A water collector with a guide hole

Abstract

This utility model provides a water collector with guide holes, relating to the field of circulating cooling technology. It includes a base plate, a cylinder, and guide vanes. A circular hole is formed on the base plate. The bottom end of the cylinder is fixedly connected to the base plate and covers the circular hole. Multiple guide vanes are provided and distributed circumferentially on the inner wall of the cylinder. The guide vanes are spirally inclined along the airflow direction. The water collector also includes guide holes, which are formed on the base plate and spaced apart from the circular hole. The guide holes are located outside the cylinder and are through holes with a regular shape. This utility model enables uniform airflow distribution within the cooling tower, increases the effective water removal area of ​​the water collector, and does not affect the heat exchange effect of the cooling tower.

Description

Technical Field

[0001] This utility model relates to the field of circulating cooling technology, and more specifically, to a water collector with guide holes. Background Technology

[0002] Water conservation in thermal power plants focuses on the circulating cooling water in cooling towers. The main cause of water loss is the hot and humid airflow discharged from the cooling tower. Under the action of wind, small water droplets are carried out of the tower by the airflow and enter the atmosphere or drift on the ground, causing a large amount of water loss.

[0003] In related technologies, water droplets can usually be trapped by water collectors. For example, corrugated plate water collectors can reduce water loss. However, existing water collectors cannot achieve high water collection efficiency under low inlet and outlet pressure differences due to factors such as geographical environment. Utility Model Content

[0004] The problem this invention aims to solve is that existing water collectors cannot simultaneously balance inlet and outlet pressure difference and water collection efficiency.

[0005] To address the aforementioned problems, this utility model provides a water collector with guide holes, comprising a base plate, a cylinder, and guide vanes. The base plate has a circular hole, and the bottom end of the cylinder is fixedly connected to the base plate and covers the circular hole. Multiple guide vanes are provided and distributed circumferentially on the inner wall of the cylinder. The guide vanes are spirally inclined along the outflow direction of the airflow. The water collector also includes guide holes, which are opened on the base plate and spaced apart from the circular hole. The guide holes are located outside the cylinder and are through holes with a regular shape.

[0006] Optionally, the guide hole is a square hole.

[0007] Optionally, the ratio of the distance from the center of the guide hole to the center of the circular hole to the diameter of the circular hole is a first preset ratio, and / or the ratio of the size of the guide hole to the diameter of the circular hole is a second preset ratio.

[0008] Optionally, the cylinder is located at the center of the base plate, and the flow guide hole is located at the corner of the base plate.

[0009] Optionally, the first preset ratio is between 0.68 and 0.74.

[0010] Optionally, the first preset ratio is 0.73.

[0011] Optionally, the size of the guide hole is the side length of the square hole, and the second preset ratio is 0.075 to 0.13.

[0012] Optionally, the second preset ratio is 0.1.

[0013] Optionally, when the guide hole is a square hole, the side of the guide hole is inclined to the side of the base plate, and the two sides form a preset angle.

[0014] Optionally, the preset included angle is 45°.

[0015] Optionally, multiple guide vanes are provided and distributed in a circular array along the inner wall of the cylinder.

[0016] Optionally, the flow guide hole may also be detachably equipped with a sealing element.

[0017] The beneficial effects of this utility model of a water collector with guide holes are: It allows for customized installation of a water collector with guide holes according to the actual operating conditions of the cooling tower, adjusting the airflow speed inside the tower to achieve a more uniform airflow distribution, improving the uniformity of the fluid within the tower, and increasing the effective water removal area of ​​the water collector. Through the design of guide vanes within the cylinder, when droplets in the water vapor rise and encounter the spirally inclined guide vanes, the droplets change from a vertically rising state to a rotating turbulent state, increasing the probability of collision between droplets. Furthermore, the guide vanes are circumferentially distributed with multiple... This design extends the swirling path of water vapor in the radial direction, achieving water conservation. Furthermore, by setting guide holes on the bottom plate, and because the guide holes and circular holes are arranged alternately and maintain a regular shape (e.g., square), the faster airflow flowing out of the guide holes moves towards the circular holes to form a boundary layer, reducing the backflow vortex in the area between the guide holes and the circular holes, while reducing the airflow velocity inside the circular holes, increasing the collision time of the droplets, improving the water collection rate, reducing the maximum pressure difference of the flow field of the water collector, and not affecting the heat exchange effect of the cooling tower. Attached Figure Description

[0018] Figure 1 A three-dimensional schematic diagram of the water collector in an embodiment of this utility model is shown;

[0019] Figure 2 A top view of the water collector in an embodiment of this utility model is shown;

[0020] Figure 3 This diagram illustrates the structure of multiple water collector arrays working together in an embodiment of the present invention.

