High-temperature molten salt storage tank foundation structure and construction method

Abstract

The present invention provides a high-temperature molten salt storage tank foundation structure and a construction method, including pile foundations. A reinforced concrete layer is cast on the pile foundations. A ventilation pipe is fixedly arranged inside the reinforcing pipe sleeve. A gravel layer and a ceramsite layer are sequentially arranged from bottom to top in the gap between the longitudinal refractory brick layers. A transverse refractory brick layer is arranged at the top of the longitudinal refractory brick layer and the ceramsite layer. A molten salt storage tank bottom plate is arranged at the top of the transverse refractory brick layer. One end of the ventilation pipe is provided with a gas guiding member, and a first joint, a second joint and a third joint are respectively communicated and arranged at the bottom of the gas guiding member. The present invention provides a high-temperature molten salt storage tank foundation structure and a construction method, with stable structure. Multiple support structures are arranged for the ventilation pipe itself and its interior, making the ventilation pipe not easily deformed. Moreover, the ventilation and cooling structure is improved, making the heat dissipation more uniform and avoiding the problem of uneven settlement caused by local overheating.

Description

Technical Field

[0001] The present invention relates to the technical field of molten salt storage tanks, and specifically to a high-temperature molten salt storage tank foundation structure and construction method. Background Art

[0002] The thermal energy storage system is an essential part of a solar thermal power station. Generally, molten salt is used as the medium to store solar energy in the form of heat energy, and the stored energy is relied on to maintain the normal operation of the system during morning, evening, or cloudy intervals. During the operation and shutdown of the power station, the molten salt temperature in the high- and low-temperature molten salt tanks must be kept above the freezing point and always in a molten state. Moreover, in order to extend the power generation time or increase the power generation capacity of the power station, the amount of molten salt used in a solar thermal power station generally reaches the ten-thousand-ton level, and the volume and weight of the storage tank body are very large. At the same time, in order to improve the steam quality and the operation efficiency of the backend generator set, the temperature of the medium in the storage tank is required to be relatively high and must be stable. For example, the molten salt temperature in the high-temperature tank must be kept at least at 400°C, and in some cases, it can reach 580°C, while the molten salt temperature in the low-temperature tank must be kept at about 290°C.

[0003] In the prior art, a foundation structure of a high-temperature molten salt storage tank with the publication number of "CN111648395A" includes a heat-insulating tank body and a heat-insulating tank bottom arranged at the inner bottom of the heat-insulating tank. The heat-insulating tank bottom is placed on a concrete layer, and ventilation pipes are buried inside the concrete layer. The ventilation pipes are connected to the outside air. It is characterized in that the heat-insulating tank bottom includes a basic heat-insulating layer, a leak-proof steel plate, and a sand cushion layer, which are arranged in sequence from bottom to top. The foundation structure of this high-temperature molten salt storage tank has a low construction cost. The tank body adopts a ring-shaped steel plate structure. Compared with the concrete ring wall structure, when the force meets the engineering requirements, the engineering cost can be effectively reduced, the construction is facilitated, and the construction period is greatly shortened.

[0004] However, in the process of its use, there are still relatively obvious defects: 1. A large number of ventilation pipes are arranged in the above-mentioned foundation structure. The ventilation pipes are used to increase air flow to take away the heat transferred from the molten salt storage tank to the molten salt storage tank foundation. However, leaving too many ventilation pipes in the molten salt storage tank foundation will damage the integrity of the entire foundation, and there are problems such as low bearing capacity of the molten salt storage tank foundation; 2. In the above-mentioned foundation structure, when cooling air flow is introduced into the ventilation pipes, the gas temperature at the outlet end is often higher than that at the inlet end, and the temperature distribution after cooling at different positions of the reinforced concrete layer is uneven, resulting in uneven settlement of the molten salt storage tank foundation due to the change of the foundation material structure caused by local overheating. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-temperature molten salt storage tank foundation structure and construction method to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A high-temperature molten salt storage tank foundation structure includes pile foundations. A reinforced concrete layer is cast on the pile foundations. A reinforcement pipe sleeve is embedded in the reinforced concrete layer. A ventilation pipe is fixedly arranged inside the reinforcement pipe sleeve. A circular steel plate is arranged on the reinforced concrete layer. A refractory cement ring is arranged in the inner circle of the circular steel plate. Multiple groups of longitudinal refractory brick layers are arranged at intervals in the inner circle surrounded by the refractory cement ring. A gravel layer and a ceramsite layer are sequentially arranged from bottom to top in the gaps between the longitudinal refractory brick layers. A transverse refractory brick layer is arranged at the top of the longitudinal refractory brick layer and the ceramsite layer. A molten salt storage tank bottom plate is arranged at the top of the transverse refractory brick layer;

