CN218916000U

CN218916000U - Air cooling flow guiding device for power station

Info

Publication number: CN218916000U
Application number: CN202320123383.6U
Authority: CN
Inventors: 李小强; 杨永宏; 宋宝军; 陈文龙; 韩军; 齐志鹏
Original assignee: Shouhang High Tech Energy Technology Co ltd; Shaanxi Qingshuichuan Energy Co ltd
Current assignee: Shouhang High Tech Energy Technology Co ltd; Shaanxi Qingshuichuan Energy Co ltd
Priority date: 2023-01-17
Filing date: 2023-01-17
Publication date: 2023-04-25
Anticipated expiration: 2033-01-17

Abstract

The application provides a power station air cooling guiding device, including fan, crane span structure and guide plate, the fan include fan main part and fan platform, the fan main part install in the below of fan platform, the fan platform is equipped with the ventilation hole, the air outlet of fan main part with the ventilation hole is relative, the crane span structure is followed the diameter direction in ventilation hole extends, the both ends of crane span structure set up in the border in ventilation hole, the guide plate is followed the length direction in crane span structure extends just the guide plate with the crane span structure flushes, the lower extreme of guide plate set up in on the crane span structure, the upper end of guide plate outwards buckles in order to guide the outside dispersion of air current. The heat exchanger reduces the temperature of the lower part of the heat exchanger, relieves the condition of local temperature rise of the heat exchanger, and optimizes the heat exchange effect of the heat exchanger.

Description

Air cooling flow guiding device for power station

Technical Field

The application relates to the technical field of power station heat exchange, in particular to a power station air cooling flow guiding device.

Background

The direct air-cooled heat exchanger is a commonly used heat exchanger form for power stations. The traditional direct air-cooling heat exchanger exchanges heat between steam discharged by a steam turbine and air so as to play a role in cooling.

As shown in fig. 1, the heat exchanger is composed of a plurality of heat exchange tubes, the heat exchange tubes are erected into an angle shape (inverted V shape), the fan is arranged below the heat exchanger, and generated air flows upwards through the ventilation openings to exchange heat with the heat exchange tubes.

Most of the air flow blown out from the ventilation opening directly reaches the middle upper part of the heat exchange tube, so that the heat exchange effect of the middle upper part of the heat exchange tube is better. However, the air flow cannot directly reach the lower part of the heat exchange tube, and particularly, local vortex flow occurs at four corners of the lower part of the angle (circles in fig. 1), so that the air flow cannot pass through the corners, and the local temperature rise occurs. Therefore, we propose a power station air cooling flow guiding device capable of relieving the local temperature rise of the heat exchanger.

Disclosure of Invention

The utility model provides a power station air cooling guiding device reduces the temperature of the lower part of heat exchanger, alleviates the circumstances that heat exchanger local temperature risees, optimizes the heat transfer effect of heat exchanger.

In order to solve the technical problems, the application adopts the following technical scheme:

the utility model provides a power station air cooling guiding device, includes fan, crane span structure and guide plate, the fan include fan main part and fan platform, the fan main part install in the below of fan platform, the fan platform is equipped with the ventilation hole, the air outlet of fan main part with the ventilation hole is relative, the crane span structure is followed the diameter direction in ventilation hole extends, the both ends of crane span structure set up in the border in ventilation hole, the guide plate is followed the length direction of crane span structure extends just the guide plate with the crane span structure flushes, the lower extreme of guide plate set up in on the crane span structure, the upper end of guide plate outwards buckles in order to guide the outside dispersion of air current.

When the fan is in operation, air flow generated by the fan main body is blown upwards, enters the upper part of the fan platform from the vent hole, is located outside the bridge frame, and is continuously and directly blown upwards to exchange heat with the heat exchanger, and air flow located below the bridge frame is blown to the lower surface of the bridge frame and then is dispersed to the two sides, and then is blown upwards to the guide plate and is dispersed outwards under the guide effect of the guide plate, so that the air flow is blown outwards, the lower part of the heat exchanger is reached, the heat exchange is carried out with the lower part of the heat exchanger, and the local overheating condition of the heat exchanger is relieved.

