CN101566079A - Condensing system for heating heat-supply hot water with heat of waste steam from steam turbine - Google Patents
Condensing system for heating heat-supply hot water with heat of waste steam from steam turbine Download PDFInfo
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- CN101566079A CN101566079A CNA2009100276326A CN200910027632A CN101566079A CN 101566079 A CN101566079 A CN 101566079A CN A2009100276326 A CNA2009100276326 A CN A2009100276326A CN 200910027632 A CN200910027632 A CN 200910027632A CN 101566079 A CN101566079 A CN 101566079A
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Abstract
The invention relates to a condensing system for heating heat-supply hot water with heat of waste steam from a steam turbine, which comprises a generator (1), a steam turbine (2) and a direct air-cooling system, wherein the direct air-cooling system comprises an air-cooling blow-off pipeline (3), an upper valve (4) in the air-cooling blow-off pipeline, an air cooling condenser (5), an air-cooling blower (6), an air-cooling condensed water pipeline (7), an upper valve (8) in the air-cooling condensed water pipeline, an air-cooling vacuum-pumping pipeline (9), a vacuum-pumping device (10) and a condensed water collecting device (16). The air-cooling blow-off pipeline (3) of the direct air-cooling system is parallelly provided with a moisture heat exchanger system; the moisture heat exchanger system comprises a moisture heat exchanger (11), a condensate pipeline (12) of the moisture heat exchanger, an upper valve (13) in condensate pipeline of the moisture heat exchanger, a steam feed pipeline (14) of the moisture heat exchanger, an upper valve (15) in the steam feed pipeline of the moisture heat exchanger and a vacuum-pumping pipeline (17) of the moisture heat exchanger. The condensing system reduces the energy waste generated during the direct discharge of the heat of the waste steam into atmosphere from the air through heat exchange, improves the energy utilization and reduces atmosphere thermal pollution.
Description
(1) technical field
The present invention relates to a kind of and the supporting condensing system of steam turbine, be applicable to heat power station condensation exhaust steam in steam turbine and the process of utilizing exhaust steam heat energy.
(2) background technique
Energy crisis has produced tremendous influence to our production, life.The present energy resource structure of China is still based on coal, and coal-fired thermal power plant build " three Norths " area of rich coal lack of water in more.These areas not only lack the water resources that people depend on for existence, and winter time very long temperature cold, the heat supply heating phases in most areas reach 5-6 month.The power station air cooling technology is because its water saving characteristics enjoy favor, and very fast in China's development in recent years, particularly Direct Air-Cooling Technology has obtained extensive use.
Direct air cooling system is made up of heat exchanger pipe bundle, blower fan group, steel platform, windbreak, steam line, condensing water conduit, vacuum lead, water ring vaccum pump (or stream-jet ejector) and electric control system.Direct air cooling system is carried out air blast by the tube bank of blower fan heat exchanging and is produced forced-convection heat transfer, and the exhaust steam that steam turbine is discharged is condensed into water in heat exchanger pipe bundle, and keeps the back pressure value of steam turbine to move within the limits prescribed.The application of Direct Air-Cooling Technology, having changed former clammy unit need utilize water to cool off the situation of exhaust steam in steam turbine, significantly reduced power plant's generating water consumption, alleviated the contradiction of striving water, played important function for keeping the local economy sustainable development with local industrial or agricultural, life.
But also there is its deficiency in direct air cooling system, in this system, the exhaust steam that steam turbine is discharged is all by being condensed into water with the air heat exchange, a large amount of heat (account for exhaust steam total heat energy 90%) all directly enters atmosphere by air and does not obtain utilizing, and near the required heat supply of the resident's winter heating the northern area thermal power plant need consume a large amount of energy (coal) again toward contact.If the heat supply heating of resident living can be saved the energy many so that consumed every year near the steam latent heat in the steam turbine discharge exhaust steam of thermal power plant can being used for.