[0021] Figure 4 This invention presents a comparison diagram of the center velocity of water collectors with and without guide holes in embodiments of the present invention;

[0022] Figure 5 The pressure distribution values ​​on the central axis of the water collector with and without guide holes in this embodiment of the present invention are shown.

[0023] Figure 6A schematic diagram showing the variation of the maximum pressure difference and the highest velocity (flow field) with a first preset ratio in an embodiment of this utility model is shown;

[0024] Figure 7 This diagram illustrates how the maximum pressure difference and maximum velocity (flow field) vary with a second preset ratio in an embodiment of this invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Base plate; 2. Cylinder body; 3. Guide vane; 4. Guide hole; 5. Sealing component; 6. Round hole. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] In the attached diagram, the Z-axis represents the vertical direction, i.e., up and down, with the positive direction of the Z-axis representing up and the negative direction representing down. The X-axis represents the horizontal direction and is designated as the front and back position, with the positive direction of the X-axis representing the front and the negative direction representing the back. The Y-axis represents the left and right position, with the positive direction of the Y-axis representing the left and the negative direction representing the right. It should be noted that the aforementioned representations of the Z, Y, and X axes are merely for the convenience of describing this utility model 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 this utility model.

[0029] In the description of this specification, references to terms such as "embodiment," "one embodiment," and "one implementation" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or implementation is included in at least one embodiment or illustrative embodiment of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or implementation. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or implementations.

[0030] The water collector in related technologies can recover moisture from water vapor, but it also occupies internal space in the cooling tower, causing an additional increase in pressure drop. The better the swirling effect of the water collector, the higher the water collection rate, and the greater the pressure difference above and below the water collector. It also increases the heat exchange area of ​​the cooling tower, affecting the overall heat exchange performance. Furthermore, due to the uneven fluid environment inside the tower, droplets cannot completely change direction with the humid air in the internal channels of the water collector. Due to inertia, they collide with the channel walls, forming a liquid film. This liquid film flows back into the cooling tower under gravity. Only when the air velocity is high enough can the droplets be repositioned by inertia. When the air velocity in the water collector channel is too high, the liquid film formed on the channel wall will be broken by the airflow again, forming droplets and causing re-entrainment. This is called the upper limit of the water collector's operation. Therefore, the normal operation of the water collector has certain requirements on the air velocity. The optimal operating environment wind speed range for the water collector is 2.0m / s-4m / s. When the ambient wind speed exceeds 4m / s or is lower than 2m / s, the viscosity of the boundary layer droplets decreases, and the airflow on the surface of the water collector will experience boundary layer detachment. The ability of the droplets to swirl and create vortices in the water collector decreases, resulting in a weakened water-saving effect.

[0031] To solve the above technical problems, refer to Figures 1-2 As shown in the figure, this utility model embodiment proposes a water collector with a guide hole, including a base plate 1, a cylinder 2 and a guide vane 3. The base plate 1 has a circular hole 6. The bottom end of the cylinder 2 is fixedly connected to the base plate 1 and covers the circular hole 6. The cylinder 2 can be arranged concentrically with the circular hole 6, and the inner diameter of the cylinder 2 can be the same as the diameter of the circular hole 6.

[0032] The guide vanes 3 are provided in multiple ways and distributed circumferentially on the inner wall of the cylinder 2. The guide vanes 3 are spirally inclined along the outflow direction of the airflow. The water collector also includes a guide hole 4. The guide hole 4 is opened on the bottom plate 1 and is arranged at intervals with the circular hole 6. The guide hole 4 is located outside the cylinder 2 and is a through hole with a regular shape.

[0033] Specifically, when water collectors are used for water conservation in cooling towers, they are installed in the water removal layer of the cooling tower (above the packing layer, whose main function is to reduce the drift of a large number of fine water droplets carried in the hot and humid air discharged from the cooling tower, avoid water mist pollution and icing in the surrounding environment, and at the same time protect the environment and save water resources). Water vapor generally acts on the guide vane 3 from the front direction (Z-axis direction).

[0034] exist Figure 4 and Figure 5In the experiment, by setting the guide hole 4 and not setting the guide hole 4, it can be found that when the guide hole 4 is set, compared with not setting the guide hole 4, the pressure at the center of the water collector (i.e., the central axis of the cylinder 2 or the center of multiple guide vanes 3) can be reduced, while still obtaining a large central velocity (in the range of 2.0m / s-4m / s). Thus, the water collection effect is better while also taking into account a lower maximum pressure difference in the flow field (referring to the difference between the maximum pressure and the minimum pressure on the central axis of the water collector).

