Fog dissipation type cooling tower system

Abstract

The utility model relates to a fog dispersal type cooling tower system. Comprising a cooling tower body, the top of the cooling tower body is provided with an air duct with an axial flow fan, the bottom of the cooling tower body is provided with a cooling water pool, the middle-upper part of the cooling tower body is provided with a circulating water spraying pipeline with a circulating water spraying nozzle, the upper part of the circulating water spraying nozzle is provided with a demister, and the lower part of the circulating water spraying nozzle is provided with a water spraying filler. A dry and wet air mixing part capable of mixing external air with rising wet air in the cooling tower body is arranged on the cooling tower body between the demister and the air duct; the dry and wet air mixing part comprises a ventilation hole formed in the side wall of the cooling tower body, and a heating device for ventilation air is arranged on the outer wall, corresponding to the ventilation hole, of the cooling tower body; by mixing the dry and hot air with the wet and hot air of the cooling tower, the dew point and the moisture content of the original saturated air are reduced, and the original saturated air becomes unsaturated air, so that the characteristic of eliminating white fog is achieved on the premise of not influencing the normal operation of the cooling tower.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling towers, in particular to a mist elimination type cooling tower system. Background Art

[0002] A cooling tower is a device that absorbs heat from a system and releases it to the atmosphere to lower the water temperature. It utilizes the exchange of heat between water and air to generate steam. This steam evaporates and removes heat, achieving evaporative heat dissipation through convective, convective, and radiative heat transfer. This evaporative heat dissipation system dissipates excess heat generated in industrial applications such as refrigeration and air conditioning, thereby lowering the water temperature and ensuring proper operation. The device is typically barrel-shaped, hence the name cooling tower. It is widely used in industries such as metallurgy, petroleum, chemical engineering, power generation, textiles, synthetic ammonia, and fertilizer. These industries require extensive cooling water systems, but open countercurrent mechanical draft cooling towers are currently the most common type. The humid, hot air evaporated from this type of cooling tower is carried by a fan to the atmosphere outside the exhaust duct. When the ambient temperature drops below 5°C, the humid, hot air mixes with the dry, hot air in the atmosphere, forming a white mist, also known as a plume. This plume is the visible water vapor from the saturated airflow leaving the exhaust cooling tower. This plume not only wastes water resources through evaporation, but also creates a cloud of mist that shrouds the surrounding area, polluting the surrounding environment. In order to solve the above technical problems, some companies install a large number of water collecting and demisting devices (such as wire mesh demisters, etc.) in the cooling tower. When the number of water collecting and demisting devices is small, the preset effect cannot be achieved; when the number is large, it affects the discharge of hot and humid air, and in serious cases affects the normal operation of the entire cooling tower. Utility Model Content

[0003] The purpose of the utility model is to provide a mist elimination type cooling tower system to solve the technical problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mist-eliminating cooling tower system, comprising a cooling tower body, a wind duct with an axial flow fan is provided on the top of the cooling tower body, a cooling water pool is provided at the bottom of the cooling tower body, a circulating water spray pipe with a circulating water spray nozzle is provided in the upper middle part of the cooling tower body, a demister is provided on the upper part of the circulating water spray nozzle, and a water filling is provided on the lower part of the circulating water spray nozzle. A dry-wet air mixing section capable of mixing outside air with rising wet air inside the cooling tower body is provided on the cooling tower body between the demister and the wind duct; the dry-wet air mixing section comprises ventilation holes opened on the side wall of the cooling tower body, and a heating device for ventilation air is provided on the outer wall of the cooling tower body corresponding to the ventilation holes.

[0005] The beneficial effects of the present invention are as follows: the present invention can introduce outside air and mix it in the upper part of the cooling tower by setting ventilation holes, and at the same time use the ventilation air heating device to dry and heat the air entering the cooling tower from the outside, while reducing its water content, and realize mixing of dry hot air with the humid hot air of the cooling tower, so that the dew point and moisture content of the original saturated air are reduced, and it becomes unsaturated air, thereby achieving the characteristic of eliminating white mist without affecting the normal operation of the cooling tower.

