Small-reactor multi-unit industrial steam supply system

Abstract

The invention discloses a small-reactor multi-unit industrial steam supply system which comprises a small-reactor multi-unit combined supply system, a fused salt heat storage system and a photovoltaic power generation system along the process, the fused salt heat storage system is connected with the small-reactor multi-unit combined supply system and the photovoltaic power generation system along the process, and the system can supply medium-pressure industrial steam with the pressure of 3.5 MPa and the temperature of 380 DEG C through a small pressurized water reactor. And a new clean energy solution is provided for the petrochemical park.

Description

Technical Field

[0001] The present invention belongs to the technical field of nuclear energy application, and relates to a small reactor multi-unit industrial steam supply system. Background Art

[0002] The chemical industry is one of the main industries consuming industrial steam. In 2020, the carbon dioxide emissions of the chemical industry were 500 million to 600 million tons, mainly distributed in the petrochemical, coking, and coal chemical industries.

[0003] Publication No. CN117606001A discloses a modular liquid-solid two-phase energy storage clean energy heating, cooling and steam combined supply system, including a molten salt energy storage heat exchange module, a molten salt pool connected to the molten salt energy storage heat exchange module through a molten salt pool input pipeline, an electric heater that supplies clean energy electric energy and is connected to the molten salt pool through a molten salt pool output pipeline, a molten salt pump and a molten salt pump outlet valve installed on the molten salt pool output pipeline, an electric heating output pipeline that connects the electric heater and the molten salt energy storage heat exchange module, a module output pipeline connected to the molten salt energy storage heat exchange module, a heating branch pipeline connected to the module output pipeline, a heating valve installed on the heating branch pipeline, a heat network heater installed at the end of the heating branch pipeline, a steam supply branch pipeline connected to the module output pipeline, a steam supply valve installed on the heating branch pipeline, a user device that is connected to the heat network heater through a heating output pipeline and a heating input pipeline and is also installed at the end of the heating branch pipeline, a heat network water circulation pump installed on the heating input pipeline, a cooling supply branch pipeline connected to the module output pipeline, a cooling supply valve installed on the cooling supply branch pipeline, a steam refrigeration unit that is connected to the user device through a cooling output pipeline and a cooling input pipeline and is also installed at the end of the cooling supply branch pipeline, a cooling circulation pump installed on the cooling output pipeline, a heat network heater output pipeline connected to the heat network heater, a user device output pipeline connected to the user device, a steam refrigeration unit output pipeline connected to the steam refrigeration unit, a module input pipeline connected to the heat network heater output pipeline, the user device output pipeline and the steam refrigeration unit output pipeline at the same time, a condensate water tank and a feed water pump installed on the module input pipeline, a softening water tank connected to the condensate water tank through a condensate water tank input pipeline, and a make-up water pump installed on the condensate water tank input pipeline. It uses clean energy and has low cost, and solves the problems of centralized heating, cooling and steam supply in rural areas and industrial parks.

[0004] In addition to a large amount of fossil energy as raw materials and electricity, a large amount of steam is also required as a heat source in the chemical production process. Among them, coal-fired boilers, gas boilers, etc. have long been the main steam supply heat sources. The steam supply from coal-fired boilers faces the pressure of being phased out under the background of "dual carbon". The price of steam supplied by gas boilers is relatively high, resulting in an increase in the production cost of downstream products, reducing the competitiveness of products, and being unfavorable to the development of the company. There is an urgent need for a technology to provide a new hydrogen energy solution for petrochemical parks. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a small reactor multi-unit industrial steam supply system, which can use a small pressurized water reactor to supply medium-pressure industrial steam at 3.5 MPa and 380 °C, providing a new clean energy solution for petrochemical parks.

[0006] To achieve the above purpose, the present invention discloses a small reactor multi-unit industrial steam supply system, including a small reactor multi-unit combined supply system, a molten salt energy storage system, and a photovoltaic power generation system along the route. Among them, the molten salt energy storage system is connected to the small reactor multi-unit combined supply system and the photovoltaic power generation system along the route.

