A cooling tower auxiliary cooling system

Abstract

This utility model discloses an auxiliary cooling system for an indirect cooling tower, relating to the field of energy engineering technology. It includes an indirect cooling tower, a porous permeable structure, and a water supply system. The porous permeable structure comprises a water flow channel and vent holes, with the water flow channel connected to the vent holes. The porous permeable structure is positioned on the air inlet path of the cooling triangle of the indirect cooling tower. The water supply system is connected to the porous permeable structure. In this utility model, the water supply system and the porous permeable structure work together to form a water curtain on the air inlet path of the cooling triangle. The temperature of the gas entering the indirect cooling tower is significantly reduced as it passes through the water curtain, thus achieving the purpose of cooling the indirect cooling tower. The cooling process does not require direct water spraying onto the fins of the cooling triangle, avoiding the problem of dirt adhering to the fin surface, which could lead to reduced heat exchange efficiency and economic losses later on.

Description

Technical Field

[0001] This utility model relates to the field of energy engineering technology, and in particular to an auxiliary cooling system for an intercooling tower. Background Technology

[0002] Indirect cooling towers are the main cooling devices for circulating water in thermal power units. They consist of radiators and a tower. The radiators are finned heat dissipation tube bundles, which are vertically arranged below the tower and circumferentially combined to form a cooling triangle. In existing technologies, the cooling triangle is cooled by direct spraying. The working environment of the cooling triangle is an open environment. During the spraying process, dust, slag, and other impurities from the external environment accumulate in the spray water, causing the water quality to gradually deteriorate. Eventually, obvious fouling occurs on the fins of the cooling triangle, causing irreversible damage to the fins. This leads to a significant reduction in heat exchange efficiency, affecting the service life of the fins and reducing the cooling effect of the indirect cooling tower, thus impacting the normal operation of the thermal power unit and causing huge economic losses.

[0003] Therefore, there is an urgent need for a cooling system that will not damage the fins of the cooling triangle. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary cooling system for indirect cooling towers to solve the problems existing in the prior art. A porous permeable structure and a water supply system are set in the air inlet path of the cooling triangle so that the air is cooled as it passes through the porous permeable structure.

[0005] To achieve the above objectives, the present invention provides the following solution: The present invention provides an auxiliary cooling system for an indirect cooling tower, comprising: an indirect cooling tower, a porous permeable structure, and a water supply system. The porous permeable structure includes a water flow channel and a vent hole. The water flow channel is connected to the vent hole. The porous permeable structure is disposed on the air inlet path of the cooling triangle of the indirect cooling tower. The water supply system is connected to the porous permeable structure.

[0006] Preferably, the system also includes a water recycling tank, with a water collection ditch located below the porous permeable structure. The inlet of the water recycling tank is connected to the water collection ditch, and the outlet of the water recycling tank is connected to the water supply system.

[0007] Preferably, the water supply system includes a water supply tank located above the porous permeable structure, the water supply tank being connected to the recycling tank via a recycling pump, and the water supply tank being connected to the porous permeable structure.

[0008] Preferably, the water supply tank is equipped with a liquid level measuring device, which is electrically connected to the recovery pump through a control system.

[0009] Preferably, the recycled water tank is connected to a water source via a water replenishment pump, and a second liquid level measuring device is installed inside the recycled water tank. The second liquid level measuring device is electrically connected to the water replenishment pump through the control system.

[0010] Preferably, it also includes a heat exchange bracket and a mounting frame, the heat exchange bracket being arranged around the periphery of the cooling triangle, one side of the mounting frame being hinged to the heat exchange bracket, and the porous permeable structure being mounted on the mounting frame.

[0011] Preferably, the water supply system is equipped with a water supply nozzle at its outlet.

[0012] Preferably, it also includes a shading component, which includes support columns spaced apart around the periphery of the indirect cooling tower, a support mechanism between adjacent support columns, a shading net on the support mechanism, and a tensioning mechanism on the support columns for controlling the contraction or expansion of the shading net. The shading net is spaced apart from the porous permeable structure.

[0013] Preferably, the shading component further includes a light-sensing component, which is electrically connected to the stretching mechanism via a control system.

[0014] Preferably, it also includes an auxiliary air supply system, wherein the air supply path of the auxiliary air supply system is the same as the air intake path.

