Natural ventilation cooling tower with fog dispersal, water saving and deicing functions

Abstract

The utility model discloses a fog dispersal, water saving and deicing natural ventilation cooling tower which comprises a tower body, a first water distribution area, a second water distribution area and a heat exchange module are arranged in the tower body from top to bottom, a plurality of first water distribution spray heads are arranged in the first water distribution area, a plurality of second water distribution spray heads are arranged in the second water distribution area, and the heat exchange module is connected with the first water distribution area and the second water distribution area. The heat exchange module is divided into a plurality of wet area channels and dry area channels which are arranged in a staggered mode, and the water spraying faces of the multiple second water distribution sprayers are aligned to inlets located above the multiple wet area channels correspondingly. The second water distribution area and the heat exchange module are arranged in a matched mode, so that the water amount lost by evaporation heat dissipation can be effectively reduced, and the fog dissipation effect is improved; working modes can be changed according to seasons, the second water distribution area is operated in low-temperature weather in autumn and winter, fog dispersal, water saving and deicing states are entered, the first water distribution area is switched to be put into operation in high-temperature weather in summer, the cooling effect of the cooling tower is good, and the production requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of energy conservation of natural draft cooling towers, in particular to a natural draft cooling tower for fog elimination, water saving and ice melting. Background Art

[0002] In the cooling water circulation system of a power plant condenser, a natural draft cooling tower is usually used to cool the water discharged from the condenser. Traditional natural draft cooling towers all use the combination of "water distribution trough + water distribution nozzles" for water distribution. The nozzles are evenly distributed throughout the cooling tower, and the water discharged from the nozzles is evenly scattered on the top surface of the packing. "Full-contact heat exchange" occurs between the water and the upward cold air in the packing flow channels. The heated and humidified gas (supersaturated water vapor with a large moisture content) is discharged outside the cooling tower into the atmosphere.

[0003] The amount of water lost due to evaporation and heat dissipation in "full-contact heat exchange" is large. Usually, for a cooling tower with a 10°C temperature difference, the amount of water lost due to evaporation and heat dissipation is about 1.5% of the total circulating water volume. Moreover, when the supersaturated water vapor is discharged outside the cooling tower in winter, it will contact the cold atmosphere and condense into water droplets and water mist, forming a thick "white fog" above the cooling tower, and it is like a light rain around the cooling tower, polluting the environment.

[0004] In the prior art, a coil is added in front of the circulating water entering the cooling tower, and the circulating water to be cooled is passed into the coil. A high-power blower blows air to dissipate heat from the coil to initially reduce the temperature of the circulating water, and then the water discharged from the coil enters the cooling tower for further cooling, so as to reduce the amount of water lost due to evaporation and heat dissipation. However, the above method requires an additional coil and a high-power blower outside the cooling tower, resulting in large investment, large floor area, high power consumption, and the effects of fog elimination and water saving are still not ideal enough. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a natural draft cooling tower for fog elimination, water saving and ice melting that can effectively reduce the amount of water lost due to evaporation and heat dissipation and improve the fog elimination effect.

[0006] In order to solve the above technical problem, the natural draft cooling tower for fog elimination, water saving and ice melting provided by the utility model adopts the following technical scheme:

[0007] A natural draft cooling tower for fog elimination, water saving and ice melting includes a tower body. Inside the tower body, a first water distribution area, a second water distribution area and a heat exchange module are arranged from top to bottom. A plurality of first water distribution nozzles are arranged in the first water distribution area, a plurality of second water distribution nozzles are arranged in the second water distribution area, the heat exchange module is divided into a plurality of wet area channels and dry area channels arranged alternately, and the water spraying surfaces of the plurality of second water distribution nozzles are respectively aligned with the upper entrances of the plurality of wet area channels.

