Hydrogen production system

Abstract

This invention provides a hydrogen manufacturing system that can improve the cost of hydrogen production. The hydrogen manufacturing system includes: a slurry of hydrogen compound components, formed by suspending hydrogen compound components in a solvent containing water; a first container; a second container, the temperature of which is higher than that of the first container; a first path connecting the first container and the second container; and a second path connecting the first container and the second container. Unlike the first path, the hydrogen manufacturing system is configured to move the hydrogen compound component slurry contained in the first container into the second container via the first path, and to move the hydrogen compound component slurry contained in the second container into the first container via the second path.

Description

Technical Field

[0001] This disclosure relates to hydrogen production systems.

[0002] This application claims priority based on Japan Patent Application No. 2022-51877 filed with the Japan Patent Office on March 28, 2022, the contents of which are incorporated herein by reference. Background Technology

[0003] Patent Document 1 describes a two-dimensional boroide sheet that releases hydrogen by heating to 150–200°C. Since hydrogen is highly reactive and explosive, Patent Document 1 also describes a method for generating hydrogen by irradiating the two-dimensional boroide sheet with light, which can be easily produced even at room temperature.

[0004] Prior art literature

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2019-218251

[0007] In both heating and light irradiation, to properly recover the hydrogen released from the two-dimensional borosilicate sheet, it is necessary to release the hydrogen from the sheet contained in a sealed container and allow the released hydrogen to flow out of the container. Therefore, when hydrogen is released by heating, not only the two-dimensional borosilicate sheet but also the container is heated. This requires excess heat equivalent to the container's heat capacity, resulting in reduced thermal efficiency and raising the issue of reducing the cost of hydrogen production. Summary of the Invention

[0008] In view of the above, the object of at least one embodiment of this disclosure is to provide a hydrogen production system that can improve the cost of hydrogen production.

[0009] To achieve the above objectives, the hydrogen production system disclosed herein comprises: a hydrogen compound component slurry, which suspends a hydrogen compound component in a solvent containing water; a first container; a second container, the temperature of which is higher than that of the first container; a first path connecting the first container and the second container; and a second path connecting the first container and the second container. Unlike the first path, the hydrogen production system is configured to be able to move the hydrogen compound component slurry contained in the first container into the second container via the first path, and to move the hydrogen compound component slurry contained in the second container into the first container via the second path.

[0010] Invention Effects

[0011] According to the hydrogen production system disclosed herein, hydrogen can be produced by moving a slurry containing a hydrogen compound component storing hydrogen in a first container to a second container at a higher temperature than the first container, releasing hydrogen from the hydrogen compound component in the second container, and then moving the slurry containing the released hydrogen compound component back to the first container, thereby re-storing hydrogen in the hydrogen compound component. By performing this operation, only the temperature of the hydrogen compound component slurry needs to fluctuate, thus minimizing temperature variations between the first and second containers containing the hydrogen compound component slurry, thereby improving thermal efficiency and consequently reducing the cost of hydrogen production. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the hydrogen production system according to Embodiment 1 of this disclosure.

[0013] Figure 2 This is a schematic diagram of the hydrogen production system according to Embodiment 2 of this disclosure.

[0014] Explanation of reference numerals in the attached figures:

[0015] 1…hydrogen production system;

[0016] 2…First container;

[0017] 3…Second container;

[0018] 4…hydrogen compound component slurry;

[0019] 5…First path;

[0020] 6…Second path;

[0021] 11…First temperature regulating device;

[0022] 12…Second temperature regulating device;

[0023] 13…First pump;

[0024] 14…Second pump;

[0025] 15… Heat exchangers;

[0026] 25…water supply device;

[0027] 41… Hydrogen compound component supply device;

[0028] 42…Slurry tank (storage component);

[0029] 43…Slurry supply path;

[0030] 44…supply pump;

[0031] 51…discharge device;

[0032] 54… Solid-liquid separator. Detailed Implementation

[0033] The hydrogen production system according to embodiments of the present disclosure will now be described based on the accompanying drawings. The embodiments described below illustrate one aspect of the present disclosure and are not intended to limit the disclosure; any modifications can be made within the scope of the technical concept of the present disclosure.