[0015] Compared with the prior art, this utility model mainly achieves the following technical effects: the water supply system can provide cooling water to the porous permeable structure. The cooling water enters the interior of the porous permeable structure through the water flow channel to form a water curtain. The water flow channel is connected to the vent holes. Under the negative pressure inside the cooling tower, the outside air passes through the vent holes and enters the cooling tower through the water curtain. During the process of the outside air passing through the water curtain quickly, the cooling water in the water curtain absorbs the heat in the air and removes a large amount of heat through evaporation, so that the temperature of the air passing through the water curtain drops rapidly, thereby achieving the purpose of cooling the cooling tower. There is no need to spray water directly on the fins of the cooling triangle throughout the process, avoiding the problem of dirt adhering to the fin surface, which leads to a reduction in heat exchange efficiency and economic losses in the later stage. Attached Figure Description

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

[0017] Figure 1 This is a schematic diagram of the present invention;

[0018] Figure 2 This utility model Figure 1 A top-down view;

[0019] Figure 3 This is a schematic diagram showing the combination of the water supply system and the porous permeable structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the sunshade component of this utility model;

[0021] Figure 5 This utility model Figure 4 A top-down view;

[0022] Figure 6 This is a schematic diagram showing the combination of the porous permeable structure of this utility model and the water supply nozzle;

[0023] The components include: 1. Indirect cooling tower; 2. Porous permeable structure; 3. Water supply system; 4. Recycled water tank; 5. Water collection ditch; 6. Water supply tank; 7. Recycled pump; 8. Liquid level measuring device one; 9. Make-up water pump; 10. Liquid level measuring device two; 11. Heat exchange bracket; 12. Mounting frame; 13. Water supply nozzle; 14. Shading assembly; 15. Support column; 16. Support mechanism; and 17. Cooling triangle. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] The purpose of this invention is to provide an auxiliary cooling system for indirect cooling towers to solve the problems existing in the prior art. By forming a water curtain on the air intake path of the cooling triangle through a porous permeable structure and a water supply system, the system cools the air entering the indirect cooling tower.

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Please refer to the following: Figure 1-6As shown, an auxiliary cooling system for an indirect cooling tower is provided, including an indirect cooling tower 1, a porous permeable structure 2, and a water supply system 3. The porous permeable structure 2 is disposed on the air inlet path of the cooling triangle 17 of the indirect cooling tower 1. The water outlet of the water supply system 3 is connected to the water inlet of the porous permeable structure 2, providing cooling water to the porous permeable structure 2. The porous permeable structure 2 includes a water flow channel and vent holes. Under the action of gravity, the cooling water can permeate from top to bottom through the water flow channel to form a water curtain. The vent holes allow external air to pass through the porous permeable structure 2, and the water flow channel is connected to the vent holes. In actual use, under the action of the water supply system 3, the porous permeable structure 2 can effectively cool the air inlet path of the cooling triangle 17 of the indirect cooling tower 1. A water curtain is formed along the airflow path. As the hot air inside the indirect cooling tower 1 rises, a negative pressure is generated at the bottom of the indirect cooling tower 1. Under the action of negative pressure, the outside air passes through the air vents of the porous permeable structure 2 and enters the indirect cooling tower 1. During the process of the outside air passing through the water curtain, the cooling water absorbs the heat in the air and removes a large amount of heat through evaporation, so that the temperature of the air passing through the water curtain drops rapidly, thereby achieving the technical effect of cooling the indirect cooling tower 1. The entire cooling process does not require direct spraying of water onto the fins of the cooling triangle. On the one hand, it extends the service life of the fins, and on the other hand, it ensures the long-term stable operation of the indirect cooling tower 1, ensuring the normal operation of the thermal power unit. This also avoids the problem of reduced heat exchange efficiency and economic losses caused by dirt adhering to the fin surface.

[0028] It should be noted that the cooling triangle 17 is formed by multiple fins and forms a serrated structure, and the porous water-permeable structure 2 is arranged around the outer periphery of the cooling triangle 17.

[0029] like Figure 1-6 As shown, the porous permeable structure 2 in this application is a honeycomb filter paper, wherein the water flow channel is the capillary channel inside the honeycomb filter paper, and the air pore is the honeycomb-shaped hole of the honeycomb filter paper.

