An open-close cooling tower with indirect heater

Abstract

The application discloses an open-close cooling tower heated by an indirect heater, which comprises a water distributor, wherein the water distributor comprises a rotating shaft, a water guide shaft, a water distribution disc and an annular water guide cover; the water distribution disc is a cylindrical structure with an inverted trapezoidal longitudinal section; a water distribution cavity is arranged in the water distribution disc; a plurality of water distribution holes are distributed on the circumferential surface of the water distribution disc; the lower end of the rotating shaft is connected with the upper end of the water guide shaft; the lower end of the water guide shaft is connected with the central part of the upper surface of the water distribution disc; a water guide channel is arranged in the water guide shaft; a plurality of water guide holes are distributed on the circumferential surface of the water guide shaft; the annular water guide cover is airtightly mounted on the water guide shaft through a bearing and covers the water guide holes; a water inlet pipe joint is arranged on the annular water guide cover and connected with a water inlet pipe. The water distributor can rotate, and the cooling water is sprayed out of the water distribution holes on the water distribution disc under the action of centrifugal force, so that the cooling water is uniformly distributed on the filler module, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of cooling tower technology, specifically to an open-type cooling tower with indirect heating. Background Technology

[0002] Cooling of circulating water is the result of three processes: evaporative cooling, contact cooling, and radiative cooling, all occurring through contact between water and air. Evaporative cooling occurs when water forms droplets or a very thin film of varying sizes within the cooling system, increasing the contact area and duration with the air, thus enhancing evaporation and allowing the water vapor to carry away the heat required for vaporization, thereby cooling the water. Contact cooling occurs when water comes into contact with cooler air; the temperature difference allows heat from the hot water to be transferred to the air, lowering the water temperature. Radiative cooling is a phenomenon where heat energy is transferred in the form of electromagnetic waves without the need for a heat transfer medium.

[0003] During the existing cooling water circulation process, due to the long-term operation of the cooling tower, a large amount of heat accumulates in the packing module, which is composed of multiple stacked corrugated packing sheets. As a result, the temperature of the densely arranged corrugated packing sheets in the packing module gradually increases, and the higher temperature of the corrugated packing sheets greatly reduces the heat exchange efficiency of the cooling water.

[0004] Existing cooling towers also suffer from uneven cooling water distribution and the tendency for exhaust air to form white mist. Summary of the Invention

[0005] The purpose of this invention is to provide an open-closed cooling tower with indirect heating. The water distributor of this application is rotatable, and cooling water is sprayed out from the distribution holes on the distribution plate under the action of centrifugal force, thereby achieving uniform distribution of cooling water on the packing module and improving heat exchange efficiency.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A closed-loop cooling tower with indirect heating includes a water distributor. The water distributor comprises a rotating shaft, a guide shaft, a water distribution plate, and an annular water guide cover. The water distribution plate is a cylindrical structure with an inverted trapezoidal longitudinal section. A water distribution cavity is provided inside the water distribution plate. Multiple water distribution holes communicating with the water distribution cavity are distributed on the circumferential surface of the water distribution plate. The lower end of the rotating shaft is connected to the upper end of the guide shaft, and the lower end of the guide shaft is connected to the center of the upper surface of the water distribution plate. A water guiding channel is provided inside the guide shaft. The water guide shaft has multiple water guide holes that communicate with the water guide channel distributed on its circumferential surface. The annular water guide cover is sealed on the water guide shaft by bearings and covers the water guide holes. The annular water guide cover is provided with a water inlet pipe connector, which is connected to the water inlet pipe. The rotating shaft drives the water distribution plate to rotate through the water guide shaft. Cooling water enters the annular water guide cover through the water inlet pipe, and then enters the water distribution plate through the water guide holes and water guide channel. The cooling water is sprayed out from the water distribution holes on the water distribution plate under the action of centrifugal force.

[0007] Furthermore, it also includes a square tower body, a packing module, an exhaust fan, a reducer, and a water collection tank. The packing module is located inside the square tower body, and the water collection tank is located at the bottom of the square tower body and directly below the packing module. The reducer is installed on a fixed frame at the top of the square tower body. The rotating shaft is the output shaft of the reducer, and the input shaft of the reducer is connected to the fan blade mounting shaft of the exhaust fan. The exhaust fan is located at the top of the square tower body and directly above the reducer.

[0008] Furthermore, a flow guide shroud is provided inside the square tower and around the water distribution plate.

