Closed-loop cooling tower air intake structure

Abstract

This invention belongs to the field of cooling tower technology, specifically relating to a closed-loop cooling tower air intake structure, including a tower body. The top wall of the tower body has a first air inlet, one side wall has a second air inlet, and the other side wall has an air outlet. A fan is fixedly installed at the air outlet, which is opposite to the second air inlet. A horizontal plate is installed at the first air inlet to cover it. The horizontal plate has several strip-shaped air inlet slots and several guide tubes corresponding to the strip-shaped air inlet slots. The guide tubes are vertically arranged, parallel to the gaps in the coils, and directly above the gaps in the coils. In this invention, the airflow entering the tower body through the guide tubes flows vertically within the gaps in the coils, ensuring that the airflow and spray water flow smoothly, parallelly, and downwards through the coils, avoiding the spray water being affected by the airflow and thus eliminating dry spots on the coils that are conducive to scale formation.

Description

Technical Field

[0001] This invention belongs to the field of cooling tower technology, specifically relating to a closed-loop cooling tower air intake structure. Background Technology

[0002] A cooling tower is a highly efficient cooling device that utilizes the contact between water and air to dissipate heat from process fluids through convection and evaporation, and then cools the hot water (whose temperature rises after absorbing waste heat) for reuse. In a closed-circuit cooling tower, the process fluid flows inside the coils, transferring heat to the outside of the coils through the coil walls. Simultaneously, water is sprayed outside the coils, forming a water film on the outer wall of the coils. Under the influence of air (there is an air inlet above the coils), heat and mass transfer occur outside the coils through evaporation, thus achieving heat transfer.

[0003] Currently, the most commonly used coil materials are stainless steel and copper tubing. The coils are in a reciprocating serpentine shape, typically formed by bending straight tubes. In use, the coils are installed horizontally inside the closed-circuit cooling tower. Outside air, driven by a fan, enters the tower through the air inlet, coming into contact with the water film on the outer wall of the coil and carrying away heat, thus achieving cooling. During this process, the downward airflow forms a unified airflow towards the coil. The coil, especially the windward side, is susceptible to airflow disturbance, leading to dry spots. These dry spots cause scaling, negatively impacting heat exchange efficiency. Summary of the Invention

[0004] The present invention aims to provide a closed-loop cooling tower air intake structure to solve the problem that air intake above the coils easily leads to scaling on the coils.

[0005] To achieve the above objectives, the present invention provides a closed-loop cooling tower air intake structure, comprising a tower body. The top wall of the tower body has a first air inlet, one side wall of the tower body has a second air inlet, and the other side wall of the tower body has an air outlet. A fan is fixedly installed at the air outlet. The air outlet is positioned opposite to the second air inlet. A horizontal plate is installed at the first air inlet to cover it. The horizontal plate has several strip-shaped air inlet slots and several guide tubes corresponding to the strip-shaped air inlet slots. The guide tubes are vertically arranged, and the gap between the guide tubes and the coil is parallel, with the guide tubes located directly above the gap of the coil.

[0006] The working principle and beneficial effects of this solution are as follows: In this solution, the air is discharged from the side of the tower body rather than the top. Therefore, the air entering the tower body through the second air inlet tends to flow horizontally. The air entering the tower body through the guide tube first flows vertically and then flows towards the air outlet. Furthermore, due to the special design of the guide tube, the airflow formed by the air entering the tower body through the guide tube flows vertically in the gap of the coil. This ensures that the airflow and the spray water flow through the coil in a smooth, parallel and downward path, avoiding the airflow flowing into the coil as a whole and avoiding the spray water being affected by the airflow. This eliminates dry spots on the coil that are conducive to scale formation, thereby reducing scale buildup on the coil.

[0007] Optionally, the top end of the air guide tube is higher than the top end of the tower body, and the top end of the air guide tube is more than 20cm higher than the top end of the tower body.

[0008] When the air guide length (length of the air guide in the direction of airflow) of the air guide duct is long enough, a stable parallel airflow can be formed. Therefore, this scheme places most of the air guide duct outside the tower body, thereby avoiding increasing the overall height of the tower body.

