Control device for hydrogen boiler system

Abstract

To suppress an increase in cost and an increase in energy consumption of a hydrogen boiler system.SOLUTION: The hydrogen boiler system 1 includes a reaction tower 3 storing an aromatic compound capable of storing and releasing hydrogen Fg, a water supply tank 4 storing water, and a hydrogen boiler 5 burning the hydrogen Fg supplied from the reaction tower 3 to obtain water supply from the water supply tank 4. A control device 10 of a hydrogen boiler system 1 supplies water from a water supply tank 4 to a reaction tower 3 in storing hydrogen Fg, and supplies high temperature fluid from the hydrogen boiler 5 to the reaction tower 3 in discharging the hydrogen Fg.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a control device for a hydrogen boiler system. [Background technology]

[0002] To combat global warming, the use of hydrogen as an energy source is being considered in various fields. One well-known technology for handling hydrogen is storing it in a hydrogen carrier. The organic chemical hydride method is a well-known hydrogen storage technology. The organic chemical hydride method involves hydrogenating aromatic compounds, storing hydrogen in the aromatic compounds, and then dehydrogenating the aromatic compounds to release hydrogen when the hydrogen is used. Hydrogenation is a chemical reaction that adds hydrogen to aromatic compound molecules. Dehydrogenation is a chemical reaction that removes hydrogen from aromatic compounds. The hydrogenated aromatic compound is a hydrogen carrier. Toluene is a well-known example of an aromatic compound before hydrogenation. Methylcyclohexane (MCH) is a well-known example of a hydrogenated aromatic compound. Hydrogenated aromatic compounds are liquids at room temperature and pressure, making them suitable for storage and transportation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-216774 Summary of the Invention [Problem to be solved by the invention]

[0004] Aromatic compounds generate heat when storing hydrogen. Therefore, when storing hydrogen in aromatic compounds, the aromatic compounds must be cooled. When releasing hydrogen from aromatic compounds, the aromatic compounds must be heated. When aromatic compounds are used in a hydrogen boiler system, providing dedicated equipment for cooling and heating the aromatic compounds increases the cost and energy consumption of the hydrogen boiler system.

[0005] The technology disclosed in this specification aims to suppress increases in costs and energy consumption of hydrogen boiler systems. [Means for solving the problem]

[0006] This specification discloses a control device for a hydrogen boiler system. The hydrogen boiler system includes a reaction tower containing an aromatic compound capable of storing and releasing hydrogen, a water supply tank containing water, and a hydrogen boiler that burns the hydrogen supplied from the reaction tower to obtain water from the water supply tank. The control device for the hydrogen boiler system supplies water from the water supply tank to the reaction tower when storing hydrogen, and supplies high-temperature fluid from the hydrogen boiler to the reaction tower when releasing hydrogen. [Effects of the Invention]

[0007] The technology disclosed in this specification suppresses increases in the cost and energy consumption of hydrogen boiler systems. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram schematically illustrating a hydrogen boiler system according to an embodiment. [Figure 2] FIG. 2 is a block diagram showing a part of the hydrogen boiler system according to the embodiment. [Figure 3] FIG. 3 is a diagram illustrating the operation of the hydrogen boiler system according to the embodiment. [Figure 4] FIG. 4 is a diagram illustrating the operation of the hydrogen boiler system according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Hydrogen boiler system] Fig. 1 is a diagram schematically showing a hydrogen boiler system 1 according to an embodiment of the present invention. Fig. 2 is a block diagram showing a part of the hydrogen boiler system 1 according to an embodiment of the present invention.

[0010] As shown in Figures 1 and 2, the hydrogen boiler system 1 includes a hydrogen production device 2, a reaction tower 3, a water supply tank 4, a hydrogen boiler 5, an economizer 6, a header 7, steam-using equipment 8, a steam trap 9, a control device 10, a first pressure sensor 11, a second pressure sensor 12, and a header pressure sensor 13.

[0011] The hydrogen production device 2 generates hydrogen Fg. Examples of the hydrogen production device 2 include an alkaline water electrolysis device, a solid polymer water electrolysis device, and a high-temperature water electrolysis device.

