Equipment used for improving cooling effect of mechanical ventilation tower and capable of reducing noise and productivity

Abstract

The utility model provides equipment for improving the cooling effect of a mechanical ventilation tower and reducing the production capacity, which comprises a water bucket device, a hanging structure and a generator, the water bucket device comprises a central shaft and a plurality of water buckets, the plurality of water buckets are uniformly arranged around the central shaft, the water buckets are provided with water tanks and are in driving connection with the generator, and the generator is connected with a storage battery. The device used for improving the cooling effect of the mechanical ventilation tower and capable of reducing the noise and the capacity can intercept water flow directly falling into the mechanical ventilation tower, the water bucket device is pushed to operate through kinetic energy of the water flow so as to drive a generator to operate, the effect of reducing the noise can be achieved, the potential energy of water falling is additionally utilized and converted into the kinetic energy, and the power generation efficiency is improved. In addition, the retention time of the water in the air is prolonged, the cooling effect of the water is improved, and the effects of water cooling, noise reduction and electric energy generation can be achieved. The device belongs to an independent device and does not influence the working process of the mechanical draft cooling tower.

Description

Technical Field

[0001] The utility model relates to the technical field of power generation, and particularly relates to a device for improving the cooling effect of a mechanical draft cooling tower and reducing noise and generating energy. Background Art

[0002] The circulating cooling water system of a power station is a crucial system in the power generation process. The steam generated by the boiler (about 550 - 650 °C) becomes exhaust steam (about 40 - 90 °C) after doing work in the steam turbine, and then needs to be cooled by a cooling water (room temperature, about 25 - 35 °C) through sufficient heat exchange in the condenser, and then is supplied back to the boiler system for recycling by the condensate pump. After the cooling water cools the exhaust steam, its own temperature rises, and it also needs to be transported to the cooling tower for circulating cooling by the circulating water pump. In this way, the two steam-water systems of steam - exhaust steam and cooling water interact with each other and then return to their respective systems for circulation. Based on the power generation principle, the better the condensation effect of the exhaust steam cooled each time (i.e., the lower the temperature of the cooling water), the higher the overall thermal efficiency of the steam cycle generated by reheating in the boiler again and the more fuel is saved. Therefore, the cooling water needs to pursue a better cooling effect.

[0003] For a long time, the cooling water used for heat exchange in the condenser of a power station comes from a cooling tower (also known as a cooling water tower). The power station construction mainly has two forms: one is a natural ventilation cooling type with a hyperbolic cylindrical shape, and the other is a cuboid-shaped auxiliary ventilation cooling type.

[0004] Among them, the cuboid-shaped auxiliary ventilation cooling type includes a mechanical draft cooling tower. The mechanical draft cooling tower has a cuboid-shaped concrete structure (with an overall height of about 40 meters). Several large fans are installed on its upper part (installed at 35 - 40 meters), and there is a pool at the bottom. The circulating water pump transports the water in the pool to the steam turbine condenser for heat exchange, and then the high-temperature hot water (about 35 - 45 °C) transported back is pumped to the top of the mechanical draft cooling tower through two return water pipes, and then flows down from the central spraying port. The water falls back to the pool at the bottom of the mechanical draft cooling tower due to gravity. In this way, in the rectangular cooling channel formed at the mechanical draft cooling tower, the water falls downward from the spraying port, while the air is drawn upward by the fan, and heat exchange occurs between the air and the water, playing a role in cooling the water, and the water can be cooled to room temperature (about 25 °C - 35 °C). The cooled water is collected in the pool and then transported back to the steam turbine condenser by the circulating water pump for heat exchange again. Repeating this process ensures the circulating supply of the cooling water for the power station. Usually, according to different ambient temperatures in winter and summer, the strength of the cooling effect depends on the number, rotation speed, power, etc. of the top fans turned on.

[0005] The mechanical draft cooling tower is small in external shape (the building height of a general power plant is usually 30 - 45 meters). Due to the addition of the mechanical forced ventilation cooling effect of the fan, the floor area of the cooling tower is reduced. The original intention of its construction is to replace the traditional hyperbolic natural draft cooling tower of a coal-fired power plant (the height is usually 150 - 290 meters), so as to achieve the effects of reducing the construction cost and construction period, reducing the occupied volume, and saving land use for small power stations, especially gas turbine power stations (with an installed capacity of less than 100 MW).

