Cooling tower with embedded sleeve-shaped modular filler and circulating water distribution cooling method

Abstract

The invention discloses a cooling tower with embedded sleeve-shaped modular packing and a circulating water distribution cooling method, and belongs to the technical field of cooling towers, the cooling tower comprises a cooling tower body, the embedded sleeve-shaped modular packing is arranged in the cooling tower body, the embedded sleeve-shaped modular packing comprises a plurality of cylindrical packing with different diameters and a mandrel, and the mandrel is arranged in the cooling tower body. A plurality of cylindrical fillers with different diameters are sleeved in a concentric circle mode, an annular gas-liquid heat exchange channel is formed between every two adjacent cylindrical fillers, the mandrel is inserted into the cylindrical filler on the innermost layer, and the gas-liquid heat exchange channel is arranged on the mandrel along the axis position. The filler provided by the invention adopts the embedded sleeve-shaped modular filler, and when the filler is replaced, the embedded sleeve-shaped modular filler can be directly taken out from the cooling tower body as a whole, so that the problems of high labor capacity and long replacement time caused by replacing a single filler in a narrow cooling tower body are solved.

Description

Technical Field

[0001] The invention relates to industrial circulating water cooling equipment, in particular to a cooling tower and a circulating water distribution cooling method. Background Art

[0002] The cooling or condensation of process media in the industrial field generally requires circulating water with a lower temperature. After absorbing heat, the circulating water needs to go to the cooling tower to evaporate and dissipate heat for cooling, and then be sent to the heat exchanger again to absorb the heat of the process medium. Cooling towers are divided into two categories: open and closed. In open cooling towers, the circulating water is in direct contact with the air from the environment for heat transfer, and the water quality is poor; while in closed cooling towers, the circulating water does not contact the ambient air, and the water quality is clean. Under the suction of the fan, the air in the environment is sucked into the tower for convective heat exchange with the circulating water in the coil.

[0003] The existing cooling towers have the following defects: first, the packing of the cooling tower usually needs to be replaced every three years. The existing packing replacement is done by manually removing the old packing in the tower and then inserting new packing in the tower body. This replacement method is not only labor-intensive but also time-consuming. The long-term replacement operation will affect the normal operation of the production equipment; second, the adaptability to the variable flow of circulating water is poor. Once the flow of circulating water is very small, the circulating water will be unevenly distributed, so that the circulating water cannot be evenly distributed in the water-sprinkling packing, thereby reducing the heat exchange efficiency; third, the existing cooling tower forms a water circulation refrigeration method between the cooling tower and the refrigerated device, and the cooling water in the tower adopts a one-way non-circulating refrigeration method, so the heat exchange effect is not good, the heat exchange efficiency is not high, and some cooling towers even waste water resources. Summary of the invention

[0004] In order to solve the above problems, the object of the present invention is to provide a cooling tower equipped with nested cylindrical modular fillers and a circulating water distribution cooling method which can improve the efficiency of filler replacement and evenly distribute water.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: A cooling tower equipped with nested cylindrical modular packing comprises a cooling tower body, wherein the cooling tower body is provided with nested cylindrical modular packing, wherein the nested cylindrical modular packing comprises a plurality of cylindrical packings of different diameters and a core shaft, wherein the plurality of cylindrical packings of different diameters are assembled in a concentric circle manner, and an annular air-liquid heat exchange channel is formed between adjacent cylindrical packings, the core shaft is inserted into the innermost cylindrical packing, and the core shaft is provided with an air-liquid heat exchange channel along the axis line; the top of the nested cylindrical modular packing decreases in height step by step from the outermost cylindrical packing to the innermost cylindrical packing, and a groove-like structure with a high edge and a low middle is formed on the top surface.

[0006] Furthermore, the inner surface of the cylindrical filler has multiple rows of long strip protrusion groups distributed from top to bottom, and the long strip protrusion groups are composed of multiple long strip protrusions distributed at intervals. The long strip protrusions are inclined and are neither parallel nor perpendicular to the axis of the cylindrical filler; the inclination direction of the long strip protrusion group in the upper row is opposite to that of the long strip protrusion group in the adjacent lower row.

