Waterproof heat preservation foundation of high-temperature molten salt storage tank
By raising the foundation and adopting waterproof structural measures, the problem of molten salt storage tank foundation being susceptible to water in areas with rich groundwater or rainwater is solved, effectively protecting the insulation material and stable operation of the high-temperature storage tank foundation are achieved.
Patent Information
- Application Number
- CN202421823303.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-30
AI Technical Summary
The existing molten salt storage tank foundation is susceptible to water in areas rich in groundwater or rainwater, resulting in moisture in insulation materials, reduced insulation performance, and even reduced bearing capacity and uneven settlement.
By lifting the foundation as a whole, the insulation foundation is lifted above the ground, and waterproof structural measures such as rainproof cover plates, water barrier edges, and liquid drainage ditches are adopted to prevent rainwater and groundwater from entering the insulation layer and solve the water immersion problem from the source.
It effectively prevents rainwater and groundwater from entering the insulation layer, minimizes the risk of insulation materials failure, and ensures the stability and safety of the high-temperature storage tank foundation in groundwater or rainwater-rich areas.
Smart Images
Figure CN222822312U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical fields of new energy, energy storage, photothermal and solar energy, and in particular relates to a waterproof high-temperature molten salt storage tank insulation foundation. Background Art
[0002] Most of the existing molten salt heat storage projects are located in the northwest region, where rainfall is low and groundwater levels are low. Common molten salt storage tank foundations hardly need to consider the impact of groundwater. Currently, common storage tank foundations are generally semi-buried, divided into two parts: a load-bearing foundation and a thermal insulation foundation. The ventilation pipes are arranged in the sand and gravel cushion layer at the bottom of the load-bearing foundation or the thermal insulation foundation. The load-bearing foundation is similar to the conventional foundation design, while the thermal insulation foundation is mainly composed of thermal insulation materials (commonly used expanded clay, vitrified bricks, calcium silicate boards, etc.), with a ring wall around it to provide lateral support for the thermal insulation material filled inside. Figure 1 shown.
[0003] With the development of the energy storage industry, molten salt energy storage projects have also begun to be built in the southern region. The rainy environment and high groundwater level have a significant impact on the thermal insulation and stress-bearing properties of the insulation materials of the molten salt storage tank foundation.
[0004] The insulation foundation not only provides structural support for the storage tank, but also forms an insulation layer at the bottom of the tank to prevent the heat loss of high-temperature molten salt. When groundwater or rainwater enters the insulation layer, the insulation material will be damp and its insulation performance will be reduced or fail. On the one hand, the heat loss will increase, and on the other hand, the temperature of the bearing foundation will increase and reduce the bearing capacity. If the water cannot be discharged in time after entering, the insulation material will be soaked in water for a long time, which will also cause the softening of the insulation material, accompanied by more serious hazards such as reduced bearing capacity and uneven settlement.
[0005] Therefore, this conventional insulation foundation structure is not suitable for areas with abundant groundwater or rainwater. Utility Model Content
[0006] The purpose of the utility model is to overcome the problems of the prior art and disclose a waterproof high-temperature molten salt storage tank insulation foundation. The utility model raises the foundation as a whole, and the insulation foundation as a whole is raised above the ground, solving the problem of groundwater and ground rainwater soaking the insulation material from the source. By setting a series of waterproof structural measures such as rainproof cover plates, water retaining edges, and drainage ditches, rainwater is further prevented from entering the insulation layer, minimizing the risk of insulation material failure. The high-temperature storage tank foundation is not only suitable for northern areas with little rain, but also for areas with abundant groundwater or rainwater.
