A cooling tower freeze protection device

Abstract

This application discloses a cooling tower antifreeze device. The cooling tower is equipped with an antifreeze device, which includes a heat source, a cooler, and a heat sink. The inlet and outlet of the cooler are connected to the heat source and the heat sink, respectively. The heat source is used to transfer heat to the cooler. The cooler is installed in a circulating water tank and is used to cool the heat and transfer it to the heat sink. The heat sink is used to transfer heat to the cooling tower. A first heat sink structure is installed between the cooling fan and the spray device, a second heat sink structure is installed at the air inlet, and a third heat sink structure is installed in the packing area. This solution effectively prevents the cooling tower from operating normally due to component freezing in cold environments by distributing the heat sinks in different key areas of the cooling tower, thereby improving the reliability and service life of the cooling tower. At the same time, it provides antifreeze protection for the circulating water tank, cooling fan, spray device, packing area, and other parts.

Description

Technical Field

[0001] This application relates to the field of antifreeze technology, and in particular to an antifreeze device for cooling towers. Background Technology

[0002] In extremely cold northern regions, the daily maximum temperature may be below 0°C for several consecutive months. Flowing water can have a certain resistance to freezing by adjusting its flow rate. The water flow rate inside the packing and in the circulating water pool is relatively slow, and water vapor drifts into the upper space of the cooling tower. The cooling tower generally starts to freeze from this part, especially from the packing, the area above the cooling tower spray device to the fan outlet. Water vapor drifts to the steel structure, fan blades, and outlet, where it is most likely to freeze.

[0003] Currently, there are various technologies for cooling tower antifreeze and de-icing, such as ultrasonic de-icing, vibration de-icing, scraper de-icing, laser de-icing, solar energy storage de-icing, heated steel structure de-icing, steam drum heating de-icing, de-icing using the heat from the plant's pipe network condensate, and adjusting the size of the air inlet of the baffle plate to prevent freezing. Existing cooling tower antifreeze methods are mostly de-icing or heating to melt ice, which has significant limitations. On the one hand, these devices are expensive and mostly designed for closed-circuit cooling towers, limiting their applicability. On the other hand, solar de-icing devices are severely affected by weather conditions and only address ice buildup on the equipment surface after it has formed. Utility Model Content

[0004] The main purpose of this application is to propose a cooling tower antifreeze device, which aims to solve the problem that existing cooling towers are prone to freezing at low temperatures.

[0005] To achieve the above objectives, this application proposes a cooling tower antifreeze device. The cooling tower, from top to bottom, includes: an air outlet, a cooling fan, a spray device, a packing area, an air inlet, and a circulating water tank. The cooling tower is equipped with an antifreeze device, which includes: a heat source, a cooler, and a heat radiator. The inlet and outlet of the cooler are respectively connected to the heat source and the heat radiator. The heat source is used to transfer heat to the cooler. The cooler is disposed in the circulating water tank and is used to cool down the heat and transfer it to the heat radiator. The heat radiator is used to transfer heat to the cooling tower.

[0006] The heat sink includes a first heat sink structure, a second heat sink structure and a third heat sink structure. The first heat sink structure is disposed between the cooling fan and the spray device, the second heat sink structure is disposed at the air inlet, and the third heat sink structure is disposed in the packing area.

[0007] Optionally, the heat source is industrial flue gas, which is transported to the chimney through a flue gas exhaust pipe. A flue gas exhaust fan is installed in the middle of the flue gas exhaust pipe. The cooler is connected to the flue gas exhaust pipe near the outlet of the flue gas exhaust fan through a first conveying pipe. The cooler is connected to the flue gas exhaust pipe near the inlet of the flue gas exhaust fan through a second conveying pipe. A regulating valve is installed on both the first and second conveying pipes.

[0008] Optionally, the cooler, the first heat dissipation structure, the second heat dissipation structure, and the third heat dissipation structure are all composed of pipes with a tube-panel structure.

[0009] Optionally, the cooler includes two parallel connecting pipes, a first connecting pipe and a second connecting pipe, and a plurality of evenly distributed cooling pipes are connected between the first connecting pipe and the second connecting pipe. The cooling pipes have an S-shaped tube screen structure in the middle. The first connecting pipe is connected to the first conveying pipe, and the second connecting pipe is connected to the first heat dissipation structure through a third conveying pipe.

