Molten salt photo-thermal energy storage equipment

Abstract

The invention relates to the technical field of heat storage heating equipment, and particularly provides fused salt photo-thermal energy storage equipment. The device comprises a molten salt tank, a base mechanism is arranged at the bottom of the molten salt tank, the base mechanism comprises an outer shell and an inner shell, hydraulic supporting legs are arranged between the outer shell and the inner shell, gaps are formed between the outer shell and the inner shell, and mineral wool is arranged in the gaps. A stable and reliable supporting foundation is provided for the fused salt photo-thermal energy storage equipment, the stability and safety of the equipment in the operation process are ensured, in consideration of possible sinking of the equipment, a stable horizontal plane is provided for the equipment through the hydraulic supporting legs, the equipment is prevented from inclining or being damaged due to uneven stress, and the service life of the equipment is prolonged. The base mechanism is arranged, so that the equipment can be finely adjusted according to actual requirements in the installation, debugging and operation processes, the optimal operation state is achieved, and the base mechanism further provides good heat insulation and heat energy recovery for the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of heat storage and heating equipment, and in particular to a molten salt solar thermal energy storage device. Background Art

[0002] Molten salt tower solar thermal power generation uses heliostats to track the sun at all times to obtain maximum solar radiation. The heliostats reflect solar energy to the collector tower absorber. The collector tower molten salt absorber absorbs heat and rises to 1000 degrees Fahrenheit. The heated molten salt flows into the hot molten salt tank and is stored. When generating electricity, the molten salt in the molten salt tank exchanges heat with water to produce superheated steam to drive the steam turbine to generate electricity. After power generation, the steam with waste heat is cooled and enters the water storage tank for the next cycle. The whole process of molten salt tower solar thermal power generation achieves zero emissions, meets the current requirements of clean energy, and has good development prospects. In the molten salt tower solar thermal power generation system, the molten salt tank is a storage device for storing heat, which achieves heat storage by storing high-temperature liquid molten salt.

[0003] The inventor of this application found that there are the following problems in the practical use process:

[0004] The current structural design of the tank bottom is difficult. In addition to supporting the mass of the storage tank and the molten salt inside, this part is also used to reduce the heat dissipation loss of the tank bottom. Design errors can easily cause the equipment foundation to sink. If the settlement is uneven, the tank body will be locally stressed, deformed and torn, resulting in molten salt leakage accidents and the tank body being scrapped. At the same time, a large amount of money will be spent on subsequent cleaning work.

[0005] Therefore, it is necessary to provide a molten salt solar thermal energy storage device to solve the above technical problems. Summary of the invention

[0006] The technical problem to be solved by the present invention is that uneven settlement will cause local stress, deformation and tearing of the tank body, thereby leading to molten salt leakage and accidents. In view of the above-mentioned defects of the prior art, a molten salt solar thermal energy storage device is provided.

[0007] To achieve the above-mentioned purpose, the technical solution of the present invention is: a molten salt solar thermal energy storage device, comprising a molten salt tank, a base mechanism is arranged at the bottom of the molten salt tank, the base mechanism comprises an outer shell and an inner shell, a hydraulic support foot is arranged between the outer shell and the inner shell, a gap is arranged between the outer shell and the inner shell, mineral wool is arranged between the gap, and the top of the hydraulic support foot is fixedly connected to the inner top of the outer shell.

[0008] By adopting the above technical solution, the setting of the hydraulic support foot enables the base mechanism to provide extremely stable support for the molten salt tank, and the top of the hydraulic support foot is fixedly connected to the inner top of the outer shell, ensuring the effective transmission of the supporting force, thereby avoiding safety accidents caused by the equipment.

[0009] It is further provided that a cavity is provided on the top of the shell, a water tank is provided inside the cavity, and the water tank is used to absorb leaked heat, and a water pipe is provided on one side of the water tank.

[0010] By adopting the above technical solution, the cavity set on the top of the shell and the water tank inside the cavity provide an extra layer of safety protection for the equipment. During the operation of the molten salt tank, the water tank can absorb the leaked heat and reduce heat loss. If heat leakage occurs and the molten salt leaks from the bottom, the water tank can become a barrier to cool the molten salt, effectively improving the thermal safety of the equipment and reducing the risk of equipment damage or accidents caused by heat leakage.