[0009] Optionally, the top of the tower body is provided with a stabilizing support, which includes a base and several inverted U-shaped frames, and the inverted U-shaped frames are provided with through channels for the wind guide tubes to pass through.

[0010] In this solution, a stable support frame is used to support and stabilize the air guide tube, preventing it from tipping over.

[0011] Optionally, a mounting frame is fixedly connected to the top of the tower body, and an air regulating plate is horizontally slidably connected to the top of the mounting frame. The bottom surface of the air regulating plate contacts the top of the air guide tube. Several strip-shaped air inlets are opened on the air regulating plate, and the strip-shaped air inlets can coincide with the top of the air guide tube.

[0012] In this scheme, by pushing the air regulating plate to slide horizontally, the degree of overlap between the strip air inlet and the top of the air guide tube can be changed, thereby changing the air volume of the first air inlet.

[0013] Optionally, the mounting frame is provided with a drive assembly for driving the air regulating plate to slide horizontally. The drive assembly includes a gear, a rack, and a drive motor that rotates with the drive gear. The rack and gear mesh, and the rack is fixedly connected to the air regulating plate. A control switch for controlling the drive motor is fixedly connected to the outer wall of the tower body.

[0014] In this solution, a control switch controls the drive motor, which in turn drives the gears. Because the rack and pinion mesh with the gears, the air regulating plate slides horizontally under the action of the rack, thus eliminating the need for workers to manually push the plate and reducing their workload. Furthermore, this solution eliminates the need for workers to climb to the top of the tower to adjust the air regulating plate's position, avoiding the risk of falls from heights and ensuring greater safety.

[0015] Optionally, an installation rod is fixedly connected to the outer wall of the tower body, and an observation mirror is fixedly connected to the end of the installation rod away from the tower body. The observation mirror is used to reflect the overlap between the strip-shaped air inlet and the top of the air guide tube.

[0016] In this solution, workers can stand on the ground and observe the alignment of the strip air inlet with the top of the guide tube by looking at the mirror reflected by the observation mirror. There is no need for workers to climb up to check, making the operation convenient and safe.

[0017] Optionally, the mounting rod is a gooseneck tube.

[0018] In this design, when the mounting rod is a gooseneck tube, the angle of the observation lens is adjustable, making it easier for workers to adjust the angle of the observation lens to view other parts of the air regulating plate.

[0019] Optionally, the tower body is provided with a vertically arranged wind baffle, the bottom end of which is located below the coil.

[0020] In this design, the baffle plate ensures that the air entering the tower through the air guide tube forms a downward airflow in the area where the coil is located, unaffected by horizontal airflow. Furthermore, the baffle plate also provides installation space for the cooling tower's water collector.

[0021] Optionally, an air intake grille is installed at the second air intake.

[0022] In this design, the air intake grille adopts a detachable sheet-like structure. By removing and installing the sheet-like panels of the air intake grille, the air intake area of ​​the second air intake can be adjusted, thereby adjusting the air intake volume of the second air intake.

[0023] Optionally, a rain shelter is provided above the wind guide tube, and a connecting rod is fixedly connected to the rain shelter. The end of the connecting rod away from the rain shelter is either placed on the ground or fixedly connected to the tower body.

[0024] In this solution, a rain shelter is used to protect the wind-guiding tube from wind and rain, preventing rainwater, packaging bags, and other garbage from entering the wind-guiding tube. Attached Figure Description

[0025] Figure 1 This is a front view of the air intake structure of the closed cooling tower in Embodiment 1 of the present invention;

[0026] Figure 2This is a longitudinal sectional view of the air intake structure of the closed cooling tower in Embodiment 1 of the present invention;

[0027] Figure 3 This is a top view of the air intake structure of the closed cooling tower in Embodiment 1 of the present invention (the rain shelter and water pump are not shown);

[0028] Figure 4 This is a top view of the air regulating plate after it has slid forward in Embodiment 1 of the present invention.

