Multi-layer composite high-temperature molten salt storage tank

Abstract

The invention belongs to the technical field of high-temperature heat storage, and relates to a multi-layer composite high-temperature fused salt storage tank. The closed tank body is formed between the tank top and the tank body and used for storing high-temperature fused salt, the fused salt can be effectively prevented from making contact with the external environment, heat loss is reduced, and the heat energy storage efficiency is improved. The inner heat-resistant concrete layer is in direct contact with high-temperature molten salt, and the outer layer structure is protected against damage. The fire-resistant insulating brick layer can prevent heat from being transferred outwards, and the heat energy storage efficiency is improved. The outer heat-resistant concrete layer further enhances the heat resistance and the overall strength of the storage tank and corresponds to the inner heat-resistant concrete layer to form a closed heat-resistant protection system. The structural layer is a main bearing layer for molten salt pressure in the storage tank, and the mechanical property stability of the structural layer can be guaranteed. The heat storage device can meet the energy storage requirements of different working temperatures and molten salt media, the heat loss is reduced through the multi-layer composite structure, the heat energy storage efficiency is improved, and the energy consumption and the operation cost are reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of high-temperature heat storage and relates to a multilayer composite high-temperature molten salt storage tank. BACKGROUND

[0002] Heat storage has advantages of large capacity, long period, multiple frequency, high safety, low cost and flexible configuration, can meet the requirements of energy supply and demand matching in time, space and intensity, and is one of the core directions of future large-scale energy storage. It has broad application prospects in coal power steam storage, solar thermal power generation, new energy consumption, industrial electrification and cross-season heating fields. Molten salt energy storage is the most widely used and most mature technology among heat storage methods, and can economically store heat energy by using the characteristics of high gasification temperature of molten salt.

[0003] The molten salt storage tank needs to have high heat storage capacity and high stability, which is the key to ensure the stable operation of the heat storage system. Taking the commonly used binary nitrate as an example, the molten salt in the heat tank needs to be maintained at 500 DEG C or higher during operation, and the molten salt is highly corrosive. At present, the expensive 347H stainless steel is often selected as the tank body material of the high-temperature storage tank, but its creep temperature is 538 DEG C, which is prone to creep damage, bringing great safety hazards to the operation of the tank body. At the same time, the current large-scale molten salt heat storage tank is a vertical cylindrical steel welded structure, and stress concentration is prone to occur at the connection between the tank wall and the tank bottom, which may cause the tank to rupture and the molten salt to leak. Once a leakage accident occurs, the entire heat storage system may be shut down for several months, or even be disabled, and in severe cases, safety accidents may also occur.

[0004] In order to further improve the efficiency of heat storage and expand the application scenarios of heat storage, the molten salt medium may use a mixture of chlorinated salt or carbonate in the future, and its working temperature will reach about 700 DEG C, which puts higher requirements on the corrosion resistance of the metal storage tank, and the cost of the storage tank is higher and the construction difficulty is further increased.

[0005] In summary, the existing molten salt storage tank cannot meet the current energy storage demand and has the problem of insufficient safety. SUMMARY

[0006] The purpose of the present application is to provide a multilayer composite high-temperature molten salt storage tank to solve the technical problem that the existing molten salt storage tank cannot meet the current energy storage demand and has the problem of insufficient safety.

[0007] In order to achieve the above purpose, the following technical solutions are adopted in the present application: The present application provides a multilayer composite high-temperature molten salt storage tank, which comprises a tank top and a tank body, and a closed tank body is formed between the tank top and the tank body. The tank body comprises a structure layer and a functional layer, the functional layer comprises, from inside to outside, an inner layer of heat-resistant concrete, a layer of fire-resistant insulation bricks and an outer layer of heat-resistant concrete, and the structure layer is located outside the outer layer of heat-resistant concrete.

[0008] Further, the tank top comprises a top cover plate and a carbon steel dome, the top cover plate is located between the tank body and the carbon steel dome, the carbon steel dome is convex towards a side away from the tank body and is fixedly connected with the tank body, and the top cover plate is provided with thermal insulation material.

[0009] Further, the carbon steel dome and the top cover plate are connected through a plurality of hangers.

