JP6812252B2 - Hydrogen production equipment, power generation system and hydrogen production method - Google Patents

Description

The present invention relates to a hydrogen production facility for producing hydrogen, a power generation system, and a hydrogen production method.

In recent years, hydrogen has been attracting attention as a clean energy. Then, conventionally, a technique for producing hydrogen by utilizing the heat generated when power is generated by thermal power generation or the like has been proposed (see, for example, Patent Document 1). In this technology, hydrogen is produced by heating a heat medium using exhaust gas during power generation as a heat source.

JP 2015-187049

Here, in recent years, power generation using renewable energy such as solar power generation and wind power generation has been desired, and it is expected that the introduction will be accelerated in the future. However, since heat is not generated during power generation in photovoltaic power generation, wind power generation, etc., it is not possible to effectively utilize the heat generated during power generation to produce hydrogen as in the above-mentioned conventional technology.

The present invention has been made to solve the above problems, and provides a hydrogen production facility, a power generation system, and a hydrogen production method capable of producing hydrogen without using heat generated during power generation as a heat source. With the goal.

In order to achieve the above object, the hydrogen production facility according to one aspect of the present invention is a hydrogen production facility that produces hydrogen, a heater that heats the molten salt using electric power, and the heated molten salt. It is provided with a dehydrogenation device that produces hydrogen by dehydrogenating an organic compound using the heat possessed by the substance.

According to this, the hydrogen production facility includes a heater that heats the molten salt by using electric power, and a dehydrogenation device that generates hydrogen by using the heat of the heated molten salt. As a result, even if heat is not generated during power generation, the heat of the molten salt can be used as a heat source for generating hydrogen by heating the molten salt using the generated power. For example, if the amount of solar power generation, wind power generation, etc. introduced increases in the future, surplus power may be generated, but by heating the molten salt with this surplus power, it is possible to effectively utilize the surplus power. it can. Further, since the molten salt can store a relatively large amount of heat, the surplus electric power can be converted into the amount of heat of the molten salt and stored. As described above, according to the hydrogen production facility, hydrogen can be produced without using the heat generated during power generation as a heat source.

Further, the dehydrogenation apparatus includes a heat exchanger that exchanges heat between the heated molten salt and the heat medium to heat the heat medium, and the dehydrogenation apparatus transfers the heat of the heated heat medium to the organic. It may be added to the compound to dehydrogenate and produce hydrogen.

According to this, the hydrogen production facility is equipped with a heat exchanger that heats the heat medium by heat exchange between the molten salt and the heat medium, and the dehydrogenation device applies the heat of the heat medium to the organic compound to generate hydrogen. To generate. As a result, even when the temperature of the molten salt is high and the temperature is not suitable for producing hydrogen, heat of the optimum temperature for producing hydrogen can be applied to the organic compound through the heat medium. it can.

Further, the steam turbine to which the heated heat medium is supplied is provided, and the dehydrogenation apparatus dehydrogenates the organic compound by applying the heat of the heat medium discharged from the steam turbine to the organic compound. May be performed to generate hydrogen.

According to this, the hydrogen production facility is provided with a steam turbine to which a heat medium is supplied, and the dehydrogenation device generates hydrogen by applying the heat of the heat medium emitted from the steam turbine to the organic compound. As a result, even when the temperature of the molten salt is high, the temperature of the heat medium can be lowered by driving the steam turbine on the heat medium, and heat of the optimum temperature can be added to the organic compound.

Further, a generator coaxial with the steam turbine may be provided.

According to this, since the hydrogen production facility is provided with a generator coaxial with the steam turbine, power can be generated by driving the steam turbine with a heat medium.

Further, a compressor coaxial with the steam turbine may be provided, and the compressor may compress the hydrogen generated by the dehydrogenation device to generate compressed hydrogen.

According to this, since the hydrogen production facility is equipped with a compressor coaxial with the steam turbine, the compressor can compress hydrogen and generate compressed hydrogen by driving the steam turbine with a heat medium. ..

Further, a binary power generation facility to which the heat medium discharged from the dehydrogenation apparatus is supplied may be provided.

According to this, the hydrogen production facility is equipped with a binary power generation facility to which the heat medium emitted from the dehydrogenation device is supplied. That is, by using the heat of the heat medium for hydrogen generation and then using the remaining heat for binary power generation, it is possible to effectively utilize the heat of the heat medium.

Further, the heater may heat the molten salt by using the surplus electric power of the electric power generated by the renewable energy.

According to this, in the hydrogen production facility, the heater can effectively utilize the surplus electric power by heating the molten salt with the surplus electric power of the electric power generated by the renewable energy. Further, by heating the molten salt using the electric power generated by the renewable energy, it is possible to reduce the amount of carbon dioxide emitted in the process of producing hydrogen.

Further, the dehydrogenation apparatus may supply the generated hydrogen to the thermal power generation facility.

