Energy storage peak regulation device and nuclear power generation steam supply system

Abstract

The present invention discloses an energy storage peak-shaving device and a nuclear power generation steam supply system, the device comprising: a power generation unit, a heat storage regulating component and a heat release component. The power generation unit comprises a heat source device and a steam turbine, the heat source device is connected to the steam turbine, and the heat source device is used to produce main steam to drive the steam turbine to discharge; the heat storage regulating component is located between the power generation unit and the heat release component, one end of the heat storage regulating component is connected to the power generation unit, and is used to receive the main steam generated by the power generation unit that exceeds the requirements of the steam turbine, and store the heat in the main steam; the other end of the heat storage regulating component is connected to the heat release component, and is used to output heat energy to the heat release component, and the heat release component is used to convert the received heat energy into steam output. The energy storage peak-shaving device can effectively improve the economy of nuclear power units when participating in peak regulation.

Description

Technical Field

[0001] The present invention specifically relates to an energy storage peak-shaving device and a nuclear power generation steam supply system. Background Art

[0002] At present, nuclear power generation is developing well and plays an important role in energy transformation. Nuclear power generating units mainly operate under stable and large-scale power loads, that is, nuclear power units usually produce relatively constant power output. However, power demand fluctuates significantly at different times. For example, morning and evening are peak periods, while night and weekday noon are low periods. Nuclear power units cannot respond quickly to changes in grid load demand, which will cause a great waste of nuclear energy and electricity, and lead to low economic efficiency of nuclear power units. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an energy storage peak-shaving device and a nuclear power generation steam supply system in view of the above-mentioned deficiencies in the prior art. The energy storage peak-shaving device can effectively improve the economy of nuclear power units.

[0004] According to an embodiment of the first aspect of the present invention, there is provided an energy storage peak-shaving device, comprising: a power generation unit, a heat storage regulation component and a heat release component; the power generation unit comprises a heat source device and a steam turbine, the heat source device is connected to the steam turbine, and the heat source device is used to produce main steam to drive the steam turbine to discharge; the heat storage regulation component is located between the power generation unit and the heat release component, one end of the heat storage regulation component is connected to the heat source device, and is used to receive the main steam generated by the heat source device that exceeds the requirement of the steam turbine, and store the heat in the main steam; the other end of the heat storage regulation component is connected to the heat release component, and is used to output heat energy to the heat release component, and the heat release component is used to convert the received heat energy into steam output.

[0005] Preferably, the heat storage and regulation component includes a heat storage unit, and the heat storage unit includes a first passage and a second passage. The first passage of the heat storage unit is connected to the heat source device and is used to receive the main steam output by the heat source device. The second passage is filled with a heat storage medium. The first passage is coupled to the second passage and is used to heat the heat storage medium by the main steam. The second passage is connected to the heat release component and is used to output the heated high-temperature heat storage medium to the heat release component, thereby outputting heat energy to the heat release component.

[0006] Preferably, the heat storage unit is provided with a main steam inlet and a condensate outlet, the main steam inlet and the condensate outlet are connected via a first passage, the heat source device is provided with a main steam outlet and a condensate reflux port, the main steam outlet is connected to the main steam inlet, the condensate outlet is connected to the condensate reflux port, the main steam output by the heat source device that exceeds the requirement of the steam turbine enters the heat storage unit, and after heat exchange with the heat storage medium in the heat storage unit, is condensed into condensate, and the condensate flows back to the interior of the heat source device via the condensate outlet and the condensate reflux port for the next steam cycle.

[0007] Preferably, the heat storage unit is further provided with a high-temperature medium outlet and a low-temperature medium inlet, the low-temperature medium inlet and the high-temperature medium outlet are communicated with each other through a second passage, the heat release component is provided with a high-temperature medium inlet and a low-temperature medium outlet, the low-temperature medium outlet is communicated with the low-temperature medium inlet, the high-temperature medium outlet is communicated with the high-temperature medium inlet, the low-temperature heat storage medium enters the second passage through the low-temperature medium inlet, after the main steam in the first passage heats the low-temperature heat storage medium in the second passage, the low-temperature heat storage medium is converted into the high-temperature heat storage medium, the high-temperature heat storage medium enters the heat release component through the high-temperature medium outlet and the high-temperature medium inlet, after the heat release component converts the received heat energy of the high-temperature heat storage medium into steam output, the high-temperature heat storage medium is converted back into the low-temperature heat storage medium, and flows back to the second passage through the low-temperature medium outlet and the low-temperature medium inlet for the next cycle.

[0008] Preferably, the heat storage unit includes a heat exchange device, the first passage is coupled to the second passage through the heat exchange device, the heat exchange device is provided with a hot side and a cold side, and the hot side and the cold side of the heat exchange device are connected through a heat exchange surface; wherein, the first passage is communicated with the hot side of the heat exchange device so that the main steam flows through the hot side of the heat exchange device, and the second passage is communicated with the cold side of the heat exchange device so that the heat storage medium flows through the cold side of the heat exchange device; when the main steam enters the hot side of the heat exchange device, the heat storage medium in the cold side of the heat exchange device is heated, thereby converting the heat storage medium into a high-temperature heat storage medium.

[0009] Preferably, the heat exchange device comprises a first heater and a second heater, the first passage is coupled to the second passage through the first heater and the second heater, the first heater is provided with a first hot side and a first cold side, the second heater is provided with a second hot side and a second cold side, the heat exchange surface of the heat exchange device comprises a first heat exchange surface and a second heat exchange surface, the first hot side is connected to the first cold side through the first heat exchange surface, and the second hot side is connected to the second cold side through the second heat exchange surface; wherein, the first passage is sequentially connected with the hot side of the first heater and the hot side of the second heater, so that the main steam flows through the hot side of the first heater and the hot side of the second heater in sequence, the second passage is sequentially connected with the second heater and the cold side of the cold side of the first heater, so that the heat storage medium flows through the cold side of the second heater and the cold side of the first heater in sequence, and the flow direction of the main steam is opposite to that of the heat storage medium; when the main steam in the first passage enters the hot side of the first heater, the heat storage medium in the cold side of the first heater is heated, thereby converting the heat storage medium into a high-temperature heat storage medium; when the main steam enters the hot side of the second heater, the heat storage medium in the cold side of the second heater is preheated.

[0010] Preferably, the hot side of the first heater is set as a first hot side pipe, the cold side of the first heater is set as a first cold side pipe, the first hot side pipe surrounds the first cold side pipe, and the first heat exchange surface is located between the first hot side pipe and the first cold side pipe, which is used for heat exchange between the first hot side pipe and the first cold side pipe; the hot side of the second heater is set as a second hot side pipe, the cold side of the second heater is set as a second cold side pipe, the second hot side pipe surrounds the second side pipe, and the second heat exchange surface is located between the second hot side pipe and the second cold side pipe, which is used for heat exchange between the second hot side pipe and the second cold side pipe.

[0011] Preferably, the heat storage unit further includes a high-temperature water tank and a low-temperature water tank, the high-temperature water tank being located between the cold-side outlet of the heat exchange device and the high-temperature medium inlet of the heat release component, and the high-temperature water tank being used to temporarily store the high-temperature heat storage medium, and the low-temperature water tank being located between the cold-side inlet of the heat exchange device and the low-temperature medium outlet of the heat release component, and the low-temperature water tank being used to temporarily store the low-temperature heat storage medium.

[0012] Preferably, the heat storage regulating device further comprises a regulating unit, which is connected to the heat storage unit and is used to control the input of main steam on the first passage and the output of high-temperature heat storage medium on the second passage.

[0013] Preferably, the regulating unit includes a first regulating valve, a second regulating valve and a controller; the first regulating valve is installed on the first passage to adjust the opening of the first passage, and the second regulating valve is installed on the second passage to adjust the opening of the second passage; the controller is electrically connected to the first regulating valve and the second regulating valve respectively, and the controller is preset with the power generation demand information of the steam turbine and the steam output demand information of the heat release component. The controller is used to adjust the opening of the first regulating valve according to the power generation demand information of the steam turbine, thereby controlling the input amount of main steam on the first passage, and the controller is also used to adjust the opening of the second regulating valve according to the steam output demand information of the heat release component, thereby controlling the output of the high-temperature heat storage medium on the second passage.

[0014] Preferably, the first regulating valve is located at the main steam inlet of the first passage, and the second regulating valve is located at the high-temperature medium outlet of the second passage. The controller is used to control the opening of the first regulating valve to decrease when the power generation demand of the steam turbine increases, or to control the opening of the first regulating valve to increase when the power generation demand of the steam turbine decreases; the controller is also used to control the opening of the second regulating valve to increase when the steam output demand of the thermal component increases, or to control the opening of the second regulating valve to decrease when the steam output demand of the thermal component decreases.

[0015] Preferably, the heat release component includes a third passage and a fourth passage, the heat release component is provided with a high-temperature medium inlet and a low-temperature medium outlet, the high-temperature medium inlet and the low-temperature medium outlet are communicated through the third passage, the heat storage unit is provided with a high-temperature medium outlet and a low-temperature medium inlet, the high-temperature medium outlet and the low-temperature medium inlet are communicated through the second passage; the high-temperature medium inlet of the third passage is communicated with the high-temperature medium outlet of the second passage, for receiving the high-temperature heat storage medium output by the second passage, the low-temperature medium outlet of the third passage is communicated with the low-temperature medium outlet of the second passage, for allowing the low-temperature heat storage medium to flow back into the third passage; a water inlet is provided at one end of the fourth passage, the water inlet is used for allowing desalted water to flow in, a steam outlet is provided at the other end of the fourth passage, the third passage is coupled to the fourth passage, for heating the desalted water in the fourth passage, so that the desalted water is converted into steam for output.

