Anti-freezing device for water inlet pipe of cooling water tower

Abstract

An anti-freezing device for a water inlet pipe of a cooling water tower belongs to the technical field of anti-freezing of cooling water towers of thermal power plants. The cooling water tower comprises a first cooling water tower, a second cooling water tower, a first anti-freezing pipe and a second anti-freezing pipe, and the first cooling water tower and the second cooling water tower are provided with a first cooling water tower main water inlet pipe and a second cooling water tower main water inlet pipe which are used for conveying hot water respectively. One end of the first anti-freezing pipe is obliquely communicated with a main water inlet pipe of the first cooling water tower, the other end of the first anti-freezing pipe is directly led into a cold water pool of the first cooling water tower, one end of the second anti-freezing pipe is obliquely communicated with a main water inlet pipe of the second cooling water tower, and the other end of the second anti-freezing pipe is directly led into a cold water pool of the second cooling water tower. And a first anti-freezing valve and a second anti-freezing valve are respectively mounted on the first anti-freezing pipe and the second anti-freezing pipe. When the cooling water tower is in a standby state in winter, the water inlet pipe and the filler of the water tower can be prevented from being damaged by accumulated water freezing.

Description

Technical Field

[0001] The utility model relates to an antifreeze device for a water inlet pipe of a cooling water tower, belonging to the technical field of antifreeze of cooling water towers in thermal power plants. Background Art

[0002] The main function of a cooling tower is to effectively exchange heat between the cooling water containing waste heat and the air inside it, thereby transferring heat from the water to the air and eventually discharging it into the atmosphere. This process is particularly important in thermal power plants because it involves cooling the waste (exhaust) steam generated after the high-temperature and high-pressure steam drives the steam turbine to generate electricity so that it can be used again. This process not only helps to reduce the water temperature, but also ensures the stable operation of the equipment and systems of the power plant.

[0003] At present, the circulating water supply system designed for the wet cooling unit of the thermal power plant has the drain pipe behind the cooling tower door designed 5 meters underground in the valve well of the water tower. The water tower drains into the "rainwater well" and then into the Didao River, which will cause water resource waste and penalties from the environmental protection department. In winter, when the thermal power plant uses high-temperature and high-pressure steam to drive the steam turbine to generate electricity, it extracts part of the steam from the five-stage steam extraction to exchange heat with the heating network, and finally exchanges the heat to the heating network for heating residents, while generating less exhaust steam, which is cooled by cooling water. Since the amount of water required for cooling by the cooling tower is small, when the cooling water volume is small, the cooling water tower needs to be shut down. If the water inlet valve of the cooling tower is not sealed tightly (due to the low temperature in the Northeast region in winter, thermal expansion and contraction lead to valve leakage), a small amount of water enters the "water tower shaft, water filling, and water distribution pipe", which is easy to freeze, causing large-scale frostbite and damage to the water tower shaft, water filling, and matching (water) pipes. In addition, the valve well of the cooling tower must be insulated and closed for anti-freezing in winter, which is inconvenient for operating personnel to operate.

[0004] Based on the above problems, it is urgent to propose a cooling tower water inlet pipe antifreeze device to solve the above problems. Utility Model Content

[0005] The utility model is to solve the above technical problems. A brief overview of the utility model is given below to provide a basic understanding of some aspects of the utility model.

[0006] The technical solution of this utility model:

[0007] A cooling water tower water inlet pipe antifreeze device comprises a first cooling water tower and a second cooling water tower, the first cooling water tower and the second cooling water tower are respectively provided with a first cooling water tower main water inlet pipe and a second cooling water tower main water inlet pipe for conveying hot water, the first cooling water tower main water inlet pipe and the second cooling water tower main water inlet pipe are respectively installed with a first cooling water tower water inlet valve and a second cooling water tower water inlet valve, the first cooling water tower and the second cooling water tower water outlets are respectively connected with a first overflow well and a second overflow well, and the first overflow well and the second overflow well are respectively connected to a drainage pipe through a first gate well and a second gate well;

[0008] It also includes a first antifreeze pipe and a second antifreeze pipe. One end of the first antifreeze pipe is installed on the main water inlet pipe of the first cooling water tower at an angle, and the other end of the first antifreeze pipe is directly introduced into the cold water pool of the first cooling water tower. One end of the second antifreeze pipe is installed on the main water inlet pipe of the second cooling water tower at an angle, and the other end of the second antifreeze pipe is directly introduced into the cold water pool of the second cooling water tower. The first antifreeze pipe and the second antifreeze pipe are respectively provided with a first antifreeze valve and a second antifreeze valve.

