Cooling water circulation system and cooling tower

Abstract

The utility model provides a cooling water circulation system and a cooling tower. The cooling water circulation system comprises a closed tower body, a spraying cooling device, a spraying device, a first water suction pump and a second water suction pump, a water storage area is formed at the inner bottom of the closed tower body, and a cooling area and a heat exchange area are formed above the water storage area in the closed tower body; the spraying cooling device is arranged in the cooling area, and the spraying device is arranged in the heat exchange area; the input end of the first water suction pump is communicated with the water storage area, and the output end of the first water suction pump is communicated with the spraying cooling device; the input end of the second water suction pump is communicated with the water storage area, and the output end of the second water suction pump is communicated with the spraying device. The utility model has the advantages that the surface of the heat exchange tube bundle is not easy to scale, and the heat exchange effect between external circulating water and internal circulating water of the heat exchange tube bundle is ensured.

Description

[Technical Field]

[0001] This utility model relates to the field of cooling tower technology, and in particular to a cooling water circulation system and a cooling tower. [Background Technology]

[0002] Evaporative cooling towers consist of internal and external circulation. Internal circulation involves high-temperature circulating water entering the heat exchange tube bundle of the evaporative cooling tower and exchanging heat with the spray water on the outside of the tube bundle, thus cooling the high-temperature circulating water to the required process temperature. External circulation involves using a water pump to draw water and spray it onto the outside of the heat exchange tube bundle, while a fan drives the air inside the tower to circulate, ensuring that the spray water, heat exchange tube bundle, and air are in full contact to achieve heat and mass transfer, thereby removing the heat from the high-temperature circulating water inside the heat exchange tube bundle and achieving a cooling effect.

[0003] In some evaporative cooling towers, to save water, the sprayed water is usually collected at the bottom of the tower and pumped out for recycling. However, the temperature of the sprayed water increases after heat exchange, which can affect the subsequent heat exchange efficiency. Furthermore, the water quality is easily polluted by the environment, leading to scaling on the heat exchange tubes and further impacting heat exchange performance. In view of these problems, the inventors conducted in-depth research, resulting in this invention. [Utility Model Content]

[0004] The technical problem to be solved by this utility model is to provide a cooling water circulation system and a cooling tower that can cool the collected spray water and ensure the water quality of the spray water.

[0005] This utility model is implemented as follows:

[0006] In a first aspect, a cooling water circulation system includes a closed tower body, a spray cooling device, a jetting device, a first water pump, and a second water pump.

[0007] The bottom of the closed tower body forms a water storage area, and a cooling area and a heat exchange area are formed above the water storage area inside the closed tower body; the spray cooling device is set in the cooling area, and the spray device is set in the heat exchange area; the input end of the first water pump is connected to the water storage area, and the output end of the first water pump is connected to the spray cooling device; the input end of the second water pump is connected to the water storage area, and the output end of the second water pump is connected to the spray device.

[0008] Furthermore, a partition is provided between the water storage area and the cooling area and the heat exchange area. A water collection tank and a clean water tank are formed in the water storage area. Water inlet holes are provided on the partition to connect the cooling area and the heat exchange area with the water collection tank. The first water pump is connected to the water collection tank, and the second water pump is connected to the clean water tank.

[0009] Furthermore, the water collection tank and the clean water tank are separated by an overflow plate, the height of which is lower than the height around the water collection tank and the clean water tank.

[0010] Furthermore, a first filter device is provided at the upper end of the overflow plate.

[0011] Furthermore, the first filtration device is a suspended matter filter screen disposed at the upper end of the overflow plate.

[0012] Furthermore, the spray cooling device includes a packing material with a honeycomb structure and a spray pipe; the packing material is disposed in the cooling area, the spray pipe is disposed above the packing material, and the spray pipe is connected to a first water pump through a first delivery pipeline.

[0013] Furthermore, a second filter device is provided at the input end of the second water pump.

[0014] Furthermore, the spraying device includes a diversion pipe, a second conveying pipe, and nozzles; several diversion pipes are arranged from bottom to top in the heat exchange area, and several nozzles are installed on each diversion pipe. Each diversion pipe is connected to a second water pump through the second conveying pipe.

[0015] Furthermore, the nozzle is a wide-angle fan-shaped nozzle, and the second water pump is a high-pressure jet pump.

[0016] Secondly, a cooling tower includes the aforementioned cooling water circulation system and heat exchange tube bundle; the heat exchange tube bundle is arranged vertically within the heat exchange area, and a circulating water inlet is provided at the lower end of the heat exchange tube bundle, while a circulating water outlet is provided at the upper end of the heat exchange tube bundle.

