A cooling tower applicable to a gas-liquid phase change carbon dioxide energy storage system

Abstract

The present invention discloses a cooling tower suitable for a gas-liquid phase change carbon dioxide energy storage system. An evaporation water recovery device including a recovery cylinder and a heat exchange assembly is provided in the cooling tower; the upper and lower ends of the recovery cylinder are open, the recovery cylinder is erected above the air outlet of the cooling tower body and there is a gap between its bottom end and the top surface of the cooling tower body, a water collecting tank is provided on the inner wall of the recovery cylinder, a ring-shaped water guide groove and a water inlet that are communicated with each other are provided on the top surface of the cooling tower body, the ring-shaped water guide groove surrounds the air outlet and is correspondingly located below the bottom edge of the recovery cylinder; the heat exchange assembly includes heat exchange tubes and a heat exchange grid, the heat exchange tubes are arranged on the recovery cylinder along the radial direction of the recovery cylinder, the heat exchange grid is rotatably connected to the heat exchange tubes, and the heat exchange grid is configured to be able to rotate based on the exhaust air pressure of the circulating fan. The solution of the present invention can efficiently recover the water evaporated by the cooling tower and can save a large amount of water resources for the gas-liquid phase change carbon dioxide energy storage system.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide energy storage, and particularly to a cooling tower applicable to a gas-liquid phase change carbon dioxide energy storage system. Background Art

[0002] During the operation of a carbon dioxide energy storage system, a large amount of heat is generated by the unit equipment therein. For example, bearings of rotating equipment such as compressors and turbines, and coils of generators will all generate a large amount of heat. Therefore, a cooling tower system needs to be configured in a carbon dioxide energy storage power station to cool and dissipate heat from the unit equipment and maintain the performance and reliability of the equipment. The cooling tower system passes low-temperature circulating water in the cooling tower into the heat exchanger of the unit equipment for heat exchange, takes away the heat generated by the unit equipment to reduce the temperature of the equipment, and the high-temperature circulating water after heat exchange returns to the cooling tower for cooling, and then is recycled.

[0003] Existing cooling towers mainly include a tower body, a water collecting pool arranged at the bottom of the tower body, and a circulating fan arranged at the top of the tower body. The circulating fan sucks air from the air inlet at the bottom of the tower body to make the air flow from bottom to top, while the high-temperature circulating water flows from top to bottom in the tower body. Heat exchange occurs between the high-temperature circulating water and the cold air in the tower body, and at the same time, the high-temperature circulating water is evaporated to dissipate heat into the atmosphere. Finally, the cooled circulating water falls into the water collecting pool. The high-temperature circulating water mainly dissipates heat and cools down through the evaporation of water in the tower body. Therefore, a large amount of evaporated water is lost in the cooling tower, and a large amount of circulating water needs to be supplemented, which not only causes waste of water resources but also increases production costs. In particular, since a carbon dioxide energy storage system is usually built in combination with wind power generation or photovoltaic power generation to utilize abandoned wind and photovoltaic power, and in areas rich in wind power generation or photovoltaic power generation resources, water resources are usually scarce. Therefore, for a cooling tower applied to a carbon dioxide energy storage system, how to reduce the evaporation loss of circulating water is particularly important. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a cooling tower applicable to a gas-liquid phase change carbon dioxide energy storage system, which solves the problems of how to recover the evaporated water of the cooling tower and reduce the evaporation loss of the circulating water of the carbon dioxide energy storage system so as to reduce the production cost.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A cooling tower applicable to a gas-liquid phase change carbon dioxide energy storage system, the cooling tower includes a cooling tower body and a water collecting pool connected to the bottom of the cooling tower body. An air outlet is opened on the top surface of the cooling tower body, and a circulating fan is arranged below the air outlet. An evaporated water recovery device is connected to the top surface of the cooling tower body. The evaporated water recovery device includes a recovery cylinder and a heat exchange component; wherein,

[0007] The upper and lower ends of the recovery cylinder body are open. The recovery cylinder body is erected above the exhaust port through a support structure member, and there is a gap between its bottom end and the top surface of the cooling tower body. A water collecting tank is provided on the inner wall of the recovery cylinder body. A ring-shaped water guiding groove and a water inlet are provided on the top surface of the cooling tower body and are interconnected. The ring-shaped water guiding groove surrounds the periphery of the exhaust port and is correspondingly located below the bottom edge of the recovery cylinder body;

[0008] The heat exchange assembly includes heat exchange tubes and heat exchange grids. The heat exchange tubes are radially arranged on the recovery cylinder body along the radial direction of the recovery cylinder body. The heat exchange tubes are connected to the water collecting tank through a cooling circulation assembly. The heat exchange grids are rotatably connected to the heat exchange tubes, and the heat exchange grids are configured to be able to rotate around the heat exchange tubes as the rotation axis based on the exhaust air pressure of the circulation fan.

