Large heat insulation air cooling tower

Abstract

The invention relates to the technical field of cooling equipment, in particular to a large heat insulation air cooling tower which comprises a tower body, a fan, air cooling tube bundles arranged in a V shape and a rotary wet curtain assembly with an adjustable angle. The wet curtain device adopts a dual-mode operation design, a wet curtain module is in a vertical state in summer, and spray water is provided through a spray pipe to spray the wet curtain module, so that the wet curtain module is cooled and humidified, and the heat exchange efficiency is improved; in non-summer, the wet curtain module is rotated to be in a shutter state, so that the ventilation quantity is increased, and static pressure is reduced. Therefore, the balance of annual efficient heat exchange and low water consumption is achieved, the annual operation water consumption is reduced by 30-50% compared with that of a traditional wet cooling tower, the summer heat exchange efficiency is improved by 15-25%, the non-summer ventilation quantity is increased by 10-20%, and the wet cooling tower is suitable for large cooling systems in the fields of electric power, chemical engineering and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling equipment, in particular to a large-scale adiabatic air cooling tower. BACKGROUND

[0002] The traditional air cooling tower is widely used in water shortage areas because it does not require a large amount of water resources, but its heat exchange efficiency significantly decreases in high-temperature environments in summer due to high dry-bulb temperature of air. Although the wet cooling tower has high heat exchange efficiency in summer, it has large water consumption throughout the year, and the fixed wet curtain structure hinders air flow in non-summer seasons, resulting in increased fan energy consumption due to increased static pressure of the tower body.

[0003] In the prior art, the fixed wet curtain design cannot meet the requirements of high-efficiency operation and water saving throughout the year, and has problems such as poor seasonal adaptability and high operating cost. SUMMARY

[0004] The present application aims to provide a large-scale adiabatic air cooling tower to solve the problems of poor seasonal adaptability and high operating cost of the air cooling tower in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a large-scale adiabatic air cooling tower, comprising a tower body, a fan, and an air cooling pipe bundle arranged at the top of the inner cavity of the tower body, a wind outlet is arranged at the center of the top surface of the tower body, the fan is installed in the wind outlet, the bottom of the side wall around the tower body is respectively provided with an air inlet, a rotating wet curtain assembly, comprising a plurality of wet curtain modules arranged in the air inlet in the vertical direction and a rotating drive member for driving the wet curtain modules to flip, a spray pipe is arranged on the upper side of each air inlet and is used to provide spray water for the wet curtain modules.

[0006] Preferably, the air cooling pipe bundle comprises V-shaped cavities arranged in parallel, a plurality of cooling pipes extending in the horizontal direction and having both ends respectively sleeved in the inner side of the V-shaped cavities, and pipe joints sleeved on the outer side of the V-shaped cavities.

[0007] Preferably, the outer wall of the cooling pipe is provided with fins.

[0008] Preferably, the included angle of the V-shaped cavity is 60-90°.

[0009] Preferably, the wet curtain module comprises a rectangular frame, a porous wet curtain arranged in the rectangular frame, rotating shafts vertically fixed to the middle of the two sides of the rectangular frame and rotatably connected with the two side walls of the air inlet, and connecting shafts vertically fixed to the bottom of the two sides of the rectangular frame, the rotating drive member comprises vertical rods arranged in parallel on the two sides of the wet curtain module, a plurality of parallel connecting rods with outer ends hingedly connected to the vertical rods and inner ends rotatably connected with the connecting shafts, a horizontal rod arranged in a horizontal direction below the air inlet, swing rods fixed to the horizontal rod near the outer sides of the two ends, linkage rods rotatably connected between the outer ends of the swing rods and the bottom ends of the vertical rods, and telescopic cylinders for pushing and pulling the end portions of the horizontal rod in a vertical direction.

[0010] Preferably, the outer side wall of the tower body is fixed with a fixed seat outside the top of the air inlet, the top of the piston cylinder of the telescopic cylinder is rotatably connected with the fixed seat, and the bottom end of the piston rod of the telescopic cylinder is rotatably connected with the end portion of the horizontal rod.

