Nuclear power seawater cooling tower

Abstract

The application provides a nuclear power seawater cooling tower, and relates to the technical field of cooling towers. The nuclear power seawater cooling tower comprises a tower body, an air blower, a spraying part, a water spraying filler layer, a condensation utilization assembly, a cold air conveying pipe, a recovery pipe, a recovery box, a transfer assembly, the tower body is in the shape of a tower and is used for providing a cooling space and cooling air, the air blower is arranged at the top of the tower body and is used for discharging airflow in the tower body, the spraying part is arranged at the middle of the tower body and is used for spraying circulating water, the water spraying filler layer is arranged in the tower body and is located below the spraying part, and the condensation utilization assembly is arranged in the tower body and is located above the spraying part and is used for condensing saturated hot and humid air and gathering the saturated hot and humid air at the center. The condensation utilization assembly and the cold air conveying pipe are arranged, so that the saturated hot and humid air can be condensed and gathered at the center, the condensate water is prevented from being excessively dispersed and from corroding parts, and the service life of the parts is prolonged.

Description

Technical Field

[0001] This invention relates to the field of cooling tower technology, specifically to a nuclear power plant seawater cooling tower. Background Technology

[0002] The function of a cooling tower is to exchange heat between circulating water carrying waste heat and the air inside the tower, transferring the heat of the water to the air and dissipating it into the atmosphere, thereby cooling the circulating water.

[0003] In related technologies, such as the water-saving and environmentally friendly cooling tower with announcement number CN102538503B, there is a tower body, and a water collector, a water distributor, a packing layer, a water storage tank, and an air inlet on the side wall of the tower body below the packing layer. The tower body is equipped with an air mixing condenser, and a water collection tank is provided above the water collector at the lower part of the air mixing condenser. The side wall of the air mixing condenser is provided with an air inlet.

[0004] The cooling towers described above can condense and recover the evaporating water during the cooling process. However, the condensate is not concentrated enough, and condensate is easily left in the collection tank. The condensate drainage rate is not high, which can easily provide nutrients for the growth of microorganisms and shorten the service life of components. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a nuclear power plant seawater cooling tower that solves the problem of low condensate drainage rate, which easily provides nutrients for microbial growth.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a nuclear power plant seawater cooling tower, comprising: The tower body, which is tower-shaped, is used to provide cooling space and cooling air. An exhaust fan, located at the top of the tower, is used to exhaust airflow from inside the tower. A spraying element, located in the middle of the tower body, is used to spray circulating water; A water-spraying packing layer is disposed inside the tower body and located below the spray elements; A condensation utilization component is disposed inside the tower and above the spray element, and is used to condense saturated hot and humid air and collect it at the center. A cooling air supply pipe, which is used to input an external cooling air source into the condensation utilization component; A recovery pipe is located below the condensation utilization component and is used to recover condensate. A recovery box is located at one end of the recovery pipe that extends into the tower body and is used to recover the condensate from the condensation utilization component. A transfer component, located at the center of the recovery box, is used to intermittently receive condensate and periodically provide a percussion force. Through the condensation utilization component and cooling air pipe, saturated hot and humid air can be condensed and concentrated at the center, preventing excessive dispersion of condensate and thus avoiding corrosion of components and extending their service life. The transfer component, recovery box, and recovery pipe, combined with the concentrated water flow, can intermittently receive condensate and generate vibration force, improving the condensate drainage rate and preventing condensate from remaining on components and providing nutrients for excessive microbial growth, further extending component life. This design is suitable for seawater cooling in nuclear power plants.

[0007] Preferably, the lower part of the tower body is provided with a cooling air vent, which is located below the water-spraying packing layer, and the bottom of the tower body is provided with a water collection pool.

[0008] Preferably, the condensation utilization component includes a central tube fixedly installed inside the tower body. The lower end of the central tube is provided with a gathering tip. The circumference of the central tube is provided with condensation blades arranged spirally from bottom to top. An intercepting plate is uniformly fixedly connected between the top condensation blade and the bottom condensation blade. The outer ring of the condensation blade is provided with an outer high part, the inner ring of the condensation blade is provided with an inner low part, the condensation blade is provided with a cold air chamber, the lower surface of the condensation blade is provided with a guide groove, the central tube is interconnected with multiple condensation blades, and the central tube is connected to an external water tank through a pipe.