[0011] It is further provided that a plurality of the hydraulic supporting feet are provided, the plurality of the hydraulic supporting feet are arranged in a concentric circle structure, and the hydraulic supporting feet are connected to an external oil pump.

[0012] By adopting the above technical solution, a plurality of hydraulic support feet are provided and arranged in a concentric circle structure, thereby enhancing the supporting stability and balance of the base mechanism on the molten salt tank. The plurality of hydraulic support feet can share the weight of the molten salt tank and the molten salt inside it, reducing the pressure on a single supporting point and avoiding equipment damage caused by local overload. The concentric circle arrangement makes the supporting force more evenly distributed, effectively preventing the tilting or deformation of the molten salt tank due to uneven force, and ensuring the long-term stable operation of the equipment.

[0013] It is further provided that a supporting mechanism is provided at the bottom of the base mechanism, the supporting mechanism comprises a concrete foundation, and a refractory brick wall is provided around the top of the concrete foundation.

[0014] By adopting the above technical solution, the setting of the concrete foundation provides a solid and stable support for the base structure and even the entire molten salt solar thermal energy storage equipment. The concrete foundation has extremely high bearing capacity and compressive strength, and can effectively transfer the weight of the molten salt tank and the molten salt inside it to the ground, ensuring the long-term use of the equipment.

[0015] It is further provided that the refractory brick wall is in an annular structure, and the interior of the refractory brick wall is filled with a heat-insulating refractory brick layer and foam glass.

[0016] By adopting the above technical solution, the refractory brick wall has a ring structure, which not only enhances its structural stability, but also makes the insulation effect more uniform. The ring structure can more effectively surround the bottom of the molten salt tank to form a continuous insulation barrier to prevent high-temperature heat from spreading around, ensuring that the equipment can still maintain stable performance in a high-temperature operating environment and reducing the thermal impact on the surrounding environment.

[0017] It is further provided that the heat-insulating refractory brick layer and the foam glass are arranged in sequence from top to bottom, and the heat-insulating refractory brick layer and the refractory brick wall are used to support the base mechanism.

[0018] By adopting the above technical solution, the insulating refractory brick layer and the foam glass are arranged in sequence from top to bottom, so that the thermal insulation performance of the support mechanism is improved in a hierarchical manner. The insulating refractory brick layer, as the first layer of thermal insulation material, directly faces the high temperature generated by the molten salt tank, and can effectively block the downward transfer of heat, providing support while protecting the concrete foundation from high temperature. The foam glass, as the second layer of thermal insulation material, further enhances the thermal insulation effect of the entire support mechanism, making it more difficult for heat to penetrate, thereby ensuring the temperature stability of the environment surrounding the equipment.

[0019] It is further provided that the space between the outer shell and the inner shell is filled with mineral wool, and a scale for detecting sedimentation is provided on the outer surface of the molten salt tank.

[0020] By adopting the above technical solution, the space between the outer shell and the inner shell is filled with mineral wool, which improves the thermal insulation performance of the equipment. Mineral wool, as a high-quality thermal insulation material, has a very low thermal conductivity and excellent thermal insulation performance, which can effectively prevent the high-temperature molten salt stored in the molten salt tank from dissipating heat to the outside, thereby reducing the loss of heat energy.

[0021] It is further configured that a salt inlet pipe and a salt outlet pipe are provided on the top of the molten salt tank, and a first control valve and a second control valve are provided on the salt inlet pipe and the salt outlet pipe respectively, the water tank is a cylindrical structure, and a chamfer is provided at the edge of the water tank, the water pipe includes a first water pipe and a second water pipe, and a third control valve and a fourth control valve are provided on the first water pipe and the second water pipe respectively.

[0022] By adopting the above technical solution, the water tank and the molten salt tank can be reliably controlled, thereby ensuring the normal operation of the equipment.

