Novel energy storage power station

Abstract

The invention belongs to the technical field of power stations, and particularly relates to a novel energy storage power station which comprises a photovoltaic power generation mechanism, a photo-thermal energy storage mechanism and a steam power generation mechanism. The photo-thermal energy storage mechanism comprises a fused salt heating assembly connected with the photovoltaic power generation mechanism and a high-temperature fused salt tank connected with the output end of the fused salt heating assembly. The low-temperature molten salt tank is connected with the output end of the high-temperature molten salt tank; the molten salt backflow assembly is used for guiding low-temperature molten salt in the low-temperature molten salt tank into the molten salt heating assembly again during working; the steam power generation mechanism is located on one side of the photo-thermal energy storage mechanism, and when high-temperature fused salt in the high-temperature fused salt tank is discharged into the low-temperature fused salt tank, the steam power generation mechanism is automatically driven to start to work for power generation. And the problems of high maintenance cost and low power generation efficiency in the operation process of the power station are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power stations, and in particular to a new type of energy storage power station. Background Art

[0002] Currently, the main ways to convert solar energy into electrical energy are photovoltaic power stations and solar thermal power stations.

[0003] Photovoltaic power stations operate by converting sunlight directly into electricity through solar cells. However, their efficiency is significantly affected by factors such as weather, season, and sunshine duration. In rainy weather or areas with poor sunlight, the efficiency of photovoltaic systems decreases, making them unable to generate electricity stably around the clock. Most of the electricity generated by photovoltaic systems is concentrated at noon, a time of low electricity demand. Concentrated solar thermal power stations operate by using heliostats to focus sunlight onto a heat sink at the top of a tower. The heat generated is transferred to molten salt within the tower, where it is stored in a high-temperature salt tank. When power generation is needed, the high-temperature molten salt flows from the tank into a steam generator, where it transfers heat to cold water. The water evaporates into high-temperature, high-pressure steam, which drives the turbine blades, converting the heat into mechanical energy. The turbine drives the generator, converting the mechanical energy into electricity, while the low-temperature molten salt flows into the low-temperature salt tank and is then pumped back to the heat sink for the next heating cycle.

[0004] To address the imbalance between supply and demand of photovoltaic power generation, most photovoltaic power stations currently use lithium battery energy storage systems. However, electrochemical energy storage systems such as lithium batteries can typically only meet energy storage needs for 2-4 hours. The lifespan of lithium batteries is typically only 8-10 years, while the lifespan of a photovoltaic power station needs to be more than 30 years. During this process, batteries need to be frequently replaced, which is very costly. Furthermore, in the current operation of solar thermal power stations, the harsh climate conditions in the northwest region, such as sandstorms, lightning, and strong winds, can easily cause mirror dusting, damage, and control device failure, leading to reduced power generation efficiency. Summary of the Invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid blurring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0006] Therefore, the purpose of the present invention is to provide a new type of energy storage power station to replace the traditional photovoltaic and solar thermal power generation methods, avoiding the problems of high maintenance costs and low power generation efficiency during the operation of the power station.

[0007] To solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0008] A new energy storage power station, comprising:

[0009] Photovoltaic power generation mechanism, which converts solar energy into electrical energy when in operation;

[0010] A solar thermal energy storage mechanism, comprising a molten salt heating assembly connected to the photovoltaic power generation mechanism, a high-temperature molten salt tank connected to the output end of the molten salt heating assembly, a low-temperature molten salt tank connected to the output end of the high-temperature molten salt tank, and a molten salt reflux assembly that re-introduces the low-temperature molten salt in the low-temperature molten salt tank into the molten salt heating assembly during operation;

[0011] The steam power generation mechanism is located on one side of the solar thermal energy storage mechanism, wherein when the high-temperature molten salt in the high-temperature molten salt tank is discharged into the low-temperature molten salt tank, the steam power generation mechanism is automatically driven to start working to generate electricity.

[0012] As a preferred solution of the new energy storage power station described in the present invention, the photovoltaic power generation mechanism includes a support frame, a photovoltaic panel assembly located in the support frame, and an angle adjustment assembly for adjusting the tilt angle of the photovoltaic panel assembly.

[0013] As a preferred solution of the novel energy storage power station described in the present invention, one side of the support frame has a bearing plate;

[0014] The angle adjustment assembly includes a protective box located on the supporting plate, a servo motor located in the protective box and electrically connected to the photosensor, a turbine connected to the output end of the servo motor and located in the protective box, and a worm engaged with the turbine and having one end connected to the side wall of the photovoltaic panel assembly.