[0006] However, with the increase in the number of natural gas power stations (gas turbine units) in the southeastern coastal cities of China, some obvious problems of the mechanical draft cooling tower have gradually emerged. Because the height of the mechanical draft cooling tower is relatively low, the falling distance of water cooling is only about 25 - 30 meters. In order to improve the cooling effect, especially in the hot summer weather, the common practices adopted by each power plant are as follows:

[0007] 1. Increase the power of the top fan and the number of fans turned on, and increase the forced cooling effect by improving air circulation, but this leads to increased power consumption for operation;

[0008] 2. Increase the height of the mechanical draft cooling tower, so that the falling time of water in the air increases, and then increase the cooling effect of air on water. However, this not only requires increasing the construction scale, cost, and land occupation of the mechanical draft cooling tower, but also increases the kinetic energy of the falling water, resulting in an increase in the noise generated when the water hits the pool. Summary of the Utility Model

[0009] The purpose of the present utility model is to overcome the disadvantages and deficiencies in the prior art, and provide a device for improving the cooling effect of a mechanical draft cooling tower and capable of reducing noise and generating energy.

[0010] An embodiment of the present utility model provides a device for improving the cooling effect of a mechanical draft cooling tower and capable of reducing noise and generating energy, which is applied to a mechanical draft cooling tower. The mechanical draft cooling tower includes a main body, a cooling fan, a pool, and a circulating water pump. A cooling air duct is formed on the main body, a spraying port is arranged in the cooling air duct, the pool is arranged at the bottom of the cooling air duct, the cooling fan and the spraying port are arranged in the cooling air duct in sequence from top to bottom, and the circulating water pump is respectively communicated with the pool and the spraying port. The device for improving the cooling effect of a mechanical draft cooling tower and capable of reducing noise and generating energy includes: a water bucket device, a hanging structure, and a generator. The hanging structure is connected to the main body, the water bucket device is hung between the spraying port and the pool through the hanging structure, the water bucket device is drivingly connected to the generator for driving the generator to generate electricity, and the generator is connected with a storage battery;

[0011] The water bucket device includes a central shaft and a plurality of water buckets. The plurality of water buckets are uniformly arranged around the central shaft. A water trough is provided on the water bucket, and the water trough is located behind the water bucket in the working rotation direction. The central shaft is rotationally engaged with the hanging structure and is drivingly connected to the generator.

[0012] In some alternative embodiments, the water bucket is formed by bending a stainless steel plate, and the water trough is formed at the concave surface after the water bucket is bent;

[0013] The water bucket device further includes two end plates. The end plates are provided on the central shaft and are respectively arranged at both ends of the water bucket. The two end plates correspondingly close the notches at both ends of the water trough.

[0014] In some alternative embodiments, the water bucket, the central shaft and the end plates are integrally welded.

[0015] In some alternative embodiments, the water bucket device includes three water buckets, and the three water buckets are spaced 120° from each other;

[0016] Alternatively, the water bucket device includes five water buckets, and the five water buckets are spaced 72° from each other.

[0017] In some alternative embodiments, a dividing net is provided at the opening of the water trough.

[0018] In some alternative embodiments, the dividing net includes a plurality of horizontal bars and a plurality of vertical bars. The plurality of horizontal bars are arranged side by side at the opening of the water trough, and the plurality of vertical bars are arranged side by side at the opening of the water trough. The horizontal bars and the vertical bars intersect with each other, and a plurality of diamond-shaped meshes are formed between the plurality of horizontal bars and the plurality of vertical bars.

[0019] In some alternative embodiments, the water bucket, the horizontal bars and the vertical bars are integrally welded.

[0020] In some alternative embodiments, the hanging structure includes two bearings and two suspension rods. The suspension rods are connected to the main body, the bearings are provided on the suspension rods, the central shaft is rotatably disposed in the bearings, and the water bucket is located between the two bearings.

[0021] In some alternative embodiments, the equipment for improving the cooling effect of the mechanical draft cooling tower and reducing noise during production includes a plurality of water bucket devices, a plurality of hanging structures and a plurality of generators. The water bucket devices are correspondingly suspended between the spraying openings and the water pool through the hanging structures. The plurality of water bucket devices are uniformly arranged in the horizontal plane direction, and the water bucket devices are correspondingly drivingly connected to the generators.

