Molten salt heat storage device
By designing a multi-layer temperature difference structure and heating pipes in the thermal storage device, the problems of low thermal storage density and high demand for insulation materials were solved, thus realizing a molten salt thermal storage device with high thermal storage density and good insulation effect.
Patent Information
- Application Number
- CN202423192247.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Existing thermal storage devices suffer from low thermal density and require high-quality insulation materials.
Design a molten salt thermal storage device. By setting up a multi-layer temperature difference structure in the thermal storage structure, the thermal conductivity is reduced by the influence of temperature difference on the thermal conductivity, thus improving the thermal insulation effect. The thermal insulation material requirement is also reduced by the design of heating pipes and temperature difference.
It achieves high heat storage density and good insulation effect, reduces the requirements for insulation materials, and improves the efficiency of heat energy utilization.
Smart Images
Figure CN223610665U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to heat storage equipment technical field, especially, relate to a molten salt heat storage device. BACKGROUND
[0002] The molten salt heat storage technology is a kind of technology using the temperature difference of molten salt in the process of temperature rise and drop to realize heat energy storage.Because molten salt is inorganic salt melt, it has the characteristics of high boiling point, low viscosity, low vapor pressure and high volume heat, so it is an excellent heat transfer and heat storage medium.
[0003] Due to the large difference between daytime and nighttime peak and valley of power supply in China, and now vigorously promote coal-to-electricity project, electric heating replaces coal-fired boiler.The government promulgated the night low valley electricity preferential policy, encourages to use cheap low valley electricity to heat heat storage material to store heat energy, achieves the purpose of peak clipping and valley filling.Specifically, electric heat storage device will use the wave trough electricity of night to heat heat storage medium, and the medium is stored heat and then gradually transfers heat to hot water through heat exchange pipe.However, the existing heat storage device mostly uses heat storage brick or water as heat storage medium, and there is the problem of low heat storage density and high requirement for thermal insulation material.
[0004] In view of the above-mentioned problem of low heat storage density and high requirement for thermal insulation material, the utility model designs a molten salt heat storage device. UTILITY MODEL CONTENT
[0005] The utility model aims at providing a molten salt heat storage device, which is filled with heat storage medium salt and its structure design, so that it is designed with multiple temperature difference structures, so that the heat conduction speed inside the heat storage inner cylinder and heat storage shell is lower than that of traditional heat storage device, and it has the advantages of high heat preservation effect, solves the problem of low heat storage density and high requirement for thermal insulation material.
[0006] To solve the above technical problems, the utility model is realized by the following technical schemes:
[0007] The utility model discloses a molten salt heat storage device, including heat storage shell and heat storage structure, the heat storage shell is built -in heat storage structure, the heat storage structure includes heat storage inner tube, heat storage outer tube, cylinder cover and heat exchange subassembly, the cylinder cover bottom surface is provided with two circles heat preservation gasket, two circles heat preservation gasket respectively with heat storage inner tube, the top of heat storage outer tube is sealed and is cooperated, the cylinder cover is assembled with heat exchange subassembly, the import and export of heat exchange subassembly all are fixedly installed with a connecting pipe, the heat storage inner tube and heat storage outer tube inside all fill with the salt for heat storage medium, the cylinder cover bottom surface is fixedly installed with heating pipe above heat storage inner tube and heat storage outer tube respectively, when being in the trough of night, will utilize trough electricity and heating pipe to heat the salt of heat storage medium and heat up, and heat in heat storage inner tube and heat storage outer tube inside is two different temperature molten salt state, the molten salt temperature in heat storage inner tube is slightly higher than the molten salt temperature in heat storage outer tube, make the temperature inside heat storage structure from inside to outside presents gradually decreasing temperature ladder, according to the important factor of temperature difference is the influence heat conduction speed, the greater the temperature difference, the faster the heat conduction speed, on the contrary, the smaller the temperature difference, the slower the heat conduction speed, that is to say, the heat storage inner tube and heat storage outer tube in heat storage structure are provided with a certain degree of temperature difference between heat storage outer tube and heat storage outer shell, so as to reach the heat conduction speed between heat storage inner tube and heat storage outer tube, heat storage outer tube and heat storage outer shell is lower than the heat conduction speed of traditional heat storage device, therefore, realize the heat energy of improving loss, when needing to reach the same heat preservation effect, the heat preservation material requirement of the molten salt heat storage device of the utility model is relatively lower, the function of heat exchange subassembly and connecting pipe is that the heat inside heat storage structure is exchanged when needed.