[0009] In a specific solution, the heat exchange grid includes a rotation connection part and a condensation grid part. The rotation connection part is rotatably wrapped around the heat exchange tube, and the condensation grid part is vertically connected to the rotation connection part. The condensation grid part extends out from the opposite sides of the rotation connection part along the radial direction of the rotation connection part.

[0010] In a specific solution, both ends of the heat exchange tube are respectively connected to the side wall of the recovery cylinder body through rolling bearings; wherein, the outer ring of the rolling bearing is fixedly connected to the side wall of the recovery cylinder body, the inner ring of the rolling bearing is rotatably sleeved on the heat exchange tube, and both ends of the rotation connection part are respectively correspondingly connected to the inner ring of the rolling bearing.

[0011] In a specific solution, the heat exchange assembly includes more than two of the heat exchange grids, and more than two of the heat exchange grids are provided with a common rotation connection part.

[0012] In a specific solution, more than two of the heat exchange grids are arranged at equal intervals in the circumferential direction of the heat exchange tube.

[0013] In a specific solution, in the axial direction of the recovery cylinder body, the center of the heat exchange grid and the center of the circulation fan are concentric or eccentrically arranged.

[0014] In a specific solution, the cooling circulation assembly includes a water inlet pipe, a water return pipe and a circulation pump; the first end of the water inlet pipe is connected to the first end of the heat exchange tube from the outside of the recovery cylinder body, and the second end of the water inlet pipe is connected to the water collecting tank through the circulation pump; the first end of the water return pipe is connected to the second end of the heat exchange tube from the outside of the recovery cylinder body, and the second end of the water return pipe is connected to the water inlet.

[0015] In a specific embodiment, the water collecting tank spirally extends from the bottom end of the inner wall of the recovery cylinder to the top end of the inner wall of the recovery cylinder.

[0016] In a specific embodiment, the annular water guiding tank has opposite first and second position points, and the connection line between the first and second position points passes through the center point of the annular water guiding tank; wherein, the depth of the annular water guiding tank gradually increases along the counterclockwise direction and the clockwise direction respectively from the first position point to the second position point, and the annular water guiding tank communicates with the water inlet through a connecting groove at the second position point.

[0017] In a specific embodiment, the gas-liquid phase change carbon dioxide energy storage system includes a gas storage unit, an energy storage component, a condensation unit, a liquid storage unit, an evaporation unit, and an energy release component that are sequentially connected in a closed loop. The energy storage component is connected to the condensation unit through a first conveying pipeline, and the energy release component is connected to the gas storage unit through a second conveying pipeline;

[0018] Wherein, the first pipeline section of the first conveying pipeline and / or the second pipeline section of the second conveying pipeline are erected above the recovery cylinder, so that the water vapor discharged from above the recovery cylinder contacts the first pipeline section and / or the second pipeline section and undergoes a phase change to form water vapor.

[0019] The cooling tower applicable to the gas-liquid phase change carbon dioxide energy storage system provided by the embodiment of the present invention is provided with a recovery cylinder and a heat exchange component above the air outlet on the top surface of the cooling tower body. The low-temperature circulating water in the water collecting tank is introduced into the heat exchange component by the cooling circulation component for cooling. The water vapor discharged by the circulating fan through the air outlet condenses into water droplets after contacting the heat exchange grid in the recovery cylinder, and the heat exchange grid can rotate based on the exhaust air pressure of the circulating fan. Under the action of centrifugal force, the condensed water on the heat exchange grid is thrown out onto the inner wall of the recovery cylinder into the water collecting tank, and the condensed water finally flows into the cooling tower body through the water collecting tank and then falls into the water collecting tank below. Thus, the cooling tower provided by the present invention can efficiently recover the evaporated water, save a large amount of water resources, and also reduce the large amount of energy consumption generated by the need to supplement circulating water due to water evaporation. It is particularly applicable to the gas-liquid phase change carbon dioxide energy storage system, can save a large amount of water resources for the gas-liquid phase change carbon dioxide energy storage system, and can effectively solve the problem of too high operating costs of the carbon dioxide energy storage system due to lack of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the cooling tower in the embodiment of the present invention;

