Aluminum radiator exhaust duct structure of indirect air cooling system

Abstract

The utility model discloses an indirect air cooling system aluminum radiator exhaust pipeline structure relates to the technical field of power plant cooling, and its technical scheme main points are: including exhaust ring pipe, along the circumferential extension of cooling sector, and be located above every cooling triangle, a plurality of flexible connecting pipes are connected respectively exhaust port of every cooling triangle with exhaust ring pipe, exhaust vertical pipe is connected to exhaust ring pipe and extends upward, first bypass is connected to the end of exhaust ring pipe, wherein, exhaust ring pipe has the gradient that drops from the middle to both ends along its extension direction, the access point of flexible connecting pipe on the exhaust port of cooling triangle with exhaust ring pipe is located the lower part of exhaust ring pipe, and is at the height position greater than zero and less than its radius. The utility model discloses a first bypass is set up, and the freezing risk that the stagnation water in exhaust pipeline enters the aluminum radiator is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of power plant cooling technology, and more specifically, it relates to an exhaust pipe structure for an aluminum radiator in an indirect air-cooled system. Background Technology

[0002] In an indirect air-cooled system (air-cooled tower), the cooling triangles, consisting of aluminum radiators and air inlet louvers, are typically arranged in a ring around the perimeter of the air-cooled tower. The air-cooled tower is divided into multiple cooling sectors, each of which is a functional unit composed of several adjacent cooling triangles, sector inlet valves, sector outlet valves, sector drain valves, exhaust risers, exhaust ring pipes, sector inlet ring pipes, sector inlet pipes, sector outlet ring pipes, sector outlet pipes, and sector drain pipes.

[0003] Each cooling triangle in the cooling sector has an exhaust port, which is connected to an exhaust pipe via a flexible metal hose. The exhaust pipes converge through a main pipe and slope upwards from below the widened platform of the air-cooled tower, extending into the tower. This exhaust pipe serves as the highest point in the system. When the cooling sector is operational, it rapidly expels air from other pipes within the cooling sector and from the aluminum radiators of the cooling triangles, causing the liquid level in the exhaust pipe to rise to a certain height. During normal operation, a small amount of air is intermittently released into the atmosphere through the exhaust riser. When the cooling sector is disconnected, air is drawn in through the exhaust pipe, while water within the pipe is rapidly discharged.

[0004] When the cooling sector is not in operation, the circulating water flows under gravity through the exhaust pipe, cooling triangle, sector inlet ring pipe, sector inlet pipe, sector outlet ring pipe, sector outlet pipe, and sector drain pipe, finally draining into the underground water tank. During this process, in the initial drainage stage, gravity dominates the flow, resulting in a relatively fast velocity; however, in the later stages, the water flow is significantly slowed by surface tension and viscosity, leading to stagnant water not being drained in time. In low-temperature winter environments, if stagnant water remains in the exhaust pipe and is not drained promptly, it is prone to overfreezing upon entering the aluminum radiator in the cooling triangle. This can lead to reduced adhesion between the aluminum fins and tubes, affecting heat transfer; or even, in severe cases, the expansion of the ice layer can cause the aluminum tubes to rupture.

[0005] Therefore, a new solution is needed to address this problem. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide an exhaust pipe structure for an aluminum radiator in an indirect air-cooling system. By setting a first bypass, the risk of freezing caused by water trapped in the exhaust pipe entering the aluminum radiator is effectively avoided.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is: an exhaust pipe structure for an aluminum radiator in an indirect air-cooling system, wherein the indirect air-cooling system includes multiple cooling sectors, each cooling sector includes multiple cooling triangles arranged circumferentially along the indirect air-cooling system, and each cooling triangle has an exhaust port at its top; the exhaust pipe structure includes:

[0008] The exhaust ring extends circumferentially along the cooling sector and is located above each of the cooling triangles;

[0009] Multiple flexible connecting pipes are respectively connected to the exhaust port of each of the cooling triangles and the exhaust ring pipe;

[0010] An exhaust riser is connected to the exhaust ring pipe and extends upward;

[0011] The first bypass is connected to the end of the exhaust ring pipe;

[0012] The exhaust ring pipe has a slope that descends from the middle to both ends along its extension direction; the connection point between the flexible connecting pipe on the exhaust port of the cooling triangle and the exhaust ring pipe is located at the lower part of the exhaust ring pipe and at a height greater than zero and less than its radius.