[0007] The further improvement of the small reactor multi-unit industrial steam supply system of the present invention lies in:

[0008] Furthermore, the small reactor multi-unit combined supply system includes a steam supply main pipe and a number of reactor modules. Among them, each reactor module includes a small heating reactor and a steam heat exchange system. In the same reactor module, the outlet of the heat absorption side of the steam heat exchange system is connected to the steam supply main pipe through a first valve, the outlet of the small heating reactor is connected to the inlet of the heat release side of the steam heat exchange system through a second valve, and the outlet of the heat release side of the steam heat exchange system is connected to the inlet of the small heating reactor through a third valve and a medium pump.

[0009] Furthermore, the reactor modules are connected in series in sequence. Among them, the outlet of the small heating reactor in the previous reactor module is connected to the inlet of the heat release side of the steam heat exchange system in the next reactor module through a fourth valve, and the inlet of the medium pump in the previous reactor module is connected to the outlet of the heat release side of the steam heat exchange system in the next reactor module through a fifth valve.

[0010] Furthermore, the number of the reactor modules is five, and a parallel operation mode of four main units and one standby unit is adopted.

[0011] Further, the molten salt thermal energy storage system II includes a high-temperature molten salt tank, a high-temperature molten salt pump, #1 molten salt heat exchanger, #2 molten salt heat exchanger, a low-temperature molten salt tank, a low-temperature molten salt pump, and a molten salt heater. Among them, the outlet of the steam supply main pipe is successively connected to the inlet of the distributed photovoltaic power generation system III through the shell side of the #1 molten salt heat exchanger and the shell side of the #2 molten salt heat exchanger. The outlet of the tube side of the #1 molten salt heat exchanger is successively connected to the inlet of the high-temperature molten salt pump through the low-temperature molten salt tank, the low-temperature molten salt pump, the molten salt heater, and the high-temperature molten salt tank. The outlet of the high-temperature molten salt pump is divided into two paths after passing through the sixth valve. One path is connected to the inlet of the tube side of the #1 molten salt heat exchanger through the seventh valve, and the other path is connected to the inlet of the tube side of the #1 molten salt heat exchanger through the #2 molten salt heat exchanger.

[0012] Further, when the electricity price of the power grid is low at night, the molten salt heater is turned on. The low-temperature molten salt in the low-temperature molten salt tank enters the molten salt heater through the low-temperature molten salt pump and is heated to become high-temperature molten salt. The thermal energy is stored in the high-temperature molten salt tank through the high-temperature molten salt working medium.

[0013] Further, the distributed photovoltaic power generation system III includes a number of photovoltaic power generation modules. The outlet of the tube side of the #2 molten salt heat exchanger is successively connected to the chemical industrial park users through the compressors in each photovoltaic power generation module.

[0014] Further, each photovoltaic power generation module includes an energy storage battery, a photovoltaic power generation device, and a compressor. Among them, the output end of the photovoltaic power generation device is connected to the energy storage battery and the compressor.

[0015] Further, the number of the photovoltaic power generation modules is three, and the compression ratios of the compressors in the three photovoltaic power generation modules are 1.5, 1.4, and 1.2 respectively.

[0016] Further, when the daylight condition is good during the day, the distributed photovoltaic power generation devices drive the compressors to operate, and the extra electric energy is stored in the energy storage battery. When the daylight condition is poor at night, the energy storage battery drives the compressors to operate, maximizing the utilization of the distributed photovoltaic resources.

[0017] The present invention has the following beneficial effects:

[0018] When the small modular multi-unit industrial steam supply system of the present invention is specifically operated, steam is generated by the small modular multi-unit combined supply system, and then after being pressurized and temperature-adjusted by the molten salt thermal energy storage system and the distributed photovoltaic power generation system, it is output as industrial steam. Thus, medium-pressure industrial steam at 3.5 MPa and 380 °C is supplied by the small pressurized water reactor, providing a new clean energy solution for the petrochemical industrial park. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0020] Figure 1 is a structural diagram of the present invention.