[0022] In some alternative embodiments, the height difference between the water bucket device and the spraying orifice is 3 - 10 m.

[0023] Compared with the prior art, the device for improving the cooling effect of a forced draft cooling tower and reducing noise and generating energy of the present utility model can intercept the water flowing directly down in the forced draft cooling tower. The kinetic energy of the water is used to drive the operation of the water bucket device, which in turn drives the generator to operate. This can not only reduce noise but also convert the potential energy of the falling water into kinetic energy to generate electricity. In addition, the residence time of water in the air is increased, improving the cooling effect of the water and avoiding the need to increase the scale of the forced draft cooling tower. Therefore, the effects of water cooling, noise reduction, and additional electricity generation can be achieved.

[0024] Compared with the traditional methods of increasing the cooling effect in existing power stations, such as increasing the number of top induced draft fans, increasing the fan rotation speed and power, and increasing the construction height of the forced draft cooling tower:

[0025] 1. In the traditional method, additional fans are required and the operating power of the fans needs to be increased (the single - unit power of such induced draft fans is about 200 - 350 kW). The manufacturing cost of a single such high - power fan is very high (at least 400,000 yuan), and the electricity consumed by each induced draft fan (300 kW per hour) will be a significant expense. In contrast, the present utility model installs multiple groups of small water bucket devices (single - unit power 1 - 5 kW, price 20,000 yuan). In terms of raw materials, manufacturing, and installation costs, even if ten groups of water bucket devices are installed, the total installation cost on the forced draft cooling tower is still much lower (total cost 300,000 yuan). Moreover, the device installed in the present utility model can generate a certain amount of electricity (calculated according to an energy conversion efficiency of 30%, at least 0.3 - 1.5 kW of electricity can be generated per hour by a single water bucket device). The traditional method consumes energy, while the present utility model generates energy. Therefore, the economic effects of the traditional method and the present utility model are significantly different.

[0026] 2. Increasing the construction height of the forced draft cooling tower, although it also increases the contact time between water and the surrounding air, has a long civil engineering cycle and high construction costs (an additional 2 million yuan or more for civil engineering alone), and the increased cost is much greater than that of the present utility model.

[0027] Moreover, increasing the height of the forced draft cooling tower brings another problem: as the height difference of the falling water increases, the noise value of the water falling into the pool will increase. It is measured that at ground level (elevation 2 - 3 m) and at the wall of the forced draft cooling tower pool, the measured noise is mostly 135 - 100 dB. Therefore, in general power stations (especially those located close to villages and residential areas), the forced draft cooling tower is usually set in the center of the power plant area, and then additional enclosures are built around it or noise - proof enclosures are constructed to achieve the purpose of noise reduction.

[0028] Therefore, the advantages and novelty of the present utility model in improving cooling and reducing falling water noise are reflected in:

[0029] (1) Unlike other existing technologies, the device and method are not added to the original operation steps of the power station, and do not change or interfere with the working process of the original power generation cooling water system. Therefore, whether the method and device of the present utility model are added or removed does not affect the operation of the power station.

[0030] For improving the cooling effect, the conventional idea is to achieve it by increasing power-consuming and energy-consuming equipment. The present utility model does not blindly follow the idea of increasing the number and power of induced draft fans and the height of cooling towers to improve the cooling effect. Instead, the water bucket device of the present utility model utilizes the decomposition of the energy type of the water flow itself, without the risk of additional noise emission. Instead, it breaks the fixed idea and artificially changes and lengthens the falling path of the originally freely falling water flow by increasing the water bucket to retard the water flow and increasing its air retention time. The present utility model does not consume additional energy in this process.

[0031] (2) The falling water flow formed by the present utility model is rotated and dispersed by the dividing net on the water bucket during the process of pushing the water bucket to rotate, making the large water droplets fine and fragmented (the large water droplets become small water droplets and small water mists). The originally unchanged form and shape of the water droplets are artificially changed, increasing the surface area of contact between the water droplets and the air flow, so that the heat exchange efficiency between the water flow per unit volume and the air per unit time is improved, and thus the cooling effect is increased. And a part of the gravitational potential energy of the water flow will be converted into electric energy through the kinetic energy generated by pushing the water bucket to rotate. This part is the electric energy generated outside the power plant's plan, which is equivalent to additional income. As the potential energy is consumed in the process of pushing the water bucket, the kinetic energy carried by each water droplet when it finally falls into the bottom pool of the cooling tower will decrease, and the generated noise will be reduced. In actual use, after the water bucket device is installed and used, the measured noise at the pool wall is < 70 dB, which is much lower than the usual value of 135 - 100 dB, and the noise at 1 meter from the factory boundary is even lower, about 50 dB. Therefore, the present utility model cools the water, reduces the noise, and generates electricity through the added water bucket device, achieving three goals with one action.

