High-efficiency heat exchange dry-wet combined closed cooling tower

Abstract

This invention relates to the field of cooling tower technology, and more particularly to a high-efficiency heat exchange dry-wet combined closed-loop cooling tower, comprising a dry cooling system disposed on both sides of the tower body, a wet cooling system disposed inside the tower body, and a hot-cold flow separation system disposed above the wet cooling system. The hot-cold flow separation system includes several sets of baffles erected above the wet cooling system, connecting plates disposed between the sides of the several sets of baffles, support plates disposed inside the tower body, turbulence units disposed between adjacent sets of baffles, and a power unit disposed inside the tower body. This invention can dynamically separate the rising wet cooling steam and the falling spray water, allowing them to flow separately. The two are separated and insulated, preventing heat transfer between the spray water and the wet cooling steam, thus avoiding an increase in the spray water temperature and ensuring the cooling effect of the spray water. This invention solves the technical problem that heat transfer occurs when spray water encounters wet cooling steam, leading to an increase in spray water temperature and a reduction in the cooling effect of the heat source fluid.

Description

Technical Field

[0001] This invention relates to the field of cooling tower technology, and more particularly to a high-efficiency heat exchange dry-wet combined closed cooling tower. Background Technology

[0002] A closed-circuit cooling tower is a cooling device whose main function is to absorb heat from a system (heat source) and release it into the atmosphere. Its key feature is the placement of a tubular heat exchanger inside the tower, where cooling is achieved through heat exchange between circulating air, spray water, and circulating water. Because it operates in a closed loop, it ensures the water quality remains uncontaminated, effectively protecting the main equipment and extending its service life. Existing integrated dry-wet combined closed-circuit cooling towers have the dry cooling section at the top of the wet cooling section. The heat source fluid is pre-cooled in the dry cooling section and then further cooled in the wet cooling section. After prolonged operation, the wet steam at the bottom is transferred to the dry cooling section, causing scaling on the fins and severely affecting their heat dissipation.

[0003] Patent document No. 2021233429441 discloses a combined dry and wet closed cooling tower, including a dry cooling section radiator, dry cooling section louvers, wet cooling section louvers, a fan unit, evaporator coils, a water collection tank, and a cooling tower body. The dry cooling section radiator is located on both sides of the upper part of the cooling tower body, and the dry cooling section louvers are connected to the dry cooling section radiator. The evaporator coils are horizontally arranged in the cooling tower body and located below the dry cooling radiator. The wet cooling section louvers are located on both sides of the evaporator coils. The fan unit is arranged at the top of the cooling tower body, and the water collection tank is arranged at the bottom of the cooling tower body. External water-using equipment is connected to the tube bundle inlet of the dry cooling section radiator through a cooling tower inlet pipe. The tube bundle outlet of the dry cooling section radiator is connected to the evaporator coils through a pipe. The evaporator coils are connected to the external water-using equipment through a cooling tower outlet pipe.

[0004] However, in actual use, the inventors discovered that during the process of rising wet and cold steam, heat transfer occurs when it encounters the spray water, causing the temperature of the spray water to rise during its descent, which reduces the cooling effect of the spray water on the heat source fluid. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by designing a high-efficiency heat exchange dry-wet combined closed-loop cooling tower. This tower dynamically separates the rising wet steam and the falling spray water, allowing them to flow independently. The two are separated and insulated, preventing heat transfer between the spray water and the wet steam. This avoids raising the temperature of the spray water and ensures its cooling effect. Thus, this invention solves the technical problem of heat transfer between the spray water and the wet steam, which leads to an increase in the temperature of the spray water and reduces the cooling effect of the heat source fluid.

