Novel open type cooling tower

Abstract

The utility model discloses a novel open type cooling tower which comprises a tower body, and a heat dissipation area and a heat transfer area are sequentially distributed on the tower body from top to bottom. The heat dissipation area comprises a fan and a spraying system; the heat transfer area is located below the spraying system and comprises a cooling flow channel, a water receiving groove and a heat pipe set. The bottom of the heat pipe set is located in the cooling flow channel, and the top of the heat pipe set is located below the spraying system. Cooling water enters the tower body from the liquid inlet of the spraying system, the heat pipe set transmits heat to the heat dissipation area for cooling, and the cooled cooling water is located in the cooling flow channel and finally flows out from the liquid outlet in the side wall of the tower body. The utility model has the advantages that the heat pipe is adopted to replace the filler in the traditional open type cooling tower, and the traditional heat exchange mode of increasing the contact area is changed into the heat exchange mode of increasing the cross sectional area of the heat pipe, so that the heat transfer efficiency is improved, and the overall occupied area of the tower body is reduced at the same time; in addition, the problems of water quality degradation, heat-conducting property reduction and the like caused by the fact that the filler is contaminated with pollutants can be effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooling towers, in particular to a novel open cooling tower. Background Art

[0002] A cooling tower is a structure used to cool water at a certain temperature. It is commonly found in power plants, chemical plants, cement plants, and other factories that require a large amount of water temperature control. The working principle of a cooling tower is to use the wind blowing in and the water sprinkled from top to bottom to form convection to remove the heat source. Part of the water evaporates in the convection, taking away the corresponding latent heat of evaporation, thereby reducing the temperature of the water.

[0003] Existing cooling towers can be divided into two types: open cooling towers and closed cooling towers. Since the cost of a closed cooling tower is much higher than that of an open cooling tower, for cost-effectiveness considerations, open cooling towers are usually used in places where the cooling water quality requirements are not high. The structure of the existing open cooling tower can refer to patent CN219934702U, the patent name is "an open cooling tower"; or patent CN216558390U, the patent name is "open cooling tower". The specific working principle of an open cooling tower is to spray circulating water onto the glass fiber filler in a spray manner, achieve heat exchange through the contact between water and air, and then drive the air flow in the tower to circulate by a fan, so that the hot air flow after heat exchange with water is brought out, thereby achieving a cooling effect. It can be seen that the existing open cooling tower has the following shortcomings: 1. Since the open cooling tower directly sprays cooling water on the filler, and the filler is directly exposed to the air for a long time, it is contaminated with a lot of dust and other pollutants in the air. Therefore, when the cooling water contacts the filler, the pollutants on the surface of the filler will be mixed, causing the deterioration of the cooling water quality. 2. After the cooling water is sprayed on the filler, it will breed microorganisms or bacteria due to contact with the air. Due to the poor thermal conductivity of the filler, a huge surface area is required to achieve the required heat transfer effect, and the amount of bacteria or microorganisms is proportional to the surface area in contact with the air. Therefore, the open cooling tower will produce more pollutants deposited in the tower body, which requires regular maintenance and timely cleaning in the later stage, and its operation and maintenance costs are high. 3. Since the open cooling tower directly sprays cooling water on the filler, if you want to enhance its heat transfer efficiency, you need to increase the contact area between the cooling water and the filler. Therefore, in general, the diameter of the open cooling tower is larger, which makes its volume larger, so when using the open cooling tower, it is necessary to have a certain floor space.

[0004] The patent CN117906406A "Cooling Water Regeneration Tower" applied by the applicant before proposed a feasible method of improving heat transfer efficiency by using heat pipes (groups). From a structural point of view, since a partition plate is provided between the cooling channel and the heat transfer area in the patent, the cooling channel and the heat transfer area are relatively isolated, so the patent is closer to the structure of a closed cooling tower. In addition, since the cooling water and the spray water output by the spray system in the patent are two different liquid sources, the spray water needs to be stored in the spray pump installation area, and the spray water is pumped to the spray head by the spray circulation pump, and then output to the heat transfer area; this increases the manufacturing cost and also increases the floor space of the tower body.

