Water-saving cooling tower with strong heat exchange effect

Abstract

The present application relates to cooling tower technical field, specifically disclose a water-saving cooling tower with strong heat exchange effect, including parallelly arranged water collecting disc at the bottom, finned tube heat exchanger installed on the top of the water collecting disc, wet cooling section cooler connected to the finned tube heat exchanger for heat exchange, and one or more cooling fan and spray water distribution pipe laid on the wet cooling section cooler; The present application is mainly used for air conditioning unit, its structure can reduce the air wet bulb temperature into the tower, so as to obtain lower outlet water temperature, improve the efficiency of air conditioning unit; At the same time, in winter, it can run in air cooling mode, and there is no evaporation loss in the whole tower; Compared with the traditional dry and wet cooling tower, the cooling tower has the effect of winter stopping spraying and saving water, the finned tube is arranged outside the air inlet face coaming, and only exchanges heat with dry ambient air during the heat exchange process, so that the finned tube is not corroded, and the service life of the cooling tower is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cooling tower technology, in particular to a water-saving cooling tower with strong heat exchange effect. BACKGROUND

[0002] The closed cooling tower, also known as evaporative air cooler and closed cooling tower, places the tube heat exchanger in the tower to ensure the cooling effect through the heat exchange between the flowing air, spray water and circulating water. Since it is a closed cycle, it can ensure that the water quality is not polluted, thus protecting the efficient operation of the main equipment and improving the service life.

[0003] The working principle of the conventional closed cooling tower is as follows: the circulating water enters the coil cooler, the spray water is uniformly sprayed from the upper end of the tube bundle and falls on the upper end of the coil; on the other hand, the fan at the top of the tower continuously draws air. Evaporation and convective heat exchange occur between air, spray water and cooler, which cools the fluid in the cooler pipe. From the route of the spray water, on the one hand, since evaporation heat exchange occurs between the spray water and the ambient air, the temperature of the spray water cannot be reduced below the ambient wet-bulb temperature, which seriously restricts the use effect of the closed cooling tower in summer, especially for air conditioning units. The lower the cooling tower water temperature, the lower the energy consumption of the air conditioning unit. On the other hand, the cooling tower evaporates a large amount of spray water in winter, causing serious evaporation loss. Based on this, we propose a water-saving cooling tower with strong heat exchange effect. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a water-saving cooling tower with strong heat exchange effect to solve the problems raised in the background art.

[0005] The water-saving cooling tower with strong heat exchange effect of the present application comprises a water collecting tray arranged in parallel at the bottom, a finned tube heat exchanger installed at the top of the water collecting tray, a wet cooling section cooler connected to the finned tube heat exchanger for heat exchange, a spray water distribution pipe laid on the wet cooling section cooler and one or more cooling fans.

[0006] The finned tube heat exchanger is arranged in a surrounding manner on the outside of the wet cooling section cooler; and is used for heat exchange of the spray water.

[0007] A cooler water outlet pipe is arranged at a position close to the lower side of the wet cooling section cooler, and a cooler water inlet pipe is symmetrically arranged at a position close to the upper side, for realizing the circulation of the spray water.

[0008] As a further improvement of the present application, one end of the cooler water inlet pipe is provided with a cooler circulating water outlet valve A, and a dry cooling section three-way pipe is arranged below the cooler circulating water outlet valve A.

[0009] As a further improvement of the application, one end of the dry cooling section tee pipe is connected with a cooler circulating water outlet B, and a dry cooling section circulating water inlet pipe is arranged at one end of the cooler circulating water outlet B.

[0010] As a further improvement of the application, a spray water inlet pipe is arranged in the middle of the pipe body of the dry cooling section circulating water inlet pipe, and a heat exchanger spray water outlet valve is arranged at the other end.

[0011] As a further improvement of the application, one end of the heat exchanger spray water outlet valve is connected with a heat exchanger water inlet pipe arranged in parallel with the spray water distribution pipe, and arranged above the finned tube heat exchanger.

[0012] As a further improvement of the application, a spray water pump is arranged at one side of the water collecting tray, and a water pump switch valve is arranged at the top of the spray water pump, and the water pump switch valve is connected with the heat exchanger water inlet pipe wound on the finned tube heat exchanger.