[0008] One end of the ventilation pipe is provided with a gas guiding member. The bottom of the gas guiding member is respectively communicated with a first joint, a second joint and a third joint. A first cooling pipe is communicated with the first joint. A second cooling pipe is communicated with the third joint. A plurality of heat transfer plates are penetrated through the reinforced concrete layer and the reinforcement pipe sleeve, and the bottom ends of the heat transfer plates extend into the ventilation pipe. The arrangement spacing of the plurality of heat transfer plates gradually decreases from the direction close to the gas guiding member to the direction far from the gas guiding member. A first flow disturbing frame, a second flow disturbing frame and a support plate are sequentially fixedly arranged in the ventilation pipe from the direction close to the gas guiding member to the direction far from the gas guiding member. A first circular plate is arranged inside the first flow disturbing frame. A plurality of first flow disturbing holes are opened on the first circular plate. A support ring for positioning the second cooling pipe is embedded on the first circular plate. A second circular plate is arranged inside the second flow disturbing frame. A plurality of second flow disturbing holes are opened on the second circular plate. A cross-shaped support member is fixedly arranged in the support plate.

[0009] Preferably, the thickness of the reinforcement pipe sleeve gradually increases from the direction close to the gas guiding member to the direction far from the gas guiding member.

[0010] Preferably, one end of the ventilation pipe close to the gas guiding member is provided with a telescopic hose section.

[0011] Preferably, an outer limiting plate is arranged on the outer sides of the reinforced concrete layer, the water isolation layer and the circular steel plate. An elastic ring is opened on the outer limiting plate, and the ventilation pipe is arranged in the elastic ring.

[0012] Preferably, an upper positioning plate is fixedly arranged on the inner top of the ventilation pipe. An upper positioning ring is embedded in the upper positioning plate, and the first cooling pipe penetrates through the upper positioning ring.

[0013] Preferably, a lower positioning plate is fixedly arranged on the inner bottom of the ventilation pipe. A lower positioning ring is embedded in the lower positioning plate, and the second cooling pipe penetrates through the lower positioning ring.

[0014] Preferably, grooves are formed in the cross-shaped support member, isolation nets are fixedly arranged on the outer sides of the grooves, and moisture-absorbing particles are arranged in the area surrounded by the isolation nets.

[0015] A construction method for the foundation structure of the high-temperature molten salt storage tank includes the following steps:

[0016] Step 1: After excavating the pit, pile driving and positioning of the pile foundation are carried out on the compacted foundation.

[0017] Step 2: Pour to form a reinforced concrete layer, which is formed by concrete with a strength grade above C30. After pouring to a thickness of 150 - 300 cm, a reinforcement pipe sleeve is sleeved on the outer side of the ventilation pipe, and then the ventilation pipe is placed on the reinforced concrete layer, and then continue to pour concrete with a thickness of 80 - 180 cm.

[0018] Step 3: A water isolation layer is arranged on the top of the reinforced concrete layer.

[0019] Step 4: An annular steel plate is arranged above the water isolation layer, and a refractory cement ring is poured and arranged in the inner circle of the annular steel plate.

[0020] Step 5: Multiple groups of longitudinal refractory brick layers are arranged at intervals in the inner circle surrounded by the refractory cement ring, and a gravel layer and a ceramsite layer are sequentially arranged from bottom to top in the gaps between the longitudinal refractory brick layers.

[0021] Step 6: A transverse refractory brick layer is arranged on the top of the longitudinal refractory brick layer and the ceramsite layer.

[0022] Step 7: A molten salt storage tank bottom plate is arranged on the top of the transverse refractory brick layer.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. In the present invention, a reinforcement pipe sleeve is sleeved on the outer side of the ventilation pipe, an annular steel plate is arranged on the reinforced concrete layer, a refractory cement ring is arranged in the inner circle of the annular steel plate, multiple groups of longitudinal refractory brick layers are arranged at intervals in the inner circle surrounded by the refractory cement ring, a gravel layer and a ceramsite layer are sequentially arranged from bottom to top in the gaps between the longitudinal refractory brick layers, a transverse refractory brick layer is arranged on the top of the longitudinal refractory brick layer and the ceramsite layer, and a molten salt storage tank bottom plate is arranged on the top of the transverse refractory brick layer. Thus, each structure fits with each other, and obvious uneven structural changes can be avoided during the switching between high temperature and low temperature.