[0021] Figure 2It is a structural diagram of the top surface of the cooling tower body in the embodiment of the present invention;

[0022] Figure 3 It is a structural diagram of the water collection tank on the inner wall of the recovery cylinder in the embodiment of the present invention;

[0023] Figure 4 It is a top view of the recovery cylinder in the embodiment of the present invention;

[0024] Figure 5 It is a side view of the heat exchange component in the embodiment of the present invention;

[0025] Figure 6 It is a side view of the heat exchange component in another alternative embodiment of the present invention;

[0026] Figure 7 It is a structural diagram of the mutually connected part between the heat exchange component and the recovery cylinder in the embodiment of the present invention;

[0027] Figure 8 It is a structural block diagram of the gas-liquid phase change carbon dioxide energy storage system in the embodiment of the present invention;

[0028] Figure 9 It is a structural diagram in the embodiment of the present invention where part of the conveying pipeline is erected above the cooling tower. Detailed implementation manners

[0029] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings. Examples of these preferred implementation manners are illustrated in the accompanying drawings. The implementation manners of the present invention shown in the drawings and described according to the drawings are merely exemplary, and the present invention is not limited to these implementation manners.

[0030] It should be noted that in the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for exemplary illustration and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0031] Here, it also needs to be explained that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution of the present invention are shown in the accompanying drawings, while other details less related to the present invention are omitted.

[0032] An embodiment of the present invention first provides a cooling tower applicable to a gas-liquid phase change carbon dioxide energy storage system, which is mainly used for dissipating heat and cooling each unit device in the carbon dioxide energy storage system. As Figures 1 to 7 shown, the cooling tower 100 mainly includes a cooling tower body 1, a sump 2, and an evaporation water recovery device 3. The sump 2 is connected to the bottom of the cooling tower body 1, and the evaporation water recovery device 3 is connected to the top of the cooling tower body 1 through a support structure member 4.

[0033] Among them, referring to Figures 1 to 5 , an air outlet 11 is opened on the top surface 1a of the cooling tower body 1, and a circulation fan 12 is arranged below the air outlet 11 in the cooling tower body 1. The evaporation water recovery device 3 includes a recovery cylinder 31 and a heat exchange component 32. The upper and lower ends of the recovery cylinder 31 are open. The recovery cylinder 31 is erected above the air outlet 11 through a support structure member 4, and there is a gap 6 between its bottom end and the top surface of the cooling tower body 1. A water collecting groove 311 is opened on the inner wall of the recovery cylinder 31. Further, an annular water guide groove 13 and a water inlet 14 that communicate with each other are arranged on the top surface of the cooling tower body 1. The annular water guide groove 13 surrounds the periphery of the air outlet 11 and is correspondingly located below the bottom edge of the recovery cylinder 31.

[0034] Specifically, the heat exchange component 32 includes heat exchange tubes 321 and a heat exchange grid 322. The heat exchange tubes 321 are radially arranged through the recovery cylinder 31 along the radial direction of the recovery cylinder 31. The heat exchange tubes 321 are connected to the sump 2 through a cooling circulation component 5. The heat exchange grid 322 is rotatably connected to the heat exchange tubes 321, and the heat exchange grid 322 is configured to be able to rotate around the heat exchange tubes 321 based on the exhaust air pressure of the circulation fan 12.

[0035] It should be noted that, as Figure 1 shows, the heat exchange component 32 located inside the recovery cylinder 31 is shown in dotted lines. As Figure 3 shows, the water collecting groove 311 located on the inner wall of the recovery cylinder 31 is shown in dotted lines.