[0007] The purpose of the utility model is achieved through the following technical solutions:
[0008] A waterproof high-temperature molten salt storage tank insulation foundation, the high-temperature molten salt storage tank insulation foundation comprising: a ring wall, a tank wall bottom ring beam, a flexible layer, a semi-rigid layer, a rigid isolation layer, an insulation layer, a ventilation layer and a bearing foundation;
[0009] The load-bearing foundation is arranged in the soil structure, and the top surface of the load-bearing foundation is flush with the ground;
[0010] The ventilation layer is arranged on the top side of the bearing foundation, the insulation layer is arranged on the top side of the ventilation layer, the rigid isolation layer is arranged on the top side of the insulation layer, the semi-rigid layer is arranged on the top side of the rigid isolation layer, and the flexible layer is arranged on the top side of the semi-rigid layer;
[0011] The high-temperature molten salt storage tank is arranged on the top side of the flexible layer, and the flexible layer is provided with a corresponding slope structure based on the slope of the tank bottom plate;
[0012] The tank wall bottom ring beam is arranged on the top side of the rigid isolation layer, the outer edge of the tank body of the high-temperature molten salt storage tank is arranged on the top side of the tank wall bottom ring beam, and the flexible layer and the semi-rigid layer are arranged on the inner side of the tank wall bottom ring beam;
[0013] The annular wall is an annular structure, located on the top side of the ventilation layer, and arranged on the outside of the tank wall bottom ring beam, the rigid isolation layer, and the thermal insulation layer.
[0014] According to a preferred embodiment, a waterproof cover plate is provided on the circumference of the bottom outer edge of the high-temperature molten salt storage tank, and the waterproof cover plate completes the coverage from the bottom ring beam of the tank wall to the top of the ring wall, and an annular drainage ditch is provided on the circumference of the outer edge of the ventilation layer, and the outer edge of the waterproof cover plate extends to the top side of the trough body of the drainage ditch.
[0015] According to a preferred embodiment, a water retaining edge is provided on the outer edge of the drainage ditch, and the drainage ditch is connected to the leakage well through a side drainage pipe.
[0016] According to a preferred embodiment, the annular wall is a steel plate structural ring body, and the space between the annular wall and the tank wall bottom ring beam is filled with thermal insulation material.
[0017] According to a preferred embodiment, an outer protective plate with an annular structure is provided on the outer side of the annular wall, and a heat-insulating material is filled between the outer protective plate and the annular wall.
[0018] According to a preferred embodiment, a leakage-proof steel plate is provided between the rigid isolation layer and the semi-rigid layer, a liquid collecting trough is provided on the circumference of the outer edge of the rigid isolation layer, the outer edge of the leakage-proof steel plate extends to the entrance of the trough body of the liquid collecting trough, and a reverse filtration device is also provided in the liquid collecting trough.
[0019] According to a preferred embodiment, the top surface slope of the rigid isolation layer is 0.3% to 1.5%.
[0020] According to a preferred embodiment, the reverse filtration device is paved with pebbles or crushed stones with a particle size of 20 to 40 mm.
[0021] According to a preferred embodiment, a bottom drain pipe is provided on the side of the liquid collecting tank and is connected to the leakage well.
[0022] According to a preferred embodiment, a plurality of ventilation pipes are horizontally arranged in the ventilation layer, and buried pipes for temperature measurement points are arranged in the ventilation layer.
[0023] The above-mentioned main scheme of the utility model and its further optional schemes can be freely combined to form multiple schemes, all of which are schemes that can be adopted and claimed for protection by the utility model. After understanding the scheme of the utility model, those skilled in the art can understand that there are many combinations based on the existing technology and common knowledge, all of which are technical schemes to be protected by the utility model, and they are not exhaustively listed here.
[0024] Beneficial effects of the utility model:
[0025] The utility model adjusts the foundation layout, raises the foundation as a whole, brings the top surface of the load-bearing foundation close to the ground, and raises the insulation foundation as a whole above the ground, thereby solving the problem of groundwater and surface rainwater soaking the insulation material from the source and reducing the excavation depth by about 1 to 2 meters.
[0026] The ventilation layer is made of dense concrete, which can effectively prevent underground capillary water from rising to the insulation layer, thus protecting the performance of the insulation material from being affected.
[0027] Structural measures such as a rainproof cover plate, a water retaining edge, two drainage pipes, and a drainage ditch adapted to the present invention are provided to prevent rainwater and possible leaked molten salt from entering the insulation layer from various details, thereby minimizing the risk of insulation material failure.
