Industrial park-oriented energy comprehensive utilization system

Abstract

The invention relates to the technical field of electric energy storage and utilization, and discloses an industrial park-oriented energy comprehensive utilization system, which comprises a photovoltaic power generation array, an inversion device and a power grid, and is characterized in that the inversion device is connected with the photovoltaic power generation array and the power grid; the photovoltaic power generation array is used for converting solar energy into direct current and transmitting the direct current to the inversion equipment; the inversion equipment is used for converting the direct current into alternating current and transmitting the alternating current to the power grid; the energy comprehensive utilization system further comprises an energy coordination platform, the energy coordination platform is connected with the inversion equipment, the refrigeration demand enterprise, the heating demand enterprise and the power plant, and the energy coordination platform is used for receiving alternating current output by the inversion equipment and converting and storing the alternating current. And cold is supplied to the refrigeration demand enterprise, heat is supplied to the heating demand enterprise, and heat energy is supplied to the power plant. The comprehensive energy utilization efficiency and the energy supply stability of the industrial park are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of electrical energy storage and utilization technology, and more specifically, to an integrated energy utilization system for industrial parks. Background Technology

[0002] As industrial parks expand and industrial upgrading progresses steadily, various business sectors within these parks are placing demands on energy quality and stability. To address the diverse energy needs of industrial parks, different energy supply infrastructures, including cooling, heating, and electricity, are required. There are conditions for complementary optimization of comprehensive energy utilization efficiency. Furthermore, under carbon reduction requirements, it is not advisable to build an energy supply system primarily based on fossil fuels. If such systems are constructed, large-scale photovoltaic power plants often generate more electricity than the industrial park's business sectors require under sufficient sunshine conditions, resulting in excess power being wasted. Conversely, under insufficient sunshine conditions or at night, photovoltaic power generation is prone to fluctuations and even intermittent interruptions, compromising energy supply stability. Summary of the Invention

[0003] The technical objective of this invention is to address the shortcomings of the prior art by providing an energy comprehensive utilization system for industrial parks that effectively improves the comprehensive energy utilization efficiency and energy supply stability of industrial parks.

[0004] The technical solution adopted in this invention is as follows: An integrated energy utilization system for industrial parks includes a photovoltaic power generation array, an inverter, and a power grid. The inverter is connected to both the photovoltaic power generation array and the power grid. The photovoltaic power generation array converts solar energy into direct current (DC) and transmits it to the inverter. The inverter converts the DC power into alternating current (AC) and transmits it to the power grid. The comprehensive energy utilization system also includes an energy coordination platform, which is connected to the inverter equipment, cooling demand enterprises, heating demand enterprises, and power plants. The energy coordination platform is used to receive the AC power output by the inverter equipment, convert and store it, and provide cooling to cooling demand enterprises, heating to heating demand enterprises, and thermal energy to power plants.

[0005] The aforementioned technical measures, tailored to the specific characteristics of industrial parks, are based on photovoltaic power generation. Through an energy coordination platform, surplus photovoltaic power can be utilized when there is sufficient sunshine, avoiding curtailment and effectively improving energy utilization efficiency. The energy coordination platform can also provide multi-energy output, converting electrical energy into heat, cold, and other energy sources, achieving complementary supply of multiple energy sources. This helps avoid redundant construction and inefficient use of energy facilities, effectively improving the overall efficiency of energy utilization. At the same time, it can meet the energy supply needs of industrial parks for extended periods, helping to overcome the intermittency and volatility of photovoltaic power generation and effectively improving energy supply stability.

