Array type pipeline fused salt storage device

Abstract

The utility model provides an array type pipeline fused salt storage device which comprises a storage part, and a supporting part is arranged at the bottom of the storage part. The storage part comprises a first storage pipe and a second storage pipe, a plurality of third storage pipes arranged in an array mode are connected between the first storage pipe and the second storage pipe, and the third storage pipes communicate with the first storage pipe and the second storage pipe; an input pipe is connected to a port of one end of the first storage pipe, an output pipe is connected to a port of the other end of the first storage pipe, the supporting parts are arranged at the bottoms of the input pipe and the output pipe, and a fourth storage pipe is arranged at a port of the second storage pipe. According to the storage device, the storage space is formed by arranging the array type pipelines on the input pipe and the output pipe, a traditional overall storage tank is replaced, the number of welding seams is reduced, the fused salt leakage risk caused by welding defects is fundamentally reduced, the site construction period is shortened, and the nondestructive testing cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of molten salt energy storage technology, specifically to an array-type pipeline molten salt storage device. Background Technology

[0002] Molten salt thermal energy storage (TES) is a key technology for large-scale, long-term energy storage, especially in the field of concentrated solar power. Its core lies in using molten salt, i.e., a mixture of nitrates, to store a large amount of thermal energy at a high temperature of up to 565°C and release it when needed. However, in order to achieve the required huge energy storage, such as hundreds of megawatt-hours or even gigawatt-hours, it is necessary to build a huge storage tank system.

[0003] Currently, vertical cylindrical fixed-roof storage tanks are the mainstream choice in the industry. However, the design, construction, and operation and maintenance of these tanks face a series of severe challenges. Specifically, due to their enormous size, the main body of these tanks usually cannot be transported as a whole. Instead, the materials used to manufacture the tanks must be transported to the installation site. At the installation site, a large amount of on-site rolling, assembly, and welding of the materials is required. This involves welding the tank walls (usually multi-layered plates), tank bottom, roof (fixed or floating roof structure), and their accessories. However, due to the large size of these tanks, the construction and operation of these tanks face numerous challenges. The diameter of the tank can reach tens of meters, so the length of the circumferential and vertical welds of a single-layer tank wall is very long. The multi-layer wall panel structure further increases the total weld length. In addition, the bottom of the tank usually uses lap welds, which cover a huge area, making the total welding workload extremely large. The huge amount of welds means a huge workload and time investment in NDT. During the welding process, the welds must be 100% dense and free from defects such as cracks, porosity, slag inclusions, and lack of fusion. This requires high technical skills from the welders and extremely high skills and experience from the inspection personnel. It is difficult to manufacture and has high economic costs. Utility Model Content

[0004] To address the challenges of manufacturing vertical cylindrical fixed-top tanks in existing molten salt energy storage systems, which are characterized by high manufacturing difficulty and cost, this invention provides an array-type pipeline molten salt storage device.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model proposes an array-type pipeline molten salt storage device, including a storage section, and a support section is provided at the bottom of the storage section;

[0007] The storage unit includes a first storage tube and a second storage tube, and a plurality of third storage tubes arranged in an array are connected between the first storage tube and the second storage tube. The third storage tubes are respectively connected to the first storage tube and the second storage tube.

[0008] An input tube is connected to one end of the first storage tube, and an output tube is connected to the other end of the first storage tube. The support portion is provided at the bottom of the input tube and the output tube, and a fourth storage tube is provided at the port of the second storage tube.

[0009] Preferably, the first storage tube and the second storage tube correspond one-to-one and are parallel to each other;

[0010] The input tube and the output tube are parallel to each other, and the fourth storage tube is parallel to the input tube.

[0011] Preferably, a plurality of third storage tubes are provided at equal intervals between the first storage tube and the second storage tube, which correspond one-to-one, and the third storage tubes are respectively connected to the first storage tube and the second storage tube.