[0009] Preferably, the cooling gas pipe is connected to the top of the central pipe, and the cooling gas pipe is connected to an external cooling gas source.

[0010] Preferably, the transfer assembly includes a rotating plate rotatably mounted on the inner wall of the recycling box, a striking ring fixedly connected to the top of the rotating plate, a receiving shell fixedly connected to the lower end of the rotating plate, the receiving shell being located directly below the gathering tip, and the striking ring being able to strike the gathering tip.

[0011] Preferably, a distance is reserved between the condenser blade and the inner wall of the tower body, and a blocking ring is fixedly connected inside the tower body, the blocking ring being located between the condenser blade and the spray element.

[0012] Preferably, the shape of the cooling air vent is either a square or an X-shape.

[0013] Preferably, the receiving shell is hemispherical in shape.

[0014] This invention provides a seawater cooling tower for nuclear power plants. It has the following beneficial effects: 1. The present invention, through the condensation utilization component and the cooling air pipe, can condense saturated hot and humid air and collect it at the center, avoiding excessive dispersion of condensate water, which would cause corrosion of the components and improve the service life of the components.

[0015] 2. The present invention, through the setting of transfer components, recycling boxes, and recycling pipes, utilizes the collected water flow to cooperate with the transfer components, which can intermittently receive condensate and generate vibration force, improve the condensate drainage rate, prevent condensate from remaining on the components and providing nutrients for the excessive growth of microorganisms, and improve the service life of the components. It is suitable for use in seawater cooling of nuclear power plants. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the overall internal structure of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the central tube portion of the present invention; Figure 5 This is a schematic diagram of the condensation utilization component in this invention; Figure 6 This is a schematic diagram of the condenser blade in this invention; Figure 7 This is a schematic diagram of the condenser blade from a lower perspective in this invention; Figure 8 This is a schematic diagram of the transfer component of the present invention.

[0017] The components include: 1. Tower body; 2. Exhaust fan; 3. Condensation utilization component; 4. Spray component; 5. Water spray packing layer; 6. Cooling air conveying pipe; 7. Recovery pipe; 8. Transfer component; 9. Recovery box; 101. Cooling air outlet; 102. Baffle ring; 301. Condensation blade; 302. Interception plate; 303. Central pipe; 3031. Gathering tip; 3011. Outer high part; 3012. Inner low part; 3013. Cooling air cavity; 3014. Guide groove; 801. Rotating plate; 802. Receiver shell; 803. Striking ring. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1-8As shown, an embodiment of the present invention provides a nuclear power plant seawater cooling tower, comprising: refer to Figure 1 , Figure 2 The tower body 1 is tower-shaped and is used to provide cooling space and cooling air. The lower part of the tower body 1 is provided with a cooling air vent 101, which is located below the water spray packing layer 5. The bottom of the tower body 1 is provided with a water collection pool. The cooling air vent 101 can be either a square or an X-shaped shape. The cooling vent 101 is used for the entry of external cold air; the water collection pool is used to collect the circulating water after cooling; the X-shaped cooling vent 101 can provide a certain lateral support for the tower body 1 and improve the stability of the tower body 1.

[0020] Exhaust fan 2 is located at the top of tower body 1 and is used to exhaust the airflow inside tower body 1. refer to Figure 1 , Figure 2 Sprayer 4 is located in the middle of the tower body 1 and is used to spray circulating water. The spray unit 4 consists of a spray pipe and a nozzle, and is capable of spraying circulating water that needs to be cooled.

[0021] Water spraying packing layer 5 is located inside the tower body 1 and below the spraying element 4; refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 The condensation utilization component 3 is located inside the tower body 1 and above the spray component 4. It is used to condense saturated hot and humid air and collect it at the center. The condensation utilization component 3 includes a central pipe 303 fixedly installed inside the tower body 1. The lower end of the central pipe 303 is provided with a gathering tip 3031. The circumferential surface of the central pipe 303 is provided with condensation blades 301 arranged spirally from bottom to top. The top condensation blades 301 and the bottom condensation blades 301 are uniformly fixedly connected with intercepting plates 302. The outer ring of the condensation blades 301 is provided with an outer high part 3011, the inner ring of the condensation blades 301 is provided with an inner low part 3012, the condensation blades 301 are provided with a cold air chamber 3013, and the lower surface of the condensation blades 301 is provided with a guide groove 3014. The central pipe 303 is interconnected with multiple condensation blades 301. The central pipe 303 is connected to an external water tank through a pipe. The saturated hot and humid air generated during the spraying process will flow upward under the action of the induced draft fan 2. After encountering the condenser blade 301, the saturated hot and humid air will be pre-cooled and liquefied under the action of the cold air in the cold air chamber 3013. Under the action of gravity, it will flow from the outer high part 3011 to the inner low part 3012, and then flow downward along the outer surface of the central tube 303 and converge at the gathering tip 3031. Since there are gaps between adjacent condenser blades 301 and between adjacent interceptor plates 302, the normal upward movement and discharge of the airflow will not be affected. There are overlapping parts between adjacent condenser blades 301, so it can be ensured that the rising airflow can fully and completely contact the lower surface of the condenser blade 301. The heated air in the central pipe 303 is then introduced into the external water tank (not shown) through a pipe (not shown), which can heat the water in the tank and realize the function of recovering heat from the steam. In order to control the outflow of air, a valve can be installed on the pipe.

