Dividing wall type closed cooling tower

Abstract

The utility model relates to the technical field of cooling towers, in particular to a dividing wall type closed cooling tower which comprises a body with a tube type heat exchanger, and a dividing wall cooling mechanism used for pre-cooling air entering the body is arranged on the air inlet face of the body. The dividing wall cooling mechanism comprises a gas pre-cooling chamber located on the outer wall face, corresponding to an air inlet of the body, of the body, a first air inlet hole is formed in the side wall face, away from the air inlet, of the gas pre-cooling chamber, a dividing wall type heat exchange mechanism is arranged in the gas pre-cooling chamber, and the air inlet end and the air outlet end of the dividing wall type heat exchange mechanism correspond to the first air inlet hole and the opening position respectively. A first spraying mechanism is arranged in the gas pre-cooling chamber, a cooling water inlet end and a cooling water outlet end are respectively arranged at the top and the bottom of the dividing wall type heat exchange mechanism, a second air inlet hole is formed in the side wall surface of the gas pre-cooling chamber below the first air inlet hole, and a first fan is arranged at the top of the gas pre-cooling chamber. The cooling tower solves the problem that an existing cooling tower is poor in cooling effect due to the fact that the existing cooling tower can only directly depend on outside air.

Description

Technical Field

[0001] This utility model relates to a closed cooling tower, specifically a partitioned closed cooling tower. Background Technology

[0002] A closed-circuit counterflow cooling tower is a type of cooling equipment that primarily achieves its cooling function through the circulation of a cooling medium (usually water). The cooling medium circulates within the system, absorbing the heat generated during the equipment or process, and then enters the cooling tower for cooling.

[0003] Inside the cooling tower, the cooling medium and the outside air come into contact in a counter-current flow. Specifically, the cooling medium flows downwards from the top of the cooling tower, while the outside air enters from the bottom and flows upwards. This counter-current contact allows for more sufficient heat exchange time between the cooling medium and the air, improving cooling efficiency. Because the counter-current flow ensures that the cooler air first comes into contact with the lower-temperature cooling medium, and as the air rises, its temperature gradually increases, while the temperature of the cooling medium gradually decreases. The temperature difference between the two remains at a relatively large level, thus enabling more effective transfer of heat from the cooling medium to the air, achieving a better cooling effect.

[0004] Existing counter-flow closed-circuit cooling towers can only use ambient air to cool the cooling medium. In summer, when the ambient air temperature or humidity is high, the cooling effect of the cooling medium will be affected. Utility Model Content

[0005] In order to solve the problems in related technologies, this utility model provides a closed-circuit cooling tower with indirect walls. This device solves the problem of poor cooling effect caused by the direct use of air from the external environment in existing counterflow closed-circuit cooling towers.

[0006] To solve the above problems, the following technical solutions are provided:

[0007] A closed-circuit cooling tower includes a body with a shell-and-tube heat exchanger for cooling medium; characterized in that the air inlet surface of the body has a closed-circuit cooling mechanism for pre-cooling the air entering the body.

[0008] The partition wall cooling mechanism includes a gas pre-cooling chamber located on the outer wall of the main body corresponding to the air inlet of the main body. The side wall of the gas pre-cooling chamber near the air inlet has an opening, and the side wall of the gas pre-cooling chamber away from the air inlet has a first air inlet hole. The first air inlet hole and the opening are both located corresponding to the air inlet.

[0009] The gas precooling chamber between the first air inlet tunnel and the opening has a partitioned heat exchange mechanism. In the partitioned heat exchange mechanism, a set of parallel two ends are respectively the air inlet end and the air outlet end, and the air inlet end and the air outlet end correspond to the positions of the first air inlet tunnel and the opening, respectively.

[0010] The gas precooling chamber above the partition wall heat exchanger has a first spray mechanism for spraying cooling water. The top and bottom of the partition wall heat exchanger are the cooling water inlet and cooling water outlet, respectively. The side wall of the gas precooling chamber below the first air inlet has a second air inlet, and the top of the gas precooling chamber has a first fan.