[0036] For the cooling tower 100 described above, its working process includes:

[0037] (1) The low-temperature circulating water in the sump 2 is transported to the gas-liquid phase change carbon dioxide energy storage system for heat exchange with the unit equipment. After the heat exchange and temperature rise, the high-temperature circulating water is introduced into the cooling tower body 1. The circulating fan 12 is started, and the high-temperature circulating water exchanges heat with the air in the cooling tower body 1 and cools down. The cooled low-temperature circulating water flows into the sump 2 below. The water vapor evaporated during the cooling process of the high-temperature circulating water is discharged from the air outlet 11 driven by the circulating fan 12 and enters the recovery cylinder 31.

[0038] (2) The cooling circulation assembly 5 passes the low-temperature circulating water in the sump 2 into the heat exchange tubes 321 of the heat exchange assembly 32 to reduce the temperature of the heat exchange tubes 321 and the heat exchange grid 322. The circulating water after heat exchange and temperature rise returns to the cooling tower body 1 through the cooling circulation assembly 5.

[0039] (3) The water vapor entering the recovery cylinder 31 condenses into water droplets after contacting the heat exchange grid 322. And the heat exchange grid 322 rotates with the heat exchange tube 321 as the rotation axis based on the exhaust air pressure of the circulating fan 12. Under the action of centrifugal force, the condensed water droplets on the heat exchange grid 322 are thrown out to the inner wall of the recovery cylinder 31.

[0040] (4) The water droplets on the inner wall of the recovery cylinder 31 are collected by the water collecting tank 311 and flow downward, flow into the annular water guide groove 13 from the lower edge of the recovery cylinder 31, and are finally recycled into the cooling tower body 1 through the water inlet 14.

[0041] Thus, for the cooling tower 100 as described above: First, by arranging the heat exchange assembly 32 in the recovery cylinder 31 and condensing the water vapor through the heat exchange assembly 32, the moisture evaporated from the cooling tower can be efficiently recovered. Second, the recovery cylinder 31 is erected above the air outlet 11 through the support structure member 4 and there is a gap 6 between its bottom end and the top surface of the cooling tower body 1. When the circulating fan 12 is turned on, based on Bernoulli's principle, the low-temperature air in the external environment of the equipment enters the recovery cylinder 31 through the gap 6, improving the condensation efficiency of the water vapor and enabling the water vapor to be more fully condensed and recovered. Further, the heat exchange grid 322 in the heat exchange assembly 32 rotates based on the exhaust air pressure of the circulating fan 12, eliminating the need to set up an additional power source, which can save system energy consumption. And based on Bernoulli's principle, during the rotation of the heat exchange grid 322, it can provide secondary power for the upward airflow of the circulating fan 12 of the cooling tower (equivalent to connecting a fan in series), thereby appropriately reducing the energy consumption of the circulating fan 12.

[0042] In this embodiment, as Figure 4 and Figure 5As shown, the heat exchange grid 322 includes a rotating connection part 3221 and a condensation grid part 3222. The rotating connection part 3221 is rotatably wrapped around the heat exchange tube 321. The condensation grid part 3222 is vertically connected to the rotating connection part 3221. The condensation grid part 3222 extends out from opposite sides of the rotating connection part 3221 along the radial direction of the rotating connection part 3221.

[0043] In some other embodiments, such as Figure 6 As shown, the heat exchange assembly 32 includes more than two of the heat exchange grids 322 ( Figure 6 Three heat exchange grids 322 are exemplarily shown in the figure). More than two of the heat exchange grids 322 are provided with a common rotating connection part 3221. The condensation grid parts 3222 in more than two of the heat exchange grids 322 are commonly connected to the common rotating connection part 3221. In a preferred solution, more than two of the heat exchange grids 322 are arranged at equal intervals in the circumferential direction of the heat exchange tube 321. By providing more than two of the heat exchange grids 322, sundries (such as leaves) can be prevented from falling into the lower collecting pool 2 through the air outlet 11. For example, the fallen sundries are blocked by the heat exchange grids 322 and accumulate on the heat exchange grids 322. When the circulation fan 12 is turned on, the sundries on the heat exchange grids 322 are blown out of the recycling cylinder 31.

