Packingless hydrogen purification system

Abstract

This invention provides a gasketless hydrogen purification apparatus that maintains airtightness without the use of gaskets, is inexpensive, easy to assemble, and does not require any consideration of material type. [Solution] The device comprises a circular hydrogen permeable membrane 1, a base 2 on which the hydrogen permeable membrane 1 rests, and a lid 3 that engages with the base 2. By applying pressure with the hydrogen permeable membrane 1 sandwiched between the base 2, the edges of the hydrogen permeable membrane 1 are compressed and molded to form a single unit. The base 2 has a circular recess 21 in the center, and a peripheral wall 23 is formed continuously with the edge 22 of the recess 21. The edge portion 24 at the end of the peripheral wall 23 is in contact with a substantially vertical cliff-like portion 25, the other end of the cliff-like portion 25 is in contact with an inclined portion 26, and the other end of the inclined portion 26 is in contact with a horizontal portion 27. An annular projection 31 that can contact the edges of the hydrogen permeable membrane 1 is formed on the contact surface side of the lid 3 with the base 2, at a position further outward than the peripheral wall 23.

Description

Technical Field

[0001] The present invention relates to a packingless hydrogen purification apparatus.

Background Art

[0002] In Patent Document 1, when separating hydrogen from a mixed gas containing hydrogen, in order to improve airtightness, a hydrogen permeable membrane for separating the hydrogen from the mixed gas containing hydrogen, a support in which a recess for housing the hydrogen permeable membrane is formed, and a hollow frame body that is press-fitted into the recess in which the hydrogen permeable membrane is housed and holds the edge of the hydrogen permeable membrane are provided. A hydrogen separation apparatus including a hydrogen permeable membrane, a stainless steel fiber body, a metal gasket, a punching plate, a support, and a frame body is described.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The hydrogen separation apparatus described in Patent Document 1 needs to use packing such as a metal gasket to maintain airtightness. Therefore, the cost of the packing is high, and when arranging the packing during assembly, it is necessary to carefully perform the assembly work so that the position does not shift.

[0005] In addition, depending on the composition of the raw material gas, the packing may be affected and become vulnerable, resulting in problems with airtightness. Therefore, it was necessary to adopt packing made of a material corresponding to the composition of the raw material gas. [[ID=RO]]

[0006] Therefore, the problem that the present invention aims to solve is to provide a packingless hydrogen purification apparatus that maintains airtightness without using packing, is inexpensive, easy to assemble, and does not require any consideration of material. [Means for solving the problem]

[0007] The means for solving the problems of the present invention are as follows.

[0008] Firstly, A hydrogen separation apparatus comprising a hydrogen permeable membrane, a base on which the hydrogen permeable membrane rests, and a lid that engages with the base, wherein pressure is applied with the hydrogen permeable membrane sandwiched between the lid and the edges of the hydrogen permeable membrane are compressed and molded to form a single unit, The base has a recess in the center, and a peripheral wall is formed continuously around the edge of the recess. The surrounding wall This is the end portion located on the opposite side from the edge of the recess. edge to, cliff-like part but They are in contact, The cliff-like portion At the lower end Slope but They are in contact, The inclined portion The end opposite to the aforementioned cliff-like section is, It is in contact with the horizontal section, The cliff-like portion extends substantially perpendicular to the horizontal portion, The inclined portion has an inclination angle α of 0 to 30 degrees, preferably 10 to 20 degrees, with respect to the horizontal portion. A packingless hydrogen permeation device characterized in that an annular projection capable of contacting the edge of the hydrogen permeable membrane is formed on the contact surface side of the lid with the base, at a position on the outer circumference relative to the peripheral wall.

[0009] Secondly, 1 A packingless hydrogen permeation apparatus as described above, The hydrogen permeable membrane is pressed by the annular projection of the lid, The aforementioned When the edge bends downwards, using the edge as a pivot point, the edge of the hydrogen permeable membrane comes into contact with the boundary between the inclined and horizontal parts of the base. The aforementioned Edge and The aforementioned Using the boundary point as a pivot point, further The aforementioned A packingless hydrogen permeation device characterized by being pressed by an annular projection.。

[0010] Here, "compression molding" means molding by applying pressure in a state where a hydrogen permeable membrane is sandwiched, considering the "base" and the "lid" as molds.

Advantages of the Invention

[0011] According to the present invention, the following effects can be achieved.

[0012] Since the edge of the hydrogen permeable metal functions as a packing, airtightness is maintained without using a packing, the cost is low, the assembly work is easy, and there is no need to worry about the material.

Brief Description of the Drawings

[0013] [Figure 1] It is an overall explanatory view of the packingless hydrogen permeation device of the present invention. [Figure 2] It is an explanatory view of the main part of the packingless hydrogen permeation device of the present invention.

Modes for Carrying Out the Invention

[0014] Hereinafter, modes for carrying out the present invention will be specifically described while referring to the drawings. Here, the same members in the attached drawings are denoted by the same reference numerals, and redundant explanations are omitted. Note that since the description here is one mode in which the present invention is implemented, the present invention is not limited to this mode.

Examples

[0015] [Overall]

[0016] As shown in FIG. 1, the packingless hydrogen permeation device of this example has a circular hydrogen permeable membrane 1, a base 2 on which the hydrogen permeable membrane 1 is placed, and a lid 3 combined with the base 2.

[0017] This packingless hydrogen permeation device works by applying pressure to the contact area with the hydrogen permeable membrane 1 by tightening a combination of long-axis bolts and nuts into through-holes provided through the base 2 and lid 3 (not shown in the diagram) with the hydrogen permeable membrane 1 in between, thereby compressing and integrating the edges of the hydrogen permeable membrane 1.