[0011] With the above technical solution, by setting up a gas precooling chamber, when the ambient humidity is low or it is winter, the air in the ambient environment can directly cool the medium. At this time, the first fan is closed and the first spray mechanism is closed. At this time, the air in the ambient environment is not precooled. The air in the ambient environment directly enters the air inlet through the first air inlet hole, passes through the partition heat exchange mechanism, and enters the body through the air outlet. At this time, the air can directly cool the cooling medium and ensure the cooling effect of the cooling medium.

[0012] When the ambient temperature is high or it is summer, the air temperature in the ambient environment is high. If the air directly enters the body to cool the cooling medium, the cooling effect of the cooling medium will be affected. Therefore, in this application, the first fan and the first spray mechanism are turned on. The air in the ambient environment enters the air inlet through the first air inlet hole. During the process of passing through the partition cooling mechanism, the first spray mechanism sprays cooling water onto the partition heat exchange mechanism. The cooling water enters the cooling water inlet and exchanges heat with the air entering the partition heat exchange mechanism from the air inlet. After the heat exchange is completed, the pre-cooling action of the air in the ambient environment is completed. The cooling water falls from the cooling water outlet. The cooled air enters the body from the air outlet and is then used to cool the cooling medium, causing the water in the body to undergo a phase change, thereby ensuring the cooling effect of the cooling medium.

[0013] When the cooling water sprayed by the first spray mechanism exchanges heat with the air entering the partition heat exchange mechanism from the air inlet, due to the setting of the first fan, the air in the outside environment will also enter the cooling water outlet of the partition heat exchange mechanism from the second air inlet and come into contact with the cooling water falling from the cooling water outlet. The cooling water falling from the cooling water outlet will undergo a phase change, thereby effectively ensuring the cooling effect of the cooling water falling from the cooling water outlet.

[0014] Furthermore, a first water collector is provided in the gas precooling chamber above the first spraying mechanism.

[0015] Furthermore, a first water collection tank is provided in the gas precooling chamber below the second air intake tunnel;

[0016] The first spraying mechanism includes a water pump, a water pumping pipe, and a spraying pipe. One end of the water pumping pipe is connected to the water inlet of the water pump, and the other end of the water pump is connected to the first water collection tank. The water outlet of the water pump is connected to one end of the spraying pipe, and the other end of the spraying pipe extends into the gas precooling chamber above the partition heat exchange mechanism. The bottom of the spraying pipe has multiple spray heads.

[0017] Through the above technical solution, by setting multiple spray heads, the spray heads can evenly spray the cooling water in the first water collection tank onto the surface of the partition heat exchange mechanism. This uniform spraying method significantly improves the uniformity of heat exchange between the cooling water and the hot air entering through the first air inlet, thereby effectively improving the cooling efficiency of the hot air.

[0018] Furthermore, the partition-type heat exchange mechanism includes multiple sets of heat exchange components. Each set of heat exchange components includes two heat exchange plates arranged sequentially. There is a gap between the two heat exchange plates in each set of heat exchange components. In adjacent heat exchange components, there is a gap between the two heat exchange plates that are close to each other. There are first sealing plates at the top and bottom of the two heat exchange plates in each set of heat exchange components. The front and rear ends of the two heat exchange plates in each set of heat exchange components are open, forming the air inlet and air outlet. In adjacent heat exchange components, the front and rear ends of the two heat exchange plates that are close to each other are both covered by second sealing plates. The top and bottom of the two heat exchange plates that are close to each other in adjacent heat exchange components are open, forming the cooling water inlet and cooling water outlet.

[0019] Through the above technical solution, by setting up a partitioned heat exchange mechanism, outside air enters the partitioned heat exchange mechanism through the first air inlet tunnel and flows between the air inlet and the air outlet. The sprayed cooling water enters the partitioned heat exchange mechanism and flows between the cooling water inlet and the cooling water outlet. The air and cooling water do not come into direct contact. Therefore, the gas entering the main body from the air inlet does not contain moisture, thereby reducing moisture loss and ensuring the long-term normal use of the device.