[0007] Furthermore, the nested cylindrical modular filler is installed in a protective net frame, and rollers are provided at the bottom of the protective net frame; a filler replacement door is provided on the tower wall of the cooling tower body, a maintenance platform is provided on the outside of the cooling tower body, and a load-bearing guide rail is provided in the cooling tower body. The protective net frame is supported on the load-bearing guide rail by rollers, and the filler replacement door is opened. Under the action of external force, the protective net frame can be moved along the load-bearing guide rail to the maintenance platform.

[0008] Furthermore, it also includes a main fan, a water collecting tank, a scattering water distribution mechanism and a water guiding mechanism, the main fan is arranged at the top of the cooling tower body, the scattering water distribution mechanism is arranged in the cooling tower body and is located above the nested cylindrical modular filler, the water collecting tank is arranged in the cooling tower body and is located below the nested cylindrical modular filler, and an air inlet is opened on the side wall of the cooling tower body and below the nested cylindrical modular filler; the water guiding mechanism is arranged in the cooling tower body and is located between the scattering water distribution mechanism and the nested cylindrical modular filler, and the water guiding mechanism is used to guide the circulating water flowing out of the scattering water distribution mechanism to the nested cylindrical modular filler, and the circulating water flows from the edge of the groove-like structure at the top of the nested cylindrical modular filler along the groove wall to the middle of the groove.

[0009] Furthermore, the scattering water distribution mechanism includes a booster riser, a spherical shell, a pipe joint, an axis mounting frame, a vertical shaft, a turbine, a pressure reducing external expansion pipe and a scattering disk, the pipe joint is connected to the top of the spherical shell, the bottom of the spherical shell is connected to the upper end of the booster riser, the lower end of the booster riser is connected to the pressure reducing external expansion pipe, the axis mounting frame is arranged in the spherical shell, the booster riser is provided with the vertical shaft, the upper end of the vertical shaft passes through the upper port of the booster riser and is installed on the axis mounting frame through a bearing, the lower end of the vertical shaft passes through the booster riser and the pressure reducing external expansion pipe and is connected to the center of the disk surface of the scattering disk, the turbine is installed on the vertical shaft and close to the lower port of the booster riser, the pipe joint is connected to a circulating water delivery pipeline, and a circulating water delivery pump is arranged on the circulating water delivery pipeline.

[0010] Furthermore, a plurality of circulating water scattering strips are radially distributed on the surface of the scattering disk.

[0011] Furthermore, the nested cylindrical modular fillers, the vertical shaft, the turbine and the scattering disk are made of a plastic material with high hardness and low density, such as polypropylene.

[0012] Furthermore, the water guiding mechanism is an annular ring structure with an eight-shaped longitudinal section, the large opening at the upper end of the annular ring is in close contact with the inner wall of the cooling tower body and is sealed with the inner wall of the cooling tower body, and the small opening at the lower end of the annular ring is flush with the inner wall of the outermost cylindrical filler of the nested cylindrical modular filler.

[0013] Furthermore, a conical liquid collecting hopper is provided in the cooling tower body and below the nested cylindrical modular filler, the upper port of the conical liquid collecting hopper is sealedly connected to the inner wall of the cooling tower body, the lower port of the conical liquid collecting hopper is provided with a gas-liquid mixed flow heat exchange pipe, and the gas-liquid mixed flow heat exchange pipe is provided with a gas-liquid mixed flow heat exchange spiral channel.

