JP2008144254A - Hydrogen generation system and adsorption device regeneration method thereof - Google Patents

Abstract

The present invention makes it possible to economically perform a regeneration process of an adsorption portion and to simplify the configuration.
An adsorption device 22 includes a first adsorption tower 50a and a second adsorption tower 50b, a first catalytic combustion section 52a and a second catalytic tower 52a which are heated to regenerate the first adsorption tower 50a and the second adsorption tower 50b. A part of the high-pressure gas is moved from the first adsorption tower 50a to the second adsorption tower 50b, or from the second adsorption tower 50b to the first adsorption tower 50a. Fuel supply capable of supplying the inter-adsorption portion gas moving mechanism 54 and the gas in the first adsorption tower 50a and the second adsorption tower 50b as fuel to the first catalytic combustion portion 52a and the second catalytic combustion portion 52b. Mechanisms 64a and 64b are provided.
[Selection] Figure 1

Description

  The present invention includes a water electrolysis unit that electrolyzes water to generate high-pressure hydrogen, a gas-liquid separation unit that removes moisture from the generated hydrogen, and moisture contained in the hydrogen derived from the gas-liquid separation unit The present invention relates to a hydrogen generation system including an adsorption device that adsorbs and removes adsorbent, and a method for regenerating the adsorption device.

  In recent years, a system for supplying electric power or power using hydrogen as a fuel, for example, a fuel cell system has been proposed. In order to produce hydrogen as a fuel, a water electrolysis apparatus that generates hydrogen (and oxygen) by electrolyzing water is used.

  In this water electrolysis apparatus, hydrogen containing moisture is produced, and in order to obtain dry hydrogen (hereinafter also referred to as dry hydrogen), it is necessary to remove moisture from the hydrogen. Therefore, for example, an apparatus disclosed in Patent Document 1 is known.

  As shown in FIG. 10, this apparatus includes a membrane deaeration module 1 for degassing a gas in pure water produced by pure water production means (not shown), and a deaeration treatment by the membrane deaeration module 1. A water electrolysis cell 2 for membrane electrolyzing the purified water, and molecular sieves 3a to 3d for dehumidifying oxygen generated from the anode of the water electrolysis cell 2 and hydrogen generated from the cathode individually. For this reason, the high purity hydrogen and oxygen generated from the water electrolysis cell 2 are dehumidified by the molecular sieves 3a, 3b and 3c, 3d which are dehumidifying means.

JP-A-5-287570 (FIG. 2)

  However, in the above-mentioned Patent Document 1, for example, two molecular sieves 3a and 3b are provided to perform dehumidification of hydrogen. Work to activate in order to regenerate 3a, 3b is necessary.

  For this reason, it is necessary to heat-treat the molecular sieves 3a and 3b for a relatively long time under a predetermined reduced pressure. Accordingly, there is a problem that it takes a considerable time for activation, and the operation of the entire apparatus is stopped during the activation, which is not efficient.

  The present invention solves this type of problem, and provides a hydrogen generation system and an adsorption device regeneration method capable of simplifying the configuration while economically performing the regeneration process of the adsorption unit. Objective.

  The present invention includes a water electrolysis unit that electrolyzes water to generate high-pressure hydrogen, a gas-liquid separation unit that removes moisture from the generated high-pressure hydrogen, and the high-pressure hydrogen that is derived from the gas-liquid separation unit. The present invention relates to a hydrogen generation system including an adsorption device that adsorbs and removes moisture contained therein. Here, high-pressure hydrogen refers to hydrogen of 1 MPa to 70 MPa.

  The adsorption device includes at least a first adsorption unit and a second adsorption unit that are selectively connected to the gas-liquid separation unit, a first combustion unit that heats to regenerate the first adsorption unit and the second adsorption unit, and During regeneration of the second combustion unit and the adsorption device, a part of the high-pressure gas in the first adsorption unit is in the second adsorption unit, or a part of the high-pressure gas in the second adsorption unit is in the first adsorption unit. A gas moving mechanism between the adsorbing parts to be moved, and a fuel supply mechanism capable of supplying the gas in the first adsorbing part and the second adsorbing part as fuel to the first combustion part and the second combustion part are provided. . Here, the high pressure gas refers to a gas of 1 MPa to 70 MPa mainly containing hydrogen and moisture.