[0025] 2. At the bottom of the air guide part of the present invention, a first connector, a second connector and a third connector are respectively connected and arranged. A first cooling pipe is connected to the first connector, and a second cooling pipe is connected to the third connector. Among them, the outlet end of the first cooling pipe is close to the middle section of the foundation structure, and the outlet end of the second cooling pipe is close to the rear section of the foundation structure. Therefore, the problem of uneven temperature distribution inside the foundation can be avoided, and then more uniform cooling treatment can be realized for the foundation structure, avoiding uneven settlement caused by the change of the foundation material structure due to local overheating;

[0026] 3. Inside the ventilation pipe of the present invention, a first flow disturbance frame, a second flow disturbance frame and a support plate are sequentially fixedly arranged from the direction close to the air guide part to the direction far from the air guide part. Therefore, different positions of the ventilation pipe can be stably supported, avoiding deformation due to bearing pressure and temperature change, making the ventilation pipe more stable and durable.

[0027] The present invention provides a high-temperature molten salt storage tank foundation structure and a construction method. The structure is stable. Multiple support structures are arranged for the ventilation pipe itself and its interior, making the ventilation pipe not easily deformed. And the ventilation and cooling structure is improved, making the heat dissipation more uniform, avoiding the problem of uneven settlement caused by local overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a front sectional view schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is of the present invention Figure 1 an enlarged view of part A in;

[0030] Figure 3 is of the present invention Figure 1 an enlarged view of part B in;

[0031] Figure 4 is a front view structure schematic diagram of the upper positioning plate of the present invention;

[0032] Figure 5 is a front view structure schematic diagram of the lower positioning plate of the present invention;

[0033] Figure 6 is a front view structure schematic diagram of the first flow disturbance frame of the present invention;

[0034] Figure 7 is a front view structure schematic diagram of the second flow disturbance frame of the present invention;

[0035] Figure 8 is a front view structure schematic diagram of the support plate of the present invention;

[0036] Figure 9 is a sectional view schematic diagram of the support plate of the present invention.

[0037] In the figure: 1 pile foundation, 2 reinforced concrete layer, 3 reinforcement pipe sleeve, 4 ventilation pipe, 401 telescopic hose section, 5 water isolation layer, 6 annular steel plate, 7 refractory cement ring, 801 longitudinal refractory brick layer, 802 transverse refractory brick layer, 9 gravel layer, 10 ceramsite layer, 11 molten salt storage tank bottom plate, 12 outer limit plate, 13 elastic ring, 14 heat transfer plate, 15 air guide part, 151 first joint, 152 second joint, 153 third joint, 16 first cooling pipe, 17 second cooling pipe, 18 upper positioning plate, 19 upper positioning ring, 20 lower positioning plate, 21 lower positioning ring, 22 first flow disturbance frame, 23 first circular plate, 231 first flow disturbance hole, 24 support ring, 25 second flow disturbance frame, 26 second circular plate, 261 second flow disturbance hole, 27 support plate, 28 cross-shaped support member, 281 groove, 282 isolation net, 283 moisture absorption particles. Specific implementation manner

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Please refer to Figures 1 to 9 , the present invention provides a technical solution:

[0040] Embodiment 1:

[0041] A high-temperature molten salt storage tank foundation structure includes a pile foundation 1. A reinforced concrete layer 2 is cast on the pile foundation 1. A reinforcement pipe sleeve 3 is embedded in the reinforced concrete layer 2. A ventilation pipe 4 is fixedly arranged inside the reinforcement pipe sleeve 3. The setting of the reinforcement pipe sleeve 3 can improve the stability of the ventilation pipe 4 itself, making the ventilation pipe 4 not easily deformed and the structure more stable. An annular steel plate 6 is arranged on the reinforced concrete layer 2. The annular steel plate 6 plays a role in fixing and limiting the overall framework. A refractory cement ring 7 is arranged in the inner circle of the annular steel plate 6. Multiple groups of longitudinal refractory brick layers 801 are arranged at intervals in the inner circle surrounded by the refractory cement ring 7, which can resist the erosion and thermal expansion of high-temperature molten salt and ensure the durability and long life of the storage tank. A gravel layer 9 and a ceramsite layer 10 are sequentially arranged from bottom to top in the gaps between the longitudinal refractory brick layers 801. Both the gravel layer 9 and the ceramsite layer 10 have a buffering effect. A transverse refractory brick layer 802 is arranged at the top of the longitudinal refractory brick layer 801 and the ceramsite layer 10. A molten salt storage tank bottom plate 11 is arranged at the top of the transverse refractory brick layer 802.

