High efficiency cooling tower based on zoned water collection

Abstract

The application relates to the technical field of cooling towers, in particular to a high-efficiency cooling tower based on partitioned water collection, which comprises a tower body, a wind cylinder is arranged at the top of the tower body, a fan and a first water collection assembly are sequentially arranged in the wind cylinder along the air flow direction, a spraying assembly, a second water collection assembly and a filler assembly are sequentially arranged in the tower body from top to bottom; the first water collection assembly is used for collecting high-temperature liquid drops brought by air from the spraying assembly, after the high-temperature liquid drops are collected, the high-temperature liquid drops are re-entered into the spraying assembly and sprayed out, the second water collection assembly is used for collecting heat exchange liquid drops brought by air from the filler assembly, the partitioned water collection is realized, water resources are saved, and the heat exchange effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cooling towers, and particularly relates to a high-efficiency cooling tower based on partitioned water collection. BACKGROUND

[0002] Air operation of the cooling tower mainly relies on rotation of the top fan to make air in the cooling tower flow out of the cooling tower from the air duct, so as to form a negative pressure in the cooling tower, so that air outside the cooling tower can enter the cooling tower through the louvers.

[0003] The common water collection assembly of the cooling tower is arranged between the spray assembly and the fan, part of the water droplets sprayed in the spray assembly are clamped in the rising air and move outward, the water collection assembly collects the part of the liquid droplets and gathers to form large liquid droplets and then directly enters the filler for heat exchange, however, the large liquid droplets gathered have a large radius and poor heat exchange effect; and when air and water sprayed by the spray assembly are heat exchanged in the filler assembly, some small liquid droplets in the filler will be clamped in the rising air and flow upward with the air when the ventilation volume of the cooling tower is large, and the liquid droplets have a certain cooling effect after heat exchange in the filler, and the current cooling tower does not have a water collection assembly for separately collecting the part of the liquid droplets. SUMMARY

[0004] The technical problem to be solved by the present application is that the water collection assembly in the prior art can only collect high-temperature liquid droplets carried by air from the spray assembly, and does not have a water collection assembly for separately collecting liquid droplets having a certain cooling effect after heat exchange in the filler.

[0005] To solve the above technical problems, the present application adopts the following technical scheme: a high-efficiency cooling tower based on partitioned water collection, comprising a tower body, a wind duct is arranged at the top of the tower body, a fan and a first water collection assembly are arranged in the wind duct in sequence along the air flow direction, a spray assembly, a second water collection assembly and a filler assembly are arranged in the tower body in sequence from top to bottom.

[0006] The first water collecting assembly is used to collect high-temperature liquid drops mixed in the rising air and not exchanged by the filler assembly, which are sprayed by the spraying assembly, and the high-temperature liquid drops re-enter the spraying assembly. The part of high-temperature liquid drops collected by the conventional cooling tower water collector also continuously gather into large liquid drops under the action of surface tension, and after becoming large liquid drops, the liquid drops drop into the lower filler for heat exchange under the action of gravity, but the liquid drop radius of these liquid drops is large compared with the liquid drops sprayed by the spraying assembly, so the air-liquid contact area is small, the heat exchange effect is poor, and in addition, the water distribution range of these liquid drops is also small compared with the liquid drops sprayed by the spraying assembly. Therefore, for the optimization of the thermal performance of the cooling tower, the thermal performance of the liquid drops collected by the water collecting assembly is much poorer than that of the liquid drops sprayed by the spraying assembly, so the first water collecting assembly in the application recovers the high-temperature liquid drops and re-enters the circulation process of the cooling tower, so that the high-temperature liquid drops are sprayed from the nozzle again, thereby achieving better thermal performance.

[0007] The second water collecting assembly is used to collect heat exchange liquid drops mixed in the rising air after heat exchange by the filler assembly. Since the part of liquid drops has been heat exchanged with the filler, the liquid drops are cooled. Collecting the part of liquid drops not only achieves the effect of saving water, but also avoids the loss of cold energy.

