A nuclear power replacement thermal power transformation method and generator set taking into account peak-shaving and heating

Abstract

The present invention relates to the field of thermal power transformation technology, and in particular to a nuclear power replacement thermal power transformation method and a generator set that take into account peak-shaving and heat supply. The nuclear power replacement thermal power transformation method that takes into account peak-shaving and heat supply includes: using a steam-molten salt heat exchanger to store the steam heat of the nuclear island steam generator into the molten salt of a first molten salt component; using a heat exchange component to heat the feed water of the water supply pipe with the molten salt heat of the first molten salt component to generate steam, so that the steam drives the steam turbine; using a hydrophobic molten salt heat exchanger to store the hydrophobic heat of the steam-molten salt heat exchanger into the molten salt of a second molten salt component; and using a heating heater to transfer the molten salt heat of the second molten salt component to the heating primary network pipeline. The above technical solution can solve the peak-shaving capacity mismatch problem in the process of thermal power conversion to nuclear power.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power transformation, and in particular to a nuclear power replacement thermal power transformation method and a generator set that takes peak load regulation and heat supply into consideration. Background Art

[0002] Building a new power system is a key step for China to achieve its carbon neutrality goals. Achieving an orderly phase-out of thermal power generation while ensuring safe and reliable substitution with renewable energy sources is a key challenge. China's power system is characterized by a large thermal power stock, a high proportion of power generation, and high carbon emissions, posing a critical challenge to reducing carbon emissions from thermal power.

[0003] Current carbon reduction measures for thermal power plants include early retirement and reducing direct emissions through carbon capture systems. Retrofitting thermal power units with low-carbon technologies, such as nuclear power, is also an explorable path. From a functional perspective, both nuclear and thermal power can serve as baseload power sources. From a resource utilization perspective, the rigid retirement of thermal power plants with a long remaining lifespan leads to high overall costs for decommissioning and dismantling existing thermal power plants. Therefore, retrofitting thermal power plants with nuclear power can leverage existing resources, such as grid access systems, water sources, land, transmission facilities, and some process equipment and infrastructure, thereby reducing overall plant costs.

[0004] However, frequent adjustments to nuclear power plant reactor loads can cause fluctuations in reactor status, posing operational safety risks. Due to its inherent technical characteristics, nuclear power has far lower peak-shaving and frequency-regulating capabilities than thermal power plants, resulting in less flexibility. A significant number of my country's thermal power plants combine power generation with heat generation, operating according to the principle of generating electricity based on heat production. However, the majority of my country's nuclear power plants lack heat generation capabilities. Therefore, research is needed to develop a method for converting thermal power plants to nuclear power to address the mismatch between power generation and peak-shaving capabilities that often occurs during nuclear power conversion. Summary of the Invention

[0005] In order to solve the problem of peak-shaving capacity mismatch during the conversion of thermal power to nuclear power, an embodiment of the present invention provides a nuclear power replacement for thermal power conversion method and a generator set that takes into account peak-shaving and heat supply.

[0006] In a first aspect, an embodiment of the present invention provides a method for replacing thermal power with nuclear power while taking into account peak load regulation and heat supply, comprising:

[0007] The steam heat of the nuclear island steam generator is stored in the molten salt of the first molten salt assembly using a steam molten salt heat exchanger;

[0008] Using the heat exchange component to heat the feed water in the water supply pipe with the molten salt heat of the first molten salt component to generate steam, so that the steam drives the steam turbine to work;

[0009] Using a hydrophobic molten salt heat exchanger, the hydrophobic heat of the steam molten salt heat exchanger is stored in the molten salt of the second molten salt component;

[0010] The molten salt heat of the second molten salt component is transferred to the primary heating network pipeline by using a heating heater.