  The present invention also provides a water electrolysis unit that electrolyzes water to generate high-pressure hydrogen, a gas-liquid separation unit that removes moisture from the generated high-pressure hydrogen, and the high-pressure derived from the gas-liquid separation unit An adsorption device that adsorbs and removes moisture contained in hydrogen, and the adsorption device includes at least a first adsorption unit and a second adsorption unit that are selectively connected to the gas-liquid separation unit, and the first adsorption unit. A first combustion section and a second combustion section that are heated to regenerate the adsorption section and the second adsorption section, and a part of the high-pressure gas in the first adsorption section is regenerated in the second adsorption section during regeneration of the adsorption device. Or a gas moving mechanism between the adsorbing parts for moving a part of the high-pressure gas in the second adsorbing part into the first adsorbing part, and the gas in the first adsorbing part and the second adsorbing part as the first combustion. Supply mechanism capable of supplying fuel as a fuel to the combustion section and the second combustion section It relates adsorber regeneration process of the hydrogen generating system provided.

  In the adsorption device regeneration method of the present invention, when the first adsorption unit is regenerated, a step of moving the high-pressure gas in the first adsorption unit to the second adsorption unit by a predetermined amount, and the remaining gas in the first adsorption unit And supplying the first combustion section as fuel and supplying the gas in the second adsorption section into the first adsorption section.

  Further, the adsorption device regeneration method of the present invention includes a step of moving the high-pressure gas in the first adsorption unit by a predetermined amount to the second adsorption unit when regenerating the first adsorption unit, A step of heating through one combustion section and discharging the remaining gas in the first adsorption section.

  Furthermore, the adsorption device regeneration method of the present invention includes a step of moving the high pressure gas in the first adsorption unit by a predetermined amount to the second adsorption unit when regenerating the first adsorption unit, and the first adsorption unit. Heating through the first combustion section and discharging the remaining gas in the first adsorption section; and supplying the gas in the second adsorption section as fuel to the first combustion section. ing.

  The present invention also provides a water electrolysis unit that electrolyzes water to generate high-pressure hydrogen, a gas-liquid separation unit that removes moisture from the generated high-pressure hydrogen, and the high-pressure derived from the gas-liquid separation unit An adsorption device that adsorbs and removes moisture contained in hydrogen, and the adsorption device includes at least a first adsorption unit and a second adsorption unit that are selectively connected to the gas-liquid separation unit, and the first adsorption unit. The first combustion unit and the second combustion unit that are heated to regenerate the adsorption unit and the second adsorption unit, and a part of the high-pressure gas in the first adsorption unit or the second adsorption during regeneration of the adsorption device A hydrogen generation system comprising: an auxiliary tank into which a part of the high-pressure gas in the section flows, and a fuel supply mechanism capable of supplying the gas in the auxiliary tank to the first combustion section and the second combustion section as fuel. The present invention relates to a suction device regeneration method.

  In the adsorption device regeneration method of the present invention, when regenerating the first adsorption unit, the step of moving the high-pressure gas in the first adsorption unit by a predetermined amount to the auxiliary tank, and the remaining gas in the first adsorption unit, A step of supplying the first combustion section as fuel, and a step of supplying the gas in the auxiliary tank into the first adsorption section.

  According to the present invention, when the first adsorption unit is regenerated, first, the high-pressure gas in the first adsorption unit is moved to the second adsorption unit by a predetermined amount (for example, half the amount), and then the first adsorption unit. Part reproduction processing has been started. For this reason, the gas pressure in the first adsorption unit is reduced, and the energy loss of hydrogen discharged from the first adsorption unit by the regeneration process can be effectively reduced.

  Moreover, gas is supplied from the first adsorption unit to the second adsorption unit, and the pressure inside the second adsorption unit is increased. Accordingly, the inside of the second adsorption unit can be quickly increased to a desired pressure, and dry hydrogen can be sent out from the second adsorption unit. Thereby, the efficiency improvement of the whole hydrogen production | generation process is performed easily.

  According to the present invention, the gas remaining in the first adsorption unit or the second adsorption unit is supplied as fuel to the first combustion unit for heating and regenerating the first adsorption unit. Accordingly, the equipment required for the heat regeneration process can be reduced to a minimum, and the energy consumed for the heat regeneration process can be favorably reduced, which is economical.

