JPH0535272B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a hydrogen compression device using a metal hydride.

<Conventional technology> Hydrogen storage alloys based on rare earths, titanium, magnesium, and other metals, or metal hydrides called metal hydrides, undergo a hydrogenation reaction and quickly generate heat. It is known that these metal hydrides undergo a reversible dehydrogenation reaction and endothermically release hydrogen.

This chemical reaction formula is shown by the following formula.

M+n/2H ₂ MH _o +ΔH M: Hydrogen storage alloy ΔH: Heat of reaction MH _o : Metal hydride However, once a hydrogenation reaction occurs and a metal hydride is formed, it completely returns to its original alloy state. is very difficult, so it may be expressed by the following equation.

MH _(n+o) MH _n +n/2P ₂ ±ΔH That is, m represents a hydrogen atom that always combines with a hydrogen storage alloy to form a metal hydride,
In practical terms, n represents hydrogen that can be extracted from the alloy that has become a metal hydride.

In this specification, the above-mentioned M, MH _o ,
MH _(n+o) , MH _n are collectively called metal hydrides,
It is simply indicated by the symbol M.

The hydrogen equilibrium decomposition pressure P of these metal hydrides is generally a function of the temperature T, and as shown in FIG. 15, the higher the temperature, the higher the hydrogen equilibrium decomposition pressure. Therefore, it is possible to obtain hydrogen with a high equilibrium decomposition pressure by storing hydrogen with a low equilibrium decomposition pressure in a metal hydride at a relatively low temperature and then releasing hydrogen from the metal hydride at a high temperature. I can do it. Various hydrogen compression devices have been proposed utilizing such properties of metal hydrides.

For example, in Japanese Patent Application Laid-open No. 57-92690, a metal hydride is transferred from one end of a sealed cylinder to the other end using a screw, and a low-temperature heat exchange section provided along the transfer direction and a high-temperature heat exchange section are disclosed. A device has been proposed in which the parts are passed sequentially. According to this device, after passing through a low-temperature heat exchange section, low-pressure hydrogen supplied from the outside is stored in a metal hydride, and then this metal hydride that has stored hydrogen is transferred to a high-temperature heat exchanger in the same cylinder. It can be transferred by screw to the exchange section and the hydrogen can be released at a high equilibrium decomposition pressure at this temperature, thereby functioning as a hydrogen compressor.

<Problems to be Solved by the Invention> In this type of device, each heat exchange section must be pressure-blocked to maintain a predetermined pressure. However, in the conventional apparatus as described above, each heat exchange section must be pressure-blocked while the solid metal hydride is transferred by the screw means, so there is a problem with the sealing performance of pressure-blocking. The disadvantage is that mechanical troubles such as screws are likely to occur.

SUMMARY OF THE INVENTION Therefore, the present invention has been made for the purpose of solving the above-mentioned drawbacks and providing a hydrogen compression device using metal hydride, which can reliably shut off each heat exchange section in terms of pressure and is less likely to cause mechanical troubles. It is something that

<Means for Solving the Problems> In other words, the hydrogen compression device of the present invention comprises a rotating body in which a plurality of closed containers filled with metal hydride are arranged in a radial direction with respect to a rotating shaft; A low-temperature heat medium chamber and a high-pressure heat medium chamber are arranged around the rotating body so that each sealed container passes through the low-temperature heat medium chamber and the high-pressure heat medium chamber alternately and sequentially as the body rotates; It consists of a low-pressure hydrogen supply port and a high-pressure hydrogen outlet provided nearby, and a hydrogen conduit that connects each sealed container to the low-pressure hydrogen supply port or high-pressure hydrogen outlet, and each hydrogen conduit and the low-pressure hydrogen supply port or high-pressure hydrogen outlet. The above-mentioned connection is such that the hydrogen conduit extending from one sealed container communicates only with the low-pressure hydrogen supply port when the air is in the low-temperature heating medium chamber, and the hydrogen conduit extending from this sealed container communicates only with the low-pressure hydrogen supply port when this sealed container is in the high-temperature heating medium chamber. Each hydrogen pipe is sequentially communicated with or cut off from the low-pressure hydrogen supply port and the high-pressure hydrogen outlet as the rotating body rotates, so that the extending hydrogen pipe communicates only with the high-pressure hydrogen outlet. be.