[0015] As a preferred solution of the new energy storage power station described in the present invention, the molten salt heating assembly includes a heating tank with a resistance wire inside, and the resistance wire is connected to the output end of the inverter connected to the photovoltaic panel assembly.

[0016] As a preferred solution of a new type of energy storage power station described in the present invention, the molten salt reflux assembly includes a first reflux pipe with one end connected to the top of the heating tank and the other end connected to the bottom of the low-temperature molten salt tank, and a molten salt circulation pump installed on the first reflux pipe.

[0017] As a preferred solution of a new type of energy storage power station described in the present invention, the steam power generation mechanism includes a steam generating assembly connected to the high-temperature molten salt tank at one end and the low-temperature molten salt tank at the other end, a turbine body connected to the output end of the steam generating assembly, a generator body connected to the output end of the turbine body, and a water return assembly connected to the steam generating assembly at one end and the turbine body at the other end.

[0018] As a preferred solution of a new type of energy storage power station described in the present invention, the steam generating assembly includes an annular water tank whose top is connected to the bottom of the high-temperature molten salt tank and whose bottom is connected to the top of the low-temperature molten salt tank, a spiral draft pipe whose one end is connected to the top connection port of the annular water tank and the other end is connected to the bottom connection port of the annular water tank, and a steam draft pipe whose one end is connected to the top of the annular water tank and the other end is connected to the input end of the turbine body.

[0019] As a preferred solution of the new energy storage power station described in the present invention, the water reflux component includes a condenser body whose input end is connected to the steam output end of the turbine body, a water pump whose input end is connected to the output end of the condenser body, and a second reflux pipe whose one end is connected to the output end of the water pump and the other end is connected to the top of the annular water tank.

[0020] As a preferred solution of the new energy storage power station described in the present invention, the output end of the steam turbine body is connected to a gearbox, and the output end of the gearbox is respectively connected to the generator body and the molten salt circulation pump drive shaft.

[0021] As a preferred solution of a new type of energy storage power station described in the present invention, a molten salt preheating assembly is provided on the first return pipe, and the molten salt preheating assembly includes a preheating pipe located at one end of the first return pipe adjacent to the molten salt heating tank, and a heat conduction assembly connected to the high-temperature area of ​​the turbine body at one end and connected to the preheating pipe at the other end, and the preheating pipe has spiral blades.

[0022] Compared with the existing technology, the beneficial effect of the present invention is that this new energy storage power station generates electricity through photovoltaic power generation, and then uses the electricity generated by photovoltaic power generation to heat and store molten salt. When electricity is needed, the high-temperature molten salt is discharged to drive the steam power generation mechanism to generate electricity, thereby completing the process of photovoltaic power generation, electric thermal energy storage and power generation again. The power generation is carried out by photovoltaic power generation plus molten salt energy storage, replacing the traditional photovoltaic and solar thermal power generation methods, avoiding the problems of high maintenance costs and low power generation efficiency during the operation of the power station. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be derived from these drawings without inventive effort. Among them:

[0024] Figure 1 This is a structural diagram of a new type of energy storage power station of the present invention;

[0025] Figure 2 This is a structural breakdown diagram of a new type of energy storage power station of the present invention;

[0026] Figure 3 This is a structural breakdown diagram of a photovoltaic power generation mechanism of a new energy storage power station of the present invention;

[0027] Figure 4 This is a schematic diagram of the connection structure between the photovoltaic energy storage mechanism and the steam power generation mechanism of a new energy storage power station of the present invention;

[0028] Figure 5 This is a schematic structural diagram of a steam generating assembly of a novel energy storage power station according to the present invention;

[0029] Figure 6 This is a schematic structural diagram of a molten salt preheating component of a new energy storage power station according to the present invention.