  Further, according to the present invention, for example, when the first adsorption unit is regenerated, first, the high pressure gas in the first adsorption unit is moved to the auxiliary tank by a predetermined amount (for example, half the amount), and then the first adsorption unit is regenerated. The regeneration process for one adsorption unit has been started. For this reason, the hydrogen production process by the second adsorption unit is performed while the regeneration process in the first adsorption unit is performed, and the continuous operation by the adsorption device becomes possible.

  FIG. 1 is a schematic configuration explanatory diagram of a hydrogen generation system 10 to which the adsorption device regeneration method according to the first to third embodiments of the present invention is applied.

  The hydrogen generation system 10 is supplied with pure water generated from city water via a pure water supply device 12, and electrolyzes the pure water to produce high-pressure hydrogen and a water electrolysis device (water electrolysis unit) 14. A gas-liquid separator (gas-liquid separator) 18 that removes water contained in the high-pressure hydrogen led out from the water electrolysis device 14 to the hydrogen lead-out path 16, and a hydrogen supply path 20 from the gas-liquid separator 18. An adsorption device 22 that adsorbs and removes moisture contained in the supplied hydrogen, and a hydrogen tank 26 that can store the hydrogen (dry hydrogen) led to a dry hydrogen supply path 24 that communicates with the adsorption device 22. Prepare. Note that the hydrogen tank 26 may be provided as necessary, and the hydrogen tank 26 may be deleted.

  In the water electrolysis apparatus 14, a plurality of water decomposition cells 28 are stacked, and pipes 30 a, 30 b and 30 c are connected to one end of the water decomposition cell 28 in the stacking direction. The pipes 30 a and 30 b communicate with the pure water supply device 12 to circulate pure water, while the pipe 30 c is connected to the gas-liquid separator 18 through the hydrogen lead-out path 16. A valve 32 is disposed in the hydrogen lead-out path 16. One end of a pure water circulation path 34 is connected to the gas-liquid separator 18, and the pure water circulation path 34 is connected to a pipe 30 a of the water electrolysis apparatus 14 via the pure water supply device 12. Drain valves 36 a and 36 b communicating with the pure water circulation path 34 are provided at the bottom of the gas-liquid separator 18.

  The adsorption device 22 adsorbs water vapor (moisture) contained in hydrogen by a physical adsorption action, and also includes a first adsorption tower (adsorption part) 50a filled with a moisture adsorbent regenerated by evaporating and desorbing moisture by heating. A second adsorption tower 50b is provided. As the moisture adsorbent, for example, activated carbon, synthetic zeolite, porous alumina, or silica is used. As the first adsorption tower 50a and the second adsorption tower 50b, a heated adsorption tower of a TSA (Thermal Swing Adsorption) apparatus is usually used.

  Cylindrical first catalytic combustion section 52a and second catalytic combustion section 52b are arranged around the first adsorption tower 50a and the second adsorption tower 50b. Between the hydrogen supply path 20 and the first adsorption tower 50a and the second adsorption tower 50b, the inside of the first adsorption tower 50a into the second adsorption tower 50b or the inside of the second adsorption tower 50b An inter-adsorption portion gas moving mechanism 54 for moving a part of the high-pressure gas into the first adsorption tower 50a is provided. The inter-adsorption portion gas transfer mechanism 54 includes a valve 56a provided in the hydrogen supply passage 20, and valves 56b and 56c provided in the hydrogen branch passages 20a and 20b that branch on the outlet side of the valve 56a.

  Dry hydrogen branch paths 24a and 24b that join the dry hydrogen supply path 24 are provided on the outlet side of the first adsorption tower 50a and the second adsorption tower 50b. Valves 58 a and 58 b are disposed in the dry hydrogen branch paths 24 a and 24 b, and a valve 58 c is disposed in the dry hydrogen supply path 24.

  For example, fuel supply paths 62a and 62b communicating with the first catalytic combustion section 52a and the second catalytic combustion section 52b are connected to the dry hydrogen branch paths 24a and 24b via three-way switching valves 60a and 60b, for example. The three-way switching valves 60a and 60b and the fuel supply paths 62a and 62b constitute fuel supply mechanisms 64a and 64b.

  A fuel supply path 66 is connected to the hydrogen tank 26 via a valve 68. The fuel supply path 66 can be connected to the fuel tank of the fuel cell vehicle 70 directly or via a storage tank (not shown).