In another embodiment of the present invention, the hydrogen compression apparatus having the structure described above is used as one unit, and a plurality of the units are connected such that the high-pressure hydrogen outlet of each unit is connected to the low-pressure hydrogen supply port of the next stage. A multi-stage hydrogen compression device is provided in which the following steps are sequentially connected. At this time, the order in which the units are connected is such that as the stages advance, the hydrogen equilibrium decomposition pressure of the metal hydride contained in the unit gradually shifts to a higher temperature range.

<Examples> The present invention will be described in detail below with reference to examples shown in the drawings.

FIG. 1 is an explanatory diagram schematically showing one embodiment of the hydrogen compression apparatus of the present invention, in which three disc-shaped rotating bodies 1a, 1b, 1c are fixed to a rotating shaft 2,
This rotating shaft is supported by a bearing 3, and the rotating shaft 2
The rotating body can also rotate as the body rotates. Although three rotating bodies are used in this embodiment, even one rotating body can function as a hydrogen compression device.

As shown in the side view of FIG. 2, each rotating body 1 includes a partition wall 4, an annular wall 5,
The interior is divided into four chambers by 5, and each chamber forms one airtight container 6. The number of airtight containers 6 formed in each rotating body 1 does not necessarily have to be four, and any number of airtight containers 6, preferably three or more, can be formed.

Note that it is preferable that the partition wall 4 of each closed container 6 be a heat insulating wall using a heat insulating material, since the influence of heat transfer between the closed containers 6 can be prevented. Furthermore, the present invention incorporates conventional rotary heat exchanger technology in which means for enlarging the heat transfer surface such as heat transfer fins and heat transfer means such as heat pipes are provided on the inside and outside of each airtight container. can be used.

A metal hydride M is filled in the closed container 6 on each rotating body. In addition, each airtight container 6
A hydrogen conduit 7 is drawn out from each of the rotating bodies 1.
The three hydrogen conduits a, 1b, and 1c of the closed containers located at the same position in the radial direction are combined into one hydrogen conduit 8, which extends to one end of the rotating shaft.
Although only two combined hydrogen conduits are shown in FIG. 1, since each rotating body is provided with four sealed containers 6, the total of four combined hydrogen conduits extend to one end of the rotating shaft. There is. Note that it is preferable that the metal hydrides M filled in the closed container 6 are the same type of metal hydride M in the closed containers 6 that communicate with each other via the combined hydrogen conduit 8.
If the hydrogenation reaction occurs in the low-temperature heating medium chamber 15 and the dehydrogenation reaction occurs in the high-temperature heating medium chamber 14, which will be described later,
It does not have to be of the same type. Also metal hydride M
may be made into fine particles by repeating hydrogenation and dehydrogenation reactions. In such a case, a filter (not shown) such as a laminated metal net may be attached to the opening of the hydrogen conduit in the closed container 6 to prevent fine particles of metal hydride from flowing into the hydrogen conduit 7.
Further, the combined hydrogen conduit 8 can also be installed along the outer peripheral surface of the rotating shaft, but as shown in the figure, the combined hydrogen conduit 8 can extend along the outer peripheral surface of the rotating shaft
It is also possible to make it hollow and pass the combined hydrogen conduit inside it.

A low-pressure hydrogen supply port 9 and a high-pressure hydrogen outlet 10 are provided at one end of the rotating shaft 2 to communicate with or disconnect from each closed container 6 individually via the hydrogen conduit 7 and the combined hydrogen conduit 8 as the rotating shaft 2 rotates. is provided.