[0005] In order to solve the above problems, designing a new type of open cooling tower is an important technical problem that technicians in this field need to solve. Utility Model Content

[0006] The purpose of the utility model is to solve the above problems existing in the prior art and to provide a novel open cooling tower.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] A novel open cooling tower comprises a tower body, wherein the tower body is provided with a heat dissipation zone and a heat transfer zone in sequence from top to bottom; the heat dissipation zone comprises a fan arranged at the top of the tower body and a spray system arranged below the fan; the heat transfer zone is located below the spray system, and comprises a cooling channel arranged at the bottom of the heat transfer zone, a water receiving trough arranged above the cooling channel at intervals, and a heat pipe group penetrating the water receiving trough; the bottom of the heat pipe group is located in the cooling channel, and the top is located below the spray system; cooling water enters the tower body from the liquid inlet of the spray system, transfers heat to the heat dissipation zone for cooling through the heat pipe group, and the cooled cooling water is located in the cooling channel and finally flows out from the liquid outlet on the side wall of the tower body.

[0009] Preferably, the cooling channel is distributed in a spiral shape at the bottom of the tower body; the top of the cooling channel is spaced apart from the bottom of the water receiving trough.

[0010] Preferably, the height of the partition plate in the cooling channel close to the axis of the tower body is greater than the height of the partition plate close to the side wall of the tower body, and decreases gradually.

[0011] Preferably, the outer dimension of the water receiving trough is smaller than the inner dimension of the tower body, and the two are connected via a bracket.

[0012] Preferably, the heat pipe group consists of a group of heat pipes vertically and evenly distributed in the tower body; each of the heat pipes includes a condensing section located below the water receiving trough and an evaporating section located above the water receiving trough; at least a group of fins are integrally provided on the outer periphery of the evaporating section.

[0013] Preferably, the fin is inclined toward the water receiving trough, and the wing root of the fin is higher than the wing tip.

[0014] Preferably, the minimum height of the liquid outlet is not less than half of the minimum distance from the water receiving trough to the tower body, and the maximum height is not higher than the lowest surface of the water receiving trough.

[0015] Preferably, the spray system comprises a spray pipe connected to the liquid inlet and a group of spray heads arranged on the spray pipe; the spray heads are located above the evaporation section.

[0016] Preferably, the inner contour of the tower body and the outer contour of the water receiving trough are circular; and the fan is arranged concentrically with the top of the tower body.

[0017] The advantages of the technical solution of the utility model are mainly reflected in:

[0018] The filler in the traditional open cooling tower is partially eliminated and replaced by heat pipes. The traditional heat exchange method of increasing the contact area is changed to heat exchange by increasing the cross-sectional area of ​​the heat pipe, which improves the heat transfer efficiency while reducing the overall floor space of the tower. In addition, it can effectively avoid problems such as water quality deterioration and reduced thermal conductivity due to filler contamination;

[0019] The high-temperature cooling water is output from the spray head of the spray system. Compared with the prior art, it is only necessary to start the spray system without setting up a separate spray circulation pump, which makes the structure simpler, and the tower body occupies a smaller area, reducing production costs;

[0020] In the utility model, the liquid outlet is arranged on the side wall of the tower body, and the liquid outlet is in a normally open state, and there is no need to think or system control its opening. As long as the cooling water reaches the position of the liquid outlet, it can be discharged from the tower body, effectively reducing the accumulation of cooling water in the tower body, so as to improve the transmission efficiency of cooling water. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 : A cross-sectional view of a preferred embodiment of the utility model in the main viewing direction;

[0022] Figure 2 : A top view of a preferred embodiment of the utility model;

[0023] Figure 3 : A cross-sectional view in the top view of a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0024] The purpose, advantages and features of the present invention will be illustrated and explained through the non-limiting description of the following preferred embodiments. These embodiments are only typical examples of the application of the technical solution of the present invention, and any technical solution formed by equivalent replacement or equivalent transformation falls within the scope of protection claimed by the present invention.

[0025] In the description of the scheme, it should be noted that the terms "center", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Moreover, in the description of the scheme, with the operator as a reference, the direction close to the operator is the proximal end, and the direction away from the operator is the distal end.