[0013] Preferably, the flexible connecting pipe is a metal hose, and the exhaust ring pipe is provided with a connection port. The two ends of the metal hose are detachably connected to the exhaust port of the cooling triangle and the connection port of the exhaust ring pipe, respectively.

[0014] Preferably, the two ends of the metal hose are detachably connected to the exhaust port of the cooling triangle and the exhaust ring pipe respectively through a flange structure.

[0015] Preferably, the connection point between the flexible connecting pipe of the cooling triangle and the exhaust ring pipe is specifically located at a height of one-third of the diameter of the exhaust ring pipe.

[0016] Preferably, the indirect air-cooling system further includes a widening platform, the exhaust riser is connected to the middle of the exhaust ring pipe, and the extension trajectory of the exhaust riser is located below the widening platform and extends upward with the same slope as the widening platform to a set height inside the tower of the indirect air-cooling system.

[0017] Preferably, the indirect air-cooling system further includes a sector outlet water ring pipe disposed below the cooling sector, the cooling triangle includes a support frame, the first bypass extends downward along the support frame of the cooling triangle after being led out from the end of the exhaust ring pipe, and is connected to the sector outlet water ring pipe.

[0018] Preferably, a sector water outlet pipe is connected to the sector water outlet ring pipe, and a second bypass is connected between the exhaust riser and the sector water outlet pipe.

[0019] Preferably, the exhaust riser is equipped with pipe insulation and pipe heat tracing components.

[0020] Preferably, the second bypass is provided with a pipe insulation component.

[0021] Compared with the prior art, the advantages of the aluminum radiator exhaust pipe structure of the indirect air-cooled system disclosed in this utility model are:

[0022] 1. The exhaust ring pipe of this utility model adopts a slope design that descends from the middle to both ends, and the exhaust riser is designed to extend upwards. On the one hand, it helps to quickly discharge air from the pipe when the cooling sector is in operation, and on the other hand, it facilitates rapid drainage under the action of gravity when the cooling sector is stopped.

[0023] 2. This utility model sets the connection point between the flexible connecting pipe on the exhaust port of the cooling triangle and the exhaust ring pipe at a height position that is greater than zero and less than its radius, specifically at a height position of one-third of the diameter of the exhaust ring pipe, and connects a first bypass at the end of the exhaust ring pipe. When the cooling sector is not in operation, it can ensure that the water trapped in the exhaust riser and exhaust ring pipe is drained, preventing it from entering the aluminum heat sink of the cooling triangle. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic plan view of the exhaust pipe structure of the aluminum radiator in the indirect air-cooled system according to an embodiment of this application.

[0026] Figure 2 This is a three-dimensional structural diagram of the exhaust pipe structure of the aluminum radiator in the indirect air-cooled system according to an embodiment of this application;

[0027] Figure 3 for Figure 2 Enlarged view of part A;

[0028] Figure 4 for Figure 2 Enlarged view of part B.

[0029] The numbers or letters in the attached diagram represent the names of the corresponding components:

[0030] 1. Exhaust riser; 2. Exhaust ring pipe; 3. Cooling triangle; 4. Sector inlet ring pipe; 5. Sector outlet ring pipe; 6. Sector inlet pipe; 7. Sector inlet valve; 8. Sector outlet pipe; 9. Sector outlet valve; 10. Sector drain pipe; 11. Sector drain valve; 12. Metal hose; 13. Pipe insulation; 14. Pipe heat tracing; 15. First bypass; 16. Second bypass. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described through specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] Please see Figure 1 The embodiments of this application provide an exhaust pipe structure for an aluminum radiator in an indirect air-cooling system. The indirect air-cooling system includes multiple cooling sectors, each of which includes multiple cooling triangles 3 arranged circumferentially along the indirect air-cooling system. Each cooling triangle 3 has an exhaust port at its top.

[0033] The cooling sector also includes a sector inlet ring pipe 4 and a sector outlet ring pipe 5 located below the cooling sector. The cooling triangle 3 also includes an inlet connected to the sector inlet ring pipe 4 and an outlet connected to the sector outlet ring pipe 5. A sector inlet pipe 6 is connected to the sector inlet ring pipe 4, and a sector outlet pipe 8 is connected to the sector outlet ring pipe 5. A sector inlet valve 7 is installed on the sector inlet pipe 6, and a sector outlet valve 9 is installed on the sector outlet pipe 8. A sector drain pipe 10 is connected between the sector outlet pipe 8 and the sector inlet pipe 6, downstream of the sector inlet valve 7 and the sector outlet valve 9 (i.e., near the cooling triangle 3). Sector drain valves 11 are installed between the sector drain pipe 10 and the sector inlet pipe 6, and between the sector drain pipe 10 and the sector outlet pipe 8, respectively.

