Cooling tower capable of preventing dissipation of white fog

Abstract

The utility model discloses a cooling tower capable of preventing dissipation of white fog, which belongs to the technical field of cooling towers and comprises a tower body, a water distribution pipe and a filler which are sequentially arranged in the tower body from top to bottom, an upper air inlet and a lower air inlet are respectively arranged on the side wall of the tower body and positioned on the upper side and the lower side of the filler, and a coil heat exchanger is mounted at the upper air inlet. The water inlet end of the coil heat exchanger is connected with the water inlet pipe, the water outlet end of the coil heat exchanger is connected with the water distribution pipe, a blocking cover is arranged at the air inlet, a containing cavity used for installing the coil heat exchanger is formed in the blocking cover, an air inlet hole is formed in the side wall, away from the tower body, of the blocking cover, and the cavity top wall of the containing cavity is obliquely arranged downwards from inside to outside. And the air inlet holes are inclined downwards from inside to outside. According to the cooling tower capable of preventing the rime fog from escaping, the inclination directions of the cavity top wall of the blocking cover and the air inlet holes are set, so that the rime fog is effectively prevented from escaping out of the tower.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling towers, in particular to a cooling tower capable of preventing white mist from escaping. Background Art

[0002] A cooling tower is a device that exchanges heat between circulating water carrying waste heat and rising cold air in the tower, and is used to cool the circulating water. A cooling tower generally includes a tower body, a water distribution system, and fillers. The fillers are arranged in the tower body, and the water distribution system includes a water distribution pipe arranged above the fillers. When in use, the circulating water enters the tower body through the water distribution pipe and sprays on the fillers, and then exchanges heat with the rising cold air entering the tower body through the bottom of the tower body, thereby reducing the temperature of the circulating water.

[0003] In order to further improve the cooling efficiency of circulating water, the publication number CN202470813U provides a defogging cooling tower, including a tower body and a water distributor and a packing layer arranged in the tower body in sequence, and a second air inlet is also arranged on the side wall of the upper part of the tower body, and a finned tube heat exchanger is also arranged outside the second air inlet, and the finned tube heat exchanger is provided with a water inlet pipe, and the outlet pipe of the finned tube heat exchanger is connected to the water distributor. During operation, the inlet water of the cooling tower first passes through the finned tube heat exchanger, and exchanges heat with the cold air outside. After the water temperature of the inlet water is reduced to a certain temperature, it is sprayed on the packing layer through the water distributor, and is fully contacted with the air entering the tower at the lower part, thereby further reducing the temperature of the circulating water. The above scheme is effective in reducing the temperature of the circulating water. However, in actual use, part of the saturated hot and humid air passing through the packing layer upwards will escape through the second air inlet, and the saturated hot and humid air escaping to the outside of the tower body will form "white fog" after being cooled, resulting in poor defogging effect of the overall cooling tower.

[0004] In view of the above problems, the inventors have improved the structure of the cooling tower to prevent the white mist from escaping to the outside of the tower body through the air inlet. Utility Model Content

[0005] The technical problem to be solved by the utility model is that in the prior art, "white mist" will escape from the air inlet of the cooling tower. Based on this, the utility model provides a cooling tower which can prevent the white mist from escaping.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a cooling tower capable of preventing white mist from escaping, comprising a tower body and a water distribution pipe and filler arranged in the tower body from top to bottom, an upper air inlet and a lower air inlet are respectively arranged on the side wall of the tower body at the upper and lower sides of the filler, a coil heat exchanger is installed at the upper air inlet, the water inlet end of the coil heat exchanger is connected to the water inlet pipe, and the water outlet end of the coil heat exchanger is connected to the water distribution pipe, a baffle is provided at the air inlet, a containing cavity for installing the coil heat exchanger is formed in the baffle, an air inlet hole is opened on the side wall of the baffle away from the tower body, the cavity top wall of the containing cavity is arranged downwardly inclined from the inside to the outside, and the air inlet hole is arranged downwardly inclined from the inside to the outside.

[0007] Furthermore, a water blocking strip is fixedly connected to the cavity top wall of the shield.

[0008] Furthermore, the cavity bottom wall of the baffle is arranged to be inclined upward from inside to outside.