According to this, in the hydrogen production facility, the dehydrogenation device supplies the generated hydrogen to the thermal power generation facility, so that the emission amount of carbon dioxide in the thermal power generation facility can be reduced.

Further, the hydrogen production facility according to another aspect of the present invention is a hydrogen production facility that produces hydrogen, and includes a heater that heats the molten salt using renewable energy and the heated molten salt. A dehydrogenation device that produces hydrogen by dehydrogenating an organic compound using heat may be provided.

According to this, the hydrogen production facility includes a heater that heats the molten salt using renewable energy and a dehydrogenation device that generates hydrogen using the heat of the heated molten salt. In other words, if the amount of power generated by renewable energy such as solar power generation and wind power generation increases in the future, surplus power may be generated, but the molten salt is heated using the renewable energy equivalent to the surplus power. By doing so, it is possible to effectively utilize renewable energy and suppress the generation of surplus electricity. For example, the heat of sunlight can be collected to heat the molten salt, or the rotational motion of the wind turbine can be converted into heat to heat the molten salt. Further, since the molten salt can store a relatively large amount of heat, the renewable energy can be converted into the amount of heat of the molten salt and stored. As described above, according to the hydrogen production facility, hydrogen can be produced without using the heat generated during power generation as a heat source.

Further, the present invention can be realized not only as such a hydrogen production facility but also as the following power generation system. That is, the power generation system includes the above-mentioned hydrogen production facility and a power generation facility that generates power from renewable energy, and the heater of the hydrogen production facility uses the surplus power of the power generated by the power generation facility. Heat the molten salt. In addition, the power generation system includes the above-mentioned hydrogen production facility and a thermal power generation facility that co-fires hydrogen produced in the hydrogen production facility and fossil fuel.

The present invention can also be realized as the following hydrogen production method. That is, the hydrogen production method includes a heating step of heating a molten salt using electric power and a dehydrogenation step of producing hydrogen by dehydrogenating an organic compound using the heat of the heated molten salt. Including. Further, the present invention can also be realized as a control device for performing each step of such a hydrogen production method. Further, the present invention can also be realized as an integrated circuit including a characteristic processing unit included in the control device. Further, the present invention is realized as a program for causing a computer to execute a characteristic process included in the hydrogen production method, or a computer-readable CD-ROM (Compact Disc-Read Only Memory) in which the program is recorded. It can also be realized as a recording medium of. Then, such a program can be distributed via a recording medium such as a CD-ROM and a transmission medium such as the Internet.

According to the hydrogen production facility of the present invention, hydrogen can be produced without using the heat generated during power generation as a heat source.

It is a schematic diagram which shows the structure of the power generation system provided with the hydrogen production facility which concerns on embodiment of this invention. It is a schematic diagram which shows the structure of the power generation part which has the hydrogen production facility which concerns on embodiment of this invention. It is a block diagram which shows the functional structure of the control device which concerns on embodiment of this invention. It is a flowchart which shows the process performed by the control device which concerns on embodiment of this invention. It is a schematic diagram which shows the structure of the power generation part which has the hydrogen production facility which concerns on modification 1 of the Embodiment of this invention. It is a schematic diagram which shows the structure of the power generation part which has the hydrogen production facility which concerns on modification 2 of the Embodiment of this invention.

Hereinafter, a hydrogen production facility, a power generation system, and a hydrogen production method according to an embodiment of the present invention and a modification thereof will be described with reference to the drawings. It should be noted that the embodiments and modifications thereof described below are all comprehensive or specific examples. Numerical values, shapes, materials, components, arrangement positions and connection forms of components, steps, sequence of steps, etc. shown in the following embodiments and modifications thereof are examples, and are not intended to limit the present invention. .. Further, among the components in the following embodiments and modifications thereof, the components not described in the independent claims indicating the highest level concept will be described as arbitrary components.

(Embodiment)
First, the configuration of the power generation system 1 including the hydrogen production facility 100 will be described. FIG. 1 is a schematic view showing a configuration of a power generation system 1 including a hydrogen production facility 100 according to an embodiment of the present invention.

The power generation system 1 is a system that produces hydrogen using electric power generated by renewable energy and supplies the produced hydrogen to a thermal power plant to generate electricity. Specifically, as shown in FIG. 1, the power generation system 1 controls a power generation unit 10 having a hydrogen production facility 100, a first power generation facility 200, and a second power generation facility 300, and a device included in the power generation unit 10. It includes a control device 20.

The hydrogen production facility 100 is a facility for producing hydrogen. That is, the hydrogen production facility 100 produces hydrogen using the electric power generated by the first power generation facility 200, and supplies the produced hydrogen to the second power generation facility 300. The hydrogen produced by the hydrogen production facility 100 is hydrogen at normal temperature and pressure, or compressed hydrogen at high pressure.

