A noise reduction structure of a mechanical draft cooling tower group, a cooling tower group and a method

Abstract

The present application belongs to the technical field of mechanical ventilation cooling tower, and proposes a noise reduction structure, a cooling tower group and a method of the mechanical ventilation cooling tower group, wherein a flow guide plate is arranged between the noise reduction wall and the cooling tower group, and an arc-shaped wind guide is arranged at the edge of the cooling tower group; the height of the noise reduction wall is less than the height of the air inlet of the cooling tower group, and a plurality of air inlets are formed in the noise reduction wall, so that the wind passes through the upper part of the noise reduction wall and the air inlets and then reaches the tower group through the flow guide plate, thereby solving the problem that the noise reduction wall is too close to the cooling tower and the height of the noise reduction wall is too high, which greatly reduces the air inlet of the cooling tower; by optimizing the structure of the noise reduction wall, improving the air flow of the air inlet of the cooling tower and controlling the transverse vortex of the four cooling towers in the corners of the tower group, the noise reduction requirement is met, and the cooling effect of the cooling tower is not affected.

Description

Technical Field

[0001] This invention belongs to the field of mechanical ventilation cooling tower technology, and particularly relates to a noise reduction structure, cooling tower group and method for a mechanical ventilation cooling tower group. Background Technology

[0002] Currently, mechanical ventilation cooling towers are widely used in industries such as power, chemical, steel and petrochemical. They generally appear in the form of tower groups, with each tower group consisting of 8 or 10 cooling towers.

[0003] Mechanical draft cooling towers are further divided into those with rain-affected areas and those with elevated water collection systems in areas without rain. For elevated water collection mechanical draft cooling towers, there are also transverse vortices in the elevated water collection component area, which affect the cooling efficiency of the tower.

[0004] When cooling towers are operating, noise from the falling water and the fans is generated. Therefore, a noise reduction wall is installed on the side of the cooling tower group near the factory boundary or office area. Generally, the height of the noise reduction wall is greater than the height of the air inlet of the cooling tower, and there are distance requirements between the wall and the cooling tower group, which is generally more than 30-50 meters.

[0005] The inventors discovered that due to space limitations, the distance between the noise reduction wall and the cooling tower did not meet the specified distance requirements. This resulted in the noise reduction wall being too close to the cooling tower and too high, which affected the air intake of the cooling tower. This greatly reduced the air intake, causing the cooling tower outlet water temperature to rise and the cooling efficiency to decrease. In some seasons, this has already affected the normal operation of the main unit. Summary of the Invention

[0006] To address the aforementioned problems, this invention proposes a noise reduction structure, a cooling tower group, and a method for a mechanical ventilation cooling tower group. To resolve the prominent issues of reduced airflow and decreased cooling efficiency after installing noise reduction walls around the mechanical ventilation cooling tower group, this invention optimizes the noise reduction wall structure, improves airflow at the cooling tower inlets, and controls the vortex formation in the four cooling towers at the corners of the group. This satisfies the noise reduction requirements without affecting the cooling efficiency of the cooling towers.

[0007] To achieve the above objectives, in a first aspect, the present invention provides a noise reduction structure for a group of mechanically ventilated cooling towers, employing the following technical solution:

[0008] A noise reduction structure for a mechanical ventilation cooling tower group includes a noise reduction wall disposed on at least one side of the cooling tower group, a guide plate disposed between the noise reduction wall and the cooling tower group, and an arc-shaped air guide edge disposed at the edge of the cooling tower group.

[0009] The height of the noise reduction wall is less than the height of the air inlet of the cooling tower group. Multiple noise reduction wall vents are provided on the noise reduction wall so that the air passes through the upper part of the noise reduction wall and the vents, and then through the guide plate to reach the tower group.

[0010] Furthermore, multiple ventilation openings are distributed on the noise reduction wall.

[0011] Furthermore, the length direction of the guide plate is perpendicular to the cross-sectional direction of the air inlet of the cooling tower.

[0012] Furthermore, the height of the guide plate is the same as the height of the air inlet of the cooling tower, and the guide plate is made of sound-absorbing material.

[0013] Furthermore, the end ventilation holes are located at the corresponding end positions of the lower part of the cooling tower water collection assembly;

[0014] Furthermore, the cooling tower group is a high-level water collection cooling tower group, with multiple end ventilation holes opened at both ends of the high-level water collection cooling tower group.

[0015] Furthermore, the end ventilation holes adopt a louver structure; the end ventilation holes are evenly distributed along the length of both ends of the tower group.

[0016] Furthermore, at each of the two end faces of the cooling tower group, an arc-shaped air guide is provided, and the height of the arc-shaped air guide is consistent with the height of the air inlet of the cooling tower.