[0026] like Figure 1 As shown, the utility model discloses a novel open cooling tower, including a tower body 100, wherein the tower body 100 is sequentially provided with a heat dissipation area 1 and a heat transfer area 2 from top to bottom. The heat dissipation area 1 includes a fan 11 disposed at the top of the tower body 1 and a spray system 12 disposed below the fan 11. Figure 1 to Figure 2 As shown, the fan 11 is arranged concentrically with the top of the tower body 100. A liquid inlet 101 is arranged on the side wall of the tower body 100 near its top for the entry of high-temperature cooling water; the spray system 12 includes a spray pipe 121 connected to the liquid inlet 101 and a group of spray heads 122 arranged on the spray pipe 121. The high-temperature cooling water is output from the spray head 122 on the spray pipe 121 and enters the heat transfer area 2.

[0027] Combination Figure 1 and Figure 3 As shown, the heat transfer area 2 is located below the spray system 12, and includes a cooling channel 21 disposed at the bottom of the heat transfer area 2, a water receiving trough 22 disposed above the cooling channel 21 at intervals, and a heat pipe group 23 penetrating the water receiving trough 22. Further, in this embodiment, the cooling channel 21 is preferably distributed in a spiral shape at the bottom of the tower body 100; and the top of the cooling channel 21 is spaced from the bottom of the water receiving trough 22.

[0028] The outer dimension of the water receiving trough 22 is smaller than the inner dimension of the tower body 100, and the two are connected by a bracket 220. Furthermore, in this embodiment, the inner contour of the tower body 100 and the outer contour of the water receiving trough 22 are preferably designed to be circular. Designing the cross-section of the tower body 100 and the water receiving trough 22 to be circular can reduce the overall floor space, thereby reducing the manufacturing cost.

[0029] A portion of the high-temperature cooling water outputted by the spray head 122 will be carried in the water receiving groove 22, and the other portion will overflow into the cooling channel 21 along the inner wall of the tower body 100 or from the notch of the water receiving groove 22. In the process of high-temperature cooling water entering the tower body 100, part of its heat is dissipated before falling into the cooling channel 21 or by the fan 11.

[0030] Part of the high-temperature cooling water in the water receiving tank 22 can also fall into the cooling channel 21 through the small gap between the water receiving tank 22 and the heat pipe group 23. Figure 1 As shown, the bottom of the heat pipe group 23 is located in the cooling channel 21, and the top is located below the spray system 12. Further, the heat pipe group 23 is composed of a group of heat pipes vertically and evenly distributed in the tower body 100; each of the heat pipes includes a condensation section 231 located below the water receiving tank 22 and an evaporation section 232 located above the water receiving tank 22; at least the outer periphery of the evaporation section 232 is integrally provided with a group of fins 233. Furthermore, the fins 233 are inclined toward the water receiving tank 22, and the fin root is higher than the fin tip, so as to guide the high-temperature cooling water on the fins 233. The spray head 122 is located above the evaporation section 232. It can be seen that after the high-temperature cooling water output by the spray head 122 is sprayed on the fins 233, it will slide into the water receiving groove 22 under the inclined guidance of the fins 233 and its own gravity, and gradually accumulate; part of the cooling water will fall into the cooling channel 21 from the gap between the heat pipe and the water receiving groove 22.

[0031] The high-temperature cooling water falling into the cooling channel 21 will contact the condensation section 231 below the heat pipe, and the condensation section 231 will absorb heat and transfer the heat to the evaporation section 232, while causing the refrigerant in the heat pipe to undergo a phase change. Specifically, after being heated, the refrigerant medium will absorb heat from a liquid or solid state and become an evaporated gas. This is because the temperature of the refrigerant is lower than the temperature of the cooling water, so it can absorb the heat of the cooling water; the evaporated refrigerant enters the top of the heat pipe in the form of gas, and the heat is transferred to the outside of the heat pipe. After the temperature is lowered, it condenses and flows back to the bottom of the heat pipe. After being heated, the evaporation section 232 transfers the heat to the fins 233 again, and the fins 233 dissipate the heat into the tower body 100; and the wind blown out by the fan 11 forms convection with the air in the tower body, thereby discharging the heat from the tower body to achieve cooling.