[0012] The reaction tower 3 contains an aromatic compound capable of storing and releasing hydrogen Fg. The aromatic compound is a material capable of reversibly storing and releasing hydrogen Fg. The aromatic compound releases heat when storing hydrogen Fg and releases the stored hydrogen Fg by absorbing heat. In other words, the aromatic compound generates heat when storing hydrogen Fg. The aromatic compound releases hydrogen Fg when heated from the outside.

[0013] Aromatic compounds store hydrogen by being hydrogenated and release hydrogen by being dehydrogenated. Hydrogenation refers to a chemical reaction in which hydrogen is added to the molecules of an aromatic compound. Dehydrogenation refers to a chemical reaction in which hydrogen contained in an aromatic compound is removed. Examples of aromatic compounds (substances to be hydrogenated) before hydrogenation include benzene, toluene, xylene, mesitylene, naphthalene, methylnaphthalene, anthracene, or combinations thereof. In this embodiment, the aromatic compound before hydrogenation is toluene. Hydrogenation of toluene produces methylcyclohexane (MCH) as a hydrogen carrier.

[0014] In the embodiment, the reaction tower 3 includes a first reaction tower 31 and a second reaction tower 32. The first reaction tower 31 is connected to the hydrogen production apparatus 2 via a first hydrogen line 21. The second reaction tower 32 is connected to the hydrogen production apparatus 2 via a second hydrogen line 22. A first valve 81 is disposed in the first hydrogen line 21. A second valve 82 is disposed in the second hydrogen line 22. When the first valve 81 is opened, hydrogen Fg generated in the hydrogen production apparatus 2 is supplied to the first reaction tower 31 via the first hydrogen line 21. When the second valve 82 is opened, hydrogen Fg generated in the hydrogen production apparatus 2 is supplied to the second reaction tower 32 via the second hydrogen line 22. When the first valve 81 is closed, hydrogen Fg is not supplied from the hydrogen production apparatus 2 to the first reaction tower 31. When the second valve 82 is closed, hydrogen Fg is not supplied from the hydrogen production apparatus 2 to the second reaction tower 32.

[0015] The water supply tank 4 stores water. The water supply tank 4 is connected to the first reaction tower 31 via a first hot water line 41. The water supply tank 4 is connected to the second reaction tower 32 via a second hot water line .

[0016] The hydrogen boiler 5 combusts the hydrogen Fg supplied from the reaction tower 3. The hydrogen boiler 5 obtains feedwater from the feedwater tank 4. The hydrogen boiler 5 combusts the hydrogen Fg supplied from the reaction tower 3 to heat the water supplied from the feedwater tank 4 to generate steam Fv. The hydrogen boiler 5 is connected to the first reaction tower 31 via a third hydrogen line 23. The hydrogen boiler 5 is connected to the second reaction tower 32 via a fourth hydrogen line 24. The hydrogen boiler 5 is connected to the feedwater tank 4 via a feedwater line 33.

[0017] The economizer 6 preheats the water supplied from the feedwater tank 4 to the hydrogen boiler 5 with the exhaust gas from the hydrogen boiler 5. Exhaust gas is generated by the combustion of hydrogen Fg in the hydrogen boiler 5. The exhaust gas generated in the hydrogen boiler 5 is discharged via an exhaust line 34. The economizer 6 preheats the water supplied from the feedwater tank 4 to the hydrogen boiler 5 via a feedwater line 33 with the exhaust gas flowing through the exhaust line 34.

[0018] The header 7 accommodates the steam Fv generated in the hydrogen boiler 5. The header 7 is connected to the hydrogen boiler 5 via a first steam line 51.

[0019] The steam-using equipment 8 uses the steam Fv supplied from the header 7. The steam-using equipment 8 is connected to the header 7 via a second steam line 52. Examples of the steam-using equipment 8 include a steam sterilizer or a food processor.

[0020] The steam trap 9 recovers the steam Fv released from the steam-using equipment 8 and generates condensed water Fc. The condensed water Fc generated in the steam trap 9 is condensed water generated by condensing at least a portion of the steam Fv generated by the hydrogen boiler 5.

