JP2014111239A - Hydrogen separation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydrogen separation device that can be made compact, and can make a wall member thin and simplify a structure in the wall member.SOLUTION: In a hydrogen separation device (1), a hydrogen separator (9) is fixed to a wall member (3) by a fixing mechanism (11) at a part of the wall member (3) which projects from a through hole (17). Specifically, when an outside fixation part (45) is threadably engaged with a wall member fixation part (43), first and second seal members (47, 51) made of expanded graphite are pressed (through a press member (53) etc.), so the first and second seal members (47, 51) spread radially to fasten a dense part (21) which is the projection part of the hydrogen separator (9). Consequently, the hydrogen separator (9) is fixed to the wall member (3).

Description

  The present invention relates to a hydrogen separator capable of obtaining high purity hydrogen gas by selecting and separating hydrogen gas from source gas.

  Conventionally, in order to produce hydrogen to be supplied to a fuel cell, for example, a hydrogen separator that selectively extracts only hydrogen from a gas containing hydrogen such as steam reformed gas has been developed, and this hydrogen separator is used as a reactor. Various hydrogen separators have been developed.

The hydrogen separator is formed, for example, by forming a hydrogen permeable membrane (hereinafter referred to as a hydrogen separation metal layer) made of palladium (Pd) on the surface of a cylindrical ceramic porous substrate.
As shown in FIG. 10 (a), as a conventional hydrogen separator P1, for example, a device in which a hydrogen separator P5 is attached to a wall member P3 at the top of a reactor P2 by using a metal joint P4 is disclosed. (See Patent Documents 1 to 4). In this hydrogen separator P1, the whole hydrogen separator P5 protrudes below the wall member P3.

  Further, in recent years, as shown in FIG. 10B, a through hole P6 is opened in the wall member P3 to pass the proximal end side of the hydrogen separator P5, and a screw portion P7 is provided on the inner peripheral surface of the through hole P6. A technique for fixing the hydrogen separator P5 by providing and screwing a screw member P8 to the screw portion P7 has been proposed (see Patent Documents 5 and 6).

Japanese Patent No. 3933907 JP 2004-105942 A Japanese Patent No. 3770791 Japanese Patent No. 4890938 JP 2009-226374 A JP 2011-72972 A

  However, the techniques of Patent Documents 1 to 4 described above have a problem in that the hydrogen separator P1 cannot be made compact because the entire hydrogen separator P5 protrudes from one surface of the wall member P3. .

  Moreover, in the technique of the patent document 5 and 6 mentioned above, since it is necessary to provide the thread part P7 inside the wall member P3 (namely, inner peripheral surface of the through-hole P6), the wall member P3 with sufficient thickness is used. In addition, there is a problem that the internal structure of the wall member P3 is complicated because processing such as providing the threaded portion P7 in the through hole P6 is necessary.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a hydrogen separation apparatus that can make the apparatus compact, can make the wall member thin, and can simplify the internal structure of the wall member. Is to provide.

  (1) In the present invention, as a first aspect, a cylindrical hydrogen separator that allows only hydrogen to permeate is accommodated in the reactor, and one end portion in the axial direction of the hydrogen separator is a wall surface of the reactor. In the hydrogen separator fixed to the wall member constituting the wall member, the wall member has a through hole into which one end portion of the hydrogen separator is inserted, and the one end portion of the hydrogen separator is the wall member. The through hole protrudes outside the wall member and is fixed to the wall member by a fixing mechanism, and the fixing mechanism is provided integrally with the wall member outside the wall member, A cylindrical wall member fixing portion that surrounds the outer peripheral side of the protruding portion, a cylindrical outer fixing portion that is screwed to the wall member fixing portion, and an outer peripheral side of the hydrogen separator. Pressed to tighten the hydrogen separator and fix it to the wall member Characterized by comprising a sealing member.

  In the hydrogen separator according to the first aspect, the hydrogen separator is fixed to the wall member by a fixing mechanism at a portion protruding from the through hole of the wall member. Specifically, when the outer fixing portion is screwed to the wall member fixing portion, the sealing member is pressed (directly or indirectly), and thus the hydrogen separator (specifically, the protruding portion) is tightened by the sealing member. Thereby, the hydrogen separator is fixed to the wall member.

  That is, in this first aspect, one end portion of the hydrogen separator is disposed through the wall member, and the protruding portion is fixed by the fixing mechanism, so that the reactor that is a part of the hydrogen separator can be made compact, and thus The entire device can be made compact. In addition, since it is not necessary to provide a threaded portion inside the wall member as in the prior art, the thickness of the wall member can be reduced and the configuration of the wall member can be simplified.