Compared with the prior art, the air cooling guide device for the power station can guide air flow through the guide plate, so that the air flow is outwards dispersed under the action of the guide plate, reaches the lower region of the heat exchanger, exchanges heat with the lower region of the heat exchanger, reduces the temperature of the lower portion of the heat exchanger, relieves the condition of local temperature rise of the heat exchanger, and optimizes the heat exchange effect of the heat exchanger.

In an embodiment of the present application, the baffle includes a first sub-baffle and a second sub-baffle, and the second sub-baffle is located above the first sub-baffle.

In an embodiment of the present application, the cross section of the first sub-baffle is a quarter of an ellipse, and the cross section of the second sub-baffle is a quarter of a circle.

In an embodiment of the present application, the major axis of the ellipse is twice the minor axis, and the diameter of the circle is equal to the minor axis of the ellipse.

In an embodiment of the present application, a first folded edge is disposed at an upper end of the first sub-baffle, the first folded edge extends obliquely downward, and a second folded edge is disposed at an upper end of the second sub-baffle, and the second folded edge extends obliquely downward.

In an embodiment of the present application, the included angles between the first folded edge, the second folded edge and the horizontal plane are all 5 degrees to 15 degrees.

In an embodiment of the present application, the first sub-deflector and the second sub-deflector are two, two of the first sub-deflectors are symmetrically disposed with respect to the bridge frame, and two of the second sub-deflectors are symmetrically disposed with respect to the bridge frame.

In an embodiment of the present application, the first sub-baffle and the second sub-baffle are both made of glass fiber reinforced plastic or stainless steel.

In an embodiment of the present application, the thicknesses of the first sub-baffle and the second sub-baffle are each 2mm to 5mm.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a conventional heat exchanger;

FIG. 2 is a cloud chart of temperature distribution obtained by CFD simulation software of a conventional heat exchanger;

fig. 3 is a schematic perspective view of a power station air cooling and guiding device according to an embodiment of the present disclosure;

fig. 4 is a schematic front view of a power station air cooling and guiding device according to an embodiment of the present application;

fig. 5 is a schematic front view of a power station air cooling and guiding device according to another embodiment of the present disclosure;

fig. 6 is a cloud chart of temperature distribution obtained by CFD simulation software of the air cooling and guiding device for a power station according to an embodiment of the present application.

Reference numerals:

100. a fan platform; 110. a vent hole; 200. a bridge; 300. a deflector; 400. a first sub-deflector; 410. a first hem; 500. a second sub-deflector; 510. and a second flanging.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, are also within the scope of the present application based on the embodiments herein.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

For the heat exchanger shown in fig. 1, the temperature distribution cloud chart shown in fig. 2 is obtained through analysis of CFD (Computational Fluid Dynamics, computational fluid dynamics, abbreviated as CFD) simulation software, and the situation that the temperature is highest at the four corners of the lower part of the angle shape (the circle in fig. 2) and the local temperature rise occurs is known. Therefore, the application provides the power station air cooling flow guiding device capable of relieving the local temperature rise of the heat exchanger, and the specific scheme is as follows.

Fig. 3 is a schematic perspective view of a power station air cooling and guiding device according to an embodiment of the present application. Fig. 4 is a schematic front view of a power station air cooling and guiding device according to an embodiment of the present application. Fig. 5 is a schematic front view of a power station air cooling and guiding device according to another embodiment of the present application. Fig. 6 is a cloud chart of temperature distribution obtained by CFD simulation software of the air cooling and guiding device for a power station according to an embodiment of the present application.

The embodiment of the application provides a power station air cooling guiding device, as shown in fig. 3, including fan, crane span structure 200 and guide plate 300, wherein the fan provides the air current of heat exchange usefulness for whole device, and crane span structure 200 provides the basis of installation and support for guide plate 300, and guide plate 300 can carry out certain direction to the air current, changes the flow direction of air current.