[0021] The water supply tank 4 is connected to the first reaction tower 31 via a first room-temperature water line 71. The water supply tank 4 is connected to the second reaction tower 32 via a second room-temperature water line 72. A third valve 83 is disposed on the first room-temperature water line 71. A fourth valve 84 is disposed on the second room-temperature water line 72. When the third valve 83 is opened, the water contained in the water supply tank 4 is supplied to the first reaction tower 31 via the first room-temperature water line 71. When the fourth valve 84 is opened, the water contained in the water supply tank 4 is supplied to the second reaction tower 32 via the second room-temperature water line 72. When the third valve 83 is closed, water is not supplied from the water supply tank 4 to the first reaction tower 31. When the fourth valve 84 is closed, water is not supplied from the water supply tank 4 to the second reaction tower 32.

[0022] The steam trap 9 is connected to the first reaction tower 31 via a first condensed water line 61. The steam trap 9 is connected to the second reaction tower 32 via a second condensed water line 62. A fifth valve 85 is disposed in the first condensed water line 61. A sixth valve 86 is disposed in the second condensed water line 62. When the fifth valve 85 is opened, the condensed water Fc obtained in the steam trap 9 is supplied to the first reaction tower 31 via the first condensed water line 61. When the sixth valve 86 is opened, the condensed water Fc obtained in the steam trap 9 is supplied to the second reaction tower 32 via the second condensed water line 62. When the fifth valve 85 is closed, the condensed water Fc is not supplied from the steam trap 9 to the first reaction tower 31. When the sixth valve 86 is closed, the condensed water Fc is not supplied from the steam trap 9 to the first reaction tower 31.

[0023] The first pressure sensor 11 detects the pressure in the first reaction tower 31. The detected value of the first pressure sensor 11 is transmitted to the control device 10.

[0024] The second pressure sensor 12 detects the pressure in the second reaction tower 32. The detected value of the second pressure sensor 12 is transmitted to the control device 10.

[0025] The header pressure sensor 13 detects the pressure in the header 7. The detected value of the header pressure sensor 13 is sent to the control device 10.

[0026] The control device 10 controls the hydrogen boiler system 1. The control device 10 controls the first valve 81, the second valve 82, the third valve 83, the fourth valve 84, the fifth valve 85, and the sixth valve 86, respectively.

[0027] [Hydrogen boiler system operation] 3 and 4 are diagrams illustrating the operation of the hydrogen boiler system 1 according to the embodiment. In the hydrogen boiler system 1, room temperature water Fr, hot water Fh, and condensed water Fc flow. The temperature of the hot water Fh is higher than the temperature of the room temperature water Fr. The temperature of the condensed water Fc is higher than the temperature of the hot water Fh.

[0028] In the embodiment, when hydrogen Fg released from the aromatic compounds in the first reaction tower 31 is supplied to the hydrogen boiler 5, the control device 10 causes the aromatic compounds in the second reaction tower 32 to store the hydrogen Fg. When hydrogen Fg released from the second reaction tower 32 is supplied to the hydrogen boiler 5, the control device 10 causes the aromatic compounds in the first reaction tower 31 to store the hydrogen Fg. FIG. 3 shows the operation of the hydrogen boiler system 1 when hydrogen Fg is released from the aromatic compounds in the first reaction tower 31 and the aromatic compounds in the second reaction tower 32 are stored. FIG. 4 shows the operation of the hydrogen boiler system 1 when hydrogen Fg is released from the aromatic compounds in the second reaction tower 32 and the aromatic compounds in the first reaction tower 31 are stored.

[0029] As shown in FIG. 3, when hydrogen Fg is stored in the aromatic compounds in the second reaction tower 32 and hydrogen Fg is released from the aromatic compounds in the first reaction tower 31, the control device 10 closes the first valve 81 and opens the second valve 82.

