Nuclear energy hydrogen production system and control method

Abstract

The invention discloses a nuclear energy hydrogen production system and a control method, and relates to the technical field of nuclear energy application, the nuclear energy hydrogen production system comprises a reactor, a cooling loop, a power generation loop, a hydrogen production branch and a hydrogen production loop, and the control method comprises the steps that the hydrogen demand is set; acquiring specific parameters of the sensing device at fixed time intervals; and according to the obtained specific parameters of the induction device and the set hydrogen demand quantity, the distribution proportion of the liquid flow in the hydrogen production branch and the liquid flow in the hydrogen production loop and the heating preset temperature of the electric heating device are adjusted. The technical problems that in the prior art, the temperature requirement of the inlet end of a solid oxide electrolysis hydrogen production device is high, and the input end of a hydrogen production device in nuclear energy hydrogen production is unstable are solved, and the nuclear energy hydrogen production system and the control method are stable, efficient and high in utilization rate.

Description

Technical Field

[0001] The present invention relates to the technical field of nuclear energy utilization, and particularly to a nuclear energy hydrogen production system and a control method. Background Art

[0002] Hydrogen energy is a clean energy source with advantages such as rich resources, zero pollution during combustion, and high calorific value. It has emerged in the national economy applications such as batteries, transportation, and aerospace, and is an important part of the future energy system.

[0003] Hydrogen energy is a secondary energy source that requires the consumption of primary energy to obtain. According to the hydrogen production source and carbon emission situation, hydrogen production is divided into gray hydrogen, blue hydrogen, and green hydrogen. Currently, 96% of the world's hydrogen production comes from fossil energy hydrogen production. Fossil energy hydrogen production technology is mature but unsustainable and will emit a large amount of greenhouse gases.

[0004] Nuclear energy can not only provide the electricity required for large-scale hydrogen production, but also provide the heat energy required for hydrogen production. Patent CN118272200A, a nuclear energy heating hydrogen production system coupling waste incineration power generation and anaerobic fermentation, uses the methane steam reforming method to produce hydrogen, which will produce carbon dioxide and cannot achieve zero carbon emissions.

[0005] CH4 + 2H2O = 4H2 + CO2

[0006] Methane steam reforming reaction formula

[0007] Refer to Figure 3 , Patent CN116334329A, a comprehensive cycle system coupling nuclear power generation and heating with a hydrogen-rich blast furnace-converter, and Patent CN112562879B, an energy cascade utilization multi-energy supply system based on nuclear energy, use the iodine-sulfur cycle method to produce hydrogen, which has disadvantages such as many steps, complex processes, low hydrogen production efficiency, and high requirements for strong acid resistance of equipment.

[0008] Solid oxide electrolysis hydrogen production (i.e., high-temperature steam hydrogen production) has the advantages of zero carbon emissions, no pollution, simple process, and high hydrogen production efficiency. However, solid oxide electrolysis hydrogen production has extremely high requirements for the temperature at the inlet end, generally at 600°C - 1000°C. How to stably, with low energy consumption, and without pollution provide a high-temperature environment for solid oxide electrolysis hydrogen production is the biggest difficulty faced by the current implementation of the solid oxide electrolysis hydrogen production method. Summary of the Invention

[0009] The purpose of the present invention is to solve the technical problems in the prior art that the temperature requirement at the inlet end of the solid oxide electrolysis hydrogen production device is high and the input end of the hydrogen production device in nuclear energy hydrogen production is unstable. The present invention provides the following technical solutions:

[0010] A nuclear energy hydrogen production system, comprising:

[0011] Reactor

[0012] Cooling circuit, connected to the reactor, for cooling the reactor;

[0013] Power generation circuit, which exchanges heat with the cooling circuit at the steam generator. A steam turbine generator is connected to the power generation circuit and it flows through a cooling device;

[0014] Hydrogen production branch, which is connected to the power generation circuit in parallel. The input end of the hydrogen production branch is arranged between the steam generator and the steam turbine generator, and the output end is arranged between the steam turbine generator and the cooling device;

[0015] Hydrogen production circuit, on which a heat exchanger, an electric heating device and a hydrogen production device are installed in sequence along the fluid flow direction. At the heat exchanger, the hydrogen production circuit exchanges heat with the hydrogen production branch.

