JP2020007173A - Power generation system using hydrogen and hydrogen generator - Google Patents

Abstract

To provide a hydrogen generator capable of easily controlling the generation amount of hydrogen and efficiently generating hydrogen, and to provide a power generation system using hydrogen generated by the hydrogen generator.SOLUTION: A power generation system (1) using hydrogen according to the present invention comprises a power generator, and a hydrogen generator (2) for generating hydrogen to be supplied to the power generator. The hydrogen generator (2) comprises: an aqueous solution storage part (10) for storing an aqueous solution (11); a raw material storage part (20) for storing a raw material (21) containing magnesium in a state capable of generating hydrogen by reaction with the aqueous solution (11); and a raw material supply mechanism (30) for supplying the raw material (21) from the raw material storage part (20) toward the aqueous solution storage part (10).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power generation system using hydrogen and a hydrogen generator.

  Patent Literature 1 addresses the problem that if the amount of hydrogen generated per unit time is not stable, and if the generated hydrogen is supplied to a fuel cell to generate power, the output of power becomes unstable, A hydrogen generating apparatus that includes a reaction vessel in which a hydrolysis reaction of magnesium is performed and supplies hydrogen or an acidic solution to the reaction vessel to generate hydrogen, wherein a height for loading magnesium hydride is provided at the bottom of the reaction vessel. A plurality of cylinders different from each other, and further comprising a dropping part for dropping water or an acidic solution onto the magnesium hydride loaded in the cylinder from above the highest cylinder. A hydrogen generator is disclosed.

  Then, in Patent Document 1, since water or an acidic solution is dropped into a high cylinder, a hydrolysis reaction is started from magnesium hydride charged in the highest cylinder to generate hydrogen and generate water or water. When the acidic solution continues to be dropped, water or the acidic solution overflows from the highest cylinder, and water or the acidic solution is supplied to the next highest cylinder to generate hydrogen. It is described that it becomes possible to stably generate hydrogen while suppressing fluctuations in the generation amount.

JP 2013-133232 A

  By the way, for example, when water is dropped into magnesium hydride and hydrogen is generated by a hydrolysis reaction, magnesium hydroxide is generated as a by-product.

  Therefore, when water is dropped on the cylindrical portion loaded with magnesium hydride, a layer of magnesium hydroxide generated by the dropping of water is formed on the surface of the filled magnesium hydride.

  Then, at the time of the subsequent dropping of water, the hydrolysis reaction of magnesium hydride may be inhibited, and hydrogen may not be generated efficiently.

  The present invention has been made in view of such circumstances, and it is easy to control the amount of generated hydrogen, and a hydrogen generator capable of efficiently generating hydrogen, and hydrogen generated by the hydrogen generator. It is an object of the present invention to provide a power generation system using the same.

The present invention is grasped by the following configurations in order to achieve the above object.
(1) A power generation system according to the present invention is a power generation system using hydrogen, the power generation system including: a power generation device; and a hydrogen generation device that generates the hydrogen supplied to the power generation device. The generator is an aqueous solution storage unit that stores an aqueous solution, a raw material storage unit that stores a raw material containing magnesium in a state in which the hydrogen can be generated by a reaction with the aqueous solution, and from the raw material storage unit to the aqueous solution storage unit. A raw material supply mechanism for supplying the raw material to the raw material.

(2) In the configuration of the above (1), the aqueous solution storage unit includes an upper space above the aqueous solution, in which the aqueous solution does not exist, and the raw material supply mechanism moves the aqueous solution from the upper space side toward the aqueous solution. It is provided so as to supply a raw material, the hydrogen generator is a pressure measuring device that measures the pressure in the upper space, and based on the pressure measurement result of the pressure measuring device, drives the raw material supply mechanism And a control unit for controlling a supply amount of the raw material supplied toward the aqueous solution.

(3) In the configuration of (2), the aqueous solution storage unit includes a lower space below the upper space where the aqueous solution exists, a partition unit that vertically partitions the lower space, and a partition unit. A drain port provided on the lower side for draining the aqueous solution, and a water supply port provided above the partition section to supply the aqueous solution are provided, and the partition section is configured to react with the raw material and the aqueous solution. A plurality of through-holes are provided so that generated by-products can settle below the partition.

(4) In the configuration of (3), the hydrogen generator includes a drainage control valve that controls drainage of the aqueous solution from the drainage port, and a water supply control valve that controls water supply of the aqueous solution from the water supply port. The control unit controls the drainage control valve and the water supply control valve based on a supply amount of the raw material supplied toward the aqueous solution.

(5) In any one of the constitutions (1) to (4), the power generation system is provided between the aqueous solution storage section and the power generation device, and the hydrogen is generated in the aqueous solution storage section. A buffer mechanism capable of storing the hydrogen.

(6) In the configuration of the above (5), the power generation system includes a purification mechanism provided between the aqueous solution storage unit and the power generation device and the buffer mechanism, and the purification mechanism includes: A first purifying section having a first dehydrating section and a first impurity gas removing section; and a second purifying section having a second dehydrating section and a second impurity gas removing section, and passing through the first purifying section. When the hydrogen is supplied to the power generation device or the buffer mechanism, the second dehydration unit of the second purification unit can be dried, and the hydrogen is passed through the second purification unit and the hydrogen is supplied to the power generation device or the buffer unit. The first dehydrating section of the first purifying section can be dried when supplying to the buffer mechanism.

(7) In any one of the constitutions (1) to (4), the power generation system includes a purification mechanism provided between the aqueous solution storage unit and the power generation device, wherein the hydrogen is provided. The purifying mechanism includes: a first purifying unit having a first dehydrating unit and a first impurity gas removing unit; and a second purifying unit having a second dehydrating unit and a second impurity gas removing unit. When the hydrogen is supplied to the power generating device by passing through the second purifying unit, the second dehydrating unit of the second purifying unit can be dried, and the hydrogen is supplied to the power generating device through the second purifying unit. Then, the first dehydration section of the first purification section can be dried.

(8) The hydrogen generator of the present invention includes an aqueous solution storage unit that stores an aqueous solution, a raw material storage unit that stores a raw material containing magnesium in a state where hydrogen can be generated by a reaction with the aqueous solution, and the raw material storage unit. And a raw material supply mechanism for supplying the raw material to the aqueous solution storage unit from the above.

(9) In the configuration of the above (8), the aqueous solution storage unit includes an upper space above the aqueous solution where the aqueous solution does not exist, and the raw material supply mechanism is configured to move the aqueous solution from the upper space side toward the aqueous solution. It is provided so as to supply a raw material, the hydrogen generator is a pressure measuring device that measures the pressure in the upper space, and based on the pressure measurement result of the pressure measuring device, drives the raw material supply mechanism And a control unit for controlling a supply amount of the raw material supplied toward the aqueous solution.

(10) In the configuration of the above (9), the aqueous solution storage section includes a lower space in which the aqueous solution is located below the upper space, a partition section for vertically partitioning the lower space, and a partition section. A drain port provided on the lower side for draining the aqueous solution, and a water supply port provided above the partition section to supply the aqueous solution are provided, and the partition section is configured to react with the raw material and the aqueous solution. A plurality of through-holes are provided so that generated by-products can settle below the partition.

(11) In the configuration of the above (10), the hydrogen generator includes a drainage control valve for controlling a drainage amount of the aqueous solution drained from the drainage port, and controls a water supply amount of the aqueous solution supplied from the water supply port. A water supply control valve for controlling the drainage control valve and the water supply control valve based on a supply amount of the raw material supplied toward the aqueous solution.

  According to the present invention, it is possible to provide a hydrogen generator capable of easily controlling the amount of generated hydrogen and efficiently generating hydrogen, and a power generation system using hydrogen generated by the hydrogen generator. .

