WO2011010636A1 - 水分交換用中空糸膜モジュール - Google Patents
水分交換用中空糸膜モジュール Download PDFInfo
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- WO2011010636A1 WO2011010636A1 PCT/JP2010/062171 JP2010062171W WO2011010636A1 WO 2011010636 A1 WO2011010636 A1 WO 2011010636A1 JP 2010062171 W JP2010062171 W JP 2010062171W WO 2011010636 A1 WO2011010636 A1 WO 2011010636A1
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- Prior art keywords
- hollow fiber
- fiber membrane
- hollow
- cylindrical porous
- gas
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- 239000012528 membrane Substances 0.000 title claims abstract description 151
- 239000012510 hollow fiber Substances 0.000 title claims abstract description 144
- 239000012530 fluid Substances 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000007800 oxidant agent Substances 0.000 abstract description 11
- 230000001590 oxidative effect Effects 0.000 abstract description 11
- 238000012856 packing Methods 0.000 abstract 4
- 239000007789 gas Substances 0.000 description 87
- 239000000446 fuel Substances 0.000 description 22
- 238000000034 method Methods 0.000 description 12
- 239000002737 fuel gas Substances 0.000 description 6
- 239000011347 resin Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000004382 potting Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- WHOZNOZYMBRCBL-OUKQBFOZSA-N (2E)-2-Tetradecenal Chemical compound CCCCCCCCCCC\C=C\C=O WHOZNOZYMBRCBL-OUKQBFOZSA-N 0.000 description 1
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003014 ion exchange membrane Substances 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229940044654 phenolsulfonic acid Drugs 0.000 description 1
- 229920000172 poly(styrenesulfonic acid) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 229940005642 polystyrene sulfonic acid Drugs 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04156—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal
- H01M8/04171—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying with product water removal using adsorbents, wicks or hydrophilic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
- B01D63/033—Specific distribution of fibres within one potting or tube-sheet
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04089—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants
- H01M8/04119—Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying
- H01M8/04126—Humidifying
- H01M8/04149—Humidifying by diffusion, e.g. making use of membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/10—Specific supply elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2313/00—Details relating to membrane modules or apparatus
- B01D2313/12—Specific discharge elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- the present invention relates to a moisture exchange hollow fiber membrane module suitable for use in, for example, a fuel cell system, and more particularly to a technique for improving humidification efficiency with respect to humidified gas.
- a fuel cell As a fuel cell, a laminated body in which separators are laminated on both sides of a flat membrane electrode assembly (MEA) is used as a unit cell, and a fuel cell stack in which several unit cells are laminated, for example, several hundred layers.
- MEA flat membrane electrode assembly
- the membrane electrode structure has a three-layer structure in which an electrolyte membrane made of an ion exchange resin or the like is sandwiched between a pair of electrodes constituting a positive electrode (air electrode, cathode) and a negative electrode (fuel electrode, anode).
- Patent Document 1 discloses that an anode exhaust gas after use in which the partial pressure of water vapor is increased by adding power generation generated water as water vapor to the fuel gas in the fuel gas flow path is used as a humidified gas, and unused fuel.
- a fuel cell system for humidifying gas is disclosed.
- the membrane electrode structure tends to become thinner as the performance of the fuel cell becomes higher, and the phenomenon that the water generated by the electrochemical reaction and coming out to the air electrode side moves to the fuel electrode side seems to occur. It has become. For this reason, when the fuel gas is humidified, a wet state of the fuel electrode becomes excessive, and a phenomenon called flooding occurs in which contact between the fuel and the fuel electrode is hindered. On the other hand, on the air electrode side, it is known that there are cases in which the electrochemical reaction is not so hindered even when the degree of wetting is excessive. Therefore, recently, a technique for humidifying the oxidant gas rather than humidifying the fuel gas has been emphasized.
- Patent Document 2 supplies dry unused oxidant gas to one space of a humidifier partitioned by a water vapor permeable membrane
- a technique is disclosed in which exhausted oxidant gas (off-gas) after being used is supplied to the space of the water to move moisture from the off-gas to the oxidant gas via a water vapor permeable membrane.