[0030] Room temperature water Fr is stored in the water supply tank 4. The control device 10 supplies the room temperature water Fr from the water supply tank 4 to the second reaction tower 32 when storing hydrogen Fg in the second reaction tower 32. The control device 10 opens the fourth valve 84 so that the room temperature water Fr from the water supply tank 4 is supplied to the second reaction tower 32 when storing hydrogen Fg in the second reaction tower 32. By opening the fourth valve 84, the room temperature water Fr from the water supply tank 4 is supplied to the second reaction tower 32 via the second room temperature water line 72. The control device 10 closes the third valve 83 so that the room temperature water Fr from the water supply tank 4 is not supplied to the first reaction tower 31.

[0031] In releasing hydrogen Fg in the first reaction tower 31, the control device 10 supplies high-temperature fluid from the hydrogen boiler 5 to the first reaction tower 31. The high-temperature fluid from the hydrogen boiler 5 supplied to the first reaction tower 31 is condensed water Fc obtained by condensing at least a portion of the steam Fv generated by the hydrogen boiler 5. As described above, the steam Fv generated in the hydrogen boiler 5 is supplied to the steam trap 9 via the header 7 and the steam-using equipment 8. The steam Fv generated in the hydrogen boiler 5 is condensed in the steam trap 9. The high-temperature fluid supplied to the first reaction tower 31 is condensed water Fc obtained in the steam trap 9. The control device 10 opens the fifth valve 85 so that the condensed water Fc obtained in the steam trap 9 is supplied to the first reaction tower 31. By opening the fifth valve 85, the condensed water Fc from the steam trap 9 is supplied to the first reaction tower 31 via the first condensed water line 61. The control device 10 closes the sixth valve 86 so that the condensed water Fc obtained in the steam trap 9 is not supplied to the second reaction tower 32.

[0032] The aromatic compounds before being hydrogenated generate heat when storing hydrogen Fg. The room temperature water Fr supplied from the water supply tank 4 to the second reaction tower 32 is heated by the aromatic compounds in the second reaction tower 32. In storing hydrogen Fg in the second reaction tower 32, the control device 10 converts the room temperature water Fr supplied from the water supply tank 4 to the second reaction tower 32 into hot water Fh and then returns the water to the water supply tank 4. The room temperature water Fr supplied from the water supply tank 4 to the second reaction tower 32 via the second room temperature water line 72 is heated in the second reaction tower 32 and converted into hot water Fh, and then returned to the water supply tank 4 via the second hot water line 42.

[0033] The aromatic compounds after hydrogenation are heated from the outside and release hydrogen Fg. The aromatic compounds in the first reaction tower 31 are heated by the condensed water Fc from the steam trap 9 and release hydrogen Fg. The hydrogen Fg released from the aromatic compounds in the first reaction tower 31 is supplied to the hydrogen boiler 5 via the third hydrogen line 23. In releasing the hydrogen Fg in the first reaction tower 31, the control device 10 supplies the condensed water Fc supplied to the first reaction tower 31 to the water supply tank 4. The condensed water Fc supplied from the steam trap 9 to the first reaction tower 31 is converted into hot water Fh by (indirect) heat exchange with the aromatic compounds in the first reaction tower 31. The hot water Fh sent out from the first reaction tower 31 is supplied to the water supply tank 4 via the first hot water line 41.

[0034] The water supply tank 4 contains hot water Fh supplied from the first reaction tower 31 via a first hot water line 41 and hot water Fh supplied from the second reaction tower 32 via a second hot water line 42. The hot water Fh contained in the water supply tank 4 is supplied to the hydrogen boiler 5 via a water supply line 33.

[0035] As shown in FIG. 4, when hydrogen Fg is stored in the aromatic compounds in the first reaction tower 31 and hydrogen Fg is released to the aromatic compounds in the second reaction tower 32, the control device 10 closes the second valve 82 and opens the first valve 81.

[0036] The control device 10 supplies room temperature water Fr from the water supply tank 4 to the first reaction tower 31 during storage of hydrogen Fg in the first reaction tower 31. The control device 10 opens the third valve 83 so that room temperature water Fr from the water supply tank 4 is supplied to the first reaction tower 31 during storage of hydrogen Fg in the first reaction tower 31. By opening the third valve 83, room temperature water Fr from the water supply tank 4 is supplied to the first reaction tower 31 via the first room temperature water line 71. The control device 10 closes the fourth valve 84 so that room temperature water Fr from the water supply tank 4 is not supplied to the second reaction tower 32.

