Winter anti-freezing facility for closed cooling tower

Abstract

The utility model relates to a winter anti-freezing facility for a closed cooling tower, and belongs to the technical field of cooling towers. Comprising a heat exchange core body, a vertical heat exchange core body, a spraying system, a water pump, a water collecting disc, a first pipeline, a second pipeline and a third pipeline, the heat exchange core body is arranged in the water collecting disc, the first pipeline, the heat exchange core body, the second pipeline, the third pipeline and an inlet of the vertical heat exchange core body are sequentially connected, and the water collecting disc is a spraying water collecting disc. An outlet of the water collecting tray is connected with a spraying system through a water pump. An existing heat source is used for exchanging heat with spraying water in the water collecting tray, high-temperature water is cooled, meanwhile, freezing prevention is conducted on the collected spraying water, energy consumption is reduced, and utilization of heat energy of the high-temperature water is achieved. The energy is saved, the environment is protected, and the cost is greatly reduced; the anti-freezing device is suitable for winter anti-freezing of the closed cooling tower in continuous operation and is high in efficiency.

Description

Technical Field

[0001] The utility model relates to an antifreeze facility for a cooling tower, belonging to the technical field of cooling towers. Background Art

[0002] Air conditioning refrigeration systems are divided into air cooling, water cooling and evaporative cooling according to different cooling methods. As an efficient heat dissipation method, evaporative cooling can be used not only in the process of air treatment, but also in cooling other high-temperature fluids. Among them, closed cooling towers, as a common equipment for indirect evaporative cooling heat dissipation, are widely used in various industries such as air conditioning, pharmaceuticals, chemicals, and power generation.

[0003] For a closed cooling tower, the process fluid flows in the coil and conducts heat to the outside of the tube through the tube wall; at the same time, spray water is sprayed outside the tube to form a water film on the outer wall of the tube. Under the action of air, the heat transfer and mass transfer process occurs outside the tube through spray evaporation, thereby achieving heat transfer. A closed cooling tower can ensure that the water quality is not polluted, which well protects the efficient operation of the main equipment and increases its service life.

[0004] However, since the circulating spray water system of a closed cooling tower is an open system and is in direct contact with the ambient air, a serious problem often occurs during winter operation: when the ambient temperature drops below zero, the spray water may freeze when the closed cooling tower is running, affecting the safe operation of the equipment.

[0005] At present, three methods are usually used to solve the problem of winter antifreeze of closed cooling towers: electric heating, adding antifreeze liquid and shutting down and draining. However, the above three methods all have the following disadvantages:

[0006] 1. Adding an electric heater will significantly increase the total power of the equipment and pose a risk of leakage;

[0007] 2. Since antifreeze is usually volatile and toxic, when adding antifreeze in proportion to the ambient temperature to effectively solve the problem of winter antifreeze of cooling towers, it is easy to cause pollution to the environment, and the lower the temperature, the greater the risk of pollution and the higher the cost of use;

[0008] 3. Shutdown drainage is suitable for situations where the machine does not need to be started in winter, so it is not suitable for closed cooling towers that need to run continuously.

[0009] Therefore, it is urgent to propose a closed cooling tower winter antifreeze facility to solve the above technical problems. Utility Model Content

[0010] In order to overcome the deficiencies in the prior art, the utility model provides a brief overview of the utility model below to provide a basic understanding of certain aspects of the utility model. It should be understood that this overview is not an exhaustive overview of the utility model. It is not intended to determine the key or important parts of the utility model, nor is it intended to limit the scope of the utility model.

[0011] The technical solution of this utility model:

[0012] A winter antifreeze facility for a closed cooling tower comprises a heat exchange core, a vertical heat exchange core, a spray system, a water pump, a water collecting tray, a first pipe, a second pipe and a third pipe. The heat exchange core is arranged in the water collecting tray, and the inlets of the first pipe, the heat exchange core, the second pipe, the third pipe and the vertical heat exchange core are connected in sequence. The water collecting tray is a spray water collecting tray, and the outlet of the water collecting tray is connected to the spray system through a water pump.

