Cooling tower noise reduction device

Abstract

The utility model relates to a noise reduction device for a cooling tower, which is mounted on the bottom side wall of a water collecting tank at the bottom of an inner cavity of the cooling tower and comprises a base, a flow guide rod, a flow guide funnel and a water diversion plate, the base is mounted on the bottom side wall of the water collecting tank, a lower outlet of the diversion funnel sleeves the upper end of the diversion rod and is located above the water collecting tank, and a diversion port is formed between the lower outlet of the diversion funnel and the outer side wall of the diversion rod; the water diversion plate sleeves the outer side wall of the middle part of the flow guide rod and is positioned on the water surface of the water collecting tank; the outer diameter of the water diversion plate is gradually increased from the upper end surface to the lower end surface. According to the cooling tower, noise generated when water drops cooled by the filler in the cooling tower drop into the water collecting tank below can be greatly reduced, and great negative effects of the noise on daily life of surrounding residents, production of a power plant and even the natural environment around the power plant are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling tower noise reduction, in particular to a cooling tower noise reduction device. Background Art

[0002] The cooling tower of a power plant is an important cold-end equipment for the generator set. For example, the natural ventilation countercurrent wet cooling tower commonly seen in domestic power plants, the hot water sprayed by the spray device in the tower exchanges heat with the air during the top-down movement, thereby reducing the temperature of the water. The water droplets sprayed by the water spray device will first contact the cooling tower filler during the falling process, and continue to flow downward in the form of a liquid film on the surface of the filler. The water flowing out from the bottom of the filler will form droplets again, and its gravitational potential energy will gradually be converted into kinetic energy. The droplets contain a certain amount of kinetic energy when they contact the water surface. Therefore, a large number of water droplets in the cooling tower of the power plant will hit the water surface and produce a large noise. At present, there are still some power plants in my country that are close to cities or old power plants that are close to urban areas due to the expansion of urban scale. The noise generated by the cooling tower may have a great negative impact on the daily life of surrounding residents, the production of power plants, and even the natural environment around power plants.

[0003] Some existing noise reduction devices for cooling towers in power plants have some drawbacks. For example, in some noise reduction methods, a layer of sound-absorbing materials such as sponge is laid on the water surface of the cooling tower collection pool. This noise reduction method will hinder the natural convection heat exchange between the water surface of the collection pool and the air, weaken the heat exchange in this area, and affect the overall working effect of the cooling tower. A cooling tower noise reduction device is hereby proposed to solve the above problems. Utility Model Content

[0004] The utility model provides a cooling tower noise reduction device, which reduces the kinetic energy of water drops in the vertical direction by setting a water droplet diversion route, greatly reduces the noise generated by the collision of water drops with the water surface when the water drops fall into the water collection pool, thereby reducing the great negative impact of noise on the daily life of surrounding residents, the production of power plants and even the natural environment around the power plants.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A cooling tower noise reduction device is installed on the bottom side wall of a water collecting tank at the bottom of the inner cavity of the cooling tower, and comprises a base, a guide rod, a guide funnel and a water distribution plate;

[0007] The base is mounted on the bottom side wall of the water collecting tank, the outlet at the lower end of the diversion funnel is sleeved on the upper end of the diversion rod and is located above the water collecting tank, and a diversion port is provided between the outlet at the lower end of the diversion funnel and the outer side wall of the diversion rod;

[0008] The water diversion plate is sleeved on the outer wall of the middle part of the guide rod and is located on the water surface of the water collection pool. The outer diameter of the water diversion plate gradually increases from the upper end surface to the lower end surface of the water diversion plate.

[0009] Preferably, the outer side wall of the water dividing plate transitions from the upper end surface to the lower end surface to form an arc-shaped surface.

[0010] Preferably, the slope of the lower outer wall of the water diversion plate gradually increases from top to bottom, and the outer wall of the lower end portion of the water diversion plate is tangent to the horizontal plane where the lower end surface is located.

[0011] Preferably, a slide groove is vertically arranged on the outer wall of the guide rod, and the slide groove passes through the upper end surface of the guide rod. A sliding block used in conjunction with the slide groove is correspondingly arranged on the inner wall of the water dividing plate, and the density of the water dividing plate is less than the density of water.

[0012] Preferably, the sliding block is provided with a plurality of spherical grooves along the vertical direction, a ball is provided in each of the spherical grooves, and the ball portion is located outside the spherical groove.