[0006] To address the above technical issues, the following technical solution is adopted: A high-efficiency heat exchange dry-wet combined closed cooling tower includes a dry cooling system disposed on both sides of the tower body, a wet cooling system disposed inside the tower body, and a hot and cold flow distribution system disposed above the wet cooling system. The hot and cold flow distribution system includes several sets of partitions erected above the wet cooling system, connecting plates between the sides of the several sets of partitions, support strips inside the tower body, turbulence units between two adjacent sets of partitions, and a power unit inside the tower body. The hot and cold flow separation system is used to dynamically separate the rising wet and cold steam and the falling spray water inside the tower. The power unit drives several sets of baffles to move synchronously back and forth on the support plate through the connecting plate. An air rise channel for steam to rise is formed between two adjacent sets of baffles. The turbulence unit drives the steam inside the air rise channel to flow towards the dry cooling system on both sides.

[0007] Preferably, the bottom of the connecting plate is provided with several sets of rollers, and the connecting plate moves horizontally on the support plate by means of the rollers.

[0008] Preferably, the turbulence unit includes: A rotating rod is rotatably disposed between two sets of connecting plates, with both ends of the rotating rod passing through the connecting plates respectively, and several sets of fan blades symmetrically arranged on the rotating rod to generate airflow in opposite directions; A gear is provided at the end of the rotating rod, and a rack is provided on the support plate for driving the gear to rotate.

[0009] Preferably, the power unit includes: A shaft is rotatably disposed between two sets of support plates, and an eccentric wheel is provided on the shaft; A limiting block is slidably fitted on the circumference of the eccentric wheel, and the limiting block is disposed on the side of a set of outer partitions.

[0010] Preferably, the humidification system includes: A humidifier is installed inside the tower body, and the humidifier is equipped with layers of distributed heat exchange tubes. A heat insulation cavity, which is formed inside the partition, is used to temporarily store spray water; A water distribution pipe, several sets of the water distribution pipes are vertically arranged at the bottom of the partition, and the upper end of the water distribution pipe is connected to the heat insulation cavity; A water distribution ring is provided on the water distribution pipe via a connecting pipe, and the water distribution ring is sleeved on the heat exchange tube. A number of spray heads are arranged circumferentially on the inner wall of the water distribution ring, and the spray heads are connected to the water distribution pipe through connecting pipes.

[0011] Preferably, a scraper ring is provided on the inner wall of the water distribution ring, and several sets of spray heads are respectively located on both sides of the scraper ring.

[0012] Preferably, the humidification system further includes: A spray pipe is horizontally installed inside the tower body, and several sets of sliders are slidably fitted at the bottom of the spray pipe. The sliders are respectively installed on the top of the partition plate. A guide pipe is provided at the bottom of the slider. One end of the guide pipe is connected to the inside of the spray pipe through a hose, and the other end of the guide pipe extends into the heat insulation cavity of the partition. A water collection tank is located at the bottom of the tower body, and one end of the spray pipe is connected to the water collection tank through a circulating water pipe.

[0013] Preferably, the wet cooler is provided with a wet cooler inlet pipe and a wet cooler outlet pipe, and the top of the tower is provided with a first water collector and a fan.

[0014] Preferably, the dry cooling system includes: Heat exchange finned tubes are respectively disposed on both sides of the tower body; The second water collector is respectively installed on both sides of the tower body and located inside the heat exchange finned tube. The wet curtains are respectively installed on both sides of the tower body and located outside the heat exchange finned tubes.

[0015] Preferably, the heat exchange finned tube is provided with a dry cooling inlet pipe and a dry cooling outlet pipe, and one end of the dry cooling outlet pipe is connected to the wet cooling inlet pipe. The tower body is provided with a fluid inlet pipe and a fluid outlet pipe on its side wall. One end of the fluid inlet pipe is connected to the dry cooling inlet pipe, and one end of the wet cooling outlet pipe is connected to the fluid outlet pipe.