That is, as shown in FIGS. 3A and B,
The tip of the hollow rotating shaft 2 is closed with an end plate 20, and the hollow part of the rotating shaft near this tip is partitioned by a tube plate 22 attached by a flange 21.
Each combined hydrogen conduit 8 is opened at. End plate 20
Around the rotating shaft circumferential wall 23 between and the tube plate 22,
An annular member 24 in which a low-pressure hydrogen supply port 9 and a high-pressure hydrogen outlet 10 are opened is fixed at a predetermined location, and a solid central shaft 25 is provided in the hollow part of the rotating shaft 2 between the end plate 20 and the tubular member 22. do. This central axis 2
5 and the rotating shaft peripheral wall 23, four closed containers 6 of each rotating body 1 are separated by four partition members 26 arranged radially from the central axis 25. Four cavities 27 corresponding to are formed,
A combined hydrogen conduit 8 from each closed vessel communicates with each cavity 27 at an opening in tube sheet 22 . Furthermore, openings 28 communicating with each cavity 27 are formed in the rotating shaft peripheral wall 23 . In addition, reference number 29 is the annular member 2
4, each combined hydrogen conduit 8 connects to a low pressure hydrogen supply port 9 through a cavity 27 and an opening 28.
It also adjusts the time and timing of communication with each inlet and outlet of the high-pressure hydrogen outlet 10. Thus, as the rotating shaft 2 rotates, the peripheral wall 23 slides and rotates on the inner peripheral surface of the member 29, and each combined hydrogen conduit 8 is connected to the low pressure hydrogen supply port 9 through the cavity 27 and the opening 28.
The cycle of communication and cutoff with the high-pressure hydrogen outlet 10 is repeated.

Note that the reference number 24a represents a sealing material provided at the sliding edge of the rotating shaft peripheral wall 23 and the annular member 24.

Rotating body 1 assembled integrally as above
a, 1b, 1c and the rotating shaft 2 are surrounded by an outer duct 12 as shown in FIG.
3 into two duct parts.

The partition wall 13 connects the rotating shaft 2 and the rotating bodies 1a, 1
It is provided with a slight gap between the parts b and 1c so as not to hinder the rotation of parts b and 1c. In this case, if the rotating shaft 2 is made hollow as shown in the figure, and the hydrogen conduit 7 and the combined hydrogen conduit 8 are passed through the rotating shaft, the gap between the rotating shaft 2 and the partition wall 13 can be reduced, and each duct section It is possible to improve the sealing performance between the two. In this way, by flowing a high-temperature heat medium or a low-temperature heat medium through each duct, a high-temperature heat medium chamber 14 is formed on one side of the rotating shaft 2, for example, on the upper side, and a low-temperature heat medium is formed on the other side of the rotating shaft 2, for example, on the lower side. A heat medium chamber 15 is formed. With such a configuration, as the rotating shaft 2 is rotated by an external drive source (not shown), the closed containers 6 of each rotating body can alternately and sequentially pass through the high temperature heat medium chamber 14 and the low temperature heat medium chamber 15. It is like that.

Note that the type of heat medium flowing into each of the heat medium chambers 14 and 15 is not particularly limited as long as it is a fluid, but gas is generally preferably used. Further, when a fluid heat medium is supplied to each heat medium chamber at substantially the same pressure, it is not necessary to strictly seal the heat medium chambers.

The operation of the hydrogen compression apparatus of the present invention having the above-mentioned configuration will be explained below. FIG. 4 is an explanatory diagram showing one of the rotating bodies arranged as shown in FIG. 1, and the same members as in FIG. 1 are given the same reference numerals, and the explanation thereof will be omitted. As described above, as the rotating shaft 2 rotates, each closed container 6 of the rotary body 1 changes position (inside the low-temperature heat medium chamber 15) → position (between the low-temperature heat medium chamber 15 and the high-temperature heat medium chamber 14) → position. (inside the high temperature heat medium chamber 14) → position (between the high temperature heat medium chamber 14 and the low temperature heat medium chamber 15) and rotates in the direction of the arrow in the figure.

