CN102809305B - Steam distribution device for direct air-cooled condenser for power station - Google Patents
Steam distribution device for direct air-cooled condenser for power station Download PDFInfo
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- CN102809305B CN102809305B CN201210298261.7A CN201210298261A CN102809305B CN 102809305 B CN102809305 B CN 102809305B CN 201210298261 A CN201210298261 A CN 201210298261A CN 102809305 B CN102809305 B CN 102809305B
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- steam
- steam distribution
- guiding gutter
- distributing pipe
- bobbin carriage
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Abstract
The invention relates to a steam distribution device for a direct air-cooled condenser of a power station. The steam distribution device comprises steam distribution pipes, steam distribution pipe boxes and fin-type heat exchange pipe bundles, wherein the steam distribution pipes are communicated with the fin-type heat exchange pipe bundles through the steam distribution pipe boxes; flow guide grooves are formed in the steam distribution pipes, are located at the front ends of the steam distribution pipe boxes and are communicated with the steam distribution pipe boxes; the flow guide grooves are inclined grooves below the steam distribution pipes and welded together with the steam distribution pipes; the ports at the rear parts of the flow guide grooves are welded and communicated with the front end parts of the steam distribution pipe boxes; and of the flow guide grooves, the slope is 5-8 degrees, the length is 3-5 mm and the width is the same as that of the steam distribution pipe boxes. The steam distribution device has the advantages that the structure is simple, the steam can transit to the fin-type heat exchange pipe bundles smoothly and uniformly, the generation of vortex flow is avoided, the heat exchange characteristic of the air-cooled condenser is improved, the service life of the fin-type heat exchange pipe bundles is prolonged, and both the safety and the economical efficiency of the air-cooled unit in running are improved.
Description
Technical field
The invention belongs to energy source and power field, particularly a kind of power station direct air-cooling condenser vapor distribution device, is applicable to Direct Air-Cooled heat power station.
Background technology
The energy skewness problem of the regional rich coal lack of water of China " three Norths ", has promoted the development of air cooling technique.Direct Air-Cooling Technology is to utilize air as cooling medium, to the steam after steam turbine acting, carries out cooling.In Air-Cooling Island, the flow process of steam is: after steam is discharged by turbine low pressure cylinder, by main steam line, rise to certain altitude, in distributing female pipe, lateral flow enters dispensing branch, finally in steam distribution pipeline, by steam distribution bobbin carriage, is assigned to each air cooling tubes condenser.But in the middle of actual motion, because the complexity of blow-off line structure in air cooling system and pressure loss situation can cause the phenomenon of steam flow skewness, not only cause the fluctuation of turbine back pressure, and it is more difficult that rotation speed of fan is regulated, so pipeline steam skewness is one of research air cooling technique problem demanding prompt solution on the impact of Direct Air-cooled Unit.
There are some researches show, because distribution of steam inequality can cause many problems, such as air cooling tubes condenser preventing freeze in winter and stable problem, blower fan exert oneself size with the unmatched problem of each unit steam flow, it is too high that the design of blow-off line affects steam pressure loss, the problem that causes whole Air-Cooling Island performance driving economy to decline.The solution of existing air cooling system normally arranges deflector or changes distribution duct diameter and outlet size in blow-off line, to improve distribution of steam inequality.As disclosed in the Chinese patent that the patent No. is 200920033940.5 " a kind of flow guide device of air cooling exhausting pipeline ", it comprises shell, guide vane, supporting rod, 90 ° of bend parts at air cooling blow-off line are provided with guiding device, in the oval-shaped shell of guiding device, be provided with supporting rod, on supporting rod, be provided with guide vane, guide vane adopts unequal-interval to arrange.But these measures all cannot avoid steam in the vortex phenomenon of flowing through and connecting steam-distributing pipe and occurring during with the steam distribution bobbin carriage of condenser fin type heat exchange tube bank.
Summary of the invention
Technical problem to be solved by this invention is the deficiency of the steam eddy current that causes of the existence in order to overcome in prior art due to steam distribution bobbin carriage to direct air cooled condenser heat exchange adverse effect, provide a kind of simple in structure, make steam be transitioned into steadily, equably fin type heat exchange tube bank, avoid the generation of eddy current, improve the operation characteristic of air cooling system, the power station direct air-cooling condenser vapor distribution device that reliability is high.
The technical scheme that the present invention solves the problems of the technologies described above employing is, a kind of power station direct air-cooling condenser vapor distribution device, comprise steam-distributing pipe, steam distribution bobbin carriage, fin type heat exchange tube bank, described steam-distributing pipe is communicated with fin type heat exchange tube bank by steam distribution bobbin carriage, it is characterized in that: described steam-distributing pipe is provided with guiding gutter, guiding gutter is positioned at steam distribution bobbin carriage front end, and is communicated with steam distribution bobbin carriage.