[0014] A method for cooling a cooling tower equipped with nested cylindrical modular fillers by circulating water distribution comprises the following steps: Step A, guiding air heat exchange medium: start the main fan, the outside air heat exchange medium enters the cooling tower body through the air inlet on the side wall of the cooling tower body, then enters the conical liquid collecting hopper through the gas-liquid mixed flow heat exchange pipe, and then flows through each ring air-liquid heat exchange channel on the nested cylindrical modular packing, and finally discharged from the main fan to the cooling tower body; Step B, scattering circulating water: start the circulating water delivery pump, the circulating water in the circulating water delivery pipeline passes downward through the pipe joint, shaft mounting frame and spherical shell of the scattering water distribution mechanism, flows into the booster vertical pipe for boosting, and then flows to the turbine of the vertical shaft. Under the impact of the circulating water, the turbine drives the vertical shaft to rotate, and the vertical shaft drives the scattering plate to rotate. The circulating water flows downward through the turbine and the pressure reducing outer expansion pipe to the scattering plate. The rotating scattering plate scatters the circulating water onto the inner wall of the cooling tower body. Step C, diverting circulating water: the circulating water flows downward along the inner wall of the cooling tower body to the water diversion mechanism, and flows to the edge of the top of the nested cylindrical modular filler through the water diversion mechanism; Step D, distributing circulating water: the circulating water flows from the edge of the groove-shaped structure at the top of the nested cylindrical modular packing along the groove wall to the middle of the groove, and the circulating water is distributed to each ring air-liquid heat exchange channel; Step E, first gas-liquid heat exchange: the circulating water performs the first gas-liquid heat exchange with the air heat exchange medium in the process of meandering along the long strip protrusions in the long strip protrusion group in each ring air-liquid heat exchange channel; Step F, second gas-liquid heat exchange: After the first gas-liquid heat exchange, the circulating water flows out from each ring air-liquid heat exchange channel of the nested cylindrical modular packing and converges downward to the conical liquid collecting bucket. During the process of the circulating water flowing through the gas-liquid mixed flow heat exchange tube, the circulating water undergoes a second gas-liquid heat exchange with the air heat exchange medium, and the heat carried by the circulating water is taken away by the air heat exchange medium.

[0015] The beneficial effects of the present invention are: The filler of the present invention adopts nested cylindrical modular filler. When replacing the filler, the nested cylindrical modular filler can be directly taken out from the cooling tower body as a whole, which solves the problem of large labor workload and long replacement time caused by replacing a single filler in a narrow cooling tower body. In particular, the nested cylindrical modular filler is installed in a protective mesh frame, and the protective mesh frame is supported on the bearing guide rail by rollers, which further improves the replacement efficiency. After opening the filler replacement door, the staff can move the protective mesh frame along the bearing guide rail to the maintenance platform, remove the old nested cylindrical modular filler by a crane, and move the new nested cylindrical modular filler to the maintenance platform. The staff pushes it into the cooling tower body and closes the filler replacement door. The replacement time of the present invention does not exceed 3 minutes at most. Compared with the existing technology that requires several hours for replacement, it has obvious advantages, basically does not affect the normal operation of the cooling tower, and can ensure the continuous operation of the production equipment refrigerated by the cooling tower.

[0016] The top surface of the nested cylindrical modular packing of the present invention adopts a groove-shaped structure. The circulating water flows from the edge of the groove-shaped structure at the top of the nested cylindrical modular packing along the groove wall to the middle of the groove. The circulating water is distributed to each ring air-liquid heat exchange channel. This structure distributes water more evenly.

[0017] In order to adapt to the structural changes of the nested cylindrical modular fillers, the present invention also specially develops a matching scattering water distribution mechanism, which does not require electric drive, has no new energy loss, and has the characteristics of energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described with the aid of the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. A person skilled in the art can obtain other accompanying drawings according to the following drawings without creative work: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 A longitudinal section of the nested cylindrical modular packing shown; Figure 3 for Figure 1 A perspective view of the nested cylindrical modular packing shown; Figure 4 for Figure 3 An expanded view of the cylindrical packing shown; Figure 5 for Figure 1 The structural schematic diagram of the scattering water distribution mechanism shown.

[0019] In the figure: 1. cooling tower body; 2. main fan; 3. water collection tank; 4. scattering water distribution mechanism; 5. water guide mechanism; 6. nested cylindrical modular filler; 7. air inlet; 8. cylindrical filler; 9. mandrel; 10. annular air-liquid heat exchange channel; 11. air-liquid heat exchange channel; 12. groove structure; 13. strip-shaped protrusion group; 14. strip-shaped protrusion; 15. protective net frame; 16. roller; 17. filler replacement door; 18. maintenance Carrier; 19. Carrying guide rail; 20. Large opening at the upper end of the annular ring; 21. Small opening at the lower end of the annular ring; 22. Conical liquid collecting bucket; 23. Gas-liquid mixed flow heat exchange tube; 24. Pressurization vertical pipe; 25. Spherical shell; 26. Pipe joint; 27. Shaft mounting frame; 28. Vertical shaft; 29. ​​Turbine; 30. Pressure reducing expansion tube; 31. Scattering disk; 32. Bearing; 33. Circulating water delivery pipeline; 34. Circulating water delivery pump; 35. Circulating water scattering strip. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper surface", "lower surface", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "forward", "reverse", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0022] like Figure 1 , 2As shown in Figures 3 and 4, a cooling tower equipped with nested cylindrical modular fillers includes a cooling tower body 1, a main fan 2, a water collecting tank 3, a scattering water distribution mechanism 4, a water guiding mechanism 5 and a nested cylindrical modular filler 6, the main fan 2 is arranged at the top of the cooling tower body 1, the scattering water distribution mechanism 4 is arranged in the cooling tower body 1 and is located above the nested cylindrical modular filler 6, the water collecting tank 3 is arranged in the cooling tower body 1 and is located below the nested cylindrical modular filler 6, and an air inlet 7 is opened on the side wall of the cooling tower body 1 and below the nested cylindrical modular filler 6; the water guiding mechanism 5 is arranged in the cooling tower body 1 and is located between the scattering water distribution mechanism 4 and the nested cylindrical modular filler 6, the water guiding mechanism 5 is used to guide the circulating water flowing out of the scattering water distribution mechanism to the nested cylindrical modular filler, and the circulating water flows from the edge of the groove-like structure at the top of the nested cylindrical modular filler along the groove wall to the middle of the groove.