[0034] Please see Figures 2 to 4 The exhaust pipe structure of this application includes an exhaust ring pipe 2, which extends circumferentially along the arcuate trajectory of the cooling sector and is located above each cooling triangle 3. The exhaust ring pipe 2 has a slope that descends from the middle to both ends along its extension direction.

[0035] The exhaust riser 1 is connected to the exhaust ring pipe 2 and extends upward. The indirect air-cooling system also includes a widening platform. The exhaust riser 1 is specifically connected to the middle of the exhaust ring pipe 2. The extension trajectory of the exhaust riser 1 is located below the widening platform and extends upward with the same slope as the widening platform to a set height inside the tower of the indirect air-cooling system.

[0036] In the above method, the slope design of the exhaust ring pipe 2 and the exhaust riser pipe 1 helps to quickly discharge air from the pipe when the cooling sector is put into operation, and facilitates rapid drainage under gravity when the cooling sector is shut down.

[0037] Multiple flexible connecting pipes connect the exhaust port of each cooling triangle 3 to the exhaust ring pipe 2. Specifically, the flexible connecting pipe is a flexible metal hose 12. The exhaust ring pipe 2 has a connection port. Both ends of the flexible metal hose 12 are detachably connected to the exhaust port of the cooling triangle 3 and the connection port of the exhaust ring pipe 2 via flange structures. The flange structure includes two flanges and bolts for connecting and fixing the two flanges. The connection point between the flexible connecting pipe on the exhaust port of the cooling triangle 3 and the exhaust ring pipe 2 is located at the lower part of the exhaust ring pipe 2, at a height greater than zero and less than its radius, specifically at a height of one-third of the diameter of the exhaust ring pipe 2. This prevents stagnant water, i.e., a small amount of residual coolant, from entering the cooling triangle 3 through the flexible connecting pipe. During installation, the flexible metal hose 12 must be naturally straight and sloped downwards towards the exhaust port of the cooling triangle 3.

[0038] The first bypass 15 is a bypass pipe connected to the end of the exhaust ring pipe 2. The cooling triangle 3 also includes a support frame. After the first bypass 15 is led out from the end of the exhaust ring pipe 2, it extends downward along the support frame of the cooling triangle 3 and connects to the sector outlet ring pipe 5. When the cooling sector is not in operation, it can ensure that the water trapped in the exhaust riser 1 and exhaust ring pipe 2 is drained, preventing it from entering the aluminum heat sink of the cooling triangle 3.

[0039] A second bypass 16 connects the exhaust riser 1 to the sector outlet pipe 8. The exhaust riser 1 includes a horizontal rising section, and the second bypass 16 is specifically connected to the end of the horizontal rising section of the exhaust riser 1. The indirect air-cooled system can be a concrete tower or a steel tower. The second bypass 16 descends along the X-column of the concrete tower or the lattice column of the steel tower and connects to the sector outlet pipe 8. By setting the second bypass 16, under the action of pressure difference, the stagnant circulating water entering the exhaust riser 1 will naturally flow downward into the sector outlet pipe 8, turning the stagnant water in the exhaust riser 1 into flowing water, which is beneficial to improving the antifreeze capability of the exhaust pipe structure.

[0040] To further improve the antifreeze performance of the exhaust pipe structure, a pipe insulation component 13 and a pipe heat tracing component 14 are installed on the exhaust riser 1, and a pipe insulation component 13 is installed on the second bypass 16. The pipe heat tracing component 14 is a heat tracing cable, and the pipe insulation component 13 is an insulation sleeve.

[0041] The working principle of this utility model is as follows:

[0042] When the cooling sector is put into operation (i.e., water filling and venting), the sector inlet valve 7 and sector outlet valve 9 are opened, and the sector drain valve 11 is closed. The circulating water is divided into two paths: one path enters the sector inlet pipe 6, sector inlet ring pipe 4, and cooling triangle 3, and the other path enters the sector outlet pipe 8, sector outlet ring pipe 5, and cooling triangle 3. The circulating water after entering the cooling triangle 3 then enters the exhaust riser 1 through the exhaust ring pipe 2 and metal hose 12 to discharge a large amount of air in the system from the exhaust riser 1.