[0029] Figure 5 for Figure 4 Enlarged diagram of A in the middle;

[0030] Figure 6 This is a top view of the stabilizing bracket in Embodiment 1 of the present invention;

[0031] Figure 7 This is a front view of the air intake structure of the closed cooling tower in Embodiment 2 of the present invention. Detailed Implementation

[0032] The following detailed description illustrates the specific implementation method:

[0033] The markings in the accompanying drawings include: tower body 1, air outlet 101, fan 2, air inlet grille 3, sheet-like grid plate 301, horizontal plate 4, air guide tube 5, coil 6, rain shelter 7, connecting rod 8, base 9, inverted U-shaped frame 10, mounting frame 11, air regulating plate 12, strip-shaped air inlet 121, T-shaped slider 13, wind baffle 14, spray structure 15, packing material 16, water collection tray 17, water collector 18, water pump 19, water pipe 20, gear 21, rack 22, drive motor 23, control switch 24, mounting rod 25, observation mirror 26.

[0034] Example 1

[0035] This embodiment is basically as follows: Figure 1 and Figure 2 As shown: The closed cooling tower air intake structure includes a tower body 1. The top wall of the tower body 1 has a first air intake, the left side wall of the tower body 1 has a second air intake, and the right side wall of the tower body 1 has an air outlet 101. A fan 2 is fixedly installed at the air outlet 101. The air outlet 101 is arranged opposite to the second air intake. An air intake grille 3 is fixedly installed at the second air intake. The structure of the air intake grille 3 in this embodiment is described in Chinese patent document with announcement number CN219265113U and patent name "Cooling Tower Air Intake Grille 3". Thus, by disassembling and assembling the sheet-like grille 301, the air intake area of ​​the second air intake is adjusted, thereby adjusting the air intake volume of the second air intake.

[0036] A horizontal plate 4 is fixedly installed at the first air inlet to cover it. In this embodiment, the horizontal plate 4 is welded to the top wall of the tower body 1. Several strip-shaped air inlet slots are formed on the horizontal plate 4, and several guide tubes 5 corresponding to the strip-shaped air inlet slots are also provided on the horizontal plate 4. In this embodiment, the guide tubes 5 are welded into the corresponding strip-shaped air inlet slots. The guide tubes 5 are vertically arranged, with their bottom ends located inside the tower body 1 and their top ends located outside the tower body 1. The top end of the guide tube 5 is at least 20cm higher than the top end of the tower body 1. In this embodiment, the top end of the guide tube 5 is 30cm higher than the top end of the tower body 1. Figure 3 As shown, the gap between the air guide tube 5 and the coil 6 is parallel, and the air guide tube 5 is located directly above the gap of the coil 6. A rain shelter 7 is provided above the air guide tube 5, and a connecting rod 8 is fixedly connected to the rain shelter 7. The bottom end of the connecting rod 8 is either on the ground or fixedly connected to the tower body 1. In this embodiment, the bottom end of the connecting rod 8 is welded to the top wall of the tower body 1.

[0037] Combination Figure 1 and Figure 6 As shown, the top of the tower body 1 is provided with a stable support, which includes a base 9 and several inverted U-shaped frames 10. The base 9 is installed on the top wall of the tower body 1 by screws. The two ends of the inverted U-shaped frames 10 are integrally formed with the base 9. The inverted U-shaped frames 10 are provided with through channels for the wind guide tube 5 to pass through.

[0038] A mounting bracket 11 is fixedly connected to the top of the tower body 1. A regulating plate 12 is horizontally slidably connected to the top of the mounting bracket 11. Specifically, a T-shaped slider 13 is integrally formed on the bottom surface of the regulating plate 12, and a T-shaped groove is provided at the top of the mounting bracket 11 to slide and engage with the T-shaped slider 13. The bottom surface of the regulating plate 12 contacts the top of the air guide tube 5, combining... Figure 4 and Figure 5 As shown, the air regulating plate 12 has several strip-shaped air inlets 121. The number of strip-shaped air inlets 121 is the same as the number of air guide tubes 5. The strip-shaped air inlets 121 can overlap with the top of the corresponding air guide tube 5.