[0032] (3) Suppose each generator connected to the selected water bucket device has a capacity of 1 kilowatt. Currently, the dimensions of the mechanical draft cooling tower are 55 meters in length × 21 meters in width × 38 meters in height (the power plant where the utility model inventor is located). Calculated based on the installation of at least 10 generators, as long as the power station units are generating electricity, the circulating water will be used, and the water bucket device can drive the generator to generate electricity. Considering that the energy conversion rate is only 30%, the effective working hours per day are 20 hours, and the power station generates electricity for 200 days throughout the year, at least 10,000 kWh of electric energy can be additionally generated, which fully meets the daily needs such as internal office and lighting in the power station. If the facilities of the present utility model are not installed, this part of the energy (the potential energy of the circulating cooling water) will not be utilized. Even if the additional electricity generation benefits (or the cost savings) are not calculated, simply from the two aspects of improving the cooling effect to enhance the overall power generation efficiency (fuel utilization rate) of the power station units and reducing noise to save expenses on sound insulation measures, the present utility model has a very high application prospect.

[0033] In order to more clearly understand the present utility model, the following will describe the specific implementation manners of the present utility model in conjunction with the accompanying drawings. Description of the Drawings

[0034] Figure 1 Simplified structural schematic diagram of the mechanical draft cooling tower and the device for improving the cooling effect of the mechanical draft cooling tower and capable of reducing noise and generating energy in an embodiment of the present utility model;

[0035] Figure 2 Structural schematic diagram of the device for improving the cooling effect of the mechanical draft cooling tower and capable of reducing noise and generating energy in an embodiment of the present utility model;

[0036] Figure 3 Exploded view of the water bucket device in an embodiment of the present utility model;

[0037] Figure 4 Cross-sectional view of the water bucket device in an embodiment of the present utility model;

[0038] Figure 5 Cross-sectional view of the water bucket device in another embodiment of the present utility model;

[0039] Figure 6 Structural schematic diagram of the water bucket in another embodiment of the present utility model;

[0040] Figure 7 Simplified structural schematic diagram of the top of the mechanical draft cooling tower and the device for improving the cooling effect of the mechanical draft cooling tower and capable of reducing noise and generating energy in an embodiment of the present utility model.

[0041] Explanation of the reference numerals:

[0042] 10. Main body; 20. Cooling fan; 30. Water pool; 40. Return water pipe; 50. Bucket device; 51. Bucket; 52. Central shaft; 53. Water trough; 54. End plate; 55. Partition net; 60. Hanging structure; 61. Bearing; 62. Suspension rod; 70. Generator; 80. Battery. Detailed implementation manners

[0043] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality of" is two or more, and the meaning of "several" is one or more. In addition, unless otherwise specified, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features.

[0044] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model 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 a limitation to the present utility model.

[0045] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0046] In the description of the present utility model, the descriptions referring to terms such as "one embodiment", "some alternative embodiments" or "some alternative examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0047] Please refer to Figure 1 , an embodiment of the present utility model provides a device for improving the cooling effect of a mechanical draft cooling tower and reducing noise during production, which is applied to a mechanical draft cooling tower. The mechanical draft cooling tower includes a main body 10, a cooling fan 20, a water tank 30 and a circulating water pump. A cooling air duct is formed on the main body 10, and a spraying port is arranged in the cooling air duct. The water tank 30 is arranged at the bottom of the cooling air duct. The cooling fan 20 and the spraying port are arranged in the cooling air duct in sequence from top to bottom. The circulating water pump is respectively communicated with the water tank 30 and the spraying port. Specifically, the water tank 30, the circulating water pump, the steam turbine condenser, the return water pipe 40 and the spraying port are communicated in sequence to form a cooling water circulation. The device for improving the cooling effect of a mechanical draft cooling tower and reducing noise during production includes: a water bucket device 50, a hanging structure 60 and a generator 70. The hanging structure 60 is connected to the main body 10. The water bucket device 50 is hung between the spraying port and the water tank 30 through the hanging structure 60. The water bucket device 50 is drivingly connected to the generator 70 for driving the generator 70 to generate electricity. The generator 70 is connected to a storage battery 80, and the storage battery is used for storing electric energy for subsequent comprehensive utilization of electric energy.

