Anti-cavitation settling device for evaporative cooling condenser

Abstract

The utility model belongs to evaporative cooling condenser technical field discloses a kind of anti-cavitation settling device for evaporative cooling condenser, including water tank, water tank bottom is connected by flange and is settled in the water inlet of pool, and filter screen is arranged at the water inlet of pool, and the bottom of pool is equipped with blowdown, and blowdown ball valve is arranged at blowdown, and water outlet pipe is arranged in one side in the middle lower part of pool, and water outlet pipe is connected the water inlet of water pump by pump front pipeline, and the water outlet pipe of other end of water pump is connected with pump rear pipeline, and pump rear pipeline terminal is set in the top of cooler, and pool and water pump are set on the base of water tank bottom;The utility model solves the problem of equipment ultra-wide and ultra-limit, ensures the treatment effect of evaporative cooling condenser, the pool can store a small amount of water to improve the liquid level height before pump, reduce steel structure, also make the static pressure of pipeline before pump sufficient, meet the selection requirement of conventional water pump.

Description

Technical Field

[0001] This utility model belongs to the technical field of evaporative cooling condensers, specifically relating to an anti-cavitation sedimentation device for evaporative cooling condensers. Background Technology

[0002] Evaporative cooling condensers utilize the heat absorption of evaporating sprayed water to remove heat from the medium, thereby bringing the medium to the desired temperature. A circulating water tank and pump are located at the bottom. The pump lifts and delivers the circulating water to the spray system, where it is sprayed onto the heat exchange module walls to form a water film. Under the action of a fan, the water film evaporates, absorbing heat and removing heat from the target medium. However, this equipment relies on the circulating water tank for storage and the pump for lifting, and its high integration means the pump is typically placed on the side of the tank. Due to the low tank height and shallow water level, the static pressure at the pump inlet is low, making the pump prone to cavitation. This is especially true at high altitudes where the saturated vapor pressure is low, increasing the risk of cavitation. The hazards of pump cavitation include mechanical damage, performance degradation, and increased noise and vibration in the overall equipment.

[0003] Existing anti-cavitation measures mainly include: increasing the height of the circulating water tank at the bottom of the equipment to increase the static pressure before the pump; increasing the diameter of the suction pipe and reducing the resistance loss before the pump due to pipeline accessories; and selecting a water pump with a high required net positive suction head (NPSH) to avoid pump cavitation. However, these measures often have the following design flaws: 1. The water tank is low in height and the liquid level is shallow. The static pressure at the water pump inlet is usually less than 0.5m, resulting in a low effective net positive suction head (NPSH) for the device. A certain safety margin (usually ≥0.5m) needs to be maintained when selecting equipment. However, conventional water pumps from manufacturers often do not have such a low required NPSH, which places stringent requirements on pump selection. Customization is usually necessary, resulting in high equipment costs.

[0004] 2. Increasing the height and level of the circulating water tank to avoid pump cavitation adds more steel structure and stores more water, thus increasing the operating load on the equipment. Since evaporative cooling condensers are usually placed on the top floor of brick-concrete or steel-structured factory buildings, the excessive weight of the equipment will place higher load requirements on the factory structure, increasing investment costs.

[0005] 3. Placing the circulating water pump on the side of the equipment increases the suction pipe diameter, making piping difficult and increasing the overall dimensions, resulting in equipment exceeding width and size limits and causing transportation difficulties. Reducing the structural width of the evaporative cooling condenser to control its dimensions would affect the cooling efficiency. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides an anti-cavitation settling device for evaporative cooling condensers, which effectively avoids cavitation reactions in water pumps and optimizes the equipment structure.

[0007] The technical solution adopted by this utility model is: an anti-cavitation settling device for an evaporative cooling condenser, including a water tank, the bottom of the water tank is connected to the water inlet of the settling tank through a flange, a filter screen is installed at the water inlet of the settling tank, a sewage outlet is provided at the bottom of the settling tank, a sewage ball valve is installed at the sewage outlet, a water outlet pipe is provided on one side of the lower part of the settling tank, the water outlet pipe is connected to the water inlet of the water pump through a pre-pump pipe, the water outlet pipe at the other end of the water pump is connected to a post-pump pipe, the end of the post-pump pipe is set at the top of the cooler, and the settling tank and the water pump are set together on the base at the bottom of the water tank.

[0008] The sedimentation tank is cylindrical or square, with a nominal diameter of 50-2000mm and a height of 200-2000mm. The sedimentation tank is made of non-metallic materials such as fiberglass or metallic materials such as carbon steel, aluminum alloy, and stainless steel.

[0009] A water collection pit is provided at the connection between the water tank and the inlet of the sedimentation tank.

[0010] The materials for the pre-pump and post-pump pipelines are non-metallic materials such as fiberglass and PVC, or metallic materials such as carbon steel, aluminum alloy, and stainless steel.

[0011] The drain ball valve is made of PVC, carbon steel, or stainless steel.

[0012] The outlet pipe is connected to the pipeline before the pump via a flange, and the diameter of the outlet pipe is greater than or equal to the diameter of the pipeline before the pump.