[0039] The tower body 1 is equipped with a vertically arranged air baffle 14, the bottom of which is located below the coil 6. Additionally, the tower body 1 contains a spray structure 15, packing material 16, a water collection tray 17, and a water collector 18. A water pump 19 and water pipes 20 are located outside the tower body 1. The spray structure 15 is located above the coil 6 and is used to spray spray water. The packing material 16 is located below the coil 6, and the spray water flows downwards into the packing material 16 to form a water film, facilitating heat exchange with the cold air entering the tower body 1 through the second air inlet, thereby cooling the spray water. The cooled spray water falls into the water collection tray 17 and is then pumped by the water pump 19 back to the spray structure 15 for re-spraying, thus achieving water recycling. The water collector 18 inside the tower body 1 collects water droplets carried by the humid, hot air (after the cold air absorbs heat) and separates them from the air, reducing water loss.

[0040] When in use, the fan 2 starts, and the air inside the tower body 1 flows out through the air outlet 101, thereby creating negative pressure at the first and second air inlets. Outside air enters the tower body 1 through the first and second air inlets. Specifically, the process of outside air entering the tower body 1 through the first air inlet is as follows: Outside air enters the guide tube 5 through the strip-shaped air inlet 121, forming a stable downward parallel airflow within the guide tube 5. Moreover, since the gap between the guide tube 5 and the coil 6 is parallel, and the guide tube 5 is located directly above the gap of the coil 6, the parallel airflow guided by the guide tube 5 flows downward within the gap of the coil 6. This ensures that the airflow and the spray water flow through the coil 6 in a smooth, parallel, and downward path, preventing the airflow from flowing into the coil 6 as a whole and preventing the spray water from being affected by the airflow. This eliminates dry spots on the coil 6 that are conducive to scale formation, thereby reducing scale buildup on the coil 6. In addition, outside air enters the tower body 1 through the second air inlet, forming a near-horizontal airflow in the packing 16 area of ​​the tower body 1, thereby carrying away the heat of the hot spray water that is distributed on the packing 16, and achieving cooling of the spray water.

[0041] During the above process, the baffle plate 14 inside the tower body 1 can ensure that the air entering the tower body 1 through the air guide tube 5 forms a downward airflow in the area where the coil 6 is located, which is not affected by the horizontal airflow, thereby avoiding the formation of a horizontal airflow in the area where the coil 6 is located, and thus avoiding the airflow affecting the spray water.

[0042] Furthermore, in this embodiment, the worker can horizontally slide the air regulating plate 12 to change the overlap between the strip-shaped air inlet 121 and the top of the air guide tube 5, thereby changing the air intake volume of the first air inlet. Moreover, the worker can change the air intake volume of the second air inlet by adjusting the number of sheet-like grid plates 301 of the air intake grille 3.

[0043] Example 2

[0044] The difference between this embodiment and Embodiment 1 is that: Figure 7As shown, the mounting bracket 11 is equipped with a drive assembly for driving the air regulating plate 12 to slide horizontally. The drive assembly includes a gear 21, a rack 22, and a drive motor 23 for driving the gear 21 to rotate. The rack 22 meshes with the gear 21, and the rack 22 is fixedly connected to the bottom surface of the air regulating plate 12. The length direction of the rack 22 is parallel to the strip-shaped air inlet 121 (e.g., the strip-shaped air inlet 121 is...). Figure 5 The length direction is perpendicular to the tower body 1. A control switch 24 for controlling the drive motor 23 is fixedly connected to the outer wall of the tower body 1. In addition, a mounting rod 25 is also fixedly connected to the outer wall of the tower body 1. An observation mirror 26 is fixedly connected to the top of the mounting rod 25. The observation mirror 26 is used to reflect the overlap between the strip-shaped air inlet 121 and the top of the air guide tube 5. In this embodiment, the mounting rod 25 is a gooseneck tube, which makes it easy for workers to adjust the angle of the observation mirror 26 so that workers can see the overlap between the strip-shaped air inlet 121 and the top of the air guide tube 5 reflected by the observation mirror 26 while standing on the ground.