- Patent Documents 3 to 6 a hollow fiber membrane is filled in a humidifier, and an unused oxidant gas is circulated inside the hollow of the hollow fiber membrane.
- a technique is disclosed in which off-gas is circulated so as to be in contact with the outer wall of the hollow fiber membrane and moisture is transferred through the hollow fiber membrane. According to these techniques, since a large number of fine hollow fiber membranes are filled in the humidifier, the contact area for performing moisture movement is remarkably increased, compared with the technique described in Patent Document 1. Humidification efficiency is improved.
- the hollow fiber membrane swells due to moisture absorption during the movement of moisture, when filling the humidifier, it is necessary to provide a gap between the hollow fiber membranes in advance in consideration of dimensional changes. It cannot be packed closely. In this way, there is a gap between the hollow fiber membranes, and the hollow fiber membranes can be elastically deformed. Therefore, when off-gas is introduced into the humidifier, the off-gas is introduced into the hollow fiber at the introduction portion where the gas flow rate is the highest. The film is pushed away, and a gap is formed. Since the off gas flows as a bypass path through the gap, there is a problem that the humidification efficiency is lowered because the gas cannot be uniformly circulated in the humidifier.
- Patent Document 4 manufactures a number of hollow fiber membranes that are bundled and fixed together with a rigid rod, and fills the humidifier with the hollow fiber membranes. The movement of is suppressed. Further, in the techniques described in Patent Documents 5 and 6, by providing a partition plate in the humidifier, an off-gas flow path is guided, and the bias of the hollow fiber membrane in a specific direction is suppressed.
- Patent Document 4 the technique described in Patent Document 4 is not preferable because it requires a large number of hollow fiber membranes bundled together with a rigid rod, which increases the number of steps.
- the techniques described in Patent Documents 5 and 6 although the movement of the hollow fiber membrane can be suppressed as compared with the conventional technique, it is difficult to suppress even the deviation in the region partitioned by the partition plate, In addition, because the gas needs to be circulated, the partition plate cannot be made completely closed, and the deviation in the opening cannot be suppressed.
- the present invention has been made to solve the above-mentioned problems of the prior art, and of course, it is possible to sufficiently humidify the dry unused fuel cell gas supplied into the hollow fiber membrane. It is intended to provide a moisture exchange hollow fiber membrane module capable of suppressing the unevenness of the hollow fiber membrane filled in the humidifier and uniformly distributing the wet off-gas after use of the fuel cell in the humidifier. It is aimed.
- the hollow fiber membrane module for moisture exchange of the present invention has a cylindrical outer case, a cylindrical inner case enclosed coaxially with the outer case, and a space enclosed between the outer case and the inner case, A plurality of hollow fiber membranes extending in the axial direction and filled; a seal portion in which the plurality of hollow fiber membranes are fixed at both ends of the cylindrical structure and the space is sealed; and an inner case or An introduction port provided in one of the outer cases, a discharge port provided in the other of the heel inner case or the outer case, and one end side of the heel hollow fiber membrane to the other end side through the hollow interior of the hollow fiber membrane A first fluid path extending from the inlet to the second fluid path extending from the inlet to the outlet through the outside of the hollow fiber membrane and between the plurality of hollow fiber membranes extending into the space. And is coaxial with the outer and inner cases. It is characterized in that it comprises a and a cylindrical porous body.
- the moisture exchange hollow fiber membrane module having the above configuration, for example, dry unused gas (oxidant gas or fuel gas) is circulated in the first fluid path passing through the inside of the hollow fiber membrane, and the outside of the hollow fiber membrane.