[0013] As a further improvement of the application, a dry cooling section circulating water outlet valve is arranged at one end of the heat exchanger water inlet pipe, and a heat exchanger spray water inlet valve is arranged at the other end, for controlling the water inflow of the heat exchanger water inlet pipe.

[0014] As a further improvement of the application, a water collecting device is arranged between the wet cooling section cooler and the cooling fan, and a groove adapted to one or more cooling fans is arranged at the top of the water collecting device, for fixing the cooling fan.

[0015] Compared with the prior art, the application has the following beneficial effects:

[0016] The application is mainly used for air conditioning units, and the structure can reduce the wet bulb temperature of the air entering the tower, so as to obtain a lower outlet water temperature and improve the efficiency of the air conditioning unit; in winter, the cooling tower can be operated in the air cooling mode, and there is no evaporation loss in the whole tower; compared with the traditional dry and wet cooling tower, the cooling tower has the effect of water saving in winter, the finned tube is arranged outside the air inlet face coaming, and only the dry ambient air is exchanged in the heat exchange process, so that the corrosion of the finned tube is avoided, and the service life of the cooling tower is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the application, and constitute a part of the application. The schematic embodiments of the application and the description thereof are used to explain the application, and do not constitute an improper limitation on the application. In the drawings:

[0018] Figure 1 It is a combined structure schematic view of the cooling fan, the wet cooling section cooler, the finned tube heat exchanger and the water collecting tray of the application;

[0019] Figure 2The combined side view structural schematic diagram of the cooling fan, the wet cooling section cooler, the finned tube heat exchanger and the water collecting tray of the application;

[0020] Figure 3 The structural schematic diagram of the summer operation state of the application;

[0021] Figure 4 The structural schematic diagram of the winter operation state of the application.

[0022] In the figure: 1, water collecting tray; 2, spraying water pump; 3, water pump switch valve; 4, heat exchanger spraying water inlet valve; 5, dry cooling section circulating water outlet valve; 6, heat exchanger water inlet pipe; 7, finned tube heat exchanger; 8, heat exchanger spraying water outlet valve; 9, dry cooling section circulating water inlet pipe; 10, dry cooling section three-way pipe; 11, cooler circulating water outlet valve A; 12, cooler circulating water outlet B; 13, cooler water outlet pipe; 14, wet cooling section cooler; 15, spraying water inlet pipe; 16, spraying water distribution pipe; 17, water collector; 18, cooling fan. DETAILED DESCRIPTION

[0023] In the following, multiple embodiments of the application will be disclosed with figures, and many details of the physical objects will be described in the following description. However, it should be understood that these details of the physical objects should not be used to limit the application. That is, in some embodiments of the application, these details of the physical objects are not necessary. In addition, for the purpose of simplifying the figures, some conventional structures and components will be drawn in a simple schematic manner in the figures.

[0024] In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that a person skilled in the art can realize it. When the combination of technical solutions contradicts each other or cannot be realized, it should be considered that the combination of technical solutions does not exist and is not within the protection scope required by the application.

[0025] Please refer to Figure 1 and Figure 2 When the conventional closed cooling tower is operated, it is found that the lower the cooling tower water temperature drop is, the less the energy consumption of the air conditioning unit is. However, in actual use, when the cooling tower is operated in winter, a large amount of spraying water is evaporated, causing serious evaporation loss. Based on this, the application provides a water-saving cooling tower with enhanced heat exchange effect, which comprises a water collecting tray 1 arranged in parallel at the bottom, a finned tube heat exchanger 7 arranged on the top of the water collecting tray 1, a wet cooling section cooler 14 connected to the finned tube heat exchanger 7 for heat exchange, and a spraying water distribution pipe 16 and one or more cooling fans 18 arranged on the wet cooling section cooler 14;

[0026] Specifically, the finned tube heat exchanger 7 in the application is arranged in a surrounding manner on the outside of the wet cooling section cooler; and is used for heat exchange of spraying water;

