Simple cooling tower

Abstract

The invention discloses a simple cooling tower, and relates to the technical field of cooling towers. A simple cooling tower comprises a tower body, an annular groove is formed in the inner wall of the tower body, a plurality of water spraying holes are formed in the annular groove, the water spraying holes are evenly distributed in the circumferential direction of the annular groove, and each water spraying hole is provided with a spraying pipe. The water spraying direction of each spraying pipe faces the inner wall of the annular groove in the radial direction of the annular groove so that an annular water film surrounding the annular groove can be formed. A uniform water film can be formed, so that the cooling efficiency is improved.

Description

Technical Field

[0001] This application relates to the technical field of cooling towers, and in particular to a simplified cooling tower. Background Technology

[0002] Cooling towers, as the core cooling equipment in industrial circulating water systems, transfer heat through gas-liquid contact or air-metal contact. They are commonly used in power, chemical, metallurgical, and small-scale industrial applications, and their performance directly affects the energy efficiency and equipment stability of production systems. Typically, wet cooling towers, which utilize water evaporation to absorb heat and achieve cooling, are widely used in the power industry. Existing wet cooling towers mostly employ a direct-downward water distribution structure, spraying water from top to bottom through straight spray pipes or fixed nozzles. Due to the weight of the water flow and pipe resistance, the flow rate at the front nozzles is too high while the flow rate at the rear nozzles is insufficient. This results in significant differences in the thickness of the water film on the cooling tower surface. The thick film area experiences slow heat exchange, while the thin film area is prone to drying, forming blind spots in the water film coverage. This uneven water film distribution leads to uneven gas-liquid contact, resulting in low cooling efficiency. Summary of the Invention

[0003] In order to form a uniform water film and thus improve cooling efficiency, this application provides a simple cooling tower.

[0004] The simplified cooling tower provided in this application adopts the following technical solution: A simple cooling tower includes a tower body with an annular groove on the inner wall of the tower body. The annular groove has multiple water spray holes, which are evenly distributed around the circumference of the annular groove. Each water spray hole is equipped with a spray pipe, and the spray direction of each spray pipe is radially towards the inner wall of the annular groove to form an annular water film surrounding the annular groove.

[0005] By adopting the above technical solution, water can be sprayed radially towards the inner wall of the annular groove from multiple nozzles to form an annular water film surrounding the annular groove. The annular water film will fall along the inner wall of the tower and be evenly distributed. This application can form a uniform water film, thereby improving cooling efficiency.

[0006] Preferably, the water spraying direction of each of the nozzles is set along the tangential direction of the annular groove.

[0007] By adopting the above technical solution, it is easy to form a uniform annular water film on the inner wall of the annular groove.

[0008] Preferably, the bottom of the annular groove has a guiding slope, and the angle between the guiding slope and the inner wall of the tower body is 15°-30°.

[0009] By adopting the above technical solution, the guide slope can reliably and uniformly guide the annular water film in the annular groove to flow onto the inner wall of the tower.

[0010] Preferably, the inner wall of the tower body has a stepped section below the annular groove, the stepped section has a water outlet annular groove, and the tower body is equipped with a water collection box that communicates with the water outlet annular groove.

[0011] By adopting the above technical solution, water will enter the outlet ring groove and then reach the water collection box, which can collect the water.

[0012] Preferably, the stepped portion includes an inclined annular surface at the upper end, the water outlet annular groove is formed on the inclined annular surface, and a filter ring is installed on the inclined annular surface.

[0013] By adopting the above technical solution, the filter ring can prevent dirt from entering the water collection box. The dirt will accumulate on the inclined ring surface and eventually be washed away by the water.

[0014] Preferably, the tower body is equipped with swirl vanes and a drive mechanism connected to the swirl vanes. The swirl vanes are located inside the tower body and are used to guide the hot air entering the tower body from the top of the tower body to form a downward rotating flow trajectory, and the rotation direction of the hot air is opposite to the rotation direction of the annular water film.

[0015] By adopting the above technical solution, the driving mechanism can drive the swirl blades to rotate so that the hot air forms a downward rotating flow trajectory and the direction of hot air rotation is opposite to the direction of rotation of the annular water film, which can accelerate the cooling speed of the hot air.

[0016] Preferably, the drive mechanism includes a frame connected to the tower body and a rotating shaft rotatably connected to the frame body. Multiple swirl blades are provided, and the multiple swirl blades are connected to the rotating shaft. The rotating shaft is connected to a drive assembly.