[0011] Preferably, the wet curtain module comprises a rectangular frame, a porous wet curtain arranged in the rectangular frame, and rotating shafts vertically fixed to the middle of the two sides of the rectangular frame, the rotating drive member comprises a frame body embedded in the air inlet, a plurality of shaft sleeves arranged in a vertical direction on one side wall of the inner cavity of the frame body and rotatably connected with the corresponding rotating shafts, and a synchronous belt transmission mechanism arranged in the other side inner cavity of the frame body and used for driving the corresponding rotating shafts to rotate.

[0012] Preferably, a plurality of synchronous pulleys corresponding to the shaft sleeves and fixedly sleeved with the rotating shafts are rotatably sleeved in the other side cavity of the frame body, a transmission belt is transmissionally connected between two adjacent synchronous pulleys in the up-down direction, and a servo motor for driving one of the synchronous pulleys to rotate is fixed to the outer wall of the side of the frame body corresponding to the synchronous pulley.

[0013] Preferably, a water connector is sleeved on the top of the rectangular frame, a water distribution pipe in communication with the inner end of the water connector is fixed in the horizontal direction in the inner cavity of the top of the rectangular frame, a plurality of atomizing nozzles for spraying water mist to the porous wet curtain are arranged on the bottom of the water distribution pipe, and the outer end of the water connector is connected with the spraying pipe through a hose.

[0014] Preferably, the distance between the adjacent atomizing nozzles on the bottom of the water distribution pipe is 150-200 mm, and the water pressure of the atomizing nozzles is 0.2-0.3 MPa.

[0015] Compared with the prior art, the present application has the following beneficial effects: 1. The large heat-insulating air cooling tower according to the present application is convenient to lower the temperature and increase the humidity of the air passing through the air cooling pipe bundle in summer through wet curtain + spray cooling and humidification, so that the heat exchange coefficient is increased by 15-25%; in non-summer, the wet curtain is rotated to the state of louvers, the ventilation cross-sectional area is increased by 30-40%, the static pressure is reduced by 15-25 Pa, and the fan energy consumption is reduced by 8-12%.

[0016] 2. The large heat-insulating air cooling tower according to the present application only sprays in summer, and the annual operation water consumption is reduced by 30-50% compared with the traditional wet cooling tower.

[0017] 3. The rotating driving member of the large heat-insulating air cooling tower according to the present application is convenient to control by a PLC system, so that the operation mode can be automatically switched according to the environmental temperature, that is, unattended and efficient operation is easily realized. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present application; Figure 2 It is a schematic diagram of the three-dimensional structure of the air cooling pipe bundle of the present application; Figure 3 It is a schematic diagram of the three-dimensional structure of the first embodiment of the wet curtain module of the present application; Figure 4 It is a schematic diagram of the three-dimensional structure of the second embodiment of the wet curtain module of the present application; Figure 5 It is a schematic diagram of the three-dimensional structure of the first embodiment of the rotating driving member of the present application; Figure 6 It is a schematic diagram of the three-dimensional structure of the second embodiment of the rotating driving member of the present application; Figure 7 It is a schematic diagram of the three-dimensional structure of the second embodiment of the rotating driving member of the present application; Figure 3 It is a schematic diagram of the enlarged structure of A in the present application.