[0048] The water bucket device 50 includes a plurality of water buckets 51 and a central shaft 52. The plurality of water buckets 51 are uniformly arranged around the central shaft 52. A water trough 53 is arranged on the water bucket 51, and the water trough 53 is located behind the water bucket 51 in the working rotation direction. The central shaft 52 is rotationally matched with the hanging structure 60 and is drivingly connected to the generator 70.

[0049] After the water flows out of the spraying port, the falling water flow will enter the water trough 53 and push the water bucket device 50 to rotate relative to the hanging structure 60 in the working rotation direction, thereby driving the generator 70 to generate electricity. The generator 70 is connected to the storage battery 80 outside the cooling tower building through a connecting wire for storing the electric energy after power generation. Each water bucket device 50 is independently equipped with an independent storage battery 80.

[0050] After the water flowing out from the spraying openings of the forced-draft cooling tower falls, it will first land on the water trough 53 of the water bucket device 50. After the bucket trough is filled with water, it will rotate around the central axis 52 under the drive of gravity. When the water bucket 51 rotates until the water trough 53 faces downward, the water will flow out from the water trough 53. The multiple water troughs 53 alternately hold water and let it fall, realizing the rotation of the water bucket device 50. In this process, the water that originally freely fell from the spraying openings directly "forces" a part of its kinetic energy to be transferred to the water bucket device 50 at the water bucket device 50, reducing the kinetic energy of the water, and then the water continues to fall. Therefore, this is equivalent to increasing the overall residence time of the water in the air under the condition of keeping the original height of the forced-draft cooling tower unchanged, improving the cooling effect on the water, and at the same time using the gravity of the falling water to drive the water bucket device 50 to do work and generate electricity. In addition, since the kinetic energy of the falling water is transferred to the water bucket device 50, the kinetic energy of the falling water is reduced, so that the noise generated when the water falls into the water pool 30 is also reduced.

[0051] In this embodiment, the central axis 52 is usually made of a stainless steel pipe with a length of 7 - 12 mm, a diameter Φ of 88 - 168 mm, and a wall thickness δ of 15 - 24 mm. The water bucket 51 is bent from a stainless steel plate with a wall thickness δ of 3 - 8 mm. The water trough 53 is formed at the concave surface after the water bucket 51 is bent. The radius of the water trough 53 is about 1.5 - 2.2 m; the water bucket device 50 further includes two end plates 54 with a radius of about 1.5 - 3 m. The end plates 54 are arranged on the central axis 52 and are respectively arranged at both ends of the water bucket 51. The two end plates 54 correspondingly close the gaps at both ends of the water trough 53, thereby preventing water from leaking out from both ends of the water trough 53.

[0052] Of course, the water trough 53 can also be formed in other suitable ways, not limited to the above way. In addition, the sizes of the central axis 52, the water bucket 51, and the end plates 54 can also be adjusted according to the actual situation, not limited to the above sizes.

[0053] The specific number of the water buckets 51 can be designed according to actual needs. For example, in some alternative embodiments, the water bucket device 50 includes three water buckets 51, and the three water buckets 51 are spaced 120° from each other. Or, the water bucket device 50 includes five water buckets 51, and the five water buckets 51 are spaced 72° from each other.

[0054] In some alternative embodiments, a dividing net 55 is provided at the opening of the water trough 53. When the water flows out from the water trough 53, the water body is divided and dispersed by the dividing net 55 on the water bucket 51, so that the water scatters down, increasing the surface area of contact between the water flow and the air, improving the heat dissipation efficiency of the water, and further improving the cooling effect of the water.

[0055] The formation method of the dividing net 55 can be designed according to actual needs. For example, in some alternative embodiments, the dividing net 55 includes a plurality of horizontal bars and a plurality of vertical bars. The plurality of horizontal bars are arranged side by side at the opening of the water tank 53, and the plurality of vertical bars are arranged side by side at the opening of the water tank 53. The horizontal bars and the vertical bars intersect each other, and a plurality of diamond-shaped meshes are formed between the plurality of horizontal bars and the plurality of vertical bars. Of course, the dividing net 55 can also adopt other suitable structures, and the formed mesh holes are not limited to diamond-shaped, and can also be rectangular, circular, oval, etc.