  In addition, the reactor is a pressure vessel. By making the reactor compact, the amount of heat for heating can be reduced, and the wall thickness of the vessel can be reduced. Play.

  (2) In the present invention, as a second aspect, as the second aspect, the fixing mechanism is configured such that at least a part of the seal member is compressed and spread in a radial direction by screwing the outer fixing portion, thereby It is fixed to the wall member.

  In the second aspect, the seal member has a characteristic of spreading in the radial direction when pressed (for example, like expanded graphite). Therefore, when the seal member is pressed, it expands in the radial direction and presses the hydrogen separator from the outside, so that the hydrogen separator can be fixed and sealed (airtight) at the same time.

(3) In the present invention, as a third aspect, a pressing member that presses the sealing member is provided between the sealing member and the outer fixing portion.
In the third aspect, the configuration in which the sealing member is pressed by the pressing member is illustrated. Accordingly, when the outer fixing portion is screwed, the seal member is difficult to move in the circumferential direction, and thus can be suitably pressed.

  (4) In the present invention, in the fourth aspect, a fitting hole for fitting a tool for rotating the outer fixing portion to the outer surface in the axial direction of the outer fixing portion and receiving a turning force from the tool. It is provided with.

  In the fourth aspect, since the outer surface in the axial direction of the outer fixing portion is provided with the fitting hole, even if the surrounding space is narrow by fitting the projection of the tool into the fitting hole along the axial direction. The outer fixing portion can be easily rotated.

  That is, for example, when a nut is tightened with a tool such as a spanner, a large space for rotating the tool in the radial direction of the outer fixed portion is necessary. When the is provided, a tool can be inserted along the axial direction and screwed. Therefore, even when a large number of fixing mechanisms (and hence hydrogen separators) are arranged close to each other, the screws can be easily tightened, so that the apparatus can be made more compact.

(5) In the present invention, as a fifth aspect, the outer fixing portion has a cylindrical shape.
In the fifth aspect, since the outer fixing portion has a cylindrical shape, a large number of fixing mechanisms (accordingly, hydrogen separators) can be arranged close to each other. Therefore, the apparatus can be made more compact.

1 is a perspective view showing an internal structure of a hydrogen separator according to Example 1. FIG. (A) is sectional drawing which fractured | ruptured the hydrogen separator of Example 1 (at AA of (b)), (b) is sectional drawing which shows the longitudinal cross-section of a hydrogen separator. It is explanatory drawing which fractures | ruptures and shows the hydrogen separator in Example 1 along an axial direction. It is explanatory drawing which fractures | ruptures and expands and shows a part of hydrogen separator in Example 1. FIG. (A) The top view which shows the fixing mechanism in Example 1, (b) is explanatory drawing which fractures | ruptures and shows a fixing mechanism along an axial direction. It is explanatory drawing which decomposes | disassembles the hydrogen separator of Example 1 and shows the assembly procedure. It is explanatory drawing which illustrates arrangement | positioning of a fixing mechanism. (A) shows arrangement | positioning of the fixing mechanism in Example 2, (b) is a perspective view which shows the fixing tool used for the fixing. (A) is a top view which shows arrangement | positioning of the fixing mechanism in Example 3, (b) is a top view which shows arrangement | positioning of the fixing mechanism in Example 4. FIG. It is explanatory drawing of a prior art.

Hereinafter, embodiments of the present invention will be described.
<Configuration of wall member>
The wall member is provided with one or more through holes through which one or more hydrogen separators are respectively inserted. In particular, when a plurality of hydrogen separators are attached, through holes are formed at predetermined intervals so that each hydrogen separator and each fixing mechanism do not interfere with each other.

As the material of the wall member, SUS316, SUS316L, or the like can be adopted. Moreover, as a thickness of a wall member, the range of 2-10 mm is employable, for example.
<Configuration of fixing mechanism>
The fixing mechanism includes a wall member fixing portion, an outer fixing portion, and a seal member.

  Among these, SUS316, SUS316L, etc. can be adopted as the material of the wall member fixing portion, SUS316, SUS316L, etc. can be adopted as the material of the outer fixing portion, and expanded graphite can be adopted as the seal member.

