Automatic water replenishing device of closed cooling tower

Abstract

The utility model relates to the technical field of cooling towers, and discloses an automatic water replenishing device of a closed cooling tower, which comprises a cooling tower, a spraying water collecting tank is arranged at the bottom of the cooling tower, a water replenishing port of the spraying water collecting tank is connected with a cooling tower water replenishing pipe, and a water replenishing regulating valve and a flowmeter are arranged on the cooling tower water replenishing pipe. An outlet of the spraying water collecting tank is connected with a pollution discharge buffer tank through an outlet drain pipe; a U-shaped drainage pipe is arranged in the middle section of the outlet drainage pipe and is installed in an inverted U shape, the highest section of the U-shaped drainage pipe is connected with a vertically upward blow-down pipe and is flush with the highest liquid level of the spraying water collecting tank, and the blow-down pipe is higher than the spraying water collecting tank; a liquid level sensor interlocked with the water replenishing regulating valve is arranged in the pollution discharge buffer tank; and an outlet of the pollution discharge buffer tank is connected with a pollution discharge pipe with a pollution discharge pump.

Description

Technical Field

[0001] This utility model relates to the field of cooling tower technology, specifically to an automatic water replenishment device for a closed cooling tower. Background Technology

[0002] As the core equipment of industrial cooling systems, cooling towers dissipate heat through heat exchange between water and air. Their working principle encompasses three mechanisms: evaporative heat dissipation, convective heat transfer, and radiative heat transfer. After the cooling water comes into full contact with the air, some of the water vaporizes and absorbs heat, while the rest transfers heat to the atmosphere through convection and radiation, ultimately achieving the goal of lowering the water temperature.

[0003] like Figure 2 As shown, in a counter-flow closed-loop cooling tower, the spray collection tank at the bottom needs to be kept constantly full of circulating cooling water to maintain the water circulation between the spray collection tank 3, spray pump 8 (circulating cooling water pump), spray nozzles 7 (spray device), the outer wall of the coil 6, and the spray collection tank 3. During actual operation, the circulating cooling water continuously decreases due to evaporation losses, sewage discharge, and splashing. To ensure stable operation and maintain efficient heat exchange performance of the cooling tower, water needs to be replenished to the cooling tower tank in a timely manner to maintain a constant water level. However, in the existing production process, there is a significant water loss problem in the cooling tower tank, and the drop in water level affects the cooling effect. Currently, the main method relies on continuous manual monitoring of the cooling tower tank water level and manual replenishment. This real-time monitoring and manual replenishment method not only consumes a lot of manpower and increases operating costs, but also makes it difficult to achieve accurate water replenishment, affecting the stability and economy of the cooling system. Utility Model Content

[0004] This invention addresses a series of problems in the prior art, such as the need for regular water replenishment in cooling towers during operation, significant water loss from the cooling tower water tank during the production process, the need for constant manual monitoring of water levels and replenishment, which wastes manpower and resources and leads to increased costs. It provides an automatic water replenishment device for closed-loop cooling towers.

[0005] This utility model provides an automatic water replenishment device for a closed cooling tower, including a cooling tower, a spray water collection tank at the bottom of the cooling tower, a water inlet of the spray water collection tank connected to a cooling tower water replenishment pipe, the cooling tower water replenishment pipe (L1) connected to the Yellow River main water pipe (L5), a water replenishment regulating valve on the cooling tower water replenishment pipe, and the outlet of the spray water collection tank connected to a sewage buffer tank through an outlet drain pipe; a U-shaped drain pipe is provided in the middle section of the outlet drain pipe, the U-shaped drain pipe is installed in an inverted U shape, the highest section of the U-shaped drain pipe is connected to a vertically upward vent pipe, the highest section of the U-shaped drain pipe is level with the highest liquid level of the spray water collection tank, and the height of the vent pipe is higher than that of the spray water collection tank; a liquid level sensor interlocked with the water replenishment regulating valve is provided in the sewage buffer tank, and the outlet of the sewage buffer tank is connected to a sewage pipe with a sewage pump.

[0006] During implementation, the cooling tower is a counter-flow closed-loop cooling tower. The bottom of the cooling tower includes a spray water collection tank. The water inlet of the spray water collection tank is connected to the cooling tower's water supply pipe, which is connected to the Yellow River main water pipe, serving as the water source. A flow meter is installed on the Yellow River main water pipe, and a water supply regulating valve is installed on the cooling tower's water supply pipe. The outlet of the spray water collection tank is connected to a sewage buffer tank via an outlet drain pipe. A U-shaped drain pipe is installed in the middle of the outlet drain pipe, with the U-shaped drain pipe installed in an inverted U-shape. The highest section of the U-shaped drain pipe is connected to a vertically upward vent pipe, which is open to the atmosphere. The highest section of the U-shaped drain pipe is aligned with the highest liquid level in the spray water collection tank. The system maintains a level flow, ensuring overflow. Utilizing the siphon principle and atmospheric pressure balance, it precisely controls the drainage flow. As the liquid level in the spray collection tank rises, the liquid level in the U-shaped drain pipe remains the same as in the spray collection tank. The vent pipe is higher than the spray collection tank. The wastewater buffer tank is equipped with a level sensor interlocked with the water supply regulating valve. Specifically, the level sensor is connected to the control system, which in turn is connected to the water supply regulating valve. The water supply is adjusted based on the liquid level in the wastewater buffer tank to prevent the cooling tower's spray collection tank from emptying and to ensure the wastewater pump does not run dry. The outlet of the wastewater buffer tank is connected to a wastewater pipe with a wastewater pump.