[0019] In the figure: 1-tower body; 1.1-inlet; 1.2-outlet; 2-fan; 3-air cooling pipe bundle; 3.1-V-shaped cavity; 3.2-cooling pipe; 3.3-pipe joint; 4-spray pipe; 5-rotary wet curtain assembly; 5.1-wet curtain module; 5.1.1-rectangular frame; 5.1.2-porous wet curtain; 5.1.3-rotating shaft; 5.1.4-connecting shaft; 5.1.5-water joint; 5.1.6-water distribution pipe; 5.1.7-atomizing nozzle; 5.2-rotary drive; 5.2.1-vertical rod; 5.2.2-connecting rod; 5.2.3-cross rod; 5.2.4-swing rod; 5.2.5-linkage rod; 5.2.6-telescopic cylinder; 5.2.7-fixed seat; 5.2.8-frame; 5.2.9-shaft sleeve; 5.2.10-synchronous pulley; 5.2.11-transmission belt; 5.2.12-servo motor. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] Embodiment one, please refer to Figure 1 、 2 , 3, 5, 7, the present application provides a technical solution, a large heat-insulating air cooling tower, the tower body 1 adopts cylindrical or square column structure, the top surface of the tower body 1 is centrally provided with an air outlet 1.2, and the bottom of the peripheral side wall is respectively provided with an air inlet 1.1.

[0022] The fan 2 is installed in the air outlet 1.2, wherein the fan 2 is a large axial flow fan, and 1-4 fans 2 are arranged in the air outlet 1.2.

[0023] The air cooling pipe bundle 3 is arranged at the top of the inner cavity of the tower body 1. The air cooling pipe bundle 3 comprises V-shaped cavities 3.1 arranged in parallel, cooling pipes 3.2 extending in the horizontal direction and sleeved at both ends inside the V-shaped cavities 3.1, and pipe joints 3.3 sleeved outside the V-shaped cavities 3.1, wherein the included angle of the V-shaped cavities 3.1 is 60-90°. In order to improve the heat exchange efficiency, the outer wall of the cooling pipe 3.2 is provided with fins. One side of the pipe joint 3.3 is used for inflow of the medium to be cooled, and the other side of the pipe joint 3.3 is used for outflow of the medium to be cooled. When the medium to be cooled flows through the cooling pipe 3.2, heat exchange occurs between the pipe wall and the external air flow, so that the medium is cooled.

[0024] The spray pipe 4 is in a whole annular structure, arranged on the upper side of the air inlet 1.1, and used for providing spray water.

[0025] The rotary wet curtain assembly 5 comprises a plurality of wet curtain modules 5.1 arranged in the vertical direction in the air inlet 1.1 and a rotary drive 5.2 used for driving the wet curtain modules 5.1 to overturn.

[0026] The wet curtain module 5.1 comprises a rectangular frame 5.1.1, a porous wet curtain 5.1.2 arranged in the rectangular frame 5.1.1, rotating shafts 5.1.3 vertically fixed to the middle of both sides of the rectangular frame 5.1.1 and rotationally connected with the two side walls of the air inlet 1.1, and connecting shafts 5.1.4 vertically fixed to the bottom of both sides of the rectangular frame 5.1.1. The rotating driving member 5.2 comprises vertical rods 5.2.1 arranged in parallel on both sides of the wet curtain module 5.1, a plurality of parallel connecting rods 5.2.2 with outer ends hinged to the vertical rods 5.2.1 and inner ends rotationally connected with the connecting shafts 5.1.4, a horizontal rod 5.2.3 arranged horizontally below the air inlet 1.1, swing rods 5.2.4 fixed to the horizontal rod 5.2.3 near the outer sides of both ends, a linkage rod 5.2.5 rotationally connected between the outer end of the swing rod 5.2.4 and the bottom end of the vertical rod 5.2.1, and a telescopic cylinder 5.2.6 for pushing and pulling the end of the horizontal rod 5.2.3 in the vertical direction. The length of the swing rod 5.2.4 is shorter than the length of the connecting rod 5.2.2. A fixed seat 5.2.7 is fixed to the outer side wall of the tower body 1 above the air inlet 1.1, the top of the piston cylinder of the telescopic cylinder 5.2.6 is rotationally connected to the fixed seat 5.2.7, and the bottom end of the piston rod of the telescopic cylinder 5.2.6 is rotationally connected to the end of the horizontal rod 5.2.3. The telescopic cylinder 5.2.6 is selected from a pneumatic cylinder or an electric cylinder, and is controlled by a PLC control system. When the telescopic cylinder 5.2.6 is extended, the horizontal rod 5.2.3 is pushed downward, and the horizontal rod 5.2.3 drives the plurality of wet curtain modules 5.1 arranged vertically through the linkage mechanism composed of the swing rod 5.2.4, the linkage rod 5.2.5, the vertical rod 5.2.1 and the connecting rod 5.2.2, i.e. the wet curtain module 5.1 is converted into a shutter state.

