Circulating water cooling system suitable for compressed air energy storage system

Abstract

The utility model provides a circulating water cooling system suitable for a compressed air energy storage system. The circulating water cooling system comprises the compressed air energy storage system, a closed cooling tower set, a circulating water pump set, a water collecting pool, a liquid level detector, a water storage pool, a water supplementing assembly and a controller. A coil liquid inlet of the closed cooling tower group is connected with a liquid outlet of the compressed air energy storage system, a coil liquid outlet of the closed cooling tower group is connected with a liquid inlet of the circulating water pump group, and a liquid outlet of the circulating water pump group is connected with a liquid inlet of the compressed air energy storage system; according to the closed cooling tower, the liquid level detector is installed in the water collecting tank of the closed cooling tower and can monitor the liquid level of cooling water in the water collecting tank in real time, and when the liquid level detector detects that the liquid level of the cooling water is reduced to the lower limit of the set liquid level range, the control valve controls the water replenishing assembly to automatically replenish water into the water collecting tank; and the water replenishing process is automatically controlled until the upper limit of the set liquid level range is reached.

Description

Technical Field

[0001] The present application belongs to the field of energy storage technology, and specifically relates to a circulating water cooling system suitable for a compressed air energy storage system. Background Art

[0002] Compressed air energy storage system can store a large amount of electrical energy in the power system and quickly release it for use in the power grid when needed, thereby achieving power balance and dispatch. Its working principle is to use a compressor to compress air through electricity and store it in an underground or ground gas storage device. When needed, the stored air is released through an expander to drive a generator to generate electricity.

[0003] When the compressed air energy storage power station is in operation, compression heat is generated due to air compression, and various pumps and equipment in the system will generate heat when working. The traditional water cooling system requires a large amount of cooling water to maintain the normal operation of the system, which may cause serious environmental and economic pressures in areas with water shortages. In the process of cooling using a closed cooling tower, some cooling water will evaporate into water vapor during heat exchange, and some cooling water particles will flow out of the tower with the air, resulting in a reduction in the water volume in the water collection pool at the bottom of the closed cooling tower, affecting the normal operation of the closed cooling tower. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0005] In order to solve the above problems, the present application provides a circulating water cooling system suitable for a compressed air energy storage system, including: a compressed air energy storage system, a closed cooling tower group, a circulating water pump group, a water collection tank, a liquid level detector, a water storage tank, a water replenishment component and a controller;

[0006] The coil liquid inlet of the closed cooling tower group is connected to the liquid outlet of the compressed air energy storage system, the coil liquid outlet of the closed cooling tower group is connected to the liquid inlet of the circulating water pump group, and the liquid outlet of the circulating water pump group is connected to the liquid inlet of the compressed air energy storage system:

[0007] The closed cooling tower group includes multiple closed cooling towers, each closed cooling tower has a liquid level detector on its water collection tank, a water replenishment component is provided between the water reservoir and the water collection tank of each closed cooling tower, and the controller is electrically connected to the liquid level detector and the water replenishment component.

[0008] Optionally, the water replenishment component includes: a water suction pump, a main pipeline, a branch pipeline and a first control valve;

[0009] The water suction pump is arranged in the water storage tank, and a main pipeline and a branch pipeline are arranged between the liquid outlet of the water suction pump and the liquid inlet of the water collection tank of each closed cooling tower, the first control valve is arranged on the branch pipeline, and the controller is electrically connected to the water suction pump and the first control valve.

[0010] Optionally, the first control valve is a solenoid valve.

[0011] Optionally, a first main pipe and a first branch pipe are provided between the liquid outlet of the compressed air energy storage system and the liquid inlet of the coil of the closed cooling tower group, and a second control valve is provided on the first branch pipe.

[0012] Optionally, the circulating water pump group includes multiple circulating water pumps, and a second branch pipe, a second main pipe and a third branch pipe are arranged between the coil outlet of the closed cooling tower group and the liquid inlet of the circulating water pump group, and a third control valve is arranged on the second branch pipe and the third branch pipe.