[0008] By adopting the above technical solutions, in hot summer days, multiple second water distribution nozzles in the second water distribution area are closed, and multiple first water distribution nozzles in the first water distribution area are opened. The sprayed water can be fully distributed in the wet area channel and the dry area channel of the heat exchange module, and simultaneously carry out "contact heat exchange" and "non-contact heat exchange" with the upward dry cold air in the heat exchange module, enabling the cooling tower to achieve a better cooling effect, so as to adapt to the cooling circulating water operation with a greater cooling demand in hot summer days. Moreover, due to the high air temperature in summer, when the supersaturated water vapor is discharged from the cooling tower, there will be no situation of generating a large amount of water mist when encountering cold. In autumn and winter with low temperatures, multiple first water distribution nozzles in the first water distribution area are closed, and multiple second water distribution nozzles in the second water distribution area are opened. The sprayed water can enter the wet area channel of the heat exchange module. Since 90% of the cross-section of the wet area channel is filled with the downward water flow, only about 10% of the flow channel space is available for the upward dry cold air to conduct "contact heat exchange" therewith. Most of the dry cold air passes through the dry area channel from bottom to top, and the downward water droplets and the upward air conduct "non-contact heat exchange" through the partition heat exchange device. While cooling the circulating water, the moisture content of the gas discharged from the cooling tower is significantly reduced, thereby significantly reducing the amount of water lost due to evaporation heat dissipation, and being able to reduce the situation of generating water mist and water droplets when the supersaturated water vapor discharged in winter contacts the cold atmosphere, significantly improving the fog elimination effect.

[0009] In autumn and winter with low temperatures, the second water distribution area is put into operation, and the cooling tower switches to the operation state of fog elimination and water conservation; in hot summer days, it switches to the operation of the first water distribution area, and the cooling tower has a good cooling effect to meet the production needs. Compared with the coil pipe and the blower, the above structure does not need to increase the peripheral floor area of the natural ventilation cooling tower, and does not increase the operation energy consumption of the cooling tower.

[0010] Optionally, the second water distribution area is sequentially provided with a sparse area, a sub-dense area and a dense area from its center to the periphery, and the distribution density of the first water distribution nozzles in the sparse area, the sub-dense area and the dense area increases in turn.

[0011] By adopting the above technical solutions, since the circumference near the air inlet of the tower body (i.e., the dense area) is an area with a large air volume, the air volume is smaller the closer to the center of the tower body. In the heat exchange module in the area with a large air volume, there will be problems such as easy icing and even ice columns hanging in winter, which will affect the cooling process of the circulating water. Therefore, when the second water distribution area is in operation, the water distribution density is set according to the size of the air flow entering the tower. The water volume in the dense area is large, and the water volume in the sparse area is small. Increasing the sprinkling density in the dense area can significantly reduce the phenomenon of icing in the heat exchange module in winter, achieving a significant ice melting effect, so as to make the air-water ratio of the heat exchange module reach the best state.

[0012] Optionally, a plurality of main water distribution pipes are arranged in the second water distribution area, which are circumferentially and uniformly distributed around the central axis of the tower body. A plurality of annular secondary water distribution pipes are fixedly connected and communicated with the main water distribution pipes. The secondary water distribution pipes are coaxially arranged with the tower body and are spaced apart from the central axis of the tower body in sequence; the plurality of second water distribution nozzles are connected and uniformly arranged on the secondary water distribution pipes, and the distribution intervals of the secondary water distribution pipes in the sparse area, the sub-dense area and the dense area are gradually reduced.

[0013] By adopting the above technical solution, through the arrangement of the intervals of the secondary water distribution pipes in the sparse area, the sub-dense area and the dense area, a structural arrangement is realized in which the distribution density of the first water distribution nozzles in the sparse area, the sub-dense area and the dense area increases in sequence.

[0014] Optionally, the tower body is provided with a water inlet pipe. The plurality of first water distribution nozzles and second water distribution nozzles are all communicated with the water inlet pipe. The communication port of the first water distribution nozzle and the water inlet pipe is located above the communication port of the second water distribution nozzle and the water inlet pipe. An electric valve is arranged on the connection path between the second water distribution nozzle and the water inlet pipe.