[0030] In the figure: 100, photovoltaic power generation mechanism; 110, support frame; 110a, load-bearing plate; 120, photovoltaic panel assembly; 130, angle adjustment assembly; 130a, protective box; 130b, servo motor; 130c, turbine; 130d, worm; 200, solar thermal energy storage mechanism; 210, molten salt heating assembly; 210a, heating tank; 220, high-temperature molten salt tank; 230, low-temperature molten salt tank; 240, molten salt reflux assembly; 240a, first reflux pipe; 240a-1 , molten salt preheating assembly; 240a-11, preheating pipe; 240a-12, heat conduction assembly; 240b, molten salt circulation pump; 300, steam power generation mechanism; 310, steam generating assembly; 310a, annular water tank; 310b, spiral guide pipe; 310c, steam guide pipe; 320, turbine body; 320a, gear box; 330, generator body; 340, water return assembly; 340a, condenser body; 340b, water pump; 340c, second return pipe. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0033] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0034] The present invention provides a new type of energy storage power station, which replaces traditional photovoltaic and solar thermal power generation methods, avoiding the problems of high maintenance costs and low power generation efficiency during power station operation.

[0035] Figures 1-6 The diagram shows the structure of a new type of energy storage power station of the present invention. Figures 1-6 Give a detailed introduction to this new type of energy storage power station.

[0036] Example 1

[0037] refer to Figure 1-Figure 2 The present invention discloses a new type of energy storage power station, the main part of which includes a photovoltaic power generation mechanism 100, a solar thermal energy storage mechanism 200 and a steam power generation mechanism 300.

[0038] refer to Figure 1-Figure 2 The photovoltaic power generation mechanism 100 is used to convert solar energy into electric energy. When the photovoltaic power generation mechanism 100 is working, it converts solar energy into electrical energy, which is used to avoid using heliostats for solar thermal power generation, thereby avoiding the low power generation efficiency caused by the surface of the heliostat being easily contaminated and damaged;

[0039] refer to Figure 1-Figure 2The solar thermal energy storage mechanism 200 is used to convert the electrical energy produced by the photovoltaic power generation mechanism 100 into thermal energy and then store the energy. The solar thermal energy storage mechanism 200 includes a molten salt heating component 210 connected to the photovoltaic power generation mechanism 100, a high-temperature molten salt tank 220 connected to the output end of the molten salt heating component 210, a low-temperature molten salt tank 230 connected to the output end of the high-temperature molten salt tank 220, and a molten salt reflux component 240 that re-introduces the low-temperature molten salt in the low-temperature molten salt tank 230 into the molten salt heating component 210 during operation. The molten salt heating component 210 is used to use the electrical energy generated by the photovoltaic power generation mechanism 100 to electrically heat the low-temperature molten salt. Heat, the high-temperature molten salt tank 220 is used to store the heated high-temperature molten salt. The inner wall of the high-temperature molten salt tank 220 is provided with a heat preservation mechanism, so as to better insulate the high-temperature molten salt and prevent heat loss. A control valve is provided at the connection between the bottom of the high-temperature molten salt tank 220 and the steam power generation mechanism 300. When power generation is required, the outlet at the bottom of the high-temperature molten salt tank 220 is opened through the control valve. The low-temperature molten salt tank 230 is used to temporarily store the low-temperature molten salt. The molten salt reflux component 240 is used to guide the low-temperature molten salt in the low-temperature molten salt tank 230 back to the molten salt heating component 210, so as to facilitate energy storage after secondary heating;

[0040] refer to Figure 1-Figure 2 The steam power generation mechanism 300 is used to generate steam by using high-temperature molten salt to generate electricity. The steam power generation mechanism 300 is located on one side of the solar thermal energy storage mechanism 200. When the high-temperature molten salt in the high-temperature molten salt tank 220 is discharged into the low-temperature molten salt tank 230, the steam power generation mechanism 300 is automatically driven to start working to generate electricity. Therefore, when power generation is needed, the high-temperature molten salt inside the high-temperature molten salt tank 220 flows into the low-temperature molten salt tank 230. During the process, steam power generation is performed after heat exchange through the steam power generation mechanism 300, so that the power station can be used for normal power supply. The low-temperature molten salt after heat exchange flows into the low-temperature molten salt tank 230.