[0010] Further, the carbon steel dome is convex away from the top cover plate and the cross section of the carbon steel dome is a circular arc surface, and the surface of the carbon steel dome is coated with a rust-proof coating.

[0011] Further, the inner layer of heat-resistant concrete is formed by on-site pouring of ceramic castable and high-temperature consolidation; The layer of fire-resistant insulation bricks is formed by masonry of a plurality of clay insulation bricks, and the clay insulation bricks are profiled bricks; The outer layer of heat-resistant concrete is formed by on-site pouring of clay lightweight castable.

[0012] Further, the connecting surfaces between the clay insulation bricks are curved surface joints; The clay insulation bricks located at the connecting part of the side wall and the bottom of the tank body and the side wall of the tank body are curved bricks.

[0013] Further, a plurality of thermocouples, displacement sensors and osmotic pressure gauges are embedded in the tank body; A liquid level monitor is arranged on the tank body.

[0014] Further, the structure layer comprises a concrete structure layer and an outer tank bottom, the concrete structure layer is located at the periphery of the side wall of the tank body, the outer tank bottom is located at the bottom of the tank body, the concrete structure layer and the outer tank bottom are fixedly connected, and the concrete structure layer and the outer tank bottom are fixedly connected with the outer layer of heat-resistant concrete; A cold air pipe is laid in the outer tank bottom.

[0015] Further, the concrete structure layer adopts prestressed reinforced concrete, and steel fibers are mixed in the prestressed reinforced concrete; The outer tank bottom is formed by on-site pouring of reinforced concrete.

[0016] Further, the multi-layer composite high-temperature molten salt storage tank is provided with a salt inlet and a salt outlet.

[0017] Compared with the prior art, the application has the following beneficial effects: The closed tank body formed between the tank top and the tank body can effectively prevent the molten salt from contacting the external environment, reduce heat loss, and improve the thermal energy storage efficiency. The inner layer of heat-resistant concrete layer directly contacts the high-temperature molten salt, which can effectively resist the erosion and high-temperature effect of the molten salt and protect the outer layer structure from damage. The refractory insulation brick layer can prevent heat from being transmitted outward, reduce heat loss, and improve the thermal energy storage efficiency. The outer layer of heat-resistant concrete layer further enhances the heat resistance and overall strength of the storage tank, which is in harmony with the inner layer of heat-resistant concrete layer, forming a closed heat-resistant protection system. The structural layer is the main bearing layer of the internal molten salt pressure of the storage tank, which is arranged on the outer side of the outer layer of heat-resistant concrete layer. The heat insulation effect of the functional layer can be utilized to reduce the influence of high temperature and molten salt corrosion on the structural layer, and ensure the stability of the mechanical properties of the structural layer. At the same time, the structural layer arranged on the outermost layer is also conducive to the maintenance of the structural layer, improving the overall reliability and safety of the storage tank. The application can adapt to the energy storage needs of different working temperatures and molten salt media, and can maintain stable operation in harsh environments such as high temperature, greatly improving the safety and reliability of the thermal energy storage system. The multi-layer composite structure of the application reduces heat loss, improves thermal energy storage efficiency, reduces energy consumption and operating costs. In addition, the construction materials of the storage tank are relatively common and low in cost, reducing the construction difficulty and cost of the storage tank, and being conducive to the popularization and application of thermal energy storage technology. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a top view of the side wall of the tank body of the embodiment of the application; Figure 2 is a schematic view of the connection between the side wall and the tank bottom of the tank body of the embodiment of the application; Figure 3 is a schematic view of the connection between the side wall and the tank top of the tank body of the embodiment of the application.

[0019] 1, side wall; 1a, inner layer of heat-resistant concrete layer; 1b, refractory insulation brick layer; 1c, outer layer of heat-resistant concrete layer; 1d, concrete structural layer; 2, tank bottom; 2a, inner tank bottom; 2b, outer tank bottom; 3, tank top; 4, top cover plate; 5, thermal insulation material; 6, lifting rod; 7, tank body; 8, cold air pipe; 9, carbon steel dome. DETAILED DESCRIPTION

[0020] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, so that those skilled in the art can better understand the present application. Obviously, the described embodiments are only a 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 work should belong to the scope of protection of the present application.