It is a sectional view for explaining the power generation system of a 1st embodiment concerning the present invention. It is a sectional view for explaining the power generation system of the second embodiment according to the present invention.

Hereinafter, embodiments for implementing the present invention (hereinafter, embodiments) will be described in detail with reference to the accompanying drawings.
Note that the same elements are denoted by the same reference numerals throughout the description of the embodiments.

(1st Embodiment)
FIG. 1 is a cross-sectional view illustrating a power generation system 1 according to a first embodiment of the present invention.
In the following, the hydrogen generator 2 according to the first embodiment of the present invention will be described while describing the power generation system 1.

  As shown in FIG. 1, the power generation system 1 includes a power generation device (not shown) and a hydrogen generation device 2 that generates hydrogen to be supplied to the power generation device, which will be described in detail hereinafter.

The power generation device (not shown) is, for example, a general turbine generator that drives a turbine using hydrogen as a fuel in the present embodiment.
However, as in another embodiment described later, the power generation device (not shown) may be a fuel cell.

  The hydrogen generator 2 includes an aqueous solution storage unit 10 that stores an aqueous solution 11, a raw material storage unit 20 that stores a raw material 21 containing magnesium in a state where hydrogen can be generated by a reaction with the aqueous solution 11, and a raw material storage unit 20. A raw material supply mechanism 30 that supplies the raw material 21 to the aqueous solution storage unit 10.

The aqueous solution 11 may be water, an alkaline aqueous solution containing ammonia or the like, or an acidic aqueous solution such as hydrochloric acid or nitric acid.
In terms of running cost when operating the power generation system 1, it is advantageous that the aqueous solution 11 is water. On the other hand, in terms of reactivity with the raw material 21, the aqueous solution 11 is an alkaline aqueous solution containing ammonium ions. Alternatively, an acidic aqueous solution such as hydrochloric acid is more advantageous.

  The raw material 21 is preferably in the form of particles having a small average particle diameter (in the state of microparticles or nanoparticles) in order to enhance the reactivity with the aqueous solution 11. For example, hydrogen can be generated by the reaction with the aqueous solution 11. Examples of magnesium in a state include metallic magnesium and magnesium hydride.

  However, it does not limit that the shape is spherical even if it is referred to as particles, and when the average outer diameter when averaging the maximum outer diameter of each particle is on the order of micrometer, it is a microparticle, and it is more than the micrometer order. If they are also small (including submicron), they should be interpreted as nanoparticles.

The raw material 21 may be a mixture of metallic magnesium and magnesium hydride.
In addition, the raw material 21 may include a material used for producing metallic magnesium or magnesium hydride, which is partially left as it is instead of being metallic magnesium or magnesium hydride.

  The aqueous solution storage unit 10 also functions as a reaction chamber in which the raw material 21 and the aqueous solution 11 react, and constitutes a container having a closed structure in which the aqueous solution 11 and hydrogen generated by the reaction do not leak to the outside.

  The water supply of the aqueous solution 11 is performed so that the upper space US in which the aqueous solution 11 which is higher than the aqueous solution 11 does not exist is formed in the aqueous solution storage unit 10, so that the aqueous solution storage unit 10 is positioned above the aqueous solution 11. The upper space US in which the aqueous solution 11 does not exist is provided.

  More specifically, the configuration for forming the upper space US will be described. First, the aqueous solution storage unit 10 is provided to determine the upper limit position of the water surface LSF of the aqueous solution 11, and the upper level sensor 12 for detecting the water surface LSF, and the aqueous solution 11 And a lower level sensor 13 for detecting the water surface LSF.

  Further, the aqueous solution storage unit 10 is provided with a lower space LS in which an aqueous solution 11 below the upper space US is present, a partition unit 14 for vertically partitioning the lower space LS, and a lower portion of the aqueous solution solution provided below the partition unit 14. The partition 14 has a plurality of through holes 14 </ b> A through which the aqueous solution 11 can pass, while a drain port 15 for draining the aqueous solution 11 and a water supply port 16 provided above the partition 14 to supply the aqueous solution 11 are provided. ing.

  The hydrogen generator 2 is connected to a drain port 15 and is provided on a drain line 15A (also referred to as a drain pipe) for draining the aqueous solution 11 in the aqueous solution storage unit 10 and a drain line 15A near the drain port 15. A drain control valve 15B for controlling drainage of the aqueous solution 11 from the drain port 15 (whether or not there is drainage).

  Similarly, the hydrogen generator 2 is connected to the water supply port 16 and supplies a new water solution 11 into the aqueous solution storage unit 10 (also referred to as a water supply pipe), and a water supply line 16A near the water supply port 16. A water supply control valve 16 </ b> B that is provided above and controls water supply (whether or not water is supplied) of the aqueous solution 11 from the water supply port 16.

  For this reason, at a predetermined timing for drainage and supply of water, which will be described later, a control unit (hereinafter simply referred to as a control unit) of the hydrogen generator 2 (not shown) first opens the drainage control valve 15B to open the aqueous solution storage unit 10. After draining the aqueous solution 11 in the inside, the drainage control valve 15B is closed, and the water supply control valve 16B is opened to position the water surface LSF of the aqueous solution 11 between the upper level sensor 12 and the lower level sensor 13. Then, the aqueous solution 11 is supplied into the aqueous solution storage unit 10, and the water supply control valve 16B is closed again.

  For example, at the time of drainage, the aqueous solution 11 is drained to such an extent that the water surface LSF of the aqueous solution 11 drops to the partition portion 14 based on the fact that the lower level sensor 13 detects the water surface LSF of the aqueous solution 11.

  Specifically, since the drainage amount per unit time when the drainage control valve 15B is opened can be checked in advance, the start point is that the lower level sensor 13 detects the water level LSF of the aqueous solution 11. The drainage control valve 15B may be closed when the time required for drainage of the aqueous solution 11 with the amount of drainage necessary for lowering the water level LSF of the aqueous solution 11 to the partition portion 14 has elapsed.

  Then, after the drainage of the aqueous solution 11 is completed, the water supply of the aqueous solution 11 is started, and the water level LSF of the aqueous solution 11 is changed to the upper level sensor 12 based on the detection of the water level LSF of the aqueous solution 11 by the lower level sensor 13. When the water supply of the aqueous solution 11 is performed so as to be located between the upper level sensor 12 and the lower level sensor 13, the water level is stopped between the upper level sensor 12 and the lower level sensor 13. By doing so, the aqueous solution storage unit 10 has an upper space US above the aqueous solution 11 where the aqueous solution 11 does not exist.

  Specifically, since the water supply amount per unit time when the water supply control valve 16B is opened can be checked in advance, it is determined that the lower level sensor 13 has detected the water level LSF of the aqueous solution 11 at the start point. The water supply control valve 16B is closed when the time required for supplying the aqueous solution 11 of the water supply amount necessary for the water level LSF of the aqueous solution 11 to be located between the upper level sensor 12 and the lower level sensor 13 has elapsed. do it.

  When the upper level sensor 12 detects the water level LSF of the aqueous solution 11 at a time other than the predetermined timing for draining and supplying water, a control unit (not shown) opens the drainage control valve 15B to raise the water level LSF of the aqueous solution 11 to the upper level. After draining the aqueous solution 11 to such an extent that it is located between the sensor 12 and the lower level sensor 13, the drain control valve 15B is closed.

  Conversely, when the lower level sensor 13 detects the water level LSF of the aqueous solution 11 at a time other than the predetermined timing of drainage, the control unit (not shown) opens the water supply control valve 16B, and the water level LSF of the aqueous solution 11 becomes lower. After supplying the aqueous solution 11 to such an extent that it is located between the upper level sensor 12 and the lower level sensor 13, the water supply control valve 16B is closed.