[0010] Optionally, the first heat dissipation structure includes two parallel third connecting pipes and a fourth connecting pipe, and a plurality of uniformly distributed first heat dissipation pipes are connected between the third connecting pipe and the fourth connecting pipe. The middle of the first heat dissipation pipe is an S-shaped pipe screen structure. The third connecting pipe is connected to the third conveying pipe, and the fourth connecting pipe is connected to the second conveying pipe.

[0011] Optionally, the second heat dissipation structure includes a plurality of second heat dissipation pipes, which are evenly arranged at the air inlet. Both ends of the plurality of second heat dissipation pipes are connected to the third or fourth connecting pipe, and the middle of the second heat dissipation pipes is a tube-screen structure with an S-shaped distribution.

[0012] Optionally, a temperature gauge is installed on the third conveying pipe.

[0013] Optionally, the diameter of the smoke exhaust duct is Φ500mm, and the diameter of the duct in the tube-screen structure is Φ38mm.

[0014] Optionally, the cooler is arranged horizontally on the surface of the circulating water tank.

[0015] This application's technical solution involves equipping the cooling tower with an anti-freezing device. The anti-freezing device includes a heat source, a cooler, and a heat sink. The inlet and outlet of the cooler are connected to the heat source and the heat sink, respectively. The heat source supplies heat to the cooler, which is located in a circulating water tank. The cooler cools the heat and transfers it to the heat sink, which then transfers heat to the cooling tower. The heat sink includes a first heat sink structure, a second heat sink structure, and a third heat sink structure. The first heat sink structure is located between the cooling fan and the spray device, the second heat sink structure is located at the air inlet, and the third heat sink structure is located in the packing area. The heat source supplies heat to the cooler... The cooling unit transfers heat, cooling the heat before transferring it to the heat exchanger. The first heat exchanger structure heats the area between the cooling fan and the spray device, the second heat exchanger structure heats the air inlet, and the third heat exchanger structure heats the packing area, thus achieving antifreeze protection for different parts of the cooling tower. By distributing heat exchangers in different key areas of the cooling tower, this solution can effectively prevent the cooling tower from being affected by component freezing in cold environments, thus improving the reliability and service life of the cooling tower. At the same time, it also provides antifreeze protection for parts such as the circulating water tank, cooling fan, spray device, and packing area. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the cooling tower antifreeze device of this application;

[0018] Figure 2 This is a schematic diagram of the cooling tower antifreeze device on the side of the cooling tower in this application;

[0019] Figure 3 This is a schematic diagram of the cooling tower antifreeze device inside the cooling tower in this application;

[0020] Figure 4 This is a top view of the cooling tower antifreeze device of this application on the cooling tower.

[0021] Figure 5 This is a perspective structural diagram of the cooling tower antifreeze device of this application.

[0022] Explanation of icon numbers:

[0023] 1. Cooling tower; 101. Air outlet; 102. Cooling fan; 103. Spraying device; 104. Packing area; 105. Air inlet; 106. Circulating water tank; 2. Cooler; 201. First connecting pipe; 202. Cooling pipe; 203. Second connecting pipe; 3. Heat sink; 310. First heat sink structure; 311. Fourth connecting pipe; 312. Third connecting pipe; 313. First heat sink pipe; 320. Second heat sink structure; 321. Second heat sink pipe; 4. Exhaust pipe; 5. Chimney; 6. Exhaust fan; 7. First conveying pipe; 8. Second conveying pipe; 9. Regulating valve; 10. Third conveying pipe; 11. Thermometer; 12. Waste heat boiler; 13. Flue gas purification device.

[0024] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0029] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0030] Currently, there are various technologies for cooling tower antifreeze and de-icing, such as ultrasonic de-icing, vibration de-icing, scraper de-icing, laser de-icing, solar energy storage de-icing, heated steel structure de-icing, steam drum heating de-icing, de-icing using the heat from the plant's pipe network condensate, and adjusting the size of the air inlet of the baffle plate to prevent freezing. Existing cooling tower antifreeze methods are mostly de-icing or heating to melt ice, which has significant limitations. On the one hand, these devices are expensive and mostly designed for closed-circuit cooling towers, limiting their applicability. On the other hand, solar de-icing devices are severely affected by weather conditions and only address ice buildup on the equipment surface after it has formed.

[0031] In view of this, this application proposes a cooling tower antifreeze device.

