A cooling device for a circulating cooling water system

Abstract

The present invention relates to a cooling device for a circulating cooling water system, comprising a lower water trough and an upper water trough, wherein the lower water trough is placed on the ground, and the upper water trough is fixedly installed above the lower water trough by a support frame, and a layer of porous cooling plates is fixedly installed in the air above the lower water trough, and several layers of porous cooling plates are fixedly installed in the air above the upper water trough, and the porous cooling plates are all provided with leakage holes, and the edge side walls of the leakage holes are all convex upwards, and the circulating water to be cooled is first pre-cooled by the porous cooling plates above the lower water trough, and then transported to the top of the porous cooling plates above the upper water trough through the upper water system for secondary cooling, and the final cooling water in the upper water trough is then re-transported to the circulating cooling water system. The cooling device of the present invention has high cooling efficiency, can be operated intermittently, has low equipment energy consumption, and significantly reduces the scaling problem of the heat exchanger pipeline by the circulating water without using any scale inhibitors, is energy-saving and environmentally friendly, and greatly reduces operating costs.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment and cooling equipment, and in particular to a cooling device for a circulating cooling water system used in the industrial field. Background Art

[0002] In the industrial field, circulating cooling water systems for cooling production equipment and reaction materials typically use cooling towers as cooling devices, which utilize heat exchange with air to cool the water to be cooled in the cooling tower. Existing cooling towers are mostly suitable for circulating cooling water systems that process large amounts of water and are relatively expensive. For small and medium-sized production enterprises and circulating cooling water systems that process relatively small amounts of water, their costs are relatively high, significantly affecting the efficiency of the enterprises. In addition, during use, the cooling towers contain a large number of energy-consuming devices for promoting medium flow and heat exchange, and they operate continuously. For circulating cooling water systems where the amount of water to be cooled changes intermittently, the cooling towers consume a lot of energy when in continuous operation, and cannot be started and operated intermittently according to the intermittent changes in the amount of water to be processed. This will result in a lot of energy waste, further increasing the production costs of small and medium-sized enterprises.

[0003] Due to energy conservation and environmental protection requirements, most circulating cooling water volumes are small, the water flow rate in intermittent circulating cooling water systems is slow, and the circulating water pipelines for the equipment to be cooled are relatively narrow, resulting in a high risk of scaling, clogging, and corrosion in the pipelines. Regular cleaning of the circulating cooling water system and heat exchanger pipelines is required, and cleaning of the heat exchanger pipelines is not only time-consuming and labor-intensive but also prone to damage, significantly increasing the workload and costs of the enterprise. To solve the problem of pipeline scaling, people usually add scale and corrosion inhibitors to the circulating water. However, the use of scale and corrosion inhibitors also increases enterprise costs. In addition, the dosing operation not only increases the process, but the appropriate dosage will directly affect the scale and corrosion inhibition effect. Improper use will still cause damage to the circulating cooling water system, cooling equipment, and production equipment. In addition, the addition of scale inhibitors is prone to pollution for melt extrusion materials, which is not the best choice for the melt extrusion modification industry.

[0004] Therefore, there is an urgent need for technical solutions that can reduce scale buildup in the heat exchanger piping of circulating cooling water systems in production equipment without the use of scale inhibitors. For small and medium-sized enterprises and those with intermittently varying water volumes, there is a need for a more cost-effective and energy-efficient cooling device. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a cooling device for a circulating cooling water system, which has a simple structure and low cost. It adopts an ingenious design concept. While effectively cooling, it reduces power consumption and can significantly reduce scaling of the heat exchanger pipelines of production equipment without the use of scale inhibitors, thereby optimizing the process and saving production costs for enterprises.