[0008] The above technical solution uses the first water collecting assembly to collect high-temperature liquid drops carried by the air from the spraying assembly, and makes the high-temperature liquid drops re-enter the spraying assembly to be sprayed, and the second water collecting assembly collects heat exchange liquid drops carried by the air from the filler assembly, thereby realizing zoned water collection, saving water resources and improving the heat exchange effect.

[0009] Further, the first water collecting assembly includes a plurality of water collecting units distributed vertically, and the water collecting unit includes a water collecting circular groove, an air deflector and a water collecting plate distributed from top to bottom. The plurality of water collecting units divide the fluid passage into multiple, and since the vertical height of the single fluid passage is reduced, the flow resistance of the air bypassing the air deflector is reduced.

[0010] The air deflector is welded on the side wall of the air duct, and the spacing between the water collecting plate and the air deflector is much smaller than the spacing between the water collecting circular groove and the air deflector. The small spacing between the water collecting plate and the air deflector is mainly for the collected liquid drops to pass through. Since the spacing between the water collecting plate and the air deflector is very small, most of the air will flow upwards to bypass the air deflector and pass through the space between the water collecting circular groove and the air deflector, so that the liquid drops carried out from the space between the air deflector and the water collecting plate by the air are very few. The water collecting plate gradually inclines upwards along the air flow direction, the water collecting circular groove of the lower water collecting unit in the adjacent two water collecting units is located on the bottom surface of the water collecting plate of the upper water collecting unit, and the water collecting plate in the lowermost water collecting unit is provided with a water outlet hole in the rear along the air flow direction.

[0011] Air is brought to the first water collecting assembly by the fan, in the process of air going around, due to the inertia of the liquid drops, air will bypass the air deflector and continue to flow forward, while the liquid drops will be thrown into the water collecting circular groove, the liquid drops will be caught by the wall in the water collecting circular groove to form liquid film, small liquid drops adhering to the water collecting circular groove will continuously aggregate to form large liquid drops due to the surface tension, the large liquid drops will finally flow into the lower water collecting plate along the wall of the water collecting circular groove under the action of gravity, the water collecting plate is arranged obliquely, so the liquid drops falling into the water collecting plate will flow downward, and finally flow out from the water outlet.

[0012] Further, the second water collecting assembly comprises two turbulence water collecting plates, each of which comprises a base plate, a plurality of through grooves are arranged on each base plate in a spaced manner, an upper convex arc-shaped upper bending plate is arranged above each through groove, and a lower convex arc-shaped lower bending plate is arranged below each through groove, the upper bending plate and the lower bending plate are respectively bent from the opposite two groove walls of the through groove towards each other, and the tail portions of the upper bending plate and the lower bending plate are respectively provided with gaps with the base plate, the two turbulence water collecting plates are respectively a left turbulence water collecting plate and a right turbulence water collecting plate, the lower bending plates on the left turbulence water collecting plate are all bent downward from right to left, and the lower bending plates on the right turbulence water collecting plate are all bent downward from left to right.

[0013] Since the density of water is much greater than that of air, when the air mixed with liquid drops flows upward from the lower part of the turbulence water collecting plate, the air first enters the gap between the lower bending plate and the base plate, then passes through the through groove, and finally flows out from the gap between the upper bending plate and the base plate, due to the large inertia of water, most of the liquid drops will collide on the upper bending plate and the lower bending plate to form liquid film, due to the surface tension of the liquid drops, small liquid drops will continuously aggregate to form large liquid drops, and the large liquid drops will finally fall downward into the water collecting pool under the action of gravity.

[0014] Further, the fan comprises a main fan and an auxiliary fan, the air duct comprises a ventilation section for mounting the main fan, an arc-shaped section for mounting the auxiliary fan, and a water collecting section for mounting the first water collecting assembly, the main fan discharges the air in the tower body upward, the auxiliary fan is located at the middle part of the arc-shaped section, the air deflection angle of the auxiliary fan makes the air turn, so that the flow direction of the air is consistent with the inclination direction of the water collecting plate, thereby ensuring that the air entering the cooling tower can flow out of the cooling tower as soon as possible, so as to ensure the ventilation performance of the whole tower.