(3) summary of the invention
The objective of the invention is to address the above problem, a kind of condensing system that utilizes the exhaust steam in steam turbine heat to heat heat supply hot water is provided.
The object of the present invention is achieved like this: a kind of condensing system that utilizes the exhaust steam in steam turbine heat to heat heat supply hot water, comprise generator, steam turbine, direct air cooling system, described direct air cooling system comprises the air cooling blow-off line, valve on the air cooling blow-off line, air cooling condenser, air cooling blower fan, the air cooling condensing water conduit, valve on the air cooling condensing water conduit, the air cooling vacuum lead, vaccum-pumping equipment and water of condensation gathering-device, it is characterized in that one road vapor-water heat exchanger system that on the air cooling blow-off line of described direct air cooling system, has been arranged in parallel, described vapor-water heat exchanger system comprises vapor-water heat exchanger, the vapor-water heat exchanger condensing water conduit, valve on the vapor-water heat exchanger condensing water conduit, vapor-water heat exchanger admission pipeline, valve and vapor-water heat exchanger vacuum lead on the vapor-water heat exchanger admission pipeline, described vapor-water heat exchanger vacuum lead inserts described vaccum-pumping equipment, and the vapor-water heat exchanger condensing water conduit inserts described water of condensation gathering-device.
The present invention is by the cover vapor-water heat exchanger system that increases in parallel again on the blow-off line of former direct air cooling system, utilize the characteristics that Direct Air-cooled Unit steam discharge back pressure can higher operation, form a kind of condensing system that utilizes the exhaust steam in steam turbine heat to heat heat supply hot water.
Compare with conventional art, the technology of the present invention has the following advantages:
1, improved rate of energy
The exhaust steam in steam turbine heat by the vapour condenser heat hot water, had both been reduced directly that the exhaust steam heat was directly entered the energy waste of atmosphere by heat exchange by air, also provide heat demand simultaneously, energy utilization rate is greatly enhanced.Is that the 110t/h unit is an example with a heat supply for condition exhaust steam in steam turbine displacement,
Its exhaust steam energy can realize the 2760m3/h flow following 50 ℃ advance, the ability of heat supply hot water that 70 ℃ go out, can satisfy the heat demand of 58000KW, benefit is more considerable.
2, environmental protection
Conventional art, the exhaust steam in steam turbine energy directly enters atmosphere by heat exchange by air, has caused thermo-pollution to atmosphere, utilizes the technology of the present invention then can significantly reduce pollution.
To sum up, utilize exhaust steam in steam turbine heat heat hot water by vapor-water heat exchanger, heat demand is provided, both reduced the energy waste that directly the exhaust steam energy is directly entered atmosphere by heat exchange by air, improved energy utilization rate, also reduce the atmospheric heat pollution, met national energy-conserving and environment-protective sustainable development requirement.
(4) description of drawings
Fig. 1 heats condensing system scheme one schematic representation of heat supply hot water for the present invention utilizes the exhaust steam in steam turbine heat.
Fig. 2 heats condensing system scheme two schematic representation of heat supply hot water for the present invention utilizes the exhaust steam in steam turbine heat.
Fig. 3 heats condensing system scheme three schematic representation of heat supply hot water for the present invention utilizes the exhaust steam in steam turbine heat.
Fig. 4 heats condensing system scheme four schematic representation of heat supply hot water for the present invention utilizes the exhaust steam in steam turbine heat.
Reference character among the figure:
Generator 1
Steam turbine 2
Air cooling blow-off line 3
Valve 4 on the air cooling blow-off line
Air cooling condenser 5
Air cooling blower fan 6
Air cooling condensing water conduit 7
Valve 8 on the air cooling condensing water conduit
Air cooling vacuum lead 9
Vaccum-pumping equipment 10
Vapor-water heat exchanger 11
Vapor-water heat exchanger condensing water conduit 12
Valve 13 on the vapor-water heat exchanger condensing water conduit
Vapor-water heat exchanger admission pipeline 14
Valve 15 on the vapor-water heat exchanger admission pipeline
Water of condensation gathering-device (steam exhaust device, condensate water tank) 16
Vapor-water heat exchanger vacuum lead 17
Heat supply hot water advances/goes out 19.