  The operation of the hydrogen generation system 10 configured as described above will be described below.

  First, in the pure water supply device 12, pure water is led to the pure water circulation path 34, and this pure water is supplied into the water electrolysis device 14 from the pipe 30a. In the water electrolysis apparatus 14, water is decomposed by electricity in each water splitting cell 28 to obtain high-pressure hydrogen (1 MPa to 70 MPa), and this high-pressure hydrogen can be taken out of the water electrolysis apparatus 14 through the pipe 30c. It becomes. On the other hand, the oxygen produced by the reaction and the used water are returned to the pure water supply device 12 via the pipe 30b.

  As shown in FIG. 2, relatively high-pressure hydrogen containing water vapor generated by the water electrolysis device 14 is sent to the gas-liquid separator 18 via the hydrogen lead-out path 16. In the gas-liquid separator 18, water vapor contained in hydrogen is separated from the hydrogen and returned to the pure water circulation path 34, while the hydrogen is supplied to the hydrogen supply path 20.

  The hydrogen supplied to the hydrogen supply path 20 is sent to the adsorption device 22. In the adsorption device 22, for example, the valves 56a and 56b are opened, and the valve 56c is closed to introduce hydrogen into the first adsorption tower 50a. In the first adsorption tower 50a, water vapor contained in hydrogen is adsorbed to obtain dry hydrogen (dry hydrogen), which is led out from the dry hydrogen branch path 24a to the dry hydrogen supply path 24.

  The dry hydrogen led out to the dry hydrogen supply path 24 is stored in the hydrogen tank 26. The dry hydrogen stored in the hydrogen tank 26 is charged into the fuel cell vehicle 70 through the fuel supply path 66 under the opening action of the valve 68 as necessary.

  Next, when the first adsorption tower 50a reaches the limit adsorption amount, the electrolysis process of pure water by the water electrolysis device 14 is temporarily stopped, and the adsorption device regeneration method according to the first embodiment of the present invention is performed. .

  In the first embodiment, first, in the inter-adsorption portion gas moving mechanism 54, the valve 56a is closed, while the valves 56b and 56c are opened. Here, the inside of the first adsorption tower 50a is pressurized to, for example, 35 MPa by high-pressure hydrogen gas, and the inside of the second adsorption tower 50b is maintained at atmospheric pressure. Accordingly, when the valves 56b and 56c are opened, the hydrogen gas (high-pressure gas) in the first adsorption tower 50a moves into the second adsorption tower 50b through the hydrogen branch paths 20a and 20b (see FIG. 3). ).

  Then, the hydrogen gas in the first adsorption tower 50a is moved to the second adsorption tower 50b by a predetermined amount, for example, half the amount, and the pressure in the first adsorption tower 50a and the pressure in the second adsorption tower 50b are moved. Are equalized, the valves 56b and 56c are closed. Therefore, each of the first adsorption tower 50a and the second adsorption tower 50b is filled with about 17 MPa of hydrogen gas. As a result, the pressure in the first adsorption tower 50a is reduced, while the pressure in the second adsorption tower 50b is increased.

  Next, under the switching action of the three-way switching valve 60a constituting the fuel supply mechanism 64a, the outlet side of the first adsorption tower 50a communicates with the fuel supply path 62a via the dry hydrogen branch path 24a. Therefore, the hydrogen gas remaining in the first adsorption tower 50a is gradually discharged from the first adsorption tower 50a to the dry hydrogen branch path 24a, and is supplied as fuel from the fuel supply path 62a to the first catalytic combustion section 52a. (See FIG. 4).

  Accordingly, the temperature of the first adsorption tower 50a rises under the combustion action of the first catalytic combustion section 52a, and the inside of the first adsorption tower 50a is depressurized by the discharge of the internal hydrogen gas. For this reason, the water | moisture content adsorb | sucked in the 1st adsorption tower 50a is remove | eliminated, and the waste_water | drain amount from the said 1st adsorption tower 50a increases gradually.

  When the pressure in the first adsorption tower 50a is reduced to atmospheric pressure, as shown in FIG. 5, the valves 56b and 56c are opened, so that the hydrogen gas in the second adsorption tower 50b becomes hydrogen branch paths 20b and 20a. And is supplied as purge gas into the first adsorption tower 50a. Purge gas (wet hydrogen) containing moisture by purging the inside of the first adsorption tower 50a is further supplied as fuel to the first catalytic combustion section 52a via the fuel supply mechanism 64a, and heating of the first adsorption tower 50a is performed. Done.

