Natural ventilation wet cooling tower coupling rain area drifting inhibition and air inlet flow field optimization

Abstract

A natural ventilation wet cooling tower coupling rain area drifting inhibition and air inlet flow field optimization comprises a cooling tower and a rain area drifting inhibition device. The rain area drifting restraining device comprises a circumferential air control device and a top air control device, wherein the circumferential air control device is formed by air control anti-drifting plates which are vertically arranged on the air section on the periphery of the tower on the outer side of the air inlet. Through the synergistic effect of the rain area drifting restraining device, circumferential cross ventilation of the side wind area of the cooling tower is turned into the tower, so that the situation that environment wind blows rain area drifting drifts of the side wind area of the cooling tower out of the air inlet is restrained, the wind blowing loss of the rain area is reduced, and the radial effective air inlet amount of the cooling tower is increased. The air control anti-floating plates are further provided with ventilation vortex eliminating areas, transverse vortexes in a flow channel between the two air control anti-floating plates can be reduced, and therefore the air inlet resistance is reduced, and the radial effective air inlet amount is further increased. The top air control device is of an annular anti-floating flow guide flat plate structure surrounding the tower by one circle, and floating drops above the air inlet can be prevented from losing. Furthermore, a non-crosswind section rain area drifting inhibition device can be included to adapt to the change of the environmental wind direction.

Description

Technical Field

[0001] This utility model belongs to the field of cooling tower technology, and specifically relates to a natural ventilation wet cooling tower that couples raindrop suppression and inlet airflow field optimization. Background Technology

[0002] As a primary cold-end device in power plants, the performance of natural draft cooling towers directly impacts the overall operation of the unit. During operation, the cooling water comes into direct contact with the air. Due to crosswinds, water droplets can be blown out of the cooling water in the rain zone and onto the outside of the collection pool, resulting in a loss of cooling water and reducing the cooling tower's performance. Furthermore, the various chemical treatments applied to the cooling water during operation make it corrosive, polluting the surrounding land. When the cooling water is seawater, its high salinity can cause salinization at the droplet landing sites. Summary of the Invention

[0003] To address the problems existing in the prior art, a natural ventilation wet cooling tower that couples raindrop suppression and inlet airflow field optimization is provided.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a natural ventilation wet cooling tower that couples raindrop suppression and inlet airflow field optimization, including a cooling tower and a raindrop suppression device, characterized in that: the cooling tower is a natural ventilation wet cooling tower, including a tower body, an air inlet, packing, a rain zone, and a water collection pool; the raindrop suppression device includes a circumferential wind control device and a top wind control device, arranged on the side wind section of the tower outside the air inlet; when the ambient wind blows through the side wind area of ​​the cooling tower, through the synergistic effect of the raindrop suppression device, the circumferential through wind in the side wind area of ​​the cooling tower is turned into the tower, thereby suppressing the ambient wind from blowing raindrops from the side wind area of ​​the cooling tower out of the air inlet, reducing the wind loss in the rain zone, and increasing the effective radial air intake of the cooling tower.

[0005] The tower body of the natural ventilation cooling tower has a hyperbolic structure; the air inlet is located between the bottom of the hyperbolic structure of the tower body and the water collection tank; the packing material is located inside the tower body, at a certain distance above the air inlet; the rain zone is located directly below the packing material and directly above the water collection tank, in the area inside its air inlet, which is either an empty area or has a cross-shaped windbreak wall installed therein, with a radius of Ry; the water collection tank is located directly below the rain zone, with a radius of Rs.

[0006] The height of the circumferential air control device is H, and the height of the cooling tower air inlet is Hj; the height of the circumferential air control device .

[0007] The spacing between the wind control and anti-sway plates along the radial direction of the tower is Wd, and 0.5m ≤ Wd ≤ 6.0m.

[0008] The drift distance of the raindrops under the action of the design ambient wind speed vs in the cooling tower is Lpd, which is the product of the raindrop's fall time t and the design ambient wind speed vs; the adjacent spacing of the wind control and anti-drift plates is Kd, which is used when the design ambient wind speed vs ≥ 5m / s. .

[0009] The wind control and anti-slip plate has a flat plate structure, which can redirect the circumferential through-wind in the side wind area of ​​the cooling tower into the tower.

[0010] Furthermore, the structure of the wind control and anti-sway plate can be one or more of the following: flat plate, corrugated plate, or arc-shaped plate, and can be arranged in layers in the vertical, radial, or any direction.

[0011] Furthermore, the wind control and anti-drift plate may also be provided with a permeable and vortex-eliminating area; the permeable and vortex-eliminating area has air permeability and effectively reduces the transverse vortex in the flow channel, reduces the air intake resistance, increases the radial air intake of the cooling tower, and optimizes the uniformity and stability of the air intake flow field; the permeable and vortex-eliminating area is arranged on the wind control and anti-drift plate, and its opening ratio is 0% ≤ η ≤ 100%.