[0027] Example two, please refer to Figure 1 、 2, 4, 6, 7, on the basis of embodiment one, the wet curtain module 5.1 and the rotating driving part 5.2 in the rotating wet curtain assembly 5 are modified as follows: the wet curtain module 5.1 comprises a rectangular frame 5.1.1, a porous wet curtain 5.1.2 arranged in the rectangular frame 5.1.1, and rotating shafts 5.1.3 vertically fixed to the middle of both sides of the rectangular frame 5.1.1; the rotating driving part 5.2 comprises a frame body 5.2.8 embedded in the air inlet 1.1, a plurality of shaft sleeves 5.2.9 arranged along the vertical side wall of the inner cavity of the frame body 5.2.8 and rotatably connected with the corresponding rotating shaft 5.1.3, and a synchronous belt transmission mechanism arranged in the other inner cavity of the frame body 5.2.8 and used for driving the corresponding rotating shaft 5.1.3 to rotate. The other inner cavity of the frame body 5.2.8 is rotatably sleeved with a plurality of synchronous pulleys 5.2.10 corresponding to the shaft sleeves 5.2.9 and fixedly connected with the rotating shaft 5.1.3. The transmission belt 5.2.11 is arranged between the upper and lower adjacent two synchronous pulleys 5.2.10. The outer wall of the frame body 5.2.8 corresponding to one side of the synchronous pulley 5.2.10 is fixedly connected with the servo motor 5.2.12 used for driving one of the synchronous pulleys 5.2.10 to rotate. The servo motor 5.2.12 is controlled by a PLC control system. The servo motor 5.2.12 can drive the plurality of wet curtain modules 5.1 arranged vertically to rotate simultaneously through the synchronous belt transmission mechanism composed of the synchronous pulleys 5.2.10 and the transmission belt 5.2.11, i.e., the wet curtain module 5.1 is converted into a shutter state. In addition, the synchronous belt transmission mechanism can also be in the form of gear transmission.

[0028] The porous wet curtain 5.1.2 is composed of two corrugated plates. The corrugated plates are made of PVC or hydrophilic fiber polymer material. The hydrophilic fiber layer is filled between the two corrugated plates.

[0029] The water connector 5.1.5 is sleeved on the top of the rectangular frame 5.1.1. The water distribution pipe 5.1.6 is fixedly arranged in the top inner cavity of the rectangular frame 5.1.1 in the horizontal direction and is in communication with the inner end of the water connector 5.1.5. The atomizing nozzles 5.1.7 for spraying water mist to the porous wet curtain 5.1.2 are arranged at the bottom of the water distribution pipe 5.1.6. The outer end of the water connector 5.1.5 is connected with the spray pipe 4 through a hose. The distance between the adjacent atomizing nozzles 5.1.7 at the bottom of the water distribution pipe 5.1.6 is 150-200 mm. The spraying water pressure of the atomizing nozzles 5.1.7 is 0.2-0.3 MPa. That is, the spray pipe 4 injects spraying water into the water distribution pipe 5.1.6 from the water connector 5.1.5 through the hose. The spraying water is sprayed to the porous wet curtain 5.1.2 through the atomizing nozzles 5.1.7 to maintain the humidity of the porous wet curtain 5.1.2. The hose connected between the spray pipe 4 and the water connector 5.1.5 has a certain length of surplus to meet the requirement of the rotating angle of the wet curtain module 5.1.