  As described above, after the regeneration process of the first adsorption tower 50a is completed, the first adsorption tower 50a is cooled, and dry hydrogen generation and supply operations are performed using the second adsorption tower 50b.

  In this case, in the first embodiment, after the high-pressure hydrogen gas in the first adsorption tower 50a is first moved to the second adsorption tower 50b by a predetermined amount, for example, half, the regeneration of the first adsorption tower 50a is performed. Processing has started. For this reason, for example, hydrogen gas remaining in the first adsorption tower 50a is increased as compared with the case where 35 MPa hydrogen gas filled in the first adsorption tower 50a is discharged for regeneration. Therefore, it is possible to effectively reduce the energy loss of the hydrogen discharged from the first adsorption tower 50a.

  Moreover, hydrogen gas is supplied from the first adsorption tower 50a to the second adsorption tower 50b, and the pressure in the second adsorption tower 50b is increased. As a result, the time taken to increase the pressure of the second adsorption tower 50b to a desired pressure, for example, 35 MPa, is shortened all at once, and dry hydrogen can be sent out quickly.

  Further, the inside of the first adsorption tower 50a is purged using the hydrogen gas moved from the first adsorption tower 50a into the second adsorption tower 50b. Therefore, it is not necessary to supply new hydrogen gas as the purge gas to the first adsorption tower 50a, and consumption of hydrogen gas can be effectively reduced. Thereby, there exists an advantage that the whole hydrogen production | generation process can be performed efficiently and economically.

  Furthermore, in the first embodiment, during the regeneration process of the first adsorption tower 50a, the hydrogen gas discharged from the first adsorption tower 50a is supplied as fuel to the first catalytic combustion section 52a via the fuel supply mechanism 64a. Have been supplied. For this reason, there is an effect that the equipment necessary for the heat regeneration process of the first adsorption tower 50a is reduced to the minimum, and the energy consumed for the heat regeneration process is effectively reduced, which is economical.

  Note that the regeneration process of the second adsorption tower 50b is the same as the regeneration process of the first adsorption tower 50a, and a description thereof will be omitted.

  Next, an adsorption apparatus regeneration method according to the second embodiment of the present invention will be described using the hydrogen generation system 10. In addition, the detailed description is abbreviate | omitted about the process similar to the adsorption | suction apparatus reproduction | regenerating method concerning 1st Embodiment. Similarly, in the third embodiment described below, detailed description thereof is omitted.

  In the second embodiment, when the first adsorption tower 50a is regenerated, first, the high-pressure hydrogen gas in the first adsorption tower 50a is supplied by a predetermined amount (for example, half the amount) through the inter-adsorption portion gas transfer mechanism 54. ) Is moved into the second adsorption tower 50b. After a predetermined amount of hydrogen gas moves from the first adsorption tower 50a to the second adsorption tower 50b, the valves 56b and 56c are closed, while the first catalytic combustion section 52a starts to combust and the first adsorption tower 50a. Is heated.

  At that time, the hydrogen gas remaining in the first adsorption tower 50a is sent to the outside or the gas-liquid separator 18 via the three-way switching valve 60a. For this reason, the inside of the 1st adsorption tower 50a is pressure-reduced, the water | moisture content adsorb | sucked by the water | moisture-content adsorption agent which is not shown in figure is detach | leaved, and is discharged | emitted from the said 1st adsorption tower 50a. And the 1st adsorption tower 50a will be in the state where the inside was filled with hydrogen of atmospheric pressure. In addition, you may supply the hydrogen gas discharged | emitted from the 1st adsorption tower 50a to the 1st catalyst combustion part 52a as a fuel similarly to 1st Embodiment.

  The second adsorption tower 50b is maintained at about 17 MPa by the hydrogen gas moved from the first adsorption tower 50a as described above. Therefore, the high-pressure hydrogen derived from the water electrolysis device 14 is supplied to the second adsorption tower 50 b through the gas-liquid separator 18. Therefore, in the second adsorption tower 50b, it is possible to quickly increase the pressure to a desired pressure (for example, 35 MPa), and to obtain an effect that dry hydrogen can be efficiently supplied from the second adsorption tower 50b.