The groove of described guiding gutter for being obliquely installed along steam-distributing pipe below, itself and steam-distributing pipe are integrally welded, and its back port is communicated with the welding of steam distribution bobbin carriage leading section, and described guiding gutter gradient is 5 ° ~ 8 °, length is 3m ~ 5m, and width is identical with steam distribution bobbin carriage width.
Described guiding gutter is divided into two parts, and front portion longitudinal section is triangle, and rear portion longitudinal section is pentagon, and two parts are integral by welding processing.
The present invention tilts guiding gutter is set at steam-distributing pipe, guiding gutter is positioned at steam distribution bobbin carriage front end, guiding gutter can play guide functions to the steam in horizontal steam-distributing pipe, make steam enter in advance steady flow condition, thereby reduce the eddy current that the vertical linking due to steam distribution bobbin carriage causes, be conducive to steam and enter steadily, equably each finned tube, fin type heat exchange tube bank is heated evenly, carry out uniform cooling heat transferring.Against existing technologies, the present invention is simple in structure, make steam steady, be transitioned into equably fin type heat exchange tube bank, reduce the impact that the vertical linking of steam distribution bobbin carriage brings, avoided the phenomenon of the steam distribution inequality that the existence due to steam-distributing pipe bottom steam distribution bobbin carriage causes, especially the more serious admission assignment of traffic uneven phenomenon existing at steam-distributing pipe reducing place, mild steam flowing in steam-distributing pipe, make steam be transitioned into more equably rib heat exchanging pipe beam entrance place, the uniformity that simultaneously guarantees each finned tube inside admission flow is distributed, and then improved the heat transfer characteristic of air cooling tubes condenser, extended the service life of fin type heat exchange tube bank, security and the economy of Air-cooled Unit operation have been improved.
Accompanying drawing explanation
Fig. 1 is composition structural representation of the present invention.
Fig. 2 is that the A-A of Fig. 1 is to schematic diagram.
Fig. 3 is that the B-B of Fig. 1 is to schematic diagram.
Fig. 4 is that steam-distributing pipe of the present invention is restrained porch pipeline section motion pattern after reducing for the first time.
Label in figure is: 1. steam-distributing pipe, 2. steam distribution bobbin carriage, 3. fin type heat exchange tube bank, 4. guiding gutter.
The specific embodiment
As can be seen from Figure 1, a kind of power station direct air-cooling condenser vapor distribution device, comprises steam-distributing pipe 1, steam distribution bobbin carriage 2, fin type heat exchange tube bank 3 etc.Described steam-distributing pipe 1 is communicated with fin type heat exchange tube bank 3 by steam distribution bobbin carriage 2, specifically steam-distributing pipe 1 bottom and fin type heat exchange are restrained 3 tops and are weldingly connected by steam distribution bobbin carriage 2, and described steam distribution bobbin carriage 2 has played the effect that connects steam-distributing pipe and fin type heat exchange tube bank.Steam in steam-distributing pipe 1 enters fin type heat exchange tube bank 2 by the linking of steam distribution bobbin carriage 2, carries out cooling heat transferring.
Feature of the present invention is: described steam-distributing pipe 1 is provided with guiding gutter 4, and guiding gutter 4 is positioned at steam distribution bobbin carriage 2 front ends, and is communicated with steam distribution bobbin carriage 2.
The groove of described guiding gutter 4 for being obliquely installed along steam-distributing pipe 1 below, itself and steam-distributing pipe 1 are integrally welded.Guiding gutter 4 is downward-sloping gradually from steam-distributing pipe 1 below, is finally connected with steam distribution bobbin carriage 2.That is to say that guiding gutter 4 its back port are communicated with the 2 leading section welding of steam distribution bobbin carriage.Described guiding gutter 4 gradients are 5 ° ~ 8 °, and length is 3m ~ 5m, and width is identical with steam distribution bobbin carriage width.
The material of described guiding gutter 4 is identical with steam-distributing pipe 1, and wall thickness is also identical with steam-distributing pipe 1, guarantees the stability of vapor flow in pipeline.Guiding gutter 4 is made for carbon steel, adopts the method for welding processing to be connected with steam-distributing pipe 1 and steam distribution bobbin carriage 2, and commissure should keep compactness.
Described guiding gutter 4 is divided into two parts, and front portion longitudinal section is triangle, as shown in Figure 3.Rear portion longitudinal section is pentagon, as shown in Figure 2.Two parts are integral by welding processing.