[0030] When the rotating drive 5.2 is controlled by a PLC system, the angle of the wet curtain is automatically adjusted according to the ambient temperature (switched to the vertical mode when the ambient temperature is greater than or equal to 30°C in summer, and switched to the louver mode when the ambient temperature is less than or equal to 10°C in winter). The water pump connected to the spray pipe 4 is synchronously associated with the PLC control system. In the summer mode, the spray mechanism is turned on, and the sprayed water is softened to prevent the wet curtain from being scaled. The spraying time is automatically adjusted according to the air temperature, and the stop spraying temperature can be set.

[0031] Working principle: summer mode (June-August): the wet curtain module 5.1 is driven by the rotating drive 5.2 to rotate to the vertical state (i.e., the angle with the vertical plane is 0°), and the water pump supplies water to the spray pipe 4. The spray water in the spray pipe 4 is injected into the water distribution pipe 5.1.6 through the hose from the water joint 5.1.5, and the spray water is sprayed to the porous wet curtain 5.1.2 through the atomizing nozzle 5.1.7. When the dry and hot air from outside passes through the porous wet curtain 5.1.2, heat and mass exchange occurs between the air and the water, and the temperature is reduced by 5-15°C. The reduced temperature is close to the wet-bulb temperature, and the relative humidity is increased to 70-80%. The low-temperature and high-humidity air enters the air-cooling pipe bundle 3 area and exchanges heat with the medium in the pipe, and the heat exchange coefficient is increased by 20-30% compared with the traditional air-cooling tower.

[0032] Non-summer mode (the rest of the year): the wet curtain module 5.1 is driven by the rotating drive 5.2 to rotate to an angle of 45° with the vertical direction (louver state), and the water supply to the spray pipe 4 is turned off. The outside air enters the inner cavity of the tower body 1 through the gap between adjacent wet curtain modules 5.1, and the ventilation cross-sectional area is increased by 30-40%. The static pressure in the tower body 1 is reduced by 15-25 Pa, and the energy consumption of the fan 2 is reduced by 10-15%. At the same time, the heat exchange area of the air-cooling pipe bundle 3 is fully utilized to ensure the cooling demand of the process medium.

[0033] It should be noted that, in the present text, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying any such actual relationship or order between these entities or actions. Moreover, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or apparatus.

[0034] Although embodiments of the present application have been shown and described, it will be understood by those having ordinary skill in the art that various changes, modifications, alternatives, and variations can be made thereto without departing from the principles and spirit of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large-scale insulated air-cooled tower, comprising a tower body (1), a fan (2), and an air-cooled tube bundle (3) disposed at the top of the inner cavity of the tower body (1), wherein an air outlet (1.2) is provided in the center of the top surface of the tower body (1), the fan (2) is installed in the air outlet (1.2), and air inlets (1.1) are respectively provided at the bottom of the four side walls of the tower body (1), characterized in that, Also includes: The rotating wet curtain assembly (5) includes a plurality of wet curtain modules (5.1) arranged vertically within the air inlet (1.1) and a rotating drive (5.2) for driving the wet curtain modules (5.1) to rotate. A spray pipe (4) is provided on the upper side of each of the air inlets (1.1) and is used to provide spray water to the wet curtain module (5.1).

2. A large-scale insulated air-cooled tower according to claim 1, characterized in that: The air-cooled tube bundle (3) includes a V-shaped chamber (3.1) arranged in parallel, a number of cooling tubes (3.2) extending horizontally and having their ends respectively sleeved inside the V-shaped chamber (3.1), and a tube joint (3.3) sleeved outside the V-shaped chamber (3.1).

3. A large-scale insulated air-cooled tower according to claim 2, characterized in that: The cooling pipe (3.2) has fins on its outer wall.

4. A large-scale insulated air-cooled tower according to claim 2, characterized in that: The included angle of the V-shaped chamber (3.1) is 60-90°.