[0006] Preferably, there are a plurality of ventilation holes, which are evenly distributed on the side wall of the cooling tower body, and the ventilation air heating devices are in a one-to-one correspondence with the ventilation holes.

[0007] Preferably, the heating device for ventilation air is one of an electric heater, a heat exchanger, a coal heater or an oil heater.

[0008] Preferably, when the ventilation air heating device is a heat exchanger, the heat exchangers are connected in series or in parallel.

[0009] Preferably, the heat exchanger is a finned heat exchanger. When the finned heat exchangers are connected in series, the pipes of the series-connected finned heat exchangers are arranged inside the cooling tower body.

[0010] Preferably, the inlet end of the heat exchanger is connected to the synthetic ammonia condensate pipeline or the low-grade waste heat pipeline, and the outlet end of the heat exchanger is connected to the drainage storage tank.

[0011] Preferably, the dry-wet air mixing part further comprises an air mixer arranged inside the cooling tower body, and the air mixer comprises a crossbeam and a baffle arranged on the crossbeam.

[0012] Preferably, there are at least two cross beams, both ends of which are connected to the inner wall of the cooling tower body respectively, and the two cross beams are respectively arranged near the middle of the cooling tower body; the two sides of the baffle are gas communication channels respectively; the baffle is V-shaped or W-shaped.

[0013] Preferably, a lower air inlet is provided on the cooling tower body above the cooling water pool, and a shutter capable of adjusting the air intake volume is provided on the lower air inlet.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The utility model can be applied to newly built cooling towers or to the transformation of old cooling towers. It can achieve the purpose of eliminating white mist without damaging the operation of the original related equipment. It has the characteristics of adaptability and easy transformation.

[0016] 2. The utility model can introduce outside air and mix it in the upper part of the cooling tower by setting ventilation holes. At the same time, the ventilation air heating device is used to dry and heat the air entering the cooling tower from the outside, thereby reducing its water content and mixing the dry hot air with the humid hot air from the cooling tower. As a result, the dew point and moisture content of the original saturated air are reduced, and it becomes unsaturated air, thereby achieving the characteristic of eliminating white mist without affecting the normal operation of the cooling tower.

[0017] 3. The heat exchanger in the present invention can utilize the synthetic ammonia condensate in the synthetic ammonia condensate pipeline or the low-grade waste heat in the low-grade waste heat pipeline to achieve the reuse of waste heat, thereby achieving the characteristics of energy saving and consumption reduction.

[0018] 4. In the present invention, an air mixer is provided to form turbulent flow of the aforementioned hot and dry air and hot and humid air, thereby preventing the hot and humid air from escaping quickly and achieving sufficient mixing of the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 This is a schematic diagram of the positional relationship between the cooling tower body and the baffles of the present utility model.

[0021] Figure 3 This is a schematic diagram of the parallel connection of the finned heat exchanger of the utility model.

[0022] Figure 4 This is a schematic diagram of the series connection of the finned heat exchanger of the utility model.

[0023] In the figure: 1. Cooling tower body; 2. Axial flow fan; 3. Air duct; 4. Cooling water tank; 5. Circulating water spray nozzle; 6. Circulating water spray pipe; 7. Demister; 8. Water spray filler; 9. Ventilation hole; 10. Finned heat exchanger; 11. Synthetic ammonia condensate pipe or low-grade waste heat pipe; 12. Drainage storage tank; 13. Beam; 14. Baffle; 15. Gas communication channel; 16. Shutter. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1The utility model provides a technical solution: a mist-eliminating cooling tower system, comprising a cooling tower body 1, a wind tube 3 with an axial flow fan 2 being provided on the top of the cooling tower body 1, a cooling water pool 4 being provided at the bottom of the cooling tower body 1, a circulating water spray pipe 6 with a circulating water spray nozzle 5 being provided at the upper middle part of the cooling tower body 1, a demister 7 being provided at the upper part of the circulating water spray nozzle 5, a water spray filler 8 being provided at the lower part of the circulating water spray nozzle 5, a dry-wet air mixing section being provided on the cooling tower body 1 between the demister 7 and the wind tube 3, which can mix the outside air with the rising wet air inside the cooling tower body 1; the dry-wet air mixing section comprising ventilation holes 9 opened on the side wall of the cooling tower body 1, and a heating device for ventilation air being provided on the outer wall of the cooling tower body 1 corresponding to the ventilation holes 9. The present invention can be applied to newly built cooling towers as well as old cooling towers; its structural setting itself does not affect the operation of the original equipment; the present invention utilizes the dry hot air from the outside to mix with the moist hot air in the cooling tower body 1, and in the mixing process the dew point and moisture content of the original saturated air can be reduced to become unsaturated air, thereby achieving the purpose of eliminating white mist; the purpose of the ventilation air heating device described in the present invention is not only to increase the temperature of the air entering the cooling tower body 1, but also to reduce the humidity of the outside air; thereby achieving the technical effect of eliminating white mist.