[0013] Preferably, the heat exchange core is a three-dimensional deformable tube heat exchanger, that is, a spiral coil.

[0014] Preferably: it also includes a first fan, a filler and a fourth pipe, the nozzle of the spray system, the vertical heat exchange core, the filler and the water collecting tray are fixedly installed on the frame from top to bottom, the nozzle of the spray system is connected to the water pump through the vertical conduit of the spray system, the outlet of the vertical heat exchange core is connected to the fourth pipe, the nozzle and the fan of the spray system are fixedly installed on the upper part of the frame, and the vertical heat exchange core is the vertical heat exchange core of the closed cooling tower.

[0015] Preferably: it also includes a water tank, a first stop valve, a one-way valve, a second stop valve and a third stop valve, the input pipe is connected to the first pipeline and the third pipeline through a three-way pipe, the first stop valve is installed on the input pipe, the third stop valve is installed on the first pipeline, the second stop valve is installed on the third pipeline, the outlet of the vertical heat exchange core is connected to the water tank through a fourth pipeline, and the one-way valve is installed on the fourth pipeline.

[0016] Preferably: it also includes an air cooling system, the air cooling system includes an air cooling pipe and a second fan, the input pipe, the air cooling pipe, and the water tank are connected in sequence, the second fan and the air cooling pipe are correspondingly arranged, and the second fan and the air cooling pipe are fixedly installed on the ground through a bracket.

[0017] Preferably: it also includes a water cooling system, the water cooling system includes a heat exchanger, an open cooling tower and a circulating water pump, the input pipe, the pipe side of the heat exchanger, and the water tank inlet are connected in sequence, the shell side of the heat exchanger, the circulating water pump, and the open cooling tower are connected in a circular manner in sequence, and the heat exchanger is a water-to-water heat exchanger.

[0018] Preferably, the second pipeline is connected to the third pipeline on the outlet side of the second stop valve, and the air cooling pipe and / or the heat exchanger inlet is connected to the input pipe on the inlet side of the first stop valve.

[0019] The utility model has the following beneficial effects:

[0020] The utility model utilizes the existing heat source to exchange heat with the spray water in the water collecting tray, and while cooling the high-temperature water, also prevents the collected spray water from freezing, which not only reduces energy consumption but also realizes the utilization of high-temperature water thermal energy;

[0021] The utility model is pollution-free, energy-saving and environmentally friendly, and greatly reduces costs;

[0022] The utility model does not need to stop during antifreeze work, is suitable for winter antifreeze of a continuously operated closed cooling tower, has high efficiency and safety, increases the service life of the main equipment of the cooling tower, and is easy to maintain and promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a closed cooling tower winter antifreeze facility;

[0024] Figure 2 It is a structural schematic diagram of a closed cooling tower winter antifreeze facility with an air cooling system;

[0025] Figure 3 It is a structural schematic diagram of a closed cooling tower winter antifreeze facility with a water cooling system.

[0026] In the figure: 1-frame, 2-heat exchange core, 5-water tank, 6-first stop valve, 7-check valve, 8-second stop valve, 9-third stop valve, 10 circulating water pump, 11-vertical heat exchange core, 12-first fan, 13-spray system, 14-water pump, 15-filler, 16-water collection tray, 17-first pipeline, 18-second pipeline, 19-third pipeline, 31-air cooling pipe, 32-heat exchanger, 41-second fan, 42-open cooling tower, 110-fourth pipeline. DETAILED DESCRIPTION

[0027] 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.

[0028] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection is a non-detachable connection, including but not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but is not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: choose welding connection for fixed connection and hinge connection for detachable connection.