[0021] Among them, Ⅰ is a small reactor multi-unit combined heat and power supply system, Ⅱ is a molten salt thermal energy storage system, Ⅲ is a distributed photovoltaic power generation system along the line, 1 is a small-scale heating reactor, 2 is a steam heat exchange system, 3 is a steam supply main pipe, 4 is a high-temperature molten salt tank, 5 is a high-temperature molten salt pump, 6 is #1 molten salt heat exchanger, 7 is #2 molten salt heat exchanger, 8 is a low-temperature molten salt tank, 9 is a low-temperature molten salt pump, 10 is a molten salt heater, 11 is an energy storage battery, 12 is a photovoltaic power generation device, 13 is a compressor, and 14 is a chemical industrial park user. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "include" and "comprise" indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0024] It should also be understood that the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the specification of the present invention and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms.

[0025] It should be further understood that the term " / and" used in the specification of the present invention and the appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in the present invention generally represents an "or" relationship between the front and rear associated objects.

[0026] It should be understood that although terms such as first, second, and third may be used in the embodiments of the present invention to describe preset ranges and the like, these preset ranges should not be limited to these terms. These terms are only used to distinguish the preset ranges from each other. For example, without departing from the scope of the embodiments of the present invention, the first preset range may also be referred to as the second preset range, and similarly, the second preset range may also be referred to as the first preset range.

[0027] Depending on the context, the word "if" as used herein can be interpreted as "when" or "while" or "in response to determining" or "in response to detecting". Similarly, depending on the context, the phrase "if determined" or "if detected (stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detected (stated condition or event)" or "in response to detecting (stated condition or event)".

[0028] 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 in conjunction with 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. Usually, the components of the present invention described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected 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 scope of protection of the present invention.

[0029] Various structural schematic diagrams according to the disclosed embodiments of the present invention are shown in the drawings. These figures are not drawn to scale, where some details are enlarged for the purpose of clear expression, and some details may be omitted. The shapes of various regions and layers shown in the figures and their relative sizes and positional relationships are merely exemplary, and may actually deviate due to manufacturing tolerances or technical limitations, and those skilled in the art can additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0030] As is well known, molten salt thermal energy storage is a sensible heat storage technology that uses the temperature change of molten salt (such as nitrate mixture) within the liquid range to store thermal energy. Molten salt has characteristics such as high boiling point, low viscosity, and chemical stability, and is suitable for large-scale thermal energy storage. The system is divided into heat storage and heat release cycles: during heat storage, off-peak electricity or renewable energy is used to heat the molten salt to a high temperature for storage; during heat release, the high-temperature molten salt exchanges heat with water to generate steam to drive power generation, or directly for heating.

[0031] Application field

[0032] Solar thermal power generation: Molten salt heat storage is a standard feature of solar thermal power stations, such as the GemaSolar power station in Spain and the 100MW project of China's Shouhang High-Tech Dunhuang, which solves the problem of intermittent solar energy.

[0033] Flexibility transformation of thermal power: embedding molten salt heat storage system to achieve thermal and electricity decoupling, improve peak load regulation capacity and reduce carbon emissions.

[0034] Industrial waste heat recovery: The steel, chemical and other industries use molten salt to recover high-temperature waste heat and improve energy utilization.

[0035] Clean heating: Using valley electricity to heat molten salt to achieve low-cost, zero-carbon heating, such as the Dachen Island project in Zhejiang.

[0036] Grid peak load regulation: As an energy storage power station, it participates in power peak load regulation, replacing traditional thermal power peak load regulation and improving grid stability.

[0037] Advantages:

[0038] High heat storage density: The capacity of a single unit can reach more than 100MWh, which is suitable for large-scale energy storage. Long life: The chemical properties of molten salt are stable, and the system life is over 30 years. Low cost: Compared with electrochemical energy storage, it is more economical in thermal energy scenarios, and the investment payback period is shortened to 4 years. Environmental protection: Zero carbon emissions, in line with the "dual carbon" goal.