Moreover, when using a pressing member, SUS316, SUS316L, etc. are employable as the material.
Furthermore, as the arrangement and shape of the fitting hole of the outer fixing portion, various arrangements and shapes for inserting a tool into the fitting hole and rotating the outer fixing portion can be adopted. For example, a hexagonal hole or a long hole provided at the axial center of the outer fixing portion, or a plurality of fitting holes (such as a round hole) provided around the axial center of the outer fixing portion (for example, a symmetrical position) can be employed.
<Configuration of hydrogen separator>
As the hydrogen separator, a configuration of a hydrogen separation metal layer and a support that supports the metal layer can be adopted.

As the material of the support, ceramics can be cited. As the structure of the support, a structure in which a part or the whole is made of porous ceramics can be adopted.
The part (porous part) made of this porous ceramic can permeate a gas containing hydrogen in whole or in part, and the materials thereof include yttria stabilized zirconia (YSZ), stabilized zirconia, alumina, magnesia. , Ceria, doped ceria, and mixtures thereof.

  Further, a hydrogen separator may be configured by joining a dense portion that does not transmit gas to, for example, an axial end portion of the porous portion. Here, “without gas permeability” is only required to prevent permeation of the raw material gas from which hydrogen is separated, and includes, for example, a density with a relative density of 70% or more.

  The material constituting the dense portion includes ceramics, and examples of the ceramics include yttria stabilized zirconia, stabilized zirconia, alumina, magnesia, ceria, doped ceria, and mixtures thereof.

  On the other hand, examples of the hydrogen separation metal (hydrogen permeable metal) constituting the hydrogen separation metal layer include Pd alone, Pd alloy (for example, PdAg alloy, PdCu alloy, PdAu alloy) and the like. From the viewpoint of suppressing hydrogen embrittlement, a PdAg alloy is preferable to Pd alone. Further, in the case of a hydrogen separator used at a high temperature (for example, 450 ° C. or higher), a PdAg alloy is desirable.

As this hydrogen separation metal layer, a configuration in which a hydrogen separation metal is disposed on the surface of the support can be employed. For example, a hydrogen separation metal layer can be formed by filling the pores of a porous support with a hydrogen separation metal.
<Configuration of hydrogen separator>
As the hydrogen separator, one or more hydrogen separators are disposed in a reactor (on one side of the wall member), and one or more hydrogen separators are disposed in a recovery vessel (on the other side of the wall member). A device provided with a fixing mechanism can be adopted.

  Examples of the reactor and the recovery container include metal containers made of SUS316, SUS316L, or the like.

Below, the Example of the hydrogen separator which selectively isolate | separates hydrogen from source gas is demonstrated.
a) First, the schematic configuration of the hydrogen separator according to this embodiment will be described.

  As shown in FIG. 1, the hydrogen separator 1 of this embodiment selectively separates hydrogen from a raw material gas (for example, a reformed gas that has been natural gas reformed (hydrogen-rich) and hydrogen-rich). Thus, the apparatus can obtain high-purity hydrogen.

  The hydrogen separation apparatus 1 includes, as a basic configuration, a plate-like wall member 3, a box-shaped reactor 5 provided on one side of the wall member 3 (downward in the figure), and the other of the wall member 3. Box-shaped recovery container 7 provided on the side (upper side of the figure), a test tube-shaped hydrogen separator 9 for separating hydrogen from the source gas, and a fixing mechanism 11 for fixing the hydrogen separator 9 to the wall member 3. And a raw material supply unit 13 for supplying the raw material gas to the reactor 5 and a hydrogen gas discharge unit 15 for discharging the recovered hydrogen gas. Each configuration will be described below.

  As shown in FIG. 2, the wall member 3 is a rectangular plate material having a thickness of 5 mm made of, for example, SUS316, SUS316L, etc., and a plurality of (in the left and right directions in FIG. Here, four circular through holes 17 into which the base end sides (upper side of FIG. 2B) of the four hydrogen separators 9 are inserted are opened.

  The reactor 5 is a rectangular parallelepiped container made of, for example, SUS316, SUS316L, or the like. Inside the reactor, four hydrogen separators 9 are arranged in a line along the longitudinal direction. That is, the reactor 5 is arranged so as to cover the periphery of the front end side of the hydrogen separator 9 (airtight). The reactor 5 is integrally joined to the wall member 3 by, for example, welding or brazing.

  The collection container 7 is a rectangular parallelepiped container made of, for example, SUS316, SUS316L, or the like, and the fixing mechanisms 11 are arranged in four locations along the longitudinal direction. That is, the collection container 7 is arranged so as to cover the periphery of the fixing mechanism 11 (airtight). The collection container 7 is integrally joined to the wall member 3 by, for example, welding or brazing.