[0029] Specific implementation method 1: Combination Figure 1-Figure 3 The present embodiment is described. A closed cooling tower winter antifreeze facility of the present embodiment comprises a heat exchange core 2, a first pipe 17, a second pipe 18 and a third pipe 19. The heat exchange core 2 is arranged in a water collecting tray 16. The inlets of the first pipe 17, the heat exchange core 2, the second pipe 18, the third pipe 19 and the vertical heat exchange core 11 are connected in sequence. The water collecting tray 16 is a spray water collecting tray. The outlet of the water collecting tray 16 is connected to the spray system 13 through a water pump 14. The utility model utilizes the temperature of high-temperature water (existing heat source) to exchange heat with the spray water in the water collecting tray 16. While cooling the high-temperature water, the collected spray water is also antifreeze, which not only reduces energy consumption, but also realizes the utilization of high-temperature water thermal energy. It is pollution-free, energy-saving and environmentally friendly, and greatly reduces costs. The utility model does not need to be shut down during antifreeze and deicing work. It is suitable for winter antifreeze of continuously running closed cooling towers. It has high efficiency, protects the safety of the cooling tower, increases the service life of the main equipment of the cooling tower, and is easy to maintain and promote.

[0030] Specific implementation method 2: Combination Figure 1-Figure 3 The present embodiment is described. The present embodiment is a closed cooling tower winter antifreeze facility. The heat exchange core 2 is a three-dimensional deformed tube heat exchanger, that is, a spiral coil or a twisted tube coil. The vertical heat exchange core 11 adopts round tubes, elliptical tubes or twisted tubes, among which twisted tubes are preferably used to increase the heat exchange area and efficiency. The main function of the utility model is to cool the fluid inside the vertical heat exchange core 11 and the heat exchange core 2 by spraying water and air to ensure the normal and stable operation of other equipment.

[0031] Specific implementation method three: Combination Figure 1-Figure 3The present embodiment is described. The present embodiment is a closed cooling tower winter antifreeze facility. The closed cooling tower comprises a frame 1, a vertical heat exchange core 11, a first fan 12, a spray system 13, a filler 15 and a water collecting tray 16. The nozzle of the spray system 13, the vertical heat exchange core 11, the filler 15 and the water collecting tray 16 are fixedly mounted on the frame 1 from top to bottom. The nozzle of the spray system 13 is connected to the water pump 14 through the vertical conduit of the spray system 13. The outlet of the vertical heat exchange core 11 is connected to the fourth pipe 110. The nozzle of the spray system 13 and the first fan 12 are fixedly mounted on the upper part of the frame 1. The vertical heat exchange core 11 is the vertical heat exchange core of the closed cooling tower. The function of the closed cooling tower is to cool and dissipate the circulating high-temperature water, wherein the high-temperature hot water enters the heat exchange core 2 through the first pipe 17, and after heat exchange with the spray water in the spray water collecting tray 16, it passes through the second pipe The spray water in the water collecting tray 16 at the bottom is driven by the circulating water pump 14 to flow to the spray system 13 at the top. Through the action of the spray system 13, the spray water evenly covers the surface of the vertical heat exchange core 11 and exchanges heat with the high-temperature hot water in the tube of the vertical heat exchange core 11. The spray water after absorbing heat continues to flow downward by its own gravity and flows through the filler 15. The spray water in the filler 15 exchanges heat with the air driven by the first fan 12. Finally, the air takes away the heat. After cooling, the spray water gathers in the water collecting tray 16 at the bottom to complete a cycle. The spray system 13 allows the spray water to be evenly sprayed on the outer surface of the vertical heat exchange core 11. The air and the spray water flow downward in the same direction. With the help of the wind, the spray water can be more evenly distributed on the outer surface of the vertical heat exchange core 11, and the heat exchange effect is better than that of an ordinary closed cooling tower.