- a cylindrical porous body is provided in the space filled with the hollow fiber membrane when, for example, the wet off-use off gas is circulated through the second fluid path passing through the gas to move the moisture of the off gas to the unused gas. Therefore, the hollow fiber membrane is restrained in the region surrounded by the cylindrical porous body, and the movement of the hollow fiber membrane is suppressed even in the vicinity of the inlet where the gas flow rate is large. Thereby, since the gap between the hollow fiber membrane and the inner case is not formed, the off-gas can circulate uniformly in the hollow fiber membrane module and exchange water efficiently.
- At least one end of the cylindrical porous body surrounding the hollow fiber membrane is fixed by a seal portion. According to such an aspect, since the movement of the cylindrical porous body is suppressed even when a force is applied during the flow of gas, damage to the hollow fiber membrane due to friction between the cylindrical porous body and the hollow fiber membrane is suppressed.
- a plurality of cylindrical porous bodies having different diameters can be provided coaxially in the case, the introduction port can be provided in the inner case, and the discharge port can be provided in the outer case.
- the interval between the cylindrical porous body provided on the innermost side of the plurality of cylindrical porous bodies and the inner case is smaller than any of the intervals between the other cylindrical porous bodies.
- the movement of the hollow fiber membrane can be particularly suppressed in the region between the cylindrical porous body provided on the innermost side and the inner case, that is, the inner portion where the gas flow velocity is the highest.
- the introduction port can be provided in the outer case and the discharge port can be provided in the inner case.
- the interval between the cylindrical porous body provided on the outermost side of the plurality of cylindrical porous bodies and the outer case is smaller than any of the intervals between the other cylindrical porous bodies. According to such an aspect, the movement of the hollow fiber membrane can be particularly suppressed in the region between the cylindrical porous body provided on the outermost side and the outer case, that is, in the outer portion having the largest gas flow rate.
- the hollow fiber membrane and the cylindrical porous body can be brought into contact with each other during operation of the moisture exchange hollow fiber membrane module, and formation of a gap along the inner case is reliably suppressed. .
- a mesh is preferably used because it is possible to achieve both restraint of the hollow fiber membrane and gas flow.
- the hollow fiber membrane is held and restrained by the cylindrical porous body in the portion near the inlet where the bias is most likely to occur among the hollow fiber membranes filled in the module. It is possible to suppress the unevenness of the hollow fiber membrane and to distribute the off gas in the module uniformly.
- M Hollow fiber membrane module for moisture exchange, 10 ... Outer case, 11 ... Hollow fiber membrane, 12 ... Gas inlet, 13 ... Gas outlet, 14 ... seal part, 15 ... Inner case, 20 ... Unused gas (low wetness), 21 ... Unused gas (after water exchange), 22: Off-gas after use (high humidity), 23 ... Off-gas after use (after water exchange), 30: cylindrical porous body, 31 ... 1st cylindrical porous body, 32 ... 2nd cylindrical porous body, 33 ... Third cylindrical porous body.
- a moisture exchange hollow fiber membrane module M has an outer case 10 formed in a cylindrical shape, and an inner case 15 coaxially with the outer case 10 is provided in the outer case 10. Is arranged.
- the hollow fiber membrane 11 is filled in parallel with the axial direction of the outer case 10 and the inner case 15. Since the plurality of hollow fiber membranes 11 expand upon moisture absorption, the hollow fiber membranes 11 are filled through a predetermined interval in order to absorb the dimensional change.
- Both ends of the hollow fiber membrane 11 are fixed to the outer case 10 and the inner case 10 by seal portions 14.
- the hollow fiber membrane 11 is partially omitted, but the hollow fiber membrane 11 extends between the seal portions 14 at both ends.
- the seal portion 14 is formed by embedding the outside of the hollow fiber membrane 11 in the filling space with a synthetic resin or the like, and seals only the filling space from the outside. That is, the seal portion 14 is in the filling space and fixes the hollow fiber membrane 11 at both ends of the cylindrical structure of the outer case 10 and the inner case 15.
- the hollow interior of the hollow fiber membrane 11 is not sealed, and both ends of the hollow fiber membrane 11 communicate with the outside.