The first power generation facility 200 is a power generation facility that generates power using renewable energy. Here, the renewable energy includes solar power, wind power, hydropower, wave power, biomass, geothermal power, etc., but for convenience of explanation, solar power or wind power will be illustrated below. That is, the first power generation facility 200 is a solar power generation facility or a wind power generation facility.

The second power generation facility 300 is a thermal power generation facility that co-fires hydrogen produced by the hydrogen production facility 100 and fossil fuel. That is, the second power generation facility 300 has a boiler (constant pressure once-through boiler or the like) capable of co-firing hydrogen produced by the hydrogen production facility 100 with fossil fuels such as coal and petroleum. Alternatively, the second power generation facility 300 has a gas turbine capable of co-firing compressed hydrogen produced by the hydrogen production facility 100 with fossil fuel such as natural gas.

The control device 20 performs various controls for starting, stopping, and generating power of the first power generation facility 200, and also controls the electric power supplied to the hydrogen production facility 100. For example, the control device 20 controls to supply the surplus electric power to the hydrogen production facility 100 when the surplus electric power is generated in the electric power generated by the first power generation facility 200.

In addition, the control device 20 performs various controls for the hydrogen production facility 100 to produce hydrogen, and also controls the hydrogen supplied to the second power generation facility 300. For example, when the second power generation facility 300 has a conventional thermal power generation facility, the control device 20 controls to produce hydrogen at normal temperature and pressure and supply it to the second power generation facility 300. Alternatively, when the second power generation facility 300 has a gas turbine power generation facility, the control device 20 controls to produce compressed hydrogen and supply it to the second power generation facility 300.

In addition, the control device 20 performs various controls for starting and stopping the second power generation facility 300 and for generating power. For example, the control device 20 controls the co-firing ratio of hydrogen supplied from the hydrogen production facility 100 and fossil fuel, and burns the hydrogen in a boiler or a gas turbine.

Next, the configuration of the hydrogen production facility 100 will be described in detail. FIG. 2 is a schematic view showing a configuration of a power generation unit 10 having a hydrogen production facility 100 according to an embodiment of the present invention.

As shown in FIG. 2, the hydrogen production facility 100 includes a heater 110, a high temperature tank 111, a low temperature tank 112, a heat exchanger 120, a steam turbine 121, a generator 122, a compressor 123, and dehydration. It is equipped with a base device 130 and a binary power generation facility 140. Hereinafter, each component included in the hydrogen production facility 100 will be specifically described.

The heater 110 is a device that heats the molten salt using electric power. In the present embodiment, the heater 110 heats the molten salt by using the surplus electric power of the electric power generated by the renewable energy. That is, the heater 110 heats the molten salt (molten salt y in the figure) by using the surplus electric power of the electric power generated by the first power generation facility 200.

Specifically, the heater 110 uses, for example, an electric heater in which an electric current is passed through a resistor to generate heat to heat the object, or an electric heater in which an electric current is passed through a coil to induce heating (IH) to heat the object. Equipment for heating. The heater 110 is not limited to the above example, and any device may be used as long as the object can be heated by electric power.

Further, the molten salt y heated by the heater 110 is a salt (solid) in a molten state (liquid), and by heating to a high temperature, a very large capacity of heat can be stored. .. As the molten salt y, for example, a mixture of potassium nitrate and sodium nitrate can be used, and in this case, heat can be stored by heating to about 560 ° C. with respect to a melting point of about 220 ° C. Any kind of molten salt y may be used, and it is appropriately selected depending on the required heat storage capacity, temperature, and the like.

The high temperature tank 111 is a tank arranged between the outlet of the heater 110 and the inlet of the heat exchanger 120 in the circulation path of the molten salt y, and stores the high temperature molten salt y. That is, the molten salt y heated by the heater 110 is stored in the high temperature tank 111 to store heat. The high temperature tank 111 stores a high temperature molten salt y such as 560 ° C. Further, the molten salt y stored in the high temperature tank 111 is sent to the heat exchanger 120 and cooled to become the low temperature molten salt y.

The low temperature tank 112 is a tank arranged between the outlet of the heat exchanger 120 and the inlet of the heater 110 in the circulation path of the molten salt y, and stores the low temperature molten salt y. That is, the molten salt y cooled by the heat exchanger 120 is collected and stored in the low temperature tank 112 by the pump 113. The low temperature tank 112 stores the molten salt y having a temperature higher than the melting point, such as 290 ° C. Further, the low-temperature molten salt y stored in the low-temperature tank 112 is sent to the heater 110 by the pump 114 to be heated, and becomes the high-temperature molten salt y again.

In this way, the molten salt y circulates in the heater 110, the high temperature tank 111, the heat exchanger 120, and the low temperature tank 112, and repeats high temperature and low temperature to transfer heat.

