A dynamic testing device for cooling tower water distribution uniformity

Abstract

This utility model discloses a dynamic testing device for the uniformity of water distribution in cooling towers, belonging to the field of cooling tower performance testing technology. Several adjacent water distribution plates are arranged above the bottom plate of the water tank, with partitions between adjacent water distribution plates. The two ends of the partitions are sealed to the side plates of the water tank. The partitions, side plates, and water distribution plates constitute several independent water distribution testing units. Each water distribution testing unit is equipped with a nozzle, which is connected to a circulating water system. The bottom plate of the water tank has return water holes, which are connected to the circulating water system through an anti-vortex mechanism. The advantages of this utility model are: the entire testing system can be made into a circulating system; the testing time is no longer limited by the water storage space; dynamic testing can be performed when the system is running stably, avoiding the impact of system instability during startup and shutdown on the test.

Description

Technical Field

[0001] This utility model relates to a dynamic testing device for the uniformity of water distribution in a cooling tower, belonging to the field of cooling tower performance testing technology. Background Technology

[0002] When a cooling tower is operating, circulating water is distributed through a water distribution tank or pipes to various spray branches, and then from these branches to the spray nozzles on the tower. Finally, the nozzles spray the water onto the packing material. When external cold air comes into contact with the circulating water on the packing, the temperature of the circulating water is reduced. Currently, almost all cooling tower packing materials are made of modified PVC sheets. Although the sizes of the packing materials used differ, the heat exchange rate per unit volume of packing material is not significantly different under the same energy consumption conditions. In fact, the development of packing materials has reached an industry bottleneck. At this point, the uniformity of water distribution in the water distribution system will greatly affect the cooling efficiency of the cooling tower, making the testing of water distribution uniformity crucial.

[0003] Currently, the uniformity of water distribution in cooling towers is mainly assessed by measuring the amount of water flowing from each nozzle. During testing, multiple water tanks are used to collect the water sprayed from the nozzles. However, due to limited water storage space, the testing time is short, and the entire testing system is unstable during startup and shutdown, making it impossible to accurately test the uniformity of water distribution.

[0004] Current methods for testing water distribution uniformity primarily involve measuring the water output from each nozzle. For example, the method disclosed in CN116380516A uses a moving water collection unit to collect water flow at different locations and calculates a uniformity coefficient to assess uniformity. However, this type of method is limited by the water storage space, has a short testing time, and struggles to capture dynamic changes. Furthermore, the issue of system instability during start-up and shutdown remains unresolved, leading to insufficient data accuracy. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a dynamic testing device for the uniformity of water distribution in cooling towers. By changing the testing method for water distribution uniformity, the entire testing system is made into a recirculating system. The testing time is no longer limited by the water storage space, and online testing can be performed when the system is running stably, thereby greatly improving the accuracy of water distribution uniformity testing.

[0006] The technical solution of this utility model is: a dynamic testing device for the uniformity of water distribution in a cooling tower, comprising a water tank, several adjacent water distribution plates arranged above the bottom plate of the water tank, a partition plate arranged between adjacent water distribution plates, the two ends of the partition plate being sealed and connected to the side plate of the water tank, the partition plate, the side plate of the water tank and the water distribution plates constituting several independent water distribution testing units, each water distribution testing unit being provided with a nozzle above it, the nozzle being connected to a circulating water system, the bottom plate of the water tank being provided with a return water hole, the return water hole being connected to the circulating water system through an anti-vortex mechanism.

[0007] Each adjacent water distribution plate has the same size and the same number of water distribution holes.

[0008] The circulating water system includes several spray branch pipes connected to the nozzles. The inlet end of the spray branch pipe is connected to the water distribution tank. The water distribution tank is connected to the inlet pipe. The inlet pipe is equipped with a regulating valve. The circulating water pump is connected to the inlet pipe and the return pipe. The return pipe is connected to the return hole at the bottom plate of the water tank.