[0013] Preferably, a floating plate is provided on the lower end surface of the water dividing plate, and the density of the floating plate is lower than that of water.

[0014] Preferably, a plurality of cones are connected to the upper end surface of the guide rod, and the upper part of the tip of the cone is located on the upper side of the guide funnel.

[0015] Preferably, the outer wall of the guide funnel and the outer wall of the cone are both covered with a noise reduction layer.

[0016] Preferably, the upper end portion of the guide rod is configured as a spherical structure.

[0017] Preferably, the base includes a bottom plate, a mounting tube and a spring. The bottom plate can be detachably mounted on the bottom side wall of the water collecting pool. A placement groove is provided at the upper end of the mounting tube. The spring is installed in the placement groove. The lower end of the guide rod is placed in the placement groove, and the lower end surface of the guide rod abuts against the spring.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] By flowing from top to bottom along the inner wall of the guide funnel, the outer wall of the guide rod, and the outer wall of the water diversion plate, and finally flowing into the water collection pool through the outer wall of the water diversion plate, the vertical kinetic energy of the water droplets is greatly reduced compared to directly falling into the water collection pool, thereby greatly reducing the noise generated by the collision of water droplets with the water surface when falling into the water collection pool, thereby reducing the great negative impact of noise on the daily life of surrounding residents, the production of power plants and even the natural environment around the power plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is an overall schematic diagram of the device in the embodiment of the present invention;

[0022] Figure 2 It is a front cross-sectional view of a device according to an embodiment of the present invention;

[0023] Figure 3 A top view of a device according to an embodiment of the present invention;

[0024] Figure 4 A cross-sectional view of a water splitter plate and a floating plate according to an embodiment of the present invention;

[0025] Figure 5 It is a top view of the water distribution plate in an embodiment of the present invention.

[0026] Description of reference numerals:

[0027] 1. Base; 11. Bottom plate; 12. Mounting tube; 121. Placement slot; 13. Spring; 2. Guide rod; 21. Slide; 3. Guide funnel; 4. Water distribution plate; 41. Sliding block; 42. Ball bearing; 43. Floating plate; 5. Guide port; 6. Cone; 7. Water collection tank. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] A water collecting pool is formed at the bottom of the inner cavity of the cooling tower in the prior art. The water droplets sprayed by the water spraying device will first contact the cooling tower filler during the falling process, and continue to flow downward in the form of a liquid film on the surface of the filler. The water flowing out from the bottom of the filler will form droplets again, and its gravitational potential energy will gradually be converted into kinetic energy. The droplets contain a certain amount of kinetic energy when they contact the water surface. Therefore, a large number of water droplets in the cooling tower of the power plant will hit the water surface and generate a lot of noise. The noise generated by the cooling tower may have a great negative impact on the daily life of surrounding residents, the production of the power plant and even the natural environment around the power plant.

[0032] Hereby Figure 1-5As shown, in an embodiment of the utility model, a cooling tower noise reduction device is provided, which is installed on the bottom side wall of a water collecting tank 7 at the bottom of the inner cavity of the cooling tower, and specifically includes a base 1, a guide rod 2, a guide funnel 3 and a water dividing plate 4, wherein the base 1 is installed on the bottom side wall of the water collecting tank 7, the lower end outlet of the guide funnel 3 is sleeved on the upper end of the guide rod 2, and a guide port 5 is provided between the lower end outlet of the guide funnel 3 and the outer side wall of the guide rod 2, and the water dividing plate 4 is sleeved on the outer side wall of the middle part of the guide rod 2, and the outer diameter of the water dividing plate 4 is from the water dividing plate 4 to the water dividing plate 4. The water plate 4 gradually increases from the upper end surface to the lower end surface, so that the outer wall of the water dividing plate 4 can be an inclined surface or an arc surface. After the entire device is installed, the water dividing plate 4 is located on the water surface of the water collecting pool 7, and the guide funnel 3 is located above the water dividing plate 4, that is, located above the water surface of the water collecting pool 7. When in use, water drops flowing out from the bottom of the filler will fall onto the inner wall of the guide funnel 3, and then flow along the inner wall of the guide funnel 3 to the guide port 5 below, and then flow through the guide port 5 to the outer wall of the guide rod 2 below the guide funnel 3, and then through the guide port 5. It flows along the outer wall of the guide rod 2 to the water dividing plate 4. Because the outer wall of the water dividing plate 4 is an arc or an inclined surface, the water droplets can flow from top to bottom along the outer wall of the water plate and finally flow into the water collecting pool 7. When the water droplets flow into the noise reduction device, they will eventually flow into the water collecting pool 7 along a predetermined route, that is, they flow from top to bottom along the inner wall of the guide funnel 3, the outer wall of the guide rod 2, and the outer wall of the water dividing plate 4, and finally flow into the water collecting pool 7 through the outer wall of the water dividing plate 4. Compared with the water droplets directly falling into the water collecting pool 7, their vertical kinetic energy is greatly reduced, thereby greatly reducing the noise generated by the collision of the water droplets with the water surface when the water droplets fall into the water collecting pool 7, thereby reducing the noise. The negative impact on the daily life of the surrounding residents, the production of the power plant and even the natural environment around the power plant is greatly reduced. Moreover, the device is laid on the bottom side wall of the water collecting pool, and only the upper part of the device is located above the water surface, occupying a very small space, will not affect the natural convection heat exchange process between the water surface of the water collecting pool and the air, and weaken the heat exchange effect of this part of the area.

