Combined dry and wet indirect cooling tower

Abstract

This utility model discloses a combined wet and dry indirect cooling tower, belonging to the field of cooling tower technology. Specifically, it relates to a combined wet and dry indirect cooling tower, including: a tower body, a baffle assembly, a fan, a water tank, a water collector, spray heads, a first heat exchange assembly, water distribution packing, and a second heat exchange assembly. This utility model can provide two cooling methods depending on the seasonal temperature. In summer, the first baffle is closed and the second baffle is opened, which can reduce the amount of wet-bulb air entering the coil and the indirect heat exchanger, thereby improving heat exchange and lowering the outlet water temperature. In winter and spring, the second baffle is closed and the first baffle is opened, so that the water and air do not come into contact, there is no evaporation, and water consumption is greatly reduced. Thus, this utility model can improve the applicability and practicality of the cooling tower, thereby solving problems such as high approach temperature, high water consumption, and white mist in cooling towers.

Description

Technical Field

[0001] This utility model discloses an indirect cooling tower, belonging to the field of cooling tower technology, specifically relating to a dry-wet combined indirect cooling tower. Background Technology

[0002] Dry-wet combined cooling principle: The core equipment of a dry-wet combined circulating cooling water system is a combined air cooler. A combined air cooler is a device that combines water cooling and air cooling.

[0003] When the temperature is high, both the fan and the spray water pump operate simultaneously. The spray water pump delivers spray water to the water distribution system above the heat exchange tubes. The spray water is sprayed downwards onto the heat exchange tubes, forming a uniform water film on the outside of the tubes. This water film absorbs heat from inside the tubes and evaporates into the air. The latent heat of water vaporization greatly exceeds the sensible heat of water heating, thus significantly enhancing the entire heat transfer process and reducing the heat exchange area. As the vaporized water enters the air, it warms, humidifies, and increases the enthalpy of the air. The air passes through a demister to remove entrained water droplets before being discharged into the atmosphere through the finned tubes. The spray water volume is greater than the amount of vaporized water, and most of the spray water falls back into the water tank for recycling. The spray water itself is cooled by the air during its descent, eliminating the need for secondary cooling. As the temperature decreases, the number of fans and spray pumps operating is reduced, or the fan speed is reduced via frequency conversion to adjust the heat exchange and maintain a stable outlet water temperature. Through the heat exchange design, the spray water can be stopped at low temperatures. At this point, the combined air cooler is equivalent to an induced draft dry air cooler. When the ambient temperature is lower than the set shut-off temperature, water spraying is unnecessary, significantly saving water consumption. Current problems include high cost, high energy consumption, significant pipe losses, easy scaling on the fins, and high maintenance costs. Utility Model Content

[0004] Purpose of the utility model: To provide a combined dry and wet indirect cooling tower to solve the problems mentioned above.

[0005] Technical solution: A combined dry and wet indirect cooling tower, the indirect cooling tower comprising: a tower body, a baffle assembly, a fan, a water tank, a water collector, a spray head, a first heat exchange assembly, a water distribution packing, and a second heat exchange assembly; The fan is fixedly installed at the top of the tower body and connected to the interior of the tower body. The water tank is fixedly installed at the bottom of the tower body. The spray head is installed inside the tower body. The water collector is installed inside the tower body and located between the fan and the spray head. The first heat exchange component and the second heat exchange component are installed from top to bottom inside the tower body and located between the spray head and the water tank. The water distribution packing is installed between the first heat exchange component and the second heat exchange component. The wind baffle assembly is installed inside the tower body and connected to the first heat exchange component and the second heat exchange component.

[0006] In a further embodiment, the wind deflector assembly includes: a first wind deflector, a second wind deflector, a pulley, and a zipline; The first wind baffle and the second wind baffle are installed on one side of the tower body. The first wind baffle is located on the upper side of the first heat exchange component, and the second wind baffle is located on the upper side of the second heat exchange component. One end of the sliding cable is connected to the first wind baffle and the second wind baffle and passes through the pulley. The sliding cable and the pulley are used to switch the first wind baffle and the second wind baffle.

[0007] In a further embodiment, the first heat exchange component is composed of a first indirect heat exchanger.

[0008] In a further embodiment, the second heat exchange assembly is composed of either a cooling coil or a second indirect heat exchanger.

[0009] In a further embodiment, the first and second wall-mounted heat exchangers adopt a dual-channel structure, which consists of horizontal and vertical air ducts inside.

[0010] In a further embodiment, louvers are provided between the second baffle plate and the first heat exchange component and the water distribution packing.

[0011] In a further embodiment, when the second heat exchange component is composed of a cooling coil, the water tank and the spray head are connected by a spray pump and a pipe. When the second heat exchange component is composed of a second wall-mounted heat exchanger, the air inlet of the second wall-mounted heat exchanger is provided with louvers.

