Anti-crystallization and stratification stirring device for molten salt energy storage tank

Abstract

This utility model discloses a molten salt energy storage tank anti-crystallization layered stirring device in the field of energy storage equipment technology. It includes an energy storage tank body, with an inlet pipe fixedly connected to one side of the lower end of the tank body and an outlet pipe fixedly connected to one side of the upper end. Several placement discs are arranged inside the tank body. A first placement groove is fixedly formed on the outer upper end of each placement disc, and a second placement groove is fixedly formed on the inner upper end of each disc. A flow channel is fixedly formed at the lower end of each placement disc, and an overflow hole is fixedly formed at the upper end of the flow channel. This arrangement uses a layered placement method, and by introducing superheated steam, the superheated steam can fully contact each layer of molten salt, thereby rapidly heating the molten salt and storing energy, improving heating efficiency and accelerating energy storage efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage equipment technology, specifically relating to a stirring device for preventing crystallization and stratification in molten salt energy storage tanks. Background Technology

[0002] Molten salt energy storage is a long-term, large-capacity energy storage technology that uses media such as nitrates to store and release thermal energy. It features high energy density, long lifespan, safety, and environmental friendliness. This system uses a dual-tank thermal storage device to achieve energy circulation, which can meet the flexible dispatching needs of the power grid and has already achieved large-scale application in the field of concentrated solar power (CSP).

[0003] Currently, there are many energy storage tanks on the market, such as the molten salt energy storage tank proposed in announcement number CN208470624U, which includes an outer shell and an internal tube assembly. The internal tube assembly includes an upper oil tank, a lower oil tank, and multiple heat exchange tubes. The upper oil tank is located at the inner top of the outer shell, and the lower oil tank is located at the inner bottom of the outer shell. The upper oil tank, the lower oil tank, and the outer shell located between the upper and lower oil tanks form a molten salt filling area for filling molten salt. The upper oil tank and the lower oil tank are connected by multiple heat exchange tubes, and each heat exchange tube is used for the flow of heat transfer oil. The lower oil tank includes a completely separated oil inlet chamber and an oil outlet chamber. The side wall of the oil inlet chamber is connected to a heat transfer oil inlet pipe, and the side wall of the oil outlet chamber is connected to a heat transfer oil outlet pipe. The outer wall of the outer shell is connected to a molten salt addition pipe that communicates with the molten salt filling area.

[0004] The existing lava energy storage tanks mentioned above use heat-conducting oil pipes to heat molten salt for energy storage. However, the amount of molten salt in the tank is relatively large, and the amount of molten salt that the oil pipes can contact is small, which affects the heating efficiency and thus the energy storage efficiency, thus having certain limitations. Utility Model Content

[0005] The purpose of this invention is to provide a molten salt energy storage tank anti-crystallization stratification stirring device to solve the problem of low heating efficiency affecting energy storage efficiency of existing tubular molten salt energy storage devices mentioned in the background art. This device allows for stratified placement of molten salt, with two placement tanks in the same layer and a steam flow channel between them. By introducing steam, the steam circulates upwards in the flow channel, heating the placement tanks layer by layer and ensuring full contact with the molten salt for direct heating. This heat can be converted into thermal energy of the molten salt for storage. By designing for stratified heating, the contact area with the heating channel can be increased, improving heating efficiency. Compared with the low efficiency of traditional tubular heating, this device has significant advantages.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a molten salt energy storage tank anti-crystallization stratification stirring device, comprising an energy storage tank body, an air inlet pipe fixedly connected to one side of the lower end of the energy storage tank body, an air outlet pipe fixedly connected to one side of the upper end of the energy storage tank body, a placement disc provided inside the energy storage tank body, the number of placement discs being several, a first placement groove fixedly opened on the outer side of the upper end of the placement disc, a second placement groove fixedly opened on the inner side of the upper end of the placement disc, a flow channel fixedly opened at the lower end of the placement disc, and an overflow hole fixedly opened at the upper end of the flow channel.

[0007] Preferably, a drive device is fixedly connected to the upper end of the energy storage tank body, and the drive device is fixedly connected to a rotating shaft via a shaft.

[0008] Preferably, the bottom placement disc is fixedly connected to the inside of the energy storage tank body, and the upper placement disc is fixedly connected to the surface of the rotating shaft, with the rotating shaft rotatably sleeved at the center of the bottom placement disc.

