A molten salt storage tank for thermal power plants

Abstract

This utility model provides a molten salt energy storage tank for a thermal power plant, relating to the field of energy storage tank technology. The utility model includes a tank body, with a feed pipe and a steam inlet pipe fixedly connected to the top of the tank body. A steam exhaust pipe is provided on one side of the bottom of the tank body. A buffer device is provided at the top of the steam inlet pipe. The buffer device includes a first flange and a second flange. A sleeve is fixedly connected to the bottom of the second flange, and a cylinder is fixedly connected to the top of the first flange. Two support rods are fixedly connected to the outer surface of the first flange. This utility model, by setting up a buffer device and installing it between the steam inlet pipe and the steam delivery pipe, allows high-pressure air and steam to move inside the tank body when high-temperature steam enters, causing the pressure to rise. This movement pushes the telescopic pipe to extend, buffering the high pressure inside the tank body and preventing the connection between the feed pipe and the steam delivery pipe from being subjected to excessive pressure and causing loosening.

Description

Technical Field

[0001] This utility model relates to the field of energy storage tank technology, and in particular to a molten salt energy storage tank for thermal power plants. Background Technology

[0002] Molten salt storage tanks in thermal power plants are devices used to store high-temperature molten salt and are one of the core components of molten salt energy storage systems. They utilize the temperature difference between the molten salt and the surrounding environment during heating and cooling to store thermal energy. During the energy storage phase, the molten salt is heated to a high temperature to store a large amount of thermal energy; during the energy release phase, the high-temperature molten salt transfers heat to the working fluid through a heat exchanger.

[0003] When using molten salt storage tanks, steam heating can be used to heat the molten salt inside. When high-temperature steam enters the tank through the pipeline, it causes a rapid increase in temperature and pressure inside the tank. At this time, the pipeline connecting the top of the tank to the steam pipeline may loosen due to the high pressure, leading to a decrease in the stability of the tank during use. Utility Model Content

[0004] The purpose of this invention is to address the problem that when high-temperature steam enters the tank through a pipeline, the temperature and pressure inside the tank rise sharply. At this time, the pipeline connecting the top of the tank to the steam pipeline may loosen due to the high pressure, leading to a decrease in the stability of the tank during use. This invention provides a molten salt energy storage tank for thermal power plants.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a molten salt energy storage tank for a thermal power plant, comprising a tank body, a feed pipe and a steam inlet pipe fixedly connected to the top of the tank body, a steam exhaust pipe provided on one side of the bottom of the tank body, a support leg for supporting the tank body provided at the bottom of the outer surface of the tank body, and a buffer device provided at the top of the steam inlet pipe for buffering the internal pressure of the tank body when high-temperature steam enters the tank body.

[0006] Preferably, the buffer device includes a first flange and a second flange, with a high-temperature resistant rubber telescopic tube fixedly connected between the first flange and the second flange. A sleeve is fixedly connected to the bottom end of the second flange, and a cylinder is fixedly connected to the top end of the first flange. The sleeve slides on the outer surface of the cylinder. Retaining rings are fixedly connected to the upper and lower ends of the inner wall of the telescopic tube, respectively. Two support rods are fixedly connected to the outer surface of the first flange, with the top ends of the two support rods located above the second flange. A spring is provided at the end of each support rod away from the first flange, and the two ends of the spring are fixedly connected to one end of the support rod and one end of the second flange, respectively.

[0007] The effects achieved by the above components are as follows: When installing the energy storage tank, the bottom end of the first flange is attached to the outer surface of the steam inlet pipe, and the first flange is fixedly connected to the top end of the steam inlet pipe using fasteners. Then, the steam delivery pipe is connected to the second flange using fasteners, and the molten salt delivery pipe is connected to the feed pipe using fasteners. During operation, molten salt is fed into the tank through the feed pipe, and steam is fed into the outer layer of the tank through the steam inlet pipe to heat the molten salt inside the tank. The steam will be discharged through the exhaust pipe on one side of the tank. When the pressure inside the tank increases due to the entry of high-temperature steam, the high-pressure air and steam will move inside the telescopic tube, pushing the telescopic tube to extend. At the same time, the second flange will move upward and compress the spring located below the support rod. The sleeve will move upward on the outer surface of the cylinder, limiting the angle between the first flange and the second flange. The extension of the telescopic tube buffers the high pressure inside the tank, preventing the connection between the feed pipe and the steam delivery pipe from being subjected to excessive pressure and causing loosening.