- a path from the one end side (arrow 20) of the hollow fiber membrane 11 to the other end side (arrow 21) via the hollow interior of the hollow fiber membrane is defined as a first fluid path.
- the gas inlet 12 is provided in the inner case 15, and the gas outlet 13 is provided in the outer case 10 which is on the downstream side of the inlet 12 and is opposed thereto.
- a path from the inlet 12 (arrow 22) in the filling space to the outlet 13 (arrow 23) via the outside of the hollow fiber membrane 11 is defined as a second fluid path. That is, the introduction port 12 is provided in the inner case 15 that is one of the inner case 15 and the outer case 10.
- a discharge port 13 is provided in the outer case 10 which is the other of the inner case 15 and the outer case 10 where the introduction port 12 is not provided.
- a dry unused gas 20 of the fuel cell is introduced into the first fluid path, and an off gas 22 that is an exhaust gas after the gas is used in the fuel cell is used.
- the dry unused gas 20 passes through the hollow fiber membrane 11, and the wet off-gas 22 after use passes outside the hollow fiber membrane 11 in the filling space.
- the hollow fiber membrane 11 prevents gas exchange between the inside and the outside, but can move only moisture through the fine holes present on both sides thereof, so that moisture is transferred from the high wet side to the low wet side.
- FIG. 4 is a diagram for explaining problems in a conventional moisture exchange hollow fiber membrane module.
- the hollow fiber membrane 11 is fixed in the filling space with a predetermined interval in the dry state in order to change the size by being wet. Further, the hollow fiber membrane 11 has a property of elastically deforming. Therefore, as shown in FIG. 4, when the off gas 22 is introduced from the introduction port 12, the pressure increases on the side of the inner case 15 where the gas flow velocity is the highest, and the off gas 22 pushes the hollow fiber membrane 11 and deforms. A gap is generated along the line 15. The off-gas moves to the downstream side (right side in the drawing) via this gap as shown by the arrow 24, and then flows toward the discharge port 13 and is discharged.
- the off-gas does not pass through the voids of the hollow fiber membrane 11 on the upstream side (left side in the figure), and moisture movement is performed only on the downstream side, so that the utilization rate and humidification efficiency of the hollow fiber membrane 11 are low. There was a problem.
- FIG. 5 is a diagram showing an embodiment of the moisture exchange hollow fiber membrane module of the present invention that can solve the above-described conventional problems.
- the components other than the cylindrical porous body 30 are the same as those in FIGS. 1 to 3, so the description of the common parts is omitted here and is unique to the first embodiment. A structure, an effect
- a cylindrical porous body 30 is provided coaxially with the outer case 10 and the inner case 15 in the filling space, and is interposed between the plurality of hollow fiber membranes 11.
- the cylindrical porous body 30 has an opening ratio that allows a sufficient flow of off-gas, has rigidity that does not deform even when subjected to gas pressure of off-gas, and has corrosion resistance that can withstand long-term use. Consists of materials.
- the cylindrical porous body 30 is made of, for example, a mesh made of a metal such as stainless steel or plastic, and both ends thereof are fixed by being embedded in the seal portion 14.
- the method for forming the seal portion 14 in the present invention is not particularly limited, and any fixing means can be used.
- the filling space is filled with the hollow fiber membrane 11 and the cylindrical porous bodies 30 to 33 with the end portions of the outer case 10 and the inner case 15 standing, and the lower end portion is immersed and fixed in resin.
- potting is adopted in which the top and bottom are reversed and the other end is similarly immersed and fixed in the resin.
- the soaked resin seals the inside and outside of the hollow fiber membrane 11, but since the distance between the hollow fiber membranes 11 is smaller than the diameter of the hollow fiber membrane 11, the resin is soaked by capillary action. The height is different and the inside is sealed shallower than the outside of the hollow fiber membrane 11. For this reason, by cutting and removing this portion, the inside of the hollow fiber membrane 11 can be communicated with the outside of the module, the resin can remain only outside the hollow fiber membrane 11, and the filling space can be sealed.