[0016] The beneficial effects of this invention are: (1) In this invention, by setting up a hot and cold flow separation system and a wet cooling system, on the one hand, the rising wet cooling steam and the falling spray water can be dynamically separated and flow separately. The two are separated and heat-insulated. The spray water is directly guided and sprayed onto the periphery of the heat exchange tube, and will not transfer heat with the wet cooling steam, thus avoiding the temperature rise of the spray water and ensuring the cooling effect of the spray water. On the other hand, it can drive the rising wet cooling steam to flow towards the dry cooling system on both sides. The humid air entering from the dry cooling system meets the steam, which reduces the temperature of the wet cooling steam and performs defogging treatment on the wet cooling steam, reducing the loss of water in the cooling tower. (2) In this invention, the scraper ring is fitted around the heat exchange tube by a gap. On the one hand, during the wet cooling process of the partition plate carrying the water distribution ring moving back and forth horizontally around the heat exchange tube, the scraper ring scrapes away the excess cooling water after the water film is formed on the outer wall of the heat exchange tube in time, ensuring that the water film thickness on the outer wall of the heat exchange tube is appropriate, accelerating the evaporation and heat transfer of the water film, and improving the cooling efficiency of the heat source fluid. On the other hand, the cooling water is directly guided to the periphery of each heat exchange tube through the water distribution pipe, connecting pipe, and water distribution ring. The cooling water temperature on the outer wall of each heat exchange tube is the same from the upper layer to the lower layer, which accelerates the cooling speed and improves the cooling effect of the heat source fluid.

[0017] In summary, this cooling tower has the advantages of good cooling effect and low moisture loss, and is especially suitable for the field of cooling tower technology. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a high-efficiency heat exchange dry-wet combined closed cooling tower.

[0020] Figure 2 This is a schematic diagram of the dry cooling system.

[0021] Figure 3 This is a schematic diagram of the internal structure of the tower.

[0022] Figure 4 for Figure 3 The front view of the structure.

[0023] Figure 5 This is a schematic diagram of a hot and cold water distribution system.

[0024] Figure 6 A schematic diagram of the transmission system for hot and cold water distribution.

[0025] Figure 7 This is a schematic diagram of the power unit.

[0026] Figure 8 This is a schematic diagram of the water distribution pipe structure.

[0027] Figure 9 This is a schematic diagram of the turbulence unit.

[0028] Figure 10 A schematic diagram of the transmission system for the operation of the turbulence unit.

[0029] Figure 11 This is a schematic diagram of the structure of the heat insulation cavity.

[0030] Figure 12 This is a schematic diagram of the water distribution ring structure.

[0031] Figure 13 This is a schematic diagram of the structure connecting the heat exchange tube and the heat exchange finned tube. Detailed Implementation

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] Example 1 like Figures 1-13 As shown, a high-efficiency heat exchange dry-wet combined closed cooling tower includes a dry cooling system 2 disposed on both sides of the tower body 1, a wet cooling system 3 disposed inside the tower body 1, and a hot and cold flow distribution system 4 disposed above the wet cooling system 3. The hot and cold flow distribution system 4 includes several sets of partitions 41 erected above the wet cooling system 3, connecting plates 42 arranged between the sides of the several sets of partitions 41, support strips 43 arranged inside the tower body 1, turbulence units 44 arranged between two adjacent sets of partitions 41, and power units 45 arranged inside the tower body 1. The hot and cold diversion system 4 is used to dynamically divert the rising wet and cold steam and the falling spray water inside the tower body 1. The power unit 45 drives several sets of baffles 41 to move synchronously back and forth on the support strip 43 through the connecting plate 42. An air rise channel for steam to rise is formed between two adjacent sets of baffles 41. The turbulence unit 44 drives the steam inside the air rise channel to flow towards the dry cooling system 2 on both sides.

[0034] It is worth mentioning that by placing the fins of the dry cooling section on both sides of the cooling tower, the steam from the wet cooling section does not pass through the dry cooling fins, thus completely solving the problem of fin scaling and fin damage.