[0013] The beneficial effects of this utility model are as follows: This invention features a sludge discharge ball valve at the bottom of the sedimentation tank for sludge discharge and low-point drainage. The water pump and sedimentation tank are located together at the bottom of the water tank, reducing the pipeline length between the sedimentation tank and the water pump, lowering the resistance loss before the pump, solving the problem of equipment exceeding width and limits while ensuring the treatment effect of the evaporative cooling condenser. The sedimentation tank and the water tank are connected by a flange, which facilitates disassembly and maintenance. A filter screen is installed on the inlet side of the sedimentation tank to prevent large particles of impurities from falling into the sedimentation tank. The sedimentation tank can store a small amount of water to increase the liquid level before the pump, reducing the steel structure and ensuring sufficient static pressure in the pipeline before the pump, meeting the selection requirements of conventional water pumps. The height of the pipeline before the pump is higher than the bottom of the sedimentation tank, which allows large debris or heavier suspended solids in the water to settle locally, preventing them from entering the pipeline before the pump and causing blockages. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] The markings in the diagram are: 1. Water tank; 11. Sump; 2. Sedimentation tank; 21. Filter screen; 22. Sewage ball valve; 23. Outlet pipe; 3. Water pump; 31. Pipe before pump; 32. Pipe after pump; 4. Base. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0017] As shown in the figure, an anti-cavitation settling device for an evaporative cooling condenser includes a water tank 1. The bottom of the water tank 1 is connected to the inlet of a settling tank 2 via a flange. A sump 11 is provided at the connection between the water tank 1 and the inlet of the settling tank 2. The settling tank 2 is cylindrical with a nominal diameter of 1500 mm and a height of 1500 mm. The settling tank 2 is made of fiberglass. A filter screen 21 is installed at the inlet of the settling tank 2. A drain outlet is provided at the bottom of the settling tank 2, and a drain ball valve 22 is installed at the drain outlet. A settling valve is provided on one side of the lower part of the settling tank 2. There is an outlet pipe 23, which is connected to the inlet of the water pump 3 through the pre-pump pipe 31. The outlet pipe 23 at the other end of the water pump 3 is connected to the post-pump pipe 32. The end of the post-pump pipe 32 is set on the top of the cooler. The sedimentation tank 2 and the water pump 3 are set together on the base 4 at the bottom of the water tank 1. The pre-pump pipe 31 and the post-pump pipe 32 are made of stainless steel. The drain ball valve 22 is made of carbon steel. The outlet pipe 23 is connected to the pre-pump pipe 31 through a flange. The diameter of the outlet pipe 23 is greater than or equal to the diameter of the pre-pump pipe 31.

[0018] This evaporative cooling condenser uses an anti-cavitation settling device. During use, water in the water tank 1 enters the settling tank 2 through the filter screen 21. The water then passes through the pre-pump pipe 31 and is pumped by the water pump 3 into the post-pump pipe 32. From there, it is pumped into the top of the evaporative cooling condenser and falls back into the water tank 1, forming a water circulation. Wastewater accumulated in the settling tank 2 is periodically discharged using the drain ball valve 22. Quick disassembly is achieved through the flange between the water tank 1 and the settling tank 2, allowing for cleaning of the filter screen 21 and maintenance of the settling tank 2. This utility model has a simple structure and is easy to use. It solves the problem of equipment exceeding width and limits while ensuring the treatment effect of the evaporative cooling condenser. The settling tank 2 can store a small amount of water to increase the liquid level before the pump, reducing the steel structure and ensuring sufficient static pressure in the pre-pump pipe 31 to meet the selection requirements of conventional water pump 3. The height of the pre-pump pipe 31 is higher than the bottom of the settling tank 2, allowing large impurities or heavier suspended solids in the water to settle locally, preventing them from entering the pre-pump pipe 31 and the water pump 3 and causing blockages.

Claims

1. A cavitation-resistant settling device for an evaporative cooling condenser, comprising a water tank (1), characterized in that: The bottom of the water tank (1) is connected to the inlet of the sedimentation tank (2) via a flange. A filter screen (21) is installed at the inlet of the sedimentation tank (2). A drain outlet is provided at the bottom of the sedimentation tank (2). A drain ball valve (22) is installed at the drain outlet. A water outlet pipe (23) is installed on one side of the lower part of the sedimentation tank (2). The water outlet pipe (23) is connected to the inlet of the water pump (3) via the pre-pump pipe (31). The water outlet pipe (23) at the other end of the water pump (3) is connected to the post-pump pipe (32). The end of the post-pump pipe (32) is located at the top of the cooler. The sedimentation tank (2) and the water pump (3) are installed together on the base (4) at the bottom of the water tank (1).

2. The anti-cavitation sedimentation device for evaporative cooling condensers according to claim 1, characterized in that: The sedimentation tank (2) is cylindrical or square, with a nominal diameter of 50-2000mm and a height of 200-2000mm. The sedimentation tank (2) is made of fiberglass non-metallic material or carbon steel, aluminum alloy, or stainless steel.

3. The anti-cavitation sedimentation device for evaporative cooling condensers according to claim 1, characterized in that: A water collection pit (11) is provided at the connection between the water tank (1) and the inlet of the sedimentation tank (2).

4. The anti-cavitation sedimentation device for evaporative cooling condensers according to claim 1, characterized in that: The materials of the pre-pump pipe (31) and the post-pump pipe (32) are fiberglass, PVC non-metallic materials or carbon steel, aluminum alloy, stainless steel metallic materials.

5. The anti-cavitation sedimentation device for evaporative cooling condensers according to claim 1, characterized in that: The drain ball valve (22) is made of PVC, carbon steel or stainless steel.

6. The anti-cavitation sedimentation device for evaporative cooling condensers according to claim 1, characterized in that: The outlet pipe (23) is connected to the pump inlet pipe (31) via a flange, and the diameter of the outlet pipe (23) is greater than or equal to the diameter of the pump inlet pipe (31).

Images