JPH1085582A - Reaction vessel for solid-gas reaction powder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small, high-performance reaction vessel capable of suppressing the concentration of stress accompanying expansion of a gas-solid reaction powder and efficiently carrying out reaction gas flow and heat exchange. SOLUTION: A reaction vessel 1 has a vessel 11 for accommodating a solid-gas reaction powder (hydrogen storage alloy 81), and the vessel is vertically divided into a plurality of sections, on which the solid-gas reaction powder is placed and a reaction gas is permeated. A heat transfer tube 21 through which a heat medium flows and exchanges heat with the solid-gas reaction powder;
A heat transfer fin 25 mounted on the tub for promoting heat transfer between the solid-gas reaction powder and the heat medium, a gas pipe for introducing or discharging the reaction gas, and a gas pipe for allowing the reaction gas in the vessel to permeate and being connected to the gas pipe. And a gas permeable tube 35. The heat transfer tubes 21 are arranged so as to be in contact with the solid-gas reaction powder in each section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a reaction vessel for a solid-gas reaction powder such as a hydrogen storage alloy.

[0002]

2. Description of the Related Art In order to reduce the size of a hydrogen storage alloy reaction vessel and efficiently store and release hydrogen, heat generated during hydrogen storage is efficiently removed to the outside, and the reaction heat during hydrogen release is efficiently reduced from the outside. I have to supply it. In addition, since the hydrogen storage alloy expands when storing hydrogen and contracts when releasing hydrogen, the container must withstand the stress caused by the expansion and contraction of the hydrogen storage alloy.

For this reason, as shown in FIG. 11, for example, a hydrogen-absorbing alloy reaction vessel 9 is a cylindrical vessel 90 in which a large number of flexible heating medium thin tubes 91 are disposed to promote heat exchange. A gas permeable tube 92 composed of a hydrogen permeable filter is arranged to introduce or discharge hydrogen gas. In the figure, reference numeral 911 denotes a heat transfer fin.

[0004] In addition, during the initial activation of the hydrogen storage alloy, that is, in the process of enabling the hydrogen storage alloy to store hydrogen by repeating heating and deaeration and pressurization storage, the hydrogen storage alloy is generally pulverized. It must also cope with the problem of consolidation of the hydrogen storage alloy occurring at the bottom. In other words, if the hydrogen storage alloy is partially consolidated, problems such as concentration of stress locally or blockage of the flow of hydrogen gas occur. Therefore, it is necessary to prevent or cope with such problems.

[0005] Japanese Patent Application Laid-Open No. 7-286794 proposes a method in which a heat insulating buffer is provided at a lower portion of a container. Also, Japanese Patent Application Laid-Open No. Hei 7-269975 discloses that
A method has been proposed in which a plurality of internal divided containers are provided in a container filled with a hydrogen storage alloy and receive the expansion force of the hydrogen storage alloy, and a reaction container is constituted by the internal divided containers and a container constituting an outer shell. Then, the expansion force of the hydrogen storage alloy is borne by the plurality of inner divided containers, and the pressure of the reaction gas is received by the outer shell container.

[0006]

However, the conventional hydrogen storage alloy reaction vessel has the following problems. FIG.
The reaction vessel 9 shown in FIG.
There is a problem that the hydrogen storage alloy is partially densified below 0, and a closed region or the like that obstructs the flow of hydrogen is easily generated. Therefore, the diffusion of hydrogen gas is hindered, and the stress due to the volume expansion of the hydrogen storage alloy is concentrated thereon, and the heat exchange capacity of the reaction heat is also reduced.

Further, a method of providing a heat insulating cushioning material (Japanese Patent Application Laid-Open No. 7-286794) and a method of providing a plurality of internal divided containers inside the container (Japanese Patent Application Laid-Open No. 7-269797) are involved in the reaction. There is a problem that the useless space increases and the container becomes large. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and it is a small and highly efficient device capable of suppressing the concentration of stress due to the expansion of the solid-gas reaction powder and efficiently conducting the reaction and heat exchange. It is intended to provide a reaction vessel of high performance.