[0028] Setting up a semi-rigid layer can make the stiffness of the tank bottom material more evenly transitioned, which can better balance the uneven load on the tank bottom and transfer it to the underlying foundation.
[0029] A rigid layer and an anti-leakage steel plate are set as an isolation layer, and a certain slope, a liquid collecting trough and a discharge pipe are set to effectively isolate the molten salt leaking from the bottom of the tank and discharge it in time.
[0030] The buried pipes of temperature measuring points can pass directly through the side of the insulation foundation in a straight line and are all above the ground, which is convenient for maintenance and replacement.
[0031] Through a series of innovations, the high-temperature storage tank foundation is not only suitable for northern regions, but also for areas with abundant groundwater or rainwater, ensuring the safe and efficient operation of high-temperature medium storage tanks. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is the existing conventional insulation basic structure;
[0033] Figure 2 It is a structural schematic diagram of the insulation foundation of the high-temperature molten salt storage tank of the utility model;
[0034] Among them, 1-annular wall, 2-tank wall bottom ring beam, 3-flexible layer, 4-semi-rigid layer, 5-rigid isolation layer, 6-insulation layer, 7-ventilation pipe, 8-ventilation layer, 9-load-bearing foundation, 10-outer guard plate, 11-waterproof cover plate, 12-water retaining edge, 13-drainage ditch, 14-anti-leakage steel plate, 15-liquid collecting tank, 16-anti-filtration device, 17-bottom drainage pipe, 18-side drainage pipe, 19-leakage well, 20-spread water, 21-temperature measuring point buried pipe. DETAILED DESCRIPTION
[0035] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.
[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0037] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0038] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0040] In addition, the present utility model should point out that, in the present utility model, if the specific structure, connection relationship, position relationship, power source relationship, etc. are not specifically written out, the structure, connection relationship, position relationship, power source relationship, etc. involved in the present utility model are all known by technical personnel in this field on the basis of existing technology without creative work.
[0041] refer to Figure 2 As shown in the figure, a waterproof high-temperature molten salt storage tank insulation foundation is shown, and the high-temperature molten salt storage tank insulation foundation includes: an annular wall 1, a tank wall bottom ring beam 2, a flexible layer 3, a semi-rigid layer 4, a rigid isolation layer 5, an insulation layer 6, a ventilation layer 8, a load-bearing foundation 9, an outer protective plate 10, a waterproof cover plate 11, a water retaining plate 12, a drainage ditch 13, an anti-leakage steel plate 14, a liquid collecting tank 15, a reverse filtration device 16, a bottom drainage pipe 17, a side drainage pipe 18, a leakage well 19, a water dispersion 20, and a temperature measuring point buried pipe 21.
[0042] Among them, the ring wall 1 is arranged around the ring, and can be welded with 20-50mm steel plates. It is isolated from the tank body and the ring beam of the tank wall bottom plate by the tank body insulation material to reduce the temperature of the steel plate and the heat dissipation loss. The bottom of the steel plate is not fixed and can slide freely after thermal expansion to reduce temperature stress. The outside is covered by the outer guard plate 10, and insulation materials can be arranged between them according to actual needs.
[0043] The tank wall bottom ring beam 2 is arranged along the circumference of the tank wall bottom, with a thickness of 300-500mm and a width of 500-1000mm. Thick heat-resistant concrete or refractory bricks can be used to improve the local stiffness of the tank wall bottom foundation, more evenly spread the tank wall load, and reduce uneven settlement.
[0044] The flexible layer 3 is made of graded sand with a minimum thickness of about 50 to 150 mm. The slope is adjusted according to the slope requirements of the tank bottom plate and can adapt to the deformation of the tank bottom.
[0045] The semi-rigid layer 4 may be made of coarse sand or graded gravel with a thickness of 150 to 450 mm, which can evenly transfer the tank bottom load and accommodate certain deformation.