[0021] It should be noted that the terms "first", "second", and the like in the specification of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0022] The present application will be described in further detail below with reference to the drawings: Referring to Figure 2 and Figure 3 The present application discloses a multi-layer composite high-temperature molten salt storage tank, comprising a tank top 3 and a tank body 7, a closed tank body is formed between the tank top 3 and the tank body 7 for storing high-temperature molten salt, which can effectively prevent the molten salt from contacting with the external environment, reduce heat loss and improve the efficiency of thermal energy storage.

[0023] Referring to Figure 1 and Figure 2The tank body 7 comprises a structural layer and a functional layer, and the functional layer comprises, from inside to outside, an inner heat-resistant concrete layer 1a, a fire-resistant and heat-insulating brick layer 1b and an outer heat-resistant concrete layer 1c. The inner heat-resistant concrete layer 1a directly contacts the high-temperature molten salt, has good heat resistance and corrosion resistance, can effectively resist the erosion and high-temperature action of the molten salt, protect the outer structure from damage, prevent the molten salt from leaking and prolong the service life of the storage tank. The fire-resistant and heat-insulating brick layer 1b has excellent fire resistance and heat insulation performance, can prevent heat from being transmitted outward, reduce the loss of heat energy and improve the heat storage efficiency. The outer heat-resistant concrete layer 1c further enhances the heat resistance and overall strength of the storage tank, and is in harmony with the inner heat-resistant concrete layer to form a closed heat-resistant protection system. The structural layer is located outside the outer heat-resistant concrete layer 1c, and is the main bearing layer of the molten salt pressure in the storage tank. On the one hand, the structural layer is arranged outside the outer heat-resistant concrete layer 1c to utilize the heat insulation effect of the functional layer, reduce the influence of high temperature and molten salt corrosion on the structural layer and ensure the stability of the mechanical properties of the structural layer. On the other hand, this layout is also conducive to the maintenance of the structural layer and improves the overall reliability and safety of the storage tank.

[0024] Referring to Figure 3 In the embodiment of the present application, the tank top 3 comprises a top cover plate 4 and a carbon steel dome 9, the top cover plate 4 is located between the tank body 7 and the carbon steel dome 9, the carbon steel dome 9 is convex towards the side away from the tank body 7 and is fixedly connected with the tank body 7, and the top cover plate 4 is provided with heat insulation material 5.

[0025] Referring to Figure 3 In the embodiment of the present application, the carbon steel dome 9 and the top cover plate 4 are connected through a plurality of hangers 6.

[0026] Referring to Figure 3 In the embodiment of the present application, the carbon steel dome 9 is convex away from the top cover plate 4, the cross section of the carbon steel dome 9 is a circular arc surface, and the surface of the carbon steel dome 9 is coated with a rust-proof coating.

[0027] In the embodiment of the present application, the inner heat-resistant concrete layer 1a is formed by on-site pouring of ceramic castable and high-temperature consolidation; The fire-resistant and heat-insulating brick layer 1b is formed by masonry of a plurality of clay heat-insulating bricks, and the clay heat-insulating bricks are profiled bricks; The outer heat-resistant concrete layer 1c is formed by on-site pouring of clay lightweight castable.

[0028] Referring to Figures 1 to 3 In the embodiment of the present application, the connecting surfaces between the clay heat-insulating bricks are curved joints; The clay insulation bricks located at the joint of the side wall and the bottom of the tank body 7 and the side wall of the tank body 7 are curved bricks, so as to adapt to the cylindrical side wall and improve the stress capacity.

[0029] In the embodiment of the present application, a plurality of thermocouples, displacement sensors and osmotic pressure gauges are embedded in the tank body 7, the thermocouples are used to monitor the temperature in the tank in real time, the displacement sensors are used to monitor the deformation of the side wall 1, and the osmotic pressure gauges are used to monitor whether the tank body 7 leaks, thereby improving the safety of the high-temperature molten salt storage tank.

[0030] A liquid level monitor is arranged on the tank body 7 to monitor the molten salt liquid level in the tank in real time.