[0023] Compared with the related art, the molten salt solar thermal energy storage device provided by the present invention has the following beneficial effects:

[0024] The present invention provides a molten salt solar thermal energy storage device, which provides a stable and reliable supporting foundation for the molten salt solar thermal energy storage device through a base mechanism, ensures the stability and safety of the device during operation, takes into account the possible sinking of the equipment, and provides a stable horizontal plane for the equipment through hydraulic support feet to prevent the equipment from tilting or being damaged due to uneven force, so that the equipment can be fine-tuned according to actual needs during installation, debugging and operation to achieve the best operating state. The base mechanism also provides good heat insulation and heat energy recovery for the equipment, further protects the safety and stable operation of the equipment, and provides a strong guarantee for its precise adjustment and long-term stable operation.

[0025] The present invention provides a molten salt solar thermal energy storage device, which adopts a supporting mechanism to provide a solid and stable base for the molten salt solar thermal energy storage device, ensuring that the entire device can be firmly installed on the ground, enhancing the equipment's wind pressure resistance and earthquake resistance, and improving its overall stability. The concrete foundation, refractory brick wall and internal insulation material layer in the supporting mechanism together constitute an efficient insulation barrier, which effectively blocks the high-temperature heat generated by the molten salt tank from diffusing to the ground and the surrounding environment, reducing the impact of the equipment on the surrounding environment and buildings, while also protecting the concrete foundation from high-temperature erosion, thereby extending the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the explosion three-dimensional structure of the present invention;

[0028] Figure 3 It is a partial cross-sectional structural schematic diagram of the base mechanism and the support mechanism of the present invention;

[0029] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0030] Figure 5 It is a schematic diagram of the three-dimensional cutaway structure of the water tank of the present invention.

[0031] Numbers in the figure: 1. molten salt tank; 2. base mechanism; 201. outer shell; 202. inner shell; 203. hydraulic support foot; 204. gap; 205. mineral wool; 206. water tank; 207. water pipe; 2071. first water pipe; 2072. second water pipe; 208. cavity; 209. first circular ring group; 210. second circular ring group; 211. third circular ring group; 212. fourth circular ring group; 3. support mechanism; 301. concrete foundation; 302. refractory brick wall; 303. insulating refractory brick layer; 304. foam glass; 4. scale; 5. pipe outlet; 6. salt inlet pipe; 7. salt outlet pipe; 8. first control valve; 9. second control valve; 10. chamfer; 11. third control valve; 12. fourth control valve. DETAILED DESCRIPTION

[0032] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings, in which typical embodiments of the present invention are shown.

[0033] Embodiment 1:

[0034] like Figure 1-5As shown, a molten salt solar thermal energy storage device of the present invention comprises a molten salt tank 1, a base mechanism 2 is arranged at the bottom of the molten salt tank 1, the base mechanism 2 comprises an outer shell 201 and an inner shell 202, a hydraulic support foot 203 is arranged between the outer shell 201 and the inner shell 202, a gap 204 is arranged between the outer shell 201 and the inner shell 202, mineral wool 205 is arranged between the gap 204, the top of the hydraulic support foot 203 is fixedly connected to the inner top of the outer shell 201, the gap 204 between the outer shell 201 and the inner shell 202 is filled with mineral wool 205, and the gap Space is left for the equipment to move and fill. Mineral wool 205, as a high-quality thermal insulation material, can effectively prevent the high-temperature molten salt stored in the molten salt tank 1 from dissipating heat to the outside, thereby reducing the loss of heat energy. The hydraulic support foot 203 also has a fine-tuning function, so that during the operation of the equipment, if uneven settlement or horizontal deviation of the molten salt tank 1 is found, the hydraulic support foot 203 can be adjusted to make corrections in time to ensure that the molten salt tank 1 always remains in a horizontal state. A salt inlet pipe 6 and a salt outlet pipe 7 for entering and discharging salt are arranged on one side of the molten salt tank 1.

[0035] like Figure 3 and Figure 4 As shown, a cavity 208 is provided on the top of the shell 201, and a water tank 206 is provided inside the cavity 208. The water tank 206 is used to absorb leaked heat. A water pipe 207 is provided on one side of the water tank 206. The water pipe 207 provided on one side of the water tank 206 provides convenience for heat management and recovery. The hot water can be promptly discharged through the water pipe 207 passing through the outlet 5, and new cold water can be poured in to maintain the cooling effect of the water tank, which can avoid overheating of the water tank or provide additional cooling effect. The discharged hot water can also be used in other links requiring thermal energy, such as preheating other working media, etc., thereby realizing the recovery and reuse of thermal energy and improving the energy efficiency of the entire system.