[0011] In the second aspect, an embodiment of the present invention provides a generator set that takes into account peak-shaving and heating, which is applied to the method described in the above embodiment, including a nuclear island steam generator, a steam molten salt heat exchanger, a hydrophobic molten salt heat exchanger, a first molten salt component, a second molten salt component, a heat exchange component, a water supply pipe, a steam turbine, a generator, a heating heater and a heating primary network pipe. The steam molten salt heat exchanger is respectively connected to the nuclear island steam generator and the first molten salt component, and is used to store the steam heat of the nuclear island steam generator in the molten salt of the first molten salt component. The hydrophobic molten salt heat exchanger is respectively connected to the steam molten salt heat exchanger and the second molten salt component, and is used to store the hydrophobic heat of the steam molten salt heat exchanger in the molten salt of the second molten salt component. The heat exchange component is respectively connected to the first molten salt component and the water supply pipe, the steam turbine is connected to the heat exchange component through a steam pipe, the steam turbine is connected to the generator, and the heating heater is respectively connected to the second molten salt component and the heating primary network pipe, and is used to transfer the molten salt heat of the second molten salt component to the heating primary network pipe.

[0012] The embodiment of the present invention provides a nuclear power replacement thermal power transformation method and a generator set that takes into account peak load regulation and heat supply. The heat of the steam in the secondary circuit of the nuclear island is stored in the first molten salt component (i.e., the molten salt in the high temperature zone) and the second molten salt component (i.e., the molten salt in the low temperature zone). Different molten salt heat absorption system powers and molten salt heat release system powers are matched and set according to the power of the nuclear island reactor and the power of the original thermal power steam turbine generator. The operation of the nuclear island reactor system and the operation of the steam turbine generator system can be decoupled. At the same time, by setting the low temperature zone molten salt energy storage system, the system can be supplied with heat to the outside. By decoupling, the reactor power can be different from the original thermal power steam turbine generator power, solving the power mismatch problem in the process of converting thermal power to nuclear power. By decoupling, the steam turbine generator power can be flexibly peak-regulated according to the requirements of the power grid, while the reactor power can remain unchanged, solving the peak load mismatch problem in the process of converting thermal power to nuclear power. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a flow chart of a method for replacing thermal power with nuclear power while taking into account peak load regulation and heat supply, provided by an embodiment of the present invention;

[0015] Figure 2 It is a schematic diagram of a nuclear power coupled with thermal power combined power generation unit provided by an embodiment of the present invention.

[0016] Reference numerals:

[0017] 1-Nuclear island steam generator; 2-Steam molten salt heat exchanger; 3-Drainage molten salt heat exchanger; 4-Feedwater pipeline; 5-Steam turbine; 6-Generator; 7-Heating heater; 8-Heating primary network pipeline; 9-High temperature zone hot salt tank; 10-High temperature zone hot salt pump; 11-High temperature zone cold salt tank; 12-High temperature zone cold salt pump; 13-First molten salt pipeline; 14-Second molten salt pipeline; 15-Molten salt electric heater; 16-Superheater; 17-Evaporator; 18-Preheater ; 19-reheater; 20-third molten salt pipeline; 21-thermal power main steam pipeline; 22-thermal power cold section pipeline; 23-thermal power hot section pipeline; 24-low temperature zone hot salt tank; 25-low temperature zone hot salt pump; 26-low temperature zone cold salt tank; 27-low temperature zone cold salt pump; 28-fourth molten salt pipeline; 29-fifth molten salt pipeline; 30-extraction steam feed water heat exchanger; 31-extraction steam pipeline; 32-thermal power feed water pump; 33-molten salt feed water heat exchanger; 34-nuclear island feed water pump. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] like Figure 1 and Figure 2 As shown, the embodiment of the present invention provides a method for replacing thermal power with nuclear power while taking into account peak load regulation and heat supply, including:

[0020] Step S1: using the steam molten salt heat exchanger 2 to store the steam heat of the nuclear island steam generator 1 into the molten salt of the first molten salt assembly;

[0021] Step S2: using the heat exchange component to heat the feed water in the water supply pipe 4 with the heat of the molten salt of the first molten salt component to generate steam, so that the steam drives the steam turbine 5 to work;

[0022] Step S3: using the hydrophobic molten salt heat exchanger 3 to store the hydrophobic heat of the steam molten salt heat exchanger 2 into the molten salt of the second molten salt assembly;

[0023] Step S4: Use the heating heater 7 to transfer the molten salt heat of the second molten salt component to the heating primary network pipe 8.