[0016] A water supply device is also installed on the hydrogen production circuit. The input end of the water supply device is connected to the output end of the water supply system, and the heat exchanger is arranged between the water supply device and the electric heating device.

[0017] The power output end of the steam turbine generator is connected to the electric heating device and the hydrogen production device for supplying power to the electric heating device and the hydrogen production device.

[0018] On the hydrogen production branch, induction devices are provided at the output end of the steam generator, between the heat exchanger and the electric heating device, and at the output end of the electric heating device.

[0019] On the hydrogen production branch, a first control valve is provided in front of the input end of the heat exchanger; a second control valve is provided on the hydrogen production circuit.

[0020] In the above solution, nuclear energy is used to provide heat energy for the hydrogen production device, making full use of the advantages of nuclear energy being pollution-free and releasing high-temperature heat, providing most of the heat requirements for the hydrogen production device, saving energy and not causing environmental pollution. By adding an electric heating device, on the one hand, when the heat temperature of the nuclear reactor is insufficient, the heat of the hydrogen production circuit is supplemented, and on the other hand, it is beneficial to stabilize the temperature balance in the hydrogen production circuit; furthermore, the main power source of the electric heating device comes from the steam turbine that generates electricity through the nuclear energy system, realizing the efficient utilization of the overall energy.

[0021] A control method applied to a nuclear energy hydrogen production system, including:

[0022] Setting the hydrogen demand;

[0023] Obtaining the specific parameters of the induction device at fixed intervals;

[0024] Adjust the distribution ratio of the liquid flow rate in the hydrogen production branch and the liquid flow rate in the hydrogen production loop, as well as the preset heating temperature of the electric heating device, according to the specific parameters of the induction device obtained and the set hydrogen demand.

[0025] In the above solution, the control method provided by the present invention periodically monitors the specific parameters of the induction device every fixed time interval. Then, according to the specific parameters monitored by the induction device, the distribution ratio of the liquid flow rate in the hydrogen production branch and the liquid flow rate in the hydrogen production loop is dynamically adjusted, and at the same time, the heating temperature of the electric heating device is adjusted, so that the entire system is in dynamic balance, overcoming the technical problem of unstable temperature in the hydrogen production loop caused by using nuclear energy for heat supply and power generation. At the same time, by transmitting the specific parameters of the induction device to the control system in real time, the control system can match the best distribution ratio of the liquid flow rate in the hydrogen production branch and the liquid flow rate in the hydrogen production loop, and the secondary heating power parameters of the electric heating device according to the demand of hydrogen gas consumption. And by remotely controlling the size of the switch, the operation parameters of the nuclear hydrogen production system can be automatically adjusted to make the system reach the best operation state and the highest operation efficiency, realizing the full utilization of nuclear energy.

[0026] Obtain the specific parameters of the induction device, specifically including: obtaining the temperature parameters and flow rate parameters of each node detected by each induction device.

[0027] Adjust the distribution ratio of the liquid flow rate in the hydrogen production branch and the liquid flow rate in the hydrogen production loop, as well as the preset heating temperature of the electric heating device, according to the specific parameters of the induction device obtained and the set hydrogen demand, specifically including:

[0028] According to the set hydrogen demand, obtain the electric energy and heat energy required for the hydrogen production device to produce the set hydrogen demand.

[0029] According to the heat energy required for the hydrogen production device to produce the set hydrogen demand, obtain the target temperature parameter and target flow rate parameter at the output end of the electric heating device.

[0030] Set the heating temperature of the electric heating device to the obtained target temperature parameter at the output end of the heating device.

[0031] Set the flow rate of the hydrogen production loop to the obtained target flow rate parameter required at the output end of the electric heating device.

[0032] According to the target temperature parameter at the output end of the electric heating device, combined with the flow rate parameter and temperature parameter detected by the induction device at the output end of the steam generator, adjust the distribution ratio of the liquid flow rate in the hydrogen production branch and the liquid flow rate in the hydrogen production loop.

[0033] Adjust the heating power of the electric heating device according to the temperature parameter detected by the induction device arranged between the heat exchanger and the electric heating device, so that the temperature at the output end of the electric heating device reaches the target temperature parameter at the output end of the electric heating device.