[0022] refer to Figure 2 A distance is reserved between the condenser blade 301 and the inner wall of the tower body 1. A blocking ring 102 is fixedly connected inside the tower body 1. The blocking ring 102 is located between the condenser blade 301 and the spray element 4. The baffle ring 102 can shrink the internal space of the tower body 1, so that the airflow can converge towards the center, ensuring that the rising saturated hot and humid air can contact the condensation utilization component 3. The distance reserved between the condenser blade 301 and the inner wall of the tower body 1 can be used for the upward discharge of the condensed airflow.

[0023] Cooling pipe 6 is used to input external cooling air source into condensation utilization component 3; cooling pipe 6 is interconnected with the top of central pipe 303 and external cooling air source. Recovery pipe 7 is located below the condensation utilization component 3 and is used to recover condensate; The recovery box 9 is located at one end of the recovery pipe 7 that extends into the tower body 1, and is used to recover the condensate of the condensation utilization component 3. refer to Figure 2 , Figure 3 , Figure 8 The transfer component 8 is located at the center of the recycling box 9 and is used to intermittently receive condensate and periodically provide a knocking force. The transfer component 8 includes a rotating plate 801 that is rotatably mounted on the inner wall of the recycling box 9. A knocking ring 803 is fixedly connected to the top of the rotating plate 801, and a receiving shell 802 is fixedly connected to the lower end of the rotating plate 801. The receiving shell 802 is located directly below the gathering tip 3031, and the knocking ring 803 can knock the gathering tip 3031. The receiving shell 802 is hemispherical in shape. During the transfer operation, initially, the weight of the striking ring 803 is greater than that of the receiving shell 802. The receiving shell 802 covers the collecting tip 3031 and is in a horizontal position. Water flowing from the collecting tip 3031 first falls into the receiving shell 802, increasing its weight and overcoming the weight of the striking ring 803. The rotating plate 801 rotates around its axis, and the striking ring 803 strikes the collecting tip 3031. During rotation, the receiving shell 802 shifts away from the collecting tip 3031 and tilts, causing the water inside the receiving shell 802 to drain out. As the volume decreases, the striking ring 803 will again drive the receiving shell 802 to cover the gathering tip 3031. Depending on the change in the position of the receiving shell 802, the striking ring 803 can reciprocate to strike the gathering tip 3031. The gathering tip 3031 will vibrate, making it easier for water droplets to gather into a water flow, so that the water droplets on the central tube 303 can be drained, avoiding the excessive growth of microorganisms on the central tube 303. Some specific bacteria, such as sulfate-reducing bacteria, produce highly corrosive substances such as hydrogen sulfide through their metabolism, which directly corrodes the metal and causes partial damage to the central tube 303, thereby improving the service life of the components and making it suitable for seawater cooling in nuclear power plants.