[0024] In this embodiment, the heat of the steam in the secondary circuit of the nuclear island is stored in the first molten salt component (i.e., the molten salt in the high temperature zone) and the second molten salt component (i.e., the molten salt in the low temperature zone), and different molten salt heat absorption system powers and molten salt heat release system powers are matched and set according to the power of the nuclear island reactor and the power of the original thermal power steam turbine generator, so that the operation of the nuclear island reactor system and the operation of the steam turbine generator system can be decoupled. At the same time, by setting up a molten salt energy storage system in the low temperature zone, the system can be supplied with heat to the outside. By decoupling, the power of the reactor can be different from the power of the original thermal power steam turbine generator, which solves the power mismatch problem in the process of converting thermal power to nuclear power. By decoupling, the power of the steam turbine generator can be flexibly peaked according to the requirements of the power grid, while the power of the reactor can remain unchanged, which solves the problem of mismatch in peak regulation capacity in the process of converting thermal power to nuclear power.

[0025] It should be noted that the aforementioned combined power generation units are the conversion of existing thermal power plants using nuclear power. A nuclear power plant primarily consists of a nuclear island reactor system, a conventional island steam turbine generator system, and plant-wide auxiliary systems. A thermal power plant primarily consists of a boiler system, a main building steam turbine generator system, and plant-wide auxiliary systems. Nuclear power conversion of a thermal power plant replaces the thermal unit's boiler system with a nuclear island reactor system to provide heat for the power plant, while reusing other components, such as the original thermal unit's steam turbine generator system, as much as possible. While utilizing the existing thermal power plant's grid access system to reduce overall plant costs, nuclear power conversion of a thermal power plant also requires the post-transformation plant to possess peak and frequency regulation capabilities matching those of the original thermal power plant, as well as a certain level of external heat supply capacity, to meet the grid's flexibility requirements and heat supply needs.

[0026] In one embodiment of the present invention, the first molten salt assembly includes a high temperature zone hot salt tank 9, a high temperature zone hot salt pump 10, a high temperature zone cold salt tank 11 and a high temperature zone cold salt pump 12, and the high temperature zone hot salt tank 9 and the high temperature zone cold salt tank 11 are connected by a first molten salt pipeline 13 and a second molten salt pipeline 14;

[0027] The steam heat of the nuclear island steam generator 1 is stored in the molten salt of the first molten salt assembly by using the steam molten salt heat exchanger 2, including:

[0028] The high-temperature zone cold salt pump 12 is used to supply the high-temperature zone cold molten salt in the high-temperature zone cold salt tank 11 to the high-temperature zone hot salt tank 9 through the first molten salt pipeline 13; wherein, the high-temperature zone cold molten salt absorbs the steam heat of the nuclear island steam generator 1 while passing through the first molten salt pipeline 13.

[0029] In one embodiment of the present invention, the first molten salt assembly further includes a molten salt electric heater 15, which is provided on the first molten salt pipeline 13 and is located between the steam molten salt heat exchanger 2 and the high temperature zone hot salt tank 9;

[0030] Also includes:

[0031] The molten salt flowing out of the steam molten salt heat exchanger 2 is further heated by the molten salt electric heater 15 .

[0032] In one embodiment of the present invention, the heat exchange assembly includes a superheater 16, an evaporator 17, and a preheater 18, which are sequentially arranged along the flow direction of the hot molten salt, and the preheater 18, the evaporator 17, and the superheater 16 are sequentially arranged along the flow direction of the feed water, and the outlet of the superheater 16 is connected to the steam turbine 5;

[0033] The heat exchange component is used to heat the water in the water supply pipe 4 with the heat of the molten salt of the first molten salt component to generate steam, including:

[0034] The feed water in the feed water pipe 4 is heated in sequence by the preheater 18 , the evaporator 17 and the superheater 16 to generate superheated steam.

[0035] In one embodiment of the present invention, the heat exchange assembly further includes a reheater 19, the second molten salt pipeline 14 is further connected in parallel with a third molten salt pipeline 20, the reheater 19 is arranged on the third molten salt pipeline 20, the steam turbine 5 includes a high-pressure cylinder and an intermediate-pressure cylinder, the outlet of the superheater 16 is connected to the inlet of the high-pressure cylinder through the thermal power main steam pipeline 21, the outlet of the high-pressure cylinder is connected to the inlet of the reheater 19 through the thermal power cold section pipeline 22, and the outlet of the reheater 19 is connected to the inlet of the intermediate-pressure cylinder through the thermal power hot section pipeline 23;

[0036] The heat exchange component is used to heat the water in the water supply pipe 4 with the heat of the molten salt of the first molten salt component to generate steam, including:

[0037] The exhaust steam of the high-pressure cylinder is reheated by the reheater 19 so that the generated steam enters the medium-pressure cylinder through the thermal power heating section pipeline 23.

