Heat preservation and heating molten salt tank

Abstract

The utility model discloses a heat preservation heating molten salt tank which comprises a tank body, a tank cover, a driving part, a rotating shaft and a plurality of stirring assemblies, the tank cover is arranged on an opening in the top end of the tank body, the driving part is installed on the tank cover, an output shaft of the driving part is connected with the rotating shaft, and the rotating shaft penetrates through the tank cover and extends into the tank body; the plurality of stirring assemblies are mounted on the rotating shaft, and each stirring assembly comprises a first stirring rod and a second stirring rod; one end of the first stirring rod is connected with the rotating shaft, and the other end is connected with the second stirring rod. Therefore, during fused salt energy storage, solid particle deposition and caking in the fused salt are reduced, and the heat conduction efficiency of the fused salt is improved, so that the fluidity of the fused salt is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of molten salt tanks, in particular to a heat-insulating and heating molten salt tank. Background Technique

[0002] In the rapidly developing energy storage and utilization industry, molten salt energy storage technology, as an efficient, environmentally friendly and renewable energy storage method, is gradually becoming a research and application hotspot. Molten salt, as a medium with high thermal stability, high specific heat capacity and good heat transfer performance, shows great potential in the fields of solar thermal power generation, industrial waste heat recovery, etc. However, with the increasing requirements for energy storage efficiency, stability and economy in these fields, the challenges faced by existing molten salt energy storage technologies are becoming increasingly severe.

[0003] The molten salt energy storage systems in the prior art generally adopt a static storage method, that is, the molten salt is directly injected into the storage tank and heated by an external heat source (such as a solar collector, an electric heater, etc.). Although this static storage method has a simple structure, it exposes many problems in actual operation. First of all, when the molten salt is in a static state, the heat transfer inside it mainly depends on heat conduction, and this heat transfer method has relatively low efficiency, resulting in a long heating process and low energy utilization rate. Secondly, long-term static storage is likely to cause the deposition and caking of solid particles in the molten salt, which will not only reduce the heat transfer performance of the molten salt, but also may block pipelines and heat exchange equipment, affecting the normal operation of the system. In addition, the deposition and caking will also reduce the fluidity of the molten salt, increasing the difficulty and cost of subsequent treatment and maintenance. Content of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems in the related technologies to a certain extent.

[0005] For this reason, the purpose of the utility model is to provide a heat-insulating and heating molten salt tank, which reduces the deposition and caking of solid particles in the molten salt and improves the heat conduction efficiency of the molten salt when performing molten salt energy storage, thereby ensuring the fluidity of the molten salt.

[0006] To achieve the above object, the utility model provides a heat-insulating and heating molten salt tank, which includes a tank body, a tank cover, a driving component, a rotating shaft and a plurality of stirring components. Among them, the tank cover is arranged on the top opening of the tank body, the driving component is installed on the tank cover, the output shaft of the driving component is connected to the rotating shaft, and the rotating shaft penetrates through the tank cover and extends into the tank body; a plurality of the stirring components are installed on the rotating shaft, and the stirring component includes a first stirring rod and a second stirring rod; one end of the first stirring rod is connected to the rotating shaft, and the other end is connected to the second stirring rod.

[0007] The heat-insulating and heating molten salt tank of the present utility model reduces the deposition and caking of solid particles in the molten salt and improves the heat conduction efficiency of the molten salt during molten salt energy storage, thereby ensuring the fluidity of the molten salt.

[0008] In addition, the heat-insulating and heating molten salt tank proposed according to the above application may also have the following additional technical features:

[0009] Specifically, the first stirring rod is perpendicular to the second stirring rod.

[0010] Specifically, the first stirring rod is hollow inside, and a plurality of first drainage openings are provided on the side wall of the first stirring rod; the second stirring rod is hollow inside, the first stirring rod and the second stirring rod are communicated with each other, and second drainage openings are provided at both the top end and the bottom end of the second stirring rod.

[0011] Specifically, a plurality of flow guiding members are installed on the first stirring rod, the flow guiding members correspond to the first drainage openings, the flow guiding members are arranged on the corresponding first drainage openings, and the flow guiding members are in a flared structure.

