Reconstruction method for replacing thermal power with nuclear power and giving consideration to peak shaving heat supply and generator set

Abstract

The invention relates to the technical field of thermal power transformation, in particular to a nuclear power replacement thermal power transformation method giving consideration to peak shaving heat supply and a generator set. The nuclear power replacement thermal power transformation method considering peak shaving heat supply comprises the steps that steam heat of a nuclear island steam generator is stored into fused salt of a first fused salt assembly through a steam fused salt heat exchanger; a heat exchange assembly is used for heating feed water of a water supply pipeline through fused salt heat of the first fused salt assembly so as to generate steam, and the steam drives a steam turbine to work; a hydrophobic fused salt heat exchanger is used for storing hydrophobic heat of the steam fused salt heat exchanger into fused salt of a second fused salt assembly; and molten salt heat of the second molten salt assembly is transmitted to a heating primary net pipeline through a heating heater. According to the technical scheme, the problem that peak regulation capacity is not matched in the process of changing thermal power into nuclear power can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal power transformation, and particularly relates to a method for replacing thermal power with nuclear power that takes into account peak shaving and heat supply, and a generator set. Background Art

[0002] Building a new power system is a key measure for China to achieve the goal of carbon neutrality. How to achieve the orderly reduction of thermal power on the basis of the safe and reliable replacement of new energy is the core problem of the new power system. In the Chinese power system, the stock of thermal power is large, the proportion is high, and the carbon emissions are high, so the situation of carbon emission reduction in thermal power is severe.

[0003] At present, in addition to early retirement and reducing direct emissions through a carbon capture system for carbon reduction measures for thermal power plants, using low-carbon technologies such as nuclear energy to transform thermal power units is also an exploratory path. From a functional perspective, both nuclear power and thermal power can be used as base load power sources. From the perspective of resource utilization rate, if thermal power rigidly exits when the remaining service life is relatively long, the overall cost of retiring and demolishing existing thermal power plants is relatively high. Therefore, by transforming thermal power plants into nuclear power plants, resources such as the grid connection system, water source, land, transmission facilities, and some process equipment and infrastructure of existing thermal power plants can be utilized to reduce the overall cost of the power plant.

[0004] However, frequent regulation of the reactor load of a nuclear power plant will cause fluctuations in the reactor state, posing potential safety hazards in operation. Due to its own technical characteristics, the peak shaving and frequency modulation capabilities of nuclear power are much lower than those of thermal power units, and the flexibility is poor. A considerable part of thermal power units in China have both power generation and heat supply functions, and the operation of the units follows the principle of heat determining power, while most nuclear power units in China do not have the heat supply function. Therefore, it is necessary to study a method for transforming thermal power units into nuclear power units to solve the problem of mismatch between power and peak shaving capabilities during the transformation of thermal power units into nuclear power units. Summary of the Invention

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

[0006] In a first aspect, an embodiment of the present invention provides a method for replacing thermal power with nuclear power that takes into account peak shaving and heat supply, including:

[0007] Using a steam molten salt heat exchanger to store the steam heat of the nuclear island steam generator in the molten salt of the first molten salt assembly;

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

[0009] Use a hydrophobic molten salt heat exchanger to store the heat of the condensate from the steam molten salt heat exchanger in the molten salt of the second molten salt assembly;

[0010] Use a heating heater to transfer the heat of the molten salt of the second molten salt assembly to the primary heating network pipeline.