[0007] Furthermore, to adapt to the production mode, several cooling towers are connected in parallel, and the Yellow River water main is connected to several cooling tower water supply pipes. Each cooling tower water supply pipe is connected to its own spray water collection tank; each spray water collection tank is connected to its own outlet drain pipe, and after convergence, they are connected to the sewage buffer tank.

[0008] During operation, this device effectively maintains a full water level in the spray collection tank, eliminating the need for manual water replenishment. The highest section of the U-shaped drain pipe is level with the highest liquid level in the spray collection tank, ensuring overflow. Once the water level in the cooling tower's spray collection tank exceeds the highest level, the U-shaped drain pipe automatically drains water into the wastewater buffer tank. A level sensor in the wastewater buffer tank transmits the level signal to the control system. The control system then sends an adjustment command to the water replenishment valve based on the liquid level, determining the amount of water to replenish based on the wastewater buffer tank level, thus maintaining a full water level in the spray collection tank. This effectively reduces the risk of the cooling tower emptying or overflowing due to inadequate personnel inspection.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The present invention provides an automatic water replenishment device for a closed cooling tower, which innovatively adopts a combination design of a water replenishment regulating valve that interlocks the liquid level of a U-shaped drain pipe and a sewage buffer tank, thus constructing a precise and efficient automatic water replenishment system.

[0011] The core operating principle of this device is based on the ingenious combination of liquid level sensing and mechanical linkage. A high-precision liquid level sensor is installed inside the wastewater buffer tank to monitor water level changes in real time. When the liquid level falls below a preset threshold, the sensor transmits a signal to the control system, triggering the automatic opening of the water supply regulating valve. The unique design of the U-shaped drain pipe utilizes the balance between the siphon principle and atmospheric pressure to precisely control the drainage flow. This design ensures that the water level in the cooling tower's water tank is always maintained within the optimal operating range, even in complex industrial environments.

[0012] From a structural design perspective, the layout of the components of this device is scientific and reasonable. The combination of the U-shaped drain pipe and the water supply regulating valve not only achieves automated water replenishment but also reduces the probability of failure by minimizing mechanical connection parts. The entire device is easy to install and can be seamlessly integrated into existing closed-loop cooling tower systems without requiring large-scale modifications to the original equipment, effectively extending the service life of the equipment.

[0013] Compared to traditional manual water replenishment methods, this device demonstrates significant technological advantages and economic value. Previously, manual inspections not only required substantial manpower but also suffered from long inspection intervals and human error, easily leading to cooling tower depletion or overflow, resulting in water waste and equipment damage. This automatic water replenishment device, through 24 / 7 real-time monitoring and intelligent control, completely eliminates the risks associated with inadequate manual inspections. Adopting this device greatly improves the stability and reliability of industrial cooling systems. Simultaneously, the automated operation mode significantly reduces manual operation, lowers labor costs, and achieves the goal of cost reduction and efficiency improvement for enterprises, demonstrating broad application prospects in the industrial production field. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of a counter-flow closed-loop cooling tower.

[0016] The diagram is labeled as follows: L1-Cooling tower water supply pipe, L2-Outlet drain pipe, L21-U-shaped drain pipe, L3-Sewage pipe, L4-Vent pipe, L5-Yellow River main water pipe; 1-Flow meter, 2-Water supply regulating valve, 3-Spray water collection tank, a-Water supply port, b-Outlet, 4-Sewage buffer tank, 5-Sewage pump, 6-Coil, 7-Spray head, 8-Spray pump. Detailed Implementation

[0017] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.

[0018] An automatic water replenishment device for a closed-loop cooling tower, such as Figure 1As shown in the figure, in this embodiment, the cooling towers are four sets connected in parallel, and then connected to the sewage buffer tank 4 after they converge.