[0044] As a preferred solution, in this embodiment, as Figure 7 shown, both ends of the heat exchange tube 321 are respectively connected to the side wall of the recycling cylinder 31 through rolling bearings 33. Among them, the outer ring of the rolling bearing 33 is fixedly connected to the side wall of the recycling cylinder 31, the inner ring of the rolling bearing 33 is rotatably sleeved on the heat exchange tube 321, and both ends of the rotating connection part 3221 are respectively correspondingly connected to the inner ring of the rolling bearing 33. By connecting the rotating connection part 3221 to the inner ring of the rolling bearing 33, the heat exchange grid 322 can rotate more smoothly relative to the heat exchange tube 321.

[0045] Among them, referring to Figure 2 and Figure 4 , in the axial direction of the recycling cylinder 31, the center of the heat exchange grid 322 and the center of the circulation fan 12 are concentrically or eccentrically arranged. Preferably, the centers of the two are eccentrically arranged, so that the wind pressure driven by the circulation fan 12 can better throw the condensed water droplets on the heat exchange grid 322 onto the inner wall of the recycling cylinder 31.

[0046] In this embodiment, as Figure 1As shown, the cooling cycle assembly 5 includes a water inlet pipe 51, a water return pipe 52, and a circulation pump 53. The first end of the water inlet pipe 51 is connected from the outside of the recovery cylinder 31 to the first end of the heat exchange tube 321, and the second end of the water inlet pipe 51 is connected to the sump 2 through the circulation pump 53. The first end of the water return pipe 52 is connected from the outside of the recovery cylinder 31 to the second end of the heat exchange tube 321, and the second end of the water return pipe 52 is connected to the water inlet 14.

[0047] As a preferred solution, in this embodiment, as Figure 3 shown, the water collecting tank 311 spirally extends from the bottom end of the inner wall of the recovery cylinder 31 to the top end of the inner wall of the recovery cylinder 31. The water collecting tank 311 is arranged in a spiral shape, which can better collect the water droplets thrown onto the inner wall of the recovery cylinder 31, and can prevent the water droplets from being blown by the circulation fan 12 and flowing upward along the inner wall of the recovery cylinder 31.

[0048] As a preferred solution, in this embodiment, as Figure 2 shown, the annular water guide groove 13 has opposite first position points 131 and second position points 132, and the connection line between the first position point 131 and the second position point 132 passes through the center point of the annular water guide groove 13. Among them, the depth of the annular water guide groove 13 gradually increases along the counterclockwise direction and the clockwise direction from the first position point 131 to the second position point 132, and the annular water guide groove 13 communicates with the water inlet 14 through the connection groove 15 at the second position point 132. That is, one end of the annular water guide groove 13 close to the water inlet 14 is relatively low and the end far from the water inlet 14 is relatively high, so that the condensed water flowing into the annular water guide groove 13 can be better introduced into the water inlet 14 and then recovered into the cooling tower body 1.

[0049] Based on the cooling tower provided in the above embodiment, by arranging a recovery cylinder and a heat exchange component above the air outlet of the top surface of the cooling tower body, the water evaporated by the cooling tower can be efficiently recovered, a large amount of water resources are saved, and a large amount of energy consumption generated by supplementing circulating water due to water evaporation is also reduced. It is particularly suitable for the gas-liquid phase change carbon dioxide energy storage system, can save a large amount of water resources for the gas-liquid phase change carbon dioxide energy storage system, and can effectively solve the problem of too high operating cost of the carbon dioxide energy storage system due to lack of water resources.

[0050] Furthermore, as Figure 8As shown, the gas-liquid phase-change carbon dioxide energy storage system described in this embodiment mainly includes a gas storage unit 200, an energy storage component 300, a condensing unit 400, a liquid storage unit 500, an evaporation unit 600 and an energy release component 700, which are connected in a closed loop in sequence. Among them, the gas storage unit 200 is used to store gaseous carbon dioxide at normal pressure, and the liquid storage unit 500 is used to store liquid carbon dioxide. The gaseous carbon dioxide flowing out of the gas storage unit 200 is compressed and cooled by the energy storage component 300 through heat exchange, and then condensed and liquefied by the condensing unit 400 and flows into the liquid storage unit 500 for storage, completing energy storage in this process. The liquid carbon dioxide output from the liquid storage unit 500 is evaporated and gasified by the evaporating unit 600, and then the energy is released by the energy release component 700 and converted into gaseous carbon dioxide at normal pressure and flows into the gas storage unit 200 for storage, completing energy release and application in this process. Typically, the energy storage component 300 converts energy into compressed energy and thermal energy for storage during off-peak periods or when wind and solar power is abandoned; during peak periods, the energy release component 700 releases the stored energy and converts it into electrical energy for use. Figure 8 As shown, the gas-liquid phase-change carbon dioxide energy storage system is connected to the cooling tower 100 provided in the aforementioned embodiment. The cooling tower 100 is used to dissipate heat and cool the various units of equipment in the gas-liquid phase-change carbon dioxide energy storage system (e.g., the energy storage component 300 and the energy release component 700, etc.). Typically, the gas-liquid phase-change carbon dioxide energy storage system is provided with an in-plant heat exchanger (not shown in the drawings). The in-plant heat exchanger is used to collect heat generated by the various units of equipment during operation. The cooling tower 100 is connected to the in-plant heat exchanger. The cooling tower 100 injects low-temperature circulating water into the in-plant heat exchanger for heat exchange and removal, thereby achieving heat dissipation and cooling of the various units of equipment in the gas-liquid phase-change carbon dioxide energy storage system.