[0038] In one embodiment of the present invention, the second molten salt assembly includes a low-temperature hot salt tank 24, a low-temperature hot salt pump 25, a low-temperature cold salt tank 26, and a low-temperature cold salt pump 27. The low-temperature hot salt tank 24 and the low-temperature cold salt tank 26 are connected by a fourth molten salt pipeline 28 and a fifth molten salt pipeline 29.

[0039] The hydrophobic molten salt heat exchanger 3 is used to store the hydrophobic heat of the steam molten salt heat exchanger 2 into the molten salt of the second molten salt component, including:

[0040] The low-temperature zone cold molten salt in the low-temperature zone cold salt tank 26 is supplied to the low-temperature zone hot salt tank 24 through the fourth molten salt pipeline 28 by the low-temperature zone cold salt pump 27; wherein, the low-temperature zone cold molten salt absorbs the hydrophobic heat of the steam molten salt heat exchanger 2 while passing through the fourth molten salt pipeline 28.

[0041] In one embodiment of the present invention, the molten salt of the first molten salt assembly is binary salt, and the molten salt of the second molten salt assembly is ternary salt.

[0042] In addition, an embodiment of the present invention also provides a generator set that takes into account peak load regulation and heat supply, which is applied to the method mentioned in any of the above embodiments, including a nuclear island steam generator 1, a steam molten salt heat exchanger 2, a hydrophobic molten salt heat exchanger 3, a first molten salt component, a second molten salt component, a heat exchange component, a water supply pipe 4, a steam turbine 5, a generator 6, a heating heater 7 and a heating primary network pipe 8. The steam molten salt heat exchanger 2 is respectively connected to the nuclear island steam generator 1 and the first molten salt component, and is used to store the steam heat of the nuclear island steam generator 1 to the second molten salt component. In the molten salt of a molten salt component, the hydrophobic molten salt heat exchanger 3 is respectively connected to the steam molten salt heat exchanger 2 and the second molten salt component, and is used to store the hydrophobic heat of the steam molten salt heat exchanger 2 in the molten salt of the second molten salt component. The heat exchange component is respectively connected to the first molten salt component and the water supply pipe 4, the steam turbine 5 is connected to the heat exchange component through the steam pipe, the steam turbine 5 is connected to the generator 6, and the heating heater 7 is respectively connected to the second molten salt component and the heating primary network pipe 8, and is used to transfer the molten salt heat of the second molten salt component to the heating primary network pipe 8.

[0043] In one embodiment of the present invention, the inlet of the third molten salt pipeline 20 is disposed at the inlet of the superheater 16 , and the outlet of the third molten salt pipeline 20 is disposed between the superheater 16 and the evaporator 17 .

[0044] In one embodiment of the present invention, it also includes an extraction steam feed water heat exchanger 30 and a molten salt feed water heat exchanger 33. One end of the extraction steam feed water heat exchanger 30 is connected to the high-pressure cylinder through the extraction steam pipe 31, and the other end is connected to the feed water pipe 4. A thermal power feed water pump 32 is provided on the feed water pipe 4; the molten salt feed water heat exchanger 33 and the extraction steam feed water heat exchanger 30 are connected in parallel on the feed water pipe 4, and the molten salt feed water heat exchanger 33 is respectively connected to the feed water pipe 4 and the fifth molten salt pipe 29. A nuclear island feed water pump 34 is provided on the pipe between the hydrophobic molten salt heat exchanger 3 and the nuclear island steam generator 1.

[0045] The process and purpose of the above technical solution are introduced below.