[0009] Preferably: the first cooling water tower main water inlet pipe and the second cooling water tower main water inlet pipe are respectively connected with the first auxiliary water inlet pipe and the second auxiliary water inlet pipe, and the first auxiliary water inlet pipe and the second auxiliary water inlet pipe are respectively installed with the first auxiliary water inlet valve and the second auxiliary water inlet valve.

[0010] Preferably, it also includes a first water supply pipe and a second water supply pipe, the first water supply pipe is connected to the first cooling water tower and the second cooling water tower respectively after diversion, and the second water supply pipe is also connected to the first cooling water tower and the second cooling water tower respectively after diversion.

[0011] Preferably, the angle formed by the first antifreeze pipe and the main water inlet pipe of the first cooling water tower is in the range of 20-45°, and the angle formed by the second antifreeze pipe and the main water inlet pipe of the second cooling water tower is in the range of 20-45°.

[0012] Preferably: the herringbone columns of the first cooling water tower and the second cooling water tower are provided with antifreeze edges arranged in an inclined downward direction, an annular antifreeze pipe is arranged on the antifreeze edge, the annular antifreeze pipe is installed on the herringbone column through a hanger, and a water leakage hole is opened at the bottom of the annular antifreeze pipe.

[0013] Preferably, the hot water in the annular antifreeze pipe is directly sprayed onto the antifreeze edge through the water leakage hole, forming a hot water curtain around the first cooling water tower and the second cooling water tower, and finally falls into the cold water pool.

[0014] The utility model has the following beneficial effects:

[0015] 1. The utility model is a cooling water tower inlet pipe antifreeze device. When the cooling water tower is in a standby state in winter, it can prevent the cooling water tower inlet valve from being loose, resulting in water accumulation in the water tower shaft unable to be discharged, and prevent the accumulated water (or small water flow) from freezing and damaging the water tower and filler.

[0016] 2. After the two water towers of the utility model are equipped with antifreeze pipes and antifreeze valves, the cooling water towers can be operated and kept in standby mode in winter.

[0017] 3. The structural design of the utility model can effectively prevent the water tower shaft, water sprinkling filler and water distribution pipe from being damaged by freezing due to the low temperature in winter, and effectively increase the service life of the cooling tower water inlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a system connection diagram of a cooling tower water inlet pipe antifreeze device;

[0019] Figure 2 It is a schematic diagram of the internal structure of the second cooling water tower in the second specific implementation mode;

[0020] Figure 3 is a schematic diagram of the internal structure of the second cooling water tower in the sixth specific implementation mode;

[0021] Figure 4 yes Figure 3 Enlarged view of point A in the middle

[0022] Figure 5 Schematic diagram of the structural arrangement of the herringbone column, the antifreeze edge and the annular antifreeze pipe in the sixth specific implementation mode;

[0023] Figure 6 It is a schematic diagram of the structural arrangement of the antifreeze edge and the annular antifreeze pipe on the tower body in the seventh specific implementation mode;