[0051] As a preferred solution, in this embodiment, refer to Figure 8 and Figure 9 , the energy storage component 300 is connected to the condensing unit 400 via a first delivery pipe 301, and the energy release component 700 is connected to the gas storage unit 200 via a second delivery pipe 701. The first pipe section 301a of the first delivery pipe 301 and / or the second pipe section 701a of the second delivery pipe 701 are installed above the recovery cylinder 31 of the cooling tower 100, so that the water vapor discharged from the top of the recovery cylinder 31 contacts the first pipe section 301a and / or the second pipe section 701a and undergoes phase change to form water vapor. Figure 9 As shown, in this embodiment, the first pipe section 301a and the second pipe section 701a are arranged above the recovery cylinder 31 in a crisscross manner. Figure 9The first pipeline section 301a described is erected in a direction parallel to the view plane, while the second pipeline section 701a is erected in a direction perpendicular to the view plane. In some other embodiments, it is also possible to erect only the first pipeline section 301a or the second pipeline section 701a above the recovery cylinder 31.

[0052] In the gas-liquid phase change carbon dioxide energy storage system: The carbon dioxide gas compressed and cooled by heat exchange in the energy storage component 300 usually still has a relatively high temperature. This part of the carbon dioxide gas is input into the condensation unit 400 through the first conveying pipeline 301 for condensation and liquefaction. If the temperature of the carbon dioxide gas in the first conveying pipeline 301 can be reduced, the liquefaction efficiency of the condensation unit 400 can be improved; The carbon dioxide gas after expanding and doing work in the energy release component 700 usually still has a relatively high temperature. This part of the carbon dioxide gas is input into the gas storage unit 200 through the second conveying pipeline 701 for storage. If the temperature of the carbon dioxide gas in the second conveying pipeline 701 can be reduced, it is more beneficial for the gas storage unit 200 to store.

[0053] In the cooling tower 100, although the evaporation water recovery device 3 is provided to recover the evaporated water, the effect of 100% recovery cannot be achieved, and a part of the water vapor will still escape from above the recovery cylinder 31. In the solution of this embodiment, the first pipeline section 301a of the first conveying pipeline 301 and the second pipeline section 701a of the second conveying pipeline 701 are erected above the recovery cylinder 31. The water vapor escaping from above the recovery cylinder 31 contacts the relatively hot first pipeline section 301a and the second pipeline section 701a and undergoes gasification phase change, turning into water vapor. The water vapor can absorb a large amount of heat during the phase change process of converting into water vapor, which can cool the first pipeline section 301a and the second pipeline section 701a. Thus, the temperature of the carbon dioxide gas in the first conveying pipeline 301 can be reduced to improve the liquefaction efficiency of the condensation unit 400, and the temperature of the carbon dioxide gas in the second conveying pipeline 701 can also be reduced, making it more beneficial for the gas storage unit 200 to store.

[0054] It should be noted that the water vapor mentioned in the embodiments of this application refers to the gaseous form of water, and the steam refers to a mixture containing tiny water droplets in the water vapor. That is, the steam escaping from above the recovery cylinder 31 is a gas-liquid mixture, which absorbs heat and undergoes gasification phase change after contacting the relatively hot first pipeline section 301a and / or the second pipeline section 701a, turning into water vapor in gaseous form.