[0032] Furthermore, in this embodiment, the height of the partition plate 211 in the cooling channel 21 near the axis of the tower body 100 is preferably greater than the height of the partition plate 211 near the side wall of the tower body 100, and the height decreases gradually. It can be seen that when the high-temperature cooling water slides or overflows from the water receiving trough 22 into the cooling channel 21, it will first flow into the innermost channel between the two partition plates closest to the axis of the tower body 100, and gradually flow out to the outer channel. During the flow, the temperature is gradually reduced and the heat pipes on the heat pipe group 23 are gradually contacted and heat is exchanged. In addition, when the high-temperature cooling water accumulates at the top of the highest partition plate, it will overflow from the top of the highest partition plate and gradually flow into the cooling channel located on the outside.

[0033] The cooling water enters the tower body 1 from the liquid inlet 101 of the spray system 12, transfers the heat to the heat dissipation area 1 for cooling through the heat pipe group 23, and the cooled cooling water is located in the cooling channel 21, and finally flows out from the liquid outlet 102 on the side wall of the tower body 1. The high-temperature cooling water is output from the spray head 122 of the spray system 12. Compared with the existing patent CN117906406A "Cooling Water Regeneration Tower", it is only necessary to start the spray system 12, and there is no need to set up a spray circulation pump, which makes the structure simpler, and the tower body 100 occupies a smaller area, further reducing the production cost.

[0034] In addition, if Figure 1As shown, the minimum height of the liquid outlet 102 is not less than half of the minimum distance from the water receiving trough 22 to the tower body 100, and the maximum height is not higher than the lowest surface of the water receiving trough 22. By adjusting the height of the liquid outlet 102, the storage time and storage amount of cooling water in the tower body 100 can be controlled, thereby adjusting the heat exchange time of cooling water in the tower body 100. In this embodiment, it is preferred to set the liquid outlet 102 at the maximum height, so that the storage amount of cooling water in the tower body 100 is large, the storage time is long, and the heat exchange time is increased, so as to reduce the temperature of the high-temperature cooling water to the greatest extent, and ensure that the cooling water output from the liquid outlet 102 reaches the required temperature.

[0035] In summary, in this embodiment, the high-temperature cooling water has already dissipated part of the heat into the tower body 100 during the process of being output from the spray head 122 to the tower body 100, and at the same time, the high-temperature cooling water is initially cooled by the fan 11; and the high-temperature cooling water after the initial cooling will pass through the heat pipe group 23 for heat transfer, and then pass through the fan 11 to accelerate air circulation and heat dissipation, thereby cooling the high-temperature cooling water again and forming condensed water; the condensed water then overflows along the inner wall of the tower body 100 or the water receiving trough 22 into the cooling channel 21, and then accumulates in the cooling channel 21. Therefore, the cooling water in the cooling channel 21 has completed the cooling operation and becomes low-temperature cooling water when it reaches the liquid outlet 102. At this time, the cooling water can be directly discharged through the liquid outlet 102, and the liquid outlet 102 does not need to be opened manually or by the system.

[0036] After cooling, part of the condensed water will also fall into the water receiving tank 22 and be neutralized with the high-temperature cooling water in the water receiving tank 22 to reduce the temperature of the cooling water in the water receiving tank 22; at the same time, the high-temperature cooling water and part of the condensed water will also overflow into the cooling channel 21 for cooling treatment. Since the high-temperature cooling water in the water receiving tank 22 has been neutralized with part of the condensed water, its temperature has been reduced. When it overflows into the cooling channel 21 for cooling treatment, the cooling treatment time is relatively short. Therefore, the technical solution disclosed by the utility model can effectively improve the cooling speed of the high-temperature cooling water entering the tower body 100 and achieve rapid cooling.

[0037] Furthermore, in order to improve the safety of the tower body, the utility model preferably installs a switch valve 103 on the pipeline provided with the liquid inlet 101 and the liquid outlet 102 to effectively control the high-temperature cooling water entering the tower body 100 and / or the low-temperature cooling water discharging from the tower body 100.