[0006] Furthermore, the energy coordination platform includes an electric motor, a compressor, a hot molten salt tank, a cold molten salt tank, a gas-molten salt heat exchanger, a cooling module, a heating module, and a steam module; The cold melt salt container contains molten salt; The electric motor is connected to the inverter; the compressor is connected to both the electric motor and the molten salt heat exchanger; the molten salt heat exchanger is connected to the cooling module, the hot molten salt tank, and the cold molten salt tank; the heating module is connected to both the heating demand enterprise and the hot molten salt tank; the steam module is connected to both the power plant and the hot molten salt tank; and the cooling module is connected to the cooling demand enterprise. The electric motor is used to receive the alternating current output from the inverter to drive the compressor; The compressor is used to receive the gaseous working fluid and compress it, and then deliver the compressed gaseous working fluid to the gas-molten salt heat exchanger. The gas-molten salt heat exchanger is used to receive the gaseous working fluid delivered by the compressor and the molten salt in the cold molten salt tank and exchange heat, then deliver the molten salt after heat exchange to the hot molten salt tank and the gaseous working fluid after heat exchange to the cooling module. The cooling module is used to receive the gaseous working fluid delivered by the gas molten salt heat exchanger, expand and cool it, and then deliver the expanded and cooled gaseous working fluid to the enterprise requiring cooling. The heating module is used to receive molten salt in the hot molten salt tank, release the heat of the molten salt and deliver it to the enterprise with heating demand; The steam module is used to receive water and molten salt in a hot molten salt tank, release the heat of the molten salt to heat the water into steam and deliver it to the power plant.

[0007] The above-mentioned technical measures transmit electrical energy to the motor through the inverter equipment, which drives the compressor to compress the gaseous working fluid to a high temperature and high pressure state. The gaseous working fluid and molten salt exchange heat through the gas-molten salt heat exchanger, thereby heating the molten salt. The heat from the heated molten salt can be used to provide energy for enterprises with heating needs and power plants, while the gaseous working fluid after heat exchange can provide energy for enterprises with cooling needs, realizing complementary supply of multiple energy sources and effectively improving the comprehensive energy utilization efficiency.

[0008] Furthermore, the compressor is also connected to a storage tank containing a gaseous working fluid, which is used to supply the gaseous working fluid to the compressor.

[0009] Furthermore, the cooling module includes a gas-to-gas heat exchanger and a turbine; The gas-to-gas heat exchanger is connected to both the gas-molten salt heat exchanger and the turbine; the turbine is connected to the enterprise requiring refrigeration. During the startup phase, the gas-to-gas heat exchanger is used to receive the gaseous working fluid delivered by the gas-molten salt heat exchanger and deliver it to the turbine. The turbine is used to receive the gaseous working fluid delivered by the gas-to-gas heat exchanger and expand it to do work, and then deliver the expanded gaseous working fluid to the enterprise with refrigeration needs.

[0010] In the above-mentioned technical measures, after the gaseous working fluid enters the turbine, it expands and does work in the flow channel formed by the nozzle and the moving blade. During the expansion process, the internal energy of the gaseous working fluid is converted into the mechanical energy of the turbine rotor, thereby reducing the pressure and temperature of the gaseous working fluid itself.

[0011] Furthermore, the gas-to-gas heat exchanger is also connected to a compressor; During steady-state operation, the gas-to-gas heat exchanger is used to receive the gaseous working fluid supplied by the gas-molten salt heat exchanger and the gaseous working fluid supplied by the refrigeration demand enterprise and exchange heat. The gaseous working fluid supplied by the gas-molten salt heat exchanger after heat exchange is then supplied to the turbine, and the gaseous working fluid supplied by the refrigeration demand enterprise after heat exchange is then supplied to the compressor.

[0012] The above-mentioned technical measures connect the gas-to-gas heat exchanger to the compressor to realize the recycling of the gaseous working fluid and improve energy utilization.

[0013] Furthermore, the heating module includes a molten salt heating heat exchanger; The molten salt heating heat exchanger is connected to the heating demand enterprise and the hot molten salt tank, respectively. The molten salt heating heat exchanger is connected to the heating demand enterprise through a pipeline, and the pipeline is pre-stored with a gaseous working fluid. In the initial stage, the molten salt heat exchanger is used to receive molten salt in the hot molten salt tank and gaseous working fluid pre-stored in the pipeline and exchange heat, and then transport the gaseous working fluid after heat exchange to the enterprise with heating demand. During the stable phase, the molten salt heat exchanger is used to receive molten salt from the hot molten salt tank and gaseous working fluid supplied by the heating demand enterprise and exchange heat, and then transport the gaseous working fluid after heat exchange to the heating demand enterprise.