[0008]

The present invention relates to a reaction vessel for absorbing and desorbing a reaction gas into a gas-solid reaction powder, comprising a container for containing the gas-solid reaction powder to form an outer shell, and a plurality of compartments arranged vertically. A partition shelf on which the solid-gas reaction powder is placed and through which the reaction gas can pass, a heat transfer tube which circulates a heat medium and exchanges heat with the solid-gas reaction powder, and is mounted on the heat transfer tube. A heat transfer fin for promoting heat transfer between the solid-gas reaction powder and the heating medium, a gas pipe for introducing or discharging a reaction gas between the inside and the outside of the container, and a passage for allowing the reaction gas in the container to pass therethrough. A gas permeable tube connected to the gas tube, wherein the heat transfer tube is arranged so as to be in contact with the solid-gas reaction powder in each section divided by the partition shelf. It is in the reaction vessel for the solid-gas reaction powder.

The reaction vessel according to the present invention is divided into a plurality of compartments vertically arranged in the vessel by a partition shelf. By dividing the inside of the container in the vertical direction, the solid-gas reaction powder such as a hydrogen storage alloy is uniformly dispersed without being partially distributed. Therefore, for example, when the hydrogen storage alloy is pulverized by the initial activation, a problem that the powder partially consolidates hardly occurs. Therefore, the stress of the gas-solid reaction powder does not concentrate on a part, and the reaction gas released or occluded from the gas-solid reaction powder diffuses smoothly.

[0010] Further, since the reaction gas permeates the partition shelf, the reaction gas is uniformly filled in the container. Then, the expansion force of the solid-gas reaction powder in each section is absorbed in each section, and the stress is dispersed throughout. Since each section is separated by a partition shelf instead of a closed container, no wasteful space is created between the sections and the solid-gas reaction powder can be stored in the container without waste. Therefore, the size of the container can be reduced.

Further, the reaction gas injected or extracted into the container is supplied through a gas permeable pipe and a gas pipe of a gas permeable filter. On the other hand, since the heat transfer tubes are arranged so as to be in contact with the solid-gas reaction powder in each section divided by the partition shelf, the heat exchange required for promoting the reaction can be performed efficiently, and the solid-gas Promotes the reaction of the reaction powder.

As a result, the reaction of the solid-gas reaction powder proceeds efficiently and uniformly in the container, and no concentration of stress on the container occurs. Therefore, the reaction vessel according to the present invention can be made relatively small and lightweight. As described above, according to the present invention, there is provided a small, high-performance reaction vessel capable of suppressing the concentration of stress due to expansion of a solid-gas reaction powder and efficiently performing the reaction and exchanging heat. be able to.

It is preferable that the shape of the partition shelf is such that the lateral end is curved upward so as to gradually approach the vertical wall surface of the container (see FIG. 1, curved portion 151). ). As described above, the curved shape allows the partition shelf to be easily bent at the curved portion, and can absorb the expansion force by bending in the direction in which the solid-gas reaction powder expands. And, the reaction vessel of the present invention is characterized by claim 3.
As described, it is extremely suitable for hydrogen storage and release reactions of hydrogen storage alloys.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 This embodiment is a reaction vessel in which a hydrogen storage alloy (MH) as a solid-gas reaction powder absorbs and desorbs hydrogen gas as a reaction gas. As shown in FIG. 1 and FIG. 2, a reaction vessel 1 includes a vessel 11 that contains a hydrogen storage alloy 81 and forms an outer shell, and a vessel 1.
1 is divided into a plurality of sections in the vertical direction, and a hydrogen storage alloy 81 is placed on the partition shelf 15 through which hydrogen gas can pass, and a heat transfer tube 21 through which a heat medium flows to exchange heat with the hydrogen storage alloy 81. A heat transfer fin 25 mounted on the heat transfer tube 21 to promote heat transfer between the hydrogen storage alloy 81 and the heat medium;
A gas pipe 31 (FIG. 2) for introducing or discharging a reaction gas between the inside and the outside of the vessel 11 and a gas permeable filter through which hydrogen in the vessel 11 permeates are connected to the gas pipe 31. And a gas permeable tube 35.

