Counter-flow cooling tower

Abstract

The utility model discloses a counter flow type cooling tower, which comprises a frame structure and a cooling tower body arranged on the frame structure, an air duct, a water collector, a water distribution system and a filler are sequentially arranged along the cooling tower body from top to bottom, a fan is arranged in the air duct, the filler comprises a filler layer with an S-wave-shaped surface, and the surface of the filler layer is provided with a water inlet and a water outlet. The wave crest and the wave trough of the S wave form are arc-shaped, and the extending direction of the S wave is consistent with the water flow direction and the air flow direction; according to the utility model, not only is the heat exchange efficiency higher, but also dirt, impurities or sediments are not easy to accumulate between wave crests and wave troughs of the filler, water flow blockage caused by blockage is avoided, and the cooling efficiency is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to a cooling tower technical field, especially a counterflow type cooling tower. BACKGROUND

[0002] Cooling tower process principle: in the sulfuric acid production process, the high temperature circulating water after the heat exchange of the acid purification and dry absorption system is into the cooling tower through the circulating pump, and the cooling tower is recycled after cooling. The high temperature circulating water is into the water distribution pipe through the water pump with certain pressure, and the nozzle on the water distribution pipe evenly sprays the water on the filler, and the air enters the cooling tower inside under the action of the fan through the louver on the bottom side, and the hot water forms the water film and the air on the filler surface to exchange heat, and the hot air with high humidity is extracted from the top, and the cooled water drops into the pool and is sent back to the acid making system for use. The cooling tower performance determines the cooling effect of the circulating water in this process, and restricts the stability of production. Therefore, it is very important to control the high performance operation of the cooling tower.

[0003] The existing cooling tower has the following problems:

[0004] (1) The original cooling tower adopts PVC inclined ladder-shaped wave filler. The filler height is 1m, the water vapor contact time is short, and the heat exchange efficiency is low. The wave pressure of the filler sheet is small, and due to the shape and arrangement of the filler, dirt, impurities or deposits are easy to accumulate between the wave peaks and wave troughs of the filler, thereby causing blockage, leading to water flow obstruction and affecting cooling efficiency.

[0005] (2) The energy consumption of the fan and circulating water pump is too large. The corrosion of the cooling tower water distribution pipe and the blockage of the nozzle cause the pipe resistance to increase, resulting in high back pressure of the circulating water pump and increased energy consumption. The design of the air duct is unreasonable, the fan blade is heavy, and the air resistance caused by the blockage of the filler leads to high energy consumption of the fan.

[0006] (3) The water distribution system is a tree type water distribution, and the original water distribution pipe diameter is small, so that the flow rate is too high. The water distribution pipe is 0.7m away from the filler, the water distribution height is too low, the splash overlap area is too large, and the water distribution uniformity is damaged. The nylon material U-shaped nozzle used is easy to block and loosen and fall off, and long-term contact with water vapor will cause corrosion and aging. The color changes to brown at first, and then breaks, causing uneven water distribution and affecting the cooling effect.

[0007] (4) The HC150-45 deflection type water collector made of PVC material is used at the upper part of the original cooling tower, the water collector sheet distance is 45mm, and the water collection effect is not obvious. Under the condition of long time high speed operation, the water floating rate is high.

[0008] (5) There are safety hazards, the tower body is high, plus the water storage pool, the whole cooling tower body is about 13m high, the safety of the ladder is low, the frame structure design has defects, and the structure is unstable with long term operation. UTILITY MODEL CONTENT

[0009] The utility model aims at providing a counterflow cooling tower, solves the problem of poor cooling effect in the prior art.

[0010] The utility model discloses a counterflow cooling tower, including frame structure and the cooling tower body of being placed on frame structure, along the cooling tower body from top to bottom is equipped with wind cylinder, water collector, water distribution system and filler in proper order, be equipped with fan in the wind cylinder, the filler is S wave filler layer, the wave crest and wave trough of S wave shape are arc, the extension direction of S wave is identical with water flow direction and airflow direction.