[0008] Preferably, the two retaining rings located at the upper and lower ends inside the telescopic tube are both inclined surfaces on the side that are close to each other.

[0009] The effect achieved by the above components is that by setting the two retaining rings close to each other with an inclined surface, the high-pressure air and steam inside the telescopic tube can more easily push the telescopic tube to extend.

[0010] Preferably, a round rod is fixedly connected to one side of the second flange, and the end of the rod away from the first flange slides on the outer surface of the round rod.

[0011] The effect achieved by the above components is that by setting the round rod, the angle between the second flange and the support rod and the first flange can be further restricted, thereby increasing the overall stability of the buffer device.

[0012] Preferably, two positioning blocks are fixedly connected to the outer surface of the first flange, and the side of the two positioning blocks that is close to each other is an arc surface.

[0013] The effect achieved by the above components is that when the first flange is connected to the steam inlet pipe at the top of the tank, the positioning block can be stuck on both sides of the outer surface of the steam inlet pipe to limit the angle between the first flange and the steam inlet pipe, thereby improving the convenience of installing the buffer device.

[0014] Preferably, a reinforcing rod is fixedly connected to one side of the support rod, and the end of the reinforcing rod away from the support rod is fixedly connected to the top of the positioning block.

[0015] The effect achieved by the above-mentioned components is that by setting up reinforcing rods, the side of the support rod away from the first flange can be supported, further improving the overall stability of the buffer device.

[0016] Preferably, a rubber auxiliary ring is fixedly connected to the bottom end of the sleeve, and the inner ring of the auxiliary ring is attached to the outer surface of the cylinder.

[0017] The effect achieved by the above components is that the movement of the telescopic tube and the cylinder can be further buffered by setting the rubber auxiliary ring.

[0018] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0019] In this invention, a buffer device is installed between the steam inlet pipe and the steam delivery pipe. When the pressure inside the tank increases due to the entry of high-temperature steam, the high-pressure air and steam will move inside the telescopic pipe, pushing the telescopic pipe to extend. The extension of the telescopic pipe buffers the high pressure inside the tank, preventing the connection between the feed pipe and the steam delivery pipe from being subjected to excessive pressure and causing loosening. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 2 This is a three-dimensional structural diagram of the tank body of this utility model;

[0022] Figure 3 This is a three-dimensional structural diagram of the cylindrical part of this utility model;

[0023] Figure 4 This is a three-dimensional structural diagram of the support rod of this utility model;

[0024] Figure 5 This is a partial cross-sectional three-dimensional structural diagram of the sleeve of this utility model.

[0025] Legend: 1. Tank body; 2. Buffer device; 21. First flange; 22. Telescopic pipe; 23. Second flange; 24. Sleeve; 25. Cylinder; 26. Retaining ring; 27. Support rod; 28. Spring; 29. ​​Round rod; 210. Reinforcing rod; 211. Auxiliary ring; 212. Positioning block; 3. Feed pipe; 4. Steam inlet pipe; 5. Steam outlet pipe. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0028] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0029] Example 1, such as Figure 1-2 As shown, a molten salt energy storage tank for a thermal power plant includes a tank body 1. The top of the tank body 1 is fixedly connected to a feed pipe 3 and a steam inlet pipe 4. A steam exhaust pipe 5 is provided on one side of the bottom end of the tank body 1. The bottom of the outer surface of the tank body 1 is provided with a support leg for supporting the tank body 1. The top of the steam inlet pipe 4 is provided with a buffer device 2 that can buffer the internal pressure of the tank body 1 when high-temperature steam enters the tank body 1.