[0008] As a preferred technical scheme of the utility model, a plurality of support columns are fixedly installed between the heat storage inner tube and the heat storage outer tube; the support columns provide support and connection structure strength for the heat storage inner tube and the heat storage outer tube.
[0009] As a preferred technical scheme of the utility model, heat preservation foam is fixed to the outer wall of the heat storage shell, and heat preservation and heat insulation material is filled between the inner wall of the heat storage shell and the outer wall of the heat storage structure; the heat preservation foam functions to reduce the heat dissipation speed of the heat conducted on the heat storage shell as much as possible, so as to maintain a temperature higher than that of the outside world and maintain a temperature difference with the heat storage structure; and the heat preservation and heat insulation material functions to reduce the heat loss inside the heat storage structure as much as possible.
[0010] As a preferred technical scheme of the utility model, the top surface of the heat storage inner cylinder and the heat storage outer cylinder is provided with a heat insulation cavity; the heat insulation cavity inner wall is filled with heat insulation material resistant to high temperature; on the basis of maintaining a small temperature difference, the heat conduction efficiency is further reduced through the action of the heat insulation material; the heat insulation material not only needs to be resistant to high temperature, but also reduces the heat conduction speed between the heat storage inner cylinder and the heat storage outer cylinder; the cylinder cover is internally provided with a heat insulation cavity; the heat insulation cavity is filled with heat insulation material resistant to high temperature.
[0011] As a preferred technical scheme of the utility model, the two heat insulation gaskets are a heat insulation inner gasket and a heat insulation outer gasket; the two heating pipes are heating pipe A and heating pipe B; the heating power ratio of the heating pipe A and the heating pipe B ranges from 1.2 to 5; the heating pipe A has higher heating power, so that the heat storage inner cylinder is heated to a higher temperature.
[0012] As a preferred technical scheme of the utility model, the cylinder cover is fixedly provided with two safety valves; the two safety valves are fixedly communicated with communication pipes; the two communication pipes penetrate through the cylinder cover and are respectively communicated with the heat storage inner cylinder and the heat storage outer cylinder; the safety valves and the communication pipes can avoid the pressure in the heat storage inner cylinder and the heat storage outer cylinder exceeding a safety value.
[0013] The utility model has the following beneficial effects:
[0014] The utility model fills the heat storage structure with salt and its structure design, so that a plurality of temperature difference structures are designed inside, so that the heat conduction speed in the heat storage inner cylinder and the heat storage shell is lower than that of the traditional heat storage device, and the utility model has the advantages of good heat preservation effect, high heat storage density and the like.
[0015] Of course, implementing any product of the utility model does not necessarily need to achieve all the advantages mentioned above. DRAWINGS
[0016] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.