Now, considering the case where one of the closed containers 6 is in the position, the hydrogen conduit 7 and the combined hydrogen conduit 8 extending from the closed container in this position communicate with the low-pressure hydrogen supply port 9 via the cavity 27 ( (See Figure 3). Low-pressure hydrogen gas as a raw material is introduced from the low-pressure hydrogen supply port 9 and is supplied to the closed container 6 located within the low-temperature heat medium chamber 15 via the cavity 27, the combined hydrogen conduit 8, and the hydrogen conduit 7. Here, the metal hydride in the closed container 6 stores low-pressure hydrogen gas while being cooled.

Next, when this sealed container rotates and comes to a position between the low-temperature heat medium chamber 15 and the high-temperature heat medium chamber 14, the hydrogen conduit 7 and the combined hydrogen conduit 8 extending from this closed container are connected to the low-pressure hydrogen supply port 9. and high pressure hydrogen outlet 1
The temperature of the metal hydride in the closed container increases as the metal hydride remains in a blocked state without communicating with any of the two.

Furthermore, this airtight container 6 rotates and the high temperature heat transfer medium chamber 1
4, the temperature of the metal hydride in the closed container increases further and releases hydrogen at a high equilibrium decomposition pressure at this temperature. In this position, the hydrogen conduit 7 and the combined hydrogen conduit 8 extending from the closed container are connected to the cavity 27 and the aperture 28 (FIG. 3).
The high-pressure hydrogen outlet 10 is in communication with the high-pressure hydrogen outlet 10, so that the hydrogen at a high equilibrium decomposition pressure released into the closed vessel 6 is taken out from the high-pressure hydrogen outlet 10.

When the sealed container 6 is further rotated to the position, the hydrogen conduit 7 and the combined hydrogen pipe 8 extending from the sealed container do not communicate with either the low-pressure hydrogen supply port 9 or the high-pressure hydrogen outlet 10, and are cut off. The metal hydride in the sealed container is gradually cooled and moved to another location.

As described above, while the four sealed containers rotate in the order of →→→→, the cycle of absorbing low-pressure hydrogen at low temperatures and releasing high-pressure hydrogen at high temperatures is repeated, thereby allowing the raw material to be released. High-pressure hydrogen gas can be extracted continuously from low-pressure hydrogen gas, and it functions as a hydrogen compression device.

In addition, metal hydrides that have absorbed hydrogen through a hydrogenation reaction are slightly heavier than metal hydrides that have released hydrogen through a dehydrogenation reaction. It is also possible to apply a rotational force to 1. That is, as shown in FIG. 5, a hydrogen absorption reaction of the metal hydride occurs in the closed container 6 of the rotating body 1 located at this position, and a hydrogen absorption reaction of the metal hydride occurs in the closed container 6 located at a position 180 degrees away from this. By determining the positions of the high-temperature heating medium chamber 14 and the low-temperature heating medium chamber 15 and the positions of the low-pressure hydrogen supply port 9 and the high-pressure hydrogen outlet 10 so that the hydrogen release reaction occurs, the metal hydride weight at the position can be reduced. A weight difference is created between the weight of the dehydrogenated metal hydride and the weight of the dehydrogenated metal hydride at the position, and due to this weight difference, a rotational force as shown by the arrow in the figure can be constantly applied to the rotating body. Thereby, an external drive source for the rotating shaft can be eliminated, or the external power for rotating the rotating shaft can be reduced.

As described above, each sealed container 6 of the rotating body, the low pressure hydrogen supply port 9 and the high pressure hydrogen outlet 10 are communicated with each other through the hydrogen conduit 7 and the combined hydrogen conduit 8, but these hydrogen conduits 7, 8 does not necessarily have to be in the shape of a tube separate from the rotating shaft 2; for example, as shown in FIGS. 6 to 8, it may be a cross-shaped partition member 40 extending in the longitudinal direction within the hollow rotating shaft 2.
The four flow paths 41 formed by the partition member 40 and the rotating shaft peripheral wall 23 can also be used as hydrogen conduits. In this case, each channel 41 is communicated with each closed container 6 via a conduit 42 . Also in this embodiment, as shown in FIG. 8, a low-pressure hydrogen supply port 9 and a high-pressure hydrogen outlet 10 are provided at one end of the rotating shaft 2 in substantially the same manner as in the embodiment shown in FIG. I can do it. In addition, the 6th
8, the same members as those in FIG. 3 are given the same reference numerals and their explanations will be omitted.