The heat exchanger 120 is a device that exchanges heat between the heated molten salt y and the heat medium (heat medium w in the figure). That is, the heat exchanger 120 cools the molten salt y heated by the heater 110 and heats the heat medium w. For example, as the heat exchanger 120, a heater that cools the molten salt y and heats the heat medium w by flowing the molten salt y through the pipe and passing the heat medium w around the molten salt y can be used. .. In the present embodiment, the heat medium w is high-temperature water (pure water) or steam, but any heat medium may be used and is appropriately selected depending on the required temperature and the like.

The steam turbine 121 is a turbine driven by the energy of the heated heat medium w. That is, the steam turbine 121 is supplied with the heat medium w heated by the heat exchanger 120 and rotates. Specifically, for example, a high-temperature and high-pressure heat medium w (steam) of about 535 ° C. is sent to the steam turbine 121 through a pipe to rotate the steam turbine 121. Further, for example, the heat medium w1 (steam) having a temperature of about 380 ° C. is extracted from the steam turbine 121 and sent to the dehydrogenation device 130.

In the present embodiment, the steam turbine 121 has only one steam turbine, but it may have a plurality of turbines such as a high pressure turbine, a medium pressure turbine, and a low pressure turbine. It may be configured.

The generator 122 is a turbine generator that generates electric power by converting the rotational force of the steam turbine 121 into electric power. Specifically, the generator 122 is coaxial with the steam turbine 121, and when the shaft of the steam turbine 121 rotates, the shaft of the generator 122 also rotates to generate electricity. The electric power generated by the generator 122 can be used for the internal electric power of the power generation system 1 or can be transmitted to the outside.

The compressor 123 is a device capable of compressing a fluid by the rotational force of the steam turbine 121. Specifically, the compressor 123 is coaxial with the steam turbine 121, and when the shaft of the steam turbine 121 rotates, the shaft of the compressor 123 also rotates to compress the fluid. In the present embodiment, the compressor 123 compresses the hydrogen generated by the dehydrogenation device 130 to generate compressed hydrogen. The compressor 123 compresses hydrogen to, for example, about several tens of MPa. Then, the compressed hydrogen generated by the compressor 123 is stored in the compressed hydrogen tank 134.

The dehydrogenation apparatus 130 generates hydrogen by dehydrogenating an organic compound using the heat of the heated molten salt y. Specifically, the dehydrogenation apparatus 130 dehydrogenates by applying the heat of the heated heat medium w1 to the organic compound to generate hydrogen. That is, the dehydrogenation device 130 dehydrogenates and generates hydrogen by applying the heat of the heat medium w1 discharged from the steam turbine 121 to the organic compound.

More specifically, the dehydrogenation apparatus 130 produces hydrogen by dehydrogenating the hydrogenated organic compound using the organic chemical hydride method. Here, the organic chemical hydride method is a method in which an aromatic compound is hydrogenated to store hydrogen as a hydrogenated aromatic compound, transported to a place of use, and dehydrogenated from the hydrogenated aromatic compound at the place of use. It is a method of extracting hydrogen, and can safely store and transport hydrogen.

In the present embodiment, the dehydrogenation apparatus 130 produces toluene and hydrogen by applying heat to MCH (methylcyclohexane), which is an organic compound, to cause a dehydrogenation reaction. Here, MCH can be produced by carrying out a hydrogenation reaction with toluene. Further, the required amount of MCH is previously received and stored in the MCH tank 131.

Specifically, the dehydrogenation device 130 receives the MCH from the MCH tank 131 through a pipe. Then, the dehydrogenation device 130 generates toluene and hydrogen by applying thermal energy to the received MCH to cause a dehydrogenation reaction. Here, the temperature at which the dehydrogenation apparatus 130 can efficiently generate hydrogen from the MCH is, for example, 300 ° C. (catalyst activation temperature when the conversion rate is 90%). Therefore, the dehydrogenation apparatus 130 can efficiently generate hydrogen by applying the heat of the heat medium w1 (steam) discharged from the steam turbine 121, for example, about 380 ° C., to the MCH.

Then, the dehydrogenation apparatus 130 stores the generated hydrogen in the hydrogen tank 132 and stores the generated toluene in the toluene tank 133. Further, the toluene stored in the toluene tank 133 is appropriately carried out and appropriately treated.

Further, the dehydrogenation device 130 supplies the generated hydrogen to the second power generation facility 300. Here, the hydrogen produced by the dehydrogenation apparatus 130 is hydrogen at normal temperature and pressure. That is, the dehydrogenation device 130 supplies hydrogen at normal temperature and pressure to the boiler or the like of the second power generation facility 300. The normal temperature means a pressure of about 10 to 20 ° C., and the normal pressure means a pressure of about 0.1 to 0.3 MPa. Further, the dehydrogenation device 130 sends the generated hydrogen to the above-mentioned compressor 123, generates compressed hydrogen, stores it in the compressed hydrogen tank 134, and supplies it to the gas turbine or the like of the second power generation facility 300.