  In the first adsorption tower 50a, for example, dry hydrogen in the hydrogen tank 26 can be supplied to the first adsorption tower 50a as a purge gas.

  Next, an adsorption apparatus regeneration method according to the third embodiment of the present invention will be described using the hydrogen generation system 10.

  In the third embodiment, when the first adsorption tower 50a is regenerated, first, the high-pressure hydrogen gas in the first adsorption tower 50a is moved to the second adsorption tower 50b by a predetermined amount. Then, under the combustion action of the first catalytic combustion section 52a, the first adsorption tower 50a is heated and the remaining hydrogen gas in the first adsorption tower 50a is discharged. In that case, you may supply the hydrogen discharged | emitted from this 1st adsorption tower 50a to the 1st catalyst combustion part 52a as a fuel.

  When the first adsorption tower 50a reaches atmospheric pressure, as shown in FIG. 6, the valves 58a and 58b are opened, and under the switching action of the three-way switching valve 60a, the hydrogen gas in the second adsorption tower 50b is converted into fuel. Is supplied to the first catalyst combustion section 52a. Thereby, the fuel supplied to the 1st catalyst combustion part 52a can be reduced effectively, and the effect that it is economical is acquired.

  FIG. 7 is an explanatory diagram of a schematic configuration of a hydrogen generation system 80 to which the adsorption apparatus regeneration method according to the fourth embodiment of the present invention is applied. The same components as those of the hydrogen generation system 10 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The hydrogen generation system 80 includes an adsorption device 82, and the adsorption device 82 includes a first adsorption tower 50a, a second adsorption tower 50b, and an auxiliary tank 84. The adsorption device 82 includes a three-way switching valve 86 for selectively communicating the hydrogen supply path 20 with the hydrogen branch path 20a and the hydrogen branch path 20b, and in parallel with the three-way switch valve 86, valves 56b and 56c are provided. The upper auxiliary tank channels 88 a and 88 b are disposed above the auxiliary tank 84.

  Lower auxiliary tank channels 90a and 90b are provided below the auxiliary tank 84, and the lower auxiliary tank channels 90a and 90b are connected to the dry hydrogen branch channels 24a and 24b via valves 58a and 58b. . A three-way switching valve 92 is disposed at the joining position of the dry hydrogen branch paths 24 a and 24 b and the dry hydrogen supply path 24. Lower auxiliary tank channels 90a and 90b, valves 58a and 58b, dry hydrogen branch channels 24a and 24b, three-way switching valves 60a and 60b, and fuel supply channels 62a and 62b constitute fuel supply mechanisms 94a and 94b.

  The operation of the hydrogen generation system 80 configured as described above will be described below in relation to the adsorption device regeneration method according to the fourth embodiment of the present invention.

  In the fourth embodiment, when the first adsorption tower 50a is regenerated, first, the three-way switching valves 86 and 92 are switched to connect the hydrogen supply path 20 and the dry hydrogen supply path 24 to the second adsorption tower 50b. . For this reason, the hydrogen production work by the first adsorption tower 50a is stopped, while the hydrogen production work by the second adsorption tower 50b is started.

  Next, the valves 56b, 56c and 58b are closed and the valve 58a is opened. Accordingly, the hydrogen gas (high pressure gas) in the first adsorption tower 50a moves into the auxiliary tank 84 through the dry hydrogen branch path 24a and the lower auxiliary tank flow path 90a (see FIG. 7).

  Then, the hydrogen gas in the first adsorption tower 50a is moved to the auxiliary tank 84 by a predetermined amount, for example, half, so that the pressure in the first adsorption tower 50a and the pressure in the auxiliary tank 84 are equalized. Then, the valve 58a is closed.

  Next, under the switching action of the three-way switching valve 60a constituting the fuel supply mechanism 94a, the outlet side of the first adsorption tower 50a communicates with the fuel supply path 62a via the dry hydrogen branch path 24a. For this reason, the hydrogen gas remaining in the first adsorption tower 50a is supplied from the first adsorption tower 50a through the fuel supply path 62a to the first catalytic combustion section 52a as fuel (see FIG. 8).