[0009] Furthermore, an indirect heater is provided above the exhaust fan.

[0010] Furthermore, the indirect heater is a finned heat exchange tube assembly. The inlet end of the finned heat exchange tube assembly is connected to one end of the cooling water circulation pipeline, and the other end of the cooling water circulation pipeline is connected to the cooling water outlet of the water collection tank. A water pump and a heating device are connected in series on the cooling water circulation pipeline. The outlet end of the finned heat exchange tube assembly is connected to the annular water guide cover through the inlet pipe.

[0011] Furthermore, the packing module includes multiple corrugated packing sheets stacked together. Each corrugated packing sheet is formed by connecting multiple packing sheet units. Each packing sheet unit includes an upper packing section, a lower packing section, and an air guide pipe. The upper and lower packing sections are respectively provided with an upper airflow chamber and a lower airflow chamber. The lower surfaces of the upper and lower packing sections are respectively provided with multiple spaced-apart upper air jet holes and multiple spaced-apart lower air jet holes, which are connected to the upper and lower airflow chambers, respectively. The lower end of the upper packing section is connected to the upper surface of the air guide pipe, and the upper end of the lower packing section is connected to the lower surface of the air guide pipe. The upper airflow chamber of the upper packing section and the lower airflow chamber of the lower packing section are both connected to the air guide pipe, and the upper and lower packing sections form a flat V-shaped structure. This invention designs the corrugated packing sheet into multiple packing sheet units. Each packing sheet unit has an airflow channel in the packing sheet and multiple air jet holes are added to the lower surface of the packing sheet. This design can remove the heat accumulated in the packing sheet itself to reduce the temperature of the corrugated packing sheet itself, thereby greatly improving the heat exchange efficiency.

[0012] Furthermore, the end of the lower packing section in the packing unit is connected to the end of the upper packing section in the adjacent packing unit, and the lower airflow cavity in the lower packing section of the packing unit is not connected to the upper airflow cavity in the upper packing section of the adjacent packing unit; one end of the air guide tube is a conical connector, and the other end of the air guide tube is a conical insertion interface, and the conical connector on the corrugated packing sheet is inserted into the corresponding conical insertion interface on the adjacent corrugated packing sheet.

[0013] Furthermore, it also includes a left baffle plate, a right baffle plate, an auxiliary left air supply fan, and an auxiliary right air supply fan. The left and right sides of the square tower body are respectively provided with a left air inlet and a right air inlet. The left and right baffle plates are respectively located at the left and right air inlets. The conical joint on the rightmost corrugated packing plate of the packing module passes through the right baffle plate and communicates with the outside atmosphere. The conical insertion interface on the leftmost corrugated packing plate of the packing module is connected to one end of the left air distribution pipe, and the other end of the left air distribution pipe passes through the left baffle plate and communicates with the outside atmosphere. The auxiliary left air supply fan is located at the left air inlet, and a left dust filter is provided around the auxiliary left air supply fan. The auxiliary right air supply fan is located at the right air inlet, and a right dust filter is provided around the auxiliary right air supply fan. This invention also adds two auxiliary fans to improve the kinetic energy of the airflow.

[0014] Furthermore, the left baffle plate has a left ventilation opening on its surface, and a left airflow adjustment mechanism is provided at the left ventilation opening to adjust its size; the right baffle plate has a right ventilation opening on its surface, and a right airflow adjustment mechanism is provided at the right ventilation opening to adjust its size. This invention adjusts the sizes of the left and right ventilation openings using the left and right airflow adjustment mechanisms to regulate the ratio of dry heat exchange airflow to wet heat exchange airflow, thereby adjusting the cooling tower to its optimal operating state and maximizing heat exchange efficiency. The left and right baffle plates of this invention are provided with ventilation openings. A portion of the airflow enters the square tower body through the ventilation openings and directly exchanges heat with the cooling water. At the same time, another portion of the airflow from the outside enters the corrugated packing sheet and indirectly exchanges heat with the water outside the corrugated packing sheet, realizing simultaneous dry and wet heat exchange. In particular, when a portion of the airflow is ejected from the corrugated packing sheet, it mixes with the airflow of the wet heat exchange to form a swirling flow, which increases the contact time between the airflow and the water, resulting in a longer and more thorough heat exchange.