- the expansion coefficient due to the wetness of the hollow fiber membrane 11 is grasped in advance.
- the hollow fiber membranes 11 and between the hollow fiber membranes 11 and the cylindrical porous body 30 are in contact with each other so that there is no gap between them.
- Each is arranged so as to be filled with high density or with a reduced gap.
- the hollow fiber membrane 11 and the cylindrical porous body 30 are disposed with a void (gap) therebetween.
- a known hollow fiber membrane can be selected.
- polymers such as phenol sulfonic acid, polystyrene sulfonic acid, polytrifluorostyrene sulfonic acid, perfluorocarbon sulfonic acid, etc.
- examples include an ion exchange membrane and a hollow fiber membrane such as a polymer resin or ceramic.
- the cylindrical porous body 30 when the off-gas is introduced into the filling space from the introduction port 12, the cylindrical porous body 30 has a plurality of hollow fiber membranes even if the hollow fiber membrane 11 near the introduction port 12 receives gas pressure. 11 is surrounded, the movement of the hollow fiber membrane 11 between the cylindrical porous body 30 and the inner case 15 is suppressed. Thereby, since it is suppressed that a clearance gap is formed along the inner case 15, the off-gas flows uniformly from the upstream side to the downstream side in the filling space. Thereby, the utilization factor and humidification efficiency of the hollow fiber membrane 11 are improved.
- the hollow fiber membrane 11 and the cylindrical porous body 30 are arranged with a predetermined gap in consideration of the expansion coefficient of the hollow fiber membrane 11 in advance, During operation, the hollow fiber membrane 11 and the cylindrical porous body 30 can be brought into contact with each other, and the formation of a gap along the inner case 15 is reliably suppressed.
- FIG. 6 shows another embodiment of the moisture exchange hollow fiber membrane module of the present invention, and is a view showing an example in which a plurality of cylindrical porous bodies are provided.
- the first cylindrical porous body 31, the second cylindrical porous body 32, and the third cylindrical porous body 33 are provided coaxially with the outer case 10 and the inner case 15 in the filling space. It has been.
- the cylindrical porous bodies 31 to 33 are made of a mesh made of corrosion-resistant metal or plastic, and both ends are fixed by being embedded in the seal portion 14.
- the interval between the inner case 15 and the first cylindrical porous body 31 is A 1
- the interval between the first cylindrical porous body 31 and the second cylindrical porous body 32 is A 2
- the second cylindrical shape is A 3
- most inner distance a 1 of is set smaller than any of the other intervals a 2 and a 3.
- the first tubular shape as in the first embodiment. Since the porous body 31 surrounds the innermost hollow fiber membrane 11, the movement of the hollow fiber membrane 11 is suppressed. In addition, since the second cylindrical porous body 32 and the third cylindrical porous body 33 further surround the outer hollow fiber membrane 11, the movement of the outer hollow fiber membrane 11 can also be suppressed. Thereby, the utilization factor and humidification efficiency of the hollow fiber membrane 11 are further improved as compared with the first embodiment.
- the gas flow rate is the largest near the off-gas inlet 12 and the thrust received by the hollow fiber membrane 11 tends to be large. Therefore by minimizing the A 1, it is possible to suppress the amount of movement of the hollow fiber membrane 11 to a minimum.
- the plurality of cylindrical porous bodies are not limited to the first to third cylindrical porous bodies, and any number of the first to nth (n is an integer of 2 or more) cylindrical porous bodies may be used. Can be provided. At that time, it is also similar to the spacing A 1 is preferably smaller than any of the other intervals A 2 ⁇ A n, A 1 ⁇ A 2 ⁇ ⁇ A n-1 ⁇ A n is more preferred.
- the introduction port 12 provided in the inner case 15 and the discharge port 13 provided in the outer case 10 do not limit the gas flow direction to this direction. And a mode of discharging the gas from the inlet 12 is also included.