[0016] Preferably, the heat release component also includes a steam generating device, the third passage is coupled to the fourth passage through the steam generating device, the steam generating device is provided with a hot side and a cold side, and the hot side and the cold side of the steam generating device are connected through a heat exchange surface; the third passage is communicated with the hot side of the steam generating device, so that a high-temperature heat storage medium flows through the hot side of the steam generating device, and the fourth passage is communicated with the cold side of the steam generating device, so that desalted water flows through the cold side of the steam generating device, and when the high-temperature heat storage medium in the third passage enters the hot side of the steam generating device, the desalted water in the cold side of the steam generating device can be heated to generate steam.

[0017] According to an embodiment of the second aspect of the present invention, there is provided a nuclear power generation steam supply system, comprising a nuclear reactor and the above-mentioned energy storage peak-shaving device, wherein the nuclear reactor is connected to a heat source device of the energy storage peak-shaving device and is used to output heat energy to the heat source device to generate main steam, and a heat storage regulating component in the energy storage peak-shaving device is used to receive and store the heat energy of the main steam and is capable of outputting heat energy to the heat releasing component, and the heat releasing component is used to convert the received heat energy into steam output.

[0018] The energy storage peak-shaving device in the present invention receives the main steam produced by the heat source equipment that exceeds the requirements of the steam turbine through the heat storage regulation component, and stores the heat in the main steam. The heat storage regulation component is also used to output heat energy to the heat release component, and the heat release component is used to convert the received heat energy into steam output. These steam outputs can be used as industrial steam for other equipment in the park; they can also be returned to the steam turbine when the electricity demand reaches a peak, to ensure that the steam turbine can provide sufficient electricity to meet the demand. Therefore, this energy storage peak-shaving device can achieve that when the nuclear power unit participates in the peak regulation of the power grid, the steam turbine operates at reduced power while the reactor does not reduce power, thereby avoiding or reducing the number of reactor adjustments and transient times, and improving the economy and safety of the nuclear power unit. In summary, this energy storage peak-shaving device can achieve peak regulation of nuclear power units, and effectively improve the economy and safety of nuclear power units. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the structure of an energy storage peak-shaving device in some embodiments of the present invention;

[0020] Figure 2 is a schematic diagram of the structure of the main steam circulation loop in some embodiments of the present invention;

[0021] Figure 3 is a schematic diagram of the structure of a high-pressure water circulation loop in some embodiments of the present invention;

[0022] Figure 4 is a schematic diagram of the structure of the first path in some embodiments of the present invention;

[0023] Figure 5 is a schematic diagram of the structure of the second path in some embodiments of the present invention;

[0024] Figure 6 is a schematic structural diagram of a third path in some embodiments of the present invention;

[0025] Figure 7 is a schematic structural diagram of the fourth path in some embodiments of the present invention.

[0026] In the figure: 1-capacity unit, 101-heat storage steam circuit, 102-condensate circuit, 103-nuclear reactor, 104-unit evaporator, 2-heat storage adjustment component, 21-first passage, 22-second passage, 201-first heater, 202-high temperature water tank, 212-high temperature water tank regulator, 203-low temperature water tank, 213-low temperature water tank regulator, 204-heat storage circulation pump, 205-second heater, 3-heat release component, 31- The third passage, 32-the fourth passage, 33-steam generating equipment, 301-desalted water replenishment branch, 302-the second circuit feed water branch, 311-the first feed water pump, 312-the first preheater, 313-the deaerator, 314-the second feed water pump, 315-the second preheater, 316-the heat exchange evaporator, 317-the superheater, 321-the industrial steam branch, 322-the heat recovery steam branch, 4-the first regulating valve, 5-the second regulating valve, 6-the steam turbine. DETAILED DESCRIPTION

[0027] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "upstream", "downstream" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience and simplification of the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0029] In the description of the present invention, the terms “first”, “second” and “third” are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connect", "set", "install", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] First of all, it should be noted that the national development plan considers the moderate participation of nuclear power in peak regulation and flexible operation to improve the adjustability of nuclear power. However, nuclear power peak regulation has the problem of reduced safety and economy, so a way or method that can solve this problem is needed.

[0032] In recent years, the comprehensive utilization of nuclear energy has developed well, especially the application of nuclear energy for steam supply has become a focus of the multi-purpose use of nuclear energy.

[0033] Based on the above reasons, the study found that nuclear power peak regulation can be coupled with nuclear steam supply through heat storage. The peak-shaving reactor power can be used for energy storage when the power grid is in the trough, and the stored heat can be used for nuclear steam supply or continued power generation during the peak. The reactor does not need to participate in peak regulation and can generate electricity at full power. The energy storage and steam turbine systems participate in energy supply and power generation. In this way, while ensuring the safe operation of the reactor, the industrial steam load and electricity load in different periods can be guaranteed, thereby improving the safety and economy of nuclear power.

[0034] The design principle of the energy storage peak-shaving device in the present invention is generally described below:

[0035] like Figure 1 The energy storage peak-shaving device is mainly realized through two thermal energy cycles. Among them, the first cycle is the main steam cycle, which includes the first sub-cycle and the second sub-cycle. The second cycle is the high-pressure water cycle (i.e. the heat storage medium cycle).

[0036] like Figure 2 As shown, the starting point and end point of the main steam cycle are the evaporator (unit evaporator 104) in the nuclear power unit, and the evaporator is heated by the nuclear reactor 103. There is condensate in the evaporator, and the nuclear reactor 103 provides heat to heat and boil the condensate in the evaporator, thereby generating main steam. A part of the main steam enters the first sub-cycle, and the other part enters the second sub-cycle. The main steam in the first sub-cycle drives the steam turbine 6 to generate electricity. In the first sub-cycle, after the thermal energy of the main steam is converted into the kinetic energy of the steam turbine 6, the main steam is re-condensed into condensate and refluxed into the evaporator.

[0037] The side of the high-pressure water cycle close to the second sub-cycle is set as the first side, and the other side is set as the second side. There is a heat exchange relationship between the second sub-cycle and the first side of the high-pressure water cycle, that is, the main steam in the second sub-cycle will heat the high-pressure water on the first side of the high-pressure water cycle, so that the high-pressure water is heated to high-temperature high-pressure water.

[0038] like Figure 3 As described above, a water storage tank (i.e., high-temperature water tank 202) is also provided in the high-pressure water cycle for storing high-temperature and high-pressure water, so as to achieve temporary storage of thermal energy. The second side of the high-pressure water cycle has a heat exchange relationship with the desalted water pipeline (i.e., the fourth passage 32) in the heat release system (i.e., the heat release component 3). After the high-temperature and high-pressure water in the high-pressure water cycle exchanges heat with the desalted water, the high-temperature and high-pressure water is converted into low-temperature and high-pressure water again, and flows back to the first side of the high-pressure water cycle for heating.

[0039] The heat provided by the high-temperature and high-pressure water heats and boils the desalted water in the desalted water pipeline, thereby generating steam. A portion of the steam generated in the desalted water pipeline is used for industrial heating, and the other portion can be used as a supplement to the steam in the steam turbine 6, thereby realizing diversified utilization of stored heat.

[0040] Example 1

[0041] See also Figure 1 The present invention discloses an energy storage peak-shaving device, comprising: a power generation unit 1, a heat storage regulation component 2 and a heat release component 3.

[0042] The power generation unit 1 includes a heat source device and a steam turbine 6. The heat source device is connected to the steam turbine 6. The heat source device is used to produce main steam to drive the steam turbine 6 to discharge. The heat storage and regulation component 2 is located between the power generation unit 1 and the heat release component 3. One end of the heat storage and regulation component 2 is connected to the heat source device, and is used to receive the main steam generated by the heat source device that exceeds the main steam required by the steam turbine 6, and store the heat in the main steam. The other end of the heat storage and regulation component 2 is connected to the heat release component 3, and is used to output heat energy to the heat release component 3. The heat release component 3 is used to convert the received heat energy into steam output.

[0043] It should be noted that this energy storage peak-shaving device is suitable for all production systems with relatively constant output energy, and is particularly suitable for use in the heat storage and heat release systems of nuclear power units. The heat source equipment in this device is used to produce main steam, and the main steam is used to drive the steam turbine 6 to generate electricity. Since the demand for electricity will fluctuate significantly at different times, the main steam actually required by the steam turbine 6 at different times is also different. Generally speaking, the main steam produced by the heat source equipment will be greater than the maximum value of the main steam actually required by the steam turbine 6.