[0015] Furthermore, the left airflow size adjustment mechanism has the same structure as the right airflow size adjustment mechanism. The right airflow size adjustment mechanism includes a servo motor, an adjustment disk, and an adjustment plate. The adjustment plate is installed on the adjustment disk and is close to the right vent on the right windbreak plate surface. The adjustment disk is installed on the output shaft of the servo motor.

[0016] The beneficial effects of this invention are as follows: This application improves the water distributor. Driven by the exhaust fan, the water distributor rotates, and the cooling water is sprayed out from the water distribution holes on the water distribution plate under the action of centrifugal force, so as to achieve the purpose of uniform distribution of cooling water on the packing module.

[0017] This application also adds an indirect heater, which not only pre-cools the cooling water, but also heats the humid and saturated airflow discharged from the square tower body 1 to form unsaturated air, thus preventing the formation of white fog. Furthermore, after the cooling water is pre-cooled, it flows downward into the packing module through the water distributor. When the pre-cooled cooling water exchanges heat with the airflow inside the square tower body, it reduces the water vapor content of the air and reduces water evaporation loss, thereby achieving the effect of water saving and fog elimination.

[0018] This application also improves the packing module by designing the corrugated packing sheet into multiple packing sheet units. Each packing sheet unit has an airflow channel in the packing sheet and multiple air jet holes are added to the lower surface of the packing sheet. This design can remove the heat accumulated in the packing sheet itself, thereby reducing the temperature of the corrugated packing sheet itself and improving the heat exchange efficiency. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1 The diagram shows the structure of the water distributor. Figure 3 for Figure 2 The longitudinal section of the water distribution plate, water guide shaft and annular water guide cover shown. Figure 4 for Figure 1 The diagram shows the structure of the corrugated packing sheet. Figure 5 for Figure 4 The diagram shows the structure of the packing sheet unit. Figure 6 for Figure 1 The diagram shows the structure of the right airflow size adjustment mechanism.

[0020] In the diagram: 1. Square tower body; 2. Packing module; 3. Left baffle plate; 4. Right baffle plate; 5. Exhaust fan; 6. Water collection tank; 7. Left air inlet; 8. Right air inlet; 9. Auxiliary left exhaust fan; 10. Left dust filter; 11. Auxiliary right exhaust fan; 12. Right dust filter; 13. Left vent; 14. Left airflow adjustment mechanism; 15. Right vent; 16. Right airflow adjustment mechanism; 17. Servo motor; 18. Adjustment disc; 19. Adjustment plate; 20. Corrugated packing sheet; 21. Packing sheet unit; 22. Upper packing section; 23. Lower packing section; 24. Air guide pipe; 25. Upper airflow chamber; 26. Lower... 27. Airflow cavity; 28. Upper jet nozzle; 29. ​​Lower jet nozzle; 30. Conical connector; 31. Conical insertion interface; 32. Water distributor; 33. Left air distribution pipe; 34. Rotating shaft; 35. Water guide shaft; 36. Water distribution plate; 37. Annular water guide cover; 38. Water distribution cavity; 39. Water distribution hole; 40. Water guide channel; 41. Bearing; 42. Water inlet pipe connector; 43. Water inlet pipe; 44. Reducer; 45. Fixing bracket; 46. Fan blade mounting shaft; 47. Flow guide cover; 48. Finned heat exchange tube assembly; 49. Cooling water circulation pipeline; 50. Cooling water outlet; 51. Water pump; 52. Heating equipment. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0022] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper surface," "lower surface," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "forward," "reverse," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0023] like Figure 1 As shown, an openable cooling tower with indirect heating includes a square tower body 1, a packing module 2, a left baffle plate 3, a right baffle plate 4, an exhaust fan 5, and a water collection tank 6. The packing module 2 is located inside the square tower body 1. The exhaust fan 5 is located at the top of the square tower body 1 and directly above the packing module 2. The water collection tank 6 is located at the bottom of the square tower body 1 and directly below the packing module 2. The left and right sides of the square tower body 1 are respectively provided with a left air inlet 7 and a right air inlet 8. The left baffle plate 3 and the right baffle plate 4 are respectively located at the left air inlet 7 and the right air inlet 8. The conical joint 29 on the rightmost corrugated packing plate of the packing module 2 passes through the right baffle plate 4 and communicates with the outside atmosphere. The conical insertion interface 30 on the leftmost corrugated packing plate of the packing module 2 is connected to one end of the left air distribution pipe 32. The other end of the left air distribution pipe 32 passes through the left baffle plate 3 and communicates with the outside atmosphere. An auxiliary left blower 9 is provided at the left air inlet 7, and a left dust filter 10 is provided around the auxiliary left blower 9. An auxiliary right blower 11 is provided at the right air inlet 8, and a right dust filter 12 is provided around the auxiliary right blower 11. A left ventilation opening 13 is provided on the surface of the left baffle plate 3, and a left airflow size adjustment mechanism 14 is provided at the left ventilation opening 13 to adjust the size of the left ventilation opening 13. A right ventilation opening 15 is provided on the surface of the right baffle plate 4, and a right airflow size adjustment mechanism 16 is provided at the right ventilation opening 15 to adjust the size of the right ventilation opening 15. A water distributor 31 is provided inside the square tower body 1 and above the packing module 2.