[0012] In a further embodiment, the tower body is provided with an inspection door.

[0013] In a further embodiment, the wind deflector assembly is composed of louvers.

[0014] Beneficial effects: This invention allows for two cooling methods depending on seasonal temperature. In summer, the first baffle is closed and the second baffle is opened, which reduces the amount of wet-bulb air entering the coil and the indirect heat exchanger, thereby improving heat exchange and lowering the outlet water temperature. In winter and spring, the second baffle is closed and the first baffle is opened, preventing water and air from contacting each other and eliminating evaporation, thus significantly reducing water consumption. Therefore, this invention improves the applicability and practicality of the cooling tower, solving problems such as high cost, high energy consumption, large pipe losses, easy scaling of fins, and high maintenance costs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of Example 1.

[0016] Figure 2 This is a schematic diagram of the structure of Example 2.

[0017] Attached reference numerals: 1. Tower body; 2. Fan; 3. Water tank; 4. Water collector; 5. Spray head; 6. Water distribution packing; 7. First wind baffle; 8. Second wind baffle; 9. Pulley; 10. Cable; 11. First inter-wall heat exchanger; 12. Cooling coil; 13. Second inter-wall heat exchanger; 14. Louver; 15. Inspection door; 16. Spray pump. Detailed Implementation

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

[0019] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0021] A combined dry and wet indirect cooling tower includes: a tower body 1, a baffle plate assembly, a fan 2, a water tank 3, a water collector 4, a spray head 5, a first heat exchange assembly, a water distribution packing 6, and a second heat exchange assembly. In one embodiment, such as Figure 1 and Figure 2As shown, the fan 2 is fixedly installed at the top of the tower body 1 and connected to the interior of the tower body 1; the water tank 3 is fixedly installed at the bottom of the tower body 1; the spray head 5 is installed inside the tower body 1; the water collector 4 is installed inside the tower body 1 and located between the fan 2 and the spray head 5; the first heat exchange component and the second heat exchange component are installed from top to bottom inside the tower body 1 and located between the spray head 5 and the water tank 3; the water distribution packing 6 is installed between the first heat exchange component and the second heat exchange component; and the wind baffle assembly is installed inside the tower body 1 and connected to the first heat exchange component and the second heat exchange component.

[0022] In one embodiment, such as Figure 1 and Figure 2 As shown, the wind deflector assembly includes: a first wind deflector 7, a second wind deflector 8, a pulley 9, and a zipline 10; The first wind baffle 7 and the second wind baffle 8 are installed on one side of the tower body 1. The first wind baffle 7 is located on the upper side of the first heat exchange component, and the second wind baffle 8 is located on the upper side of the second heat exchange component. One end of the sliding cable 10 is connected to the first wind baffle 7 and the second wind baffle 8 and passes through the pulley 9. The sliding cable 10 and the pulley 9 are used to switch the first wind baffle 7 and the second wind baffle 8 on and off.

[0023] In one embodiment, such as Figure 1 and Figure 2 As shown, the first heat exchange component is composed of a first indirect heat exchanger 11.

[0024] In one embodiment, such as Figure 1 and Figure 2 As shown, the second heat exchange assembly is composed of either a cooling coil 12 or a second indirect heat exchanger 13.

[0025] In one embodiment, such as Figure 1 and Figure 2 As shown, the first wall-mounted heat exchanger 11 and the second wall-mounted heat exchanger 13 adopt a dual-channel structure, which consists of horizontal air ducts and vertical air ducts inside.

[0026] In one embodiment, such as Figure 1 and Figure 2 As shown, a louver 14 is provided between the second wind baffle 8 and the first heat exchange component and the water distribution packing 6.

[0027] In one embodiment, such as Figure 1 and Figure 2 As shown, the tower body 1 is equipped with an inspection door 15.

[0028] In one embodiment, the wind deflector assembly may also employ louvers to control the direction of airflow.

[0029] Example 1: like Figure 1 As shown, when the second heat exchange component is composed of a cooling coil 12, the water tank 3 and the spray head 5 are connected by a spray pump 16 and a pipe. The working process in this embodiment is as follows: Fan 2 is turned on, spray head 5 is turned on, and the medium to be cooled is introduced through the water inlet pipe of cooling coil 12. Dry, cold air from the outside rushes in through the air inlet, flows into the cavity through the air inlet end of the first partition wall heat exchanger 11, and indirectly contacts the spray water in the vertical channel, completing the first heat exchange. At this time, depending on the weather temperature, in summer, the first baffle 7 is closed and the second baffle 8 is opened, and the airflow runs downwards along the first partition wall heat exchanger 11 into the cooling coil 12. The heat exchange is improved by reducing the wet bulb temperature entering the cooling coil 12 and the first indirect heat exchanger 11, and the outlet water temperature is also reduced, thus completing the second heat exchange. The water is collected through the water tank 3. At the same time, the wet bulb air flows into the top of the tower body 1 along the vertical channel under the action of the fan 2. When the wet bulb air passes through the vertical channel of the first indirect heat exchanger 11, it indirectly contacts the dry and cold air that just entered from the air inlet, and performs the third heat exchange. The air flows out through the fan 2, and the water is collected through the water collector 4. When the second wind deflector 8 is closed and the first wind deflector 7 is opened during winter and spring, the wind blows upward through the first wind deflector 7. At this time, the water and air do not come into contact, so the water does not evaporate, which greatly reduces water consumption. The air flows out through the fan 2, and the water is collected through the water collector 4.