[0017] By adopting the technical solution of this utility model, at least the following beneficial effects are achieved:

[0018] 1. By forming a cooling zone within the closed tower body and installing a spray cooling device within the cooling zone, and connecting the spray cooling device to the water storage area via a first water pump, the external circulating water in the water storage area can be drawn by the first water pump and sprayed onto the spray cooling device for cooling during actual use, thereby ensuring the heat exchange effect between the external circulating water and the internal circulating water of the heat exchange tube bundle.

[0019] 2. By forming a water collection tank and a clean water tank within the water storage area, and connecting both the cooling area and the heat exchange area to the water collection tank, connecting the first water pump to the water collection tank, and the second water pump to the clean water tank, and installing a first filter device at the top of the overflow plate between the water collection tank and the clean water tank, it is possible to achieve the following in practical use: Firstly, the first water pump can draw external circulating water from the water collection tank for spray cooling; secondly, both the external circulating water after heat exchange in the heat exchange area and the external circulating water after cooling in the cooling area can be collected in the water collection tank. This better achieves the desired cooling effect. The used external circulating water is cooled to ensure the subsequent heat exchange effect and allows sediment to form in the collection tank, filtering out particulate matter and other impurities. On the other hand, the external circulating water after sedimentation and cooling can overflow into the first filtration device and then enter the clean water tank. This ensures the water quality of the external circulating water pumped by the second pump, thus ensuring that the surface of the heat exchange tube bundle is not prone to scaling after the external circulating water is sprayed onto it, thereby ensuring the heat exchange performance of the heat exchange tube bundle.

[0020] 3. By equipping the second water pump with a second filter device, it can prevent the second water pump from being blocked by foreign objects, and further improve the quality of the external circulating water sprayed onto the heat exchange tube bundle, thereby further reducing the occurrence of scaling on the surface of the heat exchange tube bundle. [Attached Image Description]

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a front view of a cooling water circulation system according to this utility model;

[0023] Figure 2 This is a top view of a cooling water circulation system according to this utility model;

[0024] Figure 3 yes Figure 2 Enlarged view of part A in the middle;

[0025] Figure 4 This is a front view of a cooling tower according to this utility model;

[0026] Figure 5 This is a top view of a cooling tower according to this utility model.

[0027] Explanation of reference numerals in the attached figures:

[0028] Cooling water circulation system 100;

[0029] Cooling tower 200;

[0030] Heat exchanger tube bundle 300, circulating water inlet 301, circulating water outlet 302;

[0031] Closed tower body 1, water storage area 11, cooling area 12, heat exchange area 13, baffle 14, water inlet 141;

[0032] Spray cooling device 2, packing 21, spray pipe 22, first conveying pipeline 23;

[0033] Spraying device 3, diversion pipe 31, second delivery pipe 32, nozzle 33;

[0034] First water pump 4;

[0035] Second water pump 5, second filter device 51;

[0036] Water collection tank 61, clean water tank 62, overflow plate 63, first filter device 64.

Detailed Implementation Methods

[0037] To better understand the technical solution of this utility model, the technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] It should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing these embodiments and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0039] Example 1

[0040] Please see Figures 1 to 3 As shown, the present invention provides a cooling water circulation system 100, which includes a closed tower body 1, a spray cooling device 2, a jet device 3, a first water pump 4, and a second water pump 5.

[0041] The inner bottom of the closed tower body 1 forms a water storage area 11, which is used to collect and store external circulating water (i.e., spray water); a cooling area 12 and a heat exchange area 13 are formed above the water storage area 11 inside the closed tower body 1; the spray cooling device 2 is installed in the cooling area 12, and the spray device 3 is installed in the heat exchange area 13; the input end of the first water pump 4 is connected to the water storage area 11, and the output end of the first water pump 4 is connected to the spray cooling device 2; the input end of the second water pump 5 is connected to the water storage area 11, and the output end of the second water pump 5 is connected to the spray device 3. In specific operation, the cooling water circulation system 100 of this utility model can use the first water pump 4 to draw external circulating water from the water storage area 11 to the spray cooling device 2, and the spray cooling device 2 sprays the external circulating water to the cooling area 12 to exchange heat with the external natural wind to achieve cooling; at the same time, the second water pump 5 can draw external circulating water from the water storage area 11 to the spray device 3, and the spray device 3 sprays the external circulating water to the heat exchange area 13 to exchange heat with the internal circulating water of the heat exchange tube bundle.

[0042] This invention employs a cooling zone 12 formed within a closed tower body 1, and a spray cooling device 2 installed within the cooling zone 12. The spray cooling device 2 is connected to a water storage zone 11 via a first water pump 4. This allows the first water pump 4 to draw external circulating water from the water storage zone 11 and spray it onto the spray cooling device 2 for cooling, thereby ensuring the heat exchange effect between the external circulating water and the internal circulating water of the heat exchange tube bundle.