[0009] Furthermore, the angle α between the cavity bottom wall and the horizontal plane is smaller than the angle β between the cavity top wall and the horizontal plane.

[0010] Furthermore, an induced draft fan is installed in the baffle, the induced draft fan is located on a side of the coil heat exchanger away from the tower body, and the induced draft fan is fixedly connected to the baffle, and the water blocking strip is located between the coil heat exchanger and the induced draft fan.

[0011] Furthermore, the coil heat exchanger is a wavy coil structure, and the plane where the coil heat exchanger is located is perpendicular to the extension direction of the air inlet hole.

[0012] Furthermore, a water collector is also provided in the tower body, and the water collector is located above the water distribution pipe, and the upper air inlet is located between the water collector and the filler.

[0013] Furthermore, the water collector is composed of a plurality of water collecting plates arranged in sequence, an air flow channel is formed between every two adjacent water collecting plates, and the cross-section of the water collecting plates is in a wave shape.

[0014] Furthermore, a wind tube is installed on the top of the tower body, a fan is installed in the wind tube, and a water collecting tank is arranged at the bottom of the tower body.

[0015] The beneficial effect of the utility model is as follows: the cooling tower capable of preventing white mist from escaping provided by the utility model is provided with a shield at the upper air inlet, and the cavity top wall of the shield is arranged in a state of tilting downward from the inside to the outside, which is beneficial to guiding the saturated hot and humid air into the tower body; at the same time, the air inlet holes on the shield are arranged in a state of tilting downward from the inside to the outside, which can effectively block the airflow from flowing through the air inlet holes to the outside of the shield, thereby effectively preventing the "white mist" from escaping to the outside of the tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of a cooling tower capable of preventing white mist from escaping according to the utility model;

[0018] Figure 2 yes Figure 1 A partial enlarged view of point A in the cooling tower that can prevent white mist from escaping is shown;

[0019] Figure 3 yes Figure 2 Schematic diagram of the structure of the center coil heat exchanger along direction B.

[0020] In the figure: 1, tower body, 11, upper air inlet, 12, lower air inlet, 13, wind duct, 14, fan, 2, water collector, 21, water collecting plate, 210, air flow channel, 3, water distribution pipe, 31, nozzle, 4, filler, 5, water collecting tank, 6, coil heat exchanger, 7, water inlet pipe, 8, baffle, 81, accommodating cavity, 82, air inlet hole, 811, cavity top wall, 812, cavity bottom wall, 83, water blocking strip, 84, induced draft fan. DETAILED DESCRIPTION

[0021] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.

[0022] See also Figure 1-Figure 3 The utility model provides a cooling tower capable of preventing white mist from escaping, comprising a tower body 1 and a water collector 2, a water distribution pipe 3 and a filler 4 which are sequentially arranged inside the tower body 1 from the upper right to the lower right, a water collecting pool 5 is arranged at the bottom of the tower body 1, an upper air inlet 11 and a lower air inlet 12 are sequentially arranged on the side wall of the tower body 1 from the upper to the lower, the upper air inlet 11 is located between the water collector 2 and the filler 4, the lower air inlet 12 is located below the filler 4, a coil heat exchanger 6 is installed at the upper air inlet 11, the water inlet end of the coil heat exchanger 6 is connected to the water inlet pipe 7, and the water outlet end of the coil heat exchanger 6 is connected to the water distribution pipe 3.

[0023] When in use, the circulating water enters the coil heat exchanger 6 through the water inlet pipe 7, and then is sprayed onto the filler 4 through the nozzle 31 on the water distribution pipe 3. At the same time, the external dry cold air passes through the coil heat exchanger 6 through the upper air inlet 11 and enters the tower body 1. In this process, the dry cold air will exchange heat with the hot circulating water in the coil heat exchanger 6, thereby initially cooling the circulating water. The external dry cold air will also enter the tower body 1 through the lower air inlet 12 at the bottom, and will contact the water that passes through the filler 4 downward during the rising process in the tower body 1 to exchange heat, thereby cooling the circulating water again. When the saturated hot and humid air formed by the rising dry cold air contacting the water enters the water collector 2, part of the water vapor in the hot and humid air will adhere to the water collector 2, thereby realizing the interception of water vapor, making the gas out of the tower unsaturated hot and humid air. In this way, no "white fog" will be formed after leaving the tower, saving water resources while protecting the surrounding environment.