[0011] In a second aspect, an embodiment of the present invention provides a power generation unit for peak shaving and heat supply, which is applied to the method described in the above embodiment. The power generation unit includes a nuclear island steam generator, a steam molten salt heat exchanger, a hydrophobic molten salt heat exchanger, a first molten salt assembly, a second molten salt assembly, a heat exchange assembly, a feed water pipeline, a steam turbine, a generator, a heating heater, and a primary heating network pipeline. The steam molten salt heat exchanger is respectively connected to the nuclear island steam generator and the first molten salt assembly, and is used to store the steam heat of the nuclear island steam generator in the molten salt of the first molten salt assembly. The hydrophobic molten salt heat exchanger is respectively connected to the steam molten salt heat exchanger and the second molten salt assembly, and is used to store the heat of the condensate from the steam molten salt heat exchanger in the molten salt of the second molten salt assembly. The heat exchange assembly is respectively connected to the first molten salt assembly and the feed water pipeline. The steam turbine is connected to the heat exchange assembly through a steam pipeline. The steam turbine is connected to the generator. The heating heater is respectively connected to the second molten salt assembly and the primary heating network pipeline, and is used to transfer the heat of the molten salt of the second molten salt assembly to the primary heating network pipeline.

[0012] An embodiment of the present invention provides a method and a power generation unit for replacing thermal power with nuclear power for peak shaving and heat supply. The heat of the secondary loop steam of the nuclear island is stored in the first molten salt assembly (i.e., the molten salt in the high-temperature zone) and the second molten salt assembly (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 respectively 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 power generation system can be decoupled. At the same time, by setting a low-temperature zone molten salt energy storage system, external heat supply of the system is realized. Through decoupling, the power of the reactor can be different from the power of the original thermal power steam turbine generator, and the problem of power mismatch in the process of replacing thermal power with nuclear power is solved. Through decoupling, the power of the steam turbine generator can be flexibly adjusted according to the requirements of the power grid, while the power of the reactor can remain unchanged, and the problem of peak shaving capacity mismatch in the process of replacing thermal power with nuclear power is solved. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a flowchart of a method for transforming nuclear power to replace thermal power while taking into account peak shaving and heating provided by an embodiment of the present invention;

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

[0016] Reference numerals:

[0017] 1 - Nuclear island steam generator; 2 - Steam molten salt heat exchanger; 3 - Drain molten salt heat exchanger; 4 - Feed water pipe; 5 - Steam turbine; 6 - Generator; 7 - Heating heater; 8 - Primary heating network pipe; 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 pipe; 14 - Second molten salt pipe; 15 - Molten salt electric heater; 16 - Superheater; 17 - Evaporator; 18 - Preheater; 19 - Reheater; 20 - Third molten salt pipe; 21 - Thermal power main steam pipe; 22 - Thermal power cold - section pipe; 23 - Thermal power hot - section pipe; 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 pipe; 29 - Fifth molten salt pipe; 30 - Extraction steam feed water heat exchanger; 31 - Extraction steam pipe; 32 - Thermal power feed water pump; 33 - Molten salt feed water heat exchanger; 34 - Nuclear island feed water pump. Detailed implementation manners

[0018] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0019] As Figure 1 and Figure 2 shown, the method for transforming nuclear power to replace thermal power while taking into account peak shaving and heating provided by an embodiment of the present invention includes:

[0020] Step S1: Use 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 assembly;

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

[0022] Step S3: Use the drain molten salt heat exchanger 3 to store the drain heat of the steam molten salt heat exchanger 2 in the molten salt of the second molten salt assembly;

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

[0024] In this embodiment, the steam heat of the secondary circuit of the nuclear island is stored in the first molten salt assembly (i.e., the molten salt in the high-temperature area) and the second molten salt assembly (i.e., the molten salt in the low-temperature area), and different molten salt heat absorption system powers and molten salt heat release system powers are respectively matched 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 power generation system can be decoupled. At the same time, by setting up the low-temperature area molten salt energy storage system, the system realizes external heat supply. Through decoupling, the reactor power can be different from the power of the original thermal power steam turbine generator, solving the problem of power mismatch in the process of converting thermal power to nuclear power. Through decoupling, the power of the steam turbine generator can be flexibly adjusted according to the requirements of the power grid, while the reactor power can remain unchanged, solving the problem of mismatch in peak shaving capacity in the process of converting thermal power to nuclear power.