[0009] The bottom of the water tank base plate is provided with a support block for support.

[0010] The spray branch pipe is fixed to the top of the partition plate by U-bolts.

[0011] The anti-vortex mechanism includes a top plate and perforated side plates, with the perforated side plates facing each other in pairs. The top plate is fixed to the top of the perforated side plates, and the perforated side plates and the perforated plates together form a square structure, which is fixed at the return water hole.

[0012] The side panel of the water tank is a transparent panel.

[0013] The beneficial effects of this utility model include: (1) Since the circulating water pump is equipped with a regulating valve, an inlet pipe and a return pipe, the entire test system can be made into a circulating system. The test time is no longer limited by the water storage space. Dynamic testing can be carried out when the system is running stably, avoiding the impact of system instability on the test during startup and shutdown.

[0014] (2) Because the readable liquid level distribution plate has a certain number of small holes, after the system is running stably, the spraying status of the nozzle can be directly observed, the operating water level of the distribution plate can be directly measured, and the flow rate can be inferred from the water level. The test results are more in line with the actual situation and more accurate.

[0015] (3) Because the top of the return water pipe is equipped with an anti-vortex device, it can prevent air from entering the circulating water pump during the experiment, ensuring the stable operation of the system and extending the life of the water pump; the outlet of the circulating water pump is equipped with a regulating valve, which can be used to test the water distribution under different flow rates by adjusting different circulating water flow rates. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the present invention.

[0017] The attached figures are labeled as follows: 1. Circulating water pump; 2. Regulating valve; 3. Inlet pipe; 4. Return pipe; 5. Distributor tank; 6. Spray branch pipe; 7. Spray head; 8. U-bolt; 9. Side plate of water tank; 10. Bottom plate of water tank; 11. Partition plate; 12. Water distribution plate; 13. Anti-vortex mechanism; 14. Support block. Detailed Implementation

[0018] The following is in conjunction with the appendix Figure 1 Further explanation of this utility model: Example A dynamic testing device for the uniformity of water distribution in a cooling tower includes a water tank. Above the bottom plate 10 of the water tank are several adjacent water distribution plates 12. A partition 11 is provided between adjacent water distribution plates 12. Both ends of the partition 11 are sealed to the side plates 9 of the water tank. The partition 11, the side plates 9, and the water distribution plates 12 constitute several independent water distribution testing units. Each water distribution testing unit is equipped with a nozzle 7. The water distribution plates 12 in each water distribution testing unit are of the same size and have the same number of water distribution holes to ensure the accuracy of the water distribution test results. The nozzle 7 is connected to a spray branch pipe 6. The inlet end of the spray branch pipe 6 is connected to a water distribution tank 5. The water distribution tank 5 is connected to an inlet pipe 3. A regulating valve 2 is provided on the inlet pipe for circulating water. Pump 1 is connected to inlet pipe 3 and return pipe 4. Return pipe 4 is connected to the return hole of bottom plate 10 of water tank. Bottom plate 10 of water tank is provided with return hole. Return hole is connected to the circulating water system through anti-vortex mechanism 13. Anti-vortex mechanism 13 includes top plate and perforated side plate. The perforated side plate is opposite to each other. Top plate is fixed to the top of perforated side plate. Perforated side plate and perforated plate together form a square structure. The square structure is fixed at return hole. Circulating water enters return hole from perforated side plate around square structure. The top plate blocks the flow of water directly into return hole from above, thus preventing the formation of vortex at return hole and preventing air from entering circulating water pump 1 with vortex.

[0019] The bottom of the water tank base plate 10 is provided with a support block 14 for support. The support block 14 supports the water tank and leaves room for the return water pipe 4 at the bottom of the water tank, so that the return water pipe 4 can be smoothly connected from the bottom of the water tank to the water tank base plate 10.