[0043] In some embodiments of this utility model, a partition 14 is provided between the water storage area 11 and the cooling area 12 and the heat exchange area 13. A water collection tank 61 and a clean water tank 62 are formed in the water storage area 11. The partition 14 is provided with a water inlet hole 141 that connects the cooling area 12 and the heat exchange area 13 with the water collection tank 61, so that the external circulating water after heat exchange in the heat exchange area 13 and the external circulating water after cooling in the cooling area 12 can pass through the partition 14 and collect in the water collection tank 61. The first water pump 4 is connected to the water collection tank 61, so that the first water pump 4 can draw external circulating water from the water collection tank 61. The second water pump 5 is connected to the clean water tank 62, so that the second water pump 5 can draw external circulating water from the clean water tank 62.

[0044] Furthermore, the water collection tank 61 and the clean water tank 62 are separated by an overflow plate 63, so that the external circulating water in the water collection tank 61 and the clean water tank 62 will not mix together. The height of the overflow plate 63 is lower than the height around the water collection tank 61 and the clean water tank 62, so that the external circulating water will not flow to the outside of the water collection tank 61 and the clean water tank 62, and the external circulating water in the water collection tank 61 can overflow into the clean water tank 62.

[0045] Furthermore, a first filter device 64 is provided at the upper end of the overflow plate 63 to filter the external circulating water overflowing from the water collection tank 61 into the clean water tank 62. In actual operation, the external circulating water after heat exchange in the heat exchange zone 13 and the external circulating water after cooling in the cooling zone 12 first collect in the water collection tank 61, and are then drawn by the first water pump 4 to the spray cooling device 2 for spray cooling. After overflowing and being filtered by the first filter device 64, it enters the clean water tank 62 for use by the second water pump 5.

[0046] This invention forms a water collection tank 61 and a clean water tank 62 within the water storage area 11, and connects both the cooling area 12 and the heat exchange area 13 to the water collection tank 61. A first water pump 4 is connected to the water collection tank 61, and a second water pump 5 is connected to the clean water tank 62. A first filter device 6 is installed at the upper end of the overflow plate 63 between the water collection tank 61 and the clean water tank 62. In practical use, the first water pump 4 can draw external circulating water from the water collection tank 61 for spray cooling, and both the external circulating water after heat exchange in the heat exchange area 13 and the external circulating water after cooling in the cooling area 12 can be collected in the water collection tank 61. The water tank 61 serves two purposes: it effectively cools the used external circulating water to ensure subsequent heat exchange efficiency, and it allows the used external circulating water to settle within the water tank 61, filtering out particulate matter and other impurities. Furthermore, the settled and cooled external circulating water overflows into the first filter device 6 and then into the clean water tank 62. This ensures the water quality of the external circulating water pumped by the second pump 5, preventing scale buildup on the surface of the heat exchange tube bundle after the external circulating water is sprayed onto it, thus guaranteeing the heat exchange performance of the heat exchange tube bundle.

[0047] In one specific embodiment of this utility model, the first filtration device 64 is a suspended solids filter screen installed on the upper end of the overflow plate 63. Since the water collection tank 61 can filter out heavier particulate sediments through sedimentation, the suspended solids filter screen installed on the upper end of the overflow plate 63 can filter out lighter suspended solids. Therefore, the combination of the water collection tank 61 and the first filtration device 64 effectively filters out impurities in the external circulating water.

[0048] In one specific embodiment of this utility model, the spray cooling device 2 includes a packing material 21 with a honeycomb structure and a spray pipe 22. The packing material 21 is disposed in the cooling area 12, and the spray pipe 22 is disposed above the packing material 21. The spray pipe 22 is connected to a first water pump 4 through a first conveying pipeline 23. During operation, the spray cooling device 2 pumps external circulating water from the water collection tank 61 to the spray pipe 22 via the first water pump 4. The spray pipe 22 then sprays the external circulating water onto the packing material 21. Simultaneously, external natural air is introduced from one side of the packing material 21 so that the external circulating water sprayed onto the packing material 21 can exchange heat with the external natural air, thereby reducing the temperature of the external circulating water.

[0049] In some embodiments of this utility model, a second filter device 51 is provided at the input end of the second water pump 5. By equipping the second water pump 5 with a second filter device 51, on the one hand, it can prevent the second water pump 5 from being blocked by foreign objects, and on the other hand, it can further improve the water quality of the external circulating water sprayed onto the heat exchange tube bundle, so as to further reduce the scaling on the surface of the heat exchange tube bundle.

[0050] In one specific embodiment of this utility model, the spraying device 3 includes a diversion pipe 31, a second conveying pipe 32, and nozzles 33. Several diversion pipes 31 are arranged from bottom to top within the heat exchange area 13, and each diversion pipe 31 is equipped with several nozzles 33. Each diversion pipe 31 is connected to a second water pump 5 via the second conveying pipe 32. During operation, the second water pump 5 draws external circulating water from the clean water tank 62 and delivers it to each diversion pipe 31 via the second conveying pipe 32. Finally, the external circulating water is sprayed onto the heat exchange tube bundle through the nozzles 33.