[0014] The above-mentioned technical measures enable the recycling of gaseous working fluid by supplying gaseous working fluid to molten salt heat exchangers from enterprises with heating needs, thereby improving energy utilization efficiency.

[0015] Furthermore, the molten salt heating heat exchanger is also connected to a cold molten salt tank; The molten salt heating heat exchanger is also used to transport the molten salt after releasing heat to the cold molten salt tank.

[0016] The above-mentioned technical measures connect the molten salt heating heat exchanger to the cold molten salt tank to realize the recycling of molten salt and improve energy utilization.

[0017] Furthermore, the steam module includes a molten salt steam generator; The molten salt steam generator is connected to the power plant and the hot molten salt tank, respectively. The molten salt steam generator is used to receive water and molten salt from a hot molten salt tank supplied by the power plant, release the heat of the molten salt to heat the water into steam and supply it to the power plant.

[0018] Furthermore, the molten salt steam generator is also connected to a cold molten salt tank; The molten salt steam generator is also used to transport the molten salt after releasing heat to the cold molten salt tank.

[0019] The above-mentioned technical measures connect the molten salt steam generator to the cold molten salt tank to realize the recycling of molten salt and improve energy utilization.

[0020] Furthermore, the power plant is connected to the power grid.

[0021] One or more technical solutions provided by this invention have at least the following technical effects or advantages: This invention addresses the specific needs of industrial parks by using photovoltaic (PV) power generation as a foundation. Through an energy coordination platform, it enables the utilization of surplus PV power during periods of ample sunshine, preventing curtailment and effectively improving energy efficiency. The platform also provides multi-energy output, converting electrical energy into heat, cooling, and other forms of energy, achieving complementary supply of multiple energy sources. This helps avoid redundant construction and inefficient use of energy facilities, effectively improving overall energy utilization efficiency. Furthermore, it can meet the energy needs of industrial parks for extended periods, overcoming the intermittency and volatility of PV power generation and significantly improving energy supply stability.

[0022] This invention enables zero-carbon emission energy supply with a clear carbon trajectory, aligns with international green trade rules, and effectively enhances overall competitiveness. Attached Figure Description

[0023] The accompanying drawings, which are provided to further illustrate embodiments of the invention and constitute a part of this invention, are not intended to limit the scope of the invention. Figure 1 This is a schematic diagram of the structure of the present invention; Among them, 1-Photovoltaic power generation array; 2-Inverter equipment; 3-Power grid; 4-Energy coordination platform; 5-Cooling demand enterprises; 6-Power plant; 7-Electric motor; 8-Compressor; 9-Hot molten salt tank; 10-Cold molten salt tank; 11-Gas molten salt heat exchanger; 12-Gas-to-gas heat exchanger; 13-Turbine machine; 14-Molten salt heating heat exchanger; 15-Molten salt steam generator; 16-Heating demand enterprises. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments of the present invention and the features thereof can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0026] Reference Figure 1 This embodiment provides an energy integrated utilization system for industrial parks. The energy integrated utilization system includes a photovoltaic power generation array 1, an inverter device 2, and a power grid 3. The inverter device 2 is connected to the photovoltaic power generation array 1 and the power grid 3 respectively. The photovoltaic power generation array 1 is used to convert solar energy into direct current and transmit it to the inverter device 2. The inverter device 2 is used to convert direct current into alternating current and transmit it to the power grid 3. The integrated energy utilization system also includes an energy coordination platform 4, which is connected to the inverter equipment 2, the cooling demand enterprise 5, the heating demand enterprise 16, and the power plant 6. The energy coordination platform 4 is used to receive the AC power output by the inverter equipment 2, convert and store it, and supply cooling to the cooling demand enterprise 5, heating to the heating demand enterprise 16, and heat energy to the power plant 6.

[0027] Among them, power plant 6 is connected to power grid 3.