[0006] The technical solution adopted by the present invention is: a cooling device for a circulating cooling water system, comprising a lower water trough and an upper water trough with an opening at the top, and a support frame for fixing the upper water trough above the lower water trough, a spacing distance being set between the lower water trough and the upper water trough, a mounting frame being fixedly set above the lower water trough and the upper water trough, and a layer of porous cooling plates being fixedly mounted in the air above the lower water trough by the mounting frame, and a plurality of layers of porous cooling plates being fixedly mounted in the air above the upper water trough by the mounting frame;

[0007] The porous cooling plate is provided with a plurality of water leakage holes, the edges of the water leakage holes are raised 1-3 mm from the top surface of the porous cooling plate, and the diameter of the water leakage holes is 1-2 mm;

[0008] A water supply system is also connected between the lower water tank and the upper water tank.

[0009] As a further limitation of the above technical solution, a first water inlet is provided on the top of the porous cooling plate above the lower water tank, the first water inlet is connected to the hot water output port of the circulating cooling water system, and a first water outlet is provided at the bottom of the side wall of the lower water tank;

[0010] A second water inlet is provided on the top of the multi-layer porous cooling plate above the upper water tank, and a second water outlet is provided at the bottom of the side wall of the upper water tank, and the second water outlet is connected to the cold water input port of the circulating cooling water system;

[0011] The water supply system is connected between the first water outlet of the lower water tank and the second water inlet of the upper water tank.

[0012] As a further limitation of the above technical solution, a liquid level indicator tube is mounted on the exterior sidewall of the upper water tank to monitor changes in the water level within the upper water tank. A water replenishment port is also provided on the sidewall of the upper water tank, which is connected to an external primary water supply port. When the water level in the upper water tank is too low, primary water can be replenished into the upper water tank through the external water supply port to ensure the required water volume in the circulating cooling water system.

[0013] As a further limitation of the above technical solution, there are three to five layers of porous cooling plates above the upper water trough, and the interval between two adjacent layers of porous cooling plates is 0.1-0.2m. The distance between the lowest layer of porous cooling plates and the top surface of the upper water trough is 1-2m. This size can ensure that the water pouring from the porous cooling plates can fully exchange heat with the surrounding cold air to ensure the cooling effect.

[0014] As a further limitation of the above technical solution, the porous cooling plates are all made of aluminum sheet tile plates or aluminum sheet flat plates.

[0015] As a further limitation of the above technical solution, the porous cooling plates are all inclined with an inclination angle of 2-5 degrees. The first water inlet is close to the higher end of the porous cooling plate above the lower water tank, and the second water inlet is close to the higher end of the porous cooling plate above the upper water tank.

[0016] As a further limitation of the above technical solution, the water supply system includes a water pump, which is fixedly installed on the support frame. The water inlet port of the water pump is connected to the first water outlet through a pipe, and a filter is provided in the lower water tank and at the first water outlet. The filter can prevent solid impurities and large scale in the water tank from entering the water pump or the upper water tank, thereby preventing the pipes in the water supply system from being blocked; the water outlet port of the water pump is connected to the second water inlet through a pipe.

[0017] As a further limitation of the above technical solution, a first overflow port and a first discharge port are further provided on the side wall of the lower water tank, and the first overflow port is located at the top of the side wall of the lower water tank, and the first discharge port is located at the bottom of the side wall of the lower water tank; a second overflow port and a second discharge port are further provided on the side wall of the upper water tank, and the second overflow port is located at the top of the side wall of the upper water tank, and the second discharge port is located at the bottom of the side wall of the upper water tank.

[0018] After long-term use, scale deposits will form at the bottom of the lower sink and the upper sink. When the scale accumulates to a certain amount, the lower sink and the upper sink need to be cleaned. The sewage generated after cleaning is discharged through the first discharge port and the second discharge port respectively; when the water storage volume in the lower sink and the upper sink is too large and exceeds the position of the first overflow port and the second overflow port, it is discharged through the first overflow port and the second overflow port respectively.

[0019] As a further limitation of the above technical solution, the lower water trough is fixedly placed on the ground, the upper water trough and the lower water trough are vertically distributed up and down, and the distance between the bottom surface of the upper water trough and the top surface of the lower water trough is 1-1.5m.