In the generator 122, hydrogen as a refrigerant is sealed in the generator because a large current flows through the field and the stator during power generation and the temperature becomes high. Therefore, the dehydrogenation device 130 can also supply the generated hydrogen to the generator 122 and utilize it as hydrogen for cooling the generator 122. Alternatively, the dehydrogenation device 130 can also supply the generated hydrogen as hydrogen for cooling the generator of the second power generation facility 300.

The binary power generation facility 140 is a power generation facility in which the heat medium w1 discharged from the dehydrogenation device 130 is supplied to generate power. The binary power generation facility 140 is a power generation facility of a type in which a medium having a low boiling point is heated by using medium-high temperature hot water or steam having a relatively low temperature and pressure as a heat source, and the medium is evaporated to rotate a turbine to generate power. .. The electric power generated by the binary power generation facility 140 can be used for the internal electric power of the power generation system 1 or the like, or can be transmitted to the outside.

Since the temperature of the heat medium w1 discharged from the dehydrogenating device 130 is about 300 ° C., the dehydrogenating device 130 and the binary power generation are used to adjust the temperature of the heat medium w1 supplied to the binary power generation facility 140. A heat exchanger such as a water supply heater may be provided between the facility 140 and the facility 140.

Then, the heat medium w1 exiting the binary power generation facility 140 merges with the heat medium w2 discharged from the steam turbine 121, and is returned to the heat exchanger 120 by the pump 124. In this way, the heat medium w circulates through the heat exchanger 120, the steam turbine 121, the dehydrogenation device 130, and the binary power generation facility 140 to transfer heat.

Next, the configuration of the control device 20 included in the power generation system 1 and the processing performed by the control device 20 will be described in detail.

FIG. 3 is a block diagram showing a functional configuration of the control device 20 according to the embodiment of the present invention. Further, FIG. 4 is a flowchart showing a process performed by the control device 20 according to the embodiment of the present invention.

First, as shown in FIG. 3, the control device 20 is a device that controls the equipment included in the power generation unit 10, and specifically, the heating control unit 21, the dehydrogenation control unit 22, the power generation control unit 23, and the storage. A unit 24 is provided.

The heating control unit 21 controls the heater 110 and uses electric power to heat the molten salt y. That is, the heating control unit 21 controls the amount of power received from the first power generation facility 200, the flow rate of the molten salt y, and the like to adjust the temperature of the molten salt y stored in the high temperature tank 111 to a constant level and to keep the temperature of the molten salt y constant. The temperature of the molten salt y stored in 112 is adjusted to be higher than the melting point.

The dehydrogenation control unit 22 controls the heat exchanger 120, the steam turbine 121, the dehydrogenation device 130, etc., and generates hydrogen by dehydrogenating the organic compound using the heat of the heated molten salt y. To do. That is, the dehydrogenation control unit 22 adjusts the amount of the heat medium w1 extracted from the steam turbine 121, the amount of MCH received by the dehydrogenation device 130 from the MCH tank 131, and the like, and the amount, temperature, or pressure of hydrogen generated. And so on. The dehydrogenation control unit 22 also adjusts the amount of hydrogen supplied to the second power generation facility 300.

The power generation control unit 23 controls the power generation by the power generation unit 10. Specifically, the power generation control unit 23 controls various devices in the first power generation facility 200 and the second power generation facility 300 included in the power generation unit 10 to generate power. The power generation control unit 23 also performs various controls related to power generation of the generator 122 and the binary power generation facility 140.

The storage unit 24 is a memory that stores data necessary for processing performed by each processing unit included in the control device 20. The storage unit 24 has, for example, a set temperature of the molten salt y at the inlet / outlet of the heater 110, a set temperature of the heat medium w at the inlet / outlet of the heat exchanger 120, and an upper limit of the amount of the heat medium w1 extracted from the steam turbine 121. The lower limit or target value, the upper limit of the amount of MCH received from the MCH tank 131 by the dehydrogenation control unit 22, the lower limit or the target value, and the like are stored.

In this way, in the control device 20, the heating control unit 21 heats the molten salt y using electric power (S102 in FIG. 4: heating step). Then, the dehydrogenation control unit 22 generates hydrogen by dehydrogenating the organic compound using the heat of the heated molten salt y (S104 in FIG. 4: dehydrogenation step). Further, the power generation control unit 23 controls the power generation by the power generation unit 10 (S106 in FIG. 4: power generation control step).

As described above, according to the hydrogen production facility 100 according to the embodiment of the present invention, the heater 110 that heats the molten salt y using electric power and the heat of the heated molten salt y are used to generate hydrogen. It is provided with a dehydrogenation device 130 to generate. As a result, even if heat is not generated during power generation, the heat of the molten salt y can be used as a heat source for generating hydrogen by heating the molten salt y with the generated electric power. For example, if the amount of solar power generation, wind power generation, etc. introduced increases in the future, surplus power may be generated, but by heating the molten salt y with this surplus power, the surplus power can be effectively utilized. Can be done. Further, since the molten salt y can store a relatively large amount of heat, the surplus electric power can be converted into the amount of heat of the molten salt y and stored. As described above, according to the hydrogen production facility 100, hydrogen can be produced without using the heat generated during power generation as a heat source.