[0015] By adopting the above technical solution, since the second water distribution area is located below the first water distribution area, when the electric valve is opened, the water in the water inlet pipe will all flow to the plurality of second water distribution nozzles in the second water distribution area under the influence of gravity, so that the second water distribution area is put into operation; after the electric valve is closed, the water level in the water inlet pipe automatically rises and flows into the plurality of second water distribution nozzles in the first water distribution area, so that the first water distribution area is put into operation. The working modes in seasonal changes are all automatically switched, which simplifies the process and reduces the labor cost.

[0016] Optionally, the heat exchange module includes a heat exchange packing plate arranged below the second water distribution area. The partition heat exchange device is embedded in the heat exchange packing plate, and the partition heat exchange device divides the heat exchange packing plate into a plurality of wet area channels and dry area channels arranged alternately.

[0017] By adopting the above technical solution, the heat exchange packing plate can provide a long enough heat exchange path for the water vapor, so that the water vapor can be fully heat exchanged.

[0018] Optionally, a plurality of main water distribution tanks and auxiliary water distribution tanks are arranged in the first water distribution area, which are circumferentially and uniformly distributed around the central axis of the tower body. The plurality of main water distribution tanks and auxiliary water distribution tanks are fixedly connected and communicated with each other. The first water distribution nozzles are uniformly arranged and communicated with the plurality of main water distribution tanks and auxiliary water distribution tanks.

[0019] By adopting the above technical solution, the first water distribution area can evenly spray water on the heat exchange module for heat exchange to ensure the cooling effect. When the second water distribution area is put into operation, a small amount of hot and humid gas (saturated hot and humid gas with a large moisture content) ascending through the wet area channel and a large amount of dry and hot gas (unsaturated dry and hot gas with a small moisture content) ascending through the dry area channel will collide with a plurality of main water distribution tanks and auxiliary water distribution tanks arranged evenly, so that the small amount of hot and humid gas and the large amount of dry and hot gas are stirred and mixed after passing through the first water distribution area, further reducing the overall humidity of the discharged gas and reducing the possibility of water mist and water droplets still appearing due to a large humidity in a local discharged gas.

[0020] Optionally, a dehumidifier is arranged above the first water distribution area.

[0021] By adopting the above technical solution, the dehumidifier dehumidifies the gas after heat exchange, further reducing the overall humidity of the discharged gas and further improving the effect of fog elimination and water conservation.

[0022] Optionally, the dehumidifier includes a plurality of arc-shaped guide plates arranged on the tower body. The arc-shaped cross-sections of the plurality of arc-shaped guide plates are all vertically arranged, and the plurality of arc-shaped guide plates are arranged at intervals in the horizontal direction.

[0023] By adopting the above technical solution, the gas after heat exchange rises through the gaps between the plurality of arc-shaped guide plates. During the rising process, the gas will collide with the convex surfaces of the arc-shaped guide plates, thereby intercepting and collecting the fog particles and liquid droplets carried in the gas. Finally, they fall into the cooling tower, further reducing the overall humidity of the discharged gas to improve the effect of fog elimination and water conservation.

[0024] Optionally, dehumidifying claw pieces are arranged at the convex surfaces of the arc-shaped guide plates. The dehumidifying claw pieces are in an arc-shaped sheet structure and the arc opening direction thereof is downward.

[0025] By adopting the above technical solution, when the gas rises through the gaps between the plurality of arc-shaped guide plates, it is easier to collide with the dehumidifying claw pieces, enabling more sufficient interception and collection of the fog particles and liquid droplets carried in the gas, and further improving the effect of fog elimination and water conservation.

[0026] Optionally, the distance between the dehumidifier and the first water distribution area is 2 - 5 meters.

[0027] By adopting the above technical solution, the dehumidifier and the first water distribution area are arranged at the above distance to provide sufficient space for sufficient mixing of water vapor, so that the hot and humid gas and the dry and hot gas are fully mixed.