[0032] Specific implementation method four: Combination Figure 1-Figure 3 The present embodiment is described. A closed cooling tower winter antifreeze facility of the present embodiment also includes a water tank 5, a first stop valve 6, a one-way valve 7, a second stop valve 8 and a third stop valve 9. The input pipe is connected to the first pipeline 17 and the third pipeline 19 through a three-way pipe. The first stop valve 6 is installed on the input pipe, the third stop valve 9 is installed on the first pipeline 17, and the second stop valve 8 is installed on the third pipeline 19. The outlet of the vertical heat exchange core 11 is connected to the water tank 5 through a fourth pipeline 110, and the one-way valve 7 is installed on the fourth pipeline 110.

[0033] Specific implementation method five: Combination Figure 1 , Figure 2The present embodiment is described. A closed cooling tower winter antifreeze facility of the present embodiment also includes an air cooling system. The air cooling system includes an air cooling pipe 31 and a second fan 41. The input pipe, the air cooling pipe 31, and the water tank 5 are connected in sequence. The second fan 41 is arranged corresponding to the air cooling pipe 31. The second fan 41 and the air cooling pipe 31 are fixedly installed on the ground through a bracket. The high-temperature water generated by other equipment enters the air-cooled heat exchanger 31, the heat exchange core 2 and / or the vertical heat exchange core 11 through the input pipe, wherein the hot water flow entering the heat exchange core 2 and / or the vertical heat exchange core 11 passes through the first cut-off valve. The first stop valve 6 is controlled. When the hot water flow is small, the heat exchange core 2 and / or the vertical heat exchange core 11 do not need to be operated to meet the requirements, and the first stop valve 6 can be closed. In other cases, the first stop valve 6 is normally open. When the first stop valve 6 is opened, a part of the high-temperature water enters the air-cooling pipe 31, and the air is driven by the second fan 41 to dissipate heat, so that the temperature of the high-temperature water is reduced and collected in the water tank 5. In addition, the remaining high-temperature water passes through the first stop valve 6 and enters the heat exchange core 2 and / or the vertical heat exchange core 11 for cooling. When the ambient temperature is higher than 5°C, the third stop valve 9 is closed, and the second stop valve 9 is closed. When the check valve 8 is opened, the high-temperature water directly enters the vertical heat exchange core 11, and the spray water output by the nozzle of the spray system 13 exchanges heat with the outer wall of the vertical heat exchange core 11. After the temperature of the high-temperature water drops to the set value, it is collected in the water tank 5 through the fourth pipe 110, and then combined with the water cooled by the air cooling system, it is supplied to other equipment through the outlet of the water tank 5 again; when the ambient temperature is lower than 5°C, the spray water collected in the water collection tray 16 has a risk of slow freezing due to its large water body, slow flow speed, and direct contact with low-temperature air. The utility model sets a three-dimensional water collector in the water collection tray 16 to cool the water collection tray 16. The deformable tube heat exchanger is completely immersed in the spray water of the water collecting tray. By opening the third stop valve 9 and closing the second stop valve 8, the high-temperature water first enters the three-dimensional deformable tube heat exchanger, and transfers part of the heat to the spray water in the water collecting tray 6, so that the temperature of the spray water in the water collecting tray 6 is above 0°C. Then the high-temperature water enters the vertical heat exchange core 11 through the second pipe 18 and the third pipe 19, and after further heat dissipation, it is collected in the water tank 5 through the fourth pipe 110, and then combined with the circulating water cooled by the air cooling system, it is re-supplied to other equipment for use, so as to avoid freezing of the spray water and ensure safe operation.