Fig. 4 is that the present invention adds after guiding gutter 4, and steam-distributing pipe 1 is finned heat-exchanging tube bundle 3 porch pipeline section motion patterns after reducing for the first time.As shown in Figure 4, add guiding gutter 4, steam flows steadily after the effect of guiding gutter 4, steam rigidly connects and contacts fin type heat exchange and restrain and just enter in finned tube in a large number for 3 o'clock, does not occur backflow phenomenon, and this explanation guiding gutter 4 has played the effect that makes steam smooth flow, be conducive to steam and enter steadily, uniformly each finned tube, fin type heat exchange tube bank 3 is heated evenly, has improved the heat transfer characteristic of air cooling tubes condenser, improved security and the economy of Air-cooled Unit operation.Visible, steam tends towards stability in advance mobile in guiding gutter 4, just can not cause the consequence of bringing due to the 2 moments sinking of steam distribution bobbin carriage when steam contacts with fin type heat exchange tube bank 3 like this.
The present invention is simple in structure, make steam steady, be transitioned into equably fin type heat exchange tube bank, reduce the impact that the vertical linking of steam distribution bobbin carriage brings, avoided the phenomenon of the steam distribution inequality that the existence due to steam-distributing pipe bottom steam distribution bobbin carriage causes, especially the more serious admission assignment of traffic uneven phenomenon existing at steam-distributing pipe reducing place, mild steam flowing in steam-distributing pipe, make steam be transitioned into more equably rib heat exchanging pipe beam entrance place, the uniformity that simultaneously guarantees each finned tube inside admission flow is distributed, and then improved the heat transfer characteristic of air cooling tubes condenser, extended the service life of fin type heat exchange tube bank, security and the economy of Air-cooled Unit operation have been improved.
Claims (2)
1. a power station direct air-cooling condenser vapor distribution device, comprise steam-distributing pipe, steam distribution bobbin carriage, fin type heat exchange tube bank, described steam-distributing pipe is communicated with fin type heat exchange tube bank by steam distribution bobbin carriage, it is characterized in that: described steam-distributing pipe is provided with guiding gutter, the groove of described guiding gutter for being obliquely installed along steam-distributing pipe below, itself and steam-distributing pipe are integrally welded, and the groove shape opening on guiding gutter top communicates completely with the bottom of steam-distributing pipe; Guiding gutter is positioned at steam distribution bobbin carriage front end, and is communicated with steam distribution bobbin carriage; Described guiding gutter is downward-sloping gradually from steam-distributing pipe below, is finally connected with steam distribution bobbin carriage; Guiding gutter back port is communicated with the welding of steam distribution bobbin carriage leading section, and described guiding gutter gradient is 5 ° ~ 8 °, and length is 3m ~ 5m, and width is identical with steam distribution bobbin carriage width.
2. power station direct air-cooling condenser vapor distribution device according to claim 1, is characterized in that: described guiding gutter is divided into two parts, and front portion longitudinal section is triangle, and rear portion longitudinal section is pentagon, and two parts are integral by welding processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210298261.7A CN102809305B (en) | 2012-08-21 | 2012-08-21 | Steam distribution device for direct air-cooled condenser for power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210298261.7A CN102809305B (en) | 2012-08-21 | 2012-08-21 | Steam distribution device for direct air-cooled condenser for power station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102809305A CN102809305A (en) | 2012-12-05 |
| CN102809305B true CN102809305B (en) | 2014-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210298261.7A Expired - Fee Related CN102809305B (en) | 2012-08-21 | 2012-08-21 | Steam distribution device for direct air-cooled condenser for power station |
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| CN (1) | CN102809305B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107704674B (en) * | 2017-09-26 | 2020-12-08 | 吉林省电力科学研究院有限公司 | Numerical simulation method for condensation process of water vapor of air-cooled condenser |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10330659B3 (en) * | 2003-07-08 | 2004-12-23 | Gea Energietechnik Gmbh | Steam drainage line for steam turbine power generation plant, with branch lines leading to air-cooled condensation elements tapped off from upwards inclined main steam drainage line |
| CN2914006Y (en) * | 2005-12-26 | 2007-06-20 | 关晓春 | Direct air cooling vapour condenser reverse half U-shaped steam dispenser for power station |
| CN101476823A (en) * | 2009-01-19 | 2009-07-08 | 北京交通大学 | Internal steam conduction apparatus of direct air cooling branch-shaped exhaustion duct system |
| CN201628489U (en) * | 2010-04-09 | 2010-11-10 | 首航艾启威冷却技术(北京)有限公司 | Steam exhausting pipeline of obliquely-ascending main pipe of direct air cooling system of power station |
| CN201885596U (en) * | 2010-10-28 | 2011-06-29 | 华电重工装备有限公司 | Air-cooled condenser |
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