1 (b), (c). The coupling body 14 has an effect of relieving torsional shear stress generated when the filter structure 10 is handled and fixed in the housing 6. Further, since it is possible to prevent contact with the filter 1, it is possible to prevent cracking of the filter 1 during handling. As shown in FIG. 1 (b), the connection body 14 and the support body 2 can be joined by forming a concave hole in the support body 2 and inserting it into the hole. At this time, the coupling body 14 and the support body 2 may be bonded via a bonding agent. Further, the coupling body 14 is preferably formed of an inorganic material having a thermal expansion coefficient close to that of the filter 1, thereby reducing thermal strain generated when the fluid separation module 100 is used at a high temperature. It is possible to prevent the separation module 100 from being damaged. The connecting body 14 is appropriately selected according to the number of the filters 1 forming the filter structure 10 or the area of the support 2.

  Furthermore, sectional drawing of various embodiment of the support body 2 used for the filter structure 10 of this invention is shown to Fig.4 (a)-(d). In the case of (a) to (c), the one main surface 12a of the support 2 mainly refers to a region having the through holes 4, and the through holes in which the respective filters 1 are arranged as shown in (d). When 4 is formed in a counterbore shape, the bottom face part of each counterbore shape is referred to as one main surface 12a. Thus, the support 2 has various shapes and can be appropriately selected depending on the fluid separation module in which the honeycomb structure is incorporated.

  Next, the manufacturing method of the filter structure 10 of the present invention will be described.

  For example, a desired organic binder is added to a predetermined ceramic powder having an average particle diameter of 0.05 to 10 μm, particularly an average particle diameter of 0.1 to 2 μm, and the desired shape is obtained by a known molding means such as extrusion molding or injection molding. After forming, the filter 1 made of ceramics is produced by firing. The average particle size of the ceramic forming the filter 1 is preferably 0.1 to 2 μm.

  On the other hand, a molded body obtained by adding a desired organic binder to the above-described ceramic and / or glass powder and molding it into a desired shape having through holes 4 by a known molding means such as extrusion molding, press molding, casting molding, injection molding, or the like. After being obtained, the molded body is fired to produce a support 2 having a plurality of through holes 4.

  In addition, the above glass powder having an average particle size of 5 μm or less, particularly 2 μm or less, and further 0.5 μm or less, ceramic powder such as alumina, silica, zirconia, cordierite, etc., an organic binder and a solvent such as α-theopineol are mixed. Then, a slurry for forming the bonding layer 3 is prepared.

  Then, both ends of the filter 1 are inserted into the through holes 4 of the two supports 2 described above, and the slurry is filled between the through holes 4 of the support 2 and the filter 1. To do.

  Next, the obtained structure is heated to, for example, 800 ° C. or higher, particularly 1000 to 1150 ° C. in order to increase the filling depth of the bonding layer 3 into the filter 1. Can be softened, melted or sintered to form the bonding layer 3, and the filter structure 10 can be obtained by fixing and sealing the filter 1 and the support 2.

  When the protective layer 3 is formed, the filter structure 10 is obtained, and then the adhesive for forming the protective layer 3 is applied and dried, or is applied and dried in the same manner as the bonding layer 3 and then heat-treated. Is done.

  The present invention can be used for a filter structure including a filter that transmits and separates a liquid such as water and a gas contained in the liquid, or a liquid and a solid.

  Moreover, it is possible to use for the fluid separation module provided with the said filter structure.

(A) is a perspective view, (b) is a sectional view taken along line AA in FIG. (A), and (c) is an exploded perspective view of one end portion.
It is a figure which shows one Embodiment of the filter structure of this invention, (a) is a perspective view, (b) is sectional drawing in the AA line in the same figure (a), (c) is a disassembled perspective view of one end part FIG. It is a schematic sectional drawing which shows one Embodiment of the fluid separation module provided with the filter structure of this invention. (A), (b) is a fragmentary sectional view which shows the joining state of the filter of a filter structure of this invention, and a support body. (A)-(d) is sectional drawing of various embodiment of the support body used for the filter structure of this invention. (A) is a principal surface figure of the conventional filter structure, (b) is an exploded perspective view. It is a fragmentary sectional view which shows the joining state of the filter and support body of the conventional filter structure.

Explanation of symbols

10: filter structure 1, 21: filter 1a: flow path 2, 22: support 3, 23: bonding layer 4, 24: through hole 5a: first protective layer 5b: second protective layer 6: housing 7 : Gasket 8: Fixing member 9: Supply port 10: Filtration fluid discharge port 11: Concentrated fluid discharge port 12a: One main surface 13: Cavity 14: Connection body 22a: Porous body 22b: Outer frame plate 22c: Concave part 100: Fluid Separation module

Claims (7)

A pair of supports having a plurality of through-holes and a plurality of tubular filters made of a porous body, the pair of supports being spaced apart from each other, and each filter in each through-hole The filter structure is formed by inserting both end portions of the filter and joining them via a joining layer, wherein both end surfaces of the filters are arranged to project toward one main surface side of the support body, and at least one of the support body A filter structure, wherein a first protective layer is formed on a main surface. The first protective layer formed between the filters protruding to the one main surface side of the support has a U-shaped cross section that gradually increases toward the end face of the filter in a cross section parallel to the axial direction of the filter. The filter structure according to claim 1. A second protective layer is formed between the filters extending to the other main surface side of the support, and has a U-shaped cross section that gradually increases toward the center of the filter in the cross section. The filter structure according to claim 1 or 2. The filter structure according to claim 1, wherein the bonding layer has a void inside. The filter structure according to claim 1, wherein the first protective layer, the second protective layer, and the bonding layer are formed of the same material. The filter structure according to claim 1, wherein the first protective layer, the second protective layer, and the bonding layer are made of glass. A fluid separation module using the filter structure according to claim 1.

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