[0013] Optionally, a fourth branch pipe and a third main pipe are provided between the liquid outlet of the circulating water pump group and the liquid inlet of the compressed air energy storage system, and a fourth control valve is respectively provided on the fourth branch pipe.

[0014] Optionally, the second control valve and the third control valve are electric butterfly valves.

[0015] Optionally, the fourth control valve is a check valve.

[0016] Beneficial Effects

[0017] A circulating water cooling system suitable for a compressed air energy storage system is provided in an embodiment of the utility model. By installing a liquid level detector inside a water collection tank of a closed cooling tower, the liquid level detector can monitor the liquid level of the cooling water inside the water collection tank in real time. When the liquid level detector detects that the cooling water level drops to the lower limit of a set liquid level range, the control valve controls the water replenishment component to automatically replenish water in the water collection tank until the upper limit of the set liquid level range is reached. The water replenishment process is automatically controlled without manual intervention, thereby ensuring the normal operation of the closed cooling tower group and the cooling efficiency of the compressed air energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of a circulating water cooling system suitable for a compressed air energy storage system of the utility model;

[0019] Figure 2 This is a structural diagram of a water collection tank of a circulating water cooling system suitable for a compressed air energy storage system according to the utility model.

[0020] The reference numerals are:

[0021] 1. Compressed air energy storage system; 2. Closed cooling tower group; 3. Circulating water pump group; 4. Water collecting tank; 5. Liquid level detector; 6. Water reservoir; 7. Water replenishment component; 71. Suction pump; 72. Main pipeline; 73. Branch pipeline; 74. First control valve; 8. First main pipe; 9. First branch pipe; 10. Second control valve; 11. Second branch pipe; 12. Second main pipe; 13. Third branch pipe; 14. Third control valve; 15. Fourth branch pipe; 16. Third main pipe; 17. Fourth control valve. DETAILED DESCRIPTION

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0025] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0026] See also Figure 1-2As shown, according to an embodiment of the present application, a circulating water cooling system suitable for a compressed air energy storage system is provided, comprising: a compressed air energy storage system 1, a closed cooling tower group 2, a circulating water pump group 3, a water collection tank 4, a liquid level detector 5, a water reservoir 6, a water replenishment component 7 and a controller;

[0027] The coil liquid inlet of the closed cooling tower group 2 is connected to the liquid outlet of the compressed air energy storage system 1, the coil liquid outlet of the closed cooling tower group 2 is connected to the liquid inlet of the circulating water pump group 3, and the liquid outlet of the circulating water pump group 3 is connected to the liquid inlet of the compressed air energy storage system 1:

[0028] The closed cooling tower group 2 includes multiple closed cooling towers, and a liquid level detector 5 is provided on the water collecting tank 4 of each closed cooling tower. A water replenishment component 7 is provided between the water storage tank 6 and the water collecting tank 4 of each closed cooling tower, and the controller is electrically connected to the liquid level detector 5 and the water replenishment component 7.

[0029] Specifically, the compressed air energy storage system 1 will generate a large amount of heat due to air compression during the energy storage period. At the same time, the compressor and its related equipment will also generate heat. The circulating water with a higher temperature absorbed by the compressed air energy storage system 1 will be sent to the coil of the closed cooling tower group 2 under the drive of the circulating water pump group 3. Each closed cooling tower in the closed cooling tower group 2 draws the cooling water in the bottom water collection tank 4 to the spray pipe on the top of the tower, and forms small water droplets that move vertically downward at high speed through the nozzle. The small water droplets are evenly distributed on the coil, increasing the surface area of ​​the water droplets and exchanging heat with the circulating water in the pipe. The water droplets will also encounter the rising air flow during the descent process, which slows down the descent speed of the water particles, thereby extending the heat exchange time. The fan installed on the top of the closed cooling tower can force air to The water at the bottom of the closed cooling tower flows upward through the coil and exchanges heat with the circulating water in the coil. At the same time, it can also slow down the falling speed of water droplets and increase the heat exchange time. The cooling water after the heat exchange continues to be collected in the water collection tank 4 at the bottom of the closed cooling tower. However, during continuous use, the cooling water in the water collection tank 4 will continue to decrease. The liquid level detector 5 can monitor the liquid level of the cooling water inside the water collection tank 4 in real time and send the detection information to the controller. When the liquid level detector 5 detects that the liquid level of the cooling water drops to the lower limit of the set liquid level range, the controller controls the water replenishment component 7 to automatically replenish water in the water collection tank 4 until it reaches the upper limit of the set liquid level range. The water replenishment process is automatically controlled without manual intervention, which can ensure the normal operation of the closed cooling tower group 2 and the cooling efficiency of the compressed air energy storage system 1.