[0034] (Implementation Method 1)

[0035] <Structure of the hydrogen production system according to Embodiment 1 of this disclosure>

[0036] like Figure 1 As shown, the hydrogen production system 1 of Embodiment 1 of this disclosure includes a first container 2 and a second container 3. The first container 2 and the second container 3 are each configured to contain a slurry 4 of a hydrogen compound component, formed by suspending a hydrogen compound component in a solvent containing water. The first container 2 and the second container 3 are connected via two different paths, namely a first path 5 and a second path 6. Here, the solvent containing water is not limited to a solvent containing only water, but may also be a solvent in which water is mixed with an organic solvent, such as acetonitrile or acetone.

[0037] Hydrogen compound components have the following structure: when an element other than hydrogen (H) is designated as X, it contains an element with the chemical formula X. m H n The powder, representing a two-dimensional arrangement of hydrogen compounds, is supported on a granular carrier, such as microspheres. The stoichiometric ratio m:n is 1:1 to 3:4 (e.g., XH, XH2, XH3, XH4, X2H3, X3H4). Although not limited, element X is, for example, boron (B).

[0038] In the hydrogen production system 1, the temperature inside the second container 3, i.e., the temperature of the hydrogen compound component slurry 4 contained within the second container 3, is maintained higher than the temperature inside the first container 2, i.e., the temperature of the hydrogen compound component slurry 4 contained within the first container 2. To maintain this temperature relationship, a first temperature regulating device 11 can be provided inside the first container 2, and a second temperature regulating device 12 can be provided inside the second container 3. The structures of the first temperature regulating device 11 and the second temperature regulating device 12 are not particularly limited; for example, they can be coil-shaped pipes through which the heat medium exchanging heat with the hydrogen compound component slurry 4 flows. It should be noted that the temperature range of the former is preferably 20°C to 150°C, and the temperature range of the latter is preferably 150°C to 250°C. To maintain the water in a liquid state within such temperature ranges, the internal pressure of each of the first container 2 and the second container 3 is pressurized to at least atmospheric pressure (e.g., 4 MPaG).

[0039] The hydrogen compound component slurry 4 in the first container 2 is transferred to the second container 3 via the first path 5, and the hydrogen compound component slurry 4 in the second container 3 is transferred back to the first container 2 via the second path 6, as detailed in the operation description below. To achieve this operation, as an example, a first pump 13 and a second pump 14 may be installed on the first path 5 and the second path 6 respectively. The first pump 13 and the second pump 14 enable forced circulation of the hydrogen compound component slurry 4 between the first container 2 and the second container 3.

[0040] Alternatively, a heat exchanger 15 may be provided to exchange heat between the hydrogen compound component slurry 4 flowing in the first path 5 and the hydrogen compound component slurry 4 flowing in the second path 6 during the circulation of the hydrogen compound component slurry 4 between the first container 2 and the second container 3.

[0041] Stirring devices 16 and 17 for stirring the hydrogen compound component slurry 4 contained within each container can also be installed in the first container 2 and the second container 3, respectively. When the hydrogen compound component slurry 4 circulates between the first container 2 and the second container 3, if the flow of the hydrogen compound component slurry 4 does not stagnate, the hydrogen compound component will not precipitate from the hydrogen compound component slurry 4. However, it is practically difficult to completely prevent the precipitation of the hydrogen compound component. In this regard, if stirring devices 16 and 17 are installed in the first container 2 and the second container 3, respectively, and the hydrogen compound component slurry 4 in the first container 2 and the second container 3 is stirred thoroughly, the precipitation of the hydrogen compound component from the hydrogen compound component slurry 4 can be suppressed. In addition, by stirring the hydrogen compound component slurry 4, the temperature regulation efficiency of the first temperature regulating device 11 and the second temperature regulating device 12 on the hydrogen compound component slurry 4 can also be improved.