[0028] The energy coordination platform 4 includes an electric motor 7, a compressor 8, a hot molten salt tank 9, a cold molten salt tank 10, a gas-molten salt heat exchanger 11, a cooling module, a heating module, and a steam module; The cold molten salt container 10 contains molten salt; The electric motor 7 is connected to the inverter 2; the compressor 8 is connected to the electric motor 7 and the gas-molten salt heat exchanger 11; the gas-molten salt heat exchanger 11 is connected to the cooling module, the hot molten salt tank 9 and the cold molten salt tank 10; the heating module is connected to the heating demand enterprise 16 and the hot molten salt tank 9; the steam module is connected to the power plant 6 and the hot molten salt tank 9; the cooling module is connected to the cooling demand enterprise 5. The electric motor 7 is used to receive the AC power output from the inverter 2 to drive the compressor 8; The compressor 8 is used to receive the gaseous working fluid and compress it, and then deliver the compressed gaseous working fluid to the gas-molten salt heat exchanger 11. The gas-molten salt heat exchanger 11 is used to receive the gaseous working fluid delivered by the compressor 8 and the molten salt in the cold molten salt tank 10 and exchange heat, and then deliver the molten salt after heat exchange to the hot molten salt tank 9 and the gaseous working fluid after heat exchange to the cooling module. The cooling module is used to receive the gaseous working fluid delivered by the gas molten salt heat exchanger 11 and expand and cool it, and then deliver the expanded and cooled gaseous working fluid to the cooling demand enterprise 5. The heating module is used to receive molten salt in the hot molten salt tank 9, release the heat of the molten salt and deliver it to the enterprise 16 with heating demand; The steam module is used to receive water and molten salt in the hot molten salt tank 9, release the heat of the molten salt to heat the water into steam and deliver it to the power plant 6.

[0029] The compressor 8 is also connected to a storage tank containing a gaseous working fluid, which is used to supply the gaseous working fluid to the compressor 8.

[0030] The gaseous working medium can be carbon dioxide, air, nitrogen, etc.

[0031] The cooling module includes a gas-to-gas heat exchanger 12 and a turbine 13; Gas-to-gas heat exchanger 12 is connected to gas-molten salt heat exchanger 11 and turbine 13 respectively; turbine 13 is connected to refrigeration demand enterprise 5. During the start-up phase, the gas-to-gas heat exchanger 12 is used to receive the gaseous working fluid delivered by the gas-molten salt heat exchanger 11 and deliver it to the turbine 13. Turbine 13 is used to receive the gaseous working fluid delivered by gas-to-gas heat exchanger 12 and expand it to do work, and then deliver the expanded gaseous working fluid to the refrigeration demand enterprise 5.

[0032] The gas-to-gas heat exchanger 12 is also connected to the compressor 8; During steady-state operation, the gas-to-gas heat exchanger 12 is used to receive the gaseous working fluid delivered by the gas-molten salt heat exchanger 11 and the gaseous working fluid delivered by the refrigeration demand enterprise 5 and exchange heat. The gaseous working fluid delivered by the gas-molten salt heat exchanger 11 after heat exchange is delivered to the turbine 13, and the gaseous working fluid delivered by the refrigeration demand enterprise 5 after heat exchange is delivered to the compressor 8.

[0033] The heating module includes a molten salt heating heat exchanger 14; The molten salt heating heat exchanger 14 is connected to the heating demand enterprise 16 and the hot molten salt tank 9, respectively. The molten salt heating heat exchanger 14 is connected to the heating demand enterprise 16 through a pipeline, and the pipeline is pre-stored with a gaseous working fluid (such as water vapor); specifically, a working fluid pump is installed on the pipeline to drive the movement of the gaseous working fluid.

[0034] In the initial stage, the molten salt heating heat exchanger 14 is used to receive molten salt in the hot molten salt tank 9 and gaseous working fluid pre-stored in the pipeline and exchange heat, and then transport the gaseous working fluid after heat exchange to the heating demand enterprise 16. During the stable phase, the molten salt heating heat exchanger 14 is used to receive molten salt in the hot molten salt tank 9 and gaseous working fluid delivered by the heating demand enterprise 16 and exchange heat, and then deliver the gaseous working fluid after heat exchange to the heating demand enterprise 16.