[0012] Specifically, the first drainage openings and the flow guiding members are provided on both side walls of the first stirring rod; a partition is installed inside the first stirring rod, the side wall of the partition fits with the inner wall of the first stirring rod, and the partition separates the first drainage openings on both sides of the first stirring rod.

[0013] The additional aspects and advantages of the present utility model will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present utility model. Description of the Drawings

[0014] The above-mentioned and / or additional aspects and advantages of the present utility model will become obvious and easy to understand from the following description of the embodiments in conjunction with the drawings, wherein:

[0015] Figure 1 is a schematic structural diagram of a heat-insulating and heating molten salt tank according to an embodiment of the present utility model;

[0016] Figure 2 is a schematic structural diagram of a stirring assembly of a heat-insulating and heating molten salt tank according to an embodiment of the present utility model;

[0017] Figure 3 is a schematic diagram of the position of a partition of a heat-insulating and heating molten salt tank according to an embodiment of the present utility model.

[0018] As shown in the figure: 10, tank body; 11, first anti-corrosion layer; 12, heating layer; 121, heating component; 13, first heat-insulating layer; 14, first reflective layer; 15, feed pipe; 16, discharge pipe; 20, tank cover; 21, second anti-corrosion layer; 22, second heat-insulating layer; 23, second reflective layer; 30, driving component; 40, rotating shaft; 50, stirring assembly; 51, first stirring rod; 511, first drainage port; 512, partition board; 52, second stirring rod; 521, second drainage port; 53, flow guiding part. Detailed implementation manners

[0019] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention. On the contrary, the embodiments of the present invention include all changes, modifications and equivalents that fall within the spirit and connotation of the appended claims.

[0020] The heat-insulating and heating molten salt tank according to the embodiments of the present invention will be described below with reference to the drawings.

[0021] As Figure 1 、 Figure 2 and Figure 3 shown, the heat-insulating and heating molten salt tank according to the embodiments of the present invention may include a tank body 10, a tank cover 20, a driving component 30, a rotating shaft 40 and a plurality of stirring assemblies 50.

[0022] Among them, a feed pipe 15 for feeding and a discharge pipe 16 for discharging are provided on the tank body 10.

[0023] The tank cover 20 is arranged on the top opening of the tank body 10. The driving component 30 is installed on the tank cover 20. The output shaft of the driving component 30 is connected to the rotating shaft 40, and the rotating shaft 40 penetrates through the tank cover 20 and extends into the tank body 10.

[0024] Specifically, the top end of the rotating shaft 40 is fixedly connected to the output shaft of the driving component 30, and the rotating shaft 40 can be vertically arranged. It should be noted that the length of the rotating shaft 40 is selected according to actual needs and will not be elaborated here.

[0025] It should be noted that the driving component 30 can be a high-temperature resistant motor.

[0026] It should be noted that the tank cover 20 is hermetically arranged at the top opening of the tank body 10, and a contact dynamic seal design is adopted between the rotating shaft 40 and the tank cover 20. For example, a steel plate contact seal can be adopted between the rotating shaft 40 and the tank cover 20 to ensure the sealing effect.

[0027] A plurality of stirring components 50 are installed on the rotating shaft 40, and the stirring component 50 includes a first stirring rod 51 and a second stirring rod 52.

[0028] One end of the first stirring rod 51 is connected to the rotating shaft 40, and the other end is connected to the second stirring rod 52. The first stirring rod 51 and the second stirring rod 52 are perpendicularly arranged, so that the two are combined into a T-shaped structure.

[0029] Specifically, the first stirring rod 51 can be horizontally arranged. One end of the first stirring rod 51 is detachably connected to the rotating shaft 40, and the other end is fixedly connected to the second stirring rod 52; the second stirring rod 52 can be vertically arranged.

[0030] It should be noted that the plurality of stirring components 50 can be 6, 7, 8, 9, 10 stirring components 50, etc. The specific quantity is selected according to actual needs and will not be elaborated here.

[0031] It should be noted that the plurality of stirring components 50 can be evenly distributed on the rotating shaft 40.

