A molten salt heat storage tank heat preservation device of a solar photo-thermal power generation system

Abstract

The utility model relates to molten salt heat storage tank heat preservation technical field, and disclose a kind of solar thermal power generation system's molten salt heat storage tank heat preservation device, the molten salt heat storage tank heat preservation device of this solar thermal power generation system, including tank body, multiple heat preservation plates, multiple pressing plate, the outer surface of the tank body is fixedly sleeved with heat preservation cover, the surface of the heat preservation cover is fixedly connected with four heat preservation columns, the surface of each heat preservation column is fixedly connected with a row of mounting block, and multiple heat preservation plates are respectively installed between corresponding two mounting blocks;The heat preservation device can monitor the internal temperature of tank body when using, simultaneously heat tank body by electric heat tracing tape, so that it is kept at suitable temperature, simultaneously heat preservation is carried out by heat preservation plate, avoid heat loss, simultaneously when some heat preservation plate appears damage, the quick installation and disassembly of single heat preservation plate can be carried out, convenient to replace, need not entire replacement, convenient and fast.

Description

Technical Field

[0001] This utility model relates to the field of molten salt thermal storage tank insulation technology, specifically to a molten salt thermal storage tank insulation device for a solar thermal power generation system. Background Technology

[0002] Currently, the commercially validated mature molten salt product for thermal power generation is the binary mixed molten salt SolarSalt, composed of 60% NaNO3 and 40% KNO3. This molten salt has advantages such as low cost and good stability, and its operating temperature range can reach 290℃-565℃. Its disadvantage is its high freezing point of 220℃; all critical equipment and pipelines in the system must be protected from supercooling during operation, otherwise blockages or even damage to system equipment may occur. Furthermore, in solar thermal power generation systems, to ensure continuous and stable operation and high thermoelectric conversion efficiency, the temperature of the medium inside the storage tank must be stable. These two points place high demands on the insulation performance of the storage tank.

[0003] A search revealed a molten salt storage tank for solar thermal power generation, with publication number CN 210285404 U. The tank includes a top plate, a bottom plate, wall plates, a salt injection pipeline, and a heating device. The top plate, bottom plate, and wall plates form the tank body. The salt injection pipeline includes a downcomer and a distribution pipe for injecting molten salt. The downcomer is fixed to the top plate, and the distribution pipe is installed at the bottom of the tank. The distribution pipe has several salt outlets, the opening of which increases with the distance between the outlet and the downcomer; the outlets closer to the downcomer have smaller openings, while those farther away have larger openings. The heating device is an electric heating device and / or a hot air heating device. This invention, through the structure of the salt injection pipeline, ensures uniform distribution of molten salt during injection into the storage tank, and, combined with the heating device, ensures the tank temperature reaches the required level, preventing partial condensation of the molten salt.

[0004] However, the above technologies still have some shortcomings in use. In the existing technology, the insulation structure is mostly an integral design. When a certain part of the insulation component is damaged, the entire insulation layer needs to be disassembled and replaced, which results in a large amount of maintenance work, long time consumption, and may affect the normal operation of the storage tank. In addition, there is a lack of modular design, and the connection method between insulation components is complicated, which makes it impossible to quickly disassemble and assemble individual components, increasing maintenance costs and downtime. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a molten salt thermal storage tank insulation device for a solar thermal power generation system. This solves the problems of existing technologies where the insulation structure is mostly an integral design, requiring the entire insulation layer to be disassembled and replaced when a certain part of the insulation component is damaged. This results in a large workload and long maintenance time, which may affect the normal operation of the storage tank. Furthermore, the lack of modular design and the complex connection methods between insulation components make it impossible to quickly disassemble and assemble individual components, increasing maintenance costs and downtime.

[0006] This utility model provides the following technical solution: a molten salt thermal storage tank insulation device for a solar thermal power generation system, comprising a tank body, multiple insulation plates, and multiple pressure plates. An insulation cover is fixedly sleeved on the outer surface of the tank body. Four insulation columns are fixedly connected to the surface of the insulation cover. A row of mounting blocks is fixedly connected to the surface of each insulation column. Multiple insulation plates are respectively installed between two corresponding mounting blocks.

[0007] Each mounting block has a set of grooves on its surface, and multiple screws are fixedly connected to the inner wall of each groove. Each insulation board has mounting plates fixedly connected to both sides, and multiple mounting slots are formed on the surface of each mounting plate.