[0027] In this embodiment, the spray water is first sprayed into the finned tube heat exchanger 7 and then into the spray water distribution pipe 16, sprayed on the surface of the wet cooling section heat exchanger, and finally returned to the water collecting tray 1 after heat exchange. In this process, the spray water exchanges heat with the air by evaporation. In summer, the dry-bulb temperature of the air is high, and the wet-bulb temperature is usually 5-7℃ lower than the dry-bulb temperature. Under normal circumstances, the temperature of the spray water falling on the finned tube heat exchange layer can approach the wet-bulb temperature and be lower than the dry-bulb temperature of the environment. During the upward transport of the spray water, the spray water first passes through the finned tube, and at this time the temperature of the spray water in the tube is lower than the dry-bulb temperature of the environment. The environment air exchanges heat with the spray water through the finned tube, and after heat exchange, the dry-bulb temperature of the environment air decreases, but the humidity of the air does not change, so the wet-bulb temperature decreases.

[0028] Further, the wet cooling section cooler 14 is provided with a cooler outlet water pipe 13 near the lower position on one side and a cooler inlet water pipe symmetrically arranged near the upper position, for realizing the circulation of the spray water.

[0029] In summer operation, the main function of the cooling tower is to reduce the wet-bulb temperature of the inlet air to obtain a lower circulating water outlet temperature. At this time, the spray water pump 2 is opened, and the spray water pump 2 switch valve, the heat exchanger spray water inlet valve 4, the heat exchanger spray water outlet valve 8, and the cooler circulating water outlet valve A11 are opened. The dry cooling section circulating water outlet valve 5 and the cooler circulating water outlet B12 are closed. At this time, the operation pipeline of the cooling tower is as shown in Figure 3 .

[0030] Please refer to Figure 3 and Figure 4 , the requirements and states of use are different in summer and winter. Based on the use needs in summer and winter and based on the spray water use principle described above, in the present application, one end of the cooler inlet water pipe is provided with a cooler circulating water outlet valve A11, and the lower side of the cooler circulating water outlet valve A11 is provided with a dry cooling section three-way pipe 10.

[0031] Specifically, one end of the dry cooling section three-way pipe 10 in the present application is connected with a cooler circulating water outlet B12, and one end of the cooler circulating water outlet B12 is provided with a dry cooling section circulating water inlet pipe 9.

[0032] The dry cooling section three-way pipe 10 provides convenience for the connection of the cooler circulating water outlet B12 and the dry cooling section circulating water inlet pipe 9, and facilitates use;

[0033] Further, the middle part of the pipe body of the dry cooling section circulating water inlet pipe 9 is provided with a spray water inlet pipe 15, and the other end is provided with a heat exchanger spray water outlet valve 8.

[0034] In this embodiment, the heat exchanger spray water outlet valve 8 is matched with the spray water inlet pipe 15 to control the water flow, meeting the use requirements.

[0035] To meet the installation and use requirements of the spray water distribution pipe 16, the heat exchanger inlet pipe 6 parallel to the spray water distribution pipe 16 is connected to one end of the heat exchanger spray water outlet valve 8 and is arranged above the finned tube heat exchanger 7.

[0036] In addition, the spray water pump 2 is arranged on one side of the water collecting tray 1, the water pump switch valve 3 is arranged on the top of the spray water pump 2, and the heat exchanger inlet pipe 6 wound on the finned tube heat exchanger 7 is connected above the water pump switch valve 3.

[0037] The water pump switch valve 3 can be controlled automatically by electricity or manually, and the automatic control by electricity is preferred from the use perspective, the sensor is used to monitor the data, and the control requirement is realized through the unified scheduling of the central control room.

[0038] Further, the dry cooling section circulating water outlet valve 5 is connected to one end of the heat exchanger inlet pipe 6 of the application, and the heat exchanger spray water inlet valve 4 is arranged at the other end to control the water flow of the heat exchanger inlet pipe 6.

[0039] Meanwhile, the water collector 17 is arranged between the wet cooling section cooler 14 and the cooling fan 18, the recess matched with one or more cooling fans 18 is arranged on the top of the water collector 17 to fix the cooling fan 18.

[0040] In the above embodiment, in the summer use state, the dry-bulb temperature of air is relatively high in summer, and the wet-bulb temperature is usually 5-7℃ lower than the dry-bulb temperature, and the temperature of the spray water falling to the finned tube heat exchange layer can approach the wet-bulb temperature and be lower than the dry-bulb temperature of the environment under normal circumstances.