[0030] Reference Figure 1-5As shown in this embodiment: the buffer device 2 includes a first flange 21 and a second flange 23. A high-temperature resistant rubber telescopic tube 22 is fixedly connected between the first flange 21 and the second flange 23. A sleeve 24 is fixedly connected to the bottom end of the second flange 23. A cylinder 25 is fixedly connected to the top end of the first flange 21. The sleeve 24 slides on the outer surface of the cylinder 25. Retaining rings 26 are fixedly connected to the upper and lower ends of the inner wall of the telescopic tube 22. Two support rods 27 are fixedly connected to the outer surface of the first flange 21. The top ends of the two support rods 27 are located above the second flange 23. A spring 28 is provided at the end of the support rod 27 away from the first flange 21. The two ends of the spring 28 are fixedly connected to one end of the support rod 27 and one end of the second flange 23, respectively. When installing the energy storage tank, the bottom end of the first flange 21 is attached to the outer surface of the steam inlet pipe 4, and fasteners are used to fix the first flange 21 to the top end of the steam inlet pipe 4. Then, the steam conveying pipeline is connected to the second flange 23 with fasteners, and the molten salt conveying pipeline is connected to the feed pipe 3 with fasteners. During operation, molten salt is fed into the tank 1 through the feed pipe 3, and steam is fed into the outer layer of the tank 1 through the steam inlet pipe 4 to heat the molten salt inside the tank 1. The steam will be discharged through the exhaust pipe 5 on one side of the tank 1. When the pressure inside the tank 1 increases due to the entry of high-temperature steam, the high-pressure air and steam will move inside the telescopic pipe 22 to push the telescopic pipe 22 to extend. At the same time, the second flange 23 will move upward and compress the spring 28 located below the support rod 27. The sleeve 24 will move upward on the outer surface of the cylinder 25 to limit the angle between the first flange 21 and the second flange 23. The extension of the telescopic pipe 22 buffers the high pressure inside the tank 1 and avoids the connection between the feed pipe 3 and the steam conveying pipeline being subjected to excessive pressure, which could cause loosening.

[0031] Reference Figure 2-5 As shown in this embodiment: the two retaining rings 26 located at the upper and lower ends inside the telescopic tube 22 are both inclined on the side that is close to each other. By setting the side that is close to each other of the two retaining rings 26 to be inclined, the high-pressure air and steam inside the telescopic tube 22 can more easily push the telescopic tube 22 to extend. A round rod 29 is fixedly connected to one side of the second flange 23. The end of the support rod 27 away from the first flange 21 slides on the outer surface of the round rod 29. By setting the round rod 29, the angle between the second flange 23 and the support rod 27 and the first flange 21 can be further restricted, thereby increasing the stability of the overall structure of the buffer device 2.

[0032] Reference Figure 2-5As shown in this embodiment: two positioning blocks 212 are fixedly connected to the outer surface of the first flange 21. The side of the two positioning blocks 212 that are close to each other is an arc surface. When the first flange 21 is connected to the steam inlet pipe 4 at the top of the tank body 1, the positioning blocks 212 are clamped on both sides of the outer surface of the steam inlet pipe 4 to limit the angle between the first flange 21 and the steam inlet pipe 4, thereby improving the convenience of installing the buffer device 2. A reinforcing rod 210 is fixedly connected to one side of the support rod 27. The end of the reinforcing rod 210 away from the support rod 27 is fixedly connected to the top of the positioning block 212. By setting the reinforcing rod 210, the side of the support rod 27 away from the first flange 21 can be supported, further improving the overall stability of the buffer device 2. A rubber auxiliary ring 211 is fixedly connected to the bottom end of the sleeve 24. The inner ring of the auxiliary ring 211 is attached to the outer surface of the cylinder 25. By setting the rubber auxiliary ring 211, the movement of the telescopic pipe 22 and the cylinder 25 can be further buffered.