[0041] In this embodiment, the specific usage process is as follows: first, photovoltaic power generation is performed through the photovoltaic power generation mechanism 100, and the electric energy generated by the photovoltaic power generation mechanism 100 is used to power the molten salt heating component 210, and the molten salt heating component 210 electrically heats the internal molten salt, and the heated molten salt enters the high-temperature molten salt tank 220. When the power station needs electricity, the high-temperature molten salt in the high-temperature molten salt tank 220 is discharged, and the low-temperature molten salt generated after heat exchange with the steam power generation mechanism 300 flows into the low-temperature molten salt tank 230 for temporary storage, and then the molten salt reflux component 240 works to guide the low-temperature molten salt in the low-temperature molten salt tank 230 back to the molten salt heating component 210 for reheating and energy storage, and the steam power generation mechanism 300 generates electricity after heat exchange, so as to The power station uses it, and then completes the coordination of photovoltaic power generation and molten salt energy storage for secondary power generation, which improves the power generation efficiency and reduces the operating cost of the power station. The reflective concentrating system (heliostat part) in the solar thermal power station accounts for 50% of the total cost of the entire tower molten salt solar thermal power station, the molten salt heating system (concrete tower with absorber installed) accounts for about 25% of the total cost of the entire tower molten salt solar thermal power station, and the molten salt energy storage system + steam power generation system accounts for about 25% of the total cost of the entire tower molten salt solar thermal power station. The photovoltaic power station with lower construction and operation and maintenance costs replaces the higher-cost reflective concentrating system (heliostat part) and molten salt heating system (concrete tower with absorber installed), so that the total cost of this new energy storage power station is greatly reduced compared with the tower molten salt solar thermal power station.

[0042] Example 2

[0043] Based on Example 1, Figure 1-Figure 3 The photovoltaic power generation mechanism 100 includes a support frame 110, a photovoltaic panel assembly 120 located in the support frame 110, and an angle adjustment assembly 130 for adjusting the tilt angle of the photovoltaic panel assembly 120. The support frame 110 is used to facilitate the installation of the photovoltaic panel assembly 120 and the angle adjustment assembly 130.

[0044] In this embodiment, reference Figure 3 One side of the support frame 110 has a bearing plate 110a for facilitating the installation of the angle adjustment assembly 130;

[0045] refer to Figure 3The angle adjustment assembly 130 includes a protective box 130a located on the carrier plate 110a, a servo motor 130b located in the protective box 130a and electrically connected to the photosensor, a turbine 130c connected to the output end of the servo motor 130b and located in the protective box 130a, and a worm 130d engaged with the turbine 130c and connected at one end to the side wall of the photovoltaic panel assembly 120. The protective box 130a is used to install and protect the servo motor 130b, the turbine 130c and the worm 130d. The servo motor 130b is used for working. When the turbine 130c is rotated, the turbine 130c is driven to rotate, and the photosensor is used to control the rotation angle of the servo motor 130b according to the light intensity. The turbine 130c is used to drive the worm 130d to rotate when it rotates, and the worm 130d is used to drive the photovoltaic panel assembly 120 to rotate inside the support frame 110 when it rotates, thereby adjusting the inclination angle of the photovoltaic panel assembly 120 according to the light angle. At the same time, the self-locking characteristics of the turbine 130c and the worm 130d are conducive to resisting strong winds and reducing the fixed costs of the support frame 110 and the photovoltaic panel assembly 120.

[0046] In this embodiment, the specific workflow is as follows: PV panel assembly 120 converts solar energy into electrical energy. Simultaneously, a portion of the power generated by the inverter connected to PV panel assembly 120 is connected to the grid, while a portion is electrically connected to molten salt heating assembly 210. This allows for full utilization of the electrical energy when PV panel assembly 120 generates excess power. When a photosensor senses a change in light intensity, it controls servo motor 130b, driving turbine 130c and worm 130d to rotate, thereby adaptively adjusting the tilt angle of PV panel assembly 120. PV panel assembly 120 is constructed of tempered glass, which is much stronger than heliostats and is less susceptible to damage in extreme weather conditions such as strong winds, lightning, and hail. Dust accumulation on both PV panel assembly 120 and heliostats can affect power generation efficiency. However, heliostats require high reflectivity, which can have a greater impact. To ensure power generation efficiency, PV panel assembly 120 and heliostats must be regularly cleaned. Due to the strength of PV panels, cleaning is relatively easy and inexpensive.

[0047] Example 3

[0048] Based on Example 2, Figure 1-Figure 4The molten salt heating component 210 includes a heating tank 210a with a resistance wire inside. The heating tank 210a is used to store the molten salt to be heated. The resistance wire is connected to the output end of the inverter connected to the photovoltaic panel component 120. After the photovoltaic panel component 120 generates electricity through solar energy, part of the electricity is output to the resistance wire through the inverter to drive the resistance wire to heat the molten salt in the heating tank 210a. A temperature control valve is provided at the connection between the bottom of the heating tank 210a and the high-temperature molten salt tank 220. The valve is opened when the molten salt in the heating tank 210a is heated to a certain temperature, so that the high-temperature molten salt flows into the high-temperature molten salt tank 220.