[0046] The rigid isolation layer 5 is paved with rigid materials such as refractory bricks, with a thickness of 50 to 200 mm, which further evenly transfers the tank bottom load to the insulation layer 6 and prevents the sand and gravel of the 4-semi-rigid layer from leaking into the insulation layer 6.
[0047] The top surface of the rigid isolation layer 5 is sloped 0.3% to 1.5%, and a leakage-proof steel plate 14 is laid with a thickness of 2 to 5 mm, and a liquid collecting tank 15 and a filter device 16 are arranged around it. The liquid collecting tank 15 is formed by masonry of the rigid isolation layer 5 material, and the filter device 16 can be paved with pebbles or crushed stones with a particle size of 20 to 40 mm.
[0048] The side of the collecting tank 15 is connected to the bottom discharge pipe 17, which can be a φ30-100mm steel pipe with a filter screen, which is set every 3-15m and connected to the leakage well 19 to facilitate the timely discharge of the leaked molten salt. The anti-leakage steel plate and the salt discharge pipe form a dense support layer, evenly distribute the tank bottom pressure and isolate the molten salt that may leak from the bottom of the storage tank from entering the insulation layer 6 to avoid damage to the insulation material.
[0049] The insulation layer 6 is laid in layers using insulation materials such as calcium silicate board, foam glass, and expanded clay. Its thickness is 300 to 2000 mm, which is determined after calculation based on the actual project tank temperature and material properties.
[0050] The ventilation layer 8 is located between the insulation layer 6 and the bearing foundation 9. It is paved with ordinary concrete or heat-resistant concrete with a thickness of 300-600mm. It can effectively isolate the capillary water in the foundation from rising to the insulation layer 6, dissipate heat through the ventilation pipe 7 and the side of the ventilation layer, prevent heat accumulation and protect the bearing foundation. 21-temperature measuring point buried pipe is set inside.
[0051] The ventilation pipe 7 can be made of galvanized steel pipe or stainless steel pipe with a diameter of DN80~250.
[0052] The waterproof cover plate 11 is arranged along the circumference of the tank bottom, with a width covering 1-ring wall. It can be welded to the side of the tank bottom plate with a 2-5 mm steel plate. Molten salt leaking from the side of the tank or rainwater that may leak from the tank insulation can flow into the drainage ditch 13 through the waterproof cover plate to prevent it from entering the insulation foundation.
[0053] The drainage ditch 13 has a width of 100 to 300 mm and a depth of 50 to 200 mm. A water retaining edge 12 is set on the outer edge with a height of 50 to 200 mm and a width of 60 to 200 mm. It can be cast with ordinary concrete or heat-resistant concrete to block ground water accumulation and facilitate the fixation of the outer protective plate 10. At the same time, it forms a drainage ditch 13 with the concrete of the ventilation layer 8 and discharges to the leakage well 19 through the side drainage pipe 18.
[0054] The leakage well 19 can be made of steel or concrete structure with a diameter of 500 to 1000 mm and a manhole cover on the top. By setting temperature measuring points or manual inspections, molten salt leakage can be discovered in time, and measures can be taken as soon as possible to minimize hazards and losses.
[0055] Splash 20, with a width of 1 to 3 meters, can be made of concrete splash, cement surface splash, brick paved splash, etc., and set up a circle around the foundation to prevent ground rainwater from gathering on the insulation foundation.
[0056] The buried pipe 21 of the temperature measuring point is made of a stainless steel pipe or a galvanized steel pipe with a diameter of 10 to 50 mm, which passes through in a straight line. In addition to being set in the ventilation layer, it can be set in the insulation layer 6 as needed, which is convenient for installing and maintaining the temperature measuring point and monitoring the basic temperature conditions.
[0057] The utility model adjusts the foundation layout, raises the foundation as a whole, brings the top surface of the load-bearing foundation close to the ground, and raises the insulation foundation as a whole above the ground, thereby solving the problem of groundwater and surface rainwater soaking the insulation material from the source and reducing the excavation depth by about 1 to 2 meters.