[0015] Further, the tail portion of the upper bending plate is bent downward to form a blocking edge to block the liquid drops in the air.

[0016] Further, the front end of the water collecting plate in the air flow direction is provided with a baffle to prevent the liquid drops mixed in the air passing between the water collecting plate and the air deflector.

[0017] Further, the two substrates are provided with connecting rods, the connecting rods are provided with through holes from top to bottom, and the two substrates gradually move away from top to bottom, the water sprayed by the spraying assembly flows into the filler along the inclined substrate, the through groove on the substrate and the through hole on the connecting rod.

[0018] Further, the water collecting circular groove wall extends downwardly with a guide section, the guide section gradually bends in the direction opposite to the air flow direction, each water collecting circular groove has two guide sections, the guide section located at the rear end along the air flow direction is beneficial to the air entering the water collecting circular groove and colliding with the water collecting circular groove to form a liquid film, and the guide section at the front end is beneficial to the small liquid drops in the water collecting circular groove gathering to form large liquid drops and falling on the water collecting plate.

[0019] The present application has the advantages that: the first water collecting assembly is used for collecting the high-temperature liquid drops brought by the air from the spraying assembly, the high-temperature liquid drops are collected, and then the high-temperature liquid drops are sprayed out of the spraying assembly again, the second water collecting assembly is used for collecting the heat exchange liquid drops brought by the air from the filler assembly, the water is collected in different areas, the water resource is saved, and the heat exchange effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application is further described below in combination with the drawings and embodiments.

[0021] Figure 1 It is a structural schematic view of the present application;

[0022] Figure 2 It is a sectional view of the present application;

[0023] Figure 3 It is a perspective view of the first water collecting assembly;

[0024] Figure 4 It is a front view of the first water collecting assembly;

[0025] Figure 5 It is Figure 4 It is a local enlarged view of A part in the middle;

[0026] Figure 6 It is a perspective view of the second water collecting assembly;

[0027] Figure 7 It is a front view of the second water collecting assembly;

[0028] In the drawings:

[0029] 1. Tower body; 2. Air duct; 201. Ventilation section; 202. Arc-shaped section; 2021. Mounting hole; 203. Water collection section; 3. Main fan; 4. Auxiliary fan; 5. First water collection assembly; 501. Water collection trough; 5011. Guide section; 502. Air guide plate; 503. Water collection plate; 504. Water outlet; 505. Baffle; 6. Spray assembly; 7. Second water collection assembly; 701. Base plate; 7011. Through groove; 702. Upper bending plate; 7021. Edge retainer; 703. Lower bending plate; 704. Notch; 705. Connecting rod; 7051. Through hole; 8. Packing assembly; 9. Louver; Detailed Implementation

[0030] The invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention in a schematic manner. Therefore, they only show the components relevant to the invention, and directions and references, such as up, down, left, right, etc., are only used to aid in the description of the features in the drawings. Therefore, the following specific embodiments are not intended to be restrictive, and the scope of the claimed subject matter is defined solely by the appended claims and their equivalents.

[0031] Example 1:

[0032] like Figures 1-7 As shown, this invention is a high-efficiency cooling tower based on zoned water collection, including a tower body 1. The top of the tower body 1 is provided with a wind duct 2. Inside the wind duct 2, along the air flow direction, a main flow fan 3, an auxiliary flow fan 4, and a first water collection component 5 are arranged sequentially. The wind duct 2 includes a ventilation section 201 for installing the main flow fan 3, an arc-shaped section 202 for installing the auxiliary flow fan 4, and a water collection section 203 for installing the first water collection component 5. The ventilation section 201 extends vertically and has a relatively short extension length. The water collection section 203 extends approximately horizontally. The arc-shaped section 202 connects the ventilation section 201 and the water collection section 203, and has an installation hole 2021 for installing the auxiliary flow fan 4 in its middle part. The main flow fan 3 discharges the air inside the tower body 1 upwards. The auxiliary flow fan 4 is located in the middle part of the arc-shaped section 202. The wind direction angle of the auxiliary flow fan 4 will turn the air to ensure that the air entering the cooling tower can flow out of the cooling tower as quickly as possible, thereby ensuring the ventilation performance of the entire tower.