[0024] like Figure 2 , 3As shown, the water distributor 31 includes a rotating shaft 33, a water guide shaft 34, a water distribution plate 35, and an annular water guide cover 36. The water distribution plate 35 is a cylindrical structure with an inverted trapezoidal longitudinal section. A water distribution cavity 37 is provided inside the water distribution plate 35. Multiple water distribution holes 38 communicating with the water distribution cavity 37 are distributed on the circumferential surface of the water distribution plate 35. The lower end of the rotating shaft 33 is connected to the upper end of the water guide shaft 34. The lower end of the water guide shaft 34 is connected to the center of the upper surface of the water distribution plate 35. A water guide channel 39 is provided inside the water guide shaft 34. The circumferential surface of the water guide shaft 34 is divided into... The annular water guide cover 36 is provided with multiple water guide holes 40 communicating with the water guide channel 39. The annular water guide cover 36 is sealed on the water guide shaft 34 through the bearing 41 and covers the water guide holes 40. The annular water guide cover 36 is provided with a water inlet pipe connector 42, which is connected to the water inlet pipe 43. The rotating shaft 33 drives the water distribution plate 35 to rotate through the water guide shaft 34. Cooling water enters the annular water guide cover 36 through the water inlet pipe 43, and then enters the water distribution plate 35 through the water guide holes 40 and the water guide channel 39. Under the action of centrifugal force, the cooling water is sprayed out from the water distribution holes 38 on the water distribution plate 35.

[0025] A type of openable cooling tower with indirect heating also includes a speed reducer 44, which is mounted on a fixed frame 45 at the top inside the square tower body 1. The rotating shaft 33 is the output shaft of the speed reducer 44, and the input shaft of the speed reducer 44 is connected to the fan blade mounting shaft 46 of the exhaust fan 5. The exhaust fan 5 is located directly above the speed reducer 44. A flow guide shroud 47 is provided inside the square tower body 1 and around the water distribution plate 35.

[0026] An indirect heater is provided above the exhaust fan 5. The indirect heater is a finned heat exchange tube assembly 48. The water inlet end of the finned heat exchange tube assembly 48 is connected to one end of the cooling water circulation pipe 49. The other end of the cooling water circulation pipe 49 is connected to the cooling water outlet 50 of the water collection tank 6. A water pump 51 and a heating device 52 are connected in series on the cooling water circulation pipe 49. The water outlet end of the finned heat exchange tube assembly 48 is connected to the annular water guide cover 36 through the water inlet pipe 43.

[0027] like Figure 4 , 5As shown, the packing module 2 includes multiple corrugated packing sheets 20 stacked together. Each corrugated packing sheet 20 is formed by connecting multiple packing sheet units 21. Each packing sheet unit 21 includes an upper packing section 22, a lower packing section 23, and an air guide pipe 24. The upper packing section 22 and the lower packing section 23 are respectively provided with an upper airflow chamber 25 and a lower airflow chamber 26. The lower surfaces of the upper packing section 22 and the lower packing section 23 are respectively provided with multiple spaced upper air jet holes 27 and multiple spaced lower air jet holes 28. The upper air jet holes 27 and the lower air jet holes 28 are respectively connected to the upper airflow chamber 25 and the lower airflow chamber 26. The upper packing section 22 is connected to the upper surface of the air guide pipe 24, and the upper end of the lower packing section 23 is connected to the lower surface of the air guide pipe 24. The upper airflow chamber 25 of the upper packing section 22 and the lower airflow chamber 26 of the lower packing section 23 are both connected to the air guide pipe 24, and the upper packing section 22 and the lower packing section 23 form a flat V-shaped structure. The end of the lower packing section 23 in the packing plate unit 21 is connected to the end of the upper packing section 22 in the adjacent packing plate unit, and the lower airflow chamber 26 in the lower packing section of the packing plate unit is not connected to the upper airflow chamber 25 in the upper packing section of the adjacent packing plate unit. One end of the air guide pipe 24 is a conical connector 29, and the other end of the air guide pipe 24 is a conical insertion interface 30. The conical connector 29 on the corrugated packing plate 20 is inserted into the corresponding conical insertion interface 30 on the adjacent corrugated packing plate.