[0009] Preferably, a stirring shaft is fixedly connected to the lower end of the placement disc, and stirring blades are fixedly connected to the surface of the stirring shaft.

[0010] Preferably, the driving device includes a motor housing, a drive motor, and a power supply assembly. The motor housing has heat dissipation vents fixedly opened on both sides. The drive motor is fixedly connected to one side of the interior of the motor housing, and the power supply assembly is fixedly connected to the other side of the interior of the motor housing. The drive motor is electrically connected to the power supply assembly through wires.

[0011] Preferably, the lower end of the energy storage tank body is fixedly connected to a support leg, and the number of the support legs is three.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. This utility model adopts a layered placement method. By introducing superheated steam, the superheated steam can fully contact the molten salt in each layer, thereby rapidly heating the molten salt and storing energy, improving heating efficiency and accelerating energy storage efficiency.

[0014] 2. This utility model can stir and disperse molten salt, which can avoid the crystallization of molten salt due to long-term use, resulting in low heating efficiency and thus affecting energy storage efficiency. It can fully disperse molten salt for rapid heating, further accelerating the energy storage efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2This is a schematic diagram of the internal structure of the energy storage tank body of this utility model;

[0017] Figure 3 This is a side view of the present invention.

[0018] Figure 4 This is a schematic diagram of the internal structure of the drive device of this utility model.

[0019] In the diagram: 1. Energy storage tank body; 2. Air inlet pipe; 3. Air outlet pipe; 5. Placement disc; 6. First placement slot; 7. Flow channel; 8. Overflow hole; 9. Second placement slot; 10. Drive device; 11. Rotating shaft; 12. Stirring shaft; 13. Stirring blade; 14. Support leg; 15. Motor box; 16. Heat dissipation port; 17. Drive motor; 18. Power supply assembly. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a technical solution: a molten salt energy storage tank anti-crystallization stratification stirring device, including an energy storage tank body 1, an air inlet pipe 2 fixedly connected to one side of the lower end of the energy storage tank body 1, an air outlet pipe 3 fixedly connected to one side of the upper end of the energy storage tank body 1, a number of placement discs 5 are arranged inside the energy storage tank body 1, a first placement groove 6 is fixedly opened on the outer side of the upper end of the placement disc 5, a second placement groove 9 is fixedly opened on the inner side of the upper end of the placement disc 5, a flow channel 7 is fixedly opened at the lower end of the placement disc 5, a 20 is fixedly connected to the lower end of the flow channel 7, the placement discs 5 are stacked, and an overflow hole 8 is fixedly opened at the upper end of the flow channel 7.

[0022] In this embodiment, superheated steam can be introduced into the interior of the energy storage tank body 1 through the air inlet pipe 2. The superheated steam quickly fills the bottom space of the energy storage tank body 1 and circulates upwards. During the upward circulation, it can fully contact the placement layer on the surface of the inner placement disc 5 and heat the molten salt, so that the molten salt can be heated quickly and stored. Excess superheated steam can be discharged through the air outlet pipe 3. The internal parts of the energy storage tank body 1 are coated with a heat insulation layer, which is a mature existing technology and will not be described in detail here. This design adopts a layered placement method. By introducing superheated steam, the superheated steam can fully contact the molten salt in each layer, thereby quickly heating the molten salt and storing energy, improving the heating efficiency and accelerating the energy storage efficiency.

[0023] Specifically, a drive device 10 is fixedly connected to the upper end of the energy storage tank body 1, and the drive device 10 is fixedly connected to a rotating shaft 11 via a shaft.

[0024] In this embodiment, the drive device 10 can drive the rotating shaft 11 to rotate when it is driven to rotate.

[0025] Specifically, the bottom placement disc 5 is fixedly connected to the inside of the energy storage tank body 1, and the upper placement disc 5 is fixedly connected to the surface of the rotating shaft 11. The rotating shaft 11 is rotatably sleeved at the center of the bottom placement disc 5.

[0026] In this embodiment, the bottom placement disc 5 is fixed inside the energy storage tank body 1, the upper placement disc 5 is fixed on the surface of the rotating shaft 11, and the uppermost placement disc 5 is also fixed inside the energy storage tank body 1. By installing them in sequence, the adjacent placement discs 5 can form a relative rotation state when the rotating shaft 11 rotates.

[0027] Specifically, a stirring shaft 12 is fixedly connected to the lower end of the placement disc 5, and stirring blades 13 are fixedly connected to the surface of the stirring shaft 12.