[0051] In one specific embodiment of this utility model, the nozzle 33 is a wide-angle fan-shaped nozzle, and the second water pump 5 is a high-pressure jet pump. This utility model, by using a wide-angle fan-shaped nozzle and a high-pressure jet pump to replace the traditional low-pressure splashing spray method, enables the formation of a thin water film that is more uniform, without dead angles, and thinner than the traditional low-pressure splashing method. Simultaneously, the jet flow rate is faster, with an impact splashing effect, which enhances heat exchange between air and external circulating water in the gaps of the heat exchange tube bundle. Furthermore, if dirt adheres to the outer surface of the heat exchange tube bundle, the sprayed external circulating water can also wash away the dirt.

[0052] Example 2

[0053] Please see Figures 1 to 5As shown, this utility model discloses a cooling tower 200, comprising a cooling water circulation system 100 and a heat exchange tube bundle 300. The specific structure and technical effects of the cooling water circulation system 100 are identical to those in Embodiment 1, and will not be repeated here. The heat exchange tube bundle 300 is vertically arranged within the heat exchange area 13, with a circulating water inlet 301 at its lower end and a circulating water outlet 302 at its upper end. The heat exchange tube bundle 300 may include several neatly arranged heat exchange plates, and diversion pipes 31 and nozzles 33 are provided between adjacent heat exchange plates and on both the front and rear sides of the entire heat exchange tube bundle 300, allowing the external circulating water to better cover the outer surface of the heat exchange tube bundle 300 and achieve a better heat exchange effect. In the specific operation of the cooling tower 200 of this utility model, since the circulating water inlet 301 is located at the lower end of the heat exchange tube bundle 300 and the circulating water outlet 302 is located at the upper end of the heat exchange tube bundle 300, the internal circulating water and the external circulating water are in a counter-current type, which can greatly improve the water-to-water heat exchange efficiency.

[0054] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Equivalent modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A cooling water circulation system, characterized in that: It includes a closed tower body, a spray cooling device, a spraying device, a first water pump, and a second water pump. The bottom of the closed tower body forms a water storage area, and a cooling area and a heat exchange area are formed above the water storage area inside the closed tower body; the spray cooling device is set in the cooling area, and the spray device is set in the heat exchange area; the input end of the first water pump is connected to the water storage area, and the output end of the first water pump is connected to the spray cooling device; the input end of the second water pump is connected to the water storage area, and the output end of the second water pump is connected to the spray device.

2. The cooling water circulation system as described in claim 1, characterized in that: A partition is provided between the water storage area and the cooling area and the heat exchange area. A water collection tank and a clean water tank are formed in the water storage area. Water inlet holes are provided on the partition to connect the cooling area and the heat exchange area with the water collection tank. The first water pump is connected to the water collection tank and the second water pump is connected to the clean water tank.

3. A cooling water circulation system as described in claim 2, characterized in that: The water collection tank and the clean water tank are separated by an overflow plate, the height of which is lower than the height around the water collection tank and the clean water tank.

4. A cooling water circulation system as described in claim 3, characterized in that: The upper end of the overflow plate is provided with a first filter device.

5. A cooling water circulation system as described in claim 4, characterized in that: The first filtration device is a suspended matter filter screen installed at the upper end of the overflow plate.

6. A cooling water circulation system as described in claim 1, characterized in that: The spray cooling device includes a packing material with a honeycomb structure and a spray pipe; the packing material is placed in the cooling area, the spray pipe is placed above the packing material, and the spray pipe is connected to a first water pump through a first delivery pipeline.

7. A cooling water circulation system as described in claim 1, characterized in that: The second water pump is equipped with a second filter device at its input end.

8. A cooling water circulation system as described in claim 1, characterized in that: The spraying device includes a diversion pipe, a second conveying pipe, and nozzles; several diversion pipes are arranged from bottom to top in the heat exchange area, and several nozzles are installed on each diversion pipe. Each diversion pipe is connected to a second water pump through the second conveying pipe.

9. A cooling water circulation system as described in claim 8, characterized in that: The nozzle is a wide-angle fan-shaped nozzle, and the second water pump is a high-pressure jet pump.

10. A cooling tower, characterized in that: It includes a cooling water circulation system and a heat exchange tube bundle as described in any one of claims 1-9; the heat exchange tube bundle is arranged vertically in the heat exchange area, and a circulating water inlet is provided at the lower end of the heat exchange tube bundle, and a circulating water outlet is provided at the upper end of the heat exchange tube bundle.

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