  As shown in FIG. 3, the hydrogen separator 9 is mainly made of porous ceramics (YSZ) on the closed tip side (upper side in the figure), and is a test tubular hydrogen separator having a function of separating hydrogen. A portion 21 is provided, and a cylindrical dense portion 23 made of dense ceramic (YSZ) having no gas permeability and high strength is provided on the opened proximal end side (lower side in the figure). . Each configuration will be described below.

The dense portion 23 is a cylindrical ceramic body that is sufficiently dense to prevent gas permeation and has a strength higher than that of the hydrogen separation portion 21.
The hydrogen separation part 21 is a member that selectively separates hydrogen from the gas introduced from the outer peripheral side thereof and supplies the hydrogen to the central hole 25 at the axial center of the hydrogen separation part 21.

  As shown in an enlarged view in FIG. 4, the hydrogen separator 21 is integrally formed from a test tubular porous portion 29 whose one end is closed and a porous layer 31 covering the outer surface of the porous portion 29. Has been. A ceramic support 33 (see FIG. 3) is constituted by the dense portion 23 and the porous portion 29.

  Among these, the porous part 29 is a support body that has a role of supporting the porous layer 31 while having air permeability. The porous part 29 has a porosity of 40%, for example, and has a structure capable of transmitting gas (hydrogen).

  The porous layer 31 is a coating layer made of porous ceramics and has a structure through which gas can permeate. Specifically, the porous layer 31 includes a first porous layer 34 that covers the outer surface of the porous portion 29, a second porous layer 35 that covers the outer surface of the first porous layer 34, and a second porous layer. And a porous protective layer 37 covering the outer surface of 35.

The first and second porous layers 34 and 35 have a similar porous structure, and this ceramic portion is referred to as an inner porous layer 36.
In particular, the pores of the second porous layer 35 are filled with a hydrogen permeable metal such as Pd. This hydrogen permeable metal is a metal that separates hydrogen from the source gas by selecting and allowing only hydrogen from the source gas to permeate.

That is, the portion inside the second porous layer 35 that is filled with the hydrogen permeable metal and covers the entire outside of the first porous layer 34 in a layered manner is the hydrogen separation metal layer (hydrogen permeable membrane) 39.
b) Next, the fixing mechanism 11 which is a main part of the present embodiment will be described.

  As shown in FIG. 5 (b), the hydrogen separator 9 has a base end side inserted into the through hole 17 of the wall member 3, and a protruding portion in the collection container 7 through the wall member 3 ( It is fixed to the wall member 3 by the fixing mechanism 11 at the protruding portion 41.

Since the dense portion 23 is provided on the base end side of the hydrogen separator 9, a part of the dense portion 23 is a protruding portion 41.
The fixing mechanism 11 is provided integrally with the wall member 3 on the collection container 7 side (upper side in the figure) of the wall member 3, and includes a cylindrical wall member fixing portion 43 surrounding the outer peripheral side of the protruding portion 41, and a wall A cylindrical outer fixing portion (clamping fitting) 45 that is screwed into the member fixing portion 43 from the outside is provided, and between the hydrogen separator 9 and the wall member fixing portion 43 (from the wall member 3 side). An annular first seal member 47, an annular glass member 49, an annular second seal member 51, and an annular pressing member 53 are provided.

  Among these, the said wall member fixing | fixed part 43 consists of SUS316, SUS316L, etc., for example, is joined to the wall member 3 by welding or brazing. That is, the wall member fixing portion 43 is provided so as to surround the opening 55 on the collection container 7 side of the through hole 17, and a screw portion 56 is provided on the outer peripheral surface thereof.

  The outer fixing portion 45 is a cap-shaped member made of SUS316, SUS316L, or the like, and includes a cylindrical portion 57 that is screwed into the wall member fixing portion 43 and a disk-shaped lid member 59. A screw portion 61 that is screwed into the wall member fixing portion 43 is provided on the inner peripheral surface of the cylindrical portion 57, and a vent hole 63 (from which hydrogen gas is discharged) is provided at the axial center of the lid member 59. ing.

  Further, as shown in FIG. 5A, a pair of fitting holes 65 that are symmetrical in the radial direction about the axis center are provided on the outer surface of the lid member 59. The fitting hole 65 is used for fitting a pair of protrusions 69 (see FIG. 6) of the fixing tool 67, which will be described later, and screwing the outer fixing portion 45.