[0033] The airflow direction is redirected. The bottom of the tower body 1 is equipped with louvers 9 for air to enter. The interior of the tower body 1 is provided with a spray assembly 6, a second water collection assembly 7, a packing assembly 8 and a water collection tank from top to bottom.

[0034] The first water collecting assembly 5 is used to collect high-temperature liquid drops which are sprayed by the spraying assembly 6 and are not exchanged by the filler assembly 8 and are mixed in the rising air, and the high-temperature liquid drops re-enter the spraying assembly 6. The part of the high-temperature liquid drops collected by the conventional cooling tower water collector also continuously gather into large liquid drops under the action of surface tension, and after becoming large liquid drops, the liquid drops drop into the lower filler for heat exchange under the action of gravity, but the liquid drop radius of these liquid drops is large compared with the liquid drops sprayed by the spraying assembly 6, so the gas-liquid contact area is small, the heat exchange effect is poor, and in addition, the water distribution range of these liquid drops is also small compared with the liquid drops sprayed by the spraying assembly 6. Therefore, for the optimization of the thermal performance of the cooling tower, the thermal performance of the liquid drops collected by the water collecting assembly is very poor compared with the liquid drops sprayed by the spraying assembly 6, so the first water collecting assembly 5 in the application recycles the high-temperature liquid drops into the circulation process of the cooling tower, so that the high-temperature liquid drops are sprayed from the spraying head again, thereby achieving better thermal performance.

[0035] The first water collecting assembly 5 includes a plurality of water collecting units distributed vertically, and the water collecting units include water collecting circular grooves 501, air deflectors 502 and water collecting plates 503 distributed from top to bottom, and a plurality of water collecting units divide the fluid passage into a plurality of fluid passages, and the vertical height of a single fluid passage is reduced, thereby reducing the flow resistance of the air flowing around the air deflector 502.

[0036] The air deflector 502 is welded on the side wall of the air duct 2, the spacing between the water collecting plate 503 and the air deflector 502 is much smaller than the spacing between the water collecting circular groove 501 and the air deflector 502, and the small spacing between the water collecting plate 503 and the air deflector 502 is mainly used for the collected liquid drops to pass through, and since the spacing between the two is very small, most of the air will flow upwards to bypass the air deflector 502, and the liquid drops carried out from between the air deflector 502 and the water collecting plate 503 by the air are very small, and the front end of the water collecting plate 503 along the air flow direction is provided with a baffle 505 to prevent a small amount of liquid drops mixed in the air passing between the water collecting plate 503 and the air deflector 502. The water collecting plate 503 gradually inclines upwards along the air flow direction, the air flow direction is consistent with the inclination direction of the water collecting plate 503 by the auxiliary fan 4, and the air flow is better guaranteed. The water collecting circular groove 501 of the lower water collecting unit in the adjacent two water collecting units is located at the bottom surface of the water collecting plate 503 of the upper water collecting unit, and the water collecting plate 503 in the lowermost water collecting unit is provided with a water outlet hole 504 at the rear along the air flow direction, and the water outlet hole 504 is in communication with the water inlet of the spraying assembly 6.

[0037] The groove wall of the water collecting groove 501 extends downwardly with a guide section 5011, the guide section 5011 is gradually bent in the direction opposite to the air flow direction, each water collecting groove 501 has two guide sections 5011, the guide section 5011 at the rear end in the air flow direction is beneficial to the air entering the water collecting groove 501 and colliding with the water collecting groove 501 to form a liquid film, and the guide section 5011 at the front end is beneficial to the small liquid drops in the water collecting groove 501 gathering to form large liquid drops and falling on the water collecting plate 503.