[0046] 1) Molten salt heat absorption system

[0047] The high-temperature steam at the outlet of the nuclear island steam generator 1 enters the steam molten salt heat exchanger 2, heating the high-temperature molten salt and converting it into hydrophobicity. The hydrophobicity at the outlet of the steam molten salt heat exchanger 2 enters the hydrophobic molten salt heat exchanger 3, heating the low-temperature molten salt. After cooling to the required inlet temperature of the nuclear island steam generator 1, it is boosted by the nuclear island feedwater pump 34 and enters the nuclear island steam generator 1. The low-temperature binary salt in the high-temperature cold salt tank 11 is boosted by the high-temperature cold salt pump 12 and enters the steam molten salt heat exchanger 2. It is heated by the high-temperature steam from the nuclear island. The molten salt at the outlet of the steam molten salt heat exchanger 2 enters the molten salt electric heater 15, where it is further heated to the specified temperature before entering the high-temperature hot salt tank 9. The low-temperature ternary salt in the low-temperature cold salt tank 26 is boosted by the low-temperature cold salt pump 27 and enters the hydrophobic molten salt heat exchanger 3. After being heated by the hydrophobicity and heated to the specified temperature, it enters the low-temperature hot salt tank 24.

[0048] This system utilizes a dual-temperature molten salt energy storage system consisting of a high-temperature molten salt system and a low-temperature molten salt system. The high-temperature molten salt medium utilizes a binary salt (e.g., 60% sodium nitrate and 40% potassium nitrate by mass), while the low-temperature molten salt medium utilizes a ternary salt (e.g., 7% sodium nitrate, 53% potassium nitrate, and 40% sodium nitrite by mass). The nuclear island reactor utilizes a high-temperature gas-cooled reactor (HTGR), with high-temperature, high-pressure steam flowing out of the island steam generator. The high-temperature molten salt medium utilizes a binary salt, which has a high maximum operating temperature and excellent stability at high temperatures. After fully utilizing the latent heat of high-pressure steam, it can be heated to a higher temperature by a molten salt electric heater to meet the temperature requirements of the main steam and high-temperature reheat steam of the original thermal power unit. The low-temperature molten salt medium utilizes a ternary salt, which has a lower melting point and can cool the feedwater entering the island steam generator to the required temperature without solidifying. In summary, by rationally configuring the cold salt pump capacities in the high and low temperature zones, the power of the molten salt heat absorption system can be matched with the power of the nuclear island reactor.

[0049] 2) Molten salt heat release system

[0050] Feedwater from the original thermal power unit boiler inlet feedwater pipe 4 enters the molten salt feedwater heat exchanger 33 for heating before entering the steam generation system. It then passes through the preheater 18, evaporator 17, and superheater 16, where it is heated by the molten salt to become high-temperature superheated steam and enters the original thermal power unit main steam pipe 21. Low-temperature reheat steam from the original thermal power unit cold section pipe 22 enters the reheater, where it is heated by the molten salt to become high-temperature reheat steam and enters the original thermal power unit hot section pipe 23. High-temperature binary salt in the high-temperature zone hot salt tank 9 is pressurized by the high-temperature zone hot salt pump 10 and enters the steam generation system. The high-temperature binary salt is then split into two streams: one entering the superheater 16 and the other entering the reheater 19. The two streams of molten salt are cooled by steam and then merged into one stream, which then enters the evaporator 17 and preheater 18, ultimately cooling to become low-temperature binary salt and entering the high-temperature zone cold salt tank 11. The high-temperature ternary salt in the low-temperature zone hot salt tank 24 is pressurized by the low-temperature zone hot salt pump 25 and is divided into two paths. One path enters the heating heater 7, heats the hot network return water in the heating primary network return pipe, and then enters the heating primary network supply pipe to provide heat to the outside; the other path enters the molten salt feed water heat exchanger 33, heats part of the deaerator to feed water to reduce heat recovery and extraction steam; the two paths of molten salt are cooled into low-temperature ternary salt and then merged into one path to enter the low-temperature zone cold salt tank 26.

[0051] In this system, considering the anti-condensation problem of low-temperature binary salt in the high-temperature zone, the outlet drain temperature of the steam molten salt heat exchanger 2 is relatively high. By setting up a low-temperature zone molten salt system and setting up a heating heater 7 and a molten salt feed water heat exchanger 33, the heat of the drain at the outlet of the steam molten salt heat exchanger 2 can be fully utilized to heat the return water of the heat network and part of the deaerator for feed water, thereby reducing the drain temperature while achieving external heat supply, and reducing the amount of heat recovery steam extraction to improve the system's power generation capacity. At the same time, the amount of low-temperature molten salt entering the heating heater 7 and the molten salt feed water heat exchanger 33 can be adjusted according to the heating demand and the power demand of the steam turbine generator. By reasonably configuring the capacity of the hot salt pumps in the high and low temperature zones, the power of the molten salt heat release system can be matched with the power of the original thermal power turbine and the heating load.

