CN111895802A - Diversion pressurization downward extension wind-break wall applied to direct air cooling platform - Google Patents
Diversion pressurization downward extension wind-break wall applied to direct air cooling platform Download PDFInfo
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- CN111895802A CN111895802A CN202010698116.2A CN202010698116A CN111895802A CN 111895802 A CN111895802 A CN 111895802A CN 202010698116 A CN202010698116 A CN 202010698116A CN 111895802 A CN111895802 A CN 111895802A
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- 238000001816 cooling Methods 0.000 title claims abstract description 78
- 230000005540 biological transmission Effects 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 230000003014 reinforcing effect Effects 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention relates to the technical field of air cooling platform cooling, in particular to a guide pressurization downward extension wind-break wall applied to a direct air cooling platform. The outer surfaces of the first support and the second support are respectively and movably provided with a plurality of guide vanes which are arranged in parallel, and the mounting ends of the guide vanes are perpendicular to the edges. The upper surface of each guide vane is planar, the lower surface of each guide vane is arc-shaped, the lower surface of the previous guide vane and the upper surface of the adjacent next guide vane form an air port, and the air port is enlarged from the free end to the mounting end of each guide vane. The guide vane driving device is used for rotating the guide vanes. The wind-break wall can reduce the influence of natural wind to unit air cooling platform, reinforcing air cooling platform heat transfer effect.
Description
Technical Field
The invention relates to the technical field of air cooling platform cooling, in particular to a diversion pressurization downward extension wind-break wall applied to a direct air cooling platform.
Background
The information disclosed in this background of the invention is only for enhancement of understanding of the general background of the invention and is not necessarily to be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
At present, air cooling is required to be adopted for newly built thermal power generating units in northern China, and the outstanding advantage of an air cooling platform is that compared with the traditional wet cooling unit, the water is saved by about 70%. The air-cooling condenser is a main auxiliary device of the air-cooling platform, the air-cooling condenser is used for establishing turbine vacuum, and the heat exchange efficiency of the air-cooling condenser is a key for determining unit vacuum. At present, in China, air-cooled condensers are mainly arranged on air-cooled platforms and are greatly influenced by natural wind, and for example, the wind direction, the wind speed, the wind temperature and the flow field distribution of the natural wind directly influence the heat exchange efficiency of the air-cooled condensers.
The inventor researches and discovers that for the air-cooling platform, the natural wind speed is far less than one third of the local sound velocity, so that the atmospheric motion around the air-cooling platform is considered to be incompressible steady flow, and the natural wind forms a flow field with scale and motion rule. But the flow field has great influence on the heat exchange efficiency of the air cooling platform. When the unit normally operates, the hot air flow on the upper part of the air cooling condenser is in a plume shape, when larger natural wind forms a flow field to move to the upper part of the radiator of the air cooling platform, the plume shape is damaged, and the hot air flow is pressed below the air cooling platform and deviates to the leeward side of the air cooling platform. Meanwhile, due to the suction effect of the fast flowing air below the air cooling platform, a negative pressure area is formed in a windward area below the air cooling platform, so that hot air can be sucked into the air cooling condenser again by the induced draft fan, a hot air backflow phenomenon occurs, the influence of the negative pressure area is increased along with the increase of natural wind speed, and the backflow amount of the hot air is increased; on the leeward side of the air cooling platform, hot air above the air cooling platform flows back to the lower part, and the hot air backflow phenomenon occurs. Due to the factors, the air suction volume of the air cooling fan is obviously reduced, the heat exchange efficiency and the vacuum degree of the air cooling condenser are reduced, the load of a unit is reduced by light persons, and the tripping of the steam turbine under the low-vacuum protection action can be caused by serious persons.
When the wind speed, wind temperature, wind direction and the like of natural wind are relatively fixed, the influence of the natural wind on an air cooling platform can be reduced, but once the wind speed is higher, the influence of the natural wind on an air cooling heat exchanger can be eliminated only in a smaller range.