[0030] Wherein, the liquid level detector is a float type liquid level detector.

[0031] The water replenishment assembly 7 includes: a water suction pump 71, a main pipeline 72, a branch pipeline 73 and a first control valve 74;

[0032] The water suction pump 71 is arranged in the water reservoir 6, and a main pipeline 72 and a branch pipeline 73 are arranged between the liquid outlet of the water suction pump 71 and the liquid inlet of the water collecting tank 4 of each closed cooling tower. The first control valve 74 is arranged on the branch pipeline 73, and the controller is electrically connected to the water suction pump 71 and the first control valve 74.

[0033] Specifically, the water reservoir 6 is opened on one side of the closed cooling tower group 2. The water reservoir 6 is a box structure, and the internal space is used to store cooling water. The water suction pump 71 is located in the water reservoir 6, and its outlet is connected to multiple closed cooling towers through a main pipeline 72 and a branch pipeline 73, and a first control valve 74 is installed on the branch pipeline 73. It can realize the replenishment of water for the water collection tanks 4 of multiple closed cooling towers at the same time, and can also realize the replenishment of water for the water collection tanks 4 of some of the closed cooling towers, which is convenient for adjustment according to usage requirements.

[0034] The cooling water in the water reservoir 6 can be supplied by municipal tap water.

[0035] Among them, the controller is electrically connected to the water suction pump 71 and the first control valve 74. The controller can realize automatic opening and closing of the water suction pump 71 and the first control valve 74, so as to replenish water to the water collection pool 4 without manual operation, which is convenient to use.

[0036] The first control valve 74 is a solenoid valve.

[0037] Specifically, by configuring the first control valve 74 as a solenoid valve, it is convenient for the controller to control the first control valve 74 and to control the connection and disconnection of the branch pipeline 73.

[0038] A first main pipe 8 and a first branch pipe 9 are provided between the liquid outlet of the compressed air energy storage system 1 and the liquid inlet of the coil of the closed cooling tower group 2 , and a second control valve 10 is provided on the first branch pipe 9 .

[0039] Specifically, the first main pipe 8 is connected to the liquid outlet of the compressed air energy storage system 1, and multiple first branch pipes 9 are connected between the first main pipe 8 and multiple closed cooling towers, so as to realize parallel distribution among multiple closed cooling towers, and facilitate the selection of the number of closed cooling towers for cooling according to the amount of circulating water that needs to be cooled by the compressed air energy storage system 1 or the temperature that needs to be lowered of the circulating water, thereby improving the cooling efficiency of the circulating water and making the selection more flexible.

[0040] The circulating water pump group 3 includes multiple circulating water pumps. A second branch pipe 11, a second main pipe 12 and a third branch pipe 13 are arranged between the coil outlet of the closed cooling tower group 2 and the liquid inlet of the circulating water pump group 3. The second branch pipe 11 and the third branch pipe 13 are both provided with a third control valve 14.

[0041] Specifically, the circulating water cooled by the closed cooling tower group 2 is fed into the second main pipe 12 through the second branch pipe 11 to achieve the convergence of the cooled circulating water; the second main pipe 12 is connected to each circulating water pump through the third branch pipe 13, which is convenient for selecting the number of circulating water pumps to be turned on according to the amount of circulating water, and is more reasonable to use.