[0018] Although detailed illustrations are omitted, the packingless hydrogen permeation apparatus of this embodiment includes a means for supplying and ejecting hydrogen-containing raw material gas, a means for recovering purified gas by the hydrogen permeation membrane 1, and a means for recovering bleed gas.

[0019] [Base]

[0020] The base 2 is a short cylindrical shape and, as shown in Figure 1, has a circular recess 21 in the center created by machining.

[0021] A peripheral wall 23 is continuously formed on the edge 22 of the circular recess 21.

[0022] The surrounding wall 23 This is the end portion located on the opposite side of the edge 22 of the recess 21. The edge portion 24 is ,cliff It is in contact with the shaped portion 25. The cliff-like portion 25 extends approximately perpendicular to the horizontal portion 27 (see Figure 2(a)).

[0023] Lower side of the cliff-like portion 25 At the end, relative to the horizontal section 27 Inclined portion 26 having an inclination angle α of 15 degrees (see Figure 2(a)) but They are in contact.

[0024] The inclined portion 26 The end opposite to the cliff-like portion 25 It is in contact with the horizontal section 27.

[0025] [lid]

[0026] The lid 3 is a short cylindrical shape, manufactured by cutting, and as shown in Figure 1, an annular projection 31 capable of contacting the edge of the hydrogen permeable membrane 1 is formed on the contact surface side with the base 2, at a position further outward than the peripheral wall 23.

[0027] Since the annular projection 31 has a semicircular cross-section and protrudes in a hemispherical shape, when it contacts and presses against the hydrogen permeable membrane 1, the contact point with the gradually inclined hydrogen permeable membrane 1 shifts slightly, preventing stress from concentrating at a single point of contact and thus preventing the hydrogen permeable membrane 1 from rupturing.

[0028] [Hydrogen permeable membrane]

[0029] The size of the hydrogen permeable membrane 1 is such that when the hydrogen permeable membrane 1 is pressed by the annular projection 31 of the lid 3 and bends downward with the edge portion 24 as a fulcrum, the edge of the hydrogen permeable membrane 1 is in contact with the boundary point P between the inclined portion 26 and the horizontal portion 27 of the base 2.

[0030] The size of the hydrogen permeable membrane 1 can be such that when it is bent downwards, it remains in contact with the inclined portion 26 without reaching the boundary point P, or it can be such that it extends beyond the boundary point P and contacts the horizontal portion 27.

[0031] In this case, if the edge of the hydrogen permeable membrane 1 is in contact with boundary point P, its position will be restricted at that point.

[0032] [Effect]

[0033] Next, the operation of the packingless hydrogen permeation device of this embodiment will be explained.

[0034] After placing the hydrogen permeable membrane 1 on the base 2, the lid 3 is placed over it, and a long-shaft bolt and nut are fastened together through a through-hole provided between the base 2 and the lid 3 (not shown in the diagram).

[0035] This tightening gradually narrows the gap between the base 2 and the lid 3, and as shown in Figure 2(a), the tip of the annular projection 31 of the lid 3 comes into contact with the edge of the hydrogen permeable membrane 1.

[0036] By tightening it further, as shown in Figure 2(b), the tip of the annular projection 31 of the lid 3 pushes against the edge of the hydrogen permeable membrane 1, and bends downward with the contact point with the edge portion 24 as a fulcrum.

[0037] The bent edge of the hydrogen permeable membrane 1 contacts the boundary point P, as shown in (c) in Figure 2, and its position is restricted.

[0038] By tightening further in this state, as shown in Figure 2(d), the contact point of the annular projection 31 with the hydrogen permeable membrane 1 is pressed in, with the point where the edge portion 24, the inclined portion 26, and the membrane end portion come into contact acting as a fulcrum.

[0039] As a result, the edges of the hydrogen permeable membrane 1 are compression-molded to maintain high airtightness, and the entire structure becomes integrated. [Explanation of Symbols]

[0040] 1. Hydrogen permeable membrane 2 bases 21 Recess 22 Edge 23 Peripheral wall 24 Edge section 25 Cliff-like part 26 Slope 27 Horizontal part 3 Lid 31. Annular projection P boundary point

Claims

1. A hydrogen separation apparatus comprising a hydrogen permeable membrane, a base on which the hydrogen permeable membrane rests, and a lid that engages with the base, wherein pressure is applied with the hydrogen permeable membrane sandwiched between the lid and the edges of the hydrogen permeable membrane are compressed and molded to form a single unit, The base has a recess in the center, and a peripheral wall is formed continuously around the edge of the recess. The cliff-like portion is in contact with the edge portion of the peripheral wall, which is the end portion located on the opposite side of the edge of the recess. The lower end of the cliff-like section is in contact with a sloping section. The end of the sloping section opposite to the cliff-like portion is in contact with the horizontal section. The cliff-like portion extends substantially perpendicular to the horizontal portion, The inclined portion has an inclination angle α of 0 to 30 degrees with respect to the horizontal portion. A packingless hydrogen permeation device characterized in that an annular projection capable of contacting the edge of the hydrogen permeable membrane is formed on the contact surface side of the lid with the base, at a position on the outer circumference relative to the peripheral wall.

2. A packingless hydrogen permeation apparatus according to claim 1, A packingless hydrogen permeation device characterized in that when the hydrogen permeable membrane is pressed by the annular projection of the lid, it bends downward with the edge portion as a fulcrum, and the edge of the hydrogen permeable membrane comes into contact with the boundary point between the inclined portion and the horizontal portion of the base, and is further pressed by the annular projection with the edge portion and the boundary point as fulcrums.

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