[0031] Referring to Figure 2 In the embodiment of the present application, the structural layer comprises a concrete structural layer 1d located at the periphery of the side wall of the tank body 7 and an outer tank bottom 2b located at the bottom of the tank body 7, the concrete structural layer 1d and the outer tank bottom 2b are fixedly connected, and the concrete structural layer 1d and the outer tank bottom 2b are both fixedly connected with the outer layer of heat-resistant concrete layer 1c. Referring to Figure 2 The outer tank bottom 2b is paved with a cold air pipe 8.

[0032] In the embodiment of the present application, the concrete structural layer 1d adopts prestressed reinforced concrete, and steel fibers are mixed in the prestressed reinforced concrete. The outer tank bottom 2b is made of reinforced concrete and is cast on site.

[0033] In the embodiment of the present application, the multi-layer composite high-temperature molten salt storage tank is provided with a salt inlet and a salt outlet.

[0034] The present application can adapt to different working temperatures and energy storage requirements of molten salt medium through unique structural design, can maintain stable operation in harsh environments such as high temperature, and greatly improves the safety and reliability of the thermal energy storage system. At the same time, the multi-layer composite structure reduces heat loss, improves thermal energy storage efficiency, reduces energy consumption and operating cost. In addition, the construction materials of the storage tank are relatively common and low in cost, which reduces the construction difficulty and cost of the storage tank, is conducive to the popularization and application of thermal energy storage technology, expands the application scenarios of thermal energy storage, and provides strong support for the development of large-scale energy storage in the future.

[0035] Embodiment two: Referring to Figures 1 to 3 The present application provides a multi-layer composite high-temperature molten salt storage tank. The present application has a wide range of applications, can effectively prevent molten salt leakage, can provide larger energy storage capacity, and can effectively reduce cost.

[0036] The present application comprises a multi-layer anti-seepage structure of molten salt and a concrete structural layer 1d.

[0037] In the embodiment of the present application, the multiple layers are sequentially arranged from the inside to the outside as the inner heat-resistant concrete layer 1a, the fireproof and heat-insulating brick layer 1b, the outer heat-resistant concrete layer 1c and the concrete structure layer 1d.

[0038] In the embodiment of the present application, the inner heat-resistant concrete layer 1a directly contacts with the high-temperature molten salt, is cast on site by using ceramic castable and is consolidated at high temperature, and can effectively resist high temperature and prevent the molten salt from leaking.

[0039] In the embodiment of the present application, the fireproof and heat-insulating brick layer 1b is formed by on-site masonry of clay heat-insulating bricks, has the advantages of fireproof and heat-insulating and low price, is used for heat insulation and allows the molten salt to solidify inside and finally fill the pores.

[0040] In the embodiment of the present application, the outer heat-resistant concrete layer 1c is used for further reducing the temperature and preventing the molten salt from leaking, and is cast on site by using clay lightweight castable.

[0041] In the embodiment of the present application, the concrete structure layer 1d mainly bears the hydrostatic pressure of the molten salt, and is made of prestressed reinforced concrete, and steel fibers are mixed into the prestressed reinforced concrete to improve the temperature resistance.

[0042] In the embodiment of the present application, the top of the side wall 1 is provided with a top cover plate 4, the top cover plate 4 is paved with heat-insulating material 5, the end of the tank top 3 is connected with the upper end of the tank concrete structure layer 1d, and the tank top 3 is connected with the top cover plate 4 through multiple hangers 6.

[0043] In the embodiment of the present application, thermocouples, displacement sensors for monitoring the deformation of the side wall 1 and osmometers for monitoring the leakage of the weld are arranged at the inner heat-resistant concrete layer 1a, the fireproof and heat-insulating brick layer 1b, the outer heat-resistant concrete layer 1c and the concrete structure layer 1d, the thermocouples are used for monitoring the temperature in the tank in real time, and a monitor for monitoring the liquid level of the molten salt is arranged inside the side wall 1.