[0037] In releasing hydrogen Fg in the second reaction tower 32, the control device 10 supplies a high-temperature fluid from the hydrogen boiler 5 to the second reaction tower 32. The high-temperature fluid supplied to the second reaction tower 32 is the condensed water Fc obtained in the steam trap 9. The control device 10 opens the sixth valve 86 so that the condensed water Fc obtained in the steam trap 9 is supplied to the second reaction tower 32. By opening the sixth valve 86, the condensed water Fc from the steam trap 9 is supplied to the second reaction tower 32 via the second condensed water line 62. The control device 10 closes the fifth valve 85 so that the condensed water Fc obtained in the steam trap 9 is not supplied to the first reaction tower 31.

[0038] The aromatic compounds before being hydrogenated generate heat when storing hydrogen Fg. The room temperature water Fr supplied from the water supply tank 4 to the first reaction tower 31 is heated by the aromatic compounds in the first reaction tower 31. In storing hydrogen Fg in the first reaction tower 31, the control device 10 converts the room temperature water Fr supplied from the water supply tank 4 to the first reaction tower 31 into hot water Fh and then returns the water to the water supply tank 4. The room temperature water Fr supplied from the water supply tank 4 to the first reaction tower 31 via the first room temperature water line 71 is heated in the first reaction tower 31 and converted into hot water Fh, and then returned to the water supply tank 4 via the first hot water line 41.

[0039] The aromatic compounds after hydrogenation are heated from the outside and release hydrogen Fg. The aromatic compounds in the second reaction tower 32 are heated by the condensed water Fc from the steam trap 9 and release hydrogen Fg. The hydrogen Fg released from the aromatic compounds in the second reaction tower 32 is supplied to the hydrogen boiler 5 via the fourth hydrogen line 24. In releasing the hydrogen Fg in the second reaction tower 32, the control device 10 supplies the condensed water Fc supplied to the second reaction tower 32 to the water supply tank 4. The condensed water Fc supplied from the steam trap 9 to the second reaction tower 32 is converted into hot water Fh by (indirect) heat exchange with the aromatic compounds in the second reaction tower 32. The hot water Fh sent out from the second reaction tower 32 is supplied to the water supply tank 4 via the second hot water line 42.

[0040] The water supply tank 4 contains hot water Fh supplied from the first reaction tower 31 via a first hot water line 41 and hot water Fh supplied from the second reaction tower 32 via a second hot water line 42. The hot water Fh contained in the water supply tank 4 is supplied to the hydrogen boiler 5 via a water supply line 33.

[0041] As described above, the control device 10 can switch the hydrogen boiler system 1 between the state shown in Fig. 3 and the state shown in Fig. 4. As shown in Fig. 3, when the amount of hydrogen Fg stored in the second reaction tower 32 is equal to or less than the first threshold and the amount of hydrogen Fg stored in the first reaction tower 31 is greater than the first threshold, the control device 10 causes the aromatic compounds in the second reaction tower 32 to store hydrogen Fg and causes the aromatic compounds in the first reaction tower 31 to release hydrogen Fg. As shown in Fig. 4, when the amount of hydrogen Fg stored in the first reaction tower 31 is equal to or less than the first threshold and the amount of hydrogen Fg stored in the second reaction tower 32 is greater than the first threshold, the control device 10 causes the aromatic compounds in the first reaction tower 31 to store hydrogen Fg and causes the aromatic compounds in the second reaction tower 32 to release hydrogen Fg.

[0042] That is, when the amount of hydrogen Fg stored in the second reaction tower 32 is small and the amount of hydrogen Fg stored in the first reaction tower 31 is large, the control device 10 causes the aromatic compounds in the second reaction tower 32 to store the hydrogen Fg and causes the aromatic compounds in the first reaction tower 31 to release the hydrogen Fg. When the amount of hydrogen Fg stored in the first reaction tower 31 is small and the amount of hydrogen Fg stored in the second reaction tower 32 is large, the control device 10 causes the aromatic compounds in the first reaction tower 31 to store the hydrogen Fg and causes the aromatic compounds in the second reaction tower 32 to release the hydrogen Fg. Because a state in which hydrogen Fg is sufficiently stored in at least one of the first reaction tower 31 and the second reaction tower 32 is maintained, the control device 10 can operate the hydrogen boiler 5 stably.