[0032] In the embodiments of this application, reference is made to Figures 1 to 5The aforementioned cooling tower antifreeze device, wherein the cooling tower 1, from top to bottom, includes: an air outlet 101, a cooling fan 102, a spray device 103, a packing area 104, an air inlet 105, and a circulating water tank 106. The cooling tower 1 is equipped with an antifreeze device, which includes: a heat source, a cooler 2, and a radiator 3. The inlet and outlet of the cooler 2 are connected to the heat source and the radiator 3, respectively. The heat source is used to transfer heat to the cooler 2. The cooler 2 is installed in the circulating water tank 106 and is used to cool down the heat and transfer it to the radiator. 3. Heat sink 3 is used to transfer heat to cooling tower 1. Heat sink 3 includes a first heat sink structure 310, a second heat sink structure 320 and a third heat sink structure. The first heat sink structure 310 is located between the cooling fan 102 and the spray device 103. The second heat sink structure 320 is located at the air inlet 105 and the third heat sink structure is located in the packing area 104. The heat provided by the heat source is used to adjust the temperature through the cooler 2, and then the heat sink 3 distributes the heat to the key parts of the cooling tower 1 to prevent these parts from freezing due to low temperature. Cooler 2 is installed in the circulating water tank 106. It can use the water in the tank to cool the heat to a certain extent and deliver it to the heat sink 3 at a suitable temperature. By setting up a special anti-freeze device and distributing the heat sink 3 in different key areas of the cooling tower 1, it can effectively prevent the cooling tower 1 from being affected by the freezing of components in cold environments, thereby improving the reliability and service life of the cooling tower 1. At the same time, it also protects the circulating water tank 106, cooling fan 102, spray device 103, packing area 104 and other parts.

[0033] refer to Figure 1 The heat source is industrial exhaust gas, which is transported to the chimney 5 through exhaust pipe 4. An exhaust fan 6 is installed in the middle of exhaust pipe 4. Cooler 2 is connected to the exhaust pipe 4 near the outlet of exhaust fan 6 through first conveying pipe 7. Cooler 3 is connected to the exhaust pipe 4 near the inlet of exhaust fan 6 through second conveying pipe 8. Regulating valves 9 are installed on both first conveying pipe 7 and second conveying pipe 8. Industrial exhaust gas is transported through exhaust pipe 4 and exhaust fan 6. Cooler 2 obtains heat from the exhaust pipe 4 near the outlet of exhaust fan 6 through first conveying pipe 7. After cooling, the heat is transported back to the exhaust pipe 4 near the inlet of exhaust fan 6 through second conveying pipe 8. The exhaust gas continues to be discharged, and the heat transported is used for antifreeze of cooling tower 1.

[0034] By using industrial flue gas as a heat source, the waste heat originally emitted during industrial production is rationally utilized. Through pipeline connections and valve control, the waste heat is transferred and utilized, providing heat to cooling tower 1 without affecting the normal emission of flue gas. This fully utilizes the waste heat resources in industrial production, turning waste into treasure, reducing energy consumption, reducing the demand for additional energy, and at the same time reducing the heat loss from direct flue gas emissions to a certain extent, realizing the secondary utilization of energy and having good energy-saving and environmental protection benefits.

[0035] It should be noted that in seasons when antifreeze is not required, the regulating valve 9 near the exhaust fan 6 outlet is closed to isolate the heat source. After the flue gas in the cooler 2 and radiator 3 is drawn out by the negative pressure of the exhaust fan 6 and the antifreeze device is cooled to room temperature, the regulating valve 9 near the exhaust fan 6 inlet is closed to deactivate the device. The operation and deactivation of this device will not affect the operation of the waste heat power generation device and the cooling tower 1.

[0036] Because some industrial emissions produce high-temperature flue gas—specifically, the flue gas from a glass kiln is around 500ºC—a waste heat boiler 12 is installed in the exhaust duct 4 before the exhaust fan 6 to better utilize the heat of the flue gas and reduce its temperature. This boiler is used to rationally utilize the heat of the flue gas and reduce its temperature to 130°C–160°C. A flue gas purification device 13 is connected to the waste heat boiler 12 to purify pollutants (SOx, NOx, VOCs, dust, HCl, HF, etc.) in the flue gas. The flue gas purification device 13 minimizes air pollution and prevents SOx from corroding the pipes during the low-temperature flue gas process.

[0037] refer to Figure 2 , Figure 3 and Figure 4 Cooler 2, first heat dissipation structure 310, second heat dissipation structure 320, and third heat dissipation structure are all composed of pipes of the tube-screen type structure. The tube-screen type structure has a large heat dissipation area, which can improve heat transfer efficiency and make the internal heat more effectively dissipated to the surrounding environment, thereby heating and preventing freezing of the corresponding parts of cooling tower 1, enhancing the performance and effect of the antifreeze device, and ensuring stable operation of cooling tower 1 in low temperature environment.