[0017] By adopting the above technical solution, the drive component can drive the rotating shaft to rotate, thereby causing multiple swirl blades to rotate.

[0018] Preferably, each of the spray holes can be detachably fitted with a filter.

[0019] By adopting the above technical solution, the filter can prevent dirt carried by hot air from entering the water spray hole and clogging it.

[0020] Preferably, the annular groove is rotatably connected to an annular body, and the annular body is connected to a plurality of scrapers for scraping off dirt from the filter plate, and the spray pipe sprays water to drive the scrapers to rotate.

[0021] By adopting the above technical solution, water spraying based on multiple nozzles can drive the scraper to rotate, thereby continuously scraping away dirt from the surface of the filter and preventing clogging.

[0022] Preferably, the inner wall of the tower is equipped with a baffle plate to prevent hot air from entering the annular groove.

[0023] In summary, the present invention has at least one of the following beneficial technical effects: 1. Based on the principle that multiple nozzles spray water radially towards the inner wall of the annular groove to form an annular water film surrounding the annular groove, the annular water film will fall along the inner wall of the tower and be evenly distributed. This application can form a uniform water film, thereby improving cooling efficiency. 2. Water will enter the outlet ring groove and then reach the water collection box. The water collection box can collect water, and the filter ring can prevent dirt from entering the water collection box. The dirt will be accumulated on the inclined ring surface and eventually washed away by the water. 3. By driving the rotation mechanism, the swirl blades can be rotated so that the hot air forms a downward rotating flow trajectory and the direction of hot air rotation is opposite to the direction of rotation of the annular water film, which can accelerate the cooling speed of the hot air. 4. The filter can prevent dirt carried by hot air from entering the water spray hole and clogging it. The dirt will be blocked outside the filter. The water spray from multiple nozzles can drive the scraper to rotate and continuously scrape off the dirt on the surface of the filter, thereby preventing clogging. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a simplified cooling tower according to an embodiment of this application; Figure 2 This is a front sectional view used to illustrate a simplified cooling tower; Figure 3 It is a top sectional view used to show the location of the water spray holes; Figure 4 yes Figure 2 Enlarged view of the structure of part A in the middle.

[0025] The following are labels in the attached diagram: 1. Tower body; 11. Air inlet; 12. Air outlet; 13. Annular groove; 131. Guide slope; 132. Mounting groove; 14. Water spray hole; 15. Stepped section; 151. Inclined annular surface; 1511. Water outlet annular groove; 1512. Filter ring; 16. Water collection box; 2. Spray pipe; 3. Baffle plate; 4. Filter plate; 5. Ring body; 51. Scraper; 6. Drive mechanism; 61. Frame; 62. Rotating shaft; 63. Drive assembly; 7. Swirl blade. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are 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 element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0028] This application discloses a simple cooling tower. It is used to form a uniform water film, thereby improving cooling efficiency.

[0029] Reference Figure 1 and Figure 2 A simple cooling tower includes a tower body 1, which includes an air inlet 11 at the top and an air outlet 12 at the bottom. Hot air enters the tower body 1 through the air inlet 11 for cooling and is discharged through the air outlet 12.

[0030] Reference Figure 2 and Figure 3 The inner wall of the tower body 1 has an annular groove 13, and the annular groove 13 has multiple water spray holes 14. The multiple water spray holes 14 are evenly distributed around the annular groove 13. Each water spray hole 14 includes a flat-nozzle-shaped hole near one end of the annular groove 13. Each water spray hole 14 is equipped with a spray pipe 2. The spray pipe 2 is connected to an external water source to spray water into the annular groove 13. The spray direction of each spray pipe 2 is radially opposite to the inner wall of the annular groove 13. The spray direction of each spray pipe 2 is set along the tangential direction of the annular groove 13. In this embodiment, there are four water spray holes 14 and four spray pipes 2.

[0031] The four nozzles 2 spray water towards the inner wall of the annular groove 13 to form an annular water film around the annular groove 13. The annular water film will then fall along the inner wall of the tower body 1 and be evenly distributed. The water flow is closely attached to the inner wall of the tower body 1 due to centrifugal force. The water film is of uniform thickness. The hot air entering the tower body 1 will fully contact the annular water film and be cooled.