[0026] Furthermore, the ventilation holes 9 are multiple and evenly distributed on the side wall of the cooling tower body 1, and the ventilation air heating device is in a one-to-one correspondence with the ventilation holes 9. The ventilation holes 9 described in the present invention are multiple and evenly distributed on the side wall of the cooling tower body 1 to achieve a good mixing effect. Furthermore, a ventilation air heating device is provided in front of each ventilation hole 9, thereby ensuring that the air entering the cooling tower body 1 is dry and has a high temperature.

[0027] Furthermore, the ventilation air heating device is one of an electric heater, a heat exchanger, a coal heater, or an oil heater. The ventilation air heating device described in the utility model can be connected to the outer wall of the cooling tower body 1 by conventional fixings, thereby ensuring that it is installed at the ventilation hole 9; the heating method can be conventional heating methods, including electric heating, coal heating, fuel oil heating, or steam heat exchange.

[0028] Further, see Figure 1 、 3 4. When the ventilation air heating device is a heat exchanger, the heat exchangers are connected in series or in parallel. When using a heat exchanger, steam heat exchange or thermal oil heat exchange can be used, and the heat exchangers can be connected in parallel or in series to save on piping layout and reduce costs.

[0029] Further, see Figure 1The heat exchanger is a finned heat exchanger 10. When the finned heat exchangers 10 are connected in series, the pipes of the series-connected finned heat exchangers 10 are arranged inside the cooling tower body 1. When the finned heat exchangers 10 are connected in series, the pipes between the series-connected finned heat exchangers 10 are arranged inside the cooling tower body 1, which can achieve heating of the interior of the cooling tower body 1 without affecting the operation of the cooling tower.

[0030] Furthermore, the inlet of the heat exchanger is connected to the synthetic ammonia condensate pipeline or the low-grade waste heat pipeline 11, and the outlet of the heat exchanger is connected to the drainage storage tank 12. The heat exchanger described in the present invention can also utilize waste heat to achieve the characteristics of cost reduction and energy saving.

[0031] Further, see Figure 1 The dry and wet air mixing unit further includes an air mixer disposed inside the cooling tower body 1, and the air mixer includes a crossbeam 13 and a baffle 14 disposed on the crossbeam 13. The utility model can form turbulent flow of dry hot air and humid hot air by disposing the baffle 14, thereby preventing the humid hot air from escaping quickly and achieving sufficient mixing of the two.

[0032] Further, see Figure 1 、 2 There are at least two crossbeams 13, each connected to the inner wall of the cooling tower body 1 at both ends. The two crossbeams 13 are located near the middle of the cooling tower body 1. The baffles 14 are V-shaped or W-shaped, with gas communication channels 15 on either side. This arrangement ensures that dry hot air and moist hot air are fully mixed without affecting the normal operation of the cooling tower.

[0033] Further, see Figure 1 A lower air inlet is provided on the cooling tower body 1 above the cooling water pool 4, and a shutter 16 for adjusting the air intake volume is provided on the lower air inlet.