[0035] In this embodiment, the combination of the hot and cold flow separation system 4 and the wet cooling system 3 enables the dynamic separation of rising wet cooling steam and falling spray water, allowing them to flow separately and insulated. The spray water is directly guided and sprayed onto the periphery of the heat exchange tube 311, preventing heat transfer with the wet cooling steam and avoiding an increase in spray water temperature, thus ensuring the cooling effect of the spray water. On the other hand, it drives the rising wet cooling steam to flow towards the dry cooling systems 2 on both sides. The humid air entering from the dry cooling system 2 meets the steam, reducing the temperature of the wet cooling steam and performing defogging treatment on the wet cooling steam, thereby reducing water loss from the cooling tower.

[0036] In detail, the heat source is diverted from the fluid inlet pipe 13 to the heat exchange finned tubes 21 of the dry cooling system 2 on both sides of the tower body 1. After the outside air is cooled by the wet curtain 23, the heat source fluid in the heat exchange finned tubes 21 is subjected to air cooling treatment. The heat source fluid then flows into the heat exchange tubes 311 of the wet cooling system 3. The heat source fluid flows downward along the layers of heat exchange tubes 311. Then, the water in the water collection tank 391 is cooled and filtered. The cooling water is then drawn by the existing high-pressure water pump through the circulating water pipe 392 to the spray pipe 37. The cooling water flows from the spray pipe 37, the guide pipe 39, the heat insulation chamber 411, the water distribution pipe 32, the connecting pipe 34, and the water distribution ring 33 to the spray head 35. The spray head 35 sprays water onto the outer circumference of the heat exchange tubes 311. Cooling water is supplied, and at the same time, the power unit 45 drives several sets of baffles 41 to move synchronously back and forth through the connecting plate 42. The baffles 41 drive the water distribution rings 33 to move horizontally back and forth along the heat exchange tube 311. The multiple horizontally distributed water distribution rings 33 cooperate to perform wet cooling on the entire heat exchange tube 311. At the same time, wet cooling steam rises from the air rise channel between two adjacent sets of baffles 41. The turbulence unit 44 drives the steam inside the air rise channel to flow towards the dry cooling system 2 on both sides. The steam meets the humid air entering from the dry cooling system 2 and exchanges heat, reducing the temperature of the wet cooling steam. Water droplets condense and fall. Then, the wet cooling steam passes through the first water collector 11 and escapes from the fan 12. The cooled heat source flows out from the fluid outlet pipe 14.

[0037] Furthermore, such as Figures 6-7 As shown, the power unit 45 includes: A shaft 451 is rotatably disposed between two sets of support plates 43. An eccentric wheel 452 is provided on the shaft 451. A motor 454 is provided on one set of support plates 43. The motor 454 is used to drive the shaft 451 to rotate. Limiting block 453, which is slidably fitted on the periphery of the eccentric wheel 452, and the limiting block 453 is disposed on the side of an outer set of partitions 41; The bottom of the connecting plate 42 is provided with several sets of rollers 421, and the connecting plate 42 moves horizontally on the support strip 43 by means of the rollers 421.

[0038] It should be noted that the distance that the power unit 45 drives the connecting plate 42 to move synchronously in one direction is greater than the distance between two adjacent sets of water distribution rings 33. This ensures that during the synchronous reciprocating movement of the connecting plate 42, the multiple horizontally distributed water distribution rings 33 cooperate to spray water to cover the length of a single heat exchange tube 311, thus preventing any sections of the heat exchange tube 311 from being missed and not being sprayed with cooling water.

[0039] In this embodiment, the power unit 45 can drive several sets of partitions 41 to move synchronously back and forth, and the operation is stable.

[0040] In detail, the motor 454 drives the shaft 451 to rotate the eccentric wheel 452. The two sets of eccentric wheels 452 drive the two outermost sets of partitions 41 to move synchronously through the limit block 453. The two outermost sets of partitions 41 move synchronously back and forth horizontally with the other partitions 41 through the connecting plate 42.