[0032] Specifically, during the actual operation, relevant personnel add molten salt into the tank body 10 through the feeding pipe 15 to an appropriate height; start the heating component 121 to preheat the molten salt in the tank body 10 to ensure that the molten salt reaches the required temperature; start the driving component 30 to drive the rotating shaft 40 to rotate, and the plurality of stirring components 50 on the rotating shaft 40 rotate accordingly. The combined stirring effect of the first stirring rod 51 and the second stirring rod 52 makes the molten salt flow in the tank body 10, improving the heat conduction efficiency.

[0033] Through the stirring effect of the stirring component 50, the molten salt flows in the tank body 10, improving the heat conduction efficiency, reducing the heating time and energy consumption; the continuous stirring effect effectively prevents the deposition and caking of the molten salt, ensuring the quality and fluidity of the molten salt.

[0034] It should be noted that a liquid level gauge and a plurality of temperature detection devices can also be arranged inside the tank body 10.

[0035] In an embodiment of the present utility model, as Figure 1 shown, the tank body 10 is divided into a first anti-corrosion layer 11, a heating layer 12, a first heat-insulating layer 13 and a first reflective layer 14 from the inside to the outside.

[0036] Among them, a heating component 121 is embedded inside the heating layer 12. It should be noted that the heating component 121 can be a solar collector or an electric heater. The specific type of the heating component 121 is selected according to actual needs and will not be elaborated here.

[0037] An adiabatic structure is provided inside the first adiabatic layer 13. It should be noted that the adiabatic structure can be an inert gas layer or a multi-layer structure, and the specific structure is selected according to actual needs, which will not be elaborated here.

[0038] The first reflective layer 14 is disposed outside the first adiabatic layer 13 along the radial direction of the tank body 10, and the outer surface of the first reflective layer 14 is a reflective surface. It should be noted that the first reflective layer 14 can be a metal reflective film.

[0039] The tank cover 20 is divided into a second anti-corrosion layer 21, a second adiabatic layer 22, and a second reflective layer 23 from bottom to top.

[0040] Among them, the second adiabatic layer 22 adopts the same adiabatic structure as that inside the first adiabatic layer 13.

[0041] The second reflective layer 23 is disposed on the upper surface of the second adiabatic layer 22, and the outer surface of the second reflective layer 23 is a reflective surface. It should be noted that the second reflective layer 23 is made of the same material as the first reflective layer 14.

[0042] It should be noted that the rotating shaft 40 is hermetically arranged with the second adiabatic layer 22, and the rotating shaft 40 will not have too much impact on the adiabatic effect of the second adiabatic layer 22.

[0043] Furthermore, in an embodiment of the present utility model, as Figure 2 shown, the first stirring rod 51 is hollow inside, and a plurality of first drainage ports 511 communicating with the inside of the first stirring rod 51 are provided on the side wall of the first stirring rod 51.

[0044] It should be noted that the plurality of first drainage ports 511 can be 3, 4, 5, 6, 7 first drainage ports 511, etc., and the specific quantity is selected according to actual needs, which will not be elaborated here.

[0045] The second stirring rod 52 is hollow inside, the first stirring rod 51 and the second stirring rod 52 are connected and communicate with each other, and second drainage ports 521 communicating with the inside of the second stirring rod 52 are provided at both the top and bottom of the second stirring rod 52.

[0046] It should be noted that the end face of the first stirring rod 51 where the first drainage port 511 is located can be a vertical plane.

[0047] It can be understood that when the driving component 30 starts and drives the rotating shaft 40 and the stirring assembly 50 to rotate, the combined stirring effect of the first stirring rod 51 and the second stirring rod 52 causes the molten salt to be mechanically stirred in the tank body 10, initially realizing the mixing of the molten salt; during the stirring process of the molten salt, part of the molten salt will enter the inside of the first stirring rod 51 through the first drainage port 511 on the side wall of the first stirring rod 51, and flow into the inside of the second stirring rod 52 along with the rotation of the first stirring rod 51, and then flow out from the second drainage port 521, so that the molten salt near the position of the first drainage port 511 flows to the position of the second drainage port 521, promoting the formation of a more complex flow pattern of the molten salt in the horizontal and vertical directions, further promoting the mixing and temperature uniformity of the molten salt. The flow exchange of the molten salt helps to improve the heat conduction efficiency, reduce the heating time and energy consumption, and this continuous stirring and multi-directional flow of the molten salt further prevent the deposition and caking of the molten salt, ensuring the quality and fluidity of the molten salt.

