CN104533545A - Novel air cooling system - Google Patents
Novel air cooling system Download PDFInfo
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- CN104533545A CN104533545A CN201410834100.4A CN201410834100A CN104533545A CN 104533545 A CN104533545 A CN 104533545A CN 201410834100 A CN201410834100 A CN 201410834100A CN 104533545 A CN104533545 A CN 104533545A
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- air cooling
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Abstract
The invention discloses a novel air cooling system which comprises a turbine, an air cooling tower and a condensation tank. An air cooling condenser is arranged under the air cooling tower, and exhaust steam of the turbine passes through a steam exhaust pipeline into the air cooling condenser and performs heat transfer with cooling air directly. The air cooling condenser is communicated with the condensation tank through a lower water header, and cooling condensed condensated water is collected into the condensation tank through the lower water header. A condensation pump is arranged at the outlet of the condensation tank. Pressure boost is performed on the condensated water through the condensation pump, and the condensated water is sent to a sealing heater and flows into a heat regenerative system. The novel air cooling system has the advantages of a direct air cooling system and a surface condensation type indirect cooling system, and abandons the defects of the direct air cooling system and the surface condensation type indirect cooling system effectively. The novel air cooling system has the advantages that the power consumption is nearly zero, the heat exchange efficiency is high, the annual operation vacuum is high, and the ability of environment resistance is strong. The problems that a current air cooling machine unit needs to face are solved effectively, and the economy in the machine unit operation is increased. The novel air cooling system can be applied to the aspects such as heat energy power engineering, a thermal power plant, and the aspect that the safety, economy and energy saving and cost reducing of the air cooling machine unit are improved.
Description
Technical field
The invention belongs to thermal energy exchange and aerodynamic force field, relate to power station cold end system, be specifically related to a kind of novel air cooling system.
Background technique
Prospect of Utility Air Cooling is as the effective water-saving thermal power generating technology of current one, and in the power industry in the deficienter area of water resources, extensive use is trend of the times.Look forward to the future, Electric Factory Air-Cooling technical prospect is still had an optimistic view of, and it can not only be applied to water-deficient area, even if the area abundant at water source, from reducing water resources consumption, promoting the angle of sustainable utilization of water resource also to have very high actual application value.
The current air cooling system for power station mainly contains three kinds, i.e. direct air cooling system, the band indirect air cooling system (Hai Leshi) of direct-contact type condenser and the indirect air cooling system (Harmon formula) of belt surface formula vapour condenser.
At home, at most, being secondly cooling system between table solidifying formula, is finally cooling system between mixed condensation type in direct air cooling system application.More than 98% of the above two duty cold kludge capacity.The operating experience of recent decades shows, air cooling system conservation benefits is quite obvious, but its inferior position is also quite outstanding: 1) Direct Air-Cooling Technology aspect, there is the problems such as station service is high, the low unit output deficiency of summer high temperature period operation vacuum, sensitivity affected by environment; 2), there is the inferior positions such as station service is high, twice heat exchange heat exchange efficiency is low in cooling system aspect between table solidifying formula.
Direct air cooled system cooling system of unifying between table solidifying formula carries out Integrated comparative in water-saving result, station service, environmental sensitivity, heat exchange efficiency, year performance driving economy etc., specific as follows:
1) water-saving result: both are suitable.
2) power consumption aspect: direct air cooling system adopts axial flow frequency conversion fan, although realize carrying out frequency adjustment according to unit load, entering air temp, power consumption is still comparatively large, descends consumption rate to be about 1% at full capacity; Between table solidifying formula, cooling system recirculated cooling water is supplied by two or three circulating water pump, although realize circulating water pump optimizing operation according to unit load, ambient temperature, power consumption is still comparatively large, substantially suitable with direct air cooling.
3) environmental sensitivity: the impact of direct air cooling system on ambient wind is more responsive, unit operation economy amplitude is larger; Between table solidifying formula, cooling system is on slower on the impact of ambient wind, and unit operation economy amplitude is relatively little.
4) heat exchange efficiency: in direct air cooling system, exhaust steam and cooling-air belong to a heat exchange, and heat exchange efficiency is higher, therefore heat diffusion area is less; Between table solidifying formula, in cooling system, recirculated cooling water belongs to heat carrier, and by exhaust steam transfer of heat to cooling-air, heat exchange efficiency is lower, therefore heat diffusion area is larger.
5) year performance driving economy: cooling system unit year running back pressure between table solidifying formula will lower than direct air cooling system unit.