[0020] As a further limitation of the above technical solution, the water leakage holes are neatly arranged on the porous cooling plate, the distance between two adjacent water leakage holes in each row is 10±1 mm, and the water leakage holes in two adjacent columns are staggered.

[0021] Using this technology, during the cooling process of circulating water flowing from the heat exchanger pipes of production equipment, circulating water with a smaller flow rate or intermittent output is pre-cooled through the lower water tank and accumulated in the lower water tank. When the liquid level in the lower water tank reaches a certain height, the water pump is activated to pump the pre-cooled water to the upper water tank for secondary cooling, thereby improving the cooling effect of the circulating water. In this way, the cooling device of the present invention is not only suitable for circulating cooling water systems with small circulating water volumes or those requiring intermittent circulating cooling, but also, because the cooling device of the present invention can operate intermittently, the equipment has low energy consumption and significantly saves operating costs.

[0022] The present invention provides a porous cooling plate above the lower water tank and the upper water tank as the main cooling structure, effectively utilizing the distribution process of water flow on the porous cooling plate and the water spraying process through the water leakage holes to achieve sufficient heat exchange between the circulating water and the cold air, thereby achieving the purpose of efficient cooling of the circulating water. The cooling process is highly efficient, energy-saving and environmentally friendly, and further reduces operating costs.

[0023] The water temperature in the lower water tank of the cooling device of the present invention is relatively high, and the circulating water accumulates for a long time, which can promote the scale precipitation of scaling ions in the circulating water and significantly reduce the concentration of scaling ions in the water; although the temperature in the upper water tank drops significantly, scaling will still continue to form to reduce scaling ions in the water, and the circulating water finally returns to the circulating cooling water system, and its scaling ion content is greatly reduced, thereby effectively reducing scaling and blockage of the heat exchanger pipelines of the circulating water in the production equipment without using any scale inhibitors.

[0024] In summary, the cooling device for the circulating cooling water system of the present invention has a simple structure, is easy to install, and has a low equipment cost. It can meet the circulating water cooling needs of the circulating water system with a small amount of circulating water or an intermittent circulating cooling water system, and can significantly reduce the scaling of the circulating water in the heat exchanger pipeline without using any scale inhibitors and corrosion inhibitors. For small and medium-sized enterprises, it not only has high cooling efficiency, energy saving and environmental protection, but also has high practicality and use value. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the overall structure of the cooling device for a circulating cooling water system according to the present invention;

[0026] Figure 2 for Figure 1 A magnified view of the local structure at point A.

[0027] In the figure: 1-lower water tank; 101-first water inlet; 102-first water outlet; 103-first overflow port; 104-first discharge port; 2-upper water tank; 201-second water inlet; 202-second water outlet; 203-second overflow port; 204-second discharge port; 205-water supply port; 3-support frame; 4-porous cooling plate; 401-leakage hole; 5-water pump; 6-mounting block; 7-liquid level indicator tube. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1 As shown, the cooling device for a circulating cooling water system includes a lower water tank 1 and an upper water tank 2 with an opening at the top, and a support frame 3 for fixing the upper water tank 2 above the lower water tank 1. A mounting frame 6 is fixedly provided on the side walls of the lower water tank 1 and the upper water tank 2. Through the mounting frame 6, porous cooling plates 4 are fixedly installed in the air above the lower water tank 1 and the upper water tank 2. Generally, the porous cooling plates are placed at the center above the upper and lower water tanks, wherein a layer of porous cooling plates 4 is provided above the lower water tank 1, and a total of three layers of porous cooling plates 4 are stacked up and down above the upper water tank 2. The interval between two adjacent layers of porous cooling plates 4 is 0.1-0.2m, and the distance between the bottom layer of porous cooling plates 4 and the top surface of the upper water tank 2 is 1-2m. Each porous cooling plate 4 can be installed horizontally or in an inclined state. In this embodiment, the inclination angle of the porous cooling plates 4 is 2-5 degrees. The tilted porous cooling plate 4 can disperse the water flow as much as possible on the plate surface and flow as far as possible to increase the contact area and contact time between the water flow and the cold air, thereby improving the cooling efficiency.