  The inner diameter of the plurality of through-holes 14A of the partition 14 is set to a size that does not prevent the passage of by-products such as magnesium hydroxide generated by the reaction between the raw material 21 and the aqueous solution 11.

  That is, the partition 14 has a plurality of through-holes 14 </ b> A provided so that by-products generated by the reaction between the raw material 21 and the aqueous solution 11 can settle below the partition 14.

  For this reason, the aqueous solution 11 having a high concentration of by-products is drained from the drain port 15 provided below the partition part 14.

  The inner diameter of the plurality of through-holes 14A of the partition 14 is such that when the raw material 21 precipitates below the partition 14 and hydrogen is generated below the partition 14, bubbles due to the hydrogen are generated. The size is such that it can pass above the partition 14 without disturbing, or even if hydrogen accumulates temporarily on the lower surface of the partition 14, it naturally moves to the upper side of the partition 14. Has also become.

  On the other hand, as shown in FIG. 1, the hydrogen generator 2 includes a stirring mechanism 40 that stirs the aqueous solution 11 above the partition 14.

Specifically, the stirring mechanism 40 includes a motor 41 provided outside the upper wall of the aqueous solution storage unit 10, and a propeller 42 disposed in the aqueous solution 11 above the partition unit 14 and agitating the aqueous solution 11. And a shaft 43 for transmitting the rotational force of the motor 41 to the propeller 42 and rotating the propeller 42 so as to agitate the aqueous solution 11.
The insertion section into which the shaft 43 is inserted into the aqueous solution storage section 10 has a confidential structure that does not hinder rotation and can maintain confidentiality.

  The stirring mechanism 40 is provided to prevent the raw material 21 that has not reacted with the aqueous solution 11 from accumulating on the partitioning portion 14. According to the configuration of the present invention, as described later, It is not always necessary because the reaction efficiency between the raw material 21 and the aqueous solution 11 is high.

The control unit (not shown) drives the stirring mechanism 40 periodically to promote the reaction between the raw material 21 and the aqueous solution 11.
The stirring mechanism 40 may be driven at all times, but by driving the stirring mechanism at regular intervals, by-products can be easily precipitated below the partition 14, and the stirring mechanism 40 may be driven above the partition 14. The concentration of by-products in the aqueous solution 11 can be reduced, and the reaction efficiency between the raw material 21 and the aqueous solution 11 can be increased.

  In addition, by providing the partition part 14, when the stirring mechanism 40 is driven, by-products precipitated below the partition part 14 are wound up, and the aqueous solution 11 above the partition part 14 Since it is possible to suppress an increase in the concentration of the by-product, the drive of the stirring mechanism 40 can suppress a decrease in the reaction efficiency of the raw material 21 and the aqueous solution 11.

  On the other hand, the hydrogen generator 2 has an emergency exhaust line 50 (also referred to as an emergency exhaust pipe) connected to the aqueous solution storage unit 10 so as to communicate with the upper space US, and a communication that communicates with the upper space US of the emergency exhaust line 50. A solenoid valve 51 provided at a position close to the head and controlling the presence or absence of emergency exhaust, and connected to an emergency exhaust line 50 from the solenoid valve 51 to the aqueous solution storage unit 10 to measure the pressure in the upper space US And a pressure measuring device 52 (for example, a digital Manostar gauge).

Therefore, when the pressure measurement result of the pressure measuring device 52 that measures the pressure in the upper space US indicates an abnormally high pressure, the control unit (not shown) opens the solenoid valve 51 to open the upper space US. Pressure control is performed so that the internal pressure becomes a predetermined first pressure (a required primary pressure).
When the predetermined first pressure (the required primary pressure) is reached, the control unit (not shown) closes the solenoid valve 51 again.

  The raw material storage unit 20 has a work door 22 that is opened and closed at the time of filling work of the raw material 21 on the upper side. When the work door 22 is closed, a container having a closed structure is configured.

  In addition, the raw material storage unit 20 includes a distance measuring device 24 (for example, a displacement sensor) that is provided on the upper side adjacent to the work door 22 and measures a distance to the surface of the stored raw material 21. By increasing the distance to the raw material 21 measured by the distance measuring device 24, it is possible to know when to add the raw material 21.

  Although the surface of the raw material 21 is not necessarily almost flat like the aqueous solution 11, the whole raw material 21 is vibrated by the driving of the raw material supply mechanism 30, which will be described later. Can be maintained, and the measurement result of the distance to the raw material 21 measured by the distance measuring device 24 can be used as one measure of the time when the raw material 21 is added.

  However, as will be described later, in the present embodiment, since the supply amount of the raw material 21 supplied to the aqueous solution 11 can be grasped, the supply amount of the raw material 21 supplied to the aqueous solution 11 is based on reaching a predetermined amount. The raw material 21 may be added, and in this case, the distance measuring device 24 becomes unnecessary.

  The raw material storage unit 20 is provided such that at least a part of the bottom wall portion is in close contact with the outside of the upper wall portion of the aqueous solution storage unit 10, and the bottom wall portion of the closely contacted portion is provided on the bottom wall portion. A raw material supply hole 23 for supplying the raw material 21 penetrating the bottom wall into the aqueous solution storage unit 10 is formed.

  The raw material receiving hole 17 for receiving the raw material 21 penetrating the upper wall portion is formed at a position corresponding to the raw material supply hole 23 of the raw material storage unit 20 also in the aqueous solution storage unit 10.

On the other hand, a raw material supply mechanism 30 is provided in the raw material storage unit 20.
Specifically, the raw material supply mechanism 30 includes a motor 31 installed inside the upper wall of the raw material storage unit 20 and a motor 31 installed adjacent to the inside of the bottom wall of the raw material storage unit 20. And a shaft 33 that transmits the rotational force of the motor 31 to the disk 32 and rotates the disk 32.

  Although not shown, the raw material storage unit 20 is configured such that a bottom part and a part above the bottom part are separable for the operation of incorporating the raw material supply mechanism 30, and are integrally formed. It has become.

  Then, as shown in the perspective view of the disk 32 surrounded by a dotted frame on the left side of FIG. 1, the disk 32 faces the rotation center O and is located at a position substantially the same distance from the rotation center O. , A pair of through holes (a through hole 32A and a through hole 32B) are formed.

  Here, as can be seen from FIG. 1, the raw material storage unit 20 includes a concave portion that is recessed in a lateral direction that receives a part of the disk 32, above a portion corresponding to the raw material supply hole 23. The inner surface of the concave portion is close to the opening above the through hole (see the through hole 32B) of the disc 32 located in the concave portion, so that the opening is almost closed.

  For this reason, even if the gas (mainly hydrogen) in the upper space US attempts to enter the raw material storage unit 20 side, when the opening of the through hole (see the through hole 32B) of the disk 32 is located above the raw material supply hole 23, Since the opening is almost closed, the gas (mainly, hydrogen) in the upper space US cannot enter the raw material storage unit 20 side.

  Then, when the through-holes (through-holes 32A and 32B) of the disc 32 are located at positions other than the laterally concave recesses that receive a part of the disc 32 (for example, see the position of the through-hole 32A). The raw material 21 enters into the through hole (see the through hole 32A), and the disc 32 rotates to receive a part of the disc 32, and the through hole (the through hole 32A, When the hole 32B) is positioned (see the position of the through hole 32B), the raw material 21 filled in the through hole (the through hole 32A and the through hole 32B) passes through the raw material supply hole 23 and the raw material receiving hole 17. Are supplied from the upper space US toward the aqueous solution 11.