[0020] Furthermore, the shell-and-tube heat exchanger is disposed within the body above the air inlet, and both the medium outlet end and the medium inlet end of the shell-and-tube heat exchanger are located outside the body.

[0021] Furthermore, a second water collection tank is located in the body below the air inlet; a second spraying mechanism is located in the body above the tubular heat exchanger, the second spraying mechanism having the same structure as the first spraying mechanism, the second spraying mechanism being used to spray the cooling water from the second water collection tank onto the tubular heat exchanger; a second water collector is located in the body above the second spraying mechanism, and a second fan is located on the top of the body.

[0022] Through the above technical solution, by setting up the second water collector, the air contains a large amount of moisture before leaving the main body. This is because the sprayed water and the air have direct contact and heat exchange in the main body. The second water collector can separate the water droplets from the air before the air is discharged from the main body, thereby reducing water loss and ensuring the long-term stable operation of the main body.

[0023] Furthermore, there are two air inlets, and the gas precooling chamber is provided on the outer wall surface of the main body corresponding to the two air inlets.

[0024] By using the above technical solution and setting up two gas precooling chambers, the amount of precooled cold air entering the main body can be increased, thereby improving the cooling rate and cooling amplitude of the medium in the medium cooling mechanism, and thus increasing the output and rate of the cooling medium.

[0025] The above solution has the following advantages:

[0026] 1. By setting up a gas precooling chamber, when the ambient humidity is low or it is winter, the air in the ambient environment can directly cool the medium. At this time, the first fan is closed and the first spray mechanism is closed. At this time, the air in the ambient environment is not precooled. The air in the ambient environment directly enters the air inlet through the first air inlet hole, passes through the partition heat exchange mechanism, and enters the body through the air outlet. At this time, the air can directly cool the cooling medium and ensure the cooling effect of the cooling medium.

[0027] When the ambient temperature is high or it is summer, the air temperature in the ambient environment is high. If the air directly enters the body to cool the cooling medium, the cooling effect of the cooling medium will be affected. Therefore, in this application, the first fan and the first spray mechanism are turned on. The air in the ambient environment enters the air inlet through the first air inlet hole. During the process of passing through the partition cooling mechanism, the first spray mechanism sprays cooling water onto the partition heat exchange mechanism. The cooling water enters the cooling water inlet and exchanges heat with the air entering the partition heat exchange mechanism from the air inlet. After the heat exchange is completed, the pre-cooling action of the air in the ambient environment is completed. The cooling water falls from the cooling water outlet. The cooled air enters the body from the air outlet and is then used to cool the cooling medium, causing the water in the body to undergo a phase change, thereby ensuring the cooling effect of the cooling medium.

[0028] When the cooling water sprayed by the first spraying mechanism exchanges heat with the air entering the partition heat exchange mechanism from the air inlet, due to the setting of the first fan, the air in the outside environment will also enter the cooling water outlet of the partition heat exchange mechanism from the second air inlet and come into contact with the cooling water falling from the cooling water outlet. The cooling water falling from the cooling water outlet will undergo a phase change, thereby effectively ensuring the cooling effect of the cooling water falling from the cooling water outlet.

[0029] 2. By setting multiple spray heads, the spray heads can evenly spray the cooling water in the first water collection tank onto the surface of the partition heat exchange mechanism. This uniform spraying method significantly improves the uniformity of heat exchange between the cooling water and the hot air coming in through the first air inlet, thereby effectively improving the cooling efficiency of the hot air.

[0030] 3. With the setting of the partition heat exchange mechanism, the outside air enters the partition heat exchange mechanism through the first air inlet and flows between the air end and the air outlet. The sprayed cooling water enters the partition heat exchange mechanism and flows between the cooling water inlet and the cooling water outlet. The air and cooling water do not come into direct contact. Therefore, the gas entering the main body from the air inlet does not contain moisture, thereby reducing moisture loss and ensuring the long-term normal use of the device.