[0042] Oxygen is generated when hydrogen is stored in the hydrogen compound component in the first container 2, as detailed in the operation description below. To allow the generated oxygen to flow out of the first container 2, one end of the outflow path 21 can be connected to the first container 2. A separation device 22 can be provided in the outflow path 21 to separate the fluid flowing in the outflow path 21 into water and oxygen. The separation device 22 can be a cooler or a separation membrane device, etc. If the separation device 22 is a cooler, a return channel 23 can also be provided in the outflow path 21 downstream of the separation device 22. To allow the water separated by the separation device 22 to return to the first container 2, a water return path 24 can be provided, with one end connected to the separation device 22 or the return channel 23 and the other end connected to the first container 2.

[0043] Hydrogen is released from the hydrogen compound component within the second container 3, details of which will be explained in the operational description below. To allow the released hydrogen to flow out of the second container 3, one end of an outflow path 31 can be connected to the second container 3. A separation device 32 can be installed in the outflow path 31 to separate the fluid flowing in the outflow path 31 into water and hydrogen. The separation device 32 can also be a cooler or a separation membrane device, etc. If the separation device 32 is a cooler, a return channel 33 can be installed downstream of the separation device 32 on the outflow path 31. To allow the water separated by the separation device 32 to return to the second container 3, a water return path 34 can be provided, with one end connected to the separation device 32 or the return channel 33 and the other end connected to the second container 3.

[0044] During hydrogen production in the hydrogen production system 1, water is consumed in the hydrogen compound component slurry 4, details of which will be explained in the operation description below. To replenish the consumed water in the hydrogen production system 1 so that hydrogen production can be carried out continuously, a water supply device 25 may be provided. Water can be supplied to either the first container 2 or the second container 3, but from the viewpoint of thermal efficiency, it is preferable to supply water to the first container 2, which has a lower internal temperature. The specific structure of the water supply device 25 is not particularly limited; for example, the water supply device 25 may also include a water supply path 27 connected at one end to a water supply source 26 such as a tap water pipe or a water tank and at the other end to the first container 2, and a pump 28 provided in the water supply path 27.

[0045] Hydrogen compound components cannot be used indefinitely and gradually deteriorate during hydrogen production. Therefore, a hydrogen compound component supply device 41 for supplying hydrogen compound components into the first container 2 and a discharge device 51 for discharging hydrogen compound component slurry 4 from the second container 3 can be provided. In this way, deteriorated hydrogen compound components can be removed from the hydrogen production system 1, and new hydrogen compound components can be supplied to the hydrogen production system 1, thus enabling continuous hydrogen production.

[0046] The specific structure of the hydrogen compound component supply device 41 is not particularly limited. For example, it can also have the following structure: a slurry tank 42 serving as a storage component for storing hydrogen compound component slurry 4' containing new hydrogen compound components, a slurry supply path 43 connecting the slurry tank 42 and the first container 2, and a supply pump 44 provided on the slurry supply path 43. The slurry supply path 43 can be directly connected to the first container 2, or it can be connected to the first container 2 by a confluence path 45 after merging with the water supply path 27. In the latter case, a three-way valve 46 for switching between supplying water from the water supply source 26 and supplying hydrogen compound component slurry 4' from the slurry tank 42 can also be provided at the confluence of the water supply path 27 and the slurry supply path 43.

[0047] The hydrogen compound component supply device 41 can also supply new hydrogen compound components to the first container 2 or the water supply path 27 in granular form, rather than in slurry form. However, if granular hydrogen compound components are directly supplied to the first container 2, the supplied hydrogen compound components may aggregate. In this regard, supplying new hydrogen compound components in slurry form can reduce the possibility of hydrogen compound component aggregation.

[0048] The specific structure of the discharge device 51 is not particularly limited. For example, it may have the following structure: a discharge path 52 connected at one end to the second container 3, and a valve 53 disposed in the discharge path 52. Alternatively, the discharge device 51 may also include a solid-liquid separator 54 for solid-liquid separation of the hydrogen compound component slurry 4. The specific structure of the solid-liquid separator 54 is not particularly limited, but the solid-liquid separator 54 may, for example, be a filter.