[0025] It should be noted that the above combined generator set is the transformation of the original thermal power using nuclear power. Among them, the nuclear power plant mainly consists of a nuclear island reactor system, a conventional island steam turbine generator system, and a plant-wide auxiliary system. The thermal power plant mainly consists of a boiler system, a main plant steam turbine generator system, and a plant-wide auxiliary system. The transformation of the thermal power unit to nuclear power uses the nuclear island reactor system to replace the boiler system of the thermal power unit to provide heat source for the power plant, and other parts such as the original thermal power unit steam turbine generator system are reused as much as possible. When transforming the thermal power plant to nuclear power, while using the existing power grid access system of the thermal power plant to reduce the overall cost of the power plant, the transformed power plant also needs to have the peak shaving and frequency modulation capabilities and a certain external heat supply capacity that match the original thermal power unit to meet the flexibility requirements of the power grid for the power plant and the heat supply demand.

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

[0027] 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 assembly includes:

[0028] Using the high-temperature area cold salt pump 12 to supply the high-temperature area cold molten salt in the high-temperature area cold salt tank 11 to the high-temperature area hot salt tank 9 through the first molten salt pipeline 13; among them, the high-temperature area cold molten salt absorbs the steam heat of the nuclear island steam generator 1 in 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 disposed 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] It further 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 arranged in sequence along the flow direction of the hot molten salt, and the preheater 18, the evaporator 17, and the superheater 16 are arranged in sequence along the flow direction of the feed water. The outlet of the superheater 16 is connected to the steam turbine 5;

[0033] Using the heat exchange assembly to heat the feed water in the feed water pipeline 4 with the molten salt heat of the first molten salt assembly to generate steam, including:

[0034] The feed water in the feed water pipeline 4 is sequentially heated 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. A third molten salt pipeline 20 is also connected in parallel to the second molten salt pipeline 14. The reheater 19 is disposed 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. 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] Using the heat exchange assembly to heat the feed water in the feed water pipeline 4 with the molten salt heat of the first molten salt assembly 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 intermediate-pressure cylinder through the thermal power hot section pipeline 23.

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

[0039] 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, including:

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

[0041] In an embodiment of the present invention, the molten salt of the first molten salt assembly adopts a binary salt, and the molten salt of the second molten salt assembly adopts a ternary salt.

[0042] In addition, an embodiment of the present invention further provides a generator set for peak shaving and heat supply, which is applied to the method mentioned in any one of the above embodiments, and includes a nuclear island steam generator 1, a steam molten salt heat exchanger 2, a condensed water molten salt heat exchanger 3, a first molten salt assembly, a second molten salt assembly, a heat exchange assembly, a feed water pipeline 4, a steam turbine 5, a generator 6, a heating heater 7, and a heating primary network pipeline 8. The steam molten salt heat exchanger 2 is respectively connected to the nuclear island steam generator 1 and the first molten salt assembly, and is used to store the steam heat of the nuclear island steam generator 1 in the molten salt of the first molten salt assembly. The condensed water molten salt heat exchanger 3 is respectively connected to the steam molten salt heat exchanger 2 and the second molten salt assembly, and is used to store the heat of the condensed water of the steam molten salt heat exchanger 2 in the molten salt of the second molten salt assembly. The heat exchange assembly is respectively connected to the first molten salt assembly and the feed water pipeline 4. The steam turbine 5 is connected to the heat exchange assembly through a steam pipeline. The steam turbine 5 is connected to the generator 6. The heating heater 7 is respectively connected to the second molten salt assembly and the heating primary network pipeline 8, and is used to transfer the molten salt heat of the second molten salt assembly to the heating primary network pipeline 8.

[0043] In an embodiment of the present invention, 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.