[0011] High temperature circulating water enters water distribution system, and is evenly sprayed to the filler through the water distribution pipe in water distribution system, and high temperature circulating water flows along the S wave shape of the filler surface, and air flows along the S wave shape of the filler surface in the opposite direction of water flow, so that high temperature circulating water and air exchange heat at the filler, and the cooled water enters the water storage tank, and hot air with high humidity passes through the water collector and is extracted from the top of the cooling tower through the fan, to complete the cooling of high temperature circulating water, in the process, the filler surface of the utility model is S wave shape, and the wave crest and wave trough are arc, compared with the existing oblique ladder wave filler, the utility model not only has higher heat exchange efficiency, but also dirt, impurities or sediments are not easy to accumulate between the wave crest and wave trough of the filler, to avoid water flow obstruction caused by blockage, and ensure cooling efficiency.

[0012] The further technical scheme of the utility model is that the filler layer includes 3 layers, and the height of each layer is 0.5-0.7 m.

[0013] The further technical scheme of the utility model is that the water distribution system includes a water distribution pipe and three splash type nozzles communicated with the water distribution pipe.

[0014] The further technical scheme of the utility model is that the height of the three splash type nozzles from the filler is 1.2-1.5 m, the three splash type nozzles are made of 316L material, the outlet pressure of the three splash type nozzles is 0.15-0.18 MPa, and the diameter of the water distribution pipe is 200-220 mm.

[0015] The further technical scheme of the utility model discloses: the water distribution pipe adopts glass steel material quality.

[0016] The further technical scheme of the utility model discloses: the wind tube is the high wind tube of kinetic energy recovery, and the fan is connected with the variable frequency motor.

[0017] The further technical scheme of the utility model discloses: the inlet and the outlet of the wind tube adopt glass steel material quality, the inlet of the wind tube is equipped with longitudinal reinforcing rib, and the outlet and the middle part of the wind tube are equipped with annular reinforcing rib.

[0018] The further technical scheme of the utility model discloses: the water collector is three-dimensional water collector.

[0019] The further technical scheme of the utility model discloses: the frame structure includes stand and diagonal bracing, and the stand is fixedly installed on the mounting seat through fixing piece.

[0020] The further technical scheme of the utility model discloses: the mounting seat is lattice cement beam, and the stand and the diagonal bracing are all glass steel square tubes.

[0021] The utility model discloses a beneficial effect: high temperature circulating water enters water distribution system, and even spray on the filler through the water distribution pipe in water distribution system, and high temperature circulating water along the S wave shape of filler surface flow, air and water flow direction are opposite and along the S wave shape of filler surface flow, thereby high temperature circulating water and air carry out heat exchange at the filler, and the cooling water after heat exchange enters the water storage pool, and the hot air of high humidity passes through the water collector and then is drawn out from the top of cooling tower through the fan, and the cooling of high temperature circulating water is completed, in this process, the utility model discloses the filler surface is S wave shape, and the wave crest and wave trough are arc, compared with the existing inclined ladder wave filler, the utility model discloses not only higher heat exchange efficiency, and dirt, impurity or deposit does not easily gather between the wave crest and wave trough of filler, avoids the water flow obstruction caused by the blockage, guarantees the cooling efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structure schematic diagram of counterflow type cooling tower provided by the utility model,

[0023] Figure 2 It is the schematic diagram of filler arrangement direction and water flow and air flow direction provided by the utility model,

[0024] Figure 3 It is the structure schematic diagram of three splash type shower head provided by the utility model,

[0025] Figure 4 It is the layout drawing of cooling tower base provided by the utility model,

[0026] Figure 5 It is the schematic diagram of frame structure provided by the utility model,

[0027] Figure 6 It is the top deck arrangement drawing of cooling tower provided by the utility model.

[0028] Signs: 1. cooling tower body, 2. fan, 3. water distribution system, 31. water distribution pipe, 32. three splash type shower head, 4. filler, 5. mounting seat, 6. wind pipe, 61. contraction section, 62. throat, 63. diffusion section, 7. frame structure, 71. stand column, 72. inclined support, X. water flow direction, Y. air flow direction, 8. water collector, 9. stair, 10. top deck. DETAILED DESCRIPTION

[0029] The following through specific concrete example explains the embodiment of the utility model, and the person skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. The utility model can also be implemented or applied by another different specific embodiment, and each detail in the specification can be based on different viewpoints and applications, and various modifications or changes are carried out without departing from the spirit of the utility model.