[0017] Figure 1 It is the internal structure profile of the molten salt heat storage device of the utility model;
[0018] Figure 2 It is the internal structure plan of the molten salt heat storage device of the utility model;
[0019] The components represented by the reference numerals in the drawings are listed as follows:
[0020] 1-heat storage shell, 2-heat storage structure, 3-salt, 4-heating pipe, 5-thermal insulation foam, 6-thermal insulation material, 7-insulation material, 8-safety valve, 201-heat storage inner cylinder, 202-heat storage outer cylinder, 203-cylinder cover, 204-heat exchange assembly, 205-thermal insulation washer, 206-connection pipe, 207-support column, 208-insulation cavity, 209-insulation cavity, 401-heating pipe A, 402-heating pipe B, 801-communication pipe, 2051-thermal insulation inner washer, 2052-thermal insulation outer washer. DETAILED DESCRIPTION
[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0022] Please refer to Figures 1-2The utility model discloses a molten salt heat storage device, including heat storage shell 1 and heat storage structure 2, heat storage shell 1 is built-in heat storage structure 2, and heat storage structure 2 includes heat storage inner tube 201, heat storage outer tube 202, cylinder cover 203 and heat exchange subassembly 204, the bottom of cylinder cover 203 is provided with two circles of heat preservation washer 205, two circles of heat preservation washer 205 are respectively with the top of heat storage inner tube 201, heat storage outer tube 202 are sealed and cooperate, and heat exchange subassembly 204 is assembled on cylinder cover 203, and one connecting pipe 206 is fixedly installed at the import and export of heat exchange subassembly 204, heat storage inner tube 201 and heat storage outer tube 202 are filled with the salt 3 for heat storage medium inside, and the bottom of cylinder cover 203 is fixedly installed with heating pipe 4 above heat storage inner tube 201 and heat storage outer tube 202 respectively, when being in the trough of night, the salt 3 of heat storage medium will be heated and heated by trough electricity and heating pipe 4, and the inside heating of heat storage inner tube 201 and heat storage outer tube 202 is two different temperature molten salt state, and the molten salt temperature in heat storage inner tube 201 is slightly higher than the molten salt temperature in heat storage outer tube 202, make the temperature inside heat storage structure 2 gradually decrease from inside to outside and present temperature ladder, according to the important factor of temperature difference is the influence heat conduction speed, and the greater the temperature difference, the faster the heat conduction speed, on the contrary, the smaller the temperature difference, the slower the heat conduction speed, that is, the heat storage inner tube 201 in heat storage structure 2 and heat storage outer tube 202 are provided with a certain degree of temperature difference, and heat storage outer tube 202 and heat storage shell 1 are also provided with a certain degree of temperature difference, thereby the heat conduction speed between heat storage inner tube 201 and heat storage outer tube 202, heat storage outer tube 202 and heat storage shell 1 is lower than the heat conduction speed of traditional heat storage device, so as to realize the heat energy of improving loss, when needing to reach the same heat preservation effect, the heat preservation material requirement of the molten salt heat storage device of the utility model is relatively lower, and the heat exchange subassembly 204 and connecting pipe 206 heat exchange the heat in heat storage structure 2 when needed.
[0023] Wherein as Figure 1As shown, a plurality of support columns 207 are fixedly installed between the heat storage inner cylinder 201 and the heat storage outer cylinder 202; the support columns 207 provide support and connection structure strength for the heat storage inner cylinder 201 and the heat storage outer cylinder 202; the outer wall of the heat storage shell 1 is fixed with heat preservation foam 5, and the inner wall of the heat storage shell 1 is filled with heat insulation material 6 between the outer wall of the heat storage structure 2; the function of the heat preservation foam 5 is to reduce the heat dissipation speed of the heat conducted on the heat storage shell 1 as much as possible, so as to maintain a temperature higher than that of the outside world and maintain a temperature difference with the heat storage structure 2; and the function of the heat insulation material 6 is to reduce the heat loss inside the heat storage structure 2 as much as possible; the top surface of the heat storage inner cylinder 201 and the heat storage outer cylinder 202 is provided with a heat insulation cavity 208; the inner wall of the heat insulation cavity 208 is filled with high-temperature-resistant heat insulation material 7; on the basis of maintaining a small temperature difference, the heat conduction efficiency is further reduced by the heat insulation material 7; the heat insulation material 7 not only needs to be high-temperature-resistant, but also needs to reduce the heat conduction speed of the heat storage inner cylinder 201 and the heat storage outer cylinder 202; the inner part of the cylinder cover 203 is provided with a heat insulation cavity 209; the heat insulation cavity 209 is filled with high-temperature-resistant heat insulation material 7.