[0058] The ventilation layer is made of dense concrete, which can effectively prevent underground capillary water from rising to the insulation layer, thus protecting the performance of the insulation material from being affected.
[0059] Structural measures such as a rainproof cover plate, a water retaining edge, two drainage pipes, and a drainage ditch adapted to the present invention are provided to prevent rainwater and possible leaked molten salt from entering the insulation layer from various details, thereby minimizing the risk of insulation material failure.
[0060] Setting up a semi-rigid layer can make the stiffness of the tank bottom material more evenly transitioned, which can better balance the uneven load on the tank bottom and transfer it to the underlying foundation.
[0061] A rigid layer and an anti-leakage steel plate are set as an isolation layer, and a certain slope, a liquid collecting trough and a discharge pipe are set to effectively isolate the molten salt leaking from the bottom of the tank and discharge it in time.
[0062] The buried pipes of temperature measuring points can pass directly through the side of the insulation foundation in a straight line and are all above the ground, which is convenient for maintenance and replacement.
[0063] Through a series of innovations, the high-temperature storage tank foundation is not only suitable for northern regions, but also for areas with abundant groundwater or rainwater, ensuring the safe and efficient operation of high-temperature medium storage tanks.
[0064] Example
[0065] Taking the insulation foundation of a high-temperature molten salt storage tank as an example, the tank diameter is 15m, the medium temperature is 560℃, and the groundwater is -1m.
[0066] First, construct the bearing foundation 9 with a burial depth of about -1m, excavate, cut the pile heads, pour the cushion layer, tie the pedestal reinforcement, support the formwork, and pour the pedestal concrete.
[0067] During the maintenance of the foundation, the ventilation pipe 7 and the buried pipe 21 for temperature measurement points can be manufactured and installed at the same time. The ventilation pipe 7 adopts a 6mm thick DN150 galvanized steel pipe, and the buried pipe 21 for temperature measurement points adopts a DN30 galvanized steel pipe. After the foundation is qualified, the ventilation layer 8 concrete is poured, using C30 heat-resistant concrete with a thickness of 600mm. The top surface is sloped and leveled around, and the surrounding water retaining edge 12 and drainage ditch 13 are formed at the same time, and the bottom drainage pipe 17 is pre-buried.
[0068] During the maintenance of the ventilation layer, the ring wall 1 can be made and installed, using a 50mm thick Q355B steel plate. After the ventilation layer is accepted, the insulation layer 6 is laid layer by layer, with a thickness of 700mm.
[0069] Then lay the rigid isolation layer 5 refractory bricks, two layers of staggered arrangement, leave a 120mm wide and 65mm deep 1 liquid collecting trough 15 around, and pre-bury the bottom drainage pipe 17. On the rigid isolation layer 5, lay the anti-leakage steel plate 14 welded with 3mm thick steel plate.
[0070] Set up the tank wall bottom ring beam formwork and divide the seams, cast the tank wall bottom ring beam 2, with a cross-sectional size of 600×300, using C30 heat-resistant concrete. After reaching the required strength, remove the formwork and fill the space between it and the 1-ring wall with tank insulation material.
[0071] A 200mm thick graded sand and gravel is laid on the inner side of the tank wall bottom ring beam 2 as a semi-rigid layer 4, and a flexible layer 3 is laid after compaction. The top surface slope is consistent with the tank bottom, and medium-coarse sand with a thickness of 100mm is used at the thinnest part.
[0072] When installing the tank bottom plate, the waterproof cover plate 11 is welded along the circumference of the tank bottom, and the slope is appropriately adjusted to about 5% toward the outside. Certain construction measures are taken between the unwelded bottom plates to form an integral cover plate on the top surface of the foundation.
[0073] After the tank body is completed, during the thermal insulation installation, the outer guard plate is covered to the water retaining edge 12, and about 100mm thick glass wool is filled between the ring wall 1 and the outer guard plate 10 as thermal insulation material. Finally, all the basic work is completed.