[0044] For example, the maximum amount of steam required for a nuclear power unit's steam turbine 6 to generate electricity is 1000 t / h (tons / hour). At this time, the steam flow rate output by the heat source equipment usually reaches 1100 t / h to ensure that the steam turbine 6 can provide enough electricity to meet the demand. When the power demand reaches its peak, the steam amount required by the steam turbine 6 is 1000 t / h, and the nuclear power plant operates at full load; during periods of low power demand, the actual steam flow rate required by the steam turbine 6 may be only 600 t / h. At this time, the nuclear reactor 103 of the nuclear power unit should reduce the power generation to meet the economic requirements. However, the nuclear reactor 103 is usually unable to respond quickly to changes in load demand, that is, it cannot quickly adjust the output steam flow rate, which results in low economic efficiency of the nuclear power unit and a large waste of energy. At this time, although the nuclear reactor 103 still produces 1100t / h of steam, the flow is adjusted by controlling valves and other equipment to ensure that the steam turbine 6 only uses the required 600t / h of steam, and the extra 500t / h of steam flow is the main steam generated by the power generation unit 1 that exceeds the requirements of the steam turbine 6.

[0045] The device receives the main steam produced by the heat source equipment that exceeds the requirements of the steam turbine 6 through the heat storage and regulation component 2, and stores the heat in the main steam. The heat storage and regulation component 2 is also used to output heat energy to the heat release component 3, and the heat release component 3 is used to convert the received heat energy into steam output. The device has the following advantages:

[0046] 1. This device can improve the thermal efficiency of the system. The heat storage and regulation component 2 can effectively store the heat in the main steam generated by the heat source equipment that exceeds the actual demand of the steam turbine 6, which can avoid heat waste and improve the thermal efficiency of the entire system. In other words, during periods of low electricity demand, the heat storage and regulation component 2 can store excess heat and release it when demand rises, thereby coordinating the operation of the steam turbine 6 and optimizing the overall power generation efficiency.

[0047] 2. This device can improve the stability of the system. Since the nuclear reactor 103 itself cannot quickly respond to fluctuations in power demand, the heat storage and regulation component 2 in this device can smooth the fluctuations in heat supply between the heat source and the steam turbine 6, ensuring that the steam turbine 6 can operate stably under different loads, avoiding power generation interruptions caused by unstable steam supply.

[0048] 3. This device can reduce operating costs. Through efficient heat storage and regulation strategies, the heat storage and regulation component 2 can reduce the frequent regulation of the heat source equipment, which can reduce the cost of generating steam and equipment wear and extend its service life.

[0049] In summary, this device can effectively improve the economy of nuclear power units.

[0050] See also Figure 1In some embodiments, the heat storage regulating component 2 includes a heat storage unit, and the heat storage unit includes a first passage 21 and a second passage 22. The first passage 21 of the heat storage unit is connected to the heat source device and is used to receive the main steam output by the heat source device. The second passage 22 is filled with a heat storage medium. The first passage 21 is coupled to the second passage 22 and is used to heat the heat storage medium by the main steam. The second passage 22 is connected to the heat release component 3 and is used to output the heated high-temperature heat storage medium to the heat release component 3, thereby outputting heat energy to the heat release component 3.

[0051] It should be noted that coupling refers to a connection relationship between the first passage 21 and the second passage 22, so that the fluid in the first passage 21 can achieve heat exchange with the fluid in the second passage 22. The specific connection relationship between the first passage 21 and the second passage 22 will be described in detail later.

[0052] In this embodiment, heat exchange is achieved through the first passage 21 of the heat storage unit, and heat storage is achieved through the second passage 22. This has the advantage that heat in the main steam can be stored and reused, that is, the received heat energy is converted into steam output through the heat release component 3. These steam outputs can be used as industrial steam in the chemical park for use by other chemical equipment; they can also be returned to the steam turbine 6 when the power demand reaches a peak, to ensure that the steam turbine 6 can provide enough power to meet the demand.

[0053] Furthermore, the heat storage unit is provided with a main steam inlet and a condensate outlet, which are connected via a first passage 21. The heat source device is provided with a main steam outlet and a condensate reflux port, the main steam outlet is connected to the main steam inlet, and the condensate outlet is connected to the condensate reflux port, the main steam outputted by the heat source device that exceeds the requirement of the steam turbine 6 enters the heat storage unit, and after heat exchange with the heat storage medium in the heat storage unit, condenses into condensate, and the condensate flows back to the inside of the heat source device via the condensate outlet and the condensate reflux port to carry out the next steam cycle.

[0054] In this embodiment, the main steam outlet and condensate return port of the heat source device are respectively connected to the main steam inlet and condensate outlet at both ends of the first passage 21 of the heat storage unit to form a closed loop. Figure 1 As shown, part of the main steam produced by the heat source device enters the steam turbine 6 to drive the steam turbine 6 to generate electricity; another part of the main steam flows from the main steam outlet into the first passage 21. After the main steam exchanges heat with the heat storage medium in the second passage 22 in the first passage 21, the main steam condenses into condensate and flows back to the heat source device. The advantage of this arrangement is that the main steam can be circulated through the first passage 21, so that heat can be continuously transferred from the heat source device to the heat storage unit.

[0055] Furthermore, the heat storage unit is also provided with a high-temperature medium outlet and a low-temperature medium inlet, the low-temperature medium inlet and the high-temperature medium outlet are connected through the second passage 22, and the heat release component 3 is provided with a high-temperature medium inlet and a low-temperature medium outlet, the low-temperature medium outlet is connected to the low-temperature medium inlet, and the high-temperature medium outlet is connected to the high-temperature medium inlet. The low-temperature heat storage medium enters the second passage 22 through the low-temperature medium inlet, and after the main steam in the first passage 21 heats the low-temperature heat storage medium in the second passage 22, the low-temperature heat storage medium is converted into a high-temperature heat storage medium, and the high-temperature heat storage medium enters the heat release component 3 through the high-temperature medium outlet and the high-temperature medium inlet. After the heat release component 3 converts the heat energy received from the high-temperature heat storage medium into steam output, the high-temperature heat storage medium is converted back into a low-temperature heat storage medium, and flows back to the second passage 22 through the low-temperature medium outlet and the low-temperature medium inlet for the next cycle.

[0056] In this embodiment, the high-temperature medium outlet and the low-temperature medium inlet of the heat storage unit are respectively connected to the high-temperature medium inlet and the low-temperature medium outlet of the heat release component 3 to form a closed loop. The heat storage unit heats the low-temperature heat storage medium in the second passage 22 through the main steam in the first passage 21, so that the low-temperature heat storage medium is heated to a high-temperature heat storage medium, thereby realizing the heat transfer between the main steam and the heat storage medium. After the high-temperature heat storage medium enters the heat release component 3 through the second passage 22, the heat release component 3 converts the heat energy received from the high-temperature heat storage medium into steam output, and the high-temperature heat storage medium is converted back into a low-temperature heat storage medium, and flows back to the second passage 22 through the low-temperature medium outlet and the low-temperature medium inlet for the next cycle. The advantage of this arrangement is that the circulation of the heat storage medium can be realized through the second passage 22, so that heat can be continuously transferred from the heat storage unit to the heat release component 3.

[0057] See also Figure 4 and Figure 5 In some embodiments, the heat storage unit includes a heat exchange device, the first passage 21 is coupled to the second passage 22 through the heat exchange device, the heat exchange device is provided with a hot side and a cold side, and the hot side and the cold side of the heat exchange device are connected through a heat exchange surface. The first passage 21 is connected to the hot side of the heat exchange device so that the main steam flows through the hot side of the heat exchange device, and the second passage 22 is connected to the cold side of the heat exchange device so that the heat storage medium flows through the cold side of the heat exchange device. When the main steam enters the hot side of the heat exchange device, the heat storage medium in the cold side of the heat exchange device is heated, thereby converting the heat storage medium into a high-temperature heat storage medium.

[0058] Among them, the heat exchange equipment can adopt commercially available heat exchange equipment, such as: shell and tube heat exchanger, plate heat exchanger, etc. The working principles of different types of heat exchange equipment are roughly the same, as follows: Usually, a hot side and a cold side (i.e., a hot side channel and a cold side channel) are provided inside the shell of the heat exchanger. The hot side refers to the part of the fluid with a higher temperature, which is usually the fluid that needs to release heat. The cold side refers to the part of the fluid with a lower temperature, which is usually the fluid that needs to absorb heat. The hot side and the cold side are connected by a heat exchange surface. The hot side fluid flows into the heat exchanger and transfers heat to the cold side fluid through the heat exchange surface of the heat exchanger. The temperature of the hot side fluid decreases, while the temperature of the cold side fluid increases, thereby achieving effective heat exchange.

[0059] Specifically, the heat exchange device includes a first heater 201 and a second heater 205. The first passage 21 is coupled to the second passage 22 through the first heater 201 and the second heater 205. The first heater 201 is provided with a first hot side and a first cold side, and the second heater 205 is provided with a second hot side and a second cold side. The heat exchange surface of the heat exchange device includes a first heat exchange surface and a second heat exchange surface. The first hot side is connected to the first cold side through the first heat exchange surface, and the second hot side is connected to the second cold side through the second heat exchange surface. Figure 4 As shown, the first passage 21 is connected to the hot side of the first heater 201 and the hot side of the second heater 205 in sequence, so that the main steam flows through the hot side of the first heater 201 and the hot side of the second heater 205 in sequence; Figure 5 As shown, the second passage 22 is connected with the second heater 205 and the cold side of the first heater 201 in sequence, so that the heat storage medium flows through the cold side of the second heater 205 and the cold side of the first heater 201 in sequence, and the flow direction of the main steam is opposite to the flow direction of the heat storage medium. When the main steam in the first passage 21 enters the hot side of the first heater 201, the heat storage medium in the cold side of the first heater 201 is heated, thereby converting the heat storage medium into a high-temperature heat storage medium; when the main steam enters the hot side of the second heater 205, the heat storage medium in the cold side of the second heater 205 is preheated.