[0049] <Operation of the hydrogen production system according to Embodiment 1 of this disclosure>

[0050] Next, the operation of the hydrogen production system 1 according to Embodiment 1 of this disclosure will be described. Hydrogen compound component slurry 4 is contained in both the first container 2 and the second container 3. For example, the temperature of the hydrogen compound component slurry 4 in the first container 2 is maintained in the range of 100°C to 150°C by the first temperature regulating device 11 and the second temperature regulating device 12, and the temperature of the hydrogen compound component slurry 4 in the second container 3 is maintained in the range of 200°C to 250°C. In the first container 2, if the temperature of the hydrogen compound component slurry 4 is within the above range, water decomposes into hydrogen and oxygen in the presence of the hydrogen compound component, and the hydrogen is absorbed by the hydrogen compound component. Thus, the hydrogen compound component is in a hydrogen storage state. Oxygen flows out of the first container 2 and circulates in the outflow path 21, is separated into water and oxygen by the separation device 22, the water returns to the first container 2 via the water return path 24, and the oxygen is supplied to a storage device or oxygen consumption device (not shown). It should be noted that in Embodiment 1, the hydrogen compound component is in a slurry state suspended in water, therefore the contact between the water and the hydrogen compound component is good. In contrast, in structures that supply water or water vapor to the hydrogen compound component, the flow path of the water or water vapor may be fixed, potentially creating a portion of the hydrogen compound component that does not come into contact with water or water vapor. Therefore, by using the hydrogen compound component slurry 4, the absorption of hydrogen into the hydrogen compound component can be performed more effectively compared to structures that supply water or water vapor to the hydrogen compound component.

[0051] For example, when the hydrogen compound component slurry 4 containing the hydrogen compound component is pumped into the second container 3 via the first path 5 by the first pump 13, the temperature rises to a range of 200°C to 250°C. When the hydrogen compound component containing hydrogen is within this temperature range, hydrogen is released from the hydrogen compound component. The hydrogen flows out of the second container 3 and flows through the outflow path 31, where it is separated into water and oxygen by the separation device 32. The water returns to the second container 3 via the water return path 34, and the hydrogen is supplied to a storage device or hydrogen consumption device (not shown).

[0052] For example, when the hydrogen compound component slurry 4, containing the hydrogen-releasing hydrogen compound component, flows into the first container 2 via the second path 6 through the second pump 14, the temperature rises to a range of 100°C to 150°C. When the hydrogen-releasing hydrogen compound component is within this temperature range, hydrogen is absorbed by the hydrogen compound component through the aforementioned action. The hydrogen compound component slurry 4 circulates between the first container 2 and the second container 3, which have different temperatures, thereby storing hydrogen in the first container 2 and releasing hydrogen from the hydrogen compound component in the second container 3, thus producing hydrogen through the hydrogen production system 1.

[0053] The hydrogen production system 1 produces hydrogen by moving a slurry 4 containing hydrogen compound components stored in a first container 2 to a second container 3 at a higher temperature than the first container 2, releasing hydrogen from the hydrogen compound components in the second container 3, and then moving the slurry 4 containing the released hydrogen compound components back to the first container 2, thereby storing the hydrogen in the hydrogen compound components again. By performing this operation, only the temperature of the hydrogen compound component slurry 4 needs to fluctuate, thus minimizing temperature variations between the first container 2 and the second container 3 containing the hydrogen compound component slurry 4. This improves thermal efficiency and, consequently, reduces the cost of hydrogen production.

[0054] When a heat exchanger 15 is provided in the hydrogen production system 1, the hydrogen compound component slurry 4 transferred from the first container 2 to the second container 3 is heated, while the hydrogen compound component slurry 4 transferred from the second container 3 to the first container 2 is cooled. This reduces the load on the first temperature control device 11 and the second temperature control device 12. As a result, thermal efficiency is improved, and the cost of hydrogen production is reduced.

[0055] When a water supply device 25 is provided in the hydrogen production system 1, water can be supplied from the water supply device 25 to the first container 2 at a flow rate that replenishes the water consumed in the first container 2 during the hydrogen production operation. As a result, hydrogen production can be carried out continuously in the hydrogen production system 1.

[0056] As described above, the hydrogen compound components gradually deteriorate during hydrogen production. When the hydrogen production system 1 is equipped with a hydrogen compound component supply device 41 and a discharge device 51, the deteriorated hydrogen compound components can be discharged, while new hydrogen compound components can be added. Therefore, hydrogen production can be carried out continuously.