[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A waterproof high-temperature molten salt storage tank insulation foundation, characterized in that: The thermal insulation foundation of the high-temperature molten salt storage tank comprises: a ring wall (1), a ring beam at the bottom of the tank wall (2), a flexible layer (3), a semi-rigid layer (4), a rigid isolation layer (5), a thermal insulation layer (6), a ventilation layer (8) and a bearing foundation (9); The load-bearing foundation (9) is arranged in the soil structure, and the top surface of the load-bearing foundation (9) is flush with the ground; The ventilation layer (8) is arranged on the top side of the bearing foundation (9), the thermal insulation layer (6) is arranged on the top side of the ventilation layer (8), the rigid isolation layer (5) is arranged on the top side of the thermal insulation layer (6), the semi-rigid layer (4) is arranged on the top side of the rigid isolation layer (5), and the flexible layer (3) is arranged on the top side of the semi-rigid layer (4); The high-temperature molten salt storage tank is arranged on the top side of the flexible layer (3), and the flexible layer (3) is provided with a corresponding slope structure based on the slope of the tank bottom plate; The tank wall bottom ring beam (2) is arranged on the top side of the rigid isolation layer (5), the outer edge of the tank body of the high-temperature molten salt storage tank is arranged on the top side of the tank wall bottom ring beam (2), and the flexible layer (3) and the semi-rigid layer (4) are arranged on the inner side of the tank wall bottom ring beam (2); The annular wall (1) is an annular structure, located on the top side of the ventilation layer (8), and arranged on the outside of the tank wall bottom ring beam (2), the rigid isolation layer (5), and the thermal insulation layer (6).
2. The high-temperature molten salt storage tank insulation foundation according to claim 1, characterized in that: A waterproof cover plate (11) is provided on the circumference of the bottom outer edge of the high-temperature molten salt storage tank, and the waterproof cover plate (11) completes the coverage from the tank wall bottom ring beam (2) to the top of the ring wall (1). A circular drainage groove (13) is provided around the outer edge of the ventilation layer (8), and the outer edge of the waterproof cover plate (11) is extended to the top side of the groove body of the drainage groove (13).
3. The high-temperature molten salt storage tank insulation foundation according to claim 2, characterized in that: The outer edge of the drainage ditch (13) is provided with a water retaining edge (12), and is connected to the leakage well (19) through a side leakage pipe (18).
4. The high-temperature molten salt storage tank insulation foundation according to claim 1, characterized in that: The annular wall (1) is a steel plate structural ring body, and a heat-insulating material is filled between the annular wall (1) and the tank wall bottom ring beam (2).
5. The high-temperature molten salt storage tank insulation foundation according to claim 1, characterized in that: An outer protective plate (10) with an annular structure is arranged outside the annular wall (1), and a heat-insulating material is filled between the outer protective plate (10) and the annular wall (1).
6. The high-temperature molten salt storage tank insulation foundation according to claim 1, characterized in that: An anti-leakage steel plate (14) is provided between the rigid isolation layer (5) and the semi-rigid layer (4). A liquid collecting trough (15) is provided on the circumference of the outer edge of the rigid isolation layer (5), the outer edge of the plate body of the anti-leakage steel plate (14) is extended to the inlet of the trough body of the liquid collecting trough (15), and a reverse filtering device (16) is also provided in the liquid collecting trough (15).
7. The high-temperature molten salt storage tank insulation foundation according to claim 6, characterized in that: The top surface of the rigid isolation layer (5) has a slope of 0.3% to 1.5%.
8. The high-temperature molten salt storage tank insulation foundation according to claim 6, characterized in that: The reverse filter device (16) is paved with pebbles or crushed stones with a particle size of 20 to 40 mm.
9. The high-temperature molten salt storage tank insulation foundation according to claim 6, characterized in that: A bottom drain pipe (17) is provided on the side of the liquid collecting tank (15) and is connected to the leakage well (19).
10. The high-temperature molten salt storage tank insulation foundation according to claim 1, characterized in that: A plurality of ventilation pipes (7) are horizontally arranged in the ventilation layer (8), and a temperature measuring point buried pipe (21) is arranged in the ventilation layer (8).