[0041] Furthermore, such as Figures 9-10 As shown, the turbulence unit 44 includes: A rotating rod 441 is rotatably disposed between two sets of connecting plates 42. Both ends of the rotating rod 441 pass through the connecting plates 42 respectively. Several sets of fan blades 442 that generate airflow in opposite directions are symmetrically arranged on the rotating rod 441. Gear 443 is disposed at the end of the rotating rod 441, and rack 444 is disposed on the support plate 43 for driving gear 443 to rotate.

[0042] In this embodiment, the turbulence unit 44 can drive the rising wet and cold steam to flow towards the dry cooling system 2 on both sides, and exchange heat with the humid air entering from the dry cooling system 2 to cool it down. This prevents the wet and cold steam from rising directly and escaping, which would result in excessive moisture loss. It also prevents the high-temperature steam from contacting the spray pipe 37 at the upper position, further preventing the spray water temperature from rising.

[0043] In detail, during the reciprocating movement of the connecting plate 42, the gear 443 moves horizontally and reciprocating synchronously on the rack 444. The rack 444 drives the gear 443 to rotate the rotating rod 441, and the rotating rod 441 drives the fan blades 442 to blow the rising wet and cold steam toward the dry cooling system 2 on both sides.

[0044] Furthermore, such as Figures 1-8 and Figures 11-13 As shown, the humidification system 3 includes: A humidifier 31 is installed inside the tower body 1, and the humidifier 31 is provided with layers of heat exchange tubes 311. A heat insulation cavity 411 is formed inside the partition 41, and the heat insulation cavity 411 is used to temporarily store spray water; Water distribution pipe 32, several sets of the water distribution pipe 32 are vertically arranged at the bottom of the partition 41, and the upper end of the water distribution pipe 32 is connected to the heat insulation cavity 411; Water distribution ring 33, the water distribution ring 33 is installed on the water distribution pipe 32 through the connecting pipe 34, and the water distribution ring 33 is sleeved on the heat exchange light tube 311; Spray head 35, several sets of the spray head 35 are arranged in a circumferential direction on the inner wall of the water distribution ring 33, and the spray head 35 is connected to the water distribution pipe 32 through the connecting pipe 34; Spray pipe 37 is horizontally arranged inside the tower body 1. Several sets of sliders 38 are slidably fitted at the bottom of the spray pipe 37. The sliders 38 are respectively arranged on the top of the partition plate 41. A guide pipe 39 is disposed at the bottom of the slider 38. One end of the guide pipe 39 is connected to the inside of the spray pipe 37 through a hose, and the other end of the guide pipe 39 extends into the heat insulation cavity 411 of the partition 41. A water collection tank 391 is located at the bottom of the tower body 1, and one end of the spray pipe 37 is connected to the water collection tank 391 through a circulating water pipe 392. The wet cooler 31 is provided with a wet cooler inlet pipe 312 and a wet cooler outlet pipe 313, and the top of the tower body 1 is provided with a first water collector 11 and a fan 12.

[0045] It should be noted that after the water in the collection tank 391 is cooled and filtered, the cooling water is drawn by the existing high-pressure water pump through the circulating water pipe 392 to the spray pipe 37. The flow path of the cooling water from the spray pipe 37, the guide pipe 39, the heat insulation chamber 411, the water distribution pipe 32, the connecting pipe 34, the water distribution ring 33 to the spray head 35 is closed. The high-pressure water pump draws the cooling water to the spray head 35 for direct spraying.

[0046] In this embodiment, the cooling water can be guided and sprayed onto the periphery of the heat exchange tube 311 by the wet cooler 31, avoiding heat transfer with the wet and cold steam and ensuring the stability of the cooling water temperature.