[0044] Example three As shown in Figure 1 , Figure 2 and Figure 3 , the embodiment discloses a multiple-layer composite high-temperature molten salt storage tank, which comprises a side wall 1, a tank bottom 2 and a tank top 3, the side wall 1 is composed of an inner heat-resistant concrete layer 1a, a fireproof and heat-insulating brick layer 1b, an outer heat-resistant concrete layer 1c and a concrete structure layer 1d, a top cover plate 4 is arranged on the top of the concrete structure layer 1d, heat-insulating material 5 is paved on the top cover plate 4, the end of the tank top 3 is connected with the upper end of the side wall 1, the tank top 3 is connected with the top cover plate 4 through a hanger 6, a reinforced concrete foundation 7 is used as the foundation of the storage tank, and a cold air pipe 8 is paved in the middle.

[0045] The inner layer of heat-resistant concrete layer 1a is resistant to high temperature and corrosion, the fire-resistant insulation brick layer 1b can be penetrated by molten salt, and the outer layer of heat-resistant concrete 1c can also be penetrated by molten salt, but the molten salt will eventually solidify in the layer. The hydrostatic pressure of the molten salt is transmitted from the inner layer of heat-resistant concrete layer 1a, the fire-resistant insulation brick layer 1b and the outer layer of heat-resistant concrete 1c to the concrete structure layer 1d in turn. The whole storage tank meets the requirements of no leakage of molten salt and good heat preservation performance, and the tank material is easy to obtain and the construction technology is mature.

[0046] The tank top 3 can be made of carbon steel, etc., and the surface needs to be treated with a special anti-rust coating to form a dense protective layer, effectively isolating air, moisture and corrosive media, reducing the attachment of pollutants and further prolonging the protection period.

[0047] The fire-resistant brick layer 1b can adopt a special-shaped brick as shown in Figures 1 to 3 The special-shaped brick has curved joints on the front and back and upper and lower ends to ensure that the molten salt does not leak out of the joints. At the same time, the special-shaped brick requires a certain curvature to ensure uniform transmission of the hydrostatic pressure of the molten salt in the radial direction. The fire-resistant brick layer 1b is bonded with high-temperature and corrosion-resistant mortar during construction.

[0048] The tank bottom 2 is composed of an inner tank bottom 2a and an outer tank bottom 2b, wherein the inner tank bottom 2a and the inner layer of heat-resistant concrete layer 1a, the fire-resistant insulation brick layer 1b and the outer layer of heat-resistant concrete layer 1c of the tank wall are arranged in the same way, and the outer tank bottom 2b is made of reinforced concrete and cast in place.

[0049] The cold air pipe 8 is arranged on the outer tank bottom 2b, and the installation position of the cold air pipe 8 is kept a certain distance from the reinforced concrete foundation 7.

[0050] The sidewall 1 of the present application realizes self-compaction by adopting a multi-layer composite structure and utilizing the characteristic that the temperature of the molten salt can be reduced to the solidification point, avoiding the influence of high temperature on the structural performance of the concrete structure layer 1d and effectively prolonging the service life of the storage tank.

[0051] The design concept of the tank top of the present application is a self-supporting carbon steel dome 9, which can uniformly transmit the load to the tank wall and reduce the amount of welding and material cost.

[0052] The multi-layer composite high-temperature molten salt storage tank of the present application realizes self-compaction of the pores of the heat insulation material by molten salt by using multi-layer composite heat insulation material to reduce the temperature of the molten salt to the solidification point, which can theoretically realize no leakage of molten salt.

[0053] The inner layer of heat-resistant concrete layer 1a directly contacting the high-temperature molten salt layer in the multi-layer composite high-temperature molten salt storage tank of the present application is a ceramic castable, which has the advantages of high density, high strength, wear resistance, etc., and is simple and convenient to operate.

[0054] The multilayer composite high-temperature molten salt storage tank provided by the application does not contain metal materials in the tank wall and the foundation, effectively avoiding the problem of molten salt leakage caused by the rupture of the welding seam of the metal material.

[0055] The outermost layer of the multilayer composite high-temperature molten salt storage tank provided by the application is a prestressed reinforced concrete containing steel fibers as a structural layer. This design breaks through the size bottleneck caused by the strength limitation of the welding seam of the existing metal storage tank, can realize the large-scale of the storage tank, significantly improves the molten salt storage capacity, and thus meets the demand of larger-scale energy storage.