  In the present embodiment, the hydrogen generator 2 includes a pressure measuring device 61 (for example, a digital manostar gauge) that measures the pressure in the upper space US1 where the raw material 21 above the raw material 21 in the raw material storage unit 20 does not exist. A gas supply line 62 (also referred to as a gas supply pipe) for supplying a gas (for example, a low-activity gas such as nitrogen with a low dew point or an inert gas such as helium or argon with a low dew point) to the upper space US1; And a solenoid valve 63 provided on the line 62 for controlling whether or not gas is supplied to the upper space US1.

  The control unit (not shown) adjusts the pressure in the upper space US1 to a predetermined pressure (for example, in the upper space US of the aqueous solution storage unit 10) based on the measurement result of the pressure measured by the pressure measuring device 61 in the upper space US1. The opening / closing control of the electromagnetic valve 63 is performed so that the pressure becomes approximately the same as the pressure).

  Although not shown, the hydrogen generator 2 includes a gas exhaust line (also referred to as a gas supply pipe) for exhausting gas in the upper space US1 and a gas exhaust line in the upper space US1 through the gas exhaust line. It also has a solenoid valve that controls the presence or absence of exhaust.

  Therefore, more precisely, the control unit (not shown) controls the electromagnetic valve 63 and the electromagnetic valve that controls the presence or absence of gas exhaust so that the pressure in the upper space US1 becomes a predetermined pressure (for example, aqueous solution storage). (The same pressure as the pressure in the upper space US of the section 10).

  Since the upper space US1 is pressurized, the gas (mainly, hydrogen) in the upper space US can be further prevented from entering the raw material storage unit 20 side, and a part of the disk 32 is received. When the through-holes (through-holes 32A and 32B) of the disc 32 are located at positions other than the recesses recessed in the lateral direction (for example, see the position of the through-hole 32A), the through-holes (through-holes 32A and The raw material 21 efficiently enters the holes 32B).

  In the present embodiment, when the through-holes (through-holes 32A and 32B) are located at the positions of the concave portions that are recessed in the lateral direction for receiving a part of the disc 32, the through-holes (through-holes 32A and The raw material 21 filled in the hole 32B) is supplied to the aqueous solution 11 by dropping from the upper space US side toward the aqueous solution 11 through the raw material supply hole 23 and the raw material receiving hole 17 by its own weight. .

  However, the hydrogen generator 2 inserts the rod into the through holes (through holes 32A and 32B) located immediately above the raw material supply holes 23 and the raw material receiving holes 17, and the through holes (through holes 32A, through holes 32A). A raw material extruding mechanism for forcibly extruding the raw material 21 in the hole 32B) may be provided, so that the raw material 21 can be reliably supplied to the aqueous solution 11.

  When such a raw material pushing mechanism is provided, the rotation of the disk 32 is stopped when the through holes (the through holes 32A and 32B) of the disk 32 are located immediately above the raw material supply holes 23 and the raw material receiving holes 17. Then, after inserting a rod into the through-hole (through-hole 32A, through-hole 32B) and supplying the raw material 21 toward the aqueous solution 11, the rod is removed from the through-hole (through-hole 32A, through-hole 32B). Then, the operation of rotating the disk 32 is repeated again.

  In the present embodiment, as described above, a pair of through-holes (through-hole 32A and through-hole 32A) are opposed to each other with the rotation center O of the disc 32 interposed therebetween and at substantially the same distance from the rotation center O. 32B) is formed, but it is not necessary to be limited to this.

  For example, three through holes of the same size are provided at substantially the same distance from the rotation center O at equal intervals in the rotation direction of the disk 32 (in this case, between adjacent through holes viewed in the circumferential direction of the disk 32). May be provided at an angle pitch of 120 °. In this case, four through-holes (in this case, the angular pitch between adjacent through-holes viewed in the circumferential direction of the disk 32) at equal intervals in the rotation direction may be provided. Is 90 ° pitch).

  Even if there is only one through-hole, the one through-hole is recessed in the lateral direction for receiving a part of the disk 32 and a position other than the concave part which is recessed in the horizontal direction for receiving a part of the disk 32. The raw material 21 can be supplied to the aqueous solution 11 by controlling so as to be alternately positioned between the concave portion and the concave portion, so that there is no problem.

  However, when the number of through holes increases, it becomes difficult to form a concave portion that is recessed in the lateral direction for receiving a part of the disk 32. Therefore, the number of through holes is preferably four or less.

Further, the size of the through-hole may be selected so that the raw material 21 can be supplied according to the amount of hydrogen to be generated.
For example, the mass of the magnesium hydride (weight per 1 mol) is 26.32G, the density of the magnesium hydride is about 2.36 g / cm ^3, a volume of about 11.2 cm ³ weak (about 1 mol) When the raw material 21 composed of magnesium hydride is charged into the aqueous solution 11, less than 45 liters (about 2 mol) of hydrogen is generated in a standard state.

Then, assuming that about 0.6 billion m ³ / year of hydrogen is used in a hydrogen gas turbine type power generation apparatus that generates about 10 MW of power, about 114 m ³ of hydrogen is required per minute. Taking a through hole as an example, the following is obtained.

For example, the thickness of the disc 32 is about 10 cm, the diameter of the disc 32 is about 70 cm, and the inner end of the through hole having a diameter of about 21 cm (center of the through hole) is located at about 10 cm offset from the rotation center O. (20.5 cm offset from the rotation center O), the volume of the through-hole is about 3346 cm ^{3 or} less.

For this reason, about 300 mol (= 3346 [cm ³ ] / 11.2 [cm ³ ]) of the raw material 21 can be filled in the through-hole of the dimension as described above, and this amount of magnesium hydride is used. Assuming that the raw material 21 is charged into the aqueous solution 11, about 600 mol (about 13.4 m ³ ) of hydrogen is generated.

Then, considering the case where two through holes are provided in the disc 32 like the through holes 32A and 32B of the present embodiment, the through holes are formed twice per rotation (the through hole 32A Since the raw material 21 is supplied to the aqueous solution 11 from the hole 32B once), when the disk 32 is rotated once in 12 seconds (5 rotations per minute), the disk 21 is directed to the aqueous solution 11 10 times per minute. As a result, the raw material 21 is supplied, and the raw material 21 that can generate enough hydrogen (about 134 m ³ ) more than 114 m ³ per minute can be supplied.

Therefore, when assuming a small-sized (about 10,000 KW) hydrogen gas turbine type power generator, if the disk 32 is provided with two through holes, the volume of the through holes may be less than about 3346 cm ^3. it is conceivable that.

However, if the power generation amount of the power generation device increases, the supply amount of the necessary raw material 21 increases. Therefore, assuming a power generation device having a power generation amount of about 10 times, the volume of the through hole is approximately It is preferable to assume up to less than 33460 cm ³ .

Accordingly, the volume of the through-hole is preferably in a 35,000 ³ order of 3000 cm ^3.
In view of this, it is preferable that the raw material supply mechanism 30 can supply the raw material 21 capable of generating about 100 m ³ to about 1000 m ³ of hydrogen per minute to the aqueous solution 11.

  The above-described raw material supply mechanism 30 is merely an example, and the raw material supply mechanism 30 is provided so as to supply the raw material 21 from the upper space US side toward the aqueous solution 11, and the raw material 21 is supplied from the upper space US side. What is necessary is just a structure which can be supplied toward the aqueous solution 11.

  On the other hand, in the present embodiment, the control unit (not shown) drives the motor 31 of the raw material supply mechanism 30 based on the pressure measurement result of the pressure measurement device 52 that measures the pressure of the upper space US of the aqueous solution storage unit 10, The supply amount of the raw material 21 supplied to the aqueous solution 11 is controlled so that the pressure in the upper space US becomes a predetermined first pressure (a required primary pressure).