[0028] In summary, the present utility model includes at least one of the following beneficial technical effects:

[0029] 1. The second water distribution area is put into operation, and the cooling tower operates in the fog elimination and water saving state; in hot summer days, it switches to the first water distribution area for operation, and the cooling tower has good cooling effect to meet the production needs. Compared with the coil pipe and the blower, the above structure does not need to increase the peripheral floor area of the natural draft cooling tower and does not increase the operating energy consumption of the cooling tower;

[0030] 2. When the second water distribution area is operating, the water distribution density is set according to the size of the air flow entering the tower, that is, the water volume in the dense area is large and the water volume in the sparse area is small. Increasing the water spraying density in the dense area can significantly reduce the phenomenon of icing of the heat exchange module in winter, achieving a significant ice melting effect, so that the air-water ratio of the heat exchange module reaches the best state;

[0031] 3. A small amount of hot and humid gas ascending through the wet area channel collides with a large amount of dry and hot gas ascending through the dry area channel at multiple main water distribution tanks and auxiliary water distribution tanks, so that the small amount of hot and humid gas and the large amount of dry and hot gas are stirred and mixed after passing through the first water distribution area, further reducing the overall humidity of the discharged gas and reducing the possibility of water mist and water droplets still appearing due to the large humidity of the locally discharged gas. Description of the Drawings

[0032] Figure 1 It is a schematic cross-sectional structure diagram of the natural draft cooling tower in the present utility model.

[0033] Figure 2 It is a schematic top view structure diagram of a 1 / 4 fan-shaped area of the first water distribution area in the present utility model.

[0034] Figure 3 It is a schematic top view structure diagram of a 1 / 8 fan-shaped area of the second water distribution area in the present utility model.

[0035] Figure 4 It is a schematic top view structure diagram of the heat exchange module in the present utility model.

[0036] Figure 5 It is a working principle diagram of the heat exchange module in the present utility model.

[0037] Figure 6 It is a schematic partial structure diagram of the dehumidifier in the present utility model.

[0038] Description of the reference numerals: 1, tower body; 11, water inlet pipe; 12, electric valve; 13, mixing area one; 14, mixing area two; 2, first water distribution area; 21, first water spraying nozzle; 22, main water distribution tank; 23, auxiliary water distribution tank; 3, second water distribution area; 31, second water spraying nozzle; 32, main water distribution pipe; 33, water distribution sub-pipe; 4, heat exchange module; 41, heat exchange packing plate; 411, wet area channel; 412, dry area channel; 42, partition heat exchange device; 5, sparse area; 6, sub-dense area; 7, dense area; 8, dehumidifier; 81, arc-shaped guide plate; 82, dehumidifying claw; 83, assembly rod. Detailed implementation mode

[0039] The following will further elaborate on the present utility model in conjunction with the attached Figure 1-6 drawings.

[0040] An embodiment of the present utility model discloses a natural draft cooling tower for fog elimination, water conservation, and ice melting. Referring to Figure 1 , the natural draft cooling tower for fog elimination, water conservation, and ice melting includes a tower body 1, a first water distribution area 2, a second water distribution area 3, a heat exchange module 4, and a dehumidifier 8. The dehumidifier 8, the first water distribution area 2, the second water distribution area 3, and the heat exchange module 4 are sequentially and spacedly arranged in the tower body 1 from top to bottom. The dehumidifier 8, the first water distribution area 2, the second water distribution area 3, and the heat exchange module 4 divide the internal space of the tower body 1 along its axis. An inlet water pipe 11 is arranged at the central axis of the tower body 1, and the inlet water pipe 11 is parallel to the central axis of the tower body 1.