In summary, direct air cooled system its water-saving result of cooling system between table solidifying formula of unifying is obvious, but power consumption is also obvious.In addition, direct air cooling system heat exchange efficiency is high, and between table solidifying formula cooling system environmental sensitivity poor, year performance driving economy higher.Reduce discharging at national energy-saving, under the fundamental policy of building a conservation-minded society, how to make the advantage of above-mentioned two kinds of air cooling forms effectively combine, and abandon its inferior position, the advantage promoting Air cooling technique is more aobvious important.
Summary of the invention
The object of the invention is to solve the problem, propose a kind of novel air cooling system, this system has been taken into account direct air cooled system and have been unified the advantage of cooling system between table solidifying formula, and has effectively abandoned respective shortcoming.The present invention has power consumption hardly, heat exchange efficiency is high, year operation vacuum is high, resist the advantages such as environment capacity is stronger, effectively solves the problem faced by current Air-cooled Unit, improves unit operation Economy.The present invention can be applicable to Thermal power engneering, thermal power plant, Air-cooled Unit improve Security, Economy and the aspect such as energy-saving and cost-reducing.
To achieve these goals, the technical solution adopted in the present invention is:
A novel air cooling system, comprises steam turbine, air cooling tower and condensate water tank; The lower periphery of air cooling tower has been arranged vertically air cooling condenser, and turbine discharge is introduced in air cooling condenser through blow-off line and carried out direct heat transfer with cooling-air; Air cooling condenser is connected with condensate water tank by lower water manifold, and condensed water of condensation is collected in condensate water tank through lower water manifold; The outlet port of condensate water tank is provided with condensate pump, and water of condensation enters heat regenerative system send into gland heater after condensate pump boosting after.
Described air cooling tower is natural draft cooling tower, is arranged at factory building outside, and its cooling-air is produced by natural draft cooling tower nature suction force.
Cooling tube bundle in described air cooling condenser is steel pipe aluminum fin-stock, hot galvanizing.
Described air cooling condenser is several cooling units be evenly arranged along air cooling tower circumferencial direction, and the outlet of the water of condensation of these cooling units is all connected with condensate water tank by lower water manifold.
The end of described blow-off line arranges the steam-distributing pipe be connected with some cooling unit suction ports, and the turbine discharge in blow-off line is dispensed to each cooling unit, and is cooled by the cooling-air flowing through air cooling condenser.
Described steam-distributing pipe comprises the annular steam be connected with blow-off line and distributes female pipe, and the relevant position, inner side that annular steam distributes female pipe offers for turbine discharge being distributed the arm importing corresponding cooling unit.
Described air cooling condenser is also provided with the pumped vacuum systems for extracting incondensable gas in air cooling condenser.
Described pumped vacuum systems comprises vacuum lead and water ring vaccum pump, and one end of vacuum lead is connected with air cooling condenser, and the other end is connected on water ring vaccum pump.
Each cooling unit of described air cooling condenser all comprises for the following current part of the water of condensation that leads with for coordinating the reflux fraction taken away by incondensable gas with pumped vacuum systems, and vacuum lead is connected with the reflux fraction on each cooling unit.
Compared with prior art, the present invention has following beneficial effect:
The present invention and traditional Air-cooled Unit (no matter being Direct Air-cooled Unit or indirect air cooling unit) unlike, both without the variable-frequency type axial-flow blower of some, also countless circulating water pump; Cold end system, without current consuming apparatus, therefore effectively saves station service; The equipment such as condensate water tank and condensate pump is arranged on air cooling tower adjacent bottom portions, therefore requires higher to the anti-cavitation performance of condensate pump; Due to air cooling tower distance main frame factory building certain distance, therefore the subsidiary engines such as vacuum pump can be arranged near tower.Air cooling condenser belongs to a heat exchange, and the coefficient of heat transfer is higher; Environmental sensitivity is poor, and whole year operation back pressure is lower.The present invention, both without a large amount of axial-flow blower of direct air cooling system, again without several circulating water pump of cooling system between table solidifying formula, effectively saves station service, promotes the operation performance driving economy of air cooling turbo-generator on the whole.
Accompanying drawing explanation
Fig. 1 is schematic flow sheet of the present invention;
Fig. 2 is the schematic diagram of steam-distributing system of the present invention.