[0056] The multilayer composite high-temperature molten salt storage tank provided by the application works at a suitable temperature, is not affected by high temperature, and only bears static liquid pressure. The strength of the concrete structural layer can be maintained in theory during the designed service life, so that the entire molten salt storage tank will not have a large-area leakage problem and will not cause environmental pollution.

[0057] The arrangement method of the multilayer composite high-temperature molten salt storage tank provided by the application is flexible, and can adopt a conventional ground arrangement method or an underground or semi-underground arrangement method.

[0058] The above content only illustrates the technical idea of the application, and cannot limit the protection scope of the application. Any modification made according to the technical idea of the application on the basis of the technical solution falls within the protection scope of the application.

Claims

1. A multi-layered composite high temperature molten salt storage tank characterized in that, The tank top (3) and the tank body (7) form a closed tank body therebetween; The tank body (7) comprises a structure layer and a functional layer, the functional layer comprises an inner layer of heat-resistant concrete layer (1a), a fireproof insulation brick layer (1b) and an outer layer of heat-resistant concrete layer (1c) arranged in sequence from inside to outside, and the structure layer is located outside the outer layer of heat-resistant concrete layer (1c).

2. A multi-layered composite high temperature molten salt storage tank according to claim 1, wherein, The tank top (3) comprises a top cover plate (4) and a carbon steel dome (9), the top cover plate (4) is located between the tank body (7) and the carbon steel dome (9), the carbon steel dome (9) is convex towards the side away from the tank body (7) and is fixedly connected with the tank body (7), and the top cover plate (4) is provided with heat preservation material (5).

3. A multi-layered composite high temperature molten salt storage tank according to claim 2, wherein, The carbon steel dome (9) and the top cover plate (4) are connected through a plurality of hangers (6).

4. The multi-layered composite high temperature molten salt storage tank of claim 2, wherein, The carbon steel dome (9) is convex away from the top cover plate (4) and the cross section of the carbon steel dome (9) is a circular arc surface, and the surface of the carbon steel dome (9) is coated with a rust-proof coating.

5. The multi-layered composite high temperature molten salt storage tank of claim 1, wherein, The inner layer of heat-resistant concrete layer (1a) is formed by on-site pouring and high-temperature consolidation of ceramic castable; The fireproof insulation brick layer (1b) is formed by on-site masonry of a plurality of clay insulation bricks, and the clay insulation bricks are profiled bricks; The outer layer of heat-resistant concrete layer (1c) is formed by on-site pouring of clay lightweight castable.

6. A multi-layered composite high temperature molten salt storage tank according to claim 5, wherein, The connecting surfaces between the clay insulation bricks are curved surface joints; The clay insulation bricks located at the connecting part of the side wall and the bottom of the tank body (7) and the side wall of the tank body (7) are curved surface bricks.

7. The multi-layered composite high temperature molten salt storage tank of claim 1, wherein, A plurality of thermocouples, displacement sensors and osmotic pressure gauges are embedded in the tank body (7); A liquid level monitor is arranged on the tank body (7).

8. The multi-layer composite high temperature molten salt storage tank of claim 1, wherein, The structure layer comprises a concrete structure layer (1d) and an outer tank bottom (2b), the concrete structure layer (1d) is located at the periphery of the side wall of the tank body (7), the outer tank bottom (2b) is located at the bottom of the tank body (7), the concrete structure layer (1d) and the outer tank bottom (2b) are fixedly connected, and the concrete structure layer (1d) and the outer tank bottom (2b) are fixedly connected with the outer layer of heat-resistant concrete layer (1c); The outer tank bottom (2b) is paved with a cold air pipe (8).

9. The multi-layer composite high temperature molten salt storage tank of claim 8, wherein, The concrete structure layer (1d) adopts prestressed reinforced concrete, and steel fibers are mixed in the prestressed reinforced concrete; The outer tank bottom (2b) is formed by on-site pouring of reinforced concrete.

10. The multi-layered composite high temperature molten salt storage tank of claim 1, wherein, The multi-layer composite high-temperature molten salt storage tank is provided with a salt inlet and a salt outlet.

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