- the outermost distance A 3 is the side where the gas is introduced, is preferably smaller than any more inner spacing A 2 and A 1 of, A 3 ⁇ A 2 ⁇ A 1 is even more preferred.
- the moisture exchange hollow fiber membrane module of the present invention is limited to a cylindrical shape.
- the cross section may be a polygonal cylinder. That is, the outer case 10 may be rectangular as shown in FIGS. 7A, 7B, 7C, hexagonal as shown in FIGS. 7D and 8E, and eight as shown in FIG.
- the cross section including a pentagon and a decagon may be a polygonal cylinder.
- the inner case 15 may be rectangular as shown in FIGS. 7A and 7C, or may be hexagonal as shown in FIG.
- the cylindrical porous body may be rectangular as shown in FIGS. 7A and 7B, or may be hexagonal as shown in FIGS. 7D and 7E, and includes pentagons, octagons, and decagons.
- the cross section may be a polygonal cylinder.
- the moisture of the off-gas discharged from the fuel cell can be reused for humidification of the unused oxidant gas, and an appropriate humidification amount of the fuel cell can be obtained by increasing the humidification efficiency in moisture exchange. Therefore, it is extremely promising when applied to an on-vehicle fuel cell system that requires strict and stable operation.
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Abstract
Description
10…外部ケース、
11…中空糸膜、
12…ガス導入口、
13…ガス排出口、
14…シール部、
15…内部ケース、
20…未使役のガス(低湿潤)、
21…未使役のガス(水分交換後)、
22…使役後のオフガス(高湿潤)、
23…使役後のオフガス(水分交換後)、
30…筒状多孔体、
31…第1筒状多孔体、
32…第2筒状多孔体、
33…第3筒状多孔体。
図5は、上述した従来の問題を解決することができる本発明の水分交換用中空糸膜モジュールの一実施形態を示す図である。なお、図5の水分交換用中空糸膜モジュールは、筒状多孔体30以外の構成要素は図1~3と共通であるため、ここでは共通部分の説明は省略し、第1実施形態特有の構成、作用および効果について説明する。
図6は、本願発明の水分交換用中空糸膜モジュールの他の実施形態を示すものであり、筒状多孔体を複数設けた例を示す図である。図6に示すように、充填空間内には、第1筒状多孔体31、第2筒状多孔体32および第3筒状多孔体33が、外部ケース10および内部ケース15と同軸的に設けられている。筒状多孔体31~33は、第1実施形態と同様に、耐食性のある金属やプラスチックからなるメッシュで構成され、両端部をシール部14に埋設されることで固定されている。
本発明においては、複数の筒状多孔体は第1~第3筒状多孔体には限定されず、第1~第n(nは2以上の整数)の任意の数の筒状多孔体を設けることができる。その際、間隔A1が他の間隔A2~Anのいずれよりも小さいことが好ましく、A1<A2<・・・<An-1<Anがさらに好ましいことも同様である。
Claims (6)
- 筒状の外部ケースと、
前記外部ケースと同軸的に内包された筒状の内部ケースと、
前記外部ケースと前記内部ケースとの間で囲われた空間に、軸方向に延在させて充填された複数の中空糸膜と、
前記空間にありかつ筒状構造の両端において、前記複数の中空糸膜を固定して前記空間を封止したシール部と、
前記内部ケースまたは前記外部ケースのうち一方に設けられた導入口と、
前記内部ケースまたは前記外部ケースのうち他方に設けられた排出口と、
前記中空糸膜の一端側から前記中空糸膜の中空内部を経由して他端側に至る第1流体経路と、
前記導入口から、前記空間でありかつ前記中空糸膜の外側を経由して前記排出口に至る第2流体経路と、
前記空間内に延在して複数の前記中空糸膜の間に介挿され、前記外部ケースおよび前記内部ケースと同軸的に配置された筒状多孔体と
を備えることを特徴とする水分交換用中空糸膜モジュール。 - 前記筒状多孔体は、少なくとも一端を前記シール部で固定されていることを特徴とする請求項1に記載の水分交換用中空糸膜モジュール。
- 径の異なる複数の筒状多孔体が前記空間内に同軸的に設けられ、