[0033] Furthermore, the outer wall of the water-dividing plate 4 transitions from the upper end face to the lower end face to form an arc-shaped surface, wherein the path of the water droplets flowing on the arc-shaped surface is longer than that of the inclined surface. By extending the flow path of the water droplets and consuming friction energy, the kinetic energy in the vertical direction can be further reduced. Moreover, the slope of the outer wall of the water-dividing plate 4 gradually increases from top to bottom, and the outer wall of the water-dividing plate 4 is tangent to the lower end face, so that the water droplets flow to the lower part of the water-dividing plate 4 and will flow into the water surface of the water collecting pool 7 at a smaller water entry angle, so that the kinetic energy in the vertical direction will be very small, so that when falling on the water surface of the water collecting pool 7, the noise generated by the collision between the water droplets and the water surface of the water collecting pool 7 will be very small, thereby achieving the purpose of greatly reducing the noise.

[0034] Furthermore, a slide groove 21 is vertically provided on the outer wall of the guide rod 2, and the slide groove 21 passes through the upper end of the guide rod 2. A slider 41 used in conjunction with the slide groove 21 is correspondingly provided on the inner wall of the water diversion plate 4, so that the water diversion plate 4 can slide in the vertical direction along the slide groove 21, and the density of the water diversion plate 4 is less than the density of water, and the lower end surface of the water diversion plate 4 will always float on the water surface. When the depth of the water collection pool 7 changes, the water diversion plate 4 will also automatically slide in the vertical direction to adapt to the change of the water surface, so that the water diversion plate 4 will always float on the water surface, and finally the water droplets will flow into the water surface of the water collection pool 7 at a smaller water entry angle along the outer wall of the water diversion plate 4. Preferably, there are two slide grooves 21, and the two slide grooves 21 are symmetrically arranged according to the central axis of the guide rod 2, and there are also two corresponding sliders 41. When in use, the two sliders 41 are correspondingly slidably arranged in the two slide grooves 21.

[0035] Furthermore, the slider 41 is provided with a plurality of spherical grooves along the vertical direction, and a ball 42 is provided in each spherical groove, and part of the ball 42 is located outside the spherical groove. Thus, when the slider 41 slides relative to the slide groove 21, the sliding friction is changed into rolling friction between the ball 42 and the sliding side wall, thereby greatly increasing the smoothness of the movement of the water diversion plate 4 in the vertical direction.

[0036] Preferably, a floating plate 43 is provided on the lower end surface of the water diversion plate 4, and the density of the floating plate 43 is less than that of water, thereby further ensuring that the arc-shaped outer wall of the entire water diversion plate 4 is located on the water surface of the water collection pool 7, and the draft is borne by the floating plate 43, so that the water droplets can flow out from the lowest point of the arc-shaped outer wall of the water diversion plate 4. At this time, the vertical kinetic energy of the water droplets is minimized. Of course, the thickness of the floating plate 43 is very small, and it can be designed that during use, the draft depth of the water diversion plate 4 plus the floating plate 43 in the water collection pool 7 is equal to the thickness of the floating plate 43. At this time, the lowest point of the outer wall of the water diversion plate 4 is the water surface of the water collection pool 7.