[0039] Photovoltaic power generation uses the photovoltaic effect to directly convert solar energy into electrical energy. The core component is the solar cell, which is made of semiconductor materials (such as silicon). When photons hit the semiconductor pn junction, electron-hole pairs are generated, which separate under the action of the internal electric field to form an electric current. The photovoltaic system consists of battery components, controllers, and inverters, and can be connected to the grid or off-grid.

[0040] Application Areas

[0041] Residential electricity: Household rooftop photovoltaic systems meet daily electricity needs, and excess electricity can be connected to the grid, such as a rural household project in Zhejiang.

[0042] Commercial buildings: Shopping malls and office buildings use rooftop photovoltaics to reduce operating costs and improve their environmental image.

[0043] Industry and energy: Factories and oil fields use photovoltaics to reduce electricity costs, such as the Northwest Photovoltaic Hydrogen Production Project.

[0044] Public facilities: Photovoltaic street lights and traffic lights improve energy self-sufficiency, such as city signal lights.

[0045] Agriculture and fishery: Power supply for greenhouses and fishery equipment, solving the problem of electricity use in remote areas. Portable equipment: Solar chargers, flashlights, etc. to meet the needs of outdoor activities.

[0046] Advantages: Clean and renewable: No emissions, no noise, environmentally friendly. Widely distributed: Not restricted by regions, can supply power nearby. Low maintenance cost: No mechanical components, with a service life of 20 - 35 years. Short construction period: Quick deployment, strong adaptability.

[0047] Disadvantages: Intermittency: Dependent on sunlight, power generation is limited at night and in rainy or cloudy weather. High initial investment: The cost is 3 - 15 times that of conventional power generation, and although it is continuously decreasing, it is still relatively high. Low energy density: The power generation per unit area is limited, and large - area installation is required. Region - dependent: It works better in areas with rich sunlight resources.

[0048] Reference Figure 1 , the small - reactor multi - unit industrial steam supply system described in the present invention includes a small - reactor multi - unit combined supply system I, a molten - salt heat storage system II, and a photovoltaic power generation system III along the way. Among them, the molten - salt heat storage system II is connected to the small - reactor multi - unit combined supply system I and the photovoltaic power generation system III along the way.

[0049] The small - reactor multi - unit combined supply system I includes a steam supply main pipe 3 and a number of reactor modules. Among them, each reactor module includes a small - scale heating reactor 1 and a steam heat exchange system 2. Among them, in the same reactor module, the outlet of the heat absorption side of the steam heat exchange system 2 is connected to the steam supply main pipe 3 through a first valve, the outlet of the small - scale heating reactor 1 is connected to the inlet of the heat release side of the steam heat exchange system 2 through a second valve, and the outlet of the heat release side of the steam heat exchange system 2 is connected to the inlet of the small - scale heating reactor 1 through a third valve and a medium pump;

[0050] The reactor modules are connected in series in sequence. Among them, the outlet of the small - scale heating reactor 1 in the previous reactor module is connected to the inlet of the heat release side of the steam heat exchange system 2 in the next reactor module through a fourth valve, and the inlet of the medium pump in the previous reactor module is connected to the outlet of the heat release side of the steam heat exchange system 2 in the next reactor module through a fifth valve.

[0051] Preferably, the number of the reactor modules is five, and they adopt a parallel operation mode of four main and one standby. When any one of the four main reactor modules needs to be overhauled or an accident occurs, the standby reactor module is started.

[0052] The molten salt thermal energy storage system II includes a high-temperature molten salt tank 4, a high-temperature molten salt pump 5, a #1 molten salt heat exchanger 6, a #2 molten salt heat exchanger 7, a low-temperature molten salt tank 8, a low-temperature molten salt pump 9, and a molten salt heater 10. Among them, the outlet of the steam supply main pipe 3 is successively connected to the inlet of the distributed photovoltaic power generation system III through the shell side of the #1 molten salt heat exchanger 6 and the shell side of the #2 molten salt heat exchanger 7. The outlet of the tube side of the #1 molten salt heat exchanger 6 is successively connected to the inlet of the high-temperature molten salt pump 5 through the low-temperature molten salt tank 8, the low-temperature molten salt pump 9, the molten salt heater 10, and the high-temperature molten salt tank 4. The outlet of the high-temperature molten salt pump 5 is divided into two paths after passing through the sixth valve. One path is connected to the inlet of the tube side of the #1 molten salt heat exchanger 6 through the seventh valve, and the other path is connected to the inlet of the tube side of the #1 molten salt heat exchanger 6 through the #2 molten salt heat exchanger 7.