[0049] In this embodiment, reference Figure 1-Figure 4 The molten salt reflux assembly 240 includes a first return pipe 240a, one end of which is connected to the top of the heating tank 210a and the other end of which is connected to the bottom of the low-temperature molten salt tank 230, and a molten salt circulation pump 240b installed on the first return pipe 240a. The first return pipe 240a is used to introduce the low-temperature molten salt in the low-temperature molten salt tank 230 into the heating tank 210a when the molten salt circulation pump 240b is working. The molten salt circulation pump 240b is used to draw the low-temperature molten salt in the low-temperature molten salt tank 230 into the first return pipe 240a when working.

[0050] In this embodiment, the specific working process is as follows: the electric energy produced by the photovoltaic power generation mechanism 100 drives the resistance wire in the heating tank 210a to work and heat the molten salt in the heating tank 210a. When the molten salt in the heating tank 210a is heated to a certain temperature, the high-temperature molten salt flows into the high-temperature molten salt tank 220 for storage, thereby converting the electric energy into thermal energy and storing the energy. When power generation is required, the control valve at the bottom of the high-temperature molten salt tank 220 is opened, and the high-temperature molten salt in the high-temperature molten salt tank 220 and the low-temperature molten salt generated after heat exchange with the steam power generation mechanism 300 flows into the low-temperature molten salt tank 230. The molten salt circulation pump 240b works to draw the low-temperature molten salt in the low-temperature molten salt tank 230 back to the heating tank 210a through the first return pipe 240a, so that it can be heated again and stored, thereby realizing the recycling of molten salt.

[0051] Example 4

[0052] Based on Example 3, Figures 1-6The steam power generation mechanism 300 includes a steam generating assembly 310 connected to the high-temperature molten salt tank 220 at one end and the low-temperature molten salt tank 230 at the other end, a turbine body 320 connected to the output end of the steam generating assembly 310, a generator body 330 connected to the output end of the turbine body 320, and a water return assembly 340 connected to the steam generating assembly 310 at one end and the turbine body 320 at the other end. The steam generating assembly 310 is used to generate water vapor after heat exchange with the high-temperature molten salt. The turbine body 320 is used to drive the rotor of the generator body 330 to rotate after the water vapor output by the steam generating assembly 310 enters the turbine body 320 to drive it to work. The generator body 330 is used to generate electricity after its own rotor is driven by the turbine body 320 to supply power to the power station.

[0053] In this embodiment, reference Figure 5 The steam generating assembly 310 includes an annular water tank 310a whose top is connected to the bottom of the high-temperature molten salt tank 220 and whose bottom is connected to the top of the low-temperature molten salt tank 230, a spiral guide pipe 310b whose one end is connected to the top connection port of the annular water tank 310a and the other end is connected to the bottom connection port of the annular water tank 310a, and a steam guide pipe 310c whose one end is connected to the top of the annular water tank 310a and the other end is connected to the input end of the turbine body 320. The annular water tank 310a is used to store liquid water, and the spiral guide pipe 310b is used to increase the contact area with the liquid water inside the annular water tank 310a when the high-temperature molten salt flows from the inside, thereby improving the efficiency of heat exchange. The steam guide pipe 310c is used to introduce the water vapor generated inside the annular water tank 310a into the turbine body 320.

[0054] In this embodiment, reference Figure 4 The water reflux component 340 includes a condenser body 340a whose input end is connected to the steam output end of the turbine body 320, a water pump 340b whose input end is connected to the output end of the condenser body 340a, and a second reflux pipe 340c connected to the output end of the water pump 340b at one end and the top of the annular water tank 310a at the other end. The condenser body 340a is used to condense the water vapor output after passing through the turbine body 320, so that the water vapor is condensed into liquid water. The water pump 340b is used to pump the liquid water condensed by the condenser body 340a into the second reflux pipe 340c. The second reflux pipe 340c is used to pump the condensed water back into the annular water tank 310a when the water pump 340b is working, thereby realizing water recycling.