[0047] In detail, the blower 12 generates negative pressure inside the tower body 1. After the wet and cold steam passes through the first water collector 11, it escapes from the blower 12. The water in the water collection pool 391 is cooled and filtered, and then the high-pressure water pump draws the cooling water through the circulating water pipe 392 to the spray pipe 37. The cooling water flows from the spray pipe 37, the guide pipe 39, the heat insulation chamber 411, the water distribution pipe 32, the connecting pipe 34, and the water distribution ring 33 to the spray head 35. The spray head 35 sprays cooling water onto the outer circumference of the heat exchange tube 311.

[0048] Furthermore, such as Figures 1-2 and Figure 13 As shown, the dry cooling system 2 includes: Heat exchange finned tubes 21 are respectively disposed on both sides of the tower body 1; The second water collector 22 is respectively disposed on both sides of the tower body 1 and located inside the heat exchange finned tube 21. The wet curtain 23 is respectively disposed on both sides of the tower body 1 and located outside the heat exchange finned tube 21; The heat exchange finned tube 21 is respectively provided with a dry cooling inlet pipe 24 and a dry cooling outlet pipe 25, and one end of the dry cooling outlet pipe 25 is connected to the wet cooling inlet pipe 312. The side wall of the tower body 1 is provided with a fluid inlet pipe 13 and a fluid outlet pipe 14. One end of the fluid inlet pipe 13 is connected to the dry cooling inlet pipe 24, and one end of the wet cooling outlet pipe 313 is connected to the fluid outlet pipe 14.

[0049] It is worth mentioning that the function of the second water collector 22 is to prevent wet and cold steam from spreading to the heat exchange finned tube 21, and to avoid scaling on the fins and causing damage.

[0050] In this embodiment, the dry cooling system 2 can pre-cool the heat source fluid, thereby accelerating the cooling efficiency of the heat source fluid.

[0051] In detail, the heat source is diverted from the fluid inlet pipe 13 to two sets of heat exchange finned tubes 21. The outside air is cooled by the wet curtain 23 and then air-cooled by the heat source fluid in the heat exchange finned tubes 21. The heat source fluid flows from the dry cooling outlet pipe 25 into the heat exchange tube 311 of the wet cooling system 3. Finally, the cooled heat source fluid flows out from the outlet pipe 14.

[0052] Example 2 like Figure 6 and Figure 12 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 2 and Embodiment 1 is as follows: Furthermore, such as Figure 12 As shown, a scraper ring 36 is provided on the inner wall of the water distribution ring 33, and several sets of spray heads 35 are respectively located on both sides of the scraper ring 36. The size of the scraper ring 36 is just fitted around the heat exchange tube 311 with a gap, and the gap is the thickness of the water film generated by the spray water on the heat exchange tube 311.

[0053] It should be noted that wet cooling uses sprayed water as the cooling medium. The sprayed water forms a water film on the outer wall of the heat exchange tube 311, exchanging heat with the heat source fluid inside the tube. After absorbing heat, the temperature rises, and some of the cooling water vaporizes to form steam. The evaporation of the water carries away a large amount of heat, which is then blown out by the fan and discharged into the atmosphere. The cooling process mainly relies on the evaporation and heat transfer of the water film. If the water film is too thick, it will increase the thermal resistance; if the water film is too thin, dry walls will easily form, leading to scale formation. Properly controlling the thickness of the water film has a significant impact on the performance of the cooling tower.

[0054] It should also be noted that the spray heads 35 located on both sides of the scraper ring 36 on the inner wall of the water distribution ring 33 work alternately. During the process of the partition plate 41 carrying the water distribution ring 33 moving horizontally back and forth around the heat exchange tube 311, the spray head 35 on the side with the same moving direction as the scraper ring 36 works. That is, after the spray head 35 sprays cooling water on the outer wall of the heat exchange tube 311, the scraper ring 36 promptly scrapes away the excess cooling water after the water film is formed on the outer wall of the heat exchange tube 311, leaving a water film of appropriate thickness.