  When the pressure in the first adsorption tower 50a is reduced to atmospheric pressure, the valve 56b is opened while the valves 56c, 58a and 58b are closed as shown in FIG. Thereby, the hydrogen gas in the auxiliary tank 84 is supplied as purge gas into the first adsorption tower 50a through the upper auxiliary tank channel 88a and the hydrogen branch channel 20a. A purge gas (wet hydrogen) containing water by purging the inside of the first adsorption tower 50a is further supplied as fuel to the first catalytic combustion section 52a via the fuel supply mechanism 94a, and heating of the first adsorption tower 50a is performed. Done.

  As described above, in the fourth embodiment, when the first adsorption tower 50a is regenerated, first, the high-pressure gas in the first adsorption tower 50a is moved to the auxiliary tank 84 by a predetermined amount, and the first adsorption tower 50a is moved. While the regeneration process of 50a is performed, the hydrogen production process by the second adsorption tower 50b is performed. Therefore, in the adsorption device 82, the hydrogen production process by the second adsorption tower 50b is performed during the regeneration process of the first adsorption tower 50a, and the hydrogen production process by the first adsorption tower 50a during the regeneration process of the second adsorption tower 50b. Is done. Thereby, the continuous operation of the hydrogen production process by the adsorption device 82 becomes possible, and an effect of being efficient can be obtained.

  The adsorption devices 22 and 82 include the first adsorption tower 50a and the second adsorption tower 50b. However, the present invention is not limited to this. For example, three or more adsorption towers may be configured in parallel. Good.

It is schematic structure explanatory drawing of the hydrogen generation system to which the adsorption | suction apparatus reproduction | regeneration method which concerns on the 1st-3rd embodiment of this invention is applied. It is operation | movement explanatory drawing of the said hydrogen generation system. It is operation | movement explanatory drawing of the adsorption | suction apparatus which comprises the said hydrogen generation system. It is operation | movement explanatory drawing of the said adsorption | suction apparatus. It is operation | movement explanatory drawing of the said adsorption | suction apparatus. It is operation | movement explanatory drawing of the said adsorption | suction apparatus. It is schematic structure explanatory drawing of the hydrogen generation system to which the adsorption | suction apparatus reproduction | regeneration method concerning the 4th Embodiment of this invention is applied. It is operation | movement explanatory drawing of the adsorption | suction apparatus which comprises the said hydrogen generation system. It is operation | movement explanatory drawing of the said adsorption | suction apparatus. It is explanatory drawing of the apparatus currently disclosed by patent document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 80 ... Hydrogen production system 12 ... Pure water supply apparatus 14 ... Water electrolysis apparatus 16 ... Hydrogen lead-out path 18 ... Gas-liquid separator 20 ... Hydrogen supply path 22, 82 ... Adsorption apparatus 24 ... Dry hydrogen supply path 50a, 50b ... Adsorption towers 52a, 52b ... catalytic combustion part 54 ... inter-adsorption part gas transfer mechanism 32, 56a-56c, 58a-58c, 68 ... valves 60a, 60b, 86, 92 ... three-way switching valves 64a, 64b, 94a, 94b ... fuel Supply mechanism 70 ... Fuel cell vehicle 88a, 88b ... Upper auxiliary tank channel 90a, 90b ... Lower auxiliary tank channel

Claims (6)