[0041] Referring to Figure 1 and Figure 2 , a plurality of main water distribution troughs 22 are arranged in the first water distribution area 2. The plurality of main water distribution troughs 22 are circumferentially and evenly arranged around the central axis of the tower body 1, and the plurality of main water distribution troughs 22 are fixedly connected to the inlet water pipe 11. A plurality of auxiliary water distribution troughs 23 are fixedly connected between the plurality of main water distribution troughs 22. The plurality of auxiliary water distribution troughs 23 are circumferentially and evenly arranged around the central axis of the tower body 1. The plurality of main water distribution troughs 22 and the auxiliary water distribution troughs 23 are all provided with upper openings, and a plurality of first water distribution nozzles 21 are evenly arranged on the bottom surfaces of the plurality of main water distribution troughs 22 and the auxiliary water distribution troughs 23. The water spraying direction of the first water distribution nozzles 21 is vertically downward.

[0042] Referring to Figure 1 and Figure 3 , a plurality of main water distribution pipes 32 are arranged in the second water distribution area 3. The plurality of main water distribution pipes are circumferentially and evenly arranged around the central axis of the tower body 1. The plurality of main water distribution pipes 32 are fixedly connected to the inlet water pipe 11, and an electric valve 12 is arranged between each of the plurality of main water distribution pipes 32 and the inlet water pipe 11. A plurality of annular water distribution sub-pipes 33 are fixedly connected to the plurality of main water distribution pipes 32 together. The plurality of water distribution sub-pipes 33 are all coaxially arranged with the tower body 1, and the plurality of water distribution sub-pipes 33 are sequentially arranged at intervals away from the central axis of the tower body 1. A plurality of first water distribution nozzles 21 are evenly arranged on the bottom surfaces of the plurality of water distribution sub-pipes 33. The water spraying direction of the first water distribution nozzles 21 is vertically downward.

[0043] Since the second water distribution area 3 is located below the first water distribution area 2, when the electric valve 12 is opened, the water in the inlet water pipe 11 will all flow to the main water distribution pipes 32 in the second water distribution area 3 under the influence of gravity, so that the second water distribution area 3 is put into operation; after the electric valve 12 is closed, the water level in the inlet water pipe 11 automatically rises and flows into the main water distribution troughs 22 in the first water distribution area 2, so that the first water distribution area 2 is put into operation. The switching of the working mode is automatically switched, simplifying the process and reducing the labor cost.

[0044] Referring toFigure 1 , Figure 4 and Figure 5 , the heat exchange module 4 includes a heat exchange packing plate 41 and a partition heat exchange device 42. The heat exchange packing plate 41 is arranged below the second water distribution area 3. The heat exchange packing plate 41 is fixedly connected to the inner wall of the tower body 1 and perpendicular to the central axis of the tower body 1. The heat exchange packing plate 41 is made of a PVC film added with graphene. Compared with the existing PVC film packing, the heat exchange packing plate 41 has a smaller flow path diameter, a longer path, and a heat conductivity 1.5 - 1.6 times that of the PVC film packing, that is, its cooling ability is better than that of the PVC film packing, and it can provide a sufficiently long heat exchange path for the water vapor so that sufficient heat exchange can occur between the water vapor. The partition heat exchange device 42 is embedded in the heat exchange packing plate 41. The partition heat exchange device 42 is a heat conduction film. The partition heat exchange device 42 divides the heat exchange packing plate 41 into a plurality of wet area channels 411 and dry area channels 412 arranged alternately, effectively preventing the mutual mixing of gas and water. The water spraying surfaces of the plurality of second water spraying nozzles 31 are respectively aligned with the upper entrances located in the plurality of wet area channels 411.

[0045] In summer with high temperature weather, the electric valve 12 is closed, that is, the plurality of second water spraying nozzles 31 in the second water distribution area 3 are closed, and the plurality of first water spraying nozzles 21 in the first water distribution area 2 are opened. The sprayed water can be fully distributed in the wet area channels 411 and dry area channels 412 of the heat exchange module 4, and simultaneously perform "contact heat exchange" and "non-contact heat exchange" with the upward dry cold air in the heat exchange module 4, so that the cooling tower achieves a better cooling effect, in order to adapt to the cooling circulating water work with a greater cooling demand in summer high temperature weather, and because the air temperature is high in summer, when the supersaturated water vapor is discharged from the cooling tower, there will be no situation of generating a large amount of water mist when encountering cold air.