[0038] refer to Figure 5The cooler 2 includes two parallel connecting pipes 201 and 203. Multiple evenly distributed cooling pipes 202 are connected between the first connecting pipe 201 and the second connecting pipe 203. The middle of the cooling pipes 202 has an S-shaped tube screen structure. The first connecting pipe 201 is connected to the first conveying pipe, and the second connecting pipe 203 is connected to the first heat dissipation structure 310 through the third conveying pipe 10. Heat enters the first connecting pipe 201 from the first conveying pipe, and then is transferred to the second connecting pipe 203 through the multiple cooling pipes 202. The S-shaped tube screen structure in the middle of the cooling pipes 202 exchanges heat with the water in the circulating water tank 106. After the heat temperature is reduced, it is transported to the first heat dissipation structure 310 through the third conveying pipe 10. This structural design improves the cooling effect, makes the temperature of the transported heat more controllable, and also makes fuller use of the cooling effect of the circulating water tank 106, ensuring the stable operation of the entire antifreeze device.

[0039] refer to Figure 5 The first heat dissipation structure 310 includes two parallel third connecting pipes 312 and fourth connecting pipes 311. Multiple evenly distributed first heat dissipation pipes 313 connect the third connecting pipes 312 and fourth connecting pipes 311. The middle of each first heat dissipation pipe 313 has an S-shaped tube-screen structure. The third connecting pipe 312 connects to the third conveying pipe 10, and the fourth connecting pipe 311 connects to the second conveying pipe 8. Heat from the third conveying pipe 10 enters the third connecting pipe 312 and is then transferred to the fourth connecting pipe 311 through the multiple first heat dissipation pipes 313. The S-shaped tube-screen structure in the middle of the first heat dissipation pipes 313 dissipates heat to the area between the cooling fan 102 and the spray device 103. Finally, the flue gas enters the second conveying pipe 8 through the fourth connecting pipe 311. This structure can centrally heat the area between the cooling fan 102 and the spray device 103, preventing freezing in this area due to low temperatures and ensuring the normal operation of both the cooling fan 102 and the spray device 103.

[0040] refer to Figure 5 The second heat dissipation structure 320 includes multiple second heat dissipation pipes 321, which are evenly arranged at the air inlet 105. Both ends of the multiple second heat dissipation pipes 321 are connected to a third connecting pipe 312 or a fourth connecting pipe 311. The middle of the second heat dissipation pipes 321 has an S-shaped tube screen structure. Heat enters the multiple second heat dissipation pipes 321 evenly arranged at the air inlet 105 through the third connecting pipe 312 or the fourth connecting pipe 311. The S-shaped tube screen structure in the middle of the second heat dissipation pipes 321 dissipates heat to the air inlet 105 area, heating the air inlet 105 and effectively preventing the air inlet 105 from freezing in a low-temperature environment, thus ensuring smooth airflow in the cooling tower 1.

[0041] It should be noted that the third heat dissipation structure is connected to the second delivery pipe 8, and its specific structure and working principle are the same as those of the first heat dissipation structure.

[0042] refer to Figure 1 A thermometer 11 is installed on the third conveying pipe 10. The thermometer 11 monitors the temperature of the fluid in the third conveying pipe 10 in real time and displays the temperature value. This allows the operator to keep track of the temperature of the flue gas entering the radiator 3 in real time and adjust the heat output or other relevant parameters of the heat source in a timely manner to ensure that the heat delivered to the radiator structure is at a suitable temperature and avoid affecting the antifreeze effect and equipment safety due to excessively high or low temperatures.

[0043] Specifically, the diameter of the exhaust duct 4 is Φ500mm, and the diameter of the tube-screen structure duct is Φ38mm. The diameter of the exhaust duct 4 determines the volume and velocity of the flue gas, while the diameter of the tube-screen structure duct affects the heat transfer efficiency and heat dissipation area. The dimensions of the two are matched to ensure the effective transport and utilization of waste heat, enabling the flue gas to be transported smoothly. At the same time, the tube-screen structure duct can efficiently transfer and dissipate heat, optimizing the performance of the entire antifreeze device and improving energy utilization efficiency and antifreeze effect.

[0044] Specifically, the cooler 2 is horizontally arranged on the water surface of the circulating water tank 106. The cooler 2, which is horizontally arranged on the water surface, can contact the water in the circulating water tank 106 to the maximum extent. The cooling effect of the water is used to cool down the heat in the cooler 2, so that the heat temperature is reduced to a suitable range before being transferred to the heat sink 3.