[0030] It should be noted that, in the upper water tank 2 of this embodiment, the porous cooling plates 4 inside thereof can be set not only as three layers, but also as four layers or more layers according to the demand for cooling water volume.

[0031] The porous cooling plate 4 is provided with a plurality of neatly arranged water leakage holes 401, such as Figure 2 As shown, the edges of the leak holes 401 protrude 1-3 mm from the top surface of the porous cooling plate 4. The diameter of the leak holes 401 is 1-2 mm. The distance between two adjacent leak holes in each row is 10 ± 1 mm, and the leak holes in two adjacent rows are staggered. The raised structure of the leak holes facilitates the distribution of circulating water on the surface of the porous cooling plate, promoting cooling while also promoting scaling and reducing scaling ions.

[0032] The main function of the lower water tank 1 is to collect, precipitate and pre-cool the heated circulating water flowing out of the heat exchanger pipeline of the production equipment. A first water inlet 101 is arranged on the top of the porous cooling plate 4 above the lower water tank 1, and a first water outlet 102, a first overflow port 103 and a first discharge port 104 are opened on the side wall of the lower water tank 1, wherein the first water inlet 101 is close to the higher end of the porous cooling plate 4, and the first water inlet 101 can be fixed on the mounting frame 6. The first water inlet 101 is connected to the hot water output port of the circulating cooling water system (that is, connected to the circulating water output end of the heat exchanger pipeline of the production equipment, and receives the hot water heat exchanged by the heat exchanger pipeline); the first water outlet 102 and the first discharge port 104 are located at the bottom of the side wall of the lower water tank 1, generally arranged on both sides of the lower water tank, and the first overflow port 103 is located at the top of the side wall of the lower water tank 1.

[0033] The main function of the upper water tank 2 is to further cool the pre-cooling water in the lower water tank 1. A second water inlet 201 is arranged on the top of the porous cooling plate 4 above the upper water tank 2, and a second water outlet 202, a second overflow port 203, a second discharge port 204 and a water replenishment port 205 are opened on the side wall of the upper water tank 2, wherein the second water inlet 201 is close to the higher end of the porous cooling plate 4, and the second water inlet 102 can be fixed on the mounting frame 6. The second water outlet 202 and the second discharge port 204 are located at the bottom of the side wall of the upper water tank 2, and are generally arranged on both sides of the upper water tank. The second water outlet 202 is connected to the cold water input port of the circulating cooling water system (that is, it is connected to the circulating water input end of the heat exchanger pipeline of the production equipment, and delivers cold water for heat exchange to the heat exchanger pipeline), and the second overflow port 203 and the water replenishment port 205 are located at the top of the side wall of the upper water tank 2.

[0034] A water supply system is also connected between the lower water tank 1 and the upper water tank 2. The water supply system includes a water pump 5, which is fixedly installed on the support frame 3. The water inlet port of the water pump 5 is connected to the first water outlet 102 of the lower water tank 1 through a pipe, and a filter is provided in the lower water tank 1 at the first water outlet 102 to prevent solid impurities and large scale in the water tank from entering the water pump or the upper water tank, thereby preventing the pipes in the water supply system from being blocked; the water outlet port of the water pump 5 is connected to the second water inlet 201 of the upper water tank 2 through a pipe.

[0035] The lower sink 1 is fixed on the ground, and the upper sink 2 is vertically arranged above and below the lower sink 1. This system occupies a small area and is easy to install. A spacing is provided between the lower sink 1 and the upper sink 2. Specifically, the bottom of the upper sink 2 is 1-1.5 meters away from the top of the lower sink 1 to ensure sufficient space for cold air circulation within the lower sink 1.

[0036] In this embodiment, the dimensions of the lower water tank are 0.5m high, 2.5m wide, and 3.5m long; the dimensions of the upper water tank are 2m high, 2.5m wide, and 3.5m long; the dimensions of the porous cooling plate are 0.5m wide, 2.5m long, and 0.2mm thick. The porous cooling plate 4 in this embodiment is made of thin aluminum sheet tile panels, which are more conducive to heat conduction and heat dissipation.