[0048] In an embodiment of the present invention, as Figure 2 and Figure 3 shown, a plurality of flow guiding members 53 are installed on the first stirring rod 51. The flow guiding members 53 correspond to the first drainage ports 511. The flow guiding members 53 are arranged on the corresponding first drainage ports 511, and the flow guiding members 53 are in a horn-shaped flared structure.

[0049] Specifically, the flow guiding member 53 is in a horn shape, that is, its diameter gradually increases from one end installed on the first stirring rod 51 to the other end, forming a flared shape, which helps the smooth inflow of the molten salt and reduces the flow resistance.

[0050] It should be noted that the number of the flow guiding members 53 and the first drainage ports 511 is the same and they correspond one by one.

[0051] In an embodiment of the present invention, as Figure 2 and Figure 3 shown, the first drainage ports 511 and the flow guiding members 53 are arranged on both side walls of the first stirring rod 51.

[0052] A partition 512 is installed inside the first stirring rod 51. The side wall of the partition 512 is attached to the inner wall of the first stirring rod 51, and the partition 512 separates the first drainage ports 511 on both sides of the first stirring rod 51.

[0053] It can be understood that the first drainage openings 511 on both sides of the first stirring rod 51 are separated. When the rotating shaft 40 drives the first stirring rod 51 to rotate, after the molten salt flows into the first stirring rod 51 from the first drainage opening 511 on one side, it will not immediately flow out from the first drainage opening 511 on the other side under the blockage of the partition plate 512, but will flow into the second stirring rod 52 and flow out from the second drainage opening 521. By providing the first drainage openings 511 on both sides of the first stirring rod 51, no matter whether the driving component 30 drives the rotating shaft 40 to rotate clockwise or counterclockwise, the stirring assembly 50 can play a stirring role, and the use is relatively flexible.

[0054] In summary, for the heat preservation and heating molten salt tank of the embodiment of the present utility model, during molten salt energy storage, the deposition and caking of solid particles in the molten salt are reduced, and the heat conduction efficiency of the molten salt is improved, thereby ensuring the fluidity of the molten salt.

[0055] In the description of this specification, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0056] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0057] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A heat preservation and heating molten salt tank, characterized in that: It includes a tank body, a tank cover, a driving component, a rotating shaft and a plurality of stirring components, wherein: The tank cover is arranged on the top opening of the tank body, the driving component is mounted on the tank cover, the output shaft of the driving component is connected to the rotating shaft, and the rotating shaft passes through the tank cover and extends into the tank body; A plurality of stirring assemblies are mounted on the rotating shaft, and the stirring assemblies include a first stirring rod and a second stirring rod; One end of the first stirring rod is connected to the rotating shaft, and the other end is connected to the second stirring rod.

2. The heat preservation and heating molten salt tank according to claim 1 is characterized in that: The first stirring rod and the second stirring rod are arranged vertically.

3. The heat preservation and heating molten salt tank according to claim 2 is characterized in that: The first stirring rod is hollow inside, and a plurality of first drainage ports are formed on the side wall of the first stirring rod; The second stirring rod is hollow inside, the first stirring rod is connected to the second stirring rod, and the top end and the bottom end of the second stirring rod are both provided with second drainage ports.

4. The heat preservation and heating molten salt tank according to claim 3 is characterized in that: A plurality of flow guides are installed on the first stirring rod, the flow guides correspond to the first flow guide ports, the flow guides are arranged on the corresponding first flow guide ports, and the flow guides are trumpet-shaped expansion structures.

5. The heat preservation and heating molten salt tank according to claim 4 is characterized in that: The first flow guide port and the flow guide member are disposed on both side walls of the first stirring rod; A partition is installed inside the first stirring rod, a side wall of the partition is in contact with an inner wall of the first stirring rod, and the partition separates the first drainage ports on both sides of the first stirring rod.

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