[0030] Example 2: When the second heat exchange component is composed of a second wall-mounted heat exchanger 13, the air inlet of the second wall-mounted heat exchanger 13 is provided with louvers 14.

[0031] The working process in this embodiment is as follows: Fan 2 is turned on, and spray water (circulating water) is introduced into the medium to be cooled through the first wall-mounted heat exchanger 11. Dry, cold air from the outside rushes in through the air inlet and flows into the cavity through the air inlet end of the first wall-mounted heat exchanger 11. The dry, cold air indirectly contacts the spray water in the vertical channel, completing the first heat exchange. At this time, depending on the weather temperature, in summer, the first baffle 7 is closed and the second baffle 8 is opened, and the airflow runs downwards along the first wall-mounted heat exchanger 11 into the cooling coil 12, which can reduce the amount of air entering the second cavity. The wet bulbs of the wall-mounted heat exchanger 13 and the water distribution packing 6 improve heat exchange and reduce the outlet water temperature, thereby completing the second heat exchange. The water is collected through the water tank 3 and fed into the spray head 5 by the spray pump 16. At the same time, the wet bulb air flows into the top of the tower body 1 along the vertical channel under the action of the fan 2. When the wet bulb air passes through the vertical channel of the first wall-mounted heat exchanger 11, it indirectly contacts the dry and cold air that has just entered from the air inlet, and performs the third heat exchange. The air flows out through the fan 2, and the water is collected through the water collector 4. When the second wind deflector 8 is opened during winter and spring, the first wind deflector 7 and the louvers 14 are opened, and the wind blows upward through the first wind deflector 7. At this time, the water and air do not come into contact, and the water does not evaporate, which greatly reduces water consumption. The air flows out through the fan 2, and the water is collected through the water collector 4.

[0032] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A combined dry and wet indirect cooling tower, characterized in that, The indirect cooling tower includes: a tower body, a baffle assembly, a fan, a water tank, a water collector, a spray head, a first heat exchange assembly, a water distribution packing, and a second heat exchange assembly; The fan is fixedly installed at the top of the tower body and connected to the interior of the tower body; the water tank is fixedly installed at the bottom of the tower body; the spray head is installed inside the tower body; the water collector is installed inside the tower body and located between the fan and the spray head; the first heat exchange component and the second heat exchange component are installed from top to bottom inside the tower body and located between the spray head and the water tank; the water distribution packing is installed between the first heat exchange component and the second heat exchange component; and the wind baffle assembly is installed inside the tower body and connected to the first heat exchange component and the second heat exchange component. The wind deflector assembly includes: a first wind deflector, a second wind deflector, a pulley, and a zipline; The first wind baffle and the second wind baffle are installed on one side of the tower body. The first wind baffle is located on the upper side of the first heat exchange component, and the second wind baffle is located on the upper side of the second heat exchange component. One end of the sliding cable is connected to the first wind baffle and the second wind baffle and passes through the pulley. The sliding cable and the pulley are used to switch the first wind baffle and the second wind baffle.

2. The dry-wet combined indirect cooling tower according to claim 1, characterized in that, The first heat exchange component is composed of a first indirect heat exchanger.

3. The dry-wet combined indirect cooling tower according to claim 2, characterized in that, The second heat exchange assembly consists of either a cooling coil or a second indirect heat exchanger.

4. The dry-wet combined indirect cooling tower according to claim 3, characterized in that, The first and second wall-mounted heat exchangers adopt a dual-channel structure, which consists of horizontal and vertical air ducts inside.

5. The dry-wet combined indirect cooling tower according to claim 1, characterized in that, A louver is provided between the second baffle plate and the first heat exchange component and the water distribution packing.

6. The dry-wet combined indirect cooling tower according to claim 3, characterized in that, When the second heat exchange component is composed of a cooling coil, the water tank and the spray head are connected by a spray pump and a pipe. When the second heat exchange component is composed of a second wall-mounted heat exchanger, the air inlet of the second wall-mounted heat exchanger is provided with louvers.

7. The dry-wet combined indirect cooling tower according to claim 1, characterized in that, The tower body is equipped with an inspection door.

8. The dry-wet combined indirect cooling tower according to claim 1, characterized in that, The wind deflector assembly is composed of louvers.

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