[0030] Embodiment one:

[0031] Figures 1-6 A counterflow cooling tower is shown, comprising a frame structure 7 and a cooling tower body 1 placed on the frame structure 7, a wind pipe 6, a water collector 8, a water distribution system 3 and a filler 4 are sequentially arranged from top to bottom along the cooling tower body 1, a fan 2 is arranged in the wind pipe 6, the filler 4 comprises a filler layer with an S-shaped surface, the peaks and valleys of the S-shaped surface are arc-shaped, and the extension direction of the S-shaped surface is consistent with the water flow direction X and the air flow direction Y.

[0032] The high-temperature circulating water enters the water distribution system, is uniformly sprayed onto the filler through the water distribution pipes in the water distribution system, flows along the S-shaped surface of the filler, and air flows along the S-shaped surface of the filler in the opposite direction of the water flow, so that the high-temperature circulating water and the air exchange heat at the filler, the cooled water enters the water storage tank, the hot air with high humidity passes through the water collector and is then drawn out from the top of the cooling tower through the fan, and the cooling of the high-temperature circulating water is completed; in this process, the filler surface of the utility model is S-shaped, and the peaks and valleys are arc-shaped, compared with the existing oblique ladder-shaped filler, the utility model not only has higher heat exchange efficiency, but also is not easy to accumulate dirt, impurities or sediments between the peaks and valleys of the filler, so as to avoid water flow obstruction caused by blockage and ensure cooling efficiency.

[0033] In the embodiment, the filler layer comprises three layers, and the height of each layer is 0.5-0.7 m. Considering the space of the water distribution system, the water collector and the bottom water collecting tank, the filler layer is divided into three layers, and the cooling effect is optimal when the height of each layer is 0.5-0.7 m.

[0034] In the embodiment, the filler layer comprises three layers, and the height of each layer is 0.5 m, and the total height of the filler is 1.5 m.

[0035] In the embodiment, the filler is the main component for heat exchange of the cooling tower. Its function is to generate as much air-water interface contact area as possible in the range of minimum wind pressure loss, the filler adopts S-shaped filler, the material is PVC material, the height of the filler is 1.5 m, the height of each layer of the filler is 0.5 m, and the filler is divided into three layers; the filler in the utility model has high heat dissipation coefficient, light weight, toughness, water impact resistance, and will not be deformed and brittle, the S-shaped filler increases the water film contact area, improves the contact time of water droplets and air flow, and the water-air heat exchange is more sufficient, so that the heat exchange rate is greatly improved. The filler is installed without gap, and is tightly filled between the tower wall and the beam column without wall flow. While ensuring uniform distribution of water, the filler reduces air resistance and reduces the energy consumption of the fan. After use, the filler has good use effect and obvious cooling efficiency.

[0036] In the embodiment, the water distribution system 3 comprises a water distribution pipe 31 and three-splashing nozzles 32 communicating with the water distribution pipe 31. The three-splashing nozzles have strong sewage passing capacity, are not easy to be blocked, and have great adaptability to hydraulic load.

[0037] In the embodiment, the three-splashing nozzles are made of 316L stainless steel, as shown in the figure. Figure 3 The required pressure at the outlet of the three-splashing nozzles is 0.15 MPa, and flange positioning connection is adopted to effectively prevent the nozzles from falling off.

[0038] In the embodiment, the height of the three-splashing nozzles 32 from the filler 4 is 1.2 m-1.5 m, the outlet pressure of the three-splashing nozzles 32 is 0.15 MPa-0.18 MPa, and the diameter of the water distribution pipe 31 is 200 mm-220 mm. The pressure of the three-splashing nozzles and the diameter of the water distribution pipe, combined with the height position of the three-splashing nozzles from the filler, make the water distribution system in the utility model ensure uniform splashing under the premise of reducing the splashing overlap area, preventing large water droplets or water flow formed by meeting of splashed water droplets from the nozzle from affecting the heat exchange effect, and also avoiding or reducing the water distribution gap when the water pressure fluctuates.

[0039] In the embodiment, the water distribution pipe 31 is made of glass steel material. The pipeline adopts the glass steel material water distribution pipe which is corrosion-resistant and high-temperature-resistant, greatly prolongs the service life of the system and reduces the maintenance cost.