[0042] One end of the ventilation pipe 4 is provided with a gas guiding member 15. The bottom of the gas guiding member 15 is respectively communicated with a first joint 151, a second joint 152 and a third joint 153. A first cooling pipe 16 is communicated with the first joint 151. The outlet end of the first cooling pipe 16 is close to the middle section of the reinforced concrete layer 2. A second cooling pipe 17 is communicated with the third joint 153. The outlet end of the second cooling pipe 17 is close to the rear section of the reinforced concrete layer 2, for example, at about three-quarters of the position. Both the first cooling pipe 16 and the second cooling pipe 17 are made of heat-insulating materials, which can be rock wool, glass wool, aluminum silicate felt, etc. These materials also have characteristics such as fire prevention and corrosion prevention, which can ensure the safety and durability of the ventilation pipe. The air flow blown out from the second joint 152 directly enters the interior of the ventilation pipe 4. Thus, the problem of uneven temperature distribution inside the foundation after heat dissipation can be avoided, and then more uniform cooling treatment can be realized for the foundation structure, avoiding uneven settlement caused by the change of the foundation material structure due to local overheating. A plurality of heat transfer plates 14 are arranged through the reinforced concrete layer 2 and the reinforcement pipe sleeve 3, and the bottom ends of the heat transfer plates 14 extend into the interior of the ventilation pipe 4. The setting distance of the plurality of heat transfer plates 14 gradually decreases from the direction close to the gas guiding member 15 to the direction far from the gas guiding member 15. This is because the heat dissipation performance of the end of the reinforced concrete layer 2 far from the gas guiding member 15 will decrease due to the increase in the temperature of the cooling gas. Therefore, the number of heat transfer plates 14 is gradually increased to increase the heat dissipation area and make the heat dissipation more uniform. Inside the ventilation pipe 4, a first flow disturbing frame 22, a second flow disturbing frame 25 and a support plate 27 are fixedly arranged in sequence from the direction close to the gas guiding member 15 to the direction far from the gas guiding member 15. A first circular plate 23 is arranged inside the first flow disturbing frame 22. A plurality of first flow disturbing holes 231 are formed in the first circular plate 23. The air flow needs to pass through the first flow disturbing holes 231 to achieve flow disturbance. A support ring 24 for positioning the second cooling pipe 17 is embedded in the first circular plate 23. The setting of the support ring 24 can improve the position stability of the second cooling pipe 17 at this place. A second circular plate 26 is arranged inside the second flow disturbing frame 25. A plurality of second flow disturbing holes 261 are formed in the second circular plate 26. A cross-shaped support member 28 is fixedly arranged in the support plate 27. The cross-shaped support member 28 can improve the structural stability of the support plate 27, and further make the ventilation pipe 4 not easily deformed.

[0043] Embodiment 2:

[0044] A high-temperature molten salt storage tank foundation structure includes a pile foundation 1. A reinforced concrete layer 2 is cast on the pile foundation 1. A reinforcement pipe sleeve 3 is embedded in the reinforced concrete layer 2. The thickness of the reinforcement pipe sleeve 3 gradually increases from the direction close to the air guide member 15 to the direction far from the air guide member 15. A ventilation pipe 4 is fixedly arranged inside the reinforcement pipe sleeve 3. The arrangement of the reinforcement pipe sleeve 3 can improve the stability of the ventilation pipe 4 itself, making the ventilation pipe 4 not easily deformed and the structure more stable. One end of the ventilation pipe 4 close to the air guide member 15 is provided with a telescopic hose section 401. The telescopic hose section 401 can undergo a certain amount of telescopic deformation and has a buffering effect, avoiding damage to the ventilation pipe 4 due to thermal expansion and contraction caused by temperature changes. A circular steel plate 6 is arranged on the reinforced concrete layer 2. The circular steel plate 6 plays a role in fixing and limiting the overall framework. A refractory cement ring 7 is arranged in the inner circle of the circular steel plate 6. Multiple groups of longitudinal refractory brick layers 801 are arranged at intervals in the inner circle surrounded by the refractory cement ring 7, which can resist the erosion and thermal expansion of high-temperature molten salt, ensuring the durability and long life of the storage tank. A gravel layer 9 and a ceramsite layer 10 are successively arranged from bottom to top in the gaps between the longitudinal refractory brick layers 801. Both the gravel layer 9 and the ceramsite layer 10 have a buffering effect. A transverse refractory brick layer 802 is arranged at the top of the longitudinal refractory brick layer 801 and the ceramsite layer 10. A molten salt storage tank bottom plate 11 is arranged at the top of the transverse refractory brick layer 802. An outer limiting plate 12 is arranged on the outer sides of the reinforced concrete layer 2, the water isolation layer 5, and the circular steel plate 6. The outer limiting plate 12 is used to limit the entire foundation structure. An elastic ring 13 is opened on the outer limiting plate 12, and the ventilation pipe 4 is arranged in the elastic ring 13. The elastic ring 13 can buffer the thermal expansion and contraction of the structure.