[0038] In the prior art including the above patent, the liquid outlet of the cooling tower is usually set at the bottom of the tower body 100, so the liquid outlet is closed under normal conditions and can only be opened manually or by system control when the cooling water needs to be discharged; and before opening the liquid outlet, it is necessary to ensure that the cooling water in the cooling channel connected to it has completed heat transfer and achieved cooling. In the utility model, the liquid outlet is set on the side wall of the tower body 100, and the liquid outlet is in a normally open state. As long as the cooling water reaches the position of the liquid outlet, it can be discharged from the tower body, effectively reducing the accumulation of cooling water in the tower body to improve the transmission efficiency of cooling water.

[0039] The utility model eliminates the filler part in the traditional open cooling tower and replaces it with a heat pipe, changing the traditional heat exchange method of increasing the contact area to heat exchange by increasing the cross-sectional area of ​​the heat pipe, thereby improving the heat transfer efficiency while reducing the overall footprint of the tower body; in addition, it can also effectively avoid the problems of water quality deterioration and reduced thermal conductivity due to filler contamination.

[0040] There are many implementation methods of the utility model, and all technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of the utility model.

Claims

1. A novel open cooling tower, comprising a tower body (100), wherein the tower body (100) is provided with a heat dissipation zone (1) and a heat transfer zone (2) in order from top to bottom; the heat dissipation zone (1) comprises a fan (11) arranged at the top of the tower body (100) and a spray system (12) arranged below the fan (11); the characteristics are: The heat transfer zone (2) is located below the spray system (12), and comprises a cooling channel (21) arranged at the bottom of the heat transfer zone (2), a water receiving trough (22) arranged above the cooling channel (21), and a heat pipe group (23) penetrating the water receiving trough (22); the bottom of the heat pipe group (23) is located in the cooling channel (21), and the top is located below the spray system (12); cooling water enters the tower body (100) from the liquid inlet (101) of the spray system (12), transfers heat to the heat dissipation zone (1) through the heat pipe group (23) for cooling, and the cooled cooling water is located in the cooling channel (21) and finally flows out from the liquid outlet (102) on the side wall of the tower body (100).

2. A novel open cooling tower according to claim 1, characterized in that: The cooling channel (21) is distributed in a spiral shape at the bottom of the tower body (100); the top of the cooling channel (21) and the bottom of the water receiving trough (22) are arranged at a distance.

3. A novel open cooling tower according to claim 2, characterized in that: The height of the partition plate (211) in the cooling channel (21) close to the axis of the tower body (100) is greater than the height of the partition plate (211) close to the side wall of the tower body (100), and the heights gradually decrease.

4. A novel open cooling tower according to claim 2, characterized in that: The outer dimensions of the water receiving trough (22) are smaller than the inner dimensions of the tower body (100), and the two are connected via a bracket (220).

5. A novel open cooling tower according to claim 3, characterized in that: The heat pipe group (23) is composed of a group of heat pipes vertically and evenly distributed in the tower body (100); each of the heat pipes comprises a condensing section (231) located below the water receiving tank (22) and an evaporating section (232) located above the water receiving tank (22); at least the outer periphery of the evaporating section (232) is integrally provided with a group of fins (233).

6. A novel open cooling tower according to claim 5, characterized in that: The fin (233) is inclined in the direction of the water receiving tank (22), and the wing root of the fin (233) is higher than the wing tip.

7. A novel open cooling tower according to claim 1, characterized in that: The minimum height of the liquid outlet (102) is not less than half of the minimum distance from the water receiving trough (22) to the tower body (100), and the maximum height is not higher than the lowest surface of the water receiving trough (22).

8. A novel open cooling tower according to claim 5, characterized in that: The spray system (12) comprises a spray pipe (121) connected to the liquid inlet (101) and a group of spray heads (122) arranged on the spray pipe (121); the spray heads (122) are located above the evaporation section (232).

9. A novel open cooling tower according to claim 6, characterized in that: The inner contour of the tower body (100) and the outer contour of the water receiving trough (22) are circular; and the fan (11) is arranged concentrically with the top of the tower body (100).

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