[0057] When the discharge device 51 is equipped with a solid-liquid separator 54, the hydrogen compound component slurry discharged from the second container 3 can be subjected to solid-liquid separation, and the separated solid, i.e., the deteriorated hydrogen compound component, can be recovered. If the hydrogen compound component can be regenerated, it can be reused in the hydrogen production system 1 after being regenerated from the recovered hydrogen compound component.

[0058] (Implementation Method 2)

[0059] Next, the hydrogen production system of Embodiment 2 of this disclosure will be described. The hydrogen production system of Embodiment 2 differs from Embodiment 1 in that the means of circulating the hydrogen compound component slurry 4 between the first container 2 and the second container 3 is changed. It should be noted that in Embodiment 2, components that are identical to those in Embodiment 1 are labeled with the same reference numerals, and their detailed descriptions are omitted.

[0060] <Structure of the hydrogen production system according to Embodiment 2 of this disclosure>

[0061] like Figure 2 As shown, in the hydrogen production system 1 of Embodiment 2 of this disclosure, the second path 6 is positioned vertically above the first path 5. The first temperature regulating device 11 is positioned above the point where the first path 5 connects to the first container 2 in the first container 2. Preferably, the first temperature regulating device 11 is positioned as high as possible vertically within the first container 2. Therefore, it is preferable to position the first temperature regulating device 11 near the surface of the hydrogen compound component slurry 4 within the first container 2. When the hydrogen compound component slurry 4 is full within the first container 2, it is preferable to position the first temperature regulating device 11 at the top within the first container 2. The hydrogen compound component slurry 4 in the first container 2 is transferred to the second container 3 via the first path 5; therefore, the surface of the hydrogen compound component slurry 4 in the first container 2 should be at least above the point where the first path 5 connects to the first container 2. Therefore, the first temperature regulating device 11 is positioned at least above the point where the first path 5 connects to the first container 2 within the first container 2.

[0062] The second temperature regulating device 12 is disposed in the second container 3 at a position lower than the location where the first path 5 connects to the first container 2. The second temperature regulating device 12 is preferably disposed within the second container 3 at the lowest possible position in the vertical direction. Therefore, the first temperature regulating device 11 is preferably disposed at the bottom of the second container 3. Other structural features include the absence of stirring devices 16 and 17 (see reference). Figure 1 ), and the first pump 13 (refer to Figure 1 ) and second pump 14 (refer to) Figure 1 Except for ), it is the same as in implementation method 1.

[0063] <Operation of the hydrogen production system according to Embodiment 2 of this disclosure>

[0064] Next, the operation of the hydrogen production system 1 according to Embodiment 2 of this disclosure will be described. In Embodiment 2, only the circulation of the hydrogen compound component slurry 4 between the first container 2 and the second container 3 is different; all other operations are the same as in Embodiment 1. Therefore, only the circulation operation of the hydrogen compound component slurry 4 will be described below.

[0065] When the hydrogen compound component slurry 4 is cooled by the first temperature regulating device 11 in the first container 2, the cooled hydrogen compound component slurry 4 moves downward in the first container 2 due to convection. The hydrogen compound component slurry 4 moving downward in the first container 2 flows into the second container 3 through the first path 5. When the hydrogen compound component slurry 4 flowing into the second container 3 is heated by the second temperature regulating device 12, the heated hydrogen compound component slurry 4 moves upward in the second container 3 due to convection. The hydrogen compound component slurry 4 moving upward in the second container 3 flows into the first container 2 through the second path 6. Through this action, the hydrogen compound component slurry 4 can circulate between the first container 2 and the second container 3 by natural convection. In Embodiment 2, since a pump for circulating the hydrogen compound component slurry 4 is not required, the cost of hydrogen production can be improved compared to Embodiment 1.

[0066] In order to facilitate the circulation of the hydrogen compound component slurry 4 between the first container 2 and the second container 3 by natural convection, the first container 2 and the second container 3 preferably have shapes that extend relatively long in the vertical direction.

[0067] The contents described in the above embodiments shall be understood as follows.