Wherein, 1 is steam turbine; 2 is steam exhaust device; 3 is blow-off line and steam-distributing pipe; 4 is natural draft cooling tower; 5 is air cooling condenser; 6 is lower water manifold; 7 is vacuum lead; 8 is water ring vaccum pump; 9 is condensate water tank; 10 is condensate pump; 11 is gland heater; 12 manage for annular steam distributes mother; 13 is arm.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described in detail:
See Fig. 1 and Fig. 2, turbine discharge of the present invention is introduced through blow-off line and steam-distributing pipe and is arranged in the air cooling condenser of natural draft cooling tower lower periphery, direct heat transfer is carried out with cooling-air, condensed water of condensation is collected in condensate water tank through lower water manifold, enters heat regenerative system afterwards via after condensate pump boosting.Air cooling tower is natural draft cooling tower, and natural draft cooling tower is arranged on the outside certain position of factory building, and cooling-air is produced by air cooling tower nature suction force, and air cooling condenser is arranged vertically on air cooling tower lower periphery.Air cooling condenser is evenly divided into several cooling units along air cooling tower circumferencial direction.Fig. 2 is shown in by steam-distributing system schematic diagram (plan view).Steam distributes importing cooling unit by steam-distributing pipe, is cooled by the cooling-air flowing through air cooling condenser, and condensed water of condensation imports lower water manifold.The each cooling unit of air cooling condenser is provided with following current part and reflux fraction.Cooling tube bundle is steel pipe aluminum fin-stock, hot galvanizing.The present invention is also provided with pumped vacuum systems, to extract the incondensable gas in air cooling condenser.In addition, condensate water tank of the present invention is arranged on air cooling tower air cooling condenser bottom, and condensate pump is arranged in the bottom near condensate water tank, enters the heat regenerative system of factory building after water of condensation boosting through condensing water conduit.
Effect:
The maximum feature of this technology is the air cooling blower fan both having eliminated direct air cooling system, eliminates again the circulating water pump of cooling system between table solidifying formula, saves station service, station service declines about 1%, for 600MW Air-cooled Unit, net coal consumption rate declines about 4g/ (kWh), and Economy is obvious.In addition, coa consumption rate declines, and to mean under same load that the pollutant discharge amounts such as nitrogen oxide decline, obvious environment benefit.
Above content is only and technological thought of the present invention is described; protection scope of the present invention can not be limited with this; every technological thought proposed according to the present invention, any change that technological scheme basis is done, within the protection domain all falling into claims of the present invention.
Claims (9)
1. a novel air cooling system, is characterized in that: comprise steam turbine (1), air cooling tower (4) and condensate water tank (9); The lower periphery of air cooling tower (4) has been arranged vertically air cooling condenser (5), and turbine discharge is introduced in air cooling condenser (5) through blow-off line (3) and carried out direct heat transfer with cooling-air; Air cooling condenser (5) is connected with condensate water tank (9) by lower water manifold (6), and condensed water of condensation is collected in condensate water tank (9) through lower water manifold (6); The outlet port of condensate water tank (9) is provided with condensate pump (10), and water of condensation enters heat regenerative system send into gland heater (11) after condensate pump (10) boosting after.
2. novel air cooling system according to claim 1, is characterized in that: described air cooling tower (4) is natural draft cooling tower, is arranged at factory building outside, and its cooling-air is produced by natural draft cooling tower nature suction force.
3. novel air cooling system according to claim 1, is characterized in that: the cooling tube bundle in described air cooling condenser (5) is steel pipe aluminum fin-stock, hot galvanizing.
4. novel air cooling system according to claim 1, it is characterized in that: described air cooling condenser (5) is several cooling units be evenly arranged along air cooling tower (4) circumferencial direction, and the outlet of the water of condensation of these cooling units is all connected with condensate water tank (9) by lower water manifold (6).
5. novel air cooling system according to claim 4, it is characterized in that: the end of described blow-off line (3) arranges the steam-distributing pipe be connected with some cooling unit suction ports, turbine discharge in blow-off line (3) is dispensed to each cooling unit, and is cooled by the cooling-air flowing through air cooling condenser (5).
6. novel air cooling system according to claim 5, it is characterized in that: described steam-distributing pipe comprises the annular steam be connected with blow-off line (3) and distributes female pipe (12), the relevant position, inner side that annular steam distributes female pipe offers for turbine discharge being distributed the arm (13) importing corresponding cooling unit.
7. novel air cooling system according to claim 1, is characterized in that: described air cooling condenser (5) is also provided with the pumped vacuum systems for extracting incondensable gas in air cooling condenser.
8. novel air cooling system according to claim 7, it is characterized in that: described pumped vacuum systems comprises vacuum lead (7) and water ring vaccum pump (8), one end of vacuum lead (7) is connected with air cooling condenser (5), and the other end is connected on water ring vaccum pump (8).