[0020] To ensure the stability of the spray branch pipe 6 and to ensure that the spray direction of the nozzles 7 on the spray branch pipe 6 remains downward, the spray branch pipe 6 is fixed to the top of the partition plate 11 with U-bolts 8 so that the spray branch pipe 6 will not rotate at will.

[0021] The side panel 9 of the water tank is transparent to facilitate the observation of the real-time liquid level by staff. When the liquid level is not discernible to the naked eye, a measuring ruler can be used for more accurate measurement.

[0022] The process of conducting testing using this utility model is as follows: First, the circulating water is added to the water tank according to the calculated volume. The circulating water pump 1 is turned on. The circulating water volume of the system can be changed by adjusting valve 2. The circulating water enters the water distribution tank 5 through the inlet pipe 3. The water distribution tank 5 distributes the circulating water into the spray branch pipe 6. After the circulating water enters the spray branch pipe 6, the nozzles 7 will start spraying. The spray water falls into the readable liquid level distribution plate 12. After the water level of the readable liquid level distribution plate 12 stabilizes, the water level can be read. The flow rate of each nozzle 7 can be inferred from the water level. The circulating water flows through the small holes on the readable liquid level distribution plate 12 into the bottom plate 10 of the water tank, then flows into the return water pipe 4 through the anti-vortex device 13, and finally returns to the circulating water pump 1, realizing the circulation of the entire system.

[0023] By making the entire testing system a circulating system, the testing time is no longer limited by the water storage space. When the system is running stably, the flow rate of each nozzle is dynamically monitored online at different circulating water flow rates, and the spraying status of each nozzle can be seen intuitively. This avoids the impact of system instability during startup and shutdown on the test, thereby greatly improving the accuracy of the water distribution uniformity test.

[0024] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A dynamic testing device for the uniformity of water distribution in a cooling tower, characterized in that, The system includes a water tank, with several adjacent water distribution plates (12) above the bottom plate (10) of the water tank. A partition (11) is provided between adjacent water distribution plates (12). The two ends of the partition (11) are sealed and connected to the side plate (9) of the water tank. The partition (11), the side plate (9) of the water tank, and the water distribution plates (12) constitute several independent water distribution test units. Each water distribution test unit is provided with a nozzle (7) above it. The nozzle (7) is connected to the circulating water system. The bottom plate (10) of the water tank is provided with a return water hole. The return water hole is connected to the circulating water system through an anti-vortex mechanism (13).

2. The dynamic testing device for the uniformity of cooling tower water distribution according to claim 1, characterized in that, Each adjacent water distribution plate (12) has the same size and the same number of water distribution holes.

3. The dynamic testing device for the uniformity of water distribution in a cooling tower according to claim 1, characterized in that, The circulating water system includes several spray branch pipes (6) connected to the nozzle (7). The inlet end of the spray branch pipe (6) is connected to the water distribution tank (5). The water distribution tank (5) is connected to the water inlet pipe (3). The water inlet pipe (3) is equipped with a regulating valve (2). The circulating water pump (1) is connected to the water inlet pipe (3) and the return water pipe (4). The return water pipe (4) is connected to the return water hole of the bottom plate (10) of the water tank.

4. The dynamic testing device for the uniformity of cooling tower water distribution according to claim 1, characterized in that, The bottom of the water tank bottom plate (10) is provided with a support block (14) for support.

5. The dynamic testing device for the uniformity of cooling tower water distribution according to claim 3, characterized in that, The spray branch pipe (6) is fixed to the top of the partition plate (11) by U-bolts (8).

6. The dynamic testing device for the uniformity of water distribution in a cooling tower according to claim 1, characterized in that, The anti-vortex mechanism (13) includes a top plate and perforated side plates. The perforated side plates are opposite each other, and the top plate is fixed to the top of the perforated side plates. The perforated side plates and the perforated plates together form a square structure, which is fixed at the return water hole.

7. The dynamic testing device for the uniformity of water distribution in a cooling tower according to claim 1, characterized in that, The side panel (9) of the water tank is a transparent panel.

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