[0024] In the figure, 1-the first cooling water tower, 2-the second cooling water tower, 3-the main water inlet pipe of the first cooling water tower, 4-the main water inlet pipe of the second cooling water tower, 5-the water inlet valve of the first cooling water tower, 6-the water inlet valve of the second cooling water tower, 7-the first overflow well, 8-the second overflow well, 9-the first gate well, 10-the second gate well, 11-the drainage pipe, 12-the first antifreeze pipe, 13-the second antifreeze pipe, 14-the first antifreeze valve, 15-the second Antifreeze valve, 16-first auxiliary water inlet pipe, 17-second auxiliary water inlet pipe, 18-first auxiliary water inlet valve, 19-second auxiliary water inlet valve, 20-first water supply pipe, 21-second water supply pipe, 22-herringbone column, 23-antifreeze edge, 24-annular antifreeze pipe, 25-hanger, 26-leakage hole, 27-hot water curtain, 28-tower body, 29-cold water pool, 30-water sprinkling filler, 31-water retainer, 32-water distribution pipe. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is described below by specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0026] Specific implementation method 1: Combination Figure 1-Figure 5 The present embodiment is described. A cooling water tower water inlet pipe antifreeze device of the present embodiment comprises a first cooling water tower 1 and a second cooling water tower 2. The first cooling water tower 1 and the second cooling water tower 2 are respectively provided with a first cooling water tower main water inlet pipe 3 and a second cooling water tower main water inlet pipe 4 for conveying hot water. The first cooling water tower main water inlet pipe 3 and the second cooling water tower main water inlet pipe 4 are respectively provided with a first cooling water tower water inlet valve 5 and a second cooling water tower water inlet valve 6. The drainage outlets of the first cooling water tower 1 and the second cooling water tower 2 are respectively connected to a first overflow well 7 and a second overflow well 8. The first overflow well 7 and the second overflow well 8 are respectively connected to the first cooling water tower main water inlet pipe 3 and the second cooling water tower main water inlet pipe 4. The drainage pipe 11 is connected through the first gate shaft 9 and the second gate shaft 10 respectively; it also includes a first antifreeze pipe 12 and a second antifreeze pipe 13, one end of the first antifreeze pipe 12 is installed on the main water inlet pipe 3 of the first cooling water tower, and the other end of the first antifreeze pipe 12 is directly introduced into the cold water pool of the first cooling water tower 1, one end of the second antifreeze pipe 13 is installed on the main water inlet pipe 4 of the second cooling water tower, and the other end of the second antifreeze pipe 13 is directly introduced into the cold water pool of the second cooling water tower 2, and the first antifreeze pipe 12 and the second antifreeze pipe 13 are respectively installed with a first antifreeze valve 14 and a second antifreeze valve 15. In this way, two cooling water towers are designed in this embodiment, namely, the first cooling water tower 1 and the second cooling water tower 2. In the actual operation of the thermal power plant, the hot water generated can be cooled by the first cooling water tower 1 or the second cooling water tower 2, or by both cooling towers at the same time. The specific process is: the hot water generated by the steam turbine after power generation enters the first cooling water tower 1 and the second cooling water tower 2 respectively through the first cooling water tower main water inlet pipe 3 and the second cooling water tower main water inlet pipe 4, and the water is cooled inside the first cooling water tower 1 and the second cooling water tower 2. In addition, when the amount of water cooled in the first cooling water tower 1 and the second cooling water tower 2 is too much, the excess water can overflow into the first overflow well 7 and the second overflow well 8, and be discharged into the drainage pipe 11 through the first gate well 9 and the second gate well 10 respectively, or when the water quality after cooling in the first cooling water tower 1 and the second cooling water tower 2 is poor, the water can overflow into the first overflow well 7 and the second overflow well 8, and be discharged into the drainage pipe 11 through the first gate well 9 and the second gate well 10 respectively.

[0027] In winter, one water tower is in operation and the other water tower is in standby state. For example, the first cooling water tower 1 is in normal operation and the second cooling water tower 2 is in standby state. At this time, the second cooling water tower water inlet valve 6 is closed and the second antifreeze valve 15 on the second antifreeze pipe 13 is opened. Under normal circumstances, hot water will not flow into the second cooling water tower 2 through the second cooling water tower main water inlet pipe 4. However, due to thermal expansion and contraction and long-term use in winter, the second cooling water tower water inlet valve 6 is prone to poor sealing. At this time, the water leaked through the second cooling water tower water inlet valve 6 directly flows into the inclined second antifreeze pipe 13 installed on the second cooling water tower main water inlet pipe 4, and directly flows into the cold water pool through the second antifreeze pipe 13. Under the action of the second antifreeze pipe 13, the water leaked from the second cooling water tower water inlet valve 6 will not enter the "water tower shaft, water sprinkling filler and matching pipe", and no residual moisture will be generated in the second cooling water tower main water inlet pipe 4. Therefore, the "water tower shaft, water sprinkling filler and water distribution pipe" will not freeze, effectively realizing the antifreeze of the cooling water tower water inlet pipe.