9. the novel air cooling system according to claim 7 or 8, it is characterized in that: each cooling unit of described air cooling condenser (5) all comprises for the following current part of the water of condensation that leads with for coordinating the reflux fraction taken away by incondensable gas with pumped vacuum systems, and vacuum lead (7) is connected with the reflux fraction on each cooling unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410834100.4A CN104533545A (en) | 2014-12-27 | 2014-12-27 | Novel air cooling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410834100.4A CN104533545A (en) | 2014-12-27 | 2014-12-27 | Novel air cooling system |
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| CN104533545A true CN104533545A (en) | 2015-04-22 |
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| CN201410834100.4A Pending CN104533545A (en) | 2014-12-27 | 2014-12-27 | Novel air cooling system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107726878A (en) * | 2017-11-08 | 2018-02-23 | 国电科学技术研究院 | Gravity-flow ventilation direct air cooling system |
| CN111578735A (en) * | 2020-05-15 | 2020-08-25 | 山西泰锐达科技有限公司 | Direct air-cooling condensing system and operation control method thereof |
| CN114427484A (en) * | 2021-12-31 | 2022-05-03 | 华中科技大学 | Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy |
| CN114754599A (en) * | 2022-04-24 | 2022-07-15 | 华北电力科学研究院有限责任公司 | Heat exchange system and method of surface type indirect air cooling system |
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| GB1045595A (en) * | 1964-03-17 | 1966-10-12 | English Electric Co Ltd | Dry cooling towers |
| US3935902A (en) * | 1971-10-25 | 1976-02-03 | Tyeploelektroprojekt | Condensation apparatus for steam turbine power plants |
| US20070296093A1 (en) * | 2004-09-29 | 2007-12-27 | Russel-Smith Kevan V | Cooling Tower |
| CN101551201A (en) * | 2009-05-08 | 2009-10-07 | 北京布鲁斯盖环保科技发展有限公司 | Thermal power plant combined ventilation direct air cooling system |
| CN101614486A (en) * | 2009-07-22 | 2009-12-30 | 北京布鲁斯盖环保科技发展有限公司 | Mechanical draft indirect dry cooling system |
| CN201787827U (en) * | 2009-11-03 | 2011-04-06 | 李宁 | Natural ventilation air cooling condenser |
| CN102980417A (en) * | 2012-12-03 | 2013-03-20 | 中国电力工程顾问集团西北电力设计院 | Tower type direct air cooled condenser and tower type direct dry cooling system thereof |
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2014
- 2014-12-27 CN CN201410834100.4A patent/CN104533545A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1045595A (en) * | 1964-03-17 | 1966-10-12 | English Electric Co Ltd | Dry cooling towers |
| US3935902A (en) * | 1971-10-25 | 1976-02-03 | Tyeploelektroprojekt | Condensation apparatus for steam turbine power plants |
| US20070296093A1 (en) * | 2004-09-29 | 2007-12-27 | Russel-Smith Kevan V | Cooling Tower |
| CN101551201A (en) * | 2009-05-08 | 2009-10-07 | 北京布鲁斯盖环保科技发展有限公司 | Thermal power plant combined ventilation direct air cooling system |
| CN101614486A (en) * | 2009-07-22 | 2009-12-30 | 北京布鲁斯盖环保科技发展有限公司 | Mechanical draft indirect dry cooling system |
| CN201787827U (en) * | 2009-11-03 | 2011-04-06 | 李宁 | Natural ventilation air cooling condenser |
| CN102980417A (en) * | 2012-12-03 | 2013-03-20 | 中国电力工程顾问集团西北电力设计院 | Tower type direct air cooled condenser and tower type direct dry cooling system thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107726878A (en) * | 2017-11-08 | 2018-02-23 | 国电科学技术研究院 | Gravity-flow ventilation direct air cooling system |
| CN107726878B (en) * | 2017-11-08 | 2023-12-22 | 国家能源集团科学技术研究院有限公司 | Natural ventilation direct air cooling system |
| CN111578735A (en) * | 2020-05-15 | 2020-08-25 | 山西泰锐达科技有限公司 | Direct air-cooling condensing system and operation control method thereof |
| CN114427484A (en) * | 2021-12-31 | 2022-05-03 | 华中科技大学 | Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy |
| CN114427484B (en) * | 2021-12-31 | 2022-12-02 | 华中科技大学 | Direct air cooling system for ammonia-doped power plant by using ammonia cooling energy |
| CN114754599A (en) * | 2022-04-24 | 2022-07-15 | 华北电力科学研究院有限责任公司 | Heat exchange system and method of surface type indirect air cooling system |
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Application publication date: 20150422 |