[0036] like Figure 2 , Figure 3 and Figure 4As shown, there are multiple hydraulic support feet 203, and the multiple hydraulic support feet 203 are arranged in a concentric circle structure. The hydraulic support feet 203 are connected to an external oil pump. The hydraulic support feet 203 are connected to the external oil pump, so as to realize remote control and precise adjustment of the hydraulic support feet. Through the external oil pump, the height and supporting force of the hydraulic support feet can be conveniently adjusted to meet the needs under different working conditions. There are multiple hydraulic support feet 203 on the first circular ring group 209, and the hydraulic support feet 203 on the second circular ring group 210 are located at the gap position of the hydraulic support feet 203 of the first circular ring group 209, the hydraulic support feet 204 of the third circular ring group 211 are located at the gap position of the hydraulic support feet 203 of the second circular ring group 210, and the hydraulic support feet 204 of the fourth circular ring group 212 are located at the gap position of the hydraulic support feet 203 of the third circular ring group 211, so that the hydraulic support feet 203 between different ring groups are staggered.

[0037] like Figure 3 and Figure 4 As shown, the space between the outer shell 201 and the inner shell 202 is filled with mineral wool 205, and a scale 4 for detecting settlement is provided on the outer surface of the molten salt tank 1. During the operation of the equipment, due to the influence of various factors, the molten salt tank 1 may have a slight settlement or deformation. By observing the changes in the scale 4, the settlement of the molten salt tank can be discovered and monitored in time, so that corresponding measures can be taken for adjustment or maintenance.

[0038] In the implementation, first, during the operation of the molten salt solar thermal energy storage device, the base mechanism 2 provides stable support for the molten salt tank 1 through the hydraulic support feet 203 and the solid structure of the outer shell 201 and the inner shell 202;

[0039] When the staff detects uneven settlement of the molten salt tank 1 through the scale 4, the hydraulic support foot 203 is activated and fine-tuned according to the actual situation to ensure that the molten salt tank 1 always remains horizontal. At the same time, emergency repairs are carried out to stabilize the state of the equipment to avoid stress concentration or damage caused by imbalance.

[0040] In daily use, the water tank 206 can absorb the heat at the bottom of the molten salt tank 1 and reduce heat dissipation. When the temperature monitor inside the water tank detects that the temperature of the water tank is too high, the system can immediately export the hot water in the water tank 206 through the water pipe 207 and inject cold water to lower the temperature. At the same time, the exported hot water can recover heat and improve the utilization rate of heat.

[0041] Embodiment 2:

[0042] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, on the basis of embodiment 1, the present invention provides a technical solution: a supporting mechanism 3 is arranged at the bottom of the base mechanism 2, and the supporting mechanism 3 includes a concrete foundation 301, and a refractory brick wall 302 is arranged around the top of the concrete foundation 301. The refractory brick wall 302 arranged around the top of the concrete foundation 301 provides an additional protective barrier for the equipment. The refractory brick wall has excellent high temperature resistance and heat insulation performance, and can effectively prevent the high temperature heat generated by the molten salt tank 1 during operation from diffusing to the surrounding environment, thereby reducing the impact of the equipment on the surrounding environment and buildings.

[0043] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the refractory brick wall 302 is annular in structure, and the interior of the refractory brick wall 302 is filled with an insulating refractory brick layer 303 and foam glass 304. The interior of the refractory brick wall 302 is filled with an insulating refractory brick layer 303 and foam glass 304. The insulating refractory brick layer 303 has thermal insulation properties, can withstand the high temperature generated by the molten salt tank 1, and effectively block the transfer of heat, while the foam glass 304, with its excellent thermal insulation properties and lightweight characteristics, provides an additional insulation layer for the equipment, while reducing the weight of the entire supporting mechanism.

[0044] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the insulating refractory brick layer 303 and the foam glass 304 are arranged in sequence from top to bottom, and the insulating refractory brick layer 303 and the refractory brick wall 302 are used to support the base mechanism 2. The insulating refractory brick layer 303 and the refractory brick wall 302 are used together to support the base mechanism 2, which improves the overall stability of the equipment. The insulating refractory brick layer 303 not only has a heat-insulating function, but also provides a stable support for the base mechanism 2 due to its solid material and reasonable arrangement. The refractory brick wall 302, as a ring structure, enhances the stability of the equipment and ensures the stable operation of the equipment in harsh environments.