[0030] Those skilled in the art will understand that the porous permeable structure 2 in this application can also be a filler made of a material with strong water permeability and air permeability, such as ceramsite or slag. Of course, the containment structure used to contain the above-mentioned filler material can allow gas to enter and pass through the porous permeable structure 2. In this case, the pores inside the filler material and the gaps between the filler materials can together serve as water flow channels or air vents.

[0031] As a preferred embodiment, the system also includes a recycling tank 4. A water collection ditch 5 is provided below the porous permeable structure 2. The inlet of the recycling tank 4 is connected to the outlet of the water collection ditch 5, and the outlet of the recycling tank 4 is connected to the inlet of the water supply system 3. During use, under the influence of gravity, the cooling water entering the porous permeable structure 2 passes through the porous permeable structure 2 from top to bottom and finally flows into the water collection ditch 5 below the porous permeable structure 2. It is then collected in the recycling tank 4 for reuse. When needed, the cooling water in the recycling tank 4 can be returned to the top of the porous permeable structure 2 via the water supply system 3 to enter the next cycle, thus achieving the technical effect of reducing water consumption.

[0032] Furthermore, the water supply system 3 includes a water supply tank 6, which is located above the porous permeable structure 2. The water supply tank 6 is connected to the recovery water tank 4 via a recovery pump 7 and is also connected to the porous permeable structure 2. The water supply tank 6 can store a certain amount of cooling water. Since the water supply tank 6 is located above the porous permeable structure 2, the cooling water stored inside the water supply tank 6 can automatically flow into the porous permeable structure 2 under the action of gravity. This eliminates the need for a separate pressurization structure, thus providing cooling water to the porous permeable structure 2 and reducing energy consumption.

[0033] Preferably, a liquid level measuring device 8 is installed inside the water supply tank 6. The liquid level measuring device 8 is electrically connected to the recovery pump 7 through the control system. The liquid level measuring device 8 can monitor the cooling water level in the water supply tank 6. When the cooling water level in the water supply tank 6 is lower than the preset value, the liquid level measuring device 8 transmits a signal to the control system, which then controls the recovery pump 7 to start and store water in the water supply tank 6. When the cooling water level in the water supply tank 6 is higher than the preset value, the liquid level measuring device 8 transmits a signal to the control system, which then controls the recovery pump 7 to stop. This process repeats continuously, ensuring that the water supply system 3 can continuously provide cooling water to the porous permeable structure 2. At the same time, the recovery pump 7 operates intermittently, reducing energy consumption in the water supply project.

[0034] The outlet of the recycling water tank 4 is also equipped with a filter screen to filter the water in the recycling water tank 4, thereby reducing impurities in the water flow.

[0035] Even better, the recovery water tank 4 is connected to the water source via the water replenishment pump 9. A level measuring device 2 10 is installed inside the recovery water tank 4, and this device is electrically connected to the water replenishment pump 9 via a control system. Since the cooling water continuously evaporates during the air cooling process, and the evaporation rate is greatly affected by the external environment, it is necessary to replenish the recovery water tank 4 with new water from time to time to ensure the continuous cooling process. The level measuring device 2 10 can monitor the cooling water level in the recovery water tank 4. When the cooling water level in the recovery water tank 4 is lower than the preset value, the level measuring device 2 10 transmits a signal to the control system, which then controls the water replenishment pump 9 to start, filling the recovery water tank 4 with water. When the cooling water level in the recovery water tank 4 is higher than the preset value, the level measuring device 2 10 transmits a signal to the control system, which then controls the water replenishment pump 9 to stop, thus avoiding the problem of insufficient cooling water to support the continuous cooling process due to evaporation.

[0036] It is understandable that in actual applications, staff can make adaptive adjustments to the preset value of the cooling water level according to their needs, and no specific limitations are made here.