[0052] 3) Steam turbine generator system

[0053] The original thermal power plant's steam turbine generator system remains unchanged. The high-temperature, high-pressure main steam from the molten salt heat release system enters the original thermal power plant's main steam pipeline 21, then enters the original steam turbine's high-pressure cylinder to propel the turbine to generate electricity. Exhaust steam from the turbine's high-pressure cylinder flows through the original thermal power plant's cold section pipeline 22 and enters the molten salt heat release system's reheater 19. After being heated to high-temperature reheated steam, it enters the original thermal power plant's hot section pipeline 23 and then enters the original thermal power plant's intermediate-pressure cylinder to propel the turbine to generate electricity. The feedwater from the original thermal power plant's feedwater pump outlet is split into two routes: one route enters the original thermal power plant's extraction steam feedwater heat exchanger 30 to be heated by the extraction steam, while the other route enters the molten salt feedwater heat exchanger 33 to be heated by the low-temperature molten salt. Both routes are heated to the same temperature before entering the molten salt heat release system.

[0054] In this system, the feed water flow rate entering the original extraction steam feed water heat exchanger 30 and the molten salt feed water heat exchanger 33 can be adjusted according to the molten salt heat storage capacity in the low temperature zone and the power of the steam turbine generator, and the steam turbine extraction volume can be reduced to increase the turbine power generation power.

[0055] It should be noted that, in this article, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the presence of other identical factors in the process, method, article or device comprising the elements.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for replacing thermal power with nuclear power to provide peak-shaving heat, characterized in that: include: The steam heat of the nuclear island steam generator (1) is stored in the molten salt of the first molten salt component by using the steam molten salt heat exchanger (2); Using the heat exchange component to heat the feed water of the water supply pipe (4) with the heat of the molten salt of the first molten salt component to generate steam, so that the steam drives the steam turbine (5) to work; Using a hydrophobic molten salt heat exchanger (3) to store the hydrophobic heat of the steam molten salt heat exchanger (2) in the molten salt of the second molten salt component; Utilizing a heating heater (7) to transfer the molten salt heat of the second molten salt assembly to a heating primary network pipe (8); The first molten salt assembly comprises a high-temperature zone hot salt tank (9), a high-temperature zone hot salt pump (10), a high-temperature zone cold salt tank (11) and a high-temperature zone cold salt pump (12), wherein the high-temperature zone hot salt tank (9) and the high-temperature zone cold salt tank (11) are connected via a first molten salt pipeline (13) and a second molten salt pipeline (14); The method of using the steam molten salt heat exchanger (2) to store the steam heat of the nuclear island steam generator (1) in the molten salt of the first molten salt component comprises: The high-temperature zone cold salt pump (12) is used to supply the high-temperature zone cold molten salt in the high-temperature zone cold salt tank (11) to the high-temperature zone hot salt tank (9) through the first molten salt pipeline (13); wherein the high-temperature zone cold molten salt absorbs the steam heat of the nuclear island steam generator (1) while passing through the first molten salt pipeline (13); The heat exchange assembly comprises a superheater (16), an evaporator (17) and a preheater (18) which are sequentially arranged along the flow direction of the hot molten salt, and the preheater (18), the evaporator (17) and the superheater (16) are sequentially arranged along the flow direction of the feed water, and the outlet of the superheater (16) is connected to the steam turbine (5); The method of utilizing the heat exchange component to heat the water supply of the water supply pipe (4) with the heat of the molten salt of the first molten salt component to generate steam comprises: The preheater (18), the evaporator (17) and the superheater (16) are used to heat the feed water in the feed water pipe (4) in sequence to generate superheated steam; The second molten salt assembly comprises a low-temperature zone hot salt tank (24), a low-temperature zone hot salt pump (25), a low-temperature zone cold salt tank (26) and a low-temperature zone cold salt pump (27), wherein the low-temperature zone hot salt tank (24) and the low-temperature zone cold salt tank (26) are connected via a fourth molten salt pipeline (28) and a fifth molten salt pipeline (29); The method of using the hydrophobic molten salt heat exchanger (3) to store the hydrophobic heat of the steam molten salt heat exchanger (2) in the molten salt of the second molten salt component comprises: The low-temperature zone cold molten salt in the low-temperature zone cold salt tank (26) is supplied to the low-temperature zone hot salt tank (24) through the fourth molten salt pipeline (28) by using the low-temperature zone cold salt pump (27); wherein the low-temperature zone cold molten salt absorbs the hydrophobic heat of the steam molten salt heat exchanger (2) while passing through the fourth molten salt pipeline (28); The power generation unit taking into account peak load regulation and heat supply comprises an extraction steam feed water heat exchanger (30) and a molten salt feed water heat exchanger (33), one end of the extraction steam feed water heat exchanger (30) is connected to the high-pressure cylinder through an extraction steam pipe (31), and the other end is connected to the feed water pipe (4), and a thermal power feed water pump (32) is provided on the feed water pipe (4); the molten salt feed water heat exchanger (33) and the extraction steam feed water heat exchanger (30) are connected in parallel on the feed water pipe (4), and the molten salt feed water heat exchanger (33) is respectively connected to the feed water pipe (4) and the fifth molten salt pipe (29), and a nuclear island feed water pump (34) is provided on the pipe between the hydrophobic molten salt heat exchanger (3) and the nuclear island steam generator (1).