The heat transfer tubes 21 are arranged so as to be in contact with the hydrogen storage alloy 81 in each section divided by the partition shelf 15. As shown in FIG. 1, the partition shelf 15 is formed such that the lateral end is curved upward and gradually approaches the vertical wall surface 111 of the container 11. The following is a supplementary explanation for each.

As shown in FIG. 1 and FIG.
It has a box-like shape with a rectangular cross section close to a square and long in the depth direction. And the container 11 has five partition shelves 1
5 are vertically divided into six sections. The heat transfer tubes 21 are arranged at equal intervals in the front-rear direction in each section, and the right end of the heat transfer tube 21 in each section is connected to the end of another section, and the heat transfer tubes 21 in the three sections below the left end. Is connected to the heat medium inlet 211 (FIG. 2), and the ends of the heat transfer tubes 21 in the upper three sections are connected to the heat medium outlet 21.
2 (FIG. 2). In addition, the gas permeable tube 35
Are extended in the depth direction at the upper center and the center, and each end is connected to the gas pipe 31.

Each member 11, 21, constituting the reaction vessel 1
25 and 31 are made of an aluminum alloy except for the gas permeable tube 35 and the partition shelf 15. And the container 11 and the heat transfer tube 21 have an integral structure by aluminum extrusion molding. The hydrogen storage alloy 81 is composed of the heat transfer tube 21 and the heat transfer fin 2.
5 is filled around. The hydrogen storage alloy 81
Is filled from a filling port (not shown) provided on the front or rear end face or side face of the container 11. Further, the gas permeable tube 35 and the partition shelf 15 are formed of a sintered stainless steel.

The gas permeable filter constituting the gas permeable tube 35 is a 1 μm permeable filter, and the hydrogen permeable partition shelf 15 has a gap diameter of 10 μm and a thickness of 0.4 to 0.5 m.
m. The above-mentioned permeation index was determined on the basis of the particle size distribution of the hydrogen storage alloy used after the activation treatment. However, in the case of the hydrogen storage alloy 81 used in the experiments described later, almost the same was observed in the range of 1 to 30 μm. The results have been obtained. In this example, the number of the gas permeation tubes 35 is two, and the decrease in the filling volume of the hydrogen storage alloy 81 is suppressed.

The heat transfer fins 25 are formed by laminating aluminum sheets having a thickness of 0.25 mm in the longitudinal direction of the container, and are brazed to the heat transfer tubes 21. The hydrogen storage alloy 81 is uniformly filled in each section, and the filling amount of the hydrogen storage alloy is based on the tap density generally used in powder engineering. Although the tap density of the hydrogen storage alloy changes before and after activation of the hydrogen storage alloy, the filling rate (filling density / true density) of the hydrogen storage alloy 81 contained in the container is determined before activation. It is preferable to select between the tap density after activation and the tap density after activation.

In the reaction vessel 1 of this embodiment, even if the filling rate (filling density / true density) is increased to about 110% of the tap density of the activated hydrogen storage alloy, excessive stress is generated in the reaction vessel 1. Was not observed, and good results were also obtained for the permeability of hydrogen gas inside the container. However, when the filling rate of the hydrogen storage alloy 81 was increased to the tap density before activation, the reaction vessel 1 of this example was not damaged, but the permeability of hydrogen gas in the interior was reduced. A trend was seen. Therefore, it seems that it is preferable to set the filling rate (filling density / true density) of the hydrogen storage alloy to be equal to or less than the tap density before activation.