[0032] Compared to existing direct-fall water films, the rotating water film of this application suffers from several drawbacks. Direct-fall water flows at a high speed, resulting in short contact time between the water and the air inside the tower and insufficient heat exchange. The rotating water film, by changing the direction of the water flow, reduces the falling speed. Simultaneously, the rotational motion increases the water's travel distance, and the centrifugal force generated by the rotation makes the water film thinner, accelerating the evaporation rate and enhancing heat transfer between the water and air. This significantly improves heat exchange efficiency compared to direct-fall water films. Furthermore, the vertical drop of direct-fall water can cause significant impact on the bottom structure of the tower 1 or the structure below it, easily leading to component wear and generating noticeable water flow noise. The rotating water film flows smoothly along the wall, dispersing and weakening the impact force, resulting in less noise from the water flow impact. Therefore, this application operates more smoothly and quietly.

[0033] Reference Figure 2 and Figure 4 In order to prevent hot air from entering the annular groove 13 and affecting the formation of the annular water film, an annular baffle plate 3 is installed on the inner wall of the tower body 1 to block hot air from entering the annular groove 13. The baffle plate 3 is set vertically, and the lower end of the baffle plate 3 is higher than the bottom end of the annular groove 13.

[0034] Reference Figure 4The bottom of the annular groove 13 has a guiding slope 131, and the angle between the guiding slope 131 and the inner wall of the tower body 1 is 15°-30°. In this embodiment, the angle between the guiding slope 131 and the inner wall of the tower body 1 is 30°. The guiding slope 131 can reliably and uniformly guide the annular water film in the annular groove 13 to flow onto the inner wall of the tower body 1.

[0035] Reference Figure 3 Hot air may carry dirt into the tower body 1, and the dirt may mix with the water film. In order to prevent dirt from entering the spray hole 14, each spray hole 14 is fitted with a filter 4.

[0036] Reference Figure 3 and Figure 4 Excessive dirt may clog the filter element 4. To prevent the spray holes 14 from becoming clogged, the annular groove 13 has a T-shaped mounting groove 132. The mounting groove 132 is rotatably connected to the ring body 5. To ensure the rotational capability of the ring body 5, it is rotatably connected to the mounting groove 132 by multiple ball bearings. The ring body 5 is connected to multiple scrapers 51 for scraping dirt off the filter element 4. The scrapers 51 are made of lightweight materials such as aluminum alloy. The four spray nozzles 2 spray water towards the inner wall of the annular groove 13, which can drive the scrapers 51 to rotate slowly to scrape away dirt off the filter element 4. It should be noted that in order to prevent the filter element 4 from affecting the formation of the annular water film, the filter element 4 is selected with a larger mesh size. The filter element 4 only needs to prevent larger debris from entering the spray holes 14.

[0037] The scraper 51 of this application does not require a power structure. This application can achieve automatic and continuous dirt removal. The design of the non-powered scraper 51 reduces manufacturing costs and structural complexity.

[0038] Reference Figure 2 The inner wall of the tower body 1 has a stepped portion 15 below the annular groove 13. The stepped portion 15 includes an upper inclined annular surface 151, which has a water outlet annular groove 1511. A filter ring 1512 is installed on the inclined annular surface 151, which can prevent dirt from entering the water outlet annular groove 1511. A water collection box 16 communicating with the water outlet annular groove 1511 is installed on the tower body 1 by screws. The water collection box 16 can be disassembled for cleaning. Water can be recycled by using an external water pumping device to extract water from the water outlet annular groove 1511 and then pumping the water back into multiple spray pipes 2. The specific water pumping device and related structures are existing technology and will not be described in detail here.

[0039] Dirt will be blocked at the top of the filter ring 1512, and subsequent dirt will be flushed away by water until it falls off.

[0040] Reference Figure 2To further improve cooling efficiency, the tower body 1 is equipped with swirl vanes 7 and a drive mechanism 6 connected to the swirl vanes 7. The swirl vanes 7 are located inside the tower body 1 and are used to guide the hot air entering the tower body 1 from the top of the tower body 1 to form a downward rotating flow trajectory, and the rotation direction of the hot air is opposite to the rotation direction of the annular water film. Specifically, the drive mechanism 6 includes a frame 61 connected to the tower body 1 and a rotating shaft 62 rotatably connected to the frame 61. The rotating shaft 62 is coaxial with the tower body 1. Multiple swirl vanes 7 are provided. The specific structure of the swirl vanes 7 is prior art and will not be described in detail here. Multiple swirl vanes 7 are connected to the rotating shaft 62, and the rotating shaft 62 is connected to a drive assembly 63. The drive assembly 63 is, for example, a belt drive assembly, a sprocket and chain drive assembly, a gear drive assembly, etc. In this embodiment, the drive assembly 63 is a belt drive assembly.