(5) embodiment
Scheme one is to scheme three system flow basically identicals: comprise the condenser system that two-way is relatively independent, wherein one the tunnel is former direct air cooling system, mainly is made up of valve 8, air cooling vacuum lead 9, vaccum-pumping equipment 10 and water of condensation gathering-device (steam exhaust device, condensate water tank) 16 on valve 4, air cooling condenser 5, air cooling blower fan 6, air cooling condensing water conduit 7, the air cooling condensing water conduit on generator 1, steam turbine 2, air cooling blow-off line 3, the air cooling blow-off line.Another road is to go up vapor-water heat exchanger system in parallel at former direct air cooling system exhaust line 3 (or water of condensation gathering-device 16 of steam turbine below), mainly is made up of valve 15, water of condensation gathering-device (steam exhaust device, condensate water tank) 16, vapor-water heat exchanger vacuum lead 17 and vaccum-pumping equipment 10 on valve 13, vapor-water heat exchanger admission pipeline 14, the vapor-water heat exchanger admission pipeline on vapor-water heat exchanger 11, vapor-water heat exchanger condensing water conduit 12, the vapor-water heat exchanger condensing water conduit.In this condenser system, steam turbine 2 is discharged exhaust steam and can directly be sent in the air cooling condenser 5 by air cooling blow-off line 3, the air cooling blower fan 6 of air cooling condenser 5 bottoms makes cool air from bottom to top flow through air cooling condenser 5 outer surfaces, make air and steam turbine 2 steam discharges carry out heat exchange, exhaust steam is condensed into water, water of condensation flows to water of condensation gathering-device (steam exhaust device, condensate water tank) 16 by air cooling condensing water conduit 7, sends peripheral system 18 again back to.Steam turbine 2 is discharged exhaust steam and also can be sent in the vapor-water heat exchanger 11 by vapor-water heat exchanger admission pipeline 14, carries out heat exchange with hot water, and exhaust steam is condensed into water.Wherein water of condensation flows to water of condensation gathering-device (steam exhaust device, condensate water tank) 16 by vapor-water heat exchanger condensing water conduit 12, sends peripheral system 18 again back to, and the hot water after being heated is delivered to heating system and is used for user's heating.Vaccum-pumping equipment 10 is used to extract the incoagulable gas in air cooling condenser 5 and the vapor-water heat exchanger 11, keeps the degree of vacuum of system and guarantees the equipment heat exchange efficiency.
When unit carries out the operation of heat supply operating mode, under system vacuum meets the requirements of situation, at first valve 8 on valve 4 on the air cooling blow-off line and the air cooling condensing water conduit is closed, valve 13 on valve 15 and the vapor-water heat exchanger condensing water conduit on the vapor-water heat exchanger admission pipeline is opened, promptly at first steam turbine 2 steam discharges are sent into heat hot water in the vapor-water heat exchanger 11.
Change at heating demand, and when steam turbine 2 remains displacements greater than air cooling condenser 5 antifreeze loads (by the decision of air cooling condenser heat-exchange performance), open on the air cooling blow-off line valve 8 on the valve 4 and air cooling condensing water conduit as required, start air cooling blower fan 6 simultaneously, opening the quantity of valve and quantity, the rotating speed of startup air cooling blower fan is determined by service condition, its objective is that the pressure of keeping system is in claimed range when the heat exchange load of vapor-water heat exchanger changes according to heat demand.
Change at heating demand, and when steam turbine residue displacement does not satisfy the antifreeze load of air cooling condenser (by the decision of air cooling condenser heat-exchange performance), close on the air cooling blow-off line valve 8 on the valve 4 and air cooling condensing water conduit, close air cooling blower fan 6 simultaneously, regulate the displacement of steam turbine 2 as required, its objective is that the pressure of keeping system is in claimed range when the heat exchange load of vapor-water heat exchanger changes according to heat demand.