[0035] Molten salt heating heat exchanger 14 is also connected to cold molten salt tank 10; The molten salt heating heat exchanger 14 is also used to transport the molten salt after releasing heat to the cold molten salt tank 10.

[0036] The steam module includes a molten salt steam generator 15; The molten salt steam generator 15 is connected to the power plant 6 and the hot molten salt tank 9, respectively. Molten salt steam generator 15 is used to receive water and molten salt from hot molten salt tank 9 delivered by power plant 6, release the heat of molten salt to heat water into steam and deliver it to power plant 6.

[0037] The molten salt steam generator 15 is also connected to the cold molten salt tank 10; Molten salt steam generator 15 is also used to transport the molten salt after releasing heat to cold molten salt tank 10.

[0038] When sunlight is abundant, the photovoltaic array 1 converts solar energy into direct current (DC). This DC is then collected (using common combiner devices such as combiner boxes) and sent to the inverter 2, which converts it into alternating current (AC). The output of the inverter 2 is split into two paths: one path is sent to the grid 3 for grid connection, and the other path is sent to the motor 7 of the energy coordination platform 4. The motor 7 drives the compressor 8, which obtains a gaseous working fluid from the storage tank and compresses it. After compressing the gaseous working fluid to a high temperature and pressure state, it is sent to the gas-molten salt heat exchanger 11. The gas-molten salt heat exchanger 11 receives molten salt from the cold molten salt tank 10 and exchanges heat between the molten salt in the cold molten salt tank 10 and the gaseous working fluid to heat the molten salt. After the heat exchange, the gas-molten salt heat exchanger 11 sends the molten salt to the hot molten salt tank 9 and the gaseous working fluid (temperature greater than or equal to 300℃) to the gas-gas heat exchanger 12. In the initial stage (i.e., the operation stage before the refrigeration demand enterprise 5 delivers gaseous working fluid to the gas-to-gas heat exchanger 12), the gas-to-gas heat exchanger 12 delivers the gaseous working fluid delivered by the gas molten salt heat exchanger 11 to the turbine 13 to perform work, changing the gaseous working fluid to a low temperature and low pressure state, and then delivering it to the refrigeration demand enterprise 5 to achieve cooling. In the refrigeration demand enterprise 5, the gaseous working fluid is heated (temperature approximately 20°C) and delivered to the gas-to-gas heat exchanger 12. In the steady-state operation stage (i.e., the operation stage when the refrigeration demand enterprise 5 delivers gaseous working fluid to the gas-to-gas heat exchanger 12), the gas-to-gas heat exchanger 12 receives the gaseous working fluid delivered by the gas molten salt heat exchanger 11 and the gaseous working fluid delivered by the refrigeration demand enterprise 5 and performs heat exchange. The gaseous working fluid delivered by the gas molten salt heat exchanger 11 after heat exchange is delivered to the turbine 13, and the gaseous working fluid delivered by the refrigeration demand enterprise 5 after heat exchange is delivered to the compressor 8, realizing the recycling of the gaseous working fluid. When sunlight is insufficient or at night, the photovoltaic power generation array 1 outputs insufficient or no electricity. When the heating demand enterprise 16 needs heating, in the initial stage (i.e., the operation stage before the heating demand enterprise 16 has delivered gaseous working fluid to the molten salt heat exchanger 14), the molten salt heat exchanger 14 receives molten salt from the hot molten salt tank 9 and the gaseous working fluid pre-stored in the pipeline connecting the molten salt heat exchanger 14 and the heating demand enterprise 16. The molten salt heat exchanger 14 then mixes the gaseous working fluid with the hot molten salt. The molten salt in tank 9 undergoes heat exchange to heat the gaseous working fluid. After heat exchange, the molten salt heat exchanger 14 delivers the heat-exchanged gaseous working fluid to the heating-demanding enterprise 16 to provide heat. The molten salt heat exchanger 14 also delivers the heat-exchanged molten salt to the cold molten salt tank 10, achieving molten salt recycling. In the heating-demanding enterprise 16, the gaseous working fluid is cooled and then delivered to the molten salt heat exchanger 14. During the stable phase (i.e., the heating-demanding enterprise 16 supplies heat to the molten salt heat exchanger...), the gaseous working fluid is cooled and then delivered to the molten salt heat exchanger 14. (14) During the operation phase of transporting gaseous working fluid, the molten salt heat exchanger 14 receives molten salt from the hot molten salt tank 9 and gaseous working fluid supplied by the heating demand enterprise 16. The molten salt heat exchanger 14 exchanges heat between the gaseous working fluid and the molten salt in the hot molten salt tank 9 to heat the gaseous working fluid. After the heat exchange, the molten salt heat exchanger 14 transports the heat-exchanged gaseous working fluid to the heating demand enterprise 16, and then transports the heat-exchanged molten salt to the cold molten salt tank 10, realizing the recycling of gaseous working fluid and molten salt. When the power grid 3 needs electricity, the molten salt in the hot molten salt tank 9 can be transported to the molten salt steam generator 15. The molten salt steam generator 15 receives water supplied by the power plant 6 and molten salt in the hot molten salt tank 9, releases the heat of the molten salt to heat the water into high-temperature steam and transports it to the power plant 6, and then transports the molten salt after releasing the heat to the cold molten salt tank 10, realizing the recycling of molten salt. The high-temperature steam is converted into electricity in the power plant 6 and transported to the power grid 3 for grid connection.