[0031] 4. With the installation of the second water collector, the air contains a large amount of moisture before leaving the main body. This is because the spray water and air have direct contact and heat exchange in the main body. The second water collector can separate the water droplets from the air before the air is discharged from the main body, thereby reducing water loss and ensuring the long-term stable operation of the main body.

[0032] 5. By setting up two gas precooling chambers, the amount of precooled cold air entering the main body can be increased, thereby improving the cooling rate and cooling amplitude of the medium in the medium cooling mechanism, thus increasing the output and rate of the cooling medium. Attached Figure Description

[0033] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0034] Figure 1 This is a structural schematic diagram of a specific embodiment 1 of a closed-loop cooling tower with indirect wall structure;

[0035] Figure 2 This is a cross-sectional view of a specific embodiment 1 of a closed-loop cooling tower with indirect wall;

[0036] Figure 3 This is a cross-sectional view of the main body of a closed-circuit cooling tower.

[0037] Figure 4 This is a cross-sectional view of the intermediate wall heat exchange mechanism of a closed-loop cooling tower.

[0038] Figure 5 for Figure 4 A magnified view of part number A in the middle;

[0039] Figure 6 This is a cross-sectional view of a specific embodiment 2 of a closed-loop cooling tower with indirect wall;

[0040] Figure 7 This is a schematic diagram of the first spray mechanism in a specific embodiment 1 of a closed-loop cooling tower;

[0041] Explanation of reference numerals in the attached drawings: 1. Main body; 2. Air inlet; 3. Gas precooling chamber; 4. First air inlet tunnel; 5. Second air inlet tunnel; 6. Shell and tube heat exchanger; 7. First spray mechanism; 701. Water pump; 702. Water extraction pipe; 703. Spray pipe; 7031. Water delivery pipe; 7032. Water discharge pipe; 8. Indirect heat exchange mechanism; 9. Cooling mechanism; 10. First water collector; 11. Second water collector; 12. First water collection tank; 13. Second water collection tank; 14. Medium inlet end; 15. Medium outlet end; 16. First fan; 17. Second fan; 18. First sealing plate; 19. Second sealing plate; 20. Spray head; 21. Liquid passage pipe. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] Specific Implementation Example 1: As shown in the example Figure 1-5 and Figure 7 As shown, a closed-circuit cooling tower includes a body 1 with a shell-and-tube heat exchanger 6, and the air inlet surface of the body has a closed-circuit cooling mechanism for pre-cooling the air entering the body 1.

[0044] The partition cooling mechanism includes a gas precooling chamber 3 located on the outer wall of the main body 1 corresponding to the air inlet 2 of the main body 1. The side wall of the gas precooling chamber 3 near the air inlet 2 has an opening, and the side wall of the gas precooling chamber 3 away from the air inlet 2 has a first air inlet 4. The first air inlet 4 and the opening are both located corresponding to the air inlet 2.

[0045] The gas precooling chamber 3 between the first air inlet 4 and the opening has a partition heat exchange mechanism 8. The two parallel ends of the partition heat exchange mechanism 8 are the air inlet and the air outlet, respectively. The air inlet and the air outlet correspond to the positions of the first air inlet 4 and the opening, respectively. The partition heat exchange mechanism 8 is used to precool the air entering the body 1.

[0046] The gas precooling chamber 3 above the partition heat exchanger 8 contains a first spraying mechanism 7 for spraying cooling water. The top and bottom of the partition heat exchanger 8 are the cooling water inlet and cooling water outlet, respectively.

[0047] The second air inlet 5 is located on the side wall of the gas precooling chamber 3 below the first air inlet 4. The inner wall of the gas precooling chamber 3 below the opening is sealed to the partition heat exchange mechanism 8. The first fan 16 is located on the top of the gas precooling chamber 3.

[0048] The first water collector 10 is located in the gas precooling chamber 3 above the first spraying mechanism 7; the first water collection tank 12 is located in the gas precooling chamber 3 below the second air inlet 5.