[0012] Preferably, both the first storage tube and the second storage tube are provided in multiple forms;

[0013] Multiple first storage tubes are arranged in parallel in a row between the input tube and the output tube, and each first storage tube is connected to both the input tube and the output tube.

[0014] Multiple second storage tubes are arranged in parallel in a row above the first storage tube, and the same side port of the multiple second storage tubes is connected to a fourth storage tube, and each second storage tube is connected to the fourth storage tube;

[0015] Multiple third storage tubes are arranged in an array, with the upper port of each third storage tube connected to the second storage tube and the lower port of each third storage tube connected to the first storage tube.

[0016] Preferably, the first storage tube, the second storage tube, the input tube, the output tube, and the fourth storage tube are all composed of multiple straight tubes and multiple tee connectors spliced ​​together at intervals, and the multiple straight tubes are coaxially connected, with a plug connected to the port of the straight tube at the end away from the tee connector.

[0017] Preferably, the diameter of the straight pipe and the third storage pipe is 300mm to 3000mm.

[0018] Preferably, the input pipe, the output pipe, and the fourth storage pipe are all covered with a heat insulation layer.

[0019] Preferably, the support includes a support block set on the ground, a pre-embedded block is provided on the top end face of the support block, a heat insulation layer with a thickness of 300mm~600mm is provided on the top end face of the pre-embedded block, a support frame is provided on the top end face of the heat insulation layer, an arc-shaped plate is provided on the top end face of the support frame, and the upper end of the arc-shaped plate is fixed to the input pipe or the output pipe.

[0020] Preferably, shut-off valves are installed at the inlet of the input pipe and at the outlet of the output pipe.

[0021] Preferably, a pressure detection component and a thermometer are installed on both the input tube and the output tube; the pressure detection component has a pressure measurement range of 0.1MPa to 2.5MPa; and the thermometer has a temperature measurement range of 100℃ to 600℃.

[0022] Compared with the prior art, the present invention has the following beneficial technical effects:

[0023] This invention proposes an array-type pipeline molten salt storage device. This storage device forms a storage space by setting up an array of pipelines in the input and output pipes, replacing the traditional integral storage tank. Through the grid-like connection of the first storage pipe, the second storage pipe and multiple third storage pipes, the amount of welding work is significantly reduced. Compared with the continuous welding process of traditional storage tanks, the array-type pipeline achieves modular assembly through prefabricated pipe fittings, reducing the number of welds and fundamentally reducing the risk of molten salt leakage caused by welding defects. It also shortens the on-site construction cycle and reduces the cost of non-destructive testing. At the same time, the array-type pipeline divides the heat storage space into multiple independent small-volume pipeline units, effectively dispersing the thermal stress generated by the operation of high-temperature molten salt, avoiding the thermal gradient concentration caused by the large volume of traditional storage tanks, and significantly improving the thermal shock resistance.

[0024] Furthermore, this storage device employs a first storage pipe, a second storage pipe, an input pipe, an output pipe, and a fourth storage pipe assembled using straight pipes and tee joints. This reduces the amount of on-site welding work, decreases the number of welds, reduces the risk of molten salt leakage caused by welding defects from the source, shortens the manufacturing cycle, and simplifies the maintenance process. The array-matrix arrangement of the third, first, and second storage pipes forms a uniformly distributed thermal storage network, which disperses the thermal stress of the high-temperature molten salt to multiple independent pipe units, reduces the thermal stress level, effectively suppresses deformation caused by concentrated thermal gradients, improves thermal shock resistance, and significantly enhances site adaptability.

[0025] Furthermore, the input pipe, the output pipe, and the fourth storage pipe in this storage device are all covered with an insulation layer. The insulation layer keeps the storage device warm, effectively reducing heat loss of the high-temperature molten salt during pipeline transportation and reducing the additional heating energy required to maintain the heat storage temperature.