[0019] The cooling tower is a counter-flow closed-loop cooling tower. The bottom of the cooling tower includes a spray collection tank 3. A flow meter 1 is installed on the Yellow River water main pipe L5. The Yellow River water main pipe L5 is connected to four cooling tower water supply pipes L1. The water supply inlet a of each spray collection tank 3 is connected to its respective cooling tower water supply pipe L1. A water supply regulating valve 2 is installed on the cooling tower water supply pipe L1. The outlet b of the spray collection tank 3 is connected to a sewage buffer tank 4 through an outlet drain pipe L2. That is, each spray collection tank 3 is connected to its own outlet drain pipe L2, and the outlet drain pipes L2 converge and connect to the sewage buffer tank 4. A U-shaped drain pipe L21 is installed in the middle section of water pipe L2. The U-shaped drain pipe L21 is installed in an inverted U shape. The highest section of the U-shaped drain pipe L21 is connected to a vertically upward vent pipe L4, which is open to the atmosphere. The highest section of the U-shaped drain pipe L21 is level with the highest liquid level of the spray water collection tank 3 to maintain overflow. By utilizing the siphon principle and the balance relationship with atmospheric pressure, the drainage flow rate is precisely controlled. When the liquid level in the spray water collection tank 3 rises, the liquid level height of the U-shaped drain pipe L21 is always the same as that of the spray water collection tank 3. The height of the vent pipe L4 is higher than that of the spray water collection tank 3.

[0020] The sewage buffer tank 4 is equipped with a liquid level sensor interlocked with the water supply regulating valve 2. Specifically, the liquid level sensor is connected to the control system, the control system is connected to the water supply regulating valve 2, and the control system is connected to the flow meter 1 to realize real-time monitoring of the flow rate in each cooling tower water supply pipe L1. The water supply volume is adjusted according to the liquid level of the sewage buffer tank 4 to prevent the cooling tower spray water collection tank 3 from emptying and to ensure that the sewage pump 5 will not be pumped out. The outlet of the sewage buffer tank 4 is connected to the sewage pipe L3 with the sewage pump 5.

[0021] During operation, this device effectively maintains the spray collection tank 3 at full water level, eliminating the need for manual water replenishment. The highest section of the U-shaped drain pipe L21 is level with the highest liquid level in the spray collection tank 3, ensuring overflow. Once the water level in the spray collection tank 3 exceeds the highest level, the U-shaped drain pipe L21 automatically drains water into the wastewater buffer tank 4. The liquid level sensor in the wastewater buffer tank 4 transmits the liquid level signal to the control system. The control system then sends an adjustment command to the water replenishment regulating valve 2 based on the liquid level, determining the amount of water replenishment according to the liquid level in the wastewater buffer tank 4 to maintain the spray collection tank 3 at full water level. This effectively reduces the risk of the cooling tower emptying or overflowing due to inadequate personnel inspection.

[0022] The scope of protection claimed by this utility model is not limited to the specific embodiments described above. Moreover, for those skilled in the art, this utility model can have various modifications and alterations. Any modifications, improvements, and equivalent substitutions made within the concept and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An automatic water replenishment device for a closed-loop cooling tower, comprising a cooling tower, wherein the bottom of the cooling tower includes a spray water collection tank (3), characterized in that: The water inlet (a) of the spray water collection tank (3) is connected to the cooling tower water supply pipe (L1), the cooling tower water supply pipe (L1) is connected to the Yellow River main water pipe (L5), and the cooling tower water supply pipe (L1) is equipped with a water supply regulating valve (2). The outlet (b) of the spray water collection tank (3) is connected to the sewage buffer tank (4) through the outlet drain pipe (L2); the middle section of the outlet drain pipe (L2) is equipped with a U-shaped drain pipe (L21), and the U-shaped drain pipe (L21) is oriented... The U-shaped drain pipe (L21) is installed in an inverted U-shape. The highest section of the U-shaped drain pipe (L21) is connected to a vertically upward vent pipe (L4). The highest section of the U-shaped drain pipe (L21) is level with the highest liquid level of the spray water collection tank (3). The height of the vent pipe (L4) is higher than that of the spray water collection tank (3). The sewage buffer tank (4) is equipped with a liquid level sensor that is interlocked with the water replenishment regulating valve (2). The outlet of the sewage buffer tank (4) is connected to a sewage pipe (L3) with a sewage pump (5).

2. The automatic water replenishment device for a closed-loop cooling tower according to claim 1, characterized in that: Several sets of cooling towers are connected in parallel.

3. The automatic water replenishment device for a closed cooling tower according to claim 2, characterized in that: The Yellow River water main pipe (L5) is equipped with a flow meter (1). The Yellow River water main pipe (L5) is connected to several cooling tower water supply pipes (L1). Each cooling tower water supply pipe (L1) is connected to its own spray water collection tank (3). Each spray water collection tank (3) is connected to its own outlet drain pipe (L2), and after convergence, it is connected to the sewage buffer tank (4).

4. The automatic water replenishment device for a closed cooling tower according to claim 1, characterized in that: The liquid level sensor is connected to the control system, and the control system is connected to the water supply regulating valve (2).

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