Disclosure of Invention
Aiming at the problems, the key for improving the heat exchange efficiency of the air cooling platform is to reduce the harm caused by natural wind and utilize the advantage of the natural wind, so the invention provides the diversion and pressurization downward extending wind-blocking wall applied to the direct air cooling platform. Aiming at the influence of natural wind on the unit, a wind shield wall is additionally arranged below the air cooling platform, and an air inlet guide channel is formed by controlling arc guide vanes in the wind shield wall. When natural wind changes, the cross section of the flow guide channel changes by adjusting the opening of the arc-shaped flow guide blades, so that a gradual release channel (speed reduction) consistent with the air inlet direction of the natural wind is formed, and according to the pressure-flow velocity theorem (flow velocity is reduced and pressure is increased), the natural wind entering the lower part of the air cooling fan passes through the arc-shaped flow guide blades, the flow velocity is reduced, the pressure is increased, the influence of the natural wind on the air cooling platform of the unit can be reduced, and the heat exchange effect of the air cooling platform is enhanced. In order to achieve the above object, the technical solution of the present invention is as follows.
The utility model provides a be applied to water conservancy diversion pressure boost downwardly extending wind-break wall of direct air cooling platform, includes: the guide vane comprises a bracket, guide vanes and a guide vane driving device, wherein the bracket comprises a first bracket and a second bracket which are flat, and the edges of the first bracket and the second bracket are connected to form a bracket with a V-shaped structure. The outer surfaces of the first support and the second support are movably provided with a plurality of guide vanes which are arranged in parallel, and the mounting ends of the guide vanes are perpendicular to the edges, namely the guide vanes are in shutter type design. The upper surface of each guide vane is planar, the lower surface of each guide vane is arc-shaped, the lower surface of the previous guide vane and the upper surface of the adjacent next guide vane form an air port, and the air port is expanded from the free end to the mounting end of each guide vane under the condition that the adjacent guide vanes are parallel to each other. And the two groups of guide vane driving devices are respectively used for driving the guide vanes on the first support and the second support to rotate.
Furthermore, vertical separating frames are arranged in the first support and the second support, so that the guide vanes can be fixed better.
Furthermore, the guide vanes on the first support and the second support are composed of a plurality of rows of guide vanes, so that the natural wind change situation can be more flexibly coped with through the arrangement, and the guide of the natural wind is enhanced.
Further, guide vane drive arrangement includes horizontal rotating shaft, transmission connecting rod, driving motor and driving motor controller, wherein, horizontal rotating shaft is fixed guide vane's free end, the one end movable mounting of transmission connecting rod is on the support, the other end with horizontal rotating shaft connects, driving motor is connected with transmission connecting rod, driving motor controller is connected with driving motor.
Furthermore, both ends of the horizontal rotating shaft are fixed with transmission connecting rods.
Furthermore, the guide vane driving device can control the guide vane to rotate in a range of-9 degrees to +9 degrees.
Further, still include the air cooling platform, a be applied to water conservancy diversion pressure boost downwardly extending wind-break wall setting of direct air cooling platform is at the downwardly extending of air cooling platform, and from air cooling platform lower extreme downwardly extending.
Compared with the prior art, the invention has the following beneficial effects:
(1) the wind-shield wall is additionally arranged below the air cooling platform, so that a negative pressure area can be prevented from being formed or the range of the negative pressure area can be reduced, the hot air backflow stroke can be prolonged, the mixing of hot air and on-way cold air is intensified, the heat diffusion is accelerated, the air pressure at the inlet of the cooling fan is increased, and the inflow air quantity is increased.
(2) The shutter type guide vane forms a guide passage with adjustable opening, collects and changes the transverse natural wind passing through the air cooling platform, and can form cooling air flowing upwards along the wall surface of the air cooling platform, so that the air speed of the inlet of the cooling fan can be improved, the air quantity is increased, the heat exchange effect of the air cooling platform is enhanced, and the working efficiency of the air cooling fan is improved.
