Spherical tank structure capable of bearing medium temperature fluctuation and heat storage system
By installing spray and overflow devices inside the spherical tank, the temperature fluctuation of the medium is buffered, which solves the problems of a large number of tanks and thermal stress in traditional thermal storage systems, thereby extending equipment life and saving costs.
Patent Information
- Application Number
- CN202422582884.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-10-24
AI Technical Summary
In traditional thermal storage systems, high-temperature and low-temperature media are stored in different spherical tanks, resulting in a large number of tanks, high investment costs, and a large footprint. Furthermore, ordinary spherical tanks are prone to thermal stress when there is a large temperature difference between the media, which affects the lifespan of the equipment.
By installing a spray system and an overflow system inside the spherical tank, thermal stress can be reduced and the equipment lifespan extended through media buffering and temperature homogenization.
It effectively reduces the number of tanks, lowers investment costs and floor space, while extending equipment life and protecting tanks from cracking due to thermal stress.
Smart Images
Figure CN223484938U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of thermal storage systems, and relates to a spherical tank structure and thermal storage system that can withstand temperature fluctuations of the medium. Background Technology
[0002] In some scenarios, such as compressed air thermal storage systems, the storage of high-temperature media is involved. These systems require a lifespan of 30 years for the storage equipment. Traditional methods utilize a fixed number of high-temperature and low-temperature spherical tanks for heat storage and release cycles. Because the high-temperature and low-temperature media are stored separately in their respective tanks, the internal temperature of each tank remains constant, resulting in relatively low thermal stress. While this ensures the equipment's lifespan, the large number of tanks leads to significant investment and floor space requirements, resulting in high production costs.
[0003] A new technical approach can be adopted, namely, a tank circulation heat storage and release method. Each spherical tank can be used to store high-temperature and low-temperature media in rotation, and can be used as a cold tank or a hot tank. This can reduce the number of tanks by nearly half, effectively saving investment costs and space.
[0004] However, this method places extremely high demands on the performance of the tank. If the temperature difference between the hot and cold media is too large, ordinary spherical tank equipment is prone to thermal stress, which can cause fatigue and creep in the tank, leading to cracking and affecting the lifespan of the equipment. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a spherical tank structure and heat storage system that can withstand the temperature fluctuation of the medium. By setting up a spray device and an overflow device inside the spherical tank, the medium entering the tank is buffered, ensuring that the temperature of the tank metal rises slowly and evenly, thereby reducing the thermal stress on the tank and effectively extending the service life of the equipment.
[0006] To achieve the above objectives, the technical solution of this utility model is to provide a spherical tank structure and a thermal storage system capable of withstanding medium temperature fluctuations, including,
[0007] Spherical tank body;
[0008] An overflow device is installed inside the spherical tank body, through which the medium enters the spherical tank;
[0009] An inlet pipe is connected to the overflow device to input the medium into the overflow device;
[0010] A spraying device is installed inside the spherical tank body to change the temperature of the spherical tank body;
[0011] A spray pipe is connected to the spray device to provide the spray medium to the spray device;
[0012] The outlet pipeline is connected to the interior of the spherical tank body and is used to discharge the medium inside the spherical tank body.
[0013] The interior of the spherical tank is equipped with a spray device and an overflow device to buffer the medium entering the tank, ensuring that the temperature of the tank metal rises slowly and evenly, reducing the thermal stress on the tank and effectively extending the equipment's lifespan.
[0014] According to this utility model, the inlet pipeline further includes an inlet pipe, an inlet pump, and a first valve; one end of the inlet pipe is connected to the overflow device; the inlet pipe is equipped with an inlet pump and a first valve; the two can be opened or closed simultaneously to realize the flow of the medium.
[0015] According to this utility model, after the overflow device is filled with medium, the high-temperature medium will overflow to the bottom of the spherical tank and mix with the low-temperature liquid reserved at the bottom, so that the high-temperature medium enters the low-temperature tank.
[0016] According to this utility model, the outlet pipeline further includes an outlet pipe, an outlet pipe pump, and a second valve; one end of the outlet pipe is connected to the interior of the spherical tank body; the outlet pipe is equipped with an outlet pipe pump and a second valve; by simultaneously opening the outlet pipe pump and the second valve, the medium inside the spherical tank body is discharged.
[0017] According to this utility model, the spray pipeline further includes a spray pipe and a third valve. One end of the spray pipe is connected to the spray device, and the other end is connected to the outlet pipe to form a spray cycle.
[0018] According to this utility model, the outlet pipe pump and the second valve are respectively located on both sides of the connection between the spray pipe and the outlet pipe; during spraying operation, the second valve is closed and the outlet pipe pump and the third valve are open; during discharge operation, the third valve is closed and the outlet pipe pump and the second valve are open.
[0019] According to this utility model, the low-temperature medium reserved at the bottom of the spherical tank body can be replaced with a high-temperature medium, and the high-temperature medium input into the spherical tank body can be replaced with a low-temperature medium, so as to realize the low-temperature medium entering the high-temperature tank body.
[0020] The beneficial effects of this utility model are:
[0021] 1. It can help implement the method of tank circulation for heat storage and release, that is, each spherical tank can rotate to store high-temperature and low-temperature media, and can be used as a cold tank or a hot tank, which can reduce the number of tanks by nearly half, effectively saving investment costs and space.