[0023] The nested cylindrical modular packing 6 includes a plurality of cylindrical packings 8 and a core shaft 9 of different diameters. The plurality of cylindrical packings 8 of different diameters are assembled in a concentric circle manner, and an annular air-liquid heat exchange channel 10 is formed between adjacent cylindrical packings. The core shaft 9 is inserted in the innermost cylindrical packing, and an air-liquid heat exchange channel 11 is provided on the core shaft along the axial line. The top of the nested cylindrical modular packing 6 decreases in height step by step from the outermost cylindrical packing to the innermost cylindrical packing, and a groove-like structure 12 with a high edge and a low middle is formed on the top surface. The top surface of the nested cylindrical modular packing of the present invention adopts a groove-like structure 12, and the circulating water flows from the edge of the groove-like structure at the top of the nested cylindrical modular packing along the groove wall to the middle of the groove, and the circulating water is distributed to each annular air-liquid heat exchange channel. This structure distributes water more evenly.

[0024] The inner surface of the cylindrical filler 8 is provided with a plurality of rows of long strip protrusion groups 13 from top to bottom, wherein the long strip protrusion groups 13 are composed of a plurality of spaced-apart long strip protrusions 14, and the long strip protrusions 14 are inclined, and are neither parallel nor perpendicular to the axis of the cylindrical filler 8; the inclination direction of the long strip protrusion groups 13 in the upper row is opposite to that of the long strip protrusion groups in the adjacent lower row.

[0025] The nested cylindrical modular filler 6 is installed in the protective net frame 15, and a roller 16 is provided at the bottom of the protective net frame 15; the tower wall of the cooling tower body 1 is provided with a filler replacement door 17, and the outer side of the cooling tower body 1 is provided with a maintenance platform 18, and the cooling tower body 1 is provided with a load-bearing guide rail 19. The protective net frame 15 is supported on the load-bearing guide rail 19 through the roller 16. The filler replacement door 17 is opened, and under the action of external force, the protective net frame 15 can be moved along the load-bearing guide rail 19 to the maintenance platform 18. After opening the packing replacement door, the staff can move the protective mesh frame along the load-bearing guide rail to the maintenance platform. Specifically, the packing replacement process is as follows: the protective mesh frame 15 equipped with the old nested cylindrical modular packing 6 is removed from the maintenance platform by a crane, and the protective mesh frame 15 equipped with the new nested cylindrical modular packing is moved to the maintenance platform (before replacement, the new nested cylindrical modular packing has been installed in the protective mesh frame 15). The staff pushes the protective mesh frame 15 into the cooling tower body 1 and closes the packing replacement door 17. The replacement time of the present invention does not exceed 3 minutes at most. Compared with the existing technology that takes several hours to replace, it has obvious advantages, basically does not affect the normal operation of the cooling tower, and can ensure the continuous operation of the production equipment cooled by the cooling tower.