[0045] One end of the ventilation pipe 4 is provided with a gas guiding member 15. The bottom of the gas guiding member 15 is respectively communicated with a first joint 151, a second joint 152 and a third joint 153. A first cooling pipe 16 is communicated with the first joint 151. The outlet end of the first cooling pipe 16 is close to the middle section of the reinforced concrete layer 2. A second cooling pipe 17 is communicated with the third joint 153. The outlet end of the second cooling pipe 17 is close to the rear section of the reinforced concrete layer 2, for example, at about three-quarters of the position. The air flow blown out from the second joint 152 directly enters the interior of the ventilation pipe 4. Thus, the problem of uneven temperature distribution inside the foundation after heat dissipation can be avoided, and then more uniform cooling treatment can be realized for the foundation structure, avoiding uneven settlement caused by the change of the foundation material structure due to local overheating. A plurality of heat transfer plates 14 are arranged through the reinforced concrete layer 2 and the reinforcement pipe sleeve 3, and the bottom ends of the heat transfer plates 14 extend into the interior of the ventilation pipe 4. The arrangement spacing of the plurality of heat transfer plates 14 gradually decreases from the direction close to the gas guiding member 15 to the direction far from it. This is because the temperature of the end of the reinforced concrete layer 2 far from the gas guiding member 15 will decrease the heat dissipation performance due to the increase in the temperature of the cooling gas. Therefore, the number of heat transfer plates 14 is gradually increased to increase the heat dissipation area and make the heat dissipation more uniform. An upper positioning plate 18 is fixedly arranged on the inner top of the ventilation pipe 4. An upper positioning ring 19 is embedded in the upper positioning plate 18, and the first cooling pipe 16 is arranged through the upper positioning ring 19 to achieve stable positioning. A lower positioning plate 20 is fixedly arranged on the inner bottom of the ventilation pipe 4. A lower positioning ring 21 is embedded in the lower positioning plate 20, and the second cooling pipe 17 is arranged through the lower positioning ring 21 for fixation. A first flow disturbing frame 22, a second flow disturbing frame 25 and a support plate 27 are fixedly arranged in the ventilation pipe 4 in sequence from the direction close to the gas guiding member 15 to the direction far from it. A first circular plate 23 is arranged inside the first flow disturbing frame 22. A plurality of first flow disturbing holes 231 are formed in the first circular plate 23. The air flow needs to pass through the first flow disturbing holes 231 to achieve flow disturbance. A support ring 24 for positioning the second cooling pipe 17 is embedded in the first circular plate 23. The arrangement of the support ring 24 can improve the position stability of the second cooling pipe 17 here. A second circular plate 26 is arranged inside the second flow disturbing frame 25. A plurality of second flow disturbing holes 261 are formed in the second circular plate 26. A cross-shaped support member 28 is fixedly arranged in the support plate 27. The cross-shaped support member 28 can improve the structural stability of the support plate 27, and then make the ventilation pipe 4 not easily deformed.

[0046] Embodiment Three:

[0047] Based on the above-mentioned Embodiment 1 or Embodiment 2, the following structure is added in this embodiment: a groove 281 is formed on the cross-shaped support member 28, isolation nets 282 are fixedly arranged on the outer sides of the groove 281, moisture-absorbing particles 283 are arranged in the area surrounded by the isolation nets 282, and the mesh diameter of the isolation nets 282 is smaller than the diameter of the moisture-absorbing particles 283, thereby preventing the leakage of the moisture-absorbing particles 283. The arrangement of the moisture-absorbing particles 283 can absorb the moisture inside the ventilation pipe 4, keep its interior in a dry state, and make it more durable.