[0046] In autumn and winter with low temperature weather, the electric valve 12 is opened, that is, the plurality of first water spraying nozzles 21 in the first water distribution area 2 are closed, and the plurality of second water spraying nozzles 31 in the second water distribution area 3 are opened. The sprayed water can enter the wet area channels 411 of the heat exchange module 4. Since 90% of the cross-section of the wet area channels 411 is filled with the downward flowing water, only about 10% of the flow channel space is available for the upward dry cold air to perform "contact heat exchange" therewith. Most of the dry cold air flows from bottom to top through the dry area channels 412. The downward water droplets and the upward air perform "non-contact heat exchange" through the partition heat exchange device 42. While cooling the circulating water, the moisture content of the gas discharged from the cooling tower is significantly reduced, thereby significantly reducing the amount of water lost due to evaporation heat dissipation, and being able to reduce the situation of generating water mist and water droplets when the supersaturated water vapor is discharged in winter and contacting the cold atmosphere, significantly improving the demisting effect.

[0047] The second water distribution area 3 is put into operation, and the cooling tower switches to the fog elimination and water-saving operation mode; in hot summer days, it switches to the first water distribution area 2 for operation. The cooling tower has good cooling effect to meet the production needs. Compared with the coil pipes and blowers, the above structure does not require additional peripheral floor area for the natural draft cooling tower and does not increase the operating energy consumption of the cooling tower.

[0048] Moreover, when the second water distribution area 3 is put into operation, a small amount of hot and humid gas (saturated hot and humid gas with high moisture content) ascending through the wet area channel 411 and a large amount of dry and hot gas (unsaturated dry and hot gas with low moisture content) ascending through the dry area channel 412 will collide with a plurality of main water distribution troughs 22 and auxiliary water distribution troughs 23 arranged evenly, so that the small amount of hot and humid gas and the large amount of dry and hot gas are stirred and mixed after passing through the first water distribution area 2, further reducing the overall humidity of the discharged gas and reducing the possibility of water mist and water droplets still appearing due to relatively high humidity in a local area of the discharged gas.

[0049] Refer to Figure 3 , since the area near the circumference of the air inlet of the tower body 1 (i.e., the dense area 7) is a large air volume area, the air volume is smaller closer to the center of the tower body 1. The heat exchange module 4 in the large air volume area will have problems such as easy icing and even ice columns hanging in winter, affecting the cooling process of the circulating water. To solve this problem, the second water distribution area 3 is successively provided with a sparse area 5, a sub-dense area 6 and a dense area 7 from its center to the periphery, and the distribution intervals of the water distribution sub-pipes 33 located in the sparse area 5, the sub-dense area 6 and the dense area 7 gradually decrease.

[0050] Through the setting of the intervals of the water distribution sub-pipes 33 in the sparse area 5, the sub-dense area 6 and the dense area 7, the distribution density of the first water distribution nozzles 21 in the sparse area 5, the sub-dense area 6 and the dense area 7 increases successively. When the second water distribution area 3 is in operation, the water distribution density is set according to the size of the air flow entering the tower. The water volume in the dense area 7 is large and the water volume in the sparse area 5 is small. Increasing the sprinkling density in the dense area 7 can significantly reduce the phenomenon of icing of the heat exchange module 4 in winter, achieving a significant ice melting effect, so that the gas-water ratio of the heat exchange module 4 reaches the best state.