[0028] like Figure 6 As shown, the left airflow size adjustment mechanism 14 and the right airflow size adjustment mechanism 16 have the same structure. The right airflow size adjustment mechanism 16 includes a servo motor 17, an adjustment disk 18 and an adjustment plate 19. The adjustment plate 19 is installed on the adjustment disk 18 and is close to the right ventilation opening 15 on the right windbreak plate 4. The adjustment disk 18 is installed on the output shaft of the servo motor 17. The adjustment plate is fan-shaped.

[0029] Working principle: The water distributor 31 of this application rotates under the drive of the exhaust fan 5 via the reducer 44. Under the action of centrifugal force, the cooling water is sprayed out from the water distribution hole 38 on the water distribution plate 35. Most of the cooling water is sprayed directly onto the packing module 2, and a small portion of the cooling water is sprayed onto the guide shroud 47 and flows down along the guide shroud 47 onto the packing module 2, so as to achieve the purpose of distributing the cooling water on the packing module 2.

[0030] In this application, an indirect heater is added above the exhaust fan 5. After the cooling water in the cooling water circulation pipe 49 flows through the heating device, it carries away the heat from the heating device. The temperature of the cooling water generally rises to above 60°C. Driven by the water pump, the cooling water above 60°C enters the indirect heater through the cooling water circulation pipe 49 to exchange heat with the airflow discharged from the square tower 1. This not only pre-cools the cooling water, but also forms unsaturated air when heating the humid and saturated airflow discharged from the square tower 1, thus preventing the formation of white fog. Furthermore, after being pre-cooled, the cooling water flows downward into the packing module through the water distributor. When the pre-cooled cooling water exchanges heat with the airflow inside the square tower, it reduces the water vapor content of the air and reduces water evaporation loss, thereby achieving a water-saving and fog-eliminating effect.

[0031] This application also improves the packing module by designing the corrugated packing sheet into multiple packing sheet units. Each packing sheet unit has an airflow channel in the packing sheet and multiple air jet holes are added to the lower surface of the packing sheet. This design can remove the heat accumulated in the packing sheet itself, thereby reducing the temperature of the corrugated packing sheet 20 itself and improving the heat exchange efficiency.

[0032] In this application, a portion of the external airflow enters the square tower body 1 through the left vent 13 on the left baffle plate 3 and the right vent 15 on the right baffle plate 4, and then passes upward through the packing module 2. During the process of passing through the gaps of the corrugated packing sheets 20 in the packing module 2, it directly exchanges heat with the water sprayed by the spray assembly 31. At the same time, another portion of the external airflow enters the corrugated packing sheets 20 through the conical joint 2 on the right side of the packing module 2 and the left air distribution pipe 32 on the left side of the packing module 2, and indirectly exchanges heat with the water outside the corrugated packing sheets 20. This also removes the heat accumulated in the corrugated packing sheets 20 themselves, thereby reducing the temperature of the corrugated packing sheets 20. This solves the problem in the prior art where the temperature of the corrugated packing sheets 20 increases due to long-term operation, thus reducing the heat exchange efficiency.