[0060] In this embodiment, the first heater 201 and the second heater 205 are both shell and tube heat exchangers or wrap-around heat exchangers.

[0061] like Figure 1As shown, after entering the first passage 21, the main steam passes through the first hot side and the second hot side in sequence, while the heat storage medium passes through the second cold side and the first cold side in sequence after entering the second passage 22, that is, the flow direction of the main steam is opposite to the flow direction of the heat storage medium. The heat carried by the main steam in the first hot side is relatively high. At this time, the first hot side and the first cold side exchange heat through the first heat exchange surface, and the heat storage medium can be heated to a high-temperature heat storage medium. After the heating of the heat storage medium is completed, the main steam consumes part of the heat and produces part of the condensate, but it still has a certain temperature and can continue to be used. The main steam in the mixed liquid phase is filtered by the hydrophobic equipment and converted into hydrophobic main steam, and flows into the second hot side. At this time, the hydrophobic main steam in the second hot side exchanges heat with the low-temperature heat storage medium in the second cold side through the second heat exchange surface, thereby realizing the preheating of the low-temperature heat storage medium.

[0062] The advantage of this arrangement is that the heat of the main steam can be fully utilized, thereby further improving the thermal efficiency of the system.

[0063] In some embodiments, the hot side of the first heater 201 is set as a first hot side pipe, the cold side of the first heater 201 is set as a first cold side pipe, the first hot side pipe surrounds the first cold side pipe, and the first heat exchange surface is located between the first hot side pipe and the first cold side pipe, and is used to perform heat exchange between the first hot side pipe and the first cold side pipe. The hot side of the second heater 205 is set as a second hot side pipe, the cold side of the second heater 205 is set as a second cold side pipe, the second hot side pipe surrounds the second side pipe, and the second heat exchange surface is located between the second hot side pipe and the second cold side pipe, and is used to perform heat exchange between the second hot side pipe and the second cold side pipe.

[0064] The advantage of this heat exchange structure is that the hot side pipe surrounds the cold side pipe, so that the heat is transferred in a shorter distance, increasing the contact area of ​​the fluid, thereby improving the heat exchange efficiency. The wraparound design can effectively utilize space, making the equipment more compact, while achieving efficient heat exchange in a limited space.

[0065] In some embodiments, the heat storage unit further includes a high-temperature water tank 202 and a low-temperature water tank 203. The high-temperature water tank 202 is located between the cold side outlet of the heat exchange device and the high-temperature medium inlet of the heat release component 3. The high-temperature water tank 202 is used to temporarily store the high-temperature heat storage medium. The low-temperature water tank 203 is located between the cold side inlet of the heat exchange device and the low-temperature medium outlet of the heat release component 3. The low-temperature water tank 203 is used to temporarily store the low-temperature heat storage medium.

[0066] In this embodiment, the heat storage medium can be high-pressure water or molten salt. Since the steam parameters of the nuclear power unit are low and the temperature of the heat storage medium is low, the high-temperature stability of the molten salt medium cannot play its advantages. Nuclear power heat storage requires storing more heat per unit volume. Therefore, high-pressure water is preferably used as the heat storage medium.

[0067] Specifically, a heat-insulating layer may be provided on the inner wall of the high-temperature water tank 202 to keep the high-pressure water warm, so as to better retain the heat of the high-pressure water.

[0068] Please continue reading Figure 1 In some embodiments, the heat storage regulating device further includes a regulating unit, which is connected to the heat storage unit and is used to control the input of main steam on the first passage 21 and the output of high-temperature heat storage medium on the second passage 22.

[0069] In essence, the input of the main steam on the first passage 21 is controlled by the regulating unit, that is, the main steam exceeding the main steam required by the steam turbine 6 is input into the first passage 21. Figure 1 As shown, the heat source device is connected to the steam turbine 6 and the first passage 21 through a connecting pipe (i.e., a heat storage steam loop 101). One end of the connecting pipe (heat storage steam loop 101) is connected to the main steam outlet of the heat source device, and the other end of the connecting pipe is provided with a first branch and a second branch, the first branch is connected to the steam turbine 6; the second branch is connected to the first passage 21, and is used to transport the main steam exceeding the requirement of the steam turbine 6 to the heat storage regulating component 2, so that the heat in the main steam is stored in the heat storage regulating component 2.

[0070] It can be seen that by controlling the main steam flow rate on the first passage 21 (i.e., the main steam flow rate of the second branch), the main steam flow rate of the first branch (i.e., the main steam flow rate entering the steam turbine 6) can be controlled. In other words, when the main steam flow rate in the second branch increases / decreases, the main steam flow rate in the first branch naturally decreases / increases.

[0071] The advantage of this arrangement is that the steam flow entering the steam turbine 6 can be adjusted at any time, thereby quickly responding to changes in load demand. At the same time, the heat in the main steam can be stored by the heat storage unit to avoid heat waste and improve the thermal efficiency of the entire system.

[0072] Wherein, the regulating unit includes a first regulating valve 4, a second regulating valve 5 and a controller. The first regulating valve 4 is installed on the first passage 21, and is used to adjust the opening of the first passage 21. The second regulating valve 5 is installed on the second passage 22, and is used to adjust the opening of the second passage 22. The controller is electrically connected to the first regulating valve 4 and the second regulating valve 5, respectively, and the controller is preset with the power generation demand information of the steam turbine 6 and the steam output demand information of the heat release component 3. The controller is used to adjust the opening of the first regulating valve 4 according to the power generation demand information of the steam turbine 6, thereby controlling the input amount of the main steam on the first passage 21, and the controller is also used to adjust the opening of the second regulating valve 5 according to the steam output demand information of the heat release component 3, thereby controlling the output of the high-temperature heat storage medium on the second passage 22.

[0073] In this embodiment, the flow of main steam entering the heat storage regulating component 2 is controlled by the first regulating valve 4, so as to realize the peak load regulation of the power grid, that is, to reduce the energy storage for power generation when the load demand of the power grid is at a trough; the high-temperature and high-pressure water entering the heat release component 3 is controlled by the second regulating valve 5, so that the stored energy can be released when the load demand of the power grid reaches a peak, thereby improving the power generation capacity of the unit, improving the load change adaptability of the nuclear power unit, achieving "peak shaving and valley filling", and improving the economy of the nuclear power unit.

[0074] Specifically, the first regulating valve 4 is located at the main steam inlet of the first passage 21, and the second regulating valve 5 is located at the high temperature medium outlet of the second passage 22. The controller is used to control the opening of the first regulating valve 4 to decrease when the power generation demand of the steam turbine 6 increases, or to control the opening of the first regulating valve 4 to increase when the power generation demand of the steam turbine 6 decreases; the controller is also used to control the opening of the second regulating valve 5 to increase when the steam output demand of the thermal component increases, or to control the opening of the second regulating valve 5 to decrease when the steam output demand of the thermal component decreases.

[0075] See also Figure 6 and Figure 7In some embodiments, the heat release component 3 includes a third passage 31 and a fourth passage 32. The heat release component 3 is provided with a high-temperature medium inlet and a low-temperature medium outlet, and the high-temperature medium inlet and the low-temperature medium outlet are connected through the third passage 31. The heat storage unit is provided with a high-temperature medium outlet and a low-temperature medium inlet, and the high-temperature medium outlet and the low-temperature medium inlet are connected through the second passage 22. The high-temperature medium inlet of the third passage 31 is connected with the high-temperature medium outlet of the second passage 22, and is used to receive the high-temperature heat storage medium output from the second passage 22. The low-temperature medium outlet of the third passage 31 is connected with the low-temperature medium outlet of the second passage 22, and is used to allow the low-temperature heat storage medium to flow back into the third passage 31. A water inlet is provided at one end of the fourth passage 32, and the water inlet is used to allow desalted water to flow in. A steam outlet is provided at the other end of the fourth passage 32. The third passage 31 is coupled to the fourth passage 32, and is used to heat the desalted water in the fourth passage 32, so that the desalted water is converted into steam for output.

[0076] like Figure 1 and Figure 3 As shown, in this embodiment, the second passage 22 is connected to the third passage 31 to form a closed loop, that is, a high-pressure water cycle. The heat storage medium (i.e., high-pressure water) can circulate between the second passage 22 and the third passage 31. Specifically, low-temperature and high-pressure water enters the second passage 22 from the low-temperature medium inlet, and the first heater 201 and the second heater 205 are used to exchange heat between the main steam in the first passage 21 and the low-temperature and high-pressure water in the second passage 22 to obtain high-temperature and high-pressure water. The high-temperature water tank 202 in the second passage 22 is used to temporarily store high-temperature and high-pressure water. The flow rate of high-temperature and high-pressure water entering the third passage 31 from the high-temperature water tank 202 is controlled by the second regulating valve 5, thereby adjusting the output of the steam produced by the heat release component 3.

[0077] There is a heat exchange relationship between the third passage 31 and the fourth passage 32. The high-temperature and high-pressure water exchanges heat with the desalted water in the fourth passage 32, causing the desalted water to boil, thereby generating steam output. After the heat energy of the high-temperature and high-pressure water is transferred to the desalted water, the high-temperature and high-pressure water is cooled to low-temperature and high-pressure water, and flows back to the second passage 22 for heating.

