Nuclear energy heat supply system and method utilizing comprehensive smart energy

Abstract

The invention provides a nuclear energy heat supply system and method utilizing comprehensive smart energy, and belongs to the technical field of nuclear energy heat supply, the nuclear energy heat supply system comprises a CAP nuclear power heat supply unit and a comprehensive smart energy heat supply network temperature adjusting subsystem, and the CAP nuclear power heat supply unit and the comprehensive smart energy heat supply network temperature adjusting subsystem are both connected with a heat supply pipeline; wherein the comprehensive smart energy heat supply network temperature adjusting subsystem comprises a new energy power generation system, an energy storage device, a power distribution network, an electric heater and a circuit switch, an electric energy outlet of the new energy power generation system is connected with an electric energy inlet of the energy storage device, and an electric energy outlet of the energy storage device is connected with the power distribution network and the electric heater through the circuit switch. The comprehensive smart energy is used for nuclear power heat supply, low-power-consumption operation of the nuclear energy heat supply unit is achieved, and the economical efficiency of the nuclear energy heat supply unit is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of nuclear energy heating, and in particular relates to a nuclear energy heating system and method utilizing integrated intelligent energy. Background Art

[0002] Integrated smart energy is a new type of regional energy system that integrates distributed gas power generation, photovoltaics, distributed wind power, heat pumps, refrigerators, energy storage and other equipment, operates close to users, improves management models with advanced information technology and intelligent technology, and organically coordinates and optimizes the distribution, conversion, storage, consumption and other links of various energy sources. It breaks the traditional model of separate planning, design and operation of different energy types, and provides regional integrated energy integration solutions, with the advantages of high comprehensive energy utilization efficiency, the ability to promote the local consumption of renewable energy and meet diverse energy needs.

[0003] CAP nuclear power heating unit is a device that uses nuclear energy to provide heat. Its core principle is to provide heat through the nuclear energy released by the chain fission reaction in the nuclear reactor, which is then used for heating. This heating method is efficient and stable and can meet large-scale heating needs.

[0004] Conventional nuclear energy cogeneration only uses the middle exhaust steam with a relatively high temperature level to carry out heat exchange in the heating network. There is a large heat exchange temperature difference between the middle exhaust steam and the heating network water. According to the second law of thermodynamics, the heat exchange temperature difference is large and the exergy loss is large, which reduces the economy of the nuclear energy heating unit.

[0005] In addition, the wind and solar resources of traditional nuclear power plants are only used for power generation and access to the grid, without considering using this green electricity for nuclear heating. The flexible adjustment capabilities of nuclear cogeneration units are relatively poor. Summary of the invention

[0006] In view of the defects or shortcomings in the prior art, the present invention provides a nuclear energy heating system and method using comprehensive intelligent energy, which uses comprehensive intelligent energy for nuclear power heating, realizes low-power operation of nuclear energy heating units, and improves the economy of nuclear energy heating units.

[0007] To achieve the above object, the present invention adopts the following technical solution: In a first aspect, an embodiment of the present invention provides a nuclear energy heating system using integrated smart energy, including a CAP nuclear power heating unit and an integrated smart energy heating network temperature adjustment subsystem, wherein the CAP nuclear power heating unit and the integrated smart energy heating network temperature adjustment subsystem are both connected to a heating pipeline; Among them, the temperature regulation subsystem of the comprehensive intelligent energy heating network includes a new energy power generation system, an energy storage device, a distribution network, an electric heater and a circuit switch. The power outlet of the new energy power generation system is connected to the power inlet of the energy storage device, and the power outlet of the energy storage device is connected to the distribution network and the electric heater respectively through the circuit switch.

[0008] Furthermore, the circuit switch is a single-pole double-throw switch having three terminals K1, K2, and K3, the power outlet of the energy storage device is connected to the K1 terminal of the circuit switch, the power inlet of the distribution network is connected to the K2 terminal of the circuit switch, and the power inlet of the electric heater is connected to the K3 terminal of the circuit switch.