[0034] In the above solution, a specific control method for adjusting relevant data according to the specific parameters monitored by the induction device is disclosed, realizing the dynamic regulation of the nuclear energy hydrogen production system, enabling the nuclear energy hydrogen production system to reach the best operating state and the highest operating efficiency; dynamically regulating the nuclear energy hydrogen production system is also conducive to maximizing the effective utilization of nuclear energy, maintaining the stability of the hydrogen production efficiency of the hydrogen production device, and also conducive to realizing efficient and stable hydrogen production.

[0035] The obtaining of the specific parameters of the induction device further includes: obtaining any one or several of the fluid pressure parameter, flow rate parameter, voltage parameter, and current parameter monitored by the induction device.

[0036] In the above solution, the monitoring of other parameters by the induction device can provide real-time feedback on the situation within the entire nuclear energy hydrogen production system, so as to realize the evaluation of the overall working operation and safety situation of the entire hydrogen production system, timely avoid the occurrence of some unexpected situations, and is conducive to maintaining the safety and stability of the entire nuclear energy hydrogen production system.

[0037] Preferably, when the temperature parameter monitored by the induction device at the output end of the steam generator is (550 - 750) °C, (80% - 98%) of the steam flow rate in the power generation loop is used for power generation by the steam turbine generator, and the remaining steam flow rate is diverted to the hydrogen production branch for heat exchange with the hydrogen production loop to raise the temperature of the hydrogen production loop. Brief Description of the Drawings

[0038] Figure 1 It is a schematic structural diagram of the nuclear energy hydrogen production system of the invention;

[0039] Figure 2 It is a flow chart of the control method of the present invention;

[0040] Figure 3 It is a schematic diagram of an iodine-sulfur cycle hydrogen production in the prior art.

[0041] In the figure: 1. Reactor, 2. Cooling loop, 3. Power generation loop, 4. Hydrogen production branch, 5. Hydrogen production loop, 6. Steam generator, 7. Steam turbine generator, 8. Cooling device, 9. Heat exchanger, 10. Electric heating device, 11. Hydrogen production device, 12. Water supply device, 13. Induction device, 14. First control valve, 15. Second control valve. Detailed Embodiments

[0042] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0043] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0044] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments can be combined with each other.

[0045] It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0046] Refer to Figure 1 : A nuclear hydrogen production system, comprising:

[0047] A reactor 1 for performing nuclear reactions, and the nuclear reactions release heat. The reactor 1 is a high-temperature reactor 1, and a high-temperature gas-cooled reactor or a liquid metal reactor is optional.

[0048] A cooling circuit 2 connected to the reactor 1 for cooling and reducing the temperature of the reactor 1; the outlet temperature of the cooling circuit 2 flowing through the reactor 1 is ≥ 600 °C.

[0049] A power generation circuit 3 that exchanges heat with the cooling circuit 2 at a steam generator 6. A steam turbine generator 7 is connected to the power generation circuit 3, and the power generation circuit 3 flows through a cooling device 8; the cooling liquid in the power generation circuit 3 is water, and the cooling device 8 is a cooling tower or a condenser.

[0050] Hydrogen production branch 4, the hydrogen production branch 4 is connected to the power generation loop 3 in parallel. The input end of the hydrogen production branch 4 is arranged between the steam generator 6 and the steam turbine generator 7, and the output end is arranged between the steam turbine generator 7 and the cooling device 8; the cooling liquid in the hydrogen production branch 4 is the same as that in the power generation loop 3, both are water.

[0051] Hydrogen production loop 5, on the hydrogen production loop 5, a heat exchanger 9, an electric heating device 10 and a hydrogen production device 11 are successively installed along the fluid flow direction. At the heat exchanger 9, the hydrogen production loop 5 exchanges heat with the hydrogen production branch 4. A water supply device 12 is also installed on the hydrogen production loop 5. The input end of the water supply device 12 is connected to the output end of the water supply system. The heat exchanger 9 is arranged between the water supply device 12 and the electric heating device 10. Among them, the hydrogen production device 11 is a solid oxide electrolysis hydrogen production device 11 or a thermochemical hydrogen production device 11. The fluid in the hydrogen production loop 5 is water. The electric heating device 10 is used to heat the hydrogen production loop 5 for the second time, and the hydrogen production device 11 is used to produce hydrogen.