[0024] A wind tube 13 is installed on the top of the tower body 1, and a fan 14 is installed in the wind tube 13. When working, the fan 14 is started to make the air flow inside the tower body 1 flow upward, so that the external dry and cold air can enter the tower body 1 through the upper air inlet 11 and the lower air inlet 12.

[0025] A shield 8 is installed on the side wall of the tower body 1 at the upper air inlet 11, and a receiving cavity 81 for installing the coil heat exchanger 6 is formed in the shield 8. One end of the water inlet pipe 7 passes through the shield 8 and is connected to the coil heat exchanger 6. An air inlet hole 82 is opened on the side wall of the shield 8 away from the tower body 1, and the air inlet hole 82 is connected to the receiving cavity 81 and the external atmosphere. When working, the external dry cold air enters the receiving cavity 81 through the air inlet hole 82 under the action of the fan 14, and then passes through the coil heat exchanger 6 and enters the inside of the tower body 1.

[0026] As a preferred embodiment, the cavity top wall 811 of the accommodating cavity 81 is set to be inclined downward from the inside to the outside, and the air inlet hole 82 is set to be inclined downward from the inside to the outside. During operation, when part of the saturated hot and humid air that passes through the filler 4 upward enters the shield 8 outside the upper air inlet 11, under the action of the cavity top wall 811 that is inclined from the inside to the outside, this part of the saturated hot and humid air can continue to flow upward along the inclined surface, and finally enter the water collector 2, effectively preventing the "white fog" phenomenon generated after the saturated hot and humid air flows out to the outside of the shield 8 through the air inlet hole 82. At the same time, according to the principle of hot air rising, the saturated hot and humid air entering the accommodating cavity 81 will automatically flow upward, and the extension direction of the air inlet hole 82 located on the outside of the shield 8 is inclined downward from the inside to the outside, which makes it difficult for the saturated hot and humid air to enter the air inlet hole 82 easily, thereby effectively preventing the saturated hot and humid air from escaping to the outside of the shield 8 through the air inlet hole 82.

[0027] As a preferred embodiment, a water blocking strip 83 is fixedly connected to the cavity top wall 811 of the shield 8, and the contact surface between the water blocking strip 83 and the cavity top wall 811 is sealed. During use, the water vapor attached to the cavity top wall 811 accumulates into water droplets and flows downward along the cavity top wall 811. When flowing to the position of the water blocking strip 83, the water blocking strip 83 can prevent the water flow from continuing to flow, thereby causing the water droplets to fall from the bottom of the water blocking strip 83, effectively preventing the water droplets from contacting the air inlet 82.

[0028] Furthermore, the cavity bottom wall 812 of the shield 8 is arranged upwardly and tilted from the inside to the outside, and when water drops dripping from the cavity top wall 811 fall onto the cavity bottom wall 812, the inclined cavity bottom wall 812 can guide the water drops to the inside of the tower body 1, thereby preventing the water drops from accumulating in the shield 8. Furthermore, the angle α between the cavity bottom wall 812 and the horizontal plane is smaller than the angle β between the cavity top wall 811 and the horizontal plane.

[0029] As a preferred embodiment, an induced draft fan 84 is installed in the shield 8, and the induced draft fan 84 is located on the side of the coil heat exchanger 6 away from the tower body 1, and the induced draft fan 84 is fixedly connected to the outer wall of the shield 8, and the water blocking strip 83 is located between the coil heat exchanger 6 and the induced draft fan 84. When the induced draft fan 84 is started, dry and cold air outside the tower can be forced to be sent into the shield 8 through the air inlet 82, thereby increasing the amount of air entering the tower.

[0030] Furthermore, the coil heat exchanger 6 is a wavy coil structure, and the gap between each two adjacent coils on the coil heat exchanger 6 can be used for airflow to pass through, and the plane where the coil heat exchanger 6 is located is perpendicular to the extension direction of the air inlet hole 82. In this way, the dry cold air blown into the shield 8 through the air inlet hole 82 can be blown directly to the plane where the coil heat exchanger 6 is located, thereby improving the heat exchange efficiency.