As described above, since the control unit (not shown) controls the supply amount of the raw material 21 to be supplied to the aqueous solution 11, the control unit (not shown) grasps how much raw material 21 is supplied to the aqueous solution 11. It is possible to predict an increase in the concentration of by-products such as magnesium hydroxide in the aqueous solution 11 based on the total supply amount of the raw material 21 supplied to the aqueous solution 11 (for example, data of the concentration change is experimentally obtained). It is possible to make predictions based on that data.
Instead of such an experimental method, an increase in the concentration of by-products can be predicted by theoretical calculation.

  Therefore, the control unit (not shown) controls the drainage control valve 15B and the water supply control valve 16B based on the supply amount of the raw material 21 supplied to the aqueous solution 11, as described above. In order to prevent the reaction efficiency between the raw material 21 and the aqueous solution 11 from decreasing, management is performed so that the concentration of by-products in the aqueous solution 11 does not become too high.

  On the other hand, as shown in FIG. 1, the aqueous solution storage unit 10 includes a hydrogen discharge port 18 for discharging hydrogen in the upper space US toward a power generation device (not shown). A hydrogen supply unit 70 (also referred to as a hydrogen supply main pipe) connected to the hydrogen discharge port 18 and supplying hydrogen generated in the aqueous solution storage unit 10 to a power generation device (not shown) is provided.

  Further, the power generation system 1 is provided at a position near the hydrogen discharge port 18 on the hydrogen supply unit 70, and controls an electromagnetic valve 71 that controls whether hydrogen is discharged from the hydrogen discharge port 18. It has a pressure reducing valve 72 provided on the hydrogen supply part 70 remote from the outlet 18, and an electromagnetic valve 73 provided on the hydrogen supply part 70 further away from the hydrogen discharge port 18 than the pressure reducing valve 72. .

  The pressure reducing valve 72 changes the pressure of hydrogen from a predetermined first pressure (determined primary pressure) in the upper space US to a predetermined second pressure (determined secondary pressure) to be supplied to a power generator (not shown). It is for reducing the pressure.

  Further, the power generation system 1 includes a buffer mechanism 3 that stores hydrogen so as to be supplied to a power generation device (not shown).

  Specifically, the buffer mechanism 3 is connected to the buffer tank 80 at one end at a position between the pressure reducing valve 72 and the solenoid valve 73 of the hydrogen supply unit 70 and at the other end to the buffer tank 80, A drop branch line 81 (also referred to as a branch pipe) for drawing into the buffer tank 80, a booster 82 provided on the drop branch line 81, and a drop branch line 81 between the booster 82 and the buffer tank 80. And an electromagnetic valve 83 provided.

  The buffer mechanism 3 has one end connected to the buffer tank 80 and the other end connected to the hydrogen supply unit 70 on the power generation device side (not shown) with respect to the electromagnetic valve 73. Return line 84 (also referred to as a return pipe) for returning to the above, an electromagnetic valve 85 provided on the return line 84, and a pressure reducing valve provided on the return line 84 between the electromagnetic valve 85 and the hydrogen supply unit 70 86.

  Similarly to the pressure reducing valve 72, the pressure reducing valve 86 reduces the pressure of hydrogen to a predetermined second pressure (a required secondary pressure) to be supplied to a power generator (not shown) from a pressure of the buffer tank 80 described later. It is for doing.

  Then, the buffer mechanism 3 is filled with hydrogen by utilizing the time when there is no request for supplying hydrogen from a power generator (not shown).

  Specifically, a control unit (not shown) controls the solenoid valve 71 and the solenoid valve 83 to be opened and the solenoid valve 73 and the solenoid valve 85 to be closed. Control is performed so that the device 2 generates hydrogen, and drive control of the booster 82 is performed.

  Therefore, the hydrogen generated by the hydrogen generator 2 is supplied to the branch branch line 81 at a predetermined second pressure (the required secondary pressure) by the pressure reducing valve 72, but the pressure is increased by the pressure increasing device 82. Therefore, the buffer is set so that the pressure in the buffer tank 80 becomes the same first pressure as the predetermined first pressure (the required primary pressure) in the upper space US or the predetermined third pressure higher than the first pressure. The tank 80 can be filled with hydrogen.

  Note that the buffer mechanism 3 includes a pressure measuring device 87 (for example, a digital Manostar gauge) that measures the pressure in the buffer tank 80. The above-described process of filling the buffer tank 80 with hydrogen is performed by the pressure measuring device 87. Based on the measurement result of the pressure in the buffer tank 80 measured by 87, the pressure is adjusted to the first pressure or a predetermined third pressure higher than the first pressure, and when the target pressure is reached, hydrogen generation is performed. The drive of the device 2 is stopped, and the solenoid valves 71 and 83 are closed.

  Further, the buffer mechanism 3 includes a connection line 88 (also referred to as a connection pipe) connecting the buffer tank 80 and the emergency exhaust line 50, an electromagnetic valve 89 provided on the connection line 88 and controlling the presence or absence of emergency exhaust. When the measurement result of the pressure in the buffer tank 80 measured by the pressure measuring device 87 indicates an abnormally high pressure, the control unit (not shown) opens the solenoid valve 89 to open the buffer tank. The pressure reduction control is performed so that the pressure in 80 becomes the first pressure described above or a predetermined third pressure higher than the first pressure.

  However, in the present embodiment, the case where the buffer mechanism 3 is provided in a form branched from the hydrogen supply unit 70 has been described, but the buffer mechanism 3 may be provided on the hydrogen supply unit 70.

  For example, as a modified example of the buffer mechanism 3, the pressure reducing valve 72 is omitted, and the electromagnetic valve 71 is provided on the hydrogen supply unit 70 between the electromagnetic valves 73 from the aqueous solution storage unit 10 toward the power generation device (not shown). In addition to providing the valve 83 and the buffer tank 80, a configuration is conceivable in which the pressure reducing valve 86 is provided on the hydrogen supply unit 70 which is closer to the power generator than the electromagnetic valve 73. Hydrogen is always supplied to the power generator via the buffer mechanism 3.

  In both the present embodiment and the modification, the buffer mechanism 3 is provided between the aqueous solution storage unit 10 and the power generator (not shown), and stores the hydrogen generated in the aqueous solution storage unit 10. Will be able to do it.

  Even in the case of the modified example of the buffer mechanism 3, the buffer mechanism 3 connects the pressure measuring device 87 (for example, a digital manostar gauge) for measuring the pressure in the buffer tank 80 to the buffer tank 80 and the emergency exhaust line 50. And a solenoid valve 89 provided on the connection line 88 for controlling the presence or absence of emergency exhaust, and is provided on the hydrogen supply unit 70. The pressure increasing device 82 may be provided on the hydrogen supply unit 70 between the electromagnetic valve 83 and the electromagnetic valve 71.

  Since the control of the buffer mechanism 3 is considered to be simpler by the control unit of the hydrogen generator 2, the hydrogen generator 2 includes the buffer mechanism 3 and the hydrogen generator 2 includes the buffer mechanism 3. May include the hydrogen supply unit 70 up to a necessary position in relation to the above.

Next, the operation and the like of the power generation system 1 configured as described above will be described.
However, only the main operations will be described since the detailed operation has been described so far that the operation can be sufficiently understood.
In the following, description will be made on the assumption that the buffer tank 80 has already been filled with hydrogen.