[0052] The power output end of the steam turbine generator 7 is connected to the electric heating device 10 and the hydrogen production device 11, and is used to supply power to the electric heating device 10 and the hydrogen production device 11. Further, the power output end of the steam turbine generator 7 is connected to the input end of the energy storage device, and the output end of the energy storage device is connected to the electric heating device 10 and the hydrogen production device 11, and is used to supply power to the electric heating device 10 and the hydrogen production device 11. The energy storage device is also connected to the power supply system. When the electric quantity provided by the reactor 1 is not enough to support the electric quantity requirements of the electric heating device 10 and the hydrogen production device 11, the power supply system can be used to supplement the power supply.

[0053] On the hydrogen production branch 4, induction devices 13 are provided at the output end of the steam generator 6, between the heat exchanger 9 and the electric heating device 10, and at the output end of the electric heating device 10. Further, induction devices 13 are also installed at the input end and output end of the steam generator 6, the input end and output end of the steam turbine generator 7, and the input end and output end of the water supply device. The induction device 13 can detect specific parameters such as temperature, fluid pressure, fluid velocity, fluid flow rate, voltage, and current.

[0054] On the hydrogen production branch 4, a first control valve 14 is provided in front of the input end of the heat exchanger 9; a second control valve 15 is provided on the hydrogen production loop 5. Further, circulation pumps are installed on the cooling loop 2, the power generation loop 3 and the hydrogen production loop 5.

[0055] All the induction devices 13, the first control valve 14, the second control valve 15, the circulation pumps, the hydrogen production device 11, the electric heating device 10, the water supply device, the steam turbine generator 7, the power supply system, the steam generator 6, and the heat exchanger 9 are connected to the control system for realizing automatic control.

[0056] In the above solution, nuclear energy is used to provide heat energy for the hydrogen production device 11, making full use of the advantages of nuclear energy being pollution-free and releasing high-temperature heat, providing most of the heat demand for the hydrogen production device 11, saving energy and causing no environmental pollution. By adding an electric heating device 10, on the one hand, when the heat temperature of the nuclear reactor 1 is insufficient, the heat of the hydrogen production loop 5 is supplemented; on the other hand, it is beneficial to stabilize the temperature balance in the hydrogen production loop 5. Further, the main power source of the electric heating device 10 comes from the steam turbine that generates electricity through the nuclear energy system, achieving the efficient utilization of the overall energy.

[0057] The working principle of a nuclear energy hydrogen production system provided by the present invention is as follows:

[0058] A nuclear reaction occurs in the reactor 1, releasing heat. The cooling liquid in the cooling loop 2 flows through the reactor 1 and undergoes heat exchange with the reactor 1, causing the cooling liquid in the cooling loop 2 to increase in temperature. When the high-temperature cooling liquid in the cooling loop 2 flows through the steam generator 6, it undergoes heat exchange with the power generation loop 3. The cooling liquid (usually water) in the power generation loop 3 is heated and vaporized into high-temperature steam, while the cooling liquid in the cooling loop 2 cools down and continues to circulate to the reactor 1 for heat exchange and repetition. A part of the high-temperature steam in the power generation loop 3 is transmitted along the pipeline of the power generation loop 3 to the steam turbine generator 7, and the rotation of the steam turbine drives the generator to generate electricity. Another part of the steam is transmitted along the hydrogen production branch 4 to the heat exchanger 9, where it undergoes heat exchange with the hydrogen production loop 5 to initially heat the water in the hydrogen production loop 5. The steam that has flowed through the steam turbine generator 7 and the steam that has undergone heat exchange with the hydrogen production loop 5 converge before the cooling device 8 and then enter the cooling device 8 for cooling and temperature reduction to form water, which continues to undergo heat exchange with the steam generator 6 to repeat the above cycle. A part of the electricity generated by the steam turbine generator 7 is transmitted to the electric heating device 10 to supply power to the electric heating device 10, and the water in the hydrogen production loop 5 is secondarily heated through electric heating to reach the high temperature required by the hydrogen production device 11. Another part is transmitted to the electrolysis device for electrolytic hydrogen production. In the hydrogen production loop 5, through the water supply device, the hydrogen production loop 5 obtains a water source. The water in the hydrogen production loop 5 undergoes a primary heat exchange with the hydrogen production branch 4 at the heat exchanger 9, and the water in the hydrogen production loop 5 is heated and vaporized to form water vapor. After being secondarily heated by the electric heating device 10, it reaches the target temperature required by the hydrogen production device 11 and is input into the hydrogen production device 11. After the hydrogen production device 11 electrolyzes water, hydrogen and oxygen are generated. The generated hydrogen and oxygen are dried to remove water vapor, obtaining high-purity hydrogen and oxygen. The remaining water vapor is cooled and temperature-reduced by the cooling device 8 to form water, and the water returns to the water supply device for circulation under the drive of a pump.