Further, by using a molten salt for energy storage, it is possible to store a large amount of energy with a cheaper and simpler configuration than using a storage battery.

Further, the hydrogen production facility 100 includes a heat exchanger 120 that heats the heat medium w by heat exchange between the molten salt y and the heat medium w, and the dehydrogenation device 130 converts the heat of the heat medium w into an organic compound. Addition produces hydrogen. As a result, even when the temperature of the molten salt y is high and the temperature is not suitable for producing hydrogen, heat at an optimum temperature for producing hydrogen is added to the organic compound via the heat medium w. be able to.

Further, the hydrogen production facility 100 includes a steam turbine 121 to which the heat medium w is supplied, and the dehydrogenation device 130 generates hydrogen by applying the heat of the heat medium w1 generated from the steam turbine 121 to the organic compound. To do. As a result, even when the temperature of the molten salt y is high, the temperature of the heat medium w can be lowered by driving the steam turbine 121 on the heat medium w, and heat at an optimum temperature can be added to the organic compound.

Further, since the hydrogen production facility 100 includes a generator 122 coaxial with the steam turbine 121, the heat medium w can drive the steam turbine 121 to generate electricity.

Further, since the hydrogen production facility 100 includes a compressor 123 coaxial with the steam turbine 121, the heat medium w drives the steam turbine 121, so that the compressor 123 compresses hydrogen to generate compressed hydrogen. be able to.

Further, the hydrogen production facility 100 includes a binary power generation facility 140 to which the heat medium w1 emitted from the dehydrogenation device 130 is supplied. That is, by using the heat of the heat medium w1 for the generation of hydrogen and then using the remaining heat for binary power generation, the heat of the heat medium w1 can be effectively utilized.

Further, in the hydrogen production facility 100, the dehydrogenation apparatus 130 can generate hydrogen by a simple method of generating hydrogen by using an organic chemical hydride method.

Further, in the hydrogen production facility 100, the heater 110 heats the molten salt y by using the surplus electric power of the electric power generated by the renewable energy in the first power generation facility 200, thereby effectively utilizing the surplus electric power. Can be done. Further, by heating the molten salt y using the electric power generated by the renewable energy, it is possible to reduce the amount of carbon dioxide emitted in the process of generating hydrogen.

Further, in the hydrogen production facility 100, the dehydrogenation device 130 supplies the generated hydrogen to the second power generation facility 300, which is a thermal power generation facility, so that the emission amount of carbon dioxide in the thermal power generation facility can be reduced.

Further, the present invention can be realized not only as such a hydrogen production facility 100 but also as a power generation system 1. That is, the power generation system 1 includes a hydrogen production facility 100 and a first power generation facility 200 that generates electric power using renewable energy, and the heater 110 of the hydrogen production facility 100 is the electric power generated by the first power generation facility 200. The molten salt y is heated using the surplus electric power. Further, the power generation system 1 includes a hydrogen production facility 100 and a second power generation facility 300, which is a thermal power generation facility that co-fires hydrogen produced by the hydrogen production facility 100 and fossil fuel.

The present invention can also be realized as a hydrogen production method. That is, the hydrogen production method includes a heating step of heating the molten salt y using electric power and a dehydrogenation step of producing hydrogen by dehydrogenating an organic compound using the heat of the heated molten salt y. And include. Further, the present invention can also be realized as a control device 20 that performs each step of such a hydrogen production method. Further, the present invention can also be realized as an integrated circuit including a characteristic processing unit included in the control device 20. Further, the present invention is realized as a program for causing a computer to execute a characteristic process included in the hydrogen production method, or a computer-readable CD-ROM (Compact Disc-Read Only Memory) in which the program is recorded. It can also be realized as a non-temporary recording medium. Then, such a program can be distributed via a recording medium such as a CD-ROM and a transmission medium such as the Internet.

(Modification example 1)
Next, a modification 1 of the above embodiment will be described. In the above embodiment, the heater 110 uses electric power to heat the molten salt y. However, in this modification, the heater uses renewable energy to heat the molten salt y. FIG. 5 is a schematic view showing the configuration of the power generation unit 11 having the hydrogen production facility 101 according to the first modification of the embodiment of the present invention.

As shown in FIG. 5, the power generation unit 11 in this modification does not include the first power generation facility 200 of the power generation unit 10 in the above embodiment. Further, the hydrogen production facility 101 in this modification has a heater 110a instead of the heater 110 of the hydrogen production facility 100 in the above embodiment. Since the other configurations of this modification are the same as those of the above-described embodiment, detailed description thereof will be omitted.