[0035] Due to differences in geographical environment, operating conditions, and design structure of the cooling tower, the uniformity of wind speed varies at different locations inside the cooling tower. Therefore, in practical applications, a water collector with guide holes 4 can be customized and installed according to the actual operating conditions of the cooling tower to adjust the wind speed inside the tower, making the wind speed distribution inside the tower more uniform, improving the uniformity of the fluid inside the tower, and increasing the effective water removal area of ​​the water collector.

[0036] By setting guide vanes 3 inside the cylinder 2, when droplets in water vapor rise and encounter the spirally inclined guide vanes 3, the droplets change from a vertically rising state to a rotating turbulent state, which increases the probability of collision between droplets. Furthermore, since there are multiple guide vanes 3 distributed circumferentially, the swirling path of water vapor is extended radially, achieving water saving. In addition, by setting guide holes 4 on the bottom plate 1, since the guide holes 4 and the circular holes 6 are arranged at intervals and maintain a regular shape (e.g., square), the faster airflow flowing out of the guide holes 4 moves towards the circular holes 6 to form a boundary layer, reducing the backflow vortex in the area between the guide holes 4 and the circular holes 6, while reducing the airflow velocity inside the circular holes 6, increasing the collision time of droplets, improving the water collection rate, reducing the maximum pressure difference of the flow field of the water collector, and not affecting the heat exchange effect of the cooling tower (in fact, it can improve the heat exchange effect because the reduction of pressure difference is beneficial to heat exchange).

[0037] like Figure 1 , Figure 2 and Figure 3 As shown, in an optional embodiment of this utility model, the guide hole 4 is a square hole.

[0038] Specifically, if the guide hole 4 is set to a regular structure such as a circle, it is also acceptable in some water collection scenarios where the requirements are not high. However, it should be noted that a circle will cause disturbance and affect the main fluid morphology of the water collector. A square guide hole accelerates through laminar flow. According to fluid design principles, a square shape has a better acceleration effect.

[0039] like Figure 1 and Figure 2As shown, in an optional embodiment of this utility model, the ratio of the distance from the center of the guide hole 4 to the center of the circular hole 6 to the diameter of the circular hole 6 is a first preset ratio, and / or the ratio of the size of the guide hole 4 to the diameter of the circular hole 6 is a second preset ratio.

[0040] like Figure 2 As shown, the design position and size of the guide hole 4 have a significant impact on the pressure drop and water collection rate of the water collector. When at least one of the first preset ratio and the second preset ratio is satisfied, the maximum pressure difference in the flow field of the water collector can be smaller, or the swirling effect of the water collector can be better. When the first preset ratio and the second preset ratio are set simultaneously, the maximum pressure difference in the flow field of the water collector can be smaller and the swirling effect of the water collector can be more prominent. Therefore, the maximum pressure difference in the flow field and the swirling effect of the water collector can be taken into account. The following will be explained in conjunction with detailed embodiments.

[0041] The design of the guide hole 4 needs to consider parameters such as the diameter D of the circular hole 6 of the water collector, the side length L of the base plate 1, the side length a of the guide hole 4, and the distance s from the center of the circular hole 6 to the center of the guide hole 4. Based on the test results of the water collection rate of the water collector product, the diameter D of the circular hole 6 of the water collector and the side length L of the base plate 1 were determined to be constant values. Therefore, a hole is made on the base plate 1. In order to ensure that there is a sufficiently large area for the hole on the base plate 1, the hole is set at the diagonal position of the base plate 1. Through experimental testing of different values ​​of the distance s between the center of the guide hole 4 and the center of the cylinder and the side length a of the guide hole 4, the following embodiment can be obtained.

[0042] Specifically, experiments have shown that setting one or more at each of the four corners of the base plate 1 can reduce pressure drop and also achieve a certain water absorption effect.

[0043] Furthermore, there is one flow guide hole 4, the cylinder 2 is located at the center of the bottom plate 1, and the flow guide hole 4 is located at the corner of the bottom plate 1.

[0044] Specifically, experiments have shown that while setting one at each of the four corners of the base plate 1 can reduce pressure drop, too many holes will reduce the swirling effect of the water collector, thereby reducing the water collection rate. It will also increase the complexity of processing and production, and reduce the strength of the base plate 1, making it prone to breakage. Therefore, the preferred number of guide holes is one.

[0045] like Figure 2 As shown, in an optional embodiment of the present invention, the first preset ratio is 0.68 to 0.74.