[0026] The water guide mechanism 5 is an annular ring structure with an eight-shaped longitudinal section. The large opening 20 at the upper end of the annular ring is close to the inner wall of the cooling tower body and is sealed with the inner wall of the cooling tower body 1. The small opening 21 at the lower end of the annular ring is flush with the inner wall of the outermost cylindrical filler of the nested cylindrical modular filler. A conical liquid collecting hopper 22 is provided in the cooling tower body 1 and below the nested cylindrical modular filler. The upper port of the conical liquid collecting hopper 22 is sealed with the inner wall of the cooling tower body 1. The lower port of the conical liquid collecting hopper 22 is provided with a gas-liquid mixed flow heat exchange pipe 23, and a gas-liquid mixed flow heat exchange spiral channel is provided in the gas-liquid mixed flow heat exchange pipe.

[0027] The gas-liquid mixed flow heat exchange tube 23 has two functions: one is that it can perform gas-liquid mixed flow heat exchange again to improve the heat exchange efficiency; the other is that after the air flow enters the cooling tower body 1 from the air inlet 7, it flows upward through the gas-liquid mixed flow heat exchange tube in the middle of the cooling tower body 1, which can change the air flow distribution in the cooling tower body 1 and make the air flow more evenly distributed in the filler.

[0028] like Figure 5As shown, in order to adapt to the structural changes of the nested cylindrical modular packing, the present invention has also specially developed a matching scattering water distribution mechanism 4. The scattering water distribution mechanism 4 does not need to be powered on, has no energy loss, and has the characteristics of energy saving and environmental protection. The scattering water distribution mechanism 4 includes a booster vertical pipe 24, a spherical shell 25, a pipe joint 26, an axis mounting frame 27, a vertical shaft 28, a turbine 29, a pressure reducing external expansion pipe 30 and a scattering plate 31. The pipe joint 26 is connected to the top of the spherical shell 25, the bottom of the spherical shell 25 is connected to the upper end of the booster vertical pipe 24, the lower end of the booster vertical pipe 24 is connected to the pressure reducing external expansion pipe 30, the axis mounting frame 27 is arranged in the spherical shell 25, and the booster vertical pipe 24 is provided with the vertical shaft 28. The shaft 28, the upper end of the vertical shaft 28 passes through the upper port of the boost vertical pipe 24 and is installed on the shaft mounting frame 27 through the bearing 32, the lower end of the vertical shaft 28 passes through the boost vertical pipe 24 and the pressure reducing outer expansion pipe 30 and is connected to the center of the disk surface of the scattering disk 31, the turbine 29 is installed on the vertical shaft 28 and close to the lower port of the boost vertical pipe 24, the pipe joint 26 is connected to the circulating water delivery pipeline 33, and the circulating water delivery pipeline 33 is provided with a circulating water delivery pump 34. A plurality of circulating water scattering strips 35 are distributed on the disk surface of the scattering disk in a radially distributed manner, and the circulating water flowing onto the disk surface of the scattering disk is pushed outward along the radial direction of the scattering disk by the circulating water scattering strips 35. The nested cylindrical modular filler 6, the vertical shaft 28, the turbine 29 and the scattering disk 31 are made of plastic material with high hardness and low density. For example, the plastic material is polypropylene.

[0029] A method for cooling a cooling tower equipped with nested cylindrical modular fillers by circulating water distribution comprises the following steps: Step A, guiding air heat exchange medium: start the main fan 2, the external air heat exchange medium enters the cooling tower body through the air inlet 7 on the side wall of the cooling tower body 1, and then enters the conical liquid collecting hopper 22 through the gas-liquid mixed flow heat exchange pipe 23, and then flows through each ring air-liquid heat exchange channel 10 on the nested cylindrical modular filler 6, and finally discharged from the main fan 2 to the outside of the cooling tower body 1; Step B, scattering circulating water: start the circulating water delivery pump 34, the circulating water in the circulating water delivery pipeline 33 flows downward through the pipe joint 26, the shaft mounting frame 27, and the spherical shell 25 of the scattering water distribution mechanism 4, flows into the booster vertical pipe 24 for boosting, and then flows to the turbine 29 of the vertical shaft 28. Under the impact of the circulating water, the turbine 29 drives the vertical shaft 28 to rotate, and the vertical shaft 28 drives the scattering plate 31 to rotate. The circulating water flows downward through the turbine 29 and the pressure reducing outer expansion pipe 30 to the scattering plate 31, and the rotating scattering plate 31 scatters the circulating water onto the inner wall of the cooling tower body 1; Step C, diverting circulating water: the circulating water flows downward along the inner wall of the cooling tower body 1 to the water diversion mechanism 5, and flows to the edge of the top of the nested cylindrical modular filler 6 through the water diversion mechanism 5; Step D, distributing circulating water: the circulating water flows from the edge of the groove-shaped structure 12 at the top of the nested cylindrical modular packing 6 along the groove wall to the middle of the groove, and the circulating water is distributed to each ring air-liquid heat exchange channel 10; Step E, first gas-liquid heat exchange: the circulating water performs the first gas-liquid heat exchange with the air heat exchange medium in the process of meandering along the long strip protrusions 14 in the long strip protrusion group 13 in each ring air-liquid heat exchange channel 10; Step F, second gas-liquid heat exchange: After the first gas-liquid heat exchange, the circulating water flows out from each ring air-liquid heat exchange channel 10 of the nested cylindrical modular filler 6, and then converges downward onto the conical liquid collecting hopper 22. During the process of the circulating water flowing through the gas-liquid mixed flow heat exchange tube 23, the circulating water undergoes a second gas-liquid heat exchange with the air heat exchange medium, and the heat carried by the circulating water is taken away by the air heat exchange medium.