  For example, when a request (command) for hydrogen supply reaches the hydrogen generator 2 from a power generator (not shown), the control unit of the hydrogen generator 2 checks the pressure in the upper space US of the aqueous solution storage unit 10, and checks the upper space US If the internal pressure is about the predetermined first pressure (the required primary pressure), the solenoid valves 71 and 73 are opened to start supplying hydrogen to the power generator, The driving of the raw material supply mechanism 30 is controlled so that the pressure in the upper space US of the aqueous solution storage unit 10 reduced by the supply of the water is maintained at a predetermined first pressure (a required primary pressure).

  On the other hand, the control unit of the hydrogen generator 2 confirms the pressure in the upper space US of the aqueous solution storage unit 10, and as a result, if the pressure in the upper space US is too low, opens the solenoid valve 85 to open the buffer tank 80. The hydrogen is supplied to a power generator (not shown), and the driving of the raw material supply mechanism 30 is controlled so that the pressure in the upper space US of the aqueous solution storage unit 10 becomes a predetermined first pressure (a required primary pressure). I do.

  In the case of the present embodiment, since the raw material 21 is supplied toward the large amount of the aqueous solution 11 stored in the aqueous solution storage unit 10, a by-product such as magnesium hydroxide is generated by the reaction between the raw material 21 and the aqueous solution 11. Even so, the by-product quickly diffuses into the aqueous solution 11, so that the reaction proceeds quickly and efficiently without being hindered. Therefore, the pressure in the upper space US of the aqueous solution storage unit 10 is reduced for a short time. To a predetermined first pressure (a required primary pressure).

  When the pressure in the upper space US of the aqueous solution storage unit 10 reaches a predetermined first pressure (the required primary pressure), the control unit of the hydrogen generator 2 opens the electromagnetic valves 71 and 73, The electromagnetic valve 85 is closed, and the supply of hydrogen to the power generator (not shown) is switched from the buffer tank 80 to the aqueous solution storage unit 10.

  As described above, in the present embodiment, since the reaction efficiency between the raw material 21 and the aqueous solution 11 is high, the decrease in the pressure in the upper space US of the aqueous solution storage unit 10 due to the supply of hydrogen to the power generation device (not shown) is prevented. Control for suppression is also easy to perform.

  In addition, since the raw material 21 is supplied to the sufficiently prepared aqueous solution 11, the high reaction efficiency can be continuously maintained.

  On the other hand, when the control unit of the hydrogen generator 2 supplies hydrogen from the aqueous solution storage unit 10 to the power generation device (not shown), the pressure in the upper space US of the aqueous solution storage unit 10 becomes unsuitable for supplying hydrogen for some reason. If the pressure is likely to drop to an unsatisfactory level, the solenoid valve 71 is closed and the solenoid valve 85 is opened again to stop the supply of hydrogen to the power generator without stopping the pressure in the upper space US of the aqueous solution storage unit 10. Perform recovery.

When the control unit of the hydrogen generator 2 receives a request (command) for stopping the supply of hydrogen from a power generator (not shown), it checks the pressure in the buffer tank 80 before stopping the operation of the hydrogen generator 2. If the buffer tank 80 needs to be filled with hydrogen, a process of stopping the operation of the hydrogen generator 2 is performed after the filling.
On the other hand, when it is not necessary to fill the buffer tank 80 with hydrogen, the control unit of the hydrogen generator 2 performs a process of stopping the operation of the hydrogen generator 2 without performing filling.

  In the present embodiment, the provision of the buffer mechanism 3 further enhances the speed of hydrogen supply at the start of supply of hydrogen to the power generator (not shown) and the stability of the amount of hydrogen supply during hydrogen supply. It has become something.

However, as described above, in the present embodiment, by supplying the raw material 21 toward the large amount of the aqueous solution 11 stored in the aqueous solution storage unit 10, the reaction efficiency between the raw material 21 and the aqueous solution 11 becomes high. At the start of the supply of hydrogen to the power generator (not shown), the required amount of hydrogen is easily generated quickly, and the controllability of the hydrogen supply during hydrogen supply is high. The provision of the mechanism 3 is not an essential requirement, and the buffer mechanism 3 may be omitted.
In order to further increase the reaction efficiency between the raw material 21 and the aqueous solution 11, the hydrogen generator 2 may use a temperature control means for increasing the temperature of the aqueous solution 11 (for example, within a temperature range where the aqueous solution 11 does not boil). (A temperature control means for heating).

(2nd Embodiment)
Next, a power generation system 1 according to a second embodiment will be described with reference to FIG.
FIG. 2 is a cross-sectional view illustrating a power generation system 1 according to a second embodiment of the present invention.

  In the first embodiment, a turbine generator in which a power generation device (not shown) drives a turbine using hydrogen as fuel has been assumed.

  On the other hand, in the second embodiment, it is assumed that a power generator not shown is a general fuel cell, and a configuration suitable for using a fuel cell as the power generator is added to the configuration of the first embodiment. It has become.

  For this reason, the basic configuration of the power generation system 1 of the second embodiment is the same as that of the first embodiment, and therefore, different points will be mainly described below, and description of the same points may be omitted. .

  As shown in FIG. 2, in addition to the configuration of the first embodiment, the power generation system 1 according to the second embodiment includes an aqueous solution from the pressure reducing valve 72 to the buffer mechanism 3 (more specifically, from the drop branch line 81). A purification mechanism 4 for increasing the purity of hydrogen supplied from the storage unit 10 to the power generation device (and the buffer mechanism 3) (not shown) is provided.

  Since the control of the purification mechanism 4 is considered to be simpler by the control unit of the hydrogen generator 2, the hydrogen generator 2 may include the purification mechanism 4.

  The purifying mechanism 4 includes a first dehydrating unit 91A (for example, a molecular sieve) provided on the hydrogen supply unit 70 between the pressure reducing valve 72 and the incoming branch line 81, and a side closer to the incoming branch line 81 than the first dewatering unit 91A. A first impurity gas removal unit 92A provided on the hydrogen supply unit 70 serving as a first supply unit, a first upstream electromagnetic valve 93A provided on the hydrogen supply unit 70 between the pressure reducing valve 72 and the first dehydration unit 91A, A first downstream solenoid valve 94A provided on the hydrogen supply unit 70 between the first impurity gas removal unit 92A and the incoming branch line 81;

The first dehydrating unit 91A and the first impurity gas removing unit 92A function as a first purifying unit of the purifying mechanism 4.
Further, as mentioned in the first embodiment, the buffer mechanism 3 can be omitted, and in this case, the lead-in branch line 81 and the solenoid valve 73 become unnecessary.

  For this reason, when the buffer mechanism 3 is omitted, the purification mechanism 4 includes the first dehydrating unit 91A provided on the hydrogen supply unit 70 between the pressure reducing valve 72 and the power generator (not shown) rather than the pressure reducing valve 72. For example, a molecular sieve), a first impurity gas removal unit 92A provided on the hydrogen supply unit 70 on the power generation device side (not shown) with respect to the first dehydration unit 91A, and a pressure reducing valve 72 and the first dehydration unit 91A. A first upstream solenoid valve 93A provided on the hydrogen supply unit 70 of the first embodiment, and a first downstream solenoid valve 94A provided on the hydrogen supply unit 70 between the first impurity gas removal unit 92A and the power generation device (not shown). And

  For example, in the present embodiment, a silica gel molecular sieve that can be dried by supplying a heating gas having a low dew point at a low temperature (for example, about 100 ° C. or less) to the first dehydrating unit 91A is used.

