EP1917422A1 - Kondensationsverfahren - Google Patents
KondensationsverfahrenInfo
- Publication number
- EP1917422A1 EP1917422A1 EP06761709A EP06761709A EP1917422A1 EP 1917422 A1 EP1917422 A1 EP 1917422A1 EP 06761709 A EP06761709 A EP 06761709A EP 06761709 A EP06761709 A EP 06761709A EP 1917422 A1 EP1917422 A1 EP 1917422A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- condensate
- condensation
- turbine
- condenser
- air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K9/00—Plants characterised by condensers arranged or modified to co-operate with the engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B1/00—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser
- F28B1/06—Condensers in which the steam or vapour is separate from the cooling medium by walls, e.g. surface condenser using air or other gas as the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
- F28B9/10—Auxiliary systems, arrangements, or devices for extracting, cooling, and removing non-condensable gases
Definitions
- the invention relates to a condensation method with the features in the preamble of patent claim 1.
- the power plant efficiency is a factor that has a decisive influence on the economy, especially in the case of new planning of power plants. There are therefore many efforts to optimize steam power processes in thermal power plants. Particular attention is paid to the condensation system. In particular, the potential in terms of power plant efficiency is not yet optimally utilized when using air-cooled condensers, such as those often used in water shortages at the power plant site. Air-cooled condensers have the inherent disadvantage that only the dry air temperature can be used. In addition, when operating with particularly low evaporation pressures, the condensate subcooling is greater than with water-cooled surface condensers.
- Air-cooled condensers usually have two condensation stages. In a first condensation stage, about 80-90% of the exhaust steam of a turbine is condensed. A 100% condensation in the first condensation stage is due to the process-related parameters, such as the fluctuating outside temperatures virtually impossible, so that in any case a second condensation stage for the residual steam condensation is required. For this reason, condensed and dephlegmatorily switched air-cooled condensers are often combined with each other, wherein the dephlegmatoric condensation is provided for residual vapor condensation, thus forming the second condensation stage.
- the recovered condensate is fed directly to a Kondensatsammeitank. Subsequently, the condensate is fed to a degasser, is added in the treated as a replacement for loss of leakage processed water, to then be fed via a feed pump again upstream of the turbine evaporator. Since the condensate must be brought back to boiling temperature in the deaerator for degassing, it is detrimental to the energy balance if the condensate was previously overcooled, since ultimately an increased energy supply must be realized through the use of primary fuels. It is therefore desirable to minimize the overcooling of the condensate to minimize the use of primary fuels. At the same time, the aim is also to keep the amount of energy to be used for the condensation of the turbine exhaust steam as low as possible.
- the invention has for its object to provide a condensation method in which the supercooling of the condensate can be minimized to improve the power plant efficiency.
- the condensate stream obtained in the condenser is heated prior to introduction into a condensate storage tank in a condensate heating stage specially provided for this purpose.
- the heating of the condensate stream takes place within the Kondensat mayber Anlagentrench by the turbine exhaust steam.
- the partial steam flow emerging from the condenser is fed to a degasser, in which the partial steam flow heats colder additional feed water and completely condenses itself.
- a condensate heating stage provided in addition to a degasser makes it possible, in the switching mode according to the invention, to significantly minimize condensate subcooling and thus to reduce the use of primary fuels.
- the thermal energy of the turbine exhaust steam flow is used much more effectively, since it is not discharged through the capacitors to the environment, but flows to a large extent in the condensate, so the heat cycle is largely retained.
- the reduced energy losses lead to the desired improvement in power plant efficiency.
- a condensation of a part of the turbine exhaust steam flow is achieved at the same time, so that less exhaust steam enters the condenser.
- the capacitors can be made smaller.
- the first condensation stage that is the air-cooled condenser
- the second condensation stage for condensing the excess steam.
- the structure of the air-cooled condenser is simplified.
- the inventive method is also applicable to capacitors, both condensed as well as dephlegmatorisch switched
- the degassing of the additional feed water is first and foremost, preferably exclusively, in the designated degasser. Due to the heating of the condensate stream in the condensate warm-up stage, gases can also escape here as a result of the process, but the heated condensate is very poor in inert gases, so that only small amounts of gas are produced within the condensate-warming stage. The gases can be removed by suction just like a dephlegmator and, like a degasser.
- the heated additional feed water from the degasifier is preferably also supplied to the condensate warm-up stage, so that the additional feed water is heated in two stages.
- the condensate stream from the condenser is sufficient to condense a portion of the turbine effluent stream, complete condensation of the partial steam effluent exiting the condenser is virtually impossible for energy balance reasons. A condensation of the partial steam flow can be ensured by a sufficient amount of colder additional feed water in each case.
- the condensate In order to improve the heat transfer within the Kondensaticar Anlagenr, it is intended to bring the condensate in droplet form with the turbine exhaust steam in contact. This can be done by passing the condensate over moldings and bringing it in countercurrent contact with the turbine effluent stream.