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

[0045] The process and purpose of the above technical solution will be 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 to heat the molten salt in the high-temperature zone and then becomes condensed water. The condensed water at the outlet of the steam molten salt heat exchanger 2 enters the condensed water molten salt heat exchanger 3 to heat the molten salt in the low-temperature zone, and after being cooled to the water inlet temperature required by the nuclear island steam generator 1, it enters the nuclear island steam generator 1 after being boosted in pressure by the nuclear island feed water pump 34. The low-temperature binary salt in the high-temperature zone cold salt tank 11 enters the steam molten salt heat exchanger 2 after being boosted in pressure by the high-temperature zone cold salt pump 12, is heated and raised in temperature by the high-temperature steam of the nuclear island, and the molten salt at the outlet of the steam molten salt heat exchanger 2 enters the molten salt electric heater 15 to be further heated to the specified temperature and then enters the high-temperature zone hot salt tank 9. The low-temperature ternary salt in the low-temperature zone cold salt tank 26 enters the condensed water molten salt heat exchanger 3 after being boosted in pressure by the low-temperature zone cold salt pump 27, is heated and raised in temperature to the specified temperature by the condensed water and then enters the low-temperature zone hot salt tank 24.

[0048] In this system, by setting up a dual-temperature zone molten salt energy storage system including a high-temperature zone molten salt system and a low-temperature zone molten salt system, the molten salt medium in the high-temperature zone adopts binary salt (for example, it can include sodium nitrate with a mass fraction of 60% and potassium nitrate with a mass fraction of 40%), and the molten salt medium in the low-temperature zone adopts ternary salt (for example, it can include sodium nitrate with a mass fraction of 7%, potassium nitrate with a mass fraction of 53% and sodium nitrite with a mass fraction of 40%). The nuclear island reactor technology adopts a high-temperature gas-cooled reactor, and the outlet of the nuclear island steam generator is high-temperature and high-pressure steam. The molten salt medium in the high-temperature zone adopts binary salt, which has a high maximum operating temperature and excellent stability at high temperatures. After fully utilizing the latent heat of the high-pressure steam, it can be heated to a relatively high temperature by the 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 molten salt medium in the low-temperature zone adopts ternary salt, which has a relatively low melting point and can cool the feed water entering the nuclear island steam generator to the required temperature without solidifying. In summary, by reasonably configuring the capacities of the high-temperature and low-temperature zone cold salt pumps, 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] The feed water in the feed water pipe 4 at the boiler inlet of the original thermal power unit enters the molten salt feed water heat exchanger 33, is heated, and then enters the steam generation system. It passes through the preheater 18, evaporator 17, and superheater 16 in sequence, and is heated by the molten salt into high-temperature superheated steam and enters the original thermal power main steam pipe 21. The low-temperature reheated steam from the cold section pipe 22 of the original thermal power enters the reheater, is heated by the molten salt into high-temperature reheated steam, and then enters the hot section pipe 23 of the original thermal power. The high-temperature binary salt in the high-temperature zone hot salt tank 9 is boosted by the high-temperature zone hot salt pump 10 and enters the steam generation system, which is divided into two paths. One path enters the superheater 16, and the other path enters the reheater 19. The two paths of molten salt are cooled by the steam and then merged into one path, and enter the evaporator 17 and preheater 18 in sequence, and finally are cooled into low-temperature binary salt and enter the high-temperature zone cold salt tank 11. The high-temperature ternary salt in the low-temperature zone hot salt tank 24 is boosted by the low-temperature zone hot salt pump 25 and divided into two paths. One path enters the heating heater 7, heats the heat network return water in the heating primary network return water pipe, and then enters the heating primary network supply pipe to supply heat externally; the other path enters the molten salt feed water heat exchanger 33 to heat part of the feed water from the deaerator to reduce the extraction steam for regeneration; the two paths of molten salt are cooled into low-temperature ternary salt and then merged into one path and enter the low-temperature zone cold salt tank 26.

[0051] In this system, considering the anti-freezing problem of the low-temperature binary salt in the high-temperature zone, the drain temperature at the outlet of the steam-molten salt heat exchanger 2 is relatively high. By setting up the molten salt system in the low-temperature zone, the heating heater 7, and the molten salt feed water heat exchanger 33, the heat of the drain water at the outlet of the steam-molten salt heat exchanger 2 can be fully utilized to heat the heat network return water and part of the feed water from the deaerator, reduce the drain temperature while realizing external heat supply, and reduce the extraction steam for regeneration to improve the power generation capacity of the system. 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 capacities of the high-temperature and low-temperature zone hot salt pumps, the power of the molten salt heat release system can be matched with the power of the original thermal power steam turbine and the heating load.