[0049] The first spraying mechanism 7 includes a water pump 701, a water pumping pipe 702 and a spraying pipe 703. One end of the water pumping pipe 702 is connected to the water inlet of the water pump 701, and the other end of the water pumping pipe 702 is connected to the first water collection tank 12. The water outlet of the water pump 701 is connected to one end of the spraying pipe 703. The other end of the spraying pipe 703 extends into the gas precooling chamber 3 above the partition heat exchange mechanism 8 and is set in a sealed shape. There are multiple spray heads 20 at the bottom of the spraying pipe 703.

[0050] like Figure 7 As shown, in this specific embodiment, the water pump 701 is located on one side of the gas precooling chamber. The spray pipe 703 includes a water supply pipe 7031 and multiple water discharge pipes 7032. The multiple spray pipes 703 are evenly distributed along the width direction of the gas precooling chamber 3, and each spray pipe 703 is arranged along the length direction of the gas precooling chamber 3. In this specific embodiment, a liquid passage pipe 21 is also included. The side wall of the liquid passage pipe 21 is connected to the water supply pipe 7031. The liquid passage pipe 21 is arranged along the width direction of the gas precooling chamber 3, and both ends of the liquid passage pipe 21 are sealed in the length direction. The side wall of the liquid passage pipe 21 is connected to each water discharge pipe 7032.

[0051] like Figure 4-5 As shown, the partition heat exchange mechanism 8 includes multiple sets of heat exchange components. Each set of heat exchange components includes two heat exchange plates arranged in sequence. There is a gap between the two heat exchange plates in each set of heat exchange components. In two adjacent heat exchange components, there is a gap between the two heat exchange plates that are close to each other. The two parallel and far-away side walls of the two heat exchange plates that are farthest apart from each other are respectively sealed and connected to the inner wall of the gas precooling chamber 3.

[0052] Each heat exchange assembly has a first sealing plate at the top and bottom between the two heat exchange fins. The front and rear ends of the two heat exchange fins in each assembly are open, forming an air inlet and an air outlet. Figure 5 As shown in the middle serial number P;

[0053] In two adjacent heat exchange components, the front and rear ends of the two heat exchange plates that are close to each other are equipped with second sealing plates 19. The top and bottom of the two heat exchange plates that are close to each other in two adjacent heat exchange components are open, forming a cooling water inlet and a cooling water outlet. Figure 5 As shown in the middle serial number P;

[0054] When the spray water is sprayed onto the partition heat exchange mechanism 8 by the first spray mechanism 7, no spray water will enter the heat exchange assembly with the first sealing plate 18 on the top. The spray water will only enter the heat exchange assembly without the first sealing plate 18 on the top. When it flows between the cooling water inlet and the cooling water outlet, the cooling water will not overflow due to the setting of the second sealing plate 19. It will only fall from the cooling water outlet.

[0055] Due to the obstruction of the second sealing plate 19, the air entering the partition heat exchange mechanism 8 from the first air inlet hole will only flow between the air inlet end and the air outlet end.

[0056] like Figure 3 As shown, the shell-and-tube heat exchanger 6 is installed inside the body 1 above the air inlet 2. The lower end of the shell-and-tube heat exchanger 6 is the medium inlet end 14, and the upper end of the shell-and-tube heat exchanger 6 is the medium outlet end 15. Both the medium outlet end 14 and the medium inlet end 15 of the shell-and-tube heat exchanger 6 are located outside the body 1.

[0057] like Figure 2 As shown, there is a second water collection tank 13 inside the main body 1 below the air inlet 2, and a second spraying mechanism 9 inside the main body 1 above the shell-and-tube heat exchanger 6. The second spraying mechanism 9 has the same structure as the first spraying mechanism 7. The second spraying mechanism 9 is used to spray the cooling water in the second water collection tank 13 onto the shell-and-tube heat exchanger 6. There is a second water collector 11 inside the main body 1 above the second spraying mechanism 9, and a second fan 17 on the top of the main body 1. Before the air leaves the main body 1, the air contains a large amount of moisture. This is because the sprayed water undergoes a phase change during the cooling process, so that the air leaving from the cooling water outlet contains moisture. The second water collector 11 can separate the water droplets from the air before the air is discharged from the main body 1, thereby reducing water loss and ensuring the long-term stable operation of the main body 1.