[0059] Refer to Figure 2 : A control method applied to a nuclear energy hydrogen production system, including:

[0060] Step S1: Set the hydrogen demand; that is, set the specific parameters of the hydrogen demand for the hydrogen production device 11.

[0061] Step S2: Obtain the specific parameters of the induction device 13 at fixed time intervals. The fixed time can be set according to requirements and experience, and can be every 5 - 10 minutes. The induction device 13 uploads the detected current specific parameters to the control system.

[0062] Step S3: Adjust the distribution ratio of the liquid flow in the hydrogen production branch 4 and the liquid flow in the hydrogen production loop 5, and the preset heating temperature of the electric heating device 10 according to the obtained specific parameters of the induction device 13 and the set hydrogen demand. Specifically, the control system adjusts the first control valve 14 according to the specific parameters monitored and fed back by the induction device 13, and then adjusts the distribution ratio of the steam flow through the hydrogen production branch 4 and the steam flow through the hydrogen production loop 5, as well as the heating power of the electric heating device 10.

[0063] In the above solution, the control method provided by the present invention periodically monitors the specific parameters of the induction device 13 at fixed time intervals, and then dynamically adjusts the distribution ratio of the liquid flow in the hydrogen production branch 4 and the liquid flow in the hydrogen production loop 5 according to the specific parameters monitored by the induction device 13, and simultaneously adjusts the heating temperature of the electric heating device 10, so that the entire system is in dynamic balance, overcoming the technical problem of unstable temperature in the hydrogen production loop 5 caused by using nuclear energy for heat supply and power generation. At the same time, by transmitting the specific parameters of the induction device 13 to the control system in real time, the control system can match the best distribution ratio of the liquid flow in the hydrogen production branch 4 and the liquid flow in the hydrogen production loop 5, and the secondary heating power parameters of the electric heating device 10 according to the demand of hydrogen gas consumption, and can adjust the operation parameters of the nuclear hydrogen production system automatically by controlling the size of the remote control switch, so that the system reaches the best operation state and the highest operation efficiency, realizing the full utilization of nuclear energy.

[0064] In step S1, the control system obtains the specific parameters fed back by the induction device 13, specifically including: obtaining the temperature parameters and flow parameters of each node detected by each induction device 13. At the same time, the induction device 13 can also monitor any one or several of the fluid pressure parameters, flow velocity parameters, voltage parameters and current parameters

[0065] In step S3, according to the obtained specific parameters of the induction device 13 and the set hydrogen demand, adjusting the distribution ratio of the liquid flow in the hydrogen production branch 4 and the liquid flow in the hydrogen production loop 5, and the preset heating temperature of the electric heating device 10 specifically includes:

[0066] Step S31: Obtain the electric energy and heat energy consumed by the hydrogen production device 11 to produce the set hydrogen demand; that is, the control system can obtain the electric energy and heat energy consumed by the hydrogen production device 11 when producing the target hydrogen demand through calculation according to the hydrogen demand set by the hydrogen production device 11 or the hydrogen demand set on the hydrogen production system. The hydrogen demand is the volume of hydrogen that the hydrogen production device 11 can produce per unit time.

[0067] Step S32: Obtain the target temperature parameter and target flow parameter at the output end of the electric heating device 10 according to the heat energy consumed by the hydrogen production device 11 to produce the set hydrogen demand; the target temperature parameter and target flow parameter at the output end of the electric heating device 10 are also the target temperature parameter and target flow parameter of the water vapor input to the hydrogen production device 11. When the water vapor input to the hydrogen production device 11 per unit time is the target temperature parameter and target flow parameter, the hydrogen production device can produce the required amount of hydrogen.

[0068] Step S33: Set the heating temperature of the electric heating device 10 to the target temperature parameter at the output end of the obtained heating device.