[0078] The second passage 22 is connected to the third passage 31, and heat is exchanged with the fourth passage 32 through the third passage 31. This has the advantage of enabling cyclic heat conduction of the heat storage medium, that is, the heat storage medium can continuously transfer heat in the main steam to the desalted water.

[0079] Further, the heat release component 3 also includes a steam generating device 33, the third passage 31 is coupled to the fourth passage 32 through the steam generating device 33, the steam generating device 33 is provided with a hot side and a cold side, and the hot side and the cold side of the steam generating device 33 are connected through a heat exchange surface. The third passage 31 is connected to the hot side of the steam generating device 33, so that the high-temperature heat storage medium flows through the hot side of the steam generating device 33, and the fourth passage 32 is connected to the cold side of the steam generating device 33, so that the desalted water flows through the cold side of the steam generating device 33. When the high-temperature heat storage medium in the third passage 31 enters the hot side of the steam generating device 33, it can heat the desalted water in the cold side of the steam generating device 33 to generate steam.

[0080] Specifically, the steam generating device 33 includes a primary preheater 312, a secondary preheater 315, and a heat exchange evaporator 316. The primary preheater 312 is provided with a third hot side and a third cold side, the secondary preheater 315 is provided with a fourth hot side and a fourth cold side, and the heat exchange evaporator 316 is provided with a fifth hot side and a fifth cold side. The heat exchange surface of the steam generating device 33 includes a third heat exchange surface, a fourth heat exchange surface, and a fifth heat exchange surface. The third hot side is thermally connected to the third cold side through the third heat exchange surface, the fourth hot side is thermally connected to the fourth cold side through the fourth heat exchange surface, and the fifth hot side is thermally connected to the fifth cold side through the fifth heat exchange surface.

[0081] like Figure 6 As shown, the third passage 31 is connected to the fifth hot side, the fourth hot side and the third hot side in sequence, so that the high-temperature heat storage medium can flow through the hot side of the heat exchange evaporator 316, the secondary preheater 315 and the primary preheater 312 in sequence; Figure 7 As shown, the fourth passage 32 is connected to the third cold side, the fourth cold side and the fifth cold side in sequence, so that the desalted water can flow through the primary preheater 312, the secondary preheater 315 and the cold side of the heat exchange evaporator 316 in sequence, and the flow direction of the high-temperature heat storage medium is opposite to the flow direction of the desalted water. When the high-temperature heat storage medium in the third passage 31 enters the hot side of the heat exchange evaporator 316, the desalted water in the cold side of the heat exchange evaporator 316 is heated to generate steam. When the high-temperature heat storage medium enters the hot side of the primary preheater 312 and the secondary preheater 315, the desalted water in the cold side of the preheating unit is preheated in the primary and secondary stages.

[0082] In other words, this embodiment proposes a heat storage and heat release system for a nuclear power unit, including: a primary circuit system of a nuclear power unit (i.e., a heat transfer circuit of a nuclear reactor 103), a secondary circuit system (i.e., the main steam cycle mentioned above), a heat storage system (i.e., an energy storage component) and a heat release system (i.e., a heat release component 3). The primary circuit system of a nuclear power unit is connected to the secondary circuit system, and the secondary circuit system is connected to the heat storage system, wherein the primary circuit is used to take out the heat of the reactor and transfer the heat to the secondary circuit main steam through the unit evaporator 104. The secondary circuit distributes the main steam to the steam turbine generator set and the heat storage system respectively through pipelines. The heat storage system is used to store excess heat from the nuclear power unit through high-temperature and high-pressure water during the peak load period of the nuclear power unit, and is connected to the heat release system to continuously provide heat for the heat release system. The heat release system uses the heat stored in the high-temperature and high-pressure water in the heat storage system to produce steam, and the generated steam is used for industrial steam supply or returned to the secondary circuit of the nuclear power unit for power generation.

[0083] A heat storage steam and condensate loop 102 connected to the heat storage system is added to the secondary loop system of the nuclear power unit. In addition to meeting the power generation needs of the steam turbine 6, the remaining main steam in the secondary loop enters the heat storage system as heat storage steam, exchanges heat with high-pressure water through a phase change heater and a drain heater, and the main steam condensate is returned to the conventional island system (i.e., the above-mentioned unit evaporator 104) through the condensate loop 102.

[0084] The heat storage system includes a phase change heater (i.e., the first heater 201 mentioned above), a high temperature water tank 202, a high temperature water tank regulator 212, a low temperature water tank 203, a low temperature water tank regulator 213, a heat storage circulation pump 204, and a drain heater (i.e., the second heater 205 mentioned above). The phase change heater is used to transfer the heat of the main steam of the secondary circuit to the high pressure water in the heat storage system, wherein the hot side is the main steam and the cold side is the high pressure water. The high temperature water tank 202 is used to store the high temperature and high pressure water heated by the phase change heater. The high temperature water tank regulator 212 can maintain the pressure balance during the water inlet and outlet process of the high temperature water tank 202. The low temperature water tank 203 is used to store the low temperature water after passing through the heat release system. The low temperature water tank regulator 213 can maintain the pressure balance during the water inlet and outlet process of the low temperature water tank 203. The heat storage circulation pump 204 can provide power for the operation of the heat storage circuit. The drain heater is used to further utilize the heat of the main steam drain of the secondary circuit to preliminarily heat the high-pressure water in the heat storage circuit. The hot side is the main steam drain and the cold side is high-pressure water. The heat storage system can use high-temperature water or molten salt as the heat storage medium. Due to the low steam parameters of the nuclear power unit and the low temperature of the heat storage medium, the high-temperature stability of the molten salt medium cannot play its advantages. Nuclear power heat storage requires a higher heat storage per unit volume, so high-temperature water is preferred as the heat storage medium.

[0085] The main steam drain refers to the water condensed after the main steam passes through the phase change heater (first heater 201). This drain further transfers heat to the three circuits through the drain heater (second heater 205). As long as the temperature of the drain is higher than that of the three circuits, it can ensure that the heat is transferred to the three circuits, which belongs to the cascade utilization of the main steam heat and uses up the energy as much as possible.

[0086] The heat storage system (i.e. the above-mentioned heat storage regulating component 2) is provided with dedicated regulating valves (including the above-mentioned first regulating valve 4 and second regulating valve 5) and isolation valves, which can control the heat storage amount of the heat storage system according to the peak regulation needs of the unit, and control the heat release amount from the heat storage system to the heat release system according to the needs of the users of the heat release system.

[0087] The heat release system (i.e. the heat release component 3) is provided with a complete set of steam production devices (i.e. the steam generation equipment 33), including: a desalted water replenishment branch 301, a secondary circuit feed water branch 302, a primary feed water pump 311, a primary preheater 312, a deaerator 313, a secondary feed water pump 314, a secondary preheater 315, a heat exchange evaporator 316, and a superheater 317. The desalted water replenishment or secondary circuit feed water is pressurized by the primary feed water pump 311 and enters the primary preheater 312 for preheating. The preheated water reaches a temperature close to that of saturated water after being deoxygenated by the deaerator 313, pressurized by the secondary feed water pump 314, and heated by the secondary preheater 315. It is heated and vaporized into steam by the heat exchange evaporator 316, and reaches the required steam parameters after passing through the superheater 317, and is used for industrial steam supply or returned to the secondary circuit of the nuclear power unit for power generation.

[0088] There are three forms of water vapor: wet steam, saturated steam and superheated steam. Wet steam can be understood as steam that carries a certain proportion of water. Saturated steam does not contain water. Superheated steam is a state in which saturated steam is further heated to a certain degree of superheat. To supply industrial steam to the outside, superheated steam must be used. Otherwise, once heat loss occurs during transportation, water will condense, which will endanger pipeline safety. The purpose of setting up a superheater is to continue to heat saturated steam into superheated steam. Even if there is heat loss, no condensed water will appear in the steam.

[0089] The heat release system can use feed water to generate industrial steam for industrial heating, or it can use the feed water of the secondary circuit of the nuclear power unit to generate steam and then return it to the unit to generate electricity, thus realizing diversified utilization of stored heat.

[0090] In summary, the energy storage peak-shaving device in this embodiment can solve the safety and economic problems when existing nuclear power units participate in power grid peak-shaving.

[0091] The following is a description of the overall working process of this energy storage peak-shaving device:

[0092] Firstly, the energy storage peak regulation device includes a power generation unit 1, a heat storage and regulation component 2 and a heat release component 3.

[0093] Among them, the power generation unit 1 (i.e., the primary and secondary loop systems of the nuclear power unit) includes the unit evaporator 104 (i.e., the above-mentioned heat source equipment, the unit evaporator 104 is connected to the nuclear reactor 103), the primary loop, and the secondary loop. The unit evaporator 104 is provided with a hot side pipeline and a cold side pipeline. The cold side medium of the unit evaporator 104 surrounds the hot side medium to realize heat exchange between the hot side and the cold side. The cold side pipeline is filled with a heat transfer medium (condensed water). The reactor is provided with a coolant outlet and a reflux port. The coolant outlet of the reactor is connected to the reflux port through a primary loop to realize the external circulation flow of the reactor coolant. The middle part of the primary loop is connected to the hot side pipeline of the unit evaporator 104, which is used to input the high-temperature coolant generated by the reactor into the hot side pipeline, thereby heating the heat transfer medium in the cold side pipeline of the unit evaporator 104, thereby generating main steam. The high-temperature coolant condenses into low-temperature coolant after heat exchange with the cold-side pipe in the unit evaporator 104, and the coolant flows back to the pipeline inside the reactor, completing a cycle. As the reactor continues to generate heat, the coolant in the primary circuit will continue to circulate between high and low temperatures, thereby continuously transferring heat to the heat transfer medium in the secondary circuit.