[0034] Specific implementation method six: Combination Figure 1 , Figure 3The present embodiment is described. A closed cooling tower winter antifreeze facility of the present embodiment also includes a water cooling system. The water cooling system includes a heat exchanger 32, an open cooling tower 42 and a circulating water pump 10. The input pipe, the tube side of the heat exchanger 32 and the inlet of the water tank 5 are connected in sequence. The shell side of the heat exchanger 32, the circulating water pump 10 and the open cooling tower 42 are connected in sequence in a cycle. The heat exchanger 32 is a water-to-water heat exchanger. The high-temperature water is cooled in the heat exchanger 32 by the circulating cooling water output by the open cooling tower 42. The fluids exchange heat in the shell side and the tube side. After absorbing heat, the circulating cooling water transfers the heat to the air through the open cooling tower, thereby completing a cycle. This not only solves the problem of freezing of the cooling tower spray water collection tray, but also transfers the heat of the high-temperature water to the air, thereby realizing efficient and continuous operation of the closed cooling tower in winter.

[0035] Specific implementation method seven: Combination Figure 1-Figure 3 To illustrate this embodiment, a closed cooling tower winter antifreeze facility is provided in this embodiment, wherein the second pipe 18 is connected to the third pipe 19 on the outlet side of the second stop valve 8, and the inlet of the air cooling pipe 31 and / or the heat exchanger 32 is connected to the input pipe on the inlet side of the first stop valve 6.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0037] 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 present invention 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 present invention.

Claims

1. A closed cooling tower winter antifreeze facility, characterized in that: The invention comprises a heat exchange core (2), a vertical heat exchange core (11), a spray system (13), a water pump (14), a water collection tray (16), a first pipe (17), a second pipe (18) and a third pipe (19); the heat exchange core (2) is arranged in the water collection tray (16); the first pipe (17), the heat exchange core (2), the second pipe (18), the third pipe (19) and the vertical heat exchange core (11) are connected in sequence; and the water collection tray (16) is connected to the spray system (13) via the water pump (14).

2. A closed cooling tower winter antifreeze facility according to claim 1, characterized in that: The heat exchange core (2) is a three-dimensional deformable tube heat exchanger.

3. A closed cooling tower winter antifreeze facility according to claim 1, characterized in that: It also includes a first fan (12), a filler (15) and a fourth pipe (110). The spray system (13), the vertical heat exchange core (11), the filler (15) and the water collecting tray (16) are installed in sequence from top to bottom. The vertical heat exchange core (11) is connected to the fourth pipe (110), and the first fan (12) is installed at the upper part.

4. A closed cooling tower winter antifreeze facility according to claim 3, characterized in that: The heat exchanger also comprises a water tank (5), a first stop valve (6), a one-way valve (7), a second stop valve (8) and a third stop valve (9); the input pipe is connected to the first pipeline (17) and the third pipeline (19); the first stop valve (6) is installed on the input pipe; the third stop valve (9) is installed on the first pipeline (17); the second stop valve (8) is installed on the third pipeline (19); the outlet of the vertical heat exchange core (11) is connected to the water tank (5) through a fourth pipeline (110); the one-way valve (7) is installed on the fourth pipeline (110).

5. A closed cooling tower winter antifreeze facility according to claim 4, characterized in that: It also includes an air cooling system, which includes an air cooling pipe (31) and a second fan (41). The input pipe, the air cooling pipe (31) and the water tank (5) are connected in sequence, and the second fan (41) is arranged corresponding to the air cooling pipe (31).

6. A closed cooling tower winter antifreeze facility according to claim 4, characterized in that: It also includes a water cooling system, which includes a heat exchanger (32), an open cooling tower (42) and a circulating water pump (10), wherein the input pipe, the pipe side of the heat exchanger (32) and the water tank (5) are connected in sequence, and the shell side of the heat exchanger (32), the circulating water pump (10) and the open cooling tower (42) are cyclically connected.

7. A closed cooling tower winter antifreeze facility according to claim 5 or 6, characterized in that: The second pipeline (18) is connected to the third pipeline (19) on the outlet side of the second stop valve (8), and the inlet of the air cooling pipe (31) and / or the heat exchanger (32) is connected to the input pipe on the inlet side of the first stop valve (6).

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