[0008] Preferred technical solution 1: Each screw has a nut threaded onto its surface, one end of each nut has a washer, and each pressure plate has multiple slots on its surface.

[0009] Preferred technical solution 2: The inner circle dimensions of the empty groove and the mounting groove are larger than the dimensions of the screw, and the diameter of the gasket is larger than the inner circle diameter of the empty groove and the mounting groove.

[0010] Preferred technical solution 3: The top of the tank is provided with a tank cover, and an electric heating tape is spirally wound around the surface of the tank. The electric heating tape is installed around the tank by pressure-sensitive tape. A control switch is provided on the upper surface of the tank cover, and one end of the electric heating tape extends to the outside of the tank and is electrically connected to the control switch.

[0011] Preferred technical solution four: The insulation board is arc-shaped, and both the insulation board and the insulation column are filled with aluminum silicate fiber.

[0012] Preferred technical solution five: Thermocouples are provided on the bottom wall and side walls of the tank, and the thermocouples are electrically connected to the control switch.

[0013] Compared with the prior art, this utility model provides a molten salt thermal storage tank insulation device for a solar thermal power generation system, which has the following beneficial effects: during use, the temperature inside the tank is monitored by thermocouples, and the surface of the tank is heated and insulated by electric heating tape to keep the tank at a suitable temperature. At the same time, the tank is further insulated by external insulation boards to prevent heat loss.

[0014] When an insulation board is damaged and needs to be replaced, the nut on the corresponding screw is turned off to release the locking of the pressure plate, mounting plate, and insulation board. The insulation board can then be removed for replacement. The new insulation board is placed in the replacement position, and the mounting plates on both sides of the insulation board are installed on the screw. The pressure plate is then installed on the screw, and the nut is installed on the screw. The pressure plate and mounting plate are pressed and locked by the washer to fix the insulation board in place, enabling quick replacement.

[0015] This insulation device can monitor the internal temperature of the tank during use, and heat the tank with an electric heating cable to maintain it at a suitable temperature. It also uses insulation boards to prevent heat loss. Furthermore, if a single insulation board is damaged, it can be quickly installed and removed for easy replacement without having to replace the entire board, making it convenient and quick. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the internal structure of the protective cover of this utility model;

[0018] Figure 3 This is a structurally disassembled view of the insulation board and mounting block of this utility model.

[0019] In the diagram: 1. Tank body; 2. Insulation cover; 3. Insulation column; 4. Mounting block; 5. Insulation board; 6. Groove; 7. Screw; 8. Pressure plate; 9. Mounting plate; 10. Mounting slot; 11. Nut; 12. Gasket; 13. Empty slot; 14. Tank lid; 15. Electric heating tape; 16. Control switch. Detailed Implementation

[0020] Please see Figure 1-3 ,

[0021] Example 1: A molten salt thermal storage tank insulation device for a solar thermal power generation system includes a tank body 1, multiple insulation plates 5, and multiple pressure plates 8. An insulation cover 2 is fixedly fitted onto the outer surface of the tank body 1. Four insulation columns 3 are fixedly connected to the surface of the insulation cover 2. A row of mounting blocks 4 is fixedly connected to the surface of each insulation column 3. Multiple insulation plates 5 are respectively installed between two corresponding mounting blocks 4.

[0022] Each mounting block 4 has a set of grooves 6 on its surface, and multiple screws 7 are fixedly connected to the inner wall of each groove 6. Each insulation board 5 has mounting plates 9 fixedly connected to both sides, and multiple mounting slots 10 are opened on the surface of each mounting plate 9.

[0023] Example 2: The difference between this example and Example 1 is that each screw 7 has a nut 11 threadedly installed on its surface, each nut 11 has a washer 12 at one end, and each pressure plate 8 has multiple slots 13 on its surface.

[0024] Example 3: The difference between this example and Example 1 is that the inner circle dimensions of the empty groove 13 and the mounting groove 10 are larger than the dimensions of the screw 7, and the diameter of the gasket 12 is larger than the inner circle diameter of the empty groove 13 and the mounting groove 10.