[0094] A first circulation pump is provided on the primary circuit, and a second circulation pump is provided on the secondary circuit. The first circulation pump is used to realize the circulation flow of high-temperature steam and coolant in the primary circuit. The second circulation pump is used to realize the circulation flow of main steam and heat transfer medium in the secondary circuit.

[0095] The cold side pipe of the unit evaporator 104 is connected to the secondary circuit to realize the external circulation flow of the heat transfer medium in the cold side pipe. Specifically, one end of the secondary circuit is connected to the outlet of the cold side pipe, and the other end is connected to the inlet of the cold side pipe. The secondary circuit is also connected to the steam turbine 6 and the heat storage regulating component 2. After the high-temperature coolant in the hot side pipe exchanges heat with the heat transfer medium in the cold side pipe, the heat transfer medium is converted into main steam, and the main steam flows through the secondary circuit. A part of the main steam drives the steam turbine 6 to generate electricity, and the other part of the main steam exchanges heat with the heat storage medium in the heat storage regulating component 2. A part of the heat energy in the main steam is converted into the kinetic energy of the steam turbine 6 and condensed into the first condensate, and the other part of the heat energy in the main steam is condensed into the second condensate after heat exchange with the heat storage medium. The first condensate and the second condensate flow back to the cold side pipe to supplement the heat transfer medium in the cold side pipe.

[0096] Further, the secondary circuit includes a heat storage steam circuit 101 (i.e., the above-mentioned connecting pipe) and a condensate circuit 102. The connecting pipe includes a main pipeline, a first branch and a second branch. One end of the main pipeline is connected to the outlet of the cold side pipeline, and the outlet of the cold side pipeline is used to output the main steam; the other end of the main pipeline is connected to the first branch and the second branch. The steam turbine 6 is provided with a steam input port and a condensate outlet. The first branch is connected to the steam input port of the steam turbine 6, and is used to deliver the main steam to the steam turbine 6. The main steam in the first branch drives the steam turbine 6 to generate electricity and then condenses into the first condensate. The condensate outlet of the steam turbine 6 is connected to the cold side pipeline of the unit evaporator 104 through the condensate circuit 102 to form a closed loop (the closed loop is a loop, i.e., the first sub-cycle of the above-mentioned main steam cycle), and the first condensate flows back to the inlet of the cold side pipeline of the unit evaporator 104 through the condensate circuit 102 to realize the circulation of the heat transfer medium and the main steam.

[0097] The second branch is connected to the main steam inlet of the heat storage regulating assembly 2, and is used to transport the main steam that exceeds the requirement of the steam turbine 6 to the heat storage regulating assembly 2, so that the heat in the main steam is stored in the heat storage regulating assembly 2. After the main steam exchanges heat with the heat storage medium in the heat storage regulating assembly 2, the main steam condenses into the second condensate. The condensate outlet of the heat storage regulating assembly 2 is connected to the cold side pipeline of the unit evaporator 104 through the condensate loop 102, and the second condensate also flows back to the inlet of the cold side pipeline of the unit evaporator 104 through the condensate loop 102 to realize further circulation of the heat transfer medium (condensate) and the main steam.

[0098] The heat storage regulating unit (i.e., heat storage system) includes a first passage 21 and a second passage 22, a phase change heater (i.e., the first heater 201) and a drain heater (i.e., the second heater 205), a high temperature water tank 202, a high temperature water tank regulator 212, a low temperature water tank 203, and a low temperature water tank regulator 213. Among them, a first hot side pipe and a first cold side pipe are arranged in the phase change heater, and the first hot side pipe surrounds the first cold side pipe to realize heat exchange between the first hot side pipe and the first cold side pipe. A second hot side pipe and a second cold side pipe are arranged in the drain heater. The second hot side pipe surrounds the second cold side pipe to realize heat exchange between the second hot side pipe and the second cold side pipe. The first passage 21 is connected to the first hot side pipe and the second hot side pipe in sequence, and the first passage 21 is connected in series to the above-mentioned second branch and the condensate circuit 102 to form a closed circuit (the closed circuit is the second circuit, i.e., the second sub-circulation of the above-mentioned main steam cycle), and the first passage 21 is used for the main steam output from the second branch to flow through. Specifically, the second branch includes an input pipe section (i.e., a heat storage steam pipe section) and a return pipe section (i.e., a condensate loop 102). The input pipe section is located between the main pipeline of the secondary loop and the phase change heater, one end of which is connected to the main pipeline of the secondary loop, and the other end is connected to the inlet end of the first passage 21 (i.e., the inlet of the first cold side pipe); the return pipe section is located between the inlet of the first cold side pipe and the drain heater, one end of which is connected to the inlet of the first cold side pipe, and the other end is connected to the outlet end of the first passage 21 (i.e., the outlet of the second cold side pipe).

[0099] A first regulating valve 4 is provided at the main steam inlet of the first passage 21 , and the first regulating valve 4 is used to adjust the opening of the first passage 21 , thereby controlling the flow of the main steam entering the first passage 21 .

[0100] The second passage 22 is connected to the first cold side pipe and the second cold side pipe in sequence, and the second passage 22 is connected in series to the heat release component 3, and the second passage 22 is filled with a heat storage medium. Specifically, one end (the outlet end) of the second passage 22 is connected to the inlet of the heat release component 3, and the other end (the inlet end) is connected to the outlet of the heat release component 3 to form a closed loop for realizing the circulation of the heat storage medium. The main steam in the first hot side pipe heats the heat storage medium in the first cold side pipe, so that the heat storage medium is converted into a high-temperature heat storage medium (i.e., high-temperature and high-pressure water), that is, the transfer of heat energy is completed. After the high-temperature heat storage medium enters the heat release component 3, it drives the heat release component 3 to generate steam. After the heat energy transfer is completed, the high-temperature heat storage medium is converted back into a low-temperature medium (i.e., low-temperature and high-pressure water). The low-temperature medium flows back to the second passage 22. When the low-temperature medium flows through the second cold side pipe of the drain heater (i.e., the drain heater), the drain main steam in the second hot side pipe and the low-temperature medium in the second cold side pipe are preheated to obtain a preliminarily heated heat storage medium. In other words, the drain heater is used to further utilize the heat of the main steam drain in the secondary circuit to preliminarily heat the high-pressure water in the heat storage circuit, with the hot side being the main steam drain and the cold side being the high-pressure water.

[0101] Further, the high-temperature water tank 202 is located between the outlet of the first cold side pipe and the inlet of the heat release component 3, the outlet of the first cold side pipe is connected to the inlet of the heat release component 3 through the high-temperature water tank 202, and the high-temperature heat storage medium flows into the high-temperature water tank 202 for storage, thereby realizing the storage of thermal energy. The high-temperature water tank regulator 212 is connected to the high-temperature water tank 202, which can maintain the pressure balance during the water inlet and outlet of the high-temperature water tank 202. The low-temperature water tank 203 is located between the inlet of the second cold side pipe and the outlet of the heat release component 3, the outlet of the heat release component 3 is connected to the inlet of the second cold side pipe through the low-temperature water tank 203, and the low-temperature medium flows into the low-temperature water tank 203 for storage. The low-temperature water tank regulator 213 is connected to the low-temperature water tank 203, which can maintain the pressure balance during the water inlet and outlet of the low-temperature water tank 203.

[0102] A second regulating valve 5 is provided between the outlet of the high-temperature water tank 202 and the inlet of the heat release component 3 , and the second regulating valve 5 is used to control the flow rate of the high-temperature and high-pressure water entering the heat release component 3 .

[0103] A heat storage circulation pump 204 is provided between the outlet of the low-temperature water tank 203 and the second cold-side pipeline. The heat storage circulation pump 204 is used to circulate the heat storage medium in the second passage 22 and the third passage 31 .

[0104] The heat release component 3 (i.e., the heat release system) includes a third passage 31, a fourth passage 32, a desalted water replenishment branch 301, a secondary circuit water supply branch 302, a primary water supply pump 311, a primary preheater 312, a deaerator 313, a secondary water supply pump 314, a secondary preheater 315, a second evaporator, and a superheater 317. Specifically, the primary preheater 312, the secondary preheater 315, the second evaporator, and the superheater 317 all include hot side pipes and cold side pipes. The hot side pipe surrounds the cold side pipe and is used for heat exchange with the cold side pipe. Among them, the third passage 31 is connected to the hot side pipes of the primary preheater 312, the secondary preheater 315, the second evaporator, and the superheater 317 in sequence; the fourth passage 32 is connected to the cold side pipes of the primary preheater 312, the secondary preheater 315, the second evaporator, and the superheater 317 in sequence.