[0055] In this embodiment, reference Figure 4The output end of the steam turbine body 320 is connected to a gear box 320a, and the output end of the gear box 320a is respectively connected to the generator body 330 and the drive shaft of the molten salt circulation pump 240b, so as to divide and utilize the mechanical energy output by the steam turbine body 320, thereby reducing energy loss and avoiding the need to reconnect the drive source when the molten salt circulation pump 240b is working, thereby reducing energy consumption.

[0056] In this embodiment, the specific working process is as follows: when the power station needs electricity, the high-temperature molten salt in the high-temperature molten salt tank 220 is discharged into the annular water tank 310a; in the spiral guide pipe 310b, the high-temperature molten salt is heat-exchanged with the water in the annular water tank 310a in the spiral guide pipe 310b, and the molten salt after heat exchange flows into the low-temperature molten salt tank 230 for temporary storage. At this time, the liquid water in the annular water tank 310a generates water vapor after heat exchange with the high-temperature molten salt, and the water vapor is input into the turbine body 320 through the steam guide pipe 310c. When the turbine body 320 is working, on the one hand, it drives the generator body 330 to work and generate electricity, and on the other hand, it drives the molten salt circulation pump 240b body to work, so as to fill the low-temperature molten salt tank 230 with water. The low-temperature molten salt in 30 is pumped back into the heating tank 210a for reheating and energy storage, and the electricity generated by the generator body 330 is used by the power station, so that this new energy storage power station has an ultra-long energy storage time, and can continue to generate electricity even under conditions of lack or disappearance of sunlight such as rainy weather and night. At the same time, it can balance electricity prices and achieve peak-valley arbitrage. Because of its ultra-long energy storage time, this new energy storage power station can generate electricity at any time according to local electricity demand, so that the electricity generated by the photovoltaic power station is no longer "junk electricity", thereby achieving a balanced electricity price, generating more electricity when the electricity price is high and generating less electricity when the electricity price is low. This model can also achieve peak-valley arbitrage of electricity prices, which can improve energy self-sufficiency and economy, especially in areas with large differences in peak-valley electricity prices.

[0057] Example 5

[0058] Based on Example 4, Figures 1-6In order to prevent a large amount of crystallization of the low-temperature molten salt when it re-enters the heating tank 210a, which increases the electric energy consumed when the resistance wire heats it again, a molten salt preheating component 240a-1 is provided on the first return pipe 240a, which is used to preheat the molten salt that has re-flowed into the heating tank 210a before it flows into the heating tank 210a. The molten salt preheating component 240a-1 includes a preheating pipe 240a-11 located at one end of the first return pipe 240a near the molten salt heating tank 210a, and a heat conducting component 240a-12 connected to the high-temperature area of ​​the turbine body 320 at one end and connected to the preheating pipe 240a-11 at the other end. The heat conducting component 240a-1 2 is used to introduce heat from the high-temperature zone of the steam turbine body 320 during operation into the preheating pipe 240a-11, thereby increasing the heat inside the preheating pipe 240a-11 and heating the molten salt flowing therethrough. The preheating pipe 240a-11 is provided with spiral blades, which are used to impact the spiral blades and rotate them when the molten salt circulation pump 240b is operating so that the low-temperature molten salt flows in the first return pipe 240a and the preheating pipe 240a-11. When the spiral blades rotate, the molten salt flowing therethrough is disturbed, thereby improving the preheating efficiency. At the same time, the rotating spiral blades scrape the inner wall of the preheating pipe 240a-11, thereby preventing scaling on the inner wall of the preheating pipe 240a-11.

[0059] In this embodiment, the specific working process is as follows: when the turbine body 320 is working, the heat in its high-temperature zone is transferred to the preheating tube 240a-11 through the heat-conducting component 240a-12, thereby preheating the low-temperature molten salt flowing through the inside of the preheating tube 240a-11. During this process, the spiral blades in the preheating tube 240a-11 rotate under the impact of the flowing molten salt, thereby disturbing the molten salt, making the heat exchange efficiency between the low-temperature molten salt and the preheating tube 240a-11 higher, and avoiding the scaling of the inner wall of the preheating tube 240a-11 affecting the fluidity of the molten salt.