[0028] Specific implementation method 2: Combination Figure 1-Figure 5 To illustrate this embodiment, a cooling tower water inlet pipe antifreeze device according to this embodiment is provided. Figure 2 As shown, the first cooling water tower 1 and the second cooling water tower 2 both include a "hyperbolic" tower body 28, which is supported by a herringbone column 22, and the bottom of the tower body 28 is a cold water pool 29, and the tower body 28 is provided with a water spraying filler 30 and a water retainer 31, and the water retainer 31 is arranged above the water spraying filler 30, and a water distribution pipe 32 is arranged between the water spraying filler 30 and the water retainer 31, and the water distribution pipe 32 is connected to the main water inlet pipe 3 of the first cooling water tower or the main water inlet pipe 4 of the second cooling water tower. The principle of cooling water in the cooling water tower is: the hot water entering the tower body 28 enters the water distribution pipe 32, and falls on the water spraying filler 30 through the water distribution pipe 32, the air enters the tower body 28 through the herringbone column 22, and contacts the water sprinkled by the water distribution pipe 32 through the water spraying filler 30, absorbs heat, causes part of the water to evaporate, and the evaporated water is discharged from the top of the tower body 28, and this process achieves the reduction of water temperature.

[0029] In this embodiment, Figure 2Schematic diagram of the internal structure of the second cooling water tower 2. In winter, if the second cooling water tower 2 is in standby mode, the second cooling water tower water inlet valve 6 is closed and the second antifreeze valve 15 on the second antifreeze pipe 13 is opened. Under normal circumstances, hot water will not flow into the second cooling water tower 2 through the second cooling water tower main inlet pipe 4. However, due to thermal expansion and contraction in winter and long-term use, the second cooling water tower water inlet valve 6 is prone to poor sealing. Since the installation position of the second antifreeze pipe 13 is lower than the second cooling water tower main inlet pipe 4, the second cooling water tower water inlet valve 6 is prone to poor sealing. Pipe 4, at this time, the water leaked through the second cooling water tower water inlet valve 6 directly flows into the second antifreeze pipe 13, and directly flows into the cold water pool 29 through the second antifreeze pipe 13. Since the leaked water will not flow through the water distribution pipe 32 and the water sprinkling filler 30, the water distribution pipe 32 and the water sprinkling filler 30 will not freeze. In addition, since the water leaked from the second cooling water tower water inlet valve 6 directly flows into the second antifreeze pipe 13, the main water inlet pipe 4 of the second cooling water tower will not freeze, which effectively prevents the inside of the cooling water tower water inlet pipe from freezing.

[0030] Specific implementation method three: Combination Figure 1-Figure 5 The present embodiment is described. In the present embodiment, a cooling water tower water inlet pipe antifreeze device is provided. The first cooling water tower main water inlet pipe 3 and the second cooling water tower main water inlet pipe 4 are respectively connected with the first auxiliary water inlet pipe 16 and the second auxiliary water inlet pipe 17. The first auxiliary water inlet pipe 16 and the second auxiliary water inlet pipe 17 are respectively installed with the first auxiliary water inlet valve 18 and the second auxiliary water inlet valve 19. With such arrangement, when the first cooling water tower 1 and the second cooling water tower 2 are put into use, when the first cooling water tower main water inlet pipe 3 or the second cooling water tower main water inlet pipe 4 needs to be repaired, the first auxiliary water inlet pipe 16 can be temporarily used to introduce hot water into the first cooling water tower 1, and the second auxiliary water inlet pipe 17 can be temporarily used to introduce hot water into the second cooling water tower 2.

[0031] Specific implementation method four: Combination Figure 1-Figure 5 This embodiment is described. A cooling water tower inlet pipe antifreeze device of this embodiment also includes a first water supply pipe 20 and a second water supply pipe 21. The first water supply pipe 20 is connected to the first cooling water tower 1 and the second cooling water tower 2 respectively after diversion. The second water supply pipe 21 is also connected to the first cooling water tower 1 and the second cooling water tower 2 respectively after diversion. In this way, the water cooled by the first cooling water tower 1 and the second cooling water tower 2 is treated and used for turbine circulation. When the amount of water cooled by the first cooling water tower 1 and the second cooling water tower 2 is reduced, the water can be supplemented through the first water supply pipe 20 or the second water supply pipe 21. The amount of supplementary water is large, so two water supply pipes are designed to supplement the first cooling water tower 1 and the second cooling water tower 2 from different reservoirs.