[0017] Furthermore, the arc-shaped air guide edge is divided into two sections at the locations where end ventilation holes are set at both ends of the tower group.

[0018] To achieve the above objectives, in a second aspect, the present invention also provides a group of mechanically ventilated cooling towers, employing the following technical solution:

[0019] A mechanical ventilation cooling tower group adopts the noise reduction structure of the mechanical ventilation cooling tower group as described in the first aspect.

[0020] To achieve the above objectives, in a third aspect, the present invention also provides a noise reduction method for a group of mechanically ventilated cooling towers, employing the following technical solution:

[0021] A noise reduction method for a group of mechanically ventilated cooling towers employs a noise reduction structure for the group of mechanically ventilated cooling towers as described in the first aspect, including a noise reduction wall whose height is less than the height of the air inlet of the cooling tower group, and multiple noise reduction wall vents provided on the noise reduction wall, so that the air passes through the upper part of the noise reduction wall and the vents, and then passes through the guide plate to reach the tower group.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. In this invention, a guide plate is set between the noise reduction wall and the cooling tower group, and an arc-shaped air guide edge is set at the edge of the cooling tower group; the height of the noise reduction wall is less than the height of the air inlet of the cooling tower group, and multiple noise reduction wall ventilation openings are opened on the noise reduction wall, so that the air passes through the upper part of the noise reduction wall and the ventilation openings and then through the guide plate to reach the tower group, which solves the problem that the noise reduction wall is too close to the cooling tower and the noise reduction wall is too high, resulting in a reduction in the air intake of the cooling tower; by optimizing the structure of the noise reduction wall, improving the airflow at the air inlet of the cooling tower, and controlling the vortex of the four cooling towers at the corner of the tower group, the noise reduction requirements are met without affecting the cooling efficiency of the cooling tower;

[0024] 2. This invention addresses the problem that noise reduction walls significantly reduce cooling efficiency in high-level mechanical ventilation cooling towers due to their inadequate air intake. It reduces the height of the noise reduction walls and employs a ventilated design, increasing the air intake and compensating for insufficient ventilation in the original technology. Furthermore, it controls cooling tower vortices by using inlet guides and end ventilation holes at both ends of the tower group. The invention also improves cooling efficiency by placing air guide flanges at the four corners of both ends of the tower group, thus mitigating the reduced efficiency of the original technology and enhancing the overall cooling effect. Attached Figure Description

[0025] The accompanying drawings, which form part of this embodiment, are used to provide a further understanding of this embodiment. The illustrative embodiments and their descriptions are used to explain this embodiment and do not constitute an improper limitation of this embodiment.

[0026] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0027] Figure 2 This is a top view of Embodiment 1 of the present invention;

[0028] Figure 3 This is a schematic diagram of the end ventilation hole in Embodiment 1 of the present invention;

[0029] Figure 4 This is a top view of the noise reduction wall in Embodiment 1 of the present invention;

[0030] Figure 5 This is a side view of the noise reduction wall according to Embodiment 1 of the present invention;

[0031] Figure 6 This is a schematic diagram of the guide plate in Embodiment 1 of the present invention;

[0032] Figure 7 This is a front view of the wind guide flange of Embodiment 1 of the present invention;

[0033] Figure 8 This is a top view of the wind guide flange of Embodiment 1 of the present invention;

[0034] Among them, 1. Noise reduction wall; 2. Noise reduction wall ventilation opening; 3. Guide plate; 4. Cooling tower air inlet; 5. Cooling tower nozzle; 6. Cooling tower body; 7. Cooling tower fan; 8. Arc-shaped air guide edge; 9. Arc-shaped air guide edge support; 10. Tower group; 11. End ventilation hole; 12. Tower group end. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0037] Example 1:

[0038] Due to space constraints, the distance between the noise reduction wall and the cooling tower does not meet the required distance. This results in the noise reduction wall being too close to the cooling tower and too tall, significantly reducing the airflow into the cooling tower. Consequently, the cooling tower's outlet water temperature increases, cooling efficiency decreases, and in some seasons, this has already affected the normal operation of the main unit. To address these issues, such as... Figure 1 As shown, this embodiment provides a noise reduction structure for a mechanical ventilation cooling tower group, including a noise reduction wall 1 disposed on at least one side of the cooling tower group, a guide plate 3 disposed between the noise reduction wall 1 and the cooling tower group, and an arc-shaped air guide edge 8 disposed at the edge of the cooling tower group.

[0039] The height of the noise reduction wall 1 is less than the height of the air inlet 4 of the cooling tower group. Multiple noise reduction wall vents 2 are provided on the noise reduction wall 1, so that the air passes through the upper part of the noise reduction wall 1 and the vents 2 and then passes through the guide plate 3 to reach the tower group.