[0038] The air comes to the first water collecting assembly 5 by the main flow distributor 3 and the auxiliary fan 4, in the process of air flowing around, due to the large inertia of the liquid drops, the air will continue to flow like before by bypassing the air deflector 502, and the liquid drops will be thrown into the water collecting groove 501, the liquid drops will be captured by the wall in the water collecting groove 501 to form a liquid film, the small liquid drops attached to the water collecting groove 501 will continuously aggregate to form large liquid drops due to the surface tension effect, and the formed large liquid drops will finally flow into the water collecting plate 503 below along the wall of the water collecting groove 501 under the action of gravity, the water collecting plate 503 is arranged obliquely, so the liquid drops falling on the water collecting plate 503 will flow downwardly, and finally flow out from the water outlet hole 504.

[0039] The second water collecting assembly 7 is used for collecting the heat exchange liquid drops mixed in the rising air after heat exchange by the filler assembly 8, because the part of liquid drops has been heat exchanged with the filler and has been cooled, collecting the part of liquid drops not only achieves the water saving effect, but also avoids the cold energy loss.

[0040] The second water collecting assembly 7 includes two turbulence water collecting plates, each turbulence water collecting plate includes a base plate 701, a plurality of through grooves 7011 are arranged on each base plate 701 in a spaced manner, an arc-shaped upper bending plate 702 protruding upwardly is arranged above each through groove 7011, and an arc-shaped lower bending plate 703 protruding downwardly is arranged below each through groove 7011, the upper bending plate 702 and the lower bending plate 703 are respectively bent from the opposite two groove walls of the through groove 7011 towards each other, and the tail portions of the upper bending plate 702 and the lower bending plate 703 are respectively provided with a gap 704 with the base plate 701, the tail portion of the upper bending plate 702 is bent downwardly to form a blocking edge 7021 to further block the liquid drops in the air, the two turbulence water collecting plates are respectively a left turbulence water collecting plate and a right turbulence water collecting plate, the lower bending plates 703 on the left turbulence water collecting plate are all bent downwardly from right to left, and the lower bending plates 703 on the right turbulence water collecting plate are all bent downwardly from left to right. A connecting rod 705 is arranged between the two base plates 701, the connecting rod 705 is provided with a through hole 7051 penetrating from top to bottom, and the two base plates 701 gradually move away from each other from top to bottom, the water sprayed by the spraying assembly 6 flows into the filler assembly 8 along the inclined base plate 701, the through grooves 7011 on the base plate 701 and the through hole 7051 on the connecting rod 705.

[0041] Because the density of water is much greater than the density of air, when the air mixed with water droplets flows upward from the lower part of the spoiler water collecting plate, it first enters the gap 704 between the lower bending plate 703 and the base plate 701, then passes through the through slot 7011, and finally flows out of the gap 704 between the upper bending plate 702 and the base plate 701. Under the action of the inertia of the water droplets, most of the water droplets will collide on the upper bending plate 702 and the lower bending plate 703 to form a liquid film. Due to the surface tension of the water droplets, smaller water droplets will continuously gather to form larger water droplets, and the larger water droplets will eventually fall back into the water collecting pool under the action of gravity due to the increase in their own volume.

[0042] Working principle:

[0043] The hot water sprayed in the spray assembly 6 exchanges heat with the air entering the louver 9 inside the filler assembly 8. The air after heat exchange moves upward under the action of the main flow fan 3. During the movement process, the air mixed with the heat-exchanged water droplets brought from the filler assembly 8 first collides with the two spoiler water collecting plates to form a liquid film, and then gathers to form large droplets and falls back into the water collecting pool. Then the air continues to move upward under the action of the main flow fan 3, and is mixed with part of the liquid droplets directly sprayed from the spray assembly 6. The air reaches the first water collecting assembly 5 after being diverted by the auxiliary fan 4. The air mixed with high-temperature liquid droplets brought from the spray assembly 6 contacts the air deflector 502. The air flows outwards around the air deflector 502, and the liquid droplets are thrown into the water collecting circular groove 501 to form a liquid film. After gathering into large droplets, the liquid droplets fall onto the water collecting plate 503 and flow out of the water outlet hole 504. After being collected, the liquid droplets enter the spray assembly 6 and are sprayed out again.