[0022] 2. Compared to ordinary spherical tank equipment, the spherical tank equipment of this utility model adds a spray device at the top of the tank and an overflow device at the bottom. The overflow device at the bottom of the tank effectively reduces the thermal stress impact on the lower half of the tank, while the spray device at the top effectively reduces the thermal stress impact on the upper half of the tank. Both devices reduce the rate of temperature rise inside the tank while ensuring uniform heating of the tank metal, thus providing complete protection for the entire storage tank equipment. 3. It can assist in the implementation of tank-based circulating heat storage and release systems in similar compressed air energy storage projects, reducing the number of heat and cold storage tanks in the entire system, thereby reducing the initial investment of the entire system. Attached Figure Description
[0023] Figure 1 This is a schematic diagram of the spherical tank structure of this utility model that can withstand the temperature fluctuations of the medium.
[0024] In the attached diagram,
[0025] 1-Spherical tank body, 2-Spraying device, 3-Overflow device, 10-Inlet pipe, 11-Inlet pipe pump, 12-First valve, 20-Outlet pipe, 21-Second valve, 22-Outlet pipe pump, 30-Spraying pipe, 31-Third valve. Detailed Implementation
[0026] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.
[0027] See also Figure 1 A spherical tank structure and system capable of withstanding medium temperature fluctuations includes a spherical tank body 1, a spray device 2, an overflow device 3, an inlet pipe 10, an inlet pipe pump 11, a first valve 12, an outlet pipe 20, a second valve 21, an outlet pipe pump 22, a spray pipe 30, and a third valve 31.
[0028] During the heat storage process, the first valve 12 is opened first, and then the inlet pipe pump 11 is opened, so that the high-temperature medium can flow into the overflow device 3 at the bottom of the spherical tank through the inlet pipe 10. The flowing medium will first be stored in the overflow device 3 at the bottom of the spherical tank. When the overflow device is full of medium, the high-temperature medium will overflow to the bottom of the spherical tank and mix with the low-temperature liquid reserved at the bottom.
[0029] When the temperature difference between the mixed medium and the lowest metal temperature of the tank wall is about to reach the maximum temperature difference that the tank metal can withstand, the third valve 31 is opened, the second valve 21 is closed, and the outlet pipe pump 22 is turned on. The mixed fluid at the bottom of the tank is pumped into the spray pipe 30 through the outlet pipe pump 22. The medium in the spray pipe 30 enters the spray device 2 at the top of the spherical tank body 1 and sprays it in multiple directions onto the inner tank wall at the top of the spherical tank body 1 to reduce the temperature difference between the highest and lowest temperatures of the tank wall metal.
[0030] When the temperature inside the tank reaches the design value, shut off the outlet pipe pump 22, close the third valve 31, and close the second valve 21, so that the high-temperature medium continues to enter the tank through the first valve 12 and the inlet pipe pump 11 until the medium reaches the preset liquid level.
[0031] During the heat release process, turn on the outlet pipe pump 22 and the second valve 21 to discharge the high-temperature medium in the tank.
[0032] When the medium mentioned above is a low-temperature medium, the entire cold storage process is the same and will not be described in detail here.
[0033] If a similar spherical tank system requires multiple units to be connected in parallel, a single inlet pipe pump can be installed on the main inlet pipe to reduce costs.
[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.
Claims
1. A spherical tank structure capable of withstanding temperature fluctuations of the medium, wherein, include, Spherical tank body; An overflow device is installed inside the spherical tank body, through which the medium enters the spherical tank; An inlet pipe is connected to the overflow device to input the medium into the overflow device; A spraying device is installed inside the spherical tank body to change the temperature of the internal medium of the spherical tank body; A spray pipe is connected to the spray device to provide the spray medium to the spray device; The outlet pipeline is connected to the interior of the spherical tank body and is used to discharge the medium inside the spherical tank body.
2. The spherical tank structure capable of withstanding medium temperature fluctuations as described in claim 1, wherein, The inlet pipeline includes an inlet pipe, an inlet pump, and a first valve; one end of the inlet pipe is connected to the overflow device; the inlet pipe is equipped with an inlet pump and a first valve; the two can be opened or closed simultaneously to realize the flow of the medium.
3. The spherical tank structure capable of withstanding medium temperature fluctuations as described in claim 1, wherein, After the overflow device is filled with the medium, the high-temperature medium will overflow to the bottom of the spherical tank and mix with the low-temperature liquid reserved at the bottom, so that the high-temperature medium can enter the low-temperature tank.
4. The spherical tank structure capable of withstanding medium temperature fluctuations as described in claim 1, wherein, The outlet pipeline includes an outlet pipe, an outlet pipe pump, and a second valve; one end of the outlet pipe is connected to the interior of the spherical tank body; the outlet pipe is equipped with an outlet pipe pump and a second valve; by simultaneously opening the outlet pipe pump and the second valve, the medium inside the spherical tank body can be discharged.
5. The spherical tank structure capable of withstanding medium temperature fluctuations as described in claim 1, wherein, The spray pipeline includes a spray pipe and a third valve. One end of the spray pipe is connected to the spray device, and the other end is connected to the outlet pipe to form a spray cycle.
6. The spherical tank structure capable of withstanding medium temperature fluctuations as described in claim 4, wherein, The outlet pipe pump and the second valve are located on both sides of the connection between the spray pipe and the outlet pipe, respectively. During spraying operations, the second valve is closed and the outlet pipe pump and the third valve are open. During discharge operations, the third valve is closed and the outlet pipe pump and the second valve are open.
7. The spherical tank structure capable of withstanding medium temperature fluctuations as described in claim 3, wherein, The low-temperature medium reserved at the bottom of the spherical tank body can be replaced with a high-temperature medium, and the high-temperature medium input into the spherical tank body can be replaced with a low-temperature medium, so that the low-temperature medium can enter the high-temperature tank.
8. A thermal storage system, wherein, Includes the spherical tank structure capable of withstanding medium temperature fluctuations as described in any one of claims 1-7.