[0032] Specific implementation method five: Combination Figure 1-Figure 5The present embodiment is described. In the present embodiment, a cooling water tower water inlet pipe antifreeze device is provided. The angle formed by the first antifreeze pipe 12 and the first cooling water tower main water inlet pipe 3 is in the range of 20-45°, and the angle formed by the second antifreeze pipe 13 and the second cooling water tower main water inlet pipe 4 is in the range of 20-45°. In this way, the angle formed by the first antifreeze pipe 12 and the first cooling water tower main water inlet pipe 3, and the angle formed by the second antifreeze pipe 13 and the second cooling water tower main water inlet pipe 4 are 20°, 25°, 30°, 35°, 40°, 45°. At this angle, the water leaked from the second cooling water tower water inlet valve 6 directly flows into the second antifreeze pipe 13 under the action of gravity. Since the first antifreeze pipe 12 and the second antifreeze pipe 13 are tilted and form a certain angle, the water will not be retained in the first antifreeze pipe 12 and the second antifreeze pipe 13, and will directly flow into the cold water pool 29, thereby avoiding the first antifreeze pipe 12 and the second antifreeze pipe 13 from freezing in winter.

[0033] Specific implementation method six: Combination Figure 1-Figure 5 The present embodiment is described. In the present embodiment, a cooling water tower water inlet pipe antifreeze device is provided. An antifreeze edge 23 arranged in an inclined downward direction is installed on the herringbone columns 22 of the first cooling water tower 1 and the second cooling water tower 2. An annular antifreeze pipe 24 is arranged on the antifreeze edge 23. The annular antifreeze pipe 24 is installed on the herringbone column 22 through a hanger 25. A water leakage hole 26 is opened at the bottom of the annular antifreeze pipe 24. The hot water in the annular antifreeze pipe 24 is directly splashed onto the antifreeze edge 23 through the water leakage hole 26, and a hot water curtain 27 is formed around the first cooling water tower 1 and the second cooling water tower 2, and finally falls into the cold water pool. With such an arrangement, an annular antifreeze pipe 24 is used to solve the problem of freezing. The principle is to design an antifreeze edge 23 on the herringbone columns 22 that support the cooling water tower around the tower (when making the reinforced concrete herringbone columns 22, the antifreeze edge 23 is also made at the same time), a circle of annular antifreeze pipe 24 is added to the antifreeze edge 23, and an antifreeze pipe regulating valve is arranged on the annular antifreeze pipe 24. The annular antifreeze pipe 24 is arranged below the water sprinkling filler 30, and the hot water of the water inlet pipe on the cooling water tower is directly led into the annular antifreeze pipe 24 before the water inlet valve, and a leakage hole 26 is opened at the lower part of the annular antifreeze pipe 24. During winter operation, the antifreeze pipe regulating valve can be opened, and hot water is directly splashed onto the antifreeze edge 23 without being cooled by the water spraying filler 30, forming a hot water curtain 27 around the water tower and falling into the cold water pool 29, which increases the water flow density around the cooling water tower. The cold air and the hot water curtain 27 first exchange heat to increase the air temperature around and inside the cooling water tower, thereby achieving less or no ice around and inside the cooling water tower. This method is used in conjunction with a windshield (a windshield laid on the periphery of the herringbone column 22 for the purpose of windproofing), and the effect will be better, ensuring the safe and efficient operation of the cooling water tower in winter. In summer, the antifreeze pipe regulating valve is closed, and the annular antifreeze pipe 24 stops spraying water, which does not affect the normal operation of the cooling water tower in summer.

[0034] In the present embodiment, a "square" water leakage hole 26 is opened in the axial direction of the annular antifreeze pipe 24. After the hot water is sprayed out from the water leakage hole 26, it is reflected on the antifreeze edge 23 and bent into a horizontal water flow to melt the ice on the columns (H-shaped columns) and the lower part of the filler in the cooling water tower, while the other part flows downward along the antifreeze edge 23 to form a hot water curtain (hot water curtain 27) at the air inlet, thereby increasing the air intake resistance, reducing the amount of air entering the cooling water tower, increasing the temperature of the cold air entering the tower, and allowing the ice on the upper edge of the air inlet to be melted by the hot water, thereby having an effective antifreeze effect.