[0037] Furthermore, the upper end surface of the guide rod 2 is connected with a plurality of cones 6. In the present embodiment, there are six cones 6, and any cone 6 is connected to the upper end surface of the guide rod 2 through a hard connecting rod, and the upper part of the tip of the cone 6 is located on the upper side of the guide funnel 3, so that the large water droplets falling on the cone 6 will be divided into small water droplets, and then fall along the cone 6 to the inner wall of the guide funnel 3, so as to avoid the water droplets being too large, thus having large kinetic energy and generating large noise when colliding with the water surface. Moreover, the upper end of the guide rod 2 is set as a spherical structure, so that the water droplets falling on the upper end of the guide rod 2 will flow smoothly along the spherical surface to the side wall of the guide rod 2, making the water droplets flow more smoothly. Furthermore, the inner wall of the guide funnel 3 and the outer wall of the cone 6 are both coated with a noise reduction layer, and the noise reduction layer can be a foam layer or the like.

[0038] The base 1 includes a bottom plate 11, a mounting tube 12 and a spring 13. The bottom plate 11 is detachably mounted on the bottom side wall of the water collecting pool 7 by bolts. A placement groove 121 is provided at the upper end of the mounting tube 12. The spring 13 is installed in the placement groove 121. The lower end of the guide rod 2 is placed in the placement groove 121, and the lower end surface of the guide rod 2 is in contact with the spring 13. Therefore, when a large amount of water droplets fall on the side wall of the diversion funnel 3, the spring 13 in the placement groove 121 is compressed, which can play a buffering role.

[0039] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A cooling tower noise reduction device, installed on the bottom side wall of the water collecting tank at the bottom of the inner cavity of the cooling tower, characterized in that: It includes a base, a guide rod, a guide funnel and a water distribution plate; The base is installed on the bottom side wall of the water collecting pool, the outlet at the lower end of the diversion funnel is sleeved on the upper end of the diversion rod and is located above the water collecting pool, and a diversion port is provided between the outlet at the lower end of the diversion funnel and the outer side wall of the diversion rod; The water diversion plate is sleeved on the outer wall of the middle part of the guide rod and is located on the water surface of the water collection pool. The outer diameter of the water diversion plate gradually increases from the upper end surface to the lower end surface of the water diversion plate.

2. The cooling tower noise reduction device according to claim 1, characterized in that: The outer side wall of the water dividing plate transitions from the upper end surface to the lower end surface to form an arc surface.

3. The cooling tower noise reduction device according to claim 2, characterized in that: The slope of the lower outer side wall of the water dividing plate gradually increases from top to bottom, and the outer side wall of the lower end portion of the water dividing plate is tangent to the horizontal plane where the lower end surface is located.

4. The cooling tower noise reduction device according to claim 1, characterized in that: The outer wall of the guide rod is vertically provided with a slide groove, which passes through the upper end surface of the guide rod. The inner wall of the water diversion plate is correspondingly provided with a sliding block used in conjunction with the slide groove. The density of the water diversion plate is less than the density of water.

5. The cooling tower noise reduction device according to claim 4, characterized in that: The slider is provided with a plurality of spherical grooves along the vertical direction, each of the spherical grooves is provided with a ball, and the ball portion is located outside the spherical groove.

6. The cooling tower noise reduction device according to claim 1, characterized in that: A floating plate is arranged on the lower end surface of the water dividing plate, and the density of the floating plate is lower than that of water.

7. The cooling tower noise reduction device according to claim 1, characterized in that: The upper end surface of the guide rod is connected with a plurality of cones, and the upper part of the tip of the cone is located on the upper side of the guide funnel.

8. The cooling tower noise reduction device according to claim 7, characterized in that: The outer wall of the guide funnel and the outer wall of the cone are both covered with a noise reduction layer.

9. The cooling tower noise reduction device according to claim 1, characterized in that: The upper end portion of the guide rod is configured as a spherical structure.

10. The cooling tower noise reduction device according to claim 1, characterized in that: The base includes a bottom plate, a mounting tube and a spring. The bottom plate can be detachably mounted on the bottom side wall of the water collection pool. A placement groove is provided at the upper end of the mounting tube. The spring is installed in the placement groove. The lower end of the guide rod is placed in the placement groove, and the lower end surface of the guide rod abuts against the spring.

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