[0033] Furthermore, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those embodiments or examples, without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A switchable cooling tower, comprising a water distributor, a square tower body, and a packing module, characterized in that: The water distributor includes a rotating shaft, a water guide shaft, a water distribution plate, and an annular water guide cover. The water distribution plate is a cylindrical structure with an inverted trapezoidal longitudinal section. The water distribution plate has a water distribution cavity inside. Multiple water distribution holes communicating with the water distribution cavity are distributed on the circumferential surface of the water distribution plate. The lower end of the rotating shaft is connected to the upper end of the water guide shaft. The lower end of the water guide shaft is connected to the center of the upper surface of the water distribution plate. The water guide shaft has a water guide channel inside. Multiple water guide holes communicating with the water guide channel are distributed on the circumferential surface of the water guide shaft. The annular water guide cover is sealed on the water guide shaft by bearings and covers the water guide holes. The annular water guide cover has a water inlet pipe connector, which is connected to the water inlet pipe. The rotating shaft drives the water distribution plate to rotate through the water guide shaft. Cooling water enters the annular water guide cover through the water inlet pipe, and then enters the water distribution plate through the water guide holes and water guide channel. The packing module is housed within a square tower body. The packing module comprises multiple stacked corrugated packing sheets, each formed by connecting multiple packing sheet units. Each packing sheet unit includes an upper packing section, a lower packing section, and a gas guide pipe. The upper and lower packing sections each contain an upper airflow chamber and a lower airflow chamber, respectively. The lower surfaces of the upper and lower packing sections each have multiple spaced-apart upper and lower airflow holes, respectively, which communicate with the upper and lower airflow chambers. The lower end of the upper packing section is connected to the upper surface of the gas guide pipe, and the upper end of the lower packing section is connected to the lower surface of the gas guide pipe. Both the upper and lower airflow chambers of the upper and lower packing sections communicate with the gas guide pipe, and the upper and lower packing sections form a horizontal V-shaped structure. The end of the lower packing section in the packing unit is connected to the end of the upper packing section in the adjacent packing unit, and the lower airflow cavity in the lower packing section of the packing unit is not connected to the upper airflow cavity in the upper packing section of the adjacent packing unit; one end of the air guide tube is a conical connector, and the other end of the air guide tube is a conical insertion interface, and the conical connector on the corrugated packing sheet is inserted into the corresponding conical insertion interface on the adjacent corrugated packing sheet; It also includes a left baffle plate, a right baffle plate, an auxiliary left air supply fan, and an auxiliary right air supply fan. The left and right sides of the square tower body are respectively provided with a left air inlet and a right air inlet. The left and right baffle plates are respectively located at the left and right air inlets. The conical joint on the rightmost corrugated packing plate of the packing module passes through the right baffle plate and communicates with the outside atmosphere. The conical insertion interface on the leftmost corrugated packing plate of the packing module is connected to one end of the left air distribution pipe. The other end of the left air distribution pipe passes through the left baffle plate and communicates with the outside atmosphere. The left air baffle has a left ventilation opening on its surface, and a left airflow adjustment mechanism is provided at the left ventilation opening; the right air baffle has a right ventilation opening on its surface, and a right airflow adjustment mechanism is provided at the right ventilation opening.

2. The open / closed cooling tower according to claim 1, characterized in that: It also includes an exhaust fan, a reducer, and a water collection tank. The water collection tank is located at the bottom of the square tower body and directly below the packing module. The reducer is installed on a fixed frame at the top of the square tower body. The rotating shaft is the output shaft of the reducer. The input shaft of the reducer is connected to the fan blade mounting shaft of the exhaust fan. The exhaust fan is located at the top of the square tower body and directly above the reducer.

3. The open / closed cooling tower according to claim 2, characterized in that: A flow guide shroud is provided inside the square tower and around the water distribution plate.

4. The openable / closed cooling tower according to claim 3, characterized in that: An indirect heater is installed above the exhaust fan.

5. The open / closed cooling tower according to claim 4, characterized in that: The indirect heater is a finned heat exchange tube assembly. The inlet end of the finned heat exchange tube assembly is connected to one end of the cooling water circulation pipeline, and the other end of the cooling water circulation pipeline is connected to the cooling water outlet of the water collection tank. A water pump and a heating device are connected in series on the cooling water circulation pipeline. The outlet end of the finned heat exchange tube assembly is connected to the annular water guide cover through the inlet pipe.

6. The open / closed cooling tower according to claim 5, characterized in that: The auxiliary left blower is provided at the left air inlet, and a left dust filter is provided around the auxiliary left blower; the auxiliary right blower is provided at the right air inlet, and a right dust filter is provided around the auxiliary right blower.

7. The open / closed cooling tower according to claim 6, characterized in that: The left airflow size adjustment mechanism has the same structure as the right airflow size adjustment mechanism. The right airflow size adjustment mechanism includes a servo motor, an adjustment disk, and an adjustment plate. The adjustment plate is installed on the adjustment disk and is close to the right vent on the right windbreak plate. The adjustment disk is installed on the output shaft of the servo motor.

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