[0026] Furthermore, in this storage device, the support unit provides a stable placement platform for the storage unit through the support pier, so that the storage unit can be stably placed in the required installation position. The support pier is provided with a heat insulation layer, which can reduce the heat energy carried by the lava stored in the storage unit from being transferred to the support pier, thus extending the service life of the support pier. The upper end of the heat insulation layer is connected to a support frame, which further reduces the heat energy transferred from the storage unit to the support pier, further protecting the support pier, so that the support pier provides a stable support platform for the storage unit. Attached Figure Description

[0027] Figure 1 This is one of the structural schematic diagrams of an array-type pipeline molten salt storage device proposed in this utility model;

[0028] Figure 2 This is the second schematic diagram of the structure of an array-type pipeline molten salt storage device proposed in this utility model;

[0029] Figure 3 This is the third schematic diagram of the structure of an array-type pipeline molten salt storage device proposed in this utility model;

[0030] Figure 4 This is a schematic diagram of the storage section of an array-type pipeline molten salt storage device proposed in this utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the input pipe and the first storage pipe in an array-type pipeline molten salt storage device proposed in this utility model;

[0032] Figure 6 This is a schematic diagram of the support structure in an array-type pipeline molten salt storage device proposed in this utility model;

[0033] In the attached diagram: 1. Support unit; 10. Support frame; 11. Insulation layer; 12. Embedded block; 13. Support pier; 2. Shut-off valve; 3. Input pipe; 4. Output pipe; 5. Third storage pipe; 6. First storage pipe; 7. Fourth storage pipe; 8. Thermal insulation layer; 9. Second storage pipe. Detailed Implementation

[0034] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0039] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0040] This utility model proposes an array-type pipeline molten salt storage device, such as Figures 1-6As shown, it includes a storage unit, and a support unit 1 is provided at the bottom of the storage unit. The support unit 1 lifts the storage unit from the ground, providing a stable placement platform for the storage unit.

[0041] The storage unit includes a first storage tube 6 and a second storage tube 9, which correspond one-to-one and are parallel to each other. An input tube 3 is connected to one end of the first storage tube 6, and an output tube 4 is connected to the other end of the first storage tube 6. The input tube 3 and the output tube 4 are parallel to each other, and a support part 1 is provided at the bottom of the input tube 3 and the output tube 4. Multiple arrayed third storage tubes 5 are connected between the first storage tube 6 and the second storage tube 9. The third storage tubes 5 are connected to the first storage tube 6 and the second storage tube 9 respectively. A fourth storage tube 7 is provided at both ends of the second storage tube 9. The fourth storage tube 7 is parallel to the input tube 3. Molten salt is input into the first storage tube 6 through the input tube 3, and then flows into the third storage tube 5, the second storage tube 9 and the fourth storage tube 7 for storage. An exhaust valve is provided on the fourth storage tube 7. During the storage of molten salt, the exhaust valve is used to exhaust the air.

[0042] like Figures 1-5 As shown, multiple third storage tubes 5 are equally spaced between the first storage tube 6 and the second storage tube 9, and each third storage tube 5 is connected to both the first storage tube 6 and the second storage tube 9. Multiple first storage tubes 6 and multiple first storage tubes 9 are also provided. Multiple first storage tubes 6 are arranged in a parallel row between the input tube 3 and the output tube 4, and each first storage tube 6 is connected to both the input tube 3 and the output tube 4. Multiple second storage tubes 9 are arranged in a parallel row above the first storage tubes 6, and the ports on the same side of the multiple second storage tubes 9 are connected to a fourth storage tube 7, with each second storage tube 9 connected to the fourth storage tube 7. Multiple third storage tubes 5 are arranged in a matrix to form an array-type pipeline. The upper port of each third storage tube 5 is connected to the second storage tube 9, and the lower port of each third storage tube 5 is connected to the first storage tube 6. Molten salt is stored through this array-type pipeline.