[0009] Furthermore, the CAP nuclear power heating unit includes a reactor, a steam generator, a steam turbine and a high-temperature heat source heater, wherein the reactor is connected to the steam generator, the steam outlet of the steam generator is connected to the steam inlet of the intermediate pressure cylinder of the steam turbine, the exhaust port of the intermediate pressure cylinder is connected to the steam inlet of the low pressure cylinder, the steam turbine is also connected to the generator, and the intermediate pressure cylinder, the low pressure cylinder and the generator are coaxially arranged.

[0010] Furthermore, the steam extraction port of the intermediate pressure cylinder is connected to the steam inlet of the high-temperature heat source heater through a middle exhaust steam extraction valve.

[0011] Furthermore, the water inlet of the electric heater is connected to the return water pipe of the heating network through a heating pipe, the water outlet of the electric heater is connected to the cold water inlet of the high-temperature heat source heater through a heating pipe, the hot water outlet of the high-temperature heat source heater is connected to the water inlet of the heating network water circulation pump through a heating pipe, and the water outlet of the heating network water circulation pump is connected to the water supply pipe of the heating network through a heating pipe.

[0012] Furthermore, the temperature regulation subsystem of the integrated smart energy heating network also includes an inverter and an artificial intelligence device. The power outlet of the new energy power generation system is connected to the power inlet of the inverter. The power outlet of the inverter is connected to the charging circuit interface of the energy storage device through the energy storage device charging regulation device. The power outlet of the energy storage device is connected through the energy storage device discharging regulation device. The energy storage device discharging regulation device is connected to the external discharge circuit interface of the energy storage device. The artificial intelligence device is respectively connected to the energy storage device charging regulation device, the energy storage device discharging regulation device and the energy storage device.

[0013] Furthermore, the new energy power generation system adopts N-type heterojunction photovoltaic modules and offshore wind turbines with a single unit power of more than 8MW; the energy storage device is a containerized energy storage power station using lithium iron phosphate battery packs.

[0014] Furthermore, the water inlet of the electric heater is connected to the heating pipe through an inlet pipe, and an electric heater inlet valve is provided on the inlet pipe. The water outlet of the electric heater is connected to the heating pipe through an outlet pipe, and an electric heater outlet valve is provided on the outlet pipe.

[0015] Furthermore, a heating network pipeline water valve is provided on the heating pipeline between the water inlet pipeline and the water outlet pipeline.

[0016] Secondly, an embodiment of the present invention provides a nuclear energy heating method using integrated smart energy, using a nuclear energy heating system using integrated smart energy as described above, comprising the following steps: When the nuclear power unit is in operation during the heating period, the temperature regulation subsystem of the integrated smart energy heating network provides heating, the K1 and K3 terminals of the circuit switch are connected, the energy storage device releases electric energy, the electric heater is put into operation and preheats the heating network water, the middle row steam extraction valve is opened, the middle row steam is extracted, the high-temperature heat source heater is put into operation, the heating network water is heated for the second time and then sent to the heating network water supply pipeline; During the non-heating period of the nuclear power unit, the temperature control subsystem of the integrated intelligent energy thermal network generates electricity, the K1 and K2 terminals of the circuit switch are connected, the electricity generated by the new energy power generation system is stored in the energy storage device, and the surplus electricity is connected to the grid when the opportunity arises. The electric heater is shut down, the middle exhaust steam extraction valve is closed, and the high-temperature heat source heater is shut down.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention makes full use of wind and solar resources by utilizing an integrated intelligent energy system, and adds circuit switches to regulate the stored electric energy for "dual use of heating and power supply". Based on the second law of thermodynamics, an integrated intelligent energy heat network temperature regulation subsystem is added to carry out heating transformation of the nuclear energy heating unit, thereby avoiding the large temperature difference heat exchange in the conventional heating process and realizing low energy consumption operation of the heating process.