[0043] The control device 10 can estimate the storage amount of hydrogen Fg in the first reaction tower 31 based on the detection value of the first pressure sensor 11 that detects the pressure in the first reaction tower 31. The control device 10 can estimate the storage amount of hydrogen Fg in the second reaction tower 32 based on the detection value of the second pressure sensor 12 that detects the pressure in the second reaction tower 32. The control device 10 can switch the hydrogen boiler system 1 between the state shown in Fig. 3 and the state shown in Fig. 4 by comparing the estimated storage amounts of hydrogen Fg in the first reaction tower 31 and the second reaction tower 32 with first threshold values.

[0044] When the amount of hydrogen Fg stored in each of the first reaction tower 31 and the second reaction tower 32 exceeds a first threshold value and the detection value of the header pressure sensor 13 that detects the pressure of the header 7 containing the steam Fv generated in the hydrogen boiler 5 exceeds a second threshold value, the control device 10 stops operation of the hydrogen production device 2 that supplies hydrogen Fg to the first reaction tower 31 and the second reaction tower 32.

[0045] That is, when a large amount of hydrogen Fg is stored in each of the first reaction tower 31 and the second reaction tower 32 and the amount of steam used by the steam-using equipment 8 is small, the control device 10 stops the operation of the hydrogen production device 2. When a large amount of hydrogen Fg is stored in the reaction tower 3 and the amount of steam used by the steam-using equipment 8 is small, the hydrogen production device 2 does not need to produce hydrogen Fg. When a large amount of hydrogen Fg is stored in the reaction tower 3 and the amount of steam used by the steam-using equipment 8 is small, the operation of the hydrogen production device 2 is stopped, and the amount of power consumed to operate the hydrogen production device 2 is reduced.

[0046] [effect] As described above, in the embodiment, the hydrogen boiler system 1 includes the reaction tower 3 that contains aromatic compounds capable of storing and releasing hydrogen Fg, the water supply tank 4 that contains water, and the hydrogen boiler 5 that obtains feedwater from the water supply tank 4 by combusting the hydrogen Fg supplied from the reaction tower 3. When storing hydrogen Fg, the control device 10 of the hydrogen boiler system 1 supplies water from the water supply tank 4 to the reaction tower 3. When releasing hydrogen Fg, the control device 10 supplies condensed water Fc, which is a high-temperature fluid, from the hydrogen boiler 5 to the reaction tower 3.

[0047] The aromatic compounds generate heat when storing hydrogen Fg. When storing hydrogen Fg in the aromatic compounds, the aromatic compounds in the reaction tower 3 are cooled by water from the water supply tank 4. When the aromatic compounds are heated from the outside, they release hydrogen Fg. When releasing hydrogen Fg, the aromatic compounds in the reaction tower 3 are heated by condensed water Fc from the steam trap 9. When aromatic compounds are used in the hydrogen boiler system 1, there is no need to install dedicated devices for cooling and heating the aromatic compounds, which prevents increases in the cost and energy consumption of the hydrogen boiler system 1.

[0048] [Other embodiments] In the above-described embodiment, in the release of hydrogen Fg, condensed water Fc from the steam trap 9 is supplied to the reaction tower 3 as a high-temperature fluid, and the aromatic compounds are heated by the condensed water Fc. In the release of hydrogen Fg from the aromatic compounds, the high-temperature fluid that heats the aromatic compounds may be exhaust gas generated by combustion of hydrogen Fg in the hydrogen boiler 5. That is, the exhaust gas discharged from the hydrogen boiler 5 to the exhaust line 34 may be used to heat the aromatic compounds. The aromatic compounds are heated by the exhaust gas, and hydrogen Fg is released from the aromatic compounds.