Hydrogen storage alloy 81 stored in reaction vessel 1
First, an activation (hydrogenation) process is performed. That is, heat degassing and hydrogen pressurization are repeated so that the hydrogen storage alloy can store hydrogen gas, and in this process, the hydrogen storage alloy is pulverized by the entry of hydrogen gas. As described above, in the conventional reaction vessel in which the interior is not divided into compartments, in this process, the finely divided hydrogen storage alloy is unevenly distributed below the vessel, and the large expansion force generated in the early stage of the activation causes the hydrogen storage alloy to become inactive. The consolidation resulted in excessive stress concentration.

However, in this embodiment, since the internal space is divided into six sections by the partition shelf 15, the hydrogen storage alloys 81 are dispersed and arranged without gathering downward.
Consolidation of the hydrogen storage alloy is avoided. Then, the diffusion of the hydrogen gas is performed smoothly. Next, the state of stress generation and the results of hydrogen gas inflow and outflow velocities in the reaction vessel 1 of this example after activating the hydrogen storage alloy are shown in comparison with those of the conventional reaction vessel. In the case of the conventional reaction vessel, stress concentration is expected. Therefore, the reaction vessel used for comparison is a cylindrical vessel (Fig. 11) that is safe and has higher strength. The inner volumes of the containers 1 and 9 were almost the same.

First, the results of measurement of the state of occurrence of stress will be described. For the measurement of the stress generation state, the entire amount of hydrogen was released from the hydrogen storage alloy, and then hydrogen gas was stored at a rate of about 250 liter / min, and the magnitude of the strain on the surface of the container 11 at that time was measured. FIG. 3 shows how the ratio R1 between the maximum stress applied to the container and the stress due to the gas pressure of hydrogen gas changes with the increase in the amount of stored hydrogen (H / M) for the hydrogen storage alloy. is there.

The fact that the ratio R1 between the maximum stress and the gas pressure stress is 1 indicates that no stress is generated in the container 11 due to the expansion of the hydrogen storage alloy. The curve 61 in FIG. 3 indicates that the filling rate of the hydrogen storage alloy 81 was 50% using the reactor 1 of this example.
%, And curves 951 and 952 show a case where the filling rate of the hydrogen storage alloy is set to 40% and a case where the filling rate is set to 48% in the reaction vessel 9 shown in FIG.

As can be seen from the figure, the reaction vessel 1 of this embodiment
In the case of (curve 61), the ratio R1 between the maximum stress and the gas pressure stress does not change significantly with an increase in the amount of stored hydrogen (H / M), and the ratio R1 is about 1, whereas When the filling rate of the hydrogen storage alloy is set to approximately the same 48% using the apparatus (curve 962), the ratio R1 increases significantly and exceeds 8 times (H / M is 0.8 or less). The reason for completing the data collection is that the container is approaching the proof stress limit as shown in FIG. Also, curve 951
As shown in the figure, even when the filling rate of the hydrogen storage alloy in the conventional apparatus is set at 40%, which is 20% lower than the container of the present example,
When the amount of stored hydrogen (H / M) increases, the ratio R1 increases about three times, and becomes twice or more that of the reaction vessel 1 of this example.

On the other hand, FIG. 4 shows a ratio R2 between the maximum stress applied to the container and the 0.2% proof stress of the container material (aluminum alloy) with respect to the increase in the amount of stored hydrogen (H / M) with respect to the hydrogen storage alloy.
Shows how has changed. 4 shows a case where the filling rate of the hydrogen storage alloy 81 is set to 50% using the reactor 1 of the present example, and a curve 961,
Reference numeral 962 denotes a case where the filling rate of the hydrogen storage alloy is set to 40% and a case where the filling rate is set to 48% in the reaction vessel 9 shown in FIG.

As can be seen from the curve 62, in the case of the reaction vessel 1 of the present example, the ratio R2 with respect to the 0.2% proof stress slightly increases in a region where the amount of stored hydrogen (H / M) is large. This increase corresponds to a region where the equilibrium pressure of the hydrogen storage alloy increases and is due to an increase in the internal hydrogen gas pressure. On the other hand, as shown by the curve 962, when the filling rate of the hydrogen storage alloy is set to 48%, which is almost the same as that of the container of the present example, using the conventional apparatus, the above ratio R2 greatly increases, and the H / M ratio becomes 0.1%.
A result exceeding 0.2% proof stress is obtained at 7 or more.