When unit carries out the operation of non-heating operating mode, on the vapor-water heat exchanger condensing water conduit on valve 13 and the vapor-water heat exchanger admission pipeline valve 15 close, vapor-water heat exchanger 11 drops into maintenance, and all steam discharges of steam turbine are sent into condensation in the air cooling condenser 5.
Wherein, scheme two is with the difference of scheme one: in scheme two, water of condensation gathering-device 16 is arranged on steam turbine 2 belows, be called in the industry to be commonly called as and be steam exhaust device, turbine discharge enters blow-off line by water of condensation gathering-device 16 earlier and enters vapour condenser 5 condensations again, water of condensation relends and helps flow by gravity to arrange into water of condensation gathering-device 16, as Fig. 2.In scheme two, air cooling blow-off line 3 all is connected on the water of condensation gathering-device 16 with vapor-water heat exchanger admission pipeline 14.
Scheme three is with the difference of scheme two: in scheme three, air cooling blow-off line 3 directly is communicated with vapor-water heat exchanger admission pipeline 14, as Fig. 3.
Scheme four: consider public vaccum-pumping equipment 10 and water of condensation gathering-device in vapor-water heat exchanger system, the direct air cooling system among Fig. 1 (scheme one) were arranged in 16 minutes, promptly two systems are equipped with vaccum-pumping equipment 10 and water of condensation gathering-device 16 respectively separately, as Fig. 4.This is arranged as from patent right covering aspect considers, not necessarily can use in the actual engineering.
Claims (4)
1, a kind of condensing system that utilizes the exhaust steam in steam turbine heat to heat heat supply hot water, comprise generator (1), steam turbine (2) and direct air cooling system, described direct air cooling system comprises air cooling blow-off line (3), valve on the air cooling blow-off line (4), air cooling condenser (5), air cooling blower fan (6), air cooling condensing water conduit (7), valve on the air cooling condensing water conduit (8), air cooling vacuum lead (9), vaccum-pumping equipment (10) and water of condensation gathering-device (16), it is characterized in that on the air cooling blow-off line (3) of described direct air cooling system or water of condensation gathering-device (16), being arranged in parallel one road vapor-water heat exchanger system, described vapor-water heat exchanger system comprises vapor-water heat exchanger (11), vapor-water heat exchanger condensing water conduit (12), valve on the vapor-water heat exchanger condensing water conduit (13), vapor-water heat exchanger admission pipeline (14), valve (15) and vapor-water heat exchanger vacuum lead (17) on the vapor-water heat exchanger admission pipeline, described vapor-water heat exchanger vacuum lead (17) inserts described vaccum-pumping equipment (10), and vapor-water heat exchanger condensing water conduit (12) inserts described water of condensation gathering-device (16).
2, a kind of condensing system that utilizes the exhaust steam in steam turbine heat to heat heat supply hot water according to claim 1, it is characterized in that: described vapor-water heat exchanger admission pipeline (14) directly is connected on the air cooling blow-off line (3).
3, a kind of condensing system that utilizes the exhaust steam in steam turbine heat to heat heat supply hot water according to claim 1 is characterized in that: described air cooling blow-off line (3) all is connected on the water of condensation gathering-device (16) of steam turbine (2) below with vapor-water heat exchanger admission pipeline (14).