[0040] In the embodiment, the pipeline in the water distribution system adopts the glass steel material water distribution pipe which is corrosion-resistant and high-temperature-resistant, greatly prolongs the service life of the system and reduces the maintenance cost. The diameter of the water distribution pipe is 200 mm, and the spraying height is 1.5 m. The nozzle is a 316L stainless steel three-splashing nozzle, as shown in the figure. Figure 3 The required pressure at the outlet of the three-splashing nozzles is 0.15 MPa, and flange positioning connection is adopted to effectively prevent the nozzles from falling off. The three-splashing nozzles have strong sewage passing capacity, are not easy to be blocked, and have great adaptability to hydraulic load. The water distribution system in the utility model can reduce the splashing overlap area, prevent large water droplets or water flow formed by meeting of splashed water droplets from the nozzle from affecting the heat exchange effect, and also avoid or reduce the water distribution gap under the premise of ensuring uniform splashing when the water pressure fluctuates. Combined with the streamline design, the nozzle reduces the fluid resistance, increases the rotation speed and throwing force of the water flow in the cavity, and can quickly splash into misty fine water droplets when impacting the large-diameter splashing blades, thereby reducing the energy consumption of the fan.

[0041] In the embodiment, the wind tube 6 is a high wind tube for kinetic energy recovery, and the fan 2 is connected with a variable frequency motor. The wind tube can discharge the hot air extracted by the fan to the outside of the tower to avoid the backflow of the hot air, and can also use the discharged air to recover the pressure in the tower to reduce the power of the fan. The cooling tower wind tube uses a high wind tube for kinetic energy recovery, which effectively increases the air volume under the condition that the motor power and the fan model are unchanged. To further improve the adjustment flexibility of the system, a variable frequency motor is introduced to accurately control the fan, and the fan blades of the cooling tower are made of glass fiber reinforced plastic, which has a longer service life and lighter weight. In the case of high cooling demand in summer, the fan angle does not need to be adjusted, and the motor load is increased. The fan works at the best speed according to the actual working condition, which reduces energy consumption and improves cooling effect.

[0042] In the embodiment, the inlet and outlet of the wind tube 6 are made of glass fiber reinforced plastic, the inlet of the wind tube 6 is provided with longitudinal reinforcing ribs, and the outlet and middle part of the wind tube 6 are provided with reversing reinforcing ribs. The inlet and outlet of the wind tube are made of glass fiber reinforced plastic with lower flow resistance and higher strength, which effectively reduces the resistance loss of the system.

[0043] In the embodiment, the wind tube 6 is a high wind tube for kinetic energy recovery, which includes a "three-section" structure of a contraction section 61, a throat section 62 and a diffusion section 63, forming a parabolic high-efficiency wind guide tube. This structure design makes the inner wall of the wind tube smooth, the airflow at the outlet is uniformly distributed and flows smoothly, the fan pressure can be effectively utilized, the actual kinetic energy recovery rate is high, which can reach more than 25%-30%, and the air guide volume is significantly increased. Under the condition that the motor power and the fan model are unchanged, the air volume is effectively increased, and the system resistance is reduced. The profile is composed of inclined line segments, vertical line segments and circular arc segments, which conforms to the principle of aerodynamics and helps to reduce airflow resistance. The wall of the tube is designed with equal strength, and the outlet end and the middle part are provided with ring-shaped reinforcing ribs, and the inlet end is provided with longitudinal uniformly distributed reinforcing ribs, etc., which improves the vibration and wind load resistance of the tube, and ensures the stability and safety of the tube under severe weather conditions.

[0044] In the embodiment, the air duct can not only discharge the hot air extracted by the fan to the outside of the tower to avoid the backflow of the hot air, but also can utilize the discharged air to recover the pressure in the tower and reduce the power of the fan. The air duct of the cooling tower adopts a high air duct with kinetic energy recovery, and the air volume is effectively increased under the condition that the motor power and the fan model are not changed. In the embodiment, the design of the air duct effectively reduces the resistance loss of the system. In addition, in order to further improve the adjustment flexibility of the system, a variable frequency motor is introduced to accurately control the fan. The cooling tower fan uses a large air volume glass steel fan, has a longer service life and a larger air volume, and does not need to adjust the angle of the fan and increase the load of the motor in the case that the cooling demand is high in summer. The fan works at the best speed according to the actual working condition, which not only reduces the energy consumption, but also improves the cooling effect. Through field test, the air duct of the utility model reduces the resistance while improving the adaptability of the whole cooling tower to the heat load, so that the system can also maintain high efficiency in high load operation.

[0045] In addition, considering the necessity of noise control, a soundproof wall is added to achieve effective noise reduction. Through the transformation of the air duct, the operation efficiency and environmental protection of the cooling tower are obviously improved, which provides a reference for the transformation of similar industrial cooling water tower systems and promotes the progress of the cooling water tower technology in energy saving and emission reduction.