[0044] The above ideal embodiments according to the present application are for inspiration. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the contents in the specification, and must be determined according to the scope of the claims.

Claims

1. A high-efficiency cooling tower based on zoned water collection, characterized in that: The tower body (1) includes a wind duct (2) at the top of the tower body (1), and a fan and a first water collection component (5) are arranged in sequence inside the wind duct (2) along the air flow direction. The tower body (1) is arranged in sequence from top to bottom as a spray component (6), a second water collection component (7) and a packing component (8). The first water collection component (5) is used to collect high-temperature droplets sprayed out by the spray component (6) and mixed in the rising air without heat exchange by the packing component (8), and the high-temperature droplets re-enter the spray component (6). The second water collection component (7) is used to collect heat exchange droplets that are trapped in the rising air after heat exchange by the packing component (8), and the heat exchange droplets fall into the water collection tank; The second water collection component (7) includes two turbulence-collecting plates, each of which includes a base plate (701). Each base plate (701) has several through slots (7011) spaced apart. Each through slot (7011) has an upwardly convex arc-shaped upper bending plate (702) above it and a downwardly convex arc-shaped lower bending plate (703) below it. The upper bending plate (702) and the lower bending plate (703) are respectively located within the through slots (7011). 011) The two opposing tank walls are bent toward each other, and the tails of the upper bent plate (702) and the lower bent plate (703) are left with gaps (704) between them and the substrate (701). The two turbulence-collecting plates are the left turbulence-collecting plate and the right turbulence-collecting plate, respectively. The lower bent plates (703) on the left turbulence-collecting plate are bent downward from right to left, and the lower bent plates (703) on the right turbulence-collecting plate are bent downward from left to right.

2. The high-efficiency cooling tower based on zoned water collection according to claim 1, characterized in that: The first water collection component (5) includes several water collection units distributed vertically. Each water collection unit includes a water collection trough (501), an air guide plate (502), and a water collection plate (503) distributed from top to bottom. The distance between the water collection plate (503) and the air guide plate (502) is smaller than the distance between the water collection trough (501) and the air guide plate (502). The water collection plate (503) gradually tilts upward along the air flow direction. The water collection trough (501) of the lower water collection unit in two adjacent water collection units is located on the bottom surface of the water collection plate (503) of the upper water collection unit. The water collection plate (503) in the lowest water collection unit has a water outlet (504) at the rear along the air flow direction.

3. The high-efficiency cooling tower based on zoned water collection according to claim 1, characterized in that: The fan includes a main fan (3) and an auxiliary fan (4). The auxiliary fan (4) is used to direct air to the first water collection component (5). The duct (2) includes a ventilation section (201) for the main fan (3), an arc section (202) for the auxiliary fan (4), and a water collection section (203) for the first water collection component (5).

4. The high-efficiency cooling tower based on zoned water collection according to claim 1, characterized in that: The tail of the upper bending plate (702) bends downward to form a retaining edge (7021).

5. The high-efficiency cooling tower based on zoned water collection according to claim 2, characterized in that: The water collection plate (503) has a baffle (505) at its front end along the airflow direction.

6. The high-efficiency cooling tower based on zoned water collection according to claim 1, characterized in that: A connecting rod (705) is provided between the two substrates (701). The connecting rod (705) has a through hole (7051) extending from top to bottom, and the two substrates (701) gradually move away from each other from top to bottom.

7. The high-efficiency cooling tower based on zoned water collection according to claim 2, characterized in that: The water collection trough (501) has a guide section (5011) extending downward from its wall, and the guide section (5011) gradually bends in the opposite direction to the airflow.

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