[0024] Working principle: Spraying component 4 sprays circulating water. After the circulating seawater is cooled in the water spraying packing layer 5, it will form saturated hot and humid air. The saturated hot and humid air generated during the spraying process will flow from bottom to top under the action of the induced draft fan 2. After encountering the condenser blade 301, under the action of the cold air in the cold air chamber 3013, the saturated hot and humid air is pre-cooled, releases heat and liquefies. Under the action of gravity, it flows from the outer high part 3011 to the inner low part 3012, and then flows down along the outer surface of the central tube 303 and converges at the gathering tip 3031. The weight of the striking ring 803 is greater than that of the receiving shell 802, causing the receiving shell 802 to cover the collecting tip 3031. The receiving shell 802 is in a horizontal position, and the water flowing from the collecting tip 3031 will first fall into the receiving shell 802. The increased weight of the receiving shell 802 overcomes the weight of the striking ring 803, causing the rotating plate 801 to rotate around its axis. The striking ring 803 will strike the collecting tip 3031. During this rotation, the receiving shell 802 will deviate from the collecting tip 3031 and be in a tilted state. The water inside the receiving shell 802 will be discharged, reducing the weight of the receiving shell 802. The striking ring 803 will then move the receiving shell 802 to cover the gathering tip 3031 again. Depending on the change in the position of the receiving shell 802, the striking ring 803 can be moved back and forth to strike the gathering tip 3031. The gathering tip 3031 will vibrate, making it easier for water droplets to gather into a water flow, so that the water droplets on the central tube 303 can be drained, preventing the excessive growth of microorganisms on the central tube 303, improving the service life of components, and making it suitable for seawater cooling in nuclear power plants.

[0025] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A nuclear power plant seawater cooling tower, characterized in that, include: The tower body (1) is tower-shaped and is used to provide cooling space and cooling air; The induced draft fan (2) is located at the top of the tower body (1) and is used to discharge the airflow inside the tower body (1); Sprayer (4), the sprayer (4) is located in the middle of the tower body (1) and is used to spray circulating water; Water spraying packing layer (5), the water spraying packing layer (5) is located inside the tower body (1) and below the spraying component (4); The condensation utilization component (3) is located inside the tower body (1) and above the spray component (4) for condensing saturated hot and humid air and collecting it at the center. Cooling pipe (6), the cooling pipe (6) is used to input an external cooling source into the condensation utilization component (3); A recovery pipe (7) is located below the condensation utilization assembly (3) and is used to recover condensate; The recycling box (9) is located at one end of the recycling pipe (7) that extends into the tower body (1) and is used to recycle the condensate of the condensation utilization component (3). The transfer component (8) is located at the center of the recycling box (9) and is used to intermittently receive condensate and periodically provide knocking force.

2. A nuclear power plant seawater cooling tower according to claim 1, characterized in that: The lower part of the tower body (1) is provided with a cooling air vent (101), which is located below the water spray packing layer (5). The bottom of the tower body (1) is provided with a water collection pool.

3. A nuclear power plant seawater cooling tower according to claim 1, characterized in that: The condensation utilization component (3) includes a central tube (303) fixedly installed inside the tower body (1). The lower end of the central tube (303) is provided with a gathering tip (3031). The circumferential surface of the central tube (303) is provided with condensation blades (301) arranged spirally from bottom to top. The top condensation blade (301) and the bottom condensation blade (301) are uniformly fixedly connected with intercepting plates (302). The outer ring of the condensation blade (301) is provided with an outer high part (3011). The inner ring of the condensation blade (301) is provided with an inner low part (3012). The condensation blade (301) is provided with a cold air chamber (3013). The lower surface of the condensation blade (301) is provided with a guide groove (3014). The central tube (303) is interconnected with multiple condensation blades (301). The central tube (303) is connected to an external water tank through a pipe.

4. A nuclear power plant seawater cooling tower according to claim 3, characterized in that: The cooling air pipe (6) is connected to the top of the central pipe (303), and the cooling air pipe (6) is connected to an external cooling air source.

5. A nuclear power plant seawater cooling tower according to claim 3, characterized in that: The transfer assembly (8) includes a rotating plate (801) rotatably mounted on the inner wall of the recycling box (9). A striking ring (803) is fixedly connected to the top of the rotating plate (801), and a receiving shell (802) is fixedly connected to the lower end of the rotating plate (801). The receiving shell (802) is located directly below the gathering tip (3031), and the striking ring (803) can strike the gathering tip (3031).

6. A nuclear power plant seawater cooling tower according to claim 3, characterized in that: A distance is reserved between the condenser blade (301) and the inner wall of the tower body (1). A blocking ring (102) is fixedly connected inside the tower body (1). The blocking ring (102) is located between the condenser blade (301) and the spray element (4).

7. A nuclear power plant seawater cooling tower according to claim 2, characterized in that: The cooling vent (101) can be either square or X-shaped.

8. A nuclear power plant seawater cooling tower according to claim 5, characterized in that: The receiving shell (802) is hemispherical in shape.

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