- the shaped bodies can be arranged in cascade. In principle, a cascade-like arrangement of metal sheets without the use of molded bodies is also conceivable.
- the decisive factor is the optimization of the heat transfer from the turbine waste steam to the supercooled condensate. In this context, it is considered particularly expedient to atomize the condensate for droplet formation.
- the condensate can therefore be introduced by means of nozzles in the Kondensat mayberdicarmnote.
- the droplets of supercooled condensate form condensation nuclei of low temperature within the condensate warm-up stage, thereby accelerating the condensation of the turbine effluent stream while at the same time raising the temperature of the conden
- FIG. 1 shows a greatly simplified steam power process of a thermal power plant, in which a turbine waste steam stream 2 is fed to a condenser 3 from a turbine 1 via a line.
- the condenser 3 is an air-cooled condenser with condenser-connected heat exchanger elements 4 and dephlegmatorily connected heat exchanger elements 5. A majority of the turbine waste steam flow condenses inside the condenser 3.
- the recovered condensate K is supplied from the condenser 3, starting from a condensate warm-up stage 6, within which the supercooled condensate K comes into contact with the turbine waste steam stream 2.
- the condensate K is heated so that a partial vapor stream of the turbine effluent stream 2 is condensed into the condenser 3 via line 7 and is returned directly to the material cycle as part of the condensate K3, even before the turbine effluent stream K.
- a degasser 8 is provided, to which a partial steam flow T exiting from the condenser 3 is supplied.
- the partial steam flow T is condensed by supplying colder additional feed water W. In this case, the additional feed water W is heated and degassed at the same time.
- the degasser 8 serves as a sort of downstream second condensation stage.
- the condensate K1 from the degasser 8 is fed to the condensate warm-up stage 6, in which the subcooling of the condensates K, K1 is used to condense a part of the turbine effluent stream 2.
- FIG. 2 differs from that of Figure 1 primarily in that the capacitor 9 is connected only dephlegmatorisch. This can be seen at the steam inlet at the lower edge region of the condenser 9.
- an excess steam condenser 11 is provided in addition to the degasser 8 as a second condensation stage.
- the excess steam condenser 11 is used to excess vapor T2, which is already heavily enriched with inert gases from the condenser 9, completely to condense by adding feed water W. This has the effect that the additional feed water W is heated and mixed with the condensate from the excess steam.
- the mixture is fed as condensate stream K2 to the condensate warm-up stage 6.
- an air exhaust 10 is provided to remove gases from the material flow.
- the air exhaust 10 is connected both to the exclusively dephlegmatorisch switched capacitor 9 and the dephlegmatorisch connected heat exchanger elements 5, as well as to the Kondensataufissermhand 6 and to the degasser 8 and the excess steam condenser 11.
- the entire condensate K3 is fed in a manner not shown a Kondensatsammeitank.
- FIG. 3 shows the calculated change in the thermal efficiency of the process (in%) plotted via condensate subcooling (in K).
- ⁇ th P / (Qin + ⁇ Qin)
- turbine output 600 MW exhaust steam mass flow 369 kg / s, exhaust steam enthalpy 2330 kJ / kg, evaporating pressure 7 kPa, saturated steam temperature 39 ° C, heat input 1400.26 MW.
- the advantage of the method according to the invention is expressed by the fact that the supercooling of the condensate can be greatly reduced, which affects the improvement of the efficiency.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102005040380A DE102005040380B3 (de) | 2005-08-25 | 2005-08-25 | Kondensationsverfahren |
PCT/DE2006/001097 WO2007022738A1 (de) | 2005-08-25 | 2006-06-27 | Kondensationsverfahren |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1917422A1 true EP1917422A1 (de) | 2008-05-07 |
EP1917422B1 EP1917422B1 (de) | 2009-04-01 |
Family
ID=36650820
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06761709A Not-in-force EP1917422B1 (de) | 2005-08-25 | 2006-06-27 | Kondensationsverfahren |
Country Status (18)
Country | Link |
---|---|
US (1) | US20100132362A1 (de) |
EP (1) | EP1917422B1 (de) |
JP (1) | JP4542187B2 (de) |