[0060] Although the present invention has been described above with reference to embodiments, various modifications may be made thereto and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as there are no structural conflicts, the various features of the embodiments disclosed herein may be combined with each other in any manner, and the omission of an exhaustive description of such combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A new type of energy storage power station, characterized in that: include: A photovoltaic power generation mechanism (100) converts solar energy into electrical energy when in operation; A solar thermal energy storage mechanism (200) comprises a molten salt heating assembly (210) connected to the photovoltaic power generation mechanism (100), a high-temperature molten salt tank (220) connected to an output end of the molten salt heating assembly (210), a low-temperature molten salt tank (230) connected to an output end of the high-temperature molten salt tank (220), and a molten salt reflux assembly (240) for re-introducing the low-temperature molten salt in the low-temperature molten salt tank (230) into the molten salt heating assembly (210) during operation; A steam power generation mechanism (300) is located on one side of the solar thermal energy storage mechanism (200), wherein when the high-temperature molten salt in the high-temperature molten salt tank (220) is discharged into the low-temperature molten salt tank (230), the steam power generation mechanism (300) is automatically driven to start working and generate electricity.

2. A new energy storage power station according to claim 1, characterized in that: The photovoltaic power generation mechanism (100) comprises a support frame (110), a photovoltaic panel assembly (120) located in the support frame (110), and an angle adjustment assembly (130) for adjusting the tilt angle of the photovoltaic panel assembly (120).

3. A new energy storage power station according to claim 2, characterized in that: One side of the support frame (110) is provided with a bearing plate (110a); The angle adjustment assembly (130) includes a protective box (130a) located on the supporting plate (110a), a servo motor (130b) located in the protective box (130a) and electrically connected to the photosensor, a turbine (130c) connected to the output end of the servo motor (130b) and located in the protective box (130a), and a worm (130d) engaged with the turbine (130c) and having one end connected to the side wall of the photovoltaic panel assembly (120).

4. A new energy storage power station according to claim 2, characterized in that: The molten salt heating component (210) comprises a heating tank (210a) having a resistance wire inside, and the resistance wire is connected to the output end of the inverter connected to the photovoltaic panel component (120).

5. A new energy storage power station according to claim 4, characterized in that: The molten salt reflux assembly (240) includes a first reflux pipe (240a) having one end connected to the top of the heating tank (210a) and the other end connected to the bottom of the low-temperature molten salt tank (230), and a molten salt circulation pump (240b) installed on the first reflux pipe (240a).

6. A new energy storage power station according to claim 5, characterized in that: The steam power generation mechanism (300) comprises a steam generating assembly (310) connected to the high-temperature molten salt tank (220) at one end and to the low-temperature molten salt tank (230) at the other end, a steam turbine body (320) connected to the output end of the steam generating assembly (310), a generator body (330) connected to the output end of the steam turbine body (320), and a water return assembly (340) connected to the steam generating assembly (310) at one end and to the steam turbine body (320) at the other end.

7. A new energy storage power station according to claim 6, characterized in that: The steam generating assembly (310) comprises an annular water tank (310a) whose top is connected to the bottom of the high-temperature molten salt tank (220) and whose bottom is connected to the top of the low-temperature molten salt tank (230), a spiral flow guide pipe (310b) whose one end is connected to the top connection port of the annular water tank (310a) and whose other end is connected to the bottom connection port of the annular water tank (310a), and a steam flow guide pipe (310c) whose one end is connected to the top of the annular water tank (310a) and whose other end is connected to the input end of the turbine body (320).

8. A new energy storage power station according to claim 7, characterized in that: The water return assembly (340) comprises a condenser body (340a) whose input end is connected to the steam output end of the turbine body (320), a water pump (340b) whose input end is connected to the output end of the condenser body (340a), and a second return pipe (340c) whose one end is connected to the output end of the water pump (340b) and the other end is connected to the top of the annular water tank (310a).

9. A new energy storage power station according to claim 6, characterized in that: The output end of the steam turbine body (320) is connected to a gear box (320a), and the output end of the gear box (320a) is respectively connected to the generator body (330) and the driving shaft of the molten salt circulation pump (240b).

10. A new energy storage power station according to claim 6, characterized in that: A molten salt preheating component (240a-1) is provided on the first return pipe (240a), and the molten salt preheating component (240a-1) includes a preheating pipe (240a-11) located at one end of the first return pipe (240a) adjacent to the molten salt heating tank (210a) and a heat conduction component (240a-12) connected to the high-temperature zone of the turbine body (320) at one end and connected to the preheating pipe (240a-11) at the other end, and spiral blades are provided in the preheating pipe (240a-11).

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