Further, as shown by the curve 961, even when the filling rate of the hydrogen storage alloy in the conventional apparatus is set to 40%, which is 20% lower than that of the container of this embodiment, the hydrogen storage amount (H / M) increases. The above ratio R2 greatly increases. The above result is
It is shown that the use of the reaction vessel 1 of this example makes it possible to treat the reaction of the same amount of hydrogen storage alloy in a significantly smaller size.

Next, the evaluation results of the hydrogen permeation performance of the reaction vessels 1 and 9 will be shown. The hydrogen permeation performance was evaluated by using the flow rate of hydrogen flowing into and out of the reaction vessel as an index (the fin pitch of the heat transfer fins was 2 mm in both vessels and was the same). FIG. 5 shows the hydrogen flow rate during storage of hydrogen (hydrogen flow rate per unit weight of hydrogen storage alloy in liter / min), and FIG. 6 shows the hydrogen flow during hydrogen release (hydrogen flow rate per unit weight of hydrogen storage alloy in liter / min). ). In the measurement at the time of hydrogen storage, the initial amount of stored hydrogen H / M was 0.3, the temperature of the heating medium flowing into the heat transfer tube 21 was fixed at 35 ° C., and the pressure of the hydrogen gas was 35 ° C. The pressure was set to a constant value 0.3 MPa higher than the pressure.

A curve 97 in FIG. 5 shows a hydrogen flow rate per unit weight of the hydrogen storage alloy in the conventional reaction vessel 9.
Curve 63 shows the hydrogen flow rate of this example. As can be seen from the figure, the reaction vessel 1 of the present example exhibits extremely good hydrogen storage characteristics as compared with the conventional vessel. This is because in the conventional apparatus, hydrogen diffusion inside the container is insufficient, and the hydrogen storage alloy near the gas permeation pipe 35 performs good hydrogen storage, but the hydrogen storage alloy far from the gas permeation pipe 35 does not. This indicates that the gas did not reach and the occlusion was small. As a result, the flow rate of the flowing hydrogen gas is significantly reduced.

On the other hand, in this embodiment, since the inside of the container is divided and the distribution of the hydrogen storage alloy is made uniform, the hydrogen gas permeation / diffusion is improved over the entire region. Also, as mentioned above,
Since the compaction of the hydrogen storage alloy does not occur, the diffusion of hydrogen gas is not hindered by the compaction. It should be noted that the difference between the flow rates of the curves 63 and 97 becomes smaller with the passage of time because the amount of storable hydrogen is the same.

On the other hand, the measurement conditions at the time of releasing hydrogen gas shown in FIG. 6 are as follows: the initial amount of stored hydrogen (H / M) is set to 0.7;
The temperature of the heat medium flowing into the heat transfer tube 21 is kept constant at 10 ° C.
Hydrogen gas was released into the atmosphere. Curve 98 in FIG.
Indicates the hydrogen flow rate per unit weight of the hydrogen storage alloy in the conventional device, and curve 64 indicates the hydrogen flow rate in this example.

In the case of hydrogen release, immediately after the start, hydrogen gas existing inside the container is released in accordance with the pressure inside the container, so that there is no large difference between the curves 64 and 98. With the passage of time, hydrogen newly released from the hydrogen storage alloy becomes the main component, and the difference in hydrogen permeability between the two devices gradually appears as the difference in the outflow gas flow rate. The reason why the difference between the two is smaller than that during hydrogen storage is considered to be that diffusion of hydrogen gas is relatively easy even in the case of the conventional apparatus because the hydrogen storage alloy shrinks during hydrogen release.