[0040] Specifically, a guide vane 3 is installed between the noise reduction wall 1 and the cooling tower group, and an arc-shaped air guide edge 8 is installed at the edge of the cooling tower group. The height of the noise reduction wall 1 is less than the height of the air inlet 4 of the cooling tower group. Multiple noise reduction wall vents 2 are opened on the noise reduction wall 1, so that the air passes through the upper part of the noise reduction wall 1 and the vents 2 and then through the guide vane 3 to reach the tower group. This solves the problem that the noise reduction wall is too close to the cooling tower and the noise reduction wall is too high, which greatly reduces the air intake of the cooling tower. By optimizing the structure of the noise reduction wall, improving the airflow at the air inlet of the cooling tower, and controlling the vortex of the four cooling towers at the corner of the tower group, the noise reduction requirements are met without affecting the cooling efficiency of the cooling tower.

[0041] In this embodiment, the tower group is a mechanical high-level water collection and ventilation cooling tower group, which can adopt a double-row back-to-back single-sided air intake structure or a single-row double-sided air intake structure.

[0042] In some embodiments, a method for noise reduction and efficiency improvement of a mechanical high-level water collection and ventilation cooling tower group is provided, including a noise reduction wall structure optimization, a technical solution for improving the airflow at the air inlet of the cooling tower group, a technical solution for adding ventilation holes at both ends of the tower group, and a technical solution for setting air guide flanges at the four corners at both ends of the tower group.

[0043] In some embodiments, a method for noise reduction and efficiency enhancement of a mechanical high-level water collection and ventilation cooling tower group is provided, which adopts the structural technology of changing the noise reduction wall. The height h of the noise reduction wall 1 is lower than the air inlet height k of the cooling tower group. Optionally, the difference between the two is no more than 2-3m.

[0044] The noise reduction wall 1 has ventilation openings 2, and the ratio of the area of ​​the ventilation opening 2 to the total plane area of ​​the noise reduction wall 1 is 0.4-0.5. Multiple ventilation openings 2 are evenly distributed on the noise reduction wall. The ventilation openings 2 can be louvered, or they can be round, rectangular, or square holes.

[0045] Optionally, the noise reduction wall 1 is made of a metal frame, color steel plate and sound-absorbing plate.

[0046] In some embodiments, a method for noise reduction and efficiency improvement of a mechanical ventilation cooling tower group is provided, which adopts a technical solution to improve the airflow at the air inlet of the cooling tower group and sets guide plates 3 on the two air inlet surfaces of the cooling tower group.

[0047] Optionally, the length direction of the guide plate 3 is perpendicular to the cross-sectional direction of the air inlet; the length a of the guide plate 3 is 0.8-1.2m; the spacing c of the guide plates 3 is 0.5-2m; the height of the guide plate 3 is the same as the height of the air inlet; the guide plate is made of sound-absorbing material and is fixedly installed on the ground at the air inlet; the distance b between the guide plate and the air inlet is not less than 0.3-0.5m.

[0048] In some embodiments, a method for noise reduction and efficiency improvement of a mechanical high-level water collection and ventilation cooling tower group is provided, employing a technical solution of adding ventilation holes 11 at both ends of the cooling tower group. Five to eight ventilation holes are opened at both ends of the cooling tower. The end ventilation holes are located 200-1000mm below the water collection device of the high-level water collection cooling tower. The diameter of the ventilation holes is approximately 300-500mm. The ventilation holes are evenly distributed at both ends of the tower group. The ventilation holes adopt a louvered structure.

[0049] In some embodiments, a method for noise reduction and efficiency improvement of mechanical ventilation cooling tower groups is provided, which adopts a technical solution of setting air guide flanges at the four corners of both ends of the tower group. An arc-shaped air guide flange 8 is set at each angle on both end faces of the cooling tower group, and the height of the arc-shaped air guide flange 8 is consistent with the height of the air inlet of the cooling tower.

[0050] Optionally, one end of the arc-shaped air guide flange 8 is connected to the outer edge of the four angle air inlets of the cooling tower group, and the other end extends to both ends of the cooling tower group and is connected to the end cooling tower body, and fixed to the end cooling tower body. The vertical distance n between the arc-shaped air guide flange extending to the end of the cooling tower body and the end is not less than 0.5-1m, and the extension length m is not less than 0.5-1m. The arc-shaped air guide flange 8 is made of steel plate. The arc-shaped air guide flange 8 is divided into two sections, which are disconnected at the positions where end ventilation holes are set at both ends of the tower group.