[0037] During the production process of the porous cooling plate 4, a hole-punching device is used to punch holes from the back of the tile plate, so that each hole edge on the front has a circle of 1-3mm protrusions. The upward protrusions have the following functions: on the one hand, they block the water that needs to be cooled, so that the time the water stays on the top surface of the porous cooling plate 4 is prolonged, so as to gain more cooling time; on the other hand, they make the water that needs to be cooled cover the top surface of the porous cooling plate 4 as much as possible, thereby increasing the contact area between the water and the cold air and the plate surface. Since the porous cooling plate 4 made of metal has high thermal conductivity, the cooling efficiency of the present invention is improved.

[0038] In actual installation of the technical solution of the present invention, the best is to make the hot water output port of the external circulating cooling water system higher than the first water inlet 101 of the lower water tank 1, and the height difference is greater than 0.5m. In this way, the hot water discharged by the external circulating cooling water system can be transported to the lower water tank 1 mainly by the gravity of the water itself, thereby saving the energy consumption required for transporting circulating water and reducing operating costs; a drainage ditch is set on the ground on one side of the lower water tank 1, so that the sewage generated by the lower water tank and the upper water tank during the cleaning process can be directly discharged into the drainage ditch through the first discharge port and the second discharge port, and the circulating water overflowing from the first overflow port and the second overflow port can also be directly discharged into the drainage ditch; the primary water supply port connected to the water replenishment port 205 of the upper water tank 2 can be a tap water supply port, or it can be other water sources within the enterprise that can be used for the circulating cooling water system.

[0039] The working principle and working steps of the present invention are as follows:

[0040] After the cooling device is installed, the upper water tank 2 is first filled with water through the water inlet 205. The cooling water of the circulating cooling water system is then output through the second water outlet 202 to cool the production equipment or production materials. The cooling water is heated to hot water after passing through the heat exchanger pipes of the production equipment, and then enters the lower water tank 1 through the first water inlet 101. After entering the lower water tank, the hot water is first dispersed onto the entire metal plate surface through the porous cooling plate, where it exchanges heat with the surrounding cold air. The dispersed hot water then flows down to the lower water tank through the leaking holes in a waterfall-like manner, where it further exchanges heat with the cold air during the pouring process. After a certain period of time, the pre-cooled water in the lower water tank gradually increases. When the liquid level reaches a certain height, the water pump is started to pump the pre-cooled water from the lower water tank into the upper water tank, where it is further cooled by the multiple layers of porous cooling plates. The cooling water in the upper water tank, which has undergone two cooling processes, then returns to the circulating cooling water system through the second water outlet and continues to be used to cool the production equipment and production materials. In this way, the water lost due to evaporation of hot water can be replenished in time through the water replenishment port to maintain normal liquid level pressure and continuously supply cooling water to the circulating cooling water system.

[0041] The upper water tank 2 of the present invention is provided with a water supply port 205, so the cooling device of the present invention can not only be used to cool the circulating water, but also can be used as a water storage container or water supply end device of the circulating cooling water system connected to the circulating cooling water system.

[0042] In the present invention, a small amount of circulating water or intermittently output circulating water is pre-cooled by the lower water tank, and then the circulating water is secondary cooled by the upper water tank to improve the cooling efficiency; the structure that plays the main cooling role in the lower water tank and the upper water tank is a porous cooling plate, which utilizes its plate surface and leakage holes to increase the contact area and contact time between the circulating water and the cold air, further improving the cooling efficiency of the present invention; the present invention has a simple structure and is easy to install. The equipment and manufacturing materials used are inexpensive. It can be widely used in circulating cooling water systems with small circulating water volumes or that require intermittent circulating cooling, providing a high-efficiency and low-cost water cooling equipment for the production of small, medium and micro enterprises. The present invention is energy-saving and environmentally friendly, further reducing the production costs of enterprises.