[0048] A construction method for the foundation structure of a high-temperature molten salt storage tank includes the following steps:

[0049] Step 1: After digging a pit, pile driving and positioning of the pile foundation 1 are carried out on the compacted foundation.

[0050] Step 2: Pour to form a reinforced concrete layer 2, which is formed by concrete with a strength grade above C30. After pouring to a thickness of 150 - 300 cm, the reinforcement pipe sleeve 3 is sleeved on the outside of the ventilation pipe 4, and then the ventilation pipe 4 is placed on the reinforced concrete layer 2, and then continue to pour concrete with a thickness of 80 - 180 cm. Thus, the ventilation pipe 4 is stably buried in the reinforced concrete layer 2.

[0051] Step 3: A water isolation layer 5 is arranged on the top of the reinforced concrete layer 2 to avoid water seepage problems.

[0052] Step 4: An annular steel plate 6 is arranged above the water isolation layer 5, and a refractory cement ring 7 is poured and set in the inner circle of the annular steel plate 6 to make it more firm.

[0053] Step 5: Multiple groups of longitudinal refractory brick layers 801 are arranged at intervals in the inner circle surrounded by the refractory cement ring 7, and a gravel layer 9 and a ceramsite layer 10 are sequentially arranged from bottom to top in the gaps between the longitudinal refractory brick layers 801. Both the gravel layer 9 and the ceramsite layer 10 have a certain buffering and filling effect.

[0054] Step 6: A transverse refractory brick layer 802 is arranged on the top of the longitudinal refractory brick layer 801 and the ceramsite layer 10.

[0055] Step 7: A molten salt storage tank bottom plate 11 is arranged on the top of the transverse refractory brick layer 802.

[0056] Working principle:

[0057] In use, the high-temperature molten salt storage tank is placed on top of the molten salt storage tank bottom plate 11. If the temperature of the reinforced concrete layer 2 is too high and needs to be cooled down, a cooling air flow can be introduced into the interior of the ventilation pipe 4. Specifically, a cooling air flow is introduced into the air guiding member 15. The bottom of the air guiding member 15 is respectively connected and provided with a first joint 151, a second joint 152 and a third joint 153. A first cooling pipe 16 is connected and provided on the first joint 151. The outlet end position of the first cooling pipe 16 is close to the middle section of the reinforced concrete layer 2. A second cooling pipe 17 is connected and provided on the third joint 153. The outlet end position of the second cooling pipe 17 is close to the rear section of the reinforced concrete layer 2, for example, at about three-quarters of the position. The air flow blown out from the second joint 152 directly enters the interior of the ventilation pipe 4. Thus, the problem of uneven temperature distribution inside the foundation can be avoided, and then a more uniform cooling treatment can be realized for the foundation structure, avoiding uneven settlement caused by changes in the structure of the foundation material due to local overheating;

[0058] The setting intervals of the plurality of heat transfer plates 14 gradually decrease in the direction from close to far from the air guiding member 15. Therefore, the heat dissipation area will gradually increase. An upper positioning plate 18 is fixedly provided at the inner top of the ventilation pipe 4, and a lower positioning plate 20 is fixedly provided at the inner bottom of the ventilation pipe 4, which can respectively assist in fixing the positions of the first cooling pipe 16 and the second cooling pipe 17. A first flow disturbance frame 22, a second flow disturbance frame 25 and a support plate 27 are sequentially fixedly provided inside the ventilation pipe 4 in the direction from close to far from the air guiding member 15. It can not only disturb the gas inside the ventilation pipe 4 to improve the heat dissipation effect, but also stably support the ventilation pipe 4 from the inside to avoid its deformation, making the overall foundation structure more stable and durable.