[0046] Specifically, the maximum pressure difference in the flow field of the water collector is greatly affected by the side length a of the guide hole 4. The larger the side length of the guide hole 4, the smaller the pressure difference between the top and bottom. This is because the guide hole 4 reduces the projected density of the water collector (the larger the opening area of ​​the bottom plate 1, the smaller its projected density). The area through which the airflow passes is larger, and the flow is smoother. Therefore, the maximum pressure difference in the flow field of the water collector is reduced. However, the larger the guide hole 4 is, the weaker the swirling effect of the water collector will be, which is not conducive to the swirling and coalescence of droplets, and the water collection rate will decrease.

[0047] Correspondingly, the distance s between the center of the guide hole 4 and the center of the cylinder also affects the maximum pressure difference and swirling effect of the water collector. When the distance s between the center of the guide hole 4 and the center of the cylinder is closer, the outlet velocity of the water collector is lower and the maximum pressure difference of the water collector is greater. When the distance s between the center of the guide hole 4 and the center of the cylinder is farther, although the velocity of the water collector increases, the maximum pressure difference of the water collector will also increase. This is because the boundary layer separates and forms a vortex region on the surface of the water collector, which will lead to an increase in the maximum pressure difference of the water collector.

[0048] Therefore, based on the experimental test results (see...) Figure 4 and Figure 5 Finally, the optimal ratio of the distance s between the center of the guide hole 4 and the center of the cylinder to the diameter D of the cylinder region was determined to be 0.68 to 0.74. This ratio can achieve a better maximum pressure difference in the flow field without being too large, and the corresponding vortex effect of the water collector is better. It can also be adapted and adjusted according to the working environment, and the appropriate parameters within this range can be used as the specific parameters for actual application.

[0049] like Figure 2 and Figure 6 As shown, preferably, the size of the guide hole 4 is the side length of the square hole, and the first preset ratio is 0.73.

[0050] Experiments showed that the optimal ratio for the first preset ratio was 0.7375, but in practice, it can be taken as 0.73 (or 0.74). Figure 6 The value of a / D = 0.1 is used to make the maximum pressure difference of the water collector relatively low, reaching 164 Pa. The maximum velocity (referring to the maximum velocity on the central axis of the water collector, that is, the highest velocity that the airflow can reach when passing through the water collector) is also relatively large, close to 16 m / s. While reducing the pressure difference (maximum pressure difference of the flow field) generated by the water collector, it will not affect the heat exchange effect of the cooling tower.

[0051] As an optional embodiment of this utility model, the second preset ratio is 0.075 to 0.13.

[0052] Specifically, while increasing the side length a of the guide hole 4 will reduce the maximum pressure difference in the flow field of the water collector and lower the pressure drop, it will also weaken the swirling effect of the water collector and reduce the water collection rate. Conversely, decreasing the side length a of the guide hole 4 will increase the maximum pressure difference in the flow field of the water collector and increase the energy consumption of the cooling tower. Therefore, considering both the pressure drop change and the swirling effect of the water collector, the optimal ratio of the side length a of the guide hole 4 to the diameter D of the circular hole 6 of the water collector is 0.075 to 0.13. This ratio can be adjusted according to the working conditions. Within this range, the appropriate parameter is used as the specific parameter for practical application.

[0053] like Figure 2 and Figure 7 As shown, preferably, the second preset ratio is 0.1.

[0054] Through experiments, the optimal ratio of the side length a of the guide hole 4 to the diameter D of the circular hole 6 of the water collector is 0.1. Figure 7 In the mean (taking s / D=0.74), the maximum pressure difference in the flow field of the water collector can be relatively low (reaching 160Pa), which will not affect the heat exchange effect of the cooling tower, while still maintaining a relatively large water collection velocity (close to 16m / s).

[0055] like Figure 2 As shown, in an optional embodiment of the present invention, the cylinder 2 is located at the center of the bottom plate 1. When the guide hole 4 is a square hole, the side of the guide hole 4 is inclined to the side of the bottom plate 1, and the two sides form a preset angle.

[0056] Specifically, since square holes are prone to cracks at their four corners when damaged by external forces, in order to prevent cracks from extending to the cylinder 2 area of ​​the water collector, the side of the guide hole 4 is spirally inclined to the side of the bottom plate 1 along the outflow direction of the airflow. That is, the side of the guide hole 4 is not parallel to the side of the bottom plate 1. In this way, when square holes are damaged by external forces, their cracks are less likely to extend to the cylinder 2 area, reducing the risk of impact on the cylinder 2, thereby ensuring the integrity of the main body of the cylinder 2 and the guide vane 3.

[0057] like Figure 2 As shown, preferably, the preset included angle is 45°.