[0046] In the embodiment, the water collector is a three-dimensional water collector. During the operation of the cooling tower, hot water is sprayed into small droplets through the spray head, and part of the small droplets is carried out of the cooling tower by the upward airflow after heat exchange with the air. The water collector is responsible for intercepting the small droplets carried by the airflow, reducing water resource waste and reducing the humidity of the surrounding air. The three-dimensional water collector used in the utility model has more than twice the surface area of a wave-shaped water collector, can well suppress water drift, and has twice the water collection efficiency of an ordinary water collector. The performance is more superior to that of a wave-shaped water collector under the condition of high air flow rate. The effect is very obvious when used in a counterflow tower. Under the condition of not increasing additional power consumption, the water collection efficiency can be improved and the water evaporation loss can be reduced.

[0047] In the embodiment, the frame structure 7 includes columns 71 and diagonal braces 72, the columns 71 are fixedly installed on the mounting seat 5 through fixing members, and the diagonal braces 72 are obliquely arranged between the columns 71 for reinforcement.

[0048] In the embodiment, the mounting seat 5 is a lattice-shaped cement beam, and the columns 71 and the diagonal braces 72 are glass steel square tubes. The fixing member is a base made of 316L material, and the base is fixed on the cement beam by bolts.

[0049] In this embodiment, the cooling tower frame structure is composed of glass steel. The glass steel material has good corrosion resistance, the cooling tower support columns and diagonal braces are glass steel square tubes, the columns are fixed to the pool bottom and the periphery by stainless steel anchors, there are 45 columns in total, of which 8 are directly fixed to the pool bottom. The stainless steel anchor fixing members are made of 316L material and are corrosion resistant, there are multiple diagonal braces in the vertical direction to ensure the stability of the entire tower body, the top deck 10 is relatively dense and provides good support. Stairs 9 are provided on the side to increase safety.

[0050] In this embodiment, the bases of the columns are connected to the original cement beams using expansion screws.

[0051] In this embodiment, one of the cores of the cooling water tower modification scheme is corrosion prevention treatment, which aims to prolong the service life of the equipment and ensure its stable operation under harsh working conditions. In terms of solving corrosion damage, especially to the metal components and filler systems inside the water tower, epoxy resin paint is used. This paint has strong chemical resistance and corrosion resistance, which can effectively block the contact between corrosive media and the metal surface. The metal supports and connecting pieces are subjected to expanded coating treatment to ensure uniform coating and no dead angle coverage; the cooling water tower shows superior corrosion resistance, providing a solid guarantee for stable operation of the equipment.

[0052] Compared with the existing cooling tower described in the background art, the utility model has the following advantages:

[0053] (1) Stable operation effect: the cooling tower modification is relatively stable after being put into use, there is no problem of filler blockage and fan damage, the spray head has good corrosion resistance and is not easy to block due to its large diameter.

[0054] (2) Obvious cooling effect:

[0055] Table 1 Comparison of circulating water inlet and outlet temperatures before and after modification

[0056]

[0057] (3) Energy saving: the optimization and modification of the filler and the pipeline reduce the energy consumption of the circulating water pump, the frequency of the 220KW main circulating water pump is reduced from 43Hz to 37Hz, and the current is reduced from 210A to 190A. The energy consumption is saved by about 90000KW per year; since the fan blades are made of glass steel material, the load of the fan is reduced, and combined with the modification of the air duct, under the condition that the system pressure remains unchanged, the frequency of the 30KW fan is reduced from 35Hz to 25Hz, and the current is reduced from 32A to 26A. The energy consumption is saved by about 27000KW per year. Before the modification, there were four 5.5KW axial flow fans, and the energy consumption was about 50000KW per year. Now the use of axial flow fans has been cancelled, and the energy consumption is saved by about 32000KW per year. When operating in different seasons, the frequency of the fan and the circulating water pump can be adjusted according to the on-site situation.