[0049] In the above-described embodiment, the hydrogen boiler 5 combusts the hydrogen Fg supplied from the reaction tower 3 and heats the water supplied from the water supply tank 4 to generate steam Fv. The hydrogen boiler 5 may also combust the hydrogen Fg supplied from the reaction tower 3 and heat the water supplied from the water supply tank 4 to generate hot water. [Explanation of symbols]

[0050] 1...hydrogen boiler system, 2...hydrogen production equipment, 3...reaction tower, 4...water supply tank, 5...hydrogen boiler, 6...economizer, 7...header, 8...steam-using equipment, 9...steam trap, 10...control device, 11...first pressure sensor, 12...second pressure sensor, 13...header pressure sensor, 21...first hydrogen line, 22...second hydrogen line, 23...third hydrogen line, 24...fourth hydrogen line, 31...first reaction tower, 32...second reaction tower, 33...water supply line , 34...exhaust line, 41...first hot water line, 42...second hot water line, 51...first steam line, 52...second steam line, 61...first condensate line, 62...second condensate line, 71...first room temperature water line, 72...second room temperature water line, 81...first valve, 82...second valve, 83...third valve, 84...fourth valve, 85...fifth valve, 86...sixth valve, Fc...condensed water, Fg...hydrogen, Fh...hot water, Fr...room temperature water, Fv...steam.

Claims

1. a reaction column containing an aromatic compound capable of storing and releasing hydrogen; a water tank for storing water; a hydrogen boiler that burns hydrogen supplied from the reaction tower and obtains feedwater from the feedwater tank, In storing the hydrogen, water from the water supply tank is supplied to the reaction tower; In the hydrogen release step, high-temperature fluid from the hydrogen boiler is supplied to the reaction tower. Hydrogen boiler system control device.

2. The high-temperature fluid is condensed water produced by condensing at least a portion of the steam produced by the hydrogen boiler. The control device for a hydrogen boiler system according to claim 1.

3. The high-temperature fluid is exhaust gas generated by combustion of the hydrogen. The control device for a hydrogen boiler system according to claim 2.

4. In storing the hydrogen, the water supplied from the water supply tank to the reaction tower is returned to the water supply tank. The control device for a hydrogen boiler system according to claim 1.

5. In the release of hydrogen, the high-temperature fluid supplied to the reaction tower is supplied to the water supply tank. The control device for a hydrogen boiler system according to claim 2.

6. The reaction tower includes a first reaction tower and a second reaction tower, When hydrogen released from the aromatic compound in the first reaction tower is supplied to the hydrogen boiler, hydrogen is stored in the aromatic compound in the second reaction tower; When hydrogen released from the aromatic compound in the second reaction tower is supplied to the hydrogen boiler, hydrogen is stored in the aromatic compound in the first reaction tower. The control device for a hydrogen boiler system according to claim 1.

7. When the amount of hydrogen stored in the second reaction tower becomes equal to or less than a first threshold value and the amount of hydrogen stored in the first reaction tower exceeds the first threshold value, hydrogen is stored in the aromatic compound in the second reaction tower; When the amount of hydrogen stored in the first reaction tower is equal to or less than a first threshold and the amount of hydrogen stored in the second reaction tower is greater than a first threshold, hydrogen is stored in the aromatic compound in the first reaction tower. The control device for a hydrogen boiler system according to claim 6.

8. a hydrogen storage amount in the first reaction tower is estimated based on a detection value of a first pressure sensor that detects the pressure in the first reaction tower, and a hydrogen storage amount in the second reaction tower is estimated based on a detection value of a second pressure sensor that detects the pressure in the second reaction tower; The control device for a hydrogen boiler system according to claim 7.

9. when the amount of hydrogen stored in each of the first reaction tower and the second reaction tower exceeds a first threshold value and a detection value of a header pressure sensor that detects the pressure of a header that accommodates steam generated in the hydrogen boiler exceeds a second threshold value, the operation of the hydrogen production device that supplies hydrogen to the first reaction tower and the second reaction tower is stopped. The control device for a hydrogen boiler system according to claim 7.

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