[0041] In the process of conveying the spray water upward, the spray water first passes through the finned tube heat exchanger 7, at this time, the temperature of the spray water in the tube is lower than the dry-bulb temperature of the environment, the environment air and the spray water are exchanged through the finned tube heat exchanger 7, the dry-bulb temperature of the environment air decreases after the heat exchange, and the humidity of the air does not change, so the wet-bulb temperature decreases.

[0042] When the cooling tower is operated in winter, the main function of the cooling tower is to stop spraying the spray water, run the whole tower dry section, and have no evaporation loss, at this time, the spray water pump 2 is closed, the spray water inlet valve 4 of the finned tube heat exchanger 7, the dry cooling section circulating water outlet valve 5, the heat exchanger spray water outlet valve 8, the cooler circulating water outlet B12 are opened, the switch valve of the spray water pump 2, the dry cooling section circulating water outlet valve 5, and the cooler circulating water outlet valve A11 are closed, and the running state is as followsFigure 4 as shown;

[0043] At this time, the whole tower has no spray water, the wet cooling section heat exchanger and the dry cooling section heat exchanger are connected in series, the circulating water first enters the wet cooling section heat exchanger to exchange heat, and then enters the air cooling section heat exchanger to exchange heat, the whole tower runs in the air cooling mode, and the whole tower has no evaporation loss.

[0044] The above merely describes the embodiments of the present application but is not intended to limit the present application. The present application can be changed and modified in various ways by those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A water-saving cooling tower with strong heat exchange effect, comprising a water collection tray arranged in parallel at the bottom, a finned tube heat exchanger installed on the top of the water collection tray, a wet cooling section cooler connected to the finned tube heat exchanger for heat exchange, and spray water pipes laid on the wet cooling section cooler and one or more cooling fans. Its features are: The finned tube heat exchanger is arranged in an encircling shape on the outside of the wet cooling section cooler; it is used to exchange heat with the spray water. The cooler has a cooler outlet pipe located near the bottom on one side of the wet cooling section cooler, and a cooler inlet pipe located symmetrically near the top, for circulating the spray water.

2. The water-saving cooling tower with strong heat exchange effect according to claim 1, characterized in that: A cooler circulating water outlet valve A is provided at one end of the cooler inlet pipe, and a dry cooling section tee is provided below the cooler circulating water outlet valve A.

3. A water-saving cooling tower with strong heat exchange effect according to claim 2, characterized in that: One end of the dry cooling section tee is connected to the cooler circulating water outlet B, and a dry cooling section circulating water inlet pipe is provided at one end of the cooler circulating water outlet B.

4. A water-saving cooling tower with strong heat exchange effect according to claim 3, characterized in that: The dry cooling section circulating water inlet pipe is equipped with a spray water inlet pipe in the middle of the pipe body, and a heat exchanger spray water outlet valve is installed at the other end.

5. A water-saving cooling tower with strong heat exchange effect according to claim 4, characterized in that: One end of the heat exchanger spray water outlet valve is connected to the heat exchanger inlet pipe, which is arranged parallel to the spray water pipe and is coiled around the top of the finned tube heat exchanger.

6. A water-saving cooling tower with strong heat exchange effect according to claim 1, characterized in that: A spray water pump is installed on one side of the water collection tray, and a water pump switch valve is installed on the top of the spray water pump. The top of the water pump switch valve is connected to the heat exchanger inlet pipe wound on the finned tube heat exchanger.

7. A water-saving cooling tower with strong heat exchange effect according to claim 5, characterized in that: One end of the heat exchanger inlet pipe is connected to the dry cooling section circulating water outlet valve, and the other end is equipped with a heat exchanger spray water inlet valve, which is used to control the inlet water flow rate of the heat exchanger inlet pipe.

8. A water-saving cooling tower with strong heat exchange effect according to claim 1, characterized in that: A water collector is provided between the wet cooling section cooler and the cooling fan. The top of the water collector is provided with a groove adapted to one or more cooling fans for fixing the cooling fans.

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