[0043] When the cooling sector is operating normally, the sector inlet valve 7 and sector outlet valve 9 are opened, and the sector drain valve 11 is closed. The circulating hot water flows through the sector inlet pipe 6 and sector inlet ring pipe 4, and exchanges heat with the ambient air in the cooling triangle 32. The cooled circulating cold water passes through the sector outlet ring pipe 5 and sector outlet pipe 8 in sequence. At this time, the air in the cooling triangle 3 intermittently gathers and is discharged into the atmosphere through the exhaust riser 1.

[0044] When the cooling sector is out of operation, the sector inlet valve 7 and sector outlet valve 9 are closed, the sector drain valve 11 is opened, and the circulating water is discharged in two stages. In the first stage, most of the water in the exhaust riser 1 and exhaust ring pipe 2 flows through the cooling triangle 3, sector inlet ring pipe 4, sector inlet pipe 6, sector outlet ring pipe 5, and sector outlet pipe 8, and is discharged to the sector drain pipe 10. In the second stage, when the liquid level in the exhaust ring pipe 2 is lower than the connection point between the flexible connecting pipe on the exhaust port of the cooling triangle 3 and the exhaust ring pipe 2, the remaining water is discharged through the first bypass 15 to the sector outlet ring pipe 5, and finally to the sector drain pipe 10. A large amount of air is drawn in through the exhaust pipe, and finally all the water in the system is drained.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An exhaust pipe structure for an aluminum radiator in an indirect air-cooling system, the indirect air-cooling system comprising multiple cooling sectors, each cooling sector comprising multiple cooling triangles arranged circumferentially along the indirect air-cooling system, each cooling triangle having an exhaust port at its apex, characterized in that, The exhaust pipe structure includes: The exhaust ring extends circumferentially along the cooling sector and is located above each of the cooling triangles; Multiple flexible connecting pipes are respectively connected to the exhaust port of each of the cooling triangles and the exhaust ring pipe; An exhaust riser is connected to the exhaust ring pipe and extends upward; The first bypass is connected to the end of the exhaust ring pipe; The exhaust ring pipe has a slope that descends from the middle to both ends along its extension direction; the connection point between the flexible connecting pipe on the exhaust port of the cooling triangle and the exhaust ring pipe is located at the lower part of the exhaust ring pipe and at a height greater than zero and less than its radius.

2. The exhaust pipe structure of the aluminum radiator in the indirect air-cooled system according to claim 1, characterized in that: The flexible connecting pipe is a metal hose, and the exhaust ring pipe is provided with a connection port. The two ends of the metal hose are detachably connected to the exhaust port of the cooling triangle and the connection port of the exhaust ring pipe, respectively.

3. The exhaust pipe structure of the aluminum radiator in the indirect air-cooled system according to claim 2, characterized in that: The two ends of the metal hose are detachably connected to the exhaust port of the cooling triangle and the exhaust ring pipe respectively through flange structures.

4. The exhaust pipe structure of the aluminum radiator in the indirect air-cooled system according to claim 1, characterized in that: The connection point between the flexible connecting pipe of the cooling triangle and the exhaust ring pipe is specifically located at a height of one-third of the diameter of the exhaust ring pipe.

5. The exhaust pipe structure of the aluminum radiator in the indirect air-cooled system according to claim 1, characterized in that: The indirect air-cooling system also includes a widening platform, the exhaust riser is connected to the middle of the exhaust ring pipe, and the extension trajectory of the exhaust riser is located below the widening platform and extends upward with the same slope as the widening platform to a set height inside the tower of the indirect air-cooling system.

6. The exhaust pipe structure of the aluminum radiator in the indirect air-cooled system according to claim 1, characterized in that: The indirect air-cooling system also includes a sector outlet water ring pipe disposed below the cooling sector. The cooling triangle includes a support frame. The first bypass extends downward along the support frame of the cooling triangle after being led out from the end of the exhaust ring pipe, and is connected to the sector outlet water ring pipe.

7. The exhaust pipe structure of the aluminum radiator in the indirect air-cooled system according to claim 6, characterized in that: The sector water outlet ring pipe is connected to the sector water outlet pipe, and a second bypass is connected between the exhaust riser and the sector water outlet pipe.

8. The exhaust pipe structure of the aluminum radiator in the indirect air-cooled system according to claim 1, characterized in that: The exhaust riser is equipped with pipe insulation and pipe heat tracing components.

9. The exhaust pipe structure of the aluminum radiator in the indirect air-cooled system according to claim 7, characterized in that: The second bypass is equipped with pipe insulation components.

Images