[0058] (4) Safety and environmental protection: The improvement of the overall frame structure and the use of stairs make daily inspection safer and regular maintenance more convenient, extending the service life. The use of variable frequency motors reduces the frequency and reduces noise pollution caused by motor rotation. The noise of the cooling tower mainly comes from the water droplets in the tower. In addition to the water droplets passing through the filler to reduce noise, the cooling tower is installed with a soundproof wall, so the water droplet noise generated by the water droplets in the cooling tower is further reduced. At the same time, due to the reduction of water droplets, the environmental pollution caused by water droplets is reduced. Through optimization and transformation, while meeting the requirements of production process design, the cooling effect, power consumption and maintenance cost have been improved to a certain extent, the safety has been increased, and certain economic and environmental protection benefits have been achieved.

[0059] (5) The cooling water tower of the present utility model has achieved remarkable results in performance improvement. Especially in reducing overall energy consumption and improving cooling efficiency, it has achieved the expected transformation target. At the same time, while saving energy, the cooling water tower of the present utility model also performs well in handling the loss caused by water evaporation, which is due to the design of the water collector, which not only minimizes the amount of lost water, but also effectively reduces the impact of water mist on the surrounding environment. The filler of the present utility model increases the heat exchange surface area, thereby improving the cooling capacity per unit of water. The water distribution system and the three-spray type sprinkler provide good conditions for the uniformity of water distribution, ensuring higher thermal efficiency and lower circulation loss. The air duct significantly reduces the airflow resistance and heat backflow phenomenon in the cooling tower, further promoting the rapid discharge of heat and the improvement of cooling efficiency. Finally, the use of corrosion-resistant coating protects the structure of the cooling tower, prolongs its service life, and reduces maintenance and replacement costs. In summary, the cooling water tower of the present utility model becomes more reliable, efficient and environmentally friendly, which not only meets the high standard requirements of industrial production, but also provides a clear direction for the optimization and transformation of similar cooling systems.

[0060] The above only describes the preferred embodiments of the present utility model and is not intended to limit the present utility model. Any modification, equivalent replacement and improvement made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A counterflow cooling tower characterized by: The application relates to a cooling tower, which comprises a frame structure (7) and a cooling tower body (1) arranged on the frame structure (7), wherein a wind cylinder (6), a water collector (8), a water distribution system (3) and a filler (4) are sequentially arranged on the cooling tower body (1) from top to bottom, the wind cylinder (6) is internally provided with a fan (2), the filler (4) comprises a filler layer with an S-shaped surface, the crest and the trough of the S-shaped surface are both arc-shaped, and the extension direction of the S-shaped surface is consistent with the water flow direction (X) and the air flow direction (Y).

2. A counterflow cooling tower according to claim 1, characterised in that: The filler (4) comprises three layers, and the height of each layer is 0.5-0.7 m.

3. A counterflow cooling tower according to claim 1, characterized in that: The water distribution system (3) comprises a water distribution pipe (31) and three splash type nozzles (32) communicated with the water distribution pipe (31).

4. A counterflow cooling tower according to claim 3, characterised in that: The height of the three splash type nozzles (32) from the filler (4) is 1.2-1.5 m, the outlet pressure of the three splash type nozzles (32) is 0.15-0.18 MPa, and the diameter of the water distribution pipe (31) is 200-220 mm.

5. A counterflow cooling tower according to claim 3, wherein: The water distribution pipe (31) is made of glass fiber reinforced plastic.

6. A counterflow cooling tower according to claim 1, characterized in that: The fan (2) is arranged in the wind cylinder (6), the wind cylinder (6) comprises a contraction section (61), a throat section (62) and a diffusion section (63) which are sequentially connected from bottom to top, and the fan (2) is connected with a variable frequency motor.

7. A counterflow cooling tower according to claim 6, characterised in that: The inlet and the outlet of the wind cylinder (6) are made of glass fiber reinforced plastic, the inlet of the wind cylinder (6) is provided with a longitudinal reinforcing rib, and the outlet and the middle part of the wind cylinder (6) are provided with annular reinforcing ribs.

8. A counterflow cooling tower according to claim 1, characterized in that: The water collector is a three-dimensional water collector.

9. A counterflow cooling tower according to claim 1 wherein: The frame structure (7) comprises vertical columns (71) and diagonal braces (72), the vertical columns (71) are fixedly installed on a mounting base (5) through fixing members, and the diagonal braces (72) are obliquely arranged between the vertical columns (71).

10. A counterflow cooling tower according to claim 9, characterized in that: The mounting base (5) is a lattice-shaped cement beam, and the vertical columns (71) and the diagonal braces (72) are both glass fiber reinforced plastic square tubes.

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