[0069] Step S34: Set the flow rate of the hydrogen production circuit 5 to the target flow rate parameter required at the output end of the obtained electric heating device 10; control the flow rate of the hydrogen production circuit 5 by adjusting the second control valve 15.

[0070] Step S35: Adjust the distribution ratio of the liquid flow rate in the hydrogen production branch 4 to the liquid flow rate in the hydrogen production circuit 5 according to the target temperature parameter at the output end of the electric heating device 10, combined with the flow rate parameter and temperature parameter detected by the induction device 13 at the output end of the steam generator 6; specifically, through the flow rate parameter and temperature parameter detected by the induction device 13 at the output end of the steam generator 6 monitored, and the temperature required by the hydrogen production device 11, dynamically adjust the flow rate of the steam flowing through the hydrogen production branch 4 to keep the temperature parameter at the output end of the heat exchanger as balanced as possible and avoid large fluctuations, so as to make the hydrogen production efficiency of the hydrogen production device 11 stable and efficient.

[0071] Step S36: Adjust the heating power of the electric heating device 10 according to the temperature parameter detected by the induction device 13 arranged between the heat exchanger 9 and the electric heating device 10 so that the temperature at the output end of the electric heating device 10 reaches the target temperature parameter at the output end of the electric heating device 10.

[0072] The order of Step S33 and Step S34 can be interchanged.

[0073] In the above solution, a specific control method for adjusting relevant data according to the specific parameters monitored by the sensing device 13 is disclosed, realizing the dynamic regulation of the nuclear hydrogen production system, enabling the nuclear hydrogen production system to reach the optimal operating state and the highest operating efficiency; dynamically regulating the nuclear hydrogen production system is also conducive to maximizing the effective utilization of nuclear energy and maintaining the stability of the output efficiency at the output end of the heat exchanger 9, ensuring the stability of the hydrogen production efficiency of the hydrogen production device 11, avoiding the situation of unstable hydrogen production efficiency caused by unstable temperature at the output end of the steam generator 6, and also facilitating high-efficiency and precise hydrogen production.

[0074] The obtaining of the specific parameters of the sensing device 13 further includes: obtaining any one or several of the fluid pressure parameter, flow rate parameter, voltage parameter, and current parameter monitored by the sensing device 13.

[0075] In the above solution, the monitoring of other parameters by the sensing device 13 can provide real-time feedback on the situation within the entire nuclear hydrogen production system, so as to realize the assessment of the overall working operation and safety of the entire hydrogen production system, timely avoid the occurrence of some unexpected situations, and is conducive to maintaining the safety and stability of the entire nuclear hydrogen production system.

[0076] In one embodiment, when the temperature parameter monitored by the sensing device located at the output end of the steam generator is (550 - 750) °C, (80% - 98%) of the steam flow in the power generation loop 3 is used for power generation by the steam turbine generator 7, and the remaining steam flow is diverted to the hydrogen production branch 4 for heat exchange with the hydrogen production loop 5 to raise the temperature of the hydrogen production loop 5.

[0077] Specific Embodiment 1: The hydrogen production device 11 uses solid oxide electrolysis for hydrogen production. The required hydrogen production demand set for the hydrogen production device 11 is 20000 m 3 / h. Given that the thermal power of the reactor 1 is adjusted to 200 MW, then, to produce 20000 m 3 / h of hydrogen, the operating temperature at the input end of the hydrogen production device 11 needs to be 750 °C. By adjusting the valve size of the first control valve 14, among all the steam flows generated by the steam generator 6 in the power generation loop 3, 96.7% of the steam flow is provided to the power generation loop 3 for power generation by the steam turbine generator 7, and 3.3% of the steam flow is provided to the hydrogen production branch 4 for heat exchange with the heat exchanger 9 to raise the temperature inside the hydrogen production loop 5.

[0078] Specific Embodiment 2: The hydrogen production device 11 uses solid oxide electrolysis for hydrogen production. The required hydrogen production demand set for the hydrogen production device 11 is 21000 m 3 / h. Given that the thermal power of the reactor 1 is adjusted to 200 MW, then, to produce 21000 m 3For hydrogen at / h, the operating temperature at the input end of the hydrogen production device 11 needs to be 850 °C. By adjusting the valve size of the first control valve 14, among all the steam flow generated by the steam generator 6 in the power generation loop 3, 96.2% of the steam flow is supplied to the power generation loop 3 for power generation by the steam turbine generator 7, and 3.8% of the flow is supplied to the hydrogen production branch 4 for heat exchange with the heat exchanger 9 to increase the temperature in the hydrogen production loop 5.