[0105] The inlet end of the third passage 31 is connected to the outlet end of the second passage 22, and the outlet end of the third passage 31 is connected to the inlet end of the second passage 22 to form a closed loop (the closed loop is the high-pressure water cycle mentioned above) for realizing the circulation of the heat storage medium. The inlet end of the fourth passage 32 (i.e. the water inlet mentioned above) is connected to the desalted water replenishment branch 301 and the secondary circuit water supply branch 302. The desalted water replenishment branch 301 is used to access the desalted water, and the secondary circuit water supply branch 302 is connected to the condensate water circuit 102 of the secondary circuit, and is used to pass condensate into the fourth passage 32 when the desalted water in the fourth passage 32 is insufficient. The outlet end of the fourth passage 32 (i.e. the steam outlet mentioned above) is provided with an industrial steam branch 321 and a heat recovery steam branch 322. The industrial steam branch 321 is used to provide steam to the outside (for example: chemical park, etc.), and the heat recovery steam branch 322 is connected to the secondary circuit, and is used to provide supplementary steam when the steam in the secondary circuit is insufficient. Furthermore, the deaerator 313 is connected in series to the fourth passage 32, and the deaerator 313 is used to eliminate excess oxygen in the desalted water. The outlet end of the fourth passage 32 is also provided with a superheated steam branch, which is connected to the deaerator 313. The steam generated by the superheater 317 can be introduced into the deaerator 313, and the heat of the steam can be used to heat the feed water in the deaerator 313, thereby improving the overall thermal efficiency of the system. This heat recovery helps to reduce energy consumption.

[0106] The first-level feed water pump 311 is located at the inlet end of the fourth passage 32, and is used to pump desalted water so that the desalted water can flow along the fourth passage 32. The second-level feed water pump 314 is located between the cold side pipes of the deaerator 313 and the second-level preheater 315. The second-level feed water pump 314 is used to further pump the desalted water so that the desalted water flows along the fourth passage 32, and finally generates steam after being heated by the hot side pipes of the first-level preheater 312, the second-level preheater 315, the second evaporator, and the superheater 317.

[0107] The heat storage and heat release system of the nuclear power unit in this embodiment can produce the following benefits:

[0108] (1) The heat storage system is combined with the peak load regulation of nuclear power units and industrial steam supply to enable the nuclear power units to have thermal-electric decoupling capabilities. The energy storage for power generation can be reduced during the trough of the power grid, and the stored energy can be released during the peak period to be used for industrial steam or to increase the power generation capacity of the unit. The load adaptability of the nuclear power unit is improved, achieving "peak shaving and valley filling", which improves the economic efficiency of the nuclear power unit.

[0109] (2) Regardless of peak load regulation, energy supply or pure power generation, the reactor can maintain its power without reducing its reactor power. The steam turbine and heat storage system can be used to adjust and match the reactor power, thereby improving reactor safety.

[0110] (3) The existence of the heat storage system changes the connection between the reactor and the power generation system and the energy supply system from a "rigid connection" to a "flexible connection". In the event of load shedding in the energy supply system, load shedding in the power grid, or tripping of turbine 6, the heat storage system can be used to balance the reactor power and reduce the transient conditions of the reactor. In the event of a reactor accident, the power can be reduced or the reactor can be shut down to ensure the stable steam supply of the energy supply system and the safety of heat users, thus greatly improving the safety and reliability of the combined heat and power supply of the nuclear power unit.

[0111] (4) The heat storage system can be used as an intermediate isolation loop for the nuclear power unit to supply industrial steam, fundamentally solving the problem of the secondary loop pressure being higher than the industrial steam side pressure in conventional nuclear energy steam supply projects.

[0112] Example 2

[0113] The present invention further discloses a nuclear power generation steam supply system, comprising a nuclear reactor 103 and the energy storage peak regulation device in Example 1.

[0114] Among them, the nuclear reactor 103 is connected to the heat source equipment of the energy storage peak-shaving device, and is used to output heat energy to the heat source equipment to generate main steam. The heat storage and regulation component 2 in the energy storage peak-shaving device is used to receive and store the heat energy of the main steam, and can output heat energy to the heat release component 3. The heat release component 3 is used to convert the received heat energy into steam output.

[0115] This embodiment provides a heat storage and heat release system for a nuclear power unit, including a primary circuit and a secondary circuit system of the nuclear power unit, a heat storage system, and a heat release system.

[0116] The primary and secondary circuit systems of nuclear power units are connected to the heat storage system, where the primary circuit is used to take out the heat from the reactor and transfer the heat to the secondary circuit main steam through the evaporator. The secondary circuit distributes the main steam to the steam turbine generator set and the heat storage system through pipelines; the heat storage system is used to store excess heat from the nuclear power unit through high-temperature and high-pressure water during the peak load period of the nuclear power unit, and is connected to the heat release system to continuously provide heat for the heat release system; the heat release system uses the heat stored in the high-temperature and high-pressure water in the heat storage system to produce steam, and the generated steam is used for industrial steam supply or returned to the secondary circuit of the nuclear power unit for power generation.

[0117] Specifically, for the primary and secondary loop systems of the nuclear power unit, a heat storage steam and condensate loop 102 connected to the heat storage system is added to the secondary loop system. In addition to meeting the power generation needs of the steam turbine 6, the remaining main steam of the secondary loop enters the heat storage system as heat storage steam, exchanges heat with high-pressure water through a phase change heater and a drain heater, and the main steam condensate returns to the conventional island system through the condensate loop 102.

[0118] The heat storage system includes a phase change heater, a high temperature water tank 202, a high temperature water tank regulator 212, a low temperature water tank 203, a low temperature water tank regulator 213, a heat storage circulation pump 204, and a drain heater. The phase change heater is used to transfer the heat of the main steam of the secondary circuit to the high pressure water in the heat storage system, wherein the hot side is the main steam and the cold side is the high pressure water. The high temperature water tank 202 is used to store the high temperature and high pressure water heated by the phase change heater. The high temperature water tank regulator 212 can maintain the pressure balance during the water inlet and outlet of the high temperature water tank 202. The low temperature water tank 203 is used to store the low temperature water after passing through the heat release system. The low temperature water tank regulator 213 can maintain the pressure balance during the water inlet and outlet of the low temperature water tank 203. The heat storage circulation pump 204 can provide power for the operation of the heat storage circuit. The drain heater is used to further utilize the heat of the main steam drain of the secondary circuit to preliminarily heat the high pressure water in the heat storage circuit, wherein the hot side is the main steam drain and the cold side is the high pressure water.

[0119] Specifically, the heat storage system can use high-temperature water or molten salt as the heat storage medium. Since the steam parameters of the nuclear power unit are low and the temperature of the heat storage medium is low, the high-temperature stability of the molten salt medium cannot play its advantages. Nuclear power heat storage requires storing more heat per unit volume. Therefore, high-temperature water is preferred as the heat storage medium.

[0120] Specifically, the heat storage system is provided with a dedicated regulating valve and an isolation valve, which can control the amount of heat stored in the heat storage system according to the peak-shaving needs of the unit, and control the amount of heat released from the heat storage system to the heat release system according to the needs of the users of the heat release system.

[0121] The heat release system is provided with a complete set of steam production equipment, including: desalted water makeup branch 301, secondary circuit feed water branch 302, primary feed water pump 311, primary preheater 312, deaerator 313, secondary feed water pump 314, secondary preheater 315, evaporator (heat exchange evaporator 316), superheater 317. Desalted water makeup or secondary circuit feed water is pressurized by primary feed water pump 311 and enters primary preheater 312 for preheating. The preheated water reaches a temperature close to saturated water after being deoxygenated by deaerator 313, pressurized by secondary feed water pump 314, and heated by secondary preheater 315. It is heated and vaporized into steam by evaporator, and reaches the required steam parameters after passing through superheater 317, which is used for industrial steam supply or returned to the secondary circuit of nuclear power unit for power generation.

[0122] Specifically, the heat release system can use the feed water to generate industrial steam, which is used for industrial heating through the industrial steam branch 321. It can also use the feed water of the secondary circuit of the nuclear power unit to generate heat recovery steam, which is returned to the unit for power generation through the heat recovery steam branch 322, thereby realizing diversified utilization of stored heat.

[0123] The heat storage and release system of the nuclear power unit in this embodiment couples nuclear power peak regulation with nuclear energy steam supply through the heat storage system, thereby solving the reactor safety problem faced by nuclear power participating in grid peak regulation. At the same time, the stored heat is used to realize industrial heating or heat recovery power generation, thereby improving the economy of the nuclear power unit.

[0124] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, but the present invention is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. An energy storage peak-shaving device, characterized in that: include: A power generation unit (1), a heat storage and regulation component (2) and a heat release component (3); The power generation unit (1) comprises a heat source device and a steam turbine (6), wherein the heat source device is connected to the steam turbine (6), and the heat source device is used to produce main steam to drive the steam turbine (6) to discharge; The heat storage and regulation component (2) is located between the power generation unit (1) and the heat release component (3), and one end of the heat storage and regulation component (2) is connected to the heat source device, and is used to receive the main steam generated by the heat source device that exceeds the requirements of the steam turbine (6), and store the heat in the main steam; The other end of the heat storage and regulation component (2) is connected to the heat release component (3) for outputting heat energy to the heat release component (3); the heat release component (3) is used to convert the received heat energy into steam output.