[0059] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A basic structure for a high-temperature molten salt storage tank, including a pile foundation, characterized in that: A reinforced concrete layer is cast on the pile foundation. A reinforcement pipe sleeve is embedded in the reinforced concrete layer. A ventilation pipe is fixedly arranged inside the reinforcement pipe sleeve. An annular steel plate is arranged on the reinforced concrete layer. A refractory cement ring is arranged in the inner circle of the annular steel plate. A plurality of longitudinal refractory brick layers are arranged at intervals in the middle of the inner circle surrounded by the refractory cement ring. A gravel layer and a ceramsite layer are sequentially arranged from bottom to top in the gaps between the longitudinal refractory brick layers. A transverse refractory brick layer is arranged at the top of the longitudinal refractory brick layer and the ceramsite layer. The top of the transverse refractory brick layer is provided with a molten salt storage tank bottom plate; One end of the ventilation pipe is provided with a gas guiding member. A first joint, a second joint and a third joint are respectively communicated and arranged at the bottom of the gas guiding member. A first cooling pipe is communicated and arranged on the first joint. A second cooling pipe is communicated and arranged on the third joint. A plurality of heat transfer plates are arranged through the reinforced concrete layer and the reinforcement pipe sleeve, and the bottom ends of the heat transfer plates extend into the ventilation pipe. The arrangement spacing of the plurality of heat transfer plates gradually decreases from the direction close to the gas guiding member to the direction far from the gas guiding member. A first flow disturbing frame, a second flow disturbing frame and a support plate are sequentially fixedly arranged inside the ventilation pipe from the direction close to the gas guiding member to the direction far from the gas guiding member. A first circular plate is arranged inside the first flow disturbing frame. A plurality of first flow disturbing holes are formed in the first circular plate. A support ring for positioning the second cooling pipe is embedded in the first circular plate. A second circular plate is arranged inside the second flow disturbing frame. A plurality of second flow disturbing holes are formed in the second circular plate. A cross-shaped support member is fixedly arranged in the support plate.

2. The basic structure of a high-temperature molten salt storage tank according to claim 1, wherein: The thickness of the reinforcement pipe sleeve gradually increases from the direction close to the gas guiding member to the direction far from the gas guiding member.

3. The basic structure of a high-temperature molten salt storage tank according to claim 1, characterized in that: One end of the ventilation pipe close to the gas guiding member is provided with a telescopic hose section.

4. A high-temperature molten salt storage tank foundation structure according to claim 1, characterized in that: An outer limiting plate is arranged on the outer sides of the reinforced concrete layer, the water isolation layer and the annular steel plate. An elastic ring is formed in the outer limiting plate, and the ventilation pipe is arranged in the elastic ring.

5. The basic structure of a high-temperature molten salt storage tank according to claim 1, characterized in that: An upper positioning plate is fixedly arranged at the inner top of the ventilation pipe. An upper positioning ring is embedded in the upper positioning plate, and the first cooling pipe is arranged through the upper positioning ring.

6. The basic structure of a high-temperature molten salt storage tank according to claim 1, characterized in that: A lower positioning plate is fixedly arranged at the inner bottom of the ventilation pipe. A lower positioning ring is embedded in the lower positioning plate, and the second cooling pipe is arranged through the lower positioning ring.

7. The basic structure of a high-temperature molten salt storage tank according to claim 1, characterized in that: Grooves are formed in the cross-shaped support member. Isolation nets are fixedly arranged on the outer sides of the grooves. Moisture absorption particles are arranged in the area surrounded by the isolation nets.

8. A construction method for the foundation structure of the high-temperature molten salt storage tank according to any one of claims 1 to 7, characterized in that, Including the following steps: Step 1: After digging a pit, perform pile driving positioning on the pile foundation on the compacted foundation; Step 2: Pour to form a reinforced concrete layer. The reinforced concrete layer is formed by concrete with a strength grade above C30. After pouring to a thickness of 150 - 300 cm, sleeved the reinforcement pipe sleeve on the outer side of the ventilation pipe, and then place the ventilation pipe on the reinforced concrete layer, and then continue to pour concrete with a thickness of 80 - 180 cm; Step 3: Arrange a water isolation layer on the top of the reinforced concrete layer; Step 4: Arrange an annular steel plate above the water isolation layer, and pour and arrange a refractory cement ring in the inner circle of the annular steel plate; Step Five: Arrange multiple groups of longitudinal refractory brick layers at intervals in the inner circle surrounded by the refractory cement ring, and successively arrange a gravel layer and a ceramsite layer from bottom to top in the gaps between the longitudinal refractory brick layers; Step Six: Set a transverse refractory brick layer on the top of the longitudinal refractory brick layer and the ceramsite layer; Step Seven: Set the bottom plate of the molten salt storage tank on the top of the transverse refractory brick layer.

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