[0051] Refer to Figure 1 and Figure 6 , to further improve the fog elimination and water-saving effect, a dehumidifier 8 is arranged above the first water distribution area 2. The dehumidifier 8 includes a plurality of arc-shaped guide plates 81. The arc-shaped cross-sections of the plurality of arc-shaped guide plates 81 are all vertically arranged, and the plurality of arc-shaped guide plates 81 are arranged at intervals in the horizontal direction. A plurality of assembly rods 83 are fixedly connected to the inner wall of the tower body 1. The plurality of assembly rods 83 are all horizontally arranged and arranged at intervals in the vertical direction. The plurality of arc-shaped guide plates 81 are simultaneously fixedly connected to the arc-shaped guide plates 81. Dehumidifying claw pieces 82 are arranged at the convex surfaces of the arc-shaped guide plates 81. The dehumidifying claw pieces 82 are in an arc-shaped sheet structure and the arc-shaped opening direction thereof is downward.

[0052] The gas after heat exchange rises through the gaps between multiple arc-shaped guide plates 81. During the rising process, the gas will collide with the convex surfaces of the arc-shaped guide plates 81 and the dehumidifying claw pieces 82, thereby intercepting and collecting the fog particles and droplets entrained in the gas. Eventually, they fall into the cooling tower, further reducing the overall humidity of the discharged gas and enhancing the effect of fog elimination and water conservation.

[0053] Refer to Figure 1 and Figure 6 , the distance between the dehumidifier 8 and the first water distribution area 2 is 3 meters, and the space between the dehumidifier 8 and the first water distribution area 2 is the first mixing area 13; the distance between the first water distribution area 2 and the second water distribution area 3 is 2 meters, and the space between the first water distribution area 2 and the second water distribution area 3 is the second mixing area 14. The first mixing area 13 and the second mixing area 14 provide sufficient space for the full mixing of water and gas, so that the hot and humid gas and the dry and hot gas can be fully mixed, further reducing the overall humidity of the discharged gas and reducing the possibility of large local humidity of the discharged gas still causing water mist and water droplets.

[0054] The implementation principle of the natural draft cooling tower for fog elimination, water conservation and ice melting in the embodiment of the present utility model is as follows: in summer with high temperature weather, the electric valve 12 is closed, and the water sprayed by multiple first water distribution nozzles 21 and the upward dry cold air simultaneously perform "contact heat exchange" and "non-contact heat exchange" in the heat exchange module 4, so that the cooling tower achieves a better cooling effect, can adapt to the cooling circulating water work with a greater cooling demand in summer with high temperature weather, and will not produce a large amount of water mist when encountering cold air.

[0055] In autumn and winter with low temperature weather, the electric valve 12 is opened, and the water sprayed by multiple second water distribution nozzles 31 can enter the wet area channel 411 of the heat exchange module 4. Most of the dry cold air flows from bottom to top through the dry area channel 412, and the downward water droplets and the upward air perform "non-contact heat exchange" through the partition heat exchange device 42, so that the moisture content of the gas discharged from the cooling tower is significantly reduced, thereby significantly reducing the amount of water lost by evaporation and heat dissipation, and significantly enhancing the fog elimination effect.

[0056] The second water distribution area 3 is put into operation, and the cooling tower switches to the state of fog elimination and water conservation operation; in summer with high temperature weather, it switches to the first water distribution area 2 being put into operation, and the cooling tower has a good cooling effect to meet the production needs. Compared with the coil and the blower, the above structure does not need to increase the peripheral floor area of the natural draft cooling tower and does not increase the operating energy consumption of the cooling tower.

[0057] The above are all the preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited thereby. Therefore, all equivalent changes made according to the structure, shape and principle of the present utility model shall be covered within the protection scope of the present utility model.

Claims

1. A natural draft cooling tower for fog elimination, water conservation and ice melting, characterized in that: It includes a tower body (1), inside which there are arranged a first water distribution area (2), a second water distribution area (3) and a heat exchange module (4) from top to bottom. A plurality of first water distribution nozzles (21) are arranged in the first water distribution area (2), and a plurality of second water distribution nozzles (31) are arranged in the second water distribution area (3); the heat exchange module (4) is divided into a plurality of staggered wet area channels (411) and dry area channels (412), and a partition heat exchange device (42) is arranged between the wet area channels (411) and the dry area channels (412). The water spraying surfaces of the plurality of second water distribution nozzles (31) respectively face the upper entrances of the plurality of wet area channels (411).