[0079] As described above, it is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A nuclear energy hydrogen production system, characterized in that, Comprising: a reactor a cooling circuit, connected to the reactor, for cooling the reactor; a power generation circuit, which exchanges heat with the cooling circuit at a steam generator, and a steam turbine generator is connected to the power generation circuit and the power generation circuit flows through a cooling device; a hydrogen production branch, which is connected to the power generation circuit in parallel, the input end of the hydrogen production branch is arranged between the steam generator and the steam turbine generator, and the output end is arranged between the steam turbine generator and the cooling device; a hydrogen production circuit, on which a heat exchanger, an electric heating device and a hydrogen production device are sequentially installed along the fluid flow direction, and at the heat exchanger, the hydrogen production circuit exchanges heat with the hydrogen production branch.

2. The nuclear hydrogen production system according to claim 1, characterized in that, A water supply device is further installed on the hydrogen production circuit, the input end of the water supply device is connected to the output end of a water supply system, and the heat exchanger is arranged between the water supply device and the electric heating device.

3. A nuclear hydrogen production system as claimed in claim 1, wherein, The power output end of the steam turbine generator is connected to the electric heating device and the hydrogen production device for supplying power to the electric heating device and the hydrogen production device.

4. A nuclear hydrogen production system according to claim 1, characterized in that, On the hydrogen production branch, induction devices are provided at the output end of the steam generator, between the heat exchanger and the electric heating device, and at the output end of the electric heating device.

5. A nuclear energy hydrogen production system according to claim 4, characterized in that, On the hydrogen production branch, a first control valve is provided before the input end of the heat exchanger; a second control valve is provided on the hydrogen production circuit.

6. A control method applied to the nuclear hydrogen production system according to any one of claims 1-5, characterized in that, Comprising: setting the hydrogen demand; obtaining the specific parameters of the induction device at fixed time intervals; adjusting the distribution ratio of the liquid flow rate in the hydrogen production branch and the liquid flow rate in the hydrogen production circuit and the heating preset temperature of the electric heating device according to the obtained specific parameters of the induction device and the set hydrogen demand.

7. The control method according to claim 6, wherein Obtaining the specific parameters of the induction device specifically includes: obtaining the temperature parameters and flow parameters of each node detected by each induction device.

8. The control method according to claim 7, wherein Adjusting the distribution ratio of the liquid flow rate in the hydrogen production branch and the liquid flow rate in the hydrogen production circuit and the heating preset temperature of the electric heating device according to the obtained specific parameters of the induction device and the set hydrogen demand specifically includes: obtaining the electric energy and heat energy required for the hydrogen production device to produce the set hydrogen demand according to the set hydrogen demand; obtaining the target temperature parameter and target flow parameter at the output end of the electric heating device according to the heat energy required for the hydrogen production device to produce the set hydrogen demand; setting the heating temperature of the electric heating device to the obtained target temperature parameter at the output end of the heating device; setting the flow rate of the hydrogen production circuit to the target flow parameter required at the output end of the obtained electric heating device; adjusting the distribution ratio of the liquid flow rate in the hydrogen production branch and the liquid flow rate in the hydrogen production circuit according to the target temperature parameter at the output end of the electric heating device and combining the flow parameter and temperature parameter detected by the induction device at the output end of the steam generator; adjusting the heating power of the electric heating device according to the temperature parameter detected by the induction device arranged between the heat exchanger and the electric heating device so that the temperature at the output end of the electric heating device reaches the target temperature parameter at the output end of the electric heating device.

9. The control method according to claim 6, characterized in that The obtaining the specific parameters of the induction device further includes: obtaining any one or more of the fluid pressure parameter, flow velocity parameter, voltage parameter and current parameter monitored by the induction device.

10. The control method according to claim 8, wherein, When the temperature parameter monitored by the induction device located at the output end of the steam generator is (550 - 750) °C, (80% - 98%) of the steam flow rate in the power generation loop is used for power generation by the steam turbine generator, and the remaining steam flow rate is diverted to the hydrogen production branch.

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