[0056] In order to improve the stability of the structure, in some alternative embodiments, the water bucket 51, the central shaft 52, and the end plate 54 are welded together, and the water bucket 51, the horizontal bars, and the vertical bars are welded together.

[0057] In some alternative embodiments, the hanging structure 60 includes two bearings 61 and two hanging rods 62. The hanging rods 62 are connected to the main body 10. The length of the hanging rods 62 can be designed according to the height that the actual water bucket device 50 needs to be hung. The hanging rods 62 can be fixed to the concrete wall or frame of the main body 10 through expansion bolts. Of course, the hanging rods 62 can also adopt other suitable installation methods. The bearings 61 are arranged on the hanging rods 62. The central shaft 52 is rotatably inserted through the bearings 61. The water bucket 51 is located between the two bearings 61. The bearings 61 can enable the entire water bucket device 50 to rotate freely relative to the hanging rods 62.

[0058] The central shaft 52 can be connected to the generator 70 through a common differential, which is convenient for the generator 70 and the central shaft 52 to be separated from each other during maintenance. Among them, the installation method of the generator 70 can be designed according to the power generation principle of the generator 70, and the structure and principle of the generator 70 are well-known technologies to those skilled in the art, and will not be elaborated here.

[0059] According to the size of the mechanical draft cooling tower, in some alternative embodiments, the equipment for improving the cooling effect of the mechanical draft cooling tower and reducing noise production includes a plurality of water bucket devices 50, a plurality of hanging structures 60, and a plurality of generators 70. The water bucket devices 50 are correspondingly hung between the spraying ports and the water pool 30 through the hanging structures 60. The plurality of water bucket devices 50 are arranged uniformly in the horizontal plane direction. The water bucket devices 50 are correspondingly drivingly connected to the generators 70. Power generation is realized through the arranged multiple groups of water bucket devices 50, and the electric energy is stored in the storage battery 80 for comprehensive utilization. The electric energy can be comprehensively utilized and connected to the in-plant line. Although this part of the electric energy is not transmitted to the power grid, it can be used for office, lighting, etc. For the power station, this belongs to another form of electricity conservation.

[0060] In some alternative embodiments, the height difference between the water bucket device 50 and the spraying orifice is 3 - 10 m, which can avoid insufficient kinetic energy of the water flow when the water bucket device 50 is too close to the spraying orifice, and can also avoid affecting the generation of air flow when the water bucket device 50 is too close to the cooling fan 20, thus affecting the normal circulating cooling of the power station. Generally, the height of the cooling fan 20 is usually 40 - 45 m, the height of the spraying orifice is usually 30 - 35 m, and the height of the water bucket device 50 is 20 - 25 m.

[0061] Taking the power station where the inventor of the present utility model is located as an example:

[0062] The forced draft cooling tower is 55 m long, 21 m wide and 38 m high, and the height of the spraying orifice of the top circulating water return pipe is 29.2 m. Therefore, 10 groups of water bucket devices 50 are arranged at a height of 25 m.

[0063] According to the dimensions of the forced draft cooling tower, the dimensions of the water bucket device 50 are as follows: the length of the central shaft 52 (component 1) is 10 m, the dimension Φ is 159 mm, the wall thickness δ is 12 mm, the wall thickness δ of the water bucket 51 groove is 6 mm, the bending radius is 1.8 m, the length is 8 m and the width is 2 m. The dividing net 55 is welded into a diamond-shaped hole steel grid using a stainless steel round bar with Φ = 3 mm, and the hole size is about 10 cm. The end plate 54 uses a circular stainless steel with a radius of 2.3 m and a wall thickness δ of 6 mm, and is welded to the water bucket 51 to form a bucket groove.

[0064] When the unit is shut down, the circulating water pump is closed, the central shaft 52 is connected to the hanging rod 62 through the bearing 61, and the upper part of the hanging rod 62 is fixed to the concrete frame on the inner wall of the forced draft cooling tower main body 10 through expansion bolts. The generator 70 connected to the central shaft 52 is electrically connected to the storage battery 80 through a connecting cable.