[0051] In one embodiment, the height of the noise reduction wall 1 differs from the height of the cooling tower inlet by 3m. The air permeability of the noise reduction wall 1 is 50%. A guide plate 3 is installed at the air inlet of the cooling tower group, with the height of the guide plate 3 matching the air inlet height and a length of 1m. The spacing between the guide plates is 1.5m. Five end-face ventilation holes with a diameter of 400mm are evenly distributed on each end face of the tower group. At the four corners of the cooling tower group, an arc-shaped air guide flange 8 is installed at the outer edge of the air inlet of each of the four cooling towers. One end of the arc-shaped air guide flange 8 is connected to the outer edge of the cooling tower, and the other end extends to the end of the cooling tower body at a distance of 0.5m from the tower body and is connected to the tower body.

[0052] Example 2:

[0053] This embodiment provides a mechanical ventilation cooling tower group, which adopts the noise reduction structure of the mechanical ventilation cooling tower group as described in Embodiment 1.

[0054] Example 3:

[0055] This embodiment provides a noise reduction method for a group of mechanically ventilated cooling towers. It adopts the noise reduction structure of the group of mechanically ventilated cooling towers as described in Embodiment 1. The height of the noise reduction wall 1 is less than the height of the air inlet of the cooling tower group. Multiple noise reduction wall vents 2 are provided on the noise reduction wall 1, so that the air passes through the upper part of the noise reduction wall and the vents and then passes through the guide plate to reach the tower group.

[0056] The above description is merely a preferred embodiment of this practice and is not intended to limit the scope of this practice. Various modifications and variations can be made to this practice by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this practice should be included within the protection scope of this practice.

Claims

1. A noise reduction structure for a group of mechanical ventilation cooling towers, characterized in that, It includes a noise reduction wall installed on at least one side of the cooling tower group, a guide plate installed between the noise reduction wall and the cooling tower group, and an arc-shaped air guide edge installed at the edge of the cooling tower group; The height of the noise reduction wall is less than the height of the air inlet of the cooling tower group. Multiple noise reduction wall vents are opened on the noise reduction wall so that the air passes through the upper part of the noise reduction wall and the vents and then through the guide plate to reach the tower group. The cooling tower group is a high-level water-collecting cooling tower group, with multiple end ventilation holes at both ends. These end ventilation holes are located at the lower end of the water-collecting components of the cooling towers. Specifically, 5-8 end ventilation holes are provided at each end of the cooling tower. The end ventilation holes are located 200-1000mm below the water-collecting device of the high-level water-collecting cooling tower. The diameter of the end ventilation holes is 300-500mm. The end ventilation holes adopt a louver structure and are evenly distributed along the length of both ends of the tower group. The corners of both ends of the cooling tower group are provided with arc-shaped air guides, the height of which is the same as the height of the air inlet of the cooling tower; one end of the arc-shaped air guide is connected to the outer edge of the air inlet at the four corners of the cooling tower group, and the other end extends to both ends of the cooling tower group and is connected to the cooling tower body at the end; the arc-shaped air guide is divided into two sections at the positions where the end ventilation holes are set at both ends of the tower group.

2. The noise reduction structure for a mechanical ventilation cooling tower group as described in claim 1, characterized in that, Multiple ventilation openings are distributed on the noise reduction wall.

3. The noise reduction structure for a mechanical ventilation cooling tower group as described in claim 1, characterized in that, The length direction of the guide plate is perpendicular to the cross-sectional direction of the air inlet of the cooling tower.

4. The noise reduction structure for a mechanical ventilation cooling tower group as described in claim 1, characterized in that, The height of the guide plate is the same as the height of the air inlet of the cooling tower, and the guide plate is made of sound-absorbing material.

5. A group of mechanical ventilation cooling towers, characterized in that, The noise reduction structure of the mechanical ventilation cooling tower group as described in any one of claims 1-4 is adopted.

6. A method for noise reduction of a group of mechanical ventilation cooling towers, characterized in that, The noise reduction structure of the mechanical ventilation cooling tower group as described in any one of claims 1-4 is adopted, including that the height of the noise reduction wall is less than the height of the air inlet of the cooling tower group, and that the noise reduction wall has multiple noise reduction wall ventilation openings, so that the air passes through the upper part of the noise reduction wall and the ventilation openings and then through the guide plate to reach the tower group; the cooling tower group is a high-level water collection cooling tower group, and that the high-level water collection cooling tower group has multiple end ventilation holes at both ends; the end ventilation holes are opened at the corresponding end positions of the lower part of the cooling tower water collection components; the arc-shaped air guide edge is divided into two sections at the positions where the end ventilation holes are set at both ends of the tower group.

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