[0034] The working principle of the utility model is as follows: during the operation of the cooling tower, the circulating water in the circulating water spray pipe 6 enters the interior of the cooling tower body 1 through the circulating water spray nozzle 5, and descends under the action of its own gravity, and contacts and exchanges heat with the air in the lower air inlet in countercurrent; the circulating water after heat exchange enters the cooling water pool 4, and the humid hot air after heat exchange ascends through the demister 7 and enters the lower part of the air mixer. The outside air is heated by the ventilation air heating device under the action of the axial flow fan 2 and enters the lower part of the air mixer through the ventilation hole 9. The humid hot air of the cooling tower body 1 The air and the hot and dry air from the ventilation holes 9 are fully mixed. During the mixing process, the dew point and moisture content of the original saturated air can be reduced to become unsaturated air. The unsaturated air is discharged outside the axial flow fan 2 through the gas connecting channel 15. The above process can condense the original hot and humid air by 15%, which can improve the water-saving efficiency. Taking a 5000t / h open countercurrent mechanical ventilation cooling tower as an example, after implementing the above transformation, 15% of the evaporated water can be saved and the sewage discharge can be reduced by 5%, which saves a total of 59,250 tons of water each year.

[0035] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A mist-eliminating cooling tower system, comprising a cooling tower body (1), a wind tube (3) with an axial flow fan (2) provided at the top of the cooling tower body (1), a cooling water pool (4) provided at the bottom of the cooling tower body (1), a circulating water spray pipe (6) with a circulating water spray nozzle (5) provided at the upper middle portion of the cooling tower body (1), a demister (7) provided at the upper portion of the circulating water spray nozzle (5), and a water spray filler (8) provided at the lower portion of the circulating water spray nozzle (5), characterized in that: A dry-wet air mixing portion capable of mixing external air with rising wet air inside the cooling tower body (1) is provided on the cooling tower body (1) between the demister (7) and the wind tube (3); The dry-wet air mixing section comprises ventilation holes (9) provided on the side wall of the cooling tower body (1); a heating device for ventilation air is provided on the outer wall of the cooling tower body (1) corresponding to the ventilation holes (9).

2. A mist elimination type cooling tower system according to claim 1, characterized in that: There are a plurality of ventilation holes (9) uniformly distributed on the side wall of the cooling tower body (1), and the ventilation air heating devices and the ventilation holes (9) are in a one-to-one correspondence.

3. A mist elimination type cooling tower system according to claim 1, characterized in that: The heating device for ventilation air is one of an electric heater, a heat exchanger, a coal heater or an oil heater.

4. A mist elimination type cooling tower system according to claim 3, characterized in that: When the ventilation air heating device is a heat exchanger, the heat exchangers are connected in series or in parallel.

5. A mist elimination type cooling tower system according to claim 4, characterized in that: The heat exchanger is a fin-type heat exchanger (10). When the fin-type heat exchangers (10) are connected in series, the pipes of the series-connected fin-type heat exchangers (10) are arranged inside the cooling tower body (1).

6. A mist elimination type cooling tower system according to claim 5, characterized in that: The inlet end of the heat exchanger is connected to the synthetic ammonia condensate pipeline or the low-grade waste heat pipeline (11), and the outlet end of the heat exchanger is connected to the drainage storage tank (12).

7. The mist elimination type cooling tower system according to claim 1, characterized in that: The dry-wet air mixing section further comprises an air mixer arranged inside the cooling tower body (1), and the air mixer comprises a crossbeam (13) and a baffle (14) arranged on the crossbeam (13).

8. The mist elimination type cooling tower system according to claim 7, characterized in that: There are at least two crossbeams (13), both ends of which are connected to the inner wall of the cooling tower body (1), and the two crossbeams (13) are respectively arranged near the middle of the cooling tower body (1); both sides of the baffle (14) are gas communication channels (15); and the baffle (14) is V-shaped or W-shaped.

9. A mist elimination type cooling tower system according to any one of claims 1 to 8, characterized in that: A lower air inlet is provided on the cooling tower body (1) above the cooling water pool (4), and a shutter (16) capable of adjusting the air intake volume is provided on the lower air inlet.

Images