Metal hydrides have different hydrogen equilibrium decomposition pressure characteristics depending on their type. Therefore, by transferring hydrogen in multiple stages between metal hydrides with different hydrogen equilibrium decomposition pressure characteristics, it is possible to convert low-pressure hydrogen to high pressure even if the temperature rise in the high-pressure heating medium chamber and the low-temperature heating medium chamber is small. It is possible to convert FIG. 9 shows a multi-stage hydrogen compression apparatus which is another embodiment of the present invention designed using the above-mentioned principle. This device is
The hydrogen compression apparatus shown in FIG. 1 is used as one unit, and a plurality of these units are connected together. That is, in FIG. 9, n units are connected in sequence so that hydrogen from each high-pressure hydrogen outlet is guided to the low-pressure hydrogen outlet of the next unit. And the rotating bodies D ₁ to D _o of each unit
The closed containers of are filled with metal hydrides M ₁ to _{M o} having different hydrogen equilibrium decomposition pressure characteristics, and all the closed containers of the rotating body D _i are filled with metal hydrides M _i having the same hydrogen equilibrium decomposition pressure characteristics. is filled. At this time,
The hydrogen equilibrium decomposition pressure characteristics of each metal hydride are M ₁ ...
M _i-1 , Mi, M _i+1 , . . . M _o are selected in the order of high temperature range, and the heat medium temperatures T _H and T _L of the heat medium chamber of each unit are determined as shown. Low-pressure hydrogen is supplied to the rotating body Dn of such a multi-stage device, and the high-pressure hydrogen released from this is further supplied to the next stage of the rotating body, and in this way, the highest equilibrium decomposition pressure characteristic is obtained from the rotating body _D1 . Hydrogen can be obtained.

To further explain this using the graph in Figure 10,
Hydrogen pressurized from A to B with metal hydride M _i+1 is then pressurized from C to D with metal hydride Mi,
Furthermore, the pressure is increased from E to F with metal hydride M _i-1 . In this way, as the number of zigzag stages of hydrogen pressurization progresses, the pressure of hydrogen gradually becomes higher.

It should be noted that the heat medium temperatures T _H and T _L of each unit in the multi-stage compression device shown in FIG. 9 may not be the same temperature. Furthermore, although the illustrated device has the units arranged horizontally in parallel, they can also be arranged so that the rotational axis of each unit is common, or even stacked on top of each other along the flow direction of the heating medium. It's okay. In the case of a stacked arrangement, only two elongated heat medium chambers are required and the entire device can be made more compact.

The hydrogen compression device of the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. For example, a large number of partition walls 13 may be extended in the radial direction from the rotating shaft 2, and a plurality of pairs of high-temperature heat medium chambers and low-temperature heat medium chambers may be provided around the rotating shaft. Further, the rotating body does not necessarily have to be in the shape of a disk, but may be in the shape of a sphere or a polygon. Furthermore, the plurality of closed containers filled with metal hydrides are the rotating bodies 1a shown in the figure,
It is not necessary to have an integral structure like 1b and 1c,
It is sufficient if they are arranged so as to be radially scattered in the circumferential direction of the rotating shaft so as to be able to rotate together with the rotating shaft.

Further, as shown in FIG. 11, for example, a plurality of cylindrical sealed containers 60 filled with metal hydride are arranged in parallel to each other in a ring shape and mounted on an endless transfer line member 16 such as a chain or belt. The endless rotating member 61 is installed between a plurality of rotary gears 64 (corresponding to the rotating shaft of the embodiment shown in FIG. 1) arranged in the same manner as shown in FIG. In this way, a rotating body 62 can be formed. By arranging the high-temperature heat medium chambers 65 and the low-temperature heat medium chambers 66 alternately in the feeding direction of the endless rotation transfer line member 61, the device functions similarly to the apparatus of the embodiment shown in FIG. can be done.