[0041] The drive assembly 63 drives the rotating shaft 62 to rotate, which in turn drives multiple swirl blades 7 to rotate, allowing hot air to spiral downwards from the air inlet 11 and exit from the air outlet 12. The speed of the hot air flow depends on the rotation speed of the rotating shaft 62, and the direction of the spiral downward flow of the hot air is opposite to the flow direction of the annular water film. Of course, the rotation speed of the rotating shaft 62 should not be too high, otherwise the hot air will disrupt the formation of the water film.

[0042] The hot air spirals out from top to bottom, forming a counter-current spiral crossflow with the rotating downward water film. This relative motion breaks the laminar boundary layer at the air-water interface, significantly enhancing the turbulence of the air and water flow and reducing thermal resistance. At the same time, the spiral motion makes the contact path between the hot air and the water film more tortuous and the contact area larger, allowing the heat in the air to be absorbed more fully by the water film, thereby improving the cooling efficiency of this application.

[0043] If the circulating water contains a small amount of impurities or there is dust in the air inside the tower, the centrifugal force generated by the reverse spiral flow will throw these pollutants toward the water film. The rotating water film can quickly adsorb these impurities and carry them to the bottom of the tower for discharge, thus avoiding secondary pollution caused by the discharge of impurities with hot air.

[0044] The implementation principle of a simplified cooling tower in this application embodiment is as follows: The four nozzles 2 spray water towards the inner wall of the annular groove 13 to form an annular water film around the annular groove 13. The annular water film will then fall along the inner wall of the tower body 1 and be evenly distributed. The water flow is closely attached to the inner wall of the tower body 1 due to centrifugal force. The water film is of uniform thickness. The hot air entering the tower body 1 will fully contact the annular water film and be cooled.

[0045] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A simple cooling tower, characterized in that: The tower includes a tower body (1), the inner wall of which has an annular groove (13). The annular groove (13) has a plurality of water spray holes (14), which are evenly distributed around the annular groove (13). Each water spray hole (14) is equipped with a spray pipe (2), and the spray direction of each spray pipe (2) is radially towards the inner wall of the annular groove (13) to form an annular water film surrounding the annular groove (13).

2. A simplified cooling tower according to claim 1, characterized in that: The water spraying direction of each of the nozzles (2) is set along the tangential direction of the annular groove (13).

3. A simplified cooling tower according to claim 1, characterized in that: The bottom of the annular groove (13) has a guide slope (131), and the angle between the guide slope (131) and the inner wall of the tower body (1) is 15°-30°.

4. A simplified cooling tower according to claim 1, characterized in that: The inner wall of the tower body (1) has a stepped part (15) below the annular groove (13), the stepped part (15) has a water outlet annular groove (1511), and the tower body (1) is equipped with a water collection box (16) that communicates with the water outlet annular groove (1511).

5. A simplified cooling tower according to claim 4, characterized in that: The stepped portion (15) includes an inclined annular surface (151) at the upper end, the water outlet annular groove (1511) is opened on the inclined annular surface (151), and a filter ring (1512) is installed on the inclined annular surface (151).

6. A simplified cooling tower according to claim 1, characterized in that: The tower body (1) is equipped with a swirl vane (7) and a drive mechanism (6) connected to the swirl vane (7). The swirl vane (7) is located inside the tower body (1). The swirl vane (7) is used to guide the hot air entering the tower body (1) from the top of the tower body (1) to form a downward rotating flow trajectory, and the rotation direction of the hot air is opposite to the rotation direction of the annular water film.

7. A simplified cooling tower according to claim 6, characterized in that: The drive mechanism (6) includes a frame (61) connected to the tower body (1) and a rotating shaft (62) rotatably connected to the frame (61). Multiple swirl blades (7) are provided, and multiple swirl blades (7) are connected to the rotating shaft (62). The rotating shaft (62) is connected to a drive assembly (63).

8. A simplified cooling tower according to claim 1, characterized in that: Each of the spray holes (14) is detachably fitted with a filter (4).

9. A simplified cooling tower according to claim 1, characterized in that: The annular groove (13) is rotatably connected to an annular body (5), and the annular body (5) is connected to a plurality of scrapers (51) for scraping off dirt from the filter (4). The spray pipe (2) sprays water, which can drive the scrapers (51) to rotate.

10. A simplified cooling tower according to claim 1, characterized in that: The inner wall of the tower body (1) is equipped with a baffle plate (3) to prevent hot air from entering the annular groove (13).

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