[0025] Example 4: The difference between this example and Example 1 is that the top of the tank 1 is provided with a tank cover 14, the surface of the tank 1 is spirally wrapped with an electric heating tape 15, the electric heating tape 15 is installed around the tank 1 by pressure-sensitive tape, the upper surface of the tank cover 14 is provided with a control switch 16, and one end of the electric heating tape 15 extends to the outside of the tank 1 and is electrically connected to the control switch 16.

[0026] Example 5: The difference between this example and Example 1 is that the insulation board 5 is arc-shaped, and both the insulation board 5 and the insulation column 3 are filled with aluminum silicate fiber.

[0027] Example 6: The difference between this example and Example 1 is that thermocouples are provided on the bottom and side walls of the tank 1, and the thermocouples are electrically connected to the control switch 16.

[0028] In summary, the molten salt thermal storage tank insulation device of this solar thermal power generation system monitors the internal temperature of the tank 1 through thermocouples, and heats and insulates the surface of the tank 1 through electric heating tape 15 to maintain a suitable temperature for the tank 1. At the same time, the external insulation board 5 further insulates the tank 1 to prevent heat loss.

[0029] When a certain insulation board 5 is damaged and needs to be replaced, the nut 11 on the corresponding screw 7 is turned to separate the nut 11 from the screw 7, thereby releasing the lock on the pressure plate 8, the mounting plate 9 and the insulation board 5. Then the insulation board 5 can be removed and replaced. The new insulation board 5 is placed in the replacement position, and the mounting plates 9 on both sides of the insulation board 5 are installed on the screw 7. Then the pressure plate 8 is installed on the screw 7, and the nut 11 is installed on the screw 7. The pressure plate 8 and the mounting plate 9 are pressed and locked by the washer 12, which can fix the insulation board 5 and achieve quick replacement.

[0030] During use, the insulation device can monitor the internal temperature of the tank 1 and heat the tank 1 with the electric heating tape 15 to maintain it at a suitable temperature. It also uses the insulation board 5 to keep the heat from being lost. When a single insulation board 5 is damaged, it can be quickly installed and removed for easy replacement without having to replace the entire board, making it convenient and quick.

Claims

1. A molten salt thermal storage tank insulation device for a solar thermal power generation system, comprising a tank body (1), multiple insulation plates (5), and multiple pressure plates (8), characterized in that: The outer surface of the tank (1) is fixedly fitted with a heat insulation cover (2), and four heat insulation columns (3) are fixedly connected to the surface of the heat insulation cover (2). A row of mounting blocks (4) is fixedly connected to the surface of each heat insulation column (3), and multiple heat insulation plates (5) are respectively installed between two corresponding mounting blocks (4). Each mounting block (4) has a set of grooves (6) on its surface. Each groove (6) has multiple screws (7) fixedly connected to its inner wall. Each insulation board (5) has mounting plates (9) fixedly connected to both sides. Each mounting plate (9) has multiple mounting slots (10) on its surface.

2. The molten salt thermal storage tank insulation device for a solar thermal power generation system according to claim 1, characterized in that: Each screw (7) has a nut (11) threaded onto its surface, and a washer (12) is provided at one end of each nut (11). Each pressure plate (8) has multiple slots (13) on its surface.

3. The molten salt thermal storage tank insulation device for a solar thermal power generation system according to claim 2, characterized in that: The inner circle dimensions of the empty groove (13) and the mounting groove (10) are larger than the dimensions of the screw (7), and the diameter of the gasket (12) is larger than the inner circle diameter of the empty groove (13) and the mounting groove (10).

4. The molten salt thermal storage tank insulation device for a solar thermal power generation system according to claim 1, characterized in that: The top of the tank (1) is provided with a lid (14), and an electric heating tape (15) is spirally wound on the surface of the tank (1). The electric heating tape (15) is installed around the tank (1) by pressure-sensitive tape. A control switch (16) is provided on the upper surface of the lid (14). One end of the electric heating tape (15) extends to the outside of the tank (1) and is electrically connected to the control switch (16).

5. The molten salt thermal storage tank insulation device for a solar thermal power generation system according to claim 1, characterized in that: The insulation board (5) is arc-shaped, and both the insulation board (5) and the insulation column (3) are filled with aluminum silicate fiber.

6. The molten salt thermal storage tank insulation device for a solar thermal power generation system according to claim 4, characterized in that: Thermocouples are provided on the bottom and side walls of the tank (1), and the thermocouples are electrically connected to the control switch (16).

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