The fan comprises a fan main body (not shown in the figure) and a fan platform 100, wherein the fan platform 100 is a structure for installing and supporting the fan main body and also supporting an angular (inverted V-shaped) bracket, the angular bracket is erected on the fan platform 100, and a heat exchange tube (not shown in the figure) is installed on the angular bracket again, so that the angular heat exchanger is formed.

The fan main part is installed in the below of fan platform 100, and fan platform 100 is equipped with ventilation hole 110, and ventilation hole 110 is the circular hole generally, and the air outlet of fan main part is relative with ventilation hole 110 for the air current that fan main part produced can reach fan platform 100's top through ventilation hole 110, carries out the heat transfer to the heat exchange tube.

As shown in fig. 3, the bridge 200 extends along the diameter direction of the vent hole 110, and both ends of the bridge 200 are disposed at the edges of the vent hole 110, that is, the bridge 200 spans the vent hole 110 and has a length substantially identical to that of the fan platform 100.

As shown in fig. 4, the deflector 300 extends along the length direction of the bridge 200, and the deflector 300 is flush with the bridge 200, that is, the deflector 300 is a long strip plate, so that the air flow blown directly below can be guided, and the guiding area is large. The lower end of the deflector 300 is disposed on the bridge 200, and the upper end of the deflector 300 is bent outwards, that is, towards the heat exchange tube at the outer side, so as to guide the airflow to disperse outwards and reach the heat exchange tube.

When the baffle 300 is provided, the height of the baffle 300 is preferably not more than one third of the height of the heat exchanger, that is, the air flow reaches the lower region of the heat exchanger substantially after being guided by the baffle 300, and exchanges heat with the lower portion of the heat exchanger.

When the fan is in operation, air flow generated by the fan main body is blown upwards, enters the upper part of the fan platform 100 from the vent hole 110, is positioned outside the bridge 200, is continuously and directly blown upwards to exchange heat with the heat exchanger, is blown to the lower surface of the bridge 200 and then dispersed to two sides, is further blown upwards to the guide plate 300, is dispersed outwards under the guide effect of the guide plate 300, is blown outwards, reaches the lower part of the heat exchanger, exchanges heat with the lower part of the heat exchanger, and relieves the local overheating condition of the heat exchanger.

Compared with the prior art, the air cooling flow guiding device for the power station can guide air flow through the flow guiding plate 300, so that the air flow is dispersed outwards under the action of the flow guiding plate 300, reaches the lower region of the heat exchanger, exchanges heat with the lower region of the heat exchanger, and obtains a temperature distribution cloud chart through CFD simulation software, and compared with fig. 2, the temperature of four corners of the angular heat exchanger is reduced to 323.7K in fig. 6 from 324.4K in fig. 2, the temperature of the lower portion of the heat exchanger is reduced, the local temperature rising condition of the four corners of the heat exchanger is relieved, and the heat exchanging effect of the heat exchanger is optimized.

In some embodiments, as shown in fig. 4, the baffle 300 includes a first sub-baffle 400 and a second sub-baffle 500, where the second sub-baffle 500 is located above the first sub-baffle 400, so that a certain degree of stratification of the airflow is achieved, and the airflow flows to different areas of the lower portion of the heat exchanger after being guided by the baffle 300.

During installation, the bridge 200 may be provided with a support plate, a support rib, and other components, so as to realize firm installation of the first sub-deflector 400 and the second sub-deflector 500.

In some embodiments, as shown in fig. 4, the cross section of the first sub-baffle 400 is a quarter of an ellipse, which may be understood as an arc of a quarter of an ellipse cut along the major and minor axes of the ellipse, and the cross section of the second sub-baffle 500 is a quarter of a circle, so that the surfaces of the first sub-baffle 400 and the second sub-baffle 500 are smooth and the air flow is smooth.

Specifically, in some embodiments, the major axis of the ellipse is twice the minor axis, and the diameter of the circle is equal to the minor axis of the ellipse.

In some embodiments, as shown in fig. 5, the upper end of the first sub-baffle 400 is provided with a first folded edge 410, the first folded edge 410 extends obliquely downwards, the air flow can flow obliquely downwards under the guiding action of the first folded edge 410, the air flow can more easily reach the lower part of the heat exchanger, exchange heat with the lower part of the heat exchanger, reduce the temperature of the lower part of the heat exchanger, release the effect of local temperature rise more remarkably, and the practical use effect is better.