[0042] Among them, multiple circulating water pumps can be water pumps of the same model, or different models of water pumps can be selected and combined according to actual usage needs. The number of circulating water pumps to be turned on can be selected according to actual usage needs to save electricity.

[0043] A fourth branch pipe 15 and a third main pipe 16 are provided between the liquid outlet of the circulating water pump group 3 and the liquid inlet of the compressed air energy storage system 1 , and a fourth control valve 17 is provided on each of the fourth branch pipes 15 .

[0044] Specifically, the circulating water discharged by the circulating water pump group 3 is fed into the third main pipe 16 through the fourth branch pipe 15, and is fed into the compressed air energy storage system 1 through the third main pipe 16 to cool the circulating water inside the compressed air energy storage system 1.

[0045] The second control valve 10 and the third control valve 14 are electric butterfly valves.

[0046] The fourth control valve 17 is a check valve.

[0047] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A circulating water cooling system suitable for a compressed air energy storage system, characterized in that: include: Compressed air energy storage system (1), closed cooling tower group (2), circulating water pump group (3), water collection tank (4), liquid level detector (5), water storage tank (6), water replenishment component (7) and controller; The coil liquid inlet of the closed cooling tower group (2) is connected to the liquid outlet of the compressed air energy storage system (1), the coil liquid outlet of the closed cooling tower group (2) is connected to the liquid inlet of the circulating water pump group (3), and the liquid outlet of the circulating water pump group (3) is connected to the liquid inlet of the compressed air energy storage system (1): The closed cooling tower group (2) comprises a plurality of closed cooling towers, a liquid level detector (5) is provided on the water collecting tank (4) of each closed cooling tower, a water replenishment component (7) is provided between the water storage tank (6) and the water collecting tank (4) of each closed cooling tower, and the controller is electrically connected to the liquid level detector (5) and the water replenishment component (7).

2. The circulating water cooling system suitable for a compressed air energy storage system according to claim 1, characterized in that: The water replenishment component (7) comprises: a water suction pump (71), a main pipeline (72), a branch pipeline (73) and a first control valve (74); The water suction pump (71) is arranged in the water storage tank (6); a main pipeline (72) and a branch pipeline (73) are arranged between the liquid outlet of the water suction pump (71) and the liquid inlet of the water collecting tank (4) of each closed cooling tower; the first control valve (74) is arranged on the branch pipeline (73); and the controller is electrically connected to the water suction pump (71) and the first control valve (74).

3. The circulating water cooling system suitable for a compressed air energy storage system according to claim 2, characterized in that: The first control valve (74) is a solenoid valve.

4. The circulating water cooling system suitable for a compressed air energy storage system according to claim 3, characterized in that: A first main pipe (8) and a first branch pipe (9) are provided between the liquid outlet of the compressed air energy storage system (1) and the liquid inlet of the coil of the closed cooling tower group (2), and a second control valve (10) is provided on the first branch pipe (9).

5. The circulating water cooling system suitable for a compressed air energy storage system according to claim 4, characterized in that: The circulating water pump group (3) comprises a plurality of circulating water pumps, and a second branch pipe (11), a second main pipe (12) and a third branch pipe (13) are arranged between the coil outlet of the closed cooling tower group (2) and the liquid inlet of the circulating water pump group (3), and a third control valve (14) is arranged on the second branch pipe (11) and the third branch pipe (13).

6. The circulating water cooling system suitable for a compressed air energy storage system according to claim 5, characterized in that: A fourth branch pipe (15) and a third main pipe (16) are provided between the liquid outlet of the circulating water pump group (3) and the liquid inlet of the compressed air energy storage system (1), and a fourth control valve (17) is provided on each of the fourth branch pipes (15).

7. The circulating water cooling system suitable for a compressed air energy storage system according to claim 6, characterized in that: The second control valve (10) and the third control valve (14) are electric butterfly valves.

8. The circulating water cooling system suitable for a compressed air energy storage system according to claim 7, characterized in that: The fourth control valve (17) is a check valve.

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