[0012] The top air control device has an outer end that overlaps with the top of the circumferential air control device, and an inner end that connects to the outer wall of the tower, forming a ring-shaped flat plate structure arranged around the tower; the height of the inner end of the top air control device is... .

[0013] Furthermore, the aforementioned raindrop suppression device can also be arranged in the non-crosswind section around the air inlet of the cooling tower to adapt to changes in the ambient wind direction.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: The raindrop suppression device includes a circumferential wind control device and a top wind control device composed of wind control and anti-drip plates. When the ambient crosswind flows through the raindrop suppression device, the flow direction of the ambient crosswind changes from crosswind to radial along the cooling tower, thereby reducing the direct effect of the ambient crosswind on the rain area and suppressing the amount of raindrops. Furthermore, the wind control and anti-drip plates are provided with a permeable and vortex-eliminating area, which can reduce the transverse vortex in the flow channel between the two wind control and anti-drip plates, thereby reducing the air intake resistance, increasing the effective air intake volume radially along the cooling tower, further suppressing raindrops, and optimizing the uniformity and stability of the air intake flow field. It also reduces the wind blow loss of cooling water and the pollution of the surrounding land. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the layout of a raindrop suppression device for a natural ventilation wet cooling tower that couples raindrop suppression with intake airflow field optimization.

[0016] Figure 2This is a schematic diagram of the wind control and anti-drip plate of the rain-drip suppression device.

[0017] Figure 3 This is a schematic diagram of the airflow field within the airflow channels of an integral flat plate structure and an integral arc-shaped structure with ventilation and vortex-eliminating areas.

[0018] Figure 4 This diagram illustrates the airflow field within the airflow channel of a combination structure of a flat plate and an arc-shaped plate with a permeable and vortex-eliminating area, and a combination structure of a flat plate and a corrugated plate.

[0019] Figure 5 A schematic diagram of the airflow field within the airflow channel of a wind-control and anti-drift plate combination structure with a permeable and vortex-eliminating area, specifically an air-control and anti-drift plate combination structure.

[0020] Figure 6 This is a schematic diagram of the ventilation and vortex-eliminating area.

[0021] In the diagram: 1-Cooling tower; 2-Wind control and anti-slip plate; 3-Air inlet; 4-Rain zone; 5-Ventilation and vortex elimination area; 6-Top wind control device; 7-Filling material; 8-Water collection pool wall; 9-Rain zone boundary. Detailed Implementation

[0022] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the protection scope of the present invention.

[0023] like Figures 1-5 As shown, a natural ventilation wet cooling tower that couples raindrop suppression and inlet airflow field optimization includes a cooling tower 1 and a raindrop suppression device. The cooling tower 1 is a natural ventilation wet cooling tower, comprising a tower body, an air inlet 3, and a rain zone 4. The raindrop suppression device includes a circumferential wind control device and a top wind control device 6. The circumferential wind control device consists of 52 wind control and anti-drift plates 2 vertically arranged on the side wind section outside the air inlet. When ambient wind blows across the side wind area of ​​the cooling tower 1, the raindrop suppression device, in conjunction with the circumferential wind through the side wind area, redirects the circumferential through-draft in the side wind area of ​​the cooling tower 1 into the tower, thereby suppressing the ambient wind from blowing raindrops from the side wind area of ​​the cooling tower 1 out of the air inlet, reducing wind loss in the rain zone, and increasing the effective radial airflow of the cooling tower 1.

[0024] The tower body of the natural ventilation humidification tower 1 has a hyperbolic structure; the rain zone 1 is located in the area directly below the packing 7 and inside the air inlet 3 in the tower body, with a radius of Ry=41m; the water collection pool is located directly below the rain zone, with a radius of Rs=42m.

[0025] The height of the circumferential air control device is H=8.4m, and the height of the cooling tower air inlet is Hj=7.5m; the height of the circumferential air control device is greater than the height of the cooling tower air inlet; the air control anti-slip plate 2 is arranged in two layers along the height direction, and the height of each layer of the air control anti-slip plate 2 is 4.2m.

[0026] The wind control and anti-sway plate 2 has a structure that is one or more of a flat plate, corrugated plate, or curved plate structure, and is arranged in layers in a vertical, radial, or arbitrary direction. For example... Figures 3-5 For example, the wind control and anti-slip plate 2 can be an integral flat plate structure, an integral arc-shaped structure, a combination of flat plate and arc-shaped plate, a combination of flat plate and corrugated plate, and a combination of arc-shaped plate and corrugated plate, etc.

[0027] In this embodiment, the wind control and anti-drift plate 2 is a combination structure of flat plate and arc plate. The design ambient wind speed is 5m / s, the rain droplet falling time is 2s, the inner and outer spacing of the wind control and anti-drift plate 2 along the tower radial direction is Wd=2.4m, and the spacing between the two wind control and anti-drift plates 2 is in the range of 1.0m≤Kd≤9.8m, and Kd=5.0m is taken.

[0028] like Figure 1 , 6 As shown, the ventilation and vortex-eliminating area 5 is arranged on the wind control and anti-sway plate 2, and the opening ratio of the ventilation and vortex-eliminating area η=100%.