[0018] 2. The present invention sets a circuit switch to regulate the flow of electric energy according to the demand for power generation or heat supply when the integrated smart energy system is working, thereby realizing the conversion of the working state of the integrated smart energy system, thereby improving the flexible adjustment capability of the nuclear cogeneration unit.

[0019] 3. The present invention preheats the return water of the heat network by arranging an electric heater, thereby reducing the temperature difference in the heat exchange process of the high-temperature heat source heater, avoiding the large temperature difference heat exchange in the conventional heating process, and realizing low energy consumption operation of the heating process, thereby improving the economy of the nuclear energy heating unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a nuclear energy heating system in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of the temperature regulation subsystem of the integrated smart energy heating network in the first embodiment of the present invention; Figure 3 This is a schematic diagram of the connection between the electric heater and the heating pipeline in the first embodiment of the present invention; Among them, 1. Reactor; 2. Steam generator; 3. Medium-pressure cylinder; 4. Low-pressure cylinder; 5. Generator; 6. Middle-row steam extraction valve; 7. High-temperature heat source heater; 8. New energy power generation system; 9. Energy storage device; 10. Distribution network; 11. Heating network water supply pipeline; 12. Electric heater; 13. Heating network water circulation pump; 14. Heating network return pipeline; 15. Integrated smart energy heating network temperature regulation subsystem; 16. Circuit switch; 17. Inverter; 18. Artificial intelligence equipment; 19. Energy storage device charging regulation device; 20. Energy storage device discharge regulation device; 21. Electric heater water inlet valve; 22. Electric heater water outlet valve; 23. Heating pipeline water valve. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Embodiment 1 A typical implementation of the present invention is as follows Figure 1 As shown, a nuclear energy heating system and method using integrated smart energy include a CAP nuclear power heating unit and an integrated smart energy heating network temperature regulation subsystem 15. The CAP nuclear power heating unit has a capacity level of 1200MW and above. The CAP nuclear power heating unit and the integrated smart energy heating network temperature regulation subsystem 15 are both connected to a heating pipeline, one end of the heating pipeline is connected to a heating network return water pipeline 14, and the other end is connected to a heating network water supply pipeline 11. The CAP nuclear power heating unit and the integrated smart energy heating network temperature regulation subsystem 15 jointly provide a heat source for the heating network pipeline.

[0023] The CAP nuclear power heating unit includes a reactor 1, a steam generator 2, a steam turbine and a high-temperature heat source heater 7, wherein the reactor 1 is connected to the steam generator 2, the steam outlet of the steam generator 2 is connected to the steam inlet of the intermediate pressure cylinder 3 of the steam turbine, the exhaust port of the intermediate pressure cylinder 3 is connected to the steam inlet of the low pressure cylinder 4, the steam turbine is also connected to the generator 5, and the intermediate pressure cylinder 3, the low pressure cylinder 4 and the generator 5 are coaxially arranged.

[0024] The steam extraction port of the medium pressure cylinder 3 is connected to the steam inlet of the high temperature heat source heater 7 through the medium exhaust steam extraction valve 6. The high temperature heat source heater 7 is connected to the heating pipeline. The high temperature heat source heater 7 uses the medium exhaust steam as a high temperature heat source to heat the hot network water in the heating pipeline.

[0025] The temperature regulation subsystem 15 of the integrated intelligent energy heating network includes a new energy power generation system 8, an energy storage device 9, a distribution network 10, an electric heater 12 and a circuit switch 16. The circuit switch 16 is a single-pole double-throw switch with three terminals K1, K2 and K3. The power outlet of the new energy power generation system 8 is connected to the power inlet of the energy storage device 9, the power outlet of the energy storage device 9 is connected to the K1 terminal of the circuit switch 16, the power inlet of the distribution network 10 is connected to the K2 terminal of the circuit switch 16, and the power inlet of the electric heater 12 is connected to the K3 terminal of the circuit switch 16. The operation and shut-off of the electric heater 12 are achieved by changing the contact mode of the terminals.