[0039] The energy integrated utilization system in this embodiment is not limited to industrial parks, but can also absorb green electricity from the grid, providing flexible adjustment resources for grid 3.

[0040] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0041] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An energy integrated utilization system for industrial parks, the energy integrated utilization system comprising a photovoltaic power generation array (1), an inverter device (2) and a power grid (3), wherein the inverter device (2) is connected to the photovoltaic power generation array (1) and the power grid (3) respectively, the photovoltaic power generation array (1) is used to convert solar energy into direct current and transmit it to the inverter device (2), and the inverter device (2) is used to convert the direct current into alternating current and transmit it to the power grid (3); Its features are: The energy integrated utilization system also includes an energy coordination platform (4), which is connected to the inverter (2), the cooling demand enterprise (5), the heating demand enterprise (16), and the power plant (6). The energy coordination platform (4) is used to receive the AC power output by the inverter (2), convert and store it, supply cooling to the cooling demand enterprise (5), supply heating to the heating demand enterprise (16), and provide heat energy to the power plant (6).

2. The comprehensive energy utilization system for industrial parks according to claim 1, characterized in that: The energy coordination platform (4) includes an electric motor (7), a compressor (8), a hot molten salt tank (9), a cold molten salt tank (10), a gas molten salt heat exchanger (11), a cooling module, a heating module, and a steam module; The cold molten salt container (10) contains molten salt; The electric motor (7) is connected to the inverter (2); the compressor (8) is connected to the electric motor (7) and the gas molten salt heat exchanger (11); the gas molten salt heat exchanger (11) is connected to the cooling module, the hot molten salt tank (9) and the cold molten salt tank (10); the heating module is connected to the heating demand enterprise (16) and the hot molten salt tank (9); the steam module is connected to the power plant (6) and the hot molten salt tank (9); the cooling module is connected to the cooling demand enterprise (5). The electric motor (7) is used to receive the alternating current output from the inverter (2) to drive the compressor (8). The compressor (8) is used to receive the gaseous working medium and compress it, and deliver the compressed gaseous working medium to the gas molten salt heat exchanger (11). The gas-molten salt heat exchanger (11) is used to receive the gaseous working fluid delivered by the compressor (8) and the molten salt in the cold molten salt tank (10) and exchange heat, and deliver the molten salt after heat exchange to the hot molten salt tank (9) and the gaseous working fluid after heat exchange to the cooling module. The cooling module is used to receive the gaseous working fluid delivered by the gas molten salt heat exchanger (11) and expand and cool it down, and then deliver the expanded and cooled gaseous working fluid to the cooling demand enterprise (5). The heating module is used to receive molten salt in the hot molten salt tank (9), release the heat of the molten salt and deliver it to the enterprise (16) with heating demand. The steam module is used to receive water and molten salt in a hot molten salt tank (9), release the heat of the molten salt to heat the water into steam and deliver it to the power plant (6).