[0043] like Figures 1-5As shown, the first storage pipe 6, the second storage pipe 9, the input pipe 3, the output pipe 4, and the fourth storage pipe 7 are all composed of multiple straight pipes and multiple tee joints spliced ​​together at intervals. The straight pipes are coaxially connected, and a plug is connected to the end of the straight pipe furthest from the tee joint. The corresponding tee joints in the first and second storage pipes 6 and 9 connect to the third storage pipe 5. The diameters of the straight pipes and the third storage pipe 5 are 300~3000mm. In this device, the first storage pipe 6, the second storage pipe 9, the input pipe 3, the output pipe 4, and the fourth storage pipe 7 are formed by straight pipes and tee joints, reducing the number of welding positions and thus reducing the amount of welding work. Workers only need to assemble the pipes and weld and fix some parts to obtain this storage device, reducing construction intensity and difficulty, and improving construction efficiency. Furthermore, in this storage device, the molten salt storage space is formed through the pipes, reducing weld seams. The distributed storage through multiple pipes avoids thermal gradients, preventing excessive local thermal stress and stress concentration, thus extending the service life of this storage device.

[0044] like Figure 3 As shown, the input pipe 3, output pipe 4 and fourth storage pipe 7 are all covered with a heat insulation layer 8, which further slows down the loss of molten salt temperature on the input pipe 3, output pipe 4 and fourth storage pipe 7.

[0045] like Figure 1 , Figure 2 , Figure 4 and Figure 6The support unit 1 includes a support pier 13 set on the ground. An installation groove is provided on the top surface of the support pier 13, and a pre-embedded block 12 is installed in the installation groove. Concrete is poured into the installation groove along the side of the pre-embedded block 12, fixing the pre-embedded block 12 to the support pier 13 with the concrete, making the pre-embedded block 12 and the support pier 13 a single unit. A heat insulation layer 11 with a thickness of 300mm~600mm is provided on the top surface of the pre-embedded block 12. A support frame 10 is provided on the top surface of the heat insulation layer 11. The support frame 10 consists of multiple U-shaped rods arranged side by side, with the openings of the U-shaped rods pointing vertically upwards. The bottoms of the multiple U-shaped rods are connected by connecting rods. In two adjacent U-shaped rods, the U-shaped end of one U-shaped rod is connected to the other U-shaped rod. A diagonal brace is provided at the bottom end of the support frame 10, and the projection of the diagonal brace in the vertical plane coincides with the projection of the position of one side of the U-shaped rod in the vertical plane. An arc-shaped plate is provided on the top end face of the support frame 10, with the arc opening of the arc plate facing upward. The outer wall of the arc plate is connected to the U-shaped port of the U-shaped rod. The upper end of the arc plate is fixed with an input pipe 3 or an output pipe 4. The storage part is supported by a support pier 13 in this support part 1, so that it is a certain height above the ground. The upper end of the support pier 13 is insulated by a heat insulation layer 11. The upper end of the heat insulation layer 11 is further separated from the storage part by a U-shaped rod, increasing the distance between the storage part and the ground, so as to prevent the heat of the high-temperature molten salt stored in the storage part from being transferred to the support pier 13 and causing damage to the support pier 13.

[0046] like Figure 1 and Figure 2 As shown, shut-off valves 2 are installed at the input port of input pipe 3 and the output port of output pipe 4. The shut-off valves 2 control the input pipe of input pipe 3 and the output pipe of output pipe 4, thereby improving the reliability and safety of the system. The shut-off valve 2 is an electromagnetic gate valve.