  The first seal member 47 and the second seal member 51 are ring packings made of expanded graphite, the glass member 49 is made of borosilicate glass or the like, and the presser member 53 is a presser made of SUS316, SUS316L or the like. It is a ring.

c) Next, a method for manufacturing the hydrogen separator 1 of this embodiment will be described.
As shown in FIG. 6, first, the hydrogen separator 9 is fixed to the wall member 3 by the fixing mechanism 11.
Specifically, the dense portion 23 on the proximal end side of the hydrogen separator 9 is inserted into the through hole 17 of the wall member 3, and the dense portion 23 is disposed in the through hole 68 of the wall member fixing portion 43.

  In this state, the first seal member 47, the glass member 49, the second seal member 51, and the pressing member 53 are sequentially fitted into the gap 70 between the dense portion 23 and the wall member fixing portion 43. At this time, the upper portion of the pressing member 53 protrudes from the upper end of the wall member fixing portion 43.

  Next, the outer fixing portion 45 is fitted into the wall member fixing portion 43 and screwed. At the time of this screw tightening, the protrusion 69 of the fixed tool 67 is fitted into the fitting hole 65 of the outer fixed portion 45, and the fixed tool 67 is turned and tightened.

  By this tightening operation, the pressing member 53 is pressed downward (by the lid member 59) in the figure, so that the first seal member 47, the glass member 49, and the second seal member 51 are also pressed downward.

  By this pressing, the first seal member 47 and the second seal member 51 (made of expanded graphite) spread in the radial direction, and the dense portion 23 of the hydrogen separator 9 is tightened from the periphery. Gas sealing is performed at the same time.

Thereby, the hydrogen separator 9 is fixed to the wall member 3.
Thereafter, the reactor 5 is joined to one side of the wall member 3 (downward in the figure) by welding or the like, and the recovery container 7 is joined to the other side of the wall member 3 (upward in the figure) by welding or the like. Then, the hydrogen separator 1 is completed.

  Therefore, in the hydrogen separator 1 configured as described above, as shown in FIG. 1, the raw material gas (for example, reformed gas containing hydrogen) is supplied into the reactor 5 from the raw material supply unit 13. Then, hydrogen is separated from the source gas by the hydrogen separation metal layer 39 of the hydrogen separator 9 and discharged into the center hole 25, and this hydrogen is further discharged from the center hole 25 of the hydrogen separator 9 into the recovery container 7. And is taken out from the hydrogen gas discharge unit 15 to the outside.

d) Next, the effect of the present embodiment will be described.
In the hydrogen separator 1 of the present embodiment, the hydrogen separator 9 is fixed to the wall member 3 by the fixing mechanism 11 at a portion 41 protruding from the through hole 17 of the wall member 3. Specifically, when the outer fixing portion 45 is screwed into the wall member fixing portion 43, the first and second sealing members 47 and 51 made of expanded graphite are pressed (via the pressing member 53 and the like). The first and second seal members 47 and 51 spread in the radial direction, and the dense portion 23 that is the protruding portion 41 of the hydrogen separator 9 is tightened. Thereby, the hydrogen separator 9 is fixed to the wall member 3.

  That is, in this embodiment, the base end side of the hydrogen separator 9 is disposed through the wall member 3 and the protruding portion 41 is fixed by the fixing mechanism 11, so that the reactor 5 which is a part of the hydrogen separator 1 is used. Can be made compact, and as a result, the entire apparatus can be made compact. Moreover, the thickness of the wall member 3 can be reduced as compared with the conventional case, and the configuration of the wall member 3 can be simplified.

  In addition, the reactor 5 is a pressure vessel. By making the reactor 5 compact, the amount of heat for heating can be reduced, and the wall thickness of the vessel can be reduced, so that it is very economical. Play.

Furthermore, the attachment of the hydrogen separator 9 is facilitated and the workability is improved, so that the possibility of damage to the hydrogen separator 9 can be reduced.
Further, in the present embodiment, since the fitting hole 65 is provided on the outer surface in the axial direction of the outer fixing portion 45, by fitting the protrusion 69 of the fixing tool 67 in the fitting hole 65 along the axial direction, Even when the surrounding space for tightening is narrow, the outer fixing portion 45 can be easily rotated.

  Therefore, even when a large number of fixing mechanisms 11 (and hence the hydrogen separator 9) are arranged close to each other, screwing can be easily performed, so that the hydrogen separator 9 can be arranged close to it, and from that point, The hydrogen separator 1 can be made more compact.