KR (1) | KR20080016628A (de) |
CN (1) | CN101208498A (de) |
AP (1) | AP2007004105A0 (de) |
AT (1) | ATE427413T1 (de) |
AU (1) | AU2006284266B2 (de) |
CA (1) | CA2610872A1 (de) |
DE (2) | DE102005040380B3 (de) |
ES (1) | ES2324798T3 (de) |
IL (1) | IL189649A0 (de) |
MA (1) | MA29562B1 (de) |
MX (1) | MX2007010783A (de) |
RU (1) | RU2355895C1 (de) |
TN (1) | TNSN07284A1 (de) |
WO (1) | WO2007022738A1 (de) |
ZA (1) | ZA200801846B (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9890948B2 (en) | 2013-07-05 | 2018-02-13 | Siemens Aktiengesellschaft | Method for preheating feed water in steam power plants, with process steam outcoupling |
EP2871335A1 (de) | 2013-11-08 | 2015-05-13 | Siemens Aktiengesellschaft | Modul zur Kondensation von Wrasendampf und zur Kühlung von Turbinenabwasser |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3040528A (en) * | 1959-03-22 | 1962-06-26 | Tabor Harry Zvi | Vapor turbines |
DE2257369A1 (de) * | 1972-11-23 | 1974-05-30 | Deggendorfer Werft Eisenbau | Kondensatoranlage |
US4905474A (en) * | 1988-06-13 | 1990-03-06 | Larinoff Michael W | Air-cooled vacuum steam condenser |
WO1990007633A1 (en) * | 1989-01-06 | 1990-07-12 | Birwelco Limited | Steam condensing apparatus |
US5165237A (en) * | 1991-03-08 | 1992-11-24 | Graham Corporation | Method and apparatus for maintaining a required temperature differential in vacuum deaerators |
DE19549139A1 (de) * | 1995-12-29 | 1997-07-03 | Asea Brown Boveri | Verfahren und Apparateanordnung zur Aufwärmung und mehrstufigen Entgasung von Wasser |
US5765629A (en) * | 1996-04-10 | 1998-06-16 | Hudson Products Corporation | Steam condensing apparatus with freeze-protected vent condenser |
DE19810580A1 (de) * | 1998-03-11 | 1999-09-16 | Siemens Ag | Dampfeinlaßventil |
US6531206B2 (en) * | 2001-02-07 | 2003-03-11 | 3M Innovative Properties Company | Microstructured surface film assembly for liquid acquisition and transport |
DE10333009B3 (de) * | 2003-07-18 | 2004-08-19 | Gea Energietechnik Gmbh | Anordnung zur Kondensation von Wasserdampf |
JP4155916B2 (ja) * | 2003-12-11 | 2008-09-24 | 大阪瓦斯株式会社 | 排熱回収システム |
-
2005
- 2005-08-25 DE DE102005040380A patent/DE102005040380B3/de not_active Expired - Fee Related
-
2006
- 2006-06-27 WO PCT/DE2006/001097 patent/WO2007022738A1/de active Application Filing
- 2006-06-27 KR KR1020077028898A patent/KR20080016628A/ko not_active Application Discontinuation
- 2006-06-27 CA CA002610872A patent/CA2610872A1/en not_active Abandoned
- 2006-06-27 RU RU2007134111/06A patent/RU2355895C1/ru not_active IP Right Cessation
- 2006-06-27 US US12/063,175 patent/US20100132362A1/en not_active Abandoned
- 2006-06-27 ES ES06761709T patent/ES2324798T3/es active Active
- 2006-06-27 DE DE502006003341T patent/DE502006003341D1/de active Active
- 2006-06-27 AU AU2006284266A patent/AU2006284266B2/en not_active Expired - Fee Related
- 2006-06-27 JP JP2008527295A patent/JP4542187B2/ja not_active Expired - Fee Related
- 2006-06-27 MX MX2007010783A patent/MX2007010783A/es not_active Application Discontinuation
- 2006-06-27 AT AT06761709T patent/ATE427413T1/de active
- 2006-06-27 EP EP06761709A patent/EP1917422B1/de not_active Not-in-force
- 2006-06-27 AP AP2007004105A patent/AP2007004105A0/xx unknown
- 2006-06-27 CN CNA2006800051929A patent/CN101208498A/zh active Pending
-
2007
- 2007-07-20 TN TNP2007000284A patent/TNSN07284A1/en unknown
- 2007-12-24 MA MA30503A patent/MA29562B1/fr unknown
-
2008
- 2008-02-21 IL IL189649A patent/IL189649A0/en unknown
- 2008-02-26 ZA ZA200801846A patent/ZA200801846B/xx unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2007022738A1 * |
Also Published As
Publication number | Publication date |
---|---|
AU2006284266A1 (en) | 2007-03-01 |
JP2009506244A (ja) | 2009-02-12 |
CN101208498A (zh) | 2008-06-25 |
MX2007010783A (es) | 2007-11-07 |
JP4542187B2 (ja) | 2010-09-08 |
IL189649A0 (en) | 2008-06-05 |
WO2007022738A1 (de) | 2007-03-01 |
DE502006003341D1 (de) | 2009-05-14 |
AP2007004105A0 (en) | 2007-08-31 |
CA2610872A1 (en) | 2007-03-01 |
ATE427413T1 (de) | 2009-04-15 |
KR20080016628A (ko) | 2008-02-21 |
DE102005040380B3 (de) | 2006-07-27 |
AU2006284266B2 (en) | 2009-07-23 |
ZA200801846B (en) | 2010-06-30 |
RU2355895C1 (ru) | 2009-05-20 |
TNSN07284A1 (en) | 2008-12-31 |
MA29562B1 (fr) | 2008-06-02 |
EP1917422B1 (de) | 2009-04-01 |
US20100132362A1 (en) | 2010-06-03 |
ES2324798T3 (es) | 2009-08-14 |
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