[0055] The above are only specific embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A cooling tower applicable to a gas-liquid phase change carbon dioxide energy storage system, the cooling tower comprising a cooling tower body and a sump connected to the bottom of the cooling tower body, wherein an air outlet is formed on the top surface of the cooling tower body and a circulation fan is arranged below the air outlet, characterized in that, An evaporation water recovery device is connected to the top surface of the cooling tower body. The evaporation water recovery device includes a recovery cylinder and a heat exchange component. Among them, The upper and lower ends of the recovery cylinder are open. The recovery cylinder is erected above the air outlet through a support structure member. There is a gap between the bottom end of the recovery cylinder and the top surface of the cooling tower body. A water collection tank is formed on the inner wall of the recovery cylinder. An annular water guide groove and a water inlet are arranged on the top surface of the cooling tower body and are communicated with each other. The annular water guide groove surrounds the air outlet and is correspondingly located below the bottom edge of the recovery cylinder. The heat exchange component includes heat exchange tubes and heat exchange grids. The heat exchange tubes are radially arranged on the recovery cylinder along the radial direction of the recovery cylinder. The heat exchange tubes are connected to the water collection tank through a cooling circulation component. The heat exchange grids are rotatably connected to the heat exchange tubes. The heat exchange grids are configured to rotate around the heat exchange tubes as the rotation axis based on the exhaust air pressure of the circulation fan. The heat exchange grids include a rotation connection part and a condensation grid part. The rotation connection part is rotatably sleeved on the heat exchange tubes. The condensation grid part is vertically connected to the rotation connection part. The condensation grid part extends from the opposite sides of the rotation connection part along the radial direction of the rotation connection part. Among them, the gas-liquid phase change carbon dioxide energy storage system includes a gas storage unit, an energy storage component, a condensation unit, a liquid storage unit, an evaporation unit and an energy release component that are connected in a closed loop in sequence. The energy storage component is connected to the condensation unit through a first pipeline. The energy release component is connected to the gas storage unit through a second pipeline. The first pipeline segment of the first pipeline and / or the second pipeline segment of the second pipeline are erected above the recovery cylinder, so that the water vapor discharged from above the recovery cylinder contacts the first pipeline segment and / or the second pipeline segment and undergoes a phase change to form water vapor.

2. The cooling tower according to claim 1, wherein, Both ends of the heat exchange tubes are respectively connected to the side wall of the recovery cylinder through rolling bearings. Among them, the outer ring of the rolling bearing is fixedly connected to the side wall of the recovery cylinder, and the inner ring of the rolling bearing is rotatably sleeved on the heat exchange tubes. Both ends of the rotation connection part are respectively connected to the inner ring of the rolling bearing.

3. The cooling tower according to claim 1, wherein The heat exchange component includes two or more of the heat exchange grids, and two or more of the heat exchange grids are provided with a common rotation connection part.

4. The cooling tower according to claim 3, characterized in that, Two or more of the heat exchange grids are arranged at equal intervals in the circumferential direction of the heat exchange tubes.

5. The cooling tower according to claim 1, characterized in that, In the axial direction of the recovery cylinder, the center of the heat exchange grid and the center of the circulation fan are concentric or eccentrically arranged.

6. The cooling tower according to claim 1, wherein, The cooling circulation component includes a water inlet pipeline, a water return pipeline and a circulation pump. The first end of the water inlet pipeline is connected to the first end of the heat exchange tube from the outside of the recovery cylinder, and the second end of the water inlet pipeline is connected to the water collection tank through the circulation pump. The first end of the water return pipeline is connected to the second end of the heat exchange tube from the outside of the recovery cylinder, and the second end of the water return pipeline is connected to the water inlet.

7. The cooling tower according to claim 1, characterized in that, The water collecting tank spirally extends from the bottom end of the inner wall of the recovery cylinder to the top end of the inner wall of the recovery cylinder.

8. The cooling tower according to claim 1, wherein, The annular water guide tank has opposite first and second position points, and the connection line between the first position point and the second position point passes through the center point of the annular water guide tank; wherein, the depth of the annular water guide tank gradually increases respectively in the counterclockwise direction and the clockwise direction from the first position point to the second position point, and the annular water guide tank communicates with the water inlet through a connection groove at the second position point.

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