(3) Through the variable cross section drainage channel that uses guide vane to form, can be with the natural wind deceleration pressure boost that flows in drainage channel, the air current after the pressure boost not only can accelerate cooling air cooling fan export hot-air, prevents because hot-blast backward flow phenomenon that can not distribute the formation of hot-blast, can also utilize the advantage of self speed and direction, hinders the cross-wind vortex of environment, alleviates the phenomenon of flowing backward.
(4) Through installing the partition frame additional, make shutter type guide vane more firm, form more drainage channels, it is easier to control the circulation cross-section in the wind gap that drainage vane formed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
Fig. 1 is a schematic structural view of a diversion and pressurization downward wind-shielding wall applied to a direct air-cooling platform in the embodiment of the invention.
Fig. 2 is a schematic structural view of a guide vane and a guide vane driving device according to an embodiment of the present invention.
Fig. 3 is a schematic view of the diversion-pressurized lower retaining wall applied to the direct air-cooling platform in the embodiment of the invention.
The scores in the figure represent: 1-bracket, 2-guide vane, 3-guide vane driving device, 101-first bracket, 102-second bracket, 103-edge, 201-tuyere, 301-horizontal rotating shaft, 302-transmission connecting rod, 303-driving motor and 304-driving motor controller.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. Furthermore, it will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate that the directions of movement are consistent with those of the drawings, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element needs to have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Term interpretation section: the terms "mounted," "connected," "fixed," and the like in the present invention are to be understood in a broad sense, and for example, the terms "mounted," "connected," and "fixed" may be fixed, detachable, or integrated; the two components can be connected mechanically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the description are understood by those skilled in the art as having specific meanings according to the specific situation.
As described above, some existing wind-break walls can reduce the influence of natural wind on the air-cooling platform when the wind speed, wind temperature, wind direction and the like of the natural wind are relatively fixed, but once the speed of the natural wind is high, the influence of the natural wind on the air-cooling heat exchanger can be eliminated only in a small range. Therefore, the invention provides a diversion pressurization downward extending wind-break wall applied to a direct air cooling platform; the invention will now be further described with reference to the drawings and specific examples.
Referring to fig. 1-3, the diversion pressurized downward windshield wall applied to the direct air-cooling platform shown in the drawings mainly comprises: support 1, guide vane 2 and guide vane drive arrangement 3, wherein:
the bracket 1 is composed of a first bracket 101 and a second bracket 102 which are flat-plate-shaped, and edges 103 of the first bracket 101 and the second bracket 102 are connected to form the bracket 1 with a V-shaped structure. In this embodiment, the first support 101 and the second support 102 are both steel frames, so as to maintain sufficient strength and bearing capacity, and meet the use requirements under strong wind environment conditions.
Furthermore, the first support 101 and the second support 102 are both provided with vertical separating frames 104, that is, each support is divided into two vertical rows by the separating frames 104, and by additionally installing the separating frames, the louver type guide vanes are more stable, more guide channels are formed, and the flow cross section (air opening 201) formed by the guide vanes is easier to control.
The outer surfaces of the first support 101 and the second support 102 are both movably provided with a plurality of guide vanes 2 which are arranged in parallel through shafts, and the mounting ends of the guide vanes 2 are perpendicular to the edge 103, namely, the guide vanes 2 are in a shutter type design. The guide vanes 2 on each bracket are divided into four rows. The upper surface of each guide vane 2 is planar, the lower surface of each guide vane is arc-shaped, the lower surface of the previous guide vane 2 and the upper surface of the adjacent next guide vane form an air port 201, and under the condition that the adjacent guide vanes are parallel to each other, the air port 201 is enlarged from the free end to the mounting end of each guide vane 2. The two sets of guide vane driving devices 3 are respectively used for driving the guide vanes 2 on the first support 101 and the second support 102. Along with the adjustment of the opening degree of the arc-shaped guide vane 2, the natural wind speed changes faster and stronger, so that the destructive action of the vortex around the wind-break wall on the air suction and heat exchange of the draught fan can be greatly reduced, the problem of downward backflow of hot air after heat exchange is reduced, and the hot air backflow phenomenon is reduced.