[0045] During implementation, firstly, the concrete foundation 301 and the refractory brick wall 302 can provide reliable support for the equipment and ensure the stability of the equipment. At the same time, the insulating refractory brick layer 303 and the foam glass 304 can further reduce the heat dissipated to the outside. The refractory brick wall 302 and other parts in the support mechanism 3 also play a role of insulation, reducing the impact of the heat generated during the operation of the equipment on the surrounding environment. It can also protect the equipment from external corrosion and other factors.

[0046] The advantages of this technical solution in practical applications include but are not limited to the following:

[0047] 1. Provide a stable horizontal surface for the equipment through hydraulic support feet to prevent the equipment from tilting or being damaged due to uneven force;

[0048] 2. The concrete foundation, refractory brick wall and internal insulation material layer in the supporting structure together form an efficient insulation barrier, which effectively prevents the high temperature heat generated by the molten salt tank from spreading to the ground and the surrounding environment.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A molten salt solar thermal energy storage device, characterized in that: The invention comprises a molten salt tank (1), wherein a base mechanism (2) is arranged at the bottom of the molten salt tank (1), wherein the base mechanism (2) comprises an outer shell (201) and an inner shell (202), wherein a hydraulic support foot (203) is arranged between the outer shell (201) and the inner shell (202), wherein a gap (204) is arranged between the outer shell (201) and the inner shell (202), wherein mineral wool (205) is arranged between the gap (204), and wherein the top of the hydraulic support foot (203) is fixedly connected to the inner top of the outer shell (201).

2. The molten salt solar thermal energy storage device according to claim 1 is characterized in that: A cavity (208) is provided at the top of the shell (201), a water tank (206) is provided inside the cavity (208), and the water tank (206) is used to absorb leaked heat, and a water pipe (207) is provided on one side of the water tank (206).

3. The molten salt solar thermal energy storage device according to claim 1 is characterized in that: A plurality of the hydraulic support feet (203) are provided, and the plurality of the hydraulic support feet (203) are arranged in a concentric circle structure. The hydraulic support feet (203) are connected to an external oil pump.

4. The molten salt solar thermal energy storage device according to claim 1 is characterized in that: A support mechanism (3) is arranged at the bottom of the base mechanism (2), and the support mechanism (3) comprises a concrete foundation (301). Refractory brick walls (302) are arranged around the top of the concrete foundation (301).

5. The molten salt solar thermal energy storage device according to claim 4 is characterized in that: The refractory brick wall (302) is an annular structure, and the interior of the refractory brick wall (302) is filled with a heat-insulating refractory brick layer (303) and foam glass (304).

6. The molten salt solar thermal energy storage device according to claim 5 is characterized in that: The heat-insulating refractory brick layer (303) and the foam glass (304) are arranged in sequence from top to bottom, and the heat-insulating refractory brick layer (303) and the refractory brick wall (302) are used to support the base mechanism (2).

7. The molten salt solar thermal energy storage device according to claim 1 is characterized in that: The space between the outer shell (201) and the inner shell (202) is filled with mineral wool (205), and a scale (4) for detecting sedimentation is provided on the outer surface of the molten salt tank (1).

8. The molten salt solar thermal energy storage device according to claim 1 is characterized in that: A salt inlet pipe (6) and a salt outlet pipe (7) are arranged on the top of the molten salt tank (1), and a first control valve (8) and a second control valve (9) are arranged on the salt inlet pipe (6) and the salt outlet pipe (7), respectively.

9. The molten salt solar thermal energy storage device according to claim 2, characterized in that: The water tank (206) is in a cylindrical structure, and a chamfer (10) is provided at the edge of the water tank (206).

10. The molten salt solar thermal energy storage device according to claim 2, characterized in that: The water pipe (207) comprises a first water pipe (2071) and a second water pipe (2072), and a third control valve (11) and a fourth control valve (12) are respectively provided on the first water pipe (2071) and the second water pipe (2072).

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