[0030] In addition, those skilled in the art may combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradiction. Although the embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Those skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A cooling tower equipped with nested cylindrical modular packing, comprising a cooling tower body, characterized in that: The cooling tower body is provided with nested cylindrical modular packing, and the nested cylindrical modular packing includes a plurality of cylindrical packings of different diameters and a core shaft. The plurality of cylindrical packings of different diameters are assembled in a concentric circle manner, and an annular air-liquid heat exchange channel is formed between adjacent cylindrical packings. The core shaft is inserted into the innermost cylindrical packing, and the core shaft is provided with an air-liquid heat exchange channel along the axial line. The top of the nested cylindrical modular packing decreases in height step by step from the outermost cylindrical packing to the innermost cylindrical packing, and a groove-like structure with a high edge and a low middle is formed on the top surface.

2. The cooling tower with nested cylindrical modular packing according to claim 1, characterized in that: The inner surface of the cylindrical filler is provided with multiple rows of long strip protrusion groups from top to bottom, and the long strip protrusion groups are composed of multiple long strip protrusions distributed at intervals. The long strip protrusions are inclined and are neither parallel nor perpendicular to the axis of the cylindrical filler; the inclination direction of the long strip protrusion groups in the upper row is opposite to that of the long strip protrusion groups in the adjacent lower row.

3. The cooling tower with nested cylindrical modular packing according to claim 2, characterized in that: The nested cylindrical modular filler is installed in a protective net frame, and rollers are provided at the bottom of the protective net frame; a filler replacement door is provided on the tower wall of the cooling tower body, a maintenance platform is provided on the outside of the cooling tower body, and a load-bearing guide rail is provided inside the cooling tower body. The protective net frame is supported on the load-bearing guide rail by rollers, and the filler replacement door is opened. Under the action of external force, the protective net frame can be moved along the load-bearing guide rail to the maintenance platform.

4. The cooling tower with nested cylindrical modular packing according to claim 3, characterized in that: It also includes a main fan, a water collecting tank, a scattering water distribution mechanism and a water guiding mechanism. The main fan is arranged at the top of the cooling tower body, the scattering water distribution mechanism is arranged in the cooling tower body and is located above the nested cylindrical modular filler, the water collecting tank is arranged in the cooling tower body and is located below the nested cylindrical modular filler, and an air inlet is opened on the side wall of the cooling tower body and below the nested cylindrical modular filler; the water guiding mechanism is arranged in the cooling tower body and is located between the scattering water distribution mechanism and the nested cylindrical modular filler, and the water guiding mechanism is used to guide the circulating water flowing out of the scattering water distribution mechanism to the nested cylindrical modular filler, and the circulating water flows from the edge of the groove-shaped structure at the top of the nested cylindrical modular filler along the groove wall to the middle of the groove.