Further, the guide vane driving device 3 includes a horizontal rotating shaft 301, a transmission connecting rod 302, a driving motor 303 and a driving motor controller 304, wherein the horizontal rotating shaft 301 is fixed at the free end of the guide vane 2, one end of the transmission connecting rod 302 is movably mounted on the bracket 1, the other end is connected with the horizontal rotating shaft 301, and the transmission connecting rod 302 is fixed at both ends of the horizontal rotating shaft 301. The driving motor 303 is connected with the transmission connecting rod 302, the driving motor controller 304 is connected with the driving motor 303, and the guide vane driving device 3 can control the guide vane 2 to rotate within a range of-90 degrees to +90 degrees. When the driving motor 303 sequentially drives the transmission connecting rod 302 to rotate and the horizontal rotating shaft 301 to rotate, the guide vanes 2 are also driven to rotate, and when the guide vanes 2 are completely closed, a closed lower wind-blocking wall can be formed; when the guide vane 2 is opened, a gradually-releasing air port 201 can be formed to guide the natural wind to circulate; the opening degree of the arc wind-shielding blade is adjusted by the driving device according to the actual operation condition of the air cooling platform.
As shown in fig. 3, the arc-shaped guide vanes 2 used in the invention have stronger guide effect on natural wind, and under the control action of the guide vane driving device 3, the guide vanes 2 can form gradually-released type wind ports 201 to reduce the speed and pressurize the natural wind which is about to enter a wind-blocking wall under an air-cooling platform, so that the air intake of an air-cooling fan can be increased, and the heat exchange effect of an air-cooling radiator is increased; the cold air which is about to leave the wind-blocking wall under the air-cooling platform can be pressurized at a reduced speed, the capacity of the air after pressure rise for resisting the disturbance of the turbulent flow is enhanced, and the hot air above the air-cooling platform can be driven to leave the air-cooling platform more quickly.
Finally, it should be understood that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (7)
1. The utility model provides a be applied to water conservancy diversion pressure boost downwardly extending wind-break wall of direct air cooling platform which characterized in that includes:
the bracket comprises a first bracket and a second bracket which are flat-plate-shaped, and the edges of the first bracket and the second bracket are connected to form a bracket with a V-shaped structure;
the outer surfaces of the first bracket and the second bracket are respectively movably provided with a plurality of guide vanes which are arranged in parallel, and the mounting ends of the guide vanes are vertical to the edges;
the upper surface of each guide vane is planar, the lower surface of each guide vane is arc-shaped, the lower surface of the previous guide vane and the upper surface of the adjacent next guide vane form an air port, and the air port is expanded from the free end to the mounting end of each guide vane under the condition that the adjacent guide vanes are parallel to each other;
and the two groups of guide vane driving devices are respectively used for driving the guide vanes on the first support and the second support to rotate.
2. The diversion and pressurization downward wind-break wall applied to the direct air-cooling platform as claimed in claim 1, wherein vertical separation frames are arranged in the first support and the second support.
3. The diversion and pressurization downward wind-break wall applied to the direct air-cooling platform as claimed in claim 1, wherein the respective diversion blades on the first bracket and the second bracket are composed of a plurality of rows of diversion blades.
4. The diversion and pressurization downward extending wind-break wall applied to the direct air-cooling platform as claimed in claim 1, wherein the diversion blade driving device comprises a horizontal rotating shaft, a transmission connecting rod, a driving motor and a driving motor controller, wherein the horizontal rotating shaft is fixed at the free end of the diversion blade, one end of the transmission connecting rod is movably mounted on the bracket, the other end of the transmission connecting rod is connected with the horizontal rotating shaft, the driving motor is connected with the transmission connecting rod, and the driving motor controller is connected with the driving motor.