5. A large-scale insulated air-cooled tower according to claim 1, characterized in that: The wet curtain module (5.1) includes a rectangular frame (5.1.1), and components disposed within the rectangular frame (5.1.1). The structure includes a perforated wet curtain (5.1.2) within 5.1.1, a rotating shaft (5.1.3) vertically fixed to the middle of both sides of the rectangular frame (5.1.1) and rotatably sleeved with the side walls of the air inlet (1.1), and a connecting shaft (5.1.4) vertically fixed to the bottom of both sides of the rectangular frame (5.1.1). The rotating drive component (5.2) includes vertical rods (5.2.1) parallel to both sides of the wet curtain module (5.1), with the outer end hinged to the vertical rod (5.2.1) and the inner end connected to the... The connecting shaft (5.1.4) is rotatably connected to multiple parallel connecting rods (5.2.2), a horizontal bar (5.2.3) located horizontally below the air inlet (1.1), a swing rod (5.2.4) fixed to the outer side of the horizontal bar (5.2.3) near both ends, a linkage rod (5.2.5) rotatably connected between the outer end of the swing rod (5.2.4) and the bottom end of the vertical rod (5.2.1), and a telescopic cylinder (5.2.6) that pushes and pulls the end of the horizontal bar (5.2.3) vertically.

6. A large-scale insulated air-cooled tower according to claim 5, characterized in that: The outer wall of the tower body (1) is fixed with a fixed seat (5.2.7) located on the outer side of the top of the air inlet (1.1). The top of the piston cylinder of the telescopic cylinder (5.2.6) is rotatably connected to the fixed seat (5.2.7), and the bottom end of the piston rod of the telescopic cylinder (5.2.6) is rotatably sleeved on the end of the crossbar (5.2.3).

7. A large-scale insulated air-cooled tower according to claim 1, characterized in that: The wet curtain module (5.1) includes a rectangular frame (5.1.1), and components disposed within the rectangular frame (5.1.1). The perforated wet curtain (5.1.2) inside 5.1.1) and the rotating shaft (5.1.3) vertically fixed to the middle of both sides of the rectangular frame (5.1.1), the rotating drive (5.2) includes a frame (5.2.8) nested in the air inlet (1.1), a plurality of bushings (5.2.9) vertically disposed on one side wall of the inner cavity of the frame (5.2.8) and rotatably sleeved with the corresponding rotating shaft (5.1.3), and a synchronous belt drive mechanism disposed in the inner cavity of the other side of the frame (5.2.8) for driving the corresponding rotating shaft (5.1.3) to rotate.

8. A large-scale insulated air-cooled tower according to claim 7, characterized in that: The other cavity of the frame (5.2.8) is rotatably fitted with a plurality of synchronous pulleys (5.2.10) that correspond one-to-one with the bushing (5.2.9) and are fixedly connected to the rotating shaft (5.1.3). A transmission belt (5.2.11) is connected between two adjacent synchronous pulleys (5.2.10). A servo motor (5.2.12) is fixed on the outer wall of the frame (5.2.8) on the side corresponding to the synchronous pulley (5.2.10) to drive one of the synchronous pulleys (5.2.10) to rotate.

9. A large-scale insulated air-cooled tower according to any one of claims 5 or 7, characterized in that: The top of the rectangular frame (5.1.1) is fitted with a water connector ( 5.1.5), the top inner cavity of the rectangular frame (5.1.1) is fixed with a water distribution pipe (5.1.6) that communicates with the inner end of the water connector (5.1.5). The bottom of the water distribution pipe (5.1.6) is equipped with a plurality of atomizing nozzles (5.1.7) for spraying water mist onto the porous wet curtain (5.1.2). The outer end of the water connector (5.1.5) is connected to the spray pipe (4) through a flexible hose.

10. A large-scale insulated air-cooled tower according to claim 9, characterized in that: The distance between the bottom of the water distribution pipe (5.1.6) and the atomizing nozzle (5.1.7) is 150-200mm, and the spray water pressure of the atomizing nozzle (5.1.7) is 0.2-0.3MPa.

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