2. The natural draft cooling tower for fog elimination, water conservation and ice melting according to claim 1, wherein: The second water distribution area (3) is sequentially arranged as a sparse area (5), a sub-dense area (6) and a dense area (7) from its center to the periphery, and the distribution density of the first water distribution nozzles (21) in the sparse area (5), the sub-dense area (6) and the dense area (7) gradually increases.

3. The natural draft cooling tower for fog elimination, water conservation and ice melting according to claim 2, characterized in that: A plurality of water distribution main pipes (32) are arranged in the second water distribution area (3) and are circumferentially and evenly distributed around the central axis of the tower body (1). The plurality of water distribution main pipes (32) are fixedly connected and communicate with a plurality of annular water distribution sub-pipes (33). The plurality of water distribution sub-pipes (33) are coaxial with the tower body (1) and are sequentially arranged at intervals away from the central axis of the tower body (1); the second water distribution nozzles (31) are connected and arranged on the water distribution sub-pipes (33), and the distribution intervals of the water distribution sub-pipes (33) in the sparse area (5), the sub-dense area (6) and the dense area (7) gradually decrease.

4. A natural draft cooling tower for fog elimination, water conservation, and ice melting according to any one of claims 1 or 2, characterized in that: The tower body (1) is provided with a water inlet pipe (11). The plurality of first water distribution nozzles (21) and the second water distribution nozzles (31) are both connected to the water inlet pipe (11). The connection port of the first water distribution nozzle (21) and the water inlet pipe (11) is located above the connection port of the second water distribution nozzle (31) and the water inlet pipe (11). An electric valve (12) is arranged on the connection path between the second water distribution nozzle (31) and the water inlet pipe (11).

5. A natural draft cooling tower for fog elimination, water conservation and ice melting according to any one of claims 1 or 2, characterized in that: The heat exchange module (4) includes a heat exchange filler plate (41) arranged below the second water distribution area (3). The partition heat exchange device (42) is embedded in the heat exchange filler plate (41), and the partition heat exchange device (42) divides the heat exchange filler plate (41) into a plurality of staggered wet area channels (411) and dry area channels (412).

6. A natural draft cooling tower for fog elimination, water conservation and ice melting according to any one of claims 1 or 2, characterized in that: A plurality of main water distribution troughs (22) and auxiliary water distribution troughs (23) are arranged in the first water distribution area (2) and are circumferentially and evenly distributed around the central axis of the tower body (1). The plurality of main water distribution troughs (22) and the auxiliary water distribution troughs (23) are fixedly connected and communicate with each other. The first water distribution nozzles (21) are evenly arranged and connected to the plurality of main water distribution troughs (22) and the auxiliary water distribution troughs (23).

7. A natural draft cooling tower for fog elimination, water conservation, and ice melting according to any one of claims 1 or 2, characterized in that: A dehumidifier (8) is arranged above the first water distribution area (2).

8. The natural draft cooling tower for fog elimination, water conservation and ice melting according to claim 7, characterized in that: The dehumidifier (8) includes a plurality of arc-shaped guide plates (81) arranged on the tower body (1). The arc-shaped cross-sections of the plurality of arc-shaped guide plates (81) are all vertically arranged, and the plurality of arc-shaped guide plates (81) are arranged at intervals in the horizontal direction.

9. The natural draft cooling tower for fog elimination, water conservation and ice melting according to claim 8, characterized in that: Dehumidifying claw pieces (82) are arranged at the convex surfaces of the arc-shaped guide plates (81).

10. A natural draft cooling tower for fog elimination, water conservation, and ice melting according to claim 7, characterized in that: The distance between the dehumidifier (8) and the first water distribution area (2) is 2-5 meters.

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