[0033] Working principle: When installing the energy storage tank, the bottom end of the first flange 21 is attached to the outer surface of the steam inlet pipe 4, and the first flange 21 is fixedly connected to the top end of the steam inlet pipe 4 using fasteners. Then, the steam delivery pipe is connected to the second flange 23 using fasteners, and the molten salt delivery pipe is connected to the feed pipe 3 using fasteners. During operation, molten salt is fed into the tank 1 through the feed pipe 3, and steam is fed into the outer layer of the tank 1 through the steam inlet pipe 4 to heat the molten salt inside the tank 1. The steam is discharged through the exhaust pipe 5 on one side of the tank 1. When the pressure inside the tank 1 increases due to the entry of high-temperature steam, the high-pressure air and steam will move inside the telescopic tube 22, pushing the telescopic tube 22 to extend. At the same time, the second flange 23 will move upward and compress the spring 28 located below the support rod 27. The sleeve 24 will move upward on the outer surface of the cylinder 25, limiting the angle between the first flange 21 and the second flange 23. The extension of the telescopic tube 22 buffers the high pressure inside the tank 1, preventing the connection between the feed pipe 3 and the steam conveying pipe from being subjected to excessive pressure and causing loosening.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A molten salt energy storage tank for a thermal power plant, comprising a tank body (1), characterized in that: The top of the tank (1) is fixedly connected to a feed pipe (3) and a steam inlet pipe (4). A steam exhaust pipe (5) is provided on one side of the bottom of the tank (1). A support leg for supporting the tank (1) is provided at the bottom of the outer surface of the tank (1). A buffer device (2) is provided at the top of the steam inlet pipe (4) to buffer the pressure inside the tank (1) when high-temperature steam enters the tank (1).

2. The molten salt energy storage tank for a thermal power plant according to claim 1, characterized in that: The buffer device (2) includes a first flange (21) and a second flange (23). A high-temperature resistant rubber telescopic tube (22) is fixedly connected between the first flange (21) and the second flange (23). A sleeve (24) is fixedly connected to the bottom end of the second flange (23). A cylinder (25) is fixedly connected to the top end of the first flange (21). The sleeve (24) slides on the outer surface of the cylinder (25). A retaining ring (26) is fixedly connected to the upper and lower ends of the inner wall of the telescopic tube (22). Two support rods (27) are fixedly connected to the outer surface of the first flange (21). The top ends of the two support rods (27) are located above the second flange (23). A spring (28) is provided at the end of the support rod (27) away from the first flange (21). The two ends of the spring (28) are fixedly connected to one end of the support rod (27) and one end of the second flange (23), respectively.

3. A molten salt energy storage tank for a thermal power plant according to claim 2, characterized in that: The two retaining rings (26) located at the upper and lower ends inside the telescopic tube (22) are both inclined on the side that is close to each other.

4. A molten salt energy storage tank for a thermal power plant according to claim 2, characterized in that: A round rod (29) is fixedly connected to one side of the second flange (23), and the end of the support rod (27) away from the first flange (21) slides on the outer surface of the round rod (29).

5. A molten salt energy storage tank for a thermal power plant according to claim 4, characterized in that: Two positioning blocks (212) are fixedly connected to the outer surface of the first flange (21), and the side of the two positioning blocks (212) that are close to each other is an arc surface.

6. A molten salt energy storage tank for a thermal power plant according to claim 5, characterized in that: A reinforcing rod (210) is fixedly connected to one side of the support rod (27), and the end of the reinforcing rod (210) away from the support rod (27) is fixedly connected to the top of the positioning block (212).

7. A molten salt energy storage tank for a thermal power plant according to claim 6, characterized in that: A rubber auxiliary ring (211) is fixedly connected to the bottom end of the sleeve (24), and the inner ring of the auxiliary ring (211) is attached to the outer surface of the cylinder (25).

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