For this reason, in the present embodiment, the purification mechanism 4 supplies the dry gas (for example, a low-activity gas such as nitrogen with a low dew point or an inert gas such as helium or argon with a low dew point) to the first dehydrating unit 91A. A dry gas supply line 95 (including a dry gas supply pipe) having a first supply control solenoid valve 95A for controlling the presence / absence and connected to the hydrogen supply unit 70 between the first dehydration unit 91A and the first impurity gas removal unit 92A. ) And a first exhaust control solenoid valve 96A that is opened when exhausting the dry gas, and is connected to the hydrogen supply unit 70 between the first upstream solenoid valve 93A and the first dehydration unit 91A. A dry gas exhaust line 96 (also referred to as a dry gas exhaust pipe) is provided. As will be described later, once the first dehydrating unit 91A absorbs moisture, the drying process of the first dehydrating unit 91A is performed. By regenerating moisture absorption performance by doing It has become to so that.
The drying gas is slightly heated by a heating device (not shown) and supplied at a temperature higher than room temperature (for example, 25 ° C.) (for example, 50 ° C. or higher) and 100 ° C. or lower.

Further, in the present embodiment, for example, when magnesium chloride is used as a material for generating the raw material 21 in the first impurity gas removing unit 92A, the raw material 21 is generated in an unreacted state when the raw material 21 is generated. A chemical filter capable of removing impurity gas (for example, chlorine gas, hydrochloric acid gas, etc.) generated in association with chlorine in magnesium chloride remaining in 21 is used.
In the present embodiment, a filter for removing chlorine gas and a filter for removing hydrochloric acid gas are arranged in series as the first impurity gas removing unit 92A.

  However, since the first impurity gas removing section 92A is intended to remove the impurity gas generated when hydrogen is generated in the aqueous solution storage section 10, the type of the chemical filter to be used depends on the raw material 21. And the aqueous solution 11 are selected.

  On the other hand, in the present embodiment, one end of the purification mechanism 4 is connected to the hydrogen supply unit 70 between the pressure reducing valve 72 and the first upstream solenoid valve 93A, and the other end is connected to the first downstream solenoid valve 94A. A bypass line 70A (also referred to as a bypass pipe) connected to the hydrogen supply unit 70 between the branch lines 81 is provided.

  As mentioned earlier, since the buffer mechanism 3 can be omitted, in this case, the drop branch line 81 and the solenoid valve 73 are not required, so the other end of the bypass line 70A is connected to the first downstream side. This is connected to the hydrogen supply unit 70 on the power generation device side (not shown) with respect to the solenoid valve 94A.

  The purifying mechanism 4 is provided on a second dehydrating section 91B (for example, molecular sieve) provided on the bypass line 70A and on a bypass line 70A on the power generation device side (not shown) with respect to the second dehydrating section 91B. The second impurity gas removing unit 92B and the second upstream provided on the bypass line 70A on the pressure reducing valve 72 side from the second dehydrating unit 91B (on the bypass line 70A on one end side of the bypass line 70A from the second dehydrating unit 91B). The side solenoid valve 93B and the second impurity gas removal unit 92B are provided on a bypass line 70A on the power generation device side (not shown) (on the other side of the bypass line 70A from the second impurity gas removal unit 92B on the bypass line 70A). A second downstream solenoid valve 94B.

  Note that the second dehydrating unit 91B and the second impurity gas removing unit 92B function as a second purifying unit of the purifying mechanism 4 that performs the same function as the first purifying unit. Similarly to the part 91A, a silica gel molecular sieve that can be dried by supplying a heating gas having a low dew point at a low temperature (for example, about 100 ° C. or less) is used.

  Similarly to the first impurity gas removing section 92A, a chemical filter capable of removing chlorine gas, hydrochloric acid gas, etc. is used for the second impurity gas removing section 92B. And a filter for removing hydrochloric acid gas are arranged in series.

  The drying gas supply line 95 is connected to the bypass line 70A between the second dehydrating section 91B and the second impurity gas removing section 92B, and the drying gas exhaust line 96 is connected to the second upstream solenoid valve 93B and the second dehydrating section 93B. The purification mechanism 4 is connected to the detour line 70A between the sections 91B, and is provided on the drying gas supply line 95 on the detour line 70A side from the first supply control solenoid valve 95A, and the drying gas (for example, nitrogen or the like having a low dew point) is provided. A second supply control solenoid valve 95B for controlling whether or not a low-activity gas or an inert gas having a low dew point, such as helium or argon, is supplied to the second dehydrating section 91B; A second exhaust control electromagnetic valve 96B provided on the dry gas exhaust line 96 closer to the bypass line 70A than the electromagnetic valve 96A and opened when exhausting the dry gas. To have.

  The supply of the dry gas to the dry gas supply line 95 is performed at the position of the dry gas supply line 95 between the first supply control solenoid valve 95A and the second supply control solenoid valve 95B. The exhaust of the dry gas from the gas exhaust line 96 is performed at a position of the dry gas exhaust line 96 between the first exhaust control electromagnetic valve 96A and the second exhaust control electromagnetic valve 96B.

  Therefore, even in the second dehydrating unit 91B, even if the second dehydrating unit 91B once absorbs water, the moisture absorbing performance can be regenerated by performing the drying process of the second dehydrating unit 91B.

Next, the operation of the purification mechanism 4 will be described.
Note that this operation is described on the assumption that hydrogen is being supplied from the aqueous solution storage unit 10 to the power generation device or the buffer tank 80 (not shown), and the supply of hydrogen described in the first embodiment is started. Description of time and the like will be omitted.

  For example, the control unit of the hydrogen generator 2 opens the first upstream solenoid valve 93A and the first downstream solenoid valve 94A, and opens the second upstream solenoid valve 93B, the second downstream solenoid valve 94B, and the first supply control. The electromagnetic valve 95A and the first exhaust control electromagnetic valve 96A are closed, and hydrogen passes through the first purifying section (the first dehydrating section 91A and the first impurity gas removing section 92A) of the purifying mechanism 4 to generate power (not shown). Is controlled to open the second supply control solenoid valve 95B and the second exhaust control solenoid valve 96B so that the dry gas passes through the second dehydrating section 91B. .

  Therefore, while the first dehydrating unit 91A operates to absorb the moisture in the hydrogen, the drying process of the second dehydrating unit 91B is performed, and the performance of the second dehydrating unit 91B to absorb the moisture is reproduced. You.

  On the other hand, when a predetermined amount of hydrogen passes through the first dehydrating unit 91A, the control unit of the hydrogen generator 2 opens the second upstream solenoid valve 93B and the second downstream solenoid valve 94B, and the first upstream The side solenoid valve 93A, the first downstream side solenoid valve 94A, the second supply control solenoid valve 95B, and the second exhaust control solenoid valve 96B are closed, and hydrogen is purified by the second purification section (second dehydration section 91B) of the purification mechanism 4. And the control is switched so that the dry gas passes through the first dehydrating unit 91A at this time so that the dry gas passes through the first dehydrating unit 91A. The unit also performs control to open the first supply control solenoid valve 95A and the first exhaust control solenoid valve 96A.

  Therefore, while the second dehydrating unit 91B operates to absorb the moisture in the hydrogen, the drying process of the first dehydrating unit 91A is performed, and the performance of the first dehydrating unit 91A to absorb the moisture is regenerated. You.

  As described above, the purifying mechanism 4 includes the first purifying section (the first dehydrating section 91A and the first impurity gas removing section 92A) and the second purifying section (the second dehydrating section 91B and the second impurity gas removing section 92B). The second dehydration unit 91B of the second purification unit can be dried when supplying hydrogen to the power generator or the buffer tank 80 (not shown) through the first purification unit, and the second purification unit When the hydrogen is supplied to the power generation device or the buffer tank 80 (not shown), the first dehydrating unit 91A of the first purification unit can be dried, so that the hydrogen is supplied to the power generation device or the buffer tank 80 (not shown). The regeneration processing of the first dehydrating unit 91A and the second dehydrating unit 91B can be performed without stopping the supply of water.