In addition, in this embodiment, the low pressure hydrogen supply port 9
Or a hydrogen conduit 7 connected to the high-pressure hydrogen outlet 10
The cavity 27 in FIG.
can be connected to. Alternatively, as shown in FIGS. 12 to 14, the low-pressure hydrogen supply port 9 and the high-pressure hydrogen outlet 10 are arranged at predetermined intervals so that the cavity moves parallel to the endless rotation member 61.
A cylindrical annular member 67 which is repeatedly opened and has substantially the same shape as the feeding shape of the endless rotating member 61 is disposed on the side surface of the endless rotating member 61, and the inner space of this cylindrical annular member 67 is filled with the shape shown in FIG. A plurality of chambers 68 having cavities 69 corresponding to the cavities 27 are slidably arranged, and a hydrogen conduit 7 from each closed container 60 is provided.
By communicating with each chamber 68, each chamber 68 can be moved in parallel with each closed container 60 on the endless rotating member 61. This chamber 68 is formed with an opening 70 that communicates with the cavity 69, and as the endless rotation member 61 is fed, each hydrogen conduit 7 communicates with the low-pressure hydrogen supply port 9 through the cavity 69 and the opening 70. The cycle of shutting off; and communicating with and shutting off the high-pressure hydrogen outlet 10 is repeated.

In addition, reference number 71 in FIGS. 12 to 14
is a member constituting the cylindrical annular member 67, and adjusts the time and timing at which the low-pressure hydrogen supply port 9 and the high-pressure hydrogen outlet 10 and each hydrogen conduit 7 communicate with each other via the cavity 69 and the opening 70. It is something to do. Reference number 72 is a seal plate made of a flexible material that connects the surfaces of adjacent chambers 68 having openings 70, and slides into contact with member 71 of cylindrical annular member 67 to open low-pressure hydrogen supply port 9. It also serves to prevent short-circuiting of hydrogen flowing in and out at the high-pressure hydrogen outlet 10. Reference number 73 is a flexible connecting portion that connects the bottom surfaces of adjacent chambers 68, thereby connecting a plurality of chambers 6.
8 can be conveyed through the cylindrical annular member 67 as a single link. Further, reference numeral 74 indicates a slit bored in the longitudinal direction of the side surface of the cylindrical annular member 67, which allows each hydrogen conduit 7 to move while communicating with the chamber 68.

<Effects of the Invention> As explained above, according to the hydrogen compression apparatus of the present invention, the solid metal hydride itself is transferred to the location between the high temperature heat exchange section and the low temperature heat exchange section that should be pressure-blocked. Since the closed container filled with the metal hydride is rotated around the rotation axis without the need for a metal hydride, it is possible to provide a reliable pressure-blocking seal between the two heat exchange parts, and also to provide a means for transporting the metal hydride. Since no screw or the like is used, there is an advantage that mechanical troubles in the transfer means are less likely to occur.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing an embodiment of the hydrogen compression device of the present invention; Figure 2 is a side view of the rotating body in Figure 1; Figures 3A and B are the low-pressure hydrogen supply port and high-pressure hydrogen in Figure 1; A sectional view of the outlet; FIG. 4 is an explanatory diagram showing the operation of the device of the present invention; FIG. 5 is an explanatory diagram showing the operation of another embodiment of the device of the present invention; FIG. An explanatory diagram showing another embodiment; FIG. 7 is a sectional view taken along line AA in FIG. 6; FIG. 8 is a sectional view taken along line BB in FIG. An explanatory diagram of a multi-stage hydrogen compression device as an example; FIG. 10 is a graph for explaining the hydrogen equilibrium decomposition pressure characteristics of metal hydride used in the multi-stage hydrogen compression device of FIG. 9; FIG. 11 is a graph of the device of the present invention. An explanatory diagram showing yet another embodiment; Fig. 12 is the first
Cross-sectional view of the hydrogen inlet/outlet combined with the device shown in Figure 1; 1st
Figure 3 is a sectional view taken along the line C-C in Figure 12; Figure 14 is a cross-sectional view of Figure 1.
2 is a sectional view along line DD; and FIG. 15 is a graph showing hydrogen equilibrium decomposition pressure characteristics of general metal hydrides. 1,62... Rotating body, 2... Rotating shaft, 6,60
... Closed container, 7 ... Hydrogen conduit, 8 ... Combined hydrogen pipe, 9 ... Low pressure hydrogen supply port, 10 ... High pressure hydrogen outlet, 12 ... Outer duct, 13 ... Partition wall, 1
4, 65... High temperature heat medium chamber, 15, 66... Low temperature heat medium chamber, 64... Rotating gear.