5. The diversion and pressurization downward wind-break wall applied to the direct air-cooling platform as claimed in claim 4, wherein the two ends of the horizontal rotating shaft are fixed with transmission connecting rods.
6. The guide-pressurization lower wind-break wall applied to the direct air-cooling platform of claim 1, wherein the guide vane driving device can control the guide vanes to rotate within a range of-9 degrees to +9 degrees.
7. The diversion and pressurization downward extending wind-blocking wall for the direct air-cooling platform as claimed in any one of claims 1 to 6, further comprising an air-cooling platform, wherein the diversion and pressurization downward extending wind-blocking wall for the direct air-cooling platform is arranged below the air-cooling platform and extends downward from the lower end of the air-cooling platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010698116.2A CN111895802A (en) | 2020-07-20 | 2020-07-20 | Diversion pressurization downward extension wind-break wall applied to direct air cooling platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010698116.2A CN111895802A (en) | 2020-07-20 | 2020-07-20 | Diversion pressurization downward extension wind-break wall applied to direct air cooling platform |
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| CN111895802A true CN111895802A (en) | 2020-11-06 |
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| CN202010698116.2A Pending CN111895802A (en) | 2020-07-20 | 2020-07-20 | Diversion pressurization downward extension wind-break wall applied to direct air cooling platform |
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Citations (7)
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|---|---|---|---|---|
| JP2007107814A (en) * | 2005-10-13 | 2007-04-26 | Toshiba Corp | Air-cooled condenser |
| CN200955911Y (en) * | 2006-05-26 | 2007-10-03 | 江苏双良空调设备股份有限公司 | Power station direct air-cooled condenser with air guide device |
| CN102155850A (en) * | 2011-05-06 | 2011-08-17 | 哈尔滨工业大学（威海） | Direct air cooling island windbreak deflecting device for power station |
| CN202734593U (en) * | 2012-08-08 | 2013-02-13 | 辽宁科林环保工程有限责任公司 | Crosswind-resisting guiding device of direct cooling type air cooling system |
| CN103148709A (en) * | 2013-03-20 | 2013-06-12 | 北京奇点时空科技发展有限公司 | Windproof device of direct air-cooling system, windproof control system and windproof control method |
| CN103629944A (en) * | 2013-12-04 | 2014-03-12 | 华北电力大学（保定） | Intake air cooling diffusion diversion device for direct air-cooled condenser |
| CN203657538U (en) * | 2014-01-14 | 2014-06-18 | 内蒙古岱海发电有限责任公司 | Air cooling island comprising louver type wind walls |
-
2020
- 2020-07-20 CN CN202010698116.2A patent/CN111895802A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007107814A (en) * | 2005-10-13 | 2007-04-26 | Toshiba Corp | Air-cooled condenser |
| CN200955911Y (en) * | 2006-05-26 | 2007-10-03 | 江苏双良空调设备股份有限公司 | Power station direct air-cooled condenser with air guide device |
| CN102155850A (en) * | 2011-05-06 | 2011-08-17 | 哈尔滨工业大学（威海） | Direct air cooling island windbreak deflecting device for power station |
| CN202734593U (en) * | 2012-08-08 | 2013-02-13 | 辽宁科林环保工程有限责任公司 | Crosswind-resisting guiding device of direct cooling type air cooling system |
| CN103148709A (en) * | 2013-03-20 | 2013-06-12 | 北京奇点时空科技发展有限公司 | Windproof device of direct air-cooling system, windproof control system and windproof control method |
| CN103629944A (en) * | 2013-12-04 | 2014-03-12 | 华北电力大学（保定） | Intake air cooling diffusion diversion device for direct air-cooled condenser |
| CN203657538U (en) * | 2014-01-14 | 2014-06-18 | 内蒙古岱海发电有限责任公司 | Air cooling island comprising louver type wind walls |
Non-Patent Citations (1)
| Title |
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| 张耀祖: "直接空冷凝汽器加装扩压导流叶栅的性能分析", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
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