As described above, according to the reaction vessel 1 of the present embodiment, since the hydrogen gas permeability is good and the flow rate of the hydrogen gas can be increased, the heat output obtained from the reaction vessel 1 can be increased. Can be increased. In addition, because the hydrogen permeability inside the vessel is good, the reaction inside the vessel proceeds almost uniformly and continuously, so that numerical analysis by modeling is easy, for example, optimization of heat transfer tubes and heat transfer fins Design becomes easy. This is because, as in the conventional device, when the hydrogen storage alloy is compacted and, for example, an obstruction is formed in the gas flow passage, numerical analysis becomes difficult and the deviation from the model used increases. It is.

Also, in the case of the strength design of the reaction vessel, since there is no concentration and uneven distribution of stress, it is possible to design the strength mainly with respect to the internal gas pressure. Can be set low.
That is, when the concentration of stress must be considered,
This is because the prediction is difficult, and the strength is set on the safe side based on experience and the like.

Further, as shown in FIG. 1, the partition shelf 15 of this embodiment is provided with a curved portion 151 having a lateral end curved upward, and the curved portion 151 is bent to expand the hydrogen storage alloy. Can be shared. In addition, the permeation of hydrogen gas can be facilitated by increasing the hydrogen permeation area due to the curvature. As described above, according to the reaction vessel 1 of the present example, the same performance can be obtained by reducing the size, and more excellent performance can be exhibited with the same size.

Second Embodiment As shown in FIG. 7, this embodiment is another embodiment in which the gas permeable sheet 16 is arranged along the entire circumference of the inner wall of the container 11 in the first embodiment. is there. According to this example,
The sheet 16 serves as a cushion, and the expansion force of the hydrogen storage alloy 81 added to the container 11 can be reduced.
Further, unlike the partition shelf 15, the sheet 16 does not require a function of holding the hydrogen storage alloy, so that a sheet having a large void diameter can be used. It has the effect of promoting diffusion. Further, the sheet 16 has an effect as a heat insulating layer between the inside and the outside of the container. Others are the same as the first embodiment.

Third Embodiment As shown in FIG. 8, this embodiment is another embodiment in which the heat transfer fins 26 around the heat transfer tube 21 in the first embodiment are spirally formed. That is, the heat transfer fins 26
Are formed in a spiral shape around the heat transfer tube 21 as shown in FIG. As a result, the hydrogen storage alloy can be moved in the longitudinal direction along the heat transfer fins 26 by applying gravity or vibration, so that the hydrogen storage alloy can be easily filled.

Since the heat transfer fin 26 has a smaller heat radiation area than the heat transfer fin 25 of the first embodiment, the heat transfer fin 26 is inferior in heat exchange performance, but can be filled with the hydrogen storage alloy 81 more. Others are the same as the first embodiment.

Fourth Embodiment This embodiment is another embodiment in which the size of the gas permeation pores in the partitioning shelf 15 is changed for each location in the first to third embodiments. It is. In other words, the diameter of the pores is made larger and coarser as the partition 15 is lower, and the diameter of the pores is made smaller and denser as the partition 15 is upper.

As a result, the partition shelf 15 below the container 11
Has a good hydrogen permeability, and there is no difference in the recovery or permeation of hydrogen gas due to the difference in the distance from the gas permeable pipe 35, and the reaction of the hydrogen storage alloy can be promoted uniformly regardless of the location in the container 11. . Others are the same as those of the first to third embodiments.

Fifth Embodiment As shown in FIG. 10, this embodiment is different from the first embodiment in that
The gas permeable pipe 35 of the compartment containing the hydrogen storage alloy 81
This is another embodiment in which the upper and lower widths L1 of the uppermost section 41 in which is present are larger than the upper and lower widths L2 of the other sections. According to this example, the hydrogen storage alloy 81 in each section is likely to gather below the section due to its own weight.
A hydrogen gas flow passage is formed in the upper part of the section 41 (the uppermost stage) in which is present. For this reason, the hydrogen gas can be diffused to the entire vessel by the hydrogen gas flow passage in addition to the gas permeable pipe 35, so that the diffusivity of the entire hydrogen gas is improved. Others are the same as the first embodiment.