前記内部ケースに前記導入口が設けられ前記外部ケースに前記排出口が設けられ、複数の筒状多孔体のうち最も内側に設けられた筒状多孔体と前記内部ケースとの間隔が、他の筒状多孔体どうしの間隔のいずれよりも小さいことを特徴とする請求項1または2に記載の水分交換用中空糸膜モジュール。 - 前記外部ケースに前記導入口が設けられ前記内部ケースに前記排出口が設けられ、複数の筒状多孔体のうち最も外側に設けられた筒状多孔体と前記外部ケースとの間隔が、他の筒状多孔体どうしの間隔のいずれよりも小さいことを特徴とする請求項1または2に記載の水分交換用中空糸膜モジュール。
- 前記中空糸膜の乾燥状態では、中空糸膜どうしの間および中空糸膜と前記筒状多孔体との間に形成される空隙部を有し、前記中空糸膜の膨潤状態では、互いに接触することで前記空隙部を減少させることを特徴とする請求項1~4のいずれかに記載の水分交換用中空糸膜モジュール。
- 前記筒状多孔体は、メッシュであることを特徴とする請求項1~5のいずれかに記載の水分交換用中空糸膜モジュール。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP10802256.7A EP2457640B1 (en) | 2009-07-24 | 2010-07-20 | Hollow-fiber membrane module for moisture exchange |
JP2011523656A JP5523458B2 (ja) | 2009-07-24 | 2010-07-20 | 水分交換用中空糸膜モジュール |
CN201080031460.0A CN102470321B (zh) | 2009-07-24 | 2010-07-20 | 水分交换用空心丝膜模块 |
US13/381,529 US9048469B2 (en) | 2009-07-24 | 2010-07-20 | Hollow-fiber membrane module for moisture exchange |
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JP2009173489 | 2009-07-24 | ||
JP2009-173489 | 2009-07-24 |
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WO2011010636A1 true WO2011010636A1 (ja) | 2011-01-27 |
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PCT/JP2010/062171 WO2011010636A1 (ja) | 2009-07-24 | 2010-07-20 | 水分交換用中空糸膜モジュール |
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US (1) | US9048469B2 (ja) |
EP (1) | EP2457640B1 (ja) |
JP (1) | JP5523458B2 (ja) |
CN (1) | CN102470321B (ja) |
WO (1) | WO2011010636A1 (ja) |
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JP2013122902A (ja) * | 2011-12-09 | 2013-06-20 | Hyundai Motor Co Ltd | 燃料電池膜モジュールの製造方法 |
JP2017511249A (ja) * | 2014-03-24 | 2017-04-20 | コーロン インダストリーズ インク | 中空繊維膜モジュール |
WO2022255085A1 (ja) * | 2021-06-02 | 2022-12-08 | Nok株式会社 | 中空糸膜モジュール及び除加湿装置 |
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DE102014011445B4 (de) * | 2014-08-07 | 2016-06-02 | Mann + Hummel Gmbh | Filtereinrichtung mit Hohlfasern |
KR101766011B1 (ko) * | 2015-04-30 | 2017-08-07 | 현대자동차주식회사 | 연료전지용 막가습기 |
CN118043125A (zh) | 2021-08-23 | 2024-05-14 | 帕克-汉尼芬公司 | 燃料电池加湿灌封粘合剂罩套 |
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Also Published As
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EP2457640A4 (en) | 2013-12-25 |
EP2457640B1 (en) | 2015-03-11 |
JP5523458B2 (ja) | 2014-06-18 |
JPWO2011010636A1 (ja) | 2012-12-27 |
CN102470321B (zh) | 2016-03-16 |
US20120111967A1 (en) | 2012-05-10 |
CN102470321A (zh) | 2012-05-23 |
EP2457640A1 (en) | 2012-05-30 |
US9048469B2 (en) | 2015-06-02 |
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