[0055] It is worth mentioning that the heat exchange tubes 311 are distributed in layers from top to bottom. In a conventional spray system design, after the spray water on the upper heat exchange tubes 311 completes heat exchange, it flows to the lower heat exchange tubes 311. This results in the spray water temperature on the upper heat exchange tubes 311 being lower and the spray water temperature on the lower heat exchange tubes 311 being higher. That is, the spray water temperature on the heat exchange tubes 311 gradually increases from the upper to the lower layers, resulting in poor cooling effect of the heat source fluid inside the lower heat exchange tubes 311.

[0056] In this embodiment, the scraper ring 36 is fitted around the heat exchange tube 311 with a gap. On the one hand, as the partition plate 41 moves horizontally back and forth around the heat exchange tube 311 with the water distribution ring 33, the scraper ring 36 promptly scrapes away excess cooling water after a water film forms on the outer wall of the heat exchange tube 311, ensuring that the water film thickness on the outer wall of the heat exchange tube 311 is appropriate, accelerating the evaporation and heat transfer of the water film, and improving the cooling efficiency of the heat source fluid. On the other hand, the cooling water is directly guided to the periphery of each heat exchange tube 311 through the water distribution pipe 32, connecting pipe 34, and water distribution ring 33. The cooling water temperature on the outer wall of each heat exchange tube 311 is the same from the upper layer to the lower layer, which accelerates the cooling speed and improves the cooling effect of the heat source fluid.

[0057] Example 3 like Figure 6 and Figure 12 As shown, components that are the same as or corresponding to those in Embodiment 1 are referred to using the same reference numerals as in Embodiment 1. For simplicity, only the differences from Embodiment 1 are described below. The difference between Embodiment 3 and Embodiment 1 is as follows: Furthermore, such as Figure 12 As shown, a scraper ring 36 is provided on the inner wall of the water distribution ring 33, and several sets of spray heads 35 are located on both sides of the scraper ring 36. The size of the scraper ring 36 is just enough to be interference-fitted onto the periphery of the heat exchange tube 311.

[0058] It should be noted that the spray heads 35 located on both sides of the scraper ring 36 on the inner wall of the water distribution ring 33 work alternately. During the process of the partition plate 41 carrying the water distribution ring 33 to move horizontally back and forth around the heat exchange tube 311, the spray head 35 on the side opposite to the direction of movement of the scraper ring 36 works. That is, after the scraper ring 36 scrapes away the dirt on the outer wall of the heat exchange tube 311, the spray head 35 sprays cooling water on the outer wall of the heat exchange tube 311 in a timely manner.

[0059] In this embodiment, the scraper ring 36 is interference-fitted onto the periphery of the heat exchange tube 311. During the wet cooling process, the partition plate 41 carrying the water distribution ring 33 moves horizontally back and forth around the heat exchange tube 311. The scraper ring 36 can scrape off the dirt on the outer wall of the heat exchange tube 311 in real time. The dirt on the outer wall of the heat exchange tube 311 can be cleaned without stopping the cooling operation, thus improving the heat exchange efficiency of the heat exchange tube 311.

[0060] In the description of this invention, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0061] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0062] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A high-efficiency heat exchange dry-wet combined closed-loop cooling tower, comprising a tower body, characterized in that, It also includes a dry cooling system installed on both sides of the tower body, a wet cooling system installed inside the tower body, and a hot and cold distribution system installed above the wet cooling system; The hot and cold flow distribution system includes several sets of partitions erected above the wet cooling system, connecting plates between the sides of the several sets of partitions, support strips inside the tower body, turbulence units between two adjacent sets of partitions, and a power unit inside the tower body. The hot and cold flow separation system is used to dynamically separate the rising wet and cold steam and the falling spray water inside the tower. The power unit drives several sets of baffles to move synchronously back and forth on the support plate through the connecting plate. An air rise channel for steam to rise is formed between two adjacent sets of baffles. The turbulence unit drives the steam inside the air rise channel to flow towards the dry cooling system on both sides.