[0031] When in use, the external dry and cold air passing through the baffle 8 via the air inlet hole 82 will mix with the saturated humid and hot air rising in the tower, so that the air flow temperature is reduced and its water content is reduced. Therefore, when the rising air flow enters the water collector 2, some small water droplets will adhere to the water collector 2, thereby intercepting the water vapor in the rising air flow, thereby reducing the loss of water.

[0032] As a preferred embodiment, the water collector 2 is composed of a plurality of water collector sheets 21 arranged vertically in sequence, and an airflow channel 210 is formed between each two adjacent water collector sheets 21 to allow airflow to pass upward through the water collector 2. At the same time, the cross-section of the water collector sheet 21 is wavy in shape, which is used to increase the contact time between the water collector sheet 21 and the rising airflow, thereby more effectively intercepting water vapor.

[0033] The utility model provides a cooling tower capable of preventing white mist from escaping, wherein a shield 8 is arranged at the upper air inlet 11, and the cavity top wall 811 of the shield 8 is arranged to be tilted downward from the inside to the outside, which is beneficial for guiding the saturated hot and humid air into the tower body 1. At the same time, the air inlet holes 82 on the shield 8 are arranged to be tilted downward from the inside to the outside, which can effectively block the airflow from flowing to the outside of the shield 8 through the air inlet holes 82, thereby effectively preventing the "white mist" from escaping to the outside of the tower.

[0034] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the scope of the utility model through the above description. The technical scope of this utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A cooling tower capable of preventing white mist from escaping, comprising a tower body and a water distribution pipe and a filler arranged in the tower body from top to bottom, wherein an upper air inlet and a lower air inlet are respectively arranged on the side wall of the tower body at the upper and lower sides of the filler, and characterized in that: A coil heat exchanger is installed at the upper air inlet, the water inlet end of the coil heat exchanger is connected to the water inlet pipe, and the water outlet end of the coil heat exchanger is connected to the water distribution pipe. A baffle is provided at the air inlet, and a accommodating cavity for installing the coil heat exchanger is formed in the baffle. An air inlet hole is opened on the side wall of the baffle away from the tower body, the top wall of the accommodating cavity is arranged to be inclined downward from the inside to the outside, and the air inlet hole is arranged to be inclined downward from the inside to the outside.

2. The cooling tower capable of preventing white mist from escaping as claimed in claim 1, characterized in that: A water blocking strip is fixedly connected to the cavity top wall of the baffle.

3. The cooling tower capable of preventing white mist from escaping as claimed in claim 2, characterized in that: The cavity bottom wall of the baffle is arranged to be inclined upward from inside to outside.

4. The cooling tower capable of preventing white mist from escaping as claimed in claim 3, characterized in that: The angle α between the cavity bottom wall and the horizontal plane is smaller than the angle β between the cavity top wall and the horizontal plane.

5. The cooling tower capable of preventing white mist from escaping as claimed in claim 2, characterized in that: An induced draft fan is installed in the baffle, the induced draft fan is located at a side of the coil heat exchanger away from the tower body, and the induced draft fan is fixedly connected to the baffle, and the water blocking strip is located between the coil heat exchanger and the induced draft fan.

6. The cooling tower capable of preventing white mist from escaping as claimed in claim 1, characterized in that: The coil heat exchanger is a wavy coil structure, and the plane where the coil heat exchanger is located is perpendicular to the extension direction of the air inlet hole.

7. The cooling tower capable of preventing white mist from escaping as claimed in claim 1, characterized in that: A water collector is also provided in the tower body. The water collector is located above the water distribution pipe, and the upper air inlet is located between the water collector and the filler.

8. The cooling tower capable of preventing white mist from escaping as claimed in claim 7, characterized in that: The water collector is composed of a plurality of water collecting plates arranged in sequence, an air flow channel is formed between every two adjacent water collecting plates, and the cross-section of the water collecting plates is in a wave shape.

9. The cooling tower capable of preventing white mist from escaping as claimed in claim 1, characterized in that: A wind tube is installed on the top of the tower body, a fan is installed in the wind tube, and a water collecting pool is arranged at the bottom of the tower body.

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