[0024] As shown in the formula (1), the heat storage shell 1 is provided with a heat storage structure 2, and the heat storage structure 2 is provided with a heat storage inner cylinder 201 and a heat storage outer cylinder 202; the heat storage inner cylinder 201 and the heat storage outer cylinder 202 are connected by a cylinder cover 203; the heat storage inner cylinder 201 and the heat storage outer cylinder 202 are connected by a plurality of support columns 207; the heat storage inner cylinder 201 and the heat storage outer cylinder 202 are provided with a plurality of heat preservation gaskets 205; the heat storage inner cylinder 201 and the heat storage outer cylinder 202 are provided with a plurality of heating pipes 4; the heat storage inner cylinder 201 and the heat storage outer cylinder 202 are provided with a plurality of safety valves 8. Figure 2 As shown, two heat preservation gaskets 205 are heat preservation inner gaskets 2051 and heat preservation outer gaskets 2052 respectively; two heating pipes 4 are heating pipe A 401 and heating pipe B 402 respectively; the ratio of the heating power of the heating pipe A 401 and the heating pipe B 402 is 1.2-5; the heating pipe A 401 has higher heating power, so that the inside of the heat storage inner cylinder 201 is heated to a higher temperature; the cylinder cover 203 is fixedly installed with two safety valves 8; the two safety valves 8 are fixedly connected with a communication pipe 801 respectively; the two communication pipes 801 penetrate the cylinder cover 203 and are connected with the heat storage inner cylinder 201 and the heat storage outer cylinder 202 respectively; the function of the safety valve 8 and the communication pipe 801 is to avoid the pressure inside the heat storage inner cylinder 201 and the heat storage outer cylinder 202 exceeding the safety value.
[0025] It is worth noting that in the above system embodiment, each unit included is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be realized; in addition, the specific name of each functional unit is only for the convenience of mutual differentiation, and is not used to limit the protection scope of the present application.
[0026] The preferred embodiments disclosed above are only used to help describe the utility model. The preferred embodiments do not describe all the details and do not limit the utility model to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the utility model, so that the person skilled in the art can well understand and utilize the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.
Claims
1. A molten salt heat storage device, characterized by: The heat storage shell (1) is internally provided with a heat storage structure (2), and the heat storage structure (2) comprises a heat storage inner cylinder (201), a heat storage outer cylinder (202), a cylinder cover (203) and a heat exchange assembly (204). The heat storage shell (1) is internally provided with a heat storage structure (2), and the heat storage structure (2) comprises a heat storage inner cylinder (201), a heat storage outer cylinder (202), a cylinder cover (203) and a heat exchange assembly (204). The heat storage inner cylinder (201) and the heat storage outer cylinder (202) are internally filled with salt (3) used as a heat storage medium.
2. A fused salt heat storage device according to claim 1, wherein The heat storage inner cylinder (201) and the heat storage outer cylinder (202) are fixedly installed with a plurality of support columns (207).
3. The molten salt heat storage device of claim 1, wherein The heat storage shell (1) is externally provided with heat preservation foam (5), and the heat storage shell (1) is internally filled with heat preservation and heat insulation material (6) between the inner wall and the outer wall of the heat storage structure (2).
4. The molten salt heat storage device of claim 1, wherein, The heat storage inner cylinder (201) and the heat storage outer cylinder (202) are internally filled with heat preservation and heat insulation material (7).
5. The molten salt heat storage device of claim 1, wherein, The heat storage inner cylinder (201) and the heat storage outer cylinder (202) are internally filled with heat preservation and heat insulation material (7).
6. The molten salt heat storage device of claim 1, wherein, The heat storage inner cylinder (201) and the heat storage outer cylinder (202) are internally filled with heat preservation and heat insulation material (7).
7. The molten salt heat storage device of claim 1, wherein The heat storage inner cylinder (201) and the heat storage outer cylinder (202) are internally filled with heat preservation and heat insulation material (7). The heat storage inner cylinder (201) and the heat storage outer cylinder (202) are internally filled with heat preservation and heat insulation material (7). The heat storage inner cylinder (201) and the heat storage outer cylinder (202) are internally filled with heat preservation and heat insulation material (7).