Here, the heater 110a heats the molten salt y using renewable energy without receiving electric power from the outside. For example, as the heater 110a, there is a heating element which has a wind turbine used in wind power generation and converts the rotational motion of the wind turbine into heat to heat the molten salt y. Alternatively, the heater 110a may be a device that collects the heat of sunlight and heats the molten salt y with the heat. Further, the dehydrogenation apparatus 130 generates hydrogen by dehydrogenating the organic compound by using the heat of the heated molten salt y, as in the above embodiment.

As described above, according to the hydrogen production facility 101 according to the present modification, hydrogen is generated by using the heater 110a that heats the molten salt y using renewable energy and the heat of the heated molten salt y. The dehydrogenation device 130 is provided. In other words, if the amount of power generated by renewable energy such as solar power generation and wind power generation increases in the future, surplus power may be generated, but the molten salt y is generated by using the renewable energy for the surplus power. By heating, it is possible to effectively utilize renewable energy and suppress the generation of surplus electricity. For example, the heat of sunlight can be collected to heat the molten salt y, or the rotational motion of the wind turbine can be converted into heat to heat the molten salt y. Further, since the molten salt y can store a relatively large amount of heat, the renewable energy can be converted into the amount of heat of the molten salt y and stored. As described above, according to the hydrogen production facility 101, hydrogen can be produced without using the heat generated during power generation as a heat source.

(Modification 2)
Next, a modification 2 of the above embodiment will be described. In the above embodiment, the hydrogen production facility 100 includes a heat exchanger 120, a steam turbine 121, a generator 122, a compressor 123, a binary power generation facility 140, and the like between the heater 110 and the dehydrogenation device 130. I decided to be there. However, in this modification, the hydrogen production facility does not include the heat exchanger 120, the steam turbine 121, the generator 122, the compressor 123, the binary power generation facility 140, and the like. FIG. 6 is a schematic view showing the configuration of the power generation unit 12 having the hydrogen production facility 102 according to the second modification of the embodiment of the present invention.

As shown in FIG. 6, the power generation unit 12 in this modified example includes a hydrogen production facility 102 instead of the hydrogen production facility 100 in the above embodiment. Then, in the hydrogen production facility 102, the molten salt y heated by the heater 110 is supplied to the dehydrogenation device 130 to generate hydrogen. That is, the hydrogen production facility 102 in this modification is the heat exchanger 120, the steam turbine 121, and the generator, which the hydrogen production facility 100 of the above embodiment has between the heater 110 and the dehydrogenizer 130. It is not equipped with 122, a compressor 123, a binary power generation facility 140, or the like. Since the other configurations of this modification are the same as those of the above-described embodiment, detailed description thereof will be omitted.

As described above, the hydrogen production facility 102 in the present modification uses the heater 110 that heats the molten salt y using electric power and the heat of the heated molten salt y to dehydrogenate the organic compound. It is equipped with a dehydrogenation device 130 that generates hydrogen in the water.

As described above, according to the hydrogen production facility 102 according to the present modification, hydrogen is produced without using the heat generated during power generation as a heat source, as in the above embodiment, while simplifying the facility configuration. Can produce effects such as being able to. In particular, when the temperature of the molten salt y can be heated only to about 300 ° C. in the heater 110, it is suitable to directly supply the molten salt y to the dehydrogenation apparatus 130.

Although the hydrogen production equipment and the like according to the embodiment of the present invention and the modified example thereof have been described above, the present invention is not limited to the above-described embodiment and the modified example thereof. That is, it should be considered that the embodiments disclosed this time and examples thereof are examples in all respects and are not restrictive. The scope of the present invention is shown not by the above description but by the scope of claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

For example, in the above embodiment and the second modification, the power generation system 1 has a first power generation facility 200 and a second power generation facility 300. However, the power generation system 1 may not have at least one of the first power generation facility 200 and the second power generation facility 300. For example, the power generation system 1 does not have the first power generation facility 200, and the heater 110 may receive power from a commercial power system. Further, the power generation system 1 does not have the second power generation facility 300, and the hydrogen generated by the dehydrogenation device 130 may be supplied to or sold to another power plant. In particular, since compressed hydrogen is suitable for transportation, it can be sold as a fuel for fuel cell vehicles.

Further, in the above embodiment and the first modification, the hydrogen production facility 100 or 101 includes a steam turbine 121, a generator 122 coaxial with the steam turbine 121, and a compressor 123 coaxial with the steam turbine 121. I decided. However, the generator 122 does not have to be coaxial with the steam turbine 121, and the compressor 123 does not have to be coaxial with the steam turbine 121. Further, the hydrogen production facility 100 or 101 may not have the generator 122 or the compressor 123. Further, the hydrogen production facility 100 or 101 does not have to have the steam turbine 121.