[0047] Preferably, pressure detection components and thermometers are installed on both the input pipe 3 and the output pipe 4. The pressure detection component includes a pressure valve and a pressure detector, which is electrically connected to the pressure valve. The pressure measuring range of the pressure detector is 0.1 MPa to 2.5 MPa. When the pressure in the pipeline exceeds 2.5 MPa, the pressure detector controls the pressure valve to open, thereby relieving pressure in the pipeline and improving the safety of the storage device. The temperature measuring range of the thermometer is 100℃ to 600℃. The temperature in the pipeline is detected by the thermometer so that the staff can quickly obtain the temperature of the molten salt stored in the storage device.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0049] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

Claims

1. An array-type pipeline molten salt storage device, characterized in that, Includes a storage section, and a support section (1) is provided at the bottom of the storage section. The storage unit includes a first storage tube (6) and a second storage tube (9), and a plurality of third storage tubes (5) arranged in an array are connected between the first storage tube (6) and the second storage tube (9). The third storage tubes (5) are respectively connected to the first storage tube (6) and the second storage tube (9). An input tube (3) is connected to one end of the first storage tube (6), and an output tube (4) is connected to the other end of the first storage tube (6). The support part (1) is provided at the bottom of the input tube (3) and the output tube (4). A fourth storage tube (7) is provided at the port of the second storage tube (9).

2. The array-type pipeline molten salt storage device according to claim 1, characterized in that, The first storage tube (6) and the second storage tube (9) correspond one-to-one and are parallel to each other; The input tube (3) is parallel to the output tube (4), and the fourth storage tube (7) is parallel to the input tube (3).

3. The array-type pipeline molten salt storage device according to claim 2, characterized in that, Multiple third storage tubes (5) are provided at equal intervals between the first storage tube (6) and the second storage tube (9) that correspond one-to-one. The third storage tubes (5) are respectively connected to the first storage tube (6) and the second storage tube (9).

4. The array-type pipeline molten salt storage device according to claim 3, characterized in that, Both the first storage tube (6) and the second storage tube (9) are provided with multiple units; Multiple first storage tubes (6) are arranged in parallel in a row between the input tube (3) and the output tube (4), and each first storage tube (6) is connected to the input tube (3) and the output tube (4) respectively; Multiple second storage tubes (9) are arranged in parallel in a row above the first storage tube (6), and the ports on the same side of the multiple second storage tubes (9) are connected to a fourth storage tube (7), and each second storage tube (9) is connected to the fourth storage tube (7); The third storage tubes (5) are arranged in a matrix, with the upper port of each third storage tube (5) connected to the second storage tube (9) and the lower port of each third storage tube (5) connected to the first storage tube (6).

5. The array-type pipeline molten salt storage device according to claim 4, characterized in that, The first storage tube (6), the second storage tube (9), the input tube (3), the output tube (4) and the fourth storage tube (7) are all composed of multiple straight tubes and multiple tee joints spliced ​​together at intervals, and the multiple straight tubes are coaxially connected, with a plug connected to the port of the straight tube at the end away from the tee joint.

6. The array-type pipeline molten salt storage device according to claim 5, characterized in that, The diameter of the straight pipe and the third storage pipe (5) is 300mm~3000mm.

7. The array-type pipeline molten salt storage device according to claim 5, characterized in that, The input pipe (3), the output pipe (4) and the fourth storage pipe (7) are all covered with a heat insulation layer (8).

8. The array-type pipeline molten salt storage device according to claim 1, characterized in that, The support part (1) includes a support block (13) set on the ground. A pre-embedded block (12) is provided on the top end face of the support block (13). A heat insulation layer (11) with a thickness of 300mm~600mm is provided on the top end face of the pre-embedded block (12). A support frame (10) is provided on the top end face of the heat insulation layer (11). An arc plate is provided on the top end face of the support frame (10). The upper end of the arc plate is fixed to the input pipe (3) or the output pipe (4).

9. An array-type pipeline molten salt storage device according to claim 2, characterized in that, A shut-off valve (2) is installed at the input port of the input pipe (3) and at the output port of the output pipe (4).

10. An array-type pipeline molten salt storage device according to claim 9, characterized in that, Pressure detection components and thermometers are installed on both the input tube (3) and the output tube (4); the pressure detection component has a pressure measurement range of 0.1 MPa to 2.5 MPa; the thermometer has a temperature measurement range of 100℃ to 600℃.

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