[0068] [1] A proposed hydrogen production system has the following features:

[0069] Hydrogen compound component slurry (4), which suspends hydrogen compound components in a solvent containing water;

[0070] First container (2);

[0071] The temperature inside the second container (3) is higher than that inside the first container (2);

[0072] A first path (5) connects the first container (2) and the second container (3); and

[0073] The second path (6) connects the first container (2) and the second container (3) and is different from the first path (5).

[0074] The hydrogen production system is configured to move the hydrogen compound component slurry (4) contained in the first container (2) into the second container (3) via the first path (5), and to move the hydrogen compound component slurry (4) contained in the second container (3) into the first container (2) via the second path (6).

[0075] According to the hydrogen production system disclosed herein, hydrogen can be produced by moving a slurry containing a hydrogen compound component storing hydrogen in a first container to a second container at a higher temperature than the first container, releasing hydrogen from the hydrogen compound component in the second container, and then moving the slurry containing the released hydrogen compound component back to the first container, thereby re-storing hydrogen in the hydrogen compound component. By performing this operation, only the temperature of the hydrogen compound component slurry needs to fluctuate, thus minimizing temperature variations between the first and second containers containing the hydrogen compound component slurry, thereby improving thermal efficiency and consequently reducing the cost of hydrogen production.

[0076] [2] Another hydrogen production system is based on the hydrogen production system in [1].

[0077] The hydrogen production system has the following features:

[0078] A first temperature regulating device (11) cools the hydrogen compound component slurry (4) within the first container (2); and

[0079] The second temperature regulating device (12) heats the hydrogen compound component slurry (4) in the second container (3).

[0080] With this structure, the temperature of the hydrogen compound component slurry in the first container can be maintained within a temperature range that allows hydrogen to be stored in the hydrogen compound, and the temperature of the hydrogen compound component slurry in the second container can be maintained within a temperature range that allows hydrogen to be released from the hydrogen compound.

[0081] [3] Another hydrogen production system is based on the hydrogen production system of [1] or [2].

[0082] The hydrogen production system has the following features:

[0083] A first pump (13), located in the first path (5), transfers the hydrogen compound slurry (4) from the first container (2) to the second container (3); and

[0084] A second pump (14) is located in the second path (6) and transfers the hydrogen compound component slurry (4) in the second container (3) to the first container (2).

[0085] This structure enables forced circulation of the hydrogen compound component slurry between the first and second containers.

[0086] [4] Another hydrogen production system is based on the hydrogen production system in [2].

[0087] The second path (6) is positioned vertically above the first path (5).

[0088] The first temperature regulating device (11) is disposed in the first container (2) at a position above the position where the first path (5) connects to the first container (2).

[0089] The second temperature regulating device (12) is disposed in the second container (3) in a position lower than the position where the first path (5) connects to the second container (6).

[0090] According to this structure, in the first container, the hydrogen compound component slurry moves downward in the first container under the action of convection generated by cooling by the first temperature regulating device. Then, the hydrogen compound component slurry flows into the second container through the first path. The hydrogen compound component slurry flowing into the second container moves upward in the second container under the action of convection generated by heating by the second temperature regulating device. Then, the hydrogen compound component slurry flows into the first container through the second path. Through this action, the hydrogen compound component slurry can be circulated between the first and second containers under the action of natural convection. In this structure, since a pump for circulating the hydrogen compound component slurry between the first and second containers is not required, the hydrogen production cost can be improved compared with the structure described above [3].

[0091] [5] Another hydrogen production system is based on the hydrogen production system described in any one of [1] to [4].

[0092] The hydrogen production system includes a heat exchanger (15) for exchanging heat between the hydrogen compound component slurry (4) flowing in the first path (5) and the hydrogen compound component slurry (4) flowing in the second path (6).

[0093] With this structure, the hydrogen compound component slurry transferred from the first container to the second container is heated, while the hydrogen compound component slurry transferred from the second container to the first container is cooled, thus reducing the load on both the second and first temperature control devices. As a result, thermal efficiency is improved, and the cost of hydrogen production is reduced.

[0094] [6] Another hydrogen production system is based on the hydrogen production system described in any one of [1] to [5].

[0095] The hydrogen production system includes a water supply device (25) for supplying water to the first container (2).