[0053] When the grid electricity price is low at night, the molten salt heater 10 is turned on. The low-temperature molten salt in the low-temperature molten salt tank 8 enters the molten salt heater 10 through the low-temperature molten salt pump 9 and is heated to become high-temperature molten salt. The thermal energy is stored in the high-temperature molten salt tank 4 through the high-temperature molten salt working medium to respond to the grid's night valley filling demand. The saturated steam output from the steam supply main pipe 3 enters the shell sides of the #1 molten salt heat exchanger 6 and the #2 molten salt heat exchanger 7 to be heated to superheated steam, avoiding the pipeline vibration and the corrosion of the compressor 13 caused by the subsequent steam becoming a vapor-liquid two-phase flow after long-distance heat dissipation along the pipeline.

[0054] The distributed photovoltaic power generation system III includes several photovoltaic power generation modules. The outlet of the tube side of the #2 molten salt heat exchanger 7 is successively connected to the chemical industrial park users 14 through the compressors 13 in each photovoltaic power generation module.

[0055] Each photovoltaic power generation module includes an energy storage battery 11, a photovoltaic power generation device 12, and a compressor 13. Among them, the output end of the photovoltaic power generation device 12 is connected to the energy storage battery 11 and the compressor 13.

[0056] Preferably, the number of the photovoltaic power generation modules is three. The compression ratios of the compressors 13 in the three photovoltaic power generation modules are 1.5, 1.4, and 1.2 respectively, compressing the steam step by step to increase the temperature and pressure of the steam to offset the pipeline frictional loss. The temperature drop of the superheated steam along the distributed photovoltaic power generation system III is 2 °C / km, the pressure drop is 0.02 - 0.025 MPa / km, and the steam supply distance is 40 km.

[0057] When the daylight condition is good during the day, the distributed photovoltaic power generation devices 12 drive the compressors 13 to operate, and the extra electric energy is stored in the energy storage battery 11. When the daylight condition is poor at night, the energy storage battery 11 drives the compressor 13 to operate to maximize the utilization of the distributed photovoltaic resources.

[0058] The present invention combines a small-sized pressurized water reactor multi-unit combined supply system with a photovoltaic power generation and molten salt energy storage system II to supply medium-pressure industrial steam at 3.5 MPa and 380 °C to industrial park users, provide a clean energy solution for the petrochemical park scenario, support its green and low-carbon development, and at the same time respond to the policy requirements of the country for energy conservation, emission reduction, and energy structure optimization.

[0059] Those skilled in the art will readily conceive of other embodiments of the present invention upon considering the specification and the disclosure of the invention. This application is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present invention and include known common knowledge or conventional technical means in the technical field not disclosed by the present invention. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present invention are pointed out by the following claims.

[0060] It should be understood that the present invention is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present invention is only limited by the appended claims.

[0061] The above are only the preferred embodiments of the present invention, and do not impose any limitations on the present invention. Any simple modifications, changes, and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A small heap multi-unit industrial steam supply system, characterized in that, It includes a small reactor multi-unit combined heat and power supply system (Ⅰ), a molten salt thermal energy storage system (Ⅱ) and a distributed photovoltaic power generation system (Ⅲ). Among them, the molten salt thermal energy storage system (Ⅱ) is connected to the small reactor multi-unit combined heat and power supply system (Ⅰ) and the distributed photovoltaic power generation system (Ⅲ).