[0029] Furthermore, it also includes a top air control device 6; the outer end of the top air control device 6 overlaps with the top of the circumferential air control device, and the inner end is connected to the outer wall of the tower body, forming a ring-shaped flat plate structure arranged around the tower; and the height of the inner end of the top air control device 6 is Hn=9.2m.

[0030] It also includes a raindrop suppression device arranged in the non-crosswind section around the air inlet 3 of the cooling tower 1, which consists of a circumferential wind control device and a top wind control device 6; the overall arrangement is the same as the raindrop suppression device in the crosswind section, so as to adapt to changes in the ambient wind direction.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to encompass all variations falling within the meaning and scope of equivalents of the claims within this utility model, and no reference numerals in the claims should be considered as limiting the scope of the claims.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A natural draft wet cooling tower coupled with rain zone drift suppression and inlet flow field optimization, comprising a cooling tower and a rain zone drift suppression device, characterized in that: The cooling tower is a natural ventilation wet cooling tower, comprising a tower body, an air inlet, a filler, a rain area and a water collecting pool; the rain area droplet suppression device comprises a circumferential wind control device composed of a wind control anti-drifting plate and a top wind control device, which are arranged on the tower circumferential side wind section outside the air inlet; when the ambient wind blows through the cooling tower side wind area, the circumferential crosswind of the cooling tower side wind area is turned into the tower by the synergistic effect of the rain area droplet suppression device, so as to suppress the ambient wind from blowing the rain area droplets of the cooling tower side wind area out of the air inlet, reduce the rain area wind blow loss, and increase the effective radial air inlet amount of the cooling tower.

2. A natural draft wet cooling tower coupled with rain zone drift inhibition and inlet flow field optimization according to claim 1, characterized in that: The tower body of the natural ventilation wet cooling tower is a hyperbolic structure; the air inlet is between the lowermost part of the hyperbolic structure of the tower body and the water collecting pool; the filler is located inside the tower body at a certain distance from the upper end of the air inlet; the rain area is located directly below the filler and directly above the water collecting pool, and is the area inside the air inlet, which is an idle area or has a cross-shaped wind blocking wall arranged therein, and the radius of the rain area is Ry; the water collecting pool is located directly below the rain area, and the radius of the water collecting pool is Rs.

3. A natural draft wet cooling tower coupled with rain zone drift inhibition and inlet flow field optimization according to claim 2, characterized in that: The height of the circumferential air control device is H, and the height of the air inlet of the cooling tower is Hj; the height of the circumferential air control device .

4. A natural draft wet cooling tower coupled with rain zone drift inhibition and inlet flow field optimization according to claim 3, characterized in that: The wind control anti-drifting plate has an inner and outer radial distance of Wd, and 0.5m ≤ Wd ≤ 6.0m.

5. A natural draft wet cooling tower coupled with rain zone drift inhibition and inlet flow field optimization according to claim 4, characterized in that: The drift distance of the rain zone droplet under the action of the design ambient wind speed vs is Lpd, which is the product of the falling time t of the rain zone droplet and the design ambient wind speed vs; the adjacent spacing of the wind control anti-drift plate is Kd, when the design ambient wind speed vs is greater than or equal to 5 m / s, .

6. A natural draft wet cooling tower coupled with rain zone drift inhibition and inlet flow field optimization according to claim 5, characterized in that: The structure of the wind control anti-drifting plate is a flat plate structure, which can turn the circumferential crosswind of the cooling tower side wind area into the tower.

7. A natural draft wet cooling tower coupled with rain zone drift inhibition and inlet flow field optimization according to claim 6, characterized in that: Further, the structure of the wind control anti-drifting plate can also be one or more of a flat plate, a corrugated plate or an arc-shaped plate structure, and is arranged and combined in layers in the vertical, radial or any direction.

8. A natural draft wet cooling tower coupled with rain zone drift inhibition and inlet flow field optimization according to claim 7, characterized in that: Further, the wind control anti-drifting plate can also be provided with a wind-permeable vortex reduction area, which has wind permeability and effectively reduces the transverse vortex in the flow channel, reduces the air inlet resistance, improves the radial air inlet amount of the cooling tower, and optimizes the uniformity and stability of the air inlet flow field; the wind-permeable vortex reduction area is arranged on the wind control anti-drifting plate, and the opening rate thereof is 0% ≤ η ≤ 100%.

9. A natural draft wet cooling tower coupled with rain zone drift inhibition and inlet flow field optimization according to claim 8, characterized in that: The top air control device is in the shape of an annular flat plate arranged around the tower, with one end outside connected to the top of the circumferential air control device and the other end inside connected to the outer wall of the tower body. .

10. A natural draft wet cooling tower coupled with rain zone drift inhibition and inlet flow field optimization according to claim 9, characterized in that: Further, the rain area droplet suppression device can also be arranged in the non-side wind section of the air inlet of the cooling tower to adapt to the change of the ambient wind direction.

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