[0037] As a preferred embodiment, the indirect cooling tower auxiliary cooling system also includes a heat exchange bracket 11 and a mounting frame 12. The heat exchange bracket 11 is arranged around the periphery of the cooling triangle 17. One side of the mounting frame 12 is hinged to the heat exchange bracket 11. The porous permeable structure 2 is installed on the mounting frame 12, so that the entire porous permeable structure 2 can be opened or closed like a door with the hinge axis as the rotation center, so as to facilitate later inspection and maintenance. If necessary, a locking structure can also be set on the mounting frame 12. The locking structure can prevent the mounting frame 12 from rotating relative to the heat exchange bracket 11 when it is not needed to be opened, thus ensuring the stability of the porous permeable structure 2 during normal heat dissipation.

[0038] Preferably, the outlet of the water supply system 3 is equipped with a water supply nozzle 13, which ensures the uniformity of cooling water at each location of the porous permeable structure 2.

[0039] Please see Figure 4-5 It also includes a shading component 14, which includes support columns 15 spaced apart around the periphery of the cooling tower 1. A support mechanism 16 is provided between adjacent support columns 15. A shading net is provided on the support mechanism 16. A tensioning mechanism is provided on the support columns 15. The tensioning mechanism can control the shading net to contract or open. When sunlight gradually shines on the cooling triangle 17 or the porous permeable structure 2, opening the shading net can play a role in sun protection, avoiding the problem of reduced cooling effect of the auxiliary cooling system due to sun exposure. In order to prevent the shading net from drawing water out of the porous permeable structure 2, the shading net and the porous permeable structure 2 are spaced apart to ensure that the shading net does not come into contact with the porous permeable structure 2.

[0040] It should be noted that each adjacent support column 15 is equipped with an independent sunshade curtain, and each sunshade curtain is equipped with a tensioning mechanism and a support mechanism.

[0041] The support mechanism is a guide rail set between adjacent support columns 15. The guide rail is equipped with a fixed slider and a sliding slider. The fixed slider is set close to one of the support columns 15, and the sliding slider can slide on the guide rail and slide as far as the other support column 15. One end of the sunshade is connected to the fixed slider, and the other end of the sunshade is connected to the sliding slider. The tensioning mechanism is an electric push rod set on the support column 15. The telescopic end of the electric push rod is connected to the slider, and the end of the electric push rod away from the telescopic end is fixedly connected to the support column 15. The sliding of the slider on the guide rail is realized by the extension and retraction of the electric push rod, thereby realizing the extension, retraction or opening of the sunshade.

[0042] The support mechanism can also be a support steel wire rope set between adjacent support columns 15. A sunshade net is threaded through the support steel wire rope via a steel ring. One end of the sunshade net is fixedly connected to one of the support columns 15, and the other end of the sunshade net is a free end that can slide on the support steel wire rope. The tensioning mechanism is a rack set between adjacent support columns 15. The rack is set above the support steel wire rope and has a sliding motor. The output shaft of the sliding motor has a gear that meshes with the rack. The bottom of the sliding motor is connected to the steel ring at the free end of the sunshade. When the sliding motor drives the gear to rotate, the meshing of the gear and the rack can cause the sliding motor to move the free end of the sunshade on the rack, thereby realizing the extension and retraction and opening of the sunshade.

[0043] Alternatively, the support mechanism can be a support steel wire rope installed between adjacent support columns 15. A sunshade net is threaded onto the support steel wire rope via steel rings. One end of the sunshade net is fixedly connected to one of the support columns 15, and the other end of the sunshade net is a free end that can slide on the support steel wire rope. The tensioning mechanism includes a first winding motor and a second winding motor respectively installed on two adjacent support columns 15, a first traction rope wound around the output end of the first winding motor, and a second traction rope wound around the second winding motor. The first winding motor is located near the sunshade curtain. The first and second traction ropes are both connected to the steel ring at the free end of the sunshade. When the sunshade needs to be closed, the first winding motor drives the sunshade to close by rewinding the first traction rope. At this time, the second winding motor unwinds the second traction rope to extend it and prevent it from being broken. When the sunshade needs to be opened, the second winding motor drives the sunshade to close by rewinding the second traction rope. At this time, the first winding motor unwinds the first traction rope.

[0044] Both the first and second traction ropes are parallel to the supporting steel wire rope, ensuring that the tension on the steel ring is parallel to the supporting steel wire rope, thus ensuring the smooth opening and closing of the sunshade.

[0045] Of course, the shade net should be made of a breathable mesh structure to avoid affecting the air intake effect.