[0058] Specific Implementation Example 1 Operation Process: When the ambient humidity is low or it is winter, the air in the ambient environment can directly cool the medium inside the shell and tube heat exchanger. At this time, the first fan and the first spray mechanism are turned off, and the second fan and the second spray mechanism are turned on. The air in the ambient environment enters the air inlet through the first air inlet hole, passes through the partition heat exchange mechanism, and is discharged from the air outlet and enters the main body through the opening. The cooling medium enters the shell and tube heat exchanger from the medium inlet end. During the flow along the shell and tube heat exchanger, the second spray mechanism sprays the cooling water in the second water collection tank onto the shell and tube heat exchanger, and exchanges heat with the medium inside the shell and tube heat exchanger. After completion, the temperature of the medium inside the shell and tube heat exchanger drops and is discharged from the medium inlet end of the shell and tube heat exchanger into the main body.

[0059] The cooling water sprayed by the second spraying mechanism, after heat exchange with the medium inside the shell-and-tube heat exchanger, falls into the main body below the shell-and-tube heat exchanger. At this time, it comes into contact with the air entering the main body from the opening. The cooling water falling from the shell-and-tube heat exchanger will undergo a phase change, and some of the liquid cooling water will become gaseous cooling water and mix with the air. At this time, the gaseous cooling water and the air that has entered the main body from the opening and been heated by heat exchange will be drawn out of the main body by the second fan. Before leaving the main body, the second water collector will separate the gaseous water from the air.

[0060] When the ambient temperature is high or it is summer, the air temperature in the outside environment is high. If the air is directly introduced into the body to cool the cooling medium, the cooling effect of the cooling medium will be affected. Therefore, the air in the outside environment needs to be pre-cooled before being introduced into the body.

[0061] The specific pre-cooling process is as follows: the first fan and the first spray mechanism are turned on, and the air in the outside environment enters the air inlet through the first air inlet. During the process of passing through the partition cooling mechanism, the first spray mechanism sprays the cooling water in the first water collection tank onto the partition heat exchange mechanism. The cooling water enters the cooling water inlet and exchanges heat with the air entering the partition heat exchange mechanism from the air inlet. After the heat exchange is completed, the pre-cooling action of the air in the outside environment is completed. After the air in the outside environment is pre-cooled, it enters the body through the opening. The subsequent cooling process is the same as in summer.

[0062] The cooling water sprayed by the first spray mechanism falls from the cooling water outlet. When the cooling water sprayed by the first spray mechanism exchanges heat with the air entering the partition heat exchange mechanism from the air inlet, due to the setting of the first fan, the air in the external environment is also drawn in from the second air inlet and the cooling water outlet and enters the partition heat exchange mechanism, and then comes into direct contact with the cooling water falling from the cooling water outlet. The cooling water falling from the cooling water outlet will undergo a phase change, and some of the liquid cooling water will become gaseous cooling water and mix with the air, thereby effectively ensuring the cooling effect of the cooling water falling back to the first water collection tank from the cooling water outlet. Under the operation of the first motor, the air in the external environment mixed with gaseous cooling water is drawn upward by the first fan through the cooling water inlet and leaves the gas precooling chamber. Before leaving the gas precooling chamber, the first water collector will separate the gaseous cooling water in it.

[0063] Specific Implementation Example 2: As shown in the example Figure 3-7 As shown, the difference between this specific embodiment 2 and specific embodiment 1 is that: there are two air inlets 22, and gas precooling chambers 33 are provided on the side walls of the tower body 1 corresponding to the two air inlets 22; the provision of two gas precooling chambers 33 can increase the amount of cold air entering the tower body 1, thereby increasing the cooling rate and cooling amplitude of the medium in the medium cooling mechanism 96, and thus increasing the output and rate of the cooling medium.