[0028] In this embodiment, the stirring shaft 12 can stir the molten salt in the placement tank when the adjacent placement disks 5 rotate relative to each other, which can effectively prevent the molten salt from crystallizing. This design can stir and disperse the molten salt, which can prevent the molten salt from crystallizing due to long-term use, resulting in low heating efficiency and affecting energy storage efficiency. It can also fully disperse the molten salt for rapid heating.

[0029] Specifically, the drive device 10 includes a motor housing 15, a drive motor 17, and a power supply assembly 18. Heat dissipation vents 16 are fixedly opened on both sides of the motor housing 15. The drive motor 17 is fixedly connected to one side of the interior of the motor housing 15, and the power supply assembly 18 is fixedly connected to the other side of the interior of the motor housing 15. The drive motor 17 is electrically connected to the power supply assembly 18 through wires.

[0030] In this embodiment, the power supply component 18 can provide power to the drive motor 17, enabling the drive motor 17 to rotate. Heat dissipation vents 16 are provided on both sides of the motor housing 15 to dissipate heat.

[0031] Specifically, the lower end of the energy storage tank body 1 is fixedly connected to a support leg 14, and there are three support legs 14.

[0032] In this embodiment, the energy storage tank body 1 is supported by the supporting legs 14. During use, superheated steam can be introduced into the interior of the energy storage tank body 1 through the air inlet pipe 2. The superheated steam quickly fills the bottom space of the energy storage tank body 1 and circulates upwards. During the upward circulation, it can fully contact the placement layer on the surface of one of the placement discs 5 and heat the molten salt, so that the molten salt can be heated quickly and stored. Excess superheated steam can be discharged through the air outlet pipe 3. During the heating process, the power switch of the drive motor 17 can be turned on to drive the rotating shaft 11 to rotate, thereby causing the adjacent placement discs 5 to rotate relative to each other. The stirring shaft 12 at the bottom of the placement disc 5 can stir and disperse the molten salt in the tank, preventing the molten salt from crystallizing and affecting the heating efficiency, and further improving the energy storage efficiency.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A molten salt energy storage tank anti-crystallization and stratification stirring device, comprising an energy storage tank body (1), characterized in that: An air inlet pipe (2) is fixedly connected to one side of the lower end of the energy storage tank body (1), and an air outlet pipe (3) is fixedly connected to one side of the upper end of the energy storage tank body (1). A placement disc (5) is provided inside the energy storage tank body (1). There are several placement discs (5). A first placement groove (6) is fixedly opened on the outer side of the upper end of the placement disc (5). A second placement groove (9) is fixedly opened on the inner side of the upper end of the placement disc (5). A flow channel (7) is fixedly opened at the lower end of the placement disc (5). An overflow hole (8) is fixedly opened at the upper end of the flow channel (7).

2. The molten salt energy storage tank anti-crystallization stratification stirring device according to claim 1, characterized in that: The upper end of the energy storage tank body (1) is fixedly connected to a drive device (10), and the drive device (10) is fixedly connected to a rotating shaft (11) via a shaft.

3. The molten salt energy storage tank anti-crystallization stratification stirring device according to claim 1, characterized in that: The bottom placement disc (5) is fixedly connected to the inside of the energy storage tank body (1), and the upper placement disc (5) is fixedly connected to the surface of the rotating shaft (11). The rotating shaft (11) is rotatably sleeved at the center of the bottom placement disc (5).

4. The molten salt energy storage tank anti-crystallization stratification stirring device according to claim 2, characterized in that: The lower end of the placement disc (5) is fixedly connected to a stirring shaft (12), and a stirring blade (13) is fixedly connected to the surface of the stirring shaft (12).

5. The molten salt energy storage tank anti-crystallization stratification stirring device according to claim 4, characterized in that: The drive device (10) includes a motor housing (15), a drive motor (17), and a power supply assembly (18). The motor housing (15) has heat dissipation vents (16) fixedly opened on both sides. The drive motor (17) is fixedly connected to one side of the interior of the motor housing (15), and the power supply assembly (18) is fixedly connected to the other side of the interior of the motor housing (15). The drive motor (17) is electrically connected to the power supply assembly (18) through wires.

6. The molten salt energy storage tank anti-crystallization stratification stirring device according to claim 1, characterized in that: The lower end of the energy storage tank body (1) is fixedly connected to a support leg (14), and there are three support legs (14).

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