[0043] During normal production, when a circulating cooling water system is needed to cool production equipment or materials, the circulating cooling water system, cooling device, and heat exchanger of the production equipment are all placed indoors and run simultaneously. In long-term practice, technicians have recorded the cooling effects of the cooling device of the present invention in different seasons as follows:

[0044]

[0045] In the above table 1, the change record of cooling water temperature is for example Figure 1 In the embodiment shown in , in this embodiment, the porous cooling plate provided in the lower water tank is one layer, and the porous cooling plate provided in the upper water tank is three layers;

[0046] In addition, the present inventors recorded the temperature changes of the cooling water during the operation of the cooling device with one layer of porous cooling plates and five layers of porous cooling plates in the upper water tank. The recorded data are as follows:

[0047]

[0048] Table 2 above records the cooling device with only one layer of porous cooling plates in both the lower and upper water tanks.

[0049]

[0050] The above Table 3 records the cooling device with one layer of porous cooling plates in the lower water tank and five layers of porous cooling plates in the upper water tank.

[0051] By comparing the data in the above three tables, it can be shown that in the cooling device of the present invention, the more layers of porous cooling plates are arranged in the upper water tank, the better the overall cooling effect of the cooling device will be. However, the number of layers of porous cooling plates in the upper water tank should be comprehensively selected based on the operating time of the circulating cooling water, the cooling effect, and other aspects.

[0052] In addition, in actual use, the present invention is directed to a circulating cooling water system with a small amount of circulating water or intermittent circulation. The output water to be cooled is first accumulated in the lower water tank to a certain liquid level before being discharged into the upper water tank for further cooling. Combined with the above three tables, it can be seen that the temperature of the circulating water when it is in the lower water tank is relatively high. The high temperature promotes the rapid formation and precipitation of scale ions in the water. In addition, the circulating water is stored and remains in the lower water tank for a long time. Therefore, during the accumulation and resting time of the circulating water in the lower water tank, most of the scale ions can be removed, and most of the impurities will also be precipitated in the lower water tank. After the circulating water passes through the porous cooling plate in the upper water tank, the temperature drops significantly. Although the rate of scale ion precipitation slows down, the scale ions in the circulating water are further reduced during the secondary cooling process in the upper water tank. Therefore, the circulating water that eventually returns to the circulating cooling water system has greatly reduced scale ions. Furthermore, since the water pipe outlet of the cooling system provided by the upper water tank is at a certain distance from the bottom of the upper water tank, the scaling ions in the water are further deposited at the bottom of the upper water tank, thereby ensuring that the cooling water provided by the circulating cooling water system of the present invention greatly reduces scaling, blockage, and corrosion of pipes in the heat exchanger of the production equipment.

[0053] After the cooling device of the present invention has been running for a period of time, scale is precipitated in the lower water tank, and the heat exchanger pipeline of the production equipment remains unobstructed after multiple production cycles.

[0054] The cooling device of the present invention significantly reduces scaling in the heat exchanger piping without adding any scale inhibitors to the circulating water, allowing the circulating cooling water system to better cool production equipment and materials. This is another significant advantage of the present invention's technical solution over currently used cooling devices.

[0055] In summary, the cooling device of the present invention can effectively reduce the problem of blockage and corrosion of the water supply pipelines and heat exchanger pipelines of the circulating cooling water system due to scaling. After using the cooling device of the present invention, the various equipment in the circulating cooling water system can significantly reduce the number of cleanings and reduce operating costs.

[0056] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technical solution obtained by any technician familiar with the field within the technical scope disclosed by the present invention and by equivalent replacement or modification based on the technical concept of the present invention should be covered by the scope of protection of the present invention.