2. The device according to claim 1, characterized in that The heat storage regulating component (2) comprises a heat storage unit, the heat storage unit comprising a first passage (21) and a second passage (22), the first passage (21) of the heat storage unit being in communication with the heat source device and being used for receiving main steam output by the heat source device, the second passage (22) being filled with a heat storage medium, the first passage (21) being coupled to the second passage (22) and being used for heating the heat storage medium by the main steam, the second passage (22) being in communication with the heat releasing component (3) and being used for outputting the heated high-temperature heat storage medium to the heat releasing component (3), thereby outputting heat energy to the heat releasing component (3).

3. The device according to claim 2, characterized in that The heat storage unit is provided with a main steam inlet and a condensate outlet, wherein the main steam inlet and the condensate outlet are connected via a first passage (21). The heat source device is provided with a main steam outlet and a condensate return port, the main steam outlet is communicated with the main steam inlet, and the condensate outlet is communicated with the condensate return port. The main steam output by the heat source device that exceeds the requirement of the steam turbine (6) enters the heat storage unit, and after heat exchange with the heat storage medium in the heat storage unit, is condensed into condensate, and the condensate is refluxed into the heat source device via the condensate outlet and the condensate return port to carry out the next steam cycle.

4. The device according to claim 3, characterized in that The heat storage unit is further provided with a high-temperature medium outlet and a low-temperature medium inlet, the low-temperature medium inlet and the high-temperature medium outlet are connected via a second passage (22), the heat release component (3) is provided with a high-temperature medium inlet and a low-temperature medium outlet, the low-temperature medium outlet is connected to the low-temperature medium inlet, and the high-temperature medium outlet is connected to the high-temperature medium inlet. The low-temperature heat storage medium enters the second passage (22) through the low-temperature medium inlet, the main steam in the first passage (21) heats the low-temperature heat storage medium in the second passage (22), and the low-temperature heat storage medium is converted into a high-temperature heat storage medium, and the high-temperature heat storage medium enters the heat release component (3) through the high-temperature medium outlet and the high-temperature medium inlet. After the heat release component (3) converts the received heat energy of the high-temperature heat storage medium into steam output, the high-temperature heat storage medium is converted back into a low-temperature heat storage medium and flows back into the second passage (22) via the low-temperature medium outlet and the low-temperature medium inlet for the next cycle.

5. The device according to claim 4, characterized in that The heat storage unit comprises a heat exchange device, the first passage (21) is coupled to the second passage (22) via the heat exchange device, the heat exchange device is provided with a hot side and a cold side, and the hot side and the cold side of the heat exchange device are connected via a heat exchange surface; The first passage (21) is connected to the hot side of the heat exchange device, so that the main steam flows through the hot side of the heat exchange device, and the second passage (22) is connected to the cold side of the heat exchange device, so that the heat storage medium flows through the cold side of the heat exchange device; When the main steam enters the hot side of the heat exchange device, it heats the heat storage medium in the cold side of the heat exchange device, thereby converting the heat storage medium into a high-temperature heat storage medium.

6. The device according to claim 5, characterized in that The heat exchange device comprises a first heater (201) and a second heater (205); the first passage (21) is coupled to the second passage (22) via the first heater (201) and the second heater (205); the first heater (201) is provided with a first hot side and a first cold side; the second heater (205) is provided with a second hot side and a second cold side; the heat exchange surface of the heat exchange device comprises a first heat exchange surface and a second heat exchange surface; the first hot side is connected to the first cold side via the first heat exchange surface; and the second hot side is connected to the second cold side via the second heat exchange surface; The first passage (21) is connected in sequence with the hot side of the first heater (201) and the hot side of the second heater (205), so that the main steam flows through the hot side of the first heater (201) and the hot side of the second heater (205) in sequence; the second passage (22) is connected in sequence with the second heater (205) and the cold side of the cold side of the first heater (201), so that the heat storage medium flows through the cold side of the second heater (205) and the cold side of the first heater (201) in sequence; and the flow direction of the main steam is opposite to the flow direction of the heat storage medium; When the main steam in the first passage (21) enters the hot side of the first heater (201), the heat storage medium in the cold side of the first heater (201) is heated, thereby converting the heat storage medium into a high-temperature heat storage medium; when the main steam enters the hot side of the second heater (205), the heat storage medium in the cold side of the second heater (205) is preheated.

7. The device according to claim 6, characterized in that The hot side of the first heater (201) is set as a first hot side pipe, and the cold side of the first heater (201) is set as a first cold side pipe, the first hot side pipe surrounds the first cold side pipe, and the first heat exchange surface is located between the first hot side pipe and the first cold side pipe, and is used for heat exchange between the first hot side pipe and the first cold side pipe; The hot side of the second heater (205) is set as a second hot side pipe, and the cold side of the second heater (205) is set as a second cold side pipe. The second hot side pipe surrounds the second cold side pipe, and the second heat exchange surface is located between the second hot side pipe and the second cold side pipe, and is used for heat exchange between the second hot side pipe and the second cold side pipe.

8. The device according to claim 5, 6 or 7, characterized in that The heat storage unit further comprises a high-temperature water tank (202) and a low-temperature water tank (203); the high-temperature water tank (202) is located between the cold side outlet of the heat exchange device and the high-temperature medium inlet of the heat release component (3); the high-temperature water tank (202) is used to temporarily store the high-temperature heat storage medium; the low-temperature water tank (203) is located between the cold side inlet of the heat exchange device and the low-temperature medium outlet of the heat release component (3); the low-temperature water tank (203) is used to temporarily store the low-temperature heat storage medium.

9. The device according to claim 2, characterized in that The heat storage regulating device further comprises a regulating unit, which is connected to the heat storage unit and is used to control the input of main steam on the first passage (21) and to control the output of high-temperature heat storage medium on the second passage (22).

10. The device according to claim 9, characterized in that The regulating unit comprises a first regulating valve (4), a second regulating valve (5) and a controller; The first regulating valve (4) is installed on the first passage (21) and is used to adjust the opening of the first passage (21); the second regulating valve (5) is installed on the second passage (22) and is used to adjust the opening of the second passage (22); The controller is electrically connected to the first regulating valve (4) and the second regulating valve (5) respectively, and the controller is preset with power generation demand information of the steam turbine (6) and steam output demand information of the heat release component (3); The controller is used to adjust the opening of the first regulating valve (4) according to the power generation demand information of the steam turbine (6), thereby controlling the input amount of main steam on the first passage (21); The controller is also used to adjust the opening of the second regulating valve (5) according to the steam output demand information of the heat release component (3), thereby controlling the output of the high-temperature heat storage medium on the second passage (22).

11. The device according to claim 10, characterized in that The first regulating valve (4) is located at the main steam inlet of the first passage (21), and the second regulating valve (5) is located at the high-temperature medium outlet of the second passage (22). The controller is used to control the opening of the first regulating valve (4) to decrease when the power generation demand of the steam turbine (6) increases, or to control the opening of the first regulating valve (4) to increase when the power generation demand of the steam turbine (6) decreases; The controller is also used to control the opening of the second regulating valve (5) to increase when the steam output demand of the thermal component increases, or to control the opening of the second regulating valve (5) to decrease when the steam output demand of the thermal component decreases.

12. The device according to claim 2, characterized in that The heat release component (3) comprises a third passage (31) and a fourth passage (32); the heat release component (3) is provided with a high-temperature medium inlet and a low-temperature medium outlet, the high-temperature medium inlet and the low-temperature medium outlet are connected via the third passage (31); the heat storage unit is provided with a high-temperature medium outlet and a low-temperature medium inlet, the high-temperature medium outlet and the low-temperature medium inlet are connected via the second passage (22); The high-temperature medium inlet of the third passage (31) is connected to the high-temperature medium outlet of the second passage (22) for receiving the high-temperature heat storage medium output by the second passage (22); the low-temperature medium outlet of the third passage (31) is connected to the low-temperature medium outlet of the second passage (22) for supplying the low-temperature heat storage medium back to the third passage (31); A water inlet is provided at one end of the fourth passage (32) for allowing desalted water to flow in, and a steam outlet is provided at the other end of the fourth passage (32). The third passage (31) is coupled to the fourth passage (32) and is used to heat the desalted water in the fourth passage (32) so that the desalted water is converted into steam for output.

13. The device according to claim 12, characterized in that The heat release component (3) further comprises a steam generating device (33), the third passage (31) is coupled to the fourth passage (32) via the steam generating device (33), the steam generating device (33) is provided with a hot side and a cold side, and the hot side and the cold side of the steam generating device (33) are connected via a heat exchange surface; The third passage (31) is in communication with the hot side of the steam generating device (33), so that the high-temperature heat storage medium flows through the hot side of the steam generating device (33); the fourth passage (32) is in communication with the cold side of the steam generating device (33), so that the desalted water flows through the cold side of the steam generating device; When the high-temperature heat storage medium in the third passage (31) enters the hot side of the steam generating device (33), it can heat the desalted water in the cold side of the steam generating device (33) to generate steam.

14. A nuclear power generation steam supply system, characterized in that: Comprising a nuclear reactor and the energy storage peak shaving device according to any one of claims 1 to 13; The nuclear reactor is connected to the heat source equipment of the energy storage peak-shaving device and is used to output heat energy to the heat source equipment to generate main steam. The heat storage and regulation component (2) in the energy storage peak-shaving device is used to receive and store the heat energy of the main steam and can output heat energy to the heat release component (3). The heat release component (3) is used to convert the received heat energy into steam output.

Images