[0058] Specifically, the angle between the side of the guide hole 4 and the side of the bottom plate 1 is designed to be 45°, and a design error of ±5° is generally allowed, which can ensure the structural safety of the cylinder 2.

[0059] like Figure 3 As shown, in an optional embodiment of the present invention, the guide vanes 3 are provided in multiple forms and are arranged in a circular array along the inner wall of the cylinder 2.

[0060] Specifically, guide vanes 3 are evenly arranged in a circle along the inner wall of the cylinder 2, with a fixed spacing between every two guide vanes 3. The sides of the guide vanes 3 are fixedly connected to the inner wall of the cylinder 2, making the guide vanes 3 inclined. All of the guide vanes 3 are inclined in the same direction (such as clockwise or counterclockwise). The guide vanes 3 can be in the shape of a spiral blade, and a gap is formed in the center of the multiple guide vanes 3. A gap is also formed between every two guide vanes 3. Thus, when the droplet rises, the droplet changes from a vertical rising state to a rotating turbulent state, increasing the probability of collision between droplets and achieving the purpose of water saving.

[0061] Furthermore, the base plate 1, cylinder 2, and guide vane 3 can be integrally molded by injection molding, simplifying the production process.

[0062] like Figure 3 As shown, in an optional embodiment of this utility model, the guide hole 4 may also be detachably equipped with a sealing element 5.

[0063] Specifically, the sealing component 5 can be installed on the guide hole 4 by embedding or by bolts and nuts. The sealing component 5 is a plug or baffle to ensure complete sealing of the guide hole 4 (of course, a water collector without a guide hole 4 can be used to adjust the wind speed and improve the efficiency of the water collector by increasing the effective water removal area). When the water collector is placed in the cooling tower, multiple water collectors are generally used. At this time, the multiple water collectors are arranged in an array. The multiple water collectors can be fixed by brackets and then placed in the water removal layer of the cooling tower. Due to the geographical location of the cooling tower, Different environments, operating conditions, and design structures of cooling towers result in varying wind speed uniformity at different locations within the cooling tower. Therefore, water collectors with guide holes 4 can be customized according to the actual operating conditions of the cooling tower (the water collectors with open guide holes 4 are installed in areas with slower flow rates within the cooling tower, such as near the tower wall). For locations where guide holes 4 are not required, the guide holes 4 are sealed using sealing components 5 to achieve overall wind speed regulation within the tower, resulting in a more uniform wind speed distribution and increased effective water removal area of ​​the water collector.

[0064] In this utility model, the design of the guide hole 4 can reduce the pressure difference generated by the water collector, reduce the energy consumption of the cooling tower, form a vortex to achieve water saving, and adjust the corresponding design size and determine whether to block it according to the working environment.

[0065] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

[0066] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. A catch basin having a flow guide aperture, characterized by, The device includes a base plate (1), a cylinder (2), and guide vanes (3). The base plate (1) has a circular hole (6). The end of the cylinder (2) is fixedly connected to the base plate (1) and covers the circular hole (6). The guide vanes (3) are provided in multiples and distributed circumferentially on the inner wall of the cylinder (2). The guide vanes (3) are spirally inclined along the outflow direction of the airflow. The water collector also includes a flow guide hole (4). The flow guide hole (4) is opened on the base plate (1) and is spaced apart from the circular hole (6). The flow guide hole (4) is located outside the cylinder (2) and is a through hole with a regular shape. The guide hole (4) is a square hole; The ratio of the distance from the center of the guide hole (4) to the center of the circular hole (6) to the diameter of the circular hole (6) is a first preset ratio, and / or the ratio of the size of the guide hole (4) to the diameter of the circular hole (6) is a second preset ratio; the first preset ratio is 0.68 to 0.74; the size of the guide hole (4) is the side length of the square hole, and the second preset ratio is 0.075 to 0.13; the first preset ratio is 0.68 to 0.74; the size of the guide hole (4) is the side length of the square hole, and the second preset ratio is 0.075 to 0.13; When the guide hole (4) is a square hole, the side of the guide hole (4) is inclined to the side of the base plate (1), and the two sides form a preset angle.

2. The catch basin with flow guide holes according to claim 1, wherein, The number of the guide holes (4) is at least one, the cylinder (2) is located at the center of the bottom plate (1), and the guide holes (4) are located at the corners of the bottom plate (1).

3. The catch basin with flow directing holes of claim 1 wherein, The first preset ratio is 0.

73.

4. The water collector with guide holes according to claim 1 or 3, characterized in that, The second preset ratio is 0.

1.

5. The water collector with a guide hole according to any one of claims 1-3, characterized in that, The flow guide hole (4) can also be detachably equipped with a sealing element (5).

Images