Claims (1)

[Scope of Claims] 1. A rotating body including a plurality of sealed containers filled with metal hydrides arranged in a radial direction with respect to a rotating shaft, and as the rotating body rotates, each sealed container is heated with a low-temperature heat medium. a low-pressure heat medium chamber and a high-temperature heat medium chamber arranged around the rotating body so as to alternately pass through the chamber and the high-temperature heat medium chamber, and a low-pressure hydrogen supply port and a high-pressure hydrogen outlet provided near the rotary body. and a hydrogen conduit connecting each of the closed containers to the low-pressure hydrogen supply port or the high-pressure hydrogen outlet, and the connection between each of the hydrogen pipes and the low-pressure hydrogen supply port or high-pressure hydrogen outlet is such that one closed container is When the closed container is in the medium chamber, the hydrogen conduit extending from the closed container communicates only with the low-pressure hydrogen supply port, and when the closed container is in the high-temperature heating medium chamber, the hydrogen conduit extending from the closed container communicates only with the high-pressure hydrogen outlet. A hydrogen compression device characterized in that each hydrogen conduit is sequentially communicated with or cut off from a low-pressure hydrogen supply port and a high-pressure hydrogen outlet as the rotating body rotates. 2 The rotating shaft is hollow, and a hydrogen conduit from each sealed container is extended through the interior of the rotating shaft to one end of the rotating shaft, and connected to a low-pressure hydrogen supply port or a high-pressure hydrogen outlet provided at one end of the rotating shaft. A device according to claim 1, characterized in that: 3. A plurality of hydrogen compression units, each containing a metal hydride, are connected in sequence so that the high-pressure hydrogen outlet of each unit is connected to the low-pressure hydrogen supply port of the next unit, and the order of connecting each unit is as follows: A multi-stage hydrogen compression device arranged in such a manner that as the stages advance, the hydrogen equilibrium decomposition pressure of the metal hydride contained in the unit gradually becomes in a high temperature range, and each hydrogen compression unit is arranged so that the hydrogen equilibrium decomposition pressure of the metal hydride contained in the unit gradually becomes higher temperature range. A rotating body including a plurality of sealed containers arranged in a radial direction with respect to a rotating shaft, and each sealed container passing alternately and sequentially through a low-temperature heat medium chamber and a high-temperature heat medium chamber as the rotary body rotates. A low-pressure heat medium chamber and a high-temperature heat medium chamber arranged around the rotating body, a low-pressure hydrogen supply port and a high-pressure hydrogen outlet provided near the rotary body, and each closed container and the low-pressure hydrogen supply port or high-pressure hydrogen supply port. a hydrogen conduit connected to a hydrogen outlet, and the connection between each hydrogen conduit and a low-pressure hydrogen supply port or a high-pressure hydrogen outlet is such that when one closed container is in the low-temperature heating medium chamber, the hydrogen conduit extending from this closed container is As the rotating body rotates, each hydrogen conduit is connected to the low pressure hydrogen supply port so that when the closed container is in the high-temperature heating medium chamber, the hydrogen conduit extending from the closed container communicates only with the high pressure hydrogen outlet. A multi-stage hydrogen compression device characterized in that the hydrogen supply port and the high-pressure hydrogen outlet are sequentially communicated with or shut off.