[0045] This application's technical solution involves equipping the cooling tower with an anti-freezing device. The anti-freezing device includes a heat source, a cooler, and a heat sink. The inlet and outlet of the cooler are connected to the heat source and the heat sink, respectively. The heat source supplies heat to the cooler, which is located in a circulating water tank. The cooler cools the heat and transfers it to the heat sink, which then transfers heat to the cooling tower. The heat sink includes a first heat sink structure, a second heat sink structure, and a third heat sink structure. The first heat sink structure is located between the cooling fan and the spray device, the second heat sink structure is located at the air inlet, and the third heat sink structure is located in the packing area. The heat source supplies heat to the cooler... The cooling unit transfers heat, cooling the heat before transferring it to the heat exchanger. The first heat exchanger structure heats the area between the cooling fan and the spray device, the second heat exchanger structure heats the air inlet, and the third heat exchanger structure heats the packing area, thus achieving antifreeze protection for different parts of the cooling tower. By distributing heat exchangers in different key areas of the cooling tower, this solution can effectively prevent the cooling tower from being affected by component freezing in cold environments, thus improving the reliability and service life of the cooling tower. At the same time, it also provides antifreeze protection for parts such as the circulating water tank, cooling fan, spray device, and packing area.

[0046] The above description is merely an optional embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A cooling tower antifreeze device, wherein the cooling tower comprises, from top to bottom: The cooling tower comprises an air outlet, a cooling fan, a spray device, a packing area, an air inlet, and a circulating water tank. The cooling tower is characterized by an anti-freezing device comprising: a heat source, a cooler, and a heat sink. The inlet and outlet of the cooler are respectively connected to the heat source and the heat sink. The heat source is used to transfer heat to the cooler. The cooler is disposed in the circulating water tank and is used to cool the heat and transfer it to the heat sink. The heat sink is used to transfer heat to the cooling tower. The heat sink includes a first heat sink structure, a second heat sink structure and a third heat sink structure. The first heat sink structure is disposed between the cooling fan and the spray device, the second heat sink structure is disposed at the air inlet, and the third heat sink structure is disposed in the packing area.

2. The cooling tower antifreeze device as described in claim 1, characterized in that, The heat source is industrial flue gas, which is transported to the chimney through a flue gas duct. A flue gas fan is installed in the middle of the flue gas duct. The cooler is connected to the flue gas duct near the outlet of the flue gas fan through a first conveying pipe. The heat sink is connected to the flue gas duct near the inlet of the flue gas fan through a second conveying pipe. Regulating valves are installed on both the first and second conveying pipes.

3. The cooling tower antifreeze device as described in claim 2, characterized in that, The cooler, the first heat dissipation structure, the second heat dissipation structure, and the third heat dissipation structure are all composed of pipes with a tube-panel structure.

4. The cooling tower antifreeze device as described in claim 3, characterized in that, The cooler includes two parallel connecting pipes, a first connecting pipe and a second connecting pipe, and multiple evenly distributed cooling pipes connecting the first connecting pipe and the second connecting pipe. The cooling pipes have an S-shaped tube screen structure in the middle. The first connecting pipe is connected to the first conveying pipe, and the second connecting pipe is connected to the first heat dissipation structure through a third conveying pipe.

5. The cooling tower antifreeze device as described in claim 4, characterized in that, The first heat dissipation structure includes two parallel third connecting pipes and a fourth connecting pipe. Multiple evenly distributed first heat dissipation pipes are connected between the third connecting pipes and the fourth connecting pipes. The middle of the first heat dissipation pipes is an S-shaped pipe screen structure. The third connecting pipe is connected to the third conveying pipe, and the fourth connecting pipe is connected to the second conveying pipe.

6. The cooling tower antifreeze device as described in claim 5, characterized in that, The second heat dissipation structure includes multiple second heat dissipation pipes, which are evenly arranged at the air inlet. Both ends of the multiple second heat dissipation pipes are connected to the third or fourth connecting pipe, and the middle of the second heat dissipation pipes is a tube-screen structure with an S-shaped distribution.

7. The cooling tower antifreeze device as described in claim 5, characterized in that, A temperature gauge is installed on the third conveying pipeline.

8. The cooling tower antifreeze device as described in claim 3, characterized in that, The diameter of the exhaust duct is Φ500mm, and the diameter of the duct in the tube-screen structure is Φ38mm.

9. The cooling tower antifreeze device according to any one of claims 1 to 8, characterized in that, The cooler is arranged horizontally on the surface of the circulating water tank.

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