2. The small modular reactor multi-unit industrial steam supply system according to claim 1, wherein The small reactor multi-unit combined heat and power supply system (Ⅰ) includes a steam supply main pipe (3) and several reactor modules. Each reactor module includes a small-scale heating reactor (1) and a steam heat exchange system (2). In the same reactor module, the outlet of the heat absorption side of the steam heat exchange system (2) is connected to the steam supply main pipe (3) through a first valve, the outlet of the small-scale heating reactor (1) is connected to the inlet of the heat release side of the steam heat exchange system (2) through a second valve, and the outlet of the heat release side of the steam heat exchange system (2) is connected to the inlet of the small-scale heating reactor (1) through a third valve and a medium pump.

3. The small modular reactor multi-unit industrial steam supply system according to claim 2, wherein The reactor modules are connected in series in sequence. Among them, the outlet of the small-scale heating reactor (1) in the previous reactor module is connected to the inlet of the heat release side of the steam heat exchange system (2) in the next reactor module through a fourth valve, and the inlet of the medium pump in the previous reactor module is connected to the outlet of the heat release side of the steam heat exchange system (2) in the next reactor module through a fifth valve.

4. The small modular reactor multi-unit industrial steam supply system according to claim 2, wherein The number of the reactor modules is five, and they adopt a parallel operation mode of four main units and one standby unit.

5. The small modular reactor multi-unit industrial steam supply system according to claim 1, characterized in that, The molten salt thermal energy storage system (Ⅱ) includes a high-temperature molten salt tank (4), a high-temperature molten salt pump (5), #1 molten salt heat exchanger (6), #2 molten salt heat exchanger (7), a low-temperature molten salt tank (8), a low-temperature molten salt pump (9) and a molten salt heater (10). Among them, the outlet of the steam supply main pipe (3) is connected to the inlet of the distributed photovoltaic power generation system (Ⅲ) through the shell side of the #1 molten salt heat exchanger (6) and the shell side of the #2 molten salt heat exchanger (7) in sequence. The outlet of the tube side of the #1 molten salt heat exchanger (6) is connected to the inlet of the high-temperature molten salt pump (5) through the low-temperature molten salt tank (8), the low-temperature molten salt pump (9), the molten salt heater (10) and the high-temperature molten salt tank (4) in sequence. The outlet of the high-temperature molten salt pump (5) is divided into two paths after passing through a sixth valve. One path is connected to the inlet of the tube side of the #1 molten salt heat exchanger (6) through a seventh valve, and the other path is connected to the inlet of the tube side of the #1 molten salt heat exchanger (6) through the #2 molten salt heat exchanger (7).

6. The small modular reactor multi-unit industrial steam supply system according to claim 5, characterized in that When the grid electricity price is low at night, the molten salt heater (10) is turned on. The low-temperature molten salt in the low-temperature molten salt tank (8) enters the molten salt heater (10) through the low-temperature molten salt pump (9) and is heated to become high-temperature molten salt. The thermal energy is stored in the high-temperature molten salt tank (4) through the high-temperature molten salt working medium.

7. The small modular reactor multi-unit industrial steam supply system according to claim 1, characterized in that, The distributed photovoltaic power generation system Ⅲ includes several photovoltaic power generation modules. The outlet of the tube side of the #2 molten salt heat exchanger (7) is connected to the chemical industrial park users (14) through the compressors (13) in each photovoltaic power generation module in sequence.

8. The small modular reactor multi-unit industrial steam supply system according to claim 7, characterized in that, Each photovoltaic power generation module includes an energy storage battery (11), a photovoltaic power generation device (12) and a compressor (13). Among them, the output end of the photovoltaic power generation device (12) is connected to the energy storage battery (11) and the compressor (13).

9. The small modular reactor multi-unit industrial steam supply system according to claim 7, characterized in that, The number of the photovoltaic power generation modules is three, and the compression ratios of the compressors (13) in the three photovoltaic power generation modules are 1.5, 1.4, and 1.2 respectively.

10. The small modular reactor multi-unit industrial steam supply system according to claim 7, characterized in that, When the daytime lighting conditions are good, the photovoltaic power generation devices (12) deployed along the way drive the compressors (13) to operate, and the extra electric energy is stored in the energy storage battery (11). When the nighttime lighting conditions are poor, the energy storage battery (11) drives the compressors (13) to operate, maximizing the utilization of the photovoltaic resources along the way.

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