[0046] Furthermore, the shading component 14 also includes a light-sensing component. The light-sensing component is electrically connected to the stretching mechanism through the control system. The light-sensing component can sense light. When sunlight shines on the light-sensing component, the light-sensing component transmits a signal to the control system, which controls the stretching mechanism to open the shading net to prevent sunlight from directly hitting the cooling triangle 17 or the porous permeable structure 2. When sunlight can no longer reach the light-sensing component, the light-sensing component controls the stretching mechanism through the control system to retract the shading net, thus realizing the automatic opening and closing of the shading net.

[0047] As a preferred embodiment, an auxiliary air supply system is also included. The air supply path of the auxiliary air supply system is the same as the air inlet path of the porous permeable structure 2. The auxiliary air supply system can increase the speed of the outside air passing through the porous permeable structure 2, which increases the amount of cold air entering the intercooling tower 1 on the one hand, and increases the evaporation rate of the cooling water on the other hand, thus achieving the technical effect of further improving the cooling rate of the intercooling tower 1.

[0048] The auxiliary air supply system can be a blower installed between the porous permeable structure 2 and the cooling triangle 17 to accelerate the speed of outside air passing through the porous permeable structure 2.

[0049] It is understood that the solution protected by this utility model is also applicable to the auxiliary cooling of the air-cooled island in air-cooled island units.

[0050] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0051] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An auxiliary cooling system for an indirect cooling tower, characterized in that, include: The cooling tower (1), the porous permeable structure (2), and the water supply system (3) are provided. The porous permeable structure (2) includes a water flow channel and a vent hole. The water flow channel is connected to the vent hole. The porous permeable structure (2) is located on the air inlet path of the cooling triangle (17) of the cooling tower (1). The water supply system (3) is connected to the porous permeable structure (2).

2. The intercooling tower auxiliary cooling system according to claim 1, characterized in that: It also includes a water recycling tank (4), and a water collection ditch (5) is provided below the porous permeable structure (2). The water recycling tank (4) is connected to the water collection ditch (5), and the water recycling tank (4) is connected to the water supply system (3).

3. The auxiliary cooling system for an indirect cooling tower according to claim 2, characterized in that: The water supply system (3) includes a water supply tank (6), which is located above the porous permeable structure (2). The water supply tank (6) is connected to the recycling tank (4) via a recycling pump (7). The water supply tank (6) is also connected to the porous permeable structure (2).

4. The auxiliary cooling system for an indirect cooling tower according to claim 3, characterized in that: The water supply tank (6) is equipped with a liquid level measuring device (8), which is electrically connected to the recovery pump (7) through a control system.

5. The auxiliary cooling system for an indirect cooling tower according to claim 4, characterized in that: The recycling tank (4) is connected to the water source through the water replenishment pump (9). The recycling tank (4) is equipped with a liquid level measuring device (10), which is electrically connected to the water replenishment pump (9) through the control system.

6. The auxiliary cooling system for an indirect cooling tower according to claim 1, characterized in that: It also includes a heat exchange bracket (11) and a mounting frame (12), the heat exchange bracket (11) being arranged around the periphery of the cooling triangle (17), one side of the mounting frame (12) being hinged to the heat exchange bracket (11), and the porous permeable structure (2) being mounted on the mounting frame (12).

7. The auxiliary cooling system for an indirect cooling tower according to claim 1, characterized in that: The water supply system (3) is equipped with a water supply nozzle (13) at its outlet.

8. The auxiliary cooling system for an indirect cooling tower according to claim 1, characterized in that: It also includes a shading assembly (14), which includes support columns (15) spaced apart around the outside of the indirect cooling tower (1), a support mechanism (16) between adjacent support columns (15), a shading net on the support mechanism (16), and a tensioning mechanism on the support column (15) for controlling the shrinking or opening of the shading net. The shading net is spaced apart from the porous permeable structure (2).

9. The auxiliary cooling system for an indirect cooling tower according to claim 8, characterized in that: The shading component (14) also includes a light-sensing component, which is electrically connected to the stretching mechanism via a control system.

10. The intercooling tower auxiliary cooling system according to claim 1, characterized in that: It also includes an auxiliary air supply system, the air supply path of which is the same as the air intake path.

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