[0045] In this embodiment, the worker stands on the ground and observes the reflection in the viewing mirror 26 to determine the alignment between the strip-shaped air inlet 121 and the top of the guide tube 5. When the airflow of the first air inlet needs adjustment, the worker controls the drive motor 23 to rotate forward or backward via the control switch 24, which in turn causes the gear 21 to rotate forward or backward. Since the gear 21 meshes with the rack 22, the rack 22 moves the air regulating plate 12 forward or backward, thereby changing the alignment between the strip-shaped air inlet 121 and the top of the guide tube 5, and thus adjusting the airflow of the first air inlet. Furthermore, during the adjustment of the airflow of the first air inlet, the worker can check the alignment between the strip-shaped air inlet 121 and the top of the guide tube 5 by looking at the mirror surface of the viewing mirror 26. Thus, in this embodiment, the worker does not need to climb to adjust or check the alignment between the strip-shaped air inlet 121 and the top of the guide tube 5, ensuring good safety.

[0046] The above are merely embodiments of the present invention. The invention is not limited to the fields covered by these embodiments. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can improve and implement this solution based on the guidance provided in this application and their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness or practicality of the invention. The scope of protection claimed in this application should be determined by the content of its claims. The specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A closed cooling tower air inlet structure, comprising a tower body, a first air inlet is formed in the top wall of the tower body, a second air inlet is formed in one side wall of the tower body, and an air outlet is formed in the other side wall of the tower body; a fan is fixedly installed at the air outlet; and a spraying structure and a coil pipe are arranged in the tower body. The air outlet is opposite to the second air inlet, a horizontal plate for covering the first air inlet is installed at the first air inlet, a plurality of strip-shaped air inlets are formed in the horizontal plate, a plurality of air guide square tubes corresponding to the strip-shaped air inlets are arranged on the horizontal plate, the air guide square tubes are vertically arranged, the air guide square tubes are parallel to the gaps of the coil pipes, and the air guide square tubes are vertically above the gaps of the coil pipes. The spraying structure is above the coil pipes, and the spraying structure is below the air guide square tubes, the air flow formed by the air entering the tower body through the air guide square tubes and the spraying water sprayed by the spraying structure flow through the coil pipes in a smooth, parallel and downward path.

2. The closed cooling tower air intake structure of claim 1, wherein: The top end of the air guide square tube is higher than the top end of the tower body by more than 20 cm.

3. The closed cooling tower air intake structure of claim 2, wherein: The top end of the tower body is provided with a stable support, the stable support comprises a base and a plurality of inverted U-shaped frames, and the inverted U-shaped frames are provided with penetrating channels for the air guide square tubes to penetrate.

4. The closed cooling tower air intake structure of claim 1, wherein: The top end of the tower body is fixedly connected with a mounting frame, the top end of the mounting frame is horizontally and slidingly connected with an air adjusting plate, the bottom surface of the air adjusting plate is in contact with the top end of the air guide square tube, a plurality of strip-shaped air inlets are formed in the air adjusting plate, and the strip-shaped air inlets can coincide with the top end of the air guide square tube.

5. The closed cooling tower air intake structure of claim 4, wherein: A driving assembly for driving the air adjusting plate to horizontally slide is arranged on the mounting frame, the driving assembly comprises a gear, a rack and a driving motor for driving the gear to rotate, the rack is engaged with the gear, and the rack is fixedly connected with the air adjusting plate.

6. The closed cooling tower air intake structure of claim 5, wherein: A control switch for controlling the driving motor is fixedly connected to the outer side wall of the tower body.

7. The closed cooling tower air intake structure of claim 6, wherein: An observation mirror is fixedly connected to the end of the mounting rod away from the tower body, and the observation mirror is used for reflecting the coincidence degree of the strip-shaped air inlets and the top end of the air guide square tube.

8. The closed cooling tower air intake structure of claim 1, wherein: The mounting rod is a goose neck pipe.

9. The closed cooling tower air intake structure of claim 1, wherein: A vertical air baffle is arranged in the tower body, and the bottom end of the air baffle is below the coil pipes.

10. The closed cooling tower air intake structure of claim 1, wherein: An air inlet grille is installed at the second air inlet. A rain shelter is arranged above the air guide square tube, the rain shelter is fixedly connected with a connecting rod, and the end of the connecting rod away from the rain shelter is grounded or fixedly connected with the tower body.

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