[0064] The operation process of specific embodiment 2 is the same as that of specific embodiment 1. The difference is that several gas precooling chambers can be selected to precool the air in the external environment according to the needs.

[0065] In the description of this utility model, it should be understood that the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "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. In the description of this utility model, unless otherwise specified and limited, it should be noted that the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components, and can be direct connections or indirect connections through an intermediate medium. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0066] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. For those skilled in the art, other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all implementation methods here, and any obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A closed-loop cooling tower, comprising a body having a shell-and-tube heat exchanger; characterized in that, The air inlet surface of the body has a partition cooling mechanism for pre-cooling the air entering the body. The partition wall cooling mechanism includes a gas pre-cooling chamber located on the outer wall of the main body corresponding to the air inlet of the main body. The side wall of the gas pre-cooling chamber near the air inlet has an opening, and the side wall of the gas pre-cooling chamber away from the air inlet has a first air inlet hole. The first air inlet hole and the opening are both located corresponding to the air inlet. The gas precooling chamber between the first air inlet tunnel and the opening has a partitioned heat exchange mechanism. In the partitioned heat exchange mechanism, a set of parallel two ends are respectively the air inlet end and the air outlet end, and the air inlet end and the air outlet end correspond to the positions of the first air inlet tunnel and the opening, respectively. The gas precooling chamber above the partition wall heat exchanger has a first spray mechanism for spraying cooling water. The top and bottom of the partition wall heat exchanger are the cooling water inlet and cooling water outlet, respectively. The side wall of the gas precooling chamber below the first air inlet has a second air inlet, and the top of the gas precooling chamber has a first fan.

2. The indirect-contact closed-circuit cooling tower as described in claim 1, characterized in that, The gas precooling chamber above the first spraying mechanism has a first water collector.

3. A closed-circuit cooling tower as described in claim 2, characterized in that, The gas precooling chamber below the second air inlet tunnel has a first water collection tank; The first spraying mechanism includes a water pump, a water pumping pipe, and a spraying pipe. One end of the water pumping pipe is connected to the water inlet of the water pump, and the other end of the water pump is connected to the first water collection tank. The water outlet of the water pump is connected to one end of the spraying pipe, and the other end of the spraying pipe extends into the gas precooling chamber above the partition heat exchange mechanism. The bottom of the spraying pipe has multiple spray heads.

4. A closed-circuit cooling tower as described in claim 3, characterized in that, The partition wall heat exchange mechanism includes multiple sets of heat exchange components. Each set of heat exchange components includes two heat exchange plates arranged in sequence. There is a gap between the two heat exchange plates in each set of heat exchange components. In two adjacent heat exchange components, there is a gap between the two heat exchange plates that are close to each other. Each heat exchange assembly has a first sealing plate at the top and bottom between two heat exchange plates. The front and rear ends of the two heat exchange plates in each heat exchange assembly are open, forming the air inlet and air outlet. In two adjacent heat exchange components, the front and rear ends of the two heat exchange plates that are close to each other are equipped with second sealing plates. The top and bottom of the two heat exchange plates that are close to each other in the two adjacent heat exchange components are open, forming the cooling water inlet end and the cooling water outlet end.

5. A closed-circuit cooling tower as described in claim 3, characterized in that, The shell-and-tube heat exchanger is disposed within the main body above the air inlet, and both the medium outlet end and the medium inlet end of the shell-and-tube heat exchanger are located outside the main body.

6. A closed-circuit cooling tower as described in claim 5, characterized in that, The body below the air inlet contains a second water collection tank; The body above the shell-and-tube heat exchanger has a second spray mechanism. The second spray mechanism has the same structure as the first spray mechanism. The second spray mechanism is used to spray the cooling water from the second water collection tank onto the shell-and-tube heat exchanger. The main body above the second spraying mechanism has a second water collector, and the top of the main body has a second fan.

7. A closed-circuit cooling tower as described in claim 1, characterized in that, The system has two air inlets, and the gas precooling chamber is provided on the outer wall surface of the main body corresponding to the two air inlets.

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