2. The method according to claim 1, characterized in that The first molten salt component further comprises a molten salt electric heater (15), which is arranged on the first molten salt pipeline (13) and located between the steam molten salt heat exchanger (2) and the high-temperature zone hot salt tank (9); Also includes: The molten salt electric heater (15) is used to further heat the molten salt flowing out of the steam molten salt heat exchanger (2).

3. The method according to claim 2, characterized in that The heat exchange component further includes a reheater (19), the second molten salt pipeline (14) is further connected in parallel with a third molten salt pipeline (20), the reheater (19) is arranged on the third molten salt pipeline (20), the steam turbine (5) includes a high-pressure cylinder and an intermediate-pressure cylinder, the outlet of the superheater (16) is connected to the inlet of the high-pressure cylinder through the thermal power main steam pipeline (21), the outlet of the high-pressure cylinder is connected to the inlet of the reheater (19) through the thermal power cold section pipeline (22), and the outlet of the reheater (19) is connected to the inlet of the intermediate-pressure cylinder through the thermal power hot section pipeline (23); The method of utilizing the heat exchange component to heat the water supply of the water supply pipe (4) with the heat of the molten salt of the first molten salt component to generate steam comprises: The exhaust steam of the high-pressure cylinder is reheated by using the reheater (19), so that the generated steam enters the medium-pressure cylinder through the thermal power heating section pipeline (23).

4. The method according to any one of claims 1 to 3, characterized in that The molten salt of the first molten salt component is binary salt, and the molten salt of the second molten salt component is ternary salt.

5. A generator set that takes into account peak load regulation and heat supply, characterized in that: The method applied to claim 3 comprises a nuclear island steam generator (1), a steam molten salt heat exchanger (2), a hydrophobic molten salt heat exchanger (3), a first molten salt component, a second molten salt component, a heat exchange component, a water supply pipe (4), a steam turbine (5), a generator (6), a heating heater (7) and a heating primary network pipe (8), wherein the steam molten salt heat exchanger (2) is respectively connected to the nuclear island steam generator (1) and the first molten salt component to store the steam heat of the nuclear island steam generator (1) in the molten salt of the first molten salt component, and the hydrophobic molten salt heat exchanger (3) is respectively connected to the first molten salt component. The steam molten salt heat exchanger (2) is connected to the second molten salt component and is used to store the hydrophobic heat of the steam molten salt heat exchanger (2) in the molten salt of the second molten salt component. The heat exchange component is connected to the first molten salt component and the water supply pipe (4) respectively. The steam turbine (5) is connected to the heat exchange component through a steam pipe. The steam turbine (5) is connected to the generator (6). The heating heater (7) is connected to the second molten salt component and the heating primary network pipe (8) respectively, and is used to transfer the molten salt heat of the second molten salt component to the heating primary network pipe (8).

6. The generator set according to claim 5, characterized in that: The inlet of the third molten salt pipeline (20) is arranged at the inlet of the superheater (16), and the outlet of the third molten salt pipeline (20) is arranged between the superheater (16) and the evaporator (17).

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