[0065] After the unit is started, after the circulating water flows through, it flows out from the spraying orifice of the return water pipe 40, and then falls from the forced draft cooling tower. The falling water flow pushes the water bucket 51 and the generator 70 to rotate to generate electric energy.

[0066] The electric energy of the storage battery 80 is used according to actual needs.

[0067] When the unit is shut down and under maintenance, the circulating water pump is closed, the cooling water in the forced draft cooling tower stops falling, and the storage battery 80 is closed.

[0068] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A device for improving the cooling effect of a mechanical ventilation tower and reducing noise and production capacity, applied to a mechanical ventilation tower of a power station, the mechanical ventilation tower comprising a main body, a cooling fan, a water pool and a circulating water pump, a cooling air duct formed on the main body, a spraying port arranged in the cooling air duct, the water pool arranged at the bottom of the cooling air duct, the cooling fan and the spraying port arranged in sequence from top to bottom in the cooling air duct, the circulating water pump connected to the water pool and the spraying port respectively, characterized in that: include: A water bucket device, a hanging structure and a generator, wherein the hanging structure is connected to the main body, the water bucket device is hung between the spray port and the water pool through the hanging structure, the water bucket device is drivingly connected to the generator to drive the generator to generate electricity, and the generator is connected to a battery; The water bucket device includes a central axis and multiple water buckets, and the multiple water buckets are evenly arranged around the central axis. The water buckets are provided with water troughs, and the water troughs are located behind the water buckets in the working rotation direction. The central axis is rotationally matched with the suspension structure and is drivingly connected to the generator.

2. The device for improving the cooling effect of a mechanical ventilation tower and reducing noise and production capacity according to claim 1, characterized in that: The water bucket is formed by bending a stainless steel plate, and the water tank is formed at the concave surface of the water bucket after bending; The water bucket device also includes two end plates, which are arranged on the central axis and respectively arranged at the two ends of the water bucket. The two end plates correspond to closing the gaps at the two ends of the water tank.

3. The device for improving the cooling effect of a mechanical ventilation tower and reducing noise and production capacity according to claim 2, characterized in that: The water bucket, the central axis and the end plate are welded together.

4. The device for improving the cooling effect of a mechanical ventilation tower and reducing noise and production capacity according to claim 1, characterized in that: The water bucket device comprises three water buckets, and the three water buckets are spaced 120 degrees apart from each other; Alternatively, the water bucket device includes five water buckets, and the five water buckets are spaced 72° apart from each other.

5. The device for improving the cooling effect of a mechanical ventilation tower and reducing noise and production capacity according to claim 1, characterized in that: A dividing net is arranged at the opening of the water tank.

6. The device for improving the cooling effect of a mechanical ventilation tower and reducing noise and production capacity according to claim 5, characterized in that: The dividing net includes a plurality of horizontal bars and a plurality of vertical bars, wherein the plurality of horizontal bars are arranged side by side at the opening of the water tank, and the plurality of vertical bars are arranged side by side at the opening of the water tank, the horizontal bars and the vertical bars cross each other, and a plurality of diamond grids are formed between the plurality of horizontal bars and the plurality of vertical bars.

7. The device for improving the cooling effect of a mechanical ventilation tower and reducing noise and production capacity according to claim 6, characterized in that: The water bucket, the horizontal rod and the vertical rod are welded together.

8. A device for improving the cooling effect of a mechanical ventilation tower and reducing noise and production capacity according to any one of claims 1 to 7, characterized in that: The hanging structure includes two bearings and two suspension rods, the suspension rods are connected to the main body, the bearings are arranged on the suspension rods, the central axis is rotatably passed through the bearings, and the water bucket is located between the two bearings.

9. A device for improving the cooling effect of a mechanical ventilation tower and reducing noise and production capacity according to any one of claims 1 to 7, characterized in that: It includes a plurality of water bucket devices, a plurality of hanging structures and a plurality of generators. The water bucket devices are hung between the spray port and the water pool through the hanging structures. The plurality of water bucket devices are evenly arranged along the horizontal plane. The water bucket devices are connected to the generator drive.

10. A device for improving the cooling effect of a mechanical ventilation tower and reducing noise and production capacity according to any one of claims 1 to 7, characterized in that: The height difference between the water bucket device and the spraying port is 3-10m.

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