  Further, if necessary, when the hydrogen is supplied to the power generator or the buffer tank 80 (not shown) through the first purifying section, the second impurity gas removing section 92B of the second purifying section is replaced, and the second purifying section is replaced. When the hydrogen is supplied to the power generation device or the buffer tank 80 (not shown) by passing through the first purifying section, the first impurity gas removing section 92A of the first purifying section can be exchanged, so that the first impurity gas removing section 92A, The replacement operation of the second impurity gas removing unit 92B can also be performed without stopping the supply of hydrogen to the power generator (not shown) or the buffer tank 80.

  Further, since the purification mechanism 4 is provided between the aqueous solution storage unit 10 and the power generation device and the buffer mechanism 3 (not shown), high-purity hydrogen can be supplied to the fuel cell as the power generation device. it can.

  As described above, the present invention has been described based on the specific embodiments. However, the present invention is not limited to the above-described specific embodiments, and may be appropriately modified or improved. , Which will be apparent to those skilled in the art from the description of the claims.

DESCRIPTION OF SYMBOLS 1 Power generation system 2 Hydrogen generator 3 Buffer mechanism 4 Purification mechanism 10 Aqueous solution storage unit 11 Aqueous solution 12 Upper level sensor 13 Lower level sensor 14 Partition unit 14A Through hole 15 Drainage port 15A Drainage line 15B Drainage control valve 16 Water supply port 16A Water supply line 16B Water supply control valve 17 Raw material receiving hole 18 Hydrogen outlet 20 Raw material storage unit 21 Raw material 22 Work door 23 Raw material supply hole 24 Distance measuring device 30 Raw material supply mechanism 31 Motor 32 Disk 32A, 32B Through hole 33 Shaft 40 Stirring mechanism 41 Motor 42 Propeller 43 Shaft 50 Emergency exhaust line 51 Solenoid valve 52 Pressure measuring device 61 Pressure measuring device 62 Gas supply line 63 Solenoid valve 70 Hydrogen supply unit 70A Detour line 71 Solenoid valve 72 Pressure reducing valve 73 Solenoid valve 80 Buffer tank 81 Retraction branch line 82 Booster device 83 Solenoid valve 84 Sending line 85 Solenoid valve 86 Pressure reducing valve 87 Pressure measuring device 88 Connection line 89 Solenoid valve 91A First dehydrating section 91B Second dehydrating section 92A First impurity gas removing section 92B Second impurity gas removing section 93A First upstream electromagnetic valve 93B Second upstream solenoid valve 94A First downstream solenoid valve 94B Second downstream solenoid valve 95 Dry gas supply line 95A First supply control solenoid valve 95B Second supply control solenoid valve 96 Dry gas exhaust line 96A First exhaust control solenoid Valve 96B Second exhaust control solenoid valve LS Lower space LSF Water surface O Center of rotation US Upper space US1 Upper space

Claims (11)

A power generation system using hydrogen,
The power generation system,
A power generator,
A hydrogen generator that generates the hydrogen to be supplied to the power generator,
The hydrogen generator,
An aqueous solution storage unit for storing the aqueous solution;
A raw material storage unit that stores a raw material containing magnesium in a state where the hydrogen can be generated in the reaction with the aqueous solution,
A power supply system for supplying the raw material from the raw material storage unit to the aqueous solution storage unit. The aqueous solution storage unit includes an upper space where the aqueous solution does not exist above the aqueous solution,
The raw material supply mechanism is provided to supply the raw material toward the aqueous solution from the upper space side,
The hydrogen generator,
A pressure measuring device for measuring the pressure of the upper space,
A control unit that drives the raw material supply mechanism based on a pressure measurement result of the pressure measurement device and controls a supply amount of the raw material supplied toward the aqueous solution. A power generation system according to claim 1. The aqueous solution storage unit includes:
A lower space in which the aqueous solution is located below the upper space,
A partition part for vertically dividing the lower space,
A drain port provided below the partition portion to drain the aqueous solution,
A water supply port provided above the partition portion to supply the aqueous solution,
3. The partition according to claim 2, wherein the partition has a plurality of through-holes provided so that by-products generated by a reaction between the raw material and the aqueous solution can precipitate below the partition. 3. Power generation system. The hydrogen generator,
A drainage control valve that controls drainage of the aqueous solution from the drainage port,
A water supply control valve for controlling water supply of the aqueous solution from the water supply port,
The power generation system according to claim 3, wherein the control unit controls the drainage control valve and the water supply control valve based on a supply amount of the raw material supplied toward the aqueous solution.   2. The power generation system according to claim 1, further comprising: a buffer mechanism provided between the aqueous solution storage unit and the power generation device, wherein the hydrogen is generated in the aqueous solution storage unit. 3. The power generation system according to claim 4. The power generation system includes a purification mechanism provided between the aqueous solution storage unit and the hydrogen generator to reach the power generation device and the buffer mechanism,
The purification mechanism,
A first purification section having a first dehydration section and a first impurity gas removal section;
A second dehydration unit and a second purification unit having a second impurity gas removal unit,
When the hydrogen is supplied to the power generation device or the buffer mechanism by passing through the first purifying section, the second dehydrating section of the second purifying section can be dried and passed through the second purifying section. The power generation system according to claim 5, wherein the first dehydration unit of the first purification unit can be dried when supplying the hydrogen to the power generation device or the buffer mechanism. The power generation system includes a purification mechanism provided between the aqueous solution storage unit and the hydrogen to the power generation device,
The purification mechanism,
A first purification section having a first dehydration section and a first impurity gas removal section;
A second dehydration unit and a second purification unit having a second impurity gas removal unit,
When the hydrogen is supplied to the power generation device by passing through the first purification unit, the second dehydration unit of the second purification unit can be dried, and the hydrogen is passed through the second purification unit to remove the hydrogen. The power generation system according to any one of claims 1 to 4, wherein the first dehydration unit of the first purification unit is capable of performing a drying process when supplying the power to the power generation device. A hydrogen generator,
The hydrogen generator,
An aqueous solution storage unit for storing the aqueous solution;
A raw material storage unit for storing a raw material containing magnesium capable of generating hydrogen by reaction with the aqueous solution,
A hydrogen supply device for supplying the raw material from the raw material storage unit to the aqueous solution storage unit. The aqueous solution storage unit includes an upper space where the aqueous solution does not exist above the aqueous solution,
The raw material supply mechanism is provided to supply the raw material toward the aqueous solution from the upper space side,
The hydrogen generator,
A pressure measuring device for measuring the pressure of the upper space,
9. A control unit that drives the raw material supply mechanism based on a measurement result of the pressure of the pressure measuring device and controls a supply amount of the raw material supplied to the aqueous solution. The hydrogen generator according to item 1. The aqueous solution storage unit includes:
A lower space in which the aqueous solution is located below the upper space,
A partition part for vertically dividing the lower space,
A drain port provided below the partition portion to drain the aqueous solution,
A water supply port provided above the partition portion to supply the aqueous solution,
10. The partition according to claim 9, wherein the partition has a plurality of through-holes provided so that a by-product generated by a reaction between the raw material and the aqueous solution can be precipitated below the partition. Hydrogen generator. The hydrogen generator,
A drainage control valve for controlling the drainage amount of the aqueous solution drained from the drainage port,
A water supply control valve that controls a water supply amount of the aqueous solution supplied from the water supply port,
The power generation system according to claim 10, wherein the control unit controls the drainage control valve and the water supply control valve based on a supply amount of the raw material supplied toward the aqueous solution.