Similarly, a second flange 510 is disposed at the upper end of the second sub-baffle 500, and the second flange 510 extends obliquely downward.

In some embodiments, the included angles between the first and

second flanges

410, 510 and the horizontal plane are all 5 to 15 degrees, that is, the first flange 410 is inclined downward by 5 to 15 degrees, so that the direction of the air flow from the first sub-baffle 400 to the first flange 410 is not changed much, and the air flow is more stable. The junction of the first fold 410 and the first sub-baffle 400 is a smooth connection to facilitate airflow therethrough. Similarly, the second flange 510 is also provided.

In some embodiments, as shown in fig. 4 and fig. 5, two first sub-deflectors 400 and two second sub-deflectors 500 are provided, where the two first sub-deflectors 400 are symmetrically disposed relative to the bridge 200, and the two second sub-deflectors 500 are symmetrically disposed relative to the bridge 200, so that the deflectors 300 correspond to the angular heat exchangers, and thus heat exchange can be performed on the lower portions of the heat exchange tubes on both sides, so that the local temperature rising condition of the heat exchange tubes on both sides is relieved, and the heat exchange effect is optimized.

In some embodiments, the first sub-baffle 400 and the second sub-baffle 500 are both made of glass fiber reinforced plastic or stainless steel, and the materials are easy to purchase and are not easy to rust.

In some embodiments, the first sub-baffle 400 and the second sub-baffle 500 are each 2mm to 5mm thick. The thickness in this range is greater than that in the case where the thickness is less than 2mm, and the structural strength of the first sub-baffle 400 is higher, so that it can withstand the impact of the air flow. Compared with the case that the thickness is larger than 5mm, the thickness in the range is smaller, the manufacturing materials are fewer, and the material cost is reduced.

Finally, it should be noted that the above embodiments are merely for illustrating the technical solution of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand; the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. The utility model provides a power station air cooling guiding device which characterized in that includes:

the fan comprises a fan main body and a fan platform, wherein the fan main body is arranged below the fan platform, the fan platform is provided with a vent hole, and an air outlet of the fan main body is opposite to the vent hole;

the bridge extends along the diameter direction of the vent hole, and two ends of the bridge are arranged at the edge of the vent hole;

the guide plate extends along the length direction of the bridge frame and is flush with the bridge frame, the lower end of the guide plate is arranged on the bridge frame, and the upper end of the guide plate is outwards bent to guide airflow to be outwards dispersed.

2. The power station air-cooled deflector of claim 1, wherein the deflector comprises a first sub-deflector and a second sub-deflector, the second sub-deflector being positioned above the first sub-deflector.

3. The power station air-cooled deflector of claim 2, wherein the first sub-deflector has a cross-section that is one-fourth of an ellipse and the second sub-deflector has a cross-section that is one-fourth of a circle.

4. A plant air cooling deflector according to claim 3, wherein the major axis of the ellipse is twice the minor axis, and the diameter of the circle is equal to the minor axis of the ellipse.

5. The air-cooled deflector for power stations as set forth in claim 4, wherein the upper end of the first sub-deflector is provided with a first flange extending obliquely downward, and the upper end of the second sub-deflector is provided with a second flange extending obliquely downward.

6. The power station air-cooled deflector of claim 5, wherein the first flange, the second flange, and the horizontal plane each have an included angle of 5 degrees to 15 degrees.

7. The power station air-cooling deflector according to any one of claims 2 to 6, wherein the first sub-deflector and the second sub-deflector are both two, the two first sub-deflectors are symmetrically disposed with respect to the bridge frame, and the two second sub-deflectors are symmetrically disposed with respect to the bridge frame.

8. The power station air-cooled deflector of claim 7, wherein the first and second sub-deflectors are each made of glass fiber reinforced plastic or stainless steel.

9. The power station air-cooled deflector of claim 8, wherein the first and second sub-deflectors each have a thickness of 2mm to 5mm.