4, a kind of condensing system that utilizes the exhaust steam in steam turbine heat to heat heat supply hot water according to claim 1, it is characterized in that: described air cooling blow-off line (3) is directly logical repeatedly with vapor-water heat exchanger admission pipeline (14), and described air cooling blow-off line (3) is connected on the water of condensation gathering-device (16) of steam turbine (2) below.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100276326A CN101566079B (en) | 2009-05-15 | 2009-05-15 | Condensing system for heating heat-supply hot water with heat of waste steam from steam turbine |
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| CN2009100276326A CN101566079B (en) | 2009-05-15 | 2009-05-15 | Condensing system for heating heat-supply hot water with heat of waste steam from steam turbine |
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| CN101566079A true CN101566079A (en) | 2009-10-28 |
| CN101566079B CN101566079B (en) | 2012-03-21 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832156A (en) * | 2010-05-10 | 2010-09-15 | 江苏双良空调设备股份有限公司 | Condensation heat recovering and central heating supply system of power plant direct air cooling unit |
| CN103180666A (en) * | 2010-12-27 | 2013-06-26 | 三菱重工业株式会社 | Condensate flow rate control device for power-plant, and control method |
| CN106224023A (en) * | 2016-07-26 | 2016-12-14 | 西安交通大学 | A kind of combined cycle indirect air cooling system |
| CN106481376A (en) * | 2016-12-05 | 2017-03-08 | 中国华能集团清洁能源技术研究院有限公司 | A kind of device and method of utilization air cooling unit exhaust steam cogeneration |
| CN106931464A (en) * | 2015-12-30 | 2017-07-07 | 韩建平 | The supply air system of thermal power plant's Air-Cooling Island cooling wind and boiler air-supply cooperation |
| CN109882251A (en) * | 2019-04-09 | 2019-06-14 | 福州怡辉电力设备有限公司 | Air-cooled high back pressure thermal power plant unit controls back pressure frequency modulation system and adjusting method in short-term |
-
2009
- 2009-05-15 CN CN2009100276326A patent/CN101566079B/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832156A (en) * | 2010-05-10 | 2010-09-15 | 江苏双良空调设备股份有限公司 | Condensation heat recovering and central heating supply system of power plant direct air cooling unit |
| CN103180666A (en) * | 2010-12-27 | 2013-06-26 | 三菱重工业株式会社 | Condensate flow rate control device for power-plant, and control method |
| CN103180666B (en) * | 2010-12-27 | 2015-08-26 | 三菱日立电力系统株式会社 | The condensing water flow control device of generating equipment and control method |
| US9709261B2 (en) | 2010-12-27 | 2017-07-18 | Mitsubishi Hitachi Power Systems, Ltd. | Condensate flow rate control device and condensate flow rate control method for power plant |
| CN106931464A (en) * | 2015-12-30 | 2017-07-07 | 韩建平 | The supply air system of thermal power plant's Air-Cooling Island cooling wind and boiler air-supply cooperation |
| CN106224023A (en) * | 2016-07-26 | 2016-12-14 | 西安交通大学 | A kind of combined cycle indirect air cooling system |
| CN106224023B (en) * | 2016-07-26 | 2019-02-05 | 西安交通大学 | A kind of combined cycle indirect air cooling system |
| CN106481376A (en) * | 2016-12-05 | 2017-03-08 | 中国华能集团清洁能源技术研究院有限公司 | A kind of device and method of utilization air cooling unit exhaust steam cogeneration |
| CN109882251A (en) * | 2019-04-09 | 2019-06-14 | 福州怡辉电力设备有限公司 | Air-cooled high back pressure thermal power plant unit controls back pressure frequency modulation system and adjusting method in short-term |
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| Publication number | Publication date |
|---|---|
| CN101566079B (en) | 2012-03-21 |
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Owner name: SHUANGLIANG ECO-ENERGEY SYSTEMS CO.,LTD. Free format text: FORMER OWNER: SHUANGLIANG AIR CONDITIONING EQUIPMENT CO LTD, JIANGSU Effective date: 20100913 |
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Effective date of registration: 20100913 Address after: 214444 Jiangsu city of Jiangyin Province Li Town Road No. 1 West Applicant after: Shuangliang Energy Saving System Co., Ltd. Address before: 214444 Jiangsu city of Jiangyin Province Li Town Road No. 1 West Applicant before: Shuangliang Air Conditioning Equipment Co., Ltd., Jiangsu |
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