[0052] 3) Steam turbine generator system

[0053] The original thermal power steam turbine generator system remains unchanged. The high-temperature and high-pressure main steam from the molten salt heat release system enters the original thermal power main steam pipe 21, and then enters the high-pressure cylinder of the original steam turbine to drive the steam turbine to generate electricity. The exhaust steam from the high-pressure cylinder of the steam turbine enters the reheater 19 of the molten salt heat release system through the cold section pipe 22 of the original thermal power, is heated into high-temperature reheated steam, and then enters the hot section pipe 23 of the original thermal power, and then enters the intermediate-pressure cylinder of the original thermal power steam turbine to drive the steam turbine to generate electricity. The feed water at the outlet of the original thermal power feed water pump is divided into two paths. One path enters the original thermal power extraction feed water heat exchanger 30 and is heated and raised in temperature by the extraction steam, and the other path enters the molten salt feed water heat exchanger 33 and is heated and raised in temperature by the low-temperature zone molten salt. The two paths of feed water are heated to the same temperature and then enter the molten salt heat release system.

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

[0055] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

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

Claims

1. A method for replacing thermal power with nuclear power to provide peak load heating, 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 a 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; The heating heater (7) is used to transfer the molten salt heat of the second molten salt component to the primary heating network pipeline (8).

2. The method according to claim 1, characterized in that 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); 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 a steam molten salt heat exchanger (2) to store the steam heat of a nuclear island steam generator (1) in the molten salt of a first molten salt assembly 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).

3. The method according to claim 2, characterized in that The first molten salt component further comprises a molten salt electric heater (15), wherein the molten salt electric heater (15) is arranged 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); 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).

4. The method according to claim 3, characterized in that The heat exchange component 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 using the heat exchange component to heat the feed water of the water supply pipe (4) with the molten salt heat 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 pipeline (4) in sequence to generate superheated steam.

5. The method according to claim 4, characterized in that The heat exchange component also includes a reheater (19); the second molten salt pipeline (14) is also 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 via a thermal power main steam pipeline (21); the outlet of the high-pressure cylinder is connected to the inlet of the reheater (19) via a thermal power cold section pipeline (22); and the outlet of the reheater (19) is connected to the inlet of the intermediate-pressure cylinder via a thermal power hot section pipeline (23); The method of using the heat exchange component to heat the feed water of the water supply pipe (4) with the molten salt heat of the first molten salt component to generate steam comprises: 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).

6. The method according to claim 5, characterized in that 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); 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 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 comprises: The low-temperature zone cold salt pump (27) is used to supply the low-temperature zone cold molten salt in the low-temperature zone cold salt tank (26) to the low-temperature zone hot salt tank (24) through the fourth molten salt pipeline (28); 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).

7. The method according to any one of claims 1 to 6, 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.

8. A generator set that takes into account both peak load regulation and heating, characterized in that: The method applied to claim 6 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 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 a steam pipe. The steam turbine (5) is connected to the generator (6). 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).

9. The generator set according to claim 8, 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).

10. The generator set according to claim 9, characterized in that: 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 via an extraction steam pipeline (31), and the other end is connected to the feed water pipeline (4); a thermal power feed water pump (32) is provided on the feed water pipeline (4); the molten salt feed water heat exchanger (33) and the extraction steam feed water heat exchanger (30) are connected in parallel to the feed water pipeline (4); the molten salt feed water heat exchanger (33) is respectively connected to the feed water pipeline (4) and the fifth molten salt pipeline (29); a nuclear island feed water pump (34) is provided on the pipeline between the hydrophobic molten salt heat exchanger (3) and the nuclear island steam generator (1).

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