Claims

1. A cooling device for a circulating cooling water system, characterized in that: The cooling device comprises a lower water trough (1) and an upper water trough (2) with an opening at the top, and a support frame (3) for fixing the upper water trough (2) above the lower water trough (1), a spacing distance being set between the lower water trough (1) and the upper water trough (2), a mounting frame (6) being fixedly set above the lower water trough (1) and the upper water trough (2), and a layer of porous cooling plates (4) being fixedly installed in the air above the lower water trough (1) via the mounting frame (6), and a plurality of layers of porous cooling plates (4) being fixedly installed in the air above the upper water trough (2) via the mounting frame (6); The porous cooling plate (4) is provided with a plurality of water leakage holes, the edges of the water leakage holes are raised 1-3 mm above the top surface of the porous cooling plate (4), and the diameter of the water leakage holes is 1-2 mm; A water supply system is also connected between the lower water tank (1) and the upper water tank (2); A first water inlet (101) is provided on the top of the porous cooling plate (4) above the lower water trough (1), and a second water inlet (201) is provided on the top of the multi-layer porous cooling plate (4) above the upper water trough (2). The porous cooling plates (4) are all inclined at an angle of 2-5 degrees. The first water inlet (101) is close to the higher end of the porous cooling plate (4) above the lower water trough (1), and the second water inlet (201) is close to the higher end of the porous cooling plate (4) above the upper water trough (2).

2. A cooling device for a circulating cooling water system according to claim 1, characterized in that: The first water inlet (101) is connected to the hot water output port of the circulating cooling water system, and a first water outlet (102) is provided at the bottom of the side wall of the lower water tank (1); A second water outlet (202) is provided at the bottom of the side wall of the upper water tank (2), and the second water outlet (202) is connected to the cold water input port of the circulating cooling water system; The water supply system is connected between the first water outlet (102) of the lower water tank (1) and the second water inlet (201) of the upper water tank (2).

3. The cooling device for a circulating cooling water system according to claim 1, characterized in that: A liquid level indicator tube (7) is also installed on the outside of the side wall of the upper water tank (2). A water replenishment port (205) is also provided on the side wall of the upper water tank (2), and the water replenishment port (205) is connected to an external primary water supply port.

4. The cooling device for a circulating cooling water system according to claim 1, characterized in that: There are three to five layers of porous cooling plates (4) above the upper water trough (2), with the interval between two adjacent layers of porous cooling plates (4) being 0.1-0.2 m, and the distance between the bottom layer of porous cooling plates (4) and the top surface of the upper water trough (2) being 1-2 m.

5. The cooling device for a circulating cooling water system according to claim 1, characterized in that: The porous cooling plate (4) is made of an aluminum sheet tile plate or an aluminum sheet flat plate.

6. The cooling device for a circulating cooling water system according to claim 2, characterized in that: The water supply system comprises a water pump (5), which is fixedly mounted on the support frame (3); a water inlet port of the water pump (5) is connected to the first water outlet (102) via a pipe; a filter is provided in the lower water tank (1) at the first water outlet (102); and a water outlet port of the water pump (5) is connected to the second water inlet (201) via a pipe.

7. The cooling device for a circulating cooling water system according to claim 2, characterized in that: The side wall of the lower water trough (1) is also provided with a first overflow port (103) and a first discharge port (104), wherein the first overflow port (103) is located at the top of the side wall of the lower water trough (1), and the first discharge port (104) is located at the bottom of the side wall of the lower water trough (1); A second overflow port (203) and a second discharge port (204) are also provided on the side wall of the upper water trough (2), wherein the second overflow port (203) is located at the top of the side wall of the upper water trough (2), and the second discharge port (204) is located at the bottom of the side wall of the upper water trough (2).

8. The cooling device for a circulating cooling water system according to claim 1, characterized in that: The lower water trough (1) is fixedly placed on the ground, the upper water trough (2) and the lower water trough (1) are vertically distributed up and down, and the distance between the bottom surface of the upper water trough (2) and the top surface of the lower water trough (1) is 1-1.5m.

9. The cooling device for a circulating cooling water system according to claim 8, characterized in that: The water leakage holes are neatly arranged on the porous cooling plate, the distance between two adjacent water leakage holes in each row is 10±1 mm, and the water leakage holes in two adjacent rows are staggered.

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