[0035] Specific implementation method seven: Combination Figure 6 The present embodiment is described. The present embodiment is an antifreeze device for the water inlet pipe of a cooling water tower. The difference from the specific embodiment six is ​​that in the present embodiment, the antifreeze edge 23 is installed on the inner wall of the tower body 28. Specifically: an antifreeze edge 23 is installed on the inner wall of the tower body 28. The antifreeze edge 23 is arranged below the water sprinkling filler 30. The antifreeze edge 23 is arranged above the herringbone column 22. An annular antifreeze pipe 24 is installed on the antifreeze edge 23. The annular antifreeze pipe 24 is installed on the inner wall of the tower body 28 through a hanger 25 (in the specific implementation process, holes can be drilled on the inner wall of the tower body 28, and expansion bolts can be installed. The annular antifreeze pipe 24 can be hung on the expansion bolts through the hanger 25 and the wire rope). In winter, the heat of the water inlet pipe on the cooling water tower is Before the water inlet valve, water is directly led into the annular antifreeze pipe 24, and a leak hole 26 is opened at the lower part of the annular antifreeze pipe 24. The hot water is not cooled by the water spraying filler 30, and directly splashes onto the antifreeze edge 23, forming a hot water curtain 27 around the water tower and falling into the cold water pool 29. The hot water curtain 27 blocks the entire herringbone column 22 from top to bottom, forming a protective layer. In winter, cold air and the hot water curtain 27 first exchange heat to increase the air temperature around and inside the cooling water tower, thereby achieving less or no ice around and inside the cooling water tower. This method is used in conjunction with a windshield (a windshield laid on the periphery of the herringbone column 22 for the purpose of windproofing), and the effect will be better, ensuring the safe and efficient operation of the cooling water tower in winter.

[0036] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be arranged and combined, and those skilled in the art can exhaust all possibilities based on the mathematical knowledge of arrangement and combination. Therefore, the utility model will no longer describe the technical solutions after arrangement and combination one by one, but it should be understood that the technical solutions after arrangement and combination have been disclosed by the utility model.

[0037] This implementation is only an exemplary description of this patent and does not limit its protection scope. Those skilled in the art may also make partial changes to it, as long as they do not exceed the spirit of this patent, they are all within the protection scope of this patent.

Claims

1. A cooling tower water inlet pipe antifreeze device, characterized in that: The invention comprises a first cooling water tower (1) and a second cooling water tower (2), wherein the first cooling water tower (1) and the second cooling water tower (2) are respectively provided with a first cooling water tower main water inlet pipe (3) and a second cooling water tower main water inlet pipe (4) for conveying hot water, and the first cooling water tower main water inlet pipe (3) and the second cooling water tower main water inlet pipe (4) are respectively installed with a first cooling water tower water inlet valve (5) and a second cooling water tower water inlet valve (6), and the drainage outlets of the first cooling water tower (1) and the second cooling water tower (2) are respectively connected to a first overflow well (7) and a second overflow well (8), and the first overflow well (7) and the second overflow well (8) are respectively connected to a drainage pipe (11) through a first gate well (9) and a second gate well (10); It also comprises a first antifreeze pipe (12) and a second antifreeze pipe (13); one end of the first antifreeze pipe (12) is installed in an inclined manner on the main water inlet pipe (3) of the first cooling water tower; the other end of the first antifreeze pipe (12) is directly introduced into the cold water pool of the first cooling water tower (1); one end of the second antifreeze pipe (13) is installed in an inclined manner on the main water inlet pipe (4) of the second cooling water tower; the other end of the second antifreeze pipe (13) is directly introduced into the cold water pool of the second cooling water tower (2); and a first antifreeze valve (14) and a second antifreeze valve (15) are respectively installed on the first antifreeze pipe (12) and the second antifreeze pipe (13).

2. The cooling tower water inlet pipe antifreeze device according to claim 1, characterized in that: A first auxiliary water inlet pipe (16) and a second auxiliary water inlet pipe (17) are respectively connected to the main water inlet pipe (3) of the first cooling water tower and the main water inlet pipe (4) of the second cooling water tower, and a first auxiliary water inlet valve (18) and a second auxiliary water inlet valve (19) are respectively installed on the first auxiliary water inlet pipe (16) and the second auxiliary water inlet pipe (17).

3. The antifreeze device for a cooling water tower water inlet pipe according to claim 1, characterized in that: It also comprises a first water supply pipe (20) and a second water supply pipe (21); the first water supply pipe (20) is connected to the first cooling water tower (1) and the second cooling water tower (2) respectively after the flow is split; the second water supply pipe (21) is also connected to the first cooling water tower (1) and the second cooling water tower (2) respectively after the flow is split.

4. The cooling tower water inlet pipe antifreeze device according to claim 1, characterized in that: The angle formed by the first antifreeze pipe (12) and the main water inlet pipe (3) of the first cooling water tower is in the range of 20-45°, and the angle formed by the second antifreeze pipe (13) and the main water inlet pipe (4) of the second cooling water tower is in the range of 20-45°.

Images