A water electrolysis unit that electrolyzes water to generate high-pressure hydrogen, a gas-liquid separation unit that removes moisture from the generated high-pressure hydrogen, and water contained in the high-pressure hydrogen derived from the gas-liquid separation unit A hydrogen generation system comprising an adsorption device for adsorption and removal,
The adsorption device includes at least a first adsorption unit and a second adsorption unit that are selectively connected to the gas-liquid separation unit;
A first combustion section and a second combustion section for heating to regenerate the first adsorption section and the second adsorption section;
Between the adsorbing units that move a part of the high-pressure gas in the first adsorbing unit into the second adsorbing unit or a part of the high-pressure gas in the second adsorbing unit into the first adsorbing unit during regeneration of the adsorbing device A gas transfer mechanism;
A fuel supply mechanism capable of supplying the gas in the first adsorption unit and the second adsorption unit as fuel to the first combustion unit and the second combustion unit;
A hydrogen generation system comprising: A water electrolysis unit that electrolyzes water to generate high-pressure hydrogen, a gas-liquid separation unit that removes moisture from the generated high-pressure hydrogen, and water contained in the high-pressure hydrogen derived from the gas-liquid separation unit A hydrogen generation system comprising an adsorption device for adsorption and removal,
The adsorption device includes at least a first adsorption unit and a second adsorption unit that are selectively connected to the gas-liquid separation unit;
A first combustion section and a second combustion section for heating to regenerate the first adsorption section and the second adsorption section;
An auxiliary tank into which a part of the high-pressure gas in the first adsorption part or a part of the high-pressure gas in the second adsorption part flows during the regeneration of the adsorption device;
A fuel supply mechanism capable of supplying the gas in the auxiliary tank as fuel to the first combustion unit and the second combustion unit;
A hydrogen generation system comprising: A water electrolysis unit that electrolyzes water to generate high-pressure hydrogen, a gas-liquid separation unit that removes moisture from the generated high-pressure hydrogen, and water contained in the high-pressure hydrogen derived from the gas-liquid separation unit An adsorbing device that adsorbs and removes the adsorbing device, wherein the adsorbing device is selectively connected to the gas-liquid separation unit, at least a first adsorbing unit and a second adsorbing unit, and the first adsorbing unit and the second adsorbing unit. An adsorption device regeneration method for a hydrogen generation system comprising a first combustion section and a second combustion section that are heated to regenerate an adsorption section,
A step of moving the high-pressure gas in the first adsorption unit by a predetermined amount to the second adsorption unit when regenerating the first adsorption unit;
Supplying the remaining gas in the first adsorption section as fuel to the first combustion section;
Supplying the gas in the second adsorption unit into the first adsorption unit;
An adsorber regeneration method for a hydrogen generation system, comprising: A water electrolysis unit that electrolyzes water to generate high-pressure hydrogen, a gas-liquid separation unit that removes moisture from the generated high-pressure hydrogen, and water contained in the high-pressure hydrogen derived from the gas-liquid separation unit An adsorbing device that adsorbs and removes the adsorbing device, wherein the adsorbing device is selectively connected to the gas-liquid separation unit, at least a first adsorbing unit and a second adsorbing unit, and the first adsorbing unit and the second adsorbing unit. An adsorption device regeneration method for a hydrogen generation system comprising a first combustion section and a second combustion section that are heated to regenerate an adsorption section,
A step of moving the high-pressure gas in the first adsorption unit by a predetermined amount to the second adsorption unit when regenerating the first adsorption unit;
Heating the first adsorption part via the first combustion part and discharging the remaining gas in the first adsorption part;
A method for regenerating an adsorption device for a hydrogen generation system, comprising: A water electrolysis unit that electrolyzes water to generate high-pressure hydrogen, a gas-liquid separation unit that removes moisture from the generated high-pressure hydrogen, and water contained in the high-pressure hydrogen derived from the gas-liquid separation unit An adsorbing device that adsorbs and removes the adsorbing device, wherein the adsorbing device is selectively connected to the gas-liquid separation unit, at least a first adsorbing unit and a second adsorbing unit, and the first adsorbing unit and the second adsorbing unit. An adsorption device regeneration method for a hydrogen generation system comprising a first combustion section and a second combustion section that are heated to regenerate an adsorption section,
A step of moving the high-pressure gas in the first adsorption unit by a predetermined amount to the second adsorption unit when regenerating the first adsorption unit;
Heating the first adsorption part via the first combustion part and discharging the remaining gas in the first adsorption part;
Supplying the gas in the second adsorbing section as fuel to the first combustion section;
A method for regenerating an adsorption device for a hydrogen generation system, comprising: A water electrolysis unit that electrolyzes water to generate high-pressure hydrogen, a gas-liquid separation unit that removes moisture from the generated high-pressure hydrogen, and water contained in the high-pressure hydrogen derived from the gas-liquid separation unit An adsorbing device that adsorbs and removes the adsorbing device, wherein the adsorbing device is selectively connected to the gas-liquid separation unit, at least a first adsorbing unit and a second adsorbing unit, and the first adsorbing unit and the second adsorbing unit. An adsorption device regeneration method for a hydrogen generation system comprising a first combustion section and a second combustion section that are heated to regenerate an adsorption section,
A step of moving the high-pressure gas in the first adsorbing unit by a predetermined amount to the auxiliary tank when regenerating the first adsorbing unit;
Supplying the remaining gas in the first adsorption section as fuel to the first combustion section;
Supplying the gas in the auxiliary tank into the first adsorption unit;
A method for regenerating an adsorption device for a hydrogen generation system, comprising:

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