[0043]

As described above, according to the present invention, it is possible to suppress the concentration of stress accompanying the expansion of the solid-gas reaction powder, and to achieve a small, high-performance device capable of efficiently conducting the reaction and exchanging heat. A reaction vessel can be obtained.

[0044]

[Brief description of the drawings]

FIG. 1 is a front sectional view of a hydrogen storage alloy reaction container according to a first embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a diagram showing the relationship between the amount of stored hydrogen (H / M) in the reaction vessel of Embodiment 1 and the ratio R1 of the maximum stress applied to the vessel to the gas pressure in comparison with a conventional apparatus.

FIG. 4 shows the amount of stored hydrogen (H / M) in the reaction vessel of Embodiment 1 and 0.2% of the maximum stress applied to the vessel.
The figure which showed the relationship with the ratio R2 with respect to proof stress compared with the conventional apparatus.

FIG. 5 is a diagram showing a time change of a flow rate of stored hydrogen per unit weight of a hydrogen storage alloy in a reaction vessel of Embodiment 1 in comparison with a conventional apparatus.

FIG. 6 is a diagram showing a change over time of a flow rate of released hydrogen per unit weight of the hydrogen storage alloy in the reaction vessel of Embodiment 1 in comparison with a conventional apparatus.

FIG. 7 is a front sectional view of a hydrogen storage alloy reaction container according to a second embodiment.

FIG. 8 is a front sectional view of a hydrogen storage alloy reaction container according to a third embodiment.

FIG. 9 is a partially enlarged view showing a state in which the heat transfer fin according to the third embodiment is mounted on a heat transfer tube.

FIG. 10 is a front sectional view of a hydrogen storage alloy reaction container according to a fifth embodiment.

FIG. 11 is a front sectional view of a conventional hydrogen storage alloy reaction vessel.

[Explanation of symbols]

 1. . . 10. reaction vessel, . . Container, 15. . . Partition shelf, 21. . . Heat transfer tubes, 25, 26. . . Heat transfer fins, 35. . . Gas permeation tube, 81. . . Hydrogen storage alloy (solid-gas reaction powder),

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Mitsui 41, Yokomichi, Yokomichi, Nagakute-cho, Aichi-gun, Aichi Prefecture Inside Toyota Central R & D Laboratories Co., Ltd. 41 No. 1 Yokomichi, Toyota Central Research Institute, Inc. (72) Inventor Hideto Kubo 2-1-1, Toyota-cho, Kariya-shi, Aichi Prefecture Inside Toyota Industries Corporation (72) Inventor Keiji Fuji, Kariya-shi, Aichi Prefecture 2-1-1 Toyota Town Inside Toyota Industries Corporation (72) Inventor Nobuo Fujita 1-1 Toyota Town Toyota City, Aichi Prefecture Inside Toyota Motor Corporation

Claims (3)

[Claims] 1. A reaction container for absorbing and desorbing a reaction gas into a gas-solid reaction powder, the container containing the gas-solid reaction powder and forming an outer shell, and the container is vertically divided into a plurality of sections. A partition shelf on which the solid-gas reaction powder is placed and through which the reaction gas can pass, a heat transfer tube through which a heat medium flows to exchange heat with the solid-gas reaction powder, and a solid-gas reaction powder attached to the heat transfer tube. A heat transfer fin for promoting heat transfer between the heating medium, a gas pipe for introducing or discharging a reaction gas between the inside and the outside of the vessel, and a connection with the gas pipe for allowing the reaction gas in the vessel to pass therethrough Wherein the heat transfer tube is disposed in contact with the solid-gas reaction powder in each section divided by the partition shelf. Reaction vessel. 2. A reaction vessel for solid-gas reaction powder according to claim 1, wherein the partition shelf has a lateral end curved upward and is formed so as to gradually approach a vertical wall surface of the vessel. 3. The hydrogen storage alloy reaction vessel according to claim 1, wherein the solid-gas reaction powder is a hydrogen storage alloy, and the reaction gas is a hydrogen gas.