3. The comprehensive energy utilization system for industrial parks according to claim 2, characterized in that: The compressor (8) is also connected to a storage tank containing a gaseous working fluid, which is used to supply the gaseous working fluid to the compressor (8).

4. The comprehensive energy utilization system for industrial parks according to claim 2, characterized in that: The cooling module includes a gas-to-gas heat exchanger (12) and a turbine (13). The gas-to-gas heat exchanger (12) is connected to the gas-molten salt heat exchanger (11) and the turbine (13) respectively; the turbine (13) is connected to the refrigeration demand enterprise (5); During the start-up phase, the gas-to-gas heat exchanger (12) is used to receive the gaseous working fluid delivered by the gas-molten salt heat exchanger (11) and deliver it to the turbine (13). The turbine (13) is used to receive the gaseous working fluid delivered by the gas-to-gas heat exchanger (12) and expand it to do work, and then deliver the expanded gaseous working fluid to the enterprise with refrigeration demand (5).

5. The comprehensive energy utilization system for industrial parks according to claim 4, characterized in that: The gas-to-gas heat exchanger (12) is also connected to the compressor (8); During steady-state operation, the gas-to-gas heat exchanger (12) is used to receive the gaseous working fluid delivered by the gas molten salt heat exchanger (11) and the gaseous working fluid delivered by the refrigeration demand enterprise (5) and exchange heat. The gaseous working fluid delivered by the gas molten salt heat exchanger (11) after heat exchange is delivered to the turbine (13), and the gaseous working fluid delivered by the refrigeration demand enterprise (5) after heat exchange is delivered to the compressor (8).

6. The comprehensive energy utilization system for industrial parks according to claim 2, characterized in that: The heating module includes a molten salt heating heat exchanger (14). The molten salt heating heat exchanger (14) is connected to the heating demand enterprise (16) and the hot molten salt tank (9) respectively; The molten salt heating heat exchanger (14) is connected to the heating demand enterprise (16) through a pipeline, and the pipeline contains a gaseous working fluid. In the initial stage, the molten salt heat exchanger (14) is used to receive the molten salt in the hot molten salt tank (9) and the gaseous working medium pre-stored in the pipeline and exchange heat, and then transport the gaseous working medium after heat exchange to the heating demand enterprise (16). During the stabilization phase, the molten salt heat exchanger (14) is used to receive the molten salt in the hot molten salt tank (9) and the gaseous working medium delivered by the heating demand enterprise (16) and exchange heat, and then deliver the gaseous working medium after heat exchange to the heating demand enterprise (16).

7. The comprehensive energy utilization system for industrial parks according to claim 6, characterized in that: The molten salt heating heat exchanger (14) is also connected to the cold molten salt tank (10); The molten salt heating heat exchanger (14) is also used to transport the molten salt after releasing heat to the cold molten salt tank (10).

8. The comprehensive energy utilization system for industrial parks according to claim 2, characterized in that: The steam module includes a molten salt steam generator (15); The molten salt steam generator (15) is connected to the power plant (6) and the hot molten salt tank (9) respectively; The molten salt steam generator (15) is used to receive water and molten salt from the hot molten salt tank (9) delivered by the power plant (6), release the heat of the molten salt to heat the water into steam and deliver it to the power plant (6).

9. The comprehensive energy utilization system for industrial parks according to claim 8, characterized in that: The molten salt steam generator (15) is also connected to the cold molten salt tank (10); The molten salt steam generator (15) is also used to transport the molten salt after releasing heat to the cold molten salt tank (10).

10. The comprehensive energy utilization system for industrial parks according to claim 1, characterized in that: The power plant (6) is connected to the power grid (3).

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