  For example, as shown in FIG. 7, since a large number of fixing mechanisms 11 (and hence the hydrogen separators 9) can be arranged close to each other in, for example, two rows, the hydrogen separator 1 can be made compact.

Next, the second embodiment will be described, but the description of the same contents as the first embodiment will be omitted.
In this embodiment, the shape of the outer fixing portion of the fixing mechanism is different from that of the first embodiment.
Specifically, as shown in FIG. 8A, in this embodiment, a long hole-shaped fitting hole 85 is provided at the center of the outer surface of the lid member 83 of the outer fixing portion 81. The fitting hole 85 also serves as a vent hole.

In this case, as shown in FIG. 8B, a fixing tool 89 having a projection 87 corresponding to the shape of the long hole is used.
This embodiment also has the same effect as that of the first embodiment.

Next, the third embodiment will be described, but the description of the same contents as the first embodiment will be omitted.
In this embodiment, the shape of the outer fixing portion of the fixing mechanism is different from that of the first embodiment.
Specifically, as shown in FIG. 9A, in this embodiment, a hexagonal fitting hole 95 is provided at the center of the outer surface of the lid member 93 of the outer fixing portion 91. The fitting hole 95 also serves as a vent hole.

In this case, it can fix using a well-known hexagon stick spanner (not shown).
This embodiment also has the same effect as that of the first embodiment.

Next, the fourth embodiment will be described, but the description of the same contents as the first embodiment will be omitted.
In this embodiment, the shape of the outer fixing portion of the fixing mechanism is different from that of the first embodiment.
Specifically, as shown in FIG. 9B, in this embodiment, the outer shape of the lid member 103 of the outer fixing portion 101 is a hexagonal shape. A vent hole 105 is provided in the center of the lid member 103.

In this case, it can be fixed by using a known plug wrench (not shown) having a hexagonal hole (on the tip side).
This embodiment also has the same effect as that of the first embodiment.

In addition, this invention is not limited to the said embodiment and Example at all, and it cannot be overemphasized that it can implement with a various aspect in the range which does not deviate from this invention.
For example, after sealing the reactor to the wall member by welding or brazing, the hydrogen separator can be clamped and fixed by a fixing mechanism. In this case, the hydrogen separation metal layer (hydrogen permeable membrane) of the hydrogen separator is not damaged by fumes during welding. Further, the hydrogen separation metal layer is not damaged by the brazing temperature.

DESCRIPTION OF SYMBOLS 1 ... Hydrogen separator 3 ... Wall member 5 ... Reactor 9 ... Hydrogen separator 11 ... Fixing mechanism 17, 68 ... Through-hole 41 ... Projection part 43 ... Wall member fixing | fixed part,
45, 81, 91, 101 ... outer fixing part,
47, 51 ... Seal members (first seal member, second seal member)
53 ... Holding member 65, 85, 95 ... Fitting hole 67, 89 ... Fixing tool

Claims (5)

A hydrogen separator in which a cylindrical hydrogen separator that allows only hydrogen to pass through is accommodated in a reactor, and one end portion in the axial direction of the hydrogen separator is fixed to a wall member constituting the wall surface of the reactor In
The wall member has a through hole into which one end of the hydrogen separator is inserted,
The one end of the hydrogen separator passes through the through hole of the wall member and protrudes to the outside of the wall member, and is fixed to the wall member by a fixing mechanism.
The fixing mechanism is
A cylindrical wall member fixing portion provided integrally with the wall member on the outside of the wall member and surrounding an outer peripheral side of the protruding portion;
A cylindrical outer fixing portion screwed into the wall member fixing portion;
A seal member disposed on the outer peripheral side of the hydrogen separator and pressed by the outer fixing portion to clamp the hydrogen separator and fix it to the wall member;
A hydrogen separator characterized by comprising:   The fixing mechanism is configured to fix the hydrogen separator to the wall member by screwing the outer fixing portion so that at least a part of the seal member is compressed and spread in a radial direction. Item 2. The hydrogen separator according to Item 1.   The hydrogen separator according to claim 2, further comprising a pressing member that presses the sealing member between the sealing member and the outer fixing portion.   3. A fitting hole for receiving a turning force from the tool while fitting a tool for rotating the outer fixing portion on the outer surface in the axial direction of the outer fixing portion. 3. The hydrogen separator according to 3.   The hydrogen separation apparatus according to claim 2, wherein the outer fixing portion has a cylindrical shape.

Images