2. The high-efficiency heat exchange dry-wet combined closed-loop cooling tower according to claim 1, characterized in that, The bottom of the connecting plate is provided with several sets of rollers, and the connecting plate moves horizontally on the support plate by means of the rollers.

3. The high-efficiency heat exchange dry-wet combined closed-loop cooling tower according to claim 1, characterized in that, The turbulence-disrupting unit includes: A rotating rod is rotatably disposed between two sets of connecting plates, with both ends of the rotating rod passing through the connecting plates respectively, and several sets of fan blades symmetrically arranged on the rotating rod to generate airflow in opposite directions; A gear is provided at the end of the rotating rod, and a rack is provided on the support plate for driving the gear to rotate.

4. A high-efficiency heat exchange dry-wet combined closed-loop cooling tower according to claim 1 or 3, characterized in that, The power unit includes: A shaft is rotatably disposed between two sets of support plates, and an eccentric wheel is provided on the shaft; A limiting block is slidably fitted on the circumference of the eccentric wheel, and the limiting block is disposed on the side of a set of outer partitions.

5. A high-efficiency heat exchange dry-wet combined closed-loop cooling tower according to claim 1, characterized in that, The humidification system includes: A humidifier is installed inside the tower body, and the humidifier is equipped with layers of distributed heat exchange tubes. A heat insulation cavity, which is formed inside the partition, is used to temporarily store spray water; A water distribution pipe, several sets of the water distribution pipes are vertically arranged at the bottom of the partition, and the upper end of the water distribution pipe is connected to the heat insulation cavity; A water distribution ring is provided on the water distribution pipe via a connecting pipe, and the water distribution ring is sleeved on the heat exchange tube. A number of spray heads are arranged circumferentially on the inner wall of the water distribution ring, and the spray heads are connected to the water distribution pipe through connecting pipes.

6. A high-efficiency heat exchange dry-wet combined closed-loop cooling tower according to claim 5, characterized in that, A scraper ring is provided on the inner wall of the water distribution ring, and several sets of spray heads are located on both sides of the scraper ring.

7. A high-efficiency heat exchange dry-wet combined closed-loop cooling tower according to claim 5, characterized in that, The humidification system also includes: A spray pipe is horizontally installed inside the tower body, and several sets of sliders are slidably fitted at the bottom of the spray pipe. The sliders are respectively installed on the top of the partition plate. A guide pipe is provided at the bottom of the slider. One end of the guide pipe is connected to the inside of the spray pipe through a hose, and the other end of the guide pipe extends into the heat insulation cavity of the partition. A water collection tank is located at the bottom of the tower body, and one end of the spray pipe is connected to the water collection tank through a circulating water pipe.

8. A high-efficiency heat exchange dry-wet combined closed-loop cooling tower according to claim 5, characterized in that, The wet cooler is equipped with a wet cooler inlet pipe and a wet cooler outlet pipe, and the top of the tower is equipped with a first water collector and a fan.

9. A high-efficiency heat exchange dry-wet combined closed-loop cooling tower according to claim 8, characterized in that, The dry cooling system includes: Heat exchange finned tubes are respectively disposed on both sides of the tower body; The second water collector is respectively installed on both sides of the tower body and located inside the heat exchange finned tube. The wet curtains are respectively installed on both sides of the tower body and located outside the heat exchange finned tubes.

10. A high-efficiency heat exchange dry-wet combined closed-loop cooling tower according to claim 9, characterized in that, The heat exchange finned tube is respectively provided with a dry cooling inlet pipe and a dry cooling outlet pipe, and one end of the dry cooling outlet pipe is connected to the wet cooling inlet pipe. The tower body is provided with a fluid inlet pipe and a fluid outlet pipe on its side wall. One end of the fluid inlet pipe is connected to the dry cooling inlet pipe, and one end of the wet cooling outlet pipe is connected to the fluid outlet pipe.

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