[0096] With this structure, the water consumed by the hydrogen storage in the first container can be replenished, thus enabling continuous hydrogen production.

[0097] [7] Another hydrogen production system is based on the hydrogen production system described in any one of [1] to [6].

[0098] The hydrogen production system includes:

[0099] Discharge device (51) that discharges the hydrogen compound component slurry (4) from the second container (3); and

[0100] Hydrogen compound component supply device (41) supplies the hydrogen compound component into the first container (2).

[0101] With this structure, deteriorated hydrogen compound components can be discharged while new hydrogen compound components are added, thus enabling continuous hydrogen production.

[0102] [8] Another hydrogen production system is based on the hydrogen production system in [7].

[0103] The discharge device (51) includes a solid-liquid separator (54) for solid-liquid separation of the hydrogen compound component slurry (4).

[0104] Based on this structure, if it is a renewable hydrogen compound component, it can be recycled by separating the hydrogen compound component from the discharged hydrogen compound component slurry, and the recycled hydrogen compound component can be regenerated and reused.

[0105] [9] Another hydrogen production system is based on the hydrogen production system in [8].

[0106] The hydrogen compound component supply device (41) includes:

[0107] Storage component (slurry tank 42) for storing the hydrogen compound component slurry (4);

[0108] A slurry supply path (43) connecting the storage component (42) to the first container (2); and

[0109] A supply pump (44) is provided in the slurry supply path (43) and supplies the hydrogen compound slurry (4) in the storage member (42) to the first container (2).

[0110] If granular hydrogen compound components are supplied directly into the first container, the supplied hydrogen compound components may aggregate. To address this, supplying new hydrogen compound components in slurry form can reduce the likelihood of aggregation.

Claims

1. A hydrogen production system, wherein, The hydrogen production system includes: Hydrogen compound component slurry, which suspends hydrogen compound components in a solvent containing water; First container; The temperature inside the second container is higher than that inside the first container; A first path connects the first container and the second container; The second path connects the first container and the second container, and is different from the first path; A first temperature regulating device regulates the temperature of the hydrogen compound component slurry in the first container; as well as A second temperature regulating device regulates the temperature of the hydrogen compound component slurry within the second container. The hydrogen production system is configured to move the hydrogen compound component slurry contained in the first container into the second container via the first path, and to move the hydrogen compound component slurry contained in the second container into the first container via the second path. The second path is positioned vertically above the first path. The first temperature regulating device is positioned above the point where the first path connects to the first container in the first container. The second temperature regulating device is positioned in the second container at a location lower than the point where the first path connects to the second container. The hydrogen compound component has the following structure: when an element other than hydrogen is designated as X, it contains an element with the chemical formula X. m H n The powder representing a two-dimensional arrangement of hydrogen compounds is supported on a granular carrier, with a stoichiometric ratio m:n of 1:1 to 3:4, and the element X is boron.

2. The hydrogen production system according to claim 1, wherein, The hydrogen production system includes: A first pump, positioned along the first path, transfers the hydrogen compound slurry from the first container to the second container; and A second pump is located in the second path and transfers the hydrogen compound component slurry from the second container to the first container.

3. The hydrogen production system according to claim 1 or 2, wherein, The hydrogen production system includes a heat exchanger for exchanging heat between the hydrogen compound component slurry flowing in the first path and the hydrogen compound component slurry flowing in the second path.

4. The hydrogen production system according to claim 1 or 2, wherein, The hydrogen production system includes a water supply device for supplying water to the first container.

5. The hydrogen production system according to claim 1 or 2, wherein, The hydrogen production system includes: Discharge device, which discharges the hydrogen compound component slurry from the second container; and A hydrogen compound component supply device that supplies the hydrogen compound component into the first container.

6. The hydrogen production system according to claim 5, wherein, The discharge device includes a solid-liquid separator for solid-liquid separation of the hydrogen compound component slurry.

7. The hydrogen production system according to claim 6, wherein, The hydrogen compound component supply device includes: A storage component that stores the hydrogen compound component slurry; A slurry supply path that connects the storage component to the first container; as well as A supply pump is provided in the slurry supply path and supplies the hydrogen compound slurry in the storage component to the first container.

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