Further, in the above embodiment and the first modification, the hydrogen production facility 100 or 101 is provided with the binary power generation facility 140. However, the hydrogen production facility 100 or 101 does not include the binary power generation facility 140, and the heat medium emitted from the dehydrogenation device 130 may be returned to the heat exchanger 120. As a result, it is possible to suppress a decrease in the temperature of the heat medium and suppress a decrease in the temperature of the molten salt, so that the amount of energy used for the heater 110 or 110a can be reduced.

Further, in the above-described embodiment and its modification, the dehydrogenation apparatus 130 is determined to generate hydrogen by dehydrogenating from the hydrogenated organic compound (MCH) by using the organic chemical hydride method. However, the organic compound used in the dehydrogenation apparatus 130 is not limited to MCH as long as it can generate hydrogen by applying heat, and any organic compound may be used. Further, as long as it is a method capable of generating hydrogen by applying heat, the method is not limited to the organic chemical hydride method, and any method may be used.

Further, in the above embodiment and the second modification, the heater 110 uses the surplus electric power of the electric power generated by the renewable energy in the first power generation facility 200 to heat the molten salt. However, the electric power supplied to the heater 110 does not have to be surplus electric power. If the electric power is derived from renewable energy, it is possible to reduce carbon dioxide emissions in the process of producing hydrogen. Alternatively, the heater 110 may heat the molten salt by using the surplus electric power of the electric power generated by the energy other than the renewable energy. That is, the first power generation facility 200 may be a power generation facility that generates power using energy other than renewable energy.

Further, in the above-described embodiment and its modification, the second power generation facility 300 is a thermal power generation facility that co-fires hydrogen and fossil fuel. However, the second power generation facility 300 may be a thermal power generation facility that exclusively burns hydrogen, or may be a power generation facility such as a fuel cell that uses hydrogen as fuel.

In addition, a form constructed by arbitrarily combining the above-described embodiment and the above-mentioned modification is also included in the scope of the present invention. For example, the configuration may be a combination of the above-mentioned modification 1 and modification 2.

The present invention can be applied to hydrogen production equipment and the like capable of producing hydrogen without using the heat generated during power generation as a heat source.

1 Power generation system 10, 11, 12 Power generation unit 20 Control device 21 Heating control unit 22 Dehydrogenation control unit 23 Power generation control unit 24 Storage unit 100, 101, 102 Hydrogen production equipment 110, 110a Heater 111 High temperature tank 112 Low temperature tank 113, 114, 124 Pump 120 Heat exchanger 121 Steam turbine 122 Generator 123 Compressor 130 Dehydrogenizer 131 MCH tank 132 Hydrogen tank 133 Toluene tank 134 Compressed hydrogen tank 140 Binary power generation equipment 200 First power generation equipment 300 Second power generation equipment

Claims (11)

A hydrogen production facility that produces hydrogen
A heater that heats the molten salt using the electric power generated by the power generation facility without using the heat generated during power generation by the power generation facility .
A hydrogen production facility including a dehydrogenation device that produces hydrogen by dehydrogenating an organic compound using the heat of the heated molten salt. Further, a heat exchanger for exchanging heat between the heated molten salt and the heat medium to heat the heat medium is provided.
The hydrogen production facility according to claim 1, wherein the dehydrogenation apparatus performs dehydrogenation by applying the heat of the heated heat medium to the organic compound to generate hydrogen. Further, a steam turbine to which the heated heat medium is supplied is provided.
The hydrogen production facility according to claim 2, wherein the dehydrogenation apparatus performs dehydrogenation by applying the heat of the heat medium discharged from the steam turbine to the organic compound to generate hydrogen. The hydrogen production facility according to claim 3, further comprising a generator coaxial with the steam turbine. Further, a compressor coaxial with the steam turbine is provided.
The hydrogen production facility according to claim 3 or 4, wherein the compressor compresses hydrogen generated by the dehydrogenation apparatus to generate compressed hydrogen. The hydrogen production facility according to any one of claims 2 to 5, further comprising a binary power generation facility to which the heat medium discharged from the dehydrogenation device is supplied. The hydrogen production facility according to any one of claims 1 to 6, wherein the heater uses surplus electric power generated by renewable energy to heat the molten salt. The hydrogen production facility according to any one of claims 1 to 7, wherein the dehydrogenation device supplies the generated hydrogen to a thermal power generation facility. The hydrogen production facility according to any one of claims 1 to 8.
And a the power generation facility that generates electricity by renewable energy,
The heater included in the hydrogen production facility is a power generation system that heats the molten salt by using surplus electric power among the electric power generated by the power generation facility. The hydrogen production facility according to any one of claims 1 to 8 .
A power generation system equipped with a thermal power generation facility that co-fires hydrogen produced in the hydrogen production facility and fossil fuel. It is a hydrogen production method that produces hydrogen.
A heating process in which the molten salt is heated using the electric power generated by the power generation facility without using the heat generated by the power generation facility during power generation .
A hydrogen production method including a dehydrogenation step of producing hydrogen by dehydrogenating an organic compound using the heat of a heated molten salt.

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