5. The cooling tower equipped with nested cylindrical modular packing according to claim 4, characterized in that: The scattering water distribution mechanism comprises a booster vertical pipe, a spherical shell, a pipe joint, an axis mounting frame, a vertical shaft, a turbine, a pressure reducing external expansion pipe and a scattering disk. The pipe joint is communicated with the top of the spherical shell, the bottom of the spherical shell is communicated with the upper end of the booster vertical pipe, the lower end of the booster vertical pipe is connected with the pressure reducing external expansion pipe, the axis mounting frame is arranged in the spherical shell, the booster vertical pipe is provided with the vertical shaft, the upper end of the vertical shaft passes through the upper port of the booster vertical pipe and is installed on the axis mounting frame through a bearing, the lower end of the vertical shaft passes through the booster vertical pipe and the pressure reducing external expansion pipe and is connected to the center of the disk surface of the scattering disk, the turbine is installed on the vertical shaft and close to the lower port of the booster vertical pipe, the pipe joint is connected with a circulating water delivery pipeline, and a circulating water delivery pump is arranged on the circulating water delivery pipeline.

6. The cooling tower with nested cylindrical modular packing according to claim 5, characterized in that: A plurality of circulating water scattering strips are distributed radially on the disk surface of the scattering disk.

7. The cooling tower with nested cylindrical modular packing according to claim 6, characterized in that: The nested cylindrical modular filler, vertical shaft, turbine and scattering disk are made of plastic material with high hardness and low density.

8. The cooling tower with nested cylindrical modular packing according to claim 7, characterized in that: The water guiding mechanism is an annular ring structure with an eight-shaped longitudinal section. The large opening at the upper end of the annular ring is in close contact with the inner wall of the cooling tower body and is sealed with the inner wall of the cooling tower body. The small opening at the lower end of the annular ring is flush with the inner wall of the outermost cylindrical filler of the nested cylindrical modular filler.

9. The cooling tower equipped with nested cylindrical modular packing according to claim 8, characterized in that: A conical liquid collecting hopper is provided in the cooling tower body and below the nested cylindrical modular filler, the upper port of the conical liquid collecting hopper is sealed and connected to the inner wall of the cooling tower body, the lower port of the conical liquid collecting hopper is provided with a gas-liquid mixed flow heat exchange pipe, and the gas-liquid mixed flow heat exchange pipe is provided with a gas-liquid mixed flow heat exchange spiral channel.

10. The circulating water cooling method of the cooling tower equipped with nested cylindrical modular packing according to claim 9, characterized in that: The following steps are involved: Step A, guiding air heat exchange medium: start the main fan, the outside air heat exchange medium enters the cooling tower body through the air inlet on the side wall of the cooling tower body, then enters the conical liquid collecting hopper through the gas-liquid mixed flow heat exchange pipe, and then flows through each ring air-liquid heat exchange channel on the nested cylindrical modular packing, and finally discharged from the main fan to the cooling tower body; Step B, scattering circulating water: start the circulating water delivery pump, the circulating water in the circulating water delivery pipeline passes downward through the pipe joint, shaft mounting frame and spherical shell of the scattering water distribution mechanism, flows into the booster vertical pipe for boosting, and then flows to the turbine of the vertical shaft. Under the impact of the circulating water, the turbine drives the vertical shaft to rotate, and the vertical shaft drives the scattering plate to rotate. The circulating water flows downward through the turbine and the pressure reducing outer expansion pipe to the scattering plate. The rotating scattering plate scatters the circulating water onto the inner wall of the cooling tower body. Step C, diverting circulating water: the circulating water flows downward along the inner wall of the cooling tower body to the water diversion mechanism, and flows to the edge of the top of the nested cylindrical modular filler through the water diversion mechanism; Step D, distributing circulating water: the circulating water flows from the edge of the groove-shaped structure at the top of the nested cylindrical modular packing along the groove wall to the middle of the groove, and the circulating water is distributed to each ring air-liquid heat exchange channel; Step E, first gas-liquid heat exchange: the circulating water performs the first gas-liquid heat exchange with the air heat exchange medium in the process of meandering along the long strip protrusions in the long strip protrusion group in each ring air-liquid heat exchange channel; Step F, second gas-liquid heat exchange: After the first gas-liquid heat exchange, the circulating water flows out from each ring air-liquid heat exchange channel of the nested cylindrical modular packing and converges downward to the conical liquid collecting bucket. During the process of the circulating water flowing through the gas-liquid mixed flow heat exchange tube, the circulating water undergoes a second gas-liquid heat exchange with the air heat exchange medium, and the heat carried by the circulating water is taken away by the air heat exchange medium.

Images