[0026] By setting the circuit switch 16, when the integrated intelligent energy system is working, the flow of electric energy is regulated according to the demand for power generation or heat supply, so as to realize the conversion of the working state of the integrated intelligent energy system, thereby improving the flexible adjustment capability of the nuclear cogeneration unit.

[0027] The new energy power generation system 8 acts as a heating power source in the heating season. In the heating season, the K1 terminal of the circuit switch 16 is connected to the K3 terminal, and the electric heater 12 is powered by the energy storage device 9; in the non-heating season, it acts as a power generation power source. In the non-heating season, the K1 terminal of the circuit switch 16 is connected to the K2 terminal, and the power outlet of the energy storage device 9 is connected to the power inlet of the distribution network 10. The energy storage device 9 transmits electricity to the distribution network 10 during peak power hours, so that surplus electricity can be connected to the grid, participate in electricity market transactions, and improve the profitability of nuclear power plants.

[0028] The water inlet of the electric heater 12 is connected to the heat network return pipe 14 through a heating pipe, the water outlet of the electric heater 12 is connected to the cold water inlet of the high-temperature heat source heater 7 through a heating pipe, the hot water outlet of the high-temperature heat source heater 7 is connected to the water inlet of the heat network water circulation pump 13 through a heating pipe, and the water outlet of the heat network water circulation pump 13 is connected to the heat network water supply pipe 11 through a heating pipe.

[0029] The electric heater 12 slightly heats the hot network water supply with a lower temperature and then sends it out. The high-temperature heat source heater 7 uses the exhaust steam as a high-temperature heat source to reheat the hot network water that has been heated once in the electric heater 12 and then sends it out. By arranging the electric heater 12 to preheat the hot network return water, the temperature difference in the heat exchange process of the high-temperature heat source heater 7 is reduced, the large temperature difference heat exchange in the conventional heating process is avoided, and the low energy consumption operation of the heating process is achieved.

[0030] The new energy power generation system 8 adopts photovoltaic power generation within the nuclear power plant and wind power generation in the sea area near the nuclear power plant, and its power output is all green electricity. The electric heater 12 is a device that uses the green electricity output by the new energy power generation system to heat the low-temperature hot network water to obtain hot network water with a higher temperature. It is emphasized here that the devices that use green electricity as the power input to heat the hot network water and are used in nuclear power units are all within the scope of protection of the present invention.

[0031] Specifically, the new energy power generation system 8 adopts N-type heterojunction photovoltaic modules and an offshore wind turbine with a single unit power of more than 8MW; the energy storage device 9 is a containerized energy storage power station using a lithium iron phosphate battery pack, which controls the electric energy release rate by adjusting the electric energy output power and changing the heat exchange amount in the electric heater 12. Furthermore, if Figure 2 As shown, the integrated intelligent energy thermal network temperature regulation subsystem 15 also includes an inverter 17 and an artificial intelligence device 18. The power outlet of the new energy power generation system 8 is connected to the power inlet of the inverter 17. The power outlet of the inverter 17 is connected to the charging circuit interface of the energy storage device 9 through the energy storage device charging regulation device 19. The power outlet of the energy storage device 9 is connected through the energy storage device discharge regulation device 20. The energy storage device discharge regulation device 20 is connected to the external discharge circuit interface of the energy storage device 9.

[0032] The artificial intelligence device 18 is respectively connected to the energy storage device charging regulation device 19, the energy storage device discharging regulation device 20 and the energy storage device 9. The artificial intelligence device 18 is used to regulate the charging and discharging rate of the energy storage device 9 in combination with information such as electricity price and electricity demand. The energy storage device charging regulation device 19 and the energy storage device discharging regulation device 20 are controlled by the artificial intelligence device 18 to regulate the charging and discharging of the energy storage device 9.

[0033] The artificial intelligence device described in this embodiment refers to an energy digital management and control platform that integrates the functions of smart energy system monitoring, prediction, regulation, analysis and service, such as the "Tianshu No. 1" comprehensive smart energy management and service platform developed by the State Power Investment Group, which can allocate and manage comprehensive smart energy, realize source-grid-load-storage interaction and improve energy utilization efficiency. The above-mentioned artificial intelligence device 18 regulates the charging and discharging of the energy storage device 9 as an existing technology, and will not be described in detail again.

[0034] In another embodiment, Figure 3 As shown, the water inlet of the electric heater 12 is connected to the heating pipe through the water inlet pipe, and an electric heater water inlet valve 21 is provided on the water inlet pipe. The water outlet of the electric heater 12 is connected to the heating pipe through the water outlet pipe, and an electric heater water outlet valve 22 is provided on the water outlet pipe. A heating pipe water valve 23 is provided on the heating pipe between the water inlet pipe and the water outlet pipe.

[0035] During normal heating, the electric heater water inlet valve 21 and the electric heater water outlet valve 22 are normally open, and the heating pipe water valve 23 is normally closed. At this time, the hot water in the hot network pipe is heated by the electric heater 12. When the electric heater 12 fails and needs to be shut down and cut off, the electric heater water inlet valve 21 and the electric heater water outlet valve 22 are closed, and the heating pipe water valve 23 is opened to cut off the electric heater 12 from the hot network pipe, making it convenient to repair the electric heater 12.

[0036] Embodiment 2 A nuclear energy heating method using integrated smart energy, using a nuclear energy heating system using integrated smart energy as described in Example 1, comprises the following steps: When the nuclear power unit is in operation during the heating period, the temperature regulation subsystem of the integrated smart energy heating network provides heating, the K1 and K3 terminals are connected, the energy storage device releases electric energy, the electric heater is put into operation and preheats the heating network water, the middle row steam extraction valve is opened, the middle row steam is extracted, the high-temperature heat source heater is put into operation, the heating network water is heated for the second time and then sent to the heating network water supply pipeline; The green electricity provided by the integrated smart energy system drives the electric heater to preheat the hot network water, reduce the secondary heat exchange temperature difference, avoid the large temperature difference heat exchange in the conventional heating process, and achieve low energy consumption operation of the heating process.

[0037] During the non-heating period of the nuclear power unit, the temperature regulation subsystem of the integrated intelligent energy thermal network generates electricity, the K1 and K2 terminals are connected, the electricity generated by the new energy power generation system is stored in the energy storage device, and the surplus electricity is connected to the grid when the opportunity arises. The electric heater is shut down, the middle exhaust steam extraction valve is closed, the high-temperature heat source heater is shut down, and the energy storage device transmits electricity to the distribution network during peak power hours, participates in electricity market transactions, and improves the profitability of nuclear power plants.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A nuclear energy heating system using integrated smart energy, characterized in that: It includes a CAP nuclear power heating unit and a temperature regulating subsystem of an integrated smart energy heating network, wherein both the CAP nuclear power heating unit and the temperature regulating subsystem of an integrated smart energy heating network are connected to a heating pipeline; Among them, the temperature regulation subsystem of the comprehensive intelligent energy heating network includes a new energy power generation system, an energy storage device, a distribution network, an electric heater and a circuit switch. The power outlet of the new energy power generation system is connected to the power inlet of the energy storage device, and the power outlet of the energy storage device is connected to the distribution network and the electric heater respectively through the circuit switch.

2. A nuclear energy heating system using integrated smart energy as claimed in claim 1, characterized in that: The circuit switch is a single-pole double-throw switch with three terminals K1, K2, and K3. The power outlet of the energy storage device is connected to the K1 terminal of the circuit switch, the power inlet of the distribution network is connected to the K2 terminal of the circuit switch, and the power inlet of the electric heater is connected to the K3 terminal of the circuit switch.

3. A nuclear energy heating system using integrated smart energy as claimed in claim 1, characterized in that: The CAP nuclear power heating unit includes a reactor, a steam generator, a steam turbine and a high-temperature heat source heater, wherein the reactor is connected to the steam generator, the steam outlet of the steam generator is connected to the steam inlet of the intermediate pressure cylinder of the steam turbine, the exhaust port of the intermediate pressure cylinder is connected to the steam inlet of the low pressure cylinder, the steam turbine is also connected to the generator, and the intermediate pressure cylinder, the low pressure cylinder and the generator are coaxially arranged.

4. A nuclear energy heating system using integrated smart energy as claimed in claim 3, characterized in that: The steam extraction port of the intermediate pressure cylinder is connected to the steam inlet of the high-temperature heat source heater through the intermediate exhaust steam extraction valve.

5. A nuclear energy heating system using integrated smart energy as claimed in claim 1, characterized in that: The water inlet of the electric heater is connected to the return water pipe of the heating network through a heating pipe, the water outlet of the electric heater is connected to the cold water inlet of the high-temperature heat source heater through a heating pipe, the hot water outlet of the high-temperature heat source heater is connected to the water inlet of the heating network water circulation pump through a heating pipe, and the water outlet of the heating network water circulation pump is connected to the water supply pipe of the heating network through a heating pipe.

6. A nuclear energy heating system using integrated smart energy as claimed in claim 1, characterized in that: The temperature regulation subsystem of the integrated intelligent energy heating network also includes an inverter and an artificial intelligence device. The power outlet of the new energy power generation system is connected to the power inlet of the inverter. The power outlet of the inverter is connected to the charging circuit interface of the energy storage device through the energy storage device charging regulation device. The power outlet of the energy storage device is connected through the energy storage device discharging regulation device. The energy storage device discharging regulation device is connected to the external discharge circuit interface of the energy storage device. The artificial intelligence device is respectively connected to the energy storage device charging regulation device, the energy storage device discharging regulation device and the energy storage device.

7. A nuclear energy heating system using integrated smart energy as claimed in claim 1, characterized in that: The new energy power generation system adopts N-type heterojunction photovoltaic modules and offshore wind turbines with a single unit power of more than 8MW, and the energy storage device is a container-type energy storage power station using lithium iron phosphate battery packs.

8. A nuclear energy heating system using integrated smart energy as claimed in claim 1, characterized in that: The water inlet of the electric heater is connected to the heating pipe through an inlet pipe, and an electric heater inlet valve is arranged on the inlet pipe. The water outlet of the electric heater is connected to the heating pipe through an outlet pipe, and an electric heater outlet valve is arranged on the outlet pipe.

9. A nuclear energy heating system using integrated smart energy as claimed in claim 1, characterized in that: A heating network pipeline water valve is arranged on the heating pipeline between the water inlet pipeline and the water outlet pipeline.

10. A nuclear energy heating method using integrated smart energy, using a nuclear energy heating system using integrated smart energy as described in any one of claims 1 to 9, characterized in that: The following steps are involved: When the nuclear power unit is in operation during the heating period, the temperature regulation subsystem of the integrated smart energy heating network provides heating, the K1 and K3 terminals of the circuit switch are connected, the energy storage device releases electric energy, the electric heater is put into operation and preheats the heating network water, the middle row steam extraction valve is opened, the middle row steam is extracted, the high-temperature heat source heater is put into operation, the heating network water is heated for the second time and then sent to the heating network water supply pipeline; During the non-heating period of the nuclear power unit, the temperature control subsystem of the integrated intelligent energy thermal network generates electricity, the K1 and K2 terminals of the circuit switch are connected, the electricity generated by the new energy power generation system is stored in the energy storage device, and the surplus